CN204652176U - Based on the coal-winning machine Motor torque axle overload protection arrangement of magnetic converting technique - Google Patents

Abstract

The utility model discloses a shearer motor torque shaft overload protection device based on magneto-rheological technology, which comprises a cutting part gear (3), bearings (2) installed at both ends of the cutting part gear, and a shaft coupling (4 ), cutting part housing (6) and motor (8), also includes torque shaft II (1), torque shaft I (7) and magneto-rheological fluid overload protection device (5); one end of torque shaft II is connected to the cutting The external gear (3) is splined, and the other end is connected to the magneto-rheological fluid overload protection device through a coupling; one end of the torque shaft I is splined to the motor rotor (9) of the motor, and the other end is connected to the magneto-rheological fluid through a coupling. The variable fluid overload protection device is connected; the magneto-rheological fluid overload protection device is fixed on the cutting part housing through a connecting piece (13). When the utility model is overloaded, it can automatically recover, without destroying any structure, without replacing any components, saving time, effectively improving work efficiency, and saving production costs.

Description

Shearer Motor Torque Shaft Overload Protection Device Based on Magnetorheological Technology

technical field

The utility model relates to an overload protection device for a coal shearer, in particular to a shearer motor torque shaft overload protection device based on magneto-rheological technology, which belongs to the technical field of coal shearers.

Background technique

The shearer is usually designed in the form of a torque shaft at the cutting motor, which not only transmits power between the cutting motor and the mechanical transmission system, but also plays an overload protection role. At present, the basic structure of the motor torque shaft of the cutting part of the shearer is a hollow external spline shaft, and there is a U-shaped or V-shaped unloading groove on one side of the shaft to produce a notch effect. The damage form of the torque shaft is mainly torsional damage. When the cutting part is overloaded, the torque shaft breaks at the unloading groove, and then a new torque shaft is replaced. This method brings two problems. One is that it is difficult to replace, and the workload of replacement is large when it breaks. The broken shaft body is not easy to take out, which reduces the working efficiency of the shearer. To replace them again, the single cost is between several thousand to tens of thousands of yuan, which increases the operating cost of the shearer.

Contents of the invention

Aiming at the problems existing in the above-mentioned prior art, the utility model provides a shearer motor torque shaft overload protection device based on magneto-rheological technology, which can realize automatic overload recovery without destroying any structure and without replacing any components, saving time. Improve work efficiency and save costs.

In order to achieve the above purpose, the technical solution adopted by the utility model is: the shearer motor torque shaft overload protection device based on magneto-rheological technology, including the gear of the cutting part, the bearings and couplings installed at both ends of the gear of the cutting part , cutting part housing and motor, and also includes torque shaft II, torque shaft I and magneto-rheological fluid overload protection device; one end of the torque shaft II is splined with the cutting part gear, and the other end is connected to the magnetic motor through a coupling. The rheological fluid overload protection device is connected; one end of the torque shaft I is spline connected to the motor rotor of the motor, and the other end is connected to the magneto-rheological fluid overload protection device through a coupling; the magneto-rheological fluid overload protection device passes through The connecting piece is fixed on the cutting part housing.

Preferably, the magnetorheological fluid overload protection device is mainly composed of a housing, an output shaft, a bearing seat, a driving rotor, a driven rotor I, a driven rotor II, and an input shaft; the housing is composed of a left housing and a right housing Composition, the bearing seat is fixed on the left and right casings through connecting pieces, the output shaft and input shaft respectively pass through the left and right casings, and the output shaft and input shaft outside the casing are respectively installed on the bearings through bearings On the seat, the active rotor is placed between the driven rotor I and the driven rotor II, and there is a magneto-rheological fluid working gap between the active rotor, the driven rotor I, and the driven rotor II; the active rotor and the The input shafts are connected together, the driven rotor I is connected with the output shaft, and the driven rotor II is fixed with the driven rotor I through a connecting piece;

A permanent magnet is also installed on the housing, and the permanent magnet is located in the middle of the upper and lower sides of the driven rotor I. The magnetic field generated by the permanent magnet reaches here through the left and right housings, and passes between the two housings. The working interface between them forms a magnetic field perpendicular to the side of the shell.

Further, an oil seal is provided between the driven rotor II and the input shaft.

Preferably, the magnetorheological fluid working gap of the magnetorheological fluid overload protection device is 1 mm to 3 mm.

Preferably, the driving rotor and the input shaft, the driven rotor I and the output shaft are all connected together by welding.

Preferably, the permanent magnet is made of high-performance NdFeB permanent magnetic material.

Preferably, the connecting parts are bolts or screws.

Preferably, the coupling is a spline coupling.

