Motor temperature rise test device

Abstract

The utility model discloses a motor temperature rise test device, which relates to the technical field of motor tests and comprises a test bench, one side of the upper end of the test bench is fixedly connected with a safety protection fixing support, one side of the upper end of the test bench is fixedly connected with a three-phase resistor cabinet, and one side of the upper end of the test bench is fixedly connected with a generator. The input end of the generator is fixedly connected with a coupler, the other end of the coupler is fixedly connected with a connecting piece, the other end of the connecting piece is provided with a test motor, one side of the test bench is fixedly connected with a grounding piece and is directly connected with the generator through a three-phase resistor cabinet, and the generator is connected with the test motor through the coupler. The test motor drives the generator to operate at a specified rotating speed, electric energy generated by the test motor is consumed through the three-phase resistor cabinet, and the three-phase resistor cabinet adjusts voltage and current of the motor in actual work, so that temperature rise of the motor in actual work is obtained.

Description

Technical Field

[0001] This utility model relates to the field of electric motor testing technology, specifically an electric motor temperature rise testing device. Background Technology

[0002] An electric motor temperature rise test device is a device used to test the temperature change of an electric motor during operation. By simulating the normal working state of the electric motor, it monitors its temperature rise and thus evaluates the working performance and safety of the electric motor. The electric motor temperature rise test is a mandatory test for electric motors during performance testing. The temperature rise test of an electric motor can be carried out using a three-phase generator adjustable resistance cabinet. It is a method for testing the temperature rise of an electric motor. However, there are no safety protection devices when the electric motor is subjected to the temperature rise test.

[0003] The above-mentioned utility model has the following problems:

[0004] In existing technologies, when conducting temperature rise tests on electric motors in the laboratory, the electric motor and the asynchronous motor are connected by a coupling. Then, two frequency converters are used to control the electric motor and the asynchronous motor. The asynchronous motor is then loaded at a reduced frequency to make the electric motor run at its rated power. Once the operating temperature stabilizes, the temperature rise is calculated. However, this process requires selecting a suitable frequency converter and frequently changing the frequency converter, which is very cumbersome.

[0005] Therefore, those skilled in the art have provided an electric motor temperature rise test device to solve the problems mentioned in the background art. Utility Model Content

[0006] The purpose of this invention is to provide a motor heating test device to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A motor temperature rise test device includes a test bench, a safety protection bracket fixedly connected to one side of the upper end of the test bench, a three-phase resistor cabinet fixedly connected to one side of the upper end of the test bench, a generator fixedly connected to one side of the upper end of the test bench, and a coupling fixedly connected to the input end of the generator.

[0009] As a further embodiment of this utility model: a connecting piece is fixedly connected to the other end of the coupling, a test motor is provided at the other end of the connecting piece, a grounding piece is fixedly connected to one side of the test bench, a fire extinguishing dry powder box is fixedly connected to the upper end of the safety protection fixed bracket, a pressure pump is fixedly connected to one side of the fire extinguishing dry powder box, and a dry powder conveying pipe is fixedly connected to the lower end of the fire extinguishing dry powder box.

[0010] As a further embodiment of this utility model: multiple sets of nozzles are fixedly connected to the lower end of the dry powder conveying pipe, a smoke alarm is fixedly connected to one side of the upper wall of the safety protection fixed bracket, and a lifting protection mechanism is slidably connected to the inner side of the test bench, with an adjustment groove opened near the upper end of the lifting protection mechanism.

[0011] As a further improvement of this utility model: an anti-pinch block is slidably connected to the inner side of the adjustment groove, and multiple sets of adjustment spring rods are fixedly connected to the lower end of the anti-pinch block. The adjustment spring rods are in the spring-extended state by default, and the other end of the adjustment spring rods is fixedly connected to the lifting and protective mechanism.

