A rotary joint test oil supply device and oil supply method thereof

Abstract

The present invention discloses a rotary joint test oil supply device and an oil supply method thereof, and relates to the technical field of rotary joint test. The rotary joint test oil supply device comprises a test bench, a shifting mechanism is installed above the test bench, a driving mechanism is installed above the shifting mechanism, a support seat is installed below the test bench, an oil tank chamber is arranged below the support seat, and the four corners of the lower end of the support seat are connected to the oil tank chamber through supporting feet, an oil drain valve is installed at the rear end of the oil tank chamber, a hydraulic oil pump is installed at the middle position of the upper end of the oil tank chamber, an oil extraction pipe is installed on one side of the end of the hydraulic oil pump, and the oil extraction pipe passes through and extends to the inside of the oil tank chamber, and an oil supply pipe is installed above the end of the hydraulic oil pump. This scheme solves the problems that the existing test device cannot continuously test multiple rotary joints, has low efficiency, can only test rotary joints of a single specification and type, and has low versatility.

Description

Technical Field

[0001] The invention relates to the technical field of rotary joint testing, in particular to a rotary joint testing oil supply device and an oil supply method thereof. Background Art

[0002] In order to test the reliability of hydraulic rotary joints, it is necessary to know the failure modes and damage causes of hydraulic rotary joints under different pressures and speeds. At present, test devices are usually used to simulate the operating mode of hydraulic rotary joints under working conditions to conduct reliability tests. The current rotary joint test device, such as the announcement number CN212963968U, is a rotary joint working life test device, which includes a bench, a vertical plate is arranged on the bench, and a rotary joint to be tested and a motor for driving the rotary joint to rotate are arranged on the bench; a first end tube is arranged at one end of the rotary joint, and a second end tube is arranged at the other end of the rotary joint; one end of the first end tube is fixedly connected to the vertical plate, and the other end of the first end tube is connected to the outer roller of the rotary joint; one end of the second end tube is connected to the inner roller of the rotary joint, and the other end of the second end tube is connected to the motor through a bearing assembly; a pressure sensor is arranged below the bearing assembly, and a lifting and lowering adjustment mechanism is arranged below the pressure sensor; However, the existing test device cannot test multiple rotary joints continuously, and has low efficiency. It can only test rotary joints of a single specification and type, and has low versatility. To this end, we provide a rotary joint test oil supply device and an oil supply method thereof. Summary of the invention

[0003] The object of the present invention is to provide a rotary joint test oil supply device and an oil supply method thereof, so as to solve the problem that the existing test device proposed in the above background technology cannot continuously test multiple rotary joints, has low efficiency, can only test rotary joints of a single specification and type, and has low versatility.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a rotary joint test oil supply device, comprising a test bench, a transposition mechanism is installed above the test bench, a driving mechanism is installed above the transposition mechanism, a support seat is installed below the test bench, an oil tank chamber is arranged below the support seat, and the four corners of the lower end of the support seat are connected to the oil tank chamber through supporting feet, an oil drain valve is installed at the rear end of the oil tank chamber, a hydraulic oil pump is installed at the middle position of the upper end of the oil tank chamber, an oil extraction pipe is installed on one side of the end of the hydraulic oil pump, and the oil extraction pipe penetrates and extends to the inside of the oil tank chamber, an oil supply pipe is installed above the end of the hydraulic oil pump, and one end of the oil supply pipe is connected to the bottom of the test bench, a plurality of return oil joints are arranged around the upper end of the oil tank chamber, connecting sections are arranged around the test bench, a pressure sensor is installed on the connecting section, a rotary joint is arranged at the end of the connecting section, a driven mechanism is installed at the end of the rotary joint, an active mechanism is installed around the upper end of the test bench, and the active mechanism is transmission-connected with the driven mechanism.

