Gear pump performance automatic test bench

Abstract

The present application relates to gear pump detection equipment technical field, specifically to a kind of gear pump performance automation test bench, a kind of gear pump performance automation test bench, including the test bench main body for carrying out performance detection to gear pump, and clamping concrete, the clamping concrete is parallelly arranged in the front side of the holding piece, and the bottom of clamping concrete is provided with direct motion pair;And a pair of left and right interval arrangement sealing joint, the sealing joint includes support part and rotating part, and the inside of support part and rotating part is formed continuous oil channel.The present application can effectively solve the test bench of prior art when using, gear pump is installed and disassembled on test bench, and the pipe head connection liquid inlet and liquid outlet of test bench oil circuit unit's oil outlet pipe and oil return pipe, all need manual disassembly of staff, it is time-consuming and laborious to operate, difficult to improve the operating efficiency of gear pump performance test problem.

Description

Technical Field

[0001] This invention relates to the field of gear pump testing equipment technology, specifically to an automated testing bench for the factory performance of gear pumps. Background Technology

[0002] After assembly, each gear pump needs to undergo performance simulation testing. Current technology often uses gear pump test benches, which are devices used for testing the performance and sealing properties of gear pumps. Their principle is to simulate actual working conditions to subject the gear pump to load and pressure tests to evaluate its performance and sealing effectiveness. The specific application process in current technology is as follows:

[0003] First, the gear pump is manually installed onto the test bench. Workers use wrenches and other tools, along with locking pins, buckles, and other structures, to fix the shaft of the gear pump onto the retaining parts of the test bench.

[0004] Then, according to the testing requirements, the staff used wrenches to connect the oil outlet and return pipes of the oil circuit unit on the test bench to the inlet and outlet of the gear pump, ensuring a tight and leak-free connection. Next, the load on the test bench was manually adjusted according to the rated operating conditions of the gear pump to simulate the load under actual working conditions. A load adjustment device or regulating valve can be used to adjust the load.

[0005] Applying pressure: Apply a certain pressure to the oil outlet line of the test bench using a pressure source to simulate the pressure conditions under actual working conditions. The pressure should be determined according to the design and specifications of the gear pump. Start the test bench to allow the gear pump to run. The speed and load of the gear pump can be adjusted according to the test requirements to simulate performance under different operating conditions. After the experiment, the pipeline and gear pump are manually disassembled separately.

[0006] Throughout the gear pump simulation test, the installation and disassembly of the gear pump on the test bench, as well as the connection of the oil outlet and return pipes of the test bench's oil circuit unit to the inlet and outlet of the gear pump, all required manual disassembly and assembly by the staff. This operation was time-consuming and labor-intensive, making it difficult to improve the efficiency of the gear pump performance test. Summary of the Invention

[0007] Technical problems to be solved

[0008] To address the aforementioned shortcomings of existing technologies, this invention provides an automated testing bench for gear pump factory performance. This effectively solves the problem that, during the use of existing testing benches, the installation and disassembly of the gear pump on the testing bench, as well as the connection of the oil outlet and return pipes of the testing bench's oil circuit unit to the inlet and outlet of the gear pump, all require manual disassembly and assembly by operators. This process is time-consuming and labor-intensive, making it difficult to improve the operational efficiency of gear pump performance testing.

[0009] Technical solution

[0010] To achieve the above objectives, the present invention provides the following technical solution:

[0011] This invention provides an automated test bench for the factory performance of a gear pump, including a test bench body for testing the performance of the gear pump. The test bench body includes an oil circuit unit with an oil outlet pipe and an oil return pipe leading out from the oil circuit unit. It also includes a horizontal support platform. The upper side of the support platform is provided with a retaining member for positioning and fixing the gear pump. The retaining member is provided with a rotating groove that is connected to the spindle key of the gear pump.

[0012] The clamping body is arranged parallel to the front side of the retainer. A linear sliding pair is provided at the bottom of the clamping body. The linear sliding pair is distributed perpendicularly to the retainer. An XY linear module is connected to the bottom of the linear sliding pair. The XY linear module is fixedly mounted on the support platform. A clamping groove is provided on the clamping body.

