• 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 centrifugal refrigerating compressor (2) comprises a hermetic housing (3); a drive shaft (4) having a first axial end portion (5), a second axial end portion (6) and an intermediate portion (7), the drive shaft (4) further comprising a central axial bore (8); first and second compression stages (9, 11) respectively having first and second wheels (16, 17) connected to the first axial end portion (5) of the drive shaft (4); an electric motor (19) configured to rotate the drive shaft (4) and having a stator and a rotor, the rotor being connected to the second axial end portion of the drive shaft (4) ; a fixed shaft member attached to the hermetic housing (3) and extending partially into the central axial bore (8) of the drive shaft (4); and a radial bearing arrangement configured to rotatably support the drive shaft (4), the radial bearing arrangement being arranged between an outer surface of the stationary shaft member and an inner surface of the drive shaft. training (4).
    公开号:FR3037110A1
    申请号:FR1555134
    申请日:2015-06-05
    公开日:2016-12-09
    发明作者:Yves Rosson；Patrice Bonnefoi
    申请人:Danfoss Commercial Compressors SA；
    IPC主号:
    专利说明:

    [0001] FIELD OF THE INVENTION The present invention relates to a centrifugal refrigerating compressor, and in particular to a two-stage centrifugal refrigerating compressor. BACKGROUND OF THE INVENTION US7240515 discloses a dual centrifugal refrigerating compressor comprising in particular: - a hermetic housing, - an electric motor having a stator and a rotor shaft, the rotor shaft having a first end portion axial, a second axial end portion, and an intermediate portion configured to be rotated by the stator; first and second centrifugal refrigerators each having first and second compression stages configured to compress a refrigerant; first and second compression stages of the first centrifugal refrigerating compressor having first and second wheels connected to the first axial end portion of the rotor shaft, the first and second compression stages of the second centrifugal refrigerating compressor having first and second second spinning wheels connected to the second part of e axial end of the rotor shaft, and a radial magnetic bearing assembly configured to rotatably support the rotor shaft. In order to limit the axial length of each of the first and second centrifugal refrigeration compressors, the first and second wheels of each of the first and second centrifugal refrigeration compressors are arranged close to each other. However, the configuration of the electric motor and the radial magnetic bearing assembly further reduces the axial length of the centrifugal refrigerant compressor. In addition, due to the configuration of the electric motor, and in particular of the rotor shaft, the mass of the rotating parts is high, which complicates the balancing of the centrifugal refrigerating compressor, and which could therefore adversely affect the performance and the reliability of the compressor.
    [0002] SUMMARY OF THE INVENTION An object of the present invention is to provide a centrifugal refrigeration compressor which can overcome the disadvantages encountered with conventional centrifugal refrigeration compressors. Another object of the present invention is to provide a compact centrifugal refrigeration compressor which can be easily balanced. According to the invention, such a centrifugal refrigerating compressor comprises: - a hermetic housing, - a drive shaft comprising a first axial end portion, a second axial end portion and an intermediate portion arranged between the first and second parts axial end, the drive shaft having a central axial bore extending along at least a portion of the length of the drive shaft; first and second compression stages configured to compress a refrigerant, the first and second compression stages respectively comprising first and second wheels, the first and second wheels being connected to the first axial end portion of the drive shaft, - an electric motor configured to drive in rotation the drive shaft about an axis of rotation, the electric motor having a stator and a rotor, the rotor being connected to the an axial end portion of the drive shaft; a fixed shaft member fixed to the hermetic housing and extending at least partially in the central axial bore of the drive shaft; and an arrangement radial bearing arrangement configured to rotatably support the drive shaft, the radial bearing arrangement being configured to cooperate with an outer surface of the stationary shaft member. The configuration of the drive shaft and the fixed shaft member reduces the weight of the rotating parts, which limits the vibrations generated by the centrifugal refrigeration compressor, and facilitates the balancing thereof. In addition, the configuration of the radial bearing arrangement between the stationary shaft member and the drive shaft, i.e. inside the drive shaft, allows arranging the electric motor near the first and second compression stages, and thus reducing the total axial length of the centrifugal refrigerating compressor.
