Positioner Vibration Fatigue Testing Machine

Abstract

The invention relates to the technical field of accessory devices of an electrified railway contact network system, and in particular to a positioner vibration fatigue testing machine; the machine can simulate a test of applying a frequency of 1 to 3 Hz and an amplitude of 35 to 120 mm to a positioner under a rated working tension of ±30% specified in railway industry standards; the machine comprises a test frame, a copper contact wire, a contact wire terminal anchoring wire clamp, a stainless steel compensation rope, a pulley, a double-ear wedge-shaped wire clamp, a sinker rod, a sinker, a linear reciprocating test mechanism and a positioner, wherein the pulley is fixedly arranged at the top of the left and right ends of the test frame, the stainless steel compensation rope sleeve is arranged on the pulley, the stainless steel compensation rope is connected to the sinker rod through the double-ear wedge-shaped wire clamp, a tray is arranged at the bottom end of the sinker rod, the sinker is placed on the tray, the linear reciprocating test mechanism is arranged in the middle of the test frame, a load sensor base is fixedly arranged on the test frame, and a load sensor is arranged on the load sensor base.

Description

Technical Field

[0001] The invention relates to the technical field of accessory devices of an electrified railway contact network system, and in particular to a positioner vibration fatigue testing machine. Background Art

[0002] As we all know, the positioner is a key component for fixing the contact wire position in the electrified railway contact network system to ensure the stable current collection of the pantograph. The railway industry standard stipulates that the positioner should meet the vibration resistance requirements of 1-3Hz and amplitude of 35-120mm under the actual working tension of the wire, and the fatigue resistance requirements of no cracking, deformation, etc. under the alternating load of 500,000 times and ±30% of the rated working load. The working tension in the vibration resistance test is formed by the wire tension. Due to the differences in the test line length and the wire pull-out value, the actual tension borne by the positioner is uncertain, and different test results cannot be equivalently compared. The fatigue test is only a pure tensile or compressive working load test in the specified direction, which cannot reflect the impact of vibration, and these two test results cannot prove the product simulation performance in a superimposed manner, which has certain defects. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a positioner vibration fatigue testing machine which can simulate the test of applying a frequency of 1 to 3 Hz and an amplitude of 35 to 120 mm to the positioner under ±30% rated working tension specified in the railway industry standard.

[0004] The positioner vibration fatigue testing machine of the present invention comprises a test frame, a copper contact wire, a contact wire terminal anchor wire clamp, a stainless steel compensation rope, a pulley, a double-ear wedge-shaped wire clamp, a sinker rod, a sinker, a linear reciprocating test mechanism and a positioner, wherein the pulley is fixedly arranged at the top of the left and right ends of the test frame, the copper contact wire and the stainless steel compensation rope are connected by the contact wire terminal anchor wire clamp, the stainless steel compensation rope is sleeved on the pulley, the stainless steel compensation rope is connected to the sinker rod by the double-ear wedge-shaped wire clamp, a tray is arranged at the bottom end of the sinker rod, the sinker is placed on the tray, the linear reciprocating test mechanism is arranged in the middle of the test frame, a load sensor base is fixedly arranged on the test frame, a load sensor is arranged on the load sensor base, one end of the positioner is hinged to the load sensor, and one end of the positioner is connected to the middle of the copper contact wire;

[0005] The linear reciprocating test mechanism includes a test body, a turbine reducer, and an electromagnetic speed regulating motor. A fixed base is provided on the test frame. The turbine reducer and the electromagnetic speed regulating motor are both fixedly provided on the fixed base. The output end of the electromagnetic speed regulating motor is connected to the input end of the turbine reducer.

[0006] The test body includes a guide cylinder, a linear bearing, a linear guide rod, a connecting rod, a dovetail slider and a dovetail slide groove. The dovetail slide groove is transmission-connected to the output end of the turbine reducer, the dovetail slider fits with the dovetail slide groove, one end of the connecting rod is hinged to the dovetail slider, and the other end of the connecting rod is hinged to the bottom end of the linear guide rod. A linear bearing is arranged on the linear guide rod, the guide cylinder is fixedly arranged on the test frame, the top end of the linear guide rod is inserted from the bottom end of the guide cylinder and passes through the top end of the guide cylinder, the linear bearing is arranged in the guide cylinder, and a support plate is arranged at the top end of the linear guide rod, and the support plate is in close contact with the rear part of the bottom end of the locator.

