Car mobile compressed air station improvement

1fae=ingLiU Abstract: In view of the shortcomings in the use of the power transmission system, the concentrator cooling separation system, the dry filter system structure and the car compartment, the corresponding improved hunting is proposed. Keywords: quality; improvement; mobile compressed air station, system CLC number: [1457 fifth gear as the output force of the compressor when working.

2.2 Compressor Cooling and Separating System The cooling system of the original compressed air station compressor is a mixed cooling system consisting of air cooling and water cooling. It has not only complicated structure, poor cooling effect, but also poor environmental adaptability. After the improvement, the original water-cooling part was eliminated, and the cooling technology was designed using the cooling technology of the full-air-cooled compressor of the German Sauer & Sons. Each stage of the cooler adopts air-cooled tube fin-type high-efficiency cooler. The 1~11 cooling tube of the compressor is designed with heat-dissipating fins inside and outside the tube. The stage cooling tube is only equipped with heat dissipation outside the tube due to the small diameter. Fin. At the same time, using the speed of two fans 1600"/1 of the diameter of 011, the compressor of each stage of the compressor and the cooler of the compressed air are blown and cooled, and the temperature of the lubricating oil of the compressor is not greater than the tearing: The exhaust temperature of the air is not higher than the ambient temperature 101:.

The oil-water separation system of the original compressed air station compressor has only one separator with a volume of 4L cylinders in each of the W stages. The oil-water separation effect is poor, and the quality of the compressed air is not easy to guarantee. After the improvement, the 11-stage oil-water separator was added to improve the separation effect between the compressor stages. The W-class oil-water separator was also changed from the 4L gas cylinder to the 18.5L gas cylinder, which improved the final separation effect and greatly reduced the effect. The free state oil water contained in the compressed air sent to the dry filtration system.

2.3 Dry filter system The adsorbent of the original compressed air station drying device is lead glue, which has weak adsorption capacity at high temperature; the heating tube of the heater is wrapped around the exhaust pipe of the automobile engine, and the heating temperature of the lead glue is not enough. The regeneration effect is poor; the filtering precision of the buckskin filter installed on the gas pipeline is not high. After the improvement, the adsorbent of the drying device is changed from lead rubber to molecular sieve, the heating tube of the heater is wound in the exhaust pipe of the automobile, and the deer skin filter is completely replaced with the ultra-fine glass fiber filter filter. In this way, the adsorption capacity and regenerative capacity of the drying device are greatly improved, and the filtration precision of the compressed air is also improved, and the quality of the compressed air supplied by the date of the draft: 2002 1017 is ensured.

1 Problem The propulsion of a certain type of vehicle-mounted mobile air station is based on the driving force of the compressor. Many quality problems are exposed during use, such as large vehicle vibration, air leakage and oil leakage, poor cooling separation effect, weak adsorption drying ability, power transmission system failure, inconvenient use and maintenance operation, and railway transportation level 2 overrun. Seriously affect the completion of their tasks. Therefore, it was decided to make technical improvements to this type of compressed air station, and the shaking needs to meet the needs of use.

2 Improvement measures The vehicle-mounted mobile compressed air station is improved, mainly for the problems exposed in its use, using new technologies and new processes developed by air compressors, and technical improvements are made from the following five aspects.

King 1 power transmission system The original compressed air station's power transmission system takes power from the car's gearbox, and the power take-off device is directly installed on the gearbox. When the working force of the power take-off compressor is large, it is easy to cause unreliable power conversion, leakage of lubricating oil, wear and tear of the fork, and other problems, and lead to leakage of the pipeline of the air station and loosening of the joint.

Through investigation and argumentation, it is decided to take the force from the transfer case of the car. After adopting the force-taking method, the force-taking device is transformed from the transfer case of the car, and the drive force is transmitted to the compressor by the universal drive shaft and the drive belt. A pneumatic power transmission conversion device is operated in the cab. This will not damage the overall structure of the car, and the generated vibration is small, the power transmission is stable and the king is reliable and easy to use.

