Device for testing braking performance of brake in real time

Abstract

The invention discloses a device for testing the braking performance of a brake in real time, and the device comprises a measurement module, the lower part of the measurement module is provided with a braking distance sensor, the upper part of the measurement module is provided with a braking pressure sensor, and one end of the measurement module is provided with a braking friction force sensor. The ends, away from the shell, of the brake pressure sensor and the brake friction force sensor are each provided with a pressure conduction assembly. The brake distance sensor adopts a rotary encoder principle, and the number of pulse signals output by the brake distance sensor corresponds to the moving distance of the surface of an elevator brake wheel; according to the invention, the braking performance of the elevator brake can be automatically tested in real time without loading a load in the elevator car.

Description

Technical Field

[0001] The invention relates to the technical field of elevator braking performance testing, in particular to a device for real-time testing of brake performance of a brake. Background Art

[0002] The elevator brake is an important part of the elevator. It can provide sufficient braking force for the elevator traction machine, which can not only enable the elevator to decelerate or stop running quickly and smoothly, but also allow the elevator to reliably maintain a stopped moving state. A good-performance elevator brake can effectively prevent various dangers caused by the elevator's inability to effectively decelerate, stop, or move unexpectedly.

[0003] The performance of elevator brakes can be expressed by the following data: braking force (braking force can be divided into braking pressure and braking friction; braking friction can be equivalently expressed by braking torque), braking distance, or braking deceleration. If the above brake performance data is obtained, the braking performance of elevator brakes can be accurately measured.

[0004] The traditional methods for testing elevator braking performance are usually divided into two types: load test method and no-load test method:

[0005] Load test method: place a certain amount of load (such as rated load or 1.25 times rated load) in the car, operate the elevator downward, and suddenly apply the brakes. Use special instruments to measure the stopping distance or stopping deceleration of the car, and judge the quality of the elevator's braking performance. The disadvantages are: a large amount of load needs to be placed in the elevator car, which is labor-intensive; the measurement efficiency is low; when accurate test results are required, special measuring instruments must be used, and the measurement cost is high; when special measuring instruments are not used, the measurement accuracy is low, and the braking performance of the elevator can only be roughly measured; the braking performance of the elevator cannot be tested at any time during daily operation.

[0006] No-load test method: The elevator car is empty, and the elevator is operated to go up to the upper part of the travel at the rated speed. The power supply of the traction machine is manually disconnected, and the stopping situation of the elevator is observed. Special instruments can be used to measure the stopping distance or stopping deceleration of the car, thereby judging the quality of the elevator's braking performance. The disadvantages are: when accurate test results are required, special measuring instruments must be used, and the measurement cost is high; when special measuring instruments are not used, the braking performance of the elevator can only be roughly judged, and the measurement accuracy is low; the measurement efficiency is low; the braking performance of the elevator cannot be tested at any time during daily operation of the elevator.

[0007] In summary, the present application proposes a device for testing the braking performance of a brake in real time. Summary of the invention

[0008] The purpose of the present invention is to provide a device for testing the braking performance of a brake in real time, so as to solve the problems in the prior art.

[0009] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a device for real-time testing of brake performance, comprising a measuring module, a braking distance sensor is installed at the bottom of the measuring module, a braking pressure sensor is installed at the top of the measuring module, a braking friction sensor is installed at one end of the measuring module, and the braking pressure sensor and the braking friction sensor are both installed with pressure conduction components at the end away from the shell.

[0010] Preferably, the pressure transmission assembly consists of a pressure transmission cover and a spring, and the spring is located between the pressure transmission cover and the corresponding sensor.

[0011] Preferably, it also includes a brake pad, a brake arm and a brake wheel, wherein brake arms are provided on both sides of the brake wheel, the brake pad is installed on one side of the brake arm, and the measuring module is installed in the internal space between the brake pad and the brake arm.

[0012] Preferably, the brake pressure sensor of the measuring module is in close contact with the brake arm, the bottom of the measuring module is tightly fixed to the brake pad, the rotating wheel of the brake distance sensor of the measuring module extends from the middle opening of the brake pad and contacts the surface of the brake wheel, and when the brake wheel rotates, the rotating wheel of the brake distance sensor is driven to rotate synchronously.

