CN2108191U

CN2108191U - Slipper rotor variable displacement pump

Info

Publication number: CN2108191U
Application number: CN 91227998
Authority: CN
Inventors: 姜国旸
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-11-02
Filing date: 1991-11-02
Publication date: 1992-06-24

Abstract

The utility model relates to a slipper rotor variable displacement pump, relating to hydraulic fluid conveying variable displacement machinery. The utility model is composed of a pump body, a pump base, a pump cover, a main shaft, a rotor, a slipper, a reflowing device, a flow regulator, etc. The change of the eccentric distance between the slipper and the rotation center is realized by the flow regulator, and the volume of the outlet displacement is changed by regulating the slipper eccentric distance so that the goal of changing displacement is achieved. The utility model is also provided with a two-way reflowing device, and fluid conveyed by two ways is realized. The utility model has the advantages of wide application, simple structure, low manufacture cost, convenient maintenance, and no leakage. Running, bleeding, dripping and leaking phenomenon is reduced, and safety factor is improved.

Description

Slipper rotor variable displacement pump

The utility model relates to hydraulicdriven liquid and carries variable capacity machinery.

At chemical industry, medicine, in the medium transport pipeline of industries such as petrochemical industry, many occasions need have the pump kind that can two-way conveying can regulate flow again, and in the pump that the external model machine mapping of the existing several bases of China is made voluntarily, such-and-such defective is all arranged and the needs of different occasions can't be satisfied, as present most widely used interior circular-arc gear pump, its working principle is to utilize backlash to reach the purpose of transfusion by the engagement process of an interior circular tooth gear and external gear, but the pump noise is big like this, suction capacity is low, and do not have flow regulating function, can only be used for single traffic requirement occasion.And for example QZB spherical spinner pump is a kind of emerging pump, and its shortcoming is to make difficulty, reject rate height, also unadjustable flow.Also have a kind of steel ball stepless variable pump, be mainly used in the brush sander charging of coating industry, though its flow is adjustable, because the rotating speed height, quick abrasion easily leaks, and interchangeability is poor, and promoting at present has certain degree of difficulty.

The purpose of this utility model is to overcome the defective of prior art, provides that a kind of purposes is wide, easy to manufacture, cost is low, antileakaging positive-displacement pump with slider and rotor.

Embodiment of the present utility model is such: it is by the pump housing, pump seat, pump cover connection sealed to each other, power imports into through belt pulley, main shaft, main shaft and rotor are fixed, chute is arranged on the rotor, the slide block that departs from rotating center is arranged in the chute, the internal chamber wall of the pump housing has interchangeable snout cavity, outlet plenum and the back flash of symmetrical distribution, is provided with the bidirectional-reflux device of spring constant-pressure type in the groove, and the pump cover outside is provided with the flow regulator of adjusting slider throw of eccentric.

When motor power after belt pulley passes to main shaft with moment of torsion, the rotation of drive rotor, slide block is done rotation synchronously, because the wobbler action of slide block relatively moves with rotor rollaway nest formation, this moment, rotor cand be compared to oil cylinder, slide block cans be compared to piston, because the part of pump isolates, and liquid is pressed to outlet plenum from snout cavity, finishes the conveying of liquid.

Bidirectional-reflux device in the pump housing back flash, to adapt to the needs of two-way liquor charging, its setting is to prevent the too high damage that causes pump of liquor charging process middle outlet cavity pressure.When outlet pressure surpasses the spring minimum workload, reflux is opened, liquid just flows to snout cavity and reduces pressure from back flash, guarantee that the hydraulic coupling of outlet plenum remains on below the 0.6MPa, and the many height of backflow plunger pressure of another back flash can't be opened all.

The utility model is to utilize the throw of eccentric of adjusting slider to change the volume of pump inner outlet discharge capacity, thereby reach the purpose of variable, the measure that realizes change slide block throw of eccentric is to rely on flow regulator, manual tune changes the throw of eccentric of slide block and rotating center, thereby the stroke that changes slide block reaches the purpose of regulating flow.

