CN217270981U - Pneumatic suspension centrifugal refrigeration compressor and axial bearing cavity drainage structure thereof - Google Patents
Pneumatic suspension centrifugal refrigeration compressor and axial bearing cavity drainage structure thereof Download PDFInfo
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- CN217270981U CN217270981U CN202121225895.0U CN202121225895U CN217270981U CN 217270981 U CN217270981 U CN 217270981U CN 202121225895 U CN202121225895 U CN 202121225895U CN 217270981 U CN217270981 U CN 217270981U
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Abstract
The application discloses dynamic pressure gas suspension centrifugal refrigeration compressor and axial bearing cavity drainage structure thereof. The liquid discharge structure includes: the first end of the liquid drainage channel is communicated with the bearing cavity, the second end of the liquid drainage channel is communicated with the motor cavity, and the position of the first end is higher than that of the second end; and the one-way flow guide piece is positioned in the liquid drainage channel and guides the flow in the liquid drainage channel so as to enable the liquid refrigerant in the bearing cavity to flow to the motor cavity in a one-way mode. The technical problem that liquid cannot be drained from an axial bearing cavity of a dynamic pressure air suspension centrifugal refrigeration compressor in the related art is solved.
Description
Technical Field
The application relates to the technical field of compressors, in particular to a dynamic pressure air suspension centrifugal refrigeration compressor and an axial bearing cavity liquid drainage structure thereof.
Background
At present, a thrust disc of a dynamic pressure gas suspension centrifugal refrigeration compressor is positioned in a cavity of an axial bearing, when the compressor is stopped, condensed liquid refrigerant is easy to appear in the cavity of the axial bearing, when the liquid level of the refrigerant is higher than the lower surface of the thrust disc, the compressor is started up easily, the bearing surface is influenced by the liquid refrigerant, and a stable gas film cannot be formed, so that the performance of the compressor is influenced. Traditional dynamic pressure gas suspension centrifugal refrigeration compressor, this axial bearing chamber do not have special flowing back structure, perhaps directly with this cavity and motor chamber UNICOM, but direct UNICOM motor intracavity's liquid refrigerant refluxes easily to the bearing chamber when the start-up and causes the bearing operation unstability.
Aiming at the problem that the axial bearing cavity of the dynamic pressure suspension centrifugal refrigeration compressor in the related technology can not discharge liquid, an effective solution is not provided at present.
SUMMERY OF THE UTILITY MODEL
The main aim at of this application provides a dynamic pressure gas suspension centrifugal refrigeration compressor and axial bearing chamber flowing back structure thereof to solve the unable problem of flowing back that carries out in the dynamic pressure gas suspension centrifugal refrigeration compressor axial bearing chamber among the correlation technique.
In order to achieve the purpose, the application provides a dynamic pressure air suspension centrifugal refrigeration compressor and an axial bearing cavity liquid drainage structure thereof.
According to the application, dynamic pressure gas suspension centrifugal refrigeration compressor and axial bearing cavity drainage structure thereof include:
the first end of the liquid drainage channel is communicated with the bearing cavity, the second end of the liquid drainage channel is communicated with the motor cavity, and the position of the first end is higher than that of the second end;
and the one-way flow guide piece is positioned in the liquid drainage channel and guides the flow in the liquid drainage channel so as to enable the liquid refrigerant in the bearing cavity to flow to the motor cavity in a one-way mode.
Optionally, the liquid discharge channel comprises a primary orifice and a secondary orifice, the upper end of the primary orifice is communicated with the bearing cavity, the one-way flow guide member is positioned at the lower end of the primary orifice, one end of the secondary orifice is communicated with the lower end of the primary orifice, and the other end of the secondary orifice is communicated with the motor cavity.
Optionally, the primary orifice is a stepped hole, an inner bore diameter of an upper end hole of the stepped hole is smaller than an inner bore diameter of a lower end hole, the one-way flow guide member is located in the lower end hole, and one end of the secondary orifice is communicated with the lower end hole.
