Multi-loop cooling liquid temperature and flow regulation and control device for motor testing

Abstract

The utility model discloses a multi-loop cooling liquid temperature and flow regulation and control device for motor testing, which belongs to the technical field of motor performance research and development and comprises a control cabinet, a water tank is fixedly mounted at the top end of the control cabinet, and a plate heat exchanger and a water pump are respectively and fixedly mounted at the bottom end of the control cabinet. The control cabinet is provided with a conveying assembly capable of conveying high-temperature water in the water tank and accurately controlling the temperature of the motor and the driver, and a backflow assembly capable of enabling hot water obtained after the motor and the driver are cooled to flow back into the water tank. Through the structural arrangement of the two drainage pipes, the shunt pipe and the three return pipes, three independent circulating cooling loops are formed, each channel is provided with a flow sensor and a flow proportional valve, flow parameters can be independently set and adjusted, the adjusting precision reaches + / -0.1 L / min, the three channels do not interfere with each other, and the testing efficiency and the system flexibility are remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of motor performance research and development technology, and in particular to a multi-loop coolant temperature and flow rate control device for motor testing. Background Technology

[0002] In the field of motor performance research and development, in order to accurately evaluate the working characteristics of motors and drives (motor controllers) under different temperature environments, a special coolant constant temperature system needs to be configured. Existing technologies usually adopt a single-loop or simple circulating water cooling method, which delivers cooling water to the external heat dissipation structure of the motor through a water pump, or adopts a heat dissipation scheme that combines air cooling and simple water cooling. Such systems are generally equipped with basic heating devices to raise the water temperature, and the flow rate is manually adjusted by valves. Some improved systems use a single heat exchanger for coarse temperature adjustment.

[0003] Existing coolant temperature control systems are mostly single-loop designs, which cannot simultaneously perform independent temperature and flow tests on multiple motors or drives, resulting in low testing efficiency. Utility Model Content

[0004] The purpose of this invention is to solve the problem that existing coolant constant temperature systems cannot simultaneously perform independent temperature and flow tests on multiple motors or drives, and to propose a multi-loop coolant temperature and flow control device for motor testing.

[0005] To achieve the above objectives, the present invention employs the following technology: a multi-loop coolant temperature and flow rate control device for motor testing, comprising a control cabinet, a water tank fixedly installed at the top of the control cabinet, a plate heat exchanger and a water pump respectively fixedly installed at the bottom of the control cabinet, the control cabinet being equipped with a conveying component capable of conveying high-temperature water from the water tank to precisely control the temperature of the motor and the driver, and a return component capable of allowing the hot water after cooling the motor and the driver to flow back into the water tank.

[0006] As a further description of the above technical solution: the conveying assembly includes an inlet pipe connected between the water tank and the water pump inlet, an outlet pipe connected to the water pump outlet, and several interfaces provided on both sides of the plate heat exchanger, one end of each interface being connected to the first drain pipe.

[0007] As a further description of the above technical solution: several interfaces are respectively connected to the inlet and outlet at the bottom of the plate heat exchanger, and the other end of several interfaces is connected to the water outlet pipe. The water tank is equipped with an electric heater and a stainless steel liquid level switch.

[0008] As a further description of the above technical solution: the water tank is also equipped with a level gauge and a sensor, and an overflow pipe is connected to the water tank.

[0009] As a further description of the above technical solution: the control cabinet is equipped with three sets of three-way valves, and the branch pipes are connected to the water outlet pipe. One end of the branch pipe is connected to the water inlet of the three sets of three-way valves through three branches. One end of the three sets of three-way valves is connected to the inlet at the top of the plate heat exchanger.

[0010] As a further description of the above technical solution: the outlet at the top of the plate heat exchanger is connected to the second drain pipe, and the other ends of the three sets of three-way valves are respectively connected to the diversion pipes.

[0011] As a further description of the above technical solution: the reflux assembly includes three reflux pipes connected and installed on the water tank, and each reflux pipe is respectively equipped with a flow proportional valve and a flow sensor.

[0012] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0013] The structure of two drain pipes, a branch pipe and three return pipes forms three independent circulating cooling loops. Each loop is equipped with a flow sensor and a flow proportional valve, and the flow parameters can be set and adjusted independently with an adjustment accuracy of ±0.1L / min. The three loops do not interfere with each other, which significantly improves the testing efficiency and system flexibility.

[0014] Cooling water circulates between the delivery components, the object being cooled, and the return components. It then returns to the water tank via the return pipe for re-temperature adjustment and reuse, reducing water waste. The water tank is equipped with a stainless steel level switch, level gauge, and overflow pipe, forming a multi-stage water level safety protection system. When the water level is low, the water pump and electric heater are automatically shut off to prevent idling and dry burning. When the water level is high, the overflow pipe passively releases water to prevent overpressure damage to the water tank, ensuring the safe and stable operation of the system.

[0015] With precise and independent control of temperature and flow rate, it can simulate the actual working state of motors and drives under different ambient temperatures. It can provide water for "simulated high temperature environment" or "active heating test", and can also provide low temperature cooling through plate heat exchanger. With the flexible combination of three independent circuits, it can meet the diverse testing needs in motor performance research and development. Attached Figure Description

[0016] Figure 1 An overall schematic diagram according to an embodiment of the present utility model is shown;

[0017] Figure 2 The present invention provides an embodiment of the present invention. Figure 1 Another perspective view;

[0018] Figure 3 The present invention provides an embodiment of the present invention. Figure 1 The front view;

[0019] Figure 4 The present invention provides an embodiment of the present invention. Figure 3 Rear view;

[0020] Figure 5 An internal structural diagram of the control cabinet provided according to an embodiment of the present utility model is shown;

[0021] Figure 6 The present invention provides an embodiment of the present invention. Figure 5 Another perspective view.

[0022] Legend:

[0023] 10. Control cabinet; 11. Water tank; 12. Plate heat exchanger; 13. Water pump; 14. Conveying assembly; 141. Inlet pipe; 142. Outlet pipe; 143. Interface; 144. First drain pipe; 145. Three-way valve; 146. Branch pipe; 147. Second drain pipe; 148. Diverter pipe; 15. Return assembly; 151. Return pipe; 152. Flow proportional valve; 153. Flow sensor. Detailed Implementation

[0024] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0025] Reference Figures 1 to 6 This embodiment provides a multi-loop coolant temperature and flow rate control device for motor testing, including a control cabinet 10. A water tank 11 is fixedly installed on the top of the control cabinet 10. The water tank 11 stores high-temperature water. A plate heat exchanger 12 and a water pump 13 are respectively fixedly installed at the bottom of the control cabinet 10. The control cabinet 10 is equipped with a conveying component 14 that can convey the high-temperature water in the water tank 11 to accurately control the temperature of the motor and the drive, and a return component 15 that can allow the hot water after cooling the motor and the drive to flow back into the water tank 11.

[0026] Reference Figures 2 to 6Specifically, in order to test the motor and the driver, a conveying assembly 14 is set up. The conveying assembly 14 includes an inlet pipe 141 that connects the water tank 11 and the water pump 13 inlet. By starting the water pump 13, a negative pressure is generated at the water pump 13 inlet, which allows the inlet pipe 141 to draw out the high-temperature water in the water tank 11. The outlet pipe 142 is connected to the water pump 13 outlet, and a positive pressure is generated at the water pump 13 outlet, which allows the drawn-in high-temperature water to enter the outlet pipe 142 through the outlet. The outlet pipe 142 forms a channel 1, which is a hot water channel. Several interfaces 143 are provided on both sides of the plate heat exchanger 12, and one end of the interfaces 143 is connected to the first drain pipe 144.

[0027] In more detail, several interfaces 143 are respectively connected to the inlet and outlet at the bottom of the plate heat exchanger 12, and the other end of several interfaces 143 is connected to the outlet pipe 142. The high-temperature water entering the outlet pipe 142 will be transported to the interface 143, and then through the inlet and outlet at the bottom of the plate heat exchanger 12, the high-temperature water can enter the first drain pipe 144. Then, through the first drain pipe 144, the high-temperature water can be used to "simulate a high-temperature environment" or "actively heat the test" for the motor and the drive. The temperature can be set in the range of room temperature to 95°C, with a control accuracy of ±0.5°C, thereby realizing precise control of the operating temperature of the motor and the drive. The water tank 11 is equipped with an electric heater (which can heat the water in the water tank 11 from room temperature to the target temperature to provide heat energy for the water) and a stainless steel liquid level switch (the liquid level switch is used to detect the water level in the water tank 11 in real time to prevent the water level from being too low due to evaporation, leakage or discharge).