[0005] Preferably, a spherical cavity is provided inside the test bench, and the four sides of the spherical cavity are respectively connected with the connecting sections around the test bench, a ball seat is installed inside the spherical cavity, a V-shaped flow groove is provided inside the ball seat, the shifting mechanism includes a belt drive cover and a stepper motor, pulleys are provided at both ends of the belt drive cover, and the pulleys at both ends are connected by transmission belt transmission, the pulley shaft at one end passes through and extends to the interior of the test bench and is connected to the ball seat, the stepper motor is installed at one end of the belt drive cover, the output end of the stepper motor passes through and extends to the interior of the belt drive cover, and is connected to the pulley shaft at the other end.

[0006] Preferably, one end of the connecting section is connected to the test bench via a first flange, and a second flange is installed at the other end of the connecting section. The rotary joint includes a fixed section and a rotating section, and the rotating section is rotatably connected to one end of the fixed section. One end of the fixed section is connected to the second flange on the connecting section via a third flange.

[0007] Preferably, at least one oil outlet joint is provided on the outer wall of the rotating section, and the oil outlet joint is connected to the oil return joint on the oil tank chamber through an oil return hose.

[0008] Preferably, the driving mechanism includes active bevel gears, pillars, a carrier and a servo motor, the pillars are installed at the four corners of the lower end of the carrier and fixedly connected to the test bench, the servo motor is installed at the upper end of the carrier, and the output end of the servo motor passes through and extends to the lower end of the carrier, and the active bevel gears are installed on the output end of the servo motor.

[0009] Preferably, the active mechanism includes a transmission shaft, a bearing seat, a driven bevel gear and a driving wheel, the driven bevel gear is installed at one end of the transmission shaft, and the transmission shaft is connected to the driving bevel gear through the meshing transmission of the driven bevel gear and the driving bevel gear, the transmission shaft is rotatably connected to the test bench through the bearing seat, and a bearing is installed at the connection between the bearing seat and the transmission shaft, and the driving wheel is installed at the other end of the transmission shaft.

[0010] Preferably, the driven mechanism is a driven wheel with a slot inside, an annular rubber pad is provided on the inner wall of the slot, a plurality of arched protrusions are provided on the inner wall of the annular rubber pad, and the driven wheel is sleeve-connected with the rotating section of the rotary joint through the elasticity of the annular rubber pad in the slot.

[0011] Preferably, the driven mechanism is a driven wheel having a screw on its end face, a threaded seat corresponding to the screw is provided at the end of the rotating section of the rotary joint, and the driven wheel is threadedly connected to the threaded seat on the rotating section through the screw.

[0012] Preferably, anti-slip grooves are provided on the outer walls of the driving wheel and the driven wheel.

[0013] Preferably, a method for supplying oil to a rotary joint test oil supply device comprises the following steps: Step 1: Before the experiment, first install the driven mechanism on the rotating section of the rotary joint; Step 2: After the driven mechanism is installed, fix the rotary joint on the connecting section of the test bench. There are four connecting sections around the test bench, and four rotary joints can be installed at one time. After the rotary joint is installed, its driven mechanism contacts the driving wheel on the active mechanism of the device; Step 3: Connect the oil outlet joint on the rotary joint to the oil return joint on the oil tank chamber through the oil return hose. There is a set of oil return joints in each of the four directions of the oil tank chamber, corresponding to the four rotary joints one by one; Step 4: Drive the hydraulic oil pump and the driving mechanism to operate. The hydraulic oil pump pumps the hydraulic oil into the spherical cavity of the test bench along the oil supply pipe. Under the guidance of the V-shaped flow groove in the ball seat, the hydraulic oil flows into one of the rotary joints on the test bench, and the hydraulic oil flowing out of the oil outlet joint of the rotary joint returns to the oil tank chamber along the oil return hose to conduct a circulating oil supply test. During the process, the servo motor on the driving mechanism reciprocates in a positive and negative direction within a range of 90 degrees under the action of the encoder. The active bevel gear at the output end and the driven bevel gear on the surrounding active mechanisms are used to drive the transmission shaft and the driving wheel to reciprocate, and the driven mechanism on the outer wall of the rotating section is contacted and driven, so that the rotary joint is tested in the process of simulated rotation; Step 5: During the test, the pressure sensor can detect the oil pressure change in real time to determine whether a leak occurs. When the rotary joint of the first station is tested, the position change mechanism drives the ball seat in the test bench to rotate through the stepper motor and the belt drive mechanism, so that the V-shaped flow groove in the ball seat is connected to the rotary joint of the next station, thereby realizing continuous testing.