[0013] Preferably, it further comprises a data processing circuit, and the data processing circuit is connected to the measuring module by a shielded cable.

[0014] Preferably, the data processing circuit includes a preprocessing circuit, an A / D conversion circuit and a CPU, the preprocessing circuit is electrically connected to the A / D conversion circuit, and the A / D conversion circuit is electrically connected to the CPU.

[0015] Preferably, it also includes a brake action switch, a control device, a display device and an alarm device, the output end of the brake action switch is connected to the output end of the control device and the input end of the CPU, and the output end of the CPU is respectively connected to the output end of the display device and the output end of the alarm device.

[0016] A device for real-time testing of brake performance of a brake, wherein the testing method comprises the following steps:

[0017] S1. When the elevator traction mechanism is braked, the brake action switch triggers the measurement module to work; the working pressure of the brake acts on the brake pressure sensor, the brake friction force generated by the brake pad acts on the brake friction sensor, and the brake distance sensor is driven to rotate by the brake wheel;

[0018] S2. When the traction machine brake is in action, the brake pressure sensor and the brake friction sensor are subjected to force and output analog electrical signals, which are then transmitted to the data processing circuit for processing; the analog electrical signals output by the brake pressure sensor and the brake friction sensor are processed by the preprocessing circuit and converted into standard electrical signals, which are then converted into digital signals by the A / D conversion circuit and transmitted to the processor of the data processing circuit to obtain accurate brake pressure and brake friction after calculation;

[0019] S3, when the traction machine brake is actuated, the brake action switch triggers the measurement module to work; the processor starts to count and calculate the pulse signal output by the braking distance sensor to calculate the braking distance of the elevator;

[0020] S4, the display device displays the braking pressure, braking friction and braking distance data;

[0021] S5. When the braking performance data is abnormal, the alarm device will sound an alarm.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. Braking pressure sensor and braking friction sensor; because the braking friction is much higher than the braking pressure, the braking friction sensor can be composed of multiple parallel braking friction sensors when necessary; the braking distance sensor adopts the principle of rotary encoder, and the number of pulse signals output by the braking distance sensor corresponds to the moving distance of the elevator brake wheel surface; this application can test the braking performance of the elevator brake in real time and automatically without loading a load in the elevator car.

[0024] 2. There is no need to place a large amount of load in the elevator, the measurement cost is low, the work intensity is low; no special measuring instruments are required; accurate measurement data can be measured; the measurement efficiency is high; the braking performance of the brake can be tested in real time and automatically during normal operation of the elevator. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0026] Figure 1 It is a structural schematic diagram of the measurement module of the present invention;

[0027] Figure 2 It is a schematic diagram of the structure inside the measurement module of the present invention;

[0028] Figure 3 It is a schematic diagram of the structure of the measuring module and the brake pad of the present invention;

[0029] Figure 4It is a schematic diagram of the structure of the measuring module, brake pad and brake arm of the present invention;

[0030] Figure 5 It is a schematic diagram of the structure of the measuring module, brake pad, brake arm and brake wheel of the present invention;

[0031] Figure 6 The present invention Figure 5 A cross-sectional view of

[0032] Figure 7 It is a schematic diagram of the working state of the measurement module of the present invention;

[0033] Figure 8 It is a schematic diagram of the present invention.

[0034] In the figure: 1. Measuring module; 2. Brake pad; 3. Brake arm; 4. Brake wheel; 11. Brake friction sensor; 12. Brake pressure sensor; 13. Brake distance sensor; 14. Housing; 15. Pressure transmission cover; 16. Spring. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention.

[0036] See also Figure 1-2 In an embodiment of the present invention, a device for real-time testing of brake performance includes a measuring module 1, a braking distance sensor 13 is installed at the lower part of the measuring module 1, a braking pressure sensor 12 is installed at the upper part of the measuring module 1, a braking friction sensor 11 is installed at one end of the measuring module 1, and a pressure conduction component is installed at the end of the braking pressure sensor 12 and the braking friction sensor 11 away from the housing 14; the pressure conduction component is composed of a pressure conduction cover 15 and a spring 16, and the spring 16 is located between the pressure conduction cover 15 and the corresponding sensor.

