A fatigue testing system for elevator components

Abstract

The utility model relates to the technical field of testing devices, and in particular to a fatigue testing system for elevator components. It includes: a servo pump station, a test host, and a control unit for setting test host parameters, the test host includes a double-column frame and an operating table, the double-column frame is fixedly connected to the operating table below, a crossbeam is arranged above the double-column frame, a crossbeam clamping oil cylinder is arranged at the connection between the crossbeam and the double-column frame, lifting oil cylinders are symmetrically arranged on both sides of the double-column frame, the crossbeam clamping oil cylinder and the lifting oil cylinder are connected to the servo pump station through an oil pipeline, and a hydraulic actuator is installed above the crossbeam; the control unit includes a hydraulic servo controller and measurement and control software, the measurement and control software is connected to the hydraulic servo controller, and the signal output end of the hydraulic servo controller is connected to the servo pump station. The technical solution of the utility model can accurately operate the test of elevator components and reduce the complexity of the use process.

Description

Technical Field

[0001] The utility model relates to the technical field of testing devices, in particular to an elevator component fatigue testing system. Background Art

[0002] In the prior art, elevators are an important means of public transportation, and their safety is of vital importance. In order to ensure the reliability and safety of elevators, countries and regions have formulated strict regulations and standards, and put forward requirements for the design, manufacture and installation of elevators and their components. Elevator components may face frequent stress and loads in long-term use, such as motors, wire ropes, wheel sets, guide rails, etc. These components need to undergo fatigue testing to evaluate their life and reliability under actual use conditions. The fatigue testing system can simulate the stress and load in the working environment of the elevator and perform long-term cycle testing on the components. The fatigue testing system is designed to help manufacturers and suppliers meet these requirements and provide reliable elevator components. However, since elevator components will face a variety of complex stress and load conditions in actual use, including the complexity and diversity of the test system during the test process, as well as possible equipment failures or operating errors, the test results have certain errors, affecting the accurate evaluation of component performance. At this stage, a fatigue testing system for elevator components is needed. Utility Model Content

[0003] In order to solve the problems of complex operation and low test result accuracy in an elevator component testing system, the utility model provides an elevator component fatigue testing system.

[0004] The utility model provides an elevator component fatigue testing system, which adopts the following technical solutions:

[0005] An elevator component fatigue test system, comprising: a servo pump station, a test host and a control unit for setting test host parameters, the test host comprising a double-column frame and an operating table, the double-column frame having an operating table fixedly connected below, a crossbeam arranged above the double-column frame, a crossbeam clamping oil cylinder being arranged at the connection between the crossbeam and the double-column frame, lifting oil cylinders being symmetrically arranged on both sides of the double-column frame, the lifting oil cylinders being fixedly connected to both ends of the crossbeam, the crossbeam clamping oil cylinder and the lifting oil cylinder being connected to the servo pump station via an oil pipeline, and a hydraulic actuator being installed above the crossbeam;

[0006] The control unit comprises a hydraulic servo controller and measurement and control software, wherein the measurement and control software is connected to the hydraulic servo controller, and a signal output end of the hydraulic servo controller is connected to a servo pump station.

[0007] Furthermore, pin holes are provided at both ends of the crossbeam, a pin shaft is provided at the upper end of the lifting cylinder, and the lifting cylinder is connected to the crossbeam via the pin shaft.

[0008] Furthermore, a crossbeam clamping cylinder is provided at the connection between the crossbeam and the double-column frame, including a baffle provided on the outer surface of one side parallel to the connection between the crossbeam and the double-column frame, the bottom of the crossbeam clamping cylinder is fixedly connected to the double-column frame, and the piston rod of the crossbeam clamping cylinder is connected to the baffle.

[0009] Furthermore, the hydraulic actuator adopts a double-rod piston symmetrical structure, a displacement sensor is installed inside the piston rod of the hydraulic actuator, and a force sensor is installed at the bottom end of the hydraulic actuator.

[0010] Furthermore, the servo pump station includes an oil inlet pipeline and an oil outlet pipeline. The servo pump station is connected to the upper side of the cylinder of the hydraulic actuator through the oil inlet pipeline, and the servo pump station is connected to the bottom end of the piston of the hydraulic actuator through the oil outlet pipeline.

