Automatic water replenishing device for high-temperature oil resistance test of oil-cooled electric drive system

Abstract

The utility model discloses an automatic water replenishing device for a high-temperature oil resistance test of an oil cooling electric drive system, which comprises a computer and an automatic water replenishing assembly, the automatic water replenishing assembly is electrically connected with the computer, the automatic water replenishing assembly is communicated with a test tank body, and the computer is used for controlling the automatic water replenishing assembly to carry out real-time water replenishing operation to the test tank body; the automatic water supplementing assembly comprises a water pump, a relay and electromagnetic valves, the computer is in signal connection with the water pump and the relay, a liquid inlet of the water pump is connected with an external water source, a liquid outlet of the water pump is communicated with the testing tank body through a water supply pipeline, and the water supply pipeline is provided with at least one electromagnetic valve. And the electromagnetic valve is electrically connected with the relay. Automatic design is adopted, the flow rate and the flow velocity are specified by computer software, water is continuously supplied under specified conditions, and the detection range is expanded. During operation, manual operation is not needed, personnel are prevented from being injured due to test high temperature, and personnel on-duty for long-time test is omitted.

Description

Technical Field

[0001] This utility model relates to an automatic water replenishment device for high-temperature oil resistance testing of oil-cooled electric drive systems, belonging to the field of insulation system testing technology. Background Technology

[0002] In the oil compatibility test of the oil-cooled electric drive system, there are three key factors: temperature, moisture, and oil. Among them, the test oil and temperature are relatively easy to determine, while moisture is relatively difficult to determine mainly because the actual operating conditions of the motor are more complex, including the saturation of the insulation material absorbing water, the oil seal rotating and drawing in external air, the breather valve drawing in air (exchange) due to high and low temperature changes, and the system seal failure leading to the entry of external water.

[0003] To simulate real-world working environments, the CEEIA 415-2019 standard first mentioned a water content of 5000 ppm in the compatibility test of electric drive insulation materials. This test is conducted in a sealed container. However, the moisture in the sealed container will not completely evaporate, and sealed containers equipped with vent valves cannot guarantee the stability of the moisture content. For example, at a sustained high temperature of 150°C, the moisture in the oil will continuously evaporate and quickly be discharged through the vent valve. Therefore, in non-sealed containers, it is necessary to continuously inject water to maintain a certain moisture content. Thus, there is an urgent need in this field for an automatic water replenishment device for high-temperature oil resistance testing of oil-cooled electric drive systems. Utility Model Content

[0004] The technical problem to be solved by this invention is the lack of automatic water replenishment capability in the prior art under high temperature oil resistance test of oil-cooled electric drive system.

[0005] To solve the above-mentioned technical problems, this utility model provides an automatic water replenishment device for high-temperature oil resistance testing of oil-cooled electric drive systems. It can automatically replenish water during high-temperature oil resistance testing, with a high degree of automation and is convenient and fast.

[0006] To achieve the above-mentioned technical objectives and effects, this application provides the following technical solution:

[0007] An automatic water replenishment device for high-temperature oil resistance testing of an oil-cooled electric drive system includes a computer. The device further includes an automatic water replenishment component, which is electrically connected to the computer and communicates with a test tank. The computer controls the automatic water replenishment component to perform real-time water replenishment operations into the test tank.

[0008] Preferably, the automatic water replenishment component includes a water pump, a relay, and a solenoid valve. The computer is connected to the water pump and the relay respectively. The water pump inlet is connected to an external water source, and the water pump outlet is connected to the test tank through a water supply pipeline. At least one solenoid valve is provided on the water supply pipeline, and the solenoid valve is electrically connected to the relay.

[0009] Furthermore, the number of solenoid valves can be increased or decreased as needed.

[0010] Furthermore, the flow rate and start / stop of the water pump are controlled by the computer.

[0011] Preferably, the test tank is equipped with a vent valve.

[0012] Preferably, the test tank is placed inside an environmental chamber, and the computer is electrically connected to the environmental chamber to regulate the temperature inside the environmental chamber.

[0013] The automatic water replenishment device for high-temperature oil resistance testing of an oil-cooled electric drive system provided by this utility model has the following advantages:

[0014] This utility model discloses an automatic water replenishment device for high-temperature oil resistance testing of an oil-cooled electric drive system. It employs an automated design, with the flow rate and velocity specified by computer software, and operates under specified conditions to achieve continuous water supply to the test tank. No manual operation is required during operation, avoiding injury to personnel due to high temperatures during testing, and also eliminating the need for personnel rotation during long-term testing. Attached Figure Description

[0015] Figure 1 This utility model mainly embodies the overall structural diagram of an automatic water replenishment device for high-temperature oil resistance testing of an oil-cooled electric drive system;

[0016] In the picture:

[0017] 1-Computer; 2-Water pump; 3-Relay; 4-Solenoid valve; 5-Test tank; 6-Ventilation valve; 7-Environmental chamber. Detailed Implementation

[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0019] Reference Figure 1 An automatic water replenishment device for high-temperature oil resistance testing of an oil-cooled electric drive system includes a computer 1 and an automatic water replenishment component. The automatic water replenishment component is connected to the test tank 5 and electrically connected to the computer 1, thereby controlling the automatic water replenishment component to perform real-time water replenishment operation into the test tank 5 through the computer 1.

