Construction principle of closed compressor:
A closed compressor is composed of a motor part, a mechanical part driven by the motor part, and a sealed container containing the motor part and the mechanical part. The mechanical part includes a cylinder, a piston reciprocating in the cylinder, a valve plate arranged on the end face of the cylinder with a suction hole, a suction channel with one end actually connected with the suction hole, and the other end arranged in the space of the sealed container, The motor is driven by a frequency conversion mechanism that operates at more than 2 signal frequencies. The invention can provide a closed compressor with low noise and high refrigeration capacity.
Construction principle of sliding vane compressor:
Sliding vane compressor is mainly composed of cylinder, rotor and cylinder head by using simple sliding vane centrifugal movement principle. When the rotor rotates at high speed, the sliding vane is eccentrically arranged in the cylinder under the action of centrifugal force. There are several radial grooves on the rotor. The grooves are equipped with sliding vanes that slide freely along the radial direction. The inner wall of the cylinder and the outer surface of the rotor form a crescent shaped space. When the rotor rotates, the slide is thrown out of the slot by the centrifugal force, and is closely attached to the inner wall of the cylinder. Together with the cylinder and the rotor, it forms a periodically changing base volume, and discharges compressed gas without pulse.
Working principle of piston compressor:
When the crankshaft rotates, the piston will reciprocate through the transmission of the connecting rod, and the working volume composed of the inner wall of the cylinder, the cylinder head and the top surface of the piston will change periodically. When the piston starts to move from the cylinder head, the working volume in the cylinder increases gradually. At this time, the gas flows along the intake pipe, pushes open the intake valve and enters the cylinder until the working volume reaches the maximum, and the intake valve is closed; When the piston moves in the opposite direction, the working volume in the cylinder decreases and the gas pressure increases. When the pressure in the cylinder reaches and is slightly higher than the exhaust pressure, the exhaust valve opens and the gas is discharged from the cylinder until the piston moves to the limit position, and the exhaust valve closes. When the piston moves in the opposite direction again, the above process repeats. In a word, the crankshaft rotates once, the piston reciprocates once, and the process of air intake, compression and exhaust in the cylinder successively completes a working cycle.
Working principle of air conditioning compressor:
When the compressor rotor shaft 2 is driven to rotate by the engine main shaft, due to the centrifugal force and oil pressure, the blade 3 slides along the slot on the shaft. Because cylinder block 1 is elliptical, when the compressor shaft rotates, the crescent shaped cavity composed of cylinder block 1, rotor shaft 2 and blade 3 will continuously expand, shrink, expand and shrink, so as to realize the suction, compression and exhaust functions of the compressor. The rotary vane compressor has a compact structure, its volume and weight are only half of that of the swash plate compressor of the same specification, with small torque change, good starting performance, material saving and energy saving, and high reliability; Clean R134a is used as refrigerant
Air compressor
Structural principle of screw compressor:
The working cycle can be divided into three processes: suction, compression and exhaust. As the rotor rotates, each pair of teeth engaged with each other successively completes the same working cycle.
Suction process compression and injection process exhaust process
1) Aspiration process: when the rotor rotates, the tooth groove space of the main and auxiliary rotors is the largest when it turns to the inlet end wall opening. At this time, the tooth groove space of the rotor is connected with the free air at the air inlet, and the external air is sucked into the closed cavity composed of the male and female rotors and the shell. When the air fills the entire tooth groove, the air inlet face of the rotor turns away from the air inlet of the casing, and the air between the tooth grooves is closed.
2) Compression process: with the rotation of the rotor, the volume between the teeth decreases due to the meshing of the rotor teeth. The volume occupied by the gas enclosed in the volume between teeth also decreases, leading to the pressure rise, thus realizing the gas compression process. The compression process can continue until the volume between teeth is connected with the exhaust port.
3) Exhaust process: when the closed volume between teeth is connected with the exhaust port, the compressed gas starts to discharge. With the continuous reduction of the volume between teeth, the compressed gas is completely discharged.
Construction principle of gas compressor
Compressors can be divided into low pressure compressors according to different exhaust pressure - the exhaust pressure is less than 1.0MPa; Medium pressure compressor - discharge pressure 1.0-10MPa; High pressure compressor - discharge pressure 10-100MPa; Ultra high pressure compressor - discharge pressure is greater than 100MPa, etc. The low pressure compressor is single-stage, and the medium pressure, high pressure and ultra-high pressure compressors are multi-stage. The maximum number of compressors can reach 8. At present, the ultra-high pressure compressor for polyethylene with a pressure of 343MPa has been made abroad. According to the different compression media, general compressors can also be called: air compressor, oxygen compressor, nitrogen compressor, hydrogen compressor, etc.
In hydrocarbon gas, the main components of petroleum cracking gas and petroleum waste gas are hydrogen, methane, butane, ethylene, propylene, etc; The main components of coke oven gas and city gas are hydrogen, methane, carbon monoxide, carbon dioxide and nitrogen, etc; The main component of natural gas is methane. Hydrocarbon gas can be produced and compressed as single component gas, or as mixed component gas. In the gas compressor, the composition and properties of the compression medium will be closely related to the lubrication method and the selection of lubrication materials.
Construction principle of lubricating compressor
ZW (3 ～ 10m3) series oil-free lubrication compressor is a vertical double cylinder water-cooled piston type compressor with single or double action two-stage compression working type without oil lubrication in the working cylinder. It is composed of compressor host, intercooler, intermediate separator, after cooler, after separator, gas storage tank and control system, and is directly driven by motor. This series of compressors are widely used in chemical industry, petroleum, medicine, food, textile, environmental protection, power station, electronic components and instrument manufacturing, scientific research and other departments to transport pure gas or as automatic control gas source for equipment.
Structure principle of natural gas compressor
The components of compressor for natural gas filling station mainly include motor, crankshaft connecting rod mechanism, cylinder and piston. The compression stages of gas are three or four stages. The number of columns of connecting rod, cylinder and piston is two. The cylinders of different stages in the same column are not equipped with balance section cylinders, and the inverted differential combination structure is adopted. The cylinder packing and piston ring in each column are self-lubricating material rings. Compared with the compressor used in the existing natural gas filling station, it not only simplifies the structure, but also improves the stability of compressor operation, reduces energy consumption, and can obtain compressed natural gas without oil pollution.
Working principle of scroll compressor
The scroll air compressor is formed by the dynamic and static vortices of the function equation profile. In the process of suction, compression and exhaust, the static scroll plate is fixed on the rack. The moving plate is driven by an eccentric shaft and restricted by an anti rotation mechanism. It rotates in a plane with a very small radius around the center of the base circle of the static plate. Gas is sucked into the periphery of the static plate through the air filter element. As the eccentric shaft rotates, the gas is gradually compressed in several pairs of crescent shaped compression chambers formed by the teeth of the moving and stationary plates, and then continuously discharged from the axial holes in the static plate.