Hydraulic winch low-temperature starting performance testing device

Abstract

The invention relates to a hydraulic winch low-temperature starting performance testing device, and belongs to the technical field of hydraulic winch inspection and detection. Comprising a testing box, baffles are symmetrically arranged in the testing box in the width direction of the testing box, a U-shaped adjusting plate is arranged on the two baffles in the length direction of the baffles in a sliding mode, a low-temperature cavity is formed in one side in the testing box through the adjusting plate and the baffles, and an adjustable cavity is formed in the other side through the adjusting plate. According to the invention, the following problems in the detection process of the hydraulic winch in the prior art can be solved: the space size of the low-temperature chamber can be flexibly changed through sliding of the adjusting plate, and the test requirements of different low-temperature working conditions are met; meanwhile, the provided load mechanism is linked with the driving component through weight adjustment of the balancing weight, variable loads can be provided for the hydraulic winch, the working condition of low-temperature on-load starting of the hydraulic winch in actual work is accurately restored, and data distortion is effectively avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hydraulic winch detection, and particularly relates to a low-temperature starting performance testing device for a hydraulic winch. BACKGROUND

[0002] In the research and application of the hydraulic winch, the low-temperature starting performance is a key indicator for measuring the working reliability, especially in the high-cold area or low-temperature working condition, the starting efficiency and the running stability of the hydraulic winch directly affect the operation effect of the whole machine equipment.

[0003] The current low-temperature starting performance test of the hydraulic winch generally adopts a no-load or fixed-load working condition, which leads to a significant deviation of the key parameters such as the starting torque and the running efficiency from the actual working environment, and it is difficult to truly represent the low-temperature starting characteristics and the continuous working performance under the load condition. This easily causes the safety hazards such as the starting failure and the running jam of the hydraulic winch in the actual starting process under the load. In view of the fact that the hydraulic winch needs to cope with the variable load working condition in the actual application, as the core equipment for driving the rotary machine to complete a specific operation by using the hydraulic energy, it is urgent to establish a low-temperature performance testing method based on the variable load working condition, so as to accurately evaluate the working condition adaptability and the reliability.

[0004] A hydraulic pump and motor testing device and a testing method using the device are disclosed in Chinese Patent No. CN106151172B; the device comprises a hydraulic testing system, a measured hydraulic pump or motor and a starting device, the measured hydraulic pump or motor and the starting device are arranged in the hydraulic testing system respectively, and further comprises a normal-temperature room, a low-temperature room and a high-temperature room, the starting device is arranged in the normal-temperature room, the starting device comprises a starting motor, a starting pump, a low-temperature test hydraulic pump and a high-temperature test hydraulic pump, the low-temperature room is internally provided with a low-temperature oil tank and a low-temperature measured hydraulic pump or motor in communication with the low-temperature oil tank, the low-temperature measured hydraulic pump or motor is elastically connected with the corresponding low-temperature test hydraulic pump in the normal-temperature room, the high-temperature room is internally provided with a high-temperature oil tank and a high-temperature measured hydraulic pump or motor in communication with the high-temperature oil tank, the high-temperature measured hydraulic pump or motor is elastically connected with the corresponding high-temperature test hydraulic pump in the normal-temperature room, and the low-temperature test hydraulic pump and the high-temperature test hydraulic pump are connected with the starting pump and the starting motor respectively.

[0005] However, the above testing device still has some deficiencies in the actual use: 1. The hydraulic winch needs to cope with the variable load working condition in the actual application, and these load conditions directly affect the starting torque, the rotating speed, the power and the running stability. However, the existing low-temperature starting performance test generally adopts a no-load working condition, and cannot truly reflect the starting difficulty under the load, the distorted data easily causes the wrong judgment, and further causes the safety hazards.

[0006] 2. Traditional low-temperature testing methods lack the flexibility to adjust the environmental space. While small-space testing solutions can shorten the temperature conditioning time, they can only be adapted to some hydraulic winch specifications; while large-space testing solutions can cover more models, they require a significantly longer temperature conditioning time, resulting in a significant increase in testing costs.