Through the analysis of the external characteristic curve of the diesel engine of the type 1 diesel engine, the economical speed of the diesel engine is 15~1720 I/in as the output output speed, thereby selecting the reverse lubrication of the L-type compressor of the automobile transmission. Jin Hongchun, Xiong Ning, Yu Qiang Nanjing Cavity § Machine Co., Ltd., Nanjing 0121, Jiangsu, China. Reverse lubrication method is generally required to ensure the normal operation of the compressor. Lubricating oil is used to: lubricate, seal and prevent friction pair corrosion. The friction pair cleans and takes away the frictional heat. At present, the lubrication system of the crank-link mechanism of the reciprocating compressor is mainly a pressure lubrication system, and the direction of the pressure oil has a positive and a reverse lubrication manner.

The forward direction of the compressor transmission mechanism is: the oil oil crankshaft connecting rod cross pin pin body slide. The oil first goes to the crankshaft and finally to the fuselage slide.

The reverse direction of the lubricating oil of the compressor transmission mechanism is: the pressure oil body slide crosshead pin connecting rod crankshaft. The oil first goes to the fuselage slide and finally to the crankshaft.

2 Advantages of reverse lubrication At present, most of the reciprocating piston compressor transmission mechanisms are in the form of forward lubrication. In forward lubrication, the fuselage chute is the lowest pressure in the slip-slip system. It is often caused by the lack of oil and the lack of oil in the slide, causing the slide to be damaged and damaged. It is the place with the highest pressure in the lubrication system, ensuring that the transmission mechanism works normally and the wear is minimal; and the crankshaft does not need to drill the oil hole, avoiding the severe stress concentration caused by the oil hole and weakening the crankshaft strength. The method has high strength, good rigidity and easy processing. The reverse lubrication method combined with the full-floating large-diameter crosshead pin effectively reduces the specific pressure value, which not only facilitates reliable lubrication of the oil, but also reduces the wear of the transmission mechanism parts, and improves the reliability of the compressor.

Date of preparation: 2003 Wang 4 overall structure The compressor of the original compressed air station is installed on the frame of the automobile chassis, and the maintenance operation is extremely inconvenient; one cylinder of the cylinder bank is placed longitudinally along the carriage, occupying most of the area of ​​the carriage, making The air supply operating device is placed on the side of the compartment and is neither easy to operate nor safe. After the improvement, the overall structure of the gas supply vehicle was optimized. The frame of the compressor was designed as a whole flat plate structure, placed on the floor of the car, and one gas cylinder was placed in four layers horizontally. The gas supply operation device was close to The cylinder storage is arranged. Such a structural layout not only makes the appearance of the compressed air station be shaken, but also increases the working space of the person and facilitates the operation.

The car of the original compressed air station of the 5 car adopts the splicing structure, and the appearance quality is poor. When the railway is transported, the height is 2 levels exceeding the limit, which affects its normal use.

After the improvement, the car adopts the stamping and welding structure. There are three exhaust fans above the front end of the car. The top height is reduced from the original 3 27011 to 3070, and the side is reduced from the original 011 to 29701. This increases the compressed air. The aesthetic appearance of the station has solved the problem of the level 2 overrun limit during railway transportation.

3 Conclusion According to the provisions of the compressed air station product test program, the improved parts were tested in a targeted manner, through the appearance inspection of the product, hydraulic test, performance test productivity, noise, vibration, temperature, dew point, pressure reducing valve Tests, safety valve tests, liquid-gas separator tests, high-temperature environmental tests, running test runs, driving tests, etc., the results show that the performance parameters of the vehicle-mounted mobile compressed air station are all qualified, fully meet the requirements of product technical documents.

The product works reliably, the failure rate is low, the operation and maintenance are convenient, and the use needs are well satisfied.

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