Motor air tightness detection device

Abstract

The utility model discloses a motor air tightness detection device which comprises a bottom plate, an air pump and a sealing sleeve are arranged on the bottom plate, a motor is arranged in the sealing sleeve, the top end of the air pump is communicated with an air guide pipe, the top end of the outer wall of the sealing sleeve is fixedly connected with a sealing ring, a sealing film is connected in the sealing ring in a sealing mode, and the sealing film covers the motor. The motor is communicated with the air guide pipe through a sealing mechanism, the sealing mechanism comprises a hollow cylinder covering an air inlet of the motor and a hollow threaded column fixedly connected with the end of the air guide pipe, and the outer wall of the hollow cylinder is in threaded connection with the inner wall of the hollow threaded column. When the device is used for detecting the air tightness of the motor, manual operation is not needed, the operation is simple and convenient, time and labor are saved, the detection efficiency is high, and the accuracy and reliability of a detection result can be ensured; moreover, the design that the hollow cylinder is in threaded connection with the hollow threaded column enables the air guide pipe and the air inlet of the motor to be conveniently assembled and disassembled, and the use convenience of the detection device is improved.

Description

Technical Field

[0001] This utility model relates to the field of motor testing technology, and in particular to a motor airtightness testing device. Background Technology

[0002] As industries increasingly demand higher quality motors, ensuring a good seal between the motor's internal cavity and the external environment has become a critical step in motor manufacturing. If a motor has airtightness defects, external dust, moisture, and corrosive gases can penetrate, damaging the windings and bearings. This can lead to decreased insulation performance, short circuits, increased friction, abnormal heating, and even motor failure. This not only reduces motor efficiency but can also cause safety accidents, increase maintenance costs and downtime, resulting in significant economic losses for the company. Therefore, airtightness testing of motors is necessary to improve quality control in motor production, enhance the company's competitiveness in the market, and provide strong assurance for the stable operation of motors under various complex working conditions.

[0003] Current methods for testing the airtightness of motors mostly involve filling the motor with gas at a certain pressure, cutting off the gas supply after reaching the set pressure, and then continuously monitoring the pressure changes inside the motor using an airtightness detector over a period of time. If the pressure drop exceeds the allowable range, it indicates a leak in the motor; the faster the pressure drops, the greater the leak. However, this testing method requires manual operation, which is cumbersome, complex, time-consuming, and labor-intensive, resulting in low testing efficiency. Furthermore, human error can affect the accuracy and reliability of the test results. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a motor airtightness testing device, which aims to improve the existing technology of motor airtightness testing, which requires manual operation, is cumbersome and complicated, time-consuming and labor-intensive, has low testing efficiency, and suffers from the problem that human error affects the accuracy and reliability of the test results.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An airtightness testing device for an electric motor includes a base plate, on which an air pump and a sealing sleeve are mounted. A motor is housed within the sealing sleeve. An air guide pipe is connected to the top of the air pump. A sealing ring is fixedly connected to the top of the outer wall of the sealing sleeve. A sealing membrane is sealed within the sealing ring and covers the motor. The motor is connected to the air guide pipe via a sealing mechanism. The sealing mechanism includes a hollow cylinder covering the motor's air inlet and a hollow threaded column fixedly connected to the end of the air guide pipe. The outer wall of the hollow cylinder is threadedly connected to the inner wall of the hollow threaded column.

[0007] In one embodiment of this utility model, the sealing film is sleeved on the outer periphery of the hollow cylinder and is sealed to the outer periphery of the hollow cylinder.

[0008] In one embodiment of this utility model, the air inlet of the motor and the hollow cylinder are sealed together by a sealing element.

[0009] In one embodiment of this utility model, a threaded strip is fixedly connected to the outer wall of the hollow cylinder, and an internal thread is provided on the inner wall of the hollow threaded column. The threaded strip is connected to the internal thread of the hollow threaded column.

[0010] In one embodiment of this utility model, fixed columns are fixedly connected to both sides of the outer wall of the hollow threaded column.

[0011] In one embodiment of this utility model, a connecting flange is provided at the top of the air pump, and the air guide pipe is connected to the air pump through the connecting flange.

[0012] In one embodiment of this utility model, a valve is provided on the air guide pipe.

[0013] In one embodiment of this utility model, rubber blocks are fixedly connected to both sides of the front end of the base plate, and the plurality of rubber blocks are arranged symmetrically among them.

[0014] In one embodiment of this utility model, sponge blocks are fixedly connected to both sides of the rear end of the base plate, and the multiple sponge blocks are arranged symmetrically.

[0015] In one embodiment of this utility model, a plurality of support blocks are fixedly connected to the bottom end of the base plate, and the plurality of support blocks are symmetrically distributed among them.

