CN103790822A

CN103790822A - Spiral pump

Info

Publication number: CN103790822A
Application number: CN201410080257.2A
Authority: CN
Inventors: 肖计振; 高林发
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-03-06
Filing date: 2014-03-06
Publication date: 2014-05-14

Abstract

A spiral pump comprises a casing, an upper cover, a lower cover, wherein the upper cover and the lower cover are connected with two ends of the casing, a driving shaft and a driven shaft are arranged in the casing, a driving gear and a driven gear which are meshed with each other are respectively fixed on two shafts, racks on the gears are V-shaped and symmetrical in shape, and two shafts are sleeved by shaft sleeves. One end of the driving shaft extends out of the casing and is connected with a motor, the other end of the driving shaft and two ends of the driven shaft are respectively connected with bearings, and the casing is provided with an oil inlet, an oil outlet, a lower oil distributing port and an upper oil distributing port. The lower oil distributing port and the upper oil distributing port are respectively communicated with the oil inlet and the oil outlet, the upper cover and the lower cover are respectively provided with bearing holes and oil grooves, one end of each oil groove is communicated with the corresponding bearing hole, and the other end of each oil groove is communicated with the lower oil distributing port. When the driving gear drives the driven gear to perform meshing motion, axial component forces produced by two ends of each gear are opposite in direction and respectively and automatically offset, so that the spiral pump is free of shake and low in noise, the end faces of the shaft sleeves are not abraded, inside leakage and sealing failure occurred in the spiral pump are avoided, and the volumetric efficiency of the spiral pump is ensured.

Description

Volute pump

Technical field

The present invention relates to a kind of volute pump.

Background technique

At present, rotor in volute pump mostly adopts two circular arc sinusoidal curve gears, compares with other straight-tooth wheel pump with Involute Spur Gear pump, and it is steady that this volute pump has the fluid flow of discharge, pulse little, without pocketed oil, volumetric efficiency is high, can tolerate higher rotating speed, its rated speed can be up to 3500 turning/per minute more than, delivery pressure can be up to more than 250KG, and substantially shockproof, has the plurality of advantages such as noise is low, volume is little, lightweight, easy for installation.But volute pump can produce an axial thrust load in the time of work on circular tooth gear, this axial thrust load acts directly on sealing axle sleeve end face, produces serious abrasion, thereby increases the axial clearance between circular tooth gear end face and axle sleeve, cause letting out in this volute pump generation, volumetric efficiency reduces rapidly and damages.The problem increasing for solving volute pump axial clearance, engineers and technicians have carried out flexible improvement on spiral pump structure.First measure is: on volute pump rear end cover inner side end, offer an all type oil groove of 2/3rds semi-rings that are connected with sealing axle sleeve bottom opposite position, this oil groove communicates with oil outlet (high pressure side), when sealing axle sleeve contact with circular tooth gear end face because of friction occur gap increase time, oil groove pressure is pushed axle sleeve to circular tooth gear, the gap that axle sleeve and gear two are contacted between end face reduces, thereby reach nose balance, in preventing axially, let out, and guarantee the original volumetric efficiency of this volute pump, when end face of shaft bush or gear face abrasion loss are when excessive, its axial clearance will exceed the seal ring height around semi-ring week oil groove, pressure oil in oil groove will leak, cannot produce thrust and proceed compensation, axial clearance constantly increases in generation and lets out, volume also constantly reduces thereupon simultaneously.In order to reduce the frictional force between gear face and end face of shaft bush, engineers and technicians have increased again by the second cover improvement project on this basis, its scheme is: the position (namely on two centers of circle of all oil grooves of semi-ring) that faces gear shaft end face on the side end face in rear end cover, be provided with pair of pistons hole and and semi-ring week oil groove, the all oil grooves of semi-ring communicate with oil outlet high pressure side equally, each one piece of piston (also claiming floating pearl) of placing in two piston holes, oil pressure applies a thrust contrary with gear axial force by piston to gear shaft end face.This two sets of plan compound, most of axial force can be offset, while being applied on the driving arrangement of constant rotational speed, temporarily produce good effect, but as (as: adjustable frequency motor while being applied on the driving arrangement that rotation speed change is larger, servomotor, adjustable bow curved roll speed motor), this piston thrust always lags behind the axial thrust load of gear, cause this exteranl gear axial thrust load to become to impact shape and act on end face of shaft bush, make its friction become more complicated more greatly, can cause rapidly end face of shaft bush wearing and tearing, still cannot fundamentally go to eliminate its consequent friction, can not effectively prevent volute pump because of in let out caused damage, floating pearl time one in piston hole is long in addition, piston hole also can wear and tear to become in causing greatly and let out, the volute pump of above-mentioned two kinds of improvement structures, particularly be applied in the plastic machine hydraulic system with servo-drive, in causing thus, let out damage even more serious.

