High-temperature-resistant bending-resistant dynamic fatigue performance testing machine for elastic poly V-belt

Abstract

The utility model relates to multi-wedge belt testing equipment, in particular to a high-temperature-resistant bending-resistant dynamic fatigue performance testing machine for an elastic multi-wedge belt, which comprises a machine frame, a sliding component is arranged on the machine frame, two tensioning wheels, two idle wheels and a driven wheel are rotatably connected onto the sliding component, a driving motor and a driving wheel are further connected onto the machine frame, and the driving motor is connected with the driving wheel. The driving motor drives the driving wheel to rotate through a transmission part, the driving wheel is located on the upper portion of the tensioning wheel, and the idle wheel is located between the tensioning wheel and the driven wheel. According to the testing machine, the driving wheel is fixed, the tensioning wheel can be movably locked in the X-axis direction, the idle wheel can be moved and locked in the X-axis direction, the driven wheel can be moved in the Y-axis direction, a high-precision electronic platform scale is adopted to weigh a sample before and after a test, and therefore the testing machine has the advantages of testing the abrasion loss between the testing belt and the belt wheel, and is reasonable in structure, convenient to operate and high in practicability. And the test is more suitable for the actual use condition, and is worthy of popularization.

Description

Technical Field

[0001] The utility model relates to a multi-V belt testing device, in particular to a high temperature resistance and bending resistance dynamic fatigue performance testing machine for elastic multi-V belts. Background Art

[0002] The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.

[0003] Multi-V belt, also known as composite V-belt, is a new type of transmission belt. It is an annular belt with several longitudinal triangular wedges attached to the flat belt base. The wedge surface is the working surface. It has been widely used, especially for transmissions that require a large number of V-belts or when the wheel axis is perpendicular to the ground.

[0004] At present, the comprehensive reliability test of multi-V belts in my country is limited to fatigue life test, and there is no scientific overall grasp of systematic testing and evaluation, which makes it impossible for my country's multi-V belt products to form a scientific, systematic and complete product quality system, restricting the development of the industry. In order to solve the above problems and promote the high-quality development of the industry, a test machine for the high temperature resistance and bending resistance of elastic multi-V belts was designed and manufactured. At present, there is no such test machine on the market. Utility Model Content

[0005] In order to solve the deficiencies in the prior art, the utility model provides an elastic multi-V belt high temperature resistance and bending resistance dynamic fatigue performance testing machine. The testing machine has a reasonable structure, is easy to operate, and the test is more in line with actual use conditions, and is worthy of promotion.

[0006] The technical solution of the utility model is:

[0007] The utility model provides an elastic multi-V belt high temperature resistance and bending resistance dynamic fatigue performance testing machine, comprising a frame, the frame is provided with a sliding component, the sliding component is rotatably connected to two tensioning wheels, two idler wheels and a driven wheel, the frame is also connected to a driving motor and a driving wheel, the driving motor drives the driving wheel to rotate through a transmission component, the driving wheel is located on the upper part of the tensioning wheel, and the idler wheel is located between the tensioning wheel and the driven wheel.

[0008] Furthermore, the tensioning wheel and the driven wheel are both connected with counterweights for providing tensioning force thereto; and the idler wheel is connected with an adjusting device for adjusting the distance between the two idler wheels.

[0009] Furthermore, the adjustment device includes a forward and reverse T-shaped lead screw and a hand wheel, or a forward and reverse T-shaped lead screw and a stepping motor.

[0010] Furthermore, a lifting platform device for placing the counterweight is also provided at the bottom of the counterweight connected to the tensioning wheel, and the lifting platform device is connected to the frame.

[0011] Furthermore, the lifting platform device includes a platform, a lifting motor and a bracket, the platform is connected to the lifting motor, the lifting motor is installed on the bracket, and the bracket is connected to the frame.

[0012] Furthermore, the sliding component includes a first sliding part that can move along the X-axis direction and a second sliding part that can move along the Y-axis direction. The first sliding part is provided in two and arranged up and down. The tensioning wheel and the idler wheel are rotatably connected to a first sliding part in sequence from top to bottom, and the driven wheel is connected to the second sliding part.

