Special device for debugging aircraft servo valve

Abstract

The invention belongs to the technical field of aviation equipment, and relates to a special device for debugging an aircraft servo valve, which comprises a pole shoe adjusting rod, a fixed shell, a pole shoe pressing sheet, a pole shoe adjusting sheet, an adjusting sheet cover plate, a pressing sheet cover plate and a current limiting adjusting rod. The device is provided with the pole shoe adjusting rod and the pole shoe pressing piece which are matched, the position of the pole shoe can be accurately adjusted, and therefore the rated flow is adjusted until the rated flow is qualified. The flow-limiting adjusting rod is of a threaded structure, the upper end of the flow-limiting adjusting rod is of a ball head structure, when the adjusting rod is screwed in, the ball head makes contact with the flow-limiting hole of the servo valve cover plate, the flow-limiting hole of the pressing plate is extruded to deform, and compared with a traditional mode that the flow-limiting hole is directly knocked to deform. And the limit flow of the servo valve can be more accurately controlled, so that the process requirement is met, and repeated work is reduced. The aircraft servo valve debugging device is a combined part, is firm in fixation and convenient to operate, and realizes maneuverability of aircraft servo valve debugging. The aircraft servo valve performance debugging method can be used for accurately achieving aircraft servo valve performance debugging, and efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of aviation equipment and relates to a special device for debugging an aircraft servo valve. Background Art

[0002] The aircraft operating system is a key system for controlling the flight attitude of the aircraft. It plays a vital role in flight navigation. The system controls the flight status of the aircraft according to the control instructions input by the pilot. Whether its function is normal directly determines whether the aircraft can fly safely. As a key component of the aircraft operating system, the electro-hydraulic servo valve product is widely used in aerospace. It is installed on the steering gear and plays the role of electro-hydraulic conversion and power amplification in the system. The electro-hydraulic servo valve components are complex and high in precision. Specifically, when the system is working, it receives the electrical signal transmitted by the electric transmission system and converts the electrical signal into a proportional signal with corresponding polarity that can control the load flow or load pressure of the electro-hydraulic servo valve, so that the system outputs a large hydraulic power to drive the corresponding actuator. It consists of several parts such as coil assembly, magnetic circuit system assembly, housing assembly, oil filter, and pressure plate. When the servo valve is working, the relative position of the feedback rod is changed according to the received current value, thereby changing the position of the valve core to control the flow output of the servo valve. It is the core power amplification component that converts electrical signals into hydraulic signals.

[0003] The components of the electro-hydraulic servo valve are complex and high-precision. During the test and debugging, the operator uses a small hammer to knock on the pole shoe and the current limiting adjustment hole of the pressure plate of the servo valve along the left and right directions of the test bench to change their relative positions, thereby adjusting the flow performance of the servo valve. According to its working principle, knocking on the pole shoe adjusts the rated flow, and knocking on the current limiting adjustment hole of the pressure plate adjusts the limit flow. At present, there is no special device in the debugging process. It depends on manual experience to knock, which is not easy to grasp the strength and inconvenient to operate. There are repetitive work, which is time-consuming and laborious. If the force is not used carefully, it is easy to damage the servo valve. There are some quality risks, and the cost of the servo valve is high, which is easy to increase the maintenance cost. Therefore, a special debugging device is urgently needed to meet the debugging needs of aircraft electro-hydraulic servo valves, so as to release manpower, improve quality, eliminate hidden dangers, and save costs.

[0004] When testing and debugging the servo valve, the servo valve must first be fixed on the test bench seat plate, and after the supply pressure is turned on, the supply pressure is adjusted to the aircraft hydraulic system working pressure, and then the wires of the two coils are connected in series. The rated flow is adjusted by using a small hammer to tap the pole shoe, and the limit flow is adjusted by tapping the steel rod that extends into the limit flow hole of the servo valve pressure plate. Because the force of each tapping is difficult to control, the operator needs to use a small hammer to repeatedly tap the pole shoe of the servo valve and the steel rod on the limit flow adjustment hole of the pressure plate in the left and right directions to adjust the performance of the servo valve to ensure that the rated flow and limit flow output by the servo valve meet the process requirements.

