Torque rapid fatigue simulation testing machine for transmission belt

Abstract

The utility model discloses a transmission belt torque rapid fatigue simulation testing machine, which comprises a rack, a load motor is arranged at one end in the rack, and a main transmission high-speed main shaft motor is arranged on one side of the load motor; the top of the other end of the rack is also provided with a placing rack, and the placing rack is also provided with a weight loading structure; the driving wheel is arranged on the top end face of the rack in a sliding mode, a transmission assembly is further arranged between the rack and the driving wheel, and the main transmission high-speed spindle motor is in transmission connection with the driving wheel; the testing machine performs loading force control operation through a main transmission high-speed main shaft motor and a load motor, so that a test sample is subjected to a torque fatigue test, and an electric sealing energy-saving effect is realized; the driving wheel is combined with a linear guide rail through a rolling shaft lead screw to perform horizontal displacement; the sample completes preset operation time under the set tension and load; the equipment can fix the center distance and tension, and test the sliding rate and transmission power attenuation of the transmission belt.

Description

Technical Field

[0001] The utility model belongs to the technical field of fatigue simulation testing, and in particular relates to a transmission belt torque rapid fatigue simulation testing machine. Background Art

[0002] At present, fatigue testing machines for elastic multi-V belts and elastic toothed V-belts at home and abroad basically use elastic multi-V belts to conduct various performance tests during actual transmission of the equipment. Due to the high service life requirements of elastic multi-V belts, the use of the belts and the service life of the belts can only be judged after 160 to 200 days of testing, which causes a long judgment time for both the users and manufacturers of the belts. The delay time for adjusting the production formula of the belts and improving the production process is too long. There is no feedback from measured data, which leads to misjudgment and a high difficulty coefficient for improvement. Therefore, there are great limitations in actual use and there is room for improvement. Utility Model Content

[0003] The purpose of the utility model is to provide a transmission belt with torque rapid fatigue simulation testing machine to solve the problems raised in the above background technology that during detection, the detection result delay time is too long, there is no feedback of measured data, it is easy to cause misjudgment, and there is a high difficulty coefficient for improvement.

[0004] To achieve the above purpose, the utility model provides the following technical solutions: a transmission belt with torque rapid fatigue simulation testing machine, comprising

[0005] A frame, a load motor is installed at one end of the frame, and a main transmission high-speed spindle motor is arranged on one side of the load motor; a placement rack is also installed on the top of the other end of the frame, and a weight loading structure is also arranged on the placement rack;

[0006] The driving wheel is slidably arranged on the top surface of the frame, and a transmission assembly is also arranged between the frame and the driving wheel. The main transmission high-speed spindle motor is connected to the driving wheel in a transmission manner, and

[0007] A driven wheel is installed at one end of the top of the frame, and the load motor is connected to the driven wheel through a belt;

[0008] A transmission shaft passes through the inside of the driving wheel and the driven wheel, and both ends of the transmission shaft extend to the outside of the driving wheel and the driven wheel. An eccentric mass part is fixed to the end of the transmission shaft at one end of the driven wheel, and a sample is sleeved on the eccentric mass part and one end of the transmission shaft in the driving wheel.

[0009] Preferably, the transmission assembly includes a linear slide rail symmetrically installed on the top surface of the frame, and a roller screw arranged in the linear slide rail, both ends of the roller screw are provided with bearing seats installed on the end surface of the frame, the roller screw is connected to the internal thread of the bottom end of the driving wheel, and the linear slide rail is slidably connected to the bottom end surface of the driving wheel.

[0010] Preferably, a locking assembly is also installed at the end of the roller screw, which includes a mounting plate installed on the side of the frame placement rack and a locking cylinder installed on the mounting plate. The output end of the locking cylinder is fixed with a locking belt sleeved on the end of the roller screw. A limit clamp column is also installed on the mounting plate. The locking belt passes around the roller screw and is fixed in the limit clamp column. A motor is provided on the sliding rod in the placement rack, and a synchronous wheel is also installed at the end of the roller screw. A synchronous belt is sleeved between the synchronous wheel at this position and the output end of the motor. The weight loading structure is connected to the motor, and the height of the motor can be adjusted through the weight loading structure, thereby achieving the tension of the synchronous belt at this position.

[0011] Preferably, a vibration sensor is installed on the side of the driven wheel away from the driving wheel, a pulley is installed on the other end of the transmission shaft in the driven wheel, the pulley is connected to the load motor through a belt, and a torque sensor is also arranged at the end of the transmission shaft.

[0012] Preferably, a pulley is installed at the other end of the transmission shaft in the driving wheel, and the pulley is connected to the main transmission high-speed spindle motor through a belt.

[0013] Preferably, speed sensors are installed on both the driving wheel and the driven wheel, and the detection ends of the speed sensors are located at the pulley positions of the driving wheel and the driven wheel.

[0014] Preferably, a damping shock absorber is also installed at the bottom end surface of the frame.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The testing machine controls the loading force through the main transmission high-speed spindle motor and the load motor, so that the specimen is subjected to torque fatigue test and the energy-saving effect of electric closure is achieved; the driving wheel is horizontally displaced by the combination of roller screw and linear guide; the specimen completes the predetermined running time under the set tension and load; the equipment can set the center distance and tension to test the slip rate and transmission power attenuation of the transmission belt; it can also apply constant tension to test the slip rate and transmission power attenuation; the service life of the transmission belt is calculated based on the test data and simulation software, and rapid testing is achieved to shorten the test cycle; the test can be paused at any time during the experiment to observe the status of the transmission belt and understand the aging, elongation and damage degree of the transmission belt at different usage times; the machine has belt break detection, center distance change rate and slip rate detection; it automatically stops when the limit is exceeded or the belt is broken, and the data is saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front view of the utility model;

[0018] Figure 2It is a rear view of the utility model;

[0019] Figure 3 It is a top view of the utility model;

[0020] Figure 4 For this utility model Figure 1 A magnified schematic diagram of area A in the middle.

[0021] In the figure:

[0022] 100, frame; 101, load motor; 102, main transmission high-speed spindle motor; 103, weight loading structure;

[0023] 200, driving wheel; 201, locking cylinder; 202, limit clamping column; 203, mounting plate; 204, locking belt;

[0024] 300, driven wheel; 301, eccentric mass member; 302, vibration sensor; 303, torque sensor;

[0025] 400, speed sensor;

[0026] 500. Transmission assembly. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] See also Figures 1 to 4 The utility model provides a technical solution: a transmission belt with torque rapid fatigue simulation testing machine, including

[0029] A load motor 101 is installed at one end of the frame 100, and a main transmission high-speed spindle motor 102 is arranged on one side of the load motor 101; a placement rack is also installed on the top of the other end of the frame 100, and a weight loading structure 103 is also arranged on the placement rack to load a fixed tension through the weight;

[0030] The driving wheel 200 is slidably arranged on the top surface of the frame 100, and a transmission assembly 500 is also arranged between the frame 100 and the driving wheel 200, and the driving wheel 200 is driven by the transmission assembly 500 to move horizontally on the top surface of the frame 100, and the main transmission high-speed spindle motor 102 is connected to the driving wheel 200, and

