Water supply temperature control system for intercooler of engine

Abstract

The invention discloses a water supply temperature control system for an intercooler of an engine, which belongs to the technical field of engines and comprises a heat exchanger, a liquid supplementing tank and a diesel engine. The cold medium side and the heat medium side of the heat exchanger are connected with the outer circulation loop and the inner circulation loop respectively. The inner circulation loop comprises an auxiliary water pump and an intercooler which are connected through an inner circulation pipeline; the liquid supplementing box is connected with the internal circulation pipeline through a breather pipe and a liquid supplementing pipe; an adjusting valve is arranged on the circulating water return pipe; the adjusting valve is an electric adjusting valve, and the opening degree can be adjusted; the liquid supplementing box is connected with the intercooler water return pipe through a breather pipe and connected with the auxiliary water pump water inlet pipe through a liquid supplementing pipe. Micro-negative-pressure water supply can be conducted on the engine auxiliary water pump, the water inlet temperature can be adjusted, then the intercooler cools the air inlet temperature before intercooling of the engine, and the requirement for the air inlet temperature after intercooling of the engine is met.

Description

Technical Field

[0001] The invention relates to the technical field of engines, in particular to a water supply temperature control system for an engine intercooler. Background Art

[0002] The engine needs to undergo factory testing after assembly. Before the test, the water, oil, gas, electricity and other pipelines are connected to the corresponding test equipment and instruments to control the engine operating conditions and monitor whether the test data meets the factory requirements. For engines with their own auxiliary water pumps and intercoolers, it is necessary to simulate the actual ship loading conditions. Because the auxiliary water pump of the engine on board directly draws seawater, the auxiliary water pump needs to be supplied with slightly negative pressure water in the laboratory, and the inlet water temperature needs to be maintained within a certain range to provide a temperature-controllable circulating water circuit for the intercooler.

[0003] The existing test laboratory water supply condition is that the cooling water tower outside the test room introduces water into the test room through pipes (divided into external circulation water inlet and external circulation water return), and then directly connects the external circulation water inlet to the test room to use the intercooler to cool the engine's intake temperature, and the inlet water temperature can be controlled by the intercooler temperature control.

[0004] The existing laboratory water supply pressure is positive pressure, while the engine auxiliary water pump needs a slightly negative pressure to supply water, which cannot meet the water inlet pressure requirement; the intercooler temperature control can only match the laboratory intercooler, and cannot match the engine's intercooler, so it cannot be directly applied to the engine.

[0005] In view of the above problems, the present invention designs an engine intercooler water supply temperature control system, which supplies water at a slight negative pressure to the engine auxiliary water pump and controls the water inlet temperature, so that the intercooler can cool the air intake temperature before the engine intercooling and meet the intake temperature requirement after the engine intercooling. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide an engine intercooler water supply temperature control system, which can supply water to the engine auxiliary water pump with a slight negative pressure and adjust the water inlet temperature, thereby realizing the intercooler cooling the air intake temperature before the engine intercooling and meeting the air intake temperature requirement after the engine intercooling.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is: An engine intercooler water supply temperature control system comprises a heat exchanger, a liquid replenishing tank and a diesel engine; the cold and hot medium sides of the heat exchanger are respectively connected to an external circulation loop and an internal circulation loop; The internal circulation loop includes an auxiliary water pump and an intercooler connected by an internal circulation pipeline; The liquid replenishing tank is connected with the internal circulation pipeline through a ventilation pipe and a liquid replenishing pipe.

[0008] A further improvement of the technical solution of the present invention is that the external circulation loop includes an external circulation water inlet pipe connected to the refrigerant inlet of the heat exchanger and an external circulation water return pipe connected to the refrigerant outlet of the heat exchanger.

[0009] A further improvement of the technical solution of the present invention is that a regulating valve is arranged on the external circulation water return pipe.

[0010] A further improvement of the technical solution of the present invention is that the regulating valve is an electric regulating valve, and the opening degree is adjustable.

[0011] A further improvement of the technical solution of the present invention is that the internal circulation pipeline includes an auxiliary water pump inlet pipe connected to the heat medium outlet of the heat exchanger, and an intercooler return pipe connected to the heat medium inlet of the heat exchanger; the auxiliary water pump inlet pipe is connected to the auxiliary water pump, and the intercooler return pipe is connected to the intercooler.

[0012] A further improvement of the technical solution of the present invention is that a second temperature sensor attachment seat is arranged on the water inlet pipe of the auxiliary water pump, and a temperature sensor is arranged on the second temperature sensor attachment seat.

