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    • 专利摘要:
    Pump system of constant performance to any power range that is driven by a hydrostatic transmission (1) that operates at constant pressure, energizes a double displacement linear pump (15) of large displacement and low inertia, capable of pumping water from low energy levels to constant performance. Designed to work at constant manometric load, it can operate from different energy sources, even at different energy levels, both individually and jointly, which makes it suitable for pumping with height accumulation from renewable energies, alone or combined with other sources, without the need to hybridize with the electrical network. (Machine-translation by Google Translate, not legally binding)
    公开号:ES2679644A1
    申请号:ES201700151
    申请日:2017-02-24
    公开日:2018-08-29
    发明作者:Manuel Lahuerta Romeo
    申请人:Manuel Lahuerta Romeo；
    IPC主号:
    专利说明:

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    POWER RANGE
    OBJECT OF THE INVENTION
    The present invention, as expressed by the
    set forth in this specification, refers to a
    new constant performance pumping system to
    Any range of electrical power, which operated remotely through a hydrostatic transmission, and based on the concept of the positive displacement pump, is capable of operating overcoming the heights
    manometric design, with flow rates directly
    proportional to the power supplied, without loss of performance. The system is of mixed electric-solar-wind drive, allows to take advantage of low and unstable levels of energy with high yields, which opens the field towards pumping with accumulation in height from renewable energies, alone or in combination with other sources.
    FIELD OF APPLICATION OF THE INVENTION
    The field of application of the present invention is mainly within the industrial sector dedicated to pumping with height accumulation from renewable sources, intended for supply, pressure irrigation, power generation programmed by subsequent turbination and / or dual generation plants / desalination / purification by membrane procedures whose principle of operation is to have water under pressure.
    BACKGROUND OF THE INVENTION
    Positive displacement pumps have existed
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    for a long time; well-operated manual lever well pumps are known, as well as the typical multi-blade pumps driven by connecting rod mechanisms, and more modernly, the typical hydrolimpiadoras or membrane pumps used in fumigation, radially or axially operated through a crankshaft and a crank-crank mechanism whose energy comes directly from an electric or thermal motor. These designs generally work at constant rotation speeds and high travel speeds (10 m / s) in their pistons, being short runs (* 70 mm) and variable speeds along their travel (maximum in its center) and with unwanted radial stresses that precipitate its wear and reduce its mechanical performance. These changes of speed throughout their career cause permanently variable flows so they must incorporate, in their drive manifolds, hydropneumatic dampers. In these cases the motor and the pump form an integrated mechanical assembly.
    On the other hand, the hydrostatic transmission formed by an emitter (pump), a receiver (linear or rotary motor) and ducts (pressure and return), all of which constitute a closed circuit, is capable of transmitting remote powers through a hydraulic fluid (oil) under pressure. This constitutes a habitual component of great number of machines, especially those that transmit great efforts and low speed, as it is the case of the shovels loaders, backhoes, and other machines of public works.
    It is worth mentioning that the same applicant of the present patent filed a patent on pumping from deep wells 35 years ago by means of hydrostatic transmission, applied to rotodynamic pumps
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    (centrifugal) of high rotation speed, whose technological challenge was to pump from great depths without using the long shafts of
    impeller operation, in multi-stage pumps, where, due to axial thrust, they had their application limit around 100 m deep.
    On the other hand, the new high-performance electric motors with permanent magnets governed by constant torque converters are common in the use of large elevators that can accelerate and brake with large loads and high speeds (inertia). In our innovation, these engines will be responsible for driving the oil-hydraulic displacement pumps
    constant. The operation of these pumps will be at constant torque (constant pressure), the flow rate being supplied and therefore the power absorbed, depending on their rotation speed.
    The present invention contemplates the use of hydrostatic transmission as a solution for the remote transmission of large forces at low speeds (to the pistons of the pumps) with high performances, allowing the drive unit to be separated, which can be driven by different types of engines. , of the water pump itself, without keeping linearity between them; These advantages denote clear differences both in its design and in its operation with respect to the currently existing alternatives, when it comes to capturing water and storing it at height, and it should be noted that on the part of the applicant, there is no knowledge of the existence of any other document, patent or not, that has similar characteristics.
