The construction principle of hermetic compressor:

A hermetic compressor, comprising: an electric motor part, a mechanical part driven by the electric motor part, a sealed container for accommodating the electric motor part and the mechanical part, the mechanical part comprising: a cylinder, a piston reciprocating in the cylinder, and arranged on the end surface of the cylinder And the valve plate with the suction hole, one end is actually directly connected with the suction hole, and the other end is set in the suction channel of the inner space of the sealed container, and the motor is driven by the frequency conversion mechanism that operates at two or more signal frequencies. The invention can provide a hermetic compressor with low noise and high refrigeration capacity.

The construction principle of the sliding vane compressor:

The sliding vane compressor uses the simple centrifugal motion principle of the sliding vane, and is mainly composed of a cylinder, a rotor and a cylinder head. When the rotor rotates at a high speed, the sliding vane is under the action of centrifugal force, and the rotor is eccentrically arranged in the cylinder. A number of radial grooves are installed in the grooves, which are provided with sliding vanes that slide freely along the radial direction, and the inner wall of the cylinder and the outer surface of the rotor form a crescent-shaped space. When the rotor rotates, the sliding vane is thrown out of the groove by the centrifugal force, and sticks closely to the inner wall of the cylinder. Together with the cylinder and the rotor, a periodically changing base circle volume is formed, and the compressed gas is discharged without pulse.

The working principle of the piston compressor:

When the crankshaft rotates, the piston will reciprocate through the transmission of the connecting rod, and the working volume formed by 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 gradually increases. At this time, the gas pushes the intake valve along the intake pipe and enters the cylinder until the working volume reaches the maximum, and the intake valve closes. ; When the piston moves in the opposite direction, the working volume in the cylinder is reduced and the gas pressure is increased. 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. Gas valve closed. When the piston moves in the opposite direction again, the above process repeats. In short, the crankshaft rotates once, the piston reciprocates once, and the process of intake, compression and exhaust in the cylinder is successively realized, that is, a working cycle is completed.

The working principle of the air conditioner compressor:

When the rotor shaft 2 of the compressor is driven to rotate by the main shaft of the engine, due to the action of centrifugal force and oil pressure, the blades 3 slide along the grooves on the shaft. Because the cylinder block 1 is elliptical, when the shaft of the compressor rotates, the crescent-shaped cavity composed of the cylinder block 1, the rotor shaft 2, and the blades 3 will continue to expand, shrink, expand, and shrink cyclically, so as to achieve The suction, compression and exhaust functions of the compressor. The rotary vane compressor has a compact structure, and its volume and weight are only half of those of the swash plate compressor of the same specification, with small torque change, good starting performance, material saving and energy saving, and high reliability; R134a

  Air compressor

The structure principle of screw compressor:

The working cycle can be divided into three processes: suction, compression and exhaust. As the rotor rotates, each pair of intermeshing teeth sequentially completes the same work cycle.

Inhalation process compression and fuel injection process exhaust process

1) Inhalation process: when the rotor rotates, the cogging space of the main and auxiliary rotors is the largest when it turns to the opening of the inlet end wall. That is, it is sucked into the closed cavity composed of the yin and yang rotor and the shell. When the air fills the entire tooth groove, the intake end 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: As the rotor rotates, the inter-tooth volume decreases continuously due to the meshing of the rotor teeth. The volume occupied by the gas enclosed in the interdental volume is also reduced, resulting in an increase in pressure, thereby enabling the gas compression process. The compression process may continue until just before the interdental volume communicates with the exhaust port.

3) Exhaust process: When the closed volume between the teeth is connected with the exhaust port, the compressed gas starts to be exhausted. With the continuous reduction of the interdental volume, the compressed gas is completely discharged.

The structure of the gas compressor

According to different exhaust pressures, compressors can be divided into low pressure compressors - exhaust pressure less than 1.0MPa; medium pressure compressors - exhaust pressure 1.0-10MPa; high pressure compressors - exhaust pressure 10-100MPa; ultra-high pressure compressors - exhaust pressure The air pressure is greater than 100MPa and so on. The low-pressure compressor is single-stage, and the medium-pressure, high-pressure and ultra-high-pressure compressors are multi-stage, and the maximum number of compressors can reach 8. At present, ultra-high pressure compressors for polyethylene with a pressure of 343MPa have been produced abroad. According to the different compression media, general compressors can also be called: air compressors, oxygen compressors, nitrogen compressors, hydrogen compressors and so on.

Among hydrocarbon gases, 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.; natural gas The main component is methane. Hydrocarbon gases can be produced and pressure fed as a single component gas or as a mixed component gas. In a gas compressor, the composition and properties of the compressed medium will be closely related to the lubrication method and the selection of lubricating materials.

The structure principle of lubricating compressor

ZW (3～10m3) series oil-free lubricating compressors are vertical double-cylinder water-cooled piston type compressors with no oil-filled lubrication in the working cylinders, single-acting or double-acting two-stage compression working type compressors. It is composed of compressor main engine, intercooler, intermediate separator, after cooler, after separator, air storage tank and control system, and is directly driven by electric motor. This series of compressors are widely used in chemical, petroleum, medicine, food, textile, environmental protection, power station, electronic components and instrument manufacturing, scientific research and other departments to transport pure gas or as equipment to automatically control the gas source.

The structure principle of natural gas compressor

Compressors used in natural gas filling stations mainly include motors, crankshaft connecting rod mechanisms, cylinders, and pistons. The number of compression stages of the gas is three or four, and the number of rows composed of connecting rods, cylinders and pistons is two rows. There is no balance section cylinder between the cylinders of different stages in the same row, and an inverse differential combination structure is used. The cylinder packing and piston rings 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 running stability of the compressor, reduces the energy consumption, and can obtain compressed natural gas without oil pollution.

The working principle of the scroll compressor

The scroll air compressor is formed by the dynamic and static scrolls of the function equation line. In the process of suction, compression and exhaust, the stationary scroll is fixed on the frame, the moving disk is driven by the eccentric shaft and controlled by the anti-rotation mechanism, and rotates in a plane with a small radius around the center of the base circle of the stationary disk. The gas is sucked into the periphery of the static disc through the air filter core. With the rotation of the eccentric shaft, the gas is gradually compressed in several pairs of crescent-shaped compression chambers formed by the teeth of the dynamic and static discs, and then continuously discharged from the axial holes of the static disc.