Energy-saving test bench for aero-engine high-speed hydraulic dynamometer

Abstract

The invention relates to the technical field of engine testing, and discloses an aero-engine high-speed hydraulic dynamometer energy-saving test bench, which comprises a dynamometer main body, a main shaft is arranged in the dynamometer main body, one side of the dynamometer main body is fixedly connected with a main connecting block, and the middle position of the main connecting block is rotatably connected with a threaded rod. The outer portion of the threaded rod is in threaded connection with a threaded block slidably connected with the main connecting block, and the side, away from the main connecting block, of the threaded block is fixedly connected with a connecting shell. According to the energy-saving test bench for the high-speed hydraulic dynamometer of the aero-engine, when the coaxiality deviation of the housing of the dynamometer main body and the main shaft is increased, the motion expansion disc is driven to rotate through the transmission of the pressed roller, the pressed plate, the rack plate and the transmission gear, and because the diameter of the motion expansion disc is larger, the coaxiality of the dynamometer main body and the main shaft is greatly improved. Therefore, the size of the coaxiality deviation between the dynamometer main body shell and the main shaft can be obviously shown, and the coaxiality deviation between the dynamometer main body shell and the main shaft can be timely perceived after exceeding the range.

Description

Technical Field

[0001] The present invention relates to the technical field of engine testing, and particularly to an energy-saving test bench for a high-speed hydraulic dynamometer of an aeroengine. Background Art

[0002] Currently, when measuring the output power of an aeroengine, we can use precision devices such as hydraulic dynamometers, eddy current dynamometers, or electric dynamometers. Among them, hydraulic dynamometers are particularly commonly used. It is a device that uses a liquid (mostly water) as a medium to accurately measure the power of an engine. Its operation mechanism is ingenious. By adjusting the liquid flow resistance to apply a load, it effectively absorbs the power released by the engine and converts this energy into heat energy and then discharges it. Because the hydraulic dynamometer can generate a load without an external power supply, and can convert mechanical energy into heat energy and discharge it through a cooling system, while realizing the recycling of water resources, it is superior to other dynamometers in terms of energy saving and application scope, and is more widely used.

[0003] For example, the patent with the patent authorization announcement number CN217384712U discloses a hydraulic dynamometer with sudden acceleration and sudden unloading, which includes a hydraulic dynamometer, an inlet waterway and an outlet waterway connected to the hydraulic dynamometer. An accelerating water inlet device is arranged on the inlet waterway, and an accelerating water drainage device is arranged on the outlet waterway. The accelerating water inlet device includes a first gas storage cylinder, a first high-pressure buffer tank, and a first ball valve arranged in sequence along the inlet direction on the inlet waterway. The water outlet end of the first ball valve flows into the hydraulic dynamometer; the accelerating water drainage device includes a second gas storage cylinder and a pneumatic inlet valve arranged along the outlet direction. The output end of the pneumatic inlet valve is connected to the hydraulic dynamometer, and an electric drain valve and a pneumatic drain valve are led out from the output end of the hydraulic dynamometer. Two devices for rapid water inlet and rapid discharge are added. It has more prominent motor test characteristics for engines compared with traditional hydraulic dynamometers.

[0004] The above-mentioned hydraulic dynamometer still has certain defects: During the long-term operation of the current hydraulic dynamometer, the main shaft may produce micro-deformations due to thermal expansion or mechanical stress, and the outer shell may also be displaced by the water pressure impact, thereby aggravating the deviation of the coaxiality between the main shaft and the outer shell. Once the deviation of the coaxiality between the outer shell and the main shaft exceeds the range, the swing of the outer shell will cause additional friction or vibration, resulting in an unstable operating state of the dynamometer. If this problem is not detected in time and the equipment is in this unstable state for a long time, it will not only significantly reduce the test accuracy, but also shorten the service life of the equipment, bringing many inconveniences to the maintenance and use of the equipment. Summary of the Invention

[0005] In view of the deficiencies of the prior art, the present invention provides an energy-saving test bench for a high-speed hydraulic dynamometer of an aeroengine, which can detect in time when the coaxiality deviation of the dynamometer main body exceeds the range.

[0006] To achieve the above object, the present invention provides the following technical solution: An energy-saving test bench for a high-speed hydraulic dynamometer of an aero-engine, comprising a dynamometer main body, a main shaft is installed in the dynamometer main body, a main connection block is fixedly connected to one side of the dynamometer main body, a threaded rod is rotatably connected to the middle position of the main connection block, a threaded block slidably connected to the main connection block is threadedly connected to the outside of the threaded rod, a connection housing is fixedly connected to the side of the threaded block away from the main connection block, a pressure-receiving plate is slidably connected to the side of the connection housing away from the main connection block, a pressure-receiving roller is installed on the top of the pressure-receiving plate, a rack plate is fixedly connected to the side of the pressure-receiving plate away from the main connection block, a rotating shaft rotatably connected to the connection housing is provided on the side of the pressure-receiving plate away from the main connection block, a transmission gear meshing with the rack plate is fixedly connected to the middle position of the rotating shaft, a motion expansion disk is fixedly connected to one end of the rotating shaft, and a warning component is fixedly connected to the side of the connection housing away from the main connection block.

[0007] Further, the warning component includes a connecting plate, a fixing plate, a sliding rod, a traction plate, a warning strip and an unfolding elastic member. One end of the connecting plate is fixedly connected to the connection housing, the other end of the connecting plate is fixedly connected to the fixing plate, sliding rods are slidably connected to the upper and lower ends of the fixing plate respectively, a traction plate is fixedly connected to one end of the sliding rod, a warning strip is fixedly connected between the traction plate and the fixing plate, an unfolding elastic member is sleeved on the end of the sliding rod close to the traction plate, one end of the unfolding elastic member is fixedly connected to the fixing plate, and the other end of the unfolding elastic member is fixedly connected to the traction plate.

[0008] Further, an anti-detachment block is fixedly connected to the end of the sliding rod away from the traction plate, a hook block is fixedly connected to the side of the upper end of the traction plate close to the motion expansion disk, a sliding groove is formed on the side of the motion expansion disk close to the traction plate, a sliding sleeve is slidably connected in the sliding groove, a stop block matching with the hook block is fixedly connected to the side of the sliding sleeve close to the traction plate, and a positioning bolt is threadedly connected to the sliding sleeve, and the end of the positioning bolt abuts against the side wall of the motion expansion disk.

[0009] Further, a pressing plate is fixedly connected to the side of the motion expansion disk close to the main connection block, a receiving groove is formed on the side of the connection housing close to the main connection block, a wedge-shaped block is slidably connected to one end of the receiving groove close to the motion expansion disk, an outward pushing elastic member is fixedly connected to the side of the wedge-shaped block away from the motion expansion disk, and the other end of the outward pushing elastic member is fixedly connected to the end of the receiving groove.

[0010] Further, a positioning groove is formed inside the connecting housing. A positioning block is slidably connected inside the positioning groove. A positioning column is slidably connected to the middle position of the positioning block. Two ends of the positioning column are fixedly connected to the top and bottom of the positioning groove respectively. A reset elastic member is sleeved on the lower end of the positioning column. The upper end of the reset elastic member is fixedly connected to the positioning block. The lower end of the reset elastic member is fixedly connected to the bottom of the positioning groove. The positioning block is fixedly connected to the side wall of the pressure receiving plate.

[0011] Further, a slider is slidably connected to the top of the pressure receiving plate. A pressure receiving roller is rotatably connected to the top of the slider. A fixing bolt is slidably connected to the upper end of the pressure receiving plate. The end of the fixing bolt penetrates through the pressure receiving plate and the slider and is threadedly connected to a fixing nut.

[0012] Further, a clamping groove is formed on one side of the threaded block close to the connecting housing. A clamping block is slidably connected inside the clamping groove. The clamping block is fixedly connected to the outer wall of the connecting housing. An installation bolt is slidably connected to the threaded block. One end of the installation bolt penetrates through the threaded block and the clamping block and is threadedly connected to an installation nut.

[0013] Further, a side connecting block is fixedly connected to the lower end of one side of the main connecting block. A connecting shaft is rotatably connected to the middle position of the side connecting block. A fine adjustment handwheel is fixedly connected to the top of the connecting shaft. A driving gear is fixedly connected to the bottom of the connecting shaft. A coarse adjustment handwheel is fixedly connected to the top of the threaded rod. A follower gear meshing with the driving gear is fixedly connected to the bottom of the threaded rod. The diameter of the follower gear is larger than that of the driving gear.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. For this energy-saving test bench of a high-speed hydraulic dynamometer for an aeroengine, when the coaxiality deviation between the housing of the dynamometer main body and the main shaft increases, the pressure receiving roller and the pressure receiving plate will be squeezed by the main shaft. The pressure receiving plate will drive the rack plate to move downward, and the rack plate will push the transmission gear to rotate. The transmission gear will drive the movement expansion disc to rotate. Since the diameter of the movement expansion disc is larger, the coaxiality deviation between the housing of the dynamometer main body and the main shaft can be more significantly shown, so that the coaxiality deviation between the housing of the dynamometer main body and the main shaft can be detected in time after exceeding the range.

[0015] 2. For this energy-saving test bench of a high-speed hydraulic dynamometer for an aeroengine, after the coaxiality deviation between the housing of the dynamometer main body and the main shaft exceeds the range, the stopper on the movement expansion disc will disengage from the hook block. After the hook block loses its restriction, the unfolding elastic member will drive the traction plate to move away from the fixing plate, and then the warning strip will be unfolded, making it easier for the operator to discover.

[0016] 3. During the rotation of the motion expansion disc of this energy-saving test bench for aero-engine high-speed hydraulic dynamometers, the extrusion plate will extrude the wedge block. When the stopper on the motion expansion disc disengages from the hook block, the extrusion plate will also pass over the wedge block, and the wedge block will return to its original position under the action of the outward pushing elastic member, thereby restricting the extrusion plate and preventing the motion expansion disc from rotating back to its original position, which may cause operators to think that the warning component is triggered by a fault. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the whole of the present invention; Figure 2 is a schematic structural diagram of the whole of the present invention when viewed from below; Figure 3 is a schematic connection structure diagram of the main connection block, connection housing and fixing plate of the present invention; Figure 4 is a schematic structural diagram of the main connection block, connection housing and fixing plate of the present invention when unfolded; Figure 5 is a partial cross-sectional view of the main connection block of the present invention; Figure 6 is a schematic connection structure diagram of the connection housing and the motion expansion disc of the present invention; Figure 7 is a schematic connection structure diagram of the connection housing and the pressure receiving plate of the present invention; Figure 8 is a partial cross-sectional view of the connection housing of the present invention; Figure 9 is a schematic structural diagram of the motion expansion disc of the present invention; Figure 10 is a schematic connection structure diagram of the fixing plate and the traction plate of the present invention.

[0018] In the figure: 1, dynamometer main body; 2, main shaft; 3, main connection block; 4, threaded rod; 5, coarse adjustment handwheel; 6, threaded block; 7, card slot; 8, follower gear; 9, side connection block; 10, connecting shaft; 11, driving gear; 12, fine adjustment handwheel; 13, clamping block; 14, connection housing; 15, positioning groove; 16, positioning post; 17, reset elastic member; 18, positioning block; 19, pressure receiving plate; 20, rack plate; 21, slider; 22, pressure receiving roller; 23, fixing bolt; 24, rotating shaft; 25, transmission gear; 26, motion expansion disc; 27, sliding groove; 28, sliding sleeve; 29, stopper; 30, positioning bolt; 31, extrusion plate; 32, receiving groove; 33, outward pushing elastic member; 34, wedge block; 35, connecting plate; 36, fixing plate; 37, sliding rod; 38, anti-detachment block; 39, traction plate; 40, warning strip; 41, hook block; 42, unfolding elastic member; 43, mounting bolt. DETAILED DESCRIPTION OF THE INVENTION