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    SUMMARY OF THE INVENTION
    Accumulating significant amounts of energy can be achieved, among other procedures, by pumping large volumes of water at great heights. The usual is the use of multistage centrifugal pumps, whose parameters (flow, pressure and performance) are closely linked to a specific rotation speed and absorbed power. Hence, to overcome constant manometric heights with good yields, constant powers are needed, which are only achieved through the power grid or thermal motors. When these accumulation facilities are intended to operate from renewable sources, their operating requirements and performance cannot be guaranteed. Only in the case of hybrid installations where renewable energies are a support for the network, they can work well.
    In isolated installations of the network, fed from renewable energies where they manifest themselves in a discontinuous and random way, it is necessary to design a system whose performance does not depend on the uniformity in the energy supply and which is also able to take advantage of, pumping , any peak or valley of energy, however large or small it may be.
    The positive displacement pump (hereinafter B.D.P.) is based on achieving the relative displacement between a plunger and its sleeve, among which there is a seal that provides its seal both dynamically and statically. The pump is characterized by its displacement, which is the volume displaced in a full stroke, getting its alternative movement through a 4/2 way distributor, linked to an oleohydraulic circuit.
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    From a single oil-hydraulic plant, several pumps with their respective motors can be operated simultaneously or alternatively, so that the sum of their convergent equipotential flows in a pressure manifold allows the operation of a B.D.P. regardless of the origin of energy sources.
    The objective is to accumulate the energy collected from renewable energies by working on the island, in the form of reservoir water at high altitude.
    In many locations it is interesting to have isolated generation facilities, based on renewable energy, as in the case of agricultural irrigation where irrigation communities pay, in addition to energy, taxes that cannot be taxed, resulting in a higher cost than others users In these cases the objective is to pump with the sun during the day and finish giving the provision through other sources at low cost hours, usually at night or during weekends, when adjusting the power term, it can be pumped simultaneously, without hybridization as they are independent systems, not electrically interconnected.
    Almost all renewable energies, especially those obtained from the sun and wind, are unpredictable, manifesting themselves randomly and in an interrupted manner, either by passing clouds in the case of solar or by gusts in the case of wind. Therefore, it is required that the receiver of this type of energy is not very sensitive to these changes and can take advantage, with the best performance, both valleys and energy peaks. The positive displacement linear pump (B.D.P.) appears at full speed here with full force
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    translation, driven by a linear motor (hydraulic cylinder) that exerts the force in the same direction as that of the resistance and therefore with maximum yields when said power transmission does not have radial components or moments. In addition, oleohydraulic circuits, driven by semi-axial piston pumps, can work at continuous pressures of up to 420 bars in a speed range from 50 to 2,100 rpm, which makes them ideal for being driven by highly flexible engines such as of permanent magnets, capable of working at constant torque in ranges from 5 to 60 Hz, when driven by inverter of constant torque vector control (WEG, Vector Motor Control, Vacon and others) when the energy comes from a photovoltaic field and is connect directly to the DC bus.
    In this way, lower irradiance levels are used, which translate into useful pumping. As soon as the electric motor can work at 10% of its capacity, it will start pumping, favored by starting without load, as the relief limiting valve of the oil-hydraulic circuit is open during the start-up phase. The same valve protects the circuit and the motor against overloads, by opening the excess bypassing the control panel when the nominal circuit pressures are exceeded.
    On the other hand, to dampen the peaks and valleys of the captured energy, a hydropneumatic bladder accumulator connected to the oil pressure duct can be used in addition to a direct current filter at the inlet of the inverter. The condition that electric motors driven by different energy sources work at constant torque (which means constant oil pressure), makes it possible to add the
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    hydraulic flows from different pumps in the pressure manifold. This makes the B.D.P. can work with the sum of energies coming from the different engines. So the B.D.P. It can be operated, from the same oil-hydraulic plant, by different energy sources independently or simultaneously.
    The alternative movement of the B.D.P. It is achieved by a 4/2 way distributor, governed by limit switches in the engine cylinders. The hydrostatic transmission, which as explained, consists of a closed oil circuit formed by the emitting pump, pressure and return ducts, limiting and distributing valves and linear hydraulic motor (cylinder), allows large efforts to be transmitted with reduced inertia to high yields and therefore it is very suitable for alternative movements, as is the case of the BDP
    Although these pumps can work in any position (vertical, horizontal and inclined), when it comes to pumping charged water as is common in river intakes or reservoirs, it is of interest that suspended particles, particularly abrasive (sands), do not they are deposited on the sliding zone (lip seal) between plunger and sleeve. Therefore, the B.D.P. proposed in the present invention has been designed to work in an upright position with suction and discharge from the bottom, so that the particle that can enter the chamber, due to its low speed, tends to precipitate and comes out without being in contact with the seal between piston and sleeve. It is therefore, single-acting cameras. To achieve a continuous flow of water, the single-acting pump must work in
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    parallel and alternately with your partner. Therefore the B.D.P. It is formed by two single-acting motor pumps that work synchronized alternately, ensuring that the flow of water is continuous.
