Motor service life testing device

Abstract

The utility model relates to a motor testing device, in particular to a motor service life testing device, and solves the technical problems that the existing motor service life testing device is tedious in testing process and relatively high in cost. According to the motor service life testing device provided by the utility model, the connecting main body is connected with the output shaft of the motor to be tested, the rotating arm is used as a force arm, the wind resistance is adjusted by adjusting the angle of the fan blade installed at the outer end of the rotating arm, or the load torque of the motor to be tested is adjusted by adjusting the length of the rotating arm extending out of the testing main body installation disc. The device can realize long-time operation of the to-be-tested motor in a rated torque state, is low in cost, is convenient to adjust, is high in applicability, and can realize life verification of motors of different specifications.

Description

Technical Field

[0001] This utility model relates to motor testing devices, specifically to a motor life testing device. Background Technology

[0002] To understand the durability of a motor under rated load conditions and ensure that the motor can work stably within the expected service life, it is necessary to test the life of the motor under rated operating conditions. Traditional life testing methods include the magnetic load method and the drag method.

[0003] The magnetic load method utilizes the electromagnetic brake 03 for life testing, such as... Figure 1 As shown, the output end of the motor under test 01 is connected to the electromagnetic brake 03 through the coupling 02. The load torque of the electromagnetic brake 03 is adjusted to the rated torque of the motor under test 01. Then, the motor under test 01 is powered on to start the test. Whether the current or speed of the motor under test 01 meets the technical requirements is used as the standard for judging the motor life.

[0004] The life test of the towing method is carried out using the towing motor 04, such as... Figure 2 As shown, the output terminal of the motor under test 01 is connected to the auxiliary motor 04 through the coupling 02. The auxiliary motor 04 is connected in series with the adjustable resistor 05 as a load. When the motor under test 01 is energized and rotates, the motor under test 01 drives the auxiliary motor 04 to rotate. At this time, the auxiliary motor 04 acts as a generator. Then, the value of the adjustable resistor is adjusted. When the ammeter displays the rated current of the motor under test 01, it is considered that the motor under test 01 has reached the rated working state. Whether the current or speed of the motor under test 01 meets the technical requirements is used as the standard for judging the motor life.

[0005] Both the magnetic load method and the drag method test the life of the motor under test (01) under rated working conditions by applying a fixed load torque to the motor under test (01). However, the testing procedures of these two methods are cumbersome and require the purchase of specialized equipment. When verifying the life of multiple motors under test (01), each motor under test (01) needs to be equipped with a set of testing devices, resulting in high testing costs and time-consuming and labor-intensive adjustments. These methods cannot meet the needs of batch testing. Utility Model Content

[0006] The purpose of this invention is to solve the technical problems of cumbersome testing process and high cost of existing motor life testing devices, and to provide a motor life testing device.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A motor life testing device, characterized in that it includes a test fixture for providing load torque to the motor under test;

[0009] The test tool comprises a connecting body, two rotating arms and two wind blades;

[0010] The connecting body comprises a connecting end and a mounting disc arranged outside the connecting end, the connecting end is used for connecting the output shaft of the motor to be tested, and the mounting disc is coaxially arranged with the connecting end;

[0011] The two rotating arms are the same in structure and size and are installed on the mounting disc in the radial direction, and one wind blade is installed at the outer end of each rotating arm;

[0012] The wind blade comprises a fixed end and a wind blade end which are connected with each other, the fixed end is rotatably installed at the outer end of the rotating arm, and the wind resistance of the wind blade can be adjusted by rotating the fixed end.

[0013] Further, a waist-shaped hole is arranged on each rotating arm, the rotating arm is installed on the mounting disc in the radial direction through the waist-shaped hole by means of a screw, and the length of the rotating arm extending out of the mounting disc can be adjusted by adjusting the position of the screw in the waist-shaped hole.

[0014] Further, a guide groove is arranged on the outer wall of the mounting disc in the radial direction, the width of the guide groove is matched with the width of the rotating arm, and the two rotating arms are installed in the guide groove.