[0014] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention sets four testing stations on the test bench. The rotary joints on each station are connected to the oil tank chamber through an oil return hose. A ball seat is set in the test bench and driven by a transposition mechanism. The flow direction is controlled by an internal V-shaped flow groove to change the test target. During the process, the hydraulic oil pump pumps the hydraulic oil into the spherical cavity of the test bench along the oil supply pipe. Under the guidance of the V-shaped flow groove in the ball seat, the hydraulic oil flows into one of the rotary joints on the test bench. The hydraulic oil flowing out of the oil outlet joint of the rotary joint returns to the oil tank chamber along the oil return hose to perform a circulating oil supply test. During the process, the servo motor on the driving mechanism reciprocates and reverses within a range of 90 degrees under the action of the encoder. The active bevel gear at the output end and the driven bevel gear on the surrounding active mechanisms are used to drive the transmission shaft and the active wheel to reciprocate and rotate. The driven mechanism on the outer wall of the rotating section is contacted and driven, so that the rotary joint is tested during the simulated rotation process. This solves the problem that the existing test device cannot continuously test multiple rotary joints and has low efficiency.

[0015] (2) The connecting section on the test bench of the present invention is a detachable structure. The connecting section of the corresponding specification can be replaced according to the specifications of the rotary joint to meet the connection requirements of different types of rotary joints. The driven mechanism also has a certain diversity to meet the assembly work of different types of rotary joints, so as to achieve the effect of driving the rotary joint to rotate during the test to simulate the working state, thereby solving the problem that the existing test device can only test rotary joints of a single specification and type and has low versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic structural diagram of the drive mechanism of the present invention in a disassembled state; Figure 3 It is a schematic diagram of the internal structure of the test bench of the present invention; Figure 4 It is a schematic diagram of the connection structure of the rotary joint and the driven mechanism of the present invention; Figure 5 This is a schematic diagram of the overall structure of Embodiment 2 of the present invention; Figure 6 This is a schematic diagram of the connection structure between the rotary joint and the driven mechanism of Example 2 of the present invention; In the figure: 1. test bench; 101. connection section; 102. first flange; 103. pressure sensor; 104. second flange; 105. spherical cavity; 106. ball seat; 107. V-shaped flow groove; 2. support seat; 201. support foot; 3. oil tank chamber; 301. hydraulic oil pump; 302. oil extraction pipe; 303. oil supply pipe; 304. oil return joint; 4. driving mechanism; 401. active bevel gear; 402. support; 403. carrier; 404. servo motor; 5. active mechanism; 50 1. Transmission shaft; 502. Bearing seat; 503. Bearing; 504. Driven bevel gear; 6. Driving wheel; 7. Rotary joint; 701. Fixed section; 702. Third flange; 703. Rotating section; 704. Oil outlet joint; 705. Threaded seat; 8. Driven mechanism; 801. Driven wheel; 802. Slot; 803. Annular rubber pad; 804. Arched protrusion; 805. Screw; 9. Transposition mechanism; 901. Belt drive cover; 902. Stepping motor; 10. Oil return hose; 11. Anti-skid pattern. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0018] Example 1 See also Figure 1-4 A rotary joint test oil supply device includes a test bench 1, a shifting mechanism 9 is installed above the test bench 1, a driving mechanism 4 is installed above the shifting mechanism 9, a support seat 2 is installed below the test bench 1, an oil tank chamber 3 is arranged below the support seat 2, and the four corners of the lower end of the support seat 2 are connected to the oil tank chamber 3 through supporting feet 201, an oil drain valve is installed at the rear end of the oil tank chamber 3, a hydraulic oil pump 301 is installed at the middle position of the upper end of the oil tank chamber 3, an oil extraction pipe 302 is installed on one side of the end of the hydraulic oil pump 301, and the oil extraction pipe 302 penetrates and extends to Inside the oil tank chamber 3, an oil supply pipe 303 is installed above the end of the hydraulic oil pump 301, and one end of the oil supply pipe 303 is connected to the bottom end of the test bench 1, and multiple oil return joints 304 are arranged around the upper end of the oil tank chamber 3, and connecting sections 101 are arranged around the test bench 1. A pressure sensor 103 is installed on the connecting section 101, and a rotary joint 7 is arranged at the end of the connecting section 101. A driven mechanism 8 is installed at the end of the rotary joint 7. Active mechanisms 5 are installed around the upper end of the test bench 1, and the active mechanism 5 is transmission-connected to the driven mechanism 8.