    In the event that the pumping is carried out from the use of wind energy through turbines, so that they can work in isolated places should preferably be governed by passive systems, that is, designed in complicity with the wind (two-rotor rotors self-tuning, passive torque compensator and pitch control by centrifugal force, etc.) in which the torque is applied through a multiplier on a hydraulic pump which, in this application, must be variable displacement, capable of opposing in the form of the product of constant oil pressure by variable flow, a reaction torque that makes the turbine work within the design Lambda (A = VtiP / V „ind). In this case, the oil-hydraulic power plant must be located at the top of the tower, from where the B.D.P. , located in the water intake, through long pressure and oil return ducts, thus causing the energy use of the wind, in the form of water pumping with accumulation in height.
    The B.D.P. It has been designed to overcome a constant manometric height, conditioning, depending on the ratio of areas of their respective pistons (engine and pump), the working hydraulic pressure. Therefore, the pumps are designed to work at constant oleohydraulic pressure, capable of overcoming a constant manometric load.
    Both in the case of the wind turbine and in the case of the photovoltaic field, the control systems (adjustment
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    of the displacement of the variable displacement pump, or adjustment of the motor rotation speed by constant torque vector inverter) will provide the flow rates and design pressure at which the B.D.P. From the beginning of its operation, the B.D.P. It will operate with high yields, which is why it is considered that this is the best option for the use, by means of accumulation of water in height and subsequent turbination to the demand, of solar and / or wind energy.
    Thus, once the operability of the new pumping system recommended by the present invention has been explained, it can be seen that it represents a solution of characteristics and operation unknown until now for this purpose, reasons that, together with its practical utility, provide it with sufficient basis to obtain the privilege of exclusivity that is requested.
    BRIEF DESCRIPTION OF THE DRAWINGS
    To complete the description that is being made and in order to facilitate its understanding, a set of drawings is attached, in which, for illustrative and non-limiting purposes, the following has been represented:
    Figure 1 shows a schematic representation of the pumping system of the present invention;
    Figure 2 shows a schematic representation of a pumping system driven from energy taken from an electrical network;
    Figure 3 shows the schematic representation of a pumping system driven from energy taken from a photovoltaic field formed by solar trackers;
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    Figure 4 shows the schematic representation of a pumping system driven from energy taken from a wind turbine, and
    Figure 5 shows the schematic representation of a pumping system driven, individually or simultaneously, by means of energy from different sources.
    DESCRIPTION OF A PREFERRED EMBODIMENT
    First, a summary description is made of the elements and components that make up the schematic representations that appear in each of the figures mentioned. So:
    Figure 1 shows the schematic representation of the pumping system of the present invention, in which the set of elements that make up the hydrostatic transmission can be distinguished at first sight. These elements include:
    (1) Hydrostatic transmission
    (2) Oil hydraulic power plant
    (3) Suction duct
    (4) Oil hydraulic pump
    (5) Pressure relief valve
    (6) Non-return valve
    (7) Hydraulic conduit
    (8) 4/2 way distributor valve
    (9) Oil hydraulic cylinder
    (10) Stem
    (11) Passive circuit bleeding valve
    (12) Passive circuit filling valve
    (13) Hydropneumatic accumulator
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    (14) Return pipe.
    The set of elements that form the B.D.P. It includes those described below:
    (15) B.D.P.
    (16) Large diameter water pump plunger
    (17) Water suction valves
    (18) Filter
    (19) Water supply valves
    (20) Water supply pipe.
