• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a circulation lubrication system intended for a fiber web machine. The circulation lubrication system comprises a lubrication circuit (17) containing a lubricating oil supply line (15) and a lubricating oil return line (16). In the lubrication circuit (17), a lubrication point (10) and a control device (18) for controlling the lubricating oil flow rate are arranged. Further, in the lubricating circuit (17), a temperature element (19) is arranged, which is connected to the control device (18) for controlling the lubricating oil flow rate on the basis of the temperature. The temperature element (19) operates without auxiliary power.
    公开号:AT14194U1
    申请号:TGM109/2014U
    申请日:2014-03-13
    公开日:2015-05-15
    发明作者:Simo Horsma-Aho；Kari Holopainen；Hannu Hyvönen
    申请人:Metso Paper Inc；
    IPC主号:
    专利说明:

    description
    CIRCULAR WIPER SYSTEM FOR A FIBERMAKING MACHINE
    The invention relates to a designated for a fiber web circulation lubrication system comprising a lubricating oil supply line and a lubricating oil return line comprising lubrication circuit, in which [0002] - a lubrication point, [0003] - a control device for controlling the lubricating oil flow rate and [0004] a temperature element used to control the lubricating oil flow rate on the basis of
    Temperature is connected to the control device, [0005] are arranged.
    In fiber web machines large rollers and cylinders are used, have their LagerUmlaufschmierung. Hundreds of individual lubrication points may be present in a fiber web machine. For example, in a rolling bearing, the thickness of the lubricating film formed by the oil is determined mainly by the rolling speed of the bearing rollers, the load and the oil viscosity. In practice, one can regulate the thickness of the lubricating film only by changing the oil viscosity, because the rolling speed and the load during production remain essentially unchanged. Above all, the oil has an effect on the viscosity. In circulation lubrication, most of the oil flow is needed to cool the bearing and only a small part to form the actual lubricating film.
    If the bearing is cold, for example, after a fiber web machine standstill, so a very small Oldurchsatz to form the lubricating film. In the known fiber web machines, the oil flow to be supplied to the bearings is regulated by a device belonging to the circulation lubrication system. This device may, for example, consist of a rotameter or an oval wheel knife in which the control of the oil flow rate is based on a needle valve to be manually adjusted. The flow rate at the lubrication point is set to its nominal value, which is determined according to the production rate under maximum load and temperature.
    The viscosity of the oil increases exponentially with decreasing temperature. By increasing the viscosity, the flow resistance increases in the flow channels of the bearing housing and in the return line. The needle valve works like a throttle and does not respond to viscosity changes. In practice, the oil flow rate remains almost constant despite the change in viscosity. When cold starting occur as a problem oil leaks through the non-looping labyrinth seals of the bearing housings of the rollers through it. This problem is particularly evident in some older fiber web machines. On the other hand, in the new fiber web machines, the amounts of oil in the rotary lubrication have increased due to the increased production speeds. The problem with the prior art has been alleviated by reducing the pressure in the recirculating lubrication system when the oil returning to the oil tank is cold. With this method, however, the problem can not be adequately compensated, because the roller gears are connected to the same supply line as the roller bearings and because of the function of these transmissions no lower forward pressure can be used at speeds above the creeping speed.
    The problem was also addressed by equipping the circulation lubricating system with more intelligence. Each lubrication point was assigned as temperature element a sensor including its electronics and a control device including actuator. In practice, the electronics control the actuator with which the control device is actuated by means of the values measured with the electronic sensor and the return oil. The flow of oil to the bearing can be controlled as a function of the temperature. However, the sensors, electronics and actuators increase costs. In addition, the electronics and the actuators must have very well protected wiring, although the oil piping can be simplified. In addition, the hot spots require special electronics or at least encapsulation and even cooling. Such a circulation lubrication system is described in Finnish Patent FI123370.
    It is therefore an object of the invention to provide a novel recirculating lubrication system for fibrous web machines which is simpler compared to heretofore but governed by changes in operating conditions. Characteristic of this invention is that the temperature element is self-acting, i. works without auxiliary power. This avoids various actuators and cabling. At the same time, the circulation lubrication of the individual lubrication points can be regulated separately. Furthermore, the circulation lubrication system automatically adjusts to the different temperatures. As a result, appropriate lubrication and cooling of the lubricating point are achieved in the different situations.
    In the following the invention with reference to the accompanying, some Ausfüh¬rungsformen of the invention showing drawings will be described in detail.
