VCU performance test system and method for marine diesel engine

Abstract

The invention provides a VCU performance test system of a marine diesel engine and a method thereof, which can perform effective performance test on a valve control unit of the marine diesel engine so as to ensure normal operation and emission control of the diesel engine. The VCU performance test system of the marine diesel engine comprises a base and a valve control unit arranged on the base, wherein the valve control unit is provided with an oil inlet, an oil suction port and an oil outlet; the device further comprises a state testing unit, an oil suction testing unit and a non-return testing unit, the oil suction testing unit is connected with the oil suction port, the oil outlet is connected with the non-return testing unit after being connected with an oil cylinder, and the state testing unit is connected with the oil inlet.

Description

Technical Field

[0001] The invention relates to the technical field of marine accessories detection, in particular to a VCU performance testing system and method for a marine diesel engine. Background Art

[0002] Marine diesel engines have high thermal efficiency, good economy, easy starting, and great adaptability to various types of ships. They were quickly used as ship propulsion power after they came out. Among them, VCU (Vehicle Control Unit) is an important component of marine diesel engines. It is mainly used to automatically control the opening and closing of the exhaust valve. However, before the VCU leaves the factory, its performance needs to be tested (such as testing the oil suction and check functions of the VCU's suction valve, and testing the VCU's performance in opening and closing the exhaust valve) to ensure the normal operation and emission control of the diesel engine. Summary of the invention

[0003] In view of the above problems, the present invention provides a VCU performance test system and method for a marine diesel engine, which can perform effective performance testing on the valve control unit of the marine diesel engine, thereby ensuring the normal operation and emission control of the diesel engine.

[0004] The present invention adopts the following technical scheme: a VCU performance test system for a marine diesel engine, which includes a base and a valve control unit installed on the base, wherein the valve control unit has an oil inlet, an oil suction port, and an oil outlet; it also includes a state test unit, an oil suction test unit, and a non-return test unit, wherein the oil suction test unit is connected to the oil suction port, the oil outlet is connected to the non-return test unit after being connected to an oil cylinder, and the state test unit is connected to the oil inlet.

[0005] Further, the state test unit includes a first solenoid valve, a first pressure regulating valve, a first speed regulating valve, and a second speed regulating valve, wherein the P port of the first solenoid valve is connected to the oil supply port, the T port of the first solenoid valve is connected to the oil tank, the first pressure regulating valve is connected between the P port and the T port of the first solenoid valve, the A port of the first solenoid valve is connected to the oil inlet after being connected to the first speed regulating valve; the B port of the first solenoid valve is connected to the oil tank after being connected to the second speed regulating valve;

[0006] Further, the oil suction test unit includes a second solenoid valve, a second pressure regulating valve, a third speed regulating valve, and a fourth speed regulating valve, wherein the P port of the second solenoid valve is connected to the oil supply port, the T port of the second solenoid valve is connected to the oil tank, the second pressure regulating valve is connected between the P port and the T port of the second solenoid valve, the A port of the second solenoid valve is connected to the oil suction port after being connected to the third speed regulating valve; the B port of the second solenoid valve is connected to the oil tank after being connected to the fourth speed regulating valve;

[0007] Further, the check test unit includes a third solenoid valve, a third pressure regulating valve, a fifth speed regulating valve, and a sixth speed regulating valve, wherein the P port of the third solenoid valve is connected to the oil supply port, the T port of the third solenoid valve is connected to the oil tank, the third pressure regulating valve is connected between the P port and the T port of the third solenoid valve, the A port of the third solenoid valve is connected to the oil cylinder after being connected to the fifth speed regulating valve; the B port of the third solenoid valve is connected to the oil tank after being connected to the sixth speed regulating valve;

[0008] Furthermore, a first one-way throttle valve is connected to the pipeline between the first speed regulating valve and the oil inlet, a second one-way throttle valve is connected to the pipeline between the third speed regulating valve and the oil suction port, and a third one-way throttle valve is connected to the pipeline between the fifth speed regulating valve and the oil cylinder;

[0009] A VCU performance testing method for a marine diesel engine comprises the following steps:

[0010] S1, the electromagnetic coil V21 of the second electromagnetic valve is energized, the electromagnetic coil V32 of the third electromagnetic valve is energized, the hydraulic oil enters the oil suction port after passing through the third speed regulating valve, and it is judged whether the piston rod of the oil cylinder is extended outward. If it is extended outward, the oil suction performance of the valve control unit is good;

[0011] S2, the electromagnetic coil V31 of the third electromagnetic valve is energized, and the hydraulic oil enters the oil cylinder after passing through the fifth speed regulating valve, and determines whether the piston rod of the oil cylinder can be retracted to the bottom. If the piston rod is not retracted to the bottom, the non-return performance of the valve control unit is good;

[0012] S3, the electromagnetic coil V32 of the third electromagnetic valve is energized, the electromagnetic coil V11 of the first electromagnetic valve is energized, the hydraulic oil enters the oil inlet after passing through the first speed regulating valve, and it is judged whether the piston rod of the oil cylinder is extended. If it is extended, the ejection performance of the valve control unit is good;

[0013] S4, the electromagnetic coil V31 of the third electromagnetic valve is energized, the electromagnetic coil V11 of the first electromagnetic valve is energized, and the hydraulic oil enters the oil inlet and the oil cylinder respectively after passing through the first speed regulating valve and the fifth speed regulating valve, and it is judged whether the piston rod of the oil cylinder is retracted. If it is retracted, the retraction performance of the valve control unit is good;

[0014] S5. Repeat steps S3 and S4 for at least 30 times. If there is no abnormality, it is determined that the overall performance of the valve control unit is good.

[0015] The beneficial effect of the present invention is that, by providing a status test unit, an oil suction test unit and a non-return test unit correspondingly connected to the oil inlet, the oil suction port and the oil outlet, the valve control unit of the marine diesel engine can be effectively tested for performance through the status test unit, the oil suction test unit and the non-return test unit, thereby ensuring the normal operation and emission control of the diesel engine, and having good economic use value. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the connection structure of the present invention. DETAILED DESCRIPTION

[0017] like Figure 1 As shown, a VCU performance test system of a marine diesel engine of the present invention comprises a base 1 and a valve control unit 2 mounted on the base 1, the valve control unit 2 having an oil inlet 3, an oil suction port 4, and an oil outlet 5; it also comprises a state test unit 6, an oil suction test unit 7, and a non-return test unit 8, the oil suction test unit 7 is connected to the oil suction port 4, the oil outlet 5 is connected to the non-return test unit 8 after being connected to the oil cylinder 9, and the state test unit 6 is connected to the oil inlet 3; wherein, the setting of the oil cylinder 9 is equivalent to a simulated exhaust valve, and the action performance of the exhaust valve can be simulated and tested through the action of the oil cylinder 9; the non-spring chamber of the oil cylinder 9 is connected to the oil outlet 5, and the spring chamber of the oil cylinder 9 is connected to the fifth speed regulating valve 22.

[0018] The state test unit 6 includes a first solenoid valve 10, a first pressure regulating valve 11, a first speed regulating valve 12, and a second speed regulating valve 13. The P port of the first solenoid valve 10 is connected to the oil supply port 14 of the hydraulic station, the T port of the first solenoid valve 10 is connected to the oil tank 15, the first pressure regulating valve 11 is connected between the P port and the T port of the first solenoid valve 10, the A port of the first solenoid valve 10 is connected to the oil inlet 3 after being connected to the first speed regulating valve 12; the B port of the first solenoid valve 10 is connected to the oil tank 15 after being connected to the second speed regulating valve 13.

[0019] The oil suction test unit 7 includes a second solenoid valve 16, a second pressure regulating valve 17, a third speed regulating valve 18, and a fourth speed regulating valve 19. The P port of the second solenoid valve 16 is connected to the oil supply port 14, the T port of the second solenoid valve 16 is connected to the oil tank 15, the second pressure regulating valve 17 is connected between the P port and the T port of the second solenoid valve 16, the A port of the second solenoid valve 16 is connected to the oil suction port 4 after being connected to the third speed regulating valve 18; the B port of the second solenoid valve 16 is connected to the oil tank 15 after being connected to the fourth speed regulating valve 19.

