CN85109203A

CN85109203A - Move radially gear pump with variable capacity (motor)

Info

Publication number: CN85109203A
Application number: CN85109203.9A
Authority: CN
Inventors: 杨德贵; 钟定莲
Original assignee: Individual
Current assignee: Individual
Priority date: 1985-05-16
Filing date: 1985-05-16
Publication date: 1987-06-03
Also published as: CN1007646B

Abstract

This invention belongs to mechanical hydraulic transmission technology field for the pump of positive displacement (motor), is the height balance gear pump (motor) that a kind of Topland is done supporting.Be characterized in: be provided with the controlled variable device, side plate is that two of differing in size of external diameter are spliced, a stator that can move radially is arranged between driven gear and the pump case, stroking mechanism moves stator, the stator driven gear moves together, and the overlap coefficient of gear engagement and centre distance are changed, and is maximum and equal in 1 scope at overlap coefficient, the more little discharge capacity of centre distance is big more, otherwise then more little.Interior engagement type variable principle is identical therewith.

Description

Move radially gear pump with variable capacity (motor)

Current, the All Around The World energy shortage, energy-conservation is the task of top priority, thereby the requirement of energy-conservation variable displacement pump (motor) was doubled with day, the development energy-conserving product becomes the developing direction of hydraulic element; Vane pump in the prior art (motor), plunger pump (motor) can both variablees, have only the gear pump (motor) can not variable only, and for filling up this blank, inventor spy has done this unprecedented exploration work.

Move radially gear pump with variable capacity (motor) as Fig. 1 Fig. 2 Fig. 3, Fig. 2 is the y-y sectional view of Fig. 1, this structure is done to design on supporting pump (motor) basis at Topland, by transmission shaft 1, driving gear 2, driven gear 3, active front side plate 4, active back side panel 5, driven front side plate 6, driven back side panel 7, " O " RunddichtringO 8 and 26, annular ring washer 9 and 27, stator 10 adjusting screw rod 11 " O " RunddichtringOs 12, locking nut 13,

ring washer

14,16,17,20, radial ball bearing 15, oil sealing 18, supporting ring 19, the pump housing 21 bonnets 22 screws 23, packing ring 24, etc. formation; The moving side plate of principal and subordinate is in different size, has increased stator and variable device, and all the other controlled deformation and realization radial equilibrium principle are all made supporting pump (motor) with Topland.

When adjusting screw rod leaves stator, because the radially effect of uneven hydraulic coupling of stator, stator is being with driven gear away from driving gear automatically, move radially together and lean against on the adjusting screw rod, at this moment main driven gear centre distance increases, and discharge capacity is reduced, otherwise, screw rod heads on stator makes driven gear near driving gear, and two-wheeled centre distance reduces, and at this moment discharge capacity increases; Dotted line position 10 is the limit position that stator and driven gear are shifted to driving gear among Fig. 2, and discharge capacity reaches maximum value.Stator is during in the opposite direction near housing, and discharge capacity is minimum.The 28 high pressure roads for the logical front side plate back side communicate with 32; Dotted line 29 communicates with low pressure port 33 for logical low pressure road, the back side panel back side; 30 and 31 passage flow ducts for logical gear face high pressure equilibrium assignment groove are symmetrical in the line of centers position low pressure flow passage road are arranged with 30 and 31 on the back side panel.

When moving radially gear pump with variable capacity (motor) for interior engagement, be the fixing external gear of radial position as Fig. 3,36,37 are fixed on locating stud on the side plate 40 for passing outer shim 39,43 are fixed on locating stud on the front and rear covers for shim 38 in passing, there is slotted hole position relevant with 43 on the side plate, is subjected to 43 restriction when mobile; 42 for being fixed on the stop pin that retrains interior shim 38 on the front and rear covers; Flow is adjusted screw rod 41 and is being pushed away and support 34 internal gear 35 side plates 40 outer shims 39 pins 37 are moved radially together, and the Gear center distance reaches the variable purpose inside and outside changing; Inside and outside shim 38 and 39 slides along AB face and CD face.External gear line of centers in AB is parallel with CD.

The gear of gear pump with variable capacity (motor) is the long tooth of multiple tooth number, increases tooth depth and solves transmission with double modulus and interfere, and maximum overlap coefficient is more than 2, and when driven gear moved radially maximum distance between centers, overlap coefficient was 1, at this moment the discharge capacity minimum; Otherwise, discharge capacity maximum then; Gear engagement is at overlap coefficient 1 with greater than 2 o'clock, the discharge capacity scope be delivery 20%～100% between stepless variable; And the optimization variables scope of the variable displacement pump of other patterns (motor) is 60%～80% of a delivery, and the range of variables overwhelming majority also is at optimum range in the actual conditions, and special advantages will take place this cheap gear pump with variable capacity simple in structure.

Except that above-mentioned manual controlled variable, the same with other variable displacement pumps (motor), also also have other various control modes.

Claims

1, a kind of Topland is made the radial height balance gear pump (motor) of supporting, be characterized in: the device that is provided with controlled variable, side plate is that two of differing in size of external diameter are spliced, a stator that can move radially is arranged between driven gear and the pump case, when stroking mechanism moved stator, stator drove driven gear and moves overlap coefficient and the centre distance change that makes gear engagement together; In the overlap coefficient maximum with in greater than 1 scope, the more little then flow of the centre distance of main driven gear is big more, otherwise, then more little.Pump (motor) is interior when engagement type, and supporting internal gear, outer shim move radially together, and inside and outside shim has two slip surfaces that are parallel to the gear line of centers to seal, and variable principle is the same with outer gearing.

2, as requiring as described in 1, variable device is for removing other the various control gear manually controlling.