[0011] Furthermore, the servo pump station also includes an oil pump motor group, and the oil pump motor group is provided with a vibration damping pad, and the vibration damping pad is installed inside the motor base of the oil pump motor group.

[0012] Furthermore, the signal output end of the hydraulic servo controller is connected to the servo pump station, including the oil pump motor group provided with a high-low pressure switching valve, and the signal output end of the hydraulic servo controller is connected to the signal input end of the high-low pressure switching valve.

[0013] Furthermore, the hydraulic servo controller includes a signal conditioning unit, which includes a gain adjuster and a filter. The hydraulic servo controller is connected to a displacement sensor and a force sensor through a sensor interface, the signal output end of the sensor interface is connected to the signal input end of the gain adjuster, and the signal input end of the gain adjuster is connected to the signal input end of the filter.

[0014] Furthermore, the measurement and control software is connected to the hydraulic servo controller, including a built-in PC measurement and control card in the hydraulic servo controller, and the measurement and control software is connected to the hydraulic servo controller via the PC measurement and control card.

[0015] Furthermore, the measurement and control software has a built-in signal generator.

[0016] In summary, the utility model has the following beneficial technical effects:

[0017] 1. The utility model adopts a servo pump station to connect the test host, which can provide stable and controllable hydraulic pressure. In fatigue testing, stable pressure control is crucial when performing cyclic load testing on elevator components. The servo pump station can ensure that constant hydraulic pressure is applied to the tested components to achieve accurate fatigue life assessment.

[0018] 2. The utility model uses a hydraulic servo controller to accurately control the test pressure, which reduces the complexity of operation, makes it highly accurate and has a fast response capability, and can achieve accurate load control on elevator components. By adjusting the parameters and settings of the hydraulic servo controller, the load conditions under actual working conditions can be accurately simulated to perform fatigue testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front view of a test part of an elevator component fatigue testing system according to an embodiment of the utility model.

[0020] Figure 2 It is an internal structure diagram of a hydraulic actuator in an elevator component fatigue testing system according to an embodiment of the utility model.

[0021] Figure 3 It is an overall connection schematic diagram of an elevator component fatigue testing system in an embodiment of the utility model.

[0022] Figure 4 It is an experimental data waveform diagram of the measurement and control software in the embodiment of the utility model.

[0023] Figure 5 It is another experimental data waveform diagram of the measurement and control software in the embodiment of the utility model.

[0024] Among them, 1. column frame; 2. hydraulic actuator; 21. displacement sensor; 22. fixing bolt; 23. support ring; 24. servo grid ring; 25. sealing ring; 3. crossbeam; 4. lifting cylinder; 5. force sensor; 6. fixing clamp; 7. operating table; 8. shock pad; 9. protection valve; 10. operating panel; 11. pressing base; 12. baffle. DETAILED DESCRIPTION

[0025] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0026] Example 1

[0027] Reference Figure 1 , an elevator component fatigue testing system of this embodiment includes:

[0028] A servo pump station, a test host, and a control unit for setting test host parameters, wherein the test host comprises a double-column frame and an operating table, the double-column frame is fixedly connected to the operating table below, a crossbeam is arranged above the double-column frame, a crossbeam clamping oil cylinder is arranged at the connection between the crossbeam and the double-column frame, lifting oil cylinders are symmetrically arranged on both sides of the double-column frame, the lifting oil cylinders are fixedly connected to both ends of the crossbeam, the crossbeam clamping oil cylinder and the lifting oil cylinder are connected to the servo pump station through an oil pipeline, and a hydraulic actuator is installed above the crossbeam;

[0029] The control unit comprises a hydraulic servo controller and measurement and control software, wherein the measurement and control software is connected to the hydraulic servo controller, and a signal output end of the hydraulic servo controller is connected to a servo pump station.

[0030] Pin holes are arranged at both ends of the crossbeam, a pin shaft is arranged at the upper end of the lifting cylinder, and the lifting cylinder is connected to the crossbeam through the pin shaft.

