CN214502859U

CN214502859U - Traction machine brake action test device

Info

Publication number: CN214502859U
Application number: CN202120483801.3U
Authority: CN
Inventors: 何健聪; 刘嘉晋
Original assignee: Guangzhou Guangri Elevator Industry Co Ltd
Current assignee: Guangzhou Guangri Elevator Industry Co Ltd
Priority date: 2021-03-05
Filing date: 2021-03-05
Publication date: 2021-10-26
Anticipated expiration: 2031-03-05

Abstract

The utility model discloses a traction machine brake action test device, which comprises a mounting mechanism, a weighing sensor, a limit switch and a telescopic mechanism; the hanging and carrying mechanism is composed of a first weight, a second weight and a steel wire rope, the weight of the first weight is larger than that of the second weight, the two ends of the steel wire rope are respectively connected with the first weight and the second weight, the middle section of the steel wire rope is hung on the traction sheave and ensures that the steel wire rope does not slide, the telescopic mechanism is arranged below the first weight, the weighing sensor is arranged at the top end of the telescopic mechanism, and the limit switch is arranged at the side of the weighing sensor and abuts against the bottom surface of the first weight. The hanging mechanism formed by combining two weights with unequal weight and a steel wire rope simulates the state that the weight of a car and the weight of a counterweight are unequal, and the limit switch measures whether the first weight displaces to test whether the closing state of the brake reaches the standard.

Description

Traction machine brake action test device

Technical Field

The utility model belongs to the technical field of elevator hauler stopper, especially, relate to a hauler stopper moves test device.

Background

The traction machine is a power device of the elevator, and is used for conveying and transmitting power to operate the elevator. It is composed of motor, brake, coupling, speed reducer, traction wheel, machine frame, guide wheel and auxiliary handwheel. The brake is installed on the axle of the traction sheave. The brake of the elevator traction machine is subjected to action tests for no less than 200 ten thousand times according to national standard regulations, and the performance of the brake is ensured to be still in accordance with the national standard regulations after the tests are finished.

However, the above test is usually performed in a state where a hoisting machine sample is placed, and cannot simulate the operating state of the brake in the entire elevator. When the elevator of the whole elevator is not in operation, the traction machine can be subjected to moment generated by unequal weight of the elevator car and the counterweight. This torque approaches the rated torque of the machine and can cause radial pressure on the brake and wear of the moving parts. Along with the increase of the use times, the deformation and the abrasion of the movable part of the brake are more serious, resistance is generated for the opening and closing of the brake, and the operation of the brake is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an elevator hauler stopper system action test device, simulation hauler stopper is experimental under bearing load state in actual operating environment.

The utility model discloses a realize through following technical scheme:

a brake action test device of a traction machine comprises a mounting mechanism, a weighing sensor, a limit switch and a telescopic mechanism; the hanging mechanism is composed of a first weight, a second weight and a steel wire rope, the weight of the first weight is larger than that of the second weight, two ends of the steel wire rope are respectively connected with the first weight and the second weight, the middle section of the steel wire rope is hung on the traction sheave and ensures that the steel wire rope does not slide, the telescopic mechanism is arranged below the first weight, the weighing sensor is arranged at the top end of the telescopic mechanism, and the limit switch is arranged at the side of the weighing sensor and abuts against the bottom surface of the first weight.

By the proposal, the utility model discloses at least, obtain following technological effect:

the hanging mechanism generates unbalanced moment through two weights with different weights, applies the moment to the traction sheave by hanging the hanging mechanism on the traction sheave without slipping, and further acts on a brake arranged on a wheel shaft of the traction sheave, so that the stress effect of the brake in the actual use state is simulated. For the combined floodgate effect of accurate measurement stopper, in the bigger first heavy object below of weight, set up the telescopic machanism that is used for the bearing, be used for measuring the weight difference's of two heavy objects weighing sensor and limit switch. After the brake is switched on and the position of the hanging device is static, the telescopic mechanism is contracted to separate the weighing sensor from the first weight, and the limit switch is abutted against the bottom surface of the first weight without pressure. If the brake is in an unqualified closing state, the traction sheave carriage rotates, so that the first heavy object presses down the limit switch to stop running.

Preferably, still include control terminal, control terminal respectively with weighing sensor, limit switch and telescopic machanism electric connection.

Preferably, the weighing device further comprises a weighing display, and the weighing display is electrically connected with the weighing sensor.

Preferably, the control terminal is further electrically connected with a brake feedback switch of the brake.

Preferably, the control terminal is a programmable controller.

Preferably, the device further comprises a counter, and the counter is electrically connected with the control terminal.

Preferably, the telescopic mechanism is an electric cylinder, a hydraulic cylinder or a mechanical screw.

The utility model has the advantages that:

the state that the weight of a lift car and the weight of a counterweight are unequal is simulated by a mounting mechanism formed by combining two weights with unequal weight and a steel wire rope, the mounting mechanism is supported and adjusted by a telescopic mechanism, and a weighing sensor measures circumferential torque which can be provided by the mounting mechanism and enables the circumferential torque to be equal to the torque applied to the brake in the actual use environment. And finally, measuring whether the first heavy object is displaced through a limit switch to test whether the closing state of the brake reaches the standard. The device has simple structure, low cost and high reliability.

Drawings

Fig. 1 is a schematic view of an elevator traction machine brake motion test apparatus according to an embodiment of the present invention.