[0013] A further improvement of the technical solution of the present invention is that a first temperature sensor attachment seat is arranged on the intercooler return water pipe, and a temperature sensor is arranged on the first temperature sensor attachment seat.

[0014] A further improvement of the technical solution of the present invention is that the liquid replenishing tank is connected to the intercooler return pipe through a ventilation pipe, and the liquid replenishing tank is connected to the auxiliary water pump inlet pipe through a liquid replenishing pipe.

[0015] A further improvement of the technical solution of the present invention is that a liquid level gauge and an air vent pipe are provided on the liquid replenishing tank.

[0016] A further improvement of the technical solution of the present invention is that a deflation valve is provided at the end of the deflation pipe.

[0017] Due to the adoption of the above technical solution, the technical progress achieved by the present invention is: 1. The present invention designs an engine intercooler water supply temperature control system. By setting an external circulation loop and an internal circulation loop, a micro-negative pressure water supply is realized for the auxiliary water pump in the internal circulation loop, fully simulating the working environment and completing the experimental test.

[0018] 2. The present invention provides an electric regulating valve with adjustable valve opening on the external circulation loop, and cooperates with the heat exchanger to realize cooling of the intake temperature before engine intercooling by the intercooler, thereby meeting the intake temperature requirement after engine intercooling.

[0019] 3. The present invention arranges a vent pipe and a bleed pipe on the replenishment tank. Since the diesel engine will cause the temperature of the internal circulation water circuit to be high and generate bubbles during operation, in order to prevent excessive pressure in the pipeline, the intercooler return pipe and the replenishment tank are connected through the vent pipe, and a bleed port is arranged above the replenishment tank to discharge the bubbles in the internal circulation water circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the engine intercooler water supply temperature control system of the present invention; Among them, 1. external circulation return pipe, 2. regulating valve, 3. heat exchanger, 4. liquid level gauge, 5. fluid filling tank, 6. vent pipe, 7. ventilation pipe, 8. intercooler return pipe, 9. first temperature sensor attachment seat, 10. second temperature sensor attachment seat, 11 auxiliary water pump inlet pipe, 12. fluid filling pipe, 13. heat exchanger bracket, 14. external circulation inlet pipe, 15. intercooler, 16. auxiliary water pump, 17. diesel engine. DETAILED DESCRIPTION

[0021] The present invention is further described in detail below with reference to the accompanying drawings and embodiments: In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" ... etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0022] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", etc. may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "several" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0023] like Figure 1As shown, an engine intercooler water supply temperature control system includes a heat exchanger 3, a diesel engine 17, a liquid replenishing tank 5 and an intercooler 15; the two sides of the heat exchanger 3 are respectively connected to an external circulation pipeline and an internal circulation pipeline; the external circulation pipeline includes an external circulation water inlet pipe 14 connected to the refrigerant inlet of the heat exchanger 3 and an external circulation water return pipe 1 connected to the refrigerant outlet of the heat exchanger 3; a regulating valve 2 is arranged on the external circulation water return pipe 1, and the regulating valve 2 is an electric regulating valve with adjustable opening; the internal circulation pipeline includes an auxiliary water pump inlet pipe 11 connected to the heat medium outlet of the heat exchanger 3, and an intercooler return pipe 8 connected to the heat medium inlet of the heat exchanger 3; the auxiliary water pump inlet pipe 11 is connected to the auxiliary Auxiliary water pump 16, a second temperature sensor seat 10 is arranged on the auxiliary water pump inlet pipe 11, and a temperature sensor for detecting the auxiliary water pump inlet temperature is arranged on the second temperature sensor seat 10; the intercooler return pipe 8 is connected to the intercooler 15, and a first temperature sensor seat 9 is arranged on the intercooler return pipe 8, and a temperature sensor for detecting the intercooler return water temperature is arranged on the first temperature sensor seat 9; the intercooler return pipe 8 is also provided with a ventilation pipe 7 connected to the liquid replenishing tank 5, and the liquid replenishing tank 5 is connected to the auxiliary water pump inlet pipe 11 through the liquid replenishing pipe 12; the liquid replenishing tank 5 is also provided with a liquid level gauge 4 and a vent pipe 6; a vent valve is arranged at the end of the vent pipe 6. Example