[0015] Further, an installation hole is arranged at the outer end of the rotating arm, the fixed end of the wind blade is rotatably installed in the installation hole, a positioning screw is arranged on the rotating arm outside the installation hole, the fixed end of the wind blade can be loosened or locked through the positioning screw, so that the angle of the wind blade is adjusted, and then the wind resistance of the wind blade is adjusted.

[0016] Further, a direct-current power supply and an ammeter are further included;

[0017] The direct-current power supply, the ammeter and the motor to be tested are connected in series, the direct-current power supply is used for supplying power to the motor to be tested, and the ammeter is used for measuring the current when the motor to be tested is powered.

[0018] Compared with the prior art, the utility model has the beneficial effects that:

[0019] 1、 the utility model discloses a motor life test device, utilize test body and the motor to be tested output shaft connection, install the rotating arm as the force arm on test body, the size of the wind resistance is adjusted through the angle of the wind blade installed at the outer end of the rotating arm, and then the load torque of the motor to be tested is adjusted, the long -time operation of the motor to be tested under the rated torque state can be realized, and the utility model has the advantages of low cost, convenient adjustment and strong applicability.

[0020] 2. The motor life testing device provided by the utility model has the advantages that the waist-shaped holes are arranged on the two rotating arms, the length of the rotating arms extending out of the mounting disc can be adjusted through the position of the adjusting screw in the waist-shaped hole, the length of the force arm is adjusted, and the load torque of the motor to be tested is adjusted. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a schematic diagram of the motor life testing device of the prior art magnetic load method;

[0022] Figure 2 It is a schematic diagram of the motor life testing device of the prior art magnetic load method;

[0023] Figure 3 It is a schematic diagram of the motor life testing device of the prior art magnetic load method;

[0024] Figure 4 It is a sectional view of Figure 3 It is a sectional view of

[0025] Figure 5 It is a sectional view of Figure 3 It is a sectional view of

[0026] Figure 6 It is a schematic diagram of the motor life testing device of the prior art magnetic load method;

[0027] The following signs are explained as follows:

[0028] 01 - motor to be tested, 02 - shaft coupling, 03 - electromagnetic brake, 04 - counter-towed motor, 05 - adjustable resistor;

[0029] 1 - connecting body, 2 - rotating arm, 3 - fan blade, 4 - waist-shaped hole, 5 - testing tool, 6 - guide groove, 7 - screw, 8 - positioning screw. DETAILED DESCRIPTION

[0030] In order to make the purpose, advantages and characteristics of the utility model clearer, the utility model provides a motor life testing device is further described in detail in combination with the drawings and specific embodiments.

[0031] A motor life testing device comprises a testing tool 5 for providing a load torque for a motor to be tested 01, a direct-current power supply and an ammeter. As shown in Figures 3-5As shown, the test tool 5 includes a connecting body 1, two rotating arms 2 and two wind blades 3. The connecting body 1 includes a connecting end for connecting the output shaft of the motor 01 to be tested and a mounting disc arranged outside the connecting end coaxially with the connecting end. The outer wall of the mounting disc is provided with a guide groove 6 in the radial direction, the width of the guide groove 6 is matched with the width of the rotating arm 2, and the two rotating arms 2 are installed in the guide groove 6. The two rotating arms 2 are the same in structure and size, and each of them is provided with a waist-shaped hole 4. The rotating arm 2 is installed on the mounting disc in the radial direction through the waist-shaped hole 4 by means of the screw 7. By adjusting the position of the screw 7 in the waist-shaped hole 4, the length of the rotating arm 2 extending out of the mounting disc can be adjusted, and thus the length of the lever arm can be adjusted, and the load torque of the motor 01 to be tested can be adjusted. The wind blade 3 includes a fixed end and a wind blade end connected with each other. The outer end of the rotating arm 2 is provided with a mounting hole, and the fixed end of the wind blade 3 is rotatably installed in the mounting hole. A positioning screw 8 is installed on the rotating arm 2 outside the mounting hole, and the fixed end of the wind blade 3 can be loosened or locked by means of the positioning screw 8, so as to adjust the angle of the wind blade 3, and thus adjust the wind resistance of the wind blade 3. As shown in the figure, Figure 6 As shown, the DC power supply, the ammeter and the motor 01 to be tested are connected in series. The DC power supply is used to power the motor 01 to be tested, and the ammeter is used to measure the current when the motor 01 to be tested is powered.

