Fiva valve pressure testing apparatus

Abstract

The utility model discloses a kind of FIVA valve pressure test equipment, comprising: oil supply path, the main oil supply port of oil supply path connection oil tank and FIVA valve;Pumping unit, the pumping unit is configured on the oil supply path so that oil liquid pressure passes through the oil supply path and goes up;First oil return path, the oil return port of first oil return path connection FIVA valve and the oil tank realizes oil return, first oil return path and the oil supply path constitute loop;Second oil return path, the exhaust valve oil port and fuel pump oil port of second oil return path connection FIVA valve and the oil tank realizes oil return, and solenoid valve with independent control on-off is configured in second oil return path. By setting independent oil supply path, first oil return path and second oil return path with independent control solenoid valve, the working state of FIVA valve can be accurately simulated, and combined pressure stabilizing unit is used, to ensure that pressure environment is stable and reliable.

Description

Technical Field

[0001] This utility model relates to the field of manufacturing fuel injection control valves for marine diesel engines, and in particular to a FIVA valve pressure testing device. Background Technology

[0002] On the new ME diesel engine, the FIVA valve replaces the cam action in the existing MC engine, achieving precise control of fuel injection and exhaust valve opening. The FIVA valve is a hydraulic servo component, requiring high standards in materials, precision, and clearance during design and manufacturing; its spool clearance is extremely small (typically ≤6μm). Because the FIVA valve operates at high frequency under high pressure, new installations typically require a break-in period and subsequent repair and debugging. This process necessitates specialized pressure equipment to verify the FIVA valve's condition. Previously, due to the lack of domestically available equipment for this task, the FIVA valve had to be sent to overseas manufacturers for repair and inspection. Utility Model Content

[0003] In order to overcome the above-mentioned defects of the prior art, the purpose of this utility model is to provide a FIVA valve pressure testing device to achieve the goal of domestic substitution for FIVA valve repair and testing.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A FIVA valve pressure testing device, characterized in that it comprises: The oil supply line connects the oil tank to the main oil supply port of the FIVA valve. A pumping unit is configured on the oil supply line to allow pressurized oil to flow upward through the oil supply line; The first return oil circuit connects the return oil port of the FIVA valve to the oil tank to achieve oil return, and the first return oil circuit and the oil supply circuit form a loop. The second return oil circuit connects the exhaust valve port and fuel pump port of the FIVA valve to the fuel tank to achieve oil return. The second return oil circuit is equipped with an independently controllable solenoid valve.

[0005] Furthermore, a first voltage stabilizing unit is configured on the oil supply line, and the first voltage stabilizing unit is a mechanical gravity-type voltage stabilizing unit.

[0006] Furthermore, the pumping unit is equipped with a second voltage stabilizing unit, which is an overflow voltage stabilizing unit.

[0007] Furthermore, a first filter unit is provided inside the oil tank, and the oil supply line, the first oil return line, and the second oil return line are respectively located on both sides of the first filter unit.

[0008] Furthermore, a circulation unit is also provided in the oil tank to allow the oil to flow from one side of the first filter unit to the other side.

[0009] Furthermore, the circulation unit is also equipped with a second filtration unit that filters the oil flowing through it.

[0010] Furthermore, a third filter unit is provided in the first return oil path and / or the second return oil path.

[0011] Furthermore, a cooling unit is installed inside the oil tank.

[0012] Furthermore, a first solenoid valve is configured on the oil supply line.

[0013] The beneficial effects of this utility model are as follows: The FIVA valve pressure testing equipment provided by this utility model, firstly, by setting up an independent oil supply circuit, a first oil return circuit, and a second oil return circuit with an independently controlled solenoid valve, can accurately simulate various oil circuit states of the FIVA valve in actual operation (such as filling and pressure resistance tests); secondly, by adopting a combination of a mechanical gravity-type first pressure stabilizing unit and an overflow-type second pressure stabilizing unit on the pumping unit, it effectively reduces pressure fluctuations in the oil supply circuit, provides a stable and reliable pressure environment for the testing of the FIVA valve, and ensures the accuracy of the test results. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0015] Figure 1 This is the overall system logic diagram of the device of this utility model.