Compared with the prior art, the utility model is equipped with an independent magneto-rheological fluid overload protection device, and the torque shaft is made into two, and the middle is connected with the magneto-rheological fluid overload protection device, and the torque shaft is still splined with the motor and the torque shaft. Cutting gear connection. Under normal working conditions, the torque shaft drives the master and slave rotors of the magneto-rheological fluid overload protection device to rotate synchronously. The rotation within the rated working range achieves the purpose of protecting other transmission components of the shearer. When the shearer is adjusted to the normal working state, the magnetorheological fluid overload protection device can automatically realize synchronous rotation. When the cutting part is overloaded, it can recover automatically without damaging the torque shaft; the torque shaft can move outwards when the limit clip is loosened, and its original clutch function is preserved. The utility model does not cause torsion damage, does not need to replace the torque shaft, is safe and reliable in operation, is easy to maintain, effectively reduces production costs, and improves productivity. The utility model has simple structure, is easy to manufacture, and has low manufacturing cost.

Description of drawings

Figure 1 is a schematic diagram of the overall structure of the utility model.

Fig. 2 is a structural schematic diagram of a magnetorheological fluid overload protection device of the present invention.

In the figure: 1. Torque shaft Ⅱ, 2. Bearing, 3. Cutting part gear, 4. Coupling, 5. Magneto-rheological fluid overload protection device, 6. Cutting part shell, 7. Torque shaft Ⅰ, 8. Motor, 9. Motor rotor, 10. Output shaft, 12. Bearing seat, 13. Connector, 14. Left housing, 15. Driving rotor, 16. Permanent magnet, 17. Right housing, 18. Driven Rotor I, 19, driven rotor II, 21, oil seal, 22, input shaft.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

As shown in Figure 1, the utility model is based on the magneto-rheological technology of the shearer motor torque shaft overload protection device, including the cutting part gear 3, the bearing 2 installed at the two ends of the cutting part gear 3, and the shaft coupling 4 , cutting part housing 6 and motor 8, and also includes torque shaft II1, torque shaft I7 and magneto-rheological fluid overload protection device 5; one end of the torque shaft II1 is splined to the cutting part gear 3, and the other end is connected through the coupling The shaft device 4 is connected to the magnetorheological fluid overload protection device 5; one end of the torque shaft I7 is splined to the motor rotor 9 of the motor 8, and the other end is connected to the magnetorheological fluid overload protection device 5 through the coupling 4; The above-mentioned magneto-rheological fluid overload protection device 5 is fixed on the cutter housing 6 through the connecting piece 13 .

As shown in Figure 2, as the first preferred solution of the above-mentioned solution in the utility model, the magnetorheological fluid overload protection device 5 is mainly composed of a housing, an output shaft 10, a bearing seat 12, a driving rotor 15, and a driven rotor I18 , driven rotor II 19, and input shaft 22; the housing is composed of a left housing 14 and a right housing 17, and the bearing seat 12 is fixed on the left and right housings 14 and 17 through connecting pieces 13, the The output shaft 10 and the input shaft 22 pass through the left and right housings 14, 17 respectively, and the output shaft 10 and the input shaft 22 outside the housing are respectively installed on the bearing housing 12 through the bearing 2, and the driving rotor 15 is placed from the Between the driving rotor I18 and the driven rotor II19, of course the driving rotor 15 can also be placed at any position between the two driven rotors, but in the middle position, the magnetic field effect is better, the driving rotor 15 and the driven rotor I18, slave There is a magneto-rheological fluid working gap between the moving rotors II19; the driving rotor 15 is connected to the input shaft 22, the driven rotor I18 is connected to the output shaft 10, and the driven rotor II19 is connected to the The driven rotor I18 is fixed together;

A permanent magnet 16 is also installed on the housing, and the permanent magnet 16 is located in the middle of the upper and lower sides of the driven rotor I18. The magnetic field generated by the permanent magnet 16 reaches here through the left and right housings 14 and 17. And a magnetic field perpendicular to the side of the shell is formed at the working interface between the two shells.

The above-mentioned technical scheme, when the torque shaft is overloaded, the driving and driven rotors slip for a short time to play a protective role, and the synchronous operation is restored under normal conditions, which effectively protects the torque shaft and prolongs the service life of the torque shaft. In addition, in order to facilitate the installation of the overload protection device in the present utility model, it is made into an independent structure, which is fixed with the shearer shell 6 through the shell.

As an improvement of the above-mentioned technical solution of the utility model, an oil seal 21 is provided between the driven rotor II 19 and the input shaft 22, which effectively prevents the leakage of the magneto-rheological fluid and further ensures the safety and security of the equipment during operation. reliability.

As the utility model’s second preferred solution to the above technical solution, the magnetorheological fluid working gap of the magnetorheological fluid overload protection device 5 is 1 mm to 3 mm. In actual selection, the staff can choose 1 mm or 2 mm according to the needs of the site. Or 3mm, of course, any value from 1mm to 3mm can also be selected. If the working gap is too small, the processing precision of the driving disc is required to be high and the assembly is difficult. At the same time, the fluidity of the magnetorheological fluid will also be reduced. The torque will also decrease, so it is most appropriate to choose a working gap of 1mm-3mm, which does not require high machining accuracy of the driving disc and will not cause a decrease in magnetic field strength.

As the third preferred solution of the utility model for the above-mentioned technical solution, the driving rotor 15 and the input shaft 22, the driven rotor I18 and the output shaft 10 are all connected together by welding, which has better stability and is not easy to loosen or be damaged. Further effectively guarantee the reliability of equipment operation.