[0032] The measurement principle of the embodiment is as follows:

[0033] The torque M of the motor 01 to be tested is FL, F is the wind resistance, and L is the length of the lever arm. Therefore, the torque of the motor 01 to be tested can be changed by changing the length of the lever arm and / or the size of the wind resistance. In this embodiment, the length of the rotating arm 2 extending out of the mounting disc is adjusted by means of the waist-shaped hole 4 to change the length of the lever arm, and the size of the wind resistance can be adjusted by rotating the fixed end of the wind blade 3, and thus the torque of the motor 01 to be tested is adjusted, so that the motor 01 to be tested works in the rated state.

[0034] The working process of the embodiment is as follows: the motor 01 to be tested and the test tool 5 are fixed by screws, the motor 01 to be tested is powered and rotated, and the value of the ammeter is observed. When the current is not equal to the current under the rated torque of the motor 01 to be tested, the length of the rotating arm 2 extending out of the mounting disc is adjusted, and / or the fixed end of the wind blade 3 is rotated, so that the value of the ammeter is equal to the current size of the motor 01 to be tested under the rated torque. At this time, it is determined that the working state of the motor 01 to be tested is the rated working state.

[0035] In this way, the motor to be tested 01 can run for a long time under rated load, so as to measure the service life of the motor to be tested 01 under rated torque. When multiple motors to be tested 01 need to be verified for service life under rated torque, multiple such test bodies only need to be processed to meet the requirements, the manufacturing cost is low, the adjustment is convenient, different sizes of test tools 5 can be designed for different motors to meet the service life verification requirements of different types of motors.

[0036] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the present application.

Claims

1. An electric machine life testing apparatus, characterized by: It comprises a test tool (5) for providing load torque for the motor (01) to be tested; The test tool (5) comprises a connecting body (1), two rotating arms (2) and two fan blades (3); The connecting body (1) comprises a connecting end and a mounting disc arranged outside the connecting end, the connecting end is used for connecting the output shaft of the motor (01) to be tested, and the mounting disc is coaxially arranged with the connecting end; The two rotating arms (2) are the same in structure and size, and are installed on the mounting disc in the radial direction, and an outer end of each rotating arm (2) is provided with a fan blade (3); The fan blade (3) comprises a fixed end and a fan blade end connected with each other, the fixed end is rotatably installed on the outer end of the rotating arm (2), and the wind resistance of the fan blade (3) can be adjusted by rotating the fixed end.

2. The motor life test device according to claim 1, wherein: Each rotating arm (2) is provided with a waist-shaped hole (4), the rotating arm (2) is installed on the mounting disc in the radial direction through the waist-shaped hole (4) by a screw (7), and the length of the rotating arm (2) extending out of the mounting disc can be adjusted by adjusting the position of the screw (7) in the waist-shaped hole (4).

3. The motor life test device according to claim 2, wherein: An outer side wall of the mounting disc is provided with a guide groove (6) in the radial direction, the width of the guide groove (6) is matched with the width of the rotating arm (2), and the two rotating arms (2) are installed in the guide groove (6).

4. The motor life test device according to any one of claims 1-3, wherein: An outer end of the rotating arm (2) is provided with a mounting hole, the fixed end of the fan blade (3) is rotatably installed in the mounting hole, a positioning screw (8) is installed on the rotating arm (2) outside the mounting hole, the fixed end of the fan blade (3) can be loosened or locked through the positioning screw (8), so as to adjust the angle of the fan blade (3) and further adjust the wind resistance of the fan blade (3).

5. A motor life testing apparatus as claimed in claim 4, wherein: It further comprises a direct current power supply and an ammeter; The direct current power supply, the ammeter and the motor (01) to be tested are connected in series, the direct current power supply is used for supplying power for the motor (01) to be tested, and the ammeter is used for measuring the current when the motor (01) to be tested is powered on.

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