WO2020134517A1 - Compressor - Google Patents
Compressor Download PDFInfo
- Publication number
- WO2020134517A1 WO2020134517A1 PCT/CN2019/113991 CN2019113991W WO2020134517A1 WO 2020134517 A1 WO2020134517 A1 WO 2020134517A1 CN 2019113991 W CN2019113991 W CN 2019113991W WO 2020134517 A1 WO2020134517 A1 WO 2020134517A1
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- WO
- WIPO (PCT)
- Prior art keywords
- gas
- bearing
- housing
- gas bearing
- motor
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
- F04D17/10—Centrifugal pumps for compressing or evacuating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/056—Bearings
- F04D29/057—Bearings hydrostatic; hydrodynamic
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/06—Lubrication
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/582—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps
- F04D29/5846—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps cooling by injection
Definitions
- the present disclosure relates to a compressor.
- centrifugal compressor is a compressor that uses high-speed impeller rotation to generate centrifugal force to compress gas.
- centrifugal compressors mainly use two types of bearings, oil-lubricated bearings and electromagnetic bearings, to support the rotor.
- oil-lubricated bearings need to be equipped with an additional oil supply system, resulting in a complicated structure of the centrifugal compressor. And friction between the oil and the rotor will cause energy loss.
- lubricating oil may leak into the refrigerant, causing refrigerant pollution.
- Electromagnetic bearings have higher control requirements and poor resistance to system impact. In addition, additional power-off protection systems are required.
- Hydrostatic gas bearings are bearings that use gas pressure to support the rotor and are oil-free bearings.
- the structure of this bearing is simple, the friction between the gas and the rotor is small, and no complicated control system is needed.
- the static pressure gas bearing adopts external gas supply, and its gas pressure is easy to adjust, and it can continue to supply gas during the start-stop phase of the compressor, avoiding the contact friction between the rotor and the bearing due to insufficient air supply during the start-stop phase To improve system stability.
- the embodiments of the present disclosure provide a compressor capable of optimizing the internal space of the compressor.
- a compressor including: a housing; a motor stator, provided in the housing; a motor rotor, provided in the housing; a first gas bearing, provided in the housing, And support the rotor of the motor; and a gas supply channel provided in the housing for connecting an external gas source and supplying working gas provided by the external gas source to the first gas bearing; wherein, the The compressor is configured to allow the working gas to flow out from the gap between the first gas bearing and the motor rotor and flow to the first side of the motor stator via the gap between the motor stator and the motor rotor.
- the first side of the motor stator is the side away from the first gas bearing in the axial direction.
- a cooling gas flow path is provided between the housing and the motor stator, and the outlet of the cooling gas flow path is located on the second side of the motor stator to flow from the cooling gas
- the cooling gas flowing out of the outlet of the channel can be mixed with the working gas flowing out from the gap between the first gas bearing and the motor rotor on the second side of the motor stator, and then pass through the motor stator and the rotor of the motor.
- the gap flows to the first side of the motor stator;
- the second side of the motor stator is the side of the motor stator which is close to the first gas bearing in the axial direction.
- the first gas bearing includes: a first thrust gas bearing supporting the motor rotor in the axial direction and a first radial gas bearing supporting the motor rotor in the radial direction;
- the air supply channel includes:
- a first air supply channel is provided in the housing for connecting an external air source, and supplies working gas provided by the external air source to the first radial gas bearing;
- a second air supply channel is provided in the housing for connecting an external air source, and supplies working gas provided by the external air source to the first thrust gas bearing.
- the first air supply channel and the second air supply channel are spaced apart from each other in the housing.
- the air inlet of the first air supply channel on the housing and the air inlet of the second air supply channel on the housing are located in opposite directions of the housing.
- the compressor further includes: a second gas bearing disposed in the housing and supporting the motor rotor;
- the air supply channel further includes:
- a third air supply channel is provided in the housing for connecting an external air source, and supplies working gas provided by the external air source to the second gas bearing.
- the third air supply channel and the first air supply channel communicate with each other and share the same air inlet on the housing.
- the compressor further includes:
- the first-level impeller and the second-level impeller are fixedly connected to both ends of the motor rotor, respectively;
- a second gas bearing which is disposed adjacent to the secondary impeller and supports the motor rotor in the radial direction;
- a bearing seat is provided in the housing and supports the second gas bearing
- the gas supply channel is also in communication with the second gas bearing for supplying the working gas provided by the external gas source to the second gas bearing
- the bearing seat is provided with a support for supporting the first
- a bearing mounting hole of a two-gas bearing, a vent hole group is provided between the bearing mounting hole and a surface of the bearing seat close to the stator side of the motor, for guiding from the second gas bearing and the motor The working gas flowing out of the gap of the rotor flows toward the bearing seat close to the stator of the motor.
- the compressor further includes: an axial sealing mechanism, disposed between the motor rotor and the bearing housing, for forming a seal on one side of the second gas bearing in the axial direction effect.
- the axial sealing mechanism includes: a comb-tooth seal, the comb-tooth seal is sleeved on the rotor of the motor, and is fixedly connected to the bearing seat, and the comb-tooth seal A flange near one side of the second gas bearing is provided with a group of ventilation slots, and the group of ventilation slots is at least partially in communication with the group of ventilation holes.
- the vent hole group includes at least one vent hole distributed along the circumferential direction of the bearing housing, and the vent slot group includes at least one vent hole distributed along the circumferential direction of the comb-tooth seal,
- the number of the vent holes is the same as the number of the vent grooves, and each vent groove is aligned with each vent hole.
- the compressor is a centrifugal compressor.
- the first gas bearing is a static pressure gas bearing.
- the second gas bearing is a static pressure gas bearing.
- the compressor further includes: an exhaust device, an intake port of which is located in the housing, for flowing out from the gap between the first gas bearing and the motor rotor, and passing the The working gas flowing from the gap between the motor stator and the motor rotor to the first side of the motor stator is discharged out of the housing.
- a gas supply channel that supplies the working gas outside the casing to the first gas bearing inside the casing, and will flow out from the gap between the first gas bearing and the motor rotor, and pass through the motor stator and the motor rotor.
- the working gas flowing to the other side of the stator of the motor is discharged to the outside of the housing, so that the external working gas can be accurately supplied to the first gas bearing and is absorbed by the exhaust device after the rotor gap of the motor is fixed, so that no additional Gas collection device, thereby optimizing the internal space of the compressor.
- FIG. 1 is a schematic cross-sectional view of some embodiments of a compressor according to the present disclosure
- FIG. 2 is a schematic structural view of a bearing housing in some embodiments of a compressor according to the present disclosure
- FIG. 3 is a schematic diagram of the A-A section in FIG. 2;
- FIG. 4 is a schematic structural view of a comb-tooth seal in some embodiments of a compressor according to the present disclosure
- FIG. 5 is a schematic diagram of the B-B cross section in FIG. 4.
- first”, “second” and similar words used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different parts. Similar words such as “include” or “include” mean that the elements before the word cover the elements listed after the word, and do not exclude the possibility of covering other elements. “Up”, “down”, “left”, “right”, etc. are only used to indicate the relative positional relationship. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.
- a specific device when it is described that a specific device is located between the first device and the second device, there may or may not be an intervening device between the specific device and the first device or the second device.
- the specific device When it is described that a specific device is connected to another device, the specific device may be directly connected to the other device without an intervening device, or may be directly connected to the other device without an intervening device.
- the compressor includes: a housing 2, a motor stator 3, a motor rotor 8 and a first gas bearing.
- the compressor is a centrifugal compressor.
- the compressor is another type of compressor, such as a screw compressor or a vane compressor.
- the motor stator 3 and the motor rotor 8 are both arranged in the housing 2.
- a gap is formed between the motor stator 3 and the motor rotor 8.
- at least one stage of impeller is included within the housing 2.
- the at least one-stage impeller is fixedly connected to the motor rotor 8 and can rotate with the rotation of the motor rotor 8.
- the first gas bearing is provided in the housing 2 and supports the motor rotor 8.
- the first gas bearing is a static pressure gas bearing.
- the compressor further includes a gas supply channel.
- the air supply channel is provided in the housing 2 for connecting an external air source, and supplies working gas provided by the external air source to the first gas bearing.
- the external air source can enter the first gas bearing accurately and with less loss through the air supply channel.