[0019] See also Figure 2 and Figure 3A spherical cavity 105 is provided inside the test bench 1, and the four sides of the spherical cavity 105 are respectively connected with the connecting sections 101 around the test bench 1, a ball seat 106 is installed inside the spherical cavity 105, and a V-shaped flow groove 107 is provided inside the ball seat 106. The transposition mechanism 9 includes a belt drive cover 901 and a stepper motor 902. Pulleys are provided at both ends of the belt drive cover 901, and the pulleys at both ends are connected by transmission belt transmission. The pulley shaft at one end passes through and extends to the inside of the test bench 1 and is connected to the ball seat 106. The stepper motor 902 is installed at one end of the belt drive cover 901, and the output end of the stepper motor 902 passes through and extends to the inside of the belt drive cover 901, and is connected to the pulley shaft at the other end. The transposition mechanism 9 can control the direction of the ball seat 106 in the test bench 1, thereby switching the oil supply direction of the hydraulic oil through the V-shaped flow groove 107 on the ball seat 106 to realize the conversion of the detection station.

[0020] See also Figure 1 One end of the connecting section 101 is connected to the test bench 1 through the first flange 102, and the other end of the connecting section 101 is installed with a second flange 104. The rotary joint 7 includes a fixed section 701 and a rotating section 703. The rotating section 703 is rotatably connected to one end of the fixed section 701, and one end of the fixed section 701 is connected to the second flange 104 on the connecting section 101 through the third flange 702. The connecting section 101 is a detachable structure. According to the specifications of the rotary joint 7, the connecting section 101 of the corresponding specification can be replaced to meet the connection requirements of different types of rotary joints 7.

[0021] Furthermore, an oil outlet connector 704 is disposed on the outer wall of the rotating section 703 , and the oil outlet connector 704 is connected to the oil return connector 304 on the oil tank chamber 3 through an oil return hose 10 .

[0022] Further, the driving mechanism 4 includes an active bevel gear 401, a pillar 402, a platform 403 and a servo motor 404, the pillar 402 is installed at the four corners of the lower end of the platform 403, and is fixedly connected to the test bench 1, the servo motor 404 is installed at the upper end of the platform 403, and the output end of the servo motor 404 passes through and extends to the lower end of the platform 403, the active bevel gear 401 is installed on the output end of the servo motor 404, the active mechanism 5 includes a transmission shaft 501, a bearing seat 502, a driven bevel gear 504 and a driving wheel 6, the driven bevel gear 504 is installed at one end of the transmission shaft 501, and the transmission shaft 501 is connected to the driven bevel gear 504 through the driven bevel gear 504. The active bevel gear 401 is meshed and connected for transmission, the transmission shaft 501 is rotationally connected to the test bench 1 through the bearing seat 502, and a bearing 503 is installed at the connection between the bearing seat 502 and the transmission shaft 501, and the driving wheel 6 is installed at the other end of the transmission shaft 501. The servo motor 404 on the driving mechanism 4 reciprocates in forward and reverse rotation within a range of ninety degrees under the action of the encoder, and the active bevel gear 401 at the output end is transmitted with the driven bevel gear 504 on the surrounding active mechanisms 5, driving the transmission shaft 501 and the driving wheel 6 to reciprocate, and contacting and transmitting with the driven mechanism 8 on the outer wall of the rotating section 703, so that the rotary joint 7 is tested during the simulated rotation process.