[0016] This utility model has the following beneficial effects:

[0017] This invention provides a motor airtightness testing device that allows the motor to be positioned within a sealed space formed by a sealing sleeve, sealing ring, and sealing membrane. An air pump is connected to an air guide pipe and secured with a connecting flange. The air guide pipe is then connected to the motor's air inlet via a sealing mechanism. The air pump is turned on, and the valve is adjusted, allowing the pumped air to enter the motor's interior along the air guide pipe. If the motor's airtightness is poor, the air entering the motor will leak into the sealed space formed by the sealing sleeve, sealing ring, and sealing membrane. Since the sealing membrane and sealing sleeve are made of flexible materials, they will deform due to airflow. If the motor's airtightness is good, the air entering the motor will not leak into the sealed space formed by the sealing sleeve, sealing ring, and sealing membrane, and the sealing membrane and sealing sleeve will not deform. Therefore, by observing whether the sealing membrane and sealing sleeve deform, the motor's airtightness can be tested, effectively preventing damage to internal components due to poor airtightness. Therefore, this motor airtightness testing device eliminates the need for manual operation when testing the airtightness of motors, making it simple to operate, time-saving, labor-saving, and highly efficient, while ensuring the accuracy and reliability of the test results. Specifically, the inner wall of the sealing ring is sealed to the outer wall of the sealing membrane, the sealing membrane is sealed to the hollow cylinder, and the motor's air inlet is sealed to the hollow cylinder via a sealing element. This creates a sealed environment between the entire sealing sleeve, sealing ring, sealing membrane, and the motor, effectively preventing gas leakage and ensuring the accuracy and reliability of the motor airtightness test results.

[0018] Furthermore, the air duct of this motor airtightness testing device is connected to the motor via a sealing mechanism. The hollow threaded column of the sealing mechanism is fixedly connected to the air duct, the upper part of the hollow cylinder is threadedly connected to the hollow threaded column, and the lower part of the hollow cylinder is sealed to the motor's air inlet via a sealing element. Thus, the sealing mechanism achieves a sealed connection between the air duct and the motor's air inlet, effectively preventing gas leakage and ensuring the sealing performance at the connection. Moreover, the threaded connection between the hollow cylinder and the hollow threaded column facilitates easy installation and disassembly of the air duct and the motor's air inlet, improving the ease of use of the testing device. Attached Figure Description

[0019] Figure 1 This is a perspective view of a motor airtightness testing device proposed in this utility model;

[0020] Figure 2 This is a top view of the air guide tube of an electric motor airtightness testing device proposed in this utility model;

[0021] Figure 3 This is a side view of the motor of the motor for the motor airtightness testing device proposed in this utility model;

[0022] Figure 4This is a top view of the sealing membrane and air pump of the motor airtightness testing device proposed in this utility model;

[0023] Figure 5 This is a schematic diagram showing the unfolded sealing mechanism of a motor airtightness testing device proposed in this utility model.

[0024] Legend:

[0025] 1. Base plate; 2. Sealing mechanism; 201. Hollow threaded column; 202. Fixed column; 203. Threaded strip; 204. Hollow cylinder; 205. Sealing element; 3. Air pump; 4. Air guide pipe; 5. Valve; 6. Sealing ring; 7. Motor; 8. Sealing membrane; 9. Support block; 10. Sealing sleeve; 11. Rubber block; 12. Sponge block; 13. Connecting flange. Detailed Implementation

[0026] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the present utility model will be further described in detail below with reference to specific embodiments. Identical components are indicated by the same reference numerals.

[0027] In this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5This utility model provides a motor airtightness testing device, including a base plate 1, on which an air pump 3 and a sealing sleeve 10 are disposed. A motor 7 is disposed inside the sealing sleeve 10. The top end of the air pump 3 is connected to an air guide pipe 4. A sealing ring 6 is fixedly connected to the top end of the outer wall of the sealing sleeve 10. A sealing membrane 8 is sealed inside the sealing ring 6. The sealing membrane 8 covers the motor 7. The motor 7 is connected to the air guide pipe 4 through a sealing mechanism 2. The sealing mechanism 2 includes a hollow cylinder 204 covering the air inlet of the motor 7 and a hollow threaded column 201 fixedly connected to the end of the air guide pipe 4. The outer wall of the hollow cylinder 204 is threadedly connected to the inner wall of the hollow threaded column 201.

[0030] Furthermore, the sealing membrane 8 is fitted around the outer periphery of the hollow cylinder 204 and is sealed to the outer periphery of the hollow cylinder 204. This sealed connection between the sealing membrane 8 and the hollow cylinder 204 prevents gas leakage from the connection point, ensuring the sealing performance at the connection.

