CN111795072A

CN111795072A - Gas bearing gas supply device and motor

Info

Publication number: CN111795072A
Application number: CN201910281298.0A
Authority: CN
Inventors: 刘增岳; 俞国新
Original assignee: Qingdao Haier Co Ltd; Qingdao Haier Smart Technology R&D Co Ltd
Current assignee: Qingdao Haier Co Ltd; Qingdao Haier Smart Technology R&D Co Ltd
Priority date: 2019-04-09
Filing date: 2019-04-09
Publication date: 2020-10-20
Anticipated expiration: 2039-04-09
Also published as: CN111795072B; WO2020207508A1

Abstract

The application relates to a gas bearing gas supply device, and belongs to the field of power machinery. The apparatus includes a passage disposed within the rotatable member, the passage communicating with the gas bearing and the supply source. By adopting the embodiment, the requirement on the pressure of the supply source for supplying gas to the gas bearing is reduced, namely the requirement on the external refrigerant pressurizing tank is reduced, the cost is reduced, the structure for supplying gas to the gas bearing is simplified, and the operation is more stable. The invention also discloses a motor.

Description

Gas bearing gas supply device and motor

Technical Field

The present application relates to the field of power machinery technology, and for example, to a gas bearing gas supply device and a motor.

Background

At present, the gas bearing can be roughly divided into a dynamic pressure gas bearing and a static pressure gas bearing, the static pressure gas bearing needs to provide higher gas pressure for the static pressure gas bearing to support the rotor in order to float the rotor, and also in the starting working stage of the dynamic pressure gas bearing, the rotor is contacted with the bearing, the rotor and the bearing are in mutual friction operation, abrasion is easily caused, high-pressure gas is often required to be introduced to support the rotor, and for supplying gas for the static pressure gas bearing and the dynamic pressure gas bearing in the starting working stage, an external refrigerant pressurizing tank is required to pressurize refrigerants, so that the pressure of gas supply is improved.

In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art: adding to system complexity and increasing cost.

Disclosure of Invention

The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview nor is intended to identify key/critical elements or to delineate the scope of such embodiments but rather as a prelude to the more detailed description that is presented later.

The embodiment of the disclosure provides a gas bearing gas supply device.

In some alternative embodiments, the gas bearing gas supply includes a passage disposed in the rotatable member, the passage communicating the gas bearing with the supply.

By adopting the optional embodiment, the gas is thrown to the gas bearing through the centrifugal force generated by the rotation of the rotatable part, so that the requirement on the pressure of a supply source for supplying gas to the gas bearing is reduced, namely, the requirement on an external refrigerant pressurizing tank is reduced, and the cost is reduced.

Optionally, the channel comprises a first channel and a second channel.

Optionally, the first channel is disposed at a central position of the rotatable member and is parallel to the rotatable member. With this alternative embodiment, the first channel is caused to rotate with the rotatable member, creating a centrifugal force within the first channel.

Optionally, the first passage communicates with a supply source and the second passage communicates the first passage with the gas bearing. By adopting the alternative embodiment, an airflow passage is formed through which the gas enters the second channel through the first channel and then enters the gas bearing, and the gas is subjected to centrifugal force in both the first channel and the second channel, so that the pressure of the centrifugal force on the gas can be increased, and the requirement on the pressure of the supply source is reduced.

Optionally, the second channel is provided with one or more outlets, and the outlets are evenly distributed over the surface of the rotatable member. Adopt this optional embodiment, the second passageway is through one or more export with the gas in the first passageway and gas bearing intercommunication, makes gas more even, improves the gas supply efficiency to gas bearing.

Optionally, the first channel and the second channel have a preset included angle therebetween. Adopt this optional embodiment, can change the angle of air feed according to different demands, improve the suitability.

Optionally, the preset included angle is 90 degrees. By adopting the optional embodiment, when the preset included angle is 90 degrees, the centrifugal force direction of the gas in the first channel is the same as the flowing direction of the gas in the second channel, so that the resistance is reduced, and the gas pressure generated by the centrifugal force is improved.

Optionally, a cavity is provided between the channel and the supply source, the cavity communicating the channel with the supply source. By adopting the optional embodiment, when the channel rotates along with the rotatable part, the supply source does not need to be directly communicated with the channel through the transition of the cavity, and the difficulty of communicating the supply source with the channel is reduced.

Optionally, the supply opens into the channel through the jet hole. By adopting the optional embodiment, the airflow with pressure is directly injected into the channel through the jet hole, the difficulty of communicating the supply source with the channel is reduced, and the efficiency is higher.