[0031] The driven wheel 300 is installed at one end of the top of the frame 100. The load motor 101 is connected to the driven wheel 300 through a belt. The rotation speed, rotation time and rotation direction of the driven wheel 300 and the driving wheel 200 are controlled by the load motor 101 and the main transmission high-speed spindle motor 102 respectively to realize the simulation test of the sample. The main transmission high-speed spindle motor 102 and the load motor 101 are used to control the loading force so that the sample is subjected to a torque fatigue test, that is, a braking force opposite to the rotation speed is given by the load motor 101 to realize torque loading and achieve the energy-saving effect of electric closure. The load motor 101 is braked, and the braking power generation is fed back to the power grid through the DC speed regulator. The slip rate of the belt in the driving wheel 200 can be tested under the condition of fixed center distance and fixed tension of weight. When the rotation speeds of the driving wheel 200 and the driven wheel 300 are different, the slip rate is generated. The basic formula of the slip rate is: The slip rate is calculated according to formula (1):

[0032]

[0033] Where:

[0034] ε——slip rate (%);

[0035] n1——driving wheel speed, in revolutions per minute (r / min);

[0036] n2——driven wheel speed, in revolutions per minute (r / min). ; Since the pulley diameters of the driving wheel 200 and the driven wheel 300 are different, the slip rate formula needs to add the diameter ratio of the driving and driven wheels 300, so the formula evolves to ε=(1-n2 / n1*d2 / d1)*100%) where d1 is the diameter of the driving wheel 200 and d2 is the diameter of the driven wheel 300; the torque sensor in the driven wheel 300 device detects data, and the transmission power is attenuated;

[0037] The service life of the transmission belt is calculated based on the test data and simulation software, and the torque sensor sample is quickly tested to complete the predetermined running time under the set tension and load; the equipment can set the center distance and tension; centralized center distance setting means locking the driving wheel 200 after moving to the position. Since the driven wheel 300 is fixed, the center distance will no longer change after the driving wheel 200 is locked. The fixed tension is not locking the driving wheel 200, and the fixed tension is loaded by the weight. At this time, the driving wheel 200 is movable and the center distance is variable. The slip rate and transmission power attenuation of the transmission belt are tested. After locking the driving wheel 200 to fix the center distance, the driven wheel 300 is loaded with torque during the test, and the speed of the driven wheel 300 will be reduced accordingly to detect the slip rate of the transmission belt. During the test, if the slip rate is fixed, that is, the master and slave speeds are fixed, the torque loading of the driven wheel 300 needs to be reduced accordingly. According to the transmission power formula: P≈TN / 9549, where P is the transmission power, T is the torque and N is the speed, constant tension can also be applied. , that is, the weight is added to the driving wheel 200 through the weight loading structure 103. During the test, the weight no longer changes or increases or decreases, so that the belt is subjected to constant tension to test the elongation. During the constant tension process, the driving wheel 200 is not locked. During the test, the torque is loaded through the driven wheel 300, and the transmission belt will gradually elongate to test the elongation. The elongation formula is: elongation = (elongation length of the transmission belt-original length of the transmission belt) ÷ original length of the transmission belt × 100%); the service life of the transmission belt is calculated based on the test data and simulation software to achieve rapid testing and shorten the test cycle; the test can be paused at any time during the experiment. The test pause is a "pause" button on the test screen. The purpose of the test pause is to observe the condition of the transmission belt through the pause to check whether the transmission belt has cracks or cracks. These conditions cannot be seen during the operation of the equipment. It is necessary to stop the machine to observe the state of the transmission belt and understand the aging, elongation and damage of the transmission belt at different usage times. This machine has broken belt detection, center distance change rate, and slip rate detection. The specific operation process of realizing these three detections is as follows:

[0038] Belt break detection: If the speed of the driving wheel at 200 remains unchanged and the speed of the driven wheel at 300 suddenly changes to half of the previous speed, it is judged as a belt break and the machine will stop immediately;

[0039] Center distance change rate: The position of the driven wheel 300 is fixed, a slide is installed under the driving wheel 200, and the weight is loaded on the driving wheel 200. The real-time center distance can be detected by the magnetic probe. After the test starts, a 5-minute pre-rotation is performed, and the machine automatically stops after the pre-rotation. At the same time, the initial center distance is measured. During the test, the center distance is detected in real time, and the comparison with the initial center distance is the center distance change rate. The formula is δ = (ae-a0) / a0*100%, ae is the real-time center distance, and a0 is the initial center distance;

