Hydraulic dynamometer for testing power output of underwater engine

Abstract

The invention relates to the technical field of hydraulic dynamometers, in particular to a hydraulic dynamometer for testing power output of an underwater engine, a positioning base is fixedly mounted on the upper end face of the rear side of a testing base, a driving motor is mounted at the top end of the positioning base, and a torque sensor is mounted on a front-end rotating shaft of the driving motor; a connecting shaft is installed at the front end of the torque sensor, a coupler is installed at the front end of the connecting shaft, a sliding base located on the front side of the coupler is slidably installed at the upper end of the testing base, a power measuring base is arranged at the upper end of the sliding base, a semicircular opening is formed in the upper end of the power measuring base, and a semicircular shell is fixedly installed in the semicircular opening. A left arc-shaped clamping plate and a right arc-shaped clamping plate are installed in the semicircular shell in a sliding mode, a locking component is arranged between the left arc-shaped clamping plate and the right arc-shaped clamping plate, and a hydraulic dynamometer is arranged in the semicircular opening. The torque value of the hydraulic dynamometer can be displayed, so that the test precision is improved, the measurement accuracy is ensured, and the reliability of a test result is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic dynamometers, and in particular to a hydraulic dynamometer used for underwater engine power output testing. Background Art

[0002] With the independent research and development of domestic underwater weapons / civilian engines, it is necessary to carry out various tests such as product performance development, calibration, matching, simulation, reliability and durability, and conduct simulated engine power performance tests on underwater weapons / civilian engines on the test bench through power loading devices; hydraulic dynamometers, as important equipment for measuring engine power performance, can be used in conjunction with engines to carry out various operating point transformation tests, and have the advantages of low unit cost, compact size, small inertia, fast transient response, and large load absorption; hydraulic dynamometers need to be calibrated and verified during the production process. During the calibration and verification process, the hydraulic dynamometer is generally placed directly on the support seat for positioning verification, and the hydraulic dynamometer cannot be effectively fixed, which affects the normal calibration and verification.

[0003] For example, Chinese patent (CN217276664U) discloses a hydraulic dynamometer calibration device, which includes a drive motor, a torque sensor, a connecting shaft, a coupling and a hydraulic dynamometer which are coaxially arranged in sequence on the upper end of a workbench. The outer end of the hydraulic dynamometer is provided with a hydraulic dynamometer bracket fixedly connected to the upper side of the workbench. The hydraulic dynamometer passes through the interior of the hydraulic dynamometer bracket, and the bottom side of the interior of the hydraulic dynamometer bracket is provided with an arc groove adapted to the lower end of the hydraulic dynamometer. The upper end bolt of the hydraulic dynamometer bracket passes through an adjusting bolt, and the lower end bearing of the adjusting bolt is connected to a clamping plate adapted to the upper end of the hydraulic dynamometer.

[0004] The above patent clamps and fixes the hydraulic dynamometer by adjusting bolts and clamping plates to prevent the hydraulic dynamometer from being unstable and affecting the normal calibration and verification of the hydraulic dynamometer. However, when the hydraulic dynamometer is fixed by adjusting bolts and clamping plates, the fixing effect is not good, resulting in shaking during the calibration of the hydraulic dynamometer, affecting the test accuracy. In addition, vibration occurs during the calibration of the hydraulic dynamometer, which affects the test results of the hydraulic dynamometer. At the same time, it cannot meet the calibration needs of various models of hydraulic dynamometers.

[0005] Therefore, the present invention provides a hydraulic dynamometer for underwater engine power output testing to solve the above problems. Summary of the invention

[0006] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a hydraulic dynamometer for underwater engine power output testing, which effectively solves the problem that when the hydraulic dynamometer is fixed using adjusting bolts and clamping plates, the fixing effect is poor, resulting in shaking during the hydraulic dynamometer calibration and vibration during the hydraulic dynamometer calibration, which affects the detection results of the hydraulic dynamometer.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is: A hydraulic dynamometer for underwater engine power output testing comprises a test base and a positioning base, wherein the positioning base is fixedly installed on the upper end surface of the rear side of the test base, a driving motor is installed on the top of the positioning base, a torque sensor is installed on the front end rotating shaft of the driving motor, a connecting shaft is installed on the front end of the torque sensor, a coupling is installed on the front end of the connecting shaft, a sliding base located in the front side of the coupling is slidably installed on the upper end of the test base, a dynamometer seat is provided on the upper end of the sliding base, a semicircular opening is opened on the upper end of the dynamometer seat, a semicircular shell is fixedly installed inside the semicircular opening, a left arc-shaped clamping plate and a right arc-shaped clamping plate are slidably installed inside the semicircular shell, a locking component is provided between the left arc-shaped clamping plate and the right arc-shaped clamping plate, and a hydraulic dynamometer is provided inside the semicircular opening.

