A hydraulic system for detecting the sealing performance of exhaust valve actuator and fuel booster

Abstract

The present invention provides a hydraulic system for detecting the sealing performance of an exhaust valve actuator and a fuel booster, which ensures the sealing performance and reliability of the test system itself, and realizes automation and subsequent data logic analysis. It includes a one-way valve, a load relief valve, a first pilot solenoid valve, a second pilot solenoid valve, a first two-way cartridge valve, and a second two-way cartridge valve; the input end of the one-way valve is connected to the pressure oil through a pipeline, and the output end of the one-way valve is respectively connected to the first two-way cartridge valve, the second two-way cartridge valve, the inlet of the first pilot solenoid valve, and the second inlet of the second pilot solenoid valve, the outlet of the first pilot solenoid valve is connected to the first inlet of the second pilot solenoid valve, the first outlet of the second pilot solenoid valve is connected to the driving end of the first two-way cartridge valve, and the second outlet of the second pilot solenoid valve is connected to the driving end of the second two-way cartridge valve.

Description

Technical Field

[0001] The invention relates to the technical field of sealing detection, in particular to a hydraulic system for detecting the sealing performance of an exhaust valve actuator and a fuel booster. Background Art

[0002] The exhaust valve actuator and the fuel booster are two important actuator components in the HCU device, a key component of a marine diesel engine. Their sealing performance is crucial. The existing test systems test the two components independently, which requires the setting of two sets of power sources, making the test cost high. In order to reduce the cost, the test needs to be adjusted to one power source. However, the existing technology causes leakage when switching the power source, so the sealing test fails. Therefore, it is urgent to find a hydraulic system that can perform sealing tests with a single power source. Summary of the invention

[0003] In view of the above problems, the present invention provides a hydraulic system for detecting the sealing performance of an exhaust valve actuator and a fuel booster, which ensures the sealing performance and reliability of the test system itself and realizes automation and subsequent data logic analysis.

[0004] A hydraulic system for detecting the sealing performance of an exhaust valve actuator and a fuel booster, characterized in that it comprises:

[0005] One-way valve;

[0006] Unloading relief valve;

[0007] First pilot solenoid valve;

[0008] Second pilot solenoid valve;

[0009] First two-way cartridge valve;

[0010] Second two-way cartridge valve;

[0011] The input end of the one-way valve is connected to the pressure oil through a pipeline, and the output end of the one-way valve is respectively connected to the first two-way cartridge valve, the second two-way cartridge valve, the inlet of the first pilot solenoid valve, and the second inlet of the second pilot solenoid valve, the outlet of the first pilot solenoid valve is connected to the first inlet of the second pilot solenoid valve, the first outlet of the second pilot solenoid valve is connected to the driving end of the first two-way cartridge valve, and the second outlet of the second pilot solenoid valve is connected to the driving end of the second two-way cartridge valve;

[0012] The outlet end of the first two-way cartridge valve is connected to the fuel booster oil inlet distribution block through a first oil supply pipeline, the first oil supply pipeline is connected to a bypass first energy storage pipeline and a first safety valve pipeline, the first energy storage pipeline is provided with a first accumulator, the first safety valve pipeline is provided with a first safety valve, one end of the first safety valve pipeline is connected to the end of the first energy storage pipeline through a first hydraulically controlled one-way valve, and the other end is connected to the first return pipeline;

[0013] The first oil supply pipeline is provided with a corresponding pressure sensor and a threaded cartridge throttle valve, the first safety valve pipeline is provided with a corresponding pressure sensor and a threaded cartridge throttle valve, and the first accumulator pipeline is provided with a corresponding pressure sensor and a threaded cartridge throttle valve;

[0014] The outlet end of the second two-way cartridge valve is connected to the exhaust valve actuator oil inlet distribution block through a second oil supply pipeline, the second oil supply pipeline is connected to a bypass second energy storage pipeline and a second safety valve pipeline, a second accumulator is provided on the second energy storage pipeline, a second safety valve is provided on the second safety valve pipeline, and the end of the second safety valve pipeline is connected to the end of the second energy storage pipeline through a second hydraulically controlled one-way valve, and the other end is connected to the second return pipeline;

[0015] The second oil supply pipeline is provided with a corresponding pressure sensor and a threaded cartridge throttle valve, the second safety valve pipeline is provided with a corresponding pressure sensor and a threaded cartridge throttle valve, and the second accumulator pipeline is provided with a corresponding pressure sensor and a threaded cartridge throttle valve.