[0007] Therefore, based on the above-mentioned viewpoints, it is of great significance to improve and perfect the testing method for the low-temperature starting performance of hydraulic winches. The improved testing method should not only be able to flexibly adjust the size of the test space in the low-temperature environment, but also be able to add tests with varying loads to simulate actual working conditions and ensure the validity of the test data. Summary of the Invention

[0008] To address the aforementioned issues, this invention provides a hydraulic winch low-temperature starting performance testing device, comprising a test chamber. Inside the test chamber, baffles are symmetrically arranged along its width direction. U-shaped adjustment plates are slidably arranged on both baffles along their length direction. One side of the test chamber is separated from the baffles by the adjustment plates, forming a low-temperature chamber, while the other side is separated from the baffles by the adjustment plates, forming an adjustable chamber.

[0009] The low-temperature chamber is equipped with a guide rail extending to the outside of the test chamber, and a gate is provided on one side of the test chamber. A clamping mechanism is slidably mounted on the guide rail.

[0010] The inner wall of the low-temperature chamber is equipped with bent low-temperature pipes with multiple cold air outlets. An oil tank is installed inside the adjustable chamber.

[0011] Preferably, an oil passage block is provided on the side of the low-temperature chamber away from the gate. The oil passage block is provided with an oil outlet and an oil inlet. An oil inlet pipe and a return pipe connected to the oil tank are installed thereon. The oil inlet pipe and the return pipe are connected to the oil outlet and the oil inlet respectively through quick-connect couplings.

[0012] Preferably, the oil inlet pipe passes through a cryogenic pipeline and is connected to the oil inlet.

[0013] Preferably, the clamping mechanism includes a clamping block, which is disposed on a guide rail. A groove is provided on the clamping block, and a clamping plate is slidably disposed in the groove along its length via a spring rod.

[0014] Preferably, the cryogenic chamber is further provided with a load mechanism, which includes support structures symmetrically installed on one side of the cryogenic chamber, a load-bearing plate slidably disposed between the two support structures, a connecting plate installed at the top between the two support structures, and the connecting plate and the load-bearing plate connected by a connecting rod.

[0015] Limiting posts are installed on the load-bearing plate, and multiple counterweights are fitted on the limiting posts.

[0016] Preferably, the low-temperature chamber is further provided with a drive component for controlling the lifting and lowering of the connecting plate. The drive component includes a lifting plate that is slidably disposed on the side wall of the test chamber. An active roller is rotatably mounted on the lifting plate. A driven roller is rotatably mounted on the top of the two support structures through a support rod. A traction rope is wound around the active roller.

[0017] Preferably, the end of the traction rope furthest from the driving roller is wrapped around the driven roller and connected to the connecting plate.

[0018] Multiple guide rollers are also installed on the baffle, and the traction rope passes around the auxiliary shaft and connects to the connecting plate.

[0019] Preferably, a coupling is rotatably installed at the bottom of the lifting plate. The coupling is coaxially connected to the drive roller, and a linkage shaft is snapped onto the coupling. The linkage shaft has a slot.

[0020] Preferably, a second screw is rotatably mounted on the test chamber, passing through the low-temperature chamber, and the second screw is threadedly connected to the lifting plate.

[0021] Preferably, the test chamber is also equipped with an adjustment component to improve the air exchange efficiency between the low-temperature chamber and the adjustable chamber. The adjustment component includes a rotating plate, which is rotatably mounted at the bottom of the adjustment plate via a mounting shaft. Adjustment columns are mounted at both ends of the mounting shaft via torsion springs.

[0022] Preferably, the test chamber is equipped with a fitting component for controlling the rotation of the adjusting column. The fitting component includes a fitting plate. A fitting groove is opened inside the test chamber. The fitting plate is slidably set in the fitting groove along the height direction of the fitting groove by a spring rod. A semi-circular fitting block is installed on the adjusting column. Multiple positioning grooves are opened at equal intervals on the fitting plate. The sides of the positioning grooves are inclined inward from top to bottom.

[0023] A control shaft is installed on the mating block. A spiral groove is also opened on the inner wall of the test chamber above the mating groove. The control shaft is slidably set in the spiral groove. Multiple through grooves communicating with it are opened on the inner side of the spiral groove. The through grooves correspond to the positioning groove.