[0040] Slip ratio detection: The real-time rotation speed of the driving wheel 200 and the driven wheel 300 can be read by the speed sensor, and the slip ratio can be calculated according to the slip ratio formula;

[0041] Slip rate detection

[0042] The transmission device reaches the specified speed, and the test load is applied to the driven wheel 300. When the driving and driven wheels 300 reach the set speed, the load motor 101 of the driven wheel 300 performs reverse braking through the DC driver, loads the corresponding torque, and measures the slippage of the belt between the driving wheel 200 and the driven wheel 300. The test machine is allowed to operate continuously under this condition until the belt fails or the slip rate increment reaches 4%;

[0043] The sliding increment (g) is expressed as a percentage and can be calculated using the following formula:

[0044] g = (i0-it)x100;

[0045] i0 = initial speed of driven wheel 300 / initial speed of driving wheel 200;

[0046] it=the speed of the driven wheel 300 at the end of the test / the speed of the driving wheel 200 at the end of the test;

[0047] Belt break detection

[0048] The test machine uses a high-precision magnetic scale to detect the change in the center distance between the master and slave wheels 300. The slave wheel 300 is fixed first, and a magnetic probe is installed on the driving wheel 200. The magnetic probe moves on the magnetic scale to read the current center distance, and the high-speed gear sensor detects the speed of the master and slave wheels 300. When the center distance change exceeds the limit value instantly, or the speed of the driven wheel 300 is lower than the limit value, it is judged that the belt has broken.

[0049] A transmission shaft penetrates the interior of the driving wheel 200 and the driven wheel 300, and both ends of the transmission shaft extend to the exterior of the driving wheel 200 and the driven wheel 300. An eccentric mass part 301 is fixed to the end of the transmission shaft at one end of the driven wheel 300. A test sample, i.e., a sample to be tested, is sleeved on the eccentric mass part 301 and one end of the transmission shaft in the driving wheel 200, wherein the diameter of the eccentric mass part 301 is larger than the diameter of the end of the transmission shaft in the driving wheel 200.

[0050] The speed change, load mutation and dynamic balance unevenness change during the test process are used to detect the fatigue performance of the transmission belt, which truly reflects the life of the transmission belt in the application. The speed change means that the speeds of the driving wheel 200 and the driven wheel 300 are not always the same under the drive of the main transmission high-speed spindle motor 102 and the load motor 101 during the test. After the tension and torque are loaded, the speed of the driven wheel 300 will be reduced accordingly, that is, the test of detecting the slip rate; the load mutation means that the highest point and the lowest point of the eccentric mass part 301 have an effect on the belt tension, that is, the tension is different; the dynamic balance unevenness means that the eccentric mass part 301 is installed on the driven wheel 300, so that the force acting on the driven wheel 300 during the test is unbalanced, so that the force loaded on the transmission belt is unbalanced and uneven, that is, the force of the eccentric mass part 301 on the transmission belt at the highest point and the lowest point is different;

[0051] The eccentric mass part 301 simulates the sudden change of load to reflect the fatigue life and fatigue performance of the belt, that is, the highest point and the lowest point have an impact on the belt tension; the vibration sensor 302 monitors the machine failure caused by factors such as bearing wear caused by the eccentric weight during the entire experiment. The integrated vibration transmitter can detect the failure in advance and issue an alarm to prevent the machine from continuing to work under adverse conditions and causing losses.

[0052] In this embodiment, the transmission assembly 500 includes a linear slide rail symmetrically installed on the top surface of the frame 100, which is not marked in the figure, and a roller screw arranged in the linear slide rail. Both ends of the roller screw are provided with bearing seats installed on the end surface of the frame 100, which are not marked in the figure. The roller screw is connected to the bottom internal thread of the driving wheel 200, and the linear slide rail is slidingly connected to the bottom end surface of the driving wheel 200. In use, the driving wheel 200 is driven to move along the linear slide rail by the rotation of the roller screw, thereby achieving the purpose of horizontal movement left and right on the top surface of the frame 100.