The embodiment of the disclosure provides a motor.

In some alternative embodiments, the motor comprises: the gas bearing gas supply apparatus of any preceding embodiment.

Some technical solutions provided by the embodiments of the present disclosure can achieve the following technical effects: the requirement on the pressure of a supply source for supplying gas to the gas bearing is reduced, namely the requirement on an external refrigerant pressurizing tank is reduced, the cost is reduced, the structure for supplying gas to the gas bearing is simplified, and the operation is more stable.

The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.

Drawings

One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the accompanying drawings and not in limitation thereof, in which elements having the same reference numeral designations are shown as like elements and not in limitation thereof, and wherein:

FIG. 1 is a schematic diagram of a gas bearing gas supply arrangement provided by an embodiment of the present disclosure;

FIG. 2 is an enlarged view of A;

FIG. 3 is a schematic cross-sectional view of an alternative embodiment of a rotatable member provided by embodiments of the present disclosure;

FIG. 4 is a schematic cross-sectional view of another alternative embodiment of a rotatable member provided by embodiments of the present disclosure;

FIG. 5 is an enlarged view of an alternative embodiment of a first passageway in a rotatable member provided by embodiments of the present disclosure;

FIG. 6 is a schematic view of an alternative embodiment of a rotatable member outlet provided by embodiments of the present disclosure;

FIG. 7 is a schematic view of another alternative embodiment of a rotatable member outlet provided by embodiments of the present disclosure;

FIG. 8 is a schematic view of an alternative embodiment of a gas compensator provided by an embodiment of the present disclosure;

fig. 9 is an enlarged view of B.

Detailed Description

So that the manner in which the features and elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.

The embodiment of the disclosure provides a gas bearing gas supply device.

Fig. 1 and 2 show an alternative embodiment of the gas bearing gas supply.

This alternative embodiment includes a passage 200 disposed within the rotatable member 100, the passage 200 communicating with the gas bearing 300 and the supply source.

With this alternative embodiment, the centrifugal force generated by the rotation of the rotatable member 100 throws the gas towards the gas bearing 300, reducing the demand on the supply source pressure of the gas bearing 300 gas supply, i.e. reducing the demand on the external refrigerant pressurization tank, reducing the cost.

Optionally, the channel 200 includes a first channel 201 and a second channel 202.

Optionally, the first channel 201 is disposed at a central position of the rotatable member 100 and is parallel to the rotatable member 100. With this alternative embodiment, the first channel 201 is rotated with the rotatable member 100, creating a centrifugal force within the first channel 201. The central position of the rotatable member 100 refers to the axis of rotation of the rotatable member 100, i.e. the first channel 201 is arranged on the axis of the rotatable member 100.

Alternatively, the rotatable member 100 may be understood as a structure supported by the gas bearing 300 for rotation, for example, a shaft connected to a rotor of an electric machine, or a shaft and rotor combination.

Optionally, the first passage 201 communicates with a supply source and the second passage 202 communicates the first passage 201 with the gas bearing 300. With this alternative embodiment, a gas flow path is formed through the first channel 201 into the second channel 202 and then into the gas bearing 300, and the gas is subjected to centrifugal forces in both the first channel 201 and the second channel 202, which increases the pressure of the centrifugal forces on the gas and reduces the demand on the supply pressure. One or more second passages 202 may be provided and communicate with the first passage 201, and may supply gas to one gas bearing, or supply gas to a plurality of gas bearings, a plurality being understood to be two or more.

Optionally, the first channel 201 and the second channel 202 have a predetermined included angle therebetween. Adopt this optional embodiment, can change the angle of air feed according to different demands, improve the suitability. The different requirements may be the requirements of the gas bearing supply port location, the gas bearing may be supplied from the inside or from the side.

Optionally, the preset included angle is 90 degrees. By adopting the optional embodiment, when the preset included angle is 90 degrees, the centrifugal force direction of the gas in the first channel 201 is the same as the flowing direction of the gas in the second channel 202, so that the resistance is reduced, and the gas supply pressure is increased.

Optionally, a cavity 400 is provided between the channel 200 and the supply, the cavity 400 communicating the channel 200 with the supply. With this alternative embodiment, the transition through the cavity 400 eliminates the need for the supply to communicate directly with the channel 200 as the channel 200 rotates with the rotatable member 100, reducing the difficulty of communicating the supply with the channel 200.

Optionally, the rotatable member 100 is provided with a thrust plate 401, one end of the cavity 400 is connected to the supply source, the other end is closed by the rotatable member 100 and the thrust plate 101 on the rotatable member 100, and one end of the rotatable member 100 is located in the cavity 400, so that the passage 200 in the rotatable member 100 can be connected to the cavity 400 without affecting the rotation of the rotatable member 100.