[0013] And a pair of sealing joints spaced apart on the left and right, each sealing joint including a support part and a rotating part, the interior of the support part and the rotating part forming a continuous oil passage, the main body of the support part being fitted with the clamping groove with clearance, the rotating part being rotatably disposed at one end of the support part, a rotating sealing assembly being provided at the interface between the rotating part and the support part, the rotating part being provided with a transmission gear structure, the pair of rotating parts being able to rotate synchronously through the transmission gear structure, wherein, the support part located on the left sealing joint is connected to the oil outlet pipe, and its rotating part is spirally connected to the inlet of the gear pump, the support part located on the right sealing joint is connected to the oil return pipe, and its rotating part is spirally connected to the outlet of the gear pump;

[0014] And an elastic support component is arranged parallel to the front side of the clamping body, the elastic support component can be deformed under pressure and elastically contact the clamping body.

[0015] Furthermore, the main body of the clamping body is a flat plate structure, the clamping groove is a truncated circular groove, the support part cannot rotate within the clamping groove, and a floating adjustment structure is provided between the support part and the clamping body.

[0016] Furthermore, the floating adjustment structure includes a limiting ring and a sliding plate. The limiting ring is fixed on the surface of the clamp body facing the retainer and is coaxially distributed with the tangent circular groove. The sliding plate is coaxially fixed on the support and can be coaxially and clearance-fitted within the limiting ring. The contact surfaces between the sliding plate and the clamp body are both ground and polished surfaces.

[0017] Furthermore, the support portion has an anti-detachment block detachably fixed on the other side of the clamping body, and when the sliding piece is attached to the surface of the clamping body, a gap is left between the anti-detachment block and the clamping body.

[0018] Furthermore, a gasket groove is formed at the interface between the support part and the rotating part. A connecting groove is formed inward from the gasket groove in the support part. Limiting protrusions are uniformly fixed on the inner side wall of the connecting groove. A spring groove is formed inward from the gasket groove in the rotating part. A protruding insertion pipe is formed along the oil passage on the side of the rotating part near the support part. A sealing thread is provided on the outer surface of the other end. The rotating sealing assembly is disposed in the connecting groove.

[0019] Furthermore, the rotating sealing assembly includes a stationary ring, a rotating ring, and a compression spring. The outer side of the stationary ring is provided with a limiting groove that matches the limiting protrusion. The stationary ring is non-rotatable and fits against the inner end of the mating groove. One side of the rotating ring is close to the stationary ring, and the other side is fitted with the insertion pipe through a sealing ring. One side of the compression spring is engaged in the spring groove, and the other side is elastically pressed against the rotating ring.

[0020] Furthermore, a connecting ring is provided on one side of the transmission gear structure, and a retaining ring is provided on the other side. Multiple threaded holes are evenly distributed on the outer surface of the connecting ring. A shoulder is formed on the outer side of the end of the support part. A planar thrust bearing is fitted on the shoulder. A connecting ring is fixed on the outer planar washer of the planar thrust bearing. The connecting ring is provided with connecting holes that correspond one-to-one with the threaded holes.

[0021] Furthermore, the transmission gear structure is a synchronous belt pulley, the clamp body is provided with a motor frame near the lower side, the motor frame is provided with a drive motor, the outer side of the drive motor is keyed to a drive pulley, and the drive pulley is linked to the two synchronous belt pulleys by a synchronous belt.

[0022] Furthermore, the linear motion pair includes an optical axis, a bearing seat, and a linear bearing. The lower side of the clamping body is symmetrically provided with through holes, and the linear bearing is fixed at the through holes. The optical axis passes through the linear bearing and is locked and fixed at both ends to the bearing seat.

[0023] Furthermore, the elastic support assembly includes a support frame, a support spring, a guide rod, and a support plate. Guide holes are provided on both sides of the support frame, and the guide rod is slidably connected within the guide holes. The end of the guide rod is connected to the support plate. The support spring is connected between the support plate and the support frame. When the clamping body moves within the linear motion pair, it can compress and deform the support spring. Beneficial effects

[0024] The technical solution provided by this invention has the following advantages compared with known public technologies:

[0025] This invention proposes an automated testing bench that improves upon existing gear pump performance testing benches by utilizing an innovatively designed synchronously rotating sealing joint as an intermediary connecting the oil circuit unit and the gear pump. Combined with the positioning function of the clamping body and the displacement capability of its bottom moving component, the oil outlet and return pipes of the oil circuit unit can be quickly and automatically connected and disconnected from the gear pump during gear pump performance testing. This eliminates the need for manual installation and disassembly of pipelines using tools, and also eliminates the need for manual screws to lock the gear pump to the retaining component. Using this solution, the number of tests per unit time is 2.4 times that of existing manual operations, significantly improving the operational efficiency of gear pump performance testing. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0027] Figure 1 This is a product diagram of a gear pump used in an experimental application in an embodiment of the present invention;