    [0003] The centrifugal refrigerating compressor may also include one or more of the following features, taken alone or in combination. According to one embodiment of the invention, the radial bearing arrangement comprises at least one radial bearing extending along at least a portion of an inner surface of the rotor. According to one embodiment of the invention, the radial bearing arrangement comprises at least one radial bearing extending along at least a portion of at least one of the first and second wheels. According to one embodiment of the invention, the radial bearing arrangement comprises at least one radial bearing extending along at least a portion of an inner surface of the rotor, along the shaft of the rotor. driving and along at least a portion of at least one of the first and second wheels. According to one embodiment of the invention, the radial bearing arrangement is arranged between an outer surface of the stationary shaft member and an inner surface of the drive shaft. According to one embodiment of the invention, the radial bearing arrangement comprises at least one radial bearing arranged between the outer surface of the stationary shaft member and the inner surface of the drive shaft. The radial bearing may be a plain bearing.
    [0004] According to one embodiment of the invention, the radial bearing extends along at least a portion of the second axial end portion and / or at least a portion of the intermediate portion of the shaft. drive. According to one embodiment of the invention, the radial bearing arrangement is arranged inside the central axial bore of the drive shaft.
    [0005] According to one embodiment of the invention, the radial bearing arrangement comprises a plurality of radial bearings distributed along the axial length of the stationary shaft member. According to one embodiment of the invention, the centrifugal refrigerating compressor further comprises a thrust bearing arrangement configured to limit axial movement of the drive shaft during operation, the thrust bearing arrangement comprising a thrust bearing element arranged on the outer surface of the intermediate portion of the drive shaft. According to one embodiment of the invention, the thrust bearing arrangement is a fluid thrust bearing arrangement, and for example a thrust bearing arrangement. Therefore, a compressed fluid, such as compressed, intermediate or high pressure gas is delivered to a space provided between the corresponding adjacent bearing surfaces of the thrust bearing arrangement. Hereby, the use of a lubricating oil and the problems associated with the oil supply, the oil temperature or the oil circulation in the refrigerant compression can be avoided. According to one embodiment of the invention, the thrust bearing element extends radially outwardly relative to the intermediate portion of the drive shaft. According to one embodiment of the invention, the thrust bearing element 10 is annular. According to one embodiment of the invention, the thrust bearing element is formed in one piece with the drive shaft. According to one embodiment of the invention, the thrust bearing member has a first thrust bearing surface and a second thrust bearing surface opposite to the first thrust bearing surface. According to one embodiment of the invention, the first abutment bearing surface of the abutment bearing element is configured to cooperate with a first abutment bearing surface defined by a first abutment bearing element connected to the hermetic housing. and the second abutment bearing surface of the abutment bearing member is configured to cooperate with a second abutment bearing surface defined by a second abutment bearing member connected to the hermetic housing. According to one embodiment of the invention, the first and second abutment bearing elements are annular.
    [0006] According to one embodiment of the invention, the thrust bearing element is located between the electric motor and the first compression stage. According to one embodiment of the invention, the central axial bore of the drive shaft extends over the entire length of the drive shaft, and the rotor has a central axial passage extending over any the length of the rotor, the fixed shaft member extending into and along the central axial bore and the central axial passage and having a first end portion and a second end portion connected thereto; respectively to the hermetic housing. According to one embodiment of the invention, the fixed shaft member is supported cantilever with respect to the hermetic housing. According to one embodiment of the invention, the stationary shaft member is connected to the hermetic housing near the first axial end portion of the drive shaft. According to another embodiment of the invention, the stationary shaft member is connected to the hermetic housing near the second axial end portion of the drive shaft. According to one embodiment of the invention, the axial bore of the drive shaft extends along at least the first axial end portion and the intermediate portion of the drive shaft. According to one embodiment of the invention, the axial bore of the drive shaft extends along at least the intermediate portion and the second axial end portion of the drive shaft. According to said embodiment of the invention, the rotor may also comprise a central axial passage extending over the entire length of the rotor. According to one embodiment of the invention, the radial bearing arrangement is a radial fluid bearing arrangement, and for example a radial gas bearing arrangement. Thus, the use of a lubricating oil for