    The system works from the mechanical energy received in the axis of the oil-hydraulic pump (4) that by sucking oil from the oil-hydraulic plant (2) drives it at constant pressure through the non-return valve (6) by means of a hydraulic line (7 ) of high pressure, up to the 4/2 way solenoid valve (8) that alternately distributes the oil flow to two oil-hydraulic cylinders (9) that drive, through their stems (10), the two pistons (16) of the BDP (15), which, sucking the water in its upward stroke, through the filters (18) and the water suction valve (17), propel it in its downward stroke by alternately passing through the water supply valves ( 19), providing a continuous flow through the water supply pipe (20), capable of overcoming the manometric design height, up to the receiving basin in height (21).
    Figure 2 shows the schematic representation of a pumping system driven from the energy taken from an electrical network. An inverter drives the electric motor (23) at a constant torque, to move the fixed displacement oleohydraulic pump (4), proceeding from here as described in relation to the
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    Figure 3 shows the schematic representation of a pumping system driven from the energy taken from a photovoltaic field (24) formed by solar trackers, whose energy in the form of direct current, feeds a vector control inverter (25) capable of provide a constant torque to a permanent magnet electric motor (26), to move the fixed displacement oleohydraulic pump (4), proceeding from here, as described in relation to Figure 1.
    Figure 4 shows the schematic representation of a pumping system driven from the energy taken from a wind turbine (27) that, through a multiplier (28), drives the oleohydraulic pump (4) of variable displacement, proceeding from hence, as described in relation to figure 1.
    Finally, Figure 5 shows the schematic representation of a pumping system operated, individually or simultaneously, with energy from different sources: power grid, photovoltaic field and turbine
    wind. The pressurized oil flows from each of the oil pumps (4) are added to a pressure manifold (29) to feed the 4/2 way distributor valve (8) that drives the B.D.P. (fifteen). The hydraulic circuit is closed by the return duct, which pours into a single hydraulic power plant, which feeds the set of oleohydraulic pumps that form the system. In this way it is achieved that the operation of the double positive displacement pump can be carried out from one or more energy sources, either individually or simultaneously, without the need to hybridize
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    electrically
    Once the different elements and components that make up the system of the present invention have been described and identified, the operational and functional aspects of the latter will be explained. Thus, in view of the aforementioned figures and in accordance with the numerical references adopted, it will be described by way of example the realization of a pumping with a capacity of up to 1 m3 / s, overcoming a difference of 30 m between two rafts ( receiver and accumulation) of, for example, the irrigation community of the Algerri-Balaguer Canal (Lleida) from the energy captured by:
    a) A photovoltaic solar field (24) isolated from the network, on two-axis trackers,
    b) A wind turbine (27) isolated from the grid, and
    c) An electric motor (23) connected to the network.
    The double positive displacement motor pump B.D.P. It is designed so that it provides the required flow at a travel speed of the piston (16) of up to 0.5 m / s. This low speed represents the guarantee of long life, low inertia and optimum performance of the motor pump. Therefore, to displace a flow rate of 1 m3 / s at a speed of 0.5 m / s, a section of 2 rrh is required, equivalent to a piston diameter (16) of 1.6 m, for which it must be manufactured a ferrule of that inner diameter, capable of providing sufficient rigidity to perform the necessary finishing treatments.
    The next step is to determine the necessary thrust force to overcome the 30 m.c.a. (water column meter) plus internal losses due to friction and flow through the valves (19) and pipes
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    (20) that in this example it is estimated at 1 m.c.a., that is 30 + 1 = 31 m.c.a., equivalent to a pressure of 3.1 kg / cm2, resulting in a theoretical thrust of 62,298 Kg.
    The actual thrust depends on the performance, which in turn depends on the speed of travel. From here the power absorbed in kW is deduced according to the following formula:
    kW = Force x Speed x Performance whose results are shown in the following table:
     m / s  Yield % Push kN kW
     0.1  97 630 63
     0.2  96, 5 633, 3 126, 6
     0.3  96 636, 6 191
     0.4  95, 5 639, 9 256
     0.5  95 643, 3 322
    This thrust is carried out with oil at a pressure of 290 Kg / cm2 on the piston (16) of the oleohydraulic cylinder (9), being transmitted by means of its rod (10) to the piston (16) of the B.D.P. (fifteen).