[0031] A crossbeam clamping cylinder is provided at the connection between the crossbeam and the double-column frame, including a baffle provided on the outer surface of one side parallel to the connection between the crossbeam and the double-column frame, the bottom of the crossbeam clamping cylinder is fixedly connected to the double-column frame, and the piston rod of the crossbeam clamping cylinder is connected to the baffle.

[0032] The hydraulic actuator adopts a double-rod piston symmetrical structure, a displacement sensor is installed inside the piston rod of the hydraulic actuator, and a force sensor is installed at the bottom end of the hydraulic actuator.

[0033] The servo pump station includes an oil inlet pipeline and an oil outlet pipeline. The servo pump station is connected to the upper side of the oil cylinder of the hydraulic actuator through the oil inlet pipeline, and the servo pump station is connected to the bottom end of the piston of the hydraulic actuator through the oil outlet pipeline.

[0034] The servo pump station also includes an oil pump motor group, and the oil pump motor group is provided with a vibration damping pad, and the vibration damping pad is installed inside the motor base of the oil pump motor group.

[0035] The signal output end of the hydraulic servo controller is connected to the servo pump station, including the oil pump motor group provided with a high-low pressure switching valve, and the signal output end of the hydraulic servo controller is connected to the signal input end of the high-low pressure switching valve.

[0036] The hydraulic servo controller includes a signal conditioning unit, which includes a gain regulator and a filter. The hydraulic servo controller is connected to a displacement sensor and a force sensor via a sensor interface, the signal output end of the sensor interface is connected to the signal input end of the gain regulator, and the signal input end of the gain regulator is connected to the signal input end of the filter.

[0037] The measurement and control software is connected to the hydraulic servo controller, including a built-in PC measurement and control card in the hydraulic servo controller, and the measurement and control software is connected to the hydraulic servo controller via the PC measurement and control card.

[0038] The measurement and control software has a built-in signal generator.

[0039] Specifically,

[0040] An elevator component fatigue testing system of this embodiment includes the following contents:

[0041] like Figure 1As shown, a hydraulic actuator 2 is provided on the crossbeam 3, and the hydraulic actuator 2 penetrates the crossbeam from top to bottom. The hydraulic actuator 2 adopts a double-rod piston symmetrical structure, and a force sensor 5 is installed at the connection between the bottom end of the piston rod and the upper end of the pressing base 11, which is used to detect the magnitude of the applied force in real time. The two ends of the crossbeam are inserted into the upper half of the column frame 1, and a crossbeam clamping cylinder is provided at the connection between the column frame 1 and the crossbeam. The bottom of the crossbeam clamping cylinder is fixedly connected to the double-column frame, and the piston rod of the crossbeam clamping cylinder is connected to the baffle 12. The crossbeam 3 is fixed by the crossbeam clamping cylinder. When the crossbeam 3 needs to move up and down, the piston rod of the crossbeam clamping cylinder is retracted to move away from the baffle 12. When the crossbeam is fixed, the crossbeam clamping cylinder abuts against the inner wall of the baffle 12. The column frame 1 adopts a two-column frame structure, and the effective spacing between the columns is 500mm. Two sets of lifting cylinders 4 are installed for the up and down movement of the beam. For the convenience of description, the positional relationships of "up", "down", "left", "right", "inside" and "outside" used in the utility model are based on the positional relationships shown in the attached drawings. For the operating platform 7 for fixing the elevator components, an integral steel part is used, which is finely machined and provided with a fixing clamp 6 for installing and fixing the tested steps, pedals and test fixtures. The effective height of the operating platform 7 is 600mm. A shock-absorbing pad 8 is installed under the operating platform 7. The shock-absorbing pad 8 is composed of a rubber pad and a pad iron to prevent the machine from vibrating significantly during operation and affecting the measurement results. A protective valve 9 is provided on the right side of the bottom of the test machine frame. The protective valve 9 is connected to the main power switch. The protective valve 9 is provided with a foot switch so that the operation of the test system can be stopped immediately in an emergency and the power supply of the test system can be quickly cut off to prevent accidents. An operating panel 10 is provided on the right side of the shell of the test host. The operating panel 10 includes a start / stop button, an alarm and indicator light and a loading force control button. The internal connection relationship of the operating panel is the prior art and will not be described in detail in this application.