the lubrication of the radial bearing arrangement and the problems associated with the oil supply, the oil temperature or the oil circulation in the refrigerant compression can to be avoided. According to one embodiment of the invention, the centrifugal refrigerating compressor is configured such that at least a portion of the refrigerant compressed in the first and second compression stages is used as a lubricating fluid in the radial bearing arrangement. fluid and / or the fluid thrust bearing arrangement. According to said embodiment of the invention, the centrifugal refrigerating compressor can be considered as a single-fluid compressor. This configuration of the centrifugal refrigerant compressor avoids a separate supply of lubricating fluid and thus reduces costs. According to one embodiment of the invention, the first and second wheels are arranged in a back-to-back configuration. According to one embodiment of the invention, the first and second wheels are formed integrally with the drive shaft. According to another embodiment of the invention, the first and second wheels are provided on a wheel element fixed to the first axial end portion of the drive shaft. According to one embodiment of the invention, each of the first and second compression stages comprises a front side equipped with a plurality of blades configured to accelerate, during the rotation of the drive shaft 3037110 6, the fluid refrigerant entering the respective compression stage and to deliver the accelerated refrigerant to a diffuser arranged at the radial outer edge of the respective impeller. According to one embodiment of the invention, each of the first and second compression stages comprises a fluid inlet and a fluid outlet, the fluid outlet of the first compression stage being fluidly connected to the fluid inlet. the second compression stage. According to one embodiment of the invention, the hermetic housing comprises a low pressure chamber located upstream of the first compression stage, and a high pressure chamber located downstream of the second compression stage, the electric motor being arranged in the chamber. low pressure. According to one embodiment of the invention, the thrust bearing arrangement and / or the radial bearing arrangement are arranged in the low pressure chamber. According to one embodiment of the invention, the hermetic housing further comprises an intermediate pressure chamber provided between the fluid outlet of the first compression stage and the fluid inlet of the second compression stage.
    [0007] According to one embodiment of the invention, the stationary shaft member is a stepped stationary shaft member, and has an outer diameter that varies along the axial length of the stationary shaft member. According to one embodiment of the invention, the fixed shaft member and / or the drive shaft are made of high-strength steel, of ceramic materials, or combinations thereof. According to one embodiment of the invention, the fixed shaft member extends substantially parallel to the drive shaft. According to one embodiment of the invention, the centrifugal refrigerating compressor further comprises a connecting sleeve configured to rotate the rotor and the second axial end portion of the drive shaft. According to one embodiment of the invention, the connection sleeve at least partially surrounds the rotor and at least partially the second axial end portion of the drive shaft. The connecting sleeve may completely surround the second axial end portion 3037110 7 of the drive shaft, and may also at least partially surround the intermediate portion of the drive shaft. According to one embodiment of the invention, the centrifugal refrigerating compressor further comprises a spacer element located between the drive shaft and the rotor. According to one embodiment of the invention, the connecting sleeve has an end located near the thrust bearing element, and for example abutting against the thrust bearing element. According to one embodiment of the invention, the connecting sleeve can be formed integrally with the drive shaft. These and other advantages will become apparent on reading the following description with reference to the drawing attached thereto showing, by way of nonlimiting examples, embodiments of the centrifugal refrigerating compressor according to the invention.
    [0008] BRIEF DESCRIPTION OF THE DRAWINGS The following detailed description of several embodiments of the invention will be better understood when read in conjunction with the accompanying drawings, it being understood, however, that the invention is not limited to the embodiment of the invention. specific described. Figure 1 is a longitudinal sectional view of a centrifugal refrigerant compressor according to a first embodiment of the invention. Figure 2 is a longitudinal sectional view of a centrifugal refrigerating compressor according to a second embodiment of the invention. Figure 3 is a longitudinal sectional view of a centrifugal refrigerant compressor according to a third embodiment of the invention. Figure 4 is a longitudinal sectional view of a centrifugal refrigerant compressor according to a fourth embodiment of the invention.
    [0009] Figure 5 is a longitudinal sectional view of a centrifugal refrigerant compressor according to a fifth embodiment of the invention. Figure 6 is a longitudinal sectional view of a centrifugal refrigerant compressor according to a sixth embodiment of the invention. Figure 7 is a longitudinal sectional view of a centrifugal refrigerating compressor according to a seventh embodiment of the invention.
