Engine rapid cold and hot shock test equipment

Abstract

The utility model discloses a kind of engine rapid cold and hot impact test equipment, for the medium that flows through engine is carried out rapid cold and hot switching, comprising: frame body, cold and hot medium supply mechanism, temperature regulation mechanism and circulating pipeline control system;Cold and hot medium supply mechanism is installed on frame body and can provide hot medium and cold medium respectively;Temperature regulation mechanism is installed on frame body and connects cold and hot medium supply mechanism to heat and cool hot medium and cold medium respectively;Circulating pipeline control system is installed on frame body and connects cold and hot medium supply mechanism and engine to form circulating loop between cold and hot medium supply mechanism and engine.The utility model can omit traditional equipment medium secondary temperature rising step, greatly shorten cold and hot impact cycle time, improve test efficiency.

Description

Technical Field

[0001] This utility model relates to the field of engine testing technology, and in particular to an engine rapid thermal shock test device. Background Technology

[0002] Engine thermal shock testing is a key method for verifying the reliability of engines under extreme temperature alternation environments. With the upgrading of engine manufacturing technology, OEMs are placing higher demands on testing efficiency, requiring shorter individual thermal shock cycle times to adapt to efficient R&D and production paces.

[0003] Existing traditional thermal shock equipment uses a single liquid storage tank structure. When switching between hot and cold media, additional temperature control operations are required for the media inside the tank, resulting in a long cycle time and failing to meet the testing efficiency requirements of the new generation of engines. Utility Model Content

[0004] In order to solve the technical problems existing in the background art, this utility model proposes an engine rapid thermal shock test device.

[0005] This utility model proposes a rapid thermal shock test device for engines, used to rapidly switch the temperature of the medium flowing through the engine, comprising:

[0006] Frame, hot and cold medium supply mechanism, temperature control mechanism, and circulation pipeline control system;

[0007] The hot and cold medium supply mechanism is installed on the frame and can supply hot and cold media separately;

[0008] The temperature control mechanism includes a vortex tube mounted on the frame, which is connected to a hot and cold medium supply mechanism to heat and cool the hot and cold medium respectively.

[0009] The circulation pipeline control system is installed on the frame and connects the hot and cold medium supply mechanism to the engine to form a circulation loop between the hot and cold medium supply mechanism and the engine.

[0010] Preferably, the circulation pipeline control system includes a first circulation pipeline and a second circulation pipeline. The first circulation pipeline is connected to the hot and cold medium supply mechanism and the engine to provide hot medium to the engine, and the second circulation pipeline is connected to the hot and cold medium supply mechanism and the engine to provide cold medium to the engine.

[0011] Preferably, the vortex tube has a compressed air inlet, a cold end outlet, and a hot end outlet, and the hot and cold medium supply mechanism includes a hot water tank and a cold water tank installed on the frame; the hot water tank is connected to the hot end outlet of the vortex tube, and the cold water tank is connected to the cold end outlet of the vortex tube.

[0012] Preferably, spiral coils are installed in the inner walls of both the hot water tank and the cold water tank. The spiral coil in the hot water tank is connected to the hot end outlet of the vortex tube, and the spiral coil in the cold water tank is connected to the cold end outlet of the vortex tube.

[0013] Preferably, the circulation pipeline control system further includes a first pneumatic ball valve, a second pneumatic ball valve, a third pneumatic ball valve, a fourth pneumatic ball valve, a fifth pneumatic ball valve, and a sixth pneumatic ball valve.

[0014] Preferably, the second and third pneumatic ball valves are installed on the first circulation pipeline, and the fifth and sixth pneumatic ball valves are installed on the second circulation pipeline. The hot and cold medium supply mechanism also includes an expansion tank, which is connected to the first and second circulation pipelines through a bypass pipeline. The first and fourth pneumatic ball valves are installed on the bypass pipeline.

[0015] Preferably, the frame is also equipped with a plate heat exchanger connected to the cold water tank. The plate heat exchanger can introduce external cold water into the cold water tank to assist in cooling the medium inside the cold water tank.

[0016] The present invention proposes a rapid thermal shock test device for engines, which has the following advantages: it adopts a dual liquid storage structure with independent hot water tank and cold water tank and vortex tube pretreatment technology, and is combined with a pneumatic ball valve to quickly switch pipelines, eliminating the secondary heating and cooling steps of the medium in traditional equipment, greatly shortening the thermal shock cycle time and improving test efficiency. Attached Figure Description

[0017] Figure 1 This is an overall structural diagram of an engine rapid thermal shock testing device proposed in this utility model;

[0018] Figure 2 This is a schematic diagram of the rear end of an engine rapid thermal shock testing device proposed in this utility model. Detailed Implementation

[0019] refer to Figure 1-2 This utility model proposes a rapid thermal shock test device for engines, including: a frame 1, a thermal medium supply mechanism, a temperature control mechanism, and a circulation pipeline control system.

[0020] The hot and cold medium supply mechanism is installed on the frame 1 and can provide hot and cold medium respectively; the temperature control mechanism is installed on the frame 1 and connected to the hot and cold medium supply mechanism to heat and cool the hot and cold medium respectively; the circulation pipeline control system is installed on the frame 1 and connected to the hot and cold medium supply mechanism and the engine to form a circulation loop between the hot and cold medium supply mechanism and the engine.

[0021] The hot and cold medium supply mechanism includes a hot water tank 2, a cold water tank 3, and an expansion tank 14 installed on the frame 1. The hot water tank 2 is used to store the medium to be heated, the cold water tank 3 is used to store the medium to be cooled, and the expansion tank 14 is connected to the circulation pipeline control system through a bypass pipeline 12 to balance the pressure fluctuations of the medium in the entire circulation system.

[0022] Both the hot water tank 2 and the cold water tank 3 have spiral coils installed in their inner walls. The spiral coils are connected to the temperature control mechanism, and the temperature of the medium inside the tank is regulated by the energy output from the temperature control mechanism.

[0023] The temperature control mechanism includes a vortex tube mounted on the frame 1. The vortex tube has a compressed air inlet, a cold end outlet, and a hot end outlet. The hot end outlet of the vortex tube is connected to a spiral coil inside the hot water tank 2, transferring heat to the medium inside the hot water tank 2. The cold end outlet of the vortex tube is connected to a spiral coil inside the cold water tank 3, transferring cold energy to the medium inside the cold water tank 3, thereby achieving temperature pretreatment of the hot and cold media respectively.

[0024] The frame 1 is also equipped with a plate heat exchanger 13 connected to the cold water tank 3. The plate heat exchanger 13 is connected to the external cold water circuit and assists in cooling the medium in the cold water tank 3 through heat exchange, so as to maintain the low temperature state of the medium in the cold water tank 3.

[0025] The circulation pipeline control system includes a first circulation pipeline 4, a second circulation pipeline 5, a bypass pipeline 12, and a first pneumatic ball valve 6, a second pneumatic ball valve 7, a third pneumatic ball valve 8, a fourth pneumatic ball valve 9, a fifth pneumatic ball valve 10, and a sixth pneumatic ball valve 11.

[0026] The first circulation pipe 4 connects the hot water tank 2 in the hot and cold medium supply mechanism to the engine, and is used to supply the hot medium to the engine; the second circulation pipe 5 connects the cold water tank 3 in the hot and cold medium supply mechanism to the engine, and is used to supply the cold medium to the engine.

[0027] The second pneumatic ball valve 7 and the third pneumatic ball valve 8 are installed on the first circulation pipeline 4 to control the opening and closing of the first circulation pipeline 4; the fifth pneumatic ball valve 10 and the sixth pneumatic ball valve 11 are installed on the second circulation pipeline 5 to control the opening and closing of the second circulation pipeline 5. The two ends of the bypass pipeline 12 are connected to the first circulation pipeline 4 and the second circulation pipeline 5 respectively. The expansion tank 14 is connected to the system through the bypass pipeline 12. The first pneumatic ball valve 6 and the fourth pneumatic ball valve 9 are installed on the bypass pipeline 12 to control the opening and closing of the bypass pipeline 12.

[0028] The circulation pipeline control system also includes an electric three-way proportional valve and a circulating water pump. The electric three-way proportional valve is connected in the circulation pipeline and is used to adjust the flow ratio of the hot and cold media. The circulating water pump is installed in the circulation pipeline to provide power for the circulation of the media between the hot and cold media supply mechanism and the engine.

[0029] Start the engine and simultaneously start the circulating water pump. The vortex tube receives compressed air through the compressed air inlet and outputs heat at its hot end outlet, which heats the medium inside the hot water tank 2 via the spiral coil. Close the first pneumatic ball valve 6, the fourth pneumatic ball valve 9, the fifth pneumatic ball valve 10, and the sixth pneumatic ball valve 11. Open the second pneumatic ball valve 7 and the third pneumatic ball valve 8. Adjust the electric three-way proportional valve to fully open the engine-side pipeline. The circulating water pump delivers the hot medium from the hot water tank 2 to the engine through the first circulation pipeline 4, raising the engine outlet water temperature to the set thermal operating temperature.

[0030] Once the engine outlet water temperature reaches the set thermal operating temperature, the second pneumatic ball valve 7 and the third pneumatic ball valve 8 are closed, while the first pneumatic ball valve 6 and the fourth pneumatic ball valve 9 are opened. This allows the medium to form an auxiliary circulation with the expansion tank 14 through the bypass pipe 12, further stabilizing the medium temperature. At this time, the cooling opening of the electric three-way proportional valve increases, increasing the cooling water flow to balance the system temperature. When the temperature approaches the control temperature point, the electric three-way proportional valve automatically adjusts the ratio of hot and cold water flow through PID control to ensure that the engine inlet and outlet water temperatures remain within the set range, forming a stable circulation.

