Winding motor speed regulating system

Abstract

The utility model discloses a speed regulation system of a winch motor, which belongs to the technical field of electrical automation, solves the problem that the winch motor lacks a reliable speed regulation system and has operation risks, and comprises the winch motor, an encoder and a direct current speed regulation cabinet, the direct current speed regulation cabinet comprises a direct current speed regulation main cabinet and a direct current speed regulation standby cabinet, the direct-current speed regulation main cabinet and the direct-current speed regulation standby cabinet are connected in a switchable mode, the direct-current speed regulation main cabinet and the direct-current speed regulation standby cabinet are each connected with a winch motor, a coded disc is arranged on a rear shaft of each winch motor and connected with an encoder through a flexible coupler, the encoders are arranged on an encoder support, the encoder supports are connected with the winch motors, and the winch motors are connected with the coded discs through flexible couplings. The direct current speed regulation main cabinet and the direct current speed regulation standby cabinet are further connected with a PLC control system, and the PLC control system is connected with an operation station through a switch. According to the utility model, the stability of the encoder in the direct-current speed regulation system of the winch motor is improved, and the stability of the encoder in the direct-current speed regulation system of the winch motor is greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of electrical automation, and in particular relates to a winch motor speed regulating system. Background Art

[0002] The hoisting motor is the key equipment of the blast furnace charging trolley, and the DC speed control device is the core equipment of the hoisting motor speed control. In order to ensure stable production operation, a speed feedback encoder is installed behind each hoisting motor as the speed feedback of the DC speed control work, so the encoder plays a key role and can be used at any time to prevent failure.

[0003] The current winch motor operation application lacks a reliable speed control system, and is usually carried out through manual speed control. At the same time, the rear end of the winch motor can only be hard-connected through a nylon rod, which makes it impossible to ensure the concentricity of the encoder shaft and the motor shaft during installation. There is radial force during installation, which causes the encoder shaft to break due to radial stress fatigue during long-term operation, and then the DC speed control system of the winch motor cannot work normally. This untimely and inaccurate speed control method will increase the risk of blast furnace winch feeding. If the risk occurs, it will cause a reduction in the oxygen enrichment of the blast furnace, causing the blast furnace material line to drop to 4 meters, which will bring huge economic losses to the enterprise. Utility Model Content

[0004] The utility model aims to provide a hoisting motor speed regulating system to solve the problem of operation risk caused by lack of a reliable speed regulating system for the hoisting motor.

[0005] The technical scheme of the utility model is: a winch motor speed regulation system, comprising a winch motor, an encoder and a DC speed regulation cabinet, the DC speed regulation cabinet comprising a DC speed regulation main cabinet and a DC speed regulation standby cabinet, the DC speed regulation main cabinet and the DC speed regulation standby cabinet are switchably connected, the DC speed regulation main cabinet and the DC speed regulation standby cabinet are respectively connected with the winch motor, the rear axle of the winch motor is provided with a code disk, the code disk is connected with the encoder through a flexible coupling, the encoder is arranged on an encoder bracket, the encoder bracket is connected with the winch motor, the DC speed regulation main cabinet and the DC speed regulation standby cabinet are also connected with a PLC control system, and the PLC control system is connected with an operation station through a switch.

[0006] The beneficial effects of the utility model are as follows:

[0007] When the main DC speed regulation cabinet is put into use, the encoder connected to the main cabinet plays a role in speed regulation feedback, and the encoder connected to the DC speed regulation standby cabinet is used as a backup in real time. Once the main cabinet fails, it will immediately switch to the standby cabinet. At the same time, the encoder on the standby cabinet will be put into the speed regulation link. The PLC control system collects the encoder speed signals on the normal cabinet and the standby cabinet. In the program, by comparing the encoder speed difference between the normal cabinet and the standby cabinet, a screen alarm will be issued in time if the speed difference is too large, reminding maintenance personnel to check whether the encoder shaft is broken, eliminate equipment hazards in advance, and ensure normal production operation.

[0008] The utility model improves the stability of the encoder in the DC speed regulation system of the hoisting motor by adopting a new connection mode between the hoisting motor and the encoder and the mutual cooperation of the PLC control system, overcomes the problem that the encoder shaft is damaged by the hard connection of the nylon rod on the rear shaft of the original hoisting motor and the encoder, realizes the improvement of the encoder shaft of the hoisting motor from a rigid connection to a flexible connection, effectively solves the risk that the encoder cannot be ensured to be concentric with the motor shaft and the radial force exists, resulting in the radial stress fatigue fracture of the encoder during long-term operation, and the DC speed regulation system of the hoisting motor cannot work normally, greatly improves the stability of the encoder in the DC speed regulation system of the hoisting motor, has the characteristics of improving the safety and reliability of equipment, and is of great significance to the stable feeding production of the blast furnace hoist. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is the overall connection schematic diagram of the utility model;

[0010] Figure 2 This is a schematic diagram of the structure of the motor and encoder in the utility model.