[0028] Figure 2 This is a side view of the overall automated test bench of the present invention;

[0029] Figure 3 This is a top view schematic diagram of the automatic clamping and positioning mechanism on the retainer of the present invention;

[0030] Figure 4 This is a rear perspective view of the automated assembly of the sealing joint of the present invention;

[0031] Figure 5 This is a front perspective view of the automated assembly of the sealing joint of the present invention;

[0032] Figure 6 This is an exploded view of the support portion and the rotating portion of the sealing joint of the present invention;

[0033] Figure 7 This is a schematic diagram of the assembly interior of the support portion and the rotating portion of the sealing joint of the present invention.

[0034] Figure 8 This is a perspective view of the rotating part of the present invention;

[0035] Figure 9 This is a perspective view of the support portion of the present invention;

[0036] Figure 10 This is a perspective view of the clamping body of the present invention;

[0037] Figure 11 This is a schematic diagram of the automatic connection process of the sealing joint to the gear pump according to the present invention;

[0038] The labels in the diagram represent: 10. Main body of the test bench; 11. Oil outlet pipe; 12. Oil return pipe; 13. Support platform; 14. Holding component; 141. Rotating groove; 142. Wedge groove; 143. Wedge block; 144. Pressure plate; 145. Positioning post; 146. Miniature hydraulic cylinder; 20. Clamping body; 21. Clamping groove; 22. Limiting ring; 23. Sliding plate; 231. Grinding and polishing surface; 24. Anti-detachment block; 25. Motor frame; 26. Synchronous belt; 27. Through hole; 30. Direct-acting moving pair; 31. Optical axis; 32. Shaft seat; 33. Linear bearing; 40. XY linear module; 50. Sealing joint; 51. Support part; 511. Connecting groove; 512. Limiting protrusion; 5 13. Shoulder; 52. Rotating part; 521. Spring groove; 522. Sealing threaded part; 523. Insert pipe; 524. Connecting ring; 525. Threaded hole; 53. Oil passage; 54. Rotary sealing assembly; 541. Stationary ring; 542. Rotary ring; 543. Compression spring; 55. Transmission gear structure; 56. Washer groove; 57. Flat thrust bearing; 571. Connecting ring; 572. Connecting hole; 60. Elastic support assembly; 61. Support frame; 62. Support spring; 63. Guide rod; 64. Support plate; 65. Guide hole; 70. Base plate; 80. Gear pump; 801. Liquid inlet; 802. Liquid outlet; 803. Mounting groove; 90. Drive wheel; 100. Drive motor. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0040] The present invention will be further described below with reference to embodiments. Example

[0041] This invention proposes an automated testing bench for the factory performance of gear pumps. The core design of this solution is to upgrade and improve the existing gear pump 80 performance testing benches through automation, thereby reducing workload and increasing the efficiency of gear pump 80 performance testing. In the improved equipment, during the installation and fixing of the gear pump 80 on the testing bench, the operator only needs to place the gear pump 80 in position; the automated structure designed in this solution will automatically install and fix the gear pump 80 and connect it to the oil circuit unit of the testing bench for experimentation.

[0042] The following is a detailed introduction to each component of the automated test bench:

[0043] First, the automated test bench includes a test bench body 10 for testing the performance of the gear pump 80. The test bench body 10 is a mature existing technology test equipment. The test bench body 10 includes an oil circuit unit, from which an oil outlet pipe 11 and an oil return pipe 12 are led out for corresponding connection with the inlet 801 and outlet 802 of the gear pump 80. It also includes a horizontal support platform 13. The upper side of the support platform 13 is provided with a retaining member 14 for positioning and fixing the gear pump 80. The retaining member 14 is provided with a rotating groove 141 that is keyed to the main shaft of the gear pump 80. A motor is provided behind the rotating groove 141 to cooperate with the rotation of the main shaft of the gear pump 80 to achieve the purpose of testing.

[0044] The principle and process of the test bench body 10 used to test the gear pump 80 have been explained in the background introduction above, and will not be repeated here.

[0045] The main body of the test bench (section 10) has multiple setting and adjustment panels, such as those for adjusting hydraulic oil pressure, motor speed, and transmission time. These are adjusted by the operators according to the pump's parameters. (Refer to...) Figure 1 For example, for the CBHZA-F28.2 hydraulic pump, the basic parameters set in the performance test are: speed 1500r / min, no-load pressure: ≤0.5MPa; loading pressure: rated E grade 16MPa, F grade 20MPa, G grade 25MPa, using No. 46 anti-wear hydraulic oil, etc.

