JPH03244838A - Braking performance measuring device for damping device - Google Patents

Abstract

PURPOSE:To make braking performance in a braking device measurable from the outside without disassembling rotary equipment by adopting time from the starting of braking operation to the full stoppage and rotational frequency of a turning shaft as an index of the braking performance in the braking device. CONSTITUTION:Simultaneously with output of a braking command signal Ss, a braking start signal Sb is inputted into a down counter 10 of a measuring circuit 5a from a braking device control circuit 6. Receiving this signal, a pulse number as many as corresponding to allowable revolution till a turning shaft 3 is stopped since braking operation by a braking device 2 has started in the counter 10 is preset as a reference value (n). With this, it is subtracted from the reference value (n) one by one at the counter 10 each time a rotating pulse Pr outputted out of a rotary encoder 4a rotating simultaneously with the start of braking operation is inputted into the counter 10. When degradation in braking performance of the braking device 2 progresses, much more pulses Pr than the reference value (n) are inputted into the counter 10 till the turning shaft 3 is stopped, through which a warning lamp 12 is lighted, and a fact that inspection becomes required is known.

Description

[Detailed Description of the Invention] [Summary] The present invention relates to a device for measuring the braking performance of a braking device for a rotating device, and an object of the present invention is to provide a means for easily measuring the braking performance of a braking device for a rotating device. A braking performance measuring device for a braking device of a rotating device, the device comprising: a braking device control circuit for instructing the start of a braking operation of the braking device; a rotation state detection means connected to a rotating shaft of the rotating device; and a rotation state detection device. Based on the rotational state obtained from the means,
The configuration includes a measurement circuit that measures the number of rotations or time from the start of braking operation until the rotation shaft stops, and also includes a reference value set in the measurement circuit and a measurement circuit that measures the number of rotations or the time from the start of the braking operation until the rotation shaft stops. The system is designed so that braking performance can be judged by comparing the number of rotations or time.

[Industrial application field]

The present invention relates to a device for measuring the braking performance of a braking device for rotating equipment.

Since then, the braking system has been inspected and managed, such as replacing braking members such as the brake shoes.

[Conventional technology]

Generally, friction brakes such as drum brakes and disc brakes, which are frequently used as braking devices for rotating equipment, undergo changes over time with use, and their braking performance deteriorates. Therefore, it is necessary to measure the braking performance and maintain and manage the braking device.

For example, a drum brake, which is a type of friction brake,
A brake shoe is pressed onto the inner surface of a drum that is fixed to a rotating shaft of a rotating device such as a motor and rotates together with the rotating shaft to perform a braking operation.

In the above drum brake, when the rotating shaft is rotating, the inner surface of the drum and the brake shoes are brake gears.

However, as the above-mentioned braking operations are repeated, the brake shoes wear out, the brake gap widens, and the braking performance deteriorates.

Therefore, when the brake gap reaches a predetermined value [the problem to be solved by the invention], however, the braking performance of the braking device cannot be measured using the method described above because the braking device is generally located inside rotating equipment. If you try to do so, you will have to disassemble the rotating equipment, which will require more time and personnel for the disassembly work, which will also shorten the operating time of the rotating equipment, which will be a major hindrance to improving work efficiency.

In addition, because it is not possible to constantly monitor changes in braking performance over time, there is a tendency for braking components such as brake shoes and pads to be replaced fairly early in the lifespan, leading to increased operating costs. This is causing a problem.

Furthermore, the wear rate of the braking member as described above varies depending on the material of the braking member, etc., so the values measured by the method described above are not necessarily indicators that objectively represent the braking performance of the braking device. Even if braking members made of the same material are used, if the conditions of use differ, the displacement speed of the brake gap, amount of wear, etc. will differ, making it difficult to uniformly manage the braking devices of rotating equipment.

Therefore, the present invention was proposed to solve the above-mentioned problems, and an object of the present invention is to provide a simple device for measuring the braking performance of a braking device for rotating equipment.

[Means to solve the problem]

In order to achieve the above object, the present invention takes the following measures.

That is, as shown in FIG.
A braking performance measuring device comprising: a braking device control circuit 6 for commanding the start of braking operation of the braking device 2; and a rotating device 1.
Based on the rotational state detection means 4 connected to the rotational shaft 3 and the rotational state obtained from the rotational state detection means 4, the number of rotations from the start of the braking operation until the rotational shaft 3 stops or This is a braking performance measuring device for a braking device, which includes a measuring circuit 5 that measures time.

Furthermore, in the braking performance measuring device, the measuring circuit 5
By comparing the reference value n set to the rotation speed or time measured by the measurement circuit 5, it is possible to judge the braking performance.

[For production]

In FIG. 1, when the braking device control circuit 6 instructs the braking device 2 to start the braking operation, the measuring circuit 5 detects the rotation from the start of the braking operation based on the rotational state obtained from the rotational state detection means 4. Rotating axis 3 until axis 3 stops
The number of rotations or the time is measured, and the measured value is used as an index of the braking performance of the braking device 2.

Further, if the rotational speed or time obtained from the measuring circuit 5 in this manner can be compared with a reference value n set in advance in the measuring circuit 5, the braking performance can be easily judged.

〔Example〕

Hereinafter, the present invention will be explained in more detail based on a first embodiment.

FIG. 2 is a conceptual diagram of one embodiment of the present invention.