[0024] In summary, this application includes at least one of the following beneficial technical effects: I. This invention allows for flexible adjustment of the volume of the low-temperature chamber through the sliding adjustment of the adjustment plate. Combined with the cold air delivery through the low-temperature pipeline, it achieves efficient and rapid cooling, quickly reaches and stably maintains the target low temperature, and meets the testing requirements of various low-temperature working conditions.

[0025] Second, the load mechanism equipped in this invention can provide a variable load for the hydraulic winch by adjusting the weight of the counterweight and linking it with the drive components, accurately replicating the working condition of the hydraulic winch starting under low temperature load in actual operation. Attached Figure Description

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0028] Figure 2 This is a schematic diagram showing the position of the adjustment plate of the present invention.

[0029] Figure 3 This is a schematic diagram of the internal structure of the test chamber of this invention.

[0030] Figure 4 This is a schematic diagram of the structure between the bidirectional screw, control gear, control rack, and clamping mechanism of the present invention.

[0031] Figure 5 This is a schematic diagram of a portion of the structure of the fuel tank of the present invention.

[0032] Figure 6 This is a schematic diagram of the structure between the load mechanism and the drive component of the present invention.

[0033] Figure 7 This is a partial structural schematic diagram of the driving component of the present invention.

[0034] Figure 8 This is a schematic diagram of the structure of the adjusting component of the present invention.

[0035] Figure 9 This is a schematic diagram of a portion of the structure of the present invention.

[0036] Figure 10 This is the present invention. Figure 9 Enlarged view of point A in the middle.

[0037] In the diagram, 1. Test chamber; 10. Baffle; 11. Adjusting plate; 12. Low-temperature chamber; 13. Adjustable chamber; 20. Guide rail; 21. Gate; 3. Clamping mechanism; 30. Clamping block; 31. Clamping plate; 40. Low-temperature pipeline; 41. Cold air outlet; 42. Oil tank; 43. Oil circuit block; 44. Oil outlet; 45. Oil inlet; 46. Oil inlet pipe; 47. Oil return pipe; 5. Loading mechanism; 50. Support structure; 51. Load-bearing plate; 52. Connecting plate; 53. Limiting device. 54. Column; 55. Counterweight; 66. Second screw; 77. Drive component; 88. Lifting plate; 99. Driving roller; 10. Driven roller; 11. Traction rope; 12. Guide roller; 13. Coupling; 14. Linkage shaft; 15. Slot; 16. Adjusting component; 17. Rotating plate; 18. Adjusting column; 19. Mating component; 20. Mating plate; 21. Mating block; 22. Positioning slot; 33. Control shaft; 44. Back groove; 55. Bidirectional screw; 66. Control gear; 77. Control rack. Detailed Implementation

[0038] The following combination Figures 1-10The embodiments of the present invention will be described in detail below.

[0039] This application discloses a low-temperature starting performance testing device for hydraulic winches. This invention is mainly used in the testing process of the low-temperature starting performance of hydraulic winches, enabling flexible adjustment of the low-temperature testing space and rapid cooling. Furthermore, this invention can effectively simulate the load-bearing starting conditions of hydraulic winches in low-temperature environments, thus more realistically reflecting their actual working performance.

[0040] Example 1: Reference Figure 1 , Figure 2 and Figure 3 As shown, a low-temperature starting performance testing device for a hydraulic winch includes a test chamber 1. Inside the test chamber 1, baffles 10 are symmetrically arranged along its width. U-shaped adjusting plates 11 are slidably arranged on both baffles 10 along their length. A low-temperature chamber 12 is separated from the baffles 10 on one side of the test chamber 1 by the adjusting plates 11, and an adjustable chamber 13 is separated from the baffles 10 on the other side by the adjusting plates 11. Initially, the hydraulic winch is placed inside the low-temperature chamber 12 for low-temperature testing. To improve heat exchange efficiency, a heating plate (not shown in the figure) can be installed inside the adjustable chamber 13.

[0041] By controlling the sliding of the regulating plate 11 inside the test chamber 1, when delivering cold air into the low-temperature chamber 12, the space between the regulating plate 11 and the baffle 10 is reduced, thereby driving the space of the low-temperature chamber 12 to become smaller, which can achieve rapid cooling and improve detection efficiency.

[0042] After the low-temperature test is completed, the air inside the low-temperature chamber 12 is exchanged with the air inside the adjustable chamber 13. When it is clearly detected that the temperature inside the low-temperature chamber 12 is too low and affects the normal operation of the hydraulic winch, the temperature inside the low-temperature chamber 12 is driven to rise rapidly to test the temperature at which the hydraulic winch can return to normal operation.

[0043] The cryogenic chamber 12 is equipped with a guide rail 20 extending to the outside of the test chamber 1. A gate 21 is provided on one side of the test chamber 1. A clamping mechanism 3 is slidably mounted on the guide rail 20. The gate 21 is an existing electric gate 21 that can be raised and lowered. When the gate 21 is opened, it is convenient to send the hydraulic winch for testing into the cryogenic chamber 12 inside the test chamber 1.

[0044] Reference Figure 3 and Figure 5The diagram shows the structure that provides power to the hydraulic winch for testing. Specifically, a bent low-temperature pipe 40 is installed on the inner wall of the low-temperature chamber 12. Multiple cold air outlets 41 are provided on the low-temperature pipe 40. The low-temperature pipe 40 is connected to an existing industrial cooling unit. The cold air output from the industrial cooling unit is transported to the interior of the low-temperature chamber 12 through the cold air outlets 41. The multiple cold air outlets 41 ensure that the transported cold air is evenly distributed. An oil tank 42 is installed inside the adjustable chamber 13. The tank 42 is made of insulation material and is not affected by the heat inside the adjustable chamber 13, maintaining a normal temperature. An oil passage block 43 is provided on the side of the low-temperature chamber 12 away from the gate 21. The oil passage block 43 is provided with an oil outlet 44 and an oil inlet 45. An oil inlet pipe 46 and a return pipe 47 connected to the oil tank 42 are installed. The oil inlet pipe 46 and the return pipe 47 are connected to the oil outlet 44 and the oil inlet 45, respectively.

[0045] A hydraulic pump (not shown in the figure) is installed on the oil tank 42. The input end of the hydraulic pump is connected to the bottom of the oil tank 42 through a pipe, and the output end is connected to the oil inlet pipe 46. The hydraulic pump can transport the hydraulic oil in the oil tank 42 to generate high-pressure oil, which drives the hydraulic winch of the tested hydraulic winch to rotate.

[0046] The outlet 44 and inlet 45 are connected to the pressure oil port and return oil port of the test hydraulic winch respectively by quick-connect couplings. The hydraulic oil circulation of this closed loop provides a power source for the hydraulic winch under test, driving it to run and complete the performance test.

[0047] Reference Figure 5 The diagram shows the structure for controlling the temperature of the oil inlet pipe 46. Specifically, the oil inlet pipe 46 passes through the cryogenic pipe 40 and connects to the oil inlet 45. As the hydraulic oil in the oil inlet pipe 46 passes through the cryogenic pipe 40, its temperature gradually decreases under the influence of the cold air in the hydraulic pipe, gradually approaching the ambient temperature. This simulates the synchronous cooling of hydraulic oil in the actual working environment, ensuring that the temperature of the hydraulic oil remains consistent with the temperature of the cold air, thus guaranteeing the authenticity of the test data.

[0048] Reference Figure 3 and Figure 4 The diagram shows a structural schematic of a hydraulic winch being clamped inside the cryogenic chamber 12. Specifically, the clamping mechanism 3 includes a clamping block 30, which is mounted on the guide rail 20. A groove is formed on the clamping block 30, and a clamping plate 31 is slidably disposed within the groove along its length via a spring rod. The hydraulic winch to be tested is placed between the clamping plates 31 on the clamping block 30 and clamped and fixed under the action of the spring rod. The shape of the opposite side of the clamping block 30 is adapted to the shape of the hydraulic winch, ensuring clamping stability.

