CN2069040U

CN2069040U - Multi-disc type gear pump

Info

Publication number: CN2069040U
Application number: CN 90202455
Authority: CN
Inventors: 吴百海
Original assignee: GUANGDONG POLYTECHNICAL COLLEGE
Current assignee: GUANGDONG POLYTECHNICAL COLLEGE
Priority date: 1990-03-03
Filing date: 1990-03-03
Publication date: 1991-01-09

Abstract

The utility model discloses a multidisc-typed gear pump structure which effectively solves the puzzles of lowering pulse rate and noise. The utility model can be widely used in the field of mechanical engineering. The accurate mathematical model and the pulse rate formula are provided by the utility model; n kinds of new design methods of superposition of period and flow quantity with different phases, and the corresponding novel structure and process measure are created; the pulse rate drops to 1/n + [2]. The utility model has the advantages of compaction, simple process, strong anti-pollution capability, low cost, etc. of the original gear pump; the utility model which also has the advantages of the progress of small pulse and low noise and good feasibility can partially replace other classes of pumps with high price.

Description

Multi-disc type gear pump

The utility model is the multidisc gear pump.

The utility model is widely used in various mechanical engineering technical field, especially more generally is suitable for as Hydraulic power units, and it is specially adapted to intermediate flow, the above gear pump structure of mesohigh.

In the prior art, gear pump has compact structure, easily make, antipollution power is strong, and advantages such as cheapness, its applications is very extensive, but its pulsation rate and noise are big, conversely, have limited its further expansion using scope to a certain extent.The present utility model the multidisc structure, efficiently solve a difficult problem that reduces pulsation rate and noise.The retrieval of international online information retrieval center shows that the utility model does not have precedent as yet.

Goal of the invention of the present utility model is to reduce the pulsation rate and the noise of gear pump significantly.Promptly on performance, advantage such as existing antipollution power is strong, in light weight, inexpensive has the advance of little pulsation, low noise again concurrently; On structure and technology, compact, simple, feasibility is good; Economically, popularizing prospect is good, and part replaces the pump class that involves great expense, obvious social benefit.

The utility model is on the basis of analysing in depth research gear pump structure and pulsation mechanism, found mathematical models and pulse rate calculation formula, the novel design method of the cycle flow stack of out of phase is proposed, according to novel design method design and invent corresponding multidisc structure (referring to Fig. 1), thereby make pulsation rate reduce to 1/n ²(n is the split blade type number).By the 5 widely different commentaries on classics of driving shaft 1 actuation gear, each gear is designed to along the appropriate location of circumferentially staggering mutually again.When gear pair is made gear motion, because involute profile engagement and the effect of force feed fluid will produce the cycle variable flow.N promptly produces the cycle flow of n out of phase to the gear engagement of staggered positions, and they converge at oil drain out, and has mutual compensating action, and the output flow pulsation rate and the noise of pump reduce significantly, accomplish the end in view.

The utility model has the advantages that: (1), significantly solved a difficult problem that reduces pulsation rate and noise, pulsation rate is reduced to 1/n ²To making little pulsation gear pump new range product great technical meaning is arranged.(2), compact structure, simple, technological measure realizes that easily feasibility is good.(3), both kept advantages such as the anti-soil power of original gear pump is strong, in light weight, inexpensive on the performance, have the advance of little pulsation, low noise again concurrently.Pulsation rate reduces significantly, during as n=3, reduces to 11%, during n=4, reduces to 6.3%.(4), only need pay little cost on the manufacturing process, can partly replace other pump class that involves great expense, using scope enlarges more, the social benefit height.Rough calculation, the cost of medium-sized multidisc gear pump is lower more than 300 yuan than plunger pump, is 10,000 (dwindling numeral) as annual consumption, and the economic benefit of bringing every year just reaches more than 3,000,000 yuan.

Two parts in the utility model accompanying drawing.Fig. 1, be pump housing internal component structural drawing.Fig. 2, be outline drawing.Among Fig. 1: 1, driving shaft; 2, bearing support; 3, bearing; 4, dividing plate; 5, driving gear; 6, side plate; 7, driven gear; 8, driven shaft; 9, key.

Implementation of the present utility model is guaranteed by structural design and technological measure.The n that is assemblied in driving shaft (1) and driven shaft (8) (referring to Fig. 1, among the figure, n=3) make equal thickness, and each gear is along circumferentially staggering (t)/(n) position (t is a circular pitch length) mutually to gear pair.The keyway of n driving gear (5) works to guarantee the amount of staggering (t)/(n).Measure guarantees its accurate position with regard to adopting process when cutting in the keyway position.Assembling solves the problem that staggers mutually between gear with checking the number.The driven gear (7) that is loaded on the driven shaft (8) only has a processing keyway, and all the other are smooth hole, brings the bad influence of meshing performance so that eliminate machining error.N has dividing plate (4) to separate to all designing between the gear pair, becomes relatively independent structure.Also have side plate (6) to separate between bearing support (2) and the gear pair, lateral plate structure (together with Sealing) plays the automatic backlash compensating action, to guarantee to have high volumetric efficiency.The Sealing decrement will guarantee that in prespecified range the axial dimension of each part is made by tolerance range mean value.

Claims

A kind of novel low pulsation, the multidisc gear pump of low noise, it is characterized in that by driving shaft (1), driving gear (5), driven gear (7), dividing plate (4), side plate (6) (together with Sealing), driven shaft (8), key (9), bearing support (2) and bearing parts such as (3) constitute, be assemblied in the position that the n on driving shaft and the driven shaft circumferentially staggers (t)/(n) mutually to equal thickness gear pair edge, and form n relatively independent multidisc structure that makes up closely again in the pump by the effect of dividing plate.