    The oleohydraulic cylinder (9) constitutes the linear motor of a hydrostatic transmission (1) formed by an oleohydraulic circuit moved from a semi-axial piston oleohydraulic pump (4), for example a Parker Hannifin F12 family pump. Therefore the oleohydraulic cylinder section (9) is calculated as follows:
    Section = Force / Pressure - 65,576 / 290 - 226.1 cm2
    equivalent to a diameter of 170 mm, manufactured from
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    special lap tube for cylinder liners
    Hydraulic To avoid the buckling of the stem (10) of 2 m in length, the diameter of the latter must be
    approximately 100 mm
    In order to pump the water flow of 1 m3 / s at 31 mca, the 170 mm diameter oil-hydraulic cylinder (9) must be fed with an oil flow of 680 1 / minute, to achieve the travel speed of 0 , 5 m / s.
    This flow of 680 1 / minute is sent by means of up to three oil pumps (4) of type F12-125 driven by three independent motors: wind (27), solar (24) and electric (23) connected to the network, whose Maximum rpm, assuming an energy distribution in equal thirds, will be:
    680,000 / 125 * 3 = 1,813 rpm
    equivalent to an operating speed of electric motors (23 and 26) at 60.44 Hz. This maximum frequency will be programmed in the inverter (22 and 25) of constant torque vector control.
    Pump (4) Catalog Parker HY30 8249 / UK
     Pump model  F12-125
     Displacement  cc / rpm 125
     Max. Continuous  bar 420
     Self priming speed  rpm 2100
     Torque Torque 100 bar  Nm 198.4
     Weight  Kg 36
    The mechanical torque provided by the motors
    electrical (23 and 26) should be such as to guarantee a working pressure of 290 bar plus hydrostatic transmission losses, which in the present example are estimated at 10 bar, resulting in 290 + 10 = 300 bar, absorbing 5 a pair constant at a rate of 198.4 Nm / 100 bar of 595.2 Nm over the entire speed range.
    Below is a table of behavior of the selected engines (23 and 26):
    0
    AC Dyneo 105 kW servo motor model 1500LSRPM280sc 105 b3 / 400 VAC / 50HZ
     VAC voltage  Speed Torque Nm Intensity (A)
     442  1800 660 215
     370  1500 668 215
     333  1350 668 215
     296  1200 668 215
     259  1050 668 216
     222  900 668 216
     185  750 668 217
     148  600 668 218
     131  531 668 219
     111  450 668 219
     74  300 655 222
     37  150 630 240
    15 It can be seen that in the wide range of 150-1813 rpm, the
    torque is maintained above the one demanded by the pump (595.2 Nm), so that it can work within this range, absorbing a maximum power of 595.2 x 1813 / 9.55 = 113 kW.
    The inverter (25) with MPPT control of four algorithms for optimization of the energy captured by the
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    Photovoltaic field (24), receives the power supply by the DC bus, at a voltage of 300-800 Vdc, with a minimum installed peak power ratio KW / kWp of 1.22, that is: 113 x 1.22 = 138 kWp of installed photovoltaic power, taking into account the particularity of not exceeding 20% of total losses (with the help of a fogging system for cooling the photovoltaic panels in summer), so the photovoltaic field must have a minimum of 138 kWp, consisting of at least 432 panels of 320 Wp each, mounted on three followers (24) of 144 panels each, distributed in 6 rows of 24 panels.
    Summarizing: in the example of a system according to the invention being considered, a photovoltaic field (24) formed by 432 panels from 320 wp / unit, consisting of 27 series of 16 panels, connected to the direct current bus of an inverter (25 ) of constant torque vector control, drives a motor (26) of 113 kW of permanent magnets, capable of providing a constant torque of 595.2 Nm between 5-60.44 Hz, to drive an oleohydraulic pump (4) that through a hydrostatic transmission (1) provides up to 226 liters of oil per minute at a constant pressure of 300 bar, to drive a cylinder (9) that pushes the piston (16) of 1.6 m in diameter, with 643.3 kN, to a speed of 0.5 / 3 = 0.166 m / s to pump 333 1 / s to 31 mca
    Since it is a question of pumping water that may be charged and not being interested that the possible impurities can be deposited in the area of the piston seals (16) where the sealing is carried out, the double pump design can be adopted, of simple effect, in vertical execution
    To satisfy the wind pumping option, part
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    of the mechanical energy (torque x rpm) captured by the rotor (27) of a wind turbine that, after passing through an epicycloidal multiplier (28), operates the oleohydraulic pump (4) of variable displacement, which gives rise to hydrostatic transmission (one) . The oil-hydraulic power plant (2) is located at the head of a tower, for example at 20 m high, and the B.D.P. (15) is in the water intake, outside the turbine, both connected through long pressure lines (7) and return line (14) of the hydraulic oil, which form the closed circuit that constitutes the hydrostatic transmission (1 ). In order for the turbine to work in isolation from the network, it must be designed to be governed by passive systems, that is, it must be self-tuning and compensated torque, and in any case the maximum power control (blade pitch) It must be governed by oleohydraulic accumulators whose sensors and automaton can work from a battery (12 / 24Vdc) charged by solar panels.
