Electrode lead-out device for electric machine and electric machine

Abstract

This invention provides an electrode lead-out device and a motor for an electric motor, belonging to the field of motor technology, and addresses the problem of poor sealing in motor wiring devices. The electrode lead-out device for an electric motor includes an electrode rod and a sealing element. The electrode rod includes a first terminal and a second terminal. The sealing element is sleeved on the electrode rod and located between the first and second terminals. When the electrode rod is inserted into the motor housing, the first and second terminals are located on the inner and outer sides of the housing, respectively, allowing the sealing element to provide a sealed connection with the housing. This design enables the motor's electrode lead-out structure to have a reliable static seal, allowing the motor to operate safely under high pressure while maintaining good power output.

Description

Technical Field

[0001] This utility model belongs to the field of motor technology, specifically relating to an electrode lead-out device for a motor and a motor. Background Technology

[0002] As a core component of the closed Brayton cycle helium compressor, it can operate in harsh environments. The high-speed permanent magnet motor is directly connected to the helium compressor in an integrated structure. Due to the high inlet pressure of the helium compressor and the susceptibility of helium working fluid to leakage, high requirements are placed on the sealing performance of each component of the unit. The motor electrode lead-out device is a key component connecting the motor to the external power supply. Existing motor wiring devices have poor sealing performance and cannot effectively prevent leakage. Utility Model Content

[0003] Therefore, the technical problem to be solved by this utility model is to provide an electrode lead-out device for an electric motor and an electric motor for a helium compressor, which can achieve a reliable static seal of the electric motor electrode lead-out structure, ensure the safety of the electric motor in a high-pressure environment, and not affect the power output of the electric motor.

[0004] To address the aforementioned problems, this invention provides an electrode lead-out device for a motor, comprising: an electrode rod and a sealing element. The electrode rod includes a first terminal and a second terminal. The sealing element is sleeved on the electrode rod and located between the first terminal and the second terminal. When the electrode rod is inserted into the motor housing, the first terminal and the second terminal are located on the inner and outer sides of the housing, respectively, allowing the sealing element to achieve a sealed connection with the housing.

[0005] Optionally, the sealing element includes: a conductive end, a sleeve, and a fixed end. The conductive end is sleeved on and fixedly connected to the electrode rod. The sleeve is sleeved on the electrode rod. The inner wall of the sleeve fits against the outer wall of the electrode rod. One end of the sleeve is connected to the conductive end. The fixed end is disposed on the sleeve. The fixed end is provided with external threads. The fixed end is connected to the housing via a threaded seal.

[0006] Optionally, the conducting end and the fixed end are made of Kovar alloy. The sleeve is made of a composite material of ceramic and Kovar alloy.

[0007] Optionally, the conductive end includes a first stepped hole. The first stepped hole extends through the conductive end. The first stepped hole includes a first small-diameter section and a first large-diameter section that are interconnected. The first small-diameter section is sleeved on the electrode rod and is close to the first terminal. A sleeve is inserted into the first large-diameter section.

[0008] Optionally, the sleeve includes a first pipe section and a second pipe section connected to each other. The outer diameter of the first pipe section is larger than the outer diameter of the second pipe section. The end of the first pipe section is inserted into the conductive end.

[0009] Optionally, the fixed end includes a second stepped hole. The second stepped hole penetrates the fixed end. The second stepped hole includes a second large-diameter section and a second small-diameter section that are connected to each other. The fixed end is located at the connection between the first and second pipe sections of the sleeve, with the second large-diameter section fitted onto the first pipe section and the second small-diameter section fitted onto the second pipe section.

[0010] Optionally, the fixed end also includes a retaining flange. The retaining flange is located on the side where the second terminal is located. The retaining flange is used to abut against the outer wall of the housing.

[0011] Optionally, the electrode rod includes a connector. The connector is attached to the end of the electrode rod. The connector is cylindrical. A cross-section is provided on the side wall of the connector. The cross-section is parallel to the axis of the connector. A threaded hole is provided on the cross-section. A first terminal is fixed to the cross-section by engaging a screw with the threaded hole.

[0012] Optionally, the electrode rod includes a first nut and a second nut. A second terminal is sleeved on the electrode rod and located between the first nut and the second nut. The first nut and the second nut clamp and fix the second terminal to the electrode rod.

[0013] This invention also provides a motor for a helium compressor, the motor housing including at least one electrode lead-out hole. Each electrode lead-out hole is provided with the aforementioned electrode lead-out device for the motor.

[0014] Beneficial effects 1. The electrode lead-out device for a motor provided by this utility model includes an electrode rod and a sealing element. The electrode rod includes a first terminal and a second terminal. The sealing element is sleeved on the electrode rod. When the electrode rod passes through the motor housing, the first terminal and the second terminal are located on the inner and outer sides of the housing, respectively, and the sealing element can be sealed to the housing. The electrode lead-out device provided by this utility model enables the electrode lead-out structure of the motor to have a reliable static seal, allowing the motor to operate safely under high pressure, while also ensuring good power output capability.

[0015] 2. The motor for the helium compressor provided by this utility model includes the above-mentioned electrode lead-out device, and therefore has all the above-mentioned beneficial effects, which will not be repeated here. Attached Figure Description

[0016] Figure 1 A three-dimensional structural schematic diagram of an electrode lead-out device for an electric motor according to an embodiment of the present invention; Figure 2 An exploded view of the structure of an electrode lead-out device for an electric motor according to an embodiment of this utility model; Figure 3A schematic diagram of the usage state of an electrode lead-out device for a motor according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of a motor for a helium compressor according to one embodiment of the present invention.

[0017] The reference numerals in the attached figures are as follows: 1. Electrode rod; 2. First terminal; 3. Second terminal; 4. Seal; 5. Connector; 6. Engaging screw; 7. First nut; 8. Second nut; 9. Housing; 10. Electrode lead-out device; 41. Conducting end; 42. Sleeve; 43. Fixed end; 411. First step hole; 421. First pipe section; 422. Second pipe section; 431. Second step hole; 432. Stop; 51. Cut surface; 52. Threaded hole. Detailed Implementation

[0018] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0019] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0020] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0021] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0022] Firstly, this embodiment provides an electrode lead-out device for an electric motor. Figure 1 This is a three-dimensional structural diagram of an electrode lead-out device for an electric motor provided in this embodiment. Figure 2 This is an exploded view of the structure of an electrode lead-out device for an electric motor provided in this embodiment. Figure 3 This is a schematic diagram illustrating the usage state of an electrode lead-out device for a motor provided in this embodiment.

[0023] like Figures 1-3 As shown, the electrode lead-out device 0 for a motor in this embodiment includes an electrode rod 1 and a sealing member 4. The electrode rod 1 includes a first terminal 2 and a second terminal 3. The sealing member 4 is sleeved on the electrode rod 1. The sealing member 4 is located between the first terminal 2 and the second terminal 3. When the electrode rod 1 is inserted into the motor housing 9, the first terminal 2 and the second terminal 3 are located on the inner and outer sides of the housing 9, respectively, and the sealing member 4 can be sealed to the housing 9.

[0024] In some examples, see Figures 1-3 Electrode rod 1 is made of copper. Copper electrodes have good electrical conductivity and are easy to process, allowing for the fabrication of electrodes of various shapes and sizes as needed. Furthermore, copper electrodes can be easily connected to other components via brazing, riveting, or bolting; they also offer good corrosion resistance and are relatively inexpensive, resulting in low cost.

[0025] In some examples, such as Figure 3 As shown, when the electrode rod 1 is inserted into the motor housing 9, the first terminal 2 is located inside the housing 9, and the second terminal 3 is located outside the housing 9. However, it should be noted that in other embodiments, when the electrode rod 1 is inserted into the motor housing 9, the second terminal 3 may also be located inside the housing 9, and the first terminal 2 may be located outside the housing 9. This embodiment does not impose excessive restrictions on this, as long as the installation and usage requirements are met.

[0026] The electrode lead-out device 0 for a motor in this embodiment includes an electrode rod 1 and a sealing member 4. The electrode rod 1 includes a first terminal 2 and a second terminal 3. The sealing member 4 is sleeved on the electrode rod 1. When the electrode rod 1 passes through the motor housing 9, the first terminal 2 and the second terminal 3 are located on the inner and outer sides of the housing 9, respectively, and the sealing member 4 can be sealed to the housing 9. The electrode lead-out device 0 of this embodiment enables the motor's electrode lead-out structure to have a reliable static seal, allowing the motor to operate safely under high pressure while ensuring good power output capability.

[0027] In some embodiments, such as Figures 1-3 As shown, the sealing element 4 includes a conductive end 41, a sleeve 42, and a fixed end 43. The conductive end 41 is sleeved on and fixedly connected to the electrode rod 1. The sleeve 42 is sleeved on the electrode rod 1. The inner wall of the sleeve 42 fits against the outer wall of the electrode rod 1. One end of the sleeve 42 is connected to the conductive end 41. The fixed end 43 is disposed on the sleeve 42. The fixed end 43 is provided with external threads. The fixed end 43 is connected to the housing 9 by a threaded seal.

[0028] In some embodiments, such as Figure 3 As shown, the outer wall of the electrode rod 1 is provided with external threads. The inner wall of the sleeve 42 is provided with internal threads, and the sleeve 42 is sleeved on the electrode rod 1 and connected to the electrode rod 1 through threaded engagement.

[0029] It should be noted that in this embodiment, the conductive end 41, sleeve 42, and fixed end 43 are designed as separate units, which facilitates processing and installation. However, in other embodiments, the conductive end 41, sleeve 42, and fixed end 43 can also be designed as a single-piece structure.

[0030] In this embodiment, the sealing element 4 includes a conductive end 41, a sleeve 42, and a fixed end 43. The conductive end 41 can be welded to the electrode rod 1, thereby making the connection more secure. The sleeve 42 is connected to the conductive end 41, and the fixed end 43 is disposed on the sleeve 42. The fixed end 43 is threaded and tightened to the housing 9, effectively avoiding problems and safety hazards caused by loose connection. In addition, after the fixed end 43 is threaded and tightened to the housing 9, the connection between the fixed end 43 and the housing 9 on the outside of the housing 9 is sealed by argon arc welding, further improving the sealing performance between the two.

[0031] In some embodiments, see Figures 1-3 The conducting end 41 and the fixed end 43 are made of Kovar alloy. The sleeve 42 is made of a composite material of ceramic and Kovar alloy.

[0032] In this embodiment, the conductive end 41 and the fixed end 43 are made of Kovar alloy, which has high strength, corrosion resistance, wear resistance, high temperature resistance, and good processing and welding performance. The sleeve 42 is a composite material of ceramic and Kovar alloy, that is, it is formed by welding Kovar alloy and ceramic parts. The ceramic parts have high hardness and excellent corrosion resistance, while Kovar alloy has good matching performance and is easy to process. The composite component can obtain the excellent properties of both ceramic and metal.

[0033] In some embodiments, such as Figure 3 As shown, the conductive end 41 includes a first stepped hole 411. The first stepped hole 411 penetrates the conductive end 41. The first stepped hole 411 includes a first small-diameter section and a first large-diameter section that are connected to each other. The first small-diameter section is sleeved on the electrode rod 1 and is close to the first terminal 2. The sleeve 42 is inserted into the first large-diameter section.

[0034] In this embodiment, the conductive end 41 includes a first stepped hole 411. The first stepped hole 411 includes a first small-diameter section and a first large-diameter section connected to each other. The inner diameter of the first small-diameter section matches the outer diameter of the electrode rod 1, and the inner diameter of the first large-diameter section matches the outer diameter of the sleeve 42. In this way, the sleeve 42 can be fixed on the electrode rod 1 using the conductive end 41, which facilitates assembly and fixation.