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0020] Please refer to Figures 1 to 10 , an energy-saving test bench for a high-speed hydraulic dynamometer of an aeroengine, including a dynamometer main body 1, a main shaft 2 is installed in the dynamometer main body 1, a main connecting block 3 is fixedly connected to one side of the dynamometer main body 1, a threaded rod 4 is rotatably connected to the middle position of the main connecting block 3, and the outside of the threaded rod 4 is threadedly connected with a threaded block 6 that is slidably connected to the main connecting block 3. One side of the threaded block 6 away from the main connecting block 3 is fixedly connected with a connecting housing 14. One side of the connecting housing 14 away from the main connecting block 3 is slidably connected with a pressure-receiving plate 19. A pressure-receiving roller 22 is installed on the top of the pressure-receiving plate 19. One side of the pressure-receiving plate 19 away from the main connecting block 3 is fixedly connected with a rack plate 20. One side of the pressure-receiving plate 19 away from the main connecting block 3 is provided with a rotating shaft 24 that is rotatably connected to the connecting housing 14. A transmission gear 25 that meshes with the rack plate 20 is fixedly connected to the middle position of the rotating shaft 24. One end of the rotating shaft 24 is fixedly connected with a motion amplification disc 26. A warning assembly is fixedly connected to one side of the connecting housing 14 away from the main connecting block 3.

[0021] In the energy-saving test bench for a high-speed hydraulic dynamometer of an aeroengine in the present invention, when the coaxiality deviation between the outer shell of the dynamometer main body 1 and the main shaft 2 increases, the main shaft 2 will squeeze the pressure-receiving roller 22, and the pressure-receiving roller 22 will push the pressure-receiving plate 19 downward. The pressure-receiving plate 19 will drive the rack plate 20 downward. When the rack plate 20 moves downward, it will push the transmission gear 25 to rotate, and the transmission gear 25 will drive the motion amplification disc 26 to rotate. Since the diameter of the motion amplification disc 26 is much larger than the diameter of the transmission gear 25, even if the rotation angle of the motion amplification disc 26 is the same as the rotation angle of the transmission gear 25, the operator can more clearly observe that the motion amplification disc 26 has rotated. At the same time, the warning assembly will be deployed after the coaxiality deviation between the outer shell of the dynamometer main body 1 and the main shaft 2 exceeds the range, so that the operator can promptly detect that the coaxiality deviation exceeds the range. In addition, the structure of the dynamometer main body 1 in the present invention is similar to the structure of a sudden load addition and sudden load removal hydraulic dynamometer disclosed in the patent with the patent authorization announcement number CN217384712U, so no further elaboration will be made here.

[0022] As a preferred technical solution of the present invention, the warning component includes a connecting plate 35, a fixing plate 36, a sliding rod 37, a traction plate 39, a warning strip 40 and an unfolding elastic member 42. One end of the connecting plate 35 is fixedly connected to the connecting housing 14, and the other end of the connecting plate 35 is fixedly connected to the fixing plate 36. The upper and lower ends of the fixing plate 36 are both slidably connected with the sliding rod 37. One end of the sliding rod 37 is fixedly connected with the traction plate 39. A warning strip 40 is fixedly connected between the traction plate 39 and the fixing plate 36. An unfolding elastic member 42 is sleeved on the end of the sliding rod 37 close to the traction plate 39. One end of the unfolding elastic member 42 is fixedly connected to the fixing plate 36, and the other end of the unfolding elastic member 42 is fixedly connected to the traction plate 39.

[0023] As a preferred technical solution of the present invention, an anti - detachment block 38 is fixedly connected to the end of the sliding rod 37 away from the traction plate 39. A hook - hanging block 41 is fixedly connected to one side of the upper end of the traction plate 39 close to the movement - expanding disc 26. A sliding groove 27 is formed on one side of the movement - expanding disc 26 close to the traction plate 39. A sliding sleeve 28 is slidably connected in the sliding groove 27. A blocking block 29 matching the hook - hanging block 41 is fixedly connected to one side of the sliding sleeve 28 close to the traction plate 39. A positioning bolt 30 is threadedly connected to the sliding sleeve 28, and the end of the positioning bolt 30 abuts against the side wall of the movement - expanding disc 26.