[0013] The first sliding part and the second sliding part can both be structures composed of guide rails and sliders. The guide rails are connected to the frame, and the tensioning wheel and the idler wheel are rotatably connected to the sliders through mounting seats.

[0014] Furthermore, the frame includes a frame surrounded by transverse and longitudinal beams, a mounting plate installed on the frame, and a base plate installed on the same side of the mounting plate. The first sliding part is arranged on the mounting plate, and the second sliding part and the driving wheel are rotatably connected to the base plate. A plurality of clearance slots are opened on the base plate at positions corresponding to the moving stroke ranges of the tensioning wheel, the idler wheel, and the driven wheel, so that the tensioning wheel, the idler wheel and the driven wheel can pass through and move in the clearance slots.

[0015] Furthermore, a test chamber is provided on the front of the base plate, the driving wheel, the tensioning wheel, the idler wheel and the driven wheel are all located in the test chamber, a heating box and a circulating fan are provided in the test chamber, and a temperature sensor is also provided in the test chamber.

[0016] Furthermore, the driving motor is connected to a frequency converter, and the driving wheel and the driven wheel are both connected to speed sensors.

[0017] Furthermore, the testing machine also includes a controller, which is electrically connected to the frequency converter, the temperature sensor, and the speed sensor. The controller is also connected to a display to transmit the detection data to the display.

[0018] The beneficial effects achieved by the utility model are:

[0019] In order to meet the requirements of changing belt lengths of different specifications and changing belt transmission mechanisms of different equipment, the elastic multi-V belt high temperature and bending resistance dynamic fatigue performance testing machine has a fixed driving wheel, the tensioning wheel can be moved and locked in the X-axis direction, the idler wheel can be moved and locked in the X-axis direction, and the driven wheel can be moved in the Y-axis direction. A high-precision electronic scale is used to weigh the sample before and after the test, so as to test the wear between the test belt and the pulley. It has a reasonable structure, easy operation, and the test is more in line with actual usage, which is worthy of promotion.

[0020] The elastic multi-V belt high temperature resistance and bending resistance dynamic fatigue performance tester is based on the actual application of elastic multi-V belts in the home appliance industry and other high-speed running equipment. The tester performs continuous dynamic bending resistance under high temperature and normal temperature conditions to test the dynamic fatigue performance of elastic multi-V belts, such as wear resistance and bending crack resistance, when running at high speed. By weighing the sample before and after the test, the wear amount of the multi-V belt after high-speed operation and dynamic bending fatigue test, the change in belt length, the belt slip rate after constant tension, the belt cracking, and the belt elongation and strength of the sample before and after the test can be tested to determine the service life. It can also test the wear resistance of the tooth wedge and improve the bonding strength of the skeleton material after the test, providing reference data for research and improvement of product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the utility model.

[0022] Figure 2 It is a schematic diagram of the main structure of the utility model.

[0023] Figure 3 It is a structural schematic diagram of the utility model (the base plate is hidden).

[0024] Figure 4 It is a schematic diagram of the local structure of the utility model under a certain viewing angle.

[0025] Figure 5 It is a partial structural schematic diagram of the utility model from another viewing angle.

[0026] Figure 6 It is a schematic diagram of the base plate structure of the utility model.

[0027] Figure 7 It is a schematic diagram of the overall structure of the utility model.

[0028] In the figure, 100, rack; 110, frame; 120, mounting plate; 130, base plate; 140, side plate; 150, top plate; 200, sliding part; 210, first sliding part; 220, second sliding part; 300, tensioning wheel; 310, mounting seat; 400, idler wheel; 500, driven wheel; 600, driving wheel; 610, driving motor; 700, counterweight; 710, lifting platform device; 711, platform; 712, lifting motor; 713, bracket; 720, steel wire; 730, steering wheel; 800, adjusting device; 810, positive and negative T-type screw; 820, hand wheel; 900, insulation box; 1, elastic multi-V belt. DETAILED DESCRIPTION

[0029] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0030] It should be noted that when a component is referred to as being "mounted on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component at the same time. When a component is considered to be "fixed to" another component, it may be directly fixed on the other component or there may be a central component at the same time.