[0037] like Figure 1-6, also includes a brake pad 2, a brake arm 3 and a brake wheel 4, wherein brake arms 3 are provided on both sides of the brake wheel 4, and the brake arm 3 is located on one side of the brake pad 2 and is installed with the brake pad 2, and the measuring module 1 is installed in the internal space between the brake pad 2 and the brake arm 3; the brake pressure sensor 12 of the measuring module 1 is in close contact with the brake arm 3, and the bottom of the measuring module 1 is tightly fixed to the brake pad 2, the bottom of the measuring module is in close contact with the brake pad 2 and is reliably fixed, and the measuring module and the brake pad cannot move relative to each other; the rotating wheel of the brake distance sensor 13 of the measuring module 1 extends from the middle opening of the brake pad 2 and contacts the surface of the brake wheel 4, and when the brake wheel 4 rotates, it drives the rotating wheel of the brake distance sensor 13 to rotate synchronously.

[0038] like Figure 6-8 ; It also includes a data processing circuit, and the data processing circuit is connected to the measurement module 1 by a shielded cable; the data processing circuit includes a preprocessing circuit, an A / D conversion circuit and a CPU, the preprocessing circuit is electrically connected to the A / D conversion circuit, and the A / D conversion circuit is electrically connected to the CPU.

[0039] It also includes a brake action switch, a control device, a display device and an alarm device. The output end of the brake action switch is connected to the output end of the control device and the input end of the CPU. The output end of the CPU is respectively connected to the output end of the display device and the output end of the alarm device.

[0040] The testing method includes the following steps:

[0041] S1. When the elevator traction machine is braked, the brake action switch triggers the measurement module 1 to work; the working pressure of the brake acts on the brake pressure sensor 12, the brake friction force generated by the brake pad 2 acts on the brake friction sensor 11, and the brake distance sensor 13 is driven to rotate by the brake wheel 4;

[0042] S2. When the traction machine brake is in action, the brake pressure sensor 12 and the brake friction sensor 11 are subjected to force and output analog electrical signals, which are transmitted to the data processing circuit for processing; the analog electrical signals output by the brake pressure sensor 12 and the brake friction sensor 11 are processed by the preprocessing circuit and converted into standard electrical signals, which are then converted into digital signals by the A / D conversion circuit and transmitted to the processor of the data processing circuit, and accurate brake pressure and brake friction are obtained after calculation;

[0043] S3, when the traction machine brake is actuated, the brake action switch triggers the measurement module 1 to work; the processor starts to count and calculate the pulse signal output by the braking distance sensor 13, and calculates the braking distance of the elevator;

[0044] S4, the display device displays the braking pressure, braking friction and braking distance data;

[0045] S5. When the braking performance data is abnormal, the alarm device will sound an alarm.

[0046] Braking pressure sensor and braking friction sensor; because the braking friction is much higher than the braking pressure, the braking friction sensor can be composed of multiple parallel braking friction sensors when necessary; the braking distance sensor adopts the principle of rotary encoder, and the number of pulse signals output by the braking distance sensor corresponds to the moving distance of the elevator brake wheel surface; this application can test the braking performance of the elevator brake in real time and automatically without loading a load in the elevator car.

[0047] The working principle of the present invention is: when the elevator traction machine is braked, the brake action switch triggers the measuring module 1 to work. The working pressure (F) of the brake acts on the brake pressure sensor, and the brake friction force (T1=T2) generated by the brake pad acts on the brake friction force sensor. The brake distance sensor is driven to rotate by the brake wheel;

[0048] When the traction machine brake is in action, the brake pressure sensor and brake friction sensor output analog electrical signals (generally analog current signals) after being subjected to force, and are transmitted to the data processing circuit for processing. The analog electrical signals output by the brake pressure sensor and brake friction sensor are processed by the preprocessing circuit and converted into standard electrical signals (4mA~20mA current signals, or 1V~5V voltage signals), and then converted into digital signals by the A / D conversion circuit, and transmitted to the processor of the data processing circuit, and accurate brake pressure and brake friction are obtained after calculation;

[0049] When the traction machine brake is actuated, the brake action switch triggers the measurement module 1 to work; the processor starts to count and calculate the pulse signal output by the braking distance sensor to calculate the braking distance of the elevator;

[0050] The measurement data processing circuit can process, calculate, store and display the measurement data (brake pressure, brake friction and brake distance data);

[0051] When the braking performance data is abnormal, the measurement data processing circuit can quickly send out an alarm signal.

