CN106840935B - Rope hypervelocity friction test machine - Google Patents

Abstract

The invention discloses a rope ultra-high-speed friction and wear testing machine, which includes a fixing device, a power device, a friction test device, and a test control device; the fixing device includes a workbench, a column, a lower fixing plate, an upper fixing plate, and a supporting bearing; The power unit includes a motor, a gearbox, a clutch, and a rocket engine; the friction test device includes a rotating shaft, a driven gear, a friction wheel, a tensioning wheel, and a connecting rod mechanism; a column is fixed on the workbench, and a Fixed plate; the fixed plate is provided with a support bearing; the rotating shaft is installed on the fixed plate through the supporting bearing; the driven gear is installed in the middle of the rotating shaft, and the friction wheel is installed at the top; the tensioning wheel is fixed on the column through the linkage mechanism; the motor It is connected with the driven gear through the gearbox and the clutch; the rocket motor is fixed on a circle of the rotating shaft; the test device is connected with the rotating shaft, the tensioning wheel, and the rocket motor; it can simultaneously simulate the friction and wear of the slip ring on the rope at medium and low speeds and high speeds the process of.

Description

A kind of ultra-high-speed friction test machine for rope

technical field

The invention belongs to friction and wear testing equipment, in particular to a rope ultra-high-speed friction testing machine.

Background technique

The friction and wear test bench is an experimental device for testing the friction and wear characteristics of the matching pair. The rope ultra-high-speed friction test bench is mainly used to test the sliding friction and wear characteristics of ropes under different materials, loads and wrap angles. In practical applications, such as ship cables, elevator traction cables, etc., the use of ropes is accompanied by wear and tear with other parts. As the degree of wear increases, the safety and stability of the ropes will be affected to a certain extent. Influence, and then affect the use of the corresponding equipment, resulting in unnecessary losses, which requires testing and analysis of the friction and wear properties of the rope. Therefore, a rope sliding contact friction and wear testing machine was invented to test the sliding friction and wear characteristics between ropes using different materials, under different rope tension loads, different contact wrap angles, and different sliding speeds. , it is helpful to rationally design the rope and cableway, and determine the load and speed range of the rope. These experimental research contents are of great significance to the design and maintenance of the cableway.

The utility model patent with Chinese Patent Publication No. 201521040959.4 discloses a steel wire rope friction and wear testing machine. The friction and wear measurement of the steel wire rope is mainly realized by the reciprocating motion of the longitudinal hydraulic device on the support platform. Its defect is that limited by the hydraulic transmission device, it can only simulate the friction of medium and low speeds (10m/s～70m/s linear velocity), and the stroke is limited by the supporting platform, so the test time is long, and it cannot accurately simulate the rope at ultra-high speed ( ≥100m/s linear velocity) under the impact of wear, so the ultra-high-speed friction and wear performance of the rope can not be well measured.

Contents of the invention

The technical problem solved by the present invention is to provide an ultra-high-speed friction testing machine for ropes, which can be used to simulate the process of friction and wear of the slip ring on the rope at medium and low speeds, and can also be used to simulate the ultra-high-speed friction of the slip ring to the rope The wear process solves the problem that the existing friction testing machine cannot accurately simulate the wear condition of the rope under the impact of ultra-high speed.

The technical solution that realizes the object of the present invention is:

A rope ultra-high-speed friction and wear testing machine, including a fixing device, a power device, a friction test device, and a test control device; the fixing device includes a workbench, a column, a lower fixing plate, an upper fixing plate, and a support bearing; the power device Including a motor, a gearbox, a clutch, and a rocket engine; the friction test device includes a rotating shaft, a driven gear, a friction wheel, a tension wheel, and a connecting rod mechanism;

Four uprights are fixed on the workbench, and the four uprights are distributed on the workbench in a rectangle; the upper and lower ends of the uprights are respectively equipped with an upper fixed plate and a lower fixed plate; the planes of the upper fixed plate and the lower fixed plate are uniform perpendicular to the axis of the column; the centers of the upper and lower fixing plates are provided with support bearings, the centers of the two support bearings are coaxial and parallel to the axis of the column; the rotating shaft is installed through two support bearings On the upper fixed plate and the lower fixed plate; a driven gear is installed in the middle of the rotating shaft, and a friction wheel is installed on the top of the rotating shaft; the tensioning wheel is located between two columns at one end, and the tensioning wheel passes through the connecting The rod mechanism is fixed on one of the columns, one end of the rope is fixed on one of the two columns at the other end, and the other end of the rope is fixed on the tensioning wheel; the motor is connected with the driven gear through the gearbox and the clutch , the rotation of the rotating shaft is driven by the driven gear; the rocket motor is fixed on one circle of the rotating shaft; the test device is connected with the rotating shaft, the tension wheel and the rocket motor.

