Device for detecting sealing performance of output shaft of semi-closed motor

Abstract

The utility model provides a device for detecting the sealing performance of an output shaft of a semi-closed motor, and belongs to the technical field of motor manufacturing. According to the utility model, the air leakage detection tool which is arranged in a cylindrical shape is sleeved outside the output shaft along the direction of the upper cover of the semi-closed motor to be detected and is tightly pressed in a sealing manner, and the air supply pipeline with the one-way check valve is connected to the air leakage detection tool. The detection head of the pressure detector is connected to the pipeline between the one-way check valve and the air leakage detection jig, and the air leakage detection jig is sleeved outside the output shaft from the direction of the upper cover and is not influenced by the internal structure of the to-be-detected semi-closed motor and whether the to-be-detected semi-closed motor is installed into an integral structure. The limitation that an existing detection device can only detect a motor which must be assembled into a complete motor is solved, the problem that the motor needs to be assembled and then disassembled in the detection process is avoided, the machining requirement of the semi-closed motor is better met, the detection process is simple, and the cost is low.

Description

Technical Field

[0001] The utility model relates to the technical field of motor manufacturing, in particular to a device for detecting the sealing performance of an output shaft of a semi-enclosed motor. Background Art

[0002] Due to the influence of the use environment, some motors need to have better sealing performance to ensure that they can be used in harsh environments and appropriately extend their service life. The method commonly used by the industry to improve the sealing performance of motors is to install sealing rings and other structures in the area where there is an assembly gap. For example, an O-ring is set between the output shaft and the upper cover of the motor, and the corresponding assembly gap and other areas are closed by sealing rings and other structures to maintain the relative sealing of the internal environment of the motor, thereby meeting the use requirements.

[0003] At present, the existing motor sealing detection methods on the market usually assemble the motor module into an integral structure before testing, and the detection method is a motor sealing detection method disclosed in patent CN111551316A, which first arranges a water basin filled with water that can cover the motor to be tested, and places the motor to be tested with two ventilated wires in the water with the two wires outside the water surface, then seals the end of one of the wires, and connects the unsealed wire to the output end of the blowing device, blows the unsealed wire through the blowing device, and observes where bubbles appear in the motor in the water, finally takes out the motor, and repairs the point where the bubbles appear in the motor, that is, ventilates the motor through the vent on the motor, and observes whether bubbles are generated in the motor placed in the water. If bubbles are generated, there is a sealing defect at the location where the bubbles are generated. Although the above method can be applied to motor sealing detection, it is aimed at the assembled motor as a whole, while some manufacturers usually only manufacture part of the motor, that is, the produced motor is not installed with modules and other structures, so that the motor is in a semi-closed state, resulting in the existing detection device for the overall motor sealing detection cannot be used in the sealing detection process of the semi-closed motor. However, the manufacturer needs to ensure the sealing performance between the output shaft and the upper cover of the semi-closed motor it produces. If the existing detection device is used for detection, it is necessary to assemble the modules and other structures to form a complete motor before testing, and then remove the modules and other structures after the test is qualified to obtain the semi-closed motor. The manufacturing process is cumbersome and costly. Therefore, it is necessary to design a device that can be used for the sealing detection of the output shaft of the semi-closed motor. Summary of the invention

[0004] In view of the above-mentioned problems existing in the prior art, the present invention aims to provide a device for detecting the sealing of the output shaft of a semi-enclosed motor, so as to set a leakage detection fixture and sleeve it on the outside of the output shaft of the semi-enclosed motor, and the open end of the leakage detection fixture abuts and seals on the upper cover of the semi-enclosed motor, and the other end is connected with the air supply pipeline. At the same time, the air supply pipeline is connected to a pressure detector on the pipeline connected to the leakage detection fixture. The leakage detection fixture is used to detect from the upper cover direction of the output shaft, and there is no need to consider whether the motor is a complete enclosed motor. Single-point detection at the output shaft of the motor is realized, which meets the sealing detection demand of the output shaft of the semi-enclosed motor. In addition, the pressure detector is used to detect the pressure during the pressure holding process, and the detection result is more intuitive and accurate, the detection process is simple, and the cost is low.