[0012] As a further improvement of this utility model: the bottom wall of the adjustment groove is fixedly connected to multiple sets of pressing controllers, and the lower end of the anti-pinch block is fixedly connected to protrusions at positions corresponding to the multiple sets of pressing controllers.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This invention uses a three-phase resistance cabinet to adjust the actual power, voltage, and current of the motor during testing, thereby measuring the temperature rise of the motor at its rated power. Regardless of the motor's rated power, as long as the three-phase load cabinet has sufficient power, the motor temperature rise test can be achieved without frequent inverter replacements, greatly reducing the hassle associated with such replacements. A smoke alarm detects the presence of a fire during the experiment and then controls the fire extinguishing dry powder tank, pressurization pump, dry powder delivery pipe, and nozzles to achieve an automatic fire extinguishing system. When a fire occurs during the test, the smoke alarm sounds an alarm, controlling the PLC to start the pressurization pump, pushing the fire extinguishing dry powder through the delivery pipe and spraying it out through the nozzles to extinguish the fire on the test bench. The lifting and protective mechanism is used to raise the platform during a fire to isolate the fire source from the external environment. If a worker is caught in the fire during operation, the anti-pinch block, adjusting spring rod, and pressing controller can sense the worker's arm. If the arm is not removed in time, the anti-pinch block will move downwards, and pressing the controller will trigger the PLC to stop the lifting and protective mechanism from rising, ensuring that the worker is not injured. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a motor heating test device.

[0016] Figure 2 This is a schematic diagram of the internal structure of the test bench in a motor heating test device.

[0017] Figure 3 This is a cross-sectional schematic diagram of the safety protection device in a motor heating test apparatus.

[0018] Figure 4This is a schematic diagram of the anti-pinch mechanism in a motor heating test device.

[0019] In the diagram: 1. Test bench, 2. Safety protection fixed bracket, 3. Three-phase resistor cabinet, 4. Generator, 5. Coupling, 6. Connecting part, 7. Test motor, 8. Grounding part, 9. Fire extinguishing dry powder box, 10. Pressure pump, 11. Dry powder conveying pipe, 12. Nozzle, 13. Smoke alarm, 14. Lifting and protective mechanism, 15. Adjusting groove, 16. Anti-pinch block, 17. Adjusting spring rod, 18. Press controller, 19. Protrusion. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Example 1

[0022] Reference Figure 1 , 2 3. This embodiment provides a motor temperature rise test device, including a test bench 1. A safety protection bracket 2 is fixedly connected to one side of the upper end of the test bench 1. A three-phase resistor cabinet 3 is fixedly connected to one side of the upper end of the test bench 1. A generator 4 is fixedly connected to one side of the upper end of the test bench 1. A coupling 5 is fixedly connected to the input end of the generator 4. A connector 6 is fixedly connected to the other end of the coupling 5. A test motor 7 is installed at the other end of the connector 6. A grounding component 8 is fixedly connected to one side of the test bench 1. The generator is directly connected to the three-phase resistor cabinet, and the generator and the test motor are connected by a grounding component 8. The generator is driven by a test motor at a specified speed. The electrical energy generated by the test motor is consumed by the three-phase resistance cabinet. The three-phase resistance cabinet adjusts the voltage and current of the motor during actual operation to obtain the actual temperature rise of the motor. The three-phase resistance cabinet adjusts the power voltage and current of the motor during the test to measure the temperature rise of the motor when it is operating at rated power. No matter how large the rated power of the motor is, as long as the power of the three-phase load cabinet is large enough, the motor temperature rise test can be achieved. The connecting piece connects the output shaft of the test motor to the coupling.

