CN112794175A

CN112794175A - Testing device and testing method for online detection of stopping distance of self-driven elevator traction machine

Info

Publication number: CN112794175A
Application number: CN201911130278.XA
Authority: CN
Inventors: 叶亮; 陈聚; 黄斌; 王永青; 赵正宇
Original assignee: Special Equipment Safety Supervision Inspection Institute of Jiangsu Province
Current assignee: Special Equipment Safety Supervision Inspection Institute of Jiangsu Province
Priority date: 2019-11-13
Filing date: 2019-11-13
Publication date: 2021-05-14

Abstract

The invention discloses a test device and a test method for on-line detection of stopping distance of a self-driven elevator traction machine, wherein the test device comprises the following steps: the test device comprises a test platform, a tested elevator tractor, a coupler, a bearing seat I, an inertia disk seat, a split type inertia disk, a bearing seat II, an encoder and a rotating shaft; the tested elevator traction machine is connected with an input shaft of an inertia disc seat through a coupler, the split type inertia disc is fixed on the inertia disc seat, the inertia disc (comprising the inertia disc seat and the split type inertia disc) is supported through a bearing seat I and a bearing seat II, a rotating shaft of the encoder is connected with a rotating shaft of the inertia disc, and the encoder is fixed on the bearing seat II; measuring a braking rotation angle of the tested elevator traction machine through the encoder feedback signal, and calculating the braking distance of the elevator traction machine through the disc diameter of the traction wheel; the problem of the test of the braking distance under the elevator traction machine laboratory environment is solved, and the requirement of an elevator traction machine manufacturer for detecting the braking distance on line can be met.

Description

Testing device and testing method for online detection of stopping distance of self-driven elevator traction machine

Technical Field

The invention relates to the technical field of elevator test devices, in particular to a test device and a test method for online detection of stopping distance of a self-driven elevator traction machine.

Background

The elevator traction machine stopping distance detection test device is designed according to the standard regulation requirements of GB7588-2003 Elevator manufacturing and installation Specifications, is mainly used for the brake performance test of the elevator traction machine in the no-load and load states, and the existing test system generally adopts a car method for testing. The specific test method comprises the following steps: (1) the elevator leveling stops at the upper part of the travel (about 1/3) and a clear mark is made on the traction rope whose highest point is level with the level; (2) when the cage is unloaded (the load of 125 percent of rated load capacity) and is driven upwards (downwards) at rated speed to the moment that the marking point of the steel wire rope reaches the uppermost part of the traction wheel, one person sends out an instruction, and the other person simultaneously disconnects the main power switch of the elevator; (3) and taking the highest point on the traction sheave after braking as a reference, making a marking point on the steel wire rope as a measuring point, and measuring the distance between the original marking point of the traction steel wire rope and the measuring point, wherein the distance is the upward (downward) braking distance of the elevator. It can be seen from the above measurement method that this measurement requires cooperation of a plurality of persons and that the test is performed on a test tower. The manufacturers of elevator traction machines rarely have the above-mentioned conditions, and the above-mentioned measuring method is obviously not suitable for laboratory conditions. Based on the problems, the invention provides a testing device and a testing method for online detection of stopping distance of a self-driven elevator traction machine under laboratory conditions.

Disclosure of Invention

The invention aims to overcome the defects of the background technology and provide an online detection device for realizing the stopping distance of an elevator traction machine under laboratory conditions.

The technical scheme of the invention is as follows: the split type inertia disc inertia equivalent mode is adopted, the tested elevator traction machine drags the split type inertia disc to operate, and the braking distance of the elevator traction machine is indirectly calculated by measuring the braking rotation angle through the encoder.