[0008] Preferably, a slider penetrating the sliding base is fixedly installed on the bottom end of the dynamometer seat, a shock-absorbing spring is fixedly installed between the top of the sliding base and the bottom end of the dynamometer seat, bolt plates are fixedly installed on the left and right ends of the dynamometer seat, and fastening bolts are respectively installed on the two bolt plates.

[0009] Preferably, the locking component includes an insertion cavity opened at the top of the left arc-shaped clamping plate, a sliding pressure plate is slidably installed inside the insertion cavity, an insertion rod is fixedly installed at the bottom end of the sliding pressure plate, a pressure spring is fixedly installed at the top of the sliding pressure plate, a pull rod passing through the left arc-shaped clamping plate is fixedly installed on the top of the sliding pressure plate, an insertion plate is fixedly installed at the top of the right arc-shaped clamping plate, and a slot is opened on the top surface of the insertion plate.

[0010] Preferably, a left arc hole and a right arc hole are respectively opened at the front and rear ends of the semicircular shell, a left rack is fixedly installed at the front and rear ends of the left arc-shaped clamping plate, a right rack is fixedly installed at the front and rear ends of the right arc-shaped clamping plate, a left arc bar and a right arc bar are fixedly installed at the front and rear ends of the semicircular shell, a driving gear is rotatably installed at the front and rear ends of the semicircular shell, a linkage gear is coaxially fixedly installed on the driving gear on the front side, a driving gear meshing with the linkage gear is rotatably installed at the front end of the dynamometer seat, and a first crank handle is installed on the driving gear.

[0011] Preferably, fixed blocks are fixedly installed on the left and right ends of the test base, an adjusting screw that passes through the sliding base is rotatably installed on the fixed block on the left, and a guide rod that passes through the sliding base is fixedly installed on the fixed block on the right.

[0012] Preferably, the left arc-shaped clamping plate and the right arc-shaped clamping plate are respectively provided with arc-shaped openings, the insides of the two arc-shaped openings are respectively fixedly installed with arc-shaped plates, a plurality of pressure columns are respectively slidably installed on the two arc-shaped plates, elastic plates are respectively installed between the outer sides of the plurality of pressure columns on the same side, expansion boxes are respectively installed on the outer ends of the two elastic plates, liquid cavities are respectively provided on the left and right ends of the dynamometer seat, liquid boxes are respectively installed inside the two liquid cavities, liquid tubes are installed between the two liquid boxes and the expansion boxes on the same side, extension plates are respectively fixedly installed on the left and right ends of the dynamometer seat, and hydraulic telescopic rods are respectively installed on the two extension plates.

[0013] Preferably, the front end thread of the dynamometer seat is provided with two locking bolts, and a pressure frame is provided between the two locking bolts.

[0014] Preferably, the front and rear ends of the left arc-shaped clamping plate and the right arc-shaped clamping plate are respectively provided with arc-shaped guide grooves, the semicircular shell is fixedly mounted with intercepting blocks located inside the corresponding arc-shaped guide grooves, and the front and rear ends of the sliding base are respectively fixedly mounted with positioning rings.

[0015] Preferably, the test base is provided with a support frame and a controller, and the positioning base is provided with an auxiliary frame and an arc-shaped cover plate.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. Through the coordinated use of the drive motor, torque sensor, connecting shaft and coupling, the controller can display the torque value of the hydraulic dynamometer, thereby improving the test accuracy and ensuring the measurement accuracy, and also extending the life of the equipment and ensuring the reliability of the test results.

[0017] 2. By using the fastening bolts, vibration-damping springs and sliders together, the height position of the hydraulic dynamometer can be stably adjusted to meet the needs of various types of hydraulic dynamometers. The setting of the vibration-damping spring can effectively absorb and reduce vibration, thereby improving the test accuracy.

[0018] 3. Through the coordinated use of the plug plate, the plug cavity, the plug rod, the pressure spring and the pull rod, the left arc-shaped clamping plate and the right arc-shaped clamping plate can limit and fix the hydraulic dynamometer, thereby avoiding disorderly movement of the hydraulic dynamometer during testing.

