Modularized centralized water cooling system for retarder test

Abstract

The utility model relates to a cooling system for a test, and aims to solve the problems of low equipment utilization rate, low control precision, high failure rate, loud noise and repeated heat dissipation of the conventional independent cooling system, or the problems of narrow application range or complex structure of the conventional cooling system. The modularized centralized water cooling system for the retarder test is provided. The system comprises a water circulation unit, a refrigeration unit, an electric control unit and a plurality of retarder test stands. The water circulation unit comprises a cooling water tank, a temperature sensor arranged in the cooling water tank, an inner circulation pipeline and an outer circulation pipeline; the refrigeration unit comprises a plurality of modularized refrigeration units, and the cooling water input end of each retarder test bench is provided with an electromagnetic regulating valve. The water temperature of the cooling water tank is monitored in real time, the starting and stopping number and frequency of the refrigerating units are intelligently controlled according to loads, the utilization rate of the modularized refrigerating units is improved, and the service life of each modularized refrigerating unit can be prolonged.

Description

Technical Field

[0001] The utility model relates to a cooling system for testing, in particular to a modular centralized water cooling system for retarder testing. Background Art

[0002] The hydraulic retarder (hereinafter referred to as the retarder) is a device that converts the kinetic energy of the vehicle into heat energy and dissipates the heat through a heat exchanger. Before leaving the factory, the retarder usually needs to be tested offline on a test bench. The test water cooling system provides constant temperature and constant pressure coolant to absorb the heat generated by the retarder during the test run, and then dissipates the heat through the refrigeration unit, thereby ensuring that the oil temperature is constant within a certain range during the retarder testing process.

[0003] The existing retarder test bench cooling system is mostly an independent cooling system, including refrigeration units, water pumps, water tanks, pipelines and other components arranged around the test bench, but the system has the following disadvantages:

[0004] 1) There are many test conditions for the retarder. The independent cooling system is mostly configured according to the maximum cooling power of the test bench. In the actual application scenario, the maximum power usage period of the refrigeration unit is short, which often leads to long-term low-power operation of the refrigeration unit and low equipment utilization rate; 2) Independent cooling systems mostly use fixed-frequency water pumps to control the water flow, and the control accuracy is low. The water pressure and water flow are often unstable during operation, making it difficult to ensure the constant oil temperature of the retarder test, which often leads to unstable test result data; 3) The water tank of the independent cooling system is small, and the water temperature changes rapidly during use, resulting in frequent start and stop of the refrigeration unit and a high failure rate; 4) The independent cooling system is noisy during operation, which can easily affect the health of operators; 5) Independent cooling systems are often placed in factory buildings, and the heat dissipated is also discharged in the factory building, resulting in high working environment temperature, and the factory air conditioner often needs to be repeatedly cooled for heat dissipation. In summary, the independent cooling system has the disadvantages of low equipment utilization, low control accuracy, high failure rate, high noise and repeated heat dissipation.

[0005] Chinese patent CN107965964A discloses an engine test cooling circulating water device, including a heat exchanger outer circulating water jacket, a heat exchanger inner circulating water jacket, a cooling water solenoid valve, a cooling water pump, a circulating water pump, and an engine. A heat exchanger inner circulating water jacket is arranged in the heat exchanger outer circulating water jacket, and the heat exchanger outer circulating water jacket is respectively connected to the heat exchanger outlet joint and the heat exchanger inlet joint, the heat exchanger outlet joint is connected to the cooling water tank and the cooling water pump through a pipeline, the heat exchanger inner circulating water inlet joint is connected to the engine outlet joint through a pipeline, and the circulating water solenoid valve and the circulating water solenoid valve are connected to the engine inlet joint through a pipeline. The patent can better control the inlet water temperature when the engine is running, and can ensure that the cooling water inside the engine is in circulation when the engine is stopped, and at the same time meet the requirements of the engine general test and the high water temperature cold and hot cycle test, and can be applied to the automotive gasoline engine test technology field. However, the shortcomings of the patent are: no pressure sensor is provided, and the constant pressure of the cooling water at the preset position cannot be controlled, and the application range is narrow.

[0006] Chinese patent CN216057970U relates to the field of refrigeration, which discloses a dual-circulation cooling system that can cool down network equipment and is easy to maintain. The system includes: an internal circulation system, a temperature control unit and an external circulation system, and the temperature control unit is arranged between the internal circulation system and the external circulation system; the internal circulation system is used to exchange heat with the network equipment to cool the network equipment; the temperature control unit is used to exchange heat between the internal circulation system and the external circulation system. However, the disadvantage of this patent is that the structure is complex. Utility Model Content

[0007] The utility model aims to solve the problems of low equipment utilization, low control accuracy, high failure rate, high noise and repeated heat dissipation in existing independent cooling systems, or the problems of narrow application of existing cooling systems or complex structure of existing cooling systems, and to provide a modular centralized water cooling system for retarder testing.