In order to achieve the above object, the present invention provides a testing device for online detection of stopping distance of a traction machine of a self-driven elevator, comprising: the test device comprises a test platform, a tested elevator tractor, a coupler, a bearing seat I, an inertia disk seat, a split type inertia disk, a bearing seat II, an encoder and a rotating shaft; the test platform set up in this test device bottom, test platform one end be equipped with be convenient for fix and change by the T type groove of test elevator hauler, the other end is equipped with bearing frame I and bearing frame II respectively, the tested elevator hauler by hauler stopper, hauler drive host computer constitute, hauler drive host computer pass through the shaft coupling and link to each other with inertia disk seat input shaft, split type inertia dish be fixed in on the inertia disk seat through inertia disk seat output shaft, support inertia disk seat and split type inertia dish through bearing frame I and bearing frame II for inertia disk seat and split type inertia dish are in unsettled state, inertia disk seat on be equipped with the pivot, this pivot one end passes split type inertia and inertia disk seat and connects the shaft coupling, the other end connection encoder, the encoder be fixed in on bearing frame II.

The test device further comprises: the circuit of one end of the microprocessor is connected with the encoder, the circuit of the other end of the microprocessor is connected with the frequency converter and the tractor brake in series, and the frequency converter is connected with the tractor driving host.

The encoder adopts a pulse type encoder, covers one of an incremental encoder and an absolute value encoder, and can be directly connected to an input port of the microprocessor.

A test method of a test device for online detection of stopping distance of a traction machine of a self-driven elevator comprises the following steps:

(1) installing a tested elevator traction machine, fixing the elevator traction machine to be tested on a test platform through a T-shaped groove on the test platform, and then connecting a traction machine driving host machine with an inertia disc seat input shaft through a coupler, wherein the traction machine driving host machine is also required to be in circuit connection with a microprocessor through a frequency converter, and a traction machine brake is in circuit connection with the microprocessor;

(2) the testing test is carried out, the frequency converter is started to test the rotating speed of the tested elevator traction machine, the tested elevator traction machine drives the split type inertia disc to operate through coupling joint, the frequency converter is controlled to be directly disconnected by the microprocessor, meanwhile, a brake holding signal of the tested elevator traction machine is opened, the split type inertia disc drives the tested elevator traction machine to operate inertially, the microprocessor is collected to measure the angle of the brake when the brake is opened to the tested elevator traction machine to completely stop operating through the encoder, the traction diameter of the traction wheel is recorded, and the braking distance is calculated finally.

(3) And calculating the braking distance, namely setting a braking rotation angle theta of the tested elevator traction machine measured through a feedback signal of the encoder, and calculating the braking distance of the elevator traction machine through the diameter d of a traction wheel disc

The invention has the beneficial effects that: the invention adopts the structure that the inertia disc seat is coaxially and fixedly installed with the output shaft of the tested elevator traction machine, the additional inertia and the load of the elevator traction machine can be adjusted by adjusting the number and the weight of the split type inertia discs, and meanwhile, the optimization design is further carried out, so that the frequency converter controls the frequency converter to start and stop through the output port of the microprocessor, and the start and stop can be controlled in a communication mode under the condition of not having port control; the problem of the test of the braking distance under the elevator traction machine laboratory environment is solved, and the requirement of an elevator traction machine manufacturer for detecting the braking distance on line can be met.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural diagram of the elevator traction machine under test added for testing according to the present invention;

FIG. 3 is a schematic diagram of the system of the apparatus of the present invention;

FIG. 4 is a schematic structural diagram of a split-type inertia plate according to the present invention;

wherein: 1. the test platform comprises a test platform body 2, a tractor brake 3, a tractor driving host machine 4, a coupler 5, bearing seats I and 6, inertia disk seats 7, a split type inertia disk 8, bearing seats II and 9, an encoder 10 and a rotating shaft.

Detailed Description

The testing device for detecting the stopping distance of the self-driving elevator traction machine provided by the invention on line is described in detail by combining a specific embodiment.