[0019] 4. Through the coordinated use of the hydraulic telescopic rod, compression bag, liquid box, expansion box, elastic plate and top pressure column, the top pressure column can completely fix and lock the outer end surface of the hydraulic dynamometer, which is beneficial to the stability of the hydraulic dynamometer. At the same time, the extension length of the top pressure column can be controlled according to the actual specifications of the hydraulic dynamometer. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A three-dimensional schematic diagram of the present invention Figure 1 ; Figure 2 A three-dimensional schematic diagram of the present invention Figure 2 ; Figure 3 It is a schematic diagram of the installation position of the hydraulic dynamometer of the present invention; Figure 4 It is a schematic diagram of the installation position of the left arc-shaped clamping plate and the right arc-shaped clamping plate of the present invention; Figure 5 It is a schematic diagram of the structure of the left rack and the right rack of the present invention; Figure 6 It is a schematic diagram of the structure of the dynamometer stand of the present invention; Figure 7 It is a schematic diagram of the arc-shaped opening structure of the present invention; Figure 8 It is a schematic diagram of the semicircular shell structure of the present invention; Fig. 9 It is a schematic diagram of the installation position of the sliding pressure plate of the present invention; Fig.10 It is a cross-sectional schematic diagram of the sliding base and the dynamometer base of the present invention; Fig.11 It is a schematic diagram of a semicircular shell and an expansion box of the present invention; Fig.12 For the present invention Figure 8 A is an enlarged schematic diagram; Fig.13 For the present invention Fig.10 The enlarged schematic diagram of point B in FIG.

[0021] Markings in the figure: 1. Test base; 2. Positioning base; 3. Drive motor; 4. Torque sensor; 5. Connecting shaft; 6. Coupling; 7. Sliding base; 8. Dynamometer; 9. Semicircular opening; 10. Semicircular shell; 11. Left arc-shaped clamping plate; 12. Right arc-shaped clamping plate; 13. Hydraulic dynamometer; 14. Sliding block; 15. Damping spring; 16. Bolt plate; 17. Fastening bolt; 18. Insertion cavity; 19. Sliding pressure plate; 20. Insertion rod; 21. Pressure spring; 22. Pull rod; 23. Insertion plate; 24. Slot; 25. Left arc-shaped hole; 26. Right arc-shaped hole; 27. Left rack; 28. Right rack; 29 , left arc strip; 30, right arc strip; 31, driving gear; 32, linkage gear; 33, driving gear; 34, first crank handle; 35, fixing block; 36, adjusting screw rod; 37, guide rod; 38, arc mouth; 39, arc plate; 40, top pressure column; 41, elastic plate; 42, expansion box; 43, liquid cavity; 44, liquid box; 45, liquid pipe; 46, extension plate; 47, hydraulic telescopic rod; 48, locking bolt; 49, pressure frame; 50, arc guide groove; 51, interception block; 52, positioning ring; 53, support frame; 54, controller; 55, auxiliary frame; 56, arc cover plate. DETAILED DESCRIPTION

[0022] The following will refer to Figures 1 to 13 Various embodiments of the present invention are described in detail.

[0023] A hydraulic dynamometer for testing the power output of an underwater engine, such as Figure 1 , Figure 6 , Figure 8As shown, it includes a test base 1 and a positioning base 2. The test base 1 is a rectangular parallelepiped structure. The positioning base 2 is fixedly installed on the upper end surface of the rear side of the test base 1. A driving motor 3 is installed on the top of the positioning base 2. The driving motor 3 is used for calibration and verification of the hydraulic dynamometer 13. A torque sensor 4 is installed on the front end shaft of the driving motor 3. A connecting shaft 5 is installed at the front end of the torque sensor 4. A coupling 6 is fixedly installed at the front end of the connecting shaft 5. A sliding base 7 located in front of the coupling 6 is slidably installed on the upper end of the test base 1. The sliding base 7 can be slidably adjusted forward and backward along the test base 1. A dynamometer seat 8 is provided on the upper end of the sliding base 7. A semicircular opening is opened at the upper end of the dynamometer seat 8. 9, a semicircular shell 10 is fixedly installed inside the semicircular opening 9, and the semicircular shell 10 is completely matched with the semicircular opening 9. An arc cavity is opened inside the semicircular shell 10, and the arc cavity runs through the left and right ends of the semicircular shell 10. A left arc splint 11 is slidably installed inside the left side of the semicircular shell 10, and a right arc splint 12 is slidably installed inside the right side of the semicircular shell 10. The left arc splint 11, the right arc splint 12 and the semicircular shell 10 form a circular ring structure when closed. A locking component is arranged between the top ends of the left arc splint 11 and the right arc splint 12. A hydraulic dynamometer 13 is arranged inside the semicircular opening 9, and the drive motor 3 and the torque sensor 4 are connected to the controller 54 through wires, and the controller 54 is connected to the power supply through wires.

