Double-head oil-free mute vacuum pump

Abstract

The invention relates to a vacuumizing device, in particular to a double-head oil-free mute vacuum pump. The double-head oil-free mute vacuum pump comprises a shell, a cylinder body, a piston component and an electromagnetic coil. The cylinder body, the piston component and the electromagnetic coil are arranged inside the shell in a sealed manner. The double-head oil-free mute vacuum pump is characterized in that the upper portions of the two ends of the shell are each provided with an air inlet, and a double-head guide pipe which is integrally formed is arranged inside the shell; the electromagnetic coil is connected to the outer sides of the two ends of the double-head guide pipe in a wound manner; and a barrier wall is arranged in the middle inside the double-head guide pipe. The double-head oil-free mute vacuum pump is simple in structure, and a mechanical power portion is greatly simplified so as to enable piston motion to be kept balanced; and the double-head oil-free mute vacuum pump is high in stability and working efficiency, long in service life and low in noise.

Description

technical field [0001] The invention relates to a vacuum pumping device, in particular to a double-head oil-free silent vacuum pump. Background technique [0002] Any machine that extracts gas from the equipment and makes the inside of the equipment reach a vacuum is called a vacuum pump. Vacuum pumps are widely used in plastic machinery, pesticide chemical industry, dye chemical industry, low temperature equipment, food machinery, electronics industry, metallurgy, printing, petroleum, mine foundation treatment, etc. Vacuum pumps can be roughly divided into: reciprocating vacuum pumps, rotary vacuum pumps and jet vacuum pumps according to different modes of movement. Among them, the reciprocating vacuum pump, also known as the piston vacuum pump, pumps air by periodically changing the working volume of the pump chamber (cylinder). [0003] The traditional piston-type oil-free vacuum pump is also composed of a cylinder, a piston assembly and an electromagnetic coil. The elec...

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Problems solved by technology

[0003] The traditional piston-type oil-free vacuum pump is also composed of a cylinder, a piston assembly and an electromagnetic coil. The electromagnetic coil is driven by a motor or the interaction of electromagnetic suction and spring force to drive the reciprocating motion of the piston in the cylinder; due to the sealing ring of the piston head in the piston assembly It is installed on the piston head, and the sealing ring of the piston head is easy to wear on one side, which makes the piston movement unbalanced, resulting in the scrapping of the piston; and because the power part of the electromagnetic coil is composed of more than two sets of coils, this makes the electromagnetic coil The mechanical power part is too complicated; in addition, the gas directly enters the cylinder without going through the electromagnetic coil part. Because the mechanical power part frequently works and directly pumps the atmosphere, it is often overheated and cannot be cooled immediately, which makes the service life of the machine short; if the motor is used to drive to drive the reciprocating motion of the piston in the cylinder to generate too much noise

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