[0031] It should also be noted that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0032] like Figures 1 to 7As shown, the utility model provides an elastic multi-V belt high temperature resistance and bending resistance dynamic fatigue performance testing machine, including a frame 100. The frame 100 includes a frame 110 surrounded by transverse and longitudinal beams, and the frame 110 can be assembled from profiles or welded from steel pipes or channel steels. The frame 110 is connected to the mounting plate 120 by welding or threaded connection, and the frame 110 is detachably connected to the base plate 130, and the base plate 130 and the mounting plate 120 are located on the same side of the frame 110, and the base plate 130 is located in front of the mounting plate 120.

[0033] The mounting plate 120 is longitudinally connected with two first sliding parts 210 by threaded connection, two tensioning wheels 300 are connected to the upper first sliding part 210 to achieve movement and locking in the X-axis direction, and two idler wheels 400 are connected to the lower first sliding part 210 to achieve movement and locking in the X-axis direction. In this embodiment, the first sliding part 210 uses a guide rail and a slider, and the tensioning wheels 300 and the idler wheels 400 are both rotatably connected to the slider through the mounting seat 310. Further, the mounting seat 310 may include a bearing seat and a connecting plate, the bearing seat is fixed to the connecting plate by bolts, and the connecting plate is connected to the slider by bolts.

[0034] The top of the frame 110 is connected to the top plate 150 by welding or threaded connection, and the drive motor 610 is detachably connected to the top plate 150. The drive motor 610 drives the drive wheel 600 to rotate through a transmission device. In this embodiment, the transmission device uses a belt drive. The drive motor 610 is connected to a frequency converter, which is not shown in the figure. The drive wheel 600 is connected to a speed sensor, which is not shown in the figure. Specifically, the drive motor 610 can use a high-speed spindle motor, such as a high-speed spindle motor with a rotation speed of 8000rpm, and the speed is controlled by the frequency converter; the speed closed-loop control is performed through the speed sensor to achieve a continuous and stable test speed.

[0035] The driving wheel 600 is rotatably connected to the base plate 130 via the mounting seat 310 .

[0036] The back of the base plate 130 is connected to the second sliding part 220 by a threaded connection, and the driven wheel 500 is connected to the second sliding part 220 to achieve movement in the Y-axis direction. In this embodiment, the second sliding part 220 can be composed of a guide rail and a slider, the guide rail is connected to the base plate 130, and the driven wheel 500 is rotatably connected to the slider 212 through the mounting seat 310.

[0037] A plurality of clearance slots are provided on the base plate 130 at positions corresponding to the travel ranges of the tensioning wheel 300, the idler wheel 400, and the driven wheel 500, so that the tensioning wheel 300, the idler wheel 400, and the driven wheel 500 can pass through and move in the clearance slots. Figure 6As shown, in this embodiment, the clearance slot is configured as an elongated hole.

[0038] like Figure 1 As shown, the driving wheel 600 is located on the upper part of the tensioning wheel 300 , and the idler wheel 400 is located between the tensioning wheel 300 and the driven wheel 500 .

[0039] In order to adjust the tension, the two tensioning wheels 300 and the driven wheel 500 are connected with a counterweight 700 to provide the tension force of the belt. That is, the tension force of the tensioning wheel 300 and the driven wheel 500 is controlled by the weight loading of the tensioning wheel 300 and the driven wheel 500. Specifically, the two tensioning wheels 300 are connected with a counterweight 700 to provide the tension force in the X-axis direction; the driven wheel 500 is connected with a counterweight 700 to provide the tension force in the Y-axis direction.