[0016] It is further characterized by:

[0017] The unloading relief valve automatically unloads the system oil inlet pressure;

[0018] The first hydraulically controlled one-way valve and the second hydraulically controlled one-way valve provide a path of control oil to enable the accumulator to have automatic unloading;

[0019] The starting end of the first oil supply pipeline is provided with a first pressure sensor A and a first threaded cartridge throttle valve A in sequence, the pipeline of the first safety valve pipeline located before the first safety valve is provided with a first threaded cartridge throttle valve B and a first pressure sensor B in sequence, the pipeline connecting the first hydraulically controlled one-way valve to the first accumulator is provided with a first pressure sensor C, a first threaded cartridge throttle valve C, and a first pressure sensor D in sequence, the starting end of the first accumulator pipeline is provided with a first threaded cartridge throttle valve D, and the rear pipeline of the bypass section of the first oil supply pipeline is provided with a first pressure sensor E, a first threaded cartridge throttle valve E, and a first pressure sensor F in sequence;

[0020] The starting end of the second oil supply pipeline is sequentially provided with a second pressure sensor A and a second threaded cartridge throttle valve A; the pipeline of the second safety valve pipeline located before the second safety valve is sequentially provided with a second threaded cartridge throttle valve B and a second pressure sensor B; the pipeline connecting the second hydraulically controlled one-way valve to the second accumulator is sequentially arranged with a second pressure sensor C, a second threaded cartridge throttle valve C, and a second pressure sensor D; the starting end of the second accumulator pipeline is provided with a second threaded cartridge throttle valve D; the rear pipeline of the bypass section of the second oil supply pipeline is sequentially provided with a second pressure sensor E, a second threaded cartridge throttle valve E, and a second pressure sensor F.

[0021] After adopting the structure of the present invention, when the first pilot solenoid valve is energized and opened, and when the second pilot solenoid valve is energized and the first inlet is connected to the first outlet, the first two-way cartridge valve is opened and the second two-way cartridge valve is closed. At this time, the sealing performance of the fuel booster can be tested. Under normal circumstances, all the threaded cartridge throttle valves are fully opened, and the electronic control system automatically determines whether the throttle valve is opened through the data of the corresponding pressure sensor. At this time, the pressure oil source charges the accumulator through the first two-way cartridge valve. When the pressure reaches the setting value of the unloading relief valve, the P port is unloaded. In order to prevent the first safety valve from leaking, the threaded cartridge throttle valve at the corresponding position is closed, the first pilot solenoid valve and the second pilot solenoid valve are de-energized at the same time, and the first two-way cartridge valve and the second two-way cartridge valve are both closed. Since the first two-way cartridge valve and the first hydraulically controlled one-way valve are both seat valves, the test system itself has very good sealing performance. The sealing performance of the fuel booster is judged by the data of the pressure sensor of the first fuel supply pipeline closest to the fuel booster oil inlet distribution block changing over time. If the fuel booster sealing performance is fine after the test, the test of the fuel booster is completed. If the fuel booster performance is not good after the test, for further verification, you can consider manually selecting the corresponding threaded cartridge throttle valve to open or close. If the fuel booster performance is still not good after the test, it can be judged that there is a problem with the sealing performance of the fuel booster; when the first pilot solenoid valve loses power, the second pilot solenoid valve is energized and the second inlet is connected to the second outlet, the first two-way cartridge valve is closed and the second two-way cartridge valve is opened. The sealing performance of the exhaust valve actuator can be measured by the same method; the sealing performance and reliability of the test system itself are guaranteed, and automation and subsequent data logic analysis are realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic block diagram of the main view structure of the present invention;

[0023] The names corresponding to the serial numbers in the figure are as follows:

[0024] One-way valve 10, unloading relief valve 20, first pilot solenoid valve 30, second pilot solenoid valve 40, first two-way cartridge valve 50, second two-way cartridge valve 60, first oil supply pipeline 70, fuel booster oil inlet distribution block 80, first energy storage pipeline 90, first safety valve pipeline 100, first accumulator 110, first safety valve 120, second oil supply pipeline 130, exhaust valve actuator oil inlet distribution block 140, second energy storage pipeline 150, second safety valve pipeline 160, second accumulator 170, second safety valve 180, second hydraulically controlled one-way valve 190, first return pipeline 200, second return pipeline 210;

