Pilot-level test tool and test system

Abstract

The utility model relates to a pilot-level testing tool which comprises a fixing block, the fixing block is provided with a torque motor installation position, the fixing block is provided with a first oil way connector at the torque motor installation position, the first oil way connector is used for being communicated with a torque motor oil return opening, and the two sides of the fixing block are provided with an oil inlet and an oil return opening. The oil inlet and the oil return port are both communicated with the first oil way connector, the fixing block is provided with a first control cavity and a second control cavity in the direction perpendicular to the connecting line of the oil inlet and the oil return port, and the first control cavity and the second control cavity are communicated with the first oil way connector. A first oil way connector is arranged on a fixing block, an oil inlet, an oil return opening, a first control cavity and a second control cavity which are communicated with the first oil way connector are formed in the periphery of the fixing block, and the consistency of output characteristics of the torque motor is guaranteed by controlling the flow of the first control cavity and the second control cavity and the linearity of a pressure output curve; the technical problem that whether the torque motor has a problem or not is difficult to judge in the debugging process in the prior art is solved.

Description

Technical Field

[0001] The present application relates to the field of electro-hydraulic servo valve design, and in particular to a pilot-stage test fixture and a test system. Background Art

[0002] At present, the hydraulically controlled servo valve is mainly an electro-hydraulic servo valve. After receiving the electrical analog signal, it outputs the modulated flow and pressure accordingly, converting the low-power electrical input signal into a high-power hydraulic energy output. In the electro-hydraulic servo system, it connects the electrical part with the hydraulic part to realize the conversion of electro-hydraulic signals and hydraulic amplification.

[0003] In related technologies, the torque motor serves as a mechanical converter in the electro-hydraulic servo valve, which can convert the input electrical control signal into torque. The working performance of the torque motor directly affects the overall indicators of the electro-hydraulic servo valve system. If the torque motor is directly placed on the electro-hydraulic servo valve for whole-machine debugging, it is difficult to determine whether the problem is with the torque motor. If the debugging is unsuccessful, it needs to be repeatedly disassembled and reassembled, resulting in multiple damages to the seal and unsatisfactory debugging results.

[0004] Therefore, it is necessary to design a new pilot-level test fixture to overcome the above problems. Utility Model Content

[0005] The present application provides a pilot-level test tooling and test system, which can solve the technical problem in related technologies that the torque motor is directly placed on the electro-hydraulic servo valve for whole-machine debugging, making it difficult to determine whether there is a problem with the torque motor. When debugging is unsuccessful, it needs to be repeatedly disassembled and reassembled, causing multiple damage to the seal and unsatisfactory debugging results.

[0006] In the first aspect, an embodiment of the present application provides a pilot-stage test fixture, which includes a fixed block, the fixed block is provided with a torque motor mounting position, the fixed block is provided with a first oil circuit interface at the torque motor mounting position, the first oil circuit interface is used to communicate with the oil return port of the torque motor, an oil inlet is provided on one side of the fixed block, the oil inlet is used to communicate with the oil inlet of the test device, an oil return port is provided on the other side of the fixed block, the oil inlet and the oil return port are both connected to the first oil circuit interface, the fixed block is provided with a first control chamber and a second control chamber along a direction perpendicular to the connection line of the oil inlet and the oil return port, the first control chamber and the second control chamber are respectively connected to the first oil circuit interface.

[0007] In combination with the first aspect, in one embodiment, a second oil circuit interface, a third oil circuit interface, a fourth oil circuit interface and a fifth oil circuit interface are provided in the lower end surface of the fixed block, the second oil circuit interface is connected to the oil inlet, the third oil circuit interface is connected to the oil return port, the fourth oil circuit interface is connected to the first control chamber, and the fifth oil circuit interface is connected to the second control chamber.

[0008] In combination with the first aspect, in one embodiment, the first oil circuit interface is located at the center of the upper end surface of the fixed block, and the oil inlet, the oil return port, the first control chamber and the second control chamber are evenly distributed around the first oil circuit interface.

[0009] In combination with the first aspect, in one embodiment, the first control chamber and the second control chamber are symmetrically arranged along the axis of the first oil circuit interface.

[0010] In combination with the first aspect, in one embodiment, the first control chamber and the second control chamber are respectively connected to a pressure sensor.

[0011] In combination with the first aspect, in one embodiment, the oil return port is connected to a flow meter and a conversion valve.

[0012] In combination with the first aspect, in one embodiment, the torque motor mounting position is provided with a plurality of torque motor mounting interfaces, and the plurality of torque motor mounting interfaces are evenly distributed around the first oil circuit interface, and the fixed block is used to be bolted to the torque motor through the plurality of torque motor mounting interfaces.

[0013] In combination with the first aspect, in one embodiment, tooling installation interfaces are provided at the four corners of the fixing block.