[0007] The positioner vibration fatigue testing machine of the present invention has an adjusting bolt on the dovetail slot, the adjusting bolt is threadedly connected to the dovetail slot, the adjusting bolt is in close contact with the dovetail slider, and the dovetail slider can slide along the dovetail slot.

[0008] In the positioner vibration fatigue testing machine of the present invention, a displacement sensor is arranged on the guide cylinder.

[0009] The positioner vibration fatigue testing machine of the present invention further comprises an electrical control box, which is electrically connected to the electromagnetic speed regulating motor, the load sensor and the displacement sensor respectively.

[0010] The positioner vibration fatigue testing machine of the present invention has the test frames formed by welding square tubes.

[0011] The positioner vibration fatigue testing machine of the present invention has a supporting foot at the bottom end of the testing frame.

[0012] In the positioner vibration fatigue testing machine of the present invention, the electrical control box is separately arranged from the test frame.

[0013] Compared with the prior art, the invention has the following beneficial effects: one end of the positioner of the test piece is connected to the load sensor fixed on the test frame, and the other end is connected to the copper contact wire. The two ends of the copper contact wire are connected to the stainless steel compensation rope through the contact wire terminal anchoring wire clamp. After the pulley is reversed, the counterweight system composed of the double-ear wedge-shaped wire clamp, the weight rod and the weight forms horizontal tension on the positioner. During the test, by adjusting the weight of the weight, the positioner is subjected to ±30% of the rated working tension. The vibration of the positioner is controlled by a linear reciprocating test mechanism composed of a test machine body, a turbine reducer and an electromagnetic speed regulating motor to achieve a frequency of 1 to 3 Hz and an amplitude of 35 to 120 mm. By starting the electromagnetic speed regulating motor, the electromagnetic speed regulating motor drives the turbine reducer to rotate, the turbine reducer drives the dovetail slide to rotate, and drives the dovetail slider to move in the dovetail slide to form an eccentricity (amplitude). The connecting rod pushes the linear guide rod to make a linear reciprocating motion in the linear bearing to achieve sinusoidal waveform vibration. It can more realistically simulate the ±30% rated working tension specified in the railway industry standard, and apply a frequency of 1 to 3 Hz and an amplitude of 35 to 120 mm to the positioner for a test, which solves the uncertainty of the existing positioner test tension. At the same time, it effectively combines the vibration test and the fatigue test, and the test result is closer to the actual stress condition of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0015] Figure 2 It is a three-dimensional structural schematic diagram of the power mechanism of the test machine body of the present invention;

[0016] Figure 3 It is a right view structural schematic diagram of the present invention;

[0017] Figure 4 It is a front structural schematic diagram of the present invention;

[0018] Figure 5 It is a schematic diagram of the connection structure between the dovetail slider and the dovetail chute of the present invention;

[0019] Figure 6 It is a schematic diagram of the connection of the PLC control circuit of the present invention;

[0020] Figure 7 It is a schematic diagram of the connection of the electromagnetic speed regulating motor and the turbine reducer circuit of the present invention;

[0021] Markings in the attached drawings: 1. Test frame; 2. Copper contact wire; 3. Contact wire terminal anchor clamp; 4. Stainless steel compensation rope; 5. Pulley; 6. Double-ear wedge clamp; 7. Plumb weight; 8. Plumb weight; 9. Electrical control box; 10. Load sensor base; 11. Load sensor; 12. Positioner; 13. Test machine body; 14. Displacement sensor; 15. Turbine reducer; 16. Electromagnetic speed control motor; 17. Linear bearing; 18. Connecting rod; 19. Dovetail slider; 20. Dovetail slide; 21. Adjusting bolt; 22. Support foot; 23. Linear guide rod; 24. Guide cylinder; 25. Support plate. DETAILED DESCRIPTION