Compared with the prior art, the present invention has significant advantages:

(1) The rope ultra-high-speed friction tester of the present invention has high rotational speed, fast linear friction speed, short rotational speed loading time, stable loading, large rotational acceleration overload, and high precision, and is especially suitable for friction and wear performance under ultra-high-speed impact of ropes test analysis;

(2) When the rocket engine is not working, the motor can be used for medium and low speed friction and wear fatigue tests, which has good versatility;

(3) The rope super-high-speed friction testing machine of the present invention adopts the rocket engine point as a power source, and compared with the disc type friction and wear testing machine driven by the general independent hydraulic pressure and motor, the rotating speed is faster, the loading time is shorter, and can Complete tests faster.

(4) The relative position of the tensioning wheel and the friction wheel can be changed by using the link mechanism, so as to realize the adjustment of the tension load and the contact angle of the rope and the friction wheel.

The present invention will be described in further detail below in conjunction with the accompanying drawings.

Description of drawings

Fig. 1 is the overall structural representation of the present invention;

Fig. 2 is the schematic top view of the structure of the friction test device;

Figure 3 is a schematic diagram of the installation structure of the rocket motor.

Detailed ways

1-3, a kind of rope ultra-high-speed friction and wear testing machine of the present invention includes a fixing device, a power device, a friction test device, and a test control device; the fixing device includes a workbench 11, a column 1, and a lower fixing plate 2 , upper fixed plate 4, support bearing 6; Described power unit comprises motor 3, gearbox, clutch (16), rocket engine 10; Described friction test device comprises rotating shaft 8, driven gear 15, friction wheel 5, Zhang Tight wheel 9, linkage mechanism 14;

Four columns are fixed on the workbench 11, and the four columns are rectangularly distributed on the workbench 11; the upper and lower ends of the column 1 are respectively equipped with an upper fixed plate 4 and a lower fixed plate 2; the upper fixed plate 4 and the lower fixed plate The plane of lower fixed plate 2 is all perpendicular to the axis of column 1; The axes are parallel; the rotating shaft 8 is installed on the upper fixing plate 4 and the lower fixing plate 2 through two support bearings 6; a driven gear 15 is installed in the middle of the rotating shaft 8, and a friction wheel 5 is installed on the top of the rotating shaft 8; The tension wheel 9 is located between two columns 1 at one end, and the tension wheel 9 is fixed on one of the columns 1 by a link mechanism 14; the relative relationship between the tension wheel 9 and the friction wheel 5 is adjusted by the link structure 14 The rope is in close contact with the friction wheel 5; the motor 3 is connected to the driven gear 15 through the gearbox and the clutch 16, and the driven gear 15 drives the rotation of the rotating shaft 8; the rocket engine 10 is fixed on the rotating shaft 8 a week.

The test control device includes a speed sensor 7, a tension sensor, a pressure sensor, a data processing device 12, and a recording and display device 13; the tension sensor is arranged on the tension wheel 9, and is used to test the tension variation of the sample to be tested; The pressure sensor is installed in the rocket motor 10 for testing the pressure change of the rocket motor 4; the speed sensor 7 is installed outside the circumference of the rotating shaft 8 for testing the rotating speed of the rotating shaft 8; the speed sensor 7, tension sensor, The pressure sensors are all connected to the data processing device 12, and the data processing device 12 is connected to the recording and display device 13; the data processing device 12 performs digital-to-analog conversion and processing on the data of the sensor test, and transmits the converted data to the recording and display device 13; The record and display device 13 displays and saves the measured data. Described record and display device 13 can be computer and digital voltmeter, and digital voltmeter records each sensor voltage, and digital voltmeter transmits data to computer and displays and saves; In some embodiments, record and display device is computer, directly to processed display and save the data.

Further, there are at least two rocket motors 10, which are equidistantly installed on the same cross-section of the circumference of the rotating shaft 8;

3, as a preferred embodiment, the number of rocket motors 10 is four, equidistantly installed on the same cross-section of the circumference of the rotating shaft 8; after testing, the acceleration of the rocket motor 10 makes the rotation of the rotating shaft 8 The rotational speed reaches 100,000 rpm, the linear friction speed can reach Mach 3, the rotational speed loading time is short (10-100ms), the loading is relatively stable, and the rotational acceleration overload is 50,000 rpm/s ² .

