Water temperature control device for engine bench test

Abstract

The invention discloses a water temperature control device for an engine bench test, and the device comprises a main pipeline, the water inlet of the main pipeline is communicated with the water outlet of an engine, and the water outlet of the main pipeline is communicated with the water inlet of the engine; the heat exchanger comprises a heat exchange pipeline and a conveying pipeline, a water inlet and a water outlet of the conveying pipeline are both communicated with the main pipeline, and the water outlet of the conveying pipeline is communicated with the main pipeline through a first three-way proportional valve; the heat exchanger is used for regulating and controlling the temperature of water in the main pipeline, water in the main pipeline flows into the conveying pipeline and then exchanges heat with the heat exchange pipeline, temperature rising or cooling is achieved, water in the conveying pipeline flows out and then is mixed with the main pipeline, the mixing proportion is controlled through the first three-way proportional valve, and the mixing efficiency is improved. And after the mixed water temperature reaches the temperature required by the test, the mixed water flows into the engine to realize regulation and control of the water temperature.

Description

Technical Field

[0001] The invention belongs to the technical field of engine bench test, and in particular relates to a water temperature control device for engine bench test. Background Art

[0002] Engine bench test refers to certain simulated bench tests that must be carried out before the product leaves the factory. Only after passing the test can it be put into use. When conducting engine bench performance test, the temperature directly affects the working performance of the engine. Therefore, an external water temperature control device is needed to control the water temperature of the engine and test the parameters of the engine under various water temperature conditions. Summary of the invention

[0003] The object of the present invention is to provide a water temperature control device for engine bench testing to solve at least one of the above-mentioned technical problems.

[0004] To achieve the above object, the technical solution adopted by the present invention is:

[0005] A water temperature control device for engine bench testing, comprising:

[0006] A main pipe, a water inlet of the main pipe is connected to a water outlet of the engine, and a water outlet of the main pipe is connected to a water inlet of the engine;

[0007] A heat exchanger comprises a heat exchange pipeline and a delivery pipeline, wherein the water inlet and the water outlet of the delivery pipeline are both connected to the main pipeline, wherein the water outlet of the delivery pipeline is connected to the main pipeline via a first three-way proportional valve, and the first three-way proportional valve controls the opening and closing degree of its two inlets and one outlet.

[0008] The present invention uses a main pipeline to lead out water in the engine, which is convenient for temperature control of the water in the engine, and can also monitor and control the water flow; a heat exchanger is used to control the temperature of the water in the main pipeline. After the water in the main pipeline flows into the delivery pipeline, it exchanges heat with the heat exchange pipeline to achieve temperature increase or decrease. After the water in the delivery pipeline flows out, it mixes with the water in the main pipeline. The mixing ratio is controlled by a first three-way proportional valve. After the temperature of the mixed water reaches the temperature required for the test, it flows into the engine to achieve water temperature control.

[0009] Furthermore, a first manual valve is provided at the water inlet end of the delivery pipeline, which can control the water in the main pipeline to flow into the delivery pipeline.

[0010] Furthermore, it also includes a heater, the water inlet and the water outlet of the heater are both connected to the main pipeline, wherein the water outlet of the heater is connected to the main pipeline through a second three-way proportional valve, the second three-way proportional valve controls the opening and closing degree of its two inlets and one outlet, the second three-way proportional valve is located between the water outlet of the main pipeline and the first three-way proportional valve, the connection point between the water inlet of the heater and the main pipeline is located between the first three-way proportional valve and the second three-way proportional valve, and a second manual valve is provided at the water inlet end of the heater, and the heater can be used to heat the water in the main pipeline, so that the heat exchanger is only used to reduce the water temperature, which is convenient for rapid switching of various water temperatures and is conducive to saving test Test time; when it is necessary to heat the water, close the first manual valve to prevent the water from flowing into the delivery pipeline, and the first three-way proportional valve also closes the inlet connected to the delivery pipeline, so that the cold water in the delivery pipeline cannot flow into the main pipeline. The water in the main pipeline flows into the heater and is heated, then flows out and mixes with the water in the main pipeline. The mixing ratio is controlled by the second three-way proportional valve, so that the water temperature reaches the temperature required for the test and then flows into the engine; when it is necessary to cool the water, the water is cooled only by the heat exchanger, and the second manual valve can be closed to prevent the water in the main pipeline from flowing into the heater. The inlet connected to the water outlet of the heater can also be closed to isolate the water in the heater from the water in the main pipeline to avoid affecting the cooling of the water.

[0011] Preferably, it also includes a heater, the water inlet of the heater is connected to the main pipeline and is located between the water outlet of the engine and the water inlet of the delivery pipeline, the water outlet of the heater is connected to the water outlet end of the delivery pipeline, and the water inlet end of the heater is provided with a second manual valve; the heater is used for heating by the provided heater, so that the provided heat exchanger is only used to reduce the water temperature, which is convenient for rapid switching of various water temperatures and is conducive to saving test time; the heater and the heat exchanger are arranged in parallel, the water outlet of the heater is connected to the first three-way proportional valve through the water outlet end of the delivery pipeline, and the water outlet of the heater and the water outlet of the delivery pipeline share the first three-way proportional valve for mixing water, which can reduce the production cost of the device; the water inlet of the engine is directly connected to the first three-way proportional valve, which can shorten the time for water to flow to the engine after the temperature is adjusted The path of the engine water inlet is used to reduce the water temperature change on this path. No matter whether the water is heated or cooled during water temperature control, more accurate water temperature control can be achieved. By connecting the heater and the heat exchanger in parallel, the length of the main pipeline can be shortened, the water temperature change when the water flows through the main pipeline can be reduced, and the cost of the device can be reduced. The path for the water to flow from the water outlet of the engine into the heater and then into the engine is also shortened, so the water temperature can be controlled more quickly. When it is necessary to heat the water, the first manual valve is closed, and the water in the engine directly enters the heater from the main pipeline for heating, and then is mixed with the water in the main pipeline through the first three-way proportional valve, and then flows directly into the engine after mixing. When it is necessary to cool the water, the second manual valve is closed to prevent the water from entering the heater, and the water temperature is controlled by the heat exchanger.

[0012] Further, the main line located between the delivery pipelines is defined as the first branch, the main line located between the first branch and the water outlet of the engine is defined as the second branch, and the main line located between the first branch and the water inlet of the engine is defined as the third branch;

[0013] The water inlet of the second branch is connected to the first branch, the water inlet of the heater, and the water inlet of the delivery pipeline through a four-way joint. The first branch, the heater and the delivery pipeline are arranged in parallel, which can shorten the length of the main pipeline and the water circulation path, and is more conducive to regulating the water temperature.

[0014] Furthermore, the first branch, the heater and the delivery pipeline are all arranged side by side in the horizontal direction, which is beneficial to the spatial layout and can reduce the space occupied by the device. The heater is arranged horizontally, which can reduce the risk of dry burning of the heating wire in the heater.

[0015] Furthermore, it also includes a water injection tank connected to the main line, the water injection tank is located above the main line, the top of the water injection tank is provided with a water injection port, and the water injection port is provided with a third manual valve. Before conducting an engine bench test, water is first injected into the water injection tank through the water injection port to fill the main line, the heat exchanger and the heater with water. During the test, the third manual valve needs to be closed to prevent water from flowing out of the water injection port.

[0016] Furthermore, the engine is connected to the side wall of the water injection tank through two auxiliary pipes, and a fourth manual valve is provided on the auxiliary pipe. The existing engine water circulation is also provided with two exhaust outlets, and the exhaust outlets are connected to the water injection tank through the two auxiliary pipes, so that the gas in the engine water circulation can be discharged into the water injection tank together with the water in the engine through the two auxiliary pipes. The water discharged into the water injection tank from the auxiliary pipe flows into the main pipeline again and returns to the entire cycle. The connection between the auxiliary pipe and the water injection tank can be controlled by the fourth manual valve.

[0017] Furthermore, a flow meter is provided at the water inlet of the main pipeline, which is used for flow statistics at the water inlet of the main pipeline and can also measure the flow velocity.

[0018] Furthermore, it also includes a water pump, the water inlet and water outlet of the water pump are connected to the main pipeline, and a fifth manual valve is provided on the main pipeline between the water inlet and water outlet of the water pump. The arranged water pump can provide power for the water circulation of the main pipeline. When the water pump is needed, the fifth manual valve is closed, and when the water pump is not in use, the fifth manual valve is opened.

[0019] Furthermore, it also includes a cold water tank, and the two ends of the heat exchange pipeline are respectively connected to the water inlet and the water outlet of the cold water tank. The cold water tank is provided with a pump for driving the refrigerant to provide refrigerant for the heat exchanger.