[0022] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0023] like Figures 1 to 7 As shown, the positioner vibration fatigue testing machine of the present invention comprises a test frame 1, a copper contact wire 2, a contact terminal anchoring wire clamp 3, a stainless steel compensation rope 4, a pulley 5, a double-ear wedge-shaped wire clamp 6, a sinker rod 7, a sinker 8, a linear reciprocating test mechanism and a positioner 12, the pulley 5 is fixedly arranged at the top of the left and right ends of the test frame 1, the copper contact wire 2 and the stainless steel compensation rope 4 are connected through the contact terminal anchoring wire clamp 3, the stainless steel compensation rope 4 is arranged on the pulley 5, the stainless steel compensation rope 4 is connected to the sinker rod 7 through the double-ear wedge-shaped wire clamp 6, a tray is arranged at the bottom end of the sinker rod 7, the sinker 8 is placed on the tray, the linear reciprocating test mechanism is arranged in the middle of the test frame 1, a load sensor base 10 is fixedly arranged on the test frame 1, a load sensor 11 is arranged on the load sensor base 10, one end of the positioner 12 is hinged to the load sensor 11, and one end of the positioner 12 is connected to the middle of the copper contact wire 2;

[0024] The linear reciprocating test mechanism includes a test body 13, a turbine reducer 15, and an electromagnetic speed regulating motor 16. A fixed base is provided on the test frame 1. The turbine reducer 15 and the electromagnetic speed regulating motor 16 are both fixedly provided on the fixed base. The output end of the electromagnetic speed regulating motor 16 is connected to the input end of the turbine reducer 15.

[0025] The test body 13 includes a guide cylinder 24, a linear bearing 17, a linear guide rod 23, a connecting rod 18, a dovetail slider 19 and a dovetail slide 20. The dovetail slide 20 is connected to the output end of the turbine reducer 15, the dovetail slider 19 is matched with the dovetail slide 20, one end of the connecting rod 18 is hinged to the dovetail slider 19, and the other end of the connecting rod 18 is hinged to the bottom end of the linear guide rod 23. The linear bearing 17 is provided on the linear guide rod 23, and the guide cylinder 24 is fixedly provided on the test frame 1. The top of the linear guide rod 23 is inserted from the bottom of the guide cylinder 24 and passes through the top of the guide cylinder 24. The linear bearing 17 is arranged in the guide cylinder 24. The top of the linear guide rod 23 is provided with a support plate 25, and the support plate 25 is in close contact with the rear part of the bottom end of the positioner 12; one end of the positioner of the test piece is connected to the load sensor fixed on the test frame, and the other end is connected to the copper contact wire. The two ends of the copper contact wire are connected to the stainless steel compensation rope through the contact wire terminal anchor wire clamp. After the pulley is reversed, the double-ear wedge wire is connected to the load sensor fixed on the test frame. The counterweight system composed of the clamp, the weight rod and the weight forms horizontal tension on the positioner. During the test, by adjusting the weight of the weight, the positioner is subjected to ±30% of the rated working tension. The vibration of the positioner is controlled by the linear reciprocating test mechanism composed of the test body, the turbine reducer and the electromagnetic speed regulating motor to achieve a frequency of 1-3Hz and an amplitude of 35-120mm. By starting the electromagnetic speed regulating motor, the electromagnetic speed regulating motor drives the turbine reducer to rotate, and the turbine reducer drives the dovetail slide to rotate, and drives the dovetail slider to move in the dovetail slide to form an eccentricity (amplitude). The linear guide rod is pushed to make a linear reciprocating motion in the linear bearing through the connecting rod to achieve sinusoidal waveform vibration. It can more realistically simulate the ±30% rated working tension specified in the railway industry standard, and apply a frequency of 1-3Hz and an amplitude of 35-120mm to the positioner for a test, which solves the uncertainty of the existing positioner test tension and effectively combines the vibration test and fatigue test. The test result is closer to the actual stress condition of the product.

