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Special vertical lower cantilever hollow screw rod vacuum pump for pharmaceutical chemical engineering

A technology of hollow screw and vacuum pump, applied in the direction of rotary piston pump, rotary piston type/swing piston type pump combination for elastic fluid, components of pumping device for elastic fluid, etc., to eliminate screw clogging, solve Effects of Thermal Expansion Problems

Inactive Publication Date: 2016-06-01
HEBEI WEIPU VACUUM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] The purpose of the present invention is to provide a special vertical cantilever hollow screw vacuum pump for medicine and chemical industry, so as to overcome the deficiencies in the operation of existing screw vacuum pumps and meet the needs of use in the field of medicine and chemical industry

Method used

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  • Special vertical lower cantilever hollow screw rod vacuum pump for pharmaceutical chemical engineering
  • Special vertical lower cantilever hollow screw rod vacuum pump for pharmaceutical chemical engineering

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Embodiment Construction

[0035] like figure 1 , figure 2 As shown, the screw vacuum pump of the present invention includes a pump casing 11, an upper bearing housing 17, a lower bearing housing 18, a driving screw 9, a driven screw 10, a motor 16 and the like. The pump casing 11 is a box-shaped casing with an elliptical cross section, and the upper end of the side wall of the pump casing 11 is provided with an air inlet 12 communicating with the side wall of the pump chamber ( figure 2 ), at the bottom of the pump casing 11, there is an air outlet 13 communicating with the bottom surface of the pump chamber ( figure 2 ). The lower bearing housing 18 is an elliptical box with an oval section similar to the pump housing 11, and the upper bearing box 17 is provided with an overhang ( figure 2 ), a motor 16 is connected to the top of the overhang, and a gear transmission mechanism is connected inside the overhang.

[0036] In the present invention, the lower bearing housing 18 is moved up, and is ...

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Abstract

The invention relates to a special vertical lower cantilever hollow screw rod vacuum pump for pharmaceutical chemical engineering. The screw rod vacuum pump comprises a pump shell, an upper bearing box, a lower bearing box, a driving screw rod, a driven screw rod and a motor; the lower bearing box is arranged between the pump shell and the upper bearing box; spiral rotors of the driving screw rod and the driven screw rod are vertically arranged in a pump cavity side by side; shaft rods of the driving screw rod and the driven screw rod penetrate in a cavity formed by closing the lower bearing box and the upper bearing box up and down; synchronous gears engaged with each other are respectively mounted on the shaft rods of the driving screw rod and the driven screw rod; a gear transmission mechanism is arranged in the upper bearing box; a motor is mounted on the upper bearing box; and the gear transmission mechanism is respectively engaged with a driving gear on a main shaft of the motor and the synchronous gear on the driving screw rod. The screw rod vacuum pump realizes support of a lower cantilever structure by single end of screw rods, and enables a working airflow direction to be consistent with a gravity direction, so that such impurities as dust entering the pump cavity are easy to be discharged from an exhaust port in the lower part of the pump shell along with suction of working airflow of the vacuum pump, the blockage is eliminated, and the cleaning of the pump cavity is convenient.

Description

technical field [0001] The invention relates to a screw vacuum pump, in particular to a vertical lower cantilever hollow screw vacuum pump specially used for medicine and chemical industry. Background technique [0002] The main structure of the screw vacuum pump is that a pair of screws with opposite rotation are arranged in the pump casing, one is the driving screw and the other is the driven screw. The gear is connected with the driven screw, and it rotates synchronously and at high speed in reverse in the pump casing, thereby generating the suction and discharge force of suction vacuum. The screw vacuum pump is a non-contact dry pump. There is no friction between the driving screw and the driven screw, and between the screw and the pump body, and a certain gap is maintained. In order to achieve a small ultimate pressure and increase the suction speed, the above gap is generally The design is 0.05mm ~ 0.4mm. Most of the existing screw vacuum pumps are provided with supp...

Claims

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Application Information

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IPC IPC(8): F04C18/16F04C23/02F04C25/02F04C29/00F04C29/04F04C29/12
CPCF04C18/16F04C23/02F04C25/02F04C29/00F04C29/0092F04C29/042F04C29/12F04C2240/20F04C2240/30F04C2270/19F04C2270/20
Inventor 刘学军张彦学韩建军
Owner HEBEI WEIPU VACUUM EQUIP CO LTD
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