CN203335393U

CN203335393U - Vane pump

Info

Publication number: CN203335393U
Application number: CN201320398711XU
Authority: CN
Inventors: 齐国兴; 王洪继
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-07-05
Filing date: 2013-07-05
Publication date: 2013-12-11
Anticipated expiration: 2023-07-05

Abstract

The utility model discloses a vane pump. The vane pump comprises a rotor and a hollow stator, wherein the inner cavity of the stator is oval, the rotor is arranged in the inner cavity of the stator, the rotor can rotate relative to the stator, a plurality of vanes are evenly distributed on the peripheral surface of the rotor in the circumference direction, the vanes can move back and forth in the radial direction of the rotor relative to the rotor, oil discs are arranged at the two end faces of the rotor, the vanes outwards extend out of the two end faces of the rotor to form extension portions, the side face of one side, facing towards the rotor, of each oil disc is provided with a cam, the peripheral surface of one end, facing towards the rotor, of each cam is connected with one side face, facing towards the rotation center of the rotor, of the extension portion of each vane in an abutting mode, and the protrusive direction of the peripheral surface where the cams and the vanes are connected in the abutting mode accords with the long axis direction of the oval inner cavity of the stator. The vane pump has the advantages that the defects that the viscosity of hydraulic oil in winter is large and the centrifugal force of the vane pump is insufficient when the vane pump is started or under the low pressure and low speed are overcome, and the vane pump can pump out the hydraulic oil effectively.

Description

Vane pump

Technical field

The utility model relates to a kind of oil hydraulic pump, and more particularly, the utility model relates to a kind of plug-in type vane pump.

Background technique

The working principle of vane pump: motor is by the rotation of transmission shaft rotor driven, epitrochanterian blade outwards slides under the effect of centrifugal force in blade groove, the outer end of blade is pressed on the internal surface of stator, seal, oil sucting cavity and oil-discharging cavity are separated, along with being rotated further of rotor, when blade moves to the orthodrome district from the small arc-shaped district of stator inner surface simultaneously, two volumes that seal between blade increase, just by the inlet port oil suction on side plate; When blade moves to the small arc-shaped district from the orthodrome district of stator inner surface, the volumes between two sealing blades diminish, by the force feed mouth oil extraction on side plate, when rotor often circles, blade is reciprocal twice in groove, completes twice suction, oil extraction process, therefore claim again double-acting vane pump.Hydraulic oil is pushed to the oil outlet end of the pump housing, and hydraulic oil is subject to continue compression and produces high pressure.And delivery side of pump end high pressure oil communicates with the hyperbaric chamber of blade inner end, the hydraulic oil of high pressure promotes blade and is pressed on stator inner surface, and blade can not come to nothing with stator inner surface, guarantees that high pressure oil passes through the lasting outwards output of oil outlet of the pump housing.

From the working principle of above-mentioned vane pump, can find out, when vane pump has just started, blade skids off the weight that needs centrifugal force that rotor produces to overcome blade itself from the blade groove of rotor also needs to overcome the adsorption force of hydraulic oil to blade in addition.Because hanging down hydraulic oil, temperature can be gel in the time of in the winter time; viscosity is stronger; adsorption force is larger; just a period of time of start usually can oil condition can not occur because blade can not skid off blade groove smoothly to cause vane pump; especially for the low speed vane pump of environment under low pressure, if substantially be difficult to use without special processing before start.So vane pump is difficult for the fuel-displaced insoluble hard nut to crack for the moment that becomes in the winter time.As Patent Office of the People's Republic of China in disclosed a CN202833142U patent application on March 27th, 2013, this patent name is " a kind of hydraulic vane pump ", the pump housing with fluid inlet and outlet and inner chamber that this pump mainly is comprised of the left pump housing and the right pump housing, rotatable and be radially distributed with a plurality of rotor rotor, be placed in the outer stator of rotor, be positioned at the stator two ends side plate, be positioned at the blade that rotor is extended and retract; Form a pumping space between two adjacent blades that stretch out and stator inner surface, rotor outer circle, biside plate, when rotor and blade stretch out, the volume in pumping space alternately enlarges and dwindles and convection cell generation suction and discharge effect, between stator inner surface and rotor outer circle, the one or more volume enlarged section of formation and volume dwindle section, by fluid inlet and above-mentioned pumping space, low-pressure fluid is imported to the volume enlarged section, dwindle section by above-mentioned pumping space and fluid output from volume and discharge high-pressure liquid; Each blade forms a blade foot passage thereunder and between rotor, and its foot passage of the blade in different section positions is supplied to the corresponding suitably fluid of pressure; One or more blades are equipped with in each blade bottom, one or more pins are equipped with in each rotor bottom, each blades forms a sub-blade chamber with blade at an upper portion thereof, each pin forms a pin chamber in its underpart and rotor, and provides pressure fluid to whole chambers or part chamber selectively by Auxiliary valves.This vane pump is fuel-displaced just comparatively difficult in the winter time.

Summary of the invention

The purpose of this utility model is to overcome above-mentioned defect, provide a kind of in the winter time when hydraulic oil approaches gel state blade still can skid off smoothly blade groove and pump the vane pump of hydraulic oil.

The purpose of this utility model is achieved in that a kind of vane pump, comprise rotor, the stator of hollow, the inner chamber of stator is ellipticity, rotor is located in the inner chamber of stator, rotor is rotatable with respect to stator, the rotor outer circumferential face circumferentially is evenly equipped with a plurality of blades, blade can radially moving around along rotor with respect to rotor, the both ends of the surface of rotor are respectively equipped with food tray outward, described blade stretches out extension to the both ends of the surface extension of rotor respectively, described food tray is provided with cam towards the side of rotor one side, cam connects towards a side at rotor center towards an end outer circumferential face and the blade extension of rotor, protrusion direction on the outer circumferential face of cam and blade butt and the long axis direction of stator oval shape inner chamber are consistent.Rotation along with rotor, blade slides on cam, when blade is sliding in protruding process, projection promotion blade overcomes own wt and hydraulic oil outwards slides to the adsorption force of blade, until blade connects towards side and the bore of stator surface of stator one side, rotor, stator, blade, food tray have formed airtight oil pocket, so just can complete oil suction, oil extraction process, guarantee that vane pump also can work when hydraulic oil viscosity is larger in the winter time.

Food tray can be connected as a single entity with cam.As preferably, described food tray is provided with circular groove towards the side of rotor one side, and described cam is fixedly connected in circular groove.Because the bearing surface of the cam as easily damaged parts and blade is shaped face, the surface Machining required precision is high, by food tray, cam split, is of value to simplified processing process, reduces manufacture cost, is conducive to interchangeability, saves user cost.

As preferably, the outer circumferential face of described cam and blade butt is ellipticity, and the elliptical periphery face of cam radially equates to the distance of stator oval shape inner peripheral surface along stator.The outer circumferential face shape of cam and blade butt and stator inner surface shape match like this, can guarantee that low pressure low speed vane pump can effectively pump hydraulic oil in cold snap in the winter time.

As preferably, described cam is towards an end of the food tray wheel rim that extends radially outwardly out, and wheel rim is fixedly connected in circular groove.Cam extends wheel rim, facilitates being threaded between food tray and cam, is conducive to I&M.

The beneficial effects of the utility model are: owing on food tray, arranging and having ellipsoidal cam, make blade to force to promote blade by cam and skid off rotor vane groove, direct reach the stator inner peripheral surface, overcome winter hydraulic oil viscosity large, when vane pump starts or the not enough problem of the centrifugal force of low pressure low speed vane pump, guarantee that vane pump effectively pumps hydraulic oil.

The accompanying drawing explanation

Fig. 1 is a kind of structure cross-sectional schematic of the utility model;

Fig. 2 is A-A cross-sectional schematic in Fig. 1;

Fig. 3 is the B section enlarged diagram in Fig. 1;

Fig. 4 is the food tray schematic diagram in the utility model.

In figure: 1. the pump housing, 2. stator, 3. right food tray, 4. cam, 5. rotor, 6. blade, 7. left food tray, 8. extension, 9. wheel rim, 10. abutting part.

Embodiment

Below by specific embodiment, and in conjunction with Figure of description, the technical solution of the utility model is further described in detail:

Embodiment: a kind of vane pump is as Fig. 1, shown in Fig. 2, comprise the pump housing 1, be provided with the stator 2 of hollow in the pump housing 1, the inner chamber of stator 2 is ellipticity, rotor 5 is located in the inner chamber of stator 2, rotor 5 is rotatable with respect to stator 2, rotor 5 is cylindric, be evenly distributed with 12 blade grooves on the outer circumferential face of rotor 5, the plane at blade groove place is by the longitudinal center line of rotor 5, be provided with the blade 6 of Spielpassung in blade groove, blade 6 can radially moving freely along rotor 5 in blade groove, as Fig. 1, shown in Fig. 3, blade 6 stretches out extension 8 to the both ends of the surface extension of rotor 5 respectively, the left side of rotor 5 is outside equipped with left food tray 7, the right side of rotor 5 is outside equipped with right food tray 3, left, right food tray is respectively equipped with circular groove on the side of rotor 5 one sides, as Fig. 3, