Power unit hydraulic performance test board

Abstract

The invention relates to the technical field of hydraulic testing, and discloses a power unit hydraulic performance test board which comprises a seat stand, a processing panel and a rotary supporting assembly are arranged on the seat stand, a rotatable test cylinder is arranged at the front end of the rotary supporting assembly, a plurality of L-shaped mounting grooves are formed in the periphery of the test cylinder in a circumferential array mode, and the L-shaped mounting grooves are communicated with the processing panel. An adjusting cylinder is arranged in the middle of an inner cavity of the testing cylinder, and a second telescopic cylinder is fixedly connected between the adjusting cylinder and the bottom of the inner cavity of the testing cylinder; the periphery of the testing cylinder is rotatably sleeved with a sealing ring, and a plurality of observation openings are formed in the sealing ring. Through integrated control, installation is convenient and rapid, the testing efficiency is improved, the L-shaped installation groove is conveniently and rapidly sealed after testing, impurities are prevented from influencing installation and testing of the power unit, meanwhile, gas, water rust and corrosion are avoided, the installation precision and the service life are guaranteed, abrasion of the force measuring end is further avoided, the testing precision is improved, and the testing efficiency is improved. And the test comprehensiveness and stability are ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic testing, and particularly relates to a hydraulic performance test bench for a power unit. Background Art

[0002] In recent years, in oil exploitation operations, rotary steerable drilling systems have gradually become a popular steerable drilling technology and one of the key technologies for efficient drilling. The hydraulic power unit in a rotary steerable drilling system is the offset mechanism of the steering system and the only power source for the bit to deflect, which is crucial for the build rate effect and construction safety of the rotary steerable drilling system. Currently, for the research on drilling steering technology, it is necessary to test the hydraulic power unit.

[0003] The invention patent with the publication number CN113702035B discloses a hydraulic power unit test device, belonging to the field of oil drilling engineering, including a support mechanism. The support mechanism includes a base and a mounting shaft provided on the base; a hydraulic power unit mounted on the mounting shaft, which provides hydraulic pressure; a force measuring ring assembly sleeved on the mounting shaft, which receives the pressure applied by the hydraulic power unit; and a data acquisition and control system, which is connected to the hydraulic power unit and controls the hydraulic power of the hydraulic power unit. The data acquisition and control system is also connected to the force measuring ring assembly and acquires the pressure received by the force measuring ring assembly.

[0004] During the use of the hydraulic power unit test device in the above patent, it is necessary to lock the power units one by one into the mounting grooves on the periphery of the mounting shaft, sleeve and lock the support ring with a force measuring part on the periphery of the mounting shaft through a positioning device, and then place the mounting shaft on the rollers of the V-shaped support member, and control the rollers to drive the mounting shaft to rotate to drive each power unit to simulate the working state during rotation. In this process, the installation and disassembly operations before and after the power unit test are relatively cumbersome and inconvenient, affecting the test efficiency of the power unit; after the test, there is a lack of convenient and effective sealing measures for the mounting grooves, impurities are likely to enter the mounting grooves, and it is easy to come into contact with air, water, etc., resulting in rust and corrosion, reducing the installation accuracy and service life, and affecting the test accuracy; when the support ring is sleeved onto the mounting shaft, since the force measuring part cannot contract, the force measuring end of the force measuring part continuously scratches the outer wall of the mounting shaft and the power unit as the support ring moves, easily causing deformation or wear of the contact end of the force measuring part, resulting in a decrease in test accuracy after multiple tests; directly lapping the mounting shaft on the rollers to rotate lacks guarantee of test safety. At the same time, since the power unit only simulates rotating with the steering head during the test and does not simulate actuating in different directions with the steering head, the simulation test of the gravity influence of the power unit in different orientations is not realistic enough, and the test accuracy is low and not comprehensive enough. Summary of the Invention

[0005] The object of the present invention is to solve the problems existing in the use of general hydraulic power unit test devices, such as low test efficiency, lack of effective sealing measures for the installation groove, easy deformation or wear of the force measuring part, low test accuracy and insufficient comprehensiveness. The present invention provides a hydraulic performance test bench for a power unit.

[0006] In order to achieve the above object, the present invention specifically adopts the following technical solutions:

[0007] A hydraulic performance test bench for a power unit, including a base table, a processing panel and a rotary support assembly are arranged on the base table, a test cylinder capable of rotating is arranged at the front end of the rotary support assembly, a number of L-shaped installation grooves arranged in a circumferential array are opened on the periphery of the test cylinder, an adjusting cylinder is arranged in the middle of the inner cavity of the test cylinder, and a second telescopic cylinder is fixedly connected between the adjusting cylinder and the bottom of the inner cavity of the test cylinder;

[0008] A sealing ring is rotatably sleeved on the periphery of the test cylinder, a number of observation ports are opened on the sealing ring, a force measuring sleeve is fixedly connected in the middle of the observation port, a pressure sensor is slidably connected in the force measuring sleeve, the pressure sensor is wirelessly connected with the processing panel, a nail-shaped pipe is rotatably connected to the top of the test cylinder, a number of slots are opened on the periphery of the top of the nail-shaped pipe, an L-shaped elastic pressing plate for fixing the power unit is slidably inserted on the outer wall of the nail-shaped pipe, and the adjusting cylinder is used to adjust the sealing of the L-shaped installation groove and the fixing and pressure measurement of the power unit.

[0009] Further, the rotary support assembly includes a rotating ring rotatably connected to the front wall of the base table, bearing frames are fixedly connected to both the upper and lower sides of the front end of the rotating ring, the test cylinder is rotatably connected between the bearing frames, a driving shaft rod is rotatably connected between the bearing frames, the driving shaft rod is driven by a reduction motor installed on the upper bearing frame, and a transmission belt is movably connected between the bottom of the driving shaft rod and the bottom of the test cylinder.

[0010] Further, a bevel gear sleeve is rotatably sleeved on the driving shaft rod, a friction cone sleeve slidably clamped on the driving shaft rod is arranged at the bottom of the bevel gear sleeve, a friction cone groove adapted to the friction cone sleeve is formed at the bottom of the bevel gear sleeve, a pressing plate is rotatably sleeved at the bottom of the bevel gear sleeve, and a first telescopic cylinder is fixedly connected between the pressing plate and the lower bearing frame;

[0011] A bevel gear ring is fixedly connected to the front wall of the base table, the bevel gear sleeve is meshed with the bevel gear ring, an annular clamping groove is formed at the edge of the front wall of the bevel gear ring, the lower wall of the pressing plate is arc-shaped and is movably abutted against the inner wall of the annular clamping groove, and the pressing plate is movably connected to the left wall of the annular clamping groove.

[0012] Further, on one side edge close to the outer wall of the test cylinder of the L-shaped mounting groove, right-angle edge protrusions for limiting the power unit are symmetrically arranged.

[0013] Further, a downwardly extending edge portion is provided around the top periphery of the nail-shaped tube, and the edge portion is in movable sealing contact with the upper wall of the test cylinder and the upper wall of the upper bearing bracket, and the sealing ring is in movable sealing contact with the lower wall of the upper bearing bracket.

[0014] Further, the number of the observation ports and the slots is the same as that of the L-shaped mounting grooves, and is at least three, and the observation ports and the slots are both arranged in a circumferential array.

[0015] Further, three V-shaped grooves arranged in a circumferential array are formed in the inner wall of the nail-shaped tube, the adjusting cylinder is slidably inserted into the nail-shaped tube, a first protrusion that is movably clamped with the V-shaped groove is arranged on the outer wall of the upper side of the adjusting cylinder, a movable ring fixedly connected with the L-shaped elastic pressing plate is arranged at the bottom of the nail-shaped tube, three grooves in butt joint with the V-shaped groove are formed in the upper wall of the movable ring, and the first protrusion is adapted to the grooves.

[0016] Further, a T-shaped tube is rotatably connected to the bottom of the inner cavity of the test cylinder, the T-shaped tube is fixedly connected to the inner wall of the sealing ring, and a movable groove corresponding to the T-shaped tube is formed in the bottom of the test cylinder;

[0017] A guide groove is formed in the inner wall of the T-shaped tube, the adjusting cylinder is slidably inserted into the T-shaped tube, a second protrusion that is movably clamped with the guide groove is arranged on the outer wall of the lower side of the adjusting cylinder, and the guide groove is composed of an arc groove and a vertical groove that are connected in series from top to bottom.

[0018] Further, an elastic column is slidably connected to the inner wall of the force measuring sleeve, the pressure sensor is fixedly connected to the outer end of the elastic column, and an arc end capable of being adapted to and contacting the surface of the actuating end of the power unit is arranged at the outer end of the pressure sensor. A through groove is formed in the middle of the elastic column and a slope surface is arranged on the upper wall. An adjusting column is slidably inserted into the force measuring sleeve. A wedge groove is formed in the bottom of the adjusting column, and an inclined surface capable of being in movable contact with the slope surface is arranged in the wedge groove. A connecting ring is fixedly connected to the top of the adjusting column, a collar is rotatably sleeved on the connecting ring, a connecting rod is fixedly connected between the collar and the outer wall of the adjusting cylinder, and a chute adapted to the connecting rod is formed in the outer wall of the test cylinder.

[0019] The beneficial effects of the present invention are as follows:

[0020] 1. When the present invention is installed, the telescopic cylinder II drives the adjusting cylinder to move downward step by step, so as to automatically open each L-shaped installation groove. After each power unit is placed in place, it drives the L-shaped elastic pressing plate to automatically press and fix the power unit, and ensures that the observation port is stably docked with the L-shaped installation groove for observation. The integrated control is convenient and fast for installation, improving the test efficiency. After the test, it is convenient to quickly seal the L-shaped installation groove, avoiding accidental entry of impurities into the L-shaped installation groove, which affects the installation and test of the power unit. At the same time, it avoids the contact between the L-shaped installation groove and air, moisture, etc., resulting in rust and corrosion, ensuring the installation accuracy and service life.

[0021] 2. After the observation port of the present invention is automatically docked with the L-shaped installation groove, the force measuring sleeve synchronously drives the pressure sensor to rotate to the outside of the power unit. After the telescopic cylinder II contracts to the maximum distance, the pressure sensor automatically and safely abuts against the surface of the actuating end of the power unit, so as to facilitate quickly controlling the pressure sensor to measure force accurately starting from zero pressure. Since the pressure sensor retracts during deflection, the wear of the force measuring end during deflection is avoided.

[0022] 3. During the test of the present invention, the test cylinder is controlled to rotate on the rotary support assembly, so as to facilitate simulating the rotation state of the power unit during actual operation. By controlling the rotation of the rotary support assembly as required, the orientation of the test cylinder can be adjusted, so as to more realistically simulate the hydraulic actuating state of the power unit affected by gravity when actually following the guiding tool towards different directions, thereby improving the test accuracy and ensuring the stability and comprehensiveness of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is the three-dimensional structure diagram of the test bench of the present invention;

[0024] Figure 2 is the three-dimensional sectional view of the base part of the test bench of the present invention;

[0025] Figure 3 is the three-dimensional sectional view of the bevel gear ring and rotating ring part of the test bench of the present invention;

[0026] Figure 4 is the three-dimensional sectional view of the test cylinder and sealing ring part of the test bench of the present invention;

[0027] Figure 5 is the three-dimensional structure diagram of the test cylinder and L-shaped installation groove of the test bench of the present invention;

[0028] Figure 6 is the three-dimensional sectional view of the test cylinder and adjusting cylinder part of the test bench of the present invention;

[0029] Figure 7 is the exploded view of the nail-shaped pipe and adjusting cylinder part of the test bench of the present invention;

[0030] Figure 8It is an exploded view of the T-shaped pipe and the adjusting cylinder part of the test bench of the present invention;

[0031] Figure 9 It is an exploded view of the elastic column and the force measuring sleeve part of the test bench of the present invention.

[0032] Reference numerals: 1, base; 11, bevel gear ring; 12, processing panel; 2, rotating ring; 21, bearing bracket; 22, drive shaft rod; 23, bevel gear sleeve; 24, friction cone sleeve; 25, abutting plate; 26, first telescopic cylinder; 3, test cylinder; 31, L-shaped mounting groove; 32, adjusting cylinder; 33, first convex block; 34, second convex block; 35, second telescopic cylinder; 4, sealing ring; 41, observation port; 42, T-shaped pipe; 43, guide groove; 5, force measuring sleeve; 51, elastic column; 52, slope; 53, pressure sensor; 54, adjusting column; 55, wedge groove; 56, connecting ring; 57, collar; 58, connecting rod; 6, nail-shaped pipe; 61, slot; 62, V-shaped groove; 63, L-shaped elastic pressing plate; 64, movable ring; 65, groove. Detailed implementation manners

[0033] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0034] Embodiment 1, as Figures 1-9 shown, a hydraulic performance test bench for a power unit includes a base 1, a processing panel 12 and a rotary support assembly are arranged on the base 1, a rotatable test cylinder 3 is arranged at the front end of the rotary support assembly, a plurality of circumferentially arrayed L-shaped mounting grooves 31 are formed on the outer periphery of the test cylinder 3, an adjusting cylinder 32 is arranged in the middle of the inner cavity of the test cylinder 3, and a second telescopic cylinder 35 is fixedly connected between the adjusting cylinder 32 and the bottom of the inner cavity of the test cylinder 3;

