Roots Vacuum Pump Rotor Positioning and Locking Mechanism

Abstract

The invention relates to a rotor positioning lock mechanism of a roots vacuum pump. The rotor positioning lock mechanism comprises a gear, a clamping cap and a rotor shaft for driving a driving rotor and / or a driven rotor to rotate, and the gear is sleeved on the rotor shaft; and the clamping cap suppresses the rotor shaft, is assembled with the gear in a pin hole by a locating pin, and is fixedly connected. The rotor positioning lock mechanism of provided by invention has the advantages that the rotor and the gear of the roots vacuum pump are exactly positioned, the locking is reliable, and the processed difficulty of the rotor and the gear is reduced.

Description

technical field [0001] The invention belongs to the technical field of product structures, and relates to a locking mechanism, in particular to a rotor positioning and locking mechanism of a Roots vacuum pump. Background technique [0002] The rotors of the Roots vacuum pump are generally driven by a pair of synchronous gears. The driving rotor and the driven rotor have a certain angular position relationship with the two gears. In order to ensure the correct meshing of the pair of rotors during work, the positioning of the gear and the rotor Locking is very important. If the positioning is not accurate, the active rotor and the driven rotor will interfere when they rotate, resulting in high noise, jamming and other faults. In order to locate and lock the rotor and the gear, the following methods are commonly used at present: the two rotors (the driving rotor and the driven rotor) are respectively connected to the driving and driven gears through keys for transmission; the ...

AI Technical Summary

Problems solved by technology

[0003] There are certain deficiencies in the positioning and locking methods of the rotor and gear of the Roots vacuum pump currently used: although the key connection can be used to achieve reliable positioning, the position accuracy requirements for the rotor profile and keyway, gear tooth profile and keyway It is very high, which makes processing difficult; the method of connecting the rotor and the gear with screws also has high requirements on the position of the rotor profile and the threaded hole (hole), the gear tooth shape and the hole (threaded hole), and the problem of difficult processing. If the gap between the hole and the screw is increased to reduce the difficulty of processing and adjusted during assembly, the screw will loosen during work, and the rotor will be angularly offset from the gear under the action of the reverse torque, which will cause the rotor to be stuck. ; Although the method of using inner and outer tapered surfaces and screw compression reduces the difficulty of processing, it only needs to be locked with screws after adjusting the angle during assembly, but this way of friction transmission also has unreliable locking, and the rotor Under the action of the reverse torque, the angular deviation occurs with the gear, which in turn causes the problem of the rotor being stuck.

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