[0046] In this plan, refer to Figure 2-3To achieve automatic positioning and fixation of the gear pump 80 on the retainer 14, an automatic clamping and positioning mechanism is added to the main body 10 of the test bench on the retainer 14. Referring to the figure, the scheme involves creating wedge-shaped grooves 142 collinearly on both sides of the rotating groove 141 of the retainer 14. The depth of the wedge-shaped grooves 142 decreases outward from the rotating groove 141. A wedge-shaped locking block 143 is slidably disposed within the wedge-shaped groove 142. A micro hydraulic cylinder 146 provides the driving force for the reciprocating movement of the wedge-shaped locking block 143 on its outer side. A protruding pressure plate 144 is formed at the relatively inner end of the wedge-shaped locking block 143. In addition, a protruding positioning post 145 is fixed between the wedge-shaped groove 142 and the rotating groove 141. The positioning post 145 is adapted to the mounting groove 803 of the gear pump 80, facilitating efficient and accurate placement of the gear pump 80 by the operator. During placement, the operator inserts the main shaft of the gear pump 80 into the rotating groove 141 and aligns the mounting grooves 803 on both sides with the positioning column 145. Under the push of the micro hydraulic cylinder 146, the wedge-shaped blocks 143 on both sides move toward the gear pump 80, and the pressure plate 144 moves from the upper to the lower side, pressing and fixing it at the mounting groove 803 of the gear pump 80.

[0047] The following are the core units of the designed automated structure, for reference. Figure 4-10 These components are mainly used so that after the gear pump 80 is fixed on the retainer 14, the oil outlet pipe 11 and the oil return pipe 12 of the oil circuit unit can be quickly and automatically connected and automatically disconnected from the gear pump 80, thereby improving the operational efficiency of the gear pump 80 in experimental testing.

[0048] It also includes an additional clamping body 20, on which a clamping groove 21 is provided. The clamping groove 21 is used to limit and fix the sealing joint 50 mentioned below. The clamping groove 21 is opened coaxially with the inlet 801 and outlet 802 of the gear pump 80 respectively. Therefore, the clamping body 20 used in the test is different for different types of gear pumps 80. The main body of the clamping body 20 is arranged parallel to the front side of the retainer 14. A direct-acting sliding pair 30 is provided at the bottom of the clamping body 20. The direct-acting sliding pair 30 is perpendicular to the retainer 14. The clamping body 20 can move a certain distance on the direct-acting sliding pair 30. The main body of the direct-acting sliding pair 30 is fixed on the bottom base plate 70. The non-powered translational capability of the direct-acting sliding pair 30 provides execution space for the automatic connection and automatic separation of the sealing joint 50 on the gear pump 80.

[0049] In addition, an XY linear module 40 is provided at the lower part of the linear moving pair 30. The XY linear module 40 is fixedly mounted on the support platform 13. The upper side of the XY linear module 40 is driven by a vertically distributed ball screw pair and a stepper motor as the drive source. It is mainly used to enable the clamping body 20 to have active displacement capability in the X and Y directions relative to the holding member 14.

[0050] It also includes a pair of sealing joints 50 spaced apart on the left and right. It is worth noting that the sealing joint 50 in this design is an innovative design, unlike the existing technology where two pipes rotate and seal within a single enclosure, failing to achieve the desired structural characteristics. Specifically, the sealing joint 50 includes a support portion 51 and a rotating portion 52. The support portion 51 and the rotating portion 52 form a continuous oil passage 53. The support portion 51 is fitted with a gap in the clamping groove 21, and the rotating portion 52 is rotatably positioned at one end of the support portion 51. A rotating sealing assembly 54 is provided at the interface between the rotating portion 52 and the support portion 51. The rotating portion 52 is equipped with a transmission gear structure 55. The pair of rotating portions 52 can rotate synchronously through the transmission gear structure 55. The support portion 51 of the left sealing joint 50 is connected to the oil outlet pipe... The oil outlet pipe 11 and the oil return pipe 12 of the oil circuit unit are connected by a spiral connection. The rotating part 52 of the oil outlet pipe 11 is spirally connected to the inlet 801 of the gear pump 80. The support part 51 of the right-side sealing joint 50 is connected to the return oil pipe 12, and its rotating part 52 is spirally connected to the outlet 802 of the gear pump 80. The design of the rotating part 52, which is externally fastened and rotates with the support part 51, combined with the design of the transmission gear structure 55 on the rotating part 52, is the core design feature that allows the two sealing joints 50 to rotate synchronously without interference within a small radial space. The ability of the two sealing joints 50 to rotate synchronously is the basic condition for realizing the rapid and automatic connection and disconnection of the oil outlet pipe 11 and the return oil pipe 12 of the oil circuit unit with the gear pump 80.