[0042] like Figure 2 As shown, it is a diagram showing the internal structure of the hydraulic actuator. The hydraulic actuator is fixed to the lower surface of the crossbeam 3 by fixing bolts 22. A displacement sensor 21 is installed inside the piston rod of the hydraulic actuator to provide accurate position feedback information of the piston rod, so that the control system can understand the position of the piston rod in real time. Accurate position control and adjustment can be achieved to ensure that the movement of the hydraulic actuator reaches the expected target position. A sealing ring 25 is provided at the connection between the piston rod and the hydraulic cylinder, and a servo grid ring 24 is installed above the sealing ring. The overall sealing method is an imported servo grid ring, a sealing ring and a support ring 23. The support ring 23 can prevent the liquid in the hydraulic system from entering the support ring along the piston rod. The internal structure of the entire hydraulic actuator is compact, which effectively prevents dust and debris from entering and improves the life of the actuator.

[0043] like Figure 3 As shown, the whole system also includes a driving device for testing the host, wherein the measurement and control software is connected to the hydraulic servo controller, including a built-in PC measurement and control card in the hydraulic servo controller, the measurement and control software is connected to the hydraulic servo controller through the PC measurement and control card, and the servo controller is connected through the measurement and control software to perform motion control and debugging. The measurement and control software interface provides the functions of control buttons and parameter adjustment, adopts a full mouse operation interface, and sends instructions to the servo controller through the PC measurement and control card. The measurement and control software has the function of programmable test parameters. And multiple test steps can be set at one time, and various complex combination waveform tests can be completed at one time. The measurement and control software has a built-in signal generator for generating various analog signals in the measurement and control system. The measurement and control software interface is presented in the form of a graphical interface, providing a variety of waveform selection and parameter adjustment functions. Use the built-in signal generator in the measurement and control software to select the type of waveform to be generated, including sine wave, triangle wave, square wave, ramp wave and random wave. The specific operation mode selects the corresponding waveform according to actual needs. The frequency, amplitude, phase, offset and other parameters of the waveform are adjusted through the slider and input box on the measurement and control software interface. The built-in signal generator of the measurement and control software provides output control options and outputs the signal to the PC measurement and control card. The measurement and control software also realizes full digital PID control through digital signal processing technology, that is, the input signal and the control signal are digitally processed to achieve precise control. In addition, the measurement and control software also has full digital control functions of median adjustment and feedforward control. The median adjustment of the measurement and control software stabilizes the system output at the middle position of the target setting value. The measurement and control software automatically adjusts the control parameters according to the feedback signal and the target setting value of the system through the median adjustment algorithm, so that the system output remains in the middle position. The feedforward control of the measurement and control software is a method of predicting the disturbance signal in advance and making corresponding compensation control. By measuring the disturbance signal in advance and using it as input, the response of the system is pre-compensated, so as to better transmit the control signal and improve the performance and stability of the control system.

[0044] The hydraulic servo controller is a fully digital hydraulic servo controller based on the PCI bus, and its control methods include fully digital PID closed-loop control of force, displacement, and deformation. The hydraulic servo controller is communicatively connected with the servo pump station, including controlling the pressure and flow of the servo pump station through analog voltage or current signals. The servo pump station includes an oil inlet pipeline and an oil outlet pipeline. The servo pump station is connected to the upper side of the cylinder of the hydraulic actuator through the oil inlet pipeline, and the servo pump station is connected to the bottom end of the hydraulic actuator piston through the oil outlet pipeline. At the same time, the servo pump station is connected to the crossbeam clamping cylinder and the lifting cylinder through the oil delivery pipeline. By driving the hydraulic pump, mechanical energy is converted into hydraulic energy to provide the required hydraulic energy for the hydraulic system.