[0031] Furthermore, the air inlet of the motor 7 is sealed to the hollow cylinder 204 via a sealing element 205. This design allows the gas pumped by the air pump 3 to pass through the air guide pipe 4 and the inner wall of the hollow cylinder 204, entering the motor 7 entirely through its air inlet, thus enabling airtightness testing of the motor 7 and ensuring the accuracy and reliability of the airtightness test.

[0032] Furthermore, a threaded bar 203 is fixedly connected to the outer wall of the hollow cylinder 204, and an internal thread is provided on the inner wall of the hollow threaded column 201. The threaded bar 203 is connected to the internal thread of the hollow threaded column 201.

[0033] In this embodiment, the air guide pipe 4 is connected to the motor 7 via the sealing mechanism 2. The hollow threaded post 201 of the sealing mechanism 2 is fixedly connected to the air guide pipe 4. The upper part of the hollow cylinder 204 is threadedly connected to the hollow threaded post 201, and the lower part of the hollow cylinder 204 is sealed to the air inlet of the motor 7. Thus, the sealing mechanism 2 can achieve a sealed connection between the air guide pipe 4 and the air inlet of the motor 7, effectively preventing gas leakage and ensuring the sealing performance of the connection. Furthermore, the threaded connection between the hollow cylinder 204 and the hollow threaded post 201 makes it easy to install and disassemble the air guide pipe 4 and the air inlet of the motor 7, improving the ease of use of the detection device. The inner wall of the sealing ring 6 is sealed to the outer wall of the sealing membrane 8, the sealing membrane 8 is sealed to the hollow cylinder 204, and the air inlet of the motor 7 is sealed to the hollow cylinder 204 through the sealing element 205. This creates a sealed environment between the entire sealing sleeve 10, the sealing ring 6, the sealing membrane 8 and the motor 7, which can effectively prevent gas leakage and ensure the accuracy and reliability of the airtightness test results of the motor 7.

[0034] Furthermore, fixed posts 202 are fixedly connected to both sides of the outer wall of the hollow threaded post 201. The fixed posts 202 drive the hollow threaded post 201 to rotate, so as to achieve a threaded connection between the hollow cylinder 204 and the hollow threaded post 201.

[0035] Furthermore, a connecting flange 13 is provided at the top of the air pump 3, and the air guide pipe 4 is connected to the air pump 3 through the connecting flange 13. The connecting flange 13 ensures the sealing between the air guide pipe 4 and the air pump 3, effectively preventing gas leakage, and also facilitates the quick disassembly and replacement of the air guide pipe 4 to adapt to different working requirements.

[0036] Furthermore, a valve 5 is provided on the air guide pipe 4. The valve 5 on the air guide pipe 4 can effectively achieve flexible control of the airflow.

[0037] Optionally, rubber blocks 11 are fixedly connected to both sides of the front end of the base plate 1, and the rubber blocks 11 are arranged symmetrically among them. The rubber blocks 11 enhance the stability and durability of the equipment.

[0038] Optionally, sponge blocks 12 are fixedly connected to both sides of the rear end of the base plate 1, and the sponge blocks 12 are arranged symmetrically. The base plate 1 can be abutted against the wall or other structure through the sponge blocks 12, which provide additional support for the entire device, play a role in shock absorption, prevent the base plate 1 from directly contacting the wall or other structure, and at the same time protect the base plate 1.

[0039] Optionally, a plurality of support blocks 9 are fixedly connected to the bottom end of the base plate 1, and the plurality of support blocks 9 are symmetrically distributed among each other. The support blocks 9 provide stable support for the entire detection device and ensure uniform force distribution.

[0040] Optionally, the sealing membrane 8 and the sealing sleeve 10 are made of flexible material.