Optionally, the one-way flow guiding element includes a floating ball, a diameter of the floating ball is larger than an inner diameter of the upper end hole, and when a liquid level of the liquid refrigerant in the lower end hole is higher than a communication position where one end of the secondary orifice is communicated with the lower end hole, the floating ball is blocked between the upper end hole and the communication position to limit the liquid refrigerant in the motor cavity from flowing to the bearing cavity.
Optionally, the air compressor further comprises a plug, the lower end of the lower end hole is exposed out of the pneumatic air suspension centrifugal refrigeration compressor, and the plug is plugged at the lower end of the lower end hole.
Optionally, the secondary orifice is a stepped hole, an inner bore diameter of a small hole end of the stepped hole is smaller than an inner bore diameter of a large hole end, the small hole end is communicated with the lower end hole, and the inner bore diameter of the small hole end is smaller than the diameter of the floating ball.
Optionally, the motor further comprises an air return hole communicated with the motor cavity, the air return hole is located on one side of the motor cavity close to the liquid drainage channel, and the position of the air return hole communicated with the motor cavity is lower than the second end of the liquid drainage channel.
In a second aspect, the present application further provides a dynamic pressure gas suspension centrifugal refrigeration compressor, which includes the above-mentioned liquid drainage structure for the axial bearing cavity of the dynamic pressure gas suspension centrifugal refrigeration compressor.
Optionally, the device further comprises a housing, a primary impeller, a stepped shaft, a thrust disk, a first bearing body and a second bearing body;
the one-level impeller is installed one side of stepped shaft, the second bearing body sets up the casing with between the first bearing body, the first bearing body cup joints on the one-level impeller, the bearing chamber is located between the first bearing body and the second bearing body, the thrust dish is located the bearing chamber, the thrust dish with the second bearing body all cup joints on the stepped shaft, the motor chamber sets up in the casing, just the bearing chamber with the motor chamber is located between the second bearing body.
Optionally, the motor further comprises a motor stator and a motor rotor, wherein the motor rotor is arranged on the stepped shaft, the motor rotor and the stepped shaft can be constructed in an integrated manner, the motor stator is fixed in the shell, and the motor stator and the motor rotor are both located in the motor cavity.
In the embodiment of the application, provide a dynamic pressure suspension centrifugal refrigeration compressor and axial bearing cavity drainage structure thereof, through setting up: the first end of the liquid drainage channel is communicated with the bearing cavity, the second end of the liquid drainage channel is communicated with the motor cavity, and the position of the first end is higher than that of the second end; and the one-way flow guide piece is positioned in the liquid drainage channel and guides the flow in the liquid drainage channel so as to enable the liquid refrigerant in the bearing cavity to flow to the motor cavity in a one-way mode. Like this, because the position of the first end of flowing back passageway is higher than the position of second end for liquid refrigerant in the bearing cavity flows to the motor chamber through flowing back the passageway, again through the one-way water conservancy diversion spare of setting in flowing back the passageway, makes liquid refrigerant can't follow the motor chamber and flow back into the bearing cavity after the compressor start, thereby realizes the purpose of the effective flowing back of bearing cavity, has effectively guaranteed the normal operating of compressor. Therefore, the technical problem that liquid cannot be drained from the axial bearing cavity of the dynamic pressure suspension centrifugal refrigeration compressor in the related art is solved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, serve to provide a further understanding of the application and to enable other features, objects, and advantages of the application to be more apparent. The drawings and the description of the exemplary embodiments of the present application are provided for explaining the present application and do not constitute an undue limitation on the present application. In the drawings:
fig. 1 is a schematic structural diagram of a liquid discharge structure of an axial bearing cavity of a dynamic pressure suspension centrifugal refrigeration compressor provided in an embodiment of the present application.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the accompanying drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In this application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.
Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as the case may be.