[0023] See also Figure 4 The driven mechanism 8 is a driven wheel 801 with a slot 802 inside. An annular rubber pad 803 is provided on the inner wall of the slot 802. A plurality of arched protrusions 804 are provided on the inner wall of the annular rubber pad 803. The driven wheel 801 is sleeve-connected with the rotating section 703 of the rotary joint 7 through the elasticity of the annular rubber pad 803 in the slot 802. For the rotary joint 7 without a connection structure on the end face, the driven wheel 801 with a slot 802 inside can be used to fix the end face of the rotary joint 7 in a sleeve-connected manner. To ensure the fixing stability, an annular rubber pad 803 is provided on the inner wall of the slot 802. A plurality of arched protrusions 804 are provided on the inner wall of the annular rubber pad 803. The connection stability of the driven wheel 801 is significantly improved by relying on multiple contacts and the elastic effect of rubber.

[0024] Furthermore, anti-skid patterns 11 are provided on the outer walls of the driving wheel 6 and the driven wheel 801. The anti-skid patterns 11 increase the friction force at the connection between the driving wheel 6 and the driven wheel 801, so that the rotating joint 7 can be driven to rotate more stably.

[0025] See also Figure 1-4 , a method for supplying oil to a rotary joint test oil supply device, comprising the following steps: Step 1: Before the experiment, first install the driven mechanism 8 on the rotating section 703 of the rotary joint 7. The driven mechanism 8 is a driven wheel 801 with a slot 802 inside, which is fixed to the end face of the rotary joint 7 in a sleeve connection manner; Step 2: After the driven mechanism 8 is installed, the rotary joint 7 is fixed to the connecting section 101 of the test bench 1. There are four connecting sections 101 around the test bench 1, and four rotary joints 7 can be installed at one time. After the rotary joint 7 is installed, its driven mechanism 8 contacts the driving wheel 6 on the active mechanism 5 of the device; Step 3: Connect the oil outlet joint 704 on the rotary joint 7 to the oil return joint 304 on the oil tank chamber 3 through the oil return hose 10. The oil return joint 304 is provided with a group in each of the four directions of the oil tank chamber 3, corresponding to the four rotary joints 7 one by one; Step 4: drive the hydraulic oil pump 301 and the driving mechanism 4 to operate, and the hydraulic oil pump 301 pumps the hydraulic oil into the spherical cavity 105 of the test bench 1 along the oil supply pipe 303, and under the guidance of the V-shaped flow groove 107 in the ball seat 106, the hydraulic oil flows into one of the rotary joints 7 on the test bench 1, and the hydraulic oil flowing out of the oil outlet joint 704 of the rotary joint 7 returns to the oil tank chamber 3 along the return oil hose 10 to perform a circulating oil supply test. During the process, the servo motor 404 on the driving mechanism 4 reciprocates in a positive and negative rotation within a range of 90 degrees under the action of the encoder, and the active bevel gear 401 at the output end and the driven bevel gear 504 on the surrounding active mechanisms 5 are used to drive the transmission shaft 501 and the driving wheel 6 to reciprocate, and the driven mechanism 8 on the outer wall of the rotating section 703 is contacted and driven, so that the rotary joint 7 is tested in the process of simulated rotation; Step 5: During the test, the pressure sensor 103 can detect the oil pressure change in real time to determine whether a leak occurs. After the rotary joint 7 of the first station is tested, the ball seat 106 in the test bench 1 is driven to rotate by the shifting mechanism 9 through the stepping motor 902 and the belt transmission mechanism, so that the V-shaped flow groove 107 in the ball seat 106 is connected to the rotary joint 7 of the next station, thereby realizing continuous testing.