As shown in FIG. 2, a brake bag W2 is connected to the rotating shaft 3 of the motor 1a, and a rotary encoder 4
a is also connected, and the rotation pulse P output from the rotary encoder 4a.

is input to the measurement circuit 5a. The braking operation for the rotating shaft 3 of the motor 1a is started by a braking command signal S8 output from the braking device control circuit 6, and the brake pad 8 of the braking device 2 is pressed against the disc 9 rotating together with the rotating shaft 3. done by

From the brake device control circuit 6, the brake command signal S,
Simultaneously with the output of , a braking start signal S is input to the down counter 10 of the measuring circuit 5a, and in response to this, the down counter 10 indicates the allowable time from the start of the braking operation by the braking device 2 until the rotation shaft 3 stops. The number of pulses corresponding to the possible rotational speed is preset as the reference value n.

As a result, the down counter 10 subtracts 1 from the reference value n each time the rotation pulse P representing the rotation state output from the rotary encoder 4a that rotates at the start of the braking operation is input to the down counter 10. Become.

Therefore, as the braking performance of the braking device 2 progresses, more rotation pulses Pr than the reference value n will be input to the down counter 10 until the rotating shaft 3 stops, and at this time, the reference value n will be input to the down counter 10. As soon as the value set as 0 becomes zero, the relay switch 11 inside the measuring circuit 5a turns OFF.
N, the warning lamp 12 is turned on to indicate that the braking performance of the braking device 2 has deteriorated and inspection is required.

Next, a second embodiment of the present invention will be described in the same manner.

FIG. 3 is a conceptual diagram of a second embodiment according to the present invention,
Components common to those in the first embodiment are given the same reference numerals.

A braking command signal S is output from the braking device control circuit 6,
At the same time as the braking operation is started, the braking start signal Sb is input to the time counter 23 of the measuring circuit 5b, and the allowable time from the start of braking until the rotating shaft 3 stops is set in the time counter 23.

Further, the rotation pulse P output from the rotary encoder 4a is input to the f/V conversion circuit 21, and the cough f/V conversion circuit 21 receives the rotation pulse P.

The time counter 2 calculates the voltage value V corresponding to the pulse frequency of
Enter 3. The time counter 23 counts the time until the voltage output from the f/V conversion circuit 21 becomes zero, compares it with the reference value n, and displays a predetermined value as an index of braking performance on the display 24. indicate.

Note that the above reference value n can be treated as a constant value when the manner of use of the rotating device 1 is constant, but since the manner of use of the rotating device 1 is different, the number of rotations at the start of braking is not constant. In this case, as shown in FIG. 4, it is necessary to understand the rotational state of the rotating equipment at the time of starting braking. That is,
A reference value setting circuit 7 is provided, and when the braking start signal Sb is output from the braking device control circuit 6, the reference value setting circuit 7 determines the rotational state (
It is possible to detect the rotational speed), calculate the reference value n based on the rotational state, and preset the reference value n in the measurement circuit 5.

According to the above embodiment of the present invention, the braking performance of the braking device can be measured with a relatively simple configuration, and the time from the start of the braking operation to the stop and the rotation speed of the rotating shaft can be measured. It is possible to indicate a decrease in the braking performance of the braking device using an index based on the above.

It goes without saying that the configurations of the braking device and the measuring circuit are not limited to those of the above-mentioned embodiments, and that various applications can be made without departing from the spirit of the present invention.

[Effects of the present invention]

According to the present invention, since the time from the start of braking operation to complete stop and the rotational speed of the rotating shaft are used as indicators of the braking performance of the braking device, the rotating equipment can be operated without disassembling the rotating equipment. The braking performance of the braking device can be measured from the outside at any time using a device with a simple configuration.

Therefore, the degree of deterioration of the braking device can be grasped at any time, and the service life of consumables such as brake shoes and brake pads can be fully utilized, and operating costs can be reduced. becomes.

Furthermore, if a reference value serving as a standard for braking performance is set in the braking performance measuring device, the braking performance of the rotating equipment can be evaluated more easily.

b) --- Measurement circuit, 6 unit price.

braking device control circuit,

[Brief explanation of drawings]

Fig. 1 is a block diagram showing the concept of the present invention, Fig. 2 is a conceptual diagram of the first embodiment of the invention, Fig. 3 is a conceptual diagram of the second embodiment of the invention, and Fig. 4 is a conceptual diagram of the present invention. FIG. 2 is a block diagram showing the concept of the invention. In the figure, 1 (Ia) 1 rotating device (motor), 2 braking device,
3-rotation shaft, 4 (4a) one-rotation state detection means (rotary encoder), 5 (5a, 5Block diagram illustrating the concept of the present invention FIG. 4)

Claims (1)

[Claims] [1] A braking performance measuring device for a braking device (2) of a rotating device (1), comprising a braking device control circuit (6) that commands the start of braking operation of the braking device (2). and a rotation state detection means (4) connected to the rotation shaft (3) of the rotating device (1), and a braking operation is started based on the rotation state obtained from the rotation state detection means (4). A measurement circuit (5) that measures the number of rotations or time until the rotating shaft (3) stops.
A braking performance measuring device for a braking device, comprising: [2] It is possible to judge the braking performance by comparing the reference value (n) set in the measurement circuit (5) with the rotational speed or time measured by the measurement circuit (5). A braking performance measuring device for a braking device according to claim 1.