- the first gas bearing includes: first thrust gas bearings 12, 14 and first radial gas bearing 11.
- the first thrust gas bearings 12 and 14 are respectively located on the right side and the left side of the thrust disk 18 fixedly connected to the motor rotor, which can achieve the support effect of the motor rotor 8 in the axial direction.
- the first radial gas bearing 11 is sleeved on the motor rotor 8 and supports the motor rotor 8 in the radial direction.
- the air supply channel includes: a first air supply channel 10 and a second air supply channel 16.
- the first air supply channel 10 is provided in the housing 2 for connecting an external air source, and supplies working gas provided by the external air source to the first radial gas bearing 11.
- the first air supply channel 10 is opened inside the shell wall of the housing 2 and includes a plurality of sub-channels along the horizontal and vertical directions. These linear sub-channels can further reduce the pressure loss of the gas along the way.
- the end of the first air supply channel 10 is directly aligned with the outer ring of the first radial gas bearing 11, so that the working gas of the external gas source can be passed into the first radial gas bearing 11 accurately and with less loss.
- the working gas passed into the first radial gas bearing 11 can penetrate into the gap between the first radial gas bearing 11 and the motor rotor 8 through the porous material of the bearing to form a static pressure gas supporting effect.
- the second air supply channel 16 is provided in the housing 2 for connecting an external air source, and supplies working gas provided by the external air source to the first thrust gas bearings 12 and 14.
- a part of the second air supply channel 16 is opened inside the wall of the housing 2 and its end is aligned with the right end surface of the first thrust gas bearing 12, while the other part is opened between the first thrust
- the gas bearing 14 is closely attached to the inside of the diffuser 13, and its end is aligned with the left end surface of the first thrust gas bearing 14, so that the working gas of the external air source can be accurately and less lost into the first thrust gas Bearings 12, 14.
- the second gas supply channel 16 includes a plurality of sub-channels in the horizontal and vertical directions. These linear sub-channels can further reduce the pressure loss of the gas along the way.
- the working gas passed into the first thrust gas bearings 12 and 14 can penetrate into the gap between the first thrust gas bearings 12 and 14 and the thrust disc 18 through the porous material of the bearing, respectively, to form a static pressure gas support effect.
- the gas pressure required for the thrust gas bearing and the radial gas bearing is different, so in some embodiments, the first gas supply channel 10 and the second gas supply channel 16 are located in the The housing 2 is spaced apart from each other.
- the first air supply channel 10 and the second air supply channel 16 are independent of each other, and do not directly communicate in the internal channel of the housing.
- the air inlet 9 of the first air supply channel 10 on the outside of the casing and the air inlet 1 of the second air supply channel 16 on the outside of the housing are respectively provided in different parts of the housing 2, and the first air supply channel 10 does not directly communicate with the second air supply channel 16.
- the air inlet 9 and the air inlet 1 are connected to external air sources of different pressures, so as to meet the working gas supply of the gas bearing that is more in line with the working conditions, and make the structure of the air supply channel simpler.
- the first air supply channel 10 on the housing 2 is connected to the air inlet 9
- the air inlet 1 of the second air supply channel 16 on the housing 2 is disposed in the opposite direction of the housing 2, for example, below and above the housing 2.
- the compressor is configured to allow outflow from the gap between the first gas bearing and the motor rotor 8 and flow to the via the gap between the motor stator 3 and the motor rotor 8
- the working gas on the first side of the motor stator 3 is discharged to the outside of the housing 2.
- the first side of the motor stator 3 is the side of the motor stator 3 that is away from the first gas bearing in the axial direction.
- the working gas input from the outside of the compressor can be more easily discharged from the inside of the compressor to ensure the stability of the gas supply, without the need to provide a special device for collecting working gas, thereby optimizing the internal space of the compressor.
- the cooling effect of the motor stator and the motor rotor can also be achieved by the flow of working gas in the fixed rotor gap.
- the compressor further includes an exhaust device 21 (indicated by arrows).
- the suction port of the exhaust device 21 is located in the housing 2, which can flow out from the gap between the first gas bearing and the motor rotor 8 and pass through The gap between the motor stator 3 and the motor rotor 8 flows to the first side of the motor stator 3 (that is, the side of the motor stator 3 that is away from the first gas bearing in the axial direction, corresponding to FIG. 1
- the working gas in the area B) is discharged outside the housing 2.
- a cooling gas flow channel 15 is provided between the housing 2 and the motor stator 3.
- the outlet of the cooling gas flow channel 15 is located on the second side of the motor stator 3 (i.e., the side of the motor stator 3 near the first gas bearing in the axial direction).
- the cooling gas that enters the cooling gas flow channel 15 can flow out from the outlet of the cooling gas flow channel 15, and the working gas that flows out from the gap between the first gas bearing and the motor rotor 8 can
- the two sides (corresponding to area A in FIG. 1) are mixed, and the mixed gas medium flows to the first side of the motor stator 3 through the gap between the motor stator 3 and the motor rotor 8 (corresponding to FIG. 1) Area B).
- the cooling effect of the motor stator 3 and the motor rotor 8 can be achieved when passing between the motor stator 3 and the motor rotor 8, and can also be absorbed by the exhaust device 21 and discharged to the outside of the housing, so that The gas circulation inside and outside the compressor is smoother, ensuring the stability of the internal working of the compressor.
- the cooling gas and the working gas are the same medium, and in other embodiments, the cooling gas and the working gas are different media.
- both the cooling gas and the working gas are refrigerant compressed by the compressor.
- the compressor includes a two-stage impeller.
- the two-stage impeller is fixedly connected to both ends of the rotor 8 of the motor.
- the gas bearings 11 are arranged on the side of the motor rotor 8 close to the second-stage impeller 20 relative to the first-stage impeller 19.
- the compressor further includes a second gas bearing 6, which supports the motor rotor 8 at a position of the two-stage impeller 20 close to the first impeller 19 side.
- the second gas bearing is a static pressure gas bearing.
- the second gas bearing 6 is supported by the bearing seat 5 provided in the housing 2.
- the air supply channel further includes: a third air supply channel 17 disposed in the housing 2.
- the third air supply channel 17 is used to connect an external air source and supply working gas provided by the external air source to the second gas bearing 6.
- the third gas supply channel 17 and the second gas supply channel 16 are mutually connected They are connected and share the same air inlet on the housing 2 to simplify the air supply channel.
- the gas supply passage 10 communicates with the second gas bearing 6 (directly communicated, or communicated via a flow passage 53 opened on the bearing seat 5), which is used to connect the external
- the working gas provided by the gas source is supplied to the second gas bearing 6.
- the bearing housing 5 has a bearing mounting hole 52 provided for supporting the second gas bearing 6, and a vent hole is provided between the bearing mounting hole 52 and a surface of the bearing housing 5 close to the motor stator 3 side group.
- the vent hole group includes at least one vent hole 51 distributed along the circumferential direction of the bearing seat 5.
- the vent hole group can guide the working gas flowing out from the gap between the second gas bearing 6 and the motor rotor 8 to flow to the area B of the bearing housing 5 close to the motor stator 3 side.
- the working gas entering the area B can be absorbed by the exhaust device 21 and discharged out of the casing.
- the compressor further includes: an axial sealing mechanism, which is disposed between the motor rotor 8 and the bearing seat 5, and is used for the second gas bearing 6 in the axial direction
- the side of the seal is formed.
- the axial sealing mechanism includes: a comb-tooth seal 7.
- the comb-tooth seal 7 is sleeved on the motor rotor 8 and fixedly connected to the bearing housing 5.
- a flange 74 on the side of the comb-tooth seal 7 near the second gas bearing 6 is provided
- a vent slot group, the vent slot group is at least partially in communication with the vent hole group.
- the comb seal 7 is also provided with comb teeth 71 arranged in the axial direction and an assembly hole 72 for assembling with the bearing housing 5.
- the vent groove group includes at least one vent groove group distributed along the circumferential direction of the comb-tooth seal 7, in order to smoothly discharge the working gas flowing out from the gap between the second gas bearing 6 and the motor rotor 8,
- the number of vent holes 51 is the same as the number of vent grooves 71, for example, 5 (or 3 or 7 all), and each vent groove 71 is aligned with each vent hole 51, respectively.
