Hydraulic system for servo valve test bed

Abstract

The invention discloses a hydraulic system for a servo valve test bed, and relates to the technical field of servo valve hydraulics, the hydraulic system comprises a bottom plate, the lower side of the bottom plate is fixedly connected with supporting legs, the upper side of the bottom plate is fixedly connected with an oil tank, a variable pump and a high-pressure oil filter, and the upper side of the bottom plate is provided with a stabilizing unit for stabilizing the high-pressure oil filter to operate. Oil pipes are arranged on the left side and the right side of the high-pressure oil filter, the stabilizing unit comprises a plurality of stand columns, the stand columns are fixedly connected to the upper side of the bottom plate, fixing rings are fixedly connected to the upper ends of the stand columns, and vibration reduction assemblies are arranged on the inner sides of the fixing rings. According to the hydraulic system for the servo valve test bed, through the arrangement of the fixing ring, the stand columns, the branch rods, the clamping blocks, the rubber blocks, the lifting rods, the chassis and the electric push rod, the electric push rod is conveniently controlled to stretch out and draw back, the rubber blocks on the multiple clamping blocks are controlled to make contact with a high-pressure oil filter, and vibration generated by the high-pressure oil filter is conveniently buffered; and the stability of the high-pressure oil filter during operation is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of servo valve hydraulics, in particular to a hydraulic system for a servo valve test bench. Background Art

[0002] A servo valve is a high-precision electro-hydraulic control component that converts weak electrical signals into high-power hydraulic output, achieving precise control of flow, pressure, or direction. When testing a servo valve on a test bench, the hydraulic system is the core component of the servo valve test bench, responsible for providing a stable and controllable hydraulic power source to simulate the actual operating conditions of the servo valve.

[0003] After searching, the Chinese patent with application number "201721106423.7" is specifically an intelligent power control system for an electric power equipment test bench, including a servo actuator, a constant pressure variable pump, an oil tank, a cooler and a pressure regulating block; the constant pressure variable pump, the pressure regulating block, the cooler and the oil tank are connected in sequence through pipes to form a closed loop; the pressure regulating block includes an electromagnetic reversing valve, a high-pressure oil filter, an electromagnetic overflow valve, a forward hydraulic port and a reverse hydraulic port, and the forward hydraulic port and the reverse hydraulic port are connected to the servo actuator through pipes; the electromagnetic reversing valve is used to change the direction of the output hydraulic pressure, the high-pressure oil filter is used to filter impurities in the oil, the electromagnetic overflow valve is used to adjust the size of the output hydraulic pressure, the forward hydraulic port is used to provide forward hydraulic pressure to the servo actuator, and the reverse hydraulic port is used to provide reverse hydraulic pressure to the servo actuator.

[0004] In the above patent, a high-pressure oil filter is provided in the hydraulic system to filter the hydraulic oil to ensure the cleanliness of the hydraulic oil during the servo valve test. When the hydraulic oil is filtered, the high-pressure and fast-flowing hydraulic oil flows into the high-pressure oil filter, causing the high-pressure oil filter to vibrate greatly. These vibrations accumulate over a long period of time and easily loosen the connection between the high-pressure oil filter and the hydraulic oil pipe, thereby causing the hydraulic oil to leak out easily, which is not conducive to the smooth progress of the test. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the present invention provides a hydraulic system for a servo valve test bench, which solves the problem that the high-pressure oil filter in the hydraulic system generates large vibrations when in use, causing the hydraulic oil to leak easily.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] A hydraulic system for a servo valve test bench includes a base plate, a support leg is fixedly connected to the lower side of the base plate, an oil tank, a variable pump and a high-pressure oil filter are fixedly connected to the upper side of the base plate, a stabilizing unit for stabilizing the operation of the high-pressure oil filter is provided on the upper side of the base plate, oil pipes are provided on both sides of the left and right sides of the high-pressure oil filter, the stabilizing unit includes a plurality of columns, and the plurality of columns are fixedly connected to the upper side of the base plate, a fixing ring is fixedly connected to the upper end of the column, a vibration damping assembly is provided on the inner side of the fixing ring, and a support assembly is provided on the outer side of the fixing ring.

[0008] Preferably, the vibration damping assembly includes a plurality of branch rods, the outer sides of the plurality of branch rods are arranged on the inner side of the fixing ring, one end of the branch rod passes through the outer side of the fixing ring and is provided with a rectangular groove, the other end of the branch rod is fixedly connected to a clamping block, the side of the clamping block close to the high-pressure oil filter is fixedly connected to a rubber block, the inner sides of the plurality of rectangular grooves are rotatably connected to an inclined plate 1, the outer side of a lower end of the inclined plate is rotatably connected to a connecting block 1, the lower side of the connecting block 1 is fixedly connected to a lifting ring, the lower side of the lifting ring is fixedly connected to a lifting rod, the lower end of the lifting rod passes through the lower side of the base plate and is fixedly connected to the bottom block, the outer side of the bottom block is fixedly connected to a chassis, and an electric push rod is fixedly connected between the chassis and the base plate.

[0009] Preferably, the outer sides of the plurality of branch rods are fixedly connected with branch rings, the lower sides of the plurality of branch rings are fixedly connected with branch blocks, the branch blocks are fixedly connected with a mounting plate on the side close to the high-pressure oil filter, the outer side of the mounting plate is fixedly connected with moving block one, an air frame is provided on the outer side of the moving block one, a moving block two is provided on the inner side of the air frame, and the moving block two is fixedly connected with a vibration damping block on the side close to the high-pressure oil filter.

[0010] Preferably, the outer side of the air frame is fixedly connected to a fixed frame, the front and rear sides of the fixed frame are fixedly connected to side plates, a sliding groove is provided on the upper side of the side plate, the inner side of the sliding groove is slidably connected to a slider, the outer side of the slider is rotatably connected to two inclined plates 2, the outer sides of the mounting plate and the vibration damping block are fixedly connected to connecting block 2, the connecting block 2 is rotatably connected to inclined plate 2, and the moving block 1 and moving block 2 are both slidably connected to the air frame.

[0011] Preferably, the support assembly includes two branch tubes, the two branch tubes are fixedly connected to the outer side of the fixing ring, the outer side of the branch tube is fixedly connected to a mounting rod, the outer end of the mounting rod is fixedly connected to a stabilizing plate, a mounting hole is provided on the outer side of the stabilizing plate, the inner side of the mounting hole is fixedly connected to an air bag, the upper side of the base plate is fixedly connected to an air cylinder, a piston disk is provided on the inner side of the air cylinder, a moving tube is fixedly connected between the piston disk and the lifting ring, and a connecting tube is fixedly connected between the air cylinder and the air bag.

[0012] Preferably, a movable groove is provided on the outer side of the stabilizing plate, and a lifting block 2 is slidably connected to the inner side of the movable groove. Two inclined plates 3 are rotatably connected to the outer side of the lifting block 2. A guide plate is fixedly connected to the upper side of the bottom plate and the front and rear sides of the stabilizing plate. A guide block is slidably connected to the outer side of the guide plate. A connecting block 3 is fixedly connected to the upper side of the guide block, and the connecting block 3 is rotatably connected to the inclined plate 3.

[0013] Preferably, a damper 2 and a buffer spring 2 are fixedly connected between the upper side of the lifting block 2 and the inner wall of the movable groove, a mounting block is fixedly connected to the outer side of the guide plate, and a damper 1 and a buffer spring 1 are fixedly connected between the mounting block and the guide block.

[0014] Beneficial effects

[0015] The present invention provides a hydraulic system for a servo valve test bench. Compared with the prior art, it has the following advantages:

[0016] Beneficial effects:

[0017] (1) The hydraulic system of the servo valve test bench is provided with a fixing ring, a column, a branch rod, a clamping block, a rubber block, a lifting rod, a chassis and an electric push rod, which facilitates the control of the extension and retraction of the electric push rod and the control of the contact between the rubber blocks on the multiple clamping blocks and the high-pressure oil filter, thereby facilitating the buffering of the vibration generated by the high-pressure oil filter and increasing the stability of the high-pressure oil filter during operation.

[0018] (2) The hydraulic system of the servo valve test bench is provided with a branch ring, a branch block, an air frame, a moving block 1, a moving block 2 and a contact block, which facilitates the cooperation between the contact block and the air frame, reduces vibration at multiple positions of the high-pressure oil filter, and enhances the stability of the high-pressure oil filter.