As shown in fig. 1 and 2, a testing device for detecting the stopping distance of a self-driving elevator traction machine on line comprises: the test device comprises a test platform (1), a tested elevator tractor, a coupler (4), a bearing seat I (5), an inertia disc seat (6), a split type inertia disc (7), a bearing seat II (8), an encoder (9) and a rotating shaft (10); the test platform (1) is arranged at the bottom of the test device, one end of the test platform (1) is provided with a T-shaped groove convenient for fixing and replacing a tested elevator traction machine, the other end of the test platform (1) is respectively provided with a bearing seat I (5) and a bearing seat II (8), the tested elevator traction machine consists of a traction machine brake (2) and a traction machine driving host (3), the traction machine driving host (3) is connected with an input shaft of an inertia disc seat (6) through a coupler (4), a split type inertia disc (7) is fixed on the inertia disc seat (6) through an output shaft of the inertia disc seat (6), the inertia disc seat (6) and the split type inertia disc (7) are supported through the bearing seat I (5) and the bearing seat II (8), so that the inertia disc seat (6) and the split type inertia disc (7) are in a suspended state, a rotating shaft (10) is arranged on the inertia disc seat (6), one end of the rotating shaft passes through the split type inertia disc seat (7) and the inertia disc, the other end is connected with an encoder (9), and the encoder (9) is fixed on the bearing seat II (8).

As shown in fig. 3, the test can be carried out in an idle state and a loaded state according to the test requirement, when the idle braking stopping distance test is carried out, the split type inertia disc (7) installed on the inertia disc seat (6) is taken down, the traction machine brake (2) is opened through the microprocessor, the frequency converter is controlled through the microprocessor to start the tested elevator traction machine driving host machine (3) to rotate (according to the test requirement rotating speed), the traction machine driving host machine (3) drives the inertia disc seat (6) to rotate through the rotating shaft (10), and the microprocessor obtains the rotating state of the tested elevator traction machine through the encoder (9); when a braking distance test command is received, the microprocessor cuts off the power supply of the traction machine brake (2), simultaneously sends a reset position signal to the encoder (9), and simultaneously cuts off the power supply loop power supply of the traction machine driving host (3) to ensure that the tested elevator traction machine is in an inertia parking state; the microprocessor counts the pulse number from the test command to the brake state when judging that the tested elevator tractor is in the brake state through the encoder (9), calculates the rotation angle theta of the tested elevator tractor through simple operation, and calculates the brake distance under the no-load state by combining the disc diameter d of the traction wheel

When the braking distance test under the loading state is carried out, a certain number of equivalent split type inertia discs (7) are only needed to be arranged on the inertia disc seat (6) to apply specific load to the tested elevator traction machine, and the braking distance under the loading state can also be measured according to the method in the same way.

As shown in fig. 4, in this embodiment, the split-type inertia disc (7) is selected according to test requirements, the embodiment is a structural schematic diagram of a trisection inertia disc, and the embodiment does not particularly limit the specific size and the specific bisection number of the split-type inertia disc (7).

Claims

1. A self-driven type elevator traction machine stopping distance on-line detection test device is characterized by comprising: the test device comprises a test platform, a tested elevator tractor, a coupler, a bearing seat I, an inertia disk seat, a split type inertia disk, a bearing seat II, an encoder and a rotating shaft; the test platform set up in this test device bottom, test platform one end be equipped with be convenient for fix and change by the T type groove of test elevator hauler, the other end is equipped with bearing frame I and bearing frame II respectively, the tested elevator hauler by hauler stopper, hauler drive host computer constitute, hauler drive host computer pass through the shaft coupling and link to each other with inertia disk seat input shaft, split type inertia dish be fixed in on the inertia disk seat through inertia disk seat output shaft, support inertia disk seat and split type inertia dish through bearing frame I and bearing frame II for inertia disk seat and split type inertia dish are in unsettled state, inertia disk seat on be equipped with the pivot, this pivot one end passes split type inertia and inertia disk seat and connects the shaft coupling, the other end connection encoder, the encoder be fixed in on bearing frame II.

2. The testing device for the on-line detection of the stopping distance of the self-driving type elevator traction machine according to claim 1, characterized by further comprising: the circuit of one end of the microprocessor is connected with the encoder, the circuit of the other end of the microprocessor is connected with the frequency converter and the tractor brake in series, and the frequency converter is connected with the tractor driving host.

3. The device as claimed in claim 1, wherein the encoder is a pulse encoder, and includes one of an incremental encoder and an absolute encoder, which can be directly connected to the input port of the microprocessor.

4. A test method of a test device for on-line detection of stopping distance of a traction machine of a self-driven elevator is characterized by comprising the following steps: