A cooling plate structure for a magnetic bearing controller

Abstract

The utility model relates to a kind of cooling plate structure for magnetic suspension bearing controller, including cooling plate, and inlet and outlet are arranged along diagonal on cooling plate, and cooling flow channel is communicated between inlet and outlet, which is set in the inside of cooling plate, cooling flow channel is composed of several mutually intersecting communication horizontal, vertical cooling flow channel, to facilitate refrigerant circulation, cooling plate can be placed in closed space, which can avoid the risk caused by condensate water and dust;Inlet and outlet are arranged at diagonal, and several mutually intersecting communication horizontal, vertical cooling flow channel make the whole cooling path course "S" shape, which is conducive to increasing the flow area of cooling, enhancing cooling effect;It is conducive to making refrigerant flow along the designed flow channel, improving the efficiency of cooling;It is conducive to temperature control of bearing controller, so that it keeps running in the optimum temperature range;It is conducive to long-term stable operation of magnetic suspension centrifuge.

Description

Technical Field

[0001] This utility model relates to a cooling plate structure for a magnetic levitation bearing controller, and relates to the field of magnetic levitation centrifugal compressor technology. Background Technology

[0002] The main difference between a magnetic levitation centrifugal compressor and other centrifuges lies in the fact that the motor of a magnetic levitation centrifugal compressor uses a magnetic levitation bearing. Magnetic levitation bearings require a matching bearing controller. Since the bearing controller is electrically driven, it generates heat during operation. As the heat gradually accumulates, the temperature of the bearing controller gradually rises. When the temperature reaches the bearing controller's protection threshold, the controller will activate its protection program and stop operating, thus causing the magnetic levitation centrifuge to stop working. Therefore, the bearing controller needs to be cooled during operation.

[0003] Most bearing controllers on the market use air cooling. Since air cooling requires air circulation, it cannot be achieved in a closed space. In this case, there is a risk of condensation on the bearing control board. At the same time, after long-term operation, dust will accumulate on the bearing control board. All of these problems can cause the circuit system of the bearing control board to malfunction, which in turn will prevent the magnetic levitation compressor from operating normally.

[0004] Therefore, the above cooling solutions pose significant risks and are not conducive to the long-term stable operation of the compressor. Utility Model Content

[0005] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is to provide a cooling plate structure for a magnetic levitation bearing controller.

[0006] To solve the above-mentioned technical problems, the technical solution of this utility model is: a cooling plate structure for a magnetic levitation bearing controller, including a cooling plate, wherein an inlet and an outlet are arranged diagonally along the upper edge of the cooling plate, and a cooling channel opened inside the cooling plate is connected between the inlet and the outlet. The cooling channel is composed of several intersecting and interconnected horizontal and vertical cooling channels to facilitate the flow of refrigerant.

[0007] Preferably, the drilled inlets on the periphery of the cooling plate form flow channel sealing openings for the horizontal and vertical cooling channels.

[0008] Preferably, each of the flow channel sealing ports is screwed with a plug.

[0009] Preferably, all the plugs are made of metal, and the plugs and the flow channel sealing openings are screwed together by NPT threads.

[0010] Preferably, the liquid inlet is located at the lower right corner of the cooling plate, and the liquid outlet is located at the upper left corner of the cooling plate.

[0011] Preferably, the cooling plate is integrally formed.

[0012] Preferably, the liquid inlet is not directly connected to the longitudinal cooling channel, but is first connected to the transverse cooling channel.

[0013] Preferably, the longitudinal cooling channels are arranged in the lower left and upper right corner regions of the cooling plate.

[0014] Preferably, bearing controller mounting holes are provided in the upper, middle and lower regions of the cooling plate.

[0015] Preferably, the cooling plate is provided with an airtight interface that connects to the cooling channel, and the connection direction of the airtight interface is the same as the installation direction of the bearing controller, which facilitates the connection of subsequent airtight pipelines.

[0016] Compared with the prior art, this utility model has the following advantages: the cooling plate structure of the magnetic levitation bearing controller is used for cooling with refrigerant, so the cooling plate can be placed in a closed space, thus avoiding the risks caused by condensate and dust; the liquid inlet and outlet are set diagonally, and several intersecting horizontal and vertical cooling channels make the overall cooling path resemble an "S" shape, which is conducive to increasing the cooling flow area and enhancing the cooling effect; it is conducive to allowing the refrigerant to flow along the designed channels, improving the cooling efficiency; it is conducive to the temperature control of the bearing controller, keeping it operating within the optimal temperature range; and it is conducive to the long-term stable operation of the magnetic levitation centrifuge.

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model. Figure 1 .

[0019] Figure 2 This is a schematic diagram of the structure of an embodiment of the present utility model. Figure 2 .

[0020] In the diagram: 1. Cooling plate; 2. Liquid inlet; 3. Liquid outlet; 4. Horizontal cooling channel; 5. Vertical cooling channel; 6. Channel sealing port; 7. Airtight interface; 8. Bearing controller mounting hole. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0023] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0024] like Figures 1-2 As shown, this embodiment provides a cooling plate structure for a magnetic levitation bearing controller, including a cooling plate 1. An inlet 2 and an outlet 3 are arranged diagonally along the upper edge of the cooling plate. A cooling channel is connected between the inlet and the outlet and is formed inside the cooling plate. The cooling channel is composed of several intersecting and interconnected horizontal and vertical cooling channels to facilitate the flow of refrigerant.

[0025] The diagonal arrangement of the inlet and outlet can significantly lengthen the refrigerant flow path and allow the refrigerant to better fill the entire cooling plate.

[0026] The cross arrangement of the transverse cooling channels 4 and the longitudinal cooling channels 5 can significantly increase the cooling area and make the flow path resemble an "S" shape. This can avoid the problem that the refrigerant flows along a short path, causing the cooling plate to only achieve local cooling and fail to achieve the optimal cooling effect.

[0027] In this embodiment of the utility model, the drilled inlets on the periphery of the cooling plate of the horizontal and vertical cooling channels form channel sealing openings 6.

[0028] In this embodiment of the invention, each flow channel sealing port is screwed with a plug.

[0029] In this embodiment of the utility model, the plugs are all made of all-metal material, and the plugs and the flow channel sealing openings are screwed together by NPT threads, which makes the sealing simple, stable and reliable.

[0030] NPT threads offer more stable and reliable sealing performance compared to O-rings or gaskets, significantly reducing the risk of refrigerant leakage from the cooling plate. The service life of NPT threaded metal plugs is far longer than that of rubber or plastic parts such as O-rings or gaskets, eliminating vulnerable parts in the entire cooling plate structure and greatly extending its service life.

[0031] In this embodiment of the invention, the liquid inlet is located at the lower right corner of the cooling plate, and the liquid outlet is located at the upper left corner of the cooling plate. The liquid outlet has only one connected flow channel, so that the refrigerant must travel along a specific cooling flow channel before reaching the liquid outlet.

[0032] In this embodiment of the utility model, the cooling plate is integrally formed.

[0033] If the cooling plate is not integrally molded, the usual practice is to divide it into upper and lower plates. Cooling channels are machined directly onto the adjacent surfaces of the two plates, and then the adjacent surfaces of the two plates are sealed with gaskets or O-rings and secured with a ring of screws to ensure a tight seal. This allows the refrigerant to flow along the designed cooling channels for optimal cooling. However, this approach has significant drawbacks. The refrigerant, typically introduced from the condenser at high pressure, pushes up the upper and lower plates upon entering the cooling channel cavity. This creates a straight channel between the plates, preventing the refrigerant from flowing along the designed cooling channels. Instead, the refrigerant flows through the bulging cavity between the plates, following a path of less resistance and shorter distance. This significantly reduces the cooling effect, ultimately causing the bearing controller to fail to cool properly and the compressor to malfunction. Furthermore, the pressure-induced bulging between the upper and lower plates greatly increases the risk of refrigerant leakage.

[0034] Therefore, in this embodiment of the utility model, the cooling plate is integrally formed, and the horizontal and vertical cooling channels are directly formed by drilling. It does not need to be divided into upper and lower plates, nor does it need to be complicated by milling the cooling channels. This helps to reduce the processing difficulty of the cooling plate and reduce the overall number of parts of the cooling plate; it helps to simplify the cooling structure and reduce the risk of refrigerant leakage; it helps to eliminate vulnerable parts such as O-rings and gaskets, and significantly extend the life of the cooling plate structure.

[0035] In this embodiment of the invention, the liquid inlet is not directly connected to the longitudinal cooling channel, but is first connected to the transverse cooling channel. The refrigerant needs to flow to the left before it can continue to flow upward.

[0036] In this embodiment of the invention, the transverse cooling channels cover the entire cooling plate, while the longitudinal cooling channels are only arranged in the lower left and upper right corners of the cooling plate.

[0037] In this embodiment of the utility model, bearing controller mounting holes 8 are provided in the upper, middle and lower regions of the cooling plate surface, which facilitates better contact between the bearing controller and the cooling plate and improves the cooling effect.

[0038] In this embodiment of the invention, the cooling plate is provided with an airtight interface 7 that connects to the cooling flow channel, allowing for an airtightness test after all connections are completed to ensure that the cooling plate structure does not leak refrigerant. The airtight interface can also be connected to an NPT threaded plug.

[0039] In this embodiment of the invention, the connection direction of the airtight interface is the same as the installation direction of the bearing controller, which facilitates the subsequent connection of the airtight pipeline.

[0040] In this embodiment of the invention, the cooling plate is made of aluminum, which has good thermal conductivity and provides sufficient cooling for the bearing controller.

[0041] This magnetic levitation bearing controller uses a cooling plate structure for refrigerant cooling, allowing the cooling plate to be placed in a sealed space, thus avoiding the risks posed by condensate and dust. The inlet and outlet are positioned diagonally, and several interconnected transverse and longitudinal cooling channels create an "S"-shaped cooling path, which increases the cooling flow area and enhances the cooling effect. This also facilitates refrigerant flow along the designed channels, improving cooling efficiency; it aids in temperature control of the bearing controller, keeping it within its optimal operating range; and it contributes to the long-term stable operation of the magnetic levitation centrifuge.

[0042] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from its technical solution shall still fall within the protection scope of this utility model.

Claims

1. A cooling plate structure for a magnetic levitation bearing controller, characterized in that: It includes a cooling plate with an inlet and an outlet arranged diagonally along its length. A cooling channel is connected between the inlet and outlet and is formed inside the cooling plate. The cooling channel consists of several intersecting and interconnected horizontal and vertical cooling channels to facilitate the flow of refrigerant.

2. The cooling plate structure for a magnetic levitation bearing controller according to claim 1, characterized in that: The horizontal and vertical cooling channels form channel sealing openings at the drilled inlets on the periphery of the cooling plate.

3. The cooling plate structure for a magnetic levitation bearing controller according to claim 2, characterized in that: Each of the flow channel sealing ports is screwed with a plug.

4. The cooling plate structure for a magnetic levitation bearing controller according to claim 3, characterized in that: All plugs are made of metal, and the plugs and the flow channel sealing openings are connected to each other by NPT threads.

5. The cooling plate structure for a magnetic levitation bearing controller according to claim 1, characterized in that: The liquid inlet is located at the lower right corner of the cooling plate, and the liquid outlet is located at the upper left corner of the cooling plate.

6. The cooling plate structure for a magnetic levitation bearing controller according to claim 1, characterized in that: The cooling plate is integrally formed.

7. The cooling plate structure for a magnetic levitation bearing controller according to claim 1, characterized in that: The liquid inlet is not directly connected to the longitudinal cooling channel, but is first connected to the transverse cooling channel.

8. The cooling plate structure for a magnetic levitation bearing controller according to claim 1, characterized in that: The longitudinal cooling channels are arranged in the lower left and upper right corners of the cooling plate.

9. The cooling plate structure for a magnetic levitation bearing controller according to claim 1, characterized in that: The cooling plate has bearing controller mounting holes in the upper, middle and lower regions.

10. The cooling plate structure for a magnetic levitation bearing controller according to claim 1, characterized in that: The cooling plate is provided with an airtight interface that connects to the cooling channel. The connection direction of the airtight interface is the same as the installation direction of the bearing controller, which facilitates the connection of subsequent airtight pipelines.

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