Furthermore, the terms "mounted", "disposed", "provided", "connected", "slidably connected", "fixed", should be understood in a broad sense. For example, "connected" may be a fixed connection, a detachable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In addition, the term "plurality" shall mean two as well as more than two.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1, an embodiment of the present application provides a dynamic pressure air suspension centrifugal refrigeration compressor and an axial bearing cavity drainage structure thereof, including:
the first end of the liquid drainage channel is communicated with the bearing cavity 16, the second end of the liquid drainage channel is communicated with the motor cavity 17, and the position of the first end is higher than that of the second end;
and the one-way flow guide piece is positioned in the liquid drainage channel and guides the flow in the liquid drainage channel so as to enable the liquid refrigerant in the bearing cavity 16 to flow to the motor cavity 17 in a one-way mode.
Specifically, because the position of the first end of the liquid drainage channel is higher than the position of the second end, the liquid refrigerant in the bearing cavity 16 flows to the motor cavity 17 through the liquid drainage channel, and the liquid refrigerant cannot flow back into the bearing cavity 16 from the motor cavity 17 through the one-way flow guide piece arranged in the liquid drainage channel after the compressor is started, so that the purpose of effective liquid drainage of the bearing cavity 16 is realized, and the normal operation of the compressor is effectively ensured. Therefore, the technical problem that the axial bearing cavity 16 of the dynamic pressure air suspension centrifugal refrigeration compressor in the related art can not discharge liquid is solved.
Optionally, the liquid discharge channel comprises a primary orifice 11 and a secondary orifice 14, the upper end of the primary orifice 11 is communicated with the bearing cavity 16, the one-way flow guide is positioned at the lower end of the primary orifice 11, one end of the secondary orifice 14 is communicated with the lower end of the primary orifice 11, and the other end of the secondary orifice 14 is communicated with the motor cavity 17.
Specifically, the liquid refrigerant in the bearing chamber 16 enters the secondary orifice 14 through the primary orifice 11, and then enters the motor chamber 17 through the secondary orifice 14.
Optionally, the primary throttle hole 11 is a stepped hole, an inner bore diameter of an upper end hole of the stepped hole is smaller than an inner bore diameter of a lower end hole, the one-way flow guide member is located in the lower end hole, and one end of the secondary throttle hole 14 is communicated with the lower end hole.
Specifically, the primary throttle hole 11 is a stepped hole, and the one-way flow guide member is located in a lower end hole of the stepped hole, and an inner diameter of an upper end hole of the stepped hole is smaller than an inner diameter of the lower end hole, so that the one-way flow guide member does not enter the bearing cavity 16.
Specifically, the one-way flow guide member includes a floating ball 12, a diameter of the floating ball 12 is larger than an inner aperture of the upper end hole, and when a liquid level of the liquid refrigerant in the lower end hole is higher than a communication position at which one end of the secondary orifice 14 communicates with the lower end hole, the floating ball 12 is blocked between the upper end hole and the communication position to limit the liquid refrigerant in the motor cavity 17 from flowing to the bearing cavity 16.
The shape of the top of the lower end hole of the stepped hole is a curved surface matched with the floating ball 12, so that when the floating ball 12 floats to the top of the lower end hole, the surface of the floating ball 12 can be attached to the curved surface, and the floating ball 12 can better block the conduction of the lower end hole to the upper end hole. So that the floating ball 12 has the one-way conduction function of the one-way flow guide member.
Optionally, the refrigeration system further comprises a plug 13, the lower end of the lower end hole is exposed out of the pneumatic-pneumatic suspension centrifugal refrigeration compressor, and the plug 13 is plugged at the lower end of the lower end hole.
Specifically, the plug 13 is arranged, so that the floating ball 12 can be installed and the floating ball 12 can float in the lower end hole, the floating ball 12 has a one-way conduction function of the one-way flow guide piece, and the plug 13 can be opened to discharge liquid when manual liquid discharging is needed.
Optionally, the secondary orifice 14 is a stepped hole, the inner bore diameter of the small hole end of the stepped hole is smaller than that of the large hole end, the small hole end is communicated with the lower end hole, and the inner bore diameter of the small hole end is smaller than the diameter of the floating ball 12.
Specifically, the secondary orifice 14 is a stepped hole, which facilitates machining of the secondary orifice 14 and prevents the floating ball 12 from entering the motor cavity 17 through the secondary orifice 14.