As the fourth preferred solution of the utility model to the above-mentioned technical solution, the permanent magnet 16 is made of high-performance NdFeB permanent magnetic material, which has no power consumption, low residual magnetism and long service life, and reduces the production cost.

As the fifth preferred solution of the utility model to the above-mentioned technical solution, the connecting member 13 is a bolt or a screw, which is convenient for disassembly and installation, and at the same time, it is convenient for replacing parts.

Since the torque transmitted by the spline is relatively large, the coupling 4 is preferably a spline coupling, and the transmission effect is better.

At the working interface, the magnetic field generated by the permanent magnet 16 is transmitted to the working gap of the magnetorheological fluid through the left casing 14, the right casing 17, the driven rotor I18, the driven rotor II19, and the driving rotor 15. The power generated by the motor 8 is transmitted to the torque shaft I7 through the spline coupling, then to the magnetorheological fluid overload protection device 5 through the spline coupling, and then to the torque shaft II1 through another spline coupling, and then transmitted through the spline Give cutter gear 3. The power is transmitted to the input shaft 22 of the magnetorheological fluid overload protection device 5, the driving rotor 15 is then transmitted to the driven rotor I18, the driven rotor II19, and the output shaft 10 through the magnetorheological fluid in the working gap of the magnetorheological fluid. go out. In normal working condition, the magnetorheological fluid can withstand the transmitted torque, thus realizing the synchronous rotation of the driving rotor 15, the driven rotor I18, and the driven rotor II19. When overloaded, the magnetorheological fluid cannot bear the transmitted torque , the active rotor 15 and the driven rotor I18 and driven rotor II19 produce slip, but the motor 8 still rotates within the rated working range, thereby protecting other transmission components of the shearer, prolonging the service life of the equipment and reducing production cost.

Claims (8)

1. A shearer motor torque shaft overload protection device based on magneto-rheological technology, comprising a cutter gear (3), bearings (2) installed at both ends of the cutter gear (3), and a shaft coupling (4 ), the cutting part housing (6) and the motor (8), are characterized in that they also include torque shaft II (1), torque shaft I (7) and magneto-rheological fluid overload protection device (5); the torque One end of shaft II (1) is spline-connected to the cutting gear (3), and the other end is connected to the magneto-rheological fluid overload protection device (5) through a coupling (4); one end of the torque shaft I (7) is connected to The motor rotor (9) of the motor (8) is splined, and the other end is connected to the magnetorheological fluid overload protection device (5) through a coupling (4); the magnetorheological fluid overload protection device (5) passes The connecting piece (13) is fixed on the cutter housing (6). 2. A kind of shearer motor torque shaft overload protection device based on magnetorheological technology according to claim 1, characterized in that, said magnetorheological fluid overload protection device (5) is mainly composed of a housing, an output shaft (10), bearing housing (12), driving rotor (15), driven rotor I (18), driven rotor II (19), input shaft (22); the housing consists of a left housing (14) and the right housing (17), the bearing seat (12) is fixed on the left and right housings (14, 17) through the connecting piece (13), and the output shaft (10) and the input shaft (22) are respectively Through the left and right casings (14, 17), the output shaft (10) and the input shaft (22) located outside the casing are respectively installed on the bearing seat (12) through the bearing (2), and the driving rotor (15 ) is placed between the driven rotor I (18) and the driven rotor II (19), and there is a magneto-rheological Liquid working clearance; the driving rotor (15) is connected with the input shaft (22), the driven rotor I (18) is connected with the output shaft (10), and the driven rotor II (19) is connected through a connecting piece (13) is fixed together with the driven rotor I (18); Permanent magnets (16) are also installed on the housing, and the permanent magnets (16) are located on the upper and lower sides of the driven rotor I (18). The magnetic field generated by the permanent magnets (16) passes through the left and right housings. (14, 17) At this point, a magnetic field perpendicular to the side of the shell is formed at the working interface between the two shells. 3. A shearer motor torque shaft overload protection device based on magneto-rheological technology according to claim 2, characterized in that, between the driven rotor II (19) and the input shaft (22) oil seal (21). 4. A kind of shearer motor torque shaft overload protection device based on magnetorheological technology according to claim 2, characterized in that the magnetorheological fluid working gap of the magnetorheological fluid overload protection device (5) 1 mm to 3 mm. 5. a kind of shearer motor torque shaft overload protection device based on magneto-rheological technology according to claim 3, is characterized in that, described active rotor (15) and input shaft (22), driven rotor I ( 18) and the output shaft (10) are connected together by welding. 6. A magneto-rheological technology-based shearer motor torque shaft overload protection device according to any one of claims 2 to 5, characterized in that the permanent magnet (16) adopts high-performance NdFeB permanent Made of magnetic material. 7. A magneto-rheological technology-based overload protection device for shearer motor torque shaft according to claim 6, characterized in that the connecting piece (13) is a bolt or a screw. 8 . The torque shaft overload protection device of a shearer motor based on magneto-rheological technology according to claim 7 , wherein the coupling ( 4 ) is a spline coupling. 9 .