[0024] Specifically, when the coaxiality deviation between the housing of the dynamometer main body 1 and the main shaft 2 increases, the movement - expanding disc 26 will also rotate synchronously. After the coaxiality deviation between the housing of the dynamometer main body 1 and the main shaft 2 exceeds the range, the blocking block 29 on the movement - expanding disc 26 will also disengage from the hook - hanging block 41. After the hook - hanging block 41 loses its restriction, the unfolding elastic member 42 will drive the traction plate 39 to move away from the fixing plate 36, and unfold the folded warning strip 40 through the traction plate 39, making it easier for the operator to notice that the coaxiality deviation between the housing of the dynamometer main body 1 and the main shaft 2 has exceeded the range; meanwhile, the anti - detachment block 38 will restrict the sliding rod 37 to prevent the sliding rod 37 from detaching from the fixing plate 36. And during the debugging process, the positioning bolt 30 can be loosened, and then the sliding sleeve 28 is slid until the blocking block 29 is in a suitable position, and then the positioning bolt 30 is tightened.

[0025] As a preferred technical solution of the present invention, a pressing plate 31 is fixedly connected to one side of the movement - expanding disc 26 close to the main connecting block 3. A receiving groove 32 is formed on one side of the connecting housing 14 close to the main connecting block 3. A wedge - shaped block 34 is slidably connected to one end of the receiving groove 32 close to the movement - expanding disc 26. An outward - pushing elastic member 33 is fixedly connected to the side of the wedge - shaped block 34 away from the movement - expanding disc 26, and the other end of the outward - pushing elastic member 33 is fixedly connected to the end of the receiving groove 32.

[0026] Specifically, during the rotation of the motion expansion disk 26, the pressing plate 31 presses the wedge block 34. When the stop block 29 on the motion expansion disk 26 disengages from the hooking block 41, the pressing plate 31 also passes over the wedge block 34, and the wedge block 34 returns to its original position under the action of the outward pushing elastic member 33, thereby restricting the pressing plate 31 and preventing the motion expansion disk 26 from rotating back to its original position, which may cause the operator to think that the warning component is triggered by a fault.

[0027] As a preferred technical solution of the present invention, a positioning groove 15 is provided inside the connecting housing 14. A positioning block 18 is slidably connected inside the positioning groove 15. A positioning column 16 is slidably connected to the middle position of the positioning block 18. Both ends of the positioning column 16 are fixedly connected to the top and bottom of the positioning groove 15 respectively. A reset elastic member 17 is sleeved on the lower end of the positioning column 16. The upper end of the reset elastic member 17 is fixedly connected to the positioning block 18, and the lower end of the reset elastic member 17 is fixedly connected to the bottom of the positioning groove 15. The positioning block 18 is fixedly connected to the side wall of the pressure receiving plate 19.

[0028] Specifically, under the restriction of the positioning column 16 and the positioning block 18, the pressure receiving plate 19 moves downward along a straight line and is not prone to lateral deviation. And after the coaxiality of the housing of the dynamometer main body 1 and the main shaft 2 is restored to the qualified range after maintenance, it can return to its original position under the action of the reset elastic member 17, reducing the adjustment time.

[0029] As a preferred technical solution of the present invention, a slider 21 is slidably connected to the top of the pressure receiving plate 19. A pressure receiving roller 22 is rotatably connected to the top of the slider 21. A fixing bolt 23 is slidably connected to the upper end of the pressure receiving plate 19. The end of the fixing bolt 23 passes through the pressure receiving plate 19 and the slider 21 and is threadedly connected to the fixing nut.

[0030] Specifically, when the coaxiality deviation exceeds the range, the equipment may be in a working state, and at this time the main shaft 2 is still rotating. At this time, the main shaft 2 presses the pressure receiving roller 22, resulting in a certain degree of wear on the pressure receiving roller 22. And when the wear of the pressure receiving roller 22 exceeds the threshold due to long-term use, the fixing bolt 23 can be removed, and then the slider 21 can be pulled out from the pressure receiving plate 19, so as to repair and replace the pressure receiving roller 22.

[0031] As a preferred technical solution of the present invention, a card slot 7 is provided on one side of the threaded block 6 close to the connecting housing 14. A clamping block 13 is slidably connected inside the card slot 7. The clamping block 13 is fixedly connected to the outer wall of the connecting housing 14. An installation bolt 43 is slidably connected to the threaded block 6. One end of the installation bolt 43 passes through the threaded block 6 and the clamping block 13 and is threadedly connected to the installation nut.

[0032] Specifically, when maintenance is required for components such as the connecting housing 14 and the pressure receiving plate 19, the mounting bolts 43 can be removed, and then the entire connecting housing 14 can be taken off the threaded block 6 to facilitate the maintenance and repair of components such as the connecting housing 14 and the pressure receiving plate 19.

[0033] As a preferred technical solution of the present invention, a side connecting block 9 is fixedly connected to the lower end of one side of the main connecting block 3. A connecting shaft 10 is rotatably connected to the middle position of the side connecting block 9. A fine adjustment handwheel 12 is fixedly connected to the top of the connecting shaft 10. A driving gear 11 is fixedly connected to the bottom of the connecting shaft 10. A coarse adjustment handwheel 5 is fixedly connected to the top of the threaded rod 4. A follower gear 8 meshing with the driving gear 11 is fixedly connected to the bottom of the threaded rod 4. The diameter of the follower gear 8 is larger than the diameter of the driving gear 11.

[0034] Specifically, after the connecting housing 14 is reinstalled on the threaded block 6 after the maintenance is completed, the coarse adjustment handwheel 5 can be rotated first to roughly adjust the distance between the pressure receiving roller 22 and the main shaft 2, and then the fine adjustment handwheel 12 can be rotated for fine adjustment (when the fine adjustment handwheel 12 is rotated, the fine adjustment handwheel 12 will drive the driving gear 11 to rotate through the connecting shaft 10, and the driving gear 11 will in turn push the meshing follower gear 8 to rotate and then drive the threaded rod 4 to rotate through the follower gear 8, causing the threaded block 6 to rise. Since the diameter of the follower gear 8 is much larger than the diameter of the driving gear 11, when the driving gear 11 rotates one circle, the follower gear 8 will only rotate a certain angle, thus achieving fine adjustment), so that the pressure receiving roller 22 and the main shaft 2 maintain a state of contact but not under force.

[0035] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made in these embodiments without departing from the principles and spirit of the present invention.

Claims

1. An energy-saving test bench for a high-speed hydraulic dynamometer of an aircraft engine, comprising a dynamometer body (1), a main shaft (2) being installed in the dynamometer body (1), characterized in that: A main connecting block (3) is fixedly connected to one side of the dynamometer body (1); a threaded rod (4) is rotatably connected to the middle position of the main connecting block (3); an outer thread of the threaded rod (4) is connected to a threaded block (6) slidably connected to the main connecting block (3); a connecting shell (14) is fixedly connected to the side of the threaded block (6) away from the main connecting block (3); a pressure plate (19) is slidably connected to the side of the connecting shell (14) away from the main connecting block (3); a pressure roller is mounted on the top of the pressure plate (19). (22), a rack plate (20) is fixedly connected to the side of the pressure plate (19) away from the main connection block (3), a rotating shaft (24) rotatably connected to the connection housing (14) is provided on the side of the pressure plate (19) away from the main connection block (3), a transmission gear (25) meshing with the rack plate (20) is fixedly connected to the middle position of the rotating shaft (24), a motion enlargement disk (26) is fixedly connected to one end of the rotating shaft (24), and a warning component is fixedly connected to the side of the connection housing (14) away from the main connection block (3).

2. The energy-saving test bench for high-speed hydraulic dynamometer of an aircraft engine according to claim 1, characterized in that: The warning component comprises a connecting plate (35), a fixed plate (36), a sliding rod (37), a traction plate (39), a warning strip (40) and an unfolding elastic member (42); one end of the connecting plate (35) is fixedly connected to the connecting shell (14); the other end of the connecting plate (35) is fixedly connected to the fixed plate (36); the upper end and the lower end of the fixed plate (36) are both slidably connected to the sliding rod (37); one end of the sliding rod (37) is fixedly connected to the traction plate (39); a warning strip (40) is fixedly connected between the traction plate (39) and the fixed plate (36); an unfolding elastic member (42) is sleeved on one end of the sliding rod (37) close to the traction plate (39); one end of the unfolding elastic member (42) is fixedly connected to the fixed plate (36); the other end of the unfolding elastic member (42) is fixedly connected to the traction plate (39).