[0049] ReferenceFigure 3 and Figure 6 The diagram shows a structural schematic of adding a test load to the test hydraulic winch. Specifically, a load mechanism 5 is also provided inside the cryogenic chamber 12. The load mechanism 5 includes support structure members 50 symmetrically installed on one side of the cryogenic chamber 12. A load-bearing plate 51 is slidably arranged between the two support structure members 50. A connecting plate 52 is installed on the top of the two support structure members 50. The connecting plate 52 is connected to the load-bearing plate 51 through a connecting rod. By controlling the lifting and lowering of the connecting plate 52, the load-bearing plate 51 is lifted and lowered.

[0050] An observation window is provided on the side of the test chamber 1 near the low temperature chamber 12. The observation window is made of glass material that is resistant to temperature changes, so that the testers can observe the test.

[0051] A limit post 53 is provided on the load-bearing plate 51, and multiple counterweights 54 are fitted on the limit post 53. By placing counterweights 54 of different weights, different loads are provided to the hydraulic winch, which simulates the load of the hydraulic winch in actual operation. The number of counterweights 54 is preset in advance. When the number of counterweights 54 needs to be adjusted, it can be manually adjusted by opening the observation window of the test box 1 before each test, simulating the real situation of the hydraulic winch having a load in actual operation, so that the test results are closer to the real situation.

[0052] The cryogenic chamber 12 is also equipped with a drive component 6 that controls the lifting and lowering of the connecting plate 52. The drive component 6 includes a lifting plate 60 that is slidably mounted on the side wall of the test chamber 1. An active roller 61 is rotatably mounted on the lifting plate 60. A driven roller 62 is rotatably mounted on the two support structures 50 via support rods. A traction rope 63 is wound around the active roller 61. By connecting the output shaft of the hydraulic winch to the active roller 61, the active roller 61 is rotated, thereby winding the traction rope 63 around the active roller 61. The traction rope 63 at the other end pulls the connecting plate 52 to lift and lower on the support structure 50, thereby lifting and lowering the hydraulic winch on the load-bearing plate 51. During the hydraulic winch test, a load is added to the output end of the hydraulic winch to simulate actual operation, ensure the authenticity of the test, and improve the accuracy of the test.

[0053] The end of the traction rope 63 away from the driving roller 61 passes around the driven roller 62 and connects to the connecting plate 52.

[0054] Multiple guide rollers 64 are also provided on the baffle 10, and the traction rope 63 passes around the auxiliary shaft and connects to the connecting plate 52. By setting multiple guide rollers 64, it is ensured that the traction rope 63 on the active roller 61 is always kept in the same direction and will not be deformed due to the rotation of the active roller 61. It also ensures that the traction rope 63 can remain taut inside the cryogenic chamber 12, thus ensuring its operational stability.

[0055] Reference Figure 6 and Figure 7 As shown, this is a schematic diagram of the structure connecting the drive roller 61 to the output end of the hydraulic winch; specifically, a coupling 65 is also rotatably installed at the bottom of the lifting plate 60, the coupling 65 is coaxially connected to the drive roller 61, a linkage shaft 66 is snapped onto the coupling 65, and a slot 67 is provided on the linkage shaft 66.

[0056] The slot 67 corresponds to the output shaft of the hydraulic winch being tested. When the hydraulic winch enters the cryogenic chamber 12, the lifting plate 60 is lowered by controlling it, so that the slot 67 on the linkage shaft 66 is inserted into the output shaft of the hydraulic winch. At this time, when the hydraulic winch is working, it can drive the coupling 65 to rotate, and then drive the drive roller 61 to rotate, increasing the load on the output shaft of the hydraulic winch.

[0057] The linkage shaft 66 is snapped into the coupling 65, which facilitates the replacement of different couplings 65 and the installation of different slots 67 to adapt to the testing of hydraulic winches with different output shafts.

[0058] Reference Figure 2 The diagram shows a schematic of the structure that controls the lifting plate 60 to slide along the height direction of the test chamber 1. Specifically, a second screw 55 is rotatably mounted on the test chamber 1, passing through the low-temperature chamber 12, and the second screw 55 is threadedly connected to the lifting plate 60. The second screw 55 is rotated by a motor, thereby causing the lifting plate 60 to slide on the inner wall of the test chamber 1.