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Abstract
A compressor, comprising: a housing (2); a motor stator (3) provided in the housing (2); a motor rotor (8) provided in the housing (2); a first gas bearing provided in the housing (2) and supporting the motor rotor (8); and an air supply flow channel provided in the housing (2), and used for being connected to an external air source and supplying working air provided by the external air source to the first air bearing; wherein the compressor is configured to allow the working gas that flows out of a gap between the first gas bearing and the motor rotor (8), and flows to a first side of the motor stator (3) by means of a gap between the motor stator (3) and the motor rotor (8) to be discharged from the housing (2); and the first side of the motor stator (3) is a side, away from the first gas bearing, of the motor stator (3) in an axial direction. The compressor can optimize an internal space of the compressor.
Description
相关申请的交叉引用Cross-reference of related applications
本公开是以CN申请号为201811593234.6,申请日为2018年12月25日的申请为基础,并主张其优先权,该CN申请的公开内容在此作为整体引入本公开中。This disclosure is based on the application with the CN application number 201811593234.6 and the application date is December 25, 2018, and claims its priority. The disclosure content of this CN application is hereby incorporated into this disclosure as a whole.
本公开涉及一种压缩机。The present disclosure relates to a compressor.
离心式压缩机是一种利用高速叶轮旋转产生离心力来进行气体压缩的压缩机。目前,离心式压缩机主要采用油润滑轴承与电磁轴承两种轴承对转子进行支撑。其中,油润滑轴承需要配套额外的供油系统,导致离心式压缩机结构复杂。而且油与转子之间发生摩擦,会导致能量损失。此外,润滑油还有可能泄漏到冷媒中,造成冷媒的污染。电磁轴承对控制的要求较高,抗系统冲击能力较差,此外还需要额外的断电保护系统。A centrifugal compressor is a compressor that uses high-speed impeller rotation to generate centrifugal force to compress gas. At present, centrifugal compressors mainly use two types of bearings, oil-lubricated bearings and electromagnetic bearings, to support the rotor. Among them, oil-lubricated bearings need to be equipped with an additional oil supply system, resulting in a complicated structure of the centrifugal compressor. And friction between the oil and the rotor will cause energy loss. In addition, lubricating oil may leak into the refrigerant, causing refrigerant pollution. Electromagnetic bearings have higher control requirements and poor resistance to system impact. In addition, additional power-off protection systems are required.
静压气体轴承是一种利用气体压力来进行转子支撑的轴承,属于无油轴承。这种轴承的结构简单,气体与转子之间的摩擦较小,也不需要复杂的控制系统。静压气体轴承采用外部供气,其气体压力易于调节,且能够在压缩机启停阶段持续供气,避免了转子与轴承之间由于启停阶段供气不足所造成的转子与轴承的接触摩擦,提高了系统稳定性。Hydrostatic gas bearings are bearings that use gas pressure to support the rotor and are oil-free bearings. The structure of this bearing is simple, the friction between the gas and the rotor is small, and no complicated control system is needed. The static pressure gas bearing adopts external gas supply, and its gas pressure is easy to adjust, and it can continue to supply gas during the start-stop phase of the compressor, avoiding the contact friction between the rotor and the bearing due to insufficient air supply during the start-stop phase To improve system stability.
发明内容Summary of the invention
经发明人研究发现,相关技术的压缩机难以将外部气体准确地且以较小损失的情况下通入气体轴承,并且往往需要设置额外的气体收集装置,占用压缩机的内部空间。It has been discovered by the inventors that the compressor of the related art has difficulty in passing external gas into the gas bearing accurately and with a small loss, and often requires an additional gas collection device to occupy the internal space of the compressor.
有鉴于此,本公开实施例提供一种压缩机,能够优化压缩机内部空间。In view of this, the embodiments of the present disclosure provide a compressor capable of optimizing the internal space of the compressor.
在本公开的一个方面,提供一种压缩机,包括:壳体;电机定子,设置在所述壳体内;电机转子,设置在所述壳体内;第一气体轴承,设置在所述壳体内,并支撑所述电机转子;和供气流道,设置在所述壳体内,用于连接外部气源,并将所述外部气源提供的工作气体供应给所述第一气体轴承;其中,所述压缩机被配置为允许从所述 第一气体轴承和所述电机转子的间隙流出,并经由所述电机定子和所述电机转子的间隙流动到所述电机定子的第一侧的工作气体向所述壳体外排出,所述电机定子的第一侧为所述电机定子在轴向上远离所述第一气体轴承的一侧。In one aspect of the present disclosure, a compressor is provided, including: a housing; a motor stator, provided in the housing; a motor rotor, provided in the housing; a first gas bearing, provided in the housing, And support the rotor of the motor; and a gas supply channel provided in the housing for connecting an external gas source and supplying working gas provided by the external gas source to the first gas bearing; wherein, the The compressor is configured to allow the working gas to flow out from the gap between the first gas bearing and the motor rotor and flow to the first side of the motor stator via the gap between the motor stator and the motor rotor. The first side of the motor stator is the side away from the first gas bearing in the axial direction.
在一些实施例中,在所述壳体与所述电机定子之间设有冷却气体流道,所述冷却气体流道的出口位于所述电机定子的第二侧,以便从所述冷却气体流道的出口流出的冷却气体能够与从所述第一气体轴承和所述电机转子的间隙流出的工作气体在所述电机定子的第二侧混合,再经由所述电机定子和所述电机转子的间隙流动到所述电机定子的第一侧;In some embodiments, a cooling gas flow path is provided between the housing and the motor stator, and the outlet of the cooling gas flow path is located on the second side of the motor stator to flow from the cooling gas The cooling gas flowing out of the outlet of the channel can be mixed with the working gas flowing out from the gap between the first gas bearing and the motor rotor on the second side of the motor stator, and then pass through the motor stator and the rotor of the motor. The gap flows to the first side of the motor stator;
其中,所述电机定子的第二侧为所述电机定子在轴向上靠近所述第一气体轴承的一侧。Wherein, the second side of the motor stator is the side of the motor stator which is close to the first gas bearing in the axial direction.
在一些实施例中,所述第一气体轴承包括:在轴向上支撑所述电机转子的第一推力气体轴承和在径向上支撑所述电机转子的第一径向气体轴承;In some embodiments, the first gas bearing includes: a first thrust gas bearing supporting the motor rotor in the axial direction and a first radial gas bearing supporting the motor rotor in the radial direction;
所述供气流道包括:The air supply channel includes:
第一供气流道,设置在所述壳体内,用于连接外部气源,并将所述外部气源提供的工作气体供应给所述第一径向气体轴承;A first air supply channel is provided in the housing for connecting an external air source, and supplies working gas provided by the external air source to the first radial gas bearing;
第二供气流道,设置在所述壳体内,用于连接外部气源,并将所述外部气源提供的工作气体供应给所述第一推力气体轴承。A second air supply channel is provided in the housing for connecting an external air source, and supplies working gas provided by the external air source to the first thrust gas bearing.
在一些实施例中,所述第一供气流道与所述第二供气流道在所述壳体内相互分隔设置。In some embodiments, the first air supply channel and the second air supply channel are spaced apart from each other in the housing.
在一些实施例中,所述第一供气流道在所述壳体上的进气口与所述第二供气流道在所述壳体上的进气口位于所述壳体的相反方向。In some embodiments, the air inlet of the first air supply channel on the housing and the air inlet of the second air supply channel on the housing are located in opposite directions of the housing.
在一些实施例中,所述压缩机还包括:第二气体轴承,设置在所述壳体内,并支撑所述电机转子;In some embodiments, the compressor further includes: a second gas bearing disposed in the housing and supporting the motor rotor;
所述供气流道还包括:The air supply channel further includes:
第三供气流道,设置在所述壳体内,用于连接外部气源,并将所述外部气源提供的工作气体供应给所述第二气体轴承。A third air supply channel is provided in the housing for connecting an external air source, and supplies working gas provided by the external air source to the second gas bearing.
在一些实施例中,所述第三供气流道与所述第一供气流道相互连通,且共用壳体上的同一进气口。In some embodiments, the third air supply channel and the first air supply channel communicate with each other and share the same air inlet on the housing.