[0019] (3) The hydraulic system of the servo valve test bench is provided with a stabilizing plate, a mounting hole, an air bag, an air cylinder, and a connecting pipe. When the rubber block contacts the high-pressure oil filter, the expansion of the air bag in the mounting hole is controlled, thereby reinforcing the oil pipe. Furthermore, the vibration of the oil pipe surface is buffered by the inclined plate 3, the guide plate, the guide block, the damper 1 and the damper 2, thereby preventing the oil pipe from loosening. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is the overall three-dimensional structural diagram of the present invention;

[0021] Figure 2 It is a partial three-dimensional structural diagram of the present invention;

[0022] Figure 3 It is a partial three-dimensional structural diagram of the stabilizing unit in the present invention;

[0023] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0024] Figure 5 It is a partial three-dimensional structural diagram of the vibration reduction assembly of the present invention;

[0025] Figure 6 A partially cutaway perspective structural diagram of the vibration damping assembly of the present invention;

[0026] Figure 7 It is a partially cutaway perspective structural diagram of the support assembly of the present invention;

[0027] Figure 8 for Figure 7 Enlarged view of point B in the middle;

[0028] Figure 9 for Figure 7 Enlarged view of point C in the middle.

[0029] In the figure: 1. bottom plate; 2. support leg; 3. oil tank; 4. variable displacement pump; 5. oil pipe; 6. high-pressure oil filter; 7. stabilizing unit; 71. fixing ring; 72. column; 73. vibration damping assembly; 74. support assembly; 731. branch rod; 732. clamping block; 733. rubber block; 734. rectangular groove; 735. inclined plate 1; 736. connecting block 1; 737. lifting ring; 738. lifting rod; 739. bottom block; 7310. chassis; 7311. electric push rod; 7312. branch ring; 7313. branch block; 7314. mounting plate; 7315. moving block 1; 7316. moving block 2; 7317. vibration damping block; 7318. air frame; 7319, fixed frame; 7320, side plate; 7321, slide groove; 7322, slider; 7323, inclined plate 2; 7324, connecting block 2; 741, air cylinder; 742, piston disc; 743, moving tube; 744, connecting tube; 745, branch tube; 746, mounting rod; 747, stabilizing plate; 748, mounting hole; 749, air bag; 7410, moving groove; 7411, lifting block 2; 7412, inclined plate 3; 7413, connecting block 3; 7414, guide block; 7415, guide plate; 7416, mounting block; 7417, damper 1; 7418, buffer spring 1; 7419, damper 2; 7420, buffer spring 2. DETAILED DESCRIPTION

[0030] 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 making creative efforts are within the scope of protection of the present invention.

[0031] The present invention provides the following technical solutions:

[0032] Example 1

[0033] See also Figures 1-6 , a hydraulic system for a servo valve test bench includes a base plate 1, a supporting leg 2 is fixedly connected to the lower side of the base plate 1, an oil tank 3, a variable pump 4 and a high-pressure oil filter 6 are fixedly connected to the upper side of the base plate 1, a stabilizing unit 7 for stabilizing the operation of the high-pressure oil filter 6 is provided on the upper side of the base plate 1, and oil pipes 5 are provided on the left and right sides of the high-pressure oil filter 6. The stabilizing unit 7 includes a plurality of columns 72, and the plurality of columns 72 are fixedly connected to the upper side of the base plate 1. The upper ends of the columns 72 are fixedly connected to the upper side of the base plate 1, and a fixing ring 71 is fixedly connected to the upper ends of the columns 72. A vibration damping assembly 73 is provided on the inner side of the fixing ring 71, and a supporting assembly 74 is provided on the outer side of the fixing ring 71. The oil tank 3 and the variable pump 4 are connected together, and the high-pressure oil filter 6 is connected to the variable pump 4, and is connected to the servo valve through the oil pipe 5, which is convenient for testing the servo valve. During the test, the stabilizing unit 7 is used to increase the overall stability of the high-pressure oil filter 6 to avoid affecting the progress of the test.

