Three-screw labyrinth seal cutting liquid pump

Abstract

The invention discloses a three-screw labyrinth seal cutting liquid pump. The three-screw labyrinth seal cutting liquid pump comprises end covers at two ends, and a shell in middle; one of the end covers at two ends is a general flange end cover connected with a motor, and the other one is a radial oil sucking end cover far from the motor; and a rotating shaft is axially distributed in the centerof the shell. The three-screw labyrinth seal cutting liquid pump is characterized in that cutting liquid consists of 95% of water and 5% of oil; the rotating shaft axially distributed in the center ofthe shell is a profiled three-screw rotor; a lengthened labyrinth seal groove is arranged on a driving screw of the profiled three-screw rotor; and a labyrinth seal flange end cover matched with thelengthened labyrinth seal groove is arranged between the general flange end cover and the shell. Through change of the position of the labyrinth seal groove, increment of the length of the labyrinth seal groove, rust resisting and wear resisting treatment of a three-screw material, organic combination and mutual dependence of the three, the difficulty of incapability of further improving the capacity efficiency of the cutting liquid pump for a long time is solved; the capacity efficiency of the cutting liquid pump is improved from 40%-50% to 70%; and the three-screw labyrinth seal cutting liquid pump creates the history at home and abroad, and fills the blank at home and abroad.

Description

technical field [0001] The invention belongs to the technical field of cutting fluid pumps, in particular to a three-screw labyrinth-sealed cutting fluid pump. Background technique [0002] At present, the cutting fluid pumps widely used in the industrial field are mainly divided into two types. One is the vane centrifugal pump used by most people. The core working part of the vane pump is not the rotor but the impeller. The impeller in the vane pump is set open. There is no closure, so the volumetric efficiency is generally low. When the volumetric efficiency is high, it can only reach about 60%, generally only 40-50%, and the working speed is high, and it cannot work at low speed. This kind of vane pump is generally called As a speed type pump, it is necessary to convert the mechanical energy of the impeller into the kinetic energy of the fluid at a high speed, so as to realize the function of conveying the fluid. Another type of cutting fluid pump is the screw pump, whic...

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Problems solved by technology

[0004] Aiming at the deficiencies in the prior art, the present invention proposes a three-screw labyrinth-sealed cutting fluid pump. The problem of low volumetric efficiency

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