[0035] A sealing ring 4 is rotatably sleeved on the outer periphery of the test cylinder 3, a plurality of observation ports 41 are formed on the sealing ring 4, a force measuring sleeve 5 is fixedly connected in the middle of the observation port 41, a pressure sensor 53 is slidably connected in the force measuring sleeve 5, the pressure sensor 53 is wirelessly connected to the processing panel 12, a nail-shaped pipe 6 is rotatably connected to the top of the test cylinder 3, a plurality of slots 61 are formed on the outer periphery of the top of the nail-shaped pipe 6, and an L-shaped elastic pressing plate 63 for fixing the power unit is slidably inserted on the outer wall of the nail-shaped pipe 6. The adjusting cylinder 32 is used to adjust the sealing of the L-shaped mounting groove 31 and the fixing and pressure measurement of the power unit.

[0036] The number of the observation ports 41 and the slots 61 is the same as that of the L-shaped mounting grooves 31, and is at least three, and the observation ports 41 and the slots 61 are both circumferentially arrayed.

[0037] The observation port 41 on the initial sealing ring 4 is misaligned with the L-shaped mounting groove 31. The sealing ring 4 seals the outside of the L-shaped mounting groove 31. The slot 61 on the nail-shaped tube 6 is misaligned with the L-shaped mounting groove 31. The nail-shaped tube 6 seals the top of the L-shaped mounting groove 31. Thus, when the test bench is not in use, impurities are prevented from accidentally entering the L-shaped mounting groove 31, which may affect the subsequent installation and testing of the power unit. At the same time, it avoids the contact between the L-shaped mounting groove 31 and air, moisture, etc., which may cause rust and corrosion, ensuring the installation accuracy and service life. During installation, by controlling the second telescopic cylinder 35 (the telescopic end of the second telescopic cylinder 35 cannot deflect), the adjusting cylinder 32 is driven to move downward once. The sealing ring 4 automatically drives the observation port 41 to deflect and dock with the outside of the L-shaped mounting groove 31, so as to observe during the installation of the power unit to ensure proper installation. Synchronously, the force-measuring sleeve 5 follows the sealing ring 4 and drives the pressure sensor 53 to just turn to the outside of the L-shaped mounting groove 31. Synchronously, the nail-shaped tube 6 drives the slot 61 to deflect and dock with the top of the L-shaped mounting groove 31, thus opening each L-shaped mounting groove 31. After the power unit is properly placed in each L-shaped mounting groove 31, control the second telescopic cylinder 35 to drive the adjusting cylinder 32 to move downward a second time. The sealing ring 4 drives the observation port 41 and the force-measuring sleeve 5 to remain relatively fixed, while the nail-shaped tube 6 drives the slot 61 to deflect and reset. After the nail-shaped tube 6 is reset, the L-shaped elastic pressing plate 63 automatically presses and fixes the top of the power unit. Synchronously, the pressure sensor 53 automatically extends from the force-measuring sleeve 5 and extends into the L-shaped mounting groove 31 to safely abut against the surface of the actuating end of the power unit, thus facilitating the rapid adjustment of the pressure sensor 53 to accurately measure force starting from zero pressure. Subsequently, control the hydraulic actuation of each power unit. The pressure information received by the pressure sensor 53 is wirelessly transmitted to the processing panel 12. In this process, by driving the adjusting cylinder 32 to move downward step by step through the second telescopic cylinder 35, the integrated control is convenient and fast, improving the test efficiency. After the test, it is also convenient to remove the power unit and quickly seal the L-shaped mounting groove 31. During subsequent tests, control the test cylinder 3 to rotate on the rotary support assembly, thus facilitating the simulation of the rotation state of the power unit during actual operation. Cooperate with the rotation of the rotary support assembly as needed, thus facilitating the orientation adjustment of the test cylinder 3 to more realistically simulate the hydraulic actuation state of the power unit affected by gravity when actually following the guiding tool in different directions, thereby improving the test accuracy and ensuring the stability and comprehensiveness of the test.

[0038] Embodiment 2, on the basis of the above embodiment, the rotary support assembly includes a rotating ring 2 rotatably connected to the front wall of the base 1. Both the upper and lower sides of the front end of the rotating ring 2 are fixedly connected with bearing brackets 21. The test cylinder 3 is rotatably connected between the bearing brackets 21. A driving shaft rod 22 is rotatably connected between the bearing brackets 21. The driving shaft rod 22 is driven by a reduction motor installed on the upper bearing bracket 21. There is a movable connection with a transmission belt between the bottom of the driving shaft rod 22 and the bottom of the test cylinder 3.

