Heat insulation cooling system and compressor

Abstract

The invention provides a heat insulation cooling system and a compressor, the heat insulation cooling system comprises a working medium channel, a cooling channel and a heat isolator, and the working medium channel is used for conveying a high-temperature and high-pressure working medium. The cooling channel is used for conveying a cooling medium, and the working medium channel is far away from the to-be-cooled object relative to the cooling channel. The thermal isolator is located between the working medium channel and the cooling channel, one part of the thermal isolator is used for constructing the working medium channel, and the other part of the thermal isolator is used for constructing the cooling channel. According to the heat insulation cooling system, the working medium channel, the heat isolator and the cooling channel are arranged in a concentrated mode, high-temperature isolation can be conducted on the to-be-cooled object of the compressor, axial transmission of heat of the high-temperature and high-pressure working medium is effectively reduced, stable operation of the compressor system is guaranteed, and the manufacturing cost of the compressor can be effectively reduced.

Description

Technical Field

[0001] This application relates to the field of compressor equipment technology, and more particularly to a heat insulation cooling system and a compressor. Background Technology

[0002] When the working medium in the compressor is a high-temperature and high-pressure medium, the medium and / or heat present during the transport of the medium in the preset medium channel inside the compressor may lead to problems such as leakage, transmission, and contamination to downstream components inside the compressor.

[0003] When the temperature of critical components inside the compressor exceeds their heat resistance, it can have adverse consequences, reducing the compressor's operational stability and efficiency. Summary of the Invention

[0004] In view of this, this application aims to provide a heat-insulating cooling system and compressor to solve the problem of high-temperature and high-pressure medium leakage inside the compressor in the related art, which reduces the operating stability and efficiency of the compressor.

[0005] In a first aspect, this application provides a thermally insulated cooling system for a compressor, the compressor including an object to be cooled. The thermally insulated cooling system includes a working fluid passage, a cooling passage, and a thermal isolator. The working fluid passage is used to transport a high-temperature, high-pressure working fluid. The cooling passage is used to transport a cooling medium, and the working fluid passage is disposed away from the object to be cooled relative to the cooling passage. The thermal isolator is located between the working fluid passage and the cooling passage, with a portion of the thermal isolator forming the working fluid passage and another portion forming the cooling passage.

[0006] In one possible implementation, the working fluid channel includes a working fluid inlet, the cooling channel includes a medium inlet, and a thermal isolator is disposed near the working fluid inlet and the medium inlet.

[0007] In one possible implementation, the thermal insulator includes at least one vacuum chamber.

[0008] In one possible implementation, the thermal insulation cooling system further includes an end tooth seal, which is disposed on at least one axial end face of the thermal isolator.

[0009] In one possible implementation, the thermal insulation cooling system further includes a honeycomb seal disposed on at least one radial end face of the thermal insulator.

[0010] In one possible implementation, the thermal insulation cooling system further includes a main shaft, a first impeller, and a second impeller, with a thermal isolator located on the radial side of the main shaft. The first impeller rotates synchronously with the main shaft, is located on the axial side of the thermal isolator, and its blades are located within the working fluid channel. The second impeller rotates synchronously with the main shaft, is located on the axial side of the thermal isolator, and its blades are located within the cooling channel.

[0011] In one possible implementation, an installation space is formed between the main shaft, the first impeller, and the second impeller, and the thermal isolator is located within the installation space.

[0012] In one possible implementation, the thermal isolator is sealed to either the main shaft, the first impeller, or the second impeller.

[0013] In one possible implementation, the cooling medium includes a cooling gas.

[0014] Secondly, this application provides a compressor, including a motor assembly and a heat-insulating cooling system provided in any of the above embodiments. The motor assembly generates heat and is disposed on the side of the cooling channel away from the working fluid channel.

[0015] Compared with the prior art, the beneficial effects of this application are: In this application, a thermal isolator is located between the working fluid channel and the cooling channel. One part of the thermal isolator is used to construct the working fluid channel, and another part is used to construct the cooling channel. The heat generated by the high-temperature, high-pressure working fluid in the working fluid channel is first blocked by the thermal isolator as it is transferred axially. Simultaneously, the cooling medium in the cooling channel continuously flows, carrying away as much heat as possible from the thermal isolator and minimizing further axial heat transfer. This provides temperature protection for the components within the compressor, keeping the temperature of the space containing these components below their heat resistance temperature, thus ensuring the compressor's operational stability and efficiency.

[0016] The thermal insulation and cooling system provided in this application has a centralized arrangement of the working fluid channel, thermal isolator, and cooling channel, which can isolate the heat-dissipating object of the compressor at high temperatures, effectively reduce the heat transfer of the high-temperature and high-pressure working fluid along the axial direction, ensure the stable operation of the compressor system, and effectively reduce the manufacturing cost of the compressor.

[0017] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the heat insulation cooling system provided in the embodiments of this application; Figure 2 One of the schematic diagrams of a thermal insulator provided in one embodiment of this application; Figure 3 A second schematic diagram of the structure of a thermal insulator provided for one embodiment of this application; Figure 4 CFX numerical simulation results of a simplified model of a thermal insulation cooling system provided for one embodiment of this application.