[0024] When it is necessary to calibrate and check the hydraulic dynamometer 13, the personnel install the drive motor 3 in the arc-shaped opening at the top of the positioning base 2, and then fix the front end rotating shaft of the drive motor 3 to the rear end shaft of the torque sensor 4, the front end shaft of the torque sensor 4 is fixedly connected to the connecting shaft 5, the front end of the connecting shaft 5 is fixedly connected to the coupling 6, the front end of the coupling 6 is fixedly connected to the rear end shaft of the hydraulic dynamometer 13, turn on the power, and the controller 54 starts the drive motor 3 and the torque sensor 4 to work. The drive motor 3 drives the connecting shaft 5, the coupling 6, and the hydraulic dynamometer 13 to work through the torque sensor 4. The torque sensor 4 transmits the torque value to the controller 54, and the torque value of the hydraulic dynamometer 13 is displayed through the display screen on the controller 54. By correcting the torque value of the hydraulic dynamometer 13, the test accuracy is improved and the measurement accuracy is ensured, and the equipment life can also be extended to ensure the reliability of the test results.

[0025] like Figure 3As shown, two sliders 14 are fixedly installed on the bottom end of the dynamometer seat 8, and two sliding holes are provided on the top end of the sliding base 7. The two sliders 14 are slidably installed inside the two sliding holes up and down. A plurality of damping springs 15 are fixedly installed between the top end of the sliding base 7 and the bottom end of the dynamometer seat 8. One end of the damping spring 15 is fixedly installed on the top end of the sliding base 7, and the other end is fixedly installed on the bottom end of the dynamometer seat 8. Bolt plates 16 are fixedly installed on the left and right ends of the dynamometer seat 8, respectively. Two fastening bolts 17 are rotatably installed on the two bolt plates 16, and the bottom ends of the fastening bolts 17 are threadedly installed on the sliding base 7.

[0026] When it is necessary to adjust the height of the hydraulic dynamometer 13 downward, the fastening bolt 17 is rotated, the dynamometer seat 8 presses the vibration-damping spring 15 to slide downward, and the slider 14 slides downward along the sliding hole, and the vibration-damping spring 15 gives the dynamometer seat 8 a rebound force upward, which is beneficial to the stability of the dynamometer seat 8; when it is necessary to adjust the height of the hydraulic dynamometer 13 upward, the fastening bolt 17 is rotated in the opposite direction, the vibration-damping spring 15 pushes the dynamometer seat 8 to slide upward, and the slider 14 slides upward along the sliding hole, and the vibration-damping spring 15 gives the dynamometer seat 8 a rebound force upward, which is beneficial to the stability of the dynamometer seat 8. By setting the fastening bolt 17, the height position of the hydraulic dynamometer 13 can be stably adjusted to meet the needs of various types of hydraulic dynamometers 13. When the hydraulic dynamometer 13 vibrates, the vibration-damping spring 15 can effectively absorb and reduce the vibration, thereby improving the test accuracy.

[0027] like Figure 7 , Figure 8 , Fig. 9 , Fig.13 As shown, the locking component includes an insertion cavity 18 opened at the top of the left arc-shaped clamping plate 11, and the insertion cavity 18 is arranged on the right side of the top of the left arc-shaped clamping plate 11. A sliding pressure plate 19 is installed in the insertion cavity 18 so as to slide up and down. The sliding pressure plate 19 can only slide up and down along the insertion cavity 18. Three insertion rods 20 are fixedly installed at the bottom end of the sliding pressure plate 19. The bottom end of the insertion rod 20 is a round surface. A plurality of pressure springs 21 are fixedly installed at the top of the sliding pressure plate 19. Five pressure springs are arranged here. Spring 21, the top of the pressure spring 21 is fixedly installed on the top of the insertion cavity 18, and a pull rod 22 that passes through the left arc-shaped clamping plate 11 is fixedly installed on the top of the sliding pressure plate 19. The pull rod 22 is a U-shaped rod, and both ends of the pull rod 22 are fixedly installed on the two ends of the sliding pressure plate 19, and the pull rod 22 can slide up and down along the left arc-shaped clamping plate 11. A plug-in plate 23 is fixedly installed on the left side of the top of the right arc-shaped clamping plate 12, and a slot 24 is opened on the top surface of the plug-in plate 23, and the left end of the plug-in plate 23 is a round surface.