在一些实施例中,所述压缩机还包括:In some embodiments, the compressor further includes:
一级叶轮和二级叶轮,分别与所述电机转子的两端固定连接;The first-level impeller and the second-level impeller are fixedly connected to both ends of the motor rotor, respectively;
第二气体轴承,设置在临近所述二级叶轮的位置,并在径向上支撑所述电机转子;和A second gas bearing, which is disposed adjacent to the secondary impeller and supports the motor rotor in the radial direction; and
轴承座,设置在所述壳体内,且对所述第二气体轴承进行支撑;A bearing seat is provided in the housing and supports the second gas bearing;
其中,所述供气流道还与所述第二气体轴承连通,用于将所述外部气源提供的工作气体供应给所述第二气体轴承,所述轴承座具有设有用于支撑所述第二气体轴承的轴承安装孔,在所述轴承安装孔与所述轴承座靠近所述电机定子一侧的表面之间设有通气孔组,用于引导从所述第二气体轴承和所述电机转子的间隙流出的工作气体流向所述轴承座靠近所述电机定子一侧。Wherein, the gas supply channel is also in communication with the second gas bearing for supplying the working gas provided by the external gas source to the second gas bearing, and the bearing seat is provided with a support for supporting the first A bearing mounting hole of a two-gas bearing, a vent hole group is provided between the bearing mounting hole and a surface of the bearing seat close to the stator side of the motor, for guiding from the second gas bearing and the motor The working gas flowing out of the gap of the rotor flows toward the bearing seat close to the stator of the motor.
在一些实施例中,所述压缩机还包括:轴向密封机构,设置在所述电机转子与所述轴承座之间,用于在所述第二气体轴承的轴向上的一侧形成密封作用。In some embodiments, the compressor further includes: an axial sealing mechanism, disposed between the motor rotor and the bearing housing, for forming a seal on one side of the second gas bearing in the axial direction effect.
在一些实施例中,所述轴向密封机构包括:梳齿密封件,所述梳齿密封件套设在所述电机转子上,并与所述轴承座固定连接,在所述梳齿密封件靠近所述第二气体轴承一侧的凸缘上设有通气槽组,所述通气槽组与所述通气孔组至少部分地连通。In some embodiments, the axial sealing mechanism includes: a comb-tooth seal, the comb-tooth seal is sleeved on the rotor of the motor, and is fixedly connected to the bearing seat, and the comb-tooth seal A flange near one side of the second gas bearing is provided with a group of ventilation slots, and the group of ventilation slots is at least partially in communication with the group of ventilation holes.
在一些实施例中,所述通气孔组包括沿所述轴承座的周向上分布的至少一个通气孔,所述通气槽组包括沿所述梳齿密封件的周向上分布的至少一个通气槽,所述通气孔的数量与所述通气槽的数量相同,且各个通气槽分别与各个通气孔对齐。In some embodiments, the vent hole group includes at least one vent hole distributed along the circumferential direction of the bearing housing, and the vent slot group includes at least one vent hole distributed along the circumferential direction of the comb-tooth seal, The number of the vent holes is the same as the number of the vent grooves, and each vent groove is aligned with each vent hole.
在一些实施例中,所述压缩机为离心式压缩机。In some embodiments, the compressor is a centrifugal compressor.
在一些实施例中,所述第一气体轴承为静压气体轴承。In some embodiments, the first gas bearing is a static pressure gas bearing.
在一些实施例中,所述第二气体轴承为静压气体轴承。In some embodiments, the second gas bearing is a static pressure gas bearing.
在一些实施例中,所述压缩机还包括:排气装置,其吸气口位于所述壳体内,用于将从所述第一气体轴承和所述电机转子的间隙流出,并经由所述电机定子和所述电机转子的间隙流动到所述电机定子的第一侧的工作气体向所述壳体外排出。In some embodiments, the compressor further includes: an exhaust device, an intake port of which is located in the housing, for flowing out from the gap between the first gas bearing and the motor rotor, and passing the The working gas flowing from the gap between the motor stator and the motor rotor to the first side of the motor stator is discharged out of the housing.
因此,根据本公开实施例,通过在壳体内设置供应壳体外的工作气体给第一气体轴承的供气流道,并将从第一气体轴承和电机转子的间隙流出,并经由电机定子和电机转子的间隙流动到电机定子另一侧的工作气体排出到壳体外,使得外部工作气体能够在准确地供应给第一气体轴承,并经过电机定转子间隙后被排气装置吸收,从而无需设置额外的气体收集装置,进而优化压缩机内部空间。Therefore, according to an embodiment of the present disclosure, by providing a gas supply channel that supplies the working gas outside the casing to the first gas bearing inside the casing, and will flow out from the gap between the first gas bearing and the motor rotor, and pass through the motor stator and the motor rotor The working gas flowing to the other side of the stator of the motor is discharged to the outside of the housing, so that the external working gas can be accurately supplied to the first gas bearing and is absorbed by the exhaust device after the rotor gap of the motor is fixed, so that no additional Gas collection device, thereby optimizing the internal space of the compressor.
构成说明书的一部分的附图描述了本公开的实施例,并且连同说明书一起用于解 释本公开的原理。The drawings that constitute a part of the description describe embodiments of the present disclosure, and together with the description are used to explain the principles of the present disclosure.
参照附图,根据下面的详细描述,可以更加清楚地理解本公开,其中:With reference to the drawings, the present disclosure can be more clearly understood from the following detailed description, in which:
图1是根据本公开压缩机的一些实施例的截面示意图;1 is a schematic cross-sectional view of some embodiments of a compressor according to the present disclosure;
图2是根据本公开压缩机的一些实施例中轴承座的结构示意图;2 is a schematic structural view of a bearing housing in some embodiments of a compressor according to the present disclosure;
图3是图2中A-A截面的示意图;FIG. 3 is a schematic diagram of the A-A section in FIG. 2;
图4是根据本公开压缩机的一些实施例中梳齿密封件的结构示意图;4 is a schematic structural view of a comb-tooth seal in some embodiments of a compressor according to the present disclosure;
图5是图4中B-B截面的示意图。FIG. 5 is a schematic diagram of the B-B cross section in FIG. 4.
应当明白,附图中所示出的各个部分的尺寸并不是按照实际的比例关系绘制的。此外,相同或类似的参考标号表示相同或类似的构件。It should be understood that the dimensions of the various parts shown in the drawings are not drawn according to the actual proportional relationship. In addition, the same or similar reference numerals indicate the same or similar components.
现在将参照附图来详细描述本公开的各种示例性实施例。对示例性实施例的描述仅仅是说明性的,决不作为对本公开及其应用或使用的任何限制。本公开可以以许多不同的形式实现,不限于这里所述的实施例。提供这些实施例是为了使本公开透彻且完整,并且向本领域技术人员充分表达本公开的范围。应注意到:除非另外具体说明,否则在这些实施例中阐述的部件和步骤的相对布置应被解释为仅仅是示例性的,而不是作为限制。Various exemplary embodiments of the present disclosure will now be described in detail with reference to the drawings. The description of the exemplary embodiments is merely illustrative, and in no way serves as any limitation to the present disclosure and its application or use. The present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. These examples are provided to make the present disclosure thorough and complete, and to fully express the scope of the present disclosure to those skilled in the art. It should be noted that the relative arrangement of components and steps set forth in these embodiments should be interpreted as exemplary only, and not as limitations, unless specifically stated otherwise.
本公开中使用的“第一”、“第二”以及类似的词语并不表示任何顺序、数量或者重要性,而只是用来区分不同的部分。“包括”或者“包含”等类似的词语意指在该词前的要素涵盖在该词后列举的要素,并不排除也涵盖其他要素的可能。“上”、“下”、“左”、“右”等仅用于表示相对位置关系,当被描述对象的绝对位置改变后,则该相对位置关系也可能相应地改变。The terms “first”, “second” and similar words used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different parts. Similar words such as "include" or "include" mean that the elements before the word cover the elements listed after the word, and do not exclude the possibility of covering other elements. "Up", "down", "left", "right", etc. are only used to indicate the relative positional relationship. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.
在本公开中,当描述到特定器件位于第一器件和第二器件之间时,在该特定器件与第一器件或第二器件之间可以存在居间器件,也可以不存在居间器件。当描述到特定器件连接其它器件时,该特定器件可以与所述其它器件直接连接而不具有居间器件,也可以不与所述其它器件直接连接而具有居间器件。In the present disclosure, when it is described that a specific device is located between the first device and the second device, there may or may not be an intervening device between the specific device and the first device or the second device. When it is described that a specific device is connected to another device, the specific device may be directly connected to the other device without an intervening device, or may be directly connected to the other device without an intervening device.