Legend:

1, a traction machine; 2, mounting a mechanism; 3, a weighing sensor; 4, a limit switch; 5, a telescopic mechanism; 6 a programmable controller; 7 weighing the display; 8, a counter;

11 a traction sheave; 12, a brake; 13 a feedback switch;

21 a first weight; 22 a second heavy object; 23 steel cords.

Detailed Description

The present invention will be further explained with reference to the drawings and examples.

Example 1:

as shown in fig. 1, the present embodiment provides a brake test device for a brake 12 of an elevator traction machine 1, which comprises a mounting mechanism 2, a weighing sensor 3, a limit switch 4, a telescopic mechanism 5 and a control terminal.

The mounting device is composed of a first weight 21, a second weight 22 and a wire rope 23, and the first weight 21 and the second weight 22 are respectively fastened at two ends of the wire rope 23. The middle section of the wire rope 23 is hung on the traction sheave 11, and the wire rope 23 and the traction sheave 11 can be ensured not to slide in a winding mode. The weight of the first weight 21 is greater than that of the second weight 22, and the moment generated by the weight difference of the two weights simulates the moment generated by the unequal weight of the car and the counterweight. The weight difference can be adjusted by replacing two weights of different weights.

The telescopic mechanism 5 is provided below the first weight 21 so as to lift the first weight 21 in a state where the traction sheave 11 cannot be locked in a brake-off state of the brake 12, and to keep the entire mounting mechanism 2 in a balanced state.

The top of the telescopic mechanism 5 is provided with a weighing sensor 3, a limit switch 4 is arranged on the side of the weighing sensor, and a top switch button of the limit switch 4 is abutted against the bottom surface of the first heavy object 21. The weighing sensor 3 is electrically connected with the weighing display 7 and is used for displaying the weight difference of the two weights.

A control terminal is added for the convenience of centralized control, and the control terminal is electrically connected with the weighing sensor 3, the limit switch 4 and the telescopic mechanism 5 respectively. And the control terminal is also electrically connected with the controller. The feedback switch 13 on the brake 12 is used for feeding back the instant state of the brake 12 to the control terminal, and the control terminal compares the instant state with the command sent by the control terminal to ensure that the state of the controller is consistent with the command of the control terminal.

The control terminal is a programmable controller 6. The telescopic mechanism 5 is an electric cylinder, a hydraulic cylinder or a mechanical screw.

Adopt above-mentioned elevator hauler 1 stopper 12 braking to do test device

The method comprises the following steps: the first weight 21 and the second weight 22 are mounted on both ends of the wire rope 23 to form the loading mechanism 2, and the loading mechanism 2 is hung on the rim of the traction sheave 11.

Step two: the telescopic mechanism 5 selects an electric cylinder, the programmable controller 6 sends an instruction to enable the electric cylinder to extend to lift the first heavy object 21 with larger weight, the weight difference between the first heavy object 21 and the second heavy object 22 is read through the weighing display 7, the circumferential moment generated by the mounting mechanism 2 is calculated according to the weight difference, and the circumferential moment is adjusted to be equal to the moment born in the actual use environment of the brake 12.

Step three: the programmable controller 6 gives a command to close the brake 12, and the programmable controller 6 gives a command to contract the electric cylinder, so that the weighing sensor 3 is separated from contact with the first weight 21 and the switch button of the limit switch 4 is in contact with the bottom surface of the first weight 21 without pressure. If the brake 12 locks the bad traction sheave 11 to rotate under the driving of the moment, the first heavy object 21 presses the limit switch 4, and the limit switch 4 feeds back a signal to the control terminal to give an alarm.

Step four: the programmable controller 6 receives the information fed back by the feedback switch 13 on the brake 12, and compares the information with the self instruction. If the two are consistent, a sequential count-up instruction is issued to the counter 8. If the two are not consistent, an alarm is sent out.

Various technical features in the above embodiments may be arbitrarily combined as long as there is no conflict or contradiction in the combination between the features, but is limited to the space and is not described one by one.

The present invention is not limited to the above embodiment, and various modifications and variations of the present invention are intended to be included within the scope of the claims and the equivalent technology if they do not depart from the spirit and scope of the present invention.

Claims

1. A traction machine brake action test device is characterized in that: the device comprises a mounting mechanism, a weighing sensor, a limit switch and a telescopic mechanism; the hanging mechanism is composed of a first weight, a second weight and a steel wire rope, the weight of the first weight is larger than that of the second weight, two ends of the steel wire rope are respectively connected with the first weight and the second weight, the middle section of the steel wire rope is hung on the traction sheave and ensures that the steel wire rope does not slide, the telescopic mechanism is arranged below the first weight, the weighing sensor is arranged at the top end of the telescopic mechanism, and the limit switch is arranged at the side of the weighing sensor and abuts against the bottom surface of the first weight.

2. The traction machine brake action test device according to claim 1, further comprising a control terminal electrically connected to the weighing sensor, the limit switch, and the telescoping mechanism, respectively.

3. The traction machine brake action test device according to claim 2, further comprising a weighing display, wherein the weighing display is electrically connected to the weighing sensor.

4. The hoisting machine brake actuation test apparatus of claim 2, wherein the control terminal is further electrically connected to a brake feedback switch of the brake.

5. The hoisting machine brake actuation test apparatus according to claim 2, wherein the control terminal is a programmable controller.

6. The hoisting machine brake actuation test apparatus according to claim 1, further comprising a counter electrically connected to the control terminal.

7. The traction machine brake actuation test device according to claim 1, wherein the telescoping mechanism is selected from an electric cylinder, a hydraulic cylinder, or a mechanical screw.