[0014] In a second aspect, an embodiment of the present application provides a pilot stage test system, which includes a test device and a torque motor, wherein the above-mentioned pilot stage test tooling is installed between the test device and the torque motor.

[0015] In combination with the second aspect, in one embodiment, the pilot stage test system further includes a measurement and control device, which is used to output a current-flow curve and a current-pressure curve based on the flow signal of the oil return port and the pressure difference signal between the first control chamber and the second control chamber.

[0016] The beneficial effects of the technical solutions provided in the embodiments of the present application include:

[0017] By installing a fixed block on the torque motor, a first oil circuit interface connected to the oil return port of the torque motor is set on the fixed block, an oil inlet and an oil return port are set on both sides of the fixed block, and a first control chamber and a second control chamber are set on the fixed block along a direction perpendicular to the connecting line of the oil inlet and the oil return port. The oil inlet, the oil return port, the first control chamber and the second control chamber are respectively connected to the first oil circuit interface. By controlling the linearity of the flow and pressure output curves of the first control chamber and the second control chamber, the consistency of the output characteristics of the torque motor is ensured, and the torque motor that meets the requirements is screened in advance. This solves the technical problem in the related technology that the torque motor is directly placed on the electro-hydraulic servo valve for whole-machine debugging, and it is difficult to determine whether there is a problem with the torque motor. When debugging is unsuccessful, it needs to be repeatedly disassembled and reassembled, resulting in multiple damages to the seal and unsatisfactory debugging results. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0019] Figure 1 A schematic structural diagram of a pilot-level test fixture provided in an embodiment of the present application;

[0020] Figure 2 A front view of a pilot-level test fixture provided in an embodiment of the present application;

[0021] Figure 3 for Figure 2 Cross-sectional view of AA;

[0022] Figure 4 for Figure 2 Cross-sectional view of the BB.

[0023] In the figure: 1. First oil circuit interface; 101. Main interface; 102. Secondary interface; 2. Oil inlet; 3. Oil return port; 4. First control chamber; 5. Second control chamber; 6. Second oil circuit interface; 7. Third oil circuit interface; 8. Fourth oil circuit interface; 9. Fifth oil circuit interface; 10. Torque motor installation interface; 11. Tooling installation interface. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 this application.

[0025] The embodiments of the present application provide a pilot-level test tooling and test system, which can solve the technical problem that when a torque motor is directly placed on an electro-hydraulic servo valve for whole-machine debugging, it is difficult to determine whether there is a problem with the torque motor. When debugging is unsuccessful, it needs to be repeatedly disassembled and reassembled, resulting in multiple damages to the seal and unsatisfactory debugging results.

[0026] See also Figure 1 As shown, an embodiment of the present application provides a pilot-stage test fixture, which includes a fixed block, the fixed block is provided with a torque motor mounting position, the fixed block is provided with a first oil circuit interface 1 at the torque motor mounting position, the first oil circuit interface 1 is used to communicate with the oil return port of the torque motor, an oil inlet 2 is provided on one side of the fixed block, the oil inlet 2 is used to communicate with the oil inlet of the test device, an oil return port 3 is provided on the other side of the fixed block, the oil inlet 2 and the oil return port 3 are both connected with the first oil circuit interface 1, the fixed block is provided with a first control chamber 4 and a second control chamber 5 along a direction perpendicular to the connection line of the oil inlet 2 and the oil return port 3, the first control chamber 4 and the second control chamber 5 are respectively connected with the first oil circuit interface 1.

[0027] In this embodiment, the fixed block can be set to a rectangular parallelepiped or other shapes according to design requirements. The first oil circuit interface 1 includes a main interface 101 and three auxiliary interfaces 102. The main interface 101 is connected to the oil return port 3, and the three auxiliary interfaces 102 are respectively connected to the oil inlet 2, the first control chamber 4 and the second control chamber 5. The first oil circuit interface 1, the oil inlet 2 and the oil return port 3 are all independent interfaces. The first control chamber 4 and the second control chamber 5 are independently controlled. The fixed block is assembled and connected to the torque motor. By controlling the linearity of the flow and pressure output curves of the first control chamber 4 and the second control chamber 5, the consistency of the output characteristics of the torque motor can be guaranteed.

[0028] This embodiment installs the fixed block on the torque motor, arranges the first oil circuit interface 1 connected with the oil return port of the torque motor on the fixed block, arranges the oil inlet 2 and the oil return port 3 on both sides of the fixed block, and arranges the first control chamber 4 and the second control chamber 5 on the fixed block along a direction perpendicular to the connection line between the oil inlet 2 and the oil return port 3. The oil inlet 2, the oil return port 3, the first control chamber 4 and the second control chamber 5 are respectively connected with the first oil circuit interface 1. By controlling the linearity of the flow rate and pressure output curve of the first control chamber 4 and the second control chamber 5, the consistency of the output characteristics of the torque motor is ensured, and the torque motor that meets the requirements is screened in advance, which solves the technical problem in the related art that the torque motor is directly placed on the electro-hydraulic servo valve for whole-machine debugging, and it is difficult to determine whether there is a problem with the torque motor. When debugging is unsuccessful, it needs to be repeatedly disassembled and reassembled, resulting in multiple damages to the seal and unsatisfactory debugging results.