Press the positive-displacement pump with slider and rotor of the utility model design, it utilizes the off-centre of rotor and slide block to reach the liquor charging purpose, because of having bidirectional-reflux device and flow regulator, can realize bidirectional transfusion, be used interchangeably into and out of the oral cavity, therefore of many uses, be applicable to the occasion that bidirectional transfusion and flow are adjustable, this pump structure is simple, easy to manufacture, long service life, noise is low, be difficult for leaking, easy to maintenance.If be applied on the brush sander charging liquor charging of coating industry, can save steel ball stepless speed adjusting gear or other stepless speed adjusting gear, thereby the trouble that has reduced cost widely and avoided repairing speed regulator, so have higher Economy and practicability, and can improve environmental hygiene, reduce " run, drip, leak " and improve factor of safety.

Description of drawings.

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is the A-A sectional view of Fig. 1.

Describe in further detail according to above-mentioned accompanying drawing embodiment below.

The pump housing (1) of positive-displacement pump with slider and rotor (seeing Fig. 1-2) is that static seal is connected with pump seat (5), the pump housing (1) with pump cover (8), and the internal chamber wall of the pump housing (1) has snout cavity symmetrical distribution, interchangeable (17), outlet plenum (18) and back flash (20).Main shaft (6) in the pump seat (5) carries out main shaft seal (3) by carbon packing, and gland (4) fixes.Main shaft (6) outer end be bearing on the bearing and with belt pulley (7) key connecting, the inner and rotor (2) key connecting, rotor (2) is bearing on the bearing, with main shaft (6) rotation, like this, as the not direct contact liq of the main shaft (6) of driving component, reduce the possibility of leaking, rotor (2) diameter is got 180mm, makes stepped and the pump housing (1) Spielpassung, has better seal simultaneously.Has chute (19) on the rotor (2), the slide block (9) that departs from rotating center is arranged in the groove, the width of slide block is related to sealing effect and working efficiency, too wide sealing effect is poor, too narrow efficient is low, so width, thickness are all got 70mm, slide block (9) is got 0～25mm with the throw of eccentric regulation range of rotor (2) rotating center.

Be provided with the reflux of spring constant-pressure type in the back flash (20) of the pump housing (1), it is made up of reflux spring (21) and backflow plunger (22), and backflow plunger (22) is being done the removable contact of sealing in back flash (20) under the effect of reflux spring (21).

Flow regulator is arranged in the adjustment seat (10) in pump cover (8) outside, the chamber that cover plate (13) constitutes, form by adjusting handle (16), nut (15), adjustable lever (14), regulating block (11), pin rod (12), pin rod (12) is fastenedly connected with slide block (9), and adjustable lever (14) is threaded with regulating block (11) T type.

Rotation hand wheel (16), adjustable lever (14) is only done rotation motion, and regulating block (11) is moved up and down, and drives pin rod (12) and slide block (9) and reaches the purpose of regulating throw of eccentric.

This pump external form interface size can be with reference to circular-arc gear pump in the NCB, and purpose is to make it that interchangeability preferably be arranged.

Claims

1, a kind of positive-displacement pump with slider and rotor, the pump housing (1) is tightly connected respectively with pump seat (5), pump cover (8), and belt pulley (7) is being fixed in the main shaft of transferring power (6) outer end, it is characterized in that:

A. the rotor (2) with the pump housing (1) Spielpassung is being fixed in the inner of main shaft (6), and chute (19) is arranged on the rotor (2), and the slide block (9) that departs from rotating center is arranged in the chute;

B. the interchangeable snout cavity (17), outlet plenum (18) and the back flash (20) that have symmetrical distribution on the pump housing (1) internal chamber wall;

C. in back flash (20), be provided with the bidirectional-reflux device;

D. in the chamber that the outside adjustment seat (10) of pump cover (8), cover plate (13) constitute, be provided with the flow regulator of adjusting slider (9) throw of eccentric.

2, variable displacement pump as claimed in claim 1 is characterized in that reflux is provided with reflux spring (21) and backflow plunger (22) in back flash (20).

3, variable displacement pump as claimed in claim 1 is characterized in that flow regulator is made up of handwheel (16), nut (15), adjustable lever (14), regulating block (11), the pin rod (12) that connects slide block (9).