[0040] Furthermore, if Figure 4 , 5 As shown, the mounting base 310 connected to the tensioning wheel 300 is also connected to a weight loading connector extending backward, the weight loading connector is fixedly connected to one end of a steel wire 720, and the other end of the steel wire 720 is connected to a counterweight 700. A steering wheel 730 is provided between the tensioning wheel 300 and the counterweight 700 to adjust the direction of the steel wire 720. The steering wheel 730 is connected to the frame 110, and the counterweight 700 can adjust the weight of the weight according to the required tensioning force.

[0041] Furthermore, a weight connector extending backward is connected to the mounting seat 310 connected to the driven wheel 500, and a counterweight 700 is connected to the weight connector. The counterweight 700 can adjust the weight of the weight according to the required tension. A displacement sensor is installed on the side of the driven wheel 500, which is not shown in the figure, for realizing the detection of the center distance between the master and the driven wheel. Speed ​​sensors are installed on the driving wheel 600 and the driven wheel 500, which are not shown in the figure.

[0042] like Figure 4 , 5 As shown, the idler wheel 400 is also connected with an adjusting device 800 for adjusting the distance between the two idler wheels 400, and the distance between the two idler wheels 400 is adjustable to ensure the wrap angle between the driving wheel 600 and the multi-V belt. The adjusting device 800 includes a forward and reverse T-shaped lead screw 810 and a hand wheel 820, or a forward and reverse T-shaped lead screw 810 and a stepping motor.

[0043] In this embodiment, a screw nut is connected to the mounting seat 310 connected to the idler wheel 400, a screw nut bearing seat is connected to the mounting plate 120, and the positive and negative adjustment screw passes through and is rotatably connected to the screw nut bearing seat and the screw nut. A hand wheel 820 is also connected to one end of the adjustment screw, and the rotation of the hand wheel 820 drives the adjustment screw to rotate synchronously. The hand wheel 820 can also be replaced by a stepper motor, the output shaft of the motor is connected to one end of the adjustment screw, and the rotation of the stepper motor drives the adjustment screw to rotate synchronously.

[0044] In order to facilitate the adjustment of the weight of the counterweight 700 , a lifting platform device 710 for placing the counterweight 700 is provided at the bottom of the counterweight 700 connected to the tensioning wheel 300 . The lifting platform device 710 is connected to the frame 100 and can move up and down.

[0045] Specifically, the lifting platform device 710 includes a platform 711, a lifting motor and a bracket 713, the platform 711 is connected to the lifting motor, the lifting motor is installed on the bracket 713, and the bracket 713 is connected to the frame 100 by a threaded connection, specifically, on the left and right sides of the frame 100.

[0046] A test chamber is provided on the front of the base plate 130. The driving wheel 600, the tensioning wheel 300, the idler wheel 400 and the driven wheel 500 are all located in the test chamber. The test chamber is wrapped by a shell to form an insulated box 900. Specifically, the insulated box 900 can be fixedly connected to the base plate 130 by screw connection. A heater and a circulating fan are provided in the insulated box 900, and a temperature sensor is also provided in the insulated box 900.

[0047] The test machine of the utility model also includes a controller, specifically, the controller is a PLC control, the controller is electrically connected to the frequency converter, the temperature sensor, the speed sensor, the displacement sensor, the heater, the circulating fan, and the controller is also connected to the display to transmit the detection data to the display.