[0039] During the test, the reduction motor drives the drive shaft rod 22 to rotate. The drive shaft rod 22 drives the transmission belt to make the test cylinder 3 rotate, so as to simulate the rotation state of following the guiding tool when the power unit actually operates. The simulation is real and the simulation accuracy is improved.

[0040] A bevel gear sleeve 23 is rotatably sleeved on the drive shaft rod 22. A friction cone sleeve 24 which is slidably clamped on the drive shaft rod 22 is arranged at the bottom of the bevel gear sleeve 23. The bottom of the bevel gear sleeve 23 has a friction cone groove adapted to the friction cone sleeve 24. A bottom plate 25 is rotatably sleeved at the bottom of the bevel gear sleeve 23. A first telescopic cylinder 26 is fixedly connected between the bottom plate 25 and the lower bearing bracket 21.

[0041] A bevel gear ring 11 is fixedly connected to the front wall of the base 1. The bevel gear sleeve 23 is meshed and connected with the bevel gear ring 11. The front wall edge of the bevel gear ring 11 has an annular clamping groove. The lower wall of the bottom plate 25 is arc-shaped and is movably abutted against the inner wall of the annular clamping groove. The bottom plate 25 is movably connected with the left wall of the annular clamping groove.

[0042] Initially, the first telescopic cylinder 26 drives the bottom plate 25 to stably abut against the inner wall of the annular clamping groove on the front wall of the bevel gear ring 11. The friction cone sleeve 24 is separated from the bevel gear sleeve 23. The bevel gear sleeve 23 is meshed and connected to the bevel gear ring 11. When the drive shaft rod 22 rotates, it does not drive the bevel gear sleeve 23 to rotate, so the test cylinder 3 does not revolve. When the test cylinder 3 needs to revolve, control the first telescopic cylinder 26 to extend to drive the bottom plate 25 to release the abutting state with the inner wall of the annular clamping groove, and at the same time drive the bottom plate 25 to make the friction cone sleeve 24 abut against the friction cone groove at the bottom of the bevel gear sleeve 23. The friction cone sleeve 24 and the bevel gear sleeve 23 are relatively fixedly connected. Using the property that the friction cone sleeve 24 is slidably clamped with the drive shaft rod 22, when the drive shaft rod 22 rotates, the friction cone sleeve 24 synchronously drives the bevel gear sleeve 23 to rotate. The bevel gear sleeve 23 meshes with the bevel gear ring 11 to make the drive shaft rod 22 drive the rotating ring 2 to rotate. The rotating ring 2 drives the bearing brackets 21 on both sides to make the test cylinder 3 revolve, so as to more realistically simulate the hydraulic actuation state affected by gravity when the power unit actually follows the guiding tool in different directions, thus improving the test accuracy, and at the same time ensuring the stability and comprehensiveness of the test. During this period, the first telescopic cylinder 26 drives the bottom plate 25 to control the rotation and braking of the rotating ring 2, which is convenient to quickly and reliably pause or resume the revolution of the test cylinder 3 when needed, and at the same time avoids the problem of overheating and out-of-control of the motor caused by frequent regulation when directly using an additional motor drive, thus realizing the stable simulation of different operating states.

[0043] Embodiment 3, on the basis of the above embodiment, right-angle edges for limiting the power unit are symmetrically arranged on one side edge of the L-shaped installation groove 31 close to the outer wall of the test cylinder 3.

[0044] With this design, it is convenient to reliably limit the position of the power unit, avoid lateral and longitudinal displacement after the installation of the power unit, and ensure that after the power unit is inserted into the L-shaped installation groove 31, only the L-shaped elastic pressing plate 63 needs to be used to press and fix the power unit from the top to achieve fixed adjustment in the vertical direction, reduce the fixed adjustment steps, facilitate installation, reduce the positioning difficulty, and at the same time, the right-angled edge protrusion limits the power unit inside the L-shaped installation groove 31 and provides a corresponding operating space for the outer operating end of the power unit in the L-shaped installation groove 31.

[0045] Embodiment 4, on the basis of the above embodiment, the outer periphery of the top of the nail-shaped tube 6 has an edge portion extending downward, and the edge portion is in movable and sealed contact with the upper wall of the test cylinder 3 and the upper wall of the upper side bearing bracket 21, and the sealing ring 4 is in movable and sealed contact with the lower wall of the upper side bearing bracket 21.