[0034] The vibration reduction assembly 73 includes a plurality of branch rods 731, the outer sides of the plurality of branch rods 731 are all arranged on the inner side of the fixing ring 71, one end of the branch rod 731 passes through the outer side of the fixing ring 71 and is provided with a rectangular groove 734, the other end of the branch rod 731 is fixedly connected to a clamping block 732, and the side of the clamping block 732 close to the high-pressure oil filter 6 is fixedly connected to a rubber block 733, the inner sides of the plurality of rectangular grooves 734 are rotatably connected to an inclined plate 1 735, the outer side of the lower end of the inclined plate 1 735 is rotatably connected to a connecting block 1 736, the lower side of the connecting block 1 736 is fixedly connected to a lifting ring 737, the lower side of the lifting ring 737 is fixedly connected to a lifting rod 738, the lower end of the lifting rod 738 passes through the lower side of the bottom plate 1 and is fixedly connected to a bottom block 739, the outer side of the bottom block 739 is fixedly connected to the chassis 7310, and the chassis 7310 and the bottom plate 1 are connected. An electric push rod 7311 is fixedly connected to the front. Before using the high-pressure oil filter 6, first control the electric push rod 7311 to drive the chassis 7310 to descend, the chassis 7310 drives the bottom block 739 to descend, the bottom block 739 drives the lifting rod 738 to descend, the lifting rod 738 drives the lifting ring 737 to descend, and the lifting ring 737 drives the inclined plate 1 735 to rotate. Since multiple inclined plates 1 735 are arranged in a circular array, the inclined plate 1 735 drives the branch rod 731 to move toward the high-pressure oil filter 6, the branch rod 731 drives the clamping block 732 to move, and the clamping block 732 drives the rubber block 733 to move, so that the multiple rubber blocks 733 are close to the high-pressure oil filter 6, which facilitates the contact between the multiple rubber blocks 733 and the high-pressure oil filter 6, so that the rubber block 733 can buffer the vibration generated by the high-pressure oil filter 6, thereby increasing the overall stability of the high-pressure oil filter 6.

[0035] The outer sides of the plurality of branch rods 731 are fixedly connected with branch rings 7312, the lower sides of the plurality of branch rings 7312 are fixedly connected with branch blocks 7313, the side of the branch block 7313 close to the high-pressure oil filter 6 is fixedly connected with a mounting plate 7314, the outer side of the mounting plate 7314 is fixedly connected with a moving block 1 7315, the outer side of the moving block 1 7315 is provided with an air frame 7318, the inner side of the air frame 7318 is provided with a moving block 2 7316, and the side of the moving block 2 7316 close to the high-pressure oil filter 6 is fixedly connected with a vibration damping block 7317, the outer side of the air frame 7318 is fixedly connected to the fixed frame 7319, and the front and rear sides of the fixed frame 7319 are fixedly connected to the side plates 7320. The upper side of the side plates 7320 is provided with a sliding groove 7321, and the inner side of the sliding groove 7321 is slidably connected to the slider 7322. The outer side of the slider 7322 is rotatably connected to two inclined plates 7323. The outer sides of the mounting plate 7314 and the vibration damping block 7317 are fixedly connected to the connecting block 7324. The connecting block 7324 is rotatably connected to the inclined plate 7323. The movable block 7317 is fixedly connected to the outer side of the air frame 7318. 315. The second moving block 7316 is slidably connected to the air frame 7318. When the rubber block 733 contacts the high-pressure oil filter 6, the branch rod 731 drives the branch ring 7312 to move, the branch ring 7312 drives the branch block 7313 to move, and the branch block 7313 drives the vibration-damping block 7317 on the second moving block 7316 to move, so that the vibration-damping block 7317 contacts the high-pressure oil filter 6. When the high-pressure oil filter 6 vibrates, the vibration-damping block 7317 moves slightly, and the vibration-damping block 7317 drives the second moving block 7316 to move. The air frame 7318 is filled with gas, which drives the air frame 7318 to move, thereby reducing the movement amplitude of the vibration damping block 7317, buffering the vibration of multiple positions of the high-pressure oil filter 6, and enhancing the overall stability of the high-pressure oil filter 6. When the air frame 7318 moves, the air frame 7318 drives the fixed frame 7319 to move, and the fixed frame 7319 drives the side plate 7320 to move. When the vibration damping block 7317 moves, under the action of the inclined plate 2 7323, the slider 7322 is controlled to move, thereby enhancing the stability of the vibration damping block 7317.

[0036] Example 2

[0037] Based on the first embodiment, Figure 7-Figure 8As shown, the support assembly 74 includes two branch cylinders 745, the two branch cylinders 745 are fixedly connected to the outside of the fixing ring 71, the outside of the branch cylinder 745 is fixedly connected to a mounting rod 746, the outer end of the mounting rod 746 is fixedly connected to a stabilizing plate 747, the outside of the stabilizing plate 747 is provided with a mounting hole 748, the inside of the mounting hole 748 is fixedly connected to an air bag 749, the upper side of the bottom plate 1 is fixedly connected to an air cylinder 741, the inside of the air cylinder 741 is provided with a piston disc 742, and the piston disc 742 is fixedly connected to the lifting ring 737. It is connected to a movable tube 743, and a connecting tube 744 is fixedly connected between the air cylinder 741 and the air bag 749. When the rubber block 733 contacts the high-pressure oil filter 6, the lifting ring 737 drives the movable tube 743 to descend, and the movable tube 743 drives the piston disk 742 to descend, pushing the gas in the air cylinder 741 out and transporting the gas to the air bag 749 through the connecting tube 744, so that the air bag 749 expands. Since the air bag 749 is arranged on the outside of the oil pipe 5, it is convenient for the air bag 749 to reinforce the oil pipe 5 and reduce the impact of vibration on the oil pipe 5.

