The portable small air compressor often adopts the structure type of the direct drive of the motor, that is, the crankshaft is directly connected to the rotor shaft of the motor, and the cooling of the motor and the cylinder head mainly relies on forced air cooling. Under normal circumstances, the layout of the compressor cooling system has two forms: one solution is to arrange the cooling fan at the tail end of the rotor shaft of the motor, and the wind generated by the cover is guided by a cover member, etc. The outer surface of the stator is then blown to the cylinder head of the compressor; another solution is to arrange the cooling fan in the crankcase and connect with the crank pin, and the cooling air generated by the fan is directly blown to the piston, the cylinder and the cylinder head, The solution is only available for oil-free lubrication air compressors. The layout of the above-mentioned cooling system has become a classic. In the current small air compressors, especially portable oil-free lubricating compressors, the fund project has been obtained: the extensive application of Jiangmen City Science and Technology Project t Jiangcai P9217J. In the process of the compressor, the fan is arranged at the end of the motor because the internal air intake noise is used in the crankcase. As a result, it is found that the main bearing temperature of the compressor is slightly higher, which affects the operation of the compressor. reliability. After analysis, it is confirmed that the main reason for the increase of the temperature of the main bearing is that after the crankcase is closed into the intake anechoic chamber, the cooling environment of the casing becomes bad, so that the heat generated by the motor is transmitted through the casing and the rotor shaft and the like. It gathers around the hole of the bearing housing and is difficult to disperse. In view of this, the author improved the layout of the original cooling system, allowing a part of the cooling air to cross between the sweeping motor and the box. It has been proved that this measure can reduce the temperature of the bearing housing bore and ensure the reliable operation of the main bearing. Sex. 2 The layout of the traditional compressor cooling system is given by the most representative small oil-free auxiliary machine. The layout of the sliding air press. The crankcase is in an open layout configuration, and the cooling fan is routed straight to the crankshaft, such as the end, which is eccentrically attached to the crank pin to ensure that the axis of rotation of the fan is coaxial with the rotor axis of the motor. Since the cooling fan is close to the active base, the cylinder and the cylinder head, the cooling effect of the above components is very good, and the reliability of the connecting rod bearing and the sealing cup is greatly beneficial. In addition, the open crankcase structure also makes the main bearing mounted on it less temperature rise. 1. Piston 2. Connecting rod 3. Fan 4. Crank pin 5. Shell 6. Main bearing 7. Tailstock 8. Motor shaft 9. Curved box 丨 0 cylinder 丨丨. The layout of the typical oil-free lubrication air compressor of the head 丨 2 valve seat indicates the layout of the new compressor cooling system. In order to meet the market demand, the author has developed a low-noise oil-free lubrication air compressor (see), which is characterized by the crankcase seal Enclosed to form the air intake anechoic chamber of the compressor, the intake air noise is greatly reduced by the huge space of the crankcase, as shown in ~3 (see the serial number description). The improved cooling system is constructed as follows: 1 The main air duct is formed by a plastic cover member, and the cold I. fan disposed at the rear end of the motor 2. The cover 3. The rotor 4. The stator 5. The air outlet 6. The main bearing 7. Crankcase 8. Crankshaft 9. Seat 丨 0. Cylinder head 丨丨. Air duct 丨 2 cylinders 13. Air inlet new crankcase air compressor air shaft diagram A. External air intake B. Main K road wind C. Cylinder head air D. Cross wind sweep F. Broadcasting wind However, the wind generated by the fan is directed to the cylinder head of the compressor, which is the main body of the cooling system, which inherits the layout of the conventional cooling system; (2) the air inlet and the outlet are opened on the side of the crankcase facing the motor, wherein The air inlet is connected to the main air duct, so that part of the cooling air enters, crosses and sweeps between the motor and the crankcase, thereby cooling the bearing housing hole and the surrounding box wall surface, which is an improvement of the conventional cooling system. expansion. It is a physical photograph of the crankcase of the low-noise oil-free lubricating air compressor developed by the author. The air inlet and outlet on the crankcase and the muffling expansion chamber on the crankcase can be clearly seen. It has been proved by experiments that the noise of the new compressor can be reduced by 5~6dB(A) compared with the traditional oil-free air compressor of the same specification; the temperature at the crankcase housing hole can be reduced compared with the scheme without the cross cooling air. Approximately 4, the main bearing's operating temperature is less than 80, thus ensuring the operational reliability of the bearing. 4 Conclusion temperature on the portable oil-free lubrication of the air compressor bearing work (down to page 68) preparation quality management vulnerability parts map complete; (W lubricants periodic analysis records, periodic state monitoring records, maintenance records and other equipment files complete The daily maintenance of the 0 compressor is carried out in accordance with the equipment instructions provided by the manufacturer. 4.7 All management systems are sound, measures are in place. Ca) The natural gas compressor body and all kinds of equipment are complete and complete, and all kinds of maintenance and overhaul records are carefully filled out; (B staff are trained and certified to work (pressure vessel operation) According to the post standard operating procedures, the compressor can be used to perform on-site monitoring of natural gas compressor maintenance; W compressor establishes regular leak detection, fastening anchor bolts, lightning protection grounding detection, flammable gas alarm calibration, Compressor with pressure vessel periodic inspection, vibration detection, compressor chain alarm shutdown, safety accessories periodic calibration, oil product inspection, video monitoring, maintenance system, measures are in place; (d) maintenance unit qualification capabilities, complete procedures, Sign the safety contract and maintenance agreement, and the maintenance contract is in place; Ce) formulate the specific maintenance personnel management system, and pass the safety training and business skill examination; the new compressor is put into operation, the nitrogen replacement should be carried out, and the tested oxygen concentration is lower than 2%, can be adjusted for air intake; (Dad develops the annual compressor training according to the needs of employees at different levels Training plan, carry out training according to plan; (h) Establish management system for outsiders and maintenance personnel, all employees entering the booster station have full labor insurance and wear soundproof earmuffs; C is connected to page 57) The new compressor crankcase has a solid photo Sex has a greater impact, especially for oil-free lubrication air compressors with crankcase air intake, the main bearing mounted on the crankcase has a higher operating temperature, which is necessary for cooling and heat dissipation. Mandatory diversion of a cooling wind into (i) emergency fire equipment configuration in place, regular inspection, the fire station of the treatment plant is unblocked, the emergency door is intact, the emergency storage materials are adequately stocked, and the fire brigade of the nearest processing plant is on standby at any time; The ventilation fan, window and other ventilation facilities are intact, the video surveillance camera can cover every compressor of the booster station, and the central control room DCS operation platform can realize the remote shutdown of the compressor; the risk identification of the booster station is carried out, and the detailed natural gas compressor room fire is formulated. , contingency plans for explosions, and regular drills. 5 Conclusion During the leaping development of the Sulige gas field, the natural gas treatment plant is the core of the entire Sulige gas field. Therefore, it is necessary to strengthen the safety management of natural gas compressors in the treatment plant to ensure the normal operation of key core equipment, and to ensure the safe production of the Sulige gas field. The important link is to achieve a harmonious and stable development goal only by ensuring a healthy and safe environment. Boiler Tube And Heat Exchange Tube Heat Exchange Tube,Boiler Tube,A210 Boiler Tube Hydrogrand Steel Pipe Co.,ltd , https://www.hydrograndtube.com
Discussion on the layout of portable oil-free lubricating air compressor cooling system