Coal mine underground winch electric energy recovery device

Abstract

The invention belongs to the technical field of coal mine electric energy storage, and particularly relates to a coal mine underground winch electric energy recovery device which comprises a winch. The forward and reverse rotation detection mechanism is arranged on an output shaft of the winch, and the forward and reverse rotation detection mechanism is used for detecting forward rotation or reverse rotation of the winch; one end of the controllable clutch is fixedly connected with an output shaft of the winch; an input shaft of the generator is fixedly connected with the other end of the controllable clutch; the winch, the forward and reverse rotation detection mechanism and the controllable clutch are electrically connected with a controller. The forward and reverse rotation sensor can automatically control connection or disconnection of the controllable clutch through forward rotation or reverse rotation of the second transmission shaft, the operation safety and efficiency are improved, the structure is simple, work is stable, automation can be achieved on the premise that no extra device is added, meanwhile, voltage rise of the generator is restrained, and energy consumption is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of coal mine electric energy storage, and in particular relates to an electric energy recovery device for a coal mine underground hoist. Background Art

[0002] During the underground operation of the winch, heavy loads are often used for upward movement and light loads for downward movement. Therefore, in order to improve energy efficiency and ensure the safety and reliability of the DC power supply, the gravity energy of the hoist bucket and the winch wire rope can be converted into electrical energy and then fed back to the DC power supply network. However, in order to ensure the safety and reliability of the DC power supply, resistive compensation technology is usually used to reduce the overvoltage on the DC side, but the application of this technology will lead to a large amount of energy waste. By storing energy to recover the electric energy of the winch going down, on the one hand, it can effectively suppress the voltage increase of the generator and ensure the safety of the power system, and on the other hand, it can also make the winch operation achieve the purpose of high efficiency and energy saving.

[0003] Therefore, it is necessary to design an electric energy recovery device for a coal mine underground winch to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to provide an electric energy recovery device for a winch in an underground coal mine to solve the above-mentioned problem and achieve the purpose of suppressing the increase of generator voltage and reducing energy consumption.

[0005] To achieve the above object, the present invention provides the following solution: an electric energy recovery device for a winch in a coal mine, comprising:

[0006] hoist;

[0007] A forward and reverse rotation detection mechanism, which is arranged on the output shaft of the hoist and is used to detect whether the hoist is rotating forward or reverse;

[0008] A controllable clutch, one end of which is fixedly connected to the output shaft of the winch;

[0009] A generator, wherein the generator input shaft is fixedly connected to the other end of the controllable clutch;

[0010] The winch, the forward and reverse detection mechanism, and the controllable clutch are electrically connected to a controller.

[0011] Preferably, the forward and reverse rotation detection mechanism includes a forward and reverse rotation sensor, which is used to detect whether the output shaft of the winch is rotating forward or reverse, and the forward and reverse rotation sensor is electrically connected to the controller.

[0012] Preferably, the forward and reverse magnetic poles include two magnets, and the two magnets are symmetrically distributed on both sides of the output shaft of the winch, the N pole of one magnet faces the forward and reverse sensor, and the S pole of the other magnet faces the forward and reverse sensor.

[0013] Preferably, the controllable clutch is an electromagnetic clutch.

[0014] Preferably, the output shaft of the winch is fixedly connected to one end of a second transmission shaft, and the other end of the second transmission shaft is fixedly connected to the input end of the controllable clutch.

[0015] Preferably, the input shaft of the generator is fixedly connected to the output end of the controllable clutch.

[0016] Preferably, the input shaft of the generator is fixedly connected to one end of a first transmission shaft, and the other end of the first transmission shaft is fixedly connected to an output end of the controllable clutch.

[0017] Preferably, the generator is fixed on the ground via a fixing frame.

[0018] Compared with the prior art, the present invention has the following advantages and technical effects:

[0019] The present invention converts the gravity energy of the hoist bucket and wire rope of the winch into electrical energy and feeds it back to the DC power supply network. Compared with the traditional resistive compensation technology, the device recovers the electric energy of the winch's descent through energy storage, suppresses the voltage increase of the generator, ensures the safety of the power system, and realizes efficient and energy-saving operation of the winch. The device uses a forward and reverse sensor monitoring system to detect the working status of the winch in real time. When it is detected that the winch is in an unloaded descent, the controller realizes the engagement of the winch output shaft with the generator input shaft through a controllable clutch, thereby realizing electrical energy storage. The device has the advantages of energy recovery, voltage suppression, energy conservation and real-time monitoring, which can improve the energy utilization efficiency of the underground winch and ensure the safety and reliability of the power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative labor:

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is the work flow chart of the present invention;

[0023] Figure 3 This is a control degree block diagram of the present invention.

[0024] Among them, 1. fixed frame; 2. generator; 3. first coupling; 4. first transmission shaft; 5. controllable clutch; 6. second transmission shaft; 7. second coupling; 8. forward and reverse sensor; 9. winch. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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.

[0026] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] Reference Figures 1 to 3 As shown, the present invention provides an electric energy recovery device for a coal mine winch, comprising

[0028] Winch 9;

[0029] A forward and reverse detection mechanism, which is arranged on the output shaft of the hoist 9 and is used to detect whether the hoist 9 is rotating forward or reverse;

[0030] A controllable clutch 5, one end of which is fixedly connected to the output shaft of the winch 9;

[0031] Generator 2, the input shaft of generator 2 is fixedly connected to the other end of controllable clutch 5;

[0032] The winch 9, the forward and reverse detection mechanism, and the controllable clutch 5 are electrically connected to a controller.

[0033] According to a further optimized solution, the forward and reverse rotation detection mechanism includes a forward and reverse rotation sensor 8, which is used to detect whether the output shaft of the winch 9 is rotating forward or reversely, and the forward and reverse rotation sensor 8 is electrically connected to the controller.

[0034] A further optimized solution is that the forward and reverse magnetic poles include two magnets, which are symmetrically distributed on both sides of the output shaft of the winch 9, with the N pole of one magnet facing the forward and reverse sensor 8 and the S pole of the other magnet facing the forward and reverse sensor 8.

[0035] The arrow on the detection surface of the forward and reverse sensor 8 probe faces the arc of the magnet rotation and is fixed. When the second transmission shaft 6 rotates, it sweeps the forward and reverse sensor 8 probe along the arrow direction with the magnet, and the blue line outputs a forward signal (low level) and the white line outputs a forward speed pulse signal; conversely, the blue line outputs a reverse signal (high level) and the white line outputs a reverse speed pulse signal.

[0036] In order to realize the output and interruption of the forward and reverse sensor 8 to control the electricity, the forward and reverse sensor 8 is connected to the control circuit, and the correct signal and power lines are connected according to the requirements of the forward and reverse sensor 8 specification; the output and interruption of the forward and reverse sensor 8 control circuit determine whether the controllable clutch 5 is engaged.

[0037] According to a further optimization scheme, the controllable clutch 5 is an electromagnetic clutch.

[0038] According to a further optimization scheme, the output shaft of the winch 9 is fixedly connected to one end of the second transmission shaft 6 , and the other end of the second transmission shaft 6 is fixedly connected to the input end of the controllable clutch 5 .

[0039] According to a further optimized solution, the input shaft of the generator 2 is fixedly connected to the output end of the controllable clutch 5 .

[0040] According to a further optimized solution, the input shaft of the generator 2 is fixedly connected to one end of the first transmission shaft 4 , and the other end of the first transmission shaft 4 is fixedly connected to the output end of the controllable clutch 5 .

[0041] According to a further optimized solution, the generator 2 is fixed on the ground via a fixing frame 1 .

[0042] The generator 2 is welded in the fixing frame 1 to ensure stable fixation. The first transmission shaft 4 is connected to the input shaft of the generator 2 via the first coupling 3, and the connection is ensured to be firm. Subsequently, the first transmission shaft 4 and the second transmission shaft 6 are connected through the controllable clutch 5 to ensure effective power transmission. Finally, the second transmission shaft 6 is connected to the rotating shaft of the winch 9 through the second coupling 7 to ensure good transmission between the two. Such a structural design can ensure the stability and reliability of the device.

[0043] The forward and reverse sensor 8 is used to control the circuit to realize the control of the working state of the controllable clutch 5. The forward and reverse sensor 8 detects the magnet fixed on the second transmission shaft 6 through the Hall principle, and determines the movement direction of the second transmission shaft 6 according to the signal change when the magnet sweeps the forward and reverse sensor 8 probe. When the second transmission shaft 6 rotates forward, the forward and reverse sensor 8 outputs a forward signal and a forward speed pulse signal; when the second transmission shaft 6 rotates reversely, the forward and reverse sensor 8 outputs a reverse signal and a reverse speed pulse signal. These signals can be introduced into the control circuit for processing.

[0044] The control circuit determines the working state of the controllable clutch 5 according to the output signal of the forward and reverse rotation sensor 8. When the forward rotation signal and the forward rotation speed pulse signal exist at the same time, the control circuit can engage the controllable clutch 5, so that the power is transmitted to the first transmission shaft 4. On the contrary, when the reverse rotation signal and the reverse rotation speed pulse signal exist at the same time, the control circuit can disconnect the controllable clutch 5 and stop the power transmission.

[0045] By combining the forward and reverse rotation sensor 8 with the control circuit, precise control of the controllable clutch 5 can be achieved, so that it is automatically engaged or disengaged according to the movement direction of the second transmission shaft 6. Such a control system can provide safe and reliable operation and ensure the coordinated operation of the controllable clutch 5 and the mechanical device.

[0046] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0047] The embodiments described above are only descriptions of the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope of the present invention.

Claims

1. A coal mine underground hoisting machine power recovery device, characterized in that: include Winch (9); a forward and reverse rotation detection mechanism, the forward and reverse rotation detection mechanism being arranged on the output shaft of the hoist (9), the forward and reverse rotation detection mechanism being used to detect whether the hoist (9) is rotating forward or reverse; A controllable clutch (5), one end of which is fixedly connected to the output shaft of the winch (9); A generator (2), wherein an input shaft of the generator (2) is fixedly connected to the other end of the controllable clutch (5); The hoist (9), the forward and reverse detection mechanism, and the controllable clutch (5) are electrically connected to a controller.

2. The electric energy recovery device for a coal mine winch according to claim 1, characterized in that: The forward and reverse rotation detection mechanism comprises a forward and reverse rotation sensor (8), which is used to detect whether the output shaft of the winch (9) rotates forward or reversely, and the forward and reverse rotation sensor (8) is electrically connected to the controller.

3. The electric energy recovery device for a coal mine winch according to claim 2, characterized in that: The forward and reverse magnetic poles include two magnets, which are symmetrically distributed on both sides of the output shaft of the winch (9), the N-pole of one magnet faces the forward and reverse sensor (8), and the S-pole of the other magnet faces the forward and reverse sensor (8).

4. The electric energy recovery device for a coal mine winch according to claim 1, characterized in that: The controllable clutch (5) is an electromagnetic clutch.

5. The electric energy recovery device for a coal mine winch according to claim 2, characterized in that: The output shaft of the hoist (9) is fixedly connected to one end of the second transmission shaft (6), and the other end of the second transmission shaft (6) is fixedly connected to the input end of the controllable clutch (5).

6. The electric energy recovery device for a coal mine winch according to claim 1, characterized in that: The input shaft of the generator (2) is fixedly connected to the output end of the controllable clutch (5).

7. The electric energy recovery device for a coal mine winch according to claim 6, characterized in that: The input shaft of the generator (2) is fixedly connected to one end of a first transmission shaft (4), and the other end of the first transmission shaft (4) is fixedly connected to the output end of the controllable clutch (5).

8. The electric energy recovery device for a coal mine winch according to claim 1, characterized in that: The generator (2) is fixed on the ground via a fixing frame (1).

Images