[0038] A movable groove 7410 is provided on the outer side of the stabilizing plate 747. A lifting block 2 7411 is slidably connected to the inner side of the movable groove 7410. The outer side of the lifting block 2 7411 is rotatably connected to two inclined plates 3 7412. A guide plate 7415 is fixedly connected to the upper side of the bottom plate 1 and located on the front and rear sides of the stabilizing plate 747. A guide block 7414 is slidably connected to the outer side of the guide plate 7415. A connecting block 3 7413 is fixedly connected to the upper side of the guide block 7414. The connecting block 3 7413 is rotatably connected to the inclined plate 3 7412. A damper 2 7419 and a buffer spring 2 7420 are fixedly connected between the upper side of the lifting block 2 7411 and the inner wall of the movable groove 7410. A mounting block 7416 is fixedly connected to the outer side of the guide plate 7415, and a damper 1 7417 and a buffer spring 1 7418 are fixedly connected between the mounting block 7416 and the guide block 7414. When the high-pressure oil filter 6 vibrates, the vibration causes the lifting block 2 7411 to move, and the lifting block 2 7411 drives the inclined plate 3 7412 to rotate, and the inclined plate 3 7412 drives the guide block 7414 to move. Under the action of the damper 1 7417, the buffer spring 1 7418, the damper 2 7419 and the buffer spring 2 7420, the movement amplitude of the guide block 7414 and the lifting block 2 7411 is conveniently reduced, thereby reducing the influence of vibration on the stable connection between the oil pipe 5 and the high-pressure oil filter 6.

[0039] Working principle: When in use, the electric push rod 7311 is controlled to drive the chassis 7310 to descend. Under the action of the bottom block 739, the lifting rod 738, the lifting ring 737 and the inclined plate 1 735, the multiple branch rods 731 are controlled to move. The branch rods 731 drive the rubber blocks 733 on the clamping block 732 to approach the high-pressure oil filter 6, making it easier for the multiple rubber blocks 733 to contact the high-pressure oil filter 6, thereby increasing the stability of the high-pressure oil filter 6. At the same time, the branch blocks 7313, the air frame 7318, the moving block 2 7316, and the moving block 1 7315 Under the action of the vibration damping block 7317, the vibration of the high-pressure oil filter 6 is conveniently buffered. At the same time, the lifting ring 737 drives the movable tube 743 to descend. Under the action of the piston plate 742 and the connecting tube 744, the air bags 749 on both sides are expanded, which is convenient for reinforcing the oil pipe 5. Through the action of the inclined plate three 7412, the guide block 7414, the damper one 7417, the buffer spring one 7418, the damper two 7419 and the buffer spring two 7420, the influence of vibration on the stable connection between the oil pipe 5 and the high-pressure oil filter 6 is conveniently reduced.

[0040] It should be noted that, in this document, relational terms such as first and second, etc., 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 "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0041] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A hydraulic system for a servo valve test bench, comprising a base plate (1), characterized in that: The lower side of the base plate (1) is fixedly connected to a support leg (2), the upper side of the base plate (1) is fixedly connected to an oil tank (3), a variable pump (4) and a high-pressure oil filter (6), the upper side of the base plate (1) is provided with a stabilizing unit (7) for stably operating the high-pressure oil filter (6), the left and right sides of the high-pressure oil filter (6) are provided with oil pipes (5), the stabilizing unit (7) includes a plurality of columns (72), the plurality of columns (72) are fixedly connected to the upper side of the base plate (1), the upper ends of the columns (72) are fixedly connected to a fixing ring (71), the inner side of the fixing ring (71) is provided with a vibration reduction component (73), and the outer side of the fixing ring (71) is provided with a support component (74).