Summary of the invention

The object of the invention is to overcome above-mentioned the deficiencies in the prior art, provide a kind of simple in structure, good seal performance, noise low, let out phenomenon and the high volute pump of volumetric efficiency in can not producing.

The present invention realizes like this, a kind of volute pump, comprise a upper cover, one lower cover and a housing, sealing is connected with upper cover in described housing upper end, described housing lower end is connected with described lower cover sealing, in described housing, be provided with a driving shaft and a driven shaft, on described driving shaft and driven shaft, be installed with respectively intermeshing driving gear and driven gear, on described driving shaft and described driven shaft, be all arranged with the axle sleeve being fixed on described housing, described axle sleeve and described driving shaft, driven shaft, between driving gear end face and driven gear end face, be Spielpassung, described driving shaft one end is stretched out outside described housing and is connected with a motor, the described driving shaft the other end is connected with a bearing respectively with described driven shaft two ends, on described housing, offer respectively a filler opening, one oil outlet and communicate respectively with described filler opening and described oil outlet divide on hydraulic fluid port and one a point hydraulic fluid port once, described upper cover and described under cover and offer respectively a bearing hole and an oil groove, described oil groove one end communicates with described bearing hole, the described oil groove the other end communicates with a described lower point hydraulic fluid port, tooth bar on tooth bar on described driving gear and described driven gear is V-shape, and the tooth bar shape symmetry on the tooth bar on described driving gear and described driven gear.

Particularly, the V-shape tooth bar on V-shape tooth bar and the described driven gear on described driving gear forms by two sections of shape symmetries and the contrary two circular arc sinusoidal curve teeth of Hand of spiral.

Preferably, the tooth bar on tooth bar and the described driven gear on described driving gear is provided with seven.

Because the V-shape tooth bar on V-shape tooth bar and driven gear on driving gear forms by two sections of shape symmetries and the contrary two circular arc sinusoidal curve teeth of Hand of spiral, so in the time that driving gear does gear motion with driven gear, no matter turn clockwise or be rotated counterclockwise, the axial thrust load direction that driving gear and driven gear two ends produce is always offset on the contrary and separately voluntarily, shockproof, noise is low, can be applied on the driving arrangement that rotation speed change is larger (as adjustable frequency motor, servomotor, adjustable bow curved roll speed motor), can not make end face of shaft bush wearing and tearing, avoid in generation, letting out and seal failure phenomenon in volute pump, and guarantee the volumetric efficiency of volute pump.

Accompanying drawing explanation

In order to be illustrated more clearly in technological scheme of the present invention, to the accompanying drawing of required use in embodiment be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.

Fig. 1 is the schematic diagram of the volute pump that provides of the embodiment of the present invention;

Fig. 2 is the cut-away view along the A-A direction in Fig. 1;

Fig. 3 is driving gear and the intermeshing schematic diagram of driven gear in Fig. 1;

Fig. 4 is the schematic diagram of the driving gear in Fig. 1;

Fig. 5 is the schematic diagram of the driven gear in Fig. 1.

Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technological scheme in the embodiment of the present invention is clearly and completely described.