本公开使用的所有术语(包括技术术语或者科学术语)与本公开所属领域的普通技术人员理解的含义相同,除非另外特别定义。还应当理解,在诸如通用字典中定义的术语应当被解释为具有与它们在相关技术的上下文中的含义相一致的含义,而不应用理想化或极度形式化的意义来解释,除非这里明确地这样定义。All terms (including technical or scientific terms) used in the present disclosure have the same meaning as understood by those of ordinary skill in the art to which the present disclosure belongs, unless specifically defined otherwise. It should also be understood that terms defined in, for example, general dictionaries should be interpreted as having meanings consistent with their meanings in the context of related technologies, and should not be interpreted using idealized or extremely formal meanings unless explicitly stated here Define it this way.
对于相关领域普通技术人员已知的技术、方法和设备可能不作详细讨论,但在适当情况下,所述技术、方法和设备应当被视为说明书的一部分。Techniques, methods and equipment known to those of ordinary skill in the related art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the specification.
如图1所示,是根据本公开压缩机的一些实施例的截面示意图。参考图1,在一些实施例中,压缩机包括:壳体2、电机定子3、电机转子8和第一气体轴承。在一些实施例中,压缩机为离心式压缩机。在另一些实施例中,压缩机为其他类型的压缩机,例如螺杆压缩机或滑片式压缩机。电机定子3和电机转子8均设置在所述壳体2内。在电机定子3和电机转子8之间形成有间隙。在一些实施例中,在壳体2内包括至少一级叶轮。至少一级叶轮与电机转子8固定连接,并能够随着电机转子8的转动而转动。第一气体轴承设置在所述壳体2内,并支撑所述电机转子8。在一些实施例中,第一气体轴承为静压气体轴承。As shown in FIG. 1, it is a schematic cross-sectional view of some embodiments of a compressor according to the present disclosure. Referring to FIG. 1, in some embodiments, the compressor includes: a housing 2, a motor stator 3, a motor rotor 8 and a first gas bearing. In some embodiments, the compressor is a centrifugal compressor. In other embodiments, the compressor is another type of compressor, such as a screw compressor or a vane compressor. The motor stator 3 and the motor rotor 8 are both arranged in the housing 2. A gap is formed between the motor stator 3 and the motor rotor 8. In some embodiments, at least one stage of impeller is included within the housing 2. The at least one-stage impeller is fixedly connected to the motor rotor 8 and can rotate with the rotation of the motor rotor 8. The first gas bearing is provided in the housing 2 and supports the motor rotor 8. In some embodiments, the first gas bearing is a static pressure gas bearing.
在一些实施例中,压缩机还包括供气流道。该供气流道设置在所述壳体2内,用于连接外部气源,并将所述外部气源提供的工作气体供应给所述第一气体轴承。外部气源能够经过供气流道准确且以较少的损失进入到第一气体轴承。In some embodiments, the compressor further includes a gas supply channel. The air supply channel is provided in the housing 2 for connecting an external air source, and supplies working gas provided by the external air source to the first gas bearing. The external air source can enter the first gas bearing accurately and with less loss through the air supply channel.
参考图1,在一些实施例中,第一气体轴承包括:第一推力气体轴承12、14和第一径向气体轴承11。第一推力气体轴承12和14分别位于与所述电机转子固定连接的推力盘18的右侧和左侧,能够实现电机转子8在轴向上的支撑作用。第一径向气体轴承11套设在电机转子8上,并在径向上支撑所述电机转子8。Referring to FIG. 1, in some embodiments, the first gas bearing includes: first thrust gas bearings 12, 14 and first radial gas bearing 11. The first thrust gas bearings 12 and 14 are respectively located on the right side and the left side of the thrust disk 18 fixedly connected to the motor rotor, which can achieve the support effect of the motor rotor 8 in the axial direction. The first radial gas bearing 11 is sleeved on the motor rotor 8 and supports the motor rotor 8 in the radial direction.
对于上述第一气体轴承,在一些实施例中,供气流道包括:第一供气流道10和第二供气流道16。第一供气流道10设置在所述壳体2内,用于连接外部气源,并将所述外部气源提供的工作气体供应给所述第一径向气体轴承11。在图1中,第一供气流道10开设在壳体2的壳壁内部,并包括多个沿水平和竖直方向的子流道。这些呈直线型的子流道能够进一步减少气体的沿程压力损失。第一供气流道10的末端直接对准第一径向气体轴承11的外圈,从而使外部气源的工作气体能够准确而较少损失的通入第一径向气体轴承11。通入第一径向气体轴承11的工作气体能够通过轴承的多孔材质渗入到第一径向气体轴承11与电机转子8之间的间隙内,形成静压气体支撑作用。For the first gas bearing described above, in some embodiments, the air supply channel includes: a first air supply channel 10 and a second air supply channel 16. The first air supply channel 10 is provided in the housing 2 for connecting an external air source, and supplies working gas provided by the external air source to the first radial gas bearing 11. In FIG. 1, the first air supply channel 10 is opened inside the shell wall of the housing 2 and includes a plurality of sub-channels along the horizontal and vertical directions. These linear sub-channels can further reduce the pressure loss of the gas along the way. The end of the first air supply channel 10 is directly aligned with the outer ring of the first radial gas bearing 11, so that the working gas of the external gas source can be passed into the first radial gas bearing 11 accurately and with less loss. The working gas passed into the first radial gas bearing 11 can penetrate into the gap between the first radial gas bearing 11 and the motor rotor 8 through the porous material of the bearing to form a static pressure gas supporting effect.
第二供气流道16设置在所述壳体2内,用于连接外部气源,并将所述外部气源提供的工作气体供应给所述第一推力气体轴承12、14。在一些实施例中,第二供气流道16的一部分开设在壳体2的壳壁内部,且其末端对准第一推力气体轴承12的右侧端面,而另一部分则开设在与第一推力气体轴承14紧贴设置的扩压器13内部,其末 端对准第一推力气体轴承14的左侧端面,这样能够使外部气源的工作气体能够准确而较少损失的通入第一推力气体轴承12、14。The second air supply channel 16 is provided in the housing 2 for connecting an external air source, and supplies working gas provided by the external air source to the first thrust gas bearings 12 and 14. In some embodiments, a part of the second air supply channel 16 is opened inside the wall of the housing 2 and its end is aligned with the right end surface of the first thrust gas bearing 12, while the other part is opened between the first thrust The gas bearing 14 is closely attached to the inside of the diffuser 13, and its end is aligned with the left end surface of the first thrust gas bearing 14, so that the working gas of the external air source can be accurately and less lost into the first thrust gas Bearings 12, 14.
在一些实施例中,第二供气流道16包括多个沿水平和竖直方向的子流道,这些呈直线型的子流道能够进一步减少气体的沿程压力损失。通入第一推力气体轴承12和14的工作气体能够通过轴承的多孔材质渗入到第一推力气体轴承12和14分别与推力盘18之间的间隙内,形成静压气体支撑作用。In some embodiments, the second gas supply channel 16 includes a plurality of sub-channels in the horizontal and vertical directions. These linear sub-channels can further reduce the pressure loss of the gas along the way. The working gas passed into the first thrust gas bearings 12 and 14 can penetrate into the gap between the first thrust gas bearings 12 and 14 and the thrust disc 18 through the porous material of the bearing, respectively, to form a static pressure gas support effect.
考虑到在一些实施例中,推力气体轴承和径向气体轴承所需要的气体压力有所不同,因此在一些实施例中,第一供气流道10与所述第二供气流道16在所述壳体2内相互分隔设置。换句话说,第一供气流道10与第二供气流道16相互独立,并在壳体的内部流道中不直接连通。例如将第一供气流道10在壳体外侧的进气口9与第二供气流道16在壳体外侧的进气口1分别设置在壳体2的不同部位,并使第一供气流道10不与第二供气流道16直接连通。这样进气口9与进气口1连接不同压力的外部气源,从而满足更符合工况的气体轴承的工作气体供应,并且使供气流道结构更加简单。Considering that in some embodiments, the gas pressure required for the thrust gas bearing and the radial gas bearing is different, so in some embodiments, the first gas supply channel 10 and the second gas supply channel 16 are located in the The housing 2 is spaced apart from each other. In other words, the first air supply channel 10 and the second air supply channel 16 are independent of each other, and do not directly communicate in the internal channel of the housing. For example, the air inlet 9 of the first air supply channel 10 on the outside of the casing and the air inlet 1 of the second air supply channel 16 on the outside of the housing are respectively provided in different parts of the housing 2, and the first air supply channel 10 does not directly communicate with the second air supply channel 16. In this way, the air inlet 9 and the air inlet 1 are connected to external air sources of different pressures, so as to meet the working gas supply of the gas bearing that is more in line with the working conditions, and make the structure of the air supply channel simpler.