In some embodiments, the number of the rocket motors 10 is 8, which are installed on different cross-sections of the circumference of the rotating shaft 8 to increase the rotational speed of the rotating shaft 8 . Further, different numbers of rocket motors 10 can be installed according to different needs of rotating speeds.

When working, first fix one end of the rope to be tested on the column 1, and fix the other end on the tensioning wheel 9, adjust the tensioning wheel 9 so that the rope is in close contact with the friction wheel 5, and use the link mechanism 14 to change the tensioning wheel 9 The relative position with the friction wheel 5 realizes the adjustment of the tension load and the contact wrap angle between the rope and the friction wheel 5; when the motor 3 is turned on, the rotating shaft 8 starts to rotate, and the rotational power of the friction and wear test starts to be driven by the motor 3, when the rotating shaft 8 After the motor 3 rotates to the threshold, the motor 3 maintains the output power. At this time, the rocket engine 10 is ignited, and at the same time, the gearbox is separated from the driven gear 15 on the rotating shaft 8 through the clutch 16, and the rotation speed of the rotating shaft 8 is pushed by the rocket engine 10 to continue. increase for higher speed friction and wear tests. After the rocket engine 10 was ignited, the built-in pressure sensor of the rocket engine 10, the tension sensor and the speed sensor 7 on the tensioning wheel 9 started to work, and effectively recorded the pressure change of the rocket engine 10, the change of the tension of the rope to be measured and the change of the rotational speed of the rotating shaft 8 , and output to the recording and display device 13 after data processing and recording.

Claims (4)

1. The utility model provides a rope hypervelocity friction wear test machine which characterized in that: comprises a fixing device, a power device and a friction test device; the fixing device comprises a workbench (11), an upright post (1), a lower fixing plate (2), an upper fixing plate (4) and a support bearing (6); the power device comprises a motor (3), a gearbox, a clutch (16) and a rocket engine (10); the friction test device comprises a rotating shaft (8), a driven gear (15), a friction wheel (5), a tension wheel (9) and a connecting rod mechanism (14);

four upright posts are fixed on the workbench (11), and the four upright posts are distributed on the workbench (11) in a rectangular manner; the upper end and the lower end of the upright post (1) are respectively provided with an upper fixing plate (4) and a lower fixing plate (2); the planes of the upper fixing plate (4) and the lower fixing plate (2) are both vertical to the axis of the upright post (1); the centers of the upper fixing plate (4) and the lower fixing plate (2) are both provided with a supporting bearing (6), and the centers of the two supporting bearings (6) are coaxial and are both parallel to the axis of the upright post (1); the rotating shaft (8) is arranged on the upper fixing plate (4) and the lower fixing plate (2) through two supporting bearings (6); a driven gear (15) is mounted in the middle of the rotating shaft (8), and a friction wheel (5) is mounted at the top end of the rotating shaft (8); the tensioning wheel (9) is positioned between the two upright columns (1) at one end, and the tensioning wheel (9) is fixed on one of the upright columns (1) through a connecting rod mechanism (14); the motor (3) is connected with the driven gear (15) through the gearbox and the clutch (16), and the driven gear (15) drives the rotating shaft (8) to rotate; the rocket motor (10) is fixed on the periphery of the rotating shaft (8).

2. The rope ultra-high speed frictional wear testing machine according to claim 1, characterized in that: the device also comprises a test control device, wherein the test control device comprises a speed sensor (7), a tension sensor, a pressure sensor, a data processing device (12) and a recording display device (13); the tension sensor is arranged on the tension wheel (9); the pressure sensor is mounted in the rocket engine (10); the speed sensor (7) is arranged outside the circumference of the rotating shaft (8); the speed sensor (7), the tension sensor and the pressure sensor are all connected with the data processing device (12), and the data processing device (12) is connected with the recording display device (13).

3. The rope ultra-high speed frictional wear testing machine according to claim 1, characterized in that: the number of the rocket motors (10) is at least two, and the rocket motors are equidistantly arranged on the same cross section of the circumference of the rotating shaft (8); the nozzle of the rocket engine (10) is horizontally arranged and is tangential to the rotating direction of the rotating shaft (8).

4. The rope ultra-high speed frictional wear testing machine according to claim 1, characterized in that: the rocket motors (10) are mounted on different cross sections of the circumference of the rotating shaft (8).