[0016] Figure 2 This is a system flowchart of one embodiment of the present invention. Detailed Implementation

[0017] In the description of this utility model, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. The above description is for the purpose of simplifying the description of this utility model and does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0018] Exemplary embodiments of this application will now be described with reference to the accompanying drawings. However, it should be understood that this application can be presented in many different ways and is not limited to the embodiments described below. It should also be understood that the embodiments disclosed herein can be combined in various ways to provide further additional embodiments. Throughout the drawings, the same reference numerals denote the same or functionally identical elements.

[0019] Figure 1 This demonstration shows the basic system structure of this pressure equipment, mainly including an oil tank 30 that supplies hydraulic oil to the system, and an oil supply line 1 and a return line 2 that form a loop between the FIVA valves 6. One end of the exhaust valve oil line 4a and the fuel pump oil line 4b are connected to the Cva and Cfi return ports of the FIVA valve 6, respectively, and their other ends converge at the return line 2 to return oil to the oil tank 30. Return lines 3a and 3b are connected to the Tfi and Tva return ports of the FIVA valve 6, respectively. Since the FIVA valve 6 is in the neutral position, the fuel booster drive cylinder and the exhaust valve drive cylinder are connected to the return lines, i.e., Cfi and Tfi, and Cva and Tva are interconnected. Therefore, supplying oil to the FIVA valve 6 through the oil supply line 1 allows the FIVA valve 6 to be filled with hydraulic oil. To simulate the actual working conditions of the FIVA valve, a second solenoid valve 102 and a third solenoid valve 103 are added to the exhaust valve oil circuit 4a and the fuel pump oil circuit 4b. The pressure conditions of the circuit are simulated by controlling the opening and closing of the oil circuit through the locking solenoid valve.

[0020] Furthermore, the pressure of the hydraulic oil supplied by the oil supply line 1 should be stable during the pressure test. Although the pumping unit 401 can be a variable frequency electromagnetic motor to meet the above requirements, considering that hydraulic oil has a certain damping property, a first pressure stabilizing unit 503 is also added to the oil supply line 1 to reduce oil pressure fluctuations within the oil supply line 1. Preferably, the first pressure stabilizing unit 503 is a gravity accumulator, which accumulates energy when pressure fluctuations are large, especially when the pressure rises sharply; and provides pressure compensation when the pressure is low, especially when the equipment has just started.

[0021] Reference Figure 2 The demonstrated module logic shows that the second pressure stabilizing unit 501 is combined with the pumping unit 401 to further stabilize the oil delivery pressure. The second pressure stabilizing unit 501 is an overflow-type pressure stabilizing unit. When the oil pressure is too high, it diverts the oil and returns it to the oil tank 30 through pipeline 1a to stabilize the pressure. Both the first pressure stabilizing unit 503 and the second pressure stabilizing unit 501 are jointly controlled by the pressure control module 500 and the pump module 400. The pressure control module 500 is also connected to the pressure detector 502 on the oil supply line 1 to obtain implementation data.

[0022] In some embodiments, the first pressure regulating unit 503 has an additional venting path controlled by a drain valve 503a, which is preferably connected to the return oil main 2.

[0023] The on / off state of oil supply circuit 1 is controlled by the first solenoid valve 101. The first solenoid valve 101, the second solenoid valve 102, the third solenoid valve 103, and the pilot valve of the FIVA valve are all jointly controlled by the control module 100. When the equipment is turned on, the first solenoid valve 101, the second solenoid valve 102, and the third solenoid valve 103 are opened to fill the oil. During the pressure test, the second solenoid valve 102 and the third solenoid valve 103 are closed, and the oil forms a loop between oil supply circuit 1, return circuits 3a and 3b, and oil tank 30. The pressure is regulated by the pumping unit 401.

[0024] In some implementations, a temperature monitor 201 controlled by a temperature control module 200 is also installed on the oil supply line 1 to prevent system overload.

[0025] Furthermore, since the FIVA valve 6 is a high-precision device, the oil must be kept clean during testing to prevent impurities from clogging the FIVA valve. A first filter 11 is installed inside the oil tank 30. Preferably, the connection point between the return oil main 2 and the oil tank 30 is placed on one side of the first filter 11, while the oil supply line 1 is placed on the other side of the first filter 11, so that oil filtration is achieved through negative pressure when the system equipment is working.

[0026] In some embodiments, a circulation unit 402, also controlled by the pump module 400, is added inside the oil tank 30 to circulate the oil from one side of the first filter 11 to the other side for further filtration. Furthermore, a second filter 12 can be further provided on the circulation unit 402 to filter the oil flowing through it.

[0027] In some embodiments, a third filter 13 is also provided on the return oil main 2 so that the oil is filtered before entering the oil tank 30 after use. Further, it can be divided into a first return oil line 3 and a second return oil line 4, with return oil lines 3a and 3b converging in the first return oil line 3, and the exhaust valve oil line 4a and the fuel pump oil line 4b converging in the second return oil line 4.

[0028] In some embodiments, a cooling unit 20 is provided inside the oil tank 30.

[0029] Unless otherwise specified, the singular forms “a,” “the,” and “the” used in this specification include the plural forms. The terms “comprising,” “including,” and “containing” used in this specification indicate the presence of the claimed feature, but do not exclude the presence of one or more other features.

[0030] When a component is described in the specification as being "on", "fixed" to, "connected" to, or "joined" to another component, the component may be directly located on, fixed to, connected to, joined to, or in contact with the other component, or there may be an intermediate component present.

[0031] It is understood that although the terms "first," "second," etc., may be used herein to describe different elements, these elements should not be limited by these terms. These terms are merely used to distinguish one element from another. Therefore, a first element may be referred to as a second element without departing from the teachings of this application.

Claims

1. A FIVA valve pressure testing device, characterized in that, include: The oil supply line connects the oil tank to the main oil supply port of the FIVA valve. A pumping unit is configured on the oil supply line to allow pressurized oil to flow upward through the oil supply line; The first return oil circuit connects the return oil port of the FIVA valve to the oil tank to achieve oil return, and the first return oil circuit and the oil supply circuit form a loop. The second return oil circuit connects the exhaust valve port of the FIVA valve and the fuel pump port to the fuel tank to achieve oil return. The second return oil circuit is equipped with an independently controllable solenoid valve.

2. The FIVA valve pressure testing device as described in claim 1, characterized in that, The oil supply line is equipped with a first voltage stabilizing unit, which is a mechanical gravity-type voltage stabilizing unit.

3. The FIVA valve pressure testing device as described in claim 2, characterized in that, The pumping unit is equipped with a second voltage stabilizing unit, which is an overflow voltage stabilizing unit.

4. The FIVA valve pressure testing device as described in claim 2, characterized in that, A first filter unit is provided inside the oil tank, and the oil supply line, the first oil return line, and the second oil return line are respectively located on both sides of the first filter unit.

5. The FIVA valve pressure testing device as described in claim 4, characterized in that, The oil tank is also equipped with a circulation unit that allows the oil to flow from one side of the first filter unit to the other side.

6. The FIVA valve pressure testing device as described in claim 5, characterized in that, The circulation unit is also equipped with a second filtration unit that filters the oil flowing through it.

7. The FIVA valve pressure testing device as described in claim 4, characterized in that, A third filter unit is provided in the first return oil line and / or the second return oil line.

8. A FIVA valve pressure testing device as described in any one of claims 1 to 7, characterized in that, The oil tank is equipped with a cooling unit.

9. A FIVA valve pressure testing device as described in any one of claims 1 to 7, characterized in that, A first solenoid valve is installed on the oil supply line.

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