[0041] Working Principle: When performing a sealing test on motor 7, motor 7 is placed in sealing sleeve 10, and the top of sealing sleeve 10 is sealed with sealing ring 6 and sealing membrane 8, thus placing motor 7 in the sealed space formed by sealing sleeve 10, sealing ring 6, and sealing membrane 8. Air pump 3 is connected to air guide pipe 4 and fixed and sealed with connecting flange 13. Air guide pipe 4 is connected to air inlet of motor 7 through sealing mechanism 2. Air pump 3 is turned on, and valve 5 is adjusted. The gas pumped by air pump 3 enters the interior of motor 7 along air guide pipe 4. If the airtightness of motor 7 is poor, the gas entering motor 7 will leak into the sealed space formed by sealing sleeve 10, sealing ring 6, and sealing membrane 8. Since sealing membrane 8 and sealing sleeve 10 are made of flexible material, they will be blown up and deformed. If the airtightness of motor 7 is good, the gas entering motor 7 will not leak into the sealed space formed by sealing sleeve 10, sealing ring 6, and sealing membrane 8, and sealing membrane 8 and sealing sleeve 10 will not deform. Therefore, the airtightness of the motor 7 can be tested by observing whether the sealing membrane 8 and the sealing sleeve 10 are deformed, thus effectively preventing damage to the internal equipment of the motor 7 due to poor airtightness. This motor airtightness testing device eliminates the need for manual operation, is simple to operate, saves time and effort, has high testing efficiency, and ensures the accuracy and reliability of the test results. Specifically, the inner wall of the sealing ring 6 is sealed to the outer wall of the sealing membrane 8, the sealing membrane 8 is sealed to the hollow cylinder 204, and the air inlet of the motor 7 is sealed to the hollow cylinder 204 through a sealing element 205. This creates a sealed environment between the sealing sleeve 10, the sealing ring 6, the sealing membrane 8, and the motor 7, effectively preventing gas leakage and ensuring the accuracy and reliability of the airtightness test results for the motor 7.

[0042] In this device, to allow air to circulate inside the motor 7, the air inlet of the air duct 4 must be completely sealed. Therefore, the air duct 4 of the motor airtightness testing device is connected to the motor 7 via a sealing mechanism 2. The hollow threaded post 201 of the sealing mechanism 2 is fixedly connected to the air duct 4, the upper part of the hollow cylinder 204 is threadedly connected to the hollow threaded post 201, and the lower part of the hollow cylinder 204 is sealed to the air inlet of the motor 7 via a sealing element 205. Thus, the sealing mechanism 2 achieves a sealed connection between the air duct 4 and the air inlet of the motor 7, effectively preventing gas leakage and ensuring the sealing performance at the connection. Furthermore, the threaded connection between the hollow cylinder 204 and the hollow threaded post 201 facilitates installation and disassembly between the air duct 4 and the air inlet of the motor 7, improving the ease of use of the testing device.

[0043] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0044] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model.

[0045] This document uses specific embodiments to illustrate the principles and implementation methods of this utility model. The descriptions of these embodiments are merely for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A device for testing the airtightness of an electric motor, characterized in that: The device includes a base plate (1), on which an air pump (3) and a sealing sleeve (10) are mounted. A motor (7) is mounted inside the sealing sleeve (10). An air guide pipe (4) is connected to the top of the air pump (3). A sealing ring (6) is fixedly connected to the top of the outer wall of the sealing sleeve (10). A sealing membrane (8) is sealed inside the sealing ring (6). The sealing membrane (8) covers the motor (7). The motor (7) is connected to the air guide pipe (4) through a sealing mechanism (2). The sealing mechanism (2) includes a hollow cylinder (204) covering the air inlet of the motor (7) and a hollow threaded column (201) fixedly connected to the end of the air guide pipe (4). The outer wall of the hollow cylinder (204) is threadedly connected to the inner wall of the hollow threaded column (201).

2. The motor airtightness testing device according to claim 1, characterized in that: The sealing membrane (8) is fitted around the outer periphery of the hollow cylinder (204) and is sealed to the outer periphery of the hollow cylinder (204).

3. The motor airtightness testing device according to claim 2, characterized in that: The air inlet of the motor (7) is sealed to the hollow cylinder (204) by a sealing element (205).

4. The motor airtightness testing device according to claim 3, characterized in that: The outer wall of the hollow cylinder (204) is fixedly connected with a threaded strip (203), and the inner wall of the hollow threaded column (201) is provided with an internal thread. The threaded strip (203) is connected to the internal thread of the hollow threaded column (201).

5. The motor airtightness testing device according to claim 4, characterized in that: The hollow threaded column (201) has fixed columns (202) fixedly connected to both sides of its outer wall.

6. The motor airtightness testing device according to claim 1, characterized in that: The top of the air pump (3) is provided with a connecting flange (13), and the air guide pipe (4) is connected to the air pump (3) through the connecting flange (13).

7. The motor airtightness testing device according to claim 1, characterized in that: A valve (5) is provided on the air duct (4).

8. The motor airtightness testing device according to claim 1, characterized in that: Rubber blocks (11) are fixedly connected to both sides of the front end of the base plate (1), and the multiple rubber blocks (11) are arranged symmetrically.

9. The motor airtightness testing device according to claim 1, characterized in that: Both sides of the rear end of the base plate (1) are fixedly connected with sponge blocks (12), and the multiple sponge blocks (12) are arranged symmetrically.

10. The motor airtightness testing device according to claim 1, characterized in that: The bottom end of the base plate (1) is fixedly connected to a plurality of support blocks (9), and the plurality of support blocks (9) are symmetrically distributed among each other.

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