为了方便外部气源与进气口连接,减少外部的管路连接时的干涉问题,在一些实施例中,将第一供气流道10在所述壳体2上的进气口9与所述第二供气流道16在所述壳体2上的进气口1设置在壳体2的相反方向,例如设置在壳体2的下方和上方。In order to facilitate the connection between the external air source and the air inlet and reduce the interference problem when connecting the external piping, in some embodiments, the first air supply channel 10 on the housing 2 is connected to the air inlet 9 The air inlet 1 of the second air supply channel 16 on the housing 2 is disposed in the opposite direction of the housing 2, for example, below and above the housing 2.
在一些实施例中,所述压缩机被配置为允许从所述第一气体轴承和所述电机转子8的间隙流出,并经由所述电机定子3和所述电机转子8的间隙流动到所述电机定子3的第一侧的工作气体向所述壳体2外排出,所述电机定子3的第一侧为所述电机定子3在轴向上远离所述第一气体轴承的一侧。这样能够使外部输入压缩机的工作气体更容易的从压缩机内向外排出,以确保供气的稳定性,而不需要设置专门的收集工作气体的装置,从而优化压缩机的内部空间。另外,还能通过工作气体在定转子间隙的流动实现电机定子和电机转子的冷却作用。In some embodiments, the compressor is configured to allow outflow from the gap between the first gas bearing and the motor rotor 8 and flow to the via the gap between the motor stator 3 and the motor rotor 8 The working gas on the first side of the motor stator 3 is discharged to the outside of the housing 2. The first side of the motor stator 3 is the side of the motor stator 3 that is away from the first gas bearing in the axial direction. In this way, the working gas input from the outside of the compressor can be more easily discharged from the inside of the compressor to ensure the stability of the gas supply, without the need to provide a special device for collecting working gas, thereby optimizing the internal space of the compressor. In addition, the cooling effect of the motor stator and the motor rotor can also be achieved by the flow of working gas in the fixed rotor gap.
参考图1,在一些实施例中,压缩机还包括排气装置21(通过箭头进行示意)。参考图1中通过箭头表示气流流向的标识,排气装置21的吸气口位于所述壳体2内,其能够将从所述第一气体轴承和所述电机转子8的间隙流出,并经由所述电机定子3和所述电机转子8的间隙流动到所述电机定子3的第一侧(即电机定子3在轴向上远离所述第一气体轴承的一侧,对应于图1中的区域B)的工作气体排出到所述壳体2外。Referring to FIG. 1, in some embodiments, the compressor further includes an exhaust device 21 (indicated by arrows). Referring to the sign of the air flow direction indicated by arrows in FIG. 1, the suction port of the exhaust device 21 is located in the housing 2, which can flow out from the gap between the first gas bearing and the motor rotor 8 and pass through The gap between the motor stator 3 and the motor rotor 8 flows to the first side of the motor stator 3 (that is, the side of the motor stator 3 that is away from the first gas bearing in the axial direction, corresponding to FIG. 1 The working gas in the area B) is discharged outside the housing 2.
在图1中,壳体2与所述电机定子3之间设有冷却气体流道15。冷却气体流道 15的出口位于所述电机定子3的第二侧(即电机定子3在轴向上靠近所述第一气体轴承的一侧)。这样,进入冷却气体流道15的冷却气体能够从所述冷却气体流道15的出口流出,并与从所述第一气体轴承和所述电机转子8的间隙流出的工作气体在电机定子的第二侧(对应于图1中的区域A)混合,混合后的气体介质再经由所述电机定子3和所述电机转子8的间隙流动到所述电机定子3的第一侧(对应于图1中的区域B)。In FIG. 1, a cooling gas flow channel 15 is provided between the housing 2 and the motor stator 3. The outlet of the cooling gas flow channel 15 is located on the second side of the motor stator 3 (i.e., the side of the motor stator 3 near the first gas bearing in the axial direction). In this way, the cooling gas that enters the cooling gas flow channel 15 can flow out from the outlet of the cooling gas flow channel 15, and the working gas that flows out from the gap between the first gas bearing and the motor rotor 8 can The two sides (corresponding to area A in FIG. 1) are mixed, and the mixed gas medium flows to the first side of the motor stator 3 through the gap between the motor stator 3 and the motor rotor 8 (corresponding to FIG. 1) Area B).
冷却气体与工作气体混合后,在经过电机定子3和电机转子8之间时能够实现电机定子3和电机转子8的冷却作用,并且还能够被排气装置21吸收而向壳体外排出,从而使压缩机内外部的气体循环更加顺畅,确保压缩机内部工作的稳定性。在一些实施例中,冷却气体与工作气体为相同介质,在另一些实施例中,冷却气体与工作气体为不同介质。在一些实施例中,冷却气体与工作气体均为压缩机所压缩的冷媒。After the cooling gas and the working gas are mixed, the cooling effect of the motor stator 3 and the motor rotor 8 can be achieved when passing between the motor stator 3 and the motor rotor 8, and can also be absorbed by the exhaust device 21 and discharged to the outside of the housing, so that The gas circulation inside and outside the compressor is smoother, ensuring the stability of the internal working of the compressor. In some embodiments, the cooling gas and the working gas are the same medium, and in other embodiments, the cooling gas and the working gas are different media. In some embodiments, both the cooling gas and the working gas are refrigerant compressed by the compressor.
参考图1,在一些实施例中,压缩机包括两级叶轮,两级叶轮分别固定连接在电机转子8的两端,第一气体轴承中的第一推力气体轴承12、14和第一径向气体轴承11均设置在电机转子8上相对于一级叶轮19靠近二级叶轮20的一侧。而压缩机还包括第二气体轴承6,该第二气体轴承6则在二级叶轮20靠近第一叶轮19一侧的位置支撑所述电机转子8。在一些实施例中,第二气体轴承为静压气体轴承。Referring to FIG. 1, in some embodiments, the compressor includes a two-stage impeller. The two-stage impeller is fixedly connected to both ends of the rotor 8 of the motor. The first thrust gas bearings 12, 14 and the first radial direction in the first gas bearing The gas bearings 11 are arranged on the side of the motor rotor 8 close to the second-stage impeller 20 relative to the first-stage impeller 19. The compressor further includes a second gas bearing 6, which supports the motor rotor 8 at a position of the two-stage impeller 20 close to the first impeller 19 side. In some embodiments, the second gas bearing is a static pressure gas bearing.
为了安装第二气体轴承6,在一些实施例中,通过设置在壳体2内的轴承座5对所述第二气体轴承6进行支撑。供气流道还包括:设置在所述壳体2内的第三供气流道17。该第三供气流道17用于连接外部气源,并将所述外部气源提供的工作气体供应给所述第二气体轴承6。In order to install the second gas bearing 6, in some embodiments, the second gas bearing 6 is supported by the bearing seat 5 provided in the housing 2. The air supply channel further includes: a third air supply channel 17 disposed in the housing 2. The third air supply channel 17 is used to connect an external air source and supply working gas provided by the external air source to the second gas bearing 6.
考虑到同样作为径向气体轴承的第一径向气体轴承和第二气体轴承6的工况比较接近,在一些实施例中,使第三供气流道17与所述第二供气流道16相互连通,且共用壳体2上的同一进气口,以简化供气流道。Considering that the operating conditions of the first radial gas bearing and the second gas bearing 6 which are also radial gas bearings are relatively close, in some embodiments, the third gas supply channel 17 and the second gas supply channel 16 are mutually connected They are connected and share the same air inlet on the housing 2 to simplify the air supply channel.