[0059] Reference Figure 8 , Figure 9 and Figure 10 The diagram shows a structural schematic of the air exchange between the cryogenic chamber 12 and the adjustable chamber 13. Specifically, the test chamber 1 is also equipped with an adjustment component 7 to improve the air exchange efficiency between the cryogenic chamber 12 and the adjustable chamber 13. The adjustment component 7 includes a rotating plate 70, which is rotatably mounted at the bottom of the adjustment plate 11 via a mounting shaft. Adjustment columns 71 are mounted at both ends of the mounting shaft via torsion springs. When the adjustment plate 11 approaches the oil tank 42, the space of the cryogenic chamber 12 increases, while the space of the adjustable chamber 13 decreases, and the pressure increases. When the rotating plate 70 is opened, the warmer air inside the adjustable chamber 13 enters the cryogenic chamber 12, and the air inside the adjustable chamber 13 exchanges with the air inside the cryogenic chamber 12, thereby increasing the heating rate inside the cryogenic chamber 12.

[0060] Reference Figure 8 , Figure 9 and Figure 10The diagram shows the structure for controlling the rotation of the rotating plate 70. Specifically, the test chamber 1 is equipped with a mating component 8 for controlling the rotation of the adjusting column 71. The mating component 8 includes a mating plate 80. The test chamber 1 has a mating groove. The mating plate 80 is slidably disposed in the mating groove along the height direction of the mating groove via a spring rod. A semi-circular mating block 81 is installed on the adjusting column 71. Multiple positioning grooves 82 are equidistantly provided on the mating plate 80. The sides of the positioning grooves 82 are inclined inward from top to bottom.

[0061] Initially, the mating block 81 is tilted. When the adjusting plate 11 slides closer to the oil tank 42, the mating block 81 will move accordingly. During the movement, the mating block 81 will abut against the mating plate 80. Under the reverse action of the mating plate 80, it will gradually rotate until the plane of the mating block 81 contacts the upper surface of the mating plate 80. At this time, it will cause the adjusting column 71 to rotate, which in turn causes the rotating plate 70 to rotate, allowing the hot air in the adjustable chamber 13 to enter the low-temperature chamber 12.

[0062] Furthermore, the elastic force of the spring rod is greater than that of the torsion spring, ensuring that the mating plate 80 always abuts against the mating block 81.

[0063] A control shaft 83 is installed on the mating block 81. A loop groove 84 is also provided on the inner wall of the test chamber 1 above the mating groove. The control shaft 83 is slidably disposed in the loop groove 84. Multiple through grooves communicating with it are provided on the inner side of the loop groove 84. The through grooves correspond to the positioning groove 82.

[0064] When the mating block 81 moves into the positioning groove 82, the mating block 81 on the adjusting column 71 returns to its initial state under the action of the torsion spring. When the adjusting plate 11 slides away from the oil tank 42, the control shaft 83 on the mating block 81 will move into the loop groove 84. At this time, due to the limitation of the loop groove 84, the mating block 81 will not rotate when it is subjected to the force of the mating plate 80. Then the mating block 81 will push against the mating plate 80 in the opposite direction, driving the mating plate 80 to slide downwards, without affecting the movement of the mating block 81.

[0065] Example 2: Based on Example 1, in order to further increase the stability of the hydraulic winch clamping, a driving component is also proposed, which is beneficial to more effectively clamping and fixing the hydraulic winch during the process of entering the test box 1.

[0066] Reference Figure 3 and Figure 4 The diagram shows a structure for improving the clamping effect of a hydraulic winch. Specifically, a bidirectional screw 90 with one end passing through the clamping block 30 is rotatably installed in the groove, and the clamping plate 31 is symmetrically slidably disposed in the groove and threadedly connected to the bidirectional screw 90.

[0067] A control gear 91 is installed on the side of the bidirectional screw 90 outside the clamping block 30, and a control rack 92 that meshes with the control gear 91 is provided at the bottom of the low temperature chamber 12.