[0026] Example 2 See also Figure 5-6A rotary joint test oil supply device includes a test bench 1, a shifting mechanism 9 is installed above the test bench 1, a driving mechanism 4 is installed above the shifting mechanism 9, a support seat 2 is installed below the test bench 1, an oil tank chamber 3 is arranged below the support seat 2, and the four corners of the lower end of the support seat 2 are connected to the oil tank chamber 3 through supporting feet 201, an oil drain valve is installed at the rear end of the oil tank chamber 3, a hydraulic oil pump 301 is installed at the middle position of the upper end of the oil tank chamber 3, an oil extraction pipe 302 is installed on one side of the end of the hydraulic oil pump 301, and the oil extraction pipe 302 penetrates and extends to Inside the oil tank chamber 3, an oil supply pipe 303 is installed above the end of the hydraulic oil pump 301, and one end of the oil supply pipe 303 is connected to the bottom end of the test bench 1, and multiple oil return joints 304 are arranged around the upper end of the oil tank chamber 3, and connecting sections 101 are arranged around the test bench 1. A pressure sensor 103 is installed on the connecting section 101, and a rotary joint 7 is arranged at the end of the connecting section 101. A driven mechanism 8 is installed at the end of the rotary joint 7. Active mechanisms 5 are installed around the upper end of the test bench 1, and the active mechanism 5 is transmission-connected to the driven mechanism 8.

[0027] Furthermore, one end of the connecting section 101 is connected to the test bench 1 through the first flange 102, and the other end of the connecting section 101 is installed with a second flange 104. The rotary joint 7 includes a fixed section 701 and a rotating section 703. The rotating section 703 is rotatably connected to one end of the fixed section 701, and one end of the fixed section 701 is connected to the second flange 104 on the connecting section 101 through the third flange 702.

[0028] Furthermore, two oil outlet joints 704 are provided on the outer wall of the rotating section 703 , and the two oil outlet joints 704 are connected to the oil return joint 304 on the oil tank chamber 3 through the oil return hose 10 .

[0029] See also Figure 5 The driven mechanism 8 is a driven wheel 801 having a screw rod 805 on the end face, and a threaded seat 705 corresponding to the screw rod 805 is provided at the end of the rotating section 703 of the rotary joint 7, and the driven wheel 801 is threadedly connected with the threaded seat 705 on the rotating section 703 through the screw rod 805. When a connection structure is preset at the end of the rotary joint 7, a corresponding docking structure can be provided on the driven wheel 801 according to the connection structure to facilitate connection and fixation, such as the screw rod 805 and the threaded seat 705.

[0030] Furthermore, anti-slip grooves 11 are provided on the outer walls of the driving wheel 6 and the driven wheel 801 .

[0031] See also Figure 5-6 , a method for supplying oil to a rotary joint test oil supply device, comprising the following steps: Step 1: Before the experiment, first install the driven mechanism 8 on the rotating section 703 of the rotary joint 7. The driven mechanism 8 is a driven wheel 801 with a screw rod 805 on the end surface, which is threadedly connected to the threaded seat 705 of the rotating section 703 through the screw rod 805; Step 2: After the driven mechanism 8 is installed, the rotary joint 7 is fixed to the connecting section 101 of the test bench 1. There are four connecting sections 101 around the test bench 1, and four rotary joints 7 can be installed at one time. After the rotary joint 7 is installed, its driven mechanism 8 contacts the driving wheel 6 on the active mechanism 5 of the device; Step 3: Connect the two oil outlet joints 704 on the rotary joint 7 to the oil return joint 304 on the oil tank chamber 3 through the oil return hose 10. The oil return joint 304 is provided with a group in each of the four directions of the oil tank chamber 3, corresponding to the four rotary joints 7 one by one; Step 4: drive the hydraulic oil pump 301 and the driving mechanism 4 to operate, and the hydraulic oil pump 301 pumps the hydraulic oil into the spherical cavity 105 of the test bench 1 along the oil supply pipe 303, and under the guidance of the V-shaped flow groove 107 in the ball seat 106, the hydraulic oil flows into one of the rotary joints 7 on the test bench 1, and the hydraulic oil flowing out of the oil outlet joint 704 of the rotary joint 7 returns to the oil tank chamber 3 along the return oil hose 10 to perform a circulating oil supply test. During the process, the servo motor 404 on the driving mechanism 4 reciprocates in a positive and negative rotation within a range of 90 degrees under the action of the encoder, and the active bevel gear 401 at the output end and the driven bevel gear 504 on the surrounding active mechanisms 5 are used to drive the transmission shaft 501 and the driving wheel 6 to reciprocate, and the driven mechanism 8 on the outer wall of the rotating section 703 is contacted and driven, so that the rotary joint 7 is tested in the process of simulated rotation; Step 5: During the test, the pressure sensor 103 can detect the oil pressure change in real time to determine whether a leak occurs. After the rotary joint 7 of the first station is tested, the ball seat 106 in the test bench 1 is driven to rotate by the shifting mechanism 9 through the stepping motor 902 and the belt transmission mechanism, so that the V-shaped flow groove 107 in the ball seat 106 is connected to the rotary joint 7 of the next station, thereby realizing continuous testing.