[0005] The specific technical solutions are as follows:

[0006] A device for detecting the sealing performance of a semi-enclosed motor output shaft comprises an air supply pipeline for detecting the sealing performance of the semi-enclosed motor output shaft, the air supply pipeline being connected to an air supply device, and having the following characteristics, and further comprising:

[0007] The air leakage detection jig is arranged in a barrel shape, the barrel mouth end of the air leakage detection jig is sleeved outside the output shaft from the upper cover direction, and the barrel mouth of the air leakage detection jig is against the upper cover. At the same time, a sealing ring is provided at one end of the barrel mouth of the air leakage detection jig and is tightly against the upper cover;

[0008] A one-way check valve is arranged on the gas supply pipeline, and one end of the gas supply pipeline away from the gas supply equipment is connected to the gas leakage detection fixture;

[0009] A pressure detector, the detection head of the pressure detector is connected to the air supply pipeline and is located between the one-way check valve and the air leakage detection fixture.

[0010] In the above-mentioned device for detecting the sealing performance of the output shaft of a semi-enclosed motor, the air supply pipeline further includes a pressure regulating valve, which is arranged at the end of the one-way check valve away from the air leakage detection fixture.

[0011] The above-mentioned device for detecting the sealing of the output shaft of a semi-enclosed motor, wherein the air supply pipeline also includes a detection branch pipe, one end of the detection branch pipe is connected to the pipeline between the one-way check valve and the leakage detection fixture, and the pressure detector is installed on the detection branch pipe.

[0012] In the above-mentioned device for detecting the sealing performance of the output shaft of a semi-enclosed motor, the inner wall of the barrel mouth end of the air leakage detection fixture is arranged in a flared manner.

[0013] In the above-mentioned device for detecting the sealing performance of the output shaft of a semi-enclosed motor, the pressure detector includes a display structure, and the display structure outputs an OK or NG signal.

[0014] The above-mentioned device for detecting the sealing of the output shaft of a semi-enclosed motor, wherein a sealing groove is opened on the end face of one end of the barrel mouth of the leakage detection fixture, one side of the sealing ring is embedded in the sealing groove, and the other side of the sealing ring protrudes from the end face of the leakage detection fixture.

[0015] In the above-mentioned device for detecting the sealing performance of the output shaft of a semi-enclosed motor, the air leakage detection fixture is installed on a load device, and the load device performs reciprocating motion along the axial direction of the output shaft of the semi-enclosed motor.

[0016] The positive effects of the above technical solution are:

[0017] The above-mentioned device for detecting the sealing performance of the output shaft of a semi-enclosed motor is provided with a barrel-shaped air leakage detection jig, and the air leakage detection jig is sleeved on the outside of the output shaft of the semi-enclosed motor to be detected along the direction of the upper cover, and a sealing ring is provided at one end of the barrel mouth of the air leakage detection jig and pressed against the upper cover of the semi-enclosed motor to be detected. At the same time, the air leakage detection jig is connected to an air supply pipeline with a one-way check valve, and a pressure detector is connected on the air supply pipeline between the one-way check valve and the air leakage detection jig. A relatively sealed space is formed outside the output shaft from the direction of the upper cover through the air leakage detection jig, and appropriate pressure is provided through the air supply pipeline. After maintaining the pressure, the pressure stabilization is detected by the pressure detector, so as to determine the sealing performance of the relatively sealed space formed outside the output shaft by the air leakage detection jig, so as to determine whether there is a sealing defect at the output shaft of the semi-enclosed motor, thereby meeting the sealing performance detection demand of the output shaft of the semi-enclosed motor, solving the use defect that the existing detection device can only detect the complete motor, and the detection process is simple and the cost is lower. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural diagram of an embodiment of a device for detecting the sealing performance of a semi-enclosed motor output shaft according to the utility model;

[0019] Figure 2 This is a structural diagram of a gas leakage detection fixture according to a preferred embodiment of the utility model.

[0020] In the attached figure: 1. air supply pipeline; 11. detection branch pipe; 2. semi-enclosed motor; 21. output shaft; 22. upper cover; 3. air leakage detection fixture; 31. sealing ring; 32. sealing groove; 4. one-way check valve; 5. pressure detector; 6. pressure regulating valve. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, the following embodiments are combined with the attached Figure 1 To Attachment Figure 2 The technical solution provided by the utility model is described in detail, but the following content is not intended to limit the utility model.