[0068] As the clamping block 30 moves, the control gear 91 gradually approaches the control rack 92, causing the control gear 91 to rotate in the opposite direction. At this time, the bidirectional screw 90 rotates synchronously under the drive of the control gear 91, thereby driving the two clamping plates 31 to move closer to each other. Compared with the method of fixing with a spring rod, this method can prevent loosening when the hydraulic winch vibrates during testing, and the fixing method is more stable.

[0069] During operation: First, the test chamber 1 is separated into a low-temperature chamber 12 and an adjustable chamber 13 by a baffle 10 and an adjusting plate 11. The heating plate of the adjustable chamber 13 works continuously to maintain a high temperature. The low-temperature pipe 40 of the low-temperature chamber 12 is connected to an industrial cooling unit. The oil tank 42 is connected to the oil outlet 44 and oil inlet 45 of the oil circuit block 43 of the low-temperature chamber 12 through the oil inlet pipe 46 and the oil return pipe 47, forming a closed-loop hydraulic oil circuit.

[0070] Step 2: Open the electric gate 21, place the hydraulic winch of the hydraulic winch in the groove of the clamping block 30 on the guide rail 20, and initially fix it by the clamping plate 31.

[0071] Step 3: The adjusting plate 11 slides to reduce the space of the low-temperature chamber 12 and accelerate the cooling. At the same time, the low-temperature pipe 40 delivers cold air through the cold air outlet 41, so that the low-temperature chamber 12 reaches the target low temperature. When the oil inlet pipe 46 passes through the low-temperature pipe 40, the hydraulic oil is cooled by the cold air to the same temperature as the environment. It is connected to the hydraulic winch through the quick connector. The closed loop delivers hydraulic oil to provide power to the hydraulic winch and drive its operation.

[0072] Next, the motor controls the second screw 55 to rotate, driving the lifting plate 60 to descend, so that the slot 67 on the linkage shaft 66 is inserted into the output shaft of the hydraulic winch; when the hydraulic winch rotates, it drives the active roller 61 to rotate, and the traction rope 63 passes around the driven roller 62 and the guide roller 64 to pull the load plate 51. The counterweight 54 applies a load through the connecting rod to simulate the actual working resistance, and the observation window monitors the operating status in real time.

[0073] Step 4: After the low-temperature test is completed, the adjusting plate 11 slides to increase the space of the low-temperature chamber 12 and decrease the space of the adjustable chamber 13, thereby increasing the pressure in the adjustable chamber 13. Through the action of the mating block 81 and the mating plate 80, the rotating plate 70 is driven to rotate and open the channel, allowing hot air from the adjustable chamber 13 to enter the low-temperature chamber 12, rapidly raising the temperature of the low-temperature chamber 12, and detecting the normal operating temperature of the hydraulic winch at different warming stages.

[0074] Step 5: The lifting plate 60 rises to disengage the linkage shaft 66 from the hydraulic winch output shaft, the clamping block 30 moves out, and the gate 21 opens to remove the hydraulic winch; the linkage shaft 66 can be replaced to adapt to different hydraulic winches, and the quick-connect oil inlet pipe 46 and oil return pipe 47 are easy to disassemble, ready for the next test.

[0075] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects.

[0076] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A hydraulic winch low-temperature starting performance testing device, comprising a test chamber (1), characterized in that: Inside the test chamber (1), baffles (10) are symmetrically arranged along its width direction. U-shaped adjustment plates (11) are slidably arranged on the two baffles (10) along their length direction. A low-temperature chamber (12) is separated from the baffles (10) by the adjustment plate (11) on one side of the test chamber (1), and an adjustable chamber (13) is separated by the adjustment plate (11) on the other side. A guide rail (20) extending to the outside of the test box (1) is provided in the low temperature chamber (12), a gate (21) is provided on one side of the test box (1), and a clamping mechanism (3) is slidably provided on the guide rail (20). A bent low-temperature pipe (40) is installed on the inner wall of the low-temperature chamber (12), and multiple cold air outlets (41) are opened on the low-temperature pipe (40). An oil tank (42) is installed inside the adjustable chamber (13).