    [0010] Figure 8 is a longitudinal sectional view of a centrifugal refrigerant compressor according to an eighth embodiment of the invention. DETAILED DESCRIPTION OF THE INVENTION FIG. 1 represents a centrifugal refrigerating compressor 2, in particular a two-stage centrifugal refrigerating compressor. The centrifugal refrigerating compressor 2 comprises a hermetic housing 3, and a drive shaft 4 rotatably disposed within the hermetic housing 3 and extending along a longitudinal axis A. The drive shaft 4 comprises a first axial end portion 5, a second axial end portion 6 opposite the first axial end portion 5, and an intermediate portion 7 arranged between the first and second axial end portions 5, 6. Drive shaft 4 may be made of high strength steel, ceramic materials, or combinations thereof. According to the embodiment shown in Figure 1, the drive shaft has a central axial bore 8 extending over the entire length of the drive shaft 4. The centrifugal refrigerant compressor 2 further comprises a first 20 compression stage 9 and a second compression stage 11 configured to compress a refrigerant. The first compression stage 9 comprises a fluid inlet 12 and a fluid outlet 13, while the second compression stage 11 comprises a fluid inlet 14 and a fluid outlet 15, the fluid outlet 13 of the first compression stage 9 25 being fluidly connected to the fluid inlet 14 of the second compression stage 11. The hermetic housing 3 thus comprises a low pressure chamber located upstream of the first compression stage 9, a high pressure chamber located downstream of the second compression stage 9 compression stage 11, and an intermediate pressure chamber 30 provided between the fluid outlet 13 of the first compression stage 9 and the fluid inlet 14 of the second compression stage 11. The first and second compression stages 9, 11 comprise respectively a first wheel 16 and a second wheel 17. The first and second wheel 16, 17 are connected to the first axial end portion 5 of the drive shaft. 4. According to the embodiment shown in Fig. 3037110 9 1, the first and second wheels 16, 17 are provided on a wheel element 18 attached to the first axial end portion 5 of the drive shaft 4. However, according to another embodiment of the invention, the first and second wheels 16, 17 can be formed integrally with the drive shaft 4. The first and second wheels 16, 17 are arranged in a back-to-back configuration, so that the fluid flow directions at the flow inlet 12, 14 of the first and second compression stages 9, 11 are opposed to each other.
    [0011] Each of the first and second wheels 16, 17 has a front side equipped with a plurality of vanes configured to accelerate, during rotation of the drive shaft 4, the refrigerant entering the respective one of the first stages. and second compression stages 9, 11, and for delivering the accelerated refrigerant to a diffuser arranged at the radial outer edge of the respective wheel of the first and second wheels 16, 17. The centrifugal refrigerating compressor 2 comprises an electric motor 19 configured to rotate the drive shaft 4 about the longitudinal axis A of the drive shaft 4. The electric motor 19 comprises a stator 21 and a rotor 22. The electric motor is arranged in the chamber 20 Low pressure defined by the hermetic housing 3. According to the embodiment shown in Figure 1, the rotor 22 has a central axial passage 23 extending over the entire length The rotor 22 is connected to the second axial end portion 6 of the drive shaft 4. For this purpose, the centrifugal refrigerant compressor 2 has a connecting sleeve 24 configured to connect the rotor in rotation. 22 and the second axial end portion 6 of the drive shaft 4. The drive shaft 4 and the rotor 22 can for example be firmly adjusted, as adjusted with tightening, inside the sleeve The connecting sleeve 24 can also be heat-shrinkably adjusted to the drive shaft 4 and to the rotor 22. According to the embodiment shown in FIG. 1, the connection sleeve 24 completely surrounds the rotor. 22 and the second axial end portion 6 of the drive shaft 4. The connecting sleeve 24 can also at least partially surround the intermediate portion 7 of the drive shaft 4.
    [0012] The centrifugal refrigerating compressor 2 comprises a stationary shaft element 26 fixed to the hermetic housing 3 and extending coaxially to the drive shaft 4. The stationary shaft element 26 can be made of high-strength steel, of ceramic materials, or combinations thereof.
    [0013] The stationary shaft member 26 may be stepped, and may have an outer diameter that varies along the axial length of the stationary shaft member 26, or may have a substantially constant cross section along its entire length. . According to the embodiment shown in FIG. 1, the fixed shaft element 26 extends in the axial bore 8 of the drive shaft 4 and the axial passage 23 of the rotor 22 and along those and has a first end portion 26a and a second end portion 26b respectively connected to the hermetic housing 3. The centrifugal refrigeration compressor 2 has a radial bearing arrangement configured to rotatably support the drive shaft 4.