[0020] Explanation of reference numerals in the attached figures: 1 working medium channel, 10 working medium inlets 2 cooling channels, 20 medium inlet 3 thermal insulator, 30 vacuum chamber, 31 end tooth seal, 32 honeycomb seal. 4. Main shaft, 5. First impeller, 6. Second impeller. Detailed Implementation

[0021] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0023] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0024] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0025] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0026] In a first aspect, this application provides a thermal insulation cooling system for a compressor, the compressor including a component to be cooled. The compressor includes a centrifugal compressor. The component to be cooled is a critical structural component inside the compressor, for example, a motor assembly.

[0027] Among them, such as Figure 1 As shown, the thermal insulation cooling system includes a working fluid channel 1, a cooling channel 2, and a thermal isolator 3. Specifically, the working fluid channel 1 is used to transport a high-temperature, high-pressure working fluid. For example, the thermodynamic temperature of the high-temperature, high-pressure working fluid is above 700K. Specifically, the high-temperature, high-pressure working fluid is a 773K high-temperature working fluid. Depending on the application of the compressor, the high-temperature, high-pressure working fluid can be selected from high-pressure water / steam, helium, carbon dioxide, molten salt, or liquid metal.

[0028] Specifically, cooling channel 2 is used to transport cooling medium. The cooling medium may include at least one of cooling liquid and cooling gas.

[0029] The working fluid channel 1 is positioned away from the object to be cooled relative to the cooling channel 2. In other words, the working fluid channel 1, the thermal isolator 3, the cooling channel 2, and the motor assembly are distributed sequentially along the compressor's axial direction.

[0030] The thermal isolator 3 is located between the working fluid channel 1 and the cooling channel 2. Part of the thermal isolator 3 is used to construct the working fluid channel 1, and another part is used to construct the cooling channel 2. The heat generated by the high-temperature and high-pressure working fluid in the working fluid channel 1 is first blocked by the thermal isolator 3 when it is transferred axially. At the same time, the cooling medium in the cooling channel 2 will continue to flow, carrying away as much heat as possible from the thermal isolator 3, and minimizing the continued axial transfer of heat. This provides temperature protection for the object to be cooled inside the compressor, keeping the temperature in the space where the object is located below its heat resistance temperature, thus ensuring the stability and efficiency of the compressor operation.

[0031] The heat insulation and cooling system provided in this application has a working fluid channel 1, a thermal isolator 3 and a cooling channel 2 centrally arranged, which can isolate the heat-dissipating object of the compressor at high temperature, effectively reduce the heat transfer of the high-temperature and high-pressure working fluid along the axial direction, ensure the stable operation of the compressor system, and effectively reduce the manufacturing cost of the compressor.

[0032] In one possible implementation, such as Figure 1 As shown, the working medium channel 1 includes a working medium inlet 10, and the high-temperature and high-pressure working medium flows into the working medium channel 1 from the working medium inlet 10.

[0033] The cooling channel 2 includes a medium inlet 20, through which the cooling medium flows into the cooling channel 2.

[0034] It should be noted that the temperature of the high-temperature and high-pressure working fluid is highest at the working fluid inlet 10, meaning that the heat is highest at the working fluid inlet 10. At this time, by placing the thermal isolator 3 close to the working fluid inlet 10 and the medium inlet 20, the thermal isolator 3 can effectively block the heat at the heat accumulation point and can effectively cool it through the low-temperature medium at the medium inlet 20, thereby enhancing the cooling effect and significantly isolating the heat transfer along the axial direction.

[0035] In one possible implementation, such as Figure 2 and Figure 3 As shown, the thermal insulator 3 includes at least one vacuum chamber 30. Because there is no gas molecule flow within the vacuum chamber 30, it has high thermal resistance, poor thermal conductivity, and good insulation performance, effectively reducing heat transfer from the high-temperature end to the low-temperature end. Specifically, the vacuum chamber 30 is an annular cavity.

[0036] In one possible implementation, such as Figure 2 and Figure 3 As shown, the thermal insulation cooling system also includes an end tooth seal 31, which is disposed on at least one axial end face of the thermal isolator 3.

[0037] In one possible implementation, such as Figure 2 and Figure 3 As shown, the thermal insulation cooling system also includes a honeycomb seal 32, which is disposed on at least one radial end face of the thermal insulator 3. It is worth noting that the honeycomb seal 32 can also be a labyrinth seal.

[0038] With the cooperation of the end tooth sealing part 31 and the honeycomb sealing part 32, the leakage of high-temperature gas can be effectively reduced by deceleration and pressure reduction, thereby reducing the heat transfer along the axial direction towards the motor assembly.

[0039] In one possible implementation, such as Figure 1 As shown, the heat insulation cooling system also includes a main shaft 4, a first impeller 5, and a second impeller 6, with a thermal isolator 3 located on the radial side of the main shaft 4.

[0040] The first impeller 5 rotates synchronously with the main shaft 4. The first impeller 5 is located on one axial side of the thermal isolator 3, and the blades of the first impeller 5 are located inside the working fluid channel 1. The first impeller 5 is the main impeller.