[0020] The check test unit 8 includes a third solenoid valve 20, a third pressure regulating valve 21, a fifth speed regulating valve 22, and a sixth speed regulating valve 23. The P port of the third solenoid valve 20 is connected to the oil supply port 14, the T port of the third solenoid valve 20 is connected to the oil tank 15, the third pressure regulating valve 21 is connected between the P port and the T port of the third solenoid valve 20, the A port of the third solenoid valve 20 is connected to the oil cylinder 9 after being connected to the fifth speed regulating valve 22; the B port of the third solenoid valve 20 is connected to the oil tank 15 after being connected to the sixth speed regulating valve 23.

[0021] A first one-way throttle valve 24 is connected to the pipeline between the first speed regulating valve 12 and the oil inlet 3, a second one-way throttle valve 25 is connected to the pipeline between the third speed regulating valve 18 and the oil suction port 4, and a third one-way throttle valve 26 is connected to the pipeline between the fifth speed regulating valve 22 and the oil cylinder 9.

[0022] A VCU performance testing method for a marine diesel engine comprises the following steps:

[0023] S1, the electromagnetic coil V21 of the second electromagnetic valve 16 is energized, and the electromagnetic coil V32 of the third electromagnetic valve 20 is energized, and the hydraulic oil enters the oil suction port 4 after passing through the third speed regulating valve 18, that is, the oil suction port 4 is supplied with oil, and it is judged whether the piston rod of the oil cylinder 9 is extended outward. If it is extended outward, it means that the oil suction valve (not shown in the figure) in the valve control unit 2 has good oil suction performance;

[0024] S2, the electromagnetic coil V31 of the third electromagnetic valve 20 is energized, and the hydraulic oil enters the oil cylinder 9 after passing through the fifth speed regulating valve 22, that is, the oil is supplied to the spring chamber of the oil cylinder 9 to determine whether the piston rod of the oil cylinder 9 can be retracted to the bottom. If the piston rod is not retracted to the bottom, it means that the non-return performance of the oil suction valve in the valve control unit 2 is good; if the non-return performance of the oil suction valve in the valve control unit 2 is not good, then the piston rod of the oil cylinder 9 will continue to retract until it reaches the bottom of the oil cylinder;

[0025] S3, the electromagnetic coil V32 of the third electromagnetic valve 20 is energized, and the electromagnetic coil V11 of the first electromagnetic valve 10 is energized, and the hydraulic oil enters the oil inlet 3 after passing through the first speed regulating valve 12, and it is judged whether the piston rod of the oil cylinder 9 is extended. If it is extended, it means that the ejection performance of the valve control unit 2 is good, and the ejection performance is equivalent to the function of opening the exhaust valve, that is, it can be said that the performance of the valve control unit 2 in opening the exhaust valve is good;

[0026] S4, the electromagnetic coil V31 of the third electromagnetic valve 20 is energized, and the electromagnetic coil V11 of the first electromagnetic valve 10 is energized, and the hydraulic oil enters the oil inlet 3 and the oil cylinder 9 respectively after passing through the first speed regulating valve 12 and the fifth speed regulating valve 22, and judges whether the piston rod of the oil cylinder 9 is retracted. If it is retracted, it means that the retraction performance of the valve control unit 2 is good; the retraction performance is equivalent to the function of closing the exhaust valve, that is, it can be said that the performance of the valve control unit 2 in closing the exhaust valve is good;

[0027] S5. Repeat steps S3 and S4 for 30 times. If there is no abnormality, it is determined that the overall performance of the valve control unit 2 is good.

[0028] The valve control unit 2 in the present invention is an existing component on the marine diesel engine. After passing through the state test unit 6, the oil suction test unit 7, and the check test unit 8, the performance of the valve control unit 2 (i.e., testing the oil suction and check functions of the VCU's oil suction valve, and testing the VCU's performance of opening and closing the exhaust valve) can be effectively tested, thereby ensuring the normal operation and emission control of the diesel engine.

[0029] In the figure, V11 and V12 respectively represent the left and right electromagnetic coils of the first electromagnetic valve 10; V21 and V22 respectively represent the left and right electromagnetic coils of the second electromagnetic valve 16; V31 and V32 respectively represent the left and right electromagnetic coils of the third electromagnetic valve 20.

[0030] The first solenoid valve 10 , the second solenoid valve 16 , and the third solenoid valve 20 are all three-position four-way solenoid valves.