[0046] With this design, it is ensured that the observation port 41 on the sealing ring 4 is misaligned with the L-shaped installation groove 31, and when the slot 61 on the nail-shaped tube 6 is misaligned with the L-shaped installation groove 31, the sealing ring 4 reliably seals the outside of the L-shaped installation groove 31, and the nail-shaped tube 6 reliably seals the top of the L-shaped installation groove 31, thereby preventing impurities from accidentally entering the L-shaped installation groove 31 when the test bench is not in use, affecting the subsequent installation and testing of the power unit, and at the same time avoiding rust and corrosion caused by the contact of the L-shaped installation groove 31 with air, moisture, etc., ensuring the installation accuracy and service life.

[0047] Embodiment 5, on the basis of the above embodiment, provides an adjustment mechanism for the nail-shaped tube 6 and the L-shaped elastic pressing plate 63:

[0048] The inner wall of the nail-shaped tube 6 is provided with three V-shaped grooves 62 arranged in a circumferential array. The adjusting cylinder 32 is slidably inserted into the nail-shaped tube 6. A first convex block 33 that is movably clamped with the V-shaped groove 62 is provided on the outer wall of the upper side of the adjusting cylinder 32. An activity ring 64 fixedly connected to the L-shaped elastic pressing plate 63 is provided at the bottom of the nail-shaped tube 6. Three grooves 65 that are docked with the V-shaped groove 62 are opened on the upper wall of the activity ring 64, and the first convex block 33 is adapted to the grooves 65.

[0049] The V-shaped groove 62 is in an inclined state. Initially, the first convex block 33 is movably clamped with the top of the V-shaped groove 62. By controlling the second telescopic cylinder 35 to drive the adjusting cylinder 32 to move downward once, the adjusting cylinder 32 drives each first convex block 33 to move downward synchronously to the middle of the V-shaped groove 62. Then, the first convex block 33 squeezes the V-shaped groove 62 to drive the nail-shaped tube 6 to deflect. The deflection of the nail-shaped tube 6 drives the insertion slot 61 to dock with the top of the L-shaped installation groove 31, providing a power unit with an insertion channel. After the power unit is inserted and placed, control the second telescopic cylinder 35 to drive the adjusting cylinder 32 to move downward a second time. The first convex block 33 is clamped from the middle of the V-shaped groove 62 to the bottom of the V-shaped groove 62. The reverse deflection and reset of the nail-shaped tube 6 drive the L-shaped elastic pressing plate 63 to be at the top of the power unit. Subsequently, when the first convex block 33 moves downward and is clamped into the groove 65 and squeezes the groove 65, the first convex block 33 correspondingly squeezes the movable ring 64 to move downward, thereby driving the L-shaped elastic pressing plate 63 to move downward synchronously to squeeze and fix the power unit.

[0050] Embodiment Six. On the basis of the above embodiment, a regulating mechanism for the sealing ring 4 is provided:

[0051] The bottom of the inner cavity of the test cylinder 3 is rotationally connected with a T-shaped tube 42. The T-shaped tube 42 is fixedly connected to the inner wall of the sealing ring 4. An activity groove corresponding to the T-shaped tube 42 is opened at the bottom of the test cylinder 3;

[0052] A guide groove 43 is opened on the inner wall of the T-shaped tube 42. The adjusting cylinder 32 is slidably inserted into the T-shaped tube 42. A second convex block 34 is arranged on the outer wall of the lower side of the adjusting cylinder 32 and is movably clamped with the guide groove 43. The guide groove 43 is composed of a combined arc groove and vertical groove that are connected from top to bottom.

[0053] Initially, the second convex block 34 is movably clamped with the top of the arc groove in the guide groove 43. After controlling the second telescopic cylinder 35 to drive the adjusting cylinder 32 to move downward once, the second convex block 34 just clamps to the bottom of the arc groove. The second convex block 34 squeezes the arc groove to drive the sealing ring 4 to make the observation port 41 deflect and dock with the L-shaped installation groove 31, so as to conduct installation observation when placing the power unit into the L-shaped installation groove 31 to ensure safe and proper placement. Subsequently, as the second telescopic cylinder 35 drives the adjusting cylinder 32 to move downward a second time, the second convex block 34 is clamped from the bottom of the arc groove into the vertical groove and continuously descends along the vertical groove. The sealing ring 4 is relatively fixed, thereby ensuring that the observation port 41 continuously and stably docks with the L-shaped installation groove 31, facilitating subsequent hydraulic actuation observation of the power unit;

[0054] At the same time, after the observation port 41 deflects and docks with the L-shaped installation groove 31, the force measuring sleeve 5 at the middle of the observation port 41 drives the pressure sensor 53 to just be outside the L-shaped installation groove 31. The relative fixation of the sealing ring 4 subsequently ensures the stable force measurement of the pressure sensor 53, which helps to ensure the test accuracy.