    [0014] The radial bearing arrangement comprises a radial bearing 27, such as a radial plain bearing, arranged inside the axial bore 8 of the drive shaft 4 and between the outer surface of the radial element. fixed shaft 26 and the inner surface of the drive shaft 4. The radial bearing 27 may be a radial fluid bearing, and for example a radial gas bearing. According to the embodiment shown in Figure 1, the radial bearing 27 extends along the second axial end portion 6 and along a portion of the intermediate portion 7 of the drive shaft 4 It should be noted, however, that the radial bearing arrangement may include a plurality of radial bearings distributed along the axial length of the stationary shaft member 26.
    [0015] The centrifugal refrigerant compressor 2 further comprises a thrust bearing arrangement arranged in the low pressure chamber and configured to limit axial movement of the drive shaft 4 during operation. The thrust bearing arrangement may be a fluid thrust bearing arrangement, and for example a thrust bearing arrangement. The thrust bearing arrangement comprises an annular abutment bearing element 28 arranged on the outer surface of the intermediate portion 7 of the drive shaft 7, and located between the electric motor 19 and the first compression stage 9. The abutment bearing element 28 may be formed integrally with the drive shaft 4, or may be attached thereto. It should be noted that an end portion of the connecting sleeve 24 may be located near the abutment bearing element 28, and may for example abut against the thrust bearing element 28. the thrust bearing member 28 extends radially outwardly relative to the intermediate portion 7 of the drive shaft 4, and has a first thrust bearing surface 29 and a second thrust bearing surface. 31 opposite the first abutment bearing surface 29. The first abutment bearing surface 29 of the abutment bearing member 28 is configured to cooperate with a first abutment bearing surface defined by a first abutment bearing member annular 32 connected to the sealed housing 3, while the second abutment bearing surface 31 of the abutment bearing member 28 is configured to cooperate with a second annular abutment bearing surface defined by a second In one embodiment of the invention, the centrifugal refrigerating compressor 2 is configured so that a portion of the refrigerant compressed by the first and second compression stages 9 It is used as a lubricating fluid in the radial fluid bearing arrangement and the fluid thrust bearing arrangement. Fig. 2 shows a centrifugal refrigerant compressor 2 according to a second embodiment of the invention which differs from the first embodiment shown in Fig. 1 essentially in that the stationary shaft member 26 is cantilevered relative to the hermetic housing 3 and the first end portion 26a of the stationary shaft member 26 is connected to the hermetic housing 3. According to said second embodiment, the rotor 26 is devoid of axial passage. 3 represents a centrifugal refrigerating compressor 2 according to a third embodiment of the invention which differs from the first embodiment shown in FIG. 1 essentially in that the fixed shaft element 26 is supported cantilevered by relative to the hermetic housing 3 30 and the second end portion 26b of the stationary shaft member 26 is connected to the hermetic housing 3. Fig. 4 shows a centrifugal refrigerant compressor 2 according to a fourth embodiment of the invention which differs from the first embodiment shown in FIG. 1 essentially in that the radial bearing arrangement comprises a first radial bearing 27a extending along the first and second wheels 16, 17 and the first axial end portion. 3037110 12 of the drive shaft 4, and a second radial bearing 27b extending along the inner surface of the rotor 22. According to said fourth mode of re In the embodiment of the invention, the impeller element 18 is connected to the drive shaft 4 by means of the radial bearing arrangement, and more particularly by means of the first radial bearing 27a. For example, the impeller member 18 and the drive shaft 4 can be firmly fitted to the first radial bearing 27a. Figure 5 shows a centrifugal refrigerant compressor 2 according to a fifth embodiment of the invention which differs from the fourth embodiment shown in Figure 4 essentially in that the radial bearing 27 extends along the first and second wheels 16, 17, and over the entire axial length of the drive shaft 4 and the rotor 22. Figure 6 shows a centrifugal refrigerant compressor 2 according to a sixth embodiment of the invention which differs from the third embodiment. shown in Figure 3 essentially in that the radial bearing 27 extends along the first wheel 16, and over the entire axial length of the drive shaft 4 and 22 of the rotor. Fig. 7 shows a centrifugal refrigerant compressor 2 according to a seventh embodiment of the invention which differs from the sixth embodiment shown in Fig. 6 essentially in that the radial bearing arrangement comprises a first radial bearing 27a. extending along the first wheel 16 and the first axial end portion 5 of the drive shaft 4, and a second radial bearing 27b extending along the inner surface of the rotor 22.