[0051] In addition, an elastic support assembly 60 is provided on the substrate 70, parallel to the front side of the clamp body 20. The elastic support assembly 60 can be deformed under pressure and elastically contact the clamp body 20, using restoring force to support the clamp body 20. The elastic support assembly 60 has two design functions: first, it provides a feeding thrust for the end of the sealing joint 50 to be rotatably fitted into the inlet 801 or outlet 802 of the gear pump 80; second, it can be used in conjunction with the floating adjustment structure described below to achieve rapid and efficient alignment of the end of the sealing joint 50 with the inlet 801 or outlet 802 of the gear pump 80.

[0052] This solution proposes an automated test bench. By automating the existing gear pump 80 performance test bench, an innovatively designed synchronously rotatable sealing joint 50 is used as an intermediate component connecting the oil circuit unit and the gear pump 80. Combined with the positioning function of the clamp 20 and the displacement capability of its bottom moving component, the oil outlet pipe 11 and return pipe 12 of the oil circuit unit can be quickly and automatically connected and disconnected from the gear pump 80 during the performance test. There is no need for manual installation and disassembly of pipelines with tools, nor is there a need for manual locking of the gear pump 80 to the retaining member 14 with screws. Using this solution, the number of tests per unit time for gear pump 80 performance testing is 2.4 times that of manual operation in the existing technology, which greatly improves the work efficiency of gear pump 80 performance testing.

[0053] The following describes the specific implementation methods used in the manufacturing process of this product:

[0054] Firstly, the main body of the clamping body 20 is a flat plate structure made of 12mm thick aluminum alloy and precision machined. The clamping groove 21 is designed as a chamfered circular groove. The support part 51 is non-rotatable within the clamping groove 21. A floating adjustment structure is provided between the support part 51 and the clamping body 20. The function of the floating adjustment structure is to enable the end of the sealing joint 50 to be quickly and efficiently aligned with the inlet 801 or outlet 802 of the gear pump 80 within a small error range. Due to machining and assembly errors between various structures, it is difficult for the sealing joint 50 in the clamping groove 21 to be precisely aligned with the inlet 801 or outlet 802 of the gear pump 80. The floating adjustment structure is designed to effectively compensate for this deficiency. Of course, the design and implementation of the floating adjustment structure also utilizes the sealing thread 522 of the sealing joint 50 and the chamfer made at the inlet 801 or outlet 802 of the gear pump 80, taking advantage of the automatic centering characteristics of the chamfered surface.

[0055] Specifically, the floating adjustment structure includes a limiting ring 22 and a sliding plate 23. The limiting ring 22 is fixed on the surface of the clamping body 20 facing the retaining member 14 and is coaxially distributed with the tangential groove. The sliding plate 23 is coaxially fixed to the support part 51 by screws. The sliding plate 23 can be coaxially and clearance-fitted within the limiting ring 22. In this embodiment, the coaxial clearance size is 0.5-1mm. Preferably, the contact surfaces between the sliding plate 23 and the clamping body 20 are both ground and polished surfaces 231. Lubricating oil is added between the contact surfaces during use. After adding lubricating oil, the friction coefficient between the ground and polished surfaces is only 0.05-0.10, which allows the sliding plate 23 pressed within the limiting ring 22 to slide smoothly, thereby driving the sealing joint 50 to move and align. An anti-detachment block 24 is fixed to the other side of the clamping body 20 by screws on the support part 51. When the sliding plate 23 is attached to the surface of the clamping body 20, a gap remains between the anti-detachment block 24 and the clamping body 20. The anti-detachment block 24 and the sliding plate 23 enable the fixed installation of the sealing joint 50 in the clamping groove 21 of the clamping body 20.

[0056] The execution steps for aligning the sealing joint 50 are as follows: After the sealing joint 50 is fixed on the clamp 20, the base plate 70 and its units are moved toward the gear pump 80 by the Y-direction movement of the XY linear module 40. Continuing to move in the Y direction, when the end of the sealing joint 50 is in contact with the gear pump 80, the clamp 20 and the sealing joint 50 on it move outward along the linear motion pair 30, squeezing the elastic support assembly 60. At this point, the linear motion pair 30 and the elastic support assembly 60 work together to achieve a "soft contact" between the sealing joint 50 and the inlet 801 or outlet 802 of the gear pump 80, avoiding direct rigid collision. Simultaneously, the reverse force of the elastic support assembly 60 is used to center the sealing joint 50 along the process chamfer, completing the alignment operation of the sealing joint 50. This also prepares for the subsequent spiral connection of the sealing joint 50.

[0057] In the design to achieve a rotatable seal between the support part 51 and the rotating part 52 of the sealing joint 50, a gasket groove 56 is formed at the interface between the support part 51 and the rotating part 52. A wear-resistant nylon gasket fits inside the gasket groove 56. Since the interface needs to maintain rotation, the gasket groove 56 is coated with lubricating grease during use. The support part 51 forms a mating groove 511 inward from the gasket groove 56. Limiting protrusions 512 are evenly fixed on the inner side wall of the mating groove 511. The rotating part 52 forms a spring groove 521 inward from the gasket groove 56. A protruding insertion pipe 523 is formed along the oil passage 53 on the side of the rotating part 52 near the support part 51, and a sealing threaded part 522 is provided on the outer surface of the other end. The rotating sealing assembly 54 is disposed in the mating groove 511. Both the support part 51 and the rotating part 52 are made of 304 stainless steel and are machined by a machining center.

[0058] The rotating sealing assembly 54 includes a stationary ring 541, a rotating ring 542, and a compression spring 543. The outer surface of the stationary ring 541 has a limiting groove that matches the limiting protrusion 512. The stationary ring 541 is non-rotatably fitted to the inner end of the mating groove 511. A sealing ring is provided at the mating surface of the stationary ring 541 and the inner end of the mating groove 511. One side of the rotating ring 542 is tightly fitted to the stationary ring 541, and the other side is fitted to the insertion pipe 523 through a sealing ring. One side of the compression spring 543 is engaged in the spring groove 521, and the other side is elastically pressed against the rotating ring 542. The rotating ring 542 and the stationary ring 541 can rotate relative to each other. A silicon carbide layer is provided at the contact surface between the rotating ring 542 and the stationary ring 541.

[0059] The above completes the rotational sealing structure of the support part 51 and the rotating part 52, which maintains a continuous oil passage 53 internally. To ensure a tight fit between the inner moving ring 542 and the stationary ring 541, the insertion pipe 523 needs to be pressed tightly against the sealing ring of the moving ring 542. Simultaneously, the compression spring 543 needs to be under pressure, using its rebound force to press the moving ring 542 and the stationary ring 541 together. Therefore, after completing the internal sealing rotation, it is also necessary to maintain a tight connection at the external joint between the support part 51 and the rotating part 52, both rotationally and axially. The specific design structure is as follows:

[0060] By providing a connecting ring 524 on one side of the transmission gear structure 55 and a retaining ring on the other side, and having multiple threaded holes 525 evenly distributed on the outer surface of the connecting ring 524, a shoulder 513 is formed on the outer side of the end of the support part 51. A planar thrust bearing 57 is fitted onto the shoulder 513, and a connecting ring 571 is fixed on the outer planar washer of the planar thrust bearing 57. The connecting ring 571 has connecting holes 572 that correspond one-to-one with the threaded holes 525. Bolts are passed through the connecting holes 572 into the screw holes of the connecting ring 524 and locked to achieve an axial fastening connection between the support part 51 and the rotating part 52. At the same time, the design of the shoulder 513 of the support part 51, the planar thrust bearing 57, and the connecting ring 571 enables the support part 51 and the rotating part 52 to rotate while being fastened together.