[0008] To achieve the above purpose, the technical solution provided by the utility model is:

[0009] A modular centralized water cooling system for retarder testing, which is special in that:

[0010] Includes water circulation unit, refrigeration unit, electronic control unit and multiple retarder test benches;

[0011] The water circulation unit includes a cooling water tank, a temperature sensor arranged in the cooling water tank, an internal circulation pipeline and an external circulation pipeline; the internal circulation pipeline includes an internal circulation input pipeline and an internal circulation output pipeline connected to the cooling water tank, and an electronic descaling device and a plurality of internal circulation pumps arranged in parallel on the internal circulation output pipeline; the external circulation pipeline includes an external circulation output pipeline and an external circulation input pipeline connected to the cooling water tank, and a plurality of external circulation pumps and a plurality of pressure sensors arranged in parallel on the external circulation output pipeline; the cooling water tank includes an internal circulation first end, an internal circulation second end, an external circulation input end and an external circulation output end; the internal circulation input pipeline is connected to the internal circulation first end of the cooling water tank, and the internal circulation output pipeline is connected to the internal circulation second end of the cooling water tank; the external circulation output pipeline is connected to the external circulation output end of the cooling water tank, and the external circulation input pipeline is connected to the external circulation input end of the cooling water tank;

[0012] The refrigeration unit includes a plurality of modular refrigeration units, each of which includes an input end and an output end, the input end is connected to the internal circulation input pipeline, and the output end is connected to the internal circulation output pipeline;

[0013] The electric control unit is electrically connected to each internal circulation pump, external circulation pump, pressure sensor, temperature sensor and modular refrigeration unit;

[0014] The retarder test bench comprises a cooling water input end and a cooling water output end, wherein the cooling water input end of each retarder test bench is connected to an external circulation output pipeline, and the cooling water output end is connected to an external circulation input pipeline; wherein the cooling water input end of each retarder test bench is provided with an electromagnetic regulating valve.

[0015] Furthermore, the cooling water tank is connected to a water source through a water source pipeline, and a water source control valve is provided on the water source pipeline.

[0016] Furthermore, the external circulation pump is a variable frequency pump.

[0017] Furthermore, each output end of the internal circulation pump and the external circulation pump is provided with a first pump control valve; a second pump control valve is provided on the total output end after the internal circulation pump and the external circulation pump are connected in parallel; and a plurality of branch control valves are provided on the external circulation output pipeline and the external circulation input pipeline.

[0018] Furthermore, the first pump control valve, the second pump control valve and the branch control valve are all manual valves.

[0019] Furthermore, the number of the modular refrigeration units is three; the number of the retarder test benches is nine; the number of the internal circulation pumps and the number of the external circulation pumps are two; and the number of the branch control valves is four.

[0020] Compared with the prior art, the beneficial effects of the utility model are:

[0021] 1. The utility model provides a modular centralized water cooling system for retarder testing, which can uniformly control multiple modular refrigeration units. Aiming at the staggered peak of the maximum refrigeration demand of multiple test benches, the water temperature of the cooling water tank is monitored in real time, and the start and stop quantity and frequency of the refrigeration unit are intelligently controlled according to the load, thereby improving the utilization rate of the modular refrigeration unit and reducing the equipment operation cost. At the same time, it has the function of balancing the operating time of each modular refrigeration unit, which can extend the service life of each modular refrigeration unit and save 40% of the number of refrigeration units.

[0022] 2. The utility model provides a modular centralized water cooling system for retarder testing, which monitors the water pressure in the external circulation input pipeline in real time through a pressure sensor and an electronic control unit, and adjusts the power of the external circulation pump according to the water demand and water pressure of the retarder test bench. The external circulation pump is a variable frequency pump to ensure the constant pressure of the coolant in the external circulation pipeline. At the same time, a high-precision electromagnetic regulating valve is integrated on the test bench to quickly and accurately control the water flow according to the test conditions, thereby ensuring that the retarder test oil temperature is constant and the test results are stable.

[0023] 3. The modular centralized water cooling system for retarder testing provided by the utility model adopts a large-volume cooling water tank to ensure that the coolant temperature is relatively constant, avoid frequent start and stop of the refrigeration unit, and reduce the occurrence rate of equipment failure.

[0024] 4. The utility model provides a modular centralized water cooling system for retarder testing. The modular refrigeration unit is placed outside the air-conditioned plant, which saves the refrigeration power of the air-conditioning unit in the plant, reduces the equipment noise in the plant, and improves the working environment.

