Description of main structure of air compressor
1. Compression mechanism: cylinder, piston, intake and exhaust valve and other components. There are four air valve holes on the cylinder block and cylinder head
2. Transmission mechanism part: composed of belt pulley, crankshaft, connecting rod, cross head, etc. Through the transmission mechanism, the rotary motion transmitted by the motor becomes a reciprocating linear motion.
3. Sealing part: the primary and secondary cylinder seals are composed of a group of packings. The sealing ring and piston rod are clamped and sealed by the pretension of the tension spring and the gas pressure.
4. Lubrication system system: The lubrication system of the transmission mechanism is composed of oil pump, filter, oil filter and pressure gauge.
5. Cooling part: It consists of cooling water pipe, intercooler and aftercooler. The cooling water enters the intercooler for cooling from the main water inlet pipe, and after being discharged, the cooling water enters the water chambers of the first and second stage cylinders, respectively.
6. Pressure reducing valve and pressure control system: The pressure reducing valve and pressure control system control the compressor discharge pressure to operate within a predetermined operating range. When the pressure in the storage tank exceeds the specified value, the compressor stops suction and makes the compressor run without load to reduce power consumption. When the load-relief valve is balanced, the intake or stop of the intake is controlled by the opening and closing of the valve. There is a small piston in the lower part. The small piston cavity is connected to the solenoid valve and the excessively considered pressure relief valve. The small piston chamber is at atmospheric pressure. When the pressure of the gas storage tank exceeds the rated value, the pressure control system operates (intake connection of the solenoid valve), the gas enters the small piston cavity, pushes the piston to press the spring, close the valve, and stops the air intake and the pressure control system after the pressure drops. Unified operation (the inlet of the solenoid valve is disconnected), the pressure relief valve opens automatically, and the compressor enters normal operation.
7.Safety protection part: composed of safety valve and electrical protection respectively. When the discharge pressure exceeds the specified value, the safety valve opens automatically. The safety valve is divided into first-level or second-level safety valve, and the opening pressure of the first-level safety valve is 0.24~0.3Mpa. Air compressor noise control
Mainly use three aspects of muffler, muffler tunnel and sound insulation technology
Install the muffler. The main noise source is the intake and exhaust ports, and suitable intake and exhaust mufflers should be selected. The frequency spectrum of the intake noise of the air compressor has a low-frequency characteristic, and the intake muffler should use a resistant structure or an impedance composite structure with individual resistance. The air pressure of the air compressor is large and the air flow speed is high. A small hole muffler should be used at the air compressor exhaust.
Set up silencing tunnels. Underground or semi-underground tunnels of muffler tunnels, the tunnel walls are made of bricks with good sound absorption. Connect the air intake pipe of the air compressor to the muffler tunnel, so that the air enters the air compressor through the muffler tunnel. The use of muffler tunnels can greatly reduce the air intake noise of the air compressor, and the service life is longer than that of ordinary mufflers.
Sound insulation technology is to establish sound insulation cover. After installing mufflers or mufflers in the inlet and exhaust ports of the air compressor, the airflow noise can be reduced to below 80db (a), but the mechanical noise and motor noise of the air compressor are still very high, so the air compressor should be Install sound insulation cover on the machine's unit.
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