2. The hydraulic winch low-temperature starting performance testing device according to claim 1, characterized in that: An oil passage block (43) is provided on the side of the low-temperature chamber (12) away from the gate (21). An oil outlet (44) and an oil inlet (45) are provided on the oil passage block (43). An oil inlet pipe (46) and a return pipe (47) connected to the oil tank (42) are installed on the oil tank (42). The oil inlet pipe (46) and the return pipe (47) are connected to the oil outlet (44) and the oil inlet (45) respectively through quick-connect couplings. The oil inlet pipe (46) passes through the low-temperature pipe (40) and is connected to the oil inlet (45).

3. The hydraulic winch low-temperature starting performance testing device according to claim 1, characterized in that: The clamping mechanism (3) includes a clamping block (30), which is mounted on the guide rail (20). A groove is provided on the clamping block (30), and a clamping plate (31) is slidably mounted in the groove along its length via a spring rod.

4. The hydraulic winch low-temperature starting performance testing device according to claim 1, characterized in that: The low-temperature chamber (12) is also equipped with a load mechanism (5). The load mechanism (5) includes a support structure (50) symmetrically installed on one side of the low-temperature chamber (12). A load-bearing plate (51) is slidably installed between the two support structures (50). A connecting plate (52) is installed on the top of the two support structures (50). The connecting plate (52) and the load-bearing plate (51) are connected by a connecting rod. A limit post (53) is provided on the load-bearing plate (51), and multiple counterweights (54) are fitted on the limit post (53).

5. The hydraulic winch low-temperature starting performance testing device according to claim 4, characterized in that: The low-temperature chamber (12) is also equipped with a drive component (6) for controlling the lifting of the connecting plate (52). The drive component (6) includes a lifting plate (60) that is slidably set on the side wall of the test chamber (1). An active roller (61) is rotatably installed on the lifting plate (60). A driven roller (62) is rotatably installed above the two support structures (50) through a support rod. A traction rope (63) is wound around the active roller (61).

6. The hydraulic winch low-temperature starting performance testing device according to claim 5, characterized in that: The traction rope (63) at the end away from the driving roller (61) passes around the driven roller (62) and connects to the connecting plate (52); Multiple guide rollers (64) are also provided on the baffle (10), and the traction rope (63) passes around the auxiliary shaft and connects to the connecting plate (52).

7. The hydraulic winch low-temperature starting performance testing device according to claim 6, characterized in that: A coupling (65) is also rotatably installed at the bottom of the lifting plate (60). The coupling (65) is coaxially connected to the drive roller (61). A linkage shaft (66) is snapped onto the coupling (65), and a slot (67) is provided on the linkage shaft (66).

8. The hydraulic winch low-temperature starting performance testing device according to claim 5, characterized in that: The test chamber (1) is rotatably equipped with a second screw (55) that passes through the low temperature chamber (12), and the second screw (55) is threadedly connected to the lifting plate (60).

9. The hydraulic winch low-temperature starting performance testing device according to claim 1, characterized in that: The test chamber (1) is also equipped with an adjustment component (7) to improve the air exchange efficiency between the low temperature chamber (12) and the adjustable chamber (13). The adjustment component (7) includes a rotating plate (70). The rotating plate (70) is rotatably mounted at the bottom of the adjustment plate (11) via a mounting shaft. Adjustment columns (71) are provided at both ends of the mounting shaft via torsion springs.

10. A hydraulic winch low-temperature starting performance testing device according to claim 9, characterized in that: The test box (1) is equipped with a fitting component (8) for controlling the rotation of the adjusting column (71). The fitting component (8) includes a fitting plate (80). The test box (1) has a fitting groove. The fitting plate (80) is slidably set in the fitting groove along the height direction of the fitting groove by a spring rod. A semi-circular fitting block (81) is installed on the adjusting column (71). Multiple positioning grooves (82) are equidistantly set on the fitting plate (80). The side of the positioning groove (82) is inclined inward from top to bottom. A control shaft (83) is installed on the mating block (81). A spiral groove (84) is also provided on the inner wall of the test box (1) above the mating groove. The control shaft (83) is slidably disposed in the spiral groove (84). Multiple through grooves communicating with it are provided on the inner side of the spiral groove (84). The through grooves correspond to the positioning groove (82).

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