[0020] Furthermore, a third three-way proportional valve is provided at the water outlet of the cold water tank, the inlet of the third three-way proportional valve is connected with the water outlet of the cold water tank, and the other two outlets are respectively connected with the heat exchange pipeline and the water inlet of the cold water tank. The third three-way proportional valve controls the opening and closing degree of its one inlet and two outlets, and the third three-way proportional valve is used to control the flow rate of the refrigerant into the heat exchanger.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] (1) The present invention uses a main pipe to lead out the water in the engine, which is convenient for temperature control of the water in the engine, and can also monitor and control the water flow; a heat exchanger is used to control the temperature of the water in the main pipe. After the water in the main pipe flows into the delivery pipe, it exchanges heat with the heat exchange pipe to achieve temperature increase or decrease. After the water in the delivery pipe flows out, it mixes with the water in the main pipe. The mixing ratio is controlled by a first three-way proportional valve. After the temperature of the mixed water reaches the temperature required for the test, it flows into the engine to achieve water temperature control.

[0023] (2) The present invention can shorten the length of the main pipeline and the water circulation path by arranging the first branch, the heater and the delivery pipeline in parallel, which is more conducive to regulating the water temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the connection structure of a water temperature control device for engine bench testing in Example 1;

[0025] Figure 2 Schematic diagram of the connection structure of a water temperature control device for an engine bench test in Example 2; in the figure: 1, main pipeline; 2, heat exchanger; 201, heat exchange pipeline; 202, delivery pipeline; 3, first three-way proportional valve; 4, first manual valve; 5, heater; 6, second three-way proportional valve; 7, second manual valve; 8, water injection tank; 9, water injection port; 10, third manual valve; 11, auxiliary pipe; 12, fourth manual valve; 13, flow meter; 14, water pump; 15, fifth manual valve; 16, cold water tank; 17, third three-way proportional valve. DETAILED DESCRIPTION

[0026] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] Example 1

[0028] like Figure 1 As shown, this embodiment provides a water temperature control device for engine bench testing, including a main line 1, a heat exchanger 2, a heater 5 and a cold water tank 16.

[0029] The water inlet of the main line 1 is connected to the water outlet of the engine, and the water outlet of the main line 1 is connected to the water inlet of the engine. The engine provides power for the water circulation of the main line 1.

[0030] The heat exchanger 2 includes a heat exchange pipeline 201 and a delivery pipeline 202. The two ends of the heat exchange pipeline 201 are respectively connected to the water inlet and the water outlet of the cold water tank 16. The cold water tank 16 is provided to provide refrigerant for the heat exchanger 2 to achieve cooling of the water. The cold water tank 16 is provided with a pump for driving the refrigerant. Further, a third three-way proportional valve 17 is provided at the water outlet of the cold water tank 16. The inlet of the third three-way proportional valve 17 is connected to the water outlet of the cold water tank 16, and the other two outlets are respectively connected to the heat exchange pipeline 201 and the water inlet of the cold water tank 16. The third three-way proportional valve 17 controls the opening and closing degree of one inlet and two outlets thereof. The third three-way proportional valve 17 is used to control the flow rate of the refrigerant flowing into the heat exchanger 2. The water inlet and outlet of the delivery pipeline 202 are both connected to the main pipeline 1, wherein the water outlet of the delivery pipeline 202 is connected to the main pipeline 1 through a first three-way proportional valve 3, and the first three-way proportional valve 3 controls the opening and closing degree of its two inlets and one outlet. A first manual valve 4 is provided at the water inlet end of the delivery pipeline 202, which can control the water flow in the main pipeline 1 into the delivery pipeline 202.

[0031] The water inlet and outlet of the heater 5 are both connected to the main pipeline 1, wherein the water outlet of the heater 5 is connected to the main pipeline 1 through a second three-way proportional valve 6, the second three-way proportional valve 6 controls the opening and closing degree of its two inlets and one outlet, the second three-way proportional valve 6 is located between the water outlet of the main pipeline 1 and the first three-way proportional valve 3, the connection point between the water inlet of the heater 5 and the main pipeline 1 is located between the first three-way proportional valve 3 and the second three-way proportional valve 6, and a second manual valve 7 is provided at the water inlet end of the heater 5, the heater 5 can be used to heat the water in the main pipeline 1, so that the heat exchanger 2 is only used to reduce the water temperature, which is convenient for the rapid switching of various water temperatures and is conducive to saving test time; when it is necessary to heat the water, close the first manual valve 4, so that water cannot flow into the delivery pipeline 202, the first three-way proportional valve 3 also closes the inlet connected to the delivery pipeline 202, so that the cold water in the delivery pipeline 202 cannot flow into the main pipeline 1, the water in the main pipeline 1 flows into the heater 5 and is heated, and then flows out and mixes with the water in the main pipeline 1, and the mixing ratio is controlled by the second three-way proportional valve 6, so that the water temperature reaches the temperature required for the test and then flows into the engine; when it is necessary to cool the water, the water is cooled only by the heat exchanger 2, the second manual valve 7 can be closed, so that the water in the main pipeline 1 cannot flow into the heater 5, and the inlet of the second three-way proportional valve 6 connected to the water outlet of the heater 5 can also be closed, so that the water in the heater 5 is isolated from the water in the main pipeline 1 to avoid affecting the cooling of the water.

