The oil supply pressure of the thin oil station is adjusted to 3妃, 3, and there is no phenomenon that the lubricating oil overflows the machine outside the bowl-shaped bearing part. 2 After each replacement of the bushing, the running time of the empty car should be extended to more than 1爿; when the heavy truck is running, the load should be gradually increased before it can be put into full load. After the above measures were taken, the cone crusher of our unit did not have such a bushing accident. The bowl bearing has never been damaged or abnormally worn due to the above changes. It proves that our analysis of the cause of the accident and the measures taken are In line with the actual situation. Hazard of reversal of port piston air compressor Jiang Lihua Xinwen Mining Group Technical School Shandong Xintai 271213 plug air compressor is forbidden to adjust the phase sequence of the power supply during maintenance. After the inspection, 1 must be tested, pay attention to the motor rotation direction to prevent the motor Reverse. In short, the motor cannot be reversed. Many people have questioned this. From the perspective of the structure and working principle of the air compressor, the motor reverses and the crankshaft steering changes, but it does not affect the movement of the connecting rod piston. The air compressor can still generate compressed air. Why is this so? The regulations, this question, should be analyzed from the lubrication system of the air compressor. Air compressor transmission 1. Oil filter box 2. Oil pipe 3. Gear oil pump 4. Pressure 5, oil 01 regulating valve 6. Oil filter 7. Oil cooler 8. Connecting rod big head tile 9. Vertical cylinder cross head 10. Cylinder crosshead oil passage. Horizontal cylinder crosshead 12. Horizontal cylinder crosshead slide 13. Oil pool 14. Crankshaft 5. Crankshaft main bearing moving mechanism lubrication system Gear oil pump 3 is directly driven by the hollow shaft on the crankshaft, oil through the fuselage oil pool After coarse filtration, it is again pressurized by the oil cooler 7 and then discharged through the oil filter 6, and then filtered through the oil filter 6 through the oil pipe through the hollow shaft of the oil pump drive gear and the crankshaft center oil hole to the connecting rod bearing. And flowing along the inner oil hole of the connecting rod to the small-head bearing bush and the cross-head pin of the connecting rod, and finally flowing into the cross-head rail on the fuselage, thereby completing the lubrication of each friction part. The gear oil pump is composed of a pair of gears and a pump body, and its structural principle is 2. One gear is a driving wheel and one is a driven wheel. When a pair of meshing teeth are disengaged in the oil suction chamber, due to the expansion of the volume, a low pressure oil is formed, and the oil filled in the tooth groove moves along the pump wall to the oil discharge chamber, when the gear teeth are engaged, due to the volume Reduced to produce pressure oil. If the motor is reversed, the drive wheel of the gear oil pump will also reverse on the crankshaft drive. The original oil discharge chamber will become the oil suction chamber, and the original oil suction chamber will become the oil discharge chamber. That is to say, the oil pump will pass through the oil pipe from each friction part. The oil is sucked and then discharged to the fuselage oil pool, so that the friction parts are not lubricated, causing mechanical accidents such as seizure or burn of the sliding parts. Therefore, the piston air compressor is strictly prohibited from reversing. Improvement of the mouth hydraulic column disassembly machine Yu Zhiwei Huainan Gonggong College Anhui 232001 7 The staff engaged in the maintenance of the hydraulic support will inevitably encounter the disassembly and assembly of the column 3. The manual disassembly is not only time-consuming and laborious, but also cannot guarantee the assembly of the column. Accuracy, reducing the service life of the column, and even damage the end cover and grain. Although the hydraulic column disassembly machine can greatly improve labor efficiency and working time utilization, there are still many questions about the slow disassembly and assembly process, and it is not possible to complete the disassembly and assembly work continuously, and it is not convenient to work on different types of columns. In order to make the disassembly machine fully function to reduce labor intensity and increase its applicable range, it is necessary to improve the original disassembly and assembly machine so that it can smoothly complete the disassembly and assembly work of various types of columns. 1 The structure of the original column disassembly machine The column disassembly machine is mainly composed of the power part control part and the disassembly and assembly platform. The structure of the structure is 1. 