[0028] The personnel places the hydraulic dynamometer 13 inside the semicircular opening 9, and then drives the left arc-shaped clamping plate 11 and the right arc-shaped clamping plate 12 to slowly approach each other, and the plug plate 23 is inserted into the insertion cavity 18. The circular surface of the plug plate 23 contacts the circular surfaces of multiple plug rods 20. When the plug plate 23 continues to approach the insertion cavity 18, the circular surface of the plug rod 20 will slide upward along the top surface of the plug plate 23. At the same time, the pressure spring 21 is compressed and the pull rod 22 slides upward until multiple plug rods 20 are inserted into the interior of the slot 24, thereby realizing the left arc-shaped clamping plate 11 and the right arc-shaped clamping plate 12 to limit and fix the hydraulic dynamometer 13, avoiding the hydraulic dynamometer 13 from moving around during testing. Because the pressure spring 21 pushes the sliding pressure plate 19 and the plug rod 20 to be inserted into the interior of the slot 24, the hydraulic dynamometer 13 is more stable during testing.

[0029] When the hydraulic dynamometer 13 needs to be disassembled, the pull rod 22 is pulled upward, the sliding pressure plate 19 presses the pressure spring 21 and the insertion rod 20 out of the slot 24, and the hydraulic dynamometer 13 can be removed.

[0030] like Figure 4 , Figure 5 , Figure 7 , Figure 8 , as shown, a right arc-shaped hole 26 is penetrated at the front and rear right side of the front end of the semicircular shell 10, and a left arc-shaped hole 25 is penetrated at the front and rear left side of the front end of the semicircular shell 10. The left arc-shaped hole 25 is arranged above the right arc-shaped hole 26. The left rack 27 is fixedly installed on the front and rear bottom ends of the left arc-shaped clamping plate 11 through extension blocks, respectively. The extension blocks are slidably installed in the corresponding left arc-shaped holes 25. The left end of the left rack 27 is flush with the extension block. The right rack 28 is fixedly installed on the front and rear bottom ends of the right arc-shaped clamping plate 12 through extension rods, respectively. The extension rods are slidably installed on the corresponding Inside the right arc hole 26, the right end of the right rack 28 is flush with the extension rod, the front and rear ends of the semicircular shell 10 are respectively fixedly installed with a left arc bar 29 and a right arc bar 30, and the front and rear ends of the semicircular shell 10 are respectively rotatably installed with a driving gear 31, the driving gear 31 is meshed and connected with the left rack 27 and the right rack 28 on the same side, and a linkage gear 32 is coaxially fixedly installed on the front driving gear 31, and a driving gear 33 meshed with the linkage gear 32 is rotatably installed at the front end of the dynamometer 8, and a first crank handle 34 is installed on the driving gear 33.

[0031] When the left arc-shaped clamping plate 11 and the right arc-shaped clamping plate 12 need to be quickly closed, the first crank handle 34 is manually driven to rotate, the driving gear 33 meshes with the linkage gear 32 to rotate, and the driving gear 31 meshes with the left rack 27 and the right rack 28 on the same side to slide synchronously until the left arc-shaped clamping plate 11 and the right arc-shaped clamping plate 12 are closed to wrap the hydraulic dynamometer 13, which can prevent the hydraulic dynamometer 13 from moving around during testing, and also facilitates the operation of personnel and improves the convenience of operation.

[0032] like Figure 1 As shown, two fixed blocks 35 are fixedly installed on the left and right ends of the test base 1, an adjusting screw 36 is rotatably installed between the two fixed blocks 35 on the left, and the adjusting screw 36 is threadedly connected to the sliding base 7, and a guide rod 37 is fixedly installed between the two fixed blocks 35 on the right, and the guide rod 37 slides back and forth and penetrates the sliding base 7, a left-right symmetrical sliding groove is opened at the upper front end of the sliding base 7, a moving block located in the sliding groove is fixedly installed on the bottom end of the sliding base 7, and a second crank handle is coaxially fixedly installed at the front end of the adjusting screw 36.