[0028] In more detail, the water tank 11 is also equipped with a level gauge (the level gauge is used to intuitively display the real-time water level in the water tank 11, so that the operator can directly observe the water storage status and provide a visual basis for water replenishment and drainage operations) and a sensor (the sensor is a PT100 sensor, which is a platinum resistance temperature sensor. It utilizes the characteristic that the resistance of platinum resistance changes with temperature (the resistance is 100Ω at 0℃) to achieve high-precision temperature detection). An overflow pipe is inserted into the water tank 11 (when the water level in the water tank 11 exceeds the design upper limit, the excess water will be discharged from the overflow pipe to prevent the internal pressure of the water tank 11 from accumulating and causing structural damage).

[0029] In more detail, the control cabinet 10 is equipped with three sets of three-way valves 145, and branch pipes 146 are connected to the outlet pipe 142. When high-temperature water is transported through the outlet pipe 142, it also enters the branch pipe 146, forming channel 2. One end of the branch pipe 146 is connected to the inlet of the three sets of three-way valves 145 through three branches, so that the high-temperature water entering the branch pipe 146 can enter the three sets of three-way valves 145 sequentially through the three branches. Then, through the other two outlets of the three sets of three-way valves 145, three flow channels are formed with the outlet pipe 142. One end of the three-way valve 145 is connected to the inlet at the top of the plate heat exchanger 12. The high-temperature water enters the plate heat exchanger 12 through the inlet at the top of the plate heat exchanger 12 after passing through the outlet of one end of the three three-way valves 145. Then, through the in-wall heat exchange principle of the plate heat exchanger 12, the system circulating water (hot water) and the external cooling medium (cold water) flow in opposite directions on both sides of the metal plates. Heat is transferred through the conduction of the plates, the water temperature on the system side decreases, and the temperature of the medium on the cold side increases, thereby converting the high-temperature water into cold water and delivering it from the top outlet to the second drain pipe 147.

[0030] In more detail, the outlet at the top of the plate heat exchanger 12 is connected to the second drain pipe 147. The three cooled waters flow into the second drain pipe 147 to form a single main pipe output. The other ends of the three sets of three-way valves 145 are connected to the branch pipes 148 respectively, so that the high-temperature water can enter the corresponding branch pipe 148 from the other outlet of the three-way valve 145, and transport the high-temperature water, thereby changing the transport position of the high-temperature water.

[0031] Reference Figure 5 Specifically, in order to allow water to flow back into the water tank 11, a return flow assembly 15 is set up. The return flow assembly 15 includes three return pipes 151 connected to the water tank 11. The three return pipes 151 allow the hot water after cooling the motor and driver to flow back, forming a circulation. At the same time, a flow meter installed on the return pipe 151 monitors the actual flow rate. Each return pipe 151 is equipped with a flow proportional valve 152 (the flow rate is automatically and intelligently adjusted by the proportional valve. According to the test requirements and the required flow rate value is set, the system will automatically adjust the flow rate to the set value) and a flow sensor 153 (provides the actual flow rate data of each loop in real time, and generates an adjustment command after comparing it with the set value).

[0032] When cooling the motor and driver, the water in the water tank 11 is first heated to the required temperature by the electric heater. Then, the water pump 13 is started. The water pump 13 draws the high-temperature water in the water tank 11 through the inlet pipe 141 and delivers it to the interface 143 at the inlet of the plate heat exchanger 12 through the outlet pipe 142. Then, it enters the first drain pipe 144 through the bottom outlet of the plate heat exchanger 12 and the corresponding interface 143. The first drain pipe 144 is used to transport the heated high-temperature water. Then, the high-temperature water is delivered to the motor and driver for heating through the second drain pipe 147. The heated hot water flows back to the water tank 11 through the corresponding return pipe 151 to form a cycle. Then, according to the test requirements, the opening and closing status of the three sets of three-way valves 145 can be controlled.

