Debugging clamp of electro-hydraulic servo valve

Abstract

The utility model provides a debugging fixture of an electro-hydraulic servo valve, which belongs to the technical field of aviation equipment, and is matched with an electro-hydraulic servo valve test bed for use, and a quick-acting rotating rod and a fine-tuning rotating rod are combined to push an adjusting sheet, so that magnetic steel and a pole shoe on two sides of the servo valve are simultaneously adjusted, and the purpose of debugging the electro-hydraulic servo valve is achieved. Wherein the quick-acting rotating rod can quickly push the inner fixing plate by rotating the outer side knob, so that the adjusting sheet can quickly reach a proper position; the fine-tuning rotary rod realizes the fine-tuning effect on the position of the adjusting sheet; the tool is easy to operate, the repairing process can be simplified, and the repairing quality is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of aviation equipment and relates to a debugging fixture for an electro-hydraulic servo valve. Background Art

[0002] An electro-hydraulic servo valve is a device that converts electrical signals into hydraulic pressure signals. When the coil of an electro-hydraulic servo valve is energized, it generates a magnetic field that attracts or repels the valve's magnet and pole piece. Depending on the magnitude and direction of the current flowing through it, the valve directs the hydraulic oil through different paths, thereby achieving the effect of controlling a large flow rate with a small signal. This is affected by the magnet and pole piece. Debugging an electro-hydraulic servo valve primarily involves changing the position of the magnet and pole piece, adjusting the current through the coil to zero when no hydraulic oil is flowing, and adjusting the hydraulic oil flow rate to the rated value at each current. Existing debugging methods for electro-hydraulic servo valves are relatively primitive. An adjusting tab is manually held and fixed to one side of the valve's magnet or pole piece. The tab is then gently tapped with another tool to adjust the position of the magnet or pole piece.

[0003] In the above method, the operator can only debug the magnet or pole shoe on one side at a time, which is relatively cumbersome for the electro-hydraulic servo valve. Often, after debugging one side, when debugging the other side, the debugged part will become invalid again due to knocking and vibration. In addition, when debugging the magnet or pole shoe on one side, it is necessary to repeatedly debug in both the inward and outward directions. Since there is no fixing device and the force applied by the tool is difficult to control, knocking often causes excessive displacement of the magnet and pole shoe. Utility Model Content

[0004] In order to solve the above problems, the utility model provides a debugging fixture for an electro-hydraulic servo valve, which can simultaneously debug the structural parameters of both sides; can provide adjustment on smaller displacements to avoid larger displacements caused by larger forces when the tool is adjusted; can provide a fixing device when the electro-hydraulic servo valve needs to be repeatedly debugged to avoid excessive displacement caused by reverse debugging; can debug different electro-hydraulic servo valves and is widely applicable.

[0005] The specific technical solutions of the utility model are as follows:

[0006] A debugging fixture for an electro-hydraulic servo valve comprises a quick-action rotary rod 1, a fine-tuning rotary rod 2, a fixing pin 3, an adjusting piece 4, an inner fixing plate 5, a guide groove 6, a housing 7, and a retraction wrench 8.

[0007] The shell 7 is a frame-type support structure, which is placed on the electro-hydraulic servo valve test bench. Threaded through holes and through holes are relatively set on the upper part of the frame at both ends. Horizontal guide grooves 6 are relatively set on both sides of the middle. Each guide groove 6 has strip through holes symmetrically set at both ends, and the four strip through holes are opposite to each other.

[0008] The quick-action rotary rod 1, fine-tuning rotary rod 2, fixing pin 3, adjusting piece 4 and inner fixing plate 5 constitute an adjustment assembly. The adjustment assembly is provided in two groups with the same structure and symmetrically arranged at the two end frames of the housing 7.

[0009] The inner fixing plate 5 is placed on the inner side of the shell 7 frame and is parallel to the end frame of the shell 7. Bosses are provided on both side end faces, which cooperate with the guide grooves 6 on both sides to guide the movement of the inner fixing plate 5. Mounting holes are made on the end faces of the bosses on both sides. The retraction wrench 8 passes through the strip through hole in the guide groove 6 and is fixed in the mounting hole on the end face of the boss to move the inner fixing plate 5 outward; a mounting groove is provided on the upper part of the inner side surface of the inner fixing plate 5 for installing the adjustment piece 4, and the adjustment piece 4 can move up and down in the mounting groove to adjust the position. A hole is made on the top of the inner fixing plate 5 to communicate with the mounting groove for inserting the fixing pin 3 to stabilize the adjustment piece 4; a through hole is made on the lower part of the fixing plate 5, and the position of the through hole corresponds to the through hole on the end frame of the shell 7.