[0033] When the position of the hydraulic dynamometer 13 needs to be adjusted, the second crank handle and the adjusting screw 36 are rotated, and the sliding base 7 slides along the slide groove with the moving block. At the same time, the sliding base 7 slides along the guide rod 37, and the dynamometer seat 8 moves synchronously, thereby adjusting the position of the hydraulic dynamometer 13. This can meet the needs of various models of hydraulic dynamometers 13.

[0034] like Figure 3 , Figure 4 , Figure 5 , Figure 7 , Fig.11 As shown, the left arc-shaped clamping plate 11 and the right arc-shaped clamping plate 12 are respectively provided with arc-shaped openings 38, and the interiors of the two arc-shaped openings 38 are respectively fixedly installed with arc-shaped plates 39, and the inner surfaces of the arc-shaped plates 39 are completely fitted with the inner surfaces of the left arc-shaped clamping plate 11 and the inner surfaces of the right arc-shaped clamping plate 12, and the two arc-shaped plates 39 are respectively evenly provided with a plurality of sliding holes, and a push column 40 is respectively slidably installed inside each of the sliding holes, and a stopper is fixedly installed on the outer end of the push column 40, and the diameter of the stopper is larger than the diameter of the push column 40, and a return spring is respectively sleeved on each of the push column 40, one end of the return spring is fixedly installed on the arc-shaped plate 39, and the other end is fixedly installed on the stopper, and elastic plates 41 are respectively slidably installed inside the two arc-shaped openings 38, and due to the rebound force of the return spring, each stopper contacts with the inner surface of the elastic plate 41 on the same side.

[0035] The outer ends of the two elastic plates 41 are respectively installed with expansion boxes 42 located inside the arc-shaped opening 38, and the outer end surface of the expansion box 42 is fixedly installed with an arc plate, and the arc plate is fixedly installed on the left arc-shaped clamping plate 11 and the right arc-shaped clamping plate 12. The outer surface of the arc plate is flush with the outer surface of the left arc-shaped clamping plate 11 and the right arc-shaped clamping plate 12. The expansion box 42 is arranged between the arc plate and the elastic plate 41, and the expansion box 42 has the characteristics of compression and reset. The expansion box 42 is made of an existing suitable material. The left and right ends of the dynamometer seat 8 are respectively provided with liquid cavities 43, and the insides of the two liquid cavities 43 are respectively fixedly installed with liquid boxes 44, and the inside of the liquid box 44 is provided with liquid. The liquid Select oil, and a liquid tube 45 is fixedly installed between the two liquid boxes 44 and the expansion box 42 on the same side. The liquid tube 45 is a hose. Extension plates 46 are fixedly installed on the left and right ends of the dynamometer stand 8. The top surface of the extension plate 46 is flush with the bottom surface of the liquid box 44 on the same side. Compression bags are fixedly installed on the two extension plates 46 respectively. The compression bags are connected to the liquid box 44 on the same side, and liquid is arranged inside the compression bags. Hydraulic telescopic rods 47 are fixedly installed on the outer ends of the two extension plates 46 respectively, and push plates are fixedly installed on the telescopic ends of the two hydraulic telescopic rods 47. The push plates are arranged in contact with the compression bags on the same side, and the hydraulic telescopic rods 47 are connected to the controller 54.

[0036] The first crank handle 34 is manually driven to rotate, the active gear 33 meshes with the linkage gear 32 to rotate, the driving gear 31 meshes with the left rack 27 and the right rack 28 on the same side to slide synchronously, and then the left arc-shaped splint 11 and the right arc-shaped splint 12 slowly approach each other, the plug-in plate 23 is inserted into the insertion cavity 18, and the round surface of the plug-in rod 20 will slide upward along the top surface of the plug-in plate 23. At the same time, the pressure spring 21 is compressed and the pull rod 22 slides upward until multiple plug-in rods 20 are inserted into the interior of the slot 24, thereby realizing the wrapping of the hydraulic dynamometer 13 by the left arc-shaped splint 11 and the right arc-shaped splint 12.

[0037] The controller 54 starts the two hydraulic telescopic rods 47 to compress the compression bag through the push plate. The hydraulic pressure in the compression bag quickly enters the corresponding liquid box 44. The liquid in the liquid box 44 quickly enters the expansion box 42 through the liquid tube 45. The expansion box 42 gradually expands and pushes the corresponding elastic plate 41 to slide. The elastic plate 41 pushes the multiple blocks and the top pressure column 40 on the same side to approach the hydraulic dynamometer 13, and the reset spring is compressed. When the inner end of the top pressure column 40 is completely in contact with the outer end surface of the hydraulic dynamometer 13 with force, the controller 54 stops the movement of the hydraulic telescopic rod 47 at this time, and the multiple top pressure columns 40 on the same side are completely fixed and locked to the outer end surface of the hydraulic dynamometer 13, which is beneficial to the stability of the hydraulic dynamometer 13. Since the hydraulic telescopic rod 47 has the advantages of high stability and high reliability, it can provide better clamping force for the hydraulic dynamometer 13, and can also meet the needs of hydraulic dynamometers 13 of various specifications.