[0032] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A rotary joint test oil supply device, comprising a test bench (1), characterized in that: A shifting mechanism (9) is installed above the test bench (1), a driving mechanism (4) is installed above the shifting mechanism (9), a support seat (2) is installed below the test bench (1), an oil tank chamber (3) is provided below the support seat (2), and the four corners of the lower end of the support seat (2) are connected to the oil tank chamber (3) through supporting legs (201), an oil drain valve is installed at the rear end of the oil tank chamber (3), a hydraulic oil pump (301) is installed at the middle position of the upper end of the oil tank chamber (3), an oil extraction pipe (302) is installed on one side of the end of the hydraulic oil pump (301), and the oil extraction pipe (302) penetrates and extends to the interior of the oil tank chamber (3), and the An oil supply pipe (303) is installed above the end of the hydraulic oil pump (301), and one end of the oil supply pipe (303) is connected to the bottom end of the test bench (1). A plurality of oil return joints (304) are arranged around the upper end of the oil tank chamber (3). A connecting section (101) is arranged around the test bench (1). A pressure sensor (103) is installed on the connecting section (101). A rotary joint (7) is arranged at the end of the connecting section (101). A driven mechanism (8) is installed at the end of the rotary joint (7). An active mechanism (5) is installed around the upper end of the test bench (1), and the active mechanism (5) is connected to the driven mechanism (8) in a transmission manner.

2. A rotary joint test oil supply device according to claim 1, characterized in that: The test bench (1) is provided with a spherical cavity (105) inside, and the four sides of the spherical cavity (105) are respectively connected to the connecting sections (101) around the test bench (1), the spherical cavity (105) is installed with a ball seat (106) inside, and the ball seat (106) is provided with a V-shaped flow groove (107) inside. The shifting mechanism (9) comprises a belt drive cover (901) and a stepper motor (902), and pulleys are provided at both ends inside the belt drive cover (901), and the pulleys at both ends are connected by transmission belt transmission, and the pulley shaft at one end passes through and extends to the inside of the test bench (1) and is connected to the ball seat (106), and the stepper motor (902) is installed at one end of the belt drive cover (901), and the output end of the stepper motor (902) passes through and extends to the inside of the belt drive cover (901), and is connected to the pulley shaft at the other end.

3. A rotary joint test oil supply device according to claim 2, characterized in that: One end of the connecting section (101) is connected to the test bench (1) via a first flange (102), and the other end of the connecting section (101) is provided with a second flange (104). The rotary joint (7) comprises a fixed section (701) and a rotating section (703), wherein the rotating section (703) is rotatably connected to one end of the fixed section (701), and one end of the fixed section (701) is connected to the second flange (104) on the connecting section (101) via a third flange (702).

4. A rotary joint test oil supply device according to claim 3, characterized in that: At least one oil outlet joint (704) is provided on the outer wall of the rotating section (703), and the oil outlet joint (704) is connected to the oil return joint (304) on the oil tank chamber (3) via an oil return hose (10).

5. A rotary joint test oil supply device according to claim 4, characterized in that: The driving mechanism (4) comprises an active bevel gear (401), a support (402), a platform (403) and a servo motor (404); the support (402) is mounted at four corners of the lower end of the platform (403) and is fixedly connected to the test bench (1); the servo motor (404) is mounted at the upper end of the platform (403); the output end of the servo motor (404) passes through and extends to the lower end of the platform (403); and the active bevel gear (401) is mounted on the output end of the servo motor (404).