Optionally, the supply passes into the channel 200 through the jet hole 500. With this alternative embodiment, the pressurized air flow is injected directly into the channel 200 through the injection holes 500, which reduces the difficulty of communicating the supply source with the channel 200 and provides a higher efficiency. The jet hole 500 is connected to a supply source, which itself has pressure or adds a portion of pressure to the supply source, so that the supply source passes through the jet hole 500 quickly to form a high-speed flow column, which is directly injected into the channel, thereby increasing the pressure in the channel 200 and increasing the pressure delivered to the gas bearing 300.

Alternatively, the gas bearing 300 may be a static pressure gas bearing, and according to the requirement of the static pressure gas bearing for the gas supply pressure, the supply source is directly introduced into the channel 200 or is appropriately pressurized and then introduced into the channel 200, the static pressure gas bearing is supplied with gas, and the rotatable member 100 is lifted.

Alternatively, the gas bearing 300 may be a dynamic pressure gas bearing, and before the dynamic pressure gas bearing starts to work, the supply source is directly introduced into the channel 200 or is introduced into the channel 200 after being appropriately pressurized, the dynamic pressure gas bearing is supplied with gas, the rotatable member 100 is lifted, and after the rotatable member 100 rotates and a gas film is generated between the rotatable member 100 and the dynamic pressure gas bearing, the gas supply is stopped.

Alternatively, the supply source may supply gas into the channel 200. For example, a gaseous refrigerant is directly supplied.

Optionally, a liquid may also be introduced into the channel 200. For example, the liquid refrigerant is introduced into the channel 200, and since the channel 200 is located in the rotatable member 100, heat is generated to gasify along with the rotation of the rotatable member 100, the pressure increases after gasification, and the gas refrigerant formed after gasification is introduced into the gas bearing under the action of centrifugal force, so that the pressure requirement for supplying gas to the gas bearing can be met, and the refrigerant absorbs heat to cool the rotatable member 100, thereby inhibiting the temperature rise of the rotatable member 100.

Figures 3, 4, 5, 6 and 7 show an alternative embodiment of the rotatable member.

Alternatively, the second channel 202 is divergently arranged, one end is communicated with the first channel, the other end penetrates through the rotatable member 100, and an outlet 203 is formed on the surface of the rotatable member 100.

Optionally, the second channel 202 and the outlet 203 are provided in one or more numbers, and the outlet 203 is evenly distributed over the surface of the rotatable member 100 where the gas bearing 300 is mounted. With this alternative embodiment, the second channel 202 communicates the first channel 201 with the gas bearing 300 through the one or more outlets 203, which makes the gas supply more uniform and improves the gas supply efficiency to the gas bearing 300.

Optionally, the second channel 202 and the outlet 203 are provided in one or more, and the outlet 203 is irregularly distributed on the surface of the rotatable member 100 where the gas bearing 300 is mounted.

Alternatively, the second channel 202 is linear.

Optionally, the second channel 202 is arcuate.

Optionally, a fan guide blade 204 is disposed in the first channel 201, and the fan guide blade 204 guides the airflow to the second channel 202 along with the rotation of the rotatable member. With this alternative embodiment, the supply pressure to the gas bearing 300 may be increased by rotating the fan blade 204 to deliver air in the direction of the second channel 202.

Alternatively, the air guiding vane 204 is directly fixed in the first channel 202, and the fixing manner may be a plurality of fixing connection manners such as welding, screw fixing connection, and the like.

The embodiment of the disclosure provides a gas supplementing device.

Fig. 8 and 9 show an alternative embodiment of the air compensating device.

The alternative embodiment comprises a primary impeller 600 and a secondary impeller 700 which are arranged on a rotatable part 100, wherein the primary impeller 600 is communicated with the secondary impeller 700 through a flow passage 800; also included is a channel 200 disposed within the rotatable member 100, the channel 200 communicating with the flow channel 800 and the supply source.

By adopting the optional embodiment, the channel 200 in the rotatable part 100 is used for supplying air to the flow channel 800 between the primary impeller 600 and the secondary impeller 700, the space between the rotatable part 100 and the flow channel 200 is sufficient, the air supply structure can be simplified, and the installation difficulty can be reduced.

Alternatively, the rotatable member 100 may be understood as a structure that can rotate the first impeller 600 and the second impeller 700, for example, a rotating shaft connected to a rotor of the motor, or a combination of the rotating shaft and the rotor.