[0048] Specifically, the whole machine adopts computer and Siemens PLC communication mode for program control, and the display is used for human-computer dialogue to achieve humanized design. The setting of each test time, CD reading, real-time speed of the driving wheel, real-time speed of the driven wheel 500, and test environment temperature of the whole test process can be set and displayed by operating the computer test screen, and the actual data can be displayed, and the test data can be recorded, saved, and the test report can be printed. Set the temperature of the incubator 900 on the upper computer test screen, press the start button, the heater in the incubator 900 starts heating, the temperature in the incubator 900 is detected by the temperature sensor in the incubator 900, and the temperature in the incubator 900 is made uniform by the circulating fan of the incubator 900. The temperature is stabilized and balanced by PLC control, and the heater in the incubator 900 stops heating and no longer controls the temperature. The speed of the driving wheel 600 is set on the upper computer test screen. The PLC controls the output of the corresponding signal to the inverter according to the set speed. The inverter controls the high-speed spindle motor to operate. During the operation, the real-time speed of the driving wheel 600 is collected by the speed sensor set on the driving wheel. The PLC adjusts the output according to the collected real-time speed of the driving wheel 600, so that the high-speed spindle motor controlled by the inverter operates at the set speed, realizing the closed-loop control of the driving wheel speed. Set the test running time h and running time m on the upper computer test screen, that is, set the total time of the entire test to minutes. After the test starts, when the set running time is reached, the equipment automatically saves the real-time value of the center distance of the driving and driven wheels 500 and then stops. Set the stage running time on the upper computer test screen, that is, through the set stage running time, the real-time value of the center distance of the driving wheel 600 and the driven wheel 500 can be automatically saved when the running time is reached, or the real-time value of the center distance of the driving wheel 600 and the driven wheel 500 can be automatically saved after reaching the set stage running time and then stopped (depending on the specific needs). Before the test begins, measure the initial belt weight of the sample, which is the weight of the sample before the test begins. After weighing with a high-precision electronic scale, manually input it, and it will be displayed in the experimental report. After the test ends, measure the final belt weight of the sample again, which is the weight of the sample after the test ends. After weighing with a high-precision electronic scale, manually input it, and it will be displayed in the experimental report. Test the belt wear data through the weighing results to determine the belt wear and belt quality. Measure the center distance between the driving wheel 600 and the driven wheel 500 through the displacement sensor of the driven wheel 500, and measure the real-time speed of the driving wheel 600 and the driven wheel 500 through the speed sensors of the driving and driven wheels 500. If the belt breaks during the test, the speed of the driving wheel remains unchanged, but the speed of the driven wheel 500 will drop suddenly until it reaches a stopped state. When a sudden change in the real-time speed of the driven wheel 500 is detected, it is determined to be a broken belt. At this time, the real-time value of the center distance between the driving and driven wheels 500 is automatically saved and then shut down.

[0049] The working process of the testing machine of the utility model:

[0050] Before the test, use a high-precision electronic scale to measure the initial weight of the sample. According to the sample specifications, install each pulley (driving pulley 600, tensioning pulley 300, driven pulley 500) in the corresponding position in advance, adjust the idler pulley 400 to a smaller position, hang the sample, hang the weight of the tensioning pulley 300, hang the counterweight 700 on the driven pulley 500, and adjust the position of the idler pulley 400 through the hand wheel 820 to make the position of each pulley meet the test requirements. Turn on the heating function of the incubator 900. The heater and circulating fan in the incubator 900 make the temperature in the box balanced and stable. When the set temperature is reached, the test can be started. Powered by a high-speed spindle motor, the drive wheel is controlled by a frequency converter to achieve variable frequency adjustment of 6000-8000R / MIN. During the test, the two tensioning wheels 300 always provide tension in the X-axis direction, and the driven wheel 500 provides tension in the Y-axis direction. During the test, the speed sensors of the drive and driven wheels 500 display the speed of the drive and driven wheels 500 in real time, and adjust the speed of the drive and driven wheels to operate at the set speed. During the test, the center distance and speed of the drive and driven wheels 500 are displayed in real time, and the data is saved at a fixed time. When the set test time is reached or there is an unexpected situation such as belt breakage, the equipment automatically saves the data and shuts down. After the test, the end belt weight of the sample is measured again using a high-precision electronic scale. According to the initial belt weight and the end belt weight, the wear amount of the sample can be calculated to determine the service life of the sample.

[0051] The above-described implementation methods of the utility model do not constitute a limitation on the protection scope of the utility model. Any modification, equivalent replacement and improvement made within the spirit and principle of the utility model shall be included in the protection scope of the claims of the utility model.