[0025] The first pressure sensor A1-1, the first pressure sensor B1-2, the first pressure sensor C1-3, the first pressure sensor D1-4, the first pressure sensor E1-5, the first pressure sensor F1-6, the first threaded plug-in throttle valve A2-1, the first threaded plug-in throttle valve B2-2, the first threaded plug-in throttle valve C2-3, the first threaded plug-in throttle valve D2-4, the first threaded plug-in throttle valve E2-5, the second pressure sensor A3-1, the second pressure sensor B3-2, the second pressure sensor C3-3, the second pressure sensor D3-4, the second pressure sensor E3-5, the second pressure sensor F3-6, the second threaded plug-in throttle valve A4-1, the second threaded plug-in throttle valve B4-2, the second threaded plug-in throttle valve C4-3, the second threaded plug-in throttle valve D4-4, the second threaded plug-in throttle valve E4-5, the third pressure sensor 5, and the fourth pressure sensor 6. DETAILED DESCRIPTION

[0026] A hydraulic system for testing the sealing performance of exhaust valve actuators and fuel boosters, see Figure 1 , which includes a one-way valve 10, a load relief valve 20, a first pilot solenoid valve 30, a second pilot solenoid valve 40, a first two-way cartridge valve 50, and a second two-way cartridge valve 60;

[0027] The input end of the one-way valve 10 is connected to the pressure oil through a pipeline, and the output end of the one-way valve 10 is respectively connected to the first two-way cartridge valve 50, the second two-way cartridge valve 60, the inlet of the first pilot solenoid valve 30, and the second inlet of the second pilot solenoid valve 40, the outlet of the first pilot solenoid valve 30 is connected to the first inlet of the second pilot solenoid valve 40, the first outlet of the second pilot solenoid valve 40 is connected to the driving end of the first two-way cartridge valve 50, and the second outlet of the second pilot solenoid valve 40 is connected to the driving end of the second two-way cartridge valve 60;

[0028] The outlet end of the first two-way cartridge valve 50 is connected to the fuel booster oil inlet distribution block 80 through the first oil supply pipeline 70. The first oil supply pipeline 70 is connected to the bypass first energy storage pipeline 90 and the first safety valve pipeline 100. The first energy storage pipeline 90 is provided with a first accumulator 110. The first safety valve pipeline 100 is provided with a first safety valve 120. One end of the first safety valve pipeline 100 is connected to the end of the first energy storage pipeline 90 through the first hydraulically controlled one-way valve 220, and the other end is connected to the first return pipeline 200.

[0029] The first oil supply pipeline 70 is provided with a corresponding pressure sensor and a threaded cartridge throttle valve, the first safety valve pipeline 100 is provided with a corresponding pressure sensor and a threaded cartridge throttle valve, and the first accumulator pipeline 90 is provided with a corresponding pressure sensor and a threaded cartridge throttle valve;

[0030] The outlet end of the second two-way cartridge valve 60 is connected to the exhaust valve actuator oil inlet distribution block 140 through the second oil supply pipeline 130, and the second oil supply pipeline 130 is connected to the bypass second energy storage pipeline 150 and the second safety valve pipeline 160. The second energy storage pipeline 150 is provided with a second accumulator 170, and the second safety valve pipeline 160 is provided with a second safety valve 180. The end of the second safety valve pipeline 160 is connected to the end of the second energy storage pipeline 150 through the second hydraulically controlled one-way valve 190, and the other end is connected to the second return pipeline 210;

[0031] The second oil supply pipeline 130 is provided with a corresponding pressure sensor and a threaded cartridge throttle valve, the second safety valve pipeline 160 is provided with a corresponding pressure sensor and a threaded cartridge throttle valve, and the second accumulator pipeline 150 is provided with a corresponding pressure sensor and a threaded cartridge throttle valve.