    [0013] FIG. 1 a shows a general illustration of the circulatory lubrication system of a fiber web machine; [0014] FIG. 1b shows the fiber web machine circulation lubrication system according to the invention in principle; Fig. 2 is a single belonging to the circulation lubrication system of a fiber web machine
    Lubrication point viewed in the machine direction; FIG. 3 shows a partial enlargement from FIG. 2. FIG.
    1a shows a general representation of the circulating lubrication system of a fiber web machine, more precisely a part thereof in connection with a single Schmierstelle. As an example of application here is a bearing of a fiber web machine roller, which forms the lubrication point 10. The roller is rotatably supported via bearings arranged at its two ends. The bearing is a roller bearing 11 in which the rolling bodies 14 are arranged between outer ring 12 and inner ring 13. Between the opposing surfaces must, so that the camp is working properly, a ausrei¬chender lubricating film can be formed. Besides lubricating, the lubricating oil also cools and cleans the bearing.
    In the circulation lubrication oil is used, which is fed to the individual Schmier¬stellen. Usually there are one or more oil tanks in the basement of the fiber web machine, from which lubricating oil is conveyed via pipelines. In conjunction with the oil tank filters are arranged and there are cooling of the oil and Wasserabscheidung.Das lubricating oil is thus freed of impurities and water and so remains suitable for a long period of use and the lubrication point remains functional. For example, large warehouses are supplied with several liters of oil per hour and the oil tank has a capacity of up to several cubic meters.
    In Fig. 1a, the above-mentioned oil tank as well as the various pumps and lines including their regulators and gauges are omitted; The drawings are therefore limited to the nearer environment of the lubrication point. Generally speaking, the circulation lubrication system comprises a lubrication circuit 17 (FIG. 1a) having a lubricating oil supply line 15 and a lubricating oil return line 16. Lubricating oil is fed into the supply line, which flows via the lubrication point into the return line and back into the oil tank. In the lubrication circuit 17, the lubrication point 10 and a control device 18 for controlling the lubricating oil flow rate are inserted (FIG. 1b). In this way, the lubrication point is supplied with the intended amount of lubricating oil. Furthermore, the lubrication circuit 17 comprises a temperature element 19, which is connected to the control device 18 and serves to regulate the lubricating oil throughput on the basis of the temperature. Here, the lubrication point inflowing
    Lubricating oil quantity changes depending on the temperature, so that for example occurring in the prior art leakage problems can be avoided, but on the other hand sufficient lubrication and cooling of the lubrication point are guaranteed. According to the invention, the temperature element 19 operates automatically, ie without auxiliary energy. At this time, for example, the stepper motors that operate the control device are eliminated. In addition, the temperature element itself is electrically passive, thus eliminating the need for separate cabling and control electronics.
    In Fig. 1b, the lubrication circuit 17 is shown in the vicinity of the control device 18 in principle. Here, the temperature element 19 in the return line 16, the control device 18 in the flow line 15 is arranged. The temperature element 19 now responds to the oil flow in the return line 16, which has heated at the lubrication point 10. The temperature of the lubricating oil is increased both by the hot location of the lubrication point and by the shearing forces in the lubricating film. At the same time, the control device 18 can regulate the oil flow flowing to the lubricating point 10 directly. In Fig. 1b, the return line 16 is represented by a thick solid line, the supply line 15 by a thin dashed line darge.
    Preferably, the temperature element 19 forms part of the control device 18. This ensures a small size and trouble-free operation. Surprisingly, a functional entity can be made from only two components, or even by the formation of a novel self-regulating device having both temperature element and regulator functionalities. In Fig. 1b, this entirety is shown in principle darge and occupied by the reference numeral 20.
    The novel control element is compact and simple in construction, because the Temperaturele¬ment 19 is now mechanically coupled to the control device 18. In other words: dieselbsttätige rule movement is transmitted directly to the control device. In Fig. 1b, the axis 21 is shown, which is attached to the temperature element 19 belonging to the heat element 22 and the control device 18 belonging to the throttle 23. The throttle may for example consist of a linear (movement) valve. The heat element 22 responds to the temperature of the oil flow in the return line 16 and converts the resulting movement into a movement of the throttle 23. The control element works fully automatically and without external energy, which simplifies the construction of the lubrication circuit and reduces the susceptibility to failure. Generally speaking, the control device may consist of valves or throttles of various types individually or in a group. The control element can be formed as a block, through which the oil flows are passed. The block has its own holes for various equipment. In addition, a plurality of regulating valves may be present in the block, for example such that one of them serves as the actual regulating valve and two others are provided for the upper and lower limits of the oil flow. Also possible bypass valves may be present. The temperature element associated with the rule member is also integrated into the block.