参考图1-图3,在一些实施例中,供气流道10与所述第二气体轴承6连通(直接连通,或者经由轴承座5上开设的流道53连通),用于将所述外部气源提供的工作气体供应给所述第二气体轴承6。轴承座5具有设有用于支撑所述第二气体轴承6的轴承安装孔52,在所述轴承安装孔52与所述轴承座5靠近所述电机定子3一侧的表面之间设有通气孔组。Referring to FIGS. 1-3, in some embodiments, the gas supply passage 10 communicates with the second gas bearing 6 (directly communicated, or communicated via a flow passage 53 opened on the bearing seat 5), which is used to connect the external The working gas provided by the gas source is supplied to the second gas bearing 6. The bearing housing 5 has a bearing mounting hole 52 provided for supporting the second gas bearing 6, and a vent hole is provided between the bearing mounting hole 52 and a surface of the bearing housing 5 close to the motor stator 3 side group.
在一些实施例中,通气孔组包括沿所述轴承座5的周向上分布的至少一个通气孔51。通气孔组能够引导从所述第二气体轴承6和所述电机转子8的间隙流出的工作气 体流向所述轴承座5靠近所述电机定子3一侧的区域B。进入到区域B的工作气体能够被排气装置21吸收而排出壳体外。In some embodiments, the vent hole group includes at least one vent hole 51 distributed along the circumferential direction of the bearing seat 5. The vent hole group can guide the working gas flowing out from the gap between the second gas bearing 6 and the motor rotor 8 to flow to the area B of the bearing housing 5 close to the motor stator 3 side. The working gas entering the area B can be absorbed by the exhaust device 21 and discharged out of the casing.
参考图1,在一些实施例中,压缩机还包括:轴向密封机构,设置在所述电机转子8与所述轴承座5之间,用于在所述第二气体轴承6的轴向上的一侧形成密封作用。参考图4-图5,在一些实施例中,轴向密封机构包括:梳齿密封件7。梳齿密封件7套设在所述电机转子8上,并与所述轴承座5固定连接,在所述梳齿密封件7靠近所述第二气体轴承6一侧的凸缘74上设有通气槽组,所述通气槽组与所述通气孔组至少部分地连通。梳齿密封件7上还设有沿轴向排布的梳齿71和用于与轴承座5进行装配的装配孔72。Referring to FIG. 1, in some embodiments, the compressor further includes: an axial sealing mechanism, which is disposed between the motor rotor 8 and the bearing seat 5, and is used for the second gas bearing 6 in the axial direction The side of the seal is formed. 4-5, in some embodiments, the axial sealing mechanism includes: a comb-tooth seal 7. The comb-tooth seal 7 is sleeved on the motor rotor 8 and fixedly connected to the bearing housing 5. A flange 74 on the side of the comb-tooth seal 7 near the second gas bearing 6 is provided A vent slot group, the vent slot group is at least partially in communication with the vent hole group. The comb seal 7 is also provided with comb teeth 71 arranged in the axial direction and an assembly hole 72 for assembling with the bearing housing 5.
在一些实施例中,通气槽组包括沿所述梳齿密封件7的周向上分布的至少一个通气槽组,为了使从第二气体轴承6和电机转子8的间隙流出的工作气体顺利排出,在一些实施例中,使通气孔51的数量与通气槽71的数量相同,例如都是5个(或者都是3个或7个等),且各个通气槽71分别与各个通气孔51对齐。In some embodiments, the vent groove group includes at least one vent groove group distributed along the circumferential direction of the comb-tooth seal 7, in order to smoothly discharge the working gas flowing out from the gap between the second gas bearing 6 and the motor rotor 8, In some embodiments, the number of vent holes 51 is the same as the number of vent grooves 71, for example, 5 (or 3 or 7 all), and each vent groove 71 is aligned with each vent hole 51, respectively.
至此,已经详细描述了本公开的各实施例。为了避免遮蔽本公开的构思,没有描述本领域所公知的一些细节。本领域技术人员根据上面的描述,完全可以明白如何实施这里公开的技术方案。So far, the embodiments of the present disclosure have been described in detail. In order to avoid obscuring the concept of the present disclosure, some details known in the art are not described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.
虽然已经通过示例对本公开的一些特定实施例进行了详细说明,但是本领域的技术人员应该理解,以上示例仅是为了进行说明,而不是为了限制本公开的范围。本领域的技术人员应该理解,可在不脱离本公开的范围和精神的情况下,对以上实施例进行修改或者对部分技术特征进行等同替换。本公开的范围由所附权利要求来限定。Although some specific embodiments of the present disclosure have been described in detail through examples, those skilled in the art should understand that the above examples are only for illustration, not for limiting the scope of the present disclosure. Those skilled in the art should understand that the above embodiments can be modified or some technical features can be equivalently replaced without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.
Claims (15)
- 一种压缩机,包括:A compressor, including:壳体(2);Housing (2);电机定子(3),设置在所述壳体(2)内;The motor stator (3) is arranged in the housing (2);电机转子(8),设置在所述壳体(2)内;The motor rotor (8) is arranged in the housing (2);第一气体轴承,设置在所述壳体(2)内,并支撑所述电机转子(8);和A first gas bearing is provided in the housing (2) and supports the motor rotor (8); and供气流道,设置在所述壳体(2)内,用于连接外部气源,并将所述外部气源提供的工作气体供应给所述第一气体轴承;A gas supply channel is provided in the housing (2) for connecting an external gas source and supplying working gas provided by the external gas source to the first gas bearing;其中,所述压缩机被配置为允许从所述第一气体轴承和所述电机转子(8)的间隙流出,并经由所述电机定子(3)和所述电机转子(8)的间隙流动到所述电机定子(3)的第一侧的工作气体向所述壳体(2)外排出,所述电机定子(3)的第一侧为所述电机定子(3)在轴向上远离所述第一气体轴承的一侧。Wherein, the compressor is configured to allow outflow from the gap between the first gas bearing and the motor rotor (8) and flow to the gap through the gap between the motor stator (3) and the motor rotor (8) The working gas on the first side of the motor stator (3) is discharged out of the housing (2), and the first side of the motor stator (3) is that the motor stator (3) is away from Describe one side of the first gas bearing.
- 根据权利要求1所述的压缩机,其中在所述壳体(2)与所述电机定子(3)之间设有冷却气体流道(15),所述冷却气体流道(15)的出口位于所述电机定子(3)的第二侧,以便从所述冷却气体流道(15)的出口流出的冷却气体能够与从所述第一气体轴承和所述电机转子(8)的间隙流出的工作气体在所述电机定子(3)的第二侧混合,再经由所述电机定子(3)和所述电机转子(8)的间隙流动到所述电机定子(3)的第一侧;The compressor according to claim 1, wherein a cooling gas flow passage (15) is provided between the casing (2) and the motor stator (3), and an outlet of the cooling gas flow passage (15) Located on the second side of the motor stator (3) so that the cooling gas flowing out of the outlet of the cooling gas flow channel (15) can flow out from the gap between the first gas bearing and the motor rotor (8) Of the working gas is mixed on the second side of the motor stator (3), and then flows to the first side of the motor stator (3) via the gap between the motor stator (3) and the motor rotor (8);其中,所述电机定子(3)的第二侧为所述电机定子(3)在轴向上靠近所述第一气体轴承的一侧。Wherein, the second side of the motor stator (3) is the side of the motor stator (3) close to the first gas bearing in the axial direction.
- 根据权利要求1所述的压缩机,其中所述第一气体轴承包括:在轴向上支撑所述电机转子(8)的第一推力气体轴承(12,14)和在径向上支撑所述电机转子(8)的第一径向气体轴承(11);The compressor according to claim 1, wherein the first gas bearing includes: a first thrust gas bearing (12, 14) supporting the motor rotor (8) in the axial direction and supporting the motor in the radial direction The first radial gas bearing (11) of the rotor (8);所述供气流道包括:The air supply channel includes:第一供气流道(10),设置在所述壳体(2)内,用于连接外部气源,并将所述外部气源提供的工作气体供应给所述第一径向气体轴承(11);A first air supply channel (10) is provided in the housing (2) for connecting an external air source and supplying working gas provided by the external air source to the first radial gas bearing (11) );第二供气流道(16),设置在所述壳体(2)内,用于连接外部气源,并将所述外部气源提供的工作气体供应给所述第一推力气体轴承(12,14)。A second air supply channel (16) is provided in the housing (2) for connecting an external air source, and supplies working gas provided by the external air source to the first thrust gas bearing (12, 14).