[0032] The unloading relief valve 20 automatically unloads the system oil inlet pressure; in specific implementation, the role of the unloading relief valve 20 is to test the sealing performance. When the pressure behind the one-way valve 10 reaches 20 MPa, for example, the system pressure oil port can be automatically unloaded through the unloading relief valve. When the pressure behind the one-way valve 10 drops to 18 MPa, it can be reloaded. Due to the existence of the 2 MPa pressure difference, the unloading relief valve 20 can save energy while avoiding frequent pressurization of the system.

[0033] The first hydraulically controlled one-way valve 220 and the second hydraulically controlled one-way valve 190 provide a path of control oil to enable the corresponding accumulator to have automatic unloading;

[0034] The starting end of the first oil supply pipeline 70 is provided with a first pressure sensor A1-1 and a first threaded plug-in throttle valve A2-1 in sequence, the pipeline of the first safety valve pipeline 100 located before the first safety valve 120 is provided with a first threaded plug-in throttle valve B2-2 and a first pressure sensor B1-2 in sequence, the pipeline of the first hydraulically controlled one-way valve 220 connected to the first accumulator 110 is provided with a first pressure sensor C1-3, a first threaded plug-in throttle valve C2-3, and a first pressure sensor D1-4 in sequence, the starting end of the first accumulator pipeline 90 is provided with a first threaded plug-in throttle valve D2-4, and the rear pipeline of the bypass section of the first oil supply pipeline 70 is provided with a first pressure sensor E1-5, a first threaded plug-in throttle valve E2-5, and a first pressure sensor F1-6 in sequence;

[0035] The starting end of the second oil supply pipeline 130 is sequentially provided with a second pressure sensor A3-1 and a second threaded plug-in throttle valve A4-1, the pipeline of the second safety valve pipeline 160 located before the second safety valve 180 is sequentially provided with a second threaded plug-in throttle valve B4-2 and a second pressure sensor B3-2, the pipeline connecting the second hydraulically controlled one-way valve 190 to the second accumulator 170 is sequentially arranged with a second pressure sensor C3-3, a second threaded plug-in throttle valve C4-3, and a second pressure sensor D3-4, the starting end of the second accumulator pipeline 150 is provided with a second threaded plug-in throttle valve D4-4, and the rear pipeline of the bypass section of the second oil supply pipeline 130 is sequentially provided with a second pressure sensor E3-5, a second threaded plug-in throttle valve E4-5, and a second pressure sensor F3-6.

[0036] In specific implementation, the first outlet of the second pilot solenoid valve 40 is provided with a third pressure sensor 5 , and the second outlet of the second pilot solenoid valve 40 is provided with a fourth pressure sensor 6 , to ensure that data is complete and reliable during detection.

[0037] Its working principle is as follows: the first pilot solenoid valve is powered on and opened, the second pilot solenoid valve is powered on and the first inlet is connected to the first outlet, the first two-way cartridge valve is opened, and the second two-way cartridge valve is closed. At this time, the fuel booster can be tested for sealing performance. Under normal circumstances, all threaded cartridge throttle valves are fully opened, and the electronic control system automatically determines whether the throttle valve is opened through the data of the corresponding pressure sensor. At this time, the pressure oil source charges the accumulator through the first two-way cartridge valve. When the pressure reaches the setting value of the unloading relief valve, the P port is unloaded. In order to prevent the first safety valve from leaking, the threaded cartridge throttle valve at the corresponding position is closed, the first pilot solenoid valve and the second pilot solenoid valve are de-energized at the same time, and the first two-way cartridge valve and the second two-way cartridge valve are both closed. Since the first two-way cartridge valve and the first hydraulically controlled one-way valve are both seat valves, the test system itself has very good sealing performance. The sealing performance of the fuel booster is judged by the data of the pressure sensor closest to the fuel booster inlet distribution block of the first fuel supply pipeline changing over time. If the fuel booster sealing performance is fine after the test, the test of the fuel booster is completed. If the fuel booster performance is not good after the test, for further verification, you can consider manually selecting the corresponding threaded cartridge throttle valve to open or close. If the fuel booster performance is still not good after the test, it can be judged that there is a problem with the sealing performance of the fuel booster; when the first pilot solenoid valve loses power, the second pilot solenoid valve is energized and the second inlet is connected to the second outlet, the first two-way cartridge valve is closed and the second two-way cartridge valve is opened. The sealing performance of the exhaust valve actuator can be measured by the same method; the sealing performance and reliability of the test system itself are guaranteed, and automation and subsequent data logic analysis are realized.