[0038] When the hydraulic dynamometer 13 needs to be disassembled, the controller 54 starts the two hydraulic telescopic rods 47 to contract, and the two compression bags gradually expand outward. The liquid inside the liquid box 44 is sucked into the interior of the compression bag, and the liquid inside the expansion box 42 enters the interior of the liquid box 44 through the liquid tube 45. The reset spring rebounds and resets the top pressure column 40. Then, the pull rod 22 is manually pulled upward, and the sliding pressure plate 19 presses the pressure spring 21 and takes the insertion rod 20 out of the slot 24. Finally, the left arc-shaped splint 11 and the right arc-shaped splint 12 are respectively closed to the interior of the semicircular shell 10.

[0039] like Figure 3 As shown, the front end thread of the dynamometer seat 8 is equipped with two locking bolts 48, a pressure frame 49 is sleeved between the two locking bolts 48, a pressure plate is fixedly installed in the middle of the pressure frame 49, and the pressure plate is arranged at the front end of the hydraulic dynamometer 13. In order to make the hydraulic dynamometer 13 more stable during testing, the personnel rotate the two locking bolts 48 to move backward, and at the same time, the two locking bolts 48 move synchronously with the pressure frame 49, and finally the pressure plate presses the front end surface of the hydraulic dynamometer 13, so as to avoid the hydraulic dynamometer 13 from shaking forward during the testing process, thereby further improving the stability of the test.

[0040] like Figure 8 , Fig.12 As shown, arc guide grooves 50 are respectively opened on the front and rear end surfaces of the left arc splint 11 and the right arc splint 12, and the two ends of the arc guide grooves 50 are in a non-through state. An intercepting block 51 located inside the corresponding arc guide groove 50 is fixedly installed on the semicircular shell 10, and the intercepting block 51 can slide freely along the arc guide groove 50, which is beneficial to improve the stability of the left arc splint 11 and the right arc splint 12 when sliding. Positioning rings 52 are respectively fixedly installed on the front and rear end surfaces of the sliding base 7, and the left arc bar 29 and the right arc bar 30 are respectively fixedly installed on the inner end surfaces of the positioning ring 52.

[0041] like Figure 1 As shown, a support frame 53 is fixedly installed on the top surface of the test base 1, the torque sensor 4 is installed on the support frame 53 by bolts, the controller 54 is fixedly installed on the positioning base 2, and an auxiliary frame 55 is fixedly installed on the front end of the positioning base 2. The rotating shaft of the driving motor 3 is rotatably installed on the auxiliary frame 55, and an arc cover plate 56 covers the outer shell of the driving motor 3. The bolts pass through the arc cover plate 56 and are finally threadedly installed on the top of the positioning base 2, which is beneficial to the stability of the driving motor 3.

[0042] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0043] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be fixed installation, detachable connection, or integral connection; it can be mechanical connection or electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be internal communication between two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A hydraulic dynamometer for underwater engine power output testing, comprising a test base (1) and a positioning base (2), characterized in that: A positioning base (2) is fixedly mounted on the upper end surface of the rear side of the test base (1), a driving motor (3) is mounted on the top of the positioning base (2), a torque sensor (4) is mounted on the front end shaft of the driving motor (3), a connecting shaft (5) is mounted on the front end of the torque sensor (4), a coupling (6) is mounted on the front end of the connecting shaft (5), a sliding base (7) located in front of the coupling (6) is slidably mounted on the upper end of the test base (1), a dynamometer seat (8) is provided on the upper end of the sliding base (7), a semicircular opening (9) is opened on the upper end of the dynamometer seat (8), a semicircular shell (10) is fixedly mounted inside the semicircular opening (9), a left arc-shaped clamping plate (11) and a right arc-shaped clamping plate (12) are slidably mounted inside the semicircular shell (10), a locking component is arranged between the left arc-shaped clamping plate (11) and the right arc-shaped clamping plate (12), and a hydraulic dynamometer (13) is arranged inside the semicircular opening (9).