[0053] In this embodiment, a locking assembly is also installed at the end of the roller screw, which includes a mounting plate 203 mounted on the side of the rack 100, and a locking cylinder 201 mounted on the mounting plate 203. A locking belt 204 sleeved on the end of the roller screw is fixed at the output end of the locking cylinder 201. A limit clamp column 202 is also installed on the mounting plate 203. The locking belt 204 bypasses the roller screw and is fixed in the limit clamp column 202. When the roller screw needs to stop moving, the locking cylinder 201 is started, and then the locking cylinder 20 1 drives the locking belt 204 to lock, at which time the locking belt 204 is pressed against the roller screw, and the roller screw is stopped from moving by increasing the damping force. The sliding rod in the placement frame is provided with a motor, and a synchronous wheel is also installed at the end of the roller screw. A synchronous belt is sleeved between the synchronous wheel at this position and the output end of the motor, so as to drive the roller screw to rotate and drive the driving wheel 200 to move left and right; the weight loading structure 103 is connected to the motor, and the height of the motor can be adjusted through the weight loading structure 103, so as to achieve the tension of the synchronous belt at this position.

[0054] In this embodiment, a vibration sensor 302 is also installed on the side of the driven wheel 300 away from the driving wheel 200, and a pulley is also installed on the other end of the transmission shaft in the driven wheel 300. The pulley is connected to the load motor 101 through a belt, and a torque sensor 303 is also arranged at the end of the transmission shaft.

[0055] In this embodiment, a pulley is installed at the other end of the transmission shaft in the driving wheel 200, and the pulley is connected to the main transmission high-speed spindle motor 102 through a belt.

[0056] In this embodiment, a speed sensor 400 is installed on both the driving wheel 200 and the driven wheel 300 . The detection end of the speed sensor 400 is located at the pulley position of the driving wheel 200 and the driven wheel 300 , so as to detect the rotation speed.

[0057] In this embodiment, a damping shock absorber is also installed at the bottom end surface of the frame 100 to reduce the resonance amplitude of the mechanical structure, thereby preventing the structure from reaching the limit due to stress and causing structural damage.

[0058] The equipment measures the transmission power, transmission power attenuation and attenuation curve of elastic multi-V belts and elastic automotive V belts, belt temperature changes caused by speed changes, power changes, load sudden change and weight block inertia changes caused by belt elongation changes (center distance changes), center distance changes and change curves, reflecting whether the elastic variables of the elastic belt meet the inertia changes during load sudden change and weight imbalance when the load and inertia change, so as to make stability judgment during the operation of the equipment and simulate the belt's operation wear, bending fatigue resistance and service life. During the test, the initial values ​​of various parameters such as the center distance change, belt slip rate change, belt exposed height change and maximum transmission power resume under different loads, different speeds, different load sudden changes and different weight inertia are used as initial data during a certain running time, and the initial fatigue life of the belt is simulated and calculated through the belt transmission power calculation formula and simulation software.

[0059] By changing the test speed, test load power (changing the test loading torque), test load mutation, and application of unbalanced blocks (increasing unbalanced force), the change in the center distance of the test belt and the change curve, the belt temperature rise curve, the belt wear resistance and change curve, the belt slip rate and the slip rate change curve are tested at each running time during the test; when the center distance is fixed, the attenuation and attenuation curve of the belt transmission power; when the driving wheel is at a fixed speed, the speed change curve of the driven wheel; various data calculations are performed, and the test data is substituted into the simulation software to perform a comprehensive calculation and judgment on the fatigue life of the belt, and the service life of the elastic belt is obtained; through the rapid fatigue simulation test of the elastic belt, the test time can be shortened from 120 days to 7 days; the test efficiency is improved, energy consumption is reduced, and the test cost is saved; and test data is provided for improving product quality for product quality upgrade.

