Which is better, belt type or direct-coupled air compressor?

Belt-on-line belt conveyor means that the main machine and motor are connected through V-belt and pulley. The belt drive has the functions of transmitting power and changing the rotation speed. The rotation speed of the motor is fixed. Theoretically, the rotation speed of the main engine can be adjusted by adjusting the diameter ratio of the pulleys of the main engine and the motor, thereby increasing the exhaust volume of the main engine. Achieve the effect of cutting corners and cutting corners with a small host and large exhaust volume.
Belt transmission relies on friction to achieve power transmission, and it consumes a certain amount of electrical energy, accounting for about % of the transmission power, so it is not energy-saving.
The belt must have a certain tension to obtain sufficient friction. The tension of the belt will cause the bearings of the motor and the host to receive an additional radial force, accelerate the wear of the bearings, and reduce the life of the bearings. . Insufficient tension will cause friction and high temperature wear of the belt, so the belt tension must be adjusted regularly. When the belt is broken, it must be replaced in groups, not just parts.
Direct-connected machines, that is, the connection and power transmission between the host machine and the motor are realized through couplings.
Kaishan now uses an elastic coupling imported from Desi. There is an elastomer in the middle, which can buffer the slight coaxiality error between the motor output shaft and the host input shaft (yin and yang rotor). , compared with the belt conveyor, the transmission link of the direct-connected machine consumes almost no energy, so it saves energy. (For example, / is about % energy saving compared to /)
The design life of the elastomer is about 10%. Disassembly and assembly are extremely simple and convenient, just using a hexagonal wrench.
The remarkable feature of the direct-coupled machine is that the rotation speed of the male rotor of the main engine is the same as the speed of the motor. Therefore, compared with the belt conveyor, the rotation speed of the male rotor of the direct-coupled machine is lower, and the life and reliability are higher, because the bearings are not like those of the belt conveyor. The force and rotation speed are lower than those of the belt conveyor, so the service life of the bearings is longer, that is, the main engine has a longer life and is more reliable.
The host and motor of the pseudo direct-coupled machine are connected through a coupling, but there is a speed-increasing gear inside the host. The main feature is that the speed of the male rotor of the host and the motor are inconsistent. The speed of the male rotor of the host is much higher than that of the motor. Rotating speed.
Disadvantages: The power consumption of gear transmission is about %, which is not energy-saving. The male rotor rotates at high speed, which is not energy-saving. The main engine speed is high, the bearing life is short, the gear is poorly lubricated and easy to wear.
Screw plug machine
Due to its structure, the piston machine has a relatively high failure rate. Secondly, it is noisy and consumes power. Users must have dedicated personnel to maintain it. The labor cost of the piston machine is second to the cost of frequently purchased accessories. The workshop shutdown caused by frequent maintenance of the piston machine is the most troublesome problem for users.
The intake valve plate, cylinder piston and piston ring of the piston engine are wearing parts that are frequently replaced.
Due to its structure, the screw machine has no contact or friction between the two rotors. The whole machine has no wearing parts, so it can be left unattended and generally does not need to be moved for a year. In a word, the first thing customers consider when purchasing a screw machine is its stability and reliability, followed by its low noise and energy saving.