[0029] Further, see Figure 1-4 As shown, in some embodiments, a second oil circuit interface 6, a third oil circuit interface 7, a fourth oil circuit interface 8 and a fifth oil circuit interface 9 are provided in the lower end surface of the fixed block, the second oil circuit interface 6 is connected to the oil inlet 2, the third oil circuit interface 7 is connected to the oil return port 3, the fourth oil circuit interface 8 is connected to the first control chamber 4, and the fifth oil circuit interface 9 is connected to the second control chamber 5.

[0030] In this embodiment, the second oil circuit interface 6, the third oil circuit interface 7, the fourth oil circuit interface 8 and the fourth oil circuit interface 8 are respectively opposite to the interfaces of the test device, the oil inlet 2 is connected to the second oil circuit interface 6, the oil return port 3 is connected to the third oil circuit interface 7, the first control chamber 4 is connected to the fourth oil circuit interface 8, and the second control chamber 5 is connected to the fifth oil circuit interface 9, so that the torque motor can adjust the flow and pressure of the first control chamber 4 and the second control chamber 5, and obtain the current-flow curve and the current-pressure curve.

[0031] Further, see Figure 1 and Figure 2 As shown, in some embodiments, the first oil circuit interface 1 is located at the center of the upper end surface of the fixed block, and the oil inlet 2, the oil return port 3, the first control chamber 4 and the second control chamber 5 are evenly distributed around the first oil circuit interface 1.

[0032] In this embodiment, the oil inlet 2, the oil return port 3, the first control chamber 4 and the second control chamber 5 are evenly distributed around the first oil circuit interface 1, so that the torque motor can quickly regulate the flow and pressure of the fixed block.

[0033] Further, see Figure 2 and Figure 4 As shown, in some embodiments, the first control chamber 4 and the second control chamber 5 are symmetrically arranged along the axis of the first oil circuit interface 1. In this embodiment, the first control chamber 4 and the second control chamber 5 are symmetrically arranged along the axis of the first oil circuit interface 1, so that the internal structure of the pilot stage test fixture remains consistent along the axis of the first oil circuit interface 1, effectively reducing the impact of the internal structure on pressure deviation. When there is no signal input from the torque motor, the pressure in the first control chamber 4 and the pressure in the second control chamber 5 are equal. When a control current is input to the torque motor, the fixed block can generate an output torque and drive the deflector plate to move, thereby generating a pressure differential between the first control chamber 4 and the second control chamber 5.

[0034] Further, see Figure 1 As shown, in some embodiments, the first control chamber 4 and the second control chamber 5 are each connected to a pressure sensor. In this embodiment, the pressure sensor receives a pressure differential signal between the first control chamber 4 and the second control chamber 5 to obtain the current-pressure curve. By controlling the output pressure of the torque motor within a certain range and ensuring the linearity of the current-pressure curve, the output pressure of the torque motor can be guaranteed to be consistent.

[0035] Further, see Figure 1 As shown, in some embodiments, the oil return port 3 is connected to a flow meter and a conversion valve. In this embodiment, the flow meter can measure the flow rate of the oil circuit, and the conversion valve can convert the flow rate into an oil circuit flow signal. The flow signal from the oil return port 3 is received by the flow meter and the conversion valve to obtain the current-flow curve. The output flow rate of the torque motor can be controlled within a certain range, and the linearity of the current-flow curve can be ensured, thereby ensuring the consistency of the output flow rate of the torque motor.

[0036] Further, see Figure 1 and Figure 2 As shown, in some embodiments, the torque motor mounting position is provided with a plurality of torque motor mounting interfaces 10, and the plurality of torque motor mounting interfaces 10 are evenly distributed around the first oil circuit interface 1, and the fixing block is used to be bolted to the torque motor through the plurality of torque motor mounting interfaces 10.

[0037] In this embodiment, the multiple torque motor mounting interfaces 10 can be set as four torque motor mounting interfaces 10, and the four torque motor mounting interfaces 10 are evenly distributed around the first oil circuit interface 1. The fixing block is bolted to the torque motor through the mounting screws located at the four torque motor mounting interfaces 10, so that the fixing block is stably connected to the torque motor.

[0038] Further, see Figure 1 and Figure 2 As shown, in some embodiments, tooling installation interfaces 11 are provided at the four corners of the fixing block.