[0025] 5. The utility model provides a modular centralized water cooling system for retarder testing, which adopts a highly independent single-machine module, has good maintainability, high versatility, high flexibility, and can be purchased in batches, avoiding excessive single investment. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of an embodiment of a modular centralized water cooling system for retarder testing of the utility model;

[0027] Description of reference numerals:

[0028] 1-modular refrigeration unit; 21-internal circulation pump, 22-internal circulation input pipeline, 23-internal circulation output pipeline, 24-cooling water tank, 25-temperature sensor, 26-electronic descaling device, 27-external circulation pump, 28-external circulation output pipeline, 29-external circulation input pipeline, 210-pressure sensor; 3-electronic control unit; 4-retarder test bench, 41-electromagnetic regulating valve; 51-water source pipeline, 52-water source, 53-water source control valve; 61-first pump control valve, 62-second pump control valve, 63-branch control valve. DETAILED DESCRIPTION

[0029] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0030] See also Figure 1 , a modular centralized water cooling system for retarder testing in this embodiment includes a water circulation unit, a refrigeration unit, an electronic control unit 3 and nine retarder test benches 4;

[0031] The water circulation unit includes a cooling water tank 24, a temperature sensor 25 arranged in the cooling water tank 24, an internal circulation pipeline and an external circulation pipeline; the internal circulation pipeline includes an internal circulation input pipeline 22 and an internal circulation output pipeline 23 connected to the cooling water tank 24, and an electronic descaling device 26 arranged on the internal circulation output pipeline 23 and two internal circulation pumps 21 arranged in parallel; the electronic descaling device 26 is used to remove scale in the coolant, and the temperature sensor 25 is used to monitor the cooling water temperature in the cooling water tank 24 and upload it to the electronic control unit 3;

[0032] The external circulation pipeline includes an external circulation output pipeline 28 and an external circulation input pipeline 29 connected to the cooling water tank 24, and two external circulation pumps 27 and two pressure sensors 210 arranged in parallel on the external circulation output pipeline 28, and the external circulation pump 27 is a high-precision variable frequency pump; the cooling water tank 24 includes an internal circulation first end, an internal circulation second end, an external circulation input end and an external circulation output end; the internal circulation input pipeline 22 is connected to the internal circulation first end of the cooling water tank 24, and the internal circulation output pipeline 23 is connected to the internal circulation second end of the cooling water tank 24; the external circulation output pipeline 28 is connected to the external circulation output end of the cooling water tank 24, and the external circulation input pipeline 29 is connected to the external circulation input end of the cooling water tank 24; the pressure sensor 210 is used to monitor the pressure and upload it to the electronic control unit 3;

[0033] The refrigeration unit includes three modular refrigeration units 1, each modular refrigeration unit 1 includes an input end and an output end, the input end is connected to the internal circulation input pipeline 22, and the output end is connected to the internal circulation output pipeline 23; in other embodiments, the number of modular refrigeration units 1 can be increased or decreased according to actual needs.

[0034] The electric control unit 3 is electrically connected to each internal circulation pump 21, the external circulation pump 27, the pressure sensor 210, the temperature sensor 25 and the modular refrigeration unit 1;

[0035] The retarder test bench 4 includes a cooling water input end and a cooling water output end, wherein the cooling water input end of each retarder test bench 4 is connected to the external circulation output pipeline 28, and the cooling water output end is connected to the external circulation input pipeline 29; wherein the cooling water input end of each retarder test bench 4 is provided with an electromagnetic regulating valve 41. The electromagnetic regulating valve 41 is used to control the cooling water flow of each retarder test bench 4.

[0036] In this embodiment, the cooling water tank 24 is connected to a water source 52 via a water source pipeline 51 , and a water source control valve 53 is provided on the water source pipeline 51 .

[0037] To ensure the safety of the pipeline, a first pump control valve 61 is provided at the output end of each internal circulation pump 21 and external circulation pump 27; a second pump control valve 62 is provided on the total output end after the internal circulation pump 21 and the external circulation pump 27 are connected in parallel; four branch control valves 63 are provided on the external circulation output pipeline 28 and the external circulation input pipeline 29; the first pump control valve 61, the second pump control valve 62 and the branch control valve 63 are all manual valves.

[0038] The working process of the modular centralized water cooling system for the above retarder test is divided into two parts: external circulation heat absorption and internal circulation heat dissipation.