10. Limiter 1. Reducer 12. Hydraulic motor 13. Base 4. Fuel tank 15. Oil pump 16. The motor here mainly analyzes the dotted frame portion of the disassembly table portion 1. The disassembly and assembly station is the execution part of the whole machine. It is mainly composed of hydraulic motor reducer disassembly and assembly chuck limiter column fixed plate jack and base. 2 Working principle When disassembling the column, first lift the column to be disassembled onto the roller of the base, then start the motor to drive the oil pump, operate the control valve of the control jack to push the plunger out, and fix the plate to push the column to the left. At the same time, the reversing valve for controlling the hydraulic motor rotates the disassembly chuck in the direction of the unscrewing end cap. When the notch of the end cap of the column is engaged with the disassembly chuck, the column is restricted, and the rotating chuck is rotated. You can unscrew the cover. Finally, the hydraulic motor is stopped, so that the jack pulls the column back to complete the disassembly process. The assembly process is similar to the disassembly process and will not be described here. The movable jaws can be applied to the operation of different outer diameter columns, the operation is simple, the manufacturing process is low, and the material is saved. The choice of movable jaws is related to the size of the column end caps, ie to the outer diameter of the hydraulic column. The length of the heart is 3.1. It is suitable for the disassembly and assembly of the type column. Because the retainer of the original disassembly machine, the fixed column of the roller and the base are relatively fixed in the vertical direction, it can not adapt to the disassembly and assembly of different outer diameter columns. 3.2 When the end cap of the end cap is disassembled and disassembled, the disassembly chuck and the end cap are relatively stationary, and the column has both relative rotational motion and axial movement caused by the rotary motion. Since the column has been limited, its six degrees of freedom are limited, and the chuck has a degree of freedom other than the winding, and the other degrees of freedom are limited to 2, so the distance is not compensated, so that the end cover and the grain are damaged. In response to the above questions, the original disassembly machine was modified as follows. The roller is made into a part 3 so that it can be raised and lowered. After the improvement, it is called the lifter placed on the lifting frame. When lifting, manually replace the structure with a complicated mechanism. Since the hydraulic support column has been serialized, it is only necessary to make the height of the block to make the center high energy of the different types of columns and the center of the chuck. The diameter is the outer diameter of the column to be disassembled, and the degree of the spacer to be placed is the rolling replacement of the column fixing plate and the sliding frame sliding frame; the movable pin connection between the column fixing plate and the jack is used instead of the fixed connection. The column fixing pin fixes the tail earring hole instead of the side plate. When the column is disassembled, the jack is unloaded and combined with the sliding frame and the roller to compensate the pitch of the end cover crepe. The original disassembly machine uses different chucks for different columns, which not only replaces the troubles, but also wastes materials and is not economical to repair. Improved chuck 4. The chuck body is relatively fixed to the motor output shaft. Series 4 chucks fitted on the chuck 1. Lifting frame 2. Retainer 3. Peeling block 4. Supporting beam 5. Roller 5 Conclusion After the above improvements, the original hydraulic column disassembly machine throws some The complicated mechanized operation has basically solved the shortcomings. The improved disassembling machine is currently in good use, which reduces the labor intensity of the workers to a greater extent, improves labor efficiency, and improves the assembly qualification rate of the column and Use the safety factor. Received date 2000515 cyclone selection technology transformation Ding Shoucheng Lushan Mine North Corporation Science and Technology Department Anhui Yanzhou Mine The existing mining method is the filling mining method, the tailings for filling mainly originated from the cyclone classification. In order to achieve the underground civilized production and extend the service life of the tailings pond, it is required to be classified by the cyclone at 382 to enter the stope, so that the amount of coarse sand in the tailings reservoir is reduced. The original cast iron cyclone has undergone technical transformation due to the poor classification effect, non-wear resistance and frequent replacement of equipment parts, which seriously affect and restrict mine production. 1 Equipment operation status At present, our mine tailings transport sand pump is at +61 mark, which is transported through the apricot 200 steel pipe to be at +98, high. The coarse particles are graded by the cast iron cyclone to enter the underground stop filling, fine particle overflow. Natural accumulation in the tailings reservoir. The sand pump model is 2,8 Shijiazhuang water pump factory, 0=18,3 outside, good = 65 claws, the impeller diameter is 400, the ball mill processing capacity is 1000141.67, the tailings firefly accounts for 90, the tailings specific gravity 3.0 pulp concentration is 1720, the slurry is measured. , 12,13 sand pump motor power 751, motor speed 1480, sand pump actual delivery 3 plus, the actual transport distance 328, 2 equipment selection and technical transformation program to determine the original equipment wear is more serious and the classification effect is not good Through investigation and research, we decided to solve this technical difficulty with a new polyurethane hydrocyclone. The main factors affecting the performance of the hydrocyclone are the structural parameters of the feed pressure and the feed concentration. Hydrocyclones have different diameters and grades of 1. 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