[0035] In some embodiments, such as Figure 2 and 3 As shown, the sleeve 42 includes a first pipe section 421 and a second pipe section 422 that are connected to each other. The outer diameter of the first pipe section 421 is larger than the outer diameter of the second pipe section 422. The end of the first pipe section 421 is inserted into the conductive end 41.

[0036] In this embodiment, the sleeve 42 includes a first pipe section 421 and a second pipe section 422 connected to each other. The outer diameter of the first pipe section 421 is larger than the outer diameter of the second pipe section 422. The outer diameter of the first pipe section 421 is adapted to the mounting hole diameter on the housing 9, and the outer diameter of the second pipe section 422 is smaller than the mounting hole diameter, which can provide sufficient space for the installation of the fixed end 43.

[0037] In some embodiments, such as Figure 3 As shown, the fixed end 43 includes a second stepped hole 431. The second stepped hole 431 penetrates the fixed end 43. The second stepped hole 431 includes a second large-diameter section and a second small-diameter section that are connected to each other. The fixed end 43 is located at the connection between the first pipe section 421 and the second pipe section 422 of the sleeve 42, and the second large-diameter section is fitted onto the first pipe section 421, and the second small-diameter section is fitted onto the second pipe section 422.

[0038] The fixed end 43 in this embodiment includes a second stepped hole 431, which includes a second large-diameter section and a second small-diameter section connected to each other. The inner diameter of the second large-diameter section is adapted to the outer diameter of the first tube 421, and the inner diameter of the second small-diameter section is adapted to the outer diameter of the second tube section 422. With this arrangement, when the fixed end 43 is tightened to the housing 9 by thread positioning, the sleeve 42 can be pressed against the conductive end 41.

[0039] In some embodiments, such as Figure 2 and 3 As shown, the fixed end 43 also includes a retaining edge 432. The retaining edge 432 is located on the side where the second terminal 3 is located. The retaining edge 432 is used to abut against the outer wall of the housing 9.

[0040] The fixed end 43 in this embodiment also includes a retaining edge 432. When the fixed end 43 is tightened to the housing 9 by thread positioning, the retaining edge 432 can press against the outer wall of the housing 9, further playing a good role in fixing and sealing.

[0041] In some embodiments, such as Figures 1-3 As shown, the electrode rod 1 includes a connector 5. The connector 5 is connected to the end of the electrode rod 1. The connector 5 is cylindrical. A cut surface 51 is provided on the side wall of the connector 5. The cut surface 51 is parallel to the axis of the connector 5. A threaded hole 52 is provided on the cut surface 51. The first terminal 2 is fixed to the cut surface 51 by engaging the screw 6 with the threaded hole 52.

[0042] In this embodiment, the first terminal 2 is fixed to the electrode rod 1 by the cooperation of the connector 5 and the engagement screw 6. The side wall of the connector 5 is provided with a cut surface 51, which increases the contact area between the first terminal 2 and the connector 5, which is conducive to ensuring good motor power output.

[0043] In some embodiments, such as Figure 1 and 3 As shown, the electrode rod 1 includes a first nut 7 and a second nut 8. A second terminal 3 is sleeved on the electrode rod 1 and located between the first nut 7 and the second nut 8. The first nut 7 and the second nut 8 clamp and fix the second terminal 3 to the electrode rod 1.

[0044] In this embodiment, the second terminal 3 is clamped and fixed on the electrode rod 1 by the cooperation of the first nut 7 and the second nut 8, which facilitates installation and disassembly, ensuring connection strength and maintaining good motor power output.

[0045] Secondly, this embodiment also provides an electric motor for a helium compressor. Figure 4 This is a schematic diagram of the structure of a motor used in a helium compressor, as provided in this embodiment. Figure 4As shown, the motor housing 9 of this embodiment includes at least one electrode lead-out hole. Each electrode lead-out hole is provided with the aforementioned electrode lead-out device 0 for the motor.