[0039] External circulation heat absorption process: During the retarder test bench test, the two external circulation pumps 27 are uniformly controlled by the electronic control unit 3. The rotation speed of the external circulation pump 27 is controlled according to the water flow demand of the retarder test bench 4 and the water pressure value measured by the pressure sensor 210, so as to ensure that the external circulation pipeline is filled with constant pressure coolant. The electromagnetic regulating valve 41 is uniformly controlled by the retarder test bench 4, and the water flow is quickly and accurately controlled according to the test conditions. The coolant passes through the retarder and absorbs the heat generated by the retarder, ensuring that the retarder oil temperature is constant during the test process and obtaining a stable test result. The coolant after absorbing the heat returns to the cooling water tank 24 through the external circulation input pipeline 29.

[0040] Internal circulation heat dissipation process: The three modular refrigeration units 1 are uniformly controlled by the electronic control unit 3. According to the cooling load demand of the coolant measured by the temperature sensor 25 in the cooling water tank 24, the number of refrigeration units 1 started is intelligently controlled, and the internal circulation pump 21 is turned on at the same time. The coolant is transported to the corresponding module refrigeration unit 1 through the internal circulation pipeline. The electronic descaling device 26 on the pipeline is used to clean the scale in the coolant. The refrigeration unit cools the coolant and outputs constant temperature coolant, which returns to the cooling water tank 24 through the internal circulation input pipeline 22.

Claims

1. A modular centralized water cooling system for retarder testing, characterized in that: It comprises a water circulation unit, a refrigeration unit, an electronic control unit (3) and a plurality of retarder test benches (4); The water circulation unit comprises a cooling water tank (24), a temperature sensor (25) arranged in the cooling water tank (24), an internal circulation pipeline and an external circulation pipeline; the internal circulation pipeline comprises an internal circulation input pipeline (22) and an internal circulation output pipeline (23) connected to the cooling water tank (24), an electronic descaling device (26) arranged on the internal circulation output pipeline (23) and a plurality of internal circulation pumps (21) arranged in parallel; the external circulation pipeline comprises an external circulation output pipeline (28) and an external circulation input pipeline (29) connected to the cooling water tank (24), and an electronic descaling device (26) arranged on the internal circulation output pipeline (23) and a plurality of internal circulation pumps (21) arranged in parallel A plurality of external circulation pumps (27) and a plurality of pressure sensors (210) are arranged in parallel on the pipeline (28); the cooling water tank (24) comprises an internal circulation first end, an internal circulation second end, an external circulation input end and an external circulation output end; the internal circulation input pipeline (22) is connected to the internal circulation first end of the cooling water tank (24), and the internal circulation output pipeline (23) is connected to the internal circulation second end of the cooling water tank (24); the external circulation output pipeline (28) is connected to the external circulation output end of the cooling water tank (24), and the external circulation input pipeline (29) is connected to the external circulation input end of the cooling water tank (24); The refrigeration unit comprises a plurality of modular refrigeration units (1), each modular refrigeration unit (1) comprises an input end and an output end, the input end is connected to an internal circulation input pipeline (22), and the output end is connected to an internal circulation output pipeline (23); The electric control unit (3) is electrically connected to each internal circulation pump (21), the external circulation pump (27), the pressure sensor (210), the temperature sensor (25) and the modular refrigeration unit (1); The retarder test bench (4) comprises a cooling water input end and a cooling water output end, wherein the cooling water input end of each retarder test bench (4) is connected to an external circulation output pipeline (28), and the cooling water output end is connected to an external circulation input pipeline (29); wherein the cooling water input end of each retarder test bench (4) is provided with an electromagnetic regulating valve (41).

2. The modular centralized water cooling system for retarder testing according to claim 1 is characterized by: The cooling water tank (24) is connected to a water source (52) via a water source pipeline (51), and a water source control valve (53) is provided on the water source pipeline (51).

3. The modular centralized water cooling system for retarder testing according to claim 2 is characterized by: The external circulation pump (27) is a variable frequency pump.

4. The modular centralized water cooling system for retarder testing according to any one of claims 1 to 3, characterized in that: Each output end of the inner circulation pump (21) and the outer circulation pump (27) is provided with a first pump control valve (61); a second pump control valve (62) is provided on the total output end of the inner circulation pump (21) and the outer circulation pump (27) connected in parallel; and a plurality of branch control valves (63) are provided on the outer circulation output pipeline (28) and the outer circulation input pipeline (29).

5. The modular centralized water cooling system for retarder testing according to claim 4 is characterized by: The first pump control valve (61), the second pump control valve (62) and the branch control valve (63) are all manual valves.

6. The modular centralized water cooling system for retarder testing according to claim 4 is characterized by: The number of the modular refrigeration units (1) is three; the number of the retarder test benches (4) is nine; the number of the internal circulation pumps (21) and the number of the external circulation pumps (27) are both two; and the number of the branch control valves (63) is four.

Images