    When dimensioning the various components whose mutual Zu¬sammenwirkung is taken into account. This ensures that in a certain temperature range, the lubricating oil control works as intended. Of course, the control device 18 may include a fine controller 24 for controlling its temperature equivalent. The fine regulator may for example consist of an adjusting spindle 25, which is arranged on the aforementioned axis 21. The adjusting spindle serves to regulate the mutual cooperation of the Wärmeele¬ments and the throttle. The control element can then be fine adjusted to suit the individual lubrication points. The adjusting spindle 25 is manually operated via a finger wheel 26 here. In addition, the throttle can be provided with its own setting, with the Durch¬satzbereich the control device is set.
    Thus, the same control element can be set up for different temperature ranges as well as for different throughput ranges. However, the physical size of the governor may vary depending on the application.
    In the case of an electrically passive control element, for example, the machine control system of the fiber web machine receives no information about the return oil temperature. Nevertheless, the temperature element 19 may have a thermometer 27. If you then go to the lubrication point, ie on site, you can determine the temperature of the oil flow in the return line with sufficient accuracy. The control element can be provided with an adjustable control stop. Then, the same control element can be adjusted in many ways for different Betriebsbe¬dingungen. Further, the control member may be equipped with a valve position indicator, from the position of the oil flow is apparent.
    In any case, the modern fiber web machine has a developed machine control system with which the operation of the machine can be monitored and controlled. The lubricating circuit 17 can thus comprise an electronic temperature sensor 29 (FIG. 1b). Then, the autonomous function of the control element can be monitored by the machine control system and, if a malfunction or something else abnormal is detected, the lubrication point can be inspected if necessary. For example, in the event of damage to the greasing site, the governor may not enhance cooling by increasing the flow of oil beyond the control window. In this case, the damage situation can be determined with the machine control system as the temperature continues to increase. On the other hand, the temperature element and also the control element can become defective, which can be determined with an additional temperature sensor.
    In principle, the temperature element can be incorporated into any existing return line. In this case, however, the control element must be dimensioned taking into account the return line, which usually has a larger diameter than the feed line (FIG. 2). Thus, the return line 16 preferably includes a partial flow channel 30 in that the temperature element 19 is arranged. Even at low oil flow rates, a sufficient flow of oil will always flow through the temperature element at all flow rates. The temperature element then reacts quickly and accurately to changes in the lubricating oil temperature. At the same time, the control element can be installed without problems and without major changes to the lubrication circuit between the flow line and the return line.
    Fig. 2 shows an advantageous embodiment in which a single rolling bearing 11 of a fiber web machine forms the lubrication point 10. Because of its high load and hot position, this lubrication point is classified as demanding. Now, the electronic control device can be used indefinitely even within the hood of the dryer section and also there works the control device without electronic components and separate Wiring properly.
    The rolling bearing 11 in Fig. 2 is a spherical roller bearing, which is arranged on the shaft 31. The spherical roller bearing has two rows of rollers. In the supported on the bearing housing 32 outer ring 12 a common spherical roller track is formed. Accordingly, on the shaft 31 arranged inner ring 13 is formed for each row of rollers own career. The spherical roller bearing is able to absorb radial loads in addition to radial loads in both directions and also tolerates angular errors of the shaft. The lubricating oil is directed here between the rows of rollers from where it spreads to the surfaces of the bearing. The lubricating oil collects in the lower part of the bearing housing 32, to which the return line 16 is connected. The return generally takes place on Schwerkraftba¬sis, which is why the return line must have a sufficiently large diameter. Non-abrasive labyrinth seals 33, which have a long service life, are arranged at the connection point between shaft 31 and bearing housing 32. In normal conditions, the lubricating oil level in the bearing housing is below the labyrinth seals. As a result, oil leakage through the labyrinth seals are avoided.
    The arrangement of Fig. 2 is excellent for retrofitting without dabeigößere modifications would be required. On the other hand, with proper planning, the regulating device 18 and the temperature element 19 can be integrated into the bearing housing 32 of the roller bearing 11 (not shown). As a result, the structure of the lubrication circuit further simplifies at the same time less risk of damage, since then the various components are protected in the bearing housing. The temperature element is arranged in connection with the return oil.