Optionally, the air return hole 15 is communicated with the motor cavity 17, the air return hole 15 is located on one side of the motor cavity 17 close to the liquid drainage channel, and the position where the air return hole 15 is communicated with the motor cavity 17 is lower than the second end of the liquid drainage channel.
Specifically, the air return hole 15 is located on one side of the motor cavity 17 close to the liquid drainage channel, so that the liquid refrigerant discharged from the liquid drainage channel can be discharged out of the motor cavity 17 through the air return hole 15 in time, and the air return hole 15 is communicated with the evaporator, so that the liquid refrigerant can be recycled.
In a second aspect, the present application further provides a dynamic pressure gas suspension centrifugal refrigeration compressor, which includes the above-mentioned liquid drainage structure for the axial bearing cavity of the dynamic pressure gas suspension centrifugal refrigeration compressor.
Optionally, the device further comprises a housing 7, a primary impeller 1, a stepped shaft 6, a thrust disk 4, a first bearing body 2 and a second bearing body 3;
the first-stage impeller 1 is installed on one side of the stepped shaft 6, the second bearing body 3 is arranged between the shell 7 and the first bearing body 2, the first bearing body 2 is sleeved on the first-stage impeller 1, the bearing cavity 16 is arranged between the first bearing body 2 and the second bearing body 3, the thrust disc 4 is arranged in the bearing cavity 16, the thrust disc 4 and the second bearing body 3 are both sleeved on the stepped shaft 6, the motor cavity 17 is arranged in the shell 7, and the bearing cavity 16 and the motor cavity 17 are arranged between the second bearing body 3.
Wherein, the primary orifice 11 and the secondary orifice 14 are both arranged on the second bearing body 3, and the return air hole 15 is arranged on the shell 7.
Optionally, the electric vehicle further comprises a motor stator 5 and a motor rotor, wherein the motor rotor is arranged on the stepped shaft 6, the motor rotor and the stepped shaft 6 can be constructed in an integrated manner, the motor stator 5 is fixed in the housing 7, and the motor stator 5 and the motor rotor are both located in the motor cavity 17.
Optionally, the centrifugal impeller further comprises a radial bearing 8, a radial bearing mounting seat 9 and a secondary impeller 10, the secondary impeller 10 is mounted at one end of the stepped shaft 6, which is far away from the primary impeller 1, the radial bearing 8 and the radial bearing mounting seat 9 are both sleeved on the stepped shaft 6, the radial bearing mounting seat 9 is connected with the casing 7, and the radial bearing mounting seat 9 is located between the radial bearing 8 and the secondary impeller 10.
The working principle of the embodiment of the application is as follows:
when the compressor is stopped, the liquid refrigerant in the motor cavity 17 returns to the evaporator from the air return port, and when condensed liquid refrigerant exists in the bearing cavity 16, the liquid refrigerant can flow into the motor cavity 17 from the primary throttle hole 11 and the secondary throttle hole 14, so that the bearing operation instability caused by the liquid refrigerant existing in the bearing cavity 16 when the compressor is started is avoided;
when the compressor is started, under the condition that liquid refrigerant exists in the motor cavity 17, the floating ball 12 floats upwards to block the primary throttle hole 11 after the liquid refrigerant flows through the secondary throttle hole 14, so that the liquid refrigerant is prevented from entering the bearing cavity 16.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. The utility model provides a dynamic pressure gas suspension centrifugal refrigeration compressor axial bearing chamber flowing back structure which characterized in that includes:
the first end of the liquid drainage channel is communicated with the bearing cavity, the second end of the liquid drainage channel is communicated with the motor cavity, and the position of the first end is higher than that of the second end;
and the one-way flow guide piece is positioned in the liquid drainage channel and guides the flow in the liquid drainage channel so as to enable the liquid refrigerant in the bearing cavity to flow to the motor cavity in a one-way mode.
2. The axial bearing cavity drain structure of dynamic pressure gas suspension centrifugal refrigerating compressor as claimed in claim 1, wherein said drain passage comprises a primary orifice and a secondary orifice, the upper end of said primary orifice is communicated with said bearing cavity, said one-way flow guide member is located at the lower end of said primary orifice, one end of said secondary orifice is communicated with the lower end of said primary orifice, and the other end of said secondary orifice is communicated with said motor cavity.