    [0016] Fig. 8 shows a centrifugal refrigerant compressor 2 according to an eighth embodiment of the invention which differs from the second embodiment shown in Fig. 2 essentially in that the radial bearing 27 extends along the first and second spinning wheels. 16, 17, and over substantially the entire axial length of the drive shaft 4.
    [0017] Of course, the invention is not limited to the embodiments described above by way of non-limiting examples, but on the contrary it encompasses all the corresponding embodiments.
    权利要求:
    Claims (14)
    [0001]
    REVENDICATIONS1. Centrifugal refrigerating compressor (2) comprising: - a hermetic housing (3), - a drive shaft (4) having a first axial end portion (5), a second axial end portion (6) and a portion intermediate member (7) arranged between the first and second axial end portions (5, 6), the drive shaft (4) having a central axial bore (8) extending along at least a portion of the length of the drive shaft (4), - first and second compression stages (9, 11) configured to compress a refrigerant, the first and second compression stages (9, 11) respectively comprising first and second second wheel (16, 17), the first and second wheel (16, 17) being connected to the first axial end portion (5) of the drive shaft (4), - an electric motor (19) configured for rotating the drive shaft (4) about an axis of rotation, the electromotor wherein the rotor (19) comprises a stator (21) and a rotor (22), the rotor being connected to the second axial end portion (6) of the drive shaft (4), - a stationary shaft member (26) attached to the hermetic housing (3) and extending at least partially into the central axial bore (8) of the drive shaft (4), and - a radial bearing arrangement configured to support in rotation driving shaft (4), the radial bearing arrangement being configured to cooperate with an outer surface of the stationary shaft member (26).
    [0002]
    The centrifugal refrigerating compressor (2) according to claim 1, wherein the radial bearing arrangement comprises at least one radial bearing extending along at least a portion of an inner surface of the rotor.
    [0003]
    The centrifugal refrigerating compressor (2) according to claim 1 or 2, wherein the radial bearing arrangement comprises at least one radial bearing extending along at least a portion of at least one of the first and second wheels (16, 17).
    [0004]
    The centrifugal refrigerating compressor (2) according to claim 1, wherein the radial bearing arrangement is arranged between an outer surface of the stationary shaft member (26) and an inner surface of the centrifugal shaft. training (4).
    [0005]
    The centrifugal refrigerating compressor (2) according to any one of claims 1 to 4, wherein the radial bearing arrangement comprises a plurality of radial bearings distributed along the axial length of the stationary shaft member ( 26).
    [0006]
    The centrifugal refrigerating compressor (2) according to any one of claims 1 to 5, further comprising a thrust bearing arrangement configured to limit axial movement of the drive shaft (4) during operation. the thrust bearing arrangement having an abutment bearing element (28) arranged on the outer surface of the intermediate portion (7) of the drive shaft (4). 15
    [0007]
    The centrifugal refrigerating compressor (2) according to claim 6, wherein the thrust bearing arrangement is a fluid thrust bearing arrangement. 20
    [0008]
    Centrifugal refrigerating compressor (2) according to claim 6 or 7, wherein the thrust bearing element (28) extends radially outwards with respect to the intermediate portion (7) of the centrifugal shaft. training (4).
    [0009]
    Centrifugal refrigerating compressor (2) according to one of claims 1 to 8, wherein the central axial bore (8) of the drive shaft (4) extends over the entire length of the shaft. 4, and the rotor (22) has a central axial passage (23) extending over the entire length of the rotor (22), the stationary shaft member (26) extending into the central axial bore (8) and the central axial passage (23) and along them and having a first end portion (26a) and a second end portion (26b) respectively connected to the hermetic housing (3). ).