    In the invention, various functionalities are combined into a novel regulatory organ. If, for example, a bearing of a fiber web machine roller and thus also the lubricating oil in the return line is cold, the oil flow directed towards the bearing is throttled "individually" by the separate control element. The control element (ROH) is direct acting and therefore requires neither power supply nor separate control. With increasing peripheral speed of the bearing and at the same time increasing heating of the outgoing from the Lagergehäu¬se lubricating oil regulates the control element on the basis of the temperature of the outgoing oil. The bearing is then supplied with more lubricating oil, which ensures adequate lubrication and cooling.
    3 shows a more detailed representation of the control element 20 according to the invention. The heat element 22 here consists of a wax cartridge whose structure and external dimensions change as a function of the temperature. The heat element 22 is connected via an axis 21 to the throttle 23, which regulates the lubrication point flowing lubricating oil flow. The temperature dependence of the control element can be regulated with a finger wheel 26. The correct setting of the temperature is done manually with the above-mentioned finger wheel during normal operation on the basis of the return oil temperature measurement. The throttle never closes completely, but ensures a minimum flow even when cold. This minimum flow is sufficient for lubrication during machine downtime and crawl travel.
    The control device can be installed at an existing lubrication point or in the pipeline leading there. Also, the control element can be connected in series with a flow meter. With the flow measurement can then be monitored whether the Regelor¬gan works as desired. With the circulation lubrication system according to the invention, the lubrication situation can be controlled even better than before in all operating situations. With suitable oil throughput, the accumulation of excess lubricating oil at the lubrication point is avoided. This reduces the friction losses in the bearing and this means energy savings. At the same time, oil leaks are avoided. The elimination of elektroni¬scher actuators and control members simplifies the construction of the circulation lubrication system. Also, the lubrication situation can be followed by separate temperature measurement of coming from the lubrication point concerned return oil. The separate temperature sensor can thus be used for condition monitoring of the lubrication point. The function of the regulator is based on lubrication point characteristics, lubricating oil flow rate and lubricating oil temperature, as well as production parameters of the fiber web machine. In the embodiment described here, the lubrication point consists of a roller bearing, but it can also be a plain bearing or a gearbox, the lubrication and cooling requiring Lagerbau¬ groups and (tooth) interventions, be.
    权利要求:
    Claims (10)
    [1]
    Claims 1. A circulation lubrication system for a fiber web machine comprising a lubricating circuit (17) containing a lubricating oil feed line (15) and a lubricating oil return line (16), in which - a lubricating point (10), - a regulating device (18 ) for controlling the lubricating oil flow rate, and - a temperature element (19) connected to the control device (18) for controlling the lubricating oil flow rate based on the temperature, characterized in that the temperature element (19) is self-actuating.
    [2]
    2. System according to claim 1, characterized in that the temperature element (19) in the return line (16) is arranged while the control device (18) in the flow line (15) is arranged.
    [3]
    3. System according to claim 1 or 2, characterized in that the temperature element (19) as a part of the control device (18) is formed.
    [4]
    4. System according to claim 3, characterized in that the temperature element (19) is mechanically coupled to the control device (18).
    [5]
    5. System according to any one of claims 1 to 4, characterized in that the temperature element includes a sensor-observable thermometer (27).
    [6]
    6. System according to any one of claims 1 to 5, characterized in that to the control device (18) includes a fine regulator (24) for adjusting the Temperaturentspre¬chung the control device (18).
    [7]
    7. System according to any one of claims 1 to 6, characterized in that the return line (16) a Teilströmungskanal (30) belongs, on which the Temperatu¬relement (19) is arranged.
    [8]
    8. System according to any one of claims 1 to 7, characterized in that the lubrication point (10) consists of a single roller bearing (11) of the fiber web machine be¬steht.
    [9]
    9. System according to any one of claims 1 to 8, characterized in that the control device (18) and the temperature element (19) are integrated into the bearing housing (32) belonging to the rolling bearing (11).
    [10]
    A system according to any one of claims 1 to 9, characterized in that the lubricating circuit (17) includes an electronic temperature sensor (29). For this 3 sheets of drawings
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    同族专利:
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    引用文献:
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    DE1023598B|1954-10-18|1958-01-30|Bayer Ag|Sight glass|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    FI20135399A|FI125809B|2013-04-19|2013-04-19|Circulation lubrication system for a fiber web machine|
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