[0052] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A device for real-time testing of brake performance, comprising a measuring module (1), characterized in that: A braking distance sensor (13) is installed at the bottom of the measuring module (1), a braking pressure sensor (12) is installed at the top of the measuring module (1), a braking friction sensor (11) is installed at one end of the measuring module (1), and a pressure conduction component is installed at the end of the braking pressure sensor (12) and the braking friction sensor (11) away from the housing (14).

2. The device for real-time testing of brake performance according to claim 1, characterized in that: The pressure transmission component is composed of a pressure transmission cover (15) and a spring (16), wherein the spring (16) is located between the pressure transmission cover (15) and the corresponding sensor.

3. The device for real-time testing of brake performance according to claim 1, characterized in that: The invention also comprises a brake pad (2), a brake arm (3) and a brake wheel (4), wherein brake arms (3) are arranged on both sides of the brake wheel (4), the brake arm (3) is located on one side of the brake pad (2) and is installed with the brake pad (2), and the measuring module (1) is installed in the internal space between the brake pad (2) and the brake arm (3).

4. The device for real-time testing of brake performance according to claim 3, characterized in that: The brake pressure sensor (12) of the measuring module (1) is in close contact with the brake arm (3), the bottom of the measuring module (1) is tightly fixed to the brake pad (2), the rotating wheel of the brake distance sensor (13) of the measuring module (1) extends from the middle opening of the brake pad (2) and contacts the surface of the brake wheel (4), and when the brake wheel (4) rotates, the rotating wheel of the brake distance sensor (13) is driven to rotate synchronously.

5. A device for real-time testing of brake performance according to claim 3 or 4, characterized in that: It also comprises a data processing circuit, and the data processing circuit is connected to the measuring module (1) by a shielded cable.

6. The device for real-time testing of brake performance according to claim 5, characterized in that: The data processing circuit includes a preprocessing circuit, an A / D conversion circuit and a CPU. The preprocessing circuit is electrically connected to the A / D conversion circuit, and the A / D conversion circuit is electrically connected to the CPU.

7. The device for real-time testing of brake performance according to claim 6, characterized in that: It also includes a brake action switch, a control device, a display device and an alarm device. The output end of the brake action switch is connected to the output end of the control device and the input end of the CPU. The output end of the CPU is respectively connected to the output end of the display device and the output end of the alarm device.

8. The device for real-time testing of brake performance according to claim 7, characterized in that: The testing method includes the following steps: S1. When the elevator traction machine is braked, the brake action switch triggers the measuring module (1) to work; the working pressure of the brake acts on the brake pressure sensor (12), the brake friction force generated by the brake pad (2) acts on the brake friction force sensor (11), and the brake distance sensor (13) is driven to rotate by the brake wheel (4); S2. When the traction machine brake is actuated, the brake pressure sensor (12) and the brake friction sensor (11) output analog electrical signals after being subjected to force, which are transmitted to the data processing circuit for processing; the analog electrical signals output by the brake pressure sensor (12) and the brake friction sensor (11) are processed by the preprocessing circuit and converted into standard electrical signals, which are then converted into digital signals by the A / D conversion circuit and transmitted to the processor of the data processing circuit, and accurate brake pressure and brake friction are obtained after calculation; S3, when the traction machine brake is actuated, the brake action switch triggers the measurement module (1) to work; the processor starts counting and calculating the pulse signal output by the braking distance sensor (13), and calculates the braking distance of the elevator; S4, the display device displays the braking pressure, braking friction and braking distance data; S5. When the braking performance data is abnormal, the alarm device will sound an alarm.

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