[0023] Example 2

[0024] Reference Figure 1 , 4This embodiment is based on the previous embodiment, but differs in that: a fire extinguishing dry powder box 9 is fixedly connected to the upper end of the safety protection fixed bracket 2; a pressure pump 10 is fixedly connected to one side of the fire extinguishing dry powder box 9; a dry powder conveying pipe 11 is fixedly connected to the lower end of the fire extinguishing dry powder box 9; multiple sets of nozzles 12 are fixedly connected to the lower end of the dry powder conveying pipe 11; a smoke alarm 13 is fixedly connected to one side of the upper wall of the safety protection fixed bracket 2; a lifting protection mechanism 14 is slidably connected to the inner side of the test bench 1; an adjustment groove 15 is opened near the upper end of the lifting protection mechanism 14; an anti-pinch block 16 is slidably connected to the inner side of the adjustment groove 15; multiple sets of adjusting spring rods 17 are fixedly connected to the lower end of the anti-pinch block 16; the adjusting spring rods 17 are in a spring-extended state by default; the other end of the adjusting spring rods 17 is fixedly connected to the lifting protection mechanism 14; multiple sets of pressing controllers 18 are fixedly connected to the bottom wall of the adjustment groove 15; and the lower end of the anti-pinch block 16 is connected to the multiple sets of pressing controllers 18. 8. Each corresponding position is fixedly connected to a protrusion 19. When a safety accident occurs during the experiment, such as a fire, the smoke alarm detects smoke and controls the PLC (not shown) to pressurize the fire extinguishing dry powder box. The fire extinguishing dry powder passes through the dry powder delivery pipe and is then sprayed out by the nozzle to extinguish the fire on the test bench. At the same time, the lifting and protective mechanism is raised to isolate the internal fire source from the outside. If the worker's arm is not removed in time, the anti-pinch block touches the worker's arm and moves downward in the adjustment groove. The anti-pinch block compresses the adjustment spring rod, and at the same time, the protrusion at the lower end of the anti-pinch block presses against the press controller. The press controller sends a signal back to the PLC, and the PLC controls the lifting and protective mechanism to stop moving. When the worker's arm is removed, the adjustment spring rod drives the anti-pinch block back to its original position, causing the protrusion to release the press controller. The press controller sends a signal back to the PLC, and the PLC controls the lifting and protective mechanism to continue to rise.

[0025] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0026] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An electric motor temperature rise test device comprising a test bench (1), characterized in that, The upper end of the test bench (1) is fixedly connected with a safety protection fixed support (2), the upper end of the test bench (1) is fixedly connected with a three-phase resistance cabinet (3), the upper end of the test bench (1) is fixedly connected with a generator (4), the input end of the generator (4) is fixedly connected with a shaft coupling (5), the other end of the shaft coupling (5) is fixedly connected with a connecting piece (6), the other end of the connecting piece (6) is provided with a test motor (7), one side of the test bench (1) is fixedly connected with a grounding piece (8).

2. The motor temperature rise test apparatus according to claim 1, wherein The upper end of the safety protection fixed support (2) is fixedly connected with a dry powder fire extinguishing box (9), one side of the dry powder fire extinguishing box (9) is fixedly connected with a pressure pump (10), the lower end of the dry powder fire extinguishing box (9) is fixedly connected with a dry powder conveying pipe (11), and the lower end of the dry powder conveying pipe (11) is fixedly connected with a plurality of nozzle groups (12).

3. The motor warm-up test apparatus according to claim 1, wherein The upper wall of the safety protection fixed support (2) is fixedly connected with a smoke alarm (13).

4. The motor warm-up test apparatus according to claim 1, wherein The inner side of the test bench (1) is slidably connected with a lifting protection mechanism (14), and the lifting protection mechanism (14) is provided with an adjusting groove (15) close to the upper end.

5. The motor warm-up test apparatus according to claim 4, wherein The inner side of the adjusting groove (15) is slidably connected with an anti-pinch block (16), and the lower end of the anti-pinch block (16) is fixedly connected with a plurality of adjusting spring rods (17).

6. A motor warm-up test apparatus according to claim 5, wherein The adjusting spring rod (17) is in a default state of elastic extension, and the other end of the adjusting spring rod (17) is fixedly connected to the lifting protection mechanism (14).

7. The motor warm-up test apparatus according to claim 4, wherein The bottom wall of the adjusting groove (15) is fixedly connected with a plurality of pressing controllers (18), and the lower end of the anti-pinch block (16) is fixedly connected with a protruding block (19) at a position corresponding to the plurality of pressing controllers (18).

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