[0022] Figure 1 This is a structural diagram of an embodiment of a device for detecting the sealing performance of a semi-enclosed motor output shaft according to the utility model; Figure 2 This is a structural diagram of a gas leakage detection fixture of a preferred embodiment of the utility model. Figure 1 and Figure 2 As shown, the device for detecting the sealing of the output shaft of the semi-enclosed motor provided in this embodiment includes an air supply pipeline 1, through which the air used in the detection process is provided, and is used to check the sealing of the output shaft 21 of the semi-enclosed motor 2. At this time, the semi-enclosed motor 2 is an incompletely installed motor, such as the module is not installed, so that a sealed inner cavity cannot be formed inside the motor, and the semi-enclosed motor 2 has structures such as an upper cover 22 and an output shaft 21, and structures such as an O-ring are arranged between the upper cover 22 and the output shaft 21 to realize the sealing arrangement at the output shaft 21. In addition, the device for detecting the sealing of the output shaft 21 of the semi-enclosed motor 2 provided in this embodiment also includes: a leakage detection fixture 3, a one-way check valve 4 and a pressure detector 5.

[0023] Specifically, the air leakage detection jig 3 is arranged in a barrel shape, so that the barrel mouth end of the air leakage detection jig 3 is a large opening structure. At this time, the barrel mouth end of the air leakage detection jig 3 is sleeved on the outside of the output shaft 21 from the direction of the upper cover 22, so that the air leakage detection jig can be installed on the outside of the output shaft 21 of the semi-enclosed motor 2 to be detected from the direction of the upper cover 22, and will not be affected by the internal structure of the motor, so it has better adaptability and is more convenient to operate. During installation, the mouth of the air leakage detection jig 3 is pressed against the upper cover 22. At the same time, a sealing ring 31 is provided at one end of the mouth of the air leakage detection jig 3, and when the mouth of the air leakage detection jig 3 is pressed against the upper cover 22, the sealing ring 31 is pressed against the upper cover 22, so that the air leakage detection jig 3 can form a relatively sealed space behind the output shaft 21 to be detected through its own structure and the sealing ring 31 and the upper cover 22. At this time, after the air leakage detection jig 3 is inflated, if the air pressure does not change or the change is within the allowable range, it is determined that the sealing performance at the output shaft 21 meets the use requirements, and the sealing test of the output shaft 21 of the semi-enclosed motor 2 is completed. It is not affected by whether the motor is assembled into a complete structure, has better adaptability, and avoids the need to assemble the motor to be detected into a complete structure before testing, and then dismantle the relevant structure after testing to obtain the semi-enclosed motor 2, which causes the testing process to be cumbersome and costly.

[0024] Specifically, the one-way check valve 4 is arranged on the gas supply pipeline 1, and the one-way check valve 4 is used to control the on and off of the gas supply pipeline 1, and also prevent the backflow of gas. At this time, the end of the gas supply pipeline 1 away from the gas supply device is connected to the gas leakage detection fixture 3, that is, when the gas supply device delivers gas to the gas leakage detection fixture 3 through the gas supply pipeline 1, it will pass through the one-way check valve 4. During the later detection, after the gas leakage detection fixture 3 is inflated, the gas supply pipeline 1 can be closed through the one-way check valve 4, so that the gas in the gas leakage detection fixture 3 will no longer be affected by the gas supply device, which provides a stable environment for the pressure maintenance process of the gas leakage detection fixture 3 and provides conditions for the subsequent pressure stabilization comparison.

[0025] More specifically, the detection head of the pressure detector 5 is connected to the air supply pipeline 1. At this time, after the pressure detector 5 is installed in place, the detection head of the pressure detector 5 is between the one-way check valve 4 and the leakage detection fixture 3, so that after the one-way check valve 4 is closed, the pressure detector 5 can detect the air pressure in the pipeline connected between the one-way check valve 4 and the leakage detection fixture 3. If there is a difference between the air pressure after pressure maintenance and the air pressure at the beginning of pressure maintenance and the difference is greater than the allowable value, it is determined that the sealing of the output shaft 21 of the semi-enclosed motor 2 being tested is unqualified, otherwise it is qualified, thereby realizing the differential pressure method to detect the sealing of the output shaft 21 of the semi-enclosed motor 2, and the detection process is simple and easy to operate, which further reduces the detection cost.