[0061] In the design that enables the rotating parts 52 of the two sealing joints 50 to rotate synchronously, in this embodiment, the transmission gear structure 55 is preferably a synchronous belt 26 pulley. At the same time, a motor frame 25 is provided near the lower side of the clamping body 20. A drive motor 100 is provided inside the motor frame 25. The drive motor 100 is a high-torque 57-type stepper motor. The drive wheel 90 is keyed to the outside of the drive motor 100. The drive wheel 90 is linked to the two synchronous belt 26 pulleys through the synchronous belt 26. The drive motor 100 drives the rotation of the drive wheel 90, and the synchronous belt 26 drives the rotating parts 52 of the two sealing joints 50 to rotate synchronously and in the same direction. With the elastic support component 60 continuously providing reverse thrust after the sealing joints 50 are aligned, and the clamping body 20 being able to move automatically in the linear motion pair 30, the sealing threaded parts 522 of the heads of the two sealing joints 50 can be easily connected to the inlet 801 or outlet 802 of the gear pump 80 respectively. When the sealing threaded parts 522 of the heads of the sealing joints 50 are separated from the inlet 801 or outlet 802 of the gear pump 80 respectively, the stepper motor reverses and utilizes the thread characteristics of the sealing threaded parts 522 to automatically disengage and separate them.

[0062] Specifically, in this embodiment, the linear motion pair 30 includes an optical shaft 31, a bearing seat 32, and a linear bearing 33. Symmetrical through holes 27 are provided on the lower side of the clamping body 20, and the linear bearing 33 is fixed at each through hole 27. The optical shaft 31 passes through the linear bearing 33, and both ends are locked and fixed to the bearing seat 32. This design facilitates easy replacement of the clamping body 20.

[0063] Meanwhile, the elastic support assembly 60 in this embodiment includes a support frame 61, a support spring 62, a guide rod 63, and a support plate 64. Guide holes 65 are provided on both sides of the support frame 61, and the guide rod 63 is slidably connected within the guide holes 65. The end of the guide rod 63 is connected to the support plate 64. The support spring 62 is connected between the support plate 64 and the support frame 61. When the clamping body 20 moves towards the support plate 64, it can compress and deform the support spring 62. The elastic coefficient of the support spring 62 should not be too large.

[0064] Combination Figure 11The following is a complete working process when using this solution for the performance test of gear pump 80: (When installing the two sealing joints 50 on the clamp 20), firstly, the operator inserts the main shaft of gear pump 80 into the rotating groove 141, and aligns its two side mounting grooves 803 with the positioning post 145. Then, under the push of the micro hydraulic cylinder 146, the wedge-shaped locking block 143 automatically presses and fixes the gear pump 80 onto the retaining member 14. (The magnetic switch on the micro hydraulic cylinder 146, used to detect the internal piston position, is used as a switch quantity to detect that the gear pump 80 has been pressed and fixed.) The XY linear module 40 is controlled to move in the Y direction, dragging the base plate 70 and its units toward the gear pump 80. The linear module in the Y direction stops after moving to a preset distance. During this period, The clamp 20 and its sealing joint 50 move outward along the linear sliding pair 30, and squeeze the elastic support assembly 60. The reverse force of the elastic support assembly 60 achieves the centering movement of the sealing joint 50 along the process chamfer, completing the alignment operation of the sealing joint 50. --- After the sealing joint 50 is aligned, the drive motor 100 is started to rotate forward. The drive motor 100 drives the rotation of the drive wheel 90, and the synchronous belt 26 drags the rotating parts 52 of the two sealing joints 50 to rotate synchronously and in the same direction. The elastic support assembly 60 continuously provides reverse thrust. The sealing threaded parts 522 of the two sealing joints 50 are spirally connected to the inlet 801 or outlet 802 of the gear pump 80, respectively. ---- (Manual execution part) The spindle motor of the test bench is started, and the gear pump 80 begins to run. According to the test requirements, the speed and load of the gear pump 80 can be adjusted to simulate the performance under different working conditions. ----After the simulation experiment, control the drive motor 100 to reverse, causing the two sealing joints 50 to separate from the gear pump 80, and control the synchronous control Y-direction linear module to move in the opposite direction, pulling the base and its components outward;---Release the wedge-shaped locking block 143, manually remove the gear pump 80, and the gear pump 80 performance test operation is completed.