[0046] In this embodiment, the casing of the helium compressor includes three electrode lead-out holes. Each electrode lead-out hole is provided with the aforementioned electrode lead-out device 0 for the motor. The three electrode lead-out devices 0 have the same shape and size, and their structural dimensions are determined according to the motor power. During motor operation, the three electrode lead-out devices 0 draw out three currents, thereby driving the compressor to rotate.

[0047] The motor for the helium compressor in this embodiment includes the electrode lead-out device 0 described above, and therefore possesses all the aforementioned beneficial effects, which will not be repeated here.

[0048] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.

[0049] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model. The above are only preferred embodiments of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. An electrode lead-out device for an electric motor, characterized in that, include: An electrode rod, wherein the electrode rod includes a first terminal and a second terminal; A sealing element is fitted onto the electrode rod; The seal is located between the first terminal and the second terminal; When the electrode rod is inserted into the motor housing, the first terminal and the second terminal are located on the inner and outer sides of the housing, respectively, and the sealing element can be sealed to the housing.

2. The electrode lead-out device for an electric machine according to claim 1, characterized by, The sealing element includes: The conductive end is sleeved on the electrode rod and fixedly connected to the electrode rod; A sleeve is fitted onto the electrode rod; the inner wall of the sleeve is in contact with the outer wall of the electrode rod; one end of the sleeve is connected to the conductive end. A fixed end is provided on the sleeve; the fixed end is provided with an external thread; the fixed end is connected to the housing by a threaded seal.

3. The electrode lead-out device for an electric machine according to claim 2, characterized by, The conductive end and the fixed end are made of Kovar alloy; the sleeve is a composite material of ceramic and Kovar alloy.

4. The electrode lead-out device for an electric motor according to claim 2, characterized by The conductive end includes a first stepped hole; the first stepped hole penetrates the conductive end; the first stepped hole includes a first small diameter section and a first large diameter section connected to each other; the first small diameter section is sleeved on the electrode rod and close to the first terminal; the sleeve is inserted into the first large diameter section.

5. The electrode lead-out device for an electric machine according to claim 2 or 4, characterized by, The sleeve includes a first pipe section and a second pipe section connected to each other; the outer diameter of the first pipe section is larger than the outer diameter of the second pipe section; the end of the first pipe section is inserted into the conductive end.

6. The electrode lead-out device for an electric machine according to claim 5, characterized by The fixed end includes a second stepped hole; the second stepped hole penetrates the fixed end; the second stepped hole includes a second large-diameter section and a second small-diameter section connected to each other; the fixed end is located at the connection between the first pipe section and the second pipe section of the sleeve, and the second large-diameter section is sleeved on the first pipe section, and the second small-diameter section is sleeved on the second pipe section.

7. The electrode lead-out device for an electric motor according to claim 2, characterized by The fixed end also includes a retaining edge; the retaining edge is located on the side near the second terminal; the retaining edge is used to abut against the outer wall of the housing.

8. The electrode lead-out device for an electric motor according to claim 1, characterized by The electrode rod includes: a connector; the connector is connected to the end of the electrode rod; the connector is cylindrical; the side wall of the connector has a cut surface; the cut surface is parallel to the axis of the connector; the cut surface has a threaded hole. The first terminal is fixed on the cut surface by engaging the screw with the threaded hole.

9. The electrode lead-out device for an electric motor according to claim 1, characterized by The electrode rod includes: a first nut and a second nut; The second terminal is sleeved on the electrode rod and located between the first nut and the second nut; The first nut and the second nut clamp and fix the second terminal onto the electrode rod.

10. An electric motor for a helium compressor, characterized by The motor housing includes at least one electrode lead-out hole; each electrode lead-out hole is provided with an electrode lead-out device for the motor as described in any one of claims 1 to 9.

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