[0031] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0032] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A VCU performance test system for a marine diesel engine, comprising a base and a valve control unit mounted on the base, wherein the valve control unit has an oil inlet, an oil suction port, and an oil outlet; characterized in that: It also includes a state test unit, an oil suction test unit, and a non-return test unit. The oil suction test unit is connected to the oil suction port, the oil outlet is connected to the non-return test unit after being connected to the oil cylinder, and the state test unit is connected to the oil inlet.

2. A VCU performance test system for a marine diesel engine according to claim 1, characterized in that: The state testing unit includes a first solenoid valve, a first pressure regulating valve, a first speed regulating valve, and a second speed regulating valve. The P port of the first solenoid valve is connected to the oil supply port, the T port of the first solenoid valve is connected to the oil tank, the first pressure regulating valve is connected between the P port and the T port of the first solenoid valve, the A port of the first solenoid valve is connected to the oil inlet after being connected to the first speed regulating valve; the B port of the first solenoid valve is connected to the oil tank after being connected to the second speed regulating valve.

3. A VCU performance test system for a marine diesel engine according to claim 2, characterized in that: The oil suction test unit includes a second solenoid valve, a second pressure regulating valve, a third speed regulating valve, and a fourth speed regulating valve. The P port of the second solenoid valve is connected to the oil supply port, the T port of the second solenoid valve is connected to the oil tank, the second pressure regulating valve is connected between the P port and the T port of the second solenoid valve, the A port of the second solenoid valve is connected to the oil suction port after being connected to the third speed regulating valve; the B port of the second solenoid valve is connected to the oil tank after being connected to the fourth speed regulating valve.

4. A VCU performance test system for a marine diesel engine according to claim 3, characterized in that: The check test unit includes a third solenoid valve, a third pressure regulating valve, a fifth speed regulating valve, and a sixth speed regulating valve. The P port of the third solenoid valve is connected to the oil supply port, the T port of the third solenoid valve is connected to the oil tank, the third pressure regulating valve is connected between the P port and the T port of the third solenoid valve, the A port of the third solenoid valve is connected to the oil cylinder after being connected to the fifth speed regulating valve; the B port of the third solenoid valve is connected to the oil tank after being connected to the sixth speed regulating valve.

5. A VCU performance test system for a marine diesel engine according to claim 4, characterized in that: A first one-way throttle valve is connected to the pipeline between the first speed regulating valve and the oil inlet, a second one-way throttle valve is connected to the pipeline between the third speed regulating valve and the oil suction port, and a third one-way throttle valve is connected to the pipeline between the fifth speed regulating valve and the oil cylinder.

6. A VCU performance test method for a marine diesel engine, characterized in that: A VCU performance test system for a marine diesel engine as claimed in any one of claims 1 to 5 is used; the method comprises the following steps: S1, the electromagnetic coil V21 of the second electromagnetic valve is energized, the electromagnetic coil V32 of the third electromagnetic valve is energized, the hydraulic oil enters the oil suction port after passing through the third speed regulating valve, and it is judged whether the piston rod of the oil cylinder is extended outward. If it is extended outward, the oil suction performance of the valve control unit is good; S2, the electromagnetic coil V31 of the third electromagnetic valve is energized, and the hydraulic oil enters the oil cylinder after passing through the fifth speed regulating valve, and determines whether the piston rod of the oil cylinder can be retracted to the bottom. If the piston rod is not retracted to the bottom, the non-return performance of the valve control unit is good; S3, the electromagnetic coil V32 of the third electromagnetic valve is energized, the electromagnetic coil V11 of the first electromagnetic valve is energized, the hydraulic oil enters the oil inlet after passing through the first speed regulating valve, and it is judged whether the piston rod of the oil cylinder is extended. If it is extended, the ejection performance of the valve control unit is good; S4, the electromagnetic coil V31 of the third electromagnetic valve is energized, the electromagnetic coil V11 of the first electromagnetic valve is energized, and the hydraulic oil enters the oil inlet and the oil cylinder respectively after passing through the first speed regulating valve and the fifth speed regulating valve, and it is judged whether the piston rod of the oil cylinder is retracted. If it is retracted, the retraction performance of the valve control unit is good; S5. Repeat steps S3 and S4 for at least 30 times. If there is no abnormality, it is determined that the overall performance of the valve control unit is good.

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