Claims

1. An elastic multi-V belt high temperature resistance and bending resistance dynamic fatigue performance testing machine, comprising a frame (100), characterized in that: The frame (100) is provided with a sliding component (200), and two tensioning wheels (300), two idler wheels (400) and a driven wheel (500) are rotatably connected to the sliding component (200). The frame (100) is also connected with a driving motor (610) and a driving wheel (600), and the driving motor (610) drives the driving wheel (600) to rotate via a transmission component. The driving wheel (600) is located on the upper part of the tensioning wheel (300), and the idler wheel (400) is located between the tensioning wheel (300) and the driven wheel (500).

2. The elastic multi-V belt high temperature resistance and bending resistance dynamic fatigue performance testing machine according to claim 1, characterized in that: The tension wheel (300) and the driven wheel (500) are both connected to a counterweight (700) for providing tensioning force thereto; and the idler wheel (400) is connected to an adjustment device (800) for adjusting the distance between the two idler wheels (400).

3. The elastic multi-V belt high temperature resistance and bending resistance dynamic fatigue performance testing machine according to claim 2, characterized in that: The adjustment device (800) comprises a forward and reverse T-shaped lead screw (810) and a hand wheel (820), or a forward and reverse T-shaped lead screw (810) and a stepping motor.

4. The elastic multi-V belt high temperature resistance and bending resistance dynamic fatigue performance testing machine according to claim 2, characterized in that: A lifting platform device (710) for placing the counterweight (700) is also provided at the bottom of the counterweight (700) connected to the tension wheel (300); the lifting platform device (710) is connected to the frame (100).

5. The elastic multi-V belt high temperature resistance and bending resistance dynamic fatigue performance testing machine according to claim 4, characterized in that: The lifting platform device (710) comprises a platform (711), a lifting motor and a bracket (713); the platform (711) is connected to the lifting motor, the lifting motor is installed on the bracket (713), and the bracket (713) is connected to the frame (100).

6. The elastic multi-V belt high temperature resistance and bending resistance dynamic fatigue performance testing machine according to claim 1, characterized in that: The sliding component (200) comprises a first sliding part (210) movable along the X-axis direction and a second sliding part (220) movable along the Y-axis direction. The first sliding parts (210) are provided in two numbers and arranged up and down. The tensioning wheel (300) and the idler wheel (400) are rotationally connected to a first sliding part (210) in sequence from top to bottom. The driven wheel (500) is connected to the second sliding part (220).

7. The elastic multi-V belt high temperature resistance and bending resistance dynamic fatigue performance testing machine according to claim 6, characterized in that: The frame (100) comprises a frame (110) surrounded by transverse and longitudinal beams, a mounting plate (120) mounted on the frame (110), and a base plate (130) mounted on the same side of the mounting plate (120); the first sliding portion (210) is arranged on the mounting plate (120); the second sliding portion (220) (200) and the driving wheel (600) are rotatably connected to the base plate (130); and a plurality of clearance slots are provided on the base plate (130) at positions corresponding to the moving travel ranges of the tensioning wheel (300), the idler wheel (400), and the driven wheel (500).

8. The elastic multi-V belt high temperature resistance and bending resistance dynamic fatigue performance testing machine according to claim 7, characterized in that: A test chamber is arranged on the front of the base plate (130); the driving wheel (600), the tensioning wheel (300), the idler wheel (400) and the driven wheel (500) are all located in the test chamber; a heater and a circulating fan are arranged in the test chamber; and a temperature sensor is also arranged in the test chamber.

9. The elastic multi-V belt high temperature resistance and bending resistance dynamic fatigue performance testing machine according to claim 8, characterized in that: The driving motor (610) is connected to a frequency converter; the driving wheel (600) and the driven wheel (500) are both connected to speed sensors; and the driven wheel (500) is connected to a displacement sensor.

10. The elastic multi-V belt high temperature resistance and bending resistance dynamic fatigue performance testing machine according to claim 9, characterized in that: The testing machine also includes a controller, which is electrically connected to a frequency converter, a temperature sensor, a speed sensor, a displacement sensor, a heater, and a circulating fan. The controller is also connected to a display to transmit the detection data to the display.

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