[0026] More specifically, in addition to the one-way check valve 4 mentioned above, the air supply pipeline 1 also includes a pressure regulating valve 6. At this time, the pressure regulating valve 6 is arranged at the end of the one-way check valve 4 away from the leakage detection fixture 3, so that the gas entering the leakage detection fixture 3 through the one-way check valve 4 must first pass through the pressure regulating valve 6, that is, the pressure of the gas entering the leakage detection fixture 3 can be adjusted by the pressure regulating valve 6, so that the pressure of the gas entering the leakage detection fixture 3 meets the detection requirements of the current motor to be tested, avoiding the problem of excessive pressure easily causing the lubricating grease between the O-ring and the output shaft 21 or the upper cover 22 to be blown away, and also avoiding the problem of too low pressure to meet the detection requirements, so that the detection device can flexibly adjust the gas pressure according to the semi-enclosed motor 2 actually being tested, and has better adaptability.

[0027] More specifically, in addition to the one-way check valve 4 and the pressure regulating valve 6 mentioned above, the air supply pipeline 1 also includes a detection branch pipe 11. At this time, one end of the detection branch pipe 11 is connected to the pipeline between the one-way check valve 4 and the leakage detection fixture 3, so that the detection branch pipe 11 is connected to the pipeline between the one-way check valve 4 and the leakage detection fixture 3, so that after closing the one-way check valve 4, the air pressure in the detection branch pipe 11 is consistent with the air pressure in the leakage detection fixture 3, and the pressure detector 5 is installed on the detection branch pipe 11. The detection branch pipe 11 provides an installation carrier for the pressure detector 5, which facilitates the installation of the pressure detector 5. At the same time, it also ensures that the air pressure detected by the pressure detector 5 is the air pressure in the leakage detection fixture 3, so that it can intuitively reflect the sealing performance at the output shaft 21 of the semi-enclosed motor 2 to be detected, and the structural design is more reasonable.

[0028] More specifically, the inner wall of the barrel mouth end of the air leakage detection jig 3 is expanded, that is, the inner wall edge of the barrel mouth end of the air leakage detection jig 3 is chamfered to form an expanded structure at the barrel mouth end of the air leakage detection jig 3, so that the barrel mouth of the air leakage detection jig 3 can be larger, which is convenient for the air leakage detection jig 3 to be quickly and accurately mounted on the output shaft 21 of the semi-enclosed motor 2 to be detected.

[0029] More specifically, the pressure detector 5 includes a display structure, that is, the pressure detector 5 is a structure with a display function. During subsequent testing, if the voltage stabilization test difference is less than or equal to the allowable value, the display structure outputs an OK signal, and if the voltage stabilization test difference is greater than the allowable value, the display structure outputs an NG signal, so that the test personnel can more intuitively obtain the current test results and quickly determine whether the sealing performance of the output shaft 21 of the semi-enclosed motor 2 being tested is qualified, which facilitates the test. It is worth pointing out that the pressure detector 5 with a display structure is an existing product on the market and can be purchased and used directly, so its specific structure is not repeated here.

[0030] More specifically, a sealing groove 32 is further provided on the end surface of one end of the barrel mouth of the air leakage detection fixture 3. At this time, one side of the sealing ring 31 is embedded in the sealing groove 32. At the same time, after one side of the sealing ring 31 is embedded in the sealing groove 32, the other side of the sealing ring 31 protrudes from the end surface of the air leakage detection fixture 3, so that when the sealing ring 31 is installed on the air leakage detection fixture 3, the sealing ring 31 can slightly protrude from the end surface of the air leakage detection fixture 3, so that when the air leakage detection fixture 3 is pressed against the upper cover 22 of the semi-enclosed motor 2 to be detected, the sealing ring 31 can also be pressed against the upper cover 22, ensuring the sealing performance between the air leakage detection fixture 3 and the upper cover 22 of the semi-enclosed motor 2 to be detected, avoiding interference with the sealing detection at the output shaft 21 of the semi-enclosed motor 2, and ensuring the accuracy of the detection structure. In addition, the sealing groove 32 can limit the movement of the sealing ring 31, improve the stability of the installation of the sealing ring 31, thereby further ensuring the accuracy of the detection structure.

[0031] More specifically, the air leakage detection jig 3 is installed on the load device. At this time, the load device is an actuator, and the load device performs axial reciprocating motion along the output shaft 21 of the semi-enclosed motor 2. Preferably, the load device can use a telescopic cylinder, an oil cylinder and an electric cylinder, which can drive the air leakage detection jig 3 to move toward the semi-enclosed motor 2 to be tested and press it on its upper cover 22. At the same time, after the test is completed, the air leakage detection jig 3 can be driven to move away from the semi-enclosed motor 2 to be tested and release the semi-enclosed motor 2 to be tested, which facilitates the unloading of the semi-enclosed motor 2 to be tested and has a more reasonable structural design.