6. A rotary joint test oil supply device according to claim 5, characterized in that: The active mechanism (5) comprises a transmission shaft (501), a bearing seat (502), a driven bevel gear (504) and a driving wheel (6); the driven bevel gear (504) is mounted on one end of the transmission shaft (501), and the transmission shaft (501) is meshed and transmission-connected with the driving bevel gear (401) through the driven bevel gear (504); the transmission shaft (501) is rotationally connected to the test bench (1) through the bearing seat (502), and a bearing (503) is installed at the connection between the bearing seat (502) and the transmission shaft (501); and the driving wheel (6) is mounted on the other end of the transmission shaft (501).

7. A rotary joint test oil supply device according to claim 6, characterized in that: The driven mechanism (8) is a driven wheel (801) having a slot (802) inside, an annular rubber pad (803) is provided on the inner wall of the slot (802), a plurality of arched protrusions (804) are provided on the inner wall of the annular rubber pad (803), and the driven wheel (801) is sleeve-connected to the rotating section (703) of the rotary joint (7) through the elasticity of the annular rubber pad (803) inside the slot (802).

8. A rotary joint test oil supply device according to claim 7, characterized in that: The driven mechanism (8) is a driven wheel (801) having a screw rod (805) on its end surface, a threaded seat (705) corresponding to the screw rod (805) is provided at the end of the rotating section (703) of the rotary joint (7), and the driven wheel (801) is threadedly connected to the threaded seat (705) on the rotating section (703) via the screw rod (805).

9. A rotary joint test oil supply device according to claim 8, characterized in that: Anti-slip grooves (11) are provided on the outer walls of the driving wheel (6) and the driven wheel (801).

10. A method for supplying oil to a rotary joint test oil supply device, implemented based on the rotary joint test oil supply device according to claim 9, characterized in that: The following steps are involved: Step 1: Before the experiment, first install the driven mechanism (8) on the rotating section (703) of the rotary joint (7); Step 2: After the driven mechanism (8) is installed, the rotary joint (7) is fixed to the connecting section (101) of the test bench (1). A total of four connecting sections (101) are provided around the test bench (1), and four rotary joints (7) can be installed at one time. After the rotary joint (7) is installed, its driven mechanism (8) contacts the driving wheel (6) on the active mechanism (5) of the device; Step 3: Connect the oil outlet joint (704) on the rotary joint (7) to the oil return joint (304) on the oil tank chamber (3) through the oil return hose (10); a set of oil return joints (304) is provided in each of the four directions of the oil tank chamber (3), corresponding to the four rotary joints (7) one by one; Step 4: Drive the hydraulic oil pump (301) and the driving mechanism (4) to operate. The hydraulic oil pump (301) pumps the hydraulic oil into the spherical cavity (105) of the test bench (1) along the oil supply pipe (303). Under the guidance of the V-shaped flow groove (107) in the ball seat (106), the hydraulic oil flows into one of the rotary joints (7) on the test bench (1). The hydraulic oil flowing out of the oil outlet joint (704) of the rotary joint (7) returns to the oil tank chamber (3) along the oil return hose (10). In order to conduct a circulating oil supply test, during the process, the servo motor (404) on the driving mechanism (4) reciprocates in forward and reverse rotation within a range of ninety degrees under the action of the encoder, and the driving bevel gear (401) at the output end and the driven bevel gear (504) on the surrounding active mechanism (5) are used to drive the transmission shaft (501) and the driving wheel (6) to reciprocate, and the driven mechanism (8) on the outer wall of the rotating section (703) is contacted and driven, so that the rotary joint (7) is tested in the process of simulating rotation; Step 5: During the test, the pressure sensor (103) can detect the oil pressure change in real time, thereby determining whether a leak occurs. When the rotary joint (7) of the first station is tested, the ball seat (106) in the test bench (1) is driven to rotate by the position change mechanism (9) through the stepper motor (902) and the belt transmission mechanism, so that the V-shaped flow groove (107) in the ball seat (106) is connected to the rotary joint (7) of the next station, thereby realizing continuous testing.

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