[0026] The positioner vibration fatigue testing machine of the present invention has an adjusting bolt 21 on the dovetail slot 20, the adjusting bolt 21 is threadedly connected to the dovetail slot 20, the adjusting bolt 21 is in close contact with the dovetail slider 19, and the dovetail slider 19 can slide along the dovetail slot 20; the dovetail slider sliding in the dovetail slot can be limited by tightening the adjusting bolt, so that the moving distance of the dovetail slider in the dovetail slot changes, and the formed eccentricity (amplitude) changes, and the amplitude of the positioner changes through the transmission of the connecting rod and the linear guide rod, which can simulate multi-sinusoidal waveform vibration.

[0027] In the positioner vibration fatigue testing machine of the present invention, a displacement sensor 14 is arranged on the guide cylinder 24; the amplitude required for the test can be obtained by setting the displacement sensor.

[0028] The positioner vibration fatigue testing machine of the present invention also includes an electrical control box 9, which is electrically connected to the electromagnetic speed regulating motor 16, the load sensor 11 and the displacement sensor 14 respectively; the electrical control box obtains the test frequency control by adjusting the speed of the electromagnetic speed regulating motor, and obtains the "load-displacement" and "load-time" test curves through the load sensor and the displacement sensor and the PCL control circuit.

[0029] In the positioner vibration fatigue testing machine of the present invention, the test frame 1 is formed by welding of square tubes; the square tube welding makes the test frame structure more stable.

[0030] In the positioner vibration fatigue testing machine of the present invention, a support foot 22 is provided at the bottom end of the test frame 1; the setting of the support foot can increase the contact area between the device and the contact surface, thereby making the device as a whole more stable and reducing the vibration of the device during operation.

[0031] The positioner vibration fatigue testing machine of the present invention connects one end of the positioner of the test piece to the load sensor fixed on the test frame, and the other end to the copper contact wire. The two ends of the copper contact wire are connected to the stainless steel compensation rope through the contact wire terminal anchor wire clamp. After the pulley is reversed, the counterweight system composed of the double-ear wedge-shaped wire clamp, the weight rod and the weight forms a horizontal tension on the positioner. During the test, the weight of the weight is adjusted to make the positioner bear ±30% of the rated working tension. The vibration of the positioner is controlled by the test machine body, the turbine reducer and the vibration of the positioner. The linear reciprocating test mechanism composed of a speed reducer and an electromagnetic speed regulating motor can achieve frequency 1~3Hz and amplitude 35~120mm control. By starting the electromagnetic speed regulating motor, the electromagnetic speed regulating motor drives the turbine reducer to rotate, and the turbine reducer drives the dovetail slide to rotate, driving the dovetail slide to move in the dovetail slide to form an eccentricity (amplitude). The connecting rod drives the linear guide rod to make a linear reciprocating motion in the linear bearing to achieve sinusoidal waveform vibration, which can more realistically simulate the ±30% rated working pressure specified in the railway industry standard. Under tension, the positioner is subjected to a test with a frequency of 1 to 3 Hz and an amplitude of 35 to 120 mm, which solves the uncertainty of the existing positioner test tension and effectively combines the vibration test with the fatigue test, so that the test result is closer to the actual stress condition of the product; the dovetail slider sliding in the dovetail chute can be limited by tightening the adjusting bolt, so that the moving distance of the dovetail slider in the dovetail chute changes, and the formed eccentricity (amplitude) changes. The amplitude of the positioner changes through the transmission of the connecting rod and the linear guide rod, and the amplitude required for the test can be obtained by simulating a sinusoidal waveform through the displacement sensor; the electrical control box obtains the test frequency control by adjusting the speed of the electromagnetic speed regulating motor, and obtains the "load-displacement" and "load-time" test curves through the load sensor and the displacement sensor by the PCL control circuit; the square tube welding makes the test frame structure more stable; the contact area between the device and the contact surface can be increased by setting the support foot, so that the device as a whole is more stable and the vibration of the device during operation can be reduced.

[0032] The positioner vibration fatigue testing machine of the present invention, the electromagnetic speed regulating motor, the load sensor, the displacement sensor and the electrical control box are all purchased, and the load sensor, the displacement sensor and the electrical control box are all electrically connected through the instruction manual purchased together.