3. The axial bearing cavity drainage structure of dynamic pressure gas suspension centrifugal refrigerating compressor as claimed in claim 2, wherein said primary orifice is a stepped hole, the inner diameter of the upper end hole of said stepped hole is smaller than the inner diameter of the lower end hole, said one-way flow guide member is located in said lower end hole, and one end of said secondary orifice is communicated with said lower end hole.
4. The axial bearing cavity drainage structure of a dynamic pressure suspension centrifugal refrigeration compressor as claimed in claim 3, wherein said one-way flow guiding element comprises a floating ball, the diameter of said floating ball is larger than the inner diameter of said upper end hole, when the liquid level of said liquid refrigerant in said lower end hole is higher than the communication position where one end of said secondary orifice is communicated with said lower end hole, said floating ball is blocked between said upper end hole and said communication position, so as to restrict the liquid refrigerant in said motor cavity from flowing to said bearing cavity.
5. The axial bearing cavity drainage structure of a dynamic pressure gas suspension centrifugal refrigeration compressor as claimed in claim 4, further comprising a plug, wherein the lower end of the lower end hole is exposed outside the dynamic pressure gas suspension centrifugal refrigeration compressor, and the plug is plugged at the lower end of the lower end hole.
6. The axial bearing cavity drain structure of dynamic pressure gas suspension centrifugal refrigerating compressor as claimed in claim 4, wherein said secondary orifice is a stepped hole, the inner bore diameter of the small hole end of said stepped hole is smaller than that of the large hole end, said small hole end is communicated with said lower end hole, and the inner bore diameter of said small hole end is smaller than the diameter of said floating ball.
7. The liquid discharge structure for the axial bearing cavity of a dynamic pressure air suspension centrifugal refrigeration compressor as claimed in claim 1, further comprising a gas return hole communicating with the motor cavity, wherein the gas return hole is located at a side of the motor cavity close to the liquid discharge channel, and the position where the gas return hole communicates with the motor cavity is lower than the second end of the liquid discharge channel.
8. A dynamic pressure air suspension centrifugal refrigeration compressor, characterized in that it comprises a dynamic pressure air suspension centrifugal refrigeration compressor axial bearing cavity drainage structure according to any one of claims 1 to 7.
9. The dynamic pressure gas suspension centrifugal refrigerant compressor according to claim 8, further comprising a housing, a primary impeller, a stepped shaft, a thrust disk, a first bearing body and a second bearing body;
the one-level impeller is installed one side of stepped shaft, the second bearing body sets up the casing with between the first bearing body, the first bearing body cup joints on the one-level impeller, the bearing chamber is located between the first bearing body and the second bearing body, the thrust dish is located the bearing chamber, the thrust dish with the second bearing body all cup joints on the stepped shaft, the motor chamber sets up in the casing, just the bearing chamber with the motor chamber is located between the second bearing body.
10. The dynamic pressure gas suspension centrifugal refrigerant compressor as claimed in claim 9, further comprising a motor stator and a motor rotor, wherein the motor rotor is disposed on the stepped shaft, the motor rotor is integrally constructed with the stepped shaft, the motor stator is fixed in the housing, and the motor stator and the motor rotor are both located in the motor cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121225895.0U CN217270981U (en) | 2021-06-02 | 2021-06-02 | Pneumatic suspension centrifugal refrigeration compressor and axial bearing cavity drainage structure thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121225895.0U CN217270981U (en) | 2021-06-02 | 2021-06-02 | Pneumatic suspension centrifugal refrigeration compressor and axial bearing cavity drainage structure thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217270981U true CN217270981U (en) | 2022-08-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121225895.0U Active CN217270981U (en) | 2021-06-02 | 2021-06-02 | Pneumatic suspension centrifugal refrigeration compressor and axial bearing cavity drainage structure thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217270981U (en) |
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2021
- 2021-06-02 CN CN202121225895.0U patent/CN217270981U/en active Active
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