[0005] There are the following shortcomings: the knocking tool is a general tool, which is relatively rough and uneven in force and random when used. It often requires repeated operations, which increases the workload; when knocking on the steel rod on the pressure plate flow limiting adjustment hole, the force is difficult to control. Excessive force will make the limit flow too small, and the pressure plate needs to be disassembled and knocked in the opposite direction, which wastes time in rework; manual knocking is time-consuming, labor-intensive and inconvenient to operate, and may even easily cause harm to personnel under certain circumstances, posing certain safety issues; the knocking point is not fixed, and there is a risk of damaging the servo valve. Summary of the invention

[0006] In order to solve the above problems, the present invention provides a special device for debugging an aircraft servo valve, which is used to test and debug the performance of an aircraft servo valve, eliminate safety hazards, improve test efficiency, improve repair quality, and save repair costs.

[0007] The technical solution of the present invention is as follows:

[0008] A special device for debugging an aircraft servo valve comprises a pole shoe adjusting rod 1, a fixed housing 2, a pole shoe clamping plate 3, a pole shoe adjusting plate 4, an adjusting plate cover plate 5, a clamping plate cover plate 6 and a current limiting adjusting rod 7.

[0009] The fixed shell 2 has two symmetrically penetrating vertical grooves on its front end surface, which are used to install the device on the test bench base boss and further fasten it by bolts; the upper surface of the fixed shell 2 is provided with a groove, and the bottom of the groove is a hollow structure; the pole shoe adjustment piece 4 is an L-shaped plate, the long side of which is placed horizontally and contacts the upper surface of the groove on the upper surface of the fixed shell 2, and the end of the long side extends out of the groove; the adjustment piece cover plate 5 is fixedly installed on the groove on the upper surface of the fixed shell 2 by bolts, limiting the pole shoe adjustment piece 4 in the The pole shoe adjusting piece 4 can move forward and backward in the groove; the pole shoe clamping piece 3 is an L-shaped plate, the long side of which is placed horizontally and contacts the bottom surface of the groove on the upper surface of the fixed shell 2, the end of the long side extends out of the hollow structure, and the short side is arranged vertically downward; the clamping piece cover plate 6 is fixedly installed below the bottom surface of the groove on the upper surface of the fixed shell 2 by bolts to limit the pole shoe clamping piece 3, and the pole shoe clamping piece 3 can move forward and backward in the space formed between the clamping piece cover plate 6 and the bottom surface of the groove on the upper surface of the fixed shell 2.

[0010] There are two pole shoe adjustment rods 1, and the upper part of the fixed shell 2 is provided with two horizontal, through-threaded holes, upper, middle and lower; the front end of the upper threaded hole is opposite to the short side of the pole shoe adjustment piece 4, and is used to install one of the pole shoe adjustment rods 1. When the pole shoe adjustment rod 1 is screwed in, the front end of the pole shoe adjustment rod 1 is against the short side of the pole shoe adjustment piece 4, pushing the pole shoe adjustment piece 4 to move forward as a whole; the front end of the middle threaded hole is opposite to the short side of the pole shoe clamping plate 3, and is used to install another pole shoe adjustment rod 1. When the pole shoe adjustment rod 1 is screwed in, the front end of the pole shoe adjustment rod 1 is against the short side of the pole shoe clamping plate 3, pushing the pole shoe clamping plate 3 to move forward as a whole; the pole shoe clamping plate 3 is used to clamp the bolts at the pole shoe, and the pole shoe adjustment piece 4 further contacts the pole shoe to adjust the rated flow; the lower threaded hole penetrates to the hollow structure part in the middle part of the fixed shell 2, and is used to install the current limiting adjustment rod 7, and the current limiting adjustment rod 7 is opposite to the current limiting hole of the cover plate of the aircraft servo valve.

