Zhao Hengmei Heilongjiang Institute of Science and Technology, Heilongjiang Jixi 158105, the horizontal connection of the motor.
Medium Ding 0421.6+1 Foreword The general mining shearer works in the coal mine. Due to the narrow space of the coal seam limit, the working environment is harsh. Only the hydraulic traction shearer that ensures that the shearer is coupled to the arrangement removes the coal gap to reduce the height of the machine and cancels the main component bottom bracket of the joint. In this way, the problem of joint positioning and anti-loose is particularly prominent. Elbow, 150375 Jia type motor horizontal arrangement hydraulic traction shearer well solved the above problem.
2 The coupling between the components 1 The coupling of the traction portion and the cutting portion 1 is rotated by the axis as the axis of rotation. The angle of rotation is adjusted by the expansion and contraction of the height adjustment cylinder connected to the cutting portion and the cutting portion, and the lifting and lowering of the coal machine drum is completed. The shaft of the pin assembly is designed as a hollow elastic torque rail. It not only transmits the power between the cutting motor and the mechanical transmission system, but also buffers the dynamic load received by the cutting part, improving the reliability of operation, when the shearer is serious. When overloading, because the pin is designed as a weak drive chain, the pin is first broken to protect the main drive chain 1. The truncation part 2 is cut. 3. The pin assembly 2.2 The intermediate box and the traction part are connected horizontally. The shearer is positioned by two large-diameter locating pins on the abutting faces of the middle box and the left and right traction parts, and the butt joints are connected by evenly distributed bolts, but there is not enough space to install the hydraulic locknuts in order to be limited. In the structural space to solve the problem of anti-loose, thief, 150375 shearer designed a new type of dumbbell pin connection. 2. The joint has the following characteristics: the dumbbell pin is designed as a square-shaped square structure at both ends of the cylinder, and the square-shaped joint surface is a slope of 5, the processing technique is simple, and the lateral turbulence positioning is skillfully solved.
First install the two wedge pads on the dumbbell pin, then install the dumbbell pin on the corresponding mating surface of the middle case and the casing of the traction part. If there is a lateral amount of turbulence, it can be between the joint surface of the wedge pad and the middle case. Adjust the pad to adjust so that the two parts cannot be moved laterally. Then use 2 screws to connect the dumbbell pin to the middle box and the traction part respectively, and the self-locking function of the small angle matching surface between the wedge and the wedge pad, control the dumbbell pin 1. Dumb 2 wedge pad 3. Intermediate box 4. Traction Department of single drum hoist, 1 automation transformation Teng Yong Shandong Zaozhuang Mining Group Corporation. Zaozhuang, Shandong 277000 1 Foreword The inclined shaft hoist of Jingting Coal Mine is responsible for the task of raising materials and lifting people's hearts. Before the Ding, type control system, to achieve speed closed loop, electric brake closed-loop operation is very difficult, and some safety protection facilities are difficult to meet the requirements of coal mine safety regulations, so the inclined shaft single drum pure lifting skein in order to accelerate and reduce The process hall is more stable and adopts the manual operation of the main controller to adjust the brake. The winch open loop transport 2 operation features decentralized operation, whether it is the no-load half-load rated load, all are pure negative force operation.
(1) Acceleration process Since the current value is small, the current relay does not operate. For pure, inter-control, the resistance of the motor rotor circuit is cut in step by step. If you do not use manual operation, it will easily cause the start to accelerate and overfire. The flame resistor was not cut. The motor has reached the rated speed. There will be a flying phenomenon.
The constant speed over the container is the largest, and the service exceeds the set speed by about 4.
During the deceleration process, the container runs to the deceleration point. Because of the dead zone, it is easy to cause safety braking. Therefore, it can only be manually operated and decelerated in advance, so that the brake is put into electric brake to control the running speed. This operation is not smooth, random, and poor reliability.
Uplifting operation (1) Accelerating process completes the violation process according to the setting current value and time control. (2) The constant speed process of the container is lower than the running speed of the lowering of the container. 3 After the deceleration process, the container runs to the deceleration point, and the substation is boosted by manual operation. , lift the container to the parking space.
3 questions proposed to raise and decentralize the operation of the two states is completely different, using 10 people, the electronic control system seven methods are now automatically controlled. The conversion force port speed and deceleration process are only controlled by manual operation, and the operation of each driver is different, so that the running speed of the container is not stable.
Etc., Duanyun 1 due to the difference between the speed of the lifting and lowering is about 4, the protection of the overspeed 15 can not meet the requirements of the coal mine safety regulations when lifting and lowering, the speed limit 10 protection often moves, can not be normal upgrade, only By the driver's operation of the adjustable brake and electric brake input, the operation of the container is very unstable, and the phenomenon of the tripping of the pedestrian will often occur when the ghost is severe.
After the deceleration point is fixed, due to different lifting loads, it is necessary to power up when lifting, and raise the container to the wellhead parking position. If the lifting load is small, the pre-parking violation is not in the 2,1 speed limit point protection is extremely easy to overspeed. Action, affecting the normal operation of the winch.
3 Conclusion These two kinds of joints have been applied in the shearer 1, which has been well received by many coal mine users. In particular, the structural design of the dumbbell pin is cleverly designed, which solves the contradiction between the limited space and the function, and does not require special tools to be installed. It can be replaced in time under the well, saving time and having certain economic significance.
He specialized in mining machinery and has long been engaged in the design of shearers. He is now teaching at the Department of Mechanical Engineering of Heilongjiang Institute of Science and Technology.
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