[0020] The automatic water replenishment component includes a water pump 2, a relay 3, and a solenoid valve 4. The computer 1 is connected to the water pump 2 and the relay 3 respectively. The computer 1 has software pre-set to control the flow rate, start and stop, and running interval of the water pump 2. The running interval of the water pump 2 is calculated based on the pre-measured water evaporation rate. The inlet of the water pump 2 is connected to an external water source, and the outlet of the water pump 2 is connected to the test tank 5 through a water supply pipeline. At least one solenoid valve 4 is installed on the water supply pipeline. During actual testing, the number of solenoid valves 4 is increased or decreased as needed. The solenoid valves 4 are electrically connected to the relay 3. In this embodiment, the control of the water pump 2 and the solenoid valve 4 by the computer 1 is existing technology and will not be described in detail.

[0021] Furthermore, a vent valve 6 is connected to the test tank 5 to facilitate the evaporation of moisture inside the test tank 5. The test tank 5 is placed inside the environmental chamber 7. The computer 1 has preset temperature control software and is electrically connected to the environmental chamber 7 to adjust the temperature inside the environmental chamber 7. The environmental chamber 7 is also equipped with a temperature sensor (not shown in the figure) that is signal-connected to the computer 1. During the test, the temperature inside the environmental chamber 7 is adjusted to a specified range by the computer 1 according to preset conditions, and is monitored in real time by the temperature sensor, thereby ensuring that the high-temperature oil resistance test is always in the optimal temperature state. In this embodiment, the connection and use of the environmental chamber 7 and the temperature sensor are existing technologies and will not be described in detail.

[0022] The working principle of the automatic water replenishment device for high-temperature oil resistance testing of an oil-cooled electric drive system according to this utility model is as follows:

[0023] During testing, the operating conditions, flow rate, and speed are set in the software. The environmental chamber 7 is turned on for testing. When the set conditions are met (such as a certain time interval, the environmental chamber 7 reaching a specified temperature, etc.), the computer 1 controls the solenoid valves 4 to open all or sequentially, and then the water pump 2 is turned on to supply water. After the specified conditions are met, the water supply is stopped, the water pump 2 is turned off, and the system waits for the next condition to be met, and so on in a cycle.

[0024] The above description is merely a preferred embodiment of this utility model and is not intended to limit this utility model in any form or substance. It should be noted that those skilled in the art can make various improvements and additions without departing from this utility model, and these improvements and additions should also be considered within the protection scope of this utility model. Any modifications, alterations, and equivalent changes made by those skilled in the art without departing from the spirit and scope of this utility model using the disclosed technical content are equivalent embodiments of this utility model. Furthermore, any modifications, alterations, and evolutions made to the above embodiments based on the essential technology of this utility model are still within the scope of the technical solution of this utility model.

Claims

1. An automatic water replenishing device for high-temperature oil-resistant testing of an oil-cooled electric drive system, comprising a computer (1), characterized in that, The automatic water supplementing assembly is electrically connected with the computer (1), and is communicated with the test tank body (5); the computer (1) is used for controlling the automatic water supplementing assembly to supplement water into the test tank body (5) in real time. The automatic water supplementing assembly comprises a water pump (2), a relay (3) and a solenoid valve (4); the computer (1) is signal connected with the water pump (2) and the relay (3) respectively; the water inlet of the water pump (2) is connected with an external water source; the water outlet of the water pump (2) is communicated with the test tank body (5) through a water supply pipeline; at least one solenoid valve (4) is arranged on the water supply pipeline; the solenoid valve (4) is electrically connected with the relay (3). The flow rate and opening and closing of the water pump (2) are controlled by the computer (1).

2. The automatic water replenishing device for high temperature oil resistance test of oil-cooled electric drive system according to claim 1, characterized in that, The number of the solenoid valves (4) can be increased or decreased according to requirements.

3. The automatic water replenishing device for high temperature oil resistance test of oil-cooled electric drive system according to claim 1, characterized in that, The test tank body (5) is connected with a breather valve (6).

4. The automatic water replenishing device for high temperature oil resistance test of oil-cooled electric drive system according to claim 1, characterized in that, The test tank body (5) is arranged in an environmental box (7); the computer (1) is electrically connected with the environmental box (7) to adjust the temperature in the environmental box (7).

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