[0039] In this embodiment, the fixing block is connected to the test device through the four tooling installation interfaces 11 , so that the test device can be communicated with the interior of the torque motor through the fixing block.

[0040] An embodiment of the present application provides a pilot stage test system, which includes a test device and a torque motor, wherein the pilot stage test fixture mentioned above is installed between the test device and the torque motor.

[0041] In this embodiment, the test device can provide test pressure for the oil circuit and ensure the stability of the oil pressure in the oil circuit. The test device and the torque motor can form a whole through the fixed block, and the output characteristics of the torque motor can be obtained by adjusting the fixed block.

[0042] Further, see Figure 1 As shown, in some embodiments, the pilot stage test system further includes a measurement and control device, which is used to output a current-flow curve and a current-pressure curve based on the flow signal of the oil return port 3 and the pressure difference signal between the first control chamber 4 and the second control chamber 5.

[0043] In this embodiment, the measurement and control device receives the flow signal of the return oil port 3, and outputs the current-flow curve according to the flow signal, controls the output flow of the torque motor within a certain range, and ensures the linearity of the current-flow curve, thereby ensuring the consistency of the output flow of the torque motor. The measurement and control device receives the pressure difference signal between the first control chamber 4 and the second control chamber 5, and outputs the current-pressure curve according to the pressure difference signal, controls the output pressure of the torque motor within a certain range, and ensures the linearity of the current-pressure curve, thereby ensuring the consistency of the output pressure of the torque motor. By debugging the pilot stage of the torque motor, the consistency of the flow and pressure input to the slide valve stage is ensured, thereby improving the consistency of the valve parameters. By screening the torque motor in advance, the debugging efficiency of the electro-hydraulic servo valve is improved.

[0044] In the description of this application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0045] It should be noted that, in this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0046] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A pilot-level test tool, characterized in that: It includes: A fixed block is provided with a torque motor mounting position, and a first oil circuit interface (1) is provided at the torque motor mounting position. The first oil circuit interface (1) is used to communicate with the oil return port of the torque motor. An oil inlet (2) is provided on one side of the fixed block, and the oil inlet (2) is used to communicate with the oil inlet of the test device. An oil return port (3) is provided on the other side of the fixed block, and the oil inlet (2) and the oil return port (3) are both communicated with the first oil circuit interface (1). The fixed block is provided with a first control chamber (4) and a second control chamber (5) along a direction perpendicular to the connecting line of the oil inlet (2) and the oil return port (3), and the first control chamber (4) and the second control chamber (5) are respectively communicated with the first oil circuit interface (1).

2. The pilot test fixture according to claim 1, characterized in that: A second oil circuit interface (6), a third oil circuit interface (7), a fourth oil circuit interface (8) and a fifth oil circuit interface (9) are provided in the lower end surface of the fixed block. The second oil circuit interface (6) is communicated with the oil inlet (2), the third oil circuit interface (7) is communicated with the oil return port (3), the fourth oil circuit interface (8) is communicated with the first control chamber (4), and the fifth oil circuit interface (9) is communicated with the second control chamber (5).

3. The pilot test fixture according to claim 1, wherein: The first oil circuit interface (1) is located at the center of the upper end surface of the fixed block, and the oil inlet (2), the oil return port (3), the first control chamber (4) and the second control chamber (5) are evenly distributed around the first oil circuit interface (1).

4. The pilot test fixture according to claim 1, wherein: The first control chamber (4) and the second control chamber (5) are symmetrically arranged along the axis of the first oil circuit interface (1).

5. The pilot test fixture according to claim 1, wherein: The first control chamber (4) and the second control chamber (5) are respectively connected to pressure sensors.

6. The pilot test fixture according to claim 1, wherein: The oil return port (3) is connected to a flow meter and a conversion valve.

7. The pilot test fixture according to claim 1, wherein: The torque motor mounting position is provided with a plurality of torque motor mounting interfaces (10), and the plurality of torque motor mounting interfaces (10) are evenly distributed around the first oil circuit interface (1), and the fixing block is used for bolting with the torque motor through the plurality of torque motor mounting interfaces (10).

8. The pilot test fixture according to claim 1, wherein: The four corners of the fixing block are provided with tooling installation interfaces (11).

9. A pilot-level test system, characterized in that: It comprises a test device and a torque motor, and the pilot-stage test fixture as claimed in claim 1 is installed between the test device and the torque motor.

10. The pilot stage test system according to claim 9, wherein the pilot stage test fixture is provided with an oil inlet (2), an oil return port (3), a first control chamber (4) and a second control chamber (5), and is characterized in that: The pilot stage test system further comprises a measurement and control device, which is used to output a current-flow curve and a current-pressure curve based on a flow signal of the oil return port (3) and a pressure difference signal between the first control chamber (4) and the second control chamber (5).

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