[0033] The positioner vibration fatigue testing machine of the present invention, the installation method, connection method or setting method of all the above-mentioned components are common mechanical methods, and the specific structures, models and coefficient indicators of all its components are its own technology. As long as it can achieve its beneficial effects, it can be implemented, so it will not be elaborated.

[0034] For the positioner vibration fatigue testing machine of the present invention, unless otherwise stated, the directional words contained in the terms such as "up, down, left, right, front, back, inside, outside, vertical, horizontal" only represent the orientation of the term in normal use, or are common names understood by those skilled in the art, and should not be regarded as restrictions on the term. At the same time, the number series nouns such as "first", "second" and "third" do not represent specific quantities and orders, but are only used to distinguish names. The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A positioner vibration fatigue testing machine, characterized in that: The invention comprises a test frame (1), a copper contact wire (2), a contact terminal anchor wire clamp (3), a stainless steel compensation rope (4), a pulley (5), a double-ear wedge-shaped wire clamp (6), a weight rod (7), a weight (8), a linear reciprocating test mechanism and a positioner (12), wherein the pulley (5) is fixedly arranged at the top of the left end and the right end of the test frame (1), the copper contact wire (2) and the stainless steel compensation rope (4) are connected via the contact terminal anchor wire clamp (3), the stainless steel compensation rope (4) is arranged on the pulley (5), and the stainless steel compensation rope ( 4) is connected to a weight rod (7) via a double-ear wedge-shaped wire clamp (6); a tray is provided at the bottom end of the weight rod (7), and the weight (8) is placed on the tray; the linear reciprocating test mechanism is arranged in the middle of the test frame (1); a load sensor base (10) is fixedly provided on the test frame (1); a load sensor (11) is provided on the load sensor base (10); one end of the positioner (12) is hinged to the load sensor (11), and one end of the positioner (12) is connected to the middle of the copper contact wire (2); The linear reciprocating test mechanism comprises a test body (13), a turbine reducer (15), and an electromagnetic speed regulating motor (16); a fixed base is provided on the test frame (1); the turbine reducer (15) and the electromagnetic speed regulating motor (16) are both fixedly provided on the fixed base; and an output end of the electromagnetic speed regulating motor (16) is connected to an input end of the turbine reducer (15); The test machine body (13) comprises a guide cylinder (24), a linear bearing (17), a linear guide rod (23), a connecting rod (18), a dovetail slider (19) and a dovetail slide groove (20), wherein the dovetail slide groove (20) is transmission-connected to the output end of the turbine reducer (15), the dovetail slider (19) is matched with the dovetail slide groove (20), one end of the connecting rod (18) is hinged to the dovetail slider (19), and the other end of the connecting rod (18) is hinged to the linear guide rod (23). ), the linear guide rod (23) is provided with a linear bearing (17), the guide cylinder (24) is fixedly arranged on the test frame (1), the top end of the linear guide rod (23) is inserted from the bottom end of the guide cylinder (24) and passes through the top end of the guide cylinder (24), the linear bearing (17) is arranged in the guide cylinder (24), the top end of the linear guide rod (23) is provided with a support plate (25), and the support plate (25) is in close contact with the rear part of the bottom end of the locator (12).

2. The positioner vibration fatigue testing machine according to claim 1, characterized in that: The dovetail shaped slide groove (20) is provided with an adjusting bolt (21), the adjusting bolt (21) is threadedly connected to the dovetail shaped slide groove (20), the adjusting bolt (21) is in close contact with the dovetail shaped slider (19), and the dovetail shaped slider (19) can slide along the dovetail shaped slide groove (20).

3. The positioner vibration fatigue testing machine according to claim 2, characterized in that: A displacement sensor (14) is provided on the guide cylinder (24).

4. The positioner vibration fatigue testing machine according to claim 3, characterized in that: It also includes an electrical control box (9), wherein the electrical control box (9) is electrically connected to the electromagnetic speed regulating motor (16), the load sensor (11), and the displacement sensor (14).

5. The positioner vibration fatigue testing machine according to claim 4, characterized in that: The test frames (1) are all formed by welding square tubes.

6. The positioner vibration fatigue testing machine according to claim 5, characterized in that: A supporting foot (22) is provided at the bottom end of the test frame (1).

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