[0011] The front end of the flow limiting adjustment rod 7 is a ball head structure, which contacts the flow limiting hole of the cover plate of the aircraft servo valve.

[0012] The pole shoe adjusting rod 1, the adjusting piece cover plate 5, the pressing piece cover plate 6 and the current limiting adjusting rod 7 are steel parts.

[0013] The front end of the pole shoe clamping piece 3 is a tooth-shaped structure, which cooperates with the bolts at the pole shoe to clamp the bolts.

[0014] Beneficial effects of the present invention:

[0015] 1. The present invention designs a special device for debugging an aircraft servo valve to more accurately debug the performance of the aircraft servo valve and improve efficiency.

[0016] 2. The aircraft servo valve debugging device has a pole shoe adjustment rod and a pole shoe clamping plate. The two work together to accurately adjust the pole shoe position, thereby adjusting the rated flow until it is qualified.

[0017] 3. The flow limiting adjustment rod of the aircraft servo valve debugging device has a threaded structure, and the upper end is a ball head structure. When the adjustment rod is screwed in, the ball head contacts the flow limiting hole of the servo valve cover plate, squeezing the flow limiting hole of the pressure plate to deform it, compared with the traditional direct knocking on the flow limiting hole to deform it. The servo valve limit flow can be controlled more accurately to meet the process requirements and reduce repetitive work.

[0018] 4. The present invention is a combined component, which is firmly fixed and easy to operate, thus realizing the operability of debugging the aircraft servo valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional schematic diagram of the device of the present invention;

[0020] FIG. 2( a ) is a front view of the device of the present invention, and FIG. 2( b ) is a cross-sectional view taken along the line AA of FIG. 2( a );

[0021] FIG3(a) is a top view of the fixed housing, FIG3(b) is a front view of the fixed housing, and FIG3(c) is a BB sectional view of FIG3(b);

[0022] 4(a) and 4(b) are respectively a top view and a cross-sectional view of a pole shoe adjusting plate;

[0023] Figure 5(a) and Figure 5(b) are schematic diagrams of pole shoe pressing plates, respectively;

[0024] FIG6(a) is a top view of the adjustment sheet cover, FIG6(b) is a BB-cross-sectional view of FIG6(a), and FIG6(c) is a AA-cross-sectional view of FIG6(a);

[0025] Fig. 7(a) and Fig. 7(b) are a top view and a side view of the compression sheet cover plate, and Fig. 7(c) is a cross-sectional view taken along the line AA of Fig. 7(a);

[0026] Figure 8 This is a schematic diagram of the pole shoe adjustment rod;

[0027] Fig. 9 Schematic diagram of the current limiting adjustment rod.

[0028] In the figure: 1 pole shoe adjusting rod, 2 fixed housing, 3 pole shoe clamping plate, 4 pole shoe adjusting plate, 5 adjusting plate cover plate, 6 clamping plate cover plate, 7 current limiting adjusting rod. DETAILED DESCRIPTION

[0029] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings and technical solutions.

[0030] like Figure 1 As shown in Figures 2(a) and 2(b), a special device for debugging an aircraft servo valve includes a pole shoe adjustment rod 1, a fixed shell 2, a pole shoe clamping plate 3, a pole shoe adjustment plate 4, an adjustment plate cover plate 5, a clamping plate cover plate 6 and a current limiting adjustment rod 7.

[0031] like Figure 3(a) to Figure 3(c) As shown, the fixed shell 2 has two symmetrically penetrating vertical grooves on its front end surface, which are used to mount the device on the test bench base boss and further fasten it by bolts; the upper surface of the fixed shell 2 is provided with a groove, and a hollow structure is provided below the groove.