[0011] In the figure: 1- winch motor; 2- code disk; 3- flexible coupling; 4- encoder bracket; 5- encoder; 6- DC speed regulation main cabinet; 7- DC speed regulation standby cabinet; 8- PLC control system; 9- switch; 10- operation station. DETAILED DESCRIPTION

[0012] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0013] like Figure 1-Figure 2As shown, a winch motor speed control system includes a winch motor 1, an encoder 5 and a DC speed control cabinet. The DC speed control cabinet includes a DC speed control main cabinet 6 and a DC speed control standby cabinet 7. The DC speed control main cabinet 6 and the DC speed control standby cabinet 7 can be switchably connected. The DC speed control main cabinet 6 and the DC speed control standby cabinet 7 are respectively connected to the winch motor 1. The rear axle of the winch motor 1 is provided with a code disk 2, and the code disk 2 is connected to the encoder 5 through a flexible coupling 3. The encoder 5 is arranged on an encoder bracket 4, and the encoder bracket 4 is connected to the winch motor 1. The DC speed control main cabinet 6 and the DC speed control standby cabinet 7 are also connected to a PLC control system 8, and the PLC control system 8 is connected to an operating station 10 through a switch 9.

[0014] When in use, first drill a hole on the rear shaft of the hoisting motor 1, fix the code disc 2 to the rear shaft of the hoisting motor 1 by planting wire, then install the encoder 5 on the encoder bracket 4, and then use the flexible coupling 3 to connect the shaft of the code disc 2 and the shaft of the encoder 5 together, and finally fix the encoder bracket 4 on the hoisting motor 1.

[0015] The flexible coupling 3 has the characteristics of simple structure, light transmission mass and low noise. The code disk 2 has the advantages of strong resolution, high measurement accuracy and reliable operation. Through this connection method, the problem of the encoder 5 on the rear shaft of the winch motor 1 being hard-connected by a nylon rod, which makes it impossible to ensure the concentricity of the encoder 5 axis and the winch motor 1 axis, and there is a radial force, causing the encoder 5 axis to fracture due to radial stress fatigue during long-term operation, and causing the DC speed control system of the winch motor 1 to fail to work normally, is overcome.

[0016] The speed signals of the encoders 5 connected to the DC speed regulating main cabinet 6 and the DC speed regulating standby cabinet 7 are collected through the winch PLC control system 8. The PLC control system 8 communicates with the operating station 10 through the switch 9. A program is written in the PLC control system 8 to compare the speed difference between the two encoders 5. When the difference is greater than 0.5, the signal is transmitted to the operating station 10 through the switch 9. A text machine voice alarm pops up on the display screen of the operating station 10 to remind the maintenance personnel to check and replace the encoder 5 in time when the shaft is broken, and switch to the DC speed regulating standby cabinet 7 at the same time, so as to ensure the normal operation of the DC speed regulating system of the winch motor 1.

[0017] By collecting the speed signals of the encoder 5 on the DC speed regulating main cabinet 6 and the DC speed regulating standby cabinet 7 of the hoisting motor 1 in the PLC control system 8, and comparing the speed difference of the encoder 5 on the DC speed regulating main cabinet 6 and the DC speed regulating standby cabinet 7 in the program, the effect of timely screen alarm when the speed difference is too large is achieved, reminding the maintenance personnel to check whether the encoder 5 has a broken shaft, eliminating the hidden dangers of the equipment in advance, and ensuring the stable production operation of the hoisting trolley to feed the blast furnace.

Claims

1. A winch motor speed control system, characterized in that: The invention comprises a hoisting motor (1), an encoder (5) and a DC speed regulating cabinet, wherein the DC speed regulating cabinet comprises a DC speed regulating main cabinet (6) and a DC speed regulating standby cabinet (7), wherein the DC speed regulating main cabinet (6) and the DC speed regulating standby cabinet (7) are switchably connected to each other, wherein the DC speed regulating main cabinet (6) and the DC speed regulating standby cabinet (7) are respectively connected to the hoisting motor (1), wherein a code disc (2) is provided on the rear axle of the hoisting motor (1), wherein the code disc (2) is connected to the encoder (5) via a flexible coupling (3), wherein the encoder (5) is provided on an encoder bracket (4), wherein the encoder bracket (4) is connected to the hoisting motor (1), wherein the DC speed regulating main cabinet (6) and the DC speed regulating standby cabinet (7) are further connected to a PLC control system (8), wherein the PLC control system (8) is connected to an operating station (10) via a switch (9).

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