CN201730826U

CN201730826U - Axial double-action type liquid-ring vacuum pump

Info

Publication number: CN201730826U
Application number: CN2009202241238U
Authority: CN
Inventors: 郜璋顺
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-09-30
Filing date: 2009-09-30
Publication date: 2011-02-02
Anticipated expiration: 2019-09-30

Abstract

The utility model relates to an axial double-action type liquid-ring vacuum pump, which belongs to the industry of mechanically manufactured vacuum pumps, is used for sucking and compressing air, and is widely applied to industrial and civil agencies such as light industry, chemical engineering, power generation, metallurgy, pharmacy, food and the like. Suction and exhaust openings of the existing double-action type liquid-ring vacuum pump are located at the inner diameter of a hub of an impeller of the pump, and an air flow passage has narrow cross section and more turns, so that air inflow and outflow quantities are limited, manufacturing difficulty and cost are increased, and strength of vanes of the impeller is affected greatly. A pump casing of the axial double-action type liquid-ring vacuum pump is only required to be axially designed into an oblate pump casing, then a side cover is fixed on the pump casing so that suction and exhaust openings on the side cover respectively correspond to suction and exhaust cavities axially, and suction and exhaust pipes can be directly used for sucking and exhausting air when mounted on the side cover. In addition, the axial double-action type liquid-ring vacuum pump has the advantages of simple structure, easy manufacturing, high work efficiency, long service life and the like.

Description

Axial double action liquid-ring vacuum pump

Technical field:

The utility model belongs to the vacuum pump class industry of machine-building, its purposes is suction and pressurized air, make the aspirating air pipe system produce negative pressure, make exhaust pipe system produce malleation, be widely used in industry and civilian departments such as light industry, chemical industry, generating, metallurgy, pharmacy, food.

Background technique:

The suction of existing double action liquid-ring vacuum pump, relief opening are positioned at the wheel hub inner radius of its impeller, this structural type has three shortcomings: the one, inhale, relief opening is in the central authorities of whole vacuum pump body, and with the supporting suction of vacuum pump, the exhaust pipe system periphery at vacuum pump, want to realize the connection of the two, must in the pump housing, design special runner, this becomes very complicated with regard to the Organizational Structure that makes the pump housing, has increased difficulty and the cost made; The 2nd, the wheel hub internal diameter surface area of impeller itself is just very narrow, suction here is set, row's suction inlet certainly will make into and out of tolerance and is very limited, therefore, in order to add atm number, just have to strengthen the axial length of impeller, cause the length of whole vacuum pump body to be difficult to shorten, the manufactured materials expense also just is difficult to reduction; The 3rd, want to make air communication to cross the wheel hub of impeller, the wheel hub annulus just must remove, this just makes the blade of impeller lose dependence towards axis direction, have to just can remedy the blade strength deficiency by impeller side or other reinforcement measure, and this causes the manufacture difficulty of impeller and cost significantly to increase again.

Summary of the invention:

Existing double action liquid-ring vacuum pump is radially inhaled in order to overcome, the caused structural imperfection of exhaust, alleviate and reduce the manufacture difficulty and the cost of pump housing associated components, and then for enlarging markedly, and effectively prolong the working life of impeller into and out of the tolerance runner that facilitates.The technological scheme that the utility model is taked is: by pump case, pump shaft, impeller and side cover are formed vacuum pump body, the axial shape of pump case is for being centrosymmetric oblate with pump shaft, the minor axis of pump case inwall is slightly larger than impeller diameter, charge into certain amount of fluid in the pump case, the shaft hole sleeve of impeller hub is loaded on the pump shaft, when pump shaft impeller blade rotates, must order about liquid and be similar to oval-shaped pendular ring in oblate pump case inwall formation, the size of oval pendular ring and shape are by oblate inner wall limit, and be subjected to what the control of wheel speed speed and fluid flow, the minor axis length of the oval pendular ring that making runs well afterwards forms is slightly less than the hub diameter of impeller, and major axis is slightly less than the blade diameter of impeller.So, must form suction, the exhaust cavity of two crescent shapeds between the wheel hub of impeller outside and oval pendular ring, that is to say to form two respectively symmetrically in the air aspiration cavity and the exhaust cavity in axle center, the position of cavity is relatively stable.Simultaneously, in the end of impeller side cover need be installed and be fixed on the pump case, two intakepories and two relief openings are set on the side cover, make two intakepories and two relief openings respectively axially corresponding to two air aspiration cavitys and two exhaust cavitys.The beneficial effects of the utility model are: because side cover is directly fixed on the pump case, assemble more convenient, intakeport on the side cover and relief opening are directly axially corresponding to air aspiration cavity and exhaust cavity, the cross-section area of air-flow path is big, it is few to turn, and increases into and out of tolerance, and suction, outlet pipe directly are installed on the side cover, manufacture difficulty alleviates greatly, and materials consumption obviously reduces; And when impeller rotated, the suffered torque of impeller blade was the axle center symmetry properties, and this is of great advantage working life for improving impeller operation stability and prolonging impeller.

Description of drawings:

Illustrated with reference to the accompanying drawings that below Fig. 1 is the assembly structure sketch of axial double action liquid-ring vacuum pump critical piece, Fig. 2 is its axial theory structure sketch.Curve arrow is represented the pump shaft sense of rotation among the figure, 1-side cover, 2-intakeport, 3-relief opening, 4-axis hole, 5-blade, 6-wheel hub, 7-pendular ring, 8-air aspiration cavity, 9-exhaust cavity, 10-pump case.

Embodiment:

When manufacturing and designing, with the impeller is benchmark, make the minor axis of oblate pump case 10 inwalls be slightly larger than impeller diameter, in pump case 10, charge into certain amount of fluid then, allowing pump shaft pierce into axis hole 4 impeller rotates with rated speed, after being similar to oval-shaped pendular ring 7 formation, design the major axis of oblate inwall again, the oval pendular ring minor axis length that makes its size and shape be limited is slightly less than wheel hub 6 diameters of impeller, major axis is slightly less than blade 5 diameters of impeller, in addition, two intakepories 2 and two relief openings 3 on the side cover 1 are distinguished axially corresponding to two air aspiration cavitys 8 and two exhaust cavitys 9, intermediate space is the smaller the better, inhales, outlet pipe then directly is installed on the side cover 1.When manipulating, make wheel speed stable, and make the interior fluid flow weighing apparatus of pump case fixed, the liquid measure that loses must in time be supplied, and the position of suction, exhaust cavity is kept relative stability always.After entering normal working, the aspirating air pipe system will produce negative pressure, and exhaust pipe system also can produce malleation.

Claims

1. axial double action liquid-ring vacuum pump, form vacuum pump body by pump case, pump shaft, impeller and side cover, it is characterized in that: the axial shape of pump case is for being centrosymmetric oblate with pump shaft, the minor axis of pump case inwall is slightly larger than impeller diameter, charge into certain amount of fluid in the pump case, the shaft hole sleeve of impeller hub is loaded on the pump shaft.

2. axial double action liquid-ring vacuum pump according to claim 1, it is characterized in that: in the end of impeller side cover need be installed and be fixed on the pump case, two intakepories and two relief openings are set on the side cover, make two intakepories and two relief openings respectively axially corresponding to two air aspiration cavitys and two exhaust cavitys.