[0032] As shown in FIG. 4( a) and FIG. 4( b), the pole shoe adjustment piece 4 is an L-shaped plate, the long side of which is placed horizontally and contacts the upper surface of the groove on the upper surface of the fixed housing 2, and the end of the long side extends out of the groove; Figure 6(a) to Figure 6(c)As shown, the adjusting piece cover plate 5 is fixedly mounted on the groove on the upper surface of the fixed housing 2 by means of bolts, so that the pole shoe adjusting piece 4 is limited in the groove, and the pole shoe adjusting piece 4 can move forward and backward in the groove.

[0033] As shown in Figures 5(a) and 5(b), the pole shoe pressing plate 3 is an L-shaped plate, the long side of which is placed horizontally and in contact with the bottom surface of the groove on the upper surface of the fixed housing 2, the end of the long side extends out of the hollow structure, and the short side is arranged vertically downward; Figure 7(a) to Figure 7(c) As shown, the pressing piece cover plate 6 is fixedly installed below the bottom surface of the groove on the upper surface of the fixed housing 2 by bolts, limiting the pole shoe pressing piece 3, and the pole shoe pressing piece 3 can move forward and backward in the space formed between the pressing piece cover plate 6 and the bottom surface of the groove on the upper surface of the fixed housing 2. The front end of the pole shoe pressing piece 3 is a toothed structure, which cooperates with the bolts at the pole shoe to compress the bolts.

[0034] like Figure 8 As shown, there are two pole shoe adjustment rods 1, and the upper part of the fixed shell 2 is provided with two horizontal, through-threaded holes, upper, middle and lower; the front end of the upper threaded hole is opposite to the short side of the pole shoe adjustment piece 4, and is used to install one of the pole shoe adjustment rods 1. When the pole shoe adjustment rod 1 is screwed in, the front end of the pole shoe adjustment rod 1 abuts on the short side of the pole shoe adjustment piece 4, pushing the pole shoe adjustment piece 4 to move forward as a whole; the front end of the middle threaded hole is opposite to the short side of the pole shoe clamping piece 3, and is used to install another pole shoe adjustment rod 1. When the pole shoe adjustment rod 1 is screwed in, the front end of the pole shoe adjustment rod 1 abuts on the short side of the pole shoe clamping piece 3, pushing the pole shoe clamping piece 3 to move forward as a whole; the pole shoe clamping piece 3 is used to tighten the bolts at the pole shoe, and the pole shoe adjustment piece 4 further contacts the pole shoe to adjust the rated flow; the lower threaded hole penetrates to the hollow structure part in the middle part of the fixed shell 2, and is used to install the current limiting adjustment rod 7, the current limiting adjustment rod 7 is opposite to the current limiting hole of the cover plate of the aircraft servo valve, and the structure of the current limiting adjustment rod 7 is as shown in Fig. 9 As shown, the front end is a ball head structure. When screwed in, the ball head contacts the flow limiting hole of the servo valve cover plate, squeezing the flow limiting hole to cause it to deform, so as to control the limit flow of the servo valve.

[0035] When debugging the flow performance of the servo valve, the servo valve is fixed on the test bench seat plate. The debugging device is designed by fixing the vertical groove of the housing 2 to clamp the test bench base boss. After aligning the knocking point, the bolt is inserted into the groove and screwed into the test bench threaded hole to fix the debugging device. When adjusting the rated flow, it is necessary to change the position of the pole shoe. By screwing in the pole shoe adjustment rod 1 at the bottom of the device, the pole shoe clamping plate 3 is pressed to tighten the bolt at the pole shoe, and then the upper pole shoe adjustment rod 1 is screwed in, and the pole shoe adjustment plate 4 is pushed in to make it contact with the pole shoe. According to the flow change, the upper pole shoe adjustment rod 1 is screwed in to adjust the rated flow. The current limiting adjustment rod 7 has a threaded structure and a ball head structure at the top. When debugging the servo valve limit flow performance, the current limiting adjustment rod 7 is screwed in, and the ball head of the adjustment rod contacts the flow limiting hole of the cover plate of the servo valve. The current limiting adjustment rod 7 is continued to be screwed in, and the flow limiting hole is squeezed to deform it to control the servo valve limit flow until the requirement is met.