3. The energy-saving test bench for high-speed hydraulic dynamometer of an aircraft engine according to claim 2, characterized in that: An anti-dropping block (38) is fixedly connected to one end of the slide rod (37) away from the traction plate (39); a hook block (41) is fixedly connected to the upper end of the traction plate (39) on the side close to the motion enlargement plate (26); a slide groove (27) is provided on the side close to the traction plate (39); a slide sleeve (28) is slidably connected in the slide groove (27); a stopper (29) matching the hook block (41) is fixedly connected to the side of the slide sleeve (28) close to the traction plate (39); a positioning bolt (30) is threadedly connected to the slide sleeve (28); an end of the positioning bolt (30) abuts against the side wall of the motion enlargement plate (26).

4. The energy-saving test bench for high-speed hydraulic dynamometer of an aircraft engine according to claim 1, characterized in that: A squeeze plate (31) is fixedly connected to a side of the motion enlargement disk (26) close to the main connection block (3); a receiving groove (32) is provided on a side of the connection housing (14) close to the main connection block (3); a wedge block (34) is slidably connected to one end of the receiving groove (32) close to the motion enlargement disk (26); an outward push elastic member (33) is fixedly connected to a side of the wedge block (34) away from the motion enlargement disk (26); and the other end of the outward push elastic member (33) is fixedly connected to an end of the receiving groove (32).

5. The energy-saving test bench for high-speed hydraulic dynamometer of an aircraft engine according to claim 1, characterized in that: A positioning groove (15) is provided inside the connection shell (14), a positioning block (18) is slidably connected inside the positioning groove (15), a positioning column (16) is slidably connected to the middle position of the positioning block (18), two ends of the positioning column (16) are respectively fixedly connected to the top and bottom of the positioning groove (15), a reset elastic member (17) is sleeved on the lower end of the positioning column (16), the upper end of the reset elastic member (17) is fixedly connected to the positioning block (18), the lower end of the reset elastic member (17) is fixedly connected to the bottom of the positioning groove (15), and the positioning block (18) is fixedly connected to the side wall of the pressure plate (19).

6. The energy-saving test bench for high-speed hydraulic dynamometer of an aircraft engine according to claim 1, characterized in that: The top of the pressure plate (19) is slidably connected to a slider (21), the top of the slider (21) is rotatably connected to a pressure roller (22), the upper end of the pressure plate (19) is slidably connected to a fixing bolt (23), the end of the fixing bolt (23) passes through the pressure plate (19) and the slider (21) and is threadedly connected to a fixing nut.

7. The energy-saving test bench for high-speed hydraulic dynamometer of an aircraft engine according to claim 1, characterized in that: A clamping groove (7) is provided on one side of the threaded block (6) close to the connecting shell (14); a clamping block (13) is slidably connected to the interior of the clamping groove (7); the clamping block (13) is fixedly connected to the outer wall of the connecting shell (14); a mounting bolt (43) is slidably connected to the threaded block (6); one end of the mounting bolt (43) passes through the threaded block (6) and the clamping block (13) and is threadedly connected to a mounting nut.

8. The energy-saving test bench for high-speed hydraulic dynamometer of an aircraft engine according to claim 1, characterized in that: A side connecting block (9) is fixedly connected to the lower end of one side of the main connecting block (3); a connecting shaft (10) is rotatably connected to the middle position of the side connecting block (9); a fine adjustment hand wheel (12) is fixedly connected to the top of the connecting shaft (10); a driving gear (11) is fixedly connected to the bottom of the connecting shaft (10); a coarse adjustment hand wheel (5) is fixedly connected to the top of the threaded rod (4); a follower gear (8) meshing with the driving gear (11) is fixedly connected to the bottom of the threaded rod (4); and the diameter of the follower gear (8) is larger than the diameter of the driving gear (11).

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