2. A hydraulic dynamometer for underwater engine power output testing according to claim 1, characterized in that: A slider (14) penetrating the sliding base (7) is fixedly mounted on the bottom end of the dynamometer seat (8); a damping spring (15) is fixedly mounted between the top end of the sliding base (7) and the bottom end of the dynamometer seat (8); bolt plates (16) are fixedly mounted on the left and right ends of the dynamometer seat (8), and fastening bolts (17) are respectively mounted on the two bolt plates (16).

3. A hydraulic dynamometer for underwater engine power output testing according to claim 1, characterized in that: The locking component includes an insertion cavity (18) opened at the top end of the left arc-shaped clamp (11), a sliding pressure plate (19) is slidably installed inside the insertion cavity (18), an insertion rod (20) is fixedly installed at the bottom end of the sliding pressure plate (19), a pressure spring (21) is fixedly installed at the top end of the sliding pressure plate (19), a pull rod (22) passing through the left arc-shaped clamp (11) is fixedly installed on the top end of the sliding pressure plate (19), and an insertion plate (23) is fixedly installed at the top end of the right arc-shaped clamp (12), and a slot (24) is opened on the top surface of the insertion plate (23).

4. A hydraulic dynamometer for underwater engine power output testing according to claim 1, characterized in that: The front and rear ends of the semicircular shell (10) are respectively provided with a left arc-shaped hole (25) and a right arc-shaped hole (26); the front and rear ends of the left arc-shaped clamping plate (11) are respectively fixedly mounted with a left rack (27); the front and rear ends of the right arc-shaped clamping plate (12) are respectively fixedly mounted with a right rack (28); the front and rear ends of the semicircular shell (10) are respectively fixedly mounted with a left arc-shaped bar (29) and a right arc-shaped bar (30); the front and rear ends of the semicircular shell (10) are respectively rotatably mounted with a driving gear (31); a linkage gear (32) is coaxially fixedly mounted on the front driving gear (31); a driving gear (33) meshing with the linkage gear (32) is rotatably mounted on the front end of the dynamometer seat (8); and a first crank handle (34) is mounted on the driving gear (33).

5. A hydraulic dynamometer for underwater engine power output testing according to claim 1, characterized in that: The left and right ends of the test base (1) are respectively fixedly mounted with fixed blocks (35); an adjusting screw (36) penetrating the sliding base (7) is rotatably mounted on the left fixed block (35); and a guide rod (37) penetrating the sliding base (7) is fixedly mounted on the right fixed block (35).

6. A hydraulic dynamometer for underwater engine power output testing according to claim 1, characterized in that: The left arc-shaped clamping plate (11) and the right arc-shaped clamping plate (12) are respectively provided with an arc-shaped opening (38), and the interior of the two arc-shaped openings (38) is respectively fixedly installed with an arc-shaped contact plate (39), and a plurality of pressure columns (40) are respectively slidably installed on the two arc-shaped contact plates (39), and elastic plates (41) are respectively installed between the outer sides of the plurality of pressure columns (40) located on the same side, and expansion boxes (42) are respectively installed on the outer ends of the two elastic plates (41), and the left and right ends of the dynamometer seat (8) are respectively provided with a liquid cavity (43), and the interior of the two liquid cavities (43) is respectively installed with a liquid box (44), and a liquid tube (45) is installed between the two liquid boxes (44) and the expansion boxes (42) on the same side, and the left and right ends of the dynamometer seat (8) are respectively fixedly installed with an extension plate (46), and the two extension plates (46) are respectively installed with a hydraulic telescopic rod (47).

7. A hydraulic dynamometer for underwater engine power output testing according to claim 4, characterized in that: Two locking bolts (48) are threadedly mounted on the front end of the dynamometer seat (8), and a pressure frame (49) is mounted between the two locking bolts (48).

8. A hydraulic dynamometer for underwater engine power output testing according to claim 4, characterized in that: The left arc-shaped clamping plate (11) and the right arc-shaped clamping plate (12) are respectively provided with arc-shaped guide grooves (50) at their front and rear ends, an interception block (51) located inside the corresponding arc-shaped guide groove (50) is fixedly mounted on the semicircular shell (10), and a positioning ring (52) is respectively fixedly mounted on the front and rear ends of the sliding base (7).

9. A hydraulic dynamometer for underwater engine power output testing according to claim 1, characterized in that: The test base (1) is provided with a support frame (53) and a controller (54), and the positioning base (2) is provided with an auxiliary frame (55) and an arc-shaped cover plate (56).

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