[0010] The inner end face of the adjusting piece 4 is formed with an arc-shaped opening, the size of which matches the outer periphery of the magnet and pole shoe of the electro-hydraulic servo valve. The adjusting piece 4 is formed with multiple openings of different shapes and sizes to adapt to different types of electro-hydraulic servo valves; the outer end of the adjusting piece 4 is inserted into the mounting groove of the inner fixing plate 5 and can move up and down to adjust the position of the adjusting piece 4, and a longitudinal pin hole is formed at the end to cooperate with the fixing pin 3 to achieve the adjustment position fixation.

[0011] The quick-action rotary rod 1 is a threaded rod, which passes through the threaded through hole on the end frame of the shell 7 and is threadedly engaged. Its end contacts the inner fixed plate 5 and contacts the spherical boss on the head. The quick-action rotary rod 1 is twisted to quickly push the inner fixed plate 5 to move inward; the part of the quick-action rotary rod 1 located between the inner fixed plate 5 and the shell 7 is equipped with a large gear, which can rotate synchronously with the quick-action rotary rod 1.

[0012] The fine-tuning rotary rod 2 passes through the through holes on the frames at both ends of the shell 1 and the through holes on the inner fixed plate 5, and can rotate freely. The part between the inner fixed plate 5 and the shell 7 is installed with a small gear, and can rotate synchronously with the fine-tuning rotary rod 2. The small gear is engaged with the large gear on the fast-action rotary rod 1. The fine-tuning rotary rod 2 is rotated, and the large gear is driven by the small gear to make the fast-action rotary rod 1 produce a small rotation, thereby achieving the effect of pushing the inner fixed plate 5 by a small amount; in addition, the inner fixed plate 5 is ensured to be stable in the horizontal and vertical directions by three points: the guide groove 6, the retraction wrench 8 and the fine-tuning rotary rod 2.

[0013] The beneficial effects of the present invention are:

[0014] 1. The clamp of the utility model uses a gear transmission system to achieve mechanical control of displacement instead of the operator's feeling, and to achieve micro-operation;

[0015] 2. The utility model can adjust the structural parameters of both sides at the same time, avoiding the repeated operation process caused by unilateral adjustment;

[0016] 3. The stabilizing effect of the present invention can fix the magnet and pole shoe of the electro-hydraulic servo valve, avoiding the situation in which the adjusted parameters are damaged when adjusting other structures during the knocking debugging, and the situation in which the magnet and pole shoe components are damaged by the uneven direction of the applied force;

[0017] 4. The utility model can debug different electro-hydraulic servo valves by replacing the adjustment pieces with different opening shapes;

[0018] 5. The clamp of the utility model is easy to operate, can simplify the repair process and improve the repair quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is the front view of the utility model;

[0020] Figure 2 This is a top view of the utility model;

[0021] In the figure: 1-quick-action rotary rod; 2-fine-adjustment rotary rod; 3-fixing pin; 4-adjustment plate; 5-inner fixing plate; 6-guide groove, 7-housing; 8-retraction wrench. DETAILED DESCRIPTION

[0022] The following is a clear and complete description of the technical solution of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments improved or adjusted by ordinary technicians in this field fall within the scope of protection of the present invention.

[0023] A debugging fixture for an electro-hydraulic servo valve, the debugging fixture comprising a quick-action rotary rod 1, a fine-tuning rotary rod 2, a fixing pin 3, an adjusting plate 4, an inner fixing plate 5, a guide groove 6, a housing 7, and a retraction wrench 8. Figure 1 and Figure 2 shown.

[0024] The shell 7 is a frame-type support structure, which is placed on the electro-hydraulic servo valve test bench. Threaded through holes and through holes are relatively set on the upper part of the frames at both ends, and the through holes are located obliquely below the threaded through holes. Transverse guide grooves 6 are relatively set in the middle of the frames on both sides of the shell 7. Two strip through holes are symmetrically set at both ends of each guide groove 6, and the four strip through holes are opposite to each other.

[0025] The quick-action rotary rod 1, fine-tuning rotary rod 2, fixing pin 3, adjusting piece 4 and inner fixing plate 5 constitute an adjustment assembly. The adjustment assembly is provided in two groups with the same structure and symmetrically arranged at the two end frames of the housing 7.

[0026] The inner fixing plate 5 is placed on the inner side of the frame of the shell 7 and is parallel to the end frame of the shell 7. Bosses are provided on both side end faces, which cooperate with the guide grooves 6 on both sides to guide the movement of the inner fixing plate 5. Mounting holes are made on the end faces of the bosses on both sides. The retraction wrench 8 passes through the strip through-hole in the guide groove 6 and is fixed in the mounting hole on the end face of the boss to move the inner fixing plate 5 outward; a mounting groove is provided on the upper part of the inner side surface of the inner fixing plate 5 for installing the adjustment piece 4, and the adjustment piece 4 can move up and down in the mounting groove to adjust the position. A hole is made on the top of the inner fixing plate 5 to communicate with the mounting groove for inserting the fixing pin 3 to stabilize the adjustment piece 4; a through hole is made on the lower part of the fixing plate 5, and the position of the through hole corresponds to the through hole on the end frame of the shell 7.

[0027] The inner end face of the adjusting piece 4 is formed with an arc-shaped opening, the size of which matches the outer periphery of the magnet and pole shoe of the electro-hydraulic servo valve. The adjusting piece 4 is formed with multiple openings of different shapes and sizes to adapt to different types of electro-hydraulic servo valves; the outer end of the adjusting piece 4 is inserted into the mounting groove of the inner fixing plate 5 and can move up and down to adjust the position of the adjusting piece 4, and a longitudinal pin hole is formed at the end to cooperate with the fixing pin 3 to achieve the adjustment position fixation.

[0028] The quick-action rotary rod 1 is a threaded rod, which passes through the threaded through hole on the end frame of the shell 7 and is threadedly engaged. Its end contacts the inner fixed plate 5 and contacts the spherical boss on the head. The quick-action rotary rod 1 is twisted to quickly push the inner fixed plate 5 to move inward; the part of the quick-action rotary rod 1 located between the inner fixed plate 5 and the shell 7 is equipped with a large gear, which can rotate synchronously with the quick-action rotary rod 1.

[0029] The fine-tuning rotary rod 2 passes through the through holes on the frames at both ends of the shell 1 and the through holes on the inner fixed plate 5, and can rotate freely. The part between the inner fixed plate 5 and the shell 7 is installed with a small gear, and can rotate synchronously with the fine-tuning rotary rod 2. The small gear is engaged with the large gear on the fast-action rotary rod 1. The fine-tuning rotary rod 2 is rotated, and the large gear is driven by the small gear to make the fast-action rotary rod 1 produce a small rotation, thereby achieving the effect of pushing the inner fixed plate 5 by a small amount; in addition, the inner fixed plate 5 is ensured to be stable in the horizontal and vertical directions by three points: the guide groove 6, the retraction wrench 8 and the fine-tuning rotary rod 2.

[0030] When in use, first install the fixture and the electro-hydraulic servo valve on the test bench, and select the appropriate adjustment piece 4 according to the shape of the electro-hydraulic servo valve magnet and the pole shoe; use the fixing pin 3 to fix the two adjustment pieces 4 on the lower side of the installation slot of the two inner fixing plates 5 corresponding to the horizontal position of the electro-hydraulic servo valve magnet; rotate the fast-moving rotary rods 1 on both sides to drive the two inner fixing plates 5 to move relative to each other inward, so that the adjustment piece 4 quickly approaches the electro-hydraulic servo valve magnet to a position close to the final position; rotate the two fine-tuning rotary rods 2, through the small gear and large gear transmission, to make the inner fixing plate produce a small movement, and then accurately adjust the position of the electro-hydraulic servo valve magnet to meet the performance requirements of the electro-hydraulic servo valve; rotate the two inverse directions. 3. The two quick-acting rotary rods 1 release the inner fixing plate 5, and use the retraction wrench 8 to retract the inner fixing plate 5 to the initial positions on both sides; pull out the two fixing pins 3, adjust the two adjusting plates 4 upward to the horizontal position of the corresponding electro-hydraulic servo valve pole shoes, and fix them with the fixing pins 3; rotate the two quick-acting rotary rods 1 to make the two adjusting plates 4 move inward relative to each other, and quickly approach the pole shoes of the electro-hydraulic servo valve to a position close to the final position; rotate the two fine-tuning rotary rods 2 to fine-tune the position of the electro-hydraulic servo valve pole shoes until the performance requirements of the electro-hydraulic servo valve are met; rotate the two quick-acting rotary rods 1 in the opposite direction to release the inner fixing plate 5, and use the retraction wrench 8 to retract the inner fixing plate 5 to release the electro-hydraulic servo valve.

[0031] The above-described embodiments merely express the implementation methods of the present invention, but they should not be understood as limiting the scope of the present invention. It should be pointed out that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention.

Claims

1. A debugging fixture for an electro-hydraulic servo valve, characterized in that: The debugging fixture comprises a quick-action rotary rod (1), a fine-tuning rotary rod (2), a fixing pin (3), an adjustment plate (4), an inner fixing plate (5), a guide groove (6), and a housing (7); The housing (7) is a frame-type support structure, which is placed on an electro-hydraulic servo valve test bench. Threaded through holes and through holes are relatively arranged on the upper parts of the two end frames, and transverse guide grooves (6) are relatively arranged on both sides of the middle part. The quick-action rotary rod (1), the fine-adjustment rotary rod (2), the fixing pin (3), the adjustment plate (4), and the inner fixing plate (5) constitute an adjustment assembly. The adjustment assembly is provided in two groups with the same structure and symmetrically arranged at the two end frames of the housing (7); The inner fixing plate (5) is placed on the inner side of the housing (7) frame and is parallel to the end frame of the housing (7). Bosses are provided on both side end faces thereof, which cooperate with the guide grooves (6) on both sides to guide the movement of the inner fixing plate (5); a mounting groove is provided on the upper part of the inner side surface of the inner fixing plate (5) for mounting the adjustment piece (4); a hole is formed on the top of the inner fixing plate (5) and communicates with the mounting groove for inserting a fixing pin (3) to stabilize the adjustment piece (4); a through hole is formed on the lower part of the fixing plate (5), and the position of the through hole corresponds to the through hole on the end frame of the housing (7); The inner end surface of the adjusting piece (4) is formed with an arc-shaped opening, the size of which matches the outer periphery of the magnet and the pole shoe of the electro-hydraulic servo valve; the outer end of the adjusting piece (4) is inserted into the mounting groove of the inner fixing plate (5) and can be moved up and down, and the end is formed with a longitudinal pin hole, which cooperates with the fixing pin (3) to achieve adjustment and fixation of the position; The quick-action rotary rod (1) passes through the threaded through hole on the end frame of the housing (7) and is threadedly engaged, and its end contacts the inner fixed plate (5). The quick-action rotary rod (1) is turned to push the inner fixed plate (5) to move inward; a large gear is installed on the portion of the quick-action rotary rod (1) located between the inner fixed plate (5) and the housing (7), and can rotate synchronously with the quick-action rotary rod (1); The fine-tuning rotary rod (2) passes through the through holes on the frames at both ends of the housing 1 and the through holes on the inner fixed plate (5) and can rotate freely. A small gear is installed on the portion of the fine-tuning rotary rod between the inner fixed plate (5) and the housing (7) and can rotate synchronously with the fine-tuning rotary rod (2). The small gear is engaged with the large gear on the fast-acting rotary rod (1). The rotation of the fine-tuning rotary rod (2) drives the fast-acting rotary rod (1) to achieve fine adjustment of the inner fixed plate (5).

2. The debugging fixture of the electro-hydraulic servo valve according to claim 1, characterized in that: Both ends of the two guide grooves (6) are symmetrically provided with strip-shaped through holes, and the four strip-shaped through holes are opposite to each other. The boss end faces on both sides of the inner fixing plate (5) are both formed with mounting holes. The retraction wrench (8) passes through the strip-shaped through holes in the guide grooves (6) and is fixed in the mounting holes on the boss end faces, and is used to move the inner fixing plate (5) outward.

3. The debugging fixture of the electro-hydraulic servo valve according to claim 1, characterized in that: The adjusting piece (4) is provided with a plurality of openings of different shapes and sizes to adapt to electro-hydraulic servo valves of different models.

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