[0024] A regulating valve 2 with adjustable valve opening is installed on the external circulation return pipe 1, which is connected to the heat exchanger 3 through a flange. The liquid level meter 4, the liquid replenishing tank 5 and the venting pipe 6 are an integrated structure, which is fixed above the heat exchanger 3. The vent pipe 7 connects the liquid replenishing tank 5 and the intercooler return pipe 8. One end of the intercooler return pipe 8 is connected to the heat exchanger 3, and the other end is connected to the intercooler outlet through a hose clamp. The intercooler return water temperature sensor seat 9 is fixed on the intercooler return pipe 8, and the auxiliary second temperature sensor seat 10 is fixed on the auxiliary water pump inlet pipe 11. The auxiliary water pump inlet pipe 11 is connected to the heat exchanger 3 at one end, and the other end is connected to the water inlet of the auxiliary water pump 16 through a hose and a clamp. The liquid replenishing pipe 12 is connected to the liquid replenishing tank 5 and the auxiliary water pump inlet pipe 11 respectively. The heat exchanger bracket 13 is placed on the ground, the heat exchanger 3 is fixed on the top, and the external circulation inlet pipe 14 is connected to the heat exchange 3 through a flange.

[0025] Working principle: First, water is added to the replenishing tank 5 so that the water enters the auxiliary water pump of the diesel engine and the intercooler through the replenishing pipe 12 to form an internal circulation water circuit (intercooler return pipe 8, heat exchanger 3, auxiliary water pump inlet pipe 11). Since the diesel engine 17 will cause the temperature of the internal circulation water circuit to be high and generate bubbles during operation, in order to prevent excessive pressure in the pipeline, the intercooler return pipe 8 and the replenishing tank 5 are connected through the ventilation pipe 7, and an air vent 6 is provided above the replenishing tank to discharge the bubbles in the internal circulation water circuit; since the return water temperature of the intercooler is relatively high, the return water of the intercooler is cooled by heat exchange through the external circulation water circuit (external circulation inlet pipe 14, heat exchanger 3, external circulation return pipe 1), so that the auxiliary water pump inlet temperature meets the requirements, and an electric regulating valve 2 with an adjustable opening is provided at the external circulation return port to control the water temperature.

Claims

1. An engine intercooler water supply temperature control system, characterized in that: It comprises a heat exchanger (3), a liquid replenishing tank (5) and a diesel engine (17); the cold medium and the hot medium on both sides of the heat exchanger (3) are respectively connected to an external circulation loop and an internal circulation loop; The internal circulation loop comprises an auxiliary water pump (16) and an intercooler (15) connected via an internal circulation pipeline; The liquid replenishment tank (5) is connected to the internal circulation pipeline via a ventilation pipe (7) and a liquid replenishment pipe (12).

2. The engine intercooler water supply temperature control system according to claim 1, characterized in that: The external circulation loop comprises an external circulation water inlet pipe (14) connected to the refrigerant inlet of the heat exchanger (3) and an external circulation water return pipe (1) connected to the refrigerant outlet of the heat exchanger (3).

3. The engine intercooler water supply temperature control system according to claim 2, characterized in that: A regulating valve (2) is provided on the external circulation water return pipe (1).

4. The engine intercooler water supply temperature control system according to claim 3, characterized in that: The regulating valve (2) is an electric regulating valve, and its opening degree is adjustable.

5. The engine intercooler water supply temperature control system according to claim 1, characterized in that: The internal circulation pipeline comprises an auxiliary water pump water inlet pipe (11) connected to a heat medium outlet of the heat exchanger (3), and an intercooler water return pipe (8) connected to a heat medium inlet of the heat exchanger (3); the auxiliary water pump water inlet pipe (11) is connected to an auxiliary water pump (16), and the intercooler water return pipe (8) is connected to the intercooler (15).

6. The engine intercooler water supply temperature control system according to claim 1, characterized in that: A second temperature sensor attachment seat (10) is arranged on the auxiliary water pump water inlet pipe (11), and a temperature sensor is arranged on the second temperature sensor attachment seat (10).

7. The engine intercooler water supply temperature control system according to claim 1, characterized in that: A first temperature sensor attachment seat (9) is arranged on the intercooler water return pipe (8), and a temperature sensor is arranged on the first temperature sensor attachment seat (9).

8. The engine intercooler water supply temperature control system according to claim 1, characterized in that: The liquid replenishing tank (5) is connected to the intercooler return pipe (8) via a vent pipe (7), and the liquid replenishing tank (5) is connected to the auxiliary water pump water inlet pipe (11) via a liquid replenishing pipe (12).

9. The engine intercooler water supply temperature control system according to claim 8, characterized in that: The liquid replenishing tank (5) is provided with a liquid level meter (4) and an air release pipe (6).

10. The engine intercooler water supply temperature control system according to claim 9, characterized in that: A deflation valve is provided at the end of the deflation pipe (6).

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