[0032] The present invention provides a main pipe 1 for leading out water in the engine, which is convenient for temperature control of the water in the engine, and can also monitor and control the water flow; the heat exchanger 2 is provided for controlling the temperature of the water in the main pipe 1. After the water in the main pipe 1 flows into the delivery pipe 202, it exchanges heat with the heat exchange pipe 201 to achieve heating or cooling. After the water in the delivery pipe 202 flows out, it mixes with the water in the main pipe 1. The mixing ratio is controlled by the first three-way proportional valve 3. After the temperature of the mixed water reaches the temperature required for the test, it flows into the engine to achieve water temperature control.

[0033] Furthermore, the present embodiment includes a water injection tank 8 connected to the main line 1, the water injection tank 8 is located above the main line 1, a water injection port 9 is provided on the top of the water injection tank 8, and a third manual valve 10 is provided at the water injection port 9. Before conducting an engine bench test, water is first injected into the water injection tank 8 through the water injection port 9 to fill the main line 1, the heat exchanger 2 and the heater 5 with water. During the test, the third manual valve 10 needs to be closed to prevent water from flowing out of the water injection port 9.

[0034] Furthermore, the engine is connected to the side wall of the water injection tank 8 through two auxiliary pipes 11, and a fourth manual valve 12 is provided on the auxiliary pipe 11. The water circulation of the existing engine is also provided with two outlets for exhaust. The exhaust outlet is connected to the water injection tank 8 through the two auxiliary pipes 11, so that the gas in the engine water circulation can be discharged into the water injection tank 8 together with the water in the engine through the two auxiliary pipes 11. The water discharged into the water injection tank 8 from the auxiliary pipe 11 flows into the main pipeline 1 again and returns to the entire circulation. The connection between the auxiliary pipe 11 and the water injection tank 8 can be controlled by the fourth manual valve 12.

[0035] Furthermore, a flow meter 13 is provided at the water inlet of the main pipe 1 for counting the flow at the water inlet of the main pipe 1 and for measuring the flow velocity.

[0036] Furthermore, the present embodiment also includes a water pump 14, the water inlet and outlet of the water pump 14 are both connected to the main pipeline 1, and a fifth manual valve 15 is provided on the main pipeline 1 between the water inlet and outlet of the water pump 14. The provided water pump 14 can provide power for the water circulation of the main pipeline 1. When the water pump 14 is needed, the fifth manual valve 15 is closed, and when the water pump 14 is not in use, the fifth manual valve 15 is opened.

[0037] Example 2

[0038] like Figure 2As shown, the difference between this embodiment and embodiment 1 is that the water inlet of the heater 5 is connected with the main pipeline 1 and is located between the water outlet of the engine and the water inlet of the delivery pipeline 202, the water outlet of the heater 5 is connected with the water outlet end of the delivery pipeline 202, and the water inlet end of the heater 5 is provided with a second manual valve 7; the heater 5 is used for heating, so that the heat exchanger 2 is only used to reduce the water temperature, which is convenient for rapid switching of various water temperatures and is conducive to saving test time; the heater 5 and the heat exchanger 2 are arranged in parallel, and the two share the first three-way proportional valve 3 for mixing water, which can reduce the production cost of the device; the water inlet of the engine is directly connected with the first three-way proportional valve 3, which can shorten the path of the water after the temperature is adjusted to flow to the water inlet of the engine, and reduce the water temperature change on this path, Regardless of whether the water temperature is being heated or cooled during water temperature control, more accurate water temperature control can be achieved; by connecting the heater 5 in parallel with the heat exchanger 2, the length of the main line 1 can be shortened, the change in water temperature when water flows through the main line 1 can be reduced, and the cost of the device can be reduced. The path for water to flow from the water outlet of the engine into the heater 5 and then into the engine is also shortened, so that the water temperature can be controlled more quickly; when it is necessary to heat the water, the first manual valve 4 is closed, and the water in the engine directly enters the heater 5 from the main line 1 for heating, and then is mixed with the water in the main line 1 through the first three-way proportional valve 3, and then flows directly into the engine after mixing; when it is necessary to cool the water, the second manual valve 7 is closed to prevent water from entering the heater 5, and the water temperature is controlled by the heat exchanger 2.