    To ensure that the power captured by the turbine (27) matches the resistance offered by the oil-hydraulic pump (4), it must be displacement
    variable, servo-commanded to send the amount of energy transmitted by the rotor (27) as a constant pressure flow. The control will adjust the
    Rotor speed to be rotated at the ratio A = Vtip / VWind design ± 1 Thus the wind turbine assembly (27) + hydrostatic transmission (1) +
    B.D.P. (15) of water, will be optimal.
    The sizing of the equipment responds to the formula of the
    power captured by the turbine:
    kW = ^ * 5 * CP * A * V3
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    being:
    5 - air density 1.22 Kg / m3 Cp - Power coefficient = 0.44 A - turbined area m2 V - wind speed: 10 ra / s
    Therefore, to capture the 113 kW, an area of 421 m2 is needed, taking into account the non-turbined area in the part of the hub, up to the first section of the aerodynamic profile of the blade, which is in a diameter of 6 m, The section sought will be:
    421 + 28.25 = 449 m2
    equivalent to a rotor (27) of 23.9 m in diameter, so a diameter of 24 m should be adopted.
    To obtain a Cp = 0.44 from a two-rotor rotor (27) in which a relatively good starting torque is desired, an A of design A = 7.5 (VtiP / VWind) must be selected, that is to say that the Blade tip speed at nominal power should be:
    Vtip = 7.5 x 10 = 75 m / s, resulting in a speed of
    60 rpm rotation
    (See Figure 1.10, page 35, of the Innovation in wind Turbine document; Author: Peter Jameison Editorial Wiley)
    corresponding to a torque of:
    N x m = 113 * 9.55 = 17.827 kNm «= 18 kNm
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    This motor torque is transmitted to the epicycloidal multiplier (28) with a transmission ratio that guarantees the correct suction of the oil-hydraulic pump (4) of variable flow. In principle, for the example being described, the P3105 model (Parker Hydraulics p. 5-2-3 catalog HY02-8001 / UK) has been selected, without limitation, this oleohydraulic pump (4) of variable displacement, of up to 105cc / rpm that can aspirate up to 2500 rpm working at a maximum continuous pressure of 320 bar, with a maximum power absorbed by its axis of 150 kW at 2800 rpm.
    To select your work point at maximum displacement and with the help of the graphs on page 5-2-35, an appropriate rotation speed of 2200 rpm is determined to absorb 113kW at 300 bar. Therefore, the ratio of the epicyclic multiplier (28) will be i = 2200/60 = 36.6. It will therefore be a two-stage multiplier (28) model SL4002-36 (Brevini) with a maximum torque of 72 KN input and a transmission ratio i = 36, operating the pump at 60 * 36 = 2160 rpm, with capacity to send by the oil pump to maximum displacement (105 cc / rpm), which will drive the oil hydraulic cylinder (9,) an oil flow of 2160 x 105 x 0.96 = 226.8 1 / minute, which makes the BDP (15) operate as in the case mentioned above (solar 226 1 / minute) with the desired performance of a water flow of 333 1 / s at 31 m.c.a. which will provide the water pump at a piston displacement speed of 0.5 / 3 = 0.166 m / s, when driven through the rod by the hydraulic cylinder
    When the two sources (sun + wind) fully coincide, the B.D.P. (15) will travel at double speed, driving 333 + 333 = 666 1 / s at 31 m.c.a.
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    Thus, it is appreciated that thanks to the flexibility provided by the hydrostatic transmission (1), it allows the design and operation of the B.D.P. (15) through oleohydraulic cylinders (9) capable of transmitting high thrusts with minimal inertia and reduced translation speeds, which guarantees a high performance of the pumping system. The pressure relief valve (5) self-piloted, allows starting without load and also avoid overloading, favoring the operation of the pumping system.