[0041] The second impeller 6 rotates synchronously with the main shaft 4. The second impeller 6 is located on the other side of the axial direction of the thermal isolator 3, and its blades are located within the cooling channel 2. The second impeller 6 is a coolant impeller.

[0042] The first impeller 5 and the second impeller 6 are coaxial and driven together. When the main shaft 4 rotates, the first impeller 5 and the second impeller 6 will rotate synchronously.

[0043] It is worth noting that the second impeller 6 and the first impeller 5 are coaxially mounted back to back. Their functions include, but are not limited to: drawing in cooling gas by rotating, and the cooling gas entering axially can effectively reduce the temperature of the main shaft 4 connected to the high-temperature first impeller 5; effectively reducing the wall temperature of the thermal isolator 3 near the second impeller 6; the second impeller 6 can effectively increase the pressure of the cooling gas, and the leakage gas from the second impeller 6 and the leakage gas from the first impeller 5 can reach pressure balance after being decelerated and depressurized by the sealing system (end tooth seal, labyrinth / honeycomb seal), thereby reducing the heat transfer caused by the flow of leakage gas.

[0044] like Figure 4 As shown, the simplified CFX numerical simulation results of the thermal insulation cooling system provided in this application, due to the very small leakage, simplify the sealing system and assume no working fluid leakage within the channel. Figure 4 It can be seen that the working fluid in the five working fluid channels 1 of the first impeller is a high-temperature working fluid of 773K. The heat transfer of the high-temperature working fluid can be effectively reduced by the heat insulation and cooling system.

[0045] In one possible implementation, an installation space is formed between the main shaft 4, the first impeller 5, and the second impeller 6, with at least a portion of the thermal isolator 3 located within this space, thereby facilitating the positioning and assembly of the thermal isolator 3. Specifically, the installation space is an installation groove.

[0046] In one possible implementation, the thermal isolator 3 is sealed to any one of the main shaft 4, the first impeller 5, and the second impeller 6.

[0047] It is worth noting that the thermal isolator 3 includes a first axial end face and a second axial end face that are distributed along the axial direction and are opposite to each other. The first impeller 5 is connected to the first axial end face of the thermal isolator 3 by a toothed seal. The second impeller 6 is connected to the second axial end face of the thermal isolator 3 by a toothed seal. The main shaft 4 is connected to the thermal isolator 3 by a honeycomb / labyrinth seal.

[0048] In one possible implementation, the cooling medium includes a cooling gas.

[0049] Secondly, this application provides a compressor, including a motor assembly and a heat-insulating cooling system provided in any of the above embodiments. The motor assembly generates heat and is disposed on the side of the cooling channel 2 away from the working fluid channel 1.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A thermal insulation cooling system for a compressor, said compressor comprising an object to be cooled, characterized in that, include: Working medium channel, used to transport high-temperature and high-pressure working medium; A cooling channel is used to transport a cooling medium, and the working medium channel is located away from the object to be cooled relative to the cooling channel; A thermal isolator is located between the working fluid channel and the cooling channel, with a portion of the thermal isolator used to construct the working fluid channel and another portion of the thermal isolator used to construct the cooling channel.

2. The heat insulation cooling system according to claim 1, characterized in that, The working fluid channel includes a working fluid inlet, the cooling channel includes a medium inlet, and the thermal isolator is disposed near the working fluid inlet and the medium inlet.

3. The heat insulation and cooling system according to claim 1, characterized in that, The thermal isolator includes at least one vacuum chamber.

4. The heat insulation and cooling system according to claim 1, characterized in that, The thermal insulation cooling system also includes: An end-tooth seal is provided on at least one axial end face of the thermal isolator.

5. The heat insulation cooling system according to claim 1, characterized in that, The thermal insulation cooling system also includes: A honeycomb seal is disposed on at least one radial end face of the thermal insulator.

6. The heat insulation and cooling system according to claim 1, characterized in that, The thermal insulation cooling system also includes: The main shaft, wherein the thermal isolator is disposed on the radial side of the main shaft; The first impeller rotates synchronously with the main shaft. The first impeller is located on one axial side of the thermal isolator, and the blades of the first impeller are located within the working fluid channel. The second impeller rotates synchronously with the main shaft. The second impeller is located on the other side of the axial direction of the thermal isolator, and the blades of the second impeller are located in the cooling channel.

7. The heat insulation cooling system according to claim 6, characterized in that, An installation space is formed between the main shaft, the first impeller, and the second impeller, and at least a portion of the thermal isolator is located within the installation space.

8. The heat-insulating cooling system according to claim 6, characterized in that, The thermal isolator is sealed to any one of the main shaft, the first impeller, and the second impeller.

9. The heat insulation cooling system according to claim 2, characterized in that, The cooling medium includes cooling gas.

10. A compressor, characterized in that, include: Motor assembly, which generates heat; as well as The thermal insulation cooling system according to any one of claims 1 to 9, wherein the motor assembly is disposed on the side of the cooling channel away from the working fluid channel.

Images