[0033] When the three sets of three-way valves 145 are opened, the high-temperature water in the outlet pipe 142 will enter the three-way valve 145 through the branch pipe 146 during transportation. Then, the high-temperature water enters the plate heat exchanger 12 through the three-way valve 145 and exchanges heat with the external cooling medium. The cooled water flows out from the outlet at the top of the plate heat exchanger 12 and can be transported through the second drain pipe 147 to the motor and driver for cooling.

[0034] The cooled hot water flows back to the water tank 11 through the corresponding return pipe 151, forming a cycle. During the return process, the flow ratio valve 152 automatically adjusts the flow according to the test requirements to ensure the flow of each loop is stable. The flow sensor 153 monitors the actual flow in real time and feeds the data back to the control system for timely adjustment. Through this series of operations, the device can achieve precise control of the operating temperature of the motor and the driver to meet different test requirements.

[0035] After testing, the residual liquid inside the product can be quickly drained through the bypass vent valve. The system can also be set with different cooling water flow rates. The flow rate is adjusted by the flow proportional valve 152 on the return pipe 151 with an accuracy of ±0.1L / min. The stable and controllable flow rate meets the testing requirements of various working conditions. The PID intelligent controller displays the flow set value and the measured value, the intelligent digital pressure gauge displays the inlet pressure value, and the intelligent digital temperature gauge displays the water temperature value. When the system is running, the operating status of the internal equipment is displayed on the panel, making the entire operation clear at a glance and easy to monitor. When a fault occurs in a certain part, its alarm indicator light illuminates and an audible alarm is sounded, so that the operator can quickly find the faulty part and quickly troubleshoot and restore production.

[0036] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A multi-loop coolant temperature and flow rate control device for motor testing, characterized in that, Including control cabinet (10), the top end of control cabinet (10) is fixedly installed with water tank (11), plate heat exchanger (12) and water pump (13) are fixedly installed at the bottom end of control cabinet (10) respectively, the control cabinet (10) is equipped with the delivery assembly (14) that can deliver high-temperature water in water tank (11) to the temperature accurate control of motor and driver, and the backflow assembly (15) can make the hot water after cooling motor and driver flow back to the inside of water tank (11).

2. A multi-circuit coolant temperature and flow regulating device for testing electric machines as defined in claim 1, wherein, The delivery assembly (14) includes the water inlet pipe (141) that is communicatedly installed between water tank (11) and the water inlet of water pump (13), the water outlet pipe (142) is communicated with the water outlet of water pump (13), the both sides of plate heat exchanger (12) are provided with a plurality of interfaces (143), one end of a plurality of interfaces (143) is communicated with the first drain pipe (144).

3. A multi-circuit coolant temperature and flow regulating device for motor testing according to claim 2, wherein, A plurality of interfaces (143) are respectively communicated with the inlet and outlet of the bottom end of plate heat exchanger (12), the other end of a plurality of interfaces (143) is communicated with water outlet pipe (142), the inside of water tank (11) is provided with electric heater and stainless steel liquid level switch.

4. A multi-circuit coolant temperature and flow regulating device for testing electric machines as defined in claim 3, wherein, The water tank (11) is further provided with liquid level meter and sensor, the water tank (11) is inserted with overflow pipe.

5. A multi-circuit coolant temperature and flow regulating device for testing electric machines as defined in claim 2, wherein, Three groups of three-way valves (145) are arranged on the control cabinet (10), the branch pipe (146) is communicatedly installed on the water outlet pipe (142), one end of the branch pipe (146) is respectively communicated with the water inlets of three groups of three-way valves (145) through three branches, one end of three groups of three-way valves (145) is respectively communicated with the inlet of the top end of plate heat exchanger (12).

6. A multi-circuit coolant temperature and flow regulating device for testing electric machines as defined in claim 5, wherein, The outlet of the top end of plate heat exchanger (12) is communicated with the second drain pipe (147), the remaining end of three groups of three-way valves (145) is respectively communicated with the shunt pipe (148).

7. The multi-circuit coolant temperature and flow regulating device for motor testing of claim 1, wherein, The backflow assembly (15) includes three backflow pipes (151) that are communicatedly installed on water tank (11), flow proportional valve (152) and flow sensor (153) are respectively arranged on each backflow pipe (151).

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