    The sum of these characteristics makes it possible to design and build pumping systems with constant manometric load with clear advantages in its operation and operation compared to other systems of the current technique, with the ability to take advantage of, with high efficiency, the energies from different renewable sources, especially wind and solar.
    When interested, you can count on the energy coming from the network to complement the pumping. In this case, another electric motor (23) of equal power will drive a third oil-hydraulic pump (4) that will add its oil flow at constant pressure, to those provided by the solar field (24) and / or by the wind turbine (27 ), according to the scheme in Figure 5.
    When the three energy sources match, the benefits of the B.D.P. (15) will be maximum, pumping 1 m3 / s at 31 m.c.a., to travel at 0.5 m / s absorbing 113 + 113 + 113 = 339 kW total contributed by the three energy sources.
    Described
    enough
    the
    nature of the
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    invention and its details of operation and dimensioning of its components, it is not considered necessary to broaden its explanation so that any expert in the field understands its scope and the advantages that derive from it, stating that, while preserving its essentiality, the invention it may be carried out in different embodiments that fall within the scope of protection provided by the following claims, and provided that such embodiments do not alter or modify the fundamental principles of the invention.
    权利要求:
    Claims (3)
    [1]
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    1. - PUMP SYSTEM OF PERFORMANCE CONSTANTING ANY RANGE OF POWER, capable of operating with energy from various sources (electrical, solar, wind or combinations thereof), characterized in that it comprises a hydrostatic transmission (1) formed by a oleohydraulic circuit moved from a semi-axial piston oleohydraulic pump (4), operating at constant pressure, drives a double linear displacement pump (15) of large displacement and low inertia, formed by a plunger (16) inside a jacket driven by a rod that has a suction valve (17) and a discharge valve (19), capable of pumping water with low levels of energy at constant performance, designed to work at a constant manometric load, taking advantage of the energy coming from different sources, both individually and jointly, by adding their oil flows in the same pressure manifold (29) for ali ment the 4/2 way distributor valve (8), even at different energy levels, for the operation of the B.D.P. (15) and without needing to hybridize with the power grid.
    [2]
    2. - PUMP SYSTEM OF PERFORMANCE CONSTANTING ANY POWER RANGE, according to claim 1, characterized in that the double linear positive displacement pump (BDP), when working with charged liquids is to say that the water carries impurities, operates in an upright position, ensuring that the flow of flow is continuous through the synchronized combination of the alternative movements of two single acting pistons (16), operated by a single 4/2 way valve (8), as the respective chambers
    on each side of the rod (10) connected by a conduit that allows them to transfer their respective volumes passively from the chamber of an oleohydraulic cylinder by pushing from the other side of the plunger (16) by the pressure of the oleohydraulic circuit, thus achieving the alternation of movements.
    [3]
    3.- PUMP SYSTEM OF CONSTANT PERFORMANCE AT ANY POWER RANGE, according to claims 1 10 and 2, characterized in that it also includes a servo-piloted pressure relief valve (5), located in
    bypass between the oil-hydraulic pump (4) of the oil-hydraulic plant (2) and the non-return valve (6), which is open at the start-up phase of the engines (23 and 26) and therefore allows the engines to start (23 and 26) without load, then closing this pressure relief valve (5) avoiding overloads in them
    refer to the oil-hydroelectric plant (2) any
    increase in unwanted pressure, favoring starting 20 at lower energy levels.
    25
    30
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    同族专利:
    公开号 | 公开日
    ES2679644B1|2019-06-21|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US20030110935A1|2001-12-13|2003-06-19|Nippert Andrew H.|Fluid translating device|
    DE102010044697A1|2010-09-08|2012-03-08|Robert Bosch Gmbh|Hydraulic arrangement for internal combustion engine, comprises valve-controlled displacement unit, which has multiple cylinder-piston units that limit pressure chamber|
    US20120186659A1|2011-01-24|2012-07-26|Purdue Research Foundation|Fluid control valve systems, fluid systems equipped therewith, and methods of using|
    WO2013114437A1|2012-01-31|2013-08-08|Mitsubishi Heavy Industries, Ltd.|Hydraulic transmission comprising variable displacement pump or motor operable with discontinuous range of displacements|
    法律状态:
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    ES201700151A|ES2679644B1|2017-02-24|2017-02-24|Pump system with constant performance at any power range|ES201700151A| ES2679644B1|2017-02-24|2017-02-24|Pump system with constant performance at any power range|
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