2. The hydraulic system for a servo valve test bench according to claim 1, characterized in that: The vibration reduction assembly (73) includes a plurality of branch rods (731), the outer sides of the plurality of branch rods (731) are all arranged on the inner side of the fixing ring (71), one end of the branch rod (731) passes through the outer side of the fixing ring (71) and is provided with a rectangular groove (734), the other end of the branch rod (731) is fixedly connected to a clamping block (732), the side of the clamping block (732) close to the high-pressure oil filter (6) is fixedly connected to a rubber block (733), and the inner sides of the plurality of rectangular grooves (734) are rotatably connected to a slanted plate (735). The outer side of the lower end of the inclined plate (735) is rotatably connected to a connecting block (736), the lower side of the connecting block (736) is fixedly connected to a lifting ring (737), the lower side of the lifting ring (737) is fixedly connected to a lifting rod (738), the lower end of the lifting rod (738) passes through the lower side of the bottom plate (1) and is fixedly connected to a bottom block (739), the outer side of the bottom block (739) is fixedly connected to a chassis (7310), and an electric push rod (7311) is fixedly connected between the chassis (7310) and the bottom plate (1).

3. The hydraulic system for a servo valve test bench according to claim 2, characterized in that: The outer sides of the plurality of branch rods (731) are fixedly connected with branch rings (7312), the lower sides of the plurality of branch rings (7312) are fixedly connected with branch blocks (7313), the side of the branch block (7313) close to the high-pressure oil filter (6) is fixedly connected with a mounting plate (7314), the outer side of the mounting plate (7314) is fixedly connected with a moving block 1 (7315), the outer side of the moving block 1 (7315) is provided with an air frame (7318), the inner side of the air frame (7318) is provided with a moving block 2 (7316), and the side of the moving block 2 (7316) close to the high-pressure oil filter (6) is fixedly connected with a vibration damping block (7317).

4. The hydraulic system for a servo valve test bench according to claim 3, characterized in that: The outer side of the air frame (7318) is fixedly connected to a fixed frame (7319), and the front and rear sides of the fixed frame (7319) are fixedly connected to side plates (7320). A sliding groove (7321) is provided on the upper side of the side plate (7320), and a slider (7322) is slidably connected to the inner side of the sliding groove (7321). The outer side of the slider (7322) is rotatably connected to two inclined plates (7323). The outer sides of the mounting plate (7314) and the vibration damping block (7317) are fixedly connected to connecting block (7324). The connecting block (7324) is rotatably connected to inclined plate (7323). The moving block (7315) and the moving block (7316) are both slidably connected to the air frame (7318).

5. The hydraulic system for a servo valve test bench according to claim 2, characterized in that: The support assembly (74) includes two branch tubes (745), the two branch tubes (745) are fixedly connected to the outer side of the fixing ring (71), the outer side of the branch tube (745) is fixedly connected with a mounting rod (746), the outer end of the mounting rod (746) is fixedly connected with a stabilizing plate (747), the outer side of the stabilizing plate (747) is provided with a mounting hole (748), the inner side of the mounting hole (748) is fixedly connected with an air bag (749), the upper side of the bottom plate (1) is fixedly connected with an air cylinder (741), the inner side of the air cylinder (741) is provided with a piston disc (742), a moving tube (743) is fixedly connected between the piston disc (742) and the lifting ring (737), and a connecting tube (744) is fixedly connected between the air cylinder (741) and the air bag (749).

6. The hydraulic system for a servo valve test bench according to claim 5, characterized in that: The outer side of the stabilizing plate (747) is provided with a movable groove (7410), the inner side of the movable groove (7410) is slidably connected to a lifting block 2 (7411), the outer side of the lifting block 2 (7411) is rotatably connected to two inclined plates 3 (7412), the upper side of the bottom plate (1) and the front and rear sides of the stabilizing plate (747) are fixedly connected with a guide plate (7415), the outer side of the guide plate (7415) is slidably connected to a guide block (7414), the upper side of the guide block (7414) is fixedly connected to a connecting block 3 (7413), and the connecting block 3 (7413) is rotatably connected to the inclined plate 3 (7412).

7. The hydraulic system for a servo valve test bench according to claim 6, characterized in that: A damper 2 (7419) and a buffer spring 2 (7420) are fixedly connected between the upper side of the lifting block 2 (7411) and the inner wall of the movable groove (7410), a mounting block (7416) is fixedly connected to the outer side of the guide plate (7415), and a damper 1 (7417) and a buffer spring 1 (7418) are fixedly connected between the mounting block (7416) and the guide block (7414).

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