As shown in Fig. 1 ~ Fig. 5, a kind of volute pump that the embodiment of the present invention provides, comprise a upper cover 1, one lower cover 2 and a

housing

3, 1 sealing is connected with upper cover in housing 3 upper ends, 2 sealings are connected with lower cover in housing 3 lower ends, in housing 3, be provided with a driving shaft 4 and a driven shaft 5, on driving shaft 4 and driven shaft 5, be installed with respectively intermeshing driving gear 6 and driven gear 7, on driving shaft 4 and driven shaft 5, be all arranged with the axle sleeve 8 being fixed on housing 3, axle sleeve 8 and driving shaft 4, driven shaft 5, between driving gear 6 end faces and driven gear 7 end faces, be Spielpassung, driving shaft 4 one end are stretched out outside housing 3 and are connected with a motor (not shown), driving shaft 4 the other ends are connected with a bearing 9 respectively with driven shaft 5 two ends, on housing 3, offer respectively a filler opening 10, one oil outlet 11 and communicate respectively with filler opening 10 and oil outlet 11 divide on hydraulic fluid port 12 and one a point hydraulic fluid port 13 once, on upper cover 1 and lower cover 2, offer respectively a bearing hole 14 and an oil groove 15, oil groove 15 one end communicate with bearing hole 14, oil groove 15 the other ends communicate with lower point of hydraulic fluid port 12, tooth bar 71 on tooth bar 61 and driven gear 7 on driving gear 6 is V-shape, and the tooth bar 71 shape symmetries on tooth bar 61 and driven gear 7 on driving gear 6.

Particularly, the V-shape tooth bar 61 on described driving gear 6 and the V-shape tooth bar 71 on driven gear 7 form by two sections of shape symmetries and the contrary two circular arc sinusoidal curve teeth of Hand of spiral.

Preferably, the tooth bar on the tooth bar on described driving gear and described driven gear is provided with seven, can realize best mechanical transmission effect.

The working principle of volute pump of the present invention is: in the time that the driving shaft 4 on driven by motor volute pump rotates, driving gear 6 on driving shaft 4 drives the driven gear 7 on driven shaft 5 to rotate, because the V-shape tooth bar 71 on V-shape tooth bar 61 and driven gear 7 on driving gear 6 forms by two sections of shape symmetries and the contrary two circular arc sinusoidal curve teeth of Hand of spiral, so in the time that driving gear 6 does gear motion with driven gear 7, no matter turn clockwise or be rotated counterclockwise, the axial thrust load direction that driving gear 6 and driven gear 7 two ends produce is always offset on the contrary and separately voluntarily, make volute pump shockproof, noise is low, can be applied on the driving arrangement that rotation speed change is larger (as adjustable frequency motor, servomotor, adjustable bow curved roll speed motor), can not make axle sleeve 8 end wears, avoid in generation, letting out and seal failure phenomenon in volute pump, and guarantee the volumetric efficiency of volute pump.

The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications are also considered as protection scope of the present invention.

Claims

1. a volute pump, comprise a upper cover, one lower cover and a housing, sealing is connected with upper cover in described housing upper end, described housing lower end is connected with described lower cover sealing, in described housing, be provided with a driving shaft and a driven shaft, on described driving shaft and driven shaft, be installed with respectively intermeshing driving gear and driven gear, on described driving shaft and described driven shaft, be all arranged with the axle sleeve being fixed on described housing, described axle sleeve and described driving shaft, driven shaft, between driving gear end face and driven gear end face, be Spielpassung, described driving shaft one end is stretched out outside described housing and is connected with a motor, the described driving shaft the other end is connected with a bearing respectively with described driven shaft two ends, on described housing, offer respectively a filler opening, one oil outlet and communicate respectively with described filler opening and described oil outlet divide on hydraulic fluid port and one a point hydraulic fluid port once, described upper cover and described under cover and offer respectively a bearing hole and an oil groove, described oil groove one end communicates with described bearing hole, the described oil groove the other end communicates with a described lower point hydraulic fluid port, it is characterized in that, tooth bar on tooth bar on described driving gear and described driven gear is V-shape, and the tooth bar shape symmetry on the tooth bar on described driving gear and described driven gear.

2. volute pump according to claim 1, is characterized in that, the V-shape tooth bar on V-shape tooth bar and described driven gear on described driving gear forms by two sections of shape symmetries and the contrary two circular arc sinusoidal curve teeth of Hand of spiral.

3. volute pump according to claim 1 and 2, is characterized in that, the tooth bar on the tooth bar on described driving gear and described driven gear is provided with seven.