[0060] Although the embodiments of the present invention have been shown and described (see the above detailed description for details), it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Transmission belt torque rapid fatigue simulation testing machine, characterized by: include A frame (100) is provided with a load motor (101) at one end thereof, and a main transmission high-speed spindle motor (102) is provided on one side of the load motor (101); a placement rack is also provided on the top of the other end of the frame (100), and a weight loading structure (103) is also provided on the placement rack; A driving wheel (200) is slidably arranged on the top surface of the frame (100), a transmission assembly (500) is also arranged between the frame (100) and the driving wheel (200), the main transmission high-speed spindle motor (102) is drivingly connected to the driving wheel (200), and A driven wheel (300) is mounted at one end of the top of the frame (100), and the load motor (101) is connected to the driven wheel (300) via a belt; A transmission shaft penetrates the interior of the driving wheel (200) and the driven wheel (300), and both ends of the transmission shaft extend to the exterior of the driving wheel (200) and the driven wheel (300). An eccentric mass member (301) is fixed to the end of the transmission shaft at one end of the driven wheel (300), and a sample is sleeved on the eccentric mass member (301) and one end of the transmission shaft in the driving wheel (200).

2. The transmission belt torque rapid fatigue simulation testing machine according to claim 1 is characterized in that: The transmission assembly (500) comprises a linear slide rail symmetrically mounted on the top surface of a frame (100), and a roller screw arranged in the linear slide rail, both ends of the roller screw being sleeved with bearing seats mounted on the end surface of the frame (100), the roller screw being connected to the inner thread of the bottom end of the driving wheel (200), and the linear slide rail being slidably connected to the bottom end surface of the driving wheel (200).

3. The transmission belt torque rapid fatigue simulation testing machine according to claim 2 is characterized in that: The end of the roller screw is also mounted with a locking assembly, the locking assembly comprising a mounting plate (203) mounted on the side of the rack (100) and a locking cylinder (201) mounted on the mounting plate (203); a locking belt (204) sleeved on the end of the roller screw is fixed to the output end of the locking cylinder (201); a limit clamping column (202) is also mounted on the mounting plate (203); the locking belt (204) passes around the roller screw and is clamped and fixed in the limit clamping column (202); a motor is arranged on the sliding rod in the rack; a synchronous wheel is also mounted on the end of the roller screw; a synchronous belt is sleeved between the synchronous wheel at this position and the output end of the motor; the weight loading structure (103) is connected to the motor; the height of the motor can be adjusted by the weight loading structure (103), thereby achieving the tension of the synchronous belt at this position.

4. The transmission belt torque rapid fatigue simulation testing machine according to claim 1, characterized in that: A vibration sensor (302) is also installed on the side of the driven wheel (300) facing away from the driving wheel (200), a pulley is also installed on the other end of the transmission shaft in the driven wheel (300), the pulley is connected to the load motor (101) via a belt, and a torque sensor (303) is also arranged at the end of the transmission shaft.

5. The transmission belt torque rapid fatigue simulation testing machine according to claim 4 is characterized in that: A pulley is installed at the other end of the transmission shaft in the driving wheel (200), and the pulley is connected to the main transmission high-speed main shaft motor (102) via a belt.

6. The transmission belt torque rapid fatigue simulation testing machine according to claim 5, characterized in that: The driving wheel (200) and the driven wheel (300) are both equipped with a speed sensor (400), and the detection end of the speed sensor (400) is located at the pulley position of the driving wheel (200) and the driven wheel (300).

7. The transmission belt torque rapid fatigue simulation testing machine according to claim 1 is characterized in that: A damping shock absorber is also installed at the bottom end surface of the frame (100).

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