[0055] Embodiment Seven. On the basis of the above embodiment, a regulating mechanism for the pressure sensor 53 is provided:

[0056] A elastic column 51 is slidably connected to the inner wall of the force measuring sleeve 5. A pressure sensor 53 is fixedly connected to the outer end of the elastic column 51, and the outer end of the pressure sensor 53 has an arc end that can be adapted to and abutted against the surface of the actuating end of the power unit. A through groove is provided in the middle of the elastic column 51 and a slope 52 is provided on the upper wall. An adjusting column 54 is slidably inserted into the force measuring sleeve 5. A wedge groove 55 is provided at the bottom of the adjusting column 54. An inclined surface that can be movably abutted against the slope 52 is provided in the wedge groove 55. A connecting ring 56 is fixedly connected to the top of the adjusting column 54. A collar 57 is rotatably sleeved on the connecting ring 56. A connecting rod 58 is fixedly connected between the collar 57 and the outer wall of the adjusting cylinder 32. A sliding groove adapted to the connecting rod 58 is provided on the outer wall of the test cylinder 3.

[0057] When the control extension cylinder two 35 drives the adjusting cylinder 32 to move down once, the sealing ring 4 drives the force measuring sleeve 5 so that the pressure sensor 53 just turns to the outside of the L-shaped installation groove 31. Subsequently, as the power unit is placed in the L-shaped installation groove 31, and the extension cylinder two 35 drives the adjusting cylinder 32 to move down a second time until it is about to move down the maximum distance, the extension cylinder two 35 drives the connecting rod 58 so that the collar 57 and the connecting ring 56 move down synchronously. The connecting ring 56 drives the adjusting column 54 to squeeze the slope 52 with the inclined surface in the wedge groove 55, thereby driving the elastic column 51 to make the pressure sensor 53 automatically extend out of the force measuring sleeve 5. After the L-shaped elastic pressing plate 63 completely presses and fixes the power unit, the pressure sensor 53 just extends into the L-shaped installation groove 31 and safely abuts against the surface of the actuating end of the power unit, so as to facilitate quickly adjusting the pressure sensor 53 to measure force accurately starting from zero pressure. And because the pressure sensor 53 is in a retracted state during deflection, the wear of the force measuring end is avoided;

[0058] During the deflection of the force measuring sleeve 5 driven by the sealing ring 4, the connecting ring 56 automatically rotates in the collar 57, which does not affect the subsequent downward movement of the collar 57 driving the connecting ring 56. At the same time, by using the restriction of the sliding groove on the connecting rod 58 and cooperating with the limit deflection design of the telescopic end of the extension cylinder two 35, it is ensured that the adjusting cylinder 32 can only move up and down and cannot rotate, so as to stably drive the sealing ring 4 and the nail-shaped tube 6 to deflect.

[0059] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A hydraulic performance test bench for a power unit, comprising a base table (1), characterized in that, A processing panel (12) and a rotary support assembly are provided on the base (1). A rotatable test cylinder (3) is provided at the front end of the rotary support assembly. A number of L-shaped mounting grooves (31) are circumferentially arrayed on the outer periphery of the test cylinder (3). An adjusting cylinder (32) is provided in the middle of the inner cavity of the test cylinder (3). A second telescopic cylinder (35) is fixedly connected between the adjusting cylinder (32) and the bottom of the inner cavity of the test cylinder (3). A sealing ring (4) is rotatably sleeved on the outer periphery of the test cylinder (3). A number of observation ports (41) are provided on the sealing ring (4). A force measuring sleeve (5) is fixedly connected in the middle of the observation port (41). A pressure sensor (53) is slidably connected in the force measuring sleeve (5). The pressure sensor (53) is wirelessly connected to the processing panel (12). A nail-shaped tube (6) is rotatably connected to the top of the test cylinder (3). A number of insertion slots (61) are provided on the outer periphery of the top of the nail-shaped tube (6). An L-shaped elastic pressing plate (63) for fixing the power unit is slidably inserted on the outer wall of the nail-shaped tube (6). The adjusting cylinder (32) is used to adjust the sealing of the L-shaped mounting groove (31) and the fixing and pressure measurement of the power unit.

2. The hydraulic performance test bench for a power unit according to claim 1, characterized in that, The rotary support assembly includes a rotating ring (2) rotatably connected to the front wall of the base (1). Bearing brackets (21) are fixedly connected to both the upper and lower sides at the front end of the rotating ring (2). The test cylinder (3) is rotatably connected between the bearing brackets (21). A drive shaft rod (22) is rotatably connected between the bearing brackets (21). The drive shaft rod (22) is driven by a reduction motor installed on the upper bearing bracket (21). A transmission belt is movably connected between the bottom of the drive shaft rod (22) and the bottom of the test cylinder (3).

3. The hydraulic performance test bench for a power unit according to claim 2, characterized in that, A bevel gear sleeve (23) is rotatably sleeved on the drive shaft rod (22). A friction cone sleeve (24) is slidably clamped on the bottom of the drive shaft rod (22) at the bottom of the bevel gear sleeve (23). The bottom of the bevel gear sleeve (23) has a friction cone groove adapted to the friction cone sleeve (24). A bottom plate (25) is rotatably sleeved on the bottom of the bevel gear sleeve (23). A first telescopic cylinder (26) is fixedly connected between the bottom plate (25) and the lower bearing bracket (21). A bevel gear ring (11) is fixedly connected to the front wall of the base (1). The bevel gear sleeve (23) is meshed with the bevel gear ring (11). The front wall edge of the bevel gear ring (11) has an annular clamping groove. The lower wall of the bottom plate (25) is arc-shaped and is movably abutted against the inner wall of the annular clamping groove. The bottom plate (25) is movably connected to the left wall of the annular clamping groove.

4. A hydraulic performance test bench for a power unit according to claim 3, characterized in that, Right-angle edge protrusions for limiting the power unit are symmetrically provided on one side edge of the L-shaped mounting groove (31) close to the outer wall of the test cylinder (3).

5. The hydraulic performance test bench for a power unit according to claim 4, wherein, The top periphery of the nail-shaped tube (6) has an edge portion extending downward. The edge portion is movably and sealingly abutted against the upper wall of the test cylinder (3) and the upper wall of the upper bearing bracket (21). The sealing ring (4) is movably and sealingly abutted against the lower wall of the upper bearing bracket (21).

6. The hydraulic performance test bench for a power unit according to claim 5, characterized in that The number of the observation ports (41) and the number of the slots (62) are the same as the number of the L-shaped mounting grooves (31), and are at least three. The observation ports (41) and the slots (62) are both arranged in a circumferential array.

7. The hydraulic performance test bench for a power unit according to claim 6, characterized in that, Three V-shaped grooves (62) arranged in a circumferential array are formed in the inner wall of the nail-shaped tube (6). The adjusting cylinder (32) is slidably inserted into the nail-shaped tube (6). A first convex block (33) which is movably clamped with the V-shaped groove (62) is arranged on the outer wall of the upper side of the adjusting cylinder (32). An activity ring (64) fixedly connected with the L-shaped elastic pressing plate (63) is arranged at the bottom of the nail-shaped tube (6). Three grooves (65) docked with the V-shaped groove (62) are formed in the upper wall of the activity ring (64). The first convex block (33) is adapted to the groove (65).

8. A hydraulic performance test bench for a power unit according to claim 7, characterized in that, A T-shaped tube (42) is rotatably connected to the bottom of the inner cavity of the test cylinder (3). The T-shaped tube (42) is fixedly connected to the inner wall of the sealing ring (4). An activity groove corresponding to the T-shaped tube (42) is formed in the bottom of the test cylinder (3). A guide groove (43) is formed in the inner wall of the T-shaped tube (42). The adjusting cylinder (32) is slidably inserted into the T-shaped tube (42). A second convex block (34) which is movably clamped with the guide groove (43) is arranged on the outer wall of the lower side of the adjusting cylinder (32). The guide groove (43) is composed of an arc groove and a vertical groove which are connected in series from top to bottom.

9. The hydraulic performance test bench for a power unit according to claim 8, characterized in that A elastic column (51) is slidably connected to the inner wall of the force measuring sleeve (5). A pressure sensor (53) is fixedly connected to the outer end of the elastic column (51), and an arc end capable of being adapted to and abutted against the surface of the actuating end of the power unit is arranged at the outer end of the pressure sensor (53). A through groove is formed in the middle of the elastic column (51), and a slope surface (52) is arranged on the upper wall. An adjusting column (54) is slidably inserted into the force measuring sleeve (5). A wedge groove (55) is formed in the bottom of the adjusting column (54), and an inclined surface capable of being movably abutted against the slope surface (52) is arranged in the wedge groove (55). A connecting ring (56) is fixedly connected to the top of the adjusting column (54). A sleeve ring (57) is rotatably sleeved on the connecting ring (56). A connecting rod (58) is fixedly connected between the sleeve ring (57) and the outer wall of the adjusting cylinder (32). A chute adapted to the connecting rod (58) is formed in the outer wall of the test cylinder (3).

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