    [0010]
    The centrifugal refrigerating compressor (2) according to one of claims 1 to 8, wherein the stationary shaft member (26) is cantilevered with respect to the hermetic housing (3). 3037110 15
    [0011]
    The centrifugal refrigerating compressor (2) according to one of claims 1 to 10, wherein the radial bearing arrangement is a radial fluid bearing arrangement, and for example a radial gas bearing arrangement. 5
    [0012]
    12. Centrifugal refrigerating compressor (2) according to one of claims 1 to 11, wherein the first and second wheel (16, 17) are arranged in a back-to-back configuration.
    [0013]
    13. Centrifugal refrigerating compressor (2) according to one of claims 1 to 12, wherein the hermetic housing (3) comprises a low pressure chamber located upstream of the first compression stage (9), and a high pressure chamber located downstream of the second compression stage (11), the electric motor (19) being arranged in the low pressure chamber. 15
    [0014]
    14. Centrifugal refrigerating compressor (2) according to one of claims 1 to 13, further comprising a connecting sleeve (24) configured to connect in rotation the rotor (22) and the second axial end portion (6) of the drive shaft (4).
    类似技术:
    公开号 | 公开日 | 专利标题
    FR3037110B1|2019-11-01|CENTRIFUGAL REFRIGERATING COMPRESSOR
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    FR3055677A1|2018-03-09|MODULAR TURBOCHARGER SHAFT
    FR2888876A1|2007-01-26|Vibration dampening device for aircraft, has dampening ring formed of succession of arcs of circle with different radius and centers in state without constraint so that ring with diameter of groove, at constraint state, has circular shape
    EP2959107A1|2015-12-30|Wheel of a turbine, compressor or pump
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    EP1473462B1|2006-01-25|Cartridge compressor unit
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    FR3102793A1|2021-05-07|Scroll compressor having first and second axial stabilization arrangements
    FR3063778A1|2018-09-14|CENTRIFUGAL TURBOCHARGER
    同族专利:
    公开号 | 公开日
    FR3037110B1|2019-11-01|
    WO2016193002A1|2016-12-08|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US4402618A|1981-02-02|1983-09-06|United Technologies Corporation|High speed rotary machine bearing mount structure|
    DE19646617A1|1996-11-12|1998-05-14|Pierburg Ag|Coolant pump with electrically commutated electric motor e.g. for IC engine|
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    US20140208788A1|2013-01-31|2014-07-31|Danfoss Turbocor Compressors B.V.|Centrifugal compressor with extended operating range|FR3088226A1|2018-11-08|2020-05-15|Danfoss A/S|METHOD FOR MANUFACTURING AN AERODYNAMIC ELEMENT OF A TURBOCHARGER|CA2373905A1|2002-02-28|2003-08-28|Ronald David Conry|Twin centrifugal compressor|FR3063778A1|2017-03-08|2018-09-14|BD Kompressor GmbH|CENTRIFUGAL TURBOCHARGER|
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    FR3085190B1|2018-08-22|2020-12-25|Danfoss As|A TURBOCHARGER HAVING A BEARING SLEEVE PROVIDED WITH A CROSS-SECTION REDUCTION|
    法律状态:
    2016-05-16| PLFP| Fee payment|Year of fee payment: 2 |
    2016-12-09| PLSC| Search report ready|Effective date: 20161209 |
    2017-05-11| PLFP| Fee payment|Year of fee payment: 3 |
    2017-07-21| TP| Transmission of property|Owner name: DANFOSS SILICON POWER GMBH, DE Effective date: 20170621 |
    2018-05-24| PLFP| Fee payment|Year of fee payment: 4 |
    2019-05-24| PLFP| Fee payment|Year of fee payment: 5 |
    2019-12-27| TP| Transmission of property|Owner name: DANFOSS A/S, DK Effective date: 20191119 |
    2020-05-26| PLFP| Fee payment|Year of fee payment: 6 |
    2021-05-27| PLFP| Fee payment|Year of fee payment: 7 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1555134|2015-06-05|
    FR1555134A|FR3037110B1|2015-06-05|2015-06-05|CENTRIFUGAL REFRIGERATING COMPRESSOR|FR1555134A| FR3037110B1|2015-06-05|2015-06-05|CENTRIFUGAL REFRIGERATING COMPRESSOR|
    PCT/EP2016/061189| WO2016193002A1|2015-06-05|2016-05-19|A centrifugal refrigeration compressor|
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