- 根据权利要求3所述的压缩机,其中所述第一供气流道(10)与所述第二供 气流道(16)在所述壳体(2)内相互分隔设置。The compressor according to claim 3, wherein the first air flow path (10) and the second air flow path (16) are spaced apart from each other in the housing (2).
- 根据权利要求4所述的压缩机,其中所述第一供气流道(10)在所述壳体(2)上的进气口与所述第二供气流道(16)在所述壳体(2)上的进气口位于所述壳体(2)的相反方向。The compressor according to claim 4, wherein the air inlet of the first air supply passage (10) on the casing (2) and the second air supply passage (16) are on the casing The air inlet on (2) is located in the opposite direction of the housing (2).
- 根据权利要求3所述的压缩机,还包括:第二气体轴承(6),设置在所述壳体内,并支撑所述电机转子(8);The compressor according to claim 3, further comprising: a second gas bearing (6) provided in the housing and supporting the motor rotor (8);所述供气流道还包括:The air supply channel further includes:第三供气流道(17),设置在所述壳体(2)内,用于连接外部气源,并将所述外部气源提供的工作气体供应给所述第二气体轴承(6)。A third air supply channel (17) is provided in the housing (2) for connecting an external air source and supplying working gas provided by the external air source to the second gas bearing (6).
- 根据权利要求6所述的压缩机,其中所述第三供气流道(17)与所述第一供气流道(10)相互连通,且共用壳体(2)上的同一进气口。The compressor according to claim 6, wherein the third air supply channel (17) and the first air supply channel (10) communicate with each other and share the same air inlet on the casing (2).
- 根据权利要求1所述的压缩机,还包括:The compressor according to claim 1, further comprising:一级叶轮(19)和二级叶轮(20),分别与所述电机转子的两端固定连接;The first-level impeller (19) and the second-level impeller (20) are respectively fixedly connected to both ends of the rotor of the motor;第二气体轴承(6),设置在临近所述二级叶轮(20)的位置,并在径向上支撑所述电机转子(8);和A second gas bearing (6), which is arranged close to the secondary impeller (20) and supports the motor rotor (8) in the radial direction; and轴承座(5),设置在所述壳体(2)内,且对所述第二气体轴承(6)进行支撑;A bearing seat (5) is provided in the housing (2), and supports the second gas bearing (6);其中,所述供气流道还与所述第二气体轴承(6)连通,用于将所述外部气源提供的工作气体供应给所述第二气体轴承(6),所述轴承座(5)具有设有用于支撑所述第二气体轴承(6)的轴承安装孔(52),在所述轴承安装孔(52)与所述轴承座(5)靠近所述电机定子(3)一侧的表面之间设有通气孔组,用于引导从所述第二气体轴承(6)和所述电机转子(8)的间隙流出的工作气体流向所述轴承座(5)靠近所述电机定子(3)一侧。Wherein, the gas supply channel is also in communication with the second gas bearing (6) for supplying the working gas provided by the external gas source to the second gas bearing (6), the bearing seat (5 ) Has a bearing mounting hole (52) for supporting the second gas bearing (6), and the bearing mounting hole (52) and the bearing seat (5) are close to the motor stator (3) side Between the surfaces are provided with vent holes for guiding the working gas flowing out from the gap between the second gas bearing (6) and the motor rotor (8) to the bearing seat (5) close to the motor stator (3) One side.
- 根据权利要求8所述的压缩机,还包括:轴向密封机构,设置在所述电机转子(8)与所述轴承座(5)之间,用于在所述第二气体轴承(6)的轴向上的一侧形成密封作用。The compressor according to claim 8, further comprising: an axial sealing mechanism provided between the motor rotor (8) and the bearing housing (5) for the second gas bearing (6) One side of the axial direction forms a sealing effect.
- 根据权利要求9所述的压缩机,其中所述轴向密封机构包括:梳齿密封件(7),所述梳齿密封件(7)套设在所述电机转子(8)上,并与所述轴承座(5)固定连接,在所述梳齿密封件(7)靠近所述第二气体轴承(6)一侧的凸缘(74)上设有通气槽组,所述通气槽组与所述通气孔组至少部分地连通。The compressor according to claim 9, wherein the axial sealing mechanism includes: a comb-tooth seal (7), the comb-tooth seal (7) is sleeved on the motor rotor (8), and The bearing seat (5) is fixedly connected, and a vent groove group is provided on a flange (74) of the comb tooth seal (7) close to the second gas bearing (6) side, the vent groove group At least partially communicate with the vent group.
- 根据权利要求10所述的压缩机,其中所述通气孔组包括沿所述轴承座(5) 的周向上分布的至少一个通气孔(51),所述通气槽组包括沿所述梳齿密封件(7)的周向上分布的至少一个通气槽,所述通气孔(51)的数量与所述通气槽(71)的数量相同,且各个通气槽(71)分别与各个通气孔(51)对齐。The compressor according to claim 10, wherein the vent hole group includes at least one vent hole (51) distributed along the circumferential direction of the bearing housing (5), and the vent groove group includes a seal along the comb teeth At least one vent groove distributed in the circumferential direction of the piece (7), the number of the vent holes (51) is the same as the number of the vent grooves (71), and each vent groove (71) is separately from each vent hole (51) Align.
- 根据权利要求1所述的压缩机,其中所述压缩机为离心式压缩机。The compressor according to claim 1, wherein the compressor is a centrifugal compressor.
- 根据权利要求1所述的压缩机,其中所述第一气体轴承为静压气体轴承。The compressor of claim 1, wherein the first gas bearing is a static pressure gas bearing.
- 根据权利要求8所述的压缩机,其中所述第二气体轴承为静压气体轴承。The compressor according to claim 8, wherein the second gas bearing is a static pressure gas bearing.
- 根据权利要求1所述的压缩机,还包括:The compressor according to claim 1, further comprising:排气装置(21),其吸气口位于所述壳体(2)内,用于将从所述第一气体轴承和所述电机转子(8)的间隙流出,并经由所述电机定子(3)和所述电机转子(8)的间隙流动到所述电机定子(3)的第一侧的工作气体向所述壳体(2)外排出。The exhaust device (21), whose suction port is located in the housing (2), is used to flow out from the gap between the first gas bearing and the motor rotor (8) and pass through the motor stator ( 3) The working gas flowing to the first side of the motor stator (3) in the gap with the motor rotor (8) is discharged out of the housing (2).
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CN201811593234.6 | 2018-12-25 | ||
CN201811593234.6A CN111365254A (en) | 2018-12-25 | 2018-12-25 | Compressor for optimizing internal space |
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CN113123983A (en) * | 2021-04-07 | 2021-07-16 | 西安交通大学 | Two-stage high-speed centrifugal air compressor with double cooling systems for fuel cell |
CN114483611B (en) * | 2022-01-21 | 2024-02-13 | 扬州大学 | Main shaft structure of dynamic pressure floating ring and magnetic bearing supporting fuel cell air compressor |
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CN107634611A (en) * | 2017-10-18 | 2018-01-26 | 李记东 | Motor with novel cooling structure and include its fluid machinery |
CN108425862A (en) * | 2017-02-14 | 2018-08-21 | 丹佛斯公司 | Oil-free centrifugal compressor for being used in being applied in low capacity |
CN209340163U (en) * | 2018-12-25 | 2019-09-03 | 珠海格力电器股份有限公司 | Compressor for optimizing internal space |
-
2018
- 2018-12-25 CN CN201811593234.6A patent/CN111365254A/en active Pending
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- 2019-10-29 WO PCT/CN2019/113991 patent/WO2020134517A1/en active Application Filing
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US20140286599A1 (en) * | 2012-01-03 | 2014-09-25 | New Way Machine Components, Inc. | Air bearing for use as seal |
CN103326512A (en) * | 2013-05-16 | 2013-09-25 | 西安交通大学 | Centrifugal air compressor cooling structure driven by ultra-high-speed permanent magnet motor |
CN104948478A (en) * | 2014-03-26 | 2015-09-30 | 霍尼韦尔国际公司 | Electric motor-driven compressor having a heat shield forming a wall of a diffuser |
CN106015032A (en) * | 2016-06-28 | 2016-10-12 | 杭州万辰机电科技有限公司 | Centrifugal compressor |
CN108425862A (en) * | 2017-02-14 | 2018-08-21 | 丹佛斯公司 | Oil-free centrifugal compressor for being used in being applied in low capacity |
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