[0045] The specific operation method of the utility model is:

[0046] First, ensure that all components of the fatigue test system are intact and are inspected and maintained in accordance with the manufacturer's requirements. Ensure that the test equipment and safety measures are in good condition. After the preparations are completed, select the appropriate elevator component for testing, place the elevator component sample to be tested on the operating table 7 and fix the component with the fixing clamp 6 to ensure that the sample can be subjected to the correct load and stress. According to the test requirements, set the parameters of the fatigue test system through the measurement and control software, including loading force, frequency, number of cycles, etc. These parameters should be determined according to the design and use conditions of the elevator component to be tested, and start the test. Figure 4 As shown in the figure, the system will apply the test force and time according to the set parameters to draw a waveform diagram, simulate the working state of the elevator components in use, and record the data during the test. Figure 5 As shown, the measurement and control software draws a waveform diagram based on the displacement data and time detected by the displacement sensor. These data will be used to analyze and evaluate the fatigue performance of elevator components and evaluate the life and reliability of elevator components.

[0047] The above are all preferred embodiments of the present utility model, and are not intended to limit the protection scope of the present utility model. Therefore, any equivalent changes made based on the structure, shape, and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. An elevator component fatigue testing system, characterized in that: It includes a servo pump station, a test host and a control unit for setting parameters of the test host. The test host includes a double-column frame and an operating table. The double-column frame is fixedly connected to the operating table below, and a crossbeam is arranged above the double-column frame. The connection between the crossbeam and the double-column frame is provided with a crossbeam clamping cylinder. Lifting cylinders are symmetrically arranged on both sides of the double-column frame. The lifting cylinders are fixedly connected to both ends of the crossbeam. The crossbeam clamping cylinder and the lifting cylinder are connected to the servo pump station through an oil pipeline. A hydraulic actuator is installed above the crossbeam. The control unit comprises a hydraulic servo controller and measurement and control software, wherein the measurement and control software is connected to the hydraulic servo controller, and a signal output end of the hydraulic servo controller is connected to a servo pump station.

2. An elevator component fatigue testing system according to claim 1, characterized in that: Pin holes are arranged at both ends of the crossbeam, a pin shaft is arranged at the upper end of the lifting cylinder, and the lifting cylinder is connected to the crossbeam through the pin shaft.

3. An elevator component fatigue testing system according to claim 2, characterized in that: A crossbeam clamping cylinder is provided at the connection between the crossbeam and the double-column frame, including a baffle provided on the outer surface of one side parallel to the connection between the crossbeam and the double-column frame, the bottom of the crossbeam clamping cylinder is fixedly connected to the double-column frame, and the piston rod of the crossbeam clamping cylinder is connected to the baffle.

4. An elevator component fatigue testing system according to claim 1, characterized in that: The hydraulic actuator adopts a double-rod piston symmetrical structure, a displacement sensor is installed inside the piston rod of the hydraulic actuator, and a force sensor is installed at the bottom end of the hydraulic actuator.

5. An elevator component fatigue testing system according to claim 4, characterized in that: The servo pump station includes an oil inlet pipeline and an oil outlet pipeline. The servo pump station is connected to the upper side of the oil cylinder of the hydraulic actuator through the oil inlet pipeline, and the servo pump station is connected to the bottom end of the piston of the hydraulic actuator through the oil outlet pipeline.

6. An elevator component fatigue testing system according to claim 5, characterized in that: The servo pump station also includes an oil pump motor group, and the oil pump motor group is provided with a vibration damping pad, and the vibration damping pad is installed inside the motor base of the oil pump motor group.

7. An elevator component fatigue testing system according to claim 6, characterized in that: The signal output end of the hydraulic servo controller is connected to the servo pump station, including the oil pump motor group provided with a high-low pressure switching valve, and the signal output end of the hydraulic servo controller is connected to the signal input end of the high-low pressure switching valve.

8. An elevator component fatigue testing system according to claim 7, characterized in that: The hydraulic servo controller includes a signal conditioning unit, which includes a gain regulator and a filter. The hydraulic servo controller is connected to a displacement sensor and a force sensor via a sensor interface, the signal output end of the sensor interface is connected to the signal input end of the gain regulator, and the signal input end of the gain regulator is connected to the signal input end of the filter.

9. The elevator component fatigue testing system according to claim 1, characterized in that: The measurement and control software is connected to the hydraulic servo controller, including a built-in PC measurement and control card in the hydraulic servo controller, and the measurement and control software is connected to the hydraulic servo controller via the PC measurement and control card.

10. An elevator component fatigue testing system according to claim 9, characterized in that: The measurement and control software has a built-in signal generator.

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