[0065] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. An automated testing bench for the factory performance of a gear pump, characterized in that, include: The test bench body for testing the performance of gear pumps includes an oil circuit unit with an oil outlet pipe and an oil return pipe, and a horizontal support platform. The upper side of the support platform is provided with a retaining member for positioning and fixing the gear pump, and the retaining member is provided with a rotating groove that is connected to the spindle key of the gear pump. The clamping body is arranged parallel to the front side of the retainer. A linear sliding joint is provided at the bottom of the clamping body. The linear sliding joint is distributed perpendicularly to the retainer, and an XY linear module is connected to the bottom of the linear sliding joint. The XY linear module is fixedly mounted on the support platform. The clamping body is provided with a clamping groove. A pair of sealing joints spaced apart on the left and right sides, each sealing joint including a support part and a rotating part, the interior of the support part and the rotating part forming a continuous oil passage, the main body of the support part being fitted with the clamping groove with clearance, the rotating part being rotatably disposed at one end of the support part, a rotating sealing assembly being provided at the interface between the rotating part and the support part, the rotating part being provided with a transmission gear structure, the pair of rotating parts being able to rotate synchronously through the transmission gear structure, wherein the support part of the left sealing joint is connected to the oil outlet pipe, and its rotating part is spirally connected to the inlet of the gear pump, the support part of the right sealing joint is connected to the oil return pipe, and its rotating part is spirally connected to the outlet of the gear pump; An elastic support assembly is arranged parallel to the front side of the clamping body, and the elastic support assembly can be deformed under pressure and elastically contact the clamping body.

2. The automated test bench for the factory performance of a gear pump according to claim 1, characterized in that, The main body of the clamping body is a flat plate structure, the clamping groove is a truncated circular groove, the support part cannot rotate within the clamping groove, and a floating adjustment structure is provided between the support part and the clamping body.

3. The automated test bench for the factory performance of a gear pump according to claim 2, characterized in that, The floating adjustment structure includes a limiting ring and a sliding plate. The limiting ring is fixed on the surface of the clamp body facing the retainer and is coaxially distributed with the tangent circular groove. The sliding plate is coaxially fixed on the support and can be coaxially and clearance-fitted within the limiting ring. The contact surfaces between the sliding plate and the clamp body are both ground and polished surfaces.

4. The automated test bench for the factory performance of a gear pump according to claim 3, characterized in that, The support part has an anti-detachment block detachably fixed on the other side of the clamping body. When the sliding piece is attached to the surface of the clamping body, there is a gap between the anti-detachment block and the clamping body.

5. The automated test bench for the factory performance of a gear pump according to claim 1, characterized in that, A gasket groove is formed at the interface between the support part and the rotating part. A connecting groove is formed inward from the gasket groove in the support part. Limiting protrusions are uniformly fixed on the inner side wall of the connecting groove. A spring groove is formed inward from the gasket groove in the rotating part. A protruding insertion pipe is formed along the oil passage on the side of the rotating part near the support part. A sealing thread is provided on the outer surface of the other end. The rotating sealing assembly is disposed in the connecting groove.

6. The automated test bench for the factory performance of a gear pump according to claim 5, characterized in that, The rotating sealing assembly includes a stationary ring, a rotating ring, and a compression spring. The outer side of the stationary ring is provided with a limiting groove that matches the limiting protrusion. The stationary ring is non-rotatable and fits against the inner end of the mating groove. One side of the rotating ring is close to the stationary ring, and the other side is fitted against the insertion pipe through a sealing ring. One side of the compression spring is engaged in the spring groove, and the other side is elastically pressed against the rotating ring.

7. The automated test bench for the factory performance of a gear pump according to claim 5, characterized in that, The transmission gear structure has a connecting ring on one side and a retaining ring on the other side. The outer surface of the connecting ring is evenly distributed with multiple threaded holes. The outer side of the end of the support part forms a shoulder. A planar thrust bearing is fitted on the shoulder. A connecting ring is fixed on the outer planar washer of the planar thrust bearing. The connecting ring has connecting holes that correspond one-to-one with the threaded holes.

8. An automated test bench for the factory performance of a gear pump according to claim 1 or 7, characterized in that, The transmission gear structure is a synchronous belt pulley. The clamp body is provided with a motor frame near the lower side. The motor frame is equipped with a drive motor. The drive motor is keyed to the outside of the drive wheel. The drive wheel is linked to the two synchronous belt pulleys by a synchronous belt.

9. The automated test bench for the factory performance of a gear pump according to claim 8, characterized in that, The linear motion pair includes an optical axis, a bearing seat, and a linear bearing. The lower side of the clamping body has symmetrical through holes, and the linear bearing is fixed at the through holes. The optical axis passes through the linear bearing and is locked at both ends to the bearing seat.

10. The automated test bench for the factory performance of a gear pump according to claim 1, characterized in that, The elastic support assembly includes a support frame, a support spring, a guide rod, and a support plate. The support frame has guide holes on both sides, and the guide rod is slidably connected in the guide holes. The end of the guide rod is connected to the support plate. The support spring is connected between the support plate and the support frame. When the clamp moves in the linear motion pair, it can compress and deform the support spring.

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