Claims

1. A special device for debugging an aircraft servo valve, characterized in that: The aircraft servo valve debugging device comprises a pole shoe adjusting rod (1), a fixed housing (2), a pole shoe clamping plate (3), a pole shoe adjusting plate (4), an adjusting plate cover plate (5), a clamping plate cover plate (6) and a current limiting adjusting rod (7); The fixed shell (2) is symmetrically provided with two vertical grooves penetrating therethrough on its front end surface, which are used to mount the device on the test bench base boss and further fasten it by bolts; the upper surface of the fixed shell (2) is provided with a groove, and a hollow structure is provided below the groove; the pole shoe adjustment piece (4) is an L-shaped plate, the long side of which is placed horizontally and contacts the upper surface of the groove on the upper surface of the fixed shell (2), and the end of the long side extends out of the groove; the adjustment piece cover plate (5) is fixedly installed on the groove on the upper surface of the fixed shell (2) by bolts, and the pole shoe adjustment piece (4) is limited in the groove. The pole shoe adjusting piece (4) can move forward and backward in the groove; the pole shoe clamping piece (3) is an L-shaped plate, the long side of which is placed horizontally and in contact with the bottom surface of the groove on the upper surface of the fixed shell (2), the end of the long side extends out of the hollow structure, and the short side is arranged vertically downward; the clamping piece cover plate (6) is fixedly installed below the bottom surface of the groove on the upper surface of the fixed shell (2) by bolts to limit the pole shoe clamping piece (3), and the pole shoe clamping piece (3) can move forward and backward in the space formed between the clamping piece cover plate (6) and the bottom surface of the groove on the upper surface of the fixed shell (2); There are two pole shoe adjustment rods (1), and the upper part of the fixed housing (2) is provided with two horizontal, through-going threaded holes, one in the middle and the other in the lower part; the front end of the upper threaded hole is opposite to the short side of the pole shoe adjustment plate (4), and is used to install one of the pole shoe adjustment rods (1). When the pole shoe adjustment rod (1) is screwed in, the front end of the pole shoe adjustment rod (1) abuts against the short side of the pole shoe adjustment plate (4), pushing the pole shoe adjustment plate (4) to move forward as a whole; the front end of the middle threaded hole is opposite to the short side of the pole shoe clamping plate (3), and is used to install the other The pole shoe adjusting rod (1) is screwed in, and the front end of the pole shoe adjusting rod (1) is pressed against the short side of the pole shoe clamping plate (3), pushing the pole shoe clamping plate (3) to move forward as a whole; the pole shoe clamping plate (3) is used to clamp the bolts at the pole shoe, and the pole shoe adjusting plate (4) is further in contact with the pole shoe to adjust the rated flow; the lower threaded hole penetrates the hollow structure part in the middle of the fixed shell (2), and is used to install the current limiting adjustment rod (7), and the current limiting adjustment rod (7) is opposite to the current limiting hole of the cover plate of the aircraft servo valve.

2. The aircraft servo valve debugging device according to claim 1, characterized in that: The front end of the flow limiting adjustment rod (7) is a ball head structure, which contacts the flow limiting hole of the cover plate of the aircraft servo valve.

3. A dedicated device for debugging an aircraft servo valve according to claim 1 or 2, characterized in that: The pole shoe adjusting rod (1), the adjusting plate cover plate (5), the pressing plate cover plate (6) and the current limiting adjusting rod (7) are steel parts.

4. A dedicated device for debugging an aircraft servo valve according to claim 1 or 2, characterized in that: The front end of the pole shoe clamping piece (3) is a tooth-shaped structure, which cooperates with the bolts at the pole shoe to clamp the bolts.

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