[0039] Further, the main line 1 located between the delivery pipeline 202 is defined as the first branch, the main line 1 located between the first branch and the water outlet of the engine is defined as the second branch, and the main line 1 located between the first branch and the water inlet of the engine is defined as the third branch;

[0040] The water inlet of the second branch is connected to the water inlet of the first branch, the water inlet of the heater 5, and the water inlet of the delivery pipeline 202 through a four-way joint. The first branch, the heater 5 and the delivery pipeline 202 are arranged in parallel, which can shorten the length of the main pipeline 1 and the water circulation path, and is more conducive to regulating the water temperature.

[0041] Furthermore, the first branch, the heater 5 and the conveying pipeline 202 are all arranged side by side in the horizontal direction, which is beneficial to the spatial layout and can reduce the space occupied by the device. The heater 5 is arranged horizontally, which can reduce the risk of dry burning of the heating wire in the heater 5.

[0042] It should be noted that although the present invention is disclosed as above by specific embodiments, the above embodiments are not intended to limit the present invention. Ordinary technicians in this field can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope defined in the claims.

Claims

1. A water temperature control device for engine bench testing, characterized in that: include: A main pipe, a water inlet of the main pipe is connected to a water outlet of the engine, and a water outlet of the main pipe is connected to a water inlet of the engine; A heat exchanger comprises a heat exchange pipeline and a delivery pipeline, wherein the water inlet and the water outlet of the delivery pipeline are both connected to the main pipeline, wherein the water outlet of the delivery pipeline is connected to the main pipeline via a first three-way proportional valve, and the first three-way proportional valve controls the opening and closing degree of its two inlets and one outlet.

2. The water temperature control device for engine bench testing according to claim 1, characterized in that: A first manual valve is provided at the water inlet end of the delivery pipeline.

3. The water temperature control device for engine bench testing according to claim 2, characterized in that: It also includes a heater, the water inlet and water outlet of the heater are both connected to the main pipeline, wherein the water outlet of the heater is connected to the main pipeline through a second three-way proportional valve, the second three-way proportional valve controls the opening and closing degree of its two inlets and one outlet, the second three-way proportional valve is located between the water outlet of the main pipeline and the first three-way proportional valve, the connection point between the water inlet of the heater and the main pipeline is located between the first three-way proportional valve and the second three-way proportional valve, and a second manual valve is provided at the water inlet end of the heater.

4. The water temperature control device for engine bench testing according to claim 2, characterized in that: It also includes a heater, the water inlet of the heater is connected to the main pipeline and is located between the water outlet of the engine and the water inlet of the delivery pipeline. The water outlet of the heater is connected to the water outlet end of the delivery pipeline, and a second manual valve is provided at the water inlet end of the heater.

5. The water temperature control device for engine bench testing according to claim 4, characterized in that: The main line between the delivery pipelines is defined as the first branch line, the main line between the first branch line and the water outlet of the engine is defined as the second branch line, and the main line between the first branch line and the water inlet of the engine is defined as the third branch line; The water inlet of the second branch is connected to the first branch, the water inlet of the heater, and the water inlet of the delivery pipeline through a four-way joint.

6. The water temperature control device for engine bench testing according to claim 1, characterized in that: It also includes a water injection tank connected to the main pipe, the water injection tank is located above the main pipe, a water injection port is provided on the top of the water injection tank, and a third manual valve is provided at the water injection port.

7. The water temperature control device for engine bench testing according to claim 6, characterized in that: The engine is communicated with the side wall of the water injection tank through two auxiliary pipes, and a fourth manual valve is arranged on the auxiliary pipes.

8. The water temperature control device for engine bench testing according to claim 1, characterized in that: It also includes a water pump, wherein the water inlet and the water outlet of the water pump are both connected to the main pipe, and a fifth manual valve is provided on the main pipe between the water inlet and the water outlet of the water pump.

9. The water temperature control device for engine bench testing according to claim 1, characterized in that: It also includes a cold water tank, and the two ends of the heat exchange pipeline are respectively connected to the water inlet and the water outlet of the cold water tank.

10. The water temperature control device for engine bench testing according to claim 9, characterized in that: A third three-way proportional valve is provided at the water outlet of the cold water tank, the inlet of the third three-way proportional valve is connected to the water outlet of the cold water tank, and the other two outlets are respectively connected to the heat exchange pipeline and the water inlet of the cold water tank. The third three-way proportional valve controls the opening and closing degree of its one inlet and two outlets.

Images