[0031] Start the engine and simultaneously start the circulating water pump. The vortex tube receives compressed air through the compressed air inlet and outputs cooling energy through its cold end outlet. This cooling energy is then used to cool the medium inside the cold water tank 3 via the spiral coil. The plate heat exchanger 13 is connected to an external cold water circuit to assist in cooling the medium inside the cold water tank 3. Close the first pneumatic ball valve 6, the fourth pneumatic ball valve 9, the second pneumatic ball valve 7, and the third pneumatic ball valve 8. Open the fifth pneumatic ball valve 10 and the sixth pneumatic ball valve 11. Adjust the electric three-way proportional valve to fully open the engine-side pipeline. The circulating water pump then delivers the cold medium from the cold water tank 3 to the engine through the second circulation pipeline 5, lowering the engine outlet water temperature to the set cold operating temperature.

[0032] Once the engine outlet water temperature reaches the set cold operating temperature, the fifth pneumatic ball valve 10 and the sixth pneumatic ball valve 11 are closed, while the first pneumatic ball valve 6 and the fourth pneumatic ball valve 9 are opened. This allows the medium to form an auxiliary circulation with the expansion tank 14 through the bypass pipe 12, further stabilizing the medium temperature. At this time, the cooling opening of the electric three-way proportional valve decreases, reducing the cooling water flow to maintain low-temperature stability. When the temperature approaches the control temperature point, the electric three-way proportional valve automatically adjusts the ratio of hot and cold water flow through PID control to ensure that the engine inlet and outlet water temperatures remain within the set range, forming a stable circulation.

[0033] The expansion tank 14 is connected to the system through the bypass pipe 12. When the medium in the circulation pipe expands or contracts due to temperature changes, the expansion tank 14 can absorb or replenish the medium to balance the pressure fluctuations in the system and prevent abnormal pipeline pressure from affecting the operation of the equipment.

[0034] The plate heat exchanger 13 works in conjunction with the cold water tank 3. Through heat exchange between the external cold water and the medium inside the cold water tank 3, it continuously cools the medium inside the cold water tank 3, ensuring that the cold medium is always kept at a low temperature that meets the test requirements, thus ensuring the stable realization of the cold shock condition.

[0035] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A rapid thermal shock test apparatus for an engine, used for rapidly switching between hot and cold temperatures on a medium flowing through the engine, characterized in that, include: The frame (1), the hot and cold medium supply mechanism, the temperature control mechanism, and the circulation pipeline control system; The hot and cold medium supply mechanism is installed on the frame (1) and can provide hot and cold medium respectively; The temperature control mechanism includes a vortex tube installed on the frame (1), which is connected to a hot and cold medium supply mechanism to heat and cool the hot medium and the cold medium respectively; The circulation pipeline control system is installed on the frame (1) and connected to the hot and cold medium supply mechanism and the engine to form a circulation loop between the hot and cold medium supply mechanism and the engine.

2. The rapid thermal shock testing equipment for engines according to claim 1, characterized in that, The circulation pipeline control system includes a first circulation pipeline (4) and a second circulation pipeline (5). The first circulation pipeline (4) connects the hot and cold medium supply mechanism to the engine to provide hot medium to the engine, and the second circulation pipeline (5) connects the hot and cold medium supply mechanism to the engine to provide cold medium to the engine.

3. The rapid thermal shock testing equipment for engines according to claim 2, characterized in that, The vortex tube has a compressed air inlet, a cold end outlet and a hot end outlet. The hot and cold medium supply mechanism includes a hot water tank (2) and a cold water tank (3) installed on the frame (1). The hot water tank (2) is connected to the hot end outlet of the vortex tube, and the cold water tank (3) is connected to the cold end outlet of the vortex tube.

4. The rapid thermal shock testing equipment for engines according to claim 3, characterized in that, Spiral coils are installed in the inner walls of both the hot water tank (2) and the cold water tank (3). The spiral coil in the hot water tank (2) is connected to the hot end outlet of the vortex tube, and the spiral coil in the cold water tank (3) is connected to the cold end outlet of the vortex tube.

5. The rapid thermal shock testing equipment for engines according to claim 1, characterized in that, The circulation pipeline control system also includes a first pneumatic ball valve (6), a second pneumatic ball valve (7), a third pneumatic ball valve (8), a fourth pneumatic ball valve (9), a fifth pneumatic ball valve (10), and a sixth pneumatic ball valve (11).

6. The rapid thermal shock testing equipment for engines according to claim 5, characterized in that, The second pneumatic ball valve (7) and the third pneumatic ball valve (8) are installed on the first circulation pipeline (4), and the fifth pneumatic ball valve (10) and the sixth pneumatic ball valve (11) are installed on the second circulation pipeline (5). The hot and cold medium supply mechanism also includes an expansion tank (14), which is connected to the first circulation pipeline (4) and the second circulation pipeline (5) through a bypass pipeline (12). The first pneumatic ball valve (6) and the fourth pneumatic ball valve (9) are installed on the bypass pipeline (12).

7. The rapid thermal shock testing equipment for engines according to claim 4, characterized in that, The frame (1) is also equipped with a plate heat exchanger (13) connected to the cold water tank (3). The plate heat exchanger (13) can introduce external cold water into the cold water tank (3) to assist in cooling the medium in the cold water tank (3).

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