[0038] 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.

[0039] 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 hydraulic system for detecting the sealing performance of exhaust valve actuators and fuel boosters, It is characterized in that It includes: One-way valve; Unloading relief valve; First pilot solenoid valve; Second pilot solenoid valve; First two-way cartridge valve; Second two-way cartridge valve; The input end of the one-way valve is connected to the pressure oil through a pipeline, and the output end of the one-way valve is respectively connected to the first two-way cartridge valve, the second two-way cartridge valve, the inlet of the first pilot solenoid valve, and the second inlet of the second pilot solenoid valve, the outlet of the first pilot solenoid valve is connected to the first inlet of the second pilot solenoid valve, the first outlet of the second pilot solenoid valve is connected to the driving end of the first two-way cartridge valve, and the second outlet of the second pilot solenoid valve is connected to the driving end of the second two-way cartridge valve; The outlet end of the first two-way cartridge valve is connected to the fuel booster oil inlet distribution block through a first oil supply pipeline, the first oil supply pipeline is connected to a bypass first energy storage pipeline and a first safety valve pipeline, the first energy storage pipeline is provided with a first accumulator, the first safety valve pipeline is provided with a first safety valve, one end of the first safety valve pipeline is connected to the end of the first energy storage pipeline through a first hydraulically controlled one-way valve, and the other end is connected to the first return pipeline; The first oil supply pipeline is provided with a corresponding pressure sensor and a threaded cartridge throttle valve, the first safety valve pipeline is provided with a corresponding pressure sensor and a threaded cartridge throttle valve, and the first energy storage pipeline is provided with a corresponding pressure sensor and a threaded cartridge throttle valve; The outlet end of the second two-way cartridge valve is connected to the exhaust valve actuator oil inlet distribution block through a second oil supply pipeline, the second oil supply pipeline is connected to a bypass second energy storage pipeline and a second safety valve pipeline, a second accumulator is provided on the second energy storage pipeline, a second safety valve is provided on the second safety valve pipeline, and the end of the second safety valve pipeline is connected to the end of the second energy storage pipeline through a second hydraulically controlled one-way valve, and the other end is connected to the second return pipeline; The second oil supply pipeline is provided with a corresponding pressure sensor and a threaded cartridge throttle valve, the second safety valve pipeline is provided with a corresponding pressure sensor and a threaded cartridge throttle valve, and the second energy storage pipeline is provided with a corresponding pressure sensor and a threaded cartridge throttle valve; The starting end of the first oil supply pipeline is provided with a first pressure sensor A and a first threaded plug-in throttle valve A in sequence; The starting end of the second oil supply pipeline is provided with a second pressure sensor A and a second threaded throttle valve A in sequence.

2. A hydraulic system for detecting the sealing performance of an exhaust valve actuator and a fuel booster as claimed in claim 1, Features: The pipeline of the first safety valve pipeline located before the first safety valve is sequentially provided with a first threaded cartridge throttle valve B and a first pressure sensor B; the pipeline connecting the first hydraulically controlled one-way valve to the first accumulator is sequentially provided with a first pressure sensor C, a first threaded cartridge throttle valve C, and a first pressure sensor D; the starting end of the first energy storage pipeline is provided with a first threaded cartridge throttle valve D; the rear pipeline of the bypass section of the first oil supply pipeline is sequentially provided with a first pressure sensor E, a first threaded cartridge throttle valve E, and a first pressure sensor F.

3. A hydraulic system for detecting the sealing performance of an exhaust valve actuator and a fuel booster as claimed in claim 1, Features: The pipeline of the second safety valve pipeline located before the second safety valve is sequentially provided with a second threaded cartridge throttle valve B and a second pressure sensor B; the pipeline connecting the second hydraulically controlled one-way valve to the second accumulator is sequentially arranged with a second pressure sensor C, a second threaded cartridge throttle valve C, and a second pressure sensor D; the starting end of the second energy storage pipeline is provided with a second threaded cartridge throttle valve D; the rear pipeline of the bypass section of the second oil supply pipeline is sequentially provided with a second pressure sensor E, a second threaded cartridge throttle valve E, and a second pressure sensor F.

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