Optionally, the first channel 201 and the second channel 202 have a predetermined included angle therebetween. By adopting the optional embodiment, the air supplementing angle can be changed according to different requirements, and the applicability is improved. The different requirements can be according to the different requirements of the gas flow direction in the runner 800, and can be vertical to supplement gas, and the gas flow for supplementing gas can also be deflected to the gas flow direction in the runner 800.

Optionally, the preset included angle is 90 degrees. By adopting the optional embodiment, when the preset included angle is 90 degrees, the centrifugal force direction of the gas in the first channel 201 is the same as the flowing direction of the gas in the second channel 202, so that the resistance is reduced, and the pressure for supplementing gas is increased.

Optionally, the preset included angle is 45 degrees. With this alternative embodiment, the flow direction of the second channel 202 is deflected to one side of the flow direction in the flow channel 800, so that the gas supply is smoother. For example, the airflow direction in the flow channel 800 is from the first impeller 600 to the second impeller 700, and the 45 degree included angle is a direction deviated to one side of the second impeller 700, so that the second impeller 700 can absorb the airflow for supplementing air, and the stability of supplementing air is improved.

Optionally, the channel 200 is helical. By adopting the optional embodiment, when the spiral structure rotates along with the rotatable body rapidly, the force pushing to one side is generated, and the pressure for air supplement is increased.

Optionally, the channel 200 is cylindrical with smooth inner walls. With this alternative embodiment, the resistance created by the channel 200 is reduced.

Optionally, the flow channel 800 is a portion between the first impeller 600 and the second impeller 700, where an air inlet end is communicated with an air outlet end. For example, the air outlet end of the first impeller 600 communicates with the air inlet end of the second impeller 700 through the flow channel 800, and the flow direction of the gas in the flow channel 800 is from the first impeller 600 side to the second impeller 700 side. When the rotatable member 100 is started to rotate, the gas enters the flow passage 800 portion through the compression of the first impeller 600, and the gas flow supplemented with the gas is supplemented into the flow passage 800 through the passage 200 located inside the rotatable member 100, sucked together by the second impeller 700, and discharged after the two-stage compression.

The embodiment of the disclosure also provides a motor, which comprises the gas bearing gas supply device.

The embodiment of the disclosure also provides a compressor, which comprises the air supplement device and, or, the motor.

The above description and drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. The scope of the disclosed embodiments includes the full ambit of the claims, as well as all available equivalents of the claims. As used in this application, although the terms "first," "second," etc. may be used in this application to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, unless the meaning of the description changes, so long as all occurrences of the "first element" are renamed consistently and all occurrences of the "second element" are renamed consistently. The first and second elements are both elements, but may not be the same element. Furthermore, the words used in the specification are words of description only and are not intended to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Similarly, the term "and/or" as used in this application is meant to encompass any and all possible combinations of one or more of the associated listed. Furthermore, the terms "comprises" and/or "comprising," when used in this application, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method or apparatus that comprises the element. In this document, each embodiment may be described with emphasis on differences from other embodiments, and the same and similar parts between the respective embodiments may be referred to each other.

Those of skill in the art would appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software may depend upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the disclosed embodiments. It can be clearly understood by the skilled person that, for convenience and brevity of description, the specific working processes of the system, the apparatus and the unit described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the embodiments disclosed herein, the disclosed methods, products (including but not limited to devices, apparatuses, etc.) may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units may be merely a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form. The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to implement the present embodiment. In addition, functional units in the embodiments of the present disclosure may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

Claims

1. A gas bearing gas supply apparatus comprising a passage disposed in a rotatable member, the passage communicating between a gas bearing and a supply source.

2. The apparatus of claim 1, wherein the channel comprises a first channel and a second channel.

3. The device of claim 2, wherein the first channel is centrally disposed in the rotatable member and is parallel to the rotatable member.

4. The apparatus of claim 2, wherein the first passage communicates with a supply source and the second passage communicates the first passage with a gas bearing.

5. A device according to claim 4, wherein the second channel is provided with one or more outlets, and wherein the outlets are evenly distributed over the surface of the rotatable member.

6. The device of claim 2, wherein the first channel and the second channel have a predetermined included angle therebetween.

7. The device of claim 6, wherein the predetermined included angle is 90 degrees.

8. The apparatus of claim 1, wherein a cavity is provided between the channel and the supply, the cavity communicating the channel with the supply.

9. The device according to any one of claims 1 to 8, wherein the supply opens into the channel through a jet orifice.

10. An electrical machine comprising a device as claimed in any one of claims 1 to 9.