[0032] The device for detecting the sealing property of the output shaft of a semi-enclosed motor provided in the present embodiment comprises an air supply pipeline 1, an air leakage detection fixture 3, a one-way check valve 4 and a pressure detector 5; the air leakage detection fixture 3 is arranged in a cylindrical shape and is sleeved on the outside of the output shaft 21 along the direction of the upper cover 22 of the semi-enclosed motor 2 to be detected and sealed and pressed tightly, and at the same time, the air supply pipeline 1 with the one-way check valve 4 is connected to the air leakage detection fixture 3, and the detection head of the pressure detector 5 is connected to the pipeline between the one-way check valve 4 and the air leakage detection fixture 3, so that the air leakage detection fixture 3 can be provided through the air supply pipeline 1. Supply air pressure and close the one-way check valve 4, and use the pressure detector 5 to detect the air pressure difference before and after maintaining the pressure, and judge the sealing performance of the output shaft 21 of the semi-enclosed motor 2 to be detected according to the steady pressure difference, and the air leakage detection fixture 3 is sleeved on the outside of the output shaft 21 from the upper cover 22, and is not affected by the internal structure of the semi-enclosed motor 2 to be detected and whether it is installed as an integral structure. It solves the limitation that the existing detection device can only detect motors that must be assembled into a complete motor, avoids the problem that the motor needs to be assembled and then disassembled during the detection process, better meets the processing requirements of the semi-enclosed motor 2, and the detection process is simple and the cost is low.

[0033] The above are only preferred embodiments of the present invention, and do not limit the implementation mode and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for detecting the sealing performance of a semi-enclosed motor output shaft, comprising an air supply pipeline for detecting the sealing performance of a semi-enclosed motor output shaft, wherein the air supply pipeline is connected to an air supply device, It is characterized in that Also includes: A gas leakage detection jig, wherein the gas leakage detection jig is arranged in a barrel shape, the barrel mouth end of the gas leakage detection jig is sleeved outside the output shaft from the upper cover direction, and the barrel mouth of the gas leakage detection jig is against the upper cover, and at the same time, a sealing ring is provided at one end of the barrel mouth of the gas leakage detection jig and is tightly against the upper cover; A one-way check valve, wherein the one-way check valve is arranged on the gas supply pipeline, and an end of the gas supply pipeline away from the gas supply device is connected to the gas leakage detection fixture; A pressure detector, wherein the detection head of the pressure detector is connected to the air supply pipeline and is located between the one-way check valve and the air leakage detection fixture.

2. The device for detecting the sealing performance of the output shaft of a semi-enclosed motor according to claim 1, It is characterized in that The air supply pipeline further comprises a pressure regulating valve, and the pressure regulating valve is arranged at an end of the one-way check valve away from the air leakage detection fixture.

3. The device for detecting the sealing performance of the output shaft of a semi-enclosed motor according to claim 1, It is characterized in that The air supply pipeline also includes a detection branch pipe, one end of which is connected to the pipeline between the one-way check valve and the air leakage detection fixture, and the pressure detector is installed on the detection branch pipe.

4. The device for detecting the sealing performance of the output shaft of a semi-enclosed motor according to claim 1, It is characterized in that The inner wall of the barrel mouth end of the air leakage detection fixture is arranged in a flared manner.

5. The device for detecting the sealing performance of the output shaft of a semi-enclosed motor according to claim 1, It is characterized in that The pressure detector includes a display structure, and the display structure outputs an OK or NG signal.

6. The device for detecting the sealing performance of the output shaft of a semi-enclosed motor according to claim 1, It is characterized in that A sealing groove is provided on the end surface of one end of the barrel mouth of the air leakage detection fixture, one side of the sealing ring is embedded in the sealing groove, and the other side of the sealing ring protrudes out of the end surface of the air leakage detection fixture.

7. The device for detecting the sealing performance of the output shaft of a semi-enclosed motor according to claim 1, It is characterized in that The air leakage detection jig is installed on a load device, and the load device performs reciprocating motion along the axial direction of the output shaft of the semi-enclosed motor.

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