Flywheel loading device for impact test of hydraulic pump and motor
By using a flywheel loading device to conduct impact tests on hydraulic pumps and motors using inertial force, the problems of excessive heat and low energy utilization caused by overflow valve loading were solved, achieving efficient energy recovery and system efficiency improvement.
Patent Information
- Application Number
- CN202511297722.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-11
- Publication Date
- 2025-11-18
AI Technical Summary
In existing hydraulic pump and motor impact tests, the overflow valve loading leads to excessive heat, increases costs, and results in low energy utilization, lacking energy recovery and reuse functions.
The flywheel loading device is used, which connects to the flywheel through the main shaft. The flywheel inertia generates an impact load, which is then applied in combination with inertial force. The structure is simple and the load can be flexibly adjusted. It also integrates energy recovery function.
Reduce power loss in the loading system, improve system efficiency, achieve energy recovery and reuse, and reduce the need for additional cooling devices.
Smart Images
Figure CN120971228A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application belongs to the technical field of impact test, and more particularly relates to a flywheel loading device for impact test of a hydraulic pump and motor. BACKGROUND
[0002] The hydraulic motor is also called oil motor, which converts the liquid pressure energy provided by the hydraulic pump into mechanical energy (torque and rotating speed) of the output shaft. The hydraulic pump is a power element of the hydraulic system, which is driven by an engine or a motor, sucks oil from the hydraulic oil tank, forms pressure oil, and discharges the pressure oil to an execution element. The hydraulic pump and motor are the most core components in the hydraulic transmission system, and the reliability thereof is crucial to the performance of the system. The performance of the hydraulic pump and motor under impact load can be verified through the impact test of the hydraulic pump and motor. At present, during the life durability test of the hydraulic pump and motor, an overflow valve is usually used as a loading device for system impact, and excessive heat is generated by the overflow valve loading, which causes serious heating problem of the hydraulic system, and an additional cooling device needs to be added, resulting in cost increase. In addition, the existing impact loading scheme does not have the function of energy recycling, and the energy utilization rate of the system is low. SUMMARY
[0003] The application aims to provide a flywheel loading device for impact test of a hydraulic pump and motor, which has a simple structure and can flexibly adjust the impact load according to different load conditions. During the loading process of the hydraulic pump and motor, the inertial force generated by the inertia of the flywheel can effectively reduce the loading power of the system, reduce the power loss of the system, and improve the efficiency of the system.
[0004] To solve the above technical problems, the technical scheme adopted by the application is as follows: a flywheel loading device for impact test of a hydraulic pump and motor, characterized by comprising a main shaft, a flange, a plurality of flywheels, a first bearing seat, an oil collecting groove, a liquid level relay, a third bearing seat, a box body, a workbench, a box cover, one end of the flange being fixedly connected to a measured motor, the other end of the flange being fixedly connected to the third bearing seat, one end of the main shaft being fixedly connected to a measured device through a shaft coupling, the main shaft penetrating and being rotatably connected to the third bearing seat, the other end of the main shaft being rotatably connected to the first bearing seat, the flywheels being located between the first bearing seat and the third bearing seat and being connected to the main shaft through an expansion sleeve, the first bearing seat and the third bearing seat being installed in the box body, the box cover covering the box body, the box body being fixedly connected to the top of the workbench, the oil collecting groove being arranged below the measured device, the liquid level relay being installed in the oil collecting groove, and the measured device being a hydraulic pump or a motor.
[0005] Preferably, a guide rail is arranged along the main shaft axis direction in the box, the sliding block is slidably connected to the guide rail, the first bearing seat is fixedly connected to the upper surface of the sliding block, the second bearing seat is also fixedly connected to the upper surface of the sliding block, one end of the lead screw is rotatably connected to the second bearing seat, the other end of the lead screw passes through and is screwed to the box, and the hand wheel is arranged outside the box and is fixedly connected to the lead screw.
[0006] Preferably, a Foma wheel is also arranged on the main shaft.
[0007] The beneficial effects generated by the above technical scheme are as follows: 1. The flywheel loading device of the application can be used to impact the flywheel as external load through the main shaft in the hydraulic pump and motor impact test, has simple structure, and can increase or reduce the number of flywheels to flexibly adjust the load according to different loading conditions.
[0008] 2. The flywheel loading device of the application can be used to impact the flywheel as external load through the main shaft in the hydraulic pump and motor impact test, can utilize the energy recovery effect of the inertia of the flywheel, and maximally improves the energy efficiency of the loading system.
[0009] 3. The flywheel loading device of the application can be used to impact the flywheel as external load through the main shaft in the hydraulic pump and motor impact test, and the peak power of the loading system can be reduced due to the inertia in the flywheel impact process. BRIEF DESCRIPTION OF DRAWINGS
[0010] Fig. 1 is a schematic diagram of the overall structure of the application; Fig. 2 is a schematic diagram of the structure of the flywheel box; In the figure: 1 is a measured device, 2 is a flange, 3 is a flywheel, 4 is a Foma wheel, 5 is a first bearing seat, 6 is a sliding block, 7 is a hand wheel, 8 is a lead screw, 9 is a guide rail, 10 is a second bearing seat, 11 is a liquid level relay, 12 is an oil collecting groove, 13 is a third bearing seat, 14 is a box, 15 is a workbench, and 16 is a box cover. DETAILED DESCRIPTION
[0011] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the application.
[0012] For example, Figs. 1-2As shown, a flywheel loading device for hydraulic pump, motor impact test, including spindle, flange 2, a number of flywheel 3, locking piece 4, first bearing seat 5, oil collecting tank 12, liquid level relay 11, third bearing seat 13, box 14, workbench 15, box cover 16. The measured device 1 is fixedly connected to the one end of flange 2, the other end of flange 2 is fixedly connected to the third bearing seat 13. The measured device 1 here is motor. The measured device 1 is fixedly connected to one end of the spindle through the shaft coupling, the spindle passes through and is rotatably connected to the third bearing seat 13. The other end of the spindle is rotatably connected to the first bearing seat 5. Flywheel 3 is located between the first bearing seat 5 and the third bearing seat 13 and is connected to the spindle through the expansion sleeve. The first bearing seat 5 and the third bearing seat 13 are both installed in the box 14, and the box cover 16 covers the box 14. During the test, the flywheel 3 is rotating, and the box 14 and the box cover 16 cover the flywheel 3 with a protective effect. The box 14 is fixedly connected to the workbench 15, and the oil collecting tank 12 is arranged below the measured device 1, and the liquid level relay 11 is installed in the oil collecting tank 12. The oil collecting tank 12 can collect the hydraulic oil leaked during the replacement of the motor and be recycled. The oil collecting tank 12 has the liquid level relay 11 for detecting the liquid level of the oil. The rotating speed of the flywheel 3 can be detected by using a Hall sensor.
[0013] A guide rail 9 is arranged in the box 14 along the spindle axis direction, a sliding block 6 is slidably connected to the guide rail 9, the first bearing seat 5 is fixedly connected to the sliding block 6, a second bearing seat 10 is also fixedly connected to the sliding block 6, one end of a lead screw 8 is rotatably connected to the second bearing seat 10, the other end passes through and is threadedly connected to the box 14, and a hand wheel 7 is arranged outside the box 14 and is fixedly connected to the lead screw 8. Rotating the hand wheel 7, the lead screw 8 drives the second bearing seat 10 and the sliding block 6 to slide along the guide rail 9, so that the second bearing seat 10 can be detached from the spindle, facilitating the subsequent disassembly and assembly of the flywheel 3. In the present application, the foma wheel 4 can be connected to the spindle through a connecting piece, the top of the connecting piece is a partial arc, supporting the spindle, and the foma wheel is connected to the bottom of the connecting piece.
[0014] During the movement of the second bearing seat 10, the foma wheel 4 installed on the spindle supports the spindle, making it more convenient for the second bearing seat 10 to be detached. The foma wheel 4 is only installed on the spindle when disassembling and assembling the flywheel 3, and the foma wheel 4 needs to be removed during the test. The measured motor rotates to drive the flywheel 3 to rotate, and the flywheel 3 generates impact on the spindle and the measured motor.
[0015] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent replacement or change within the technical range disclosed in the present application according to the technical solution and the inventive concept of the present application, which should be covered within the protection scope of the present application.
Claims
1. A flywheel loading device for impact testing of hydraulic pumps and motors, characterized in that, The device includes a main shaft, flange (2), several flywheels (3), a first bearing housing (5), an oil collection tank (12), a level relay (11), a third bearing housing (13), a housing (14), a worktable (15), and a housing cover (16). The motor under test (1) is fixedly connected to one end of the flange (2), and the other end of the flange (2) is fixedly connected to the third bearing housing (13). The device under test (1) is fixedly connected to one end of the main shaft through a coupling. The main shaft passes through and rotates to connect to the third bearing housing (13), and the other end of the main shaft rotates to connect to the third bearing housing (13). Connect the first bearing seat (5), the flywheel (3) is located between the first bearing seat (5) and the third bearing seat (13) and is connected to the main shaft through the expansion sleeve. The first bearing seat (5) and the third bearing seat (13) are both installed in the housing (14). The housing cover (16) covers the housing (14). The housing (14) is fixedly connected to the workbench (15). The oil collection tank (12) is set below the device under test (1). The liquid level relay (11) is installed in the oil collection tank (12). The device under test (1) is a hydraulic pump or motor.
2. The flywheel loading device for impact testing of hydraulic pumps and motors according to claim 1, characterized in that, A guide rail (9) is provided inside the housing (14) along the axis of the main shaft. The slider (6) is slidably connected to the guide rail (9). The first bearing seat (5) is fixedly connected to the slider (6). The second bearing seat (10) is also fixedly connected to the slider (6). One end of the lead screw (8) is rotatably connected to the second bearing seat (10), and the other end passes through and is threaded to the housing (14). The handwheel (7) is set outside the housing (14) and is fixedly connected to the lead screw (8).
3. The flywheel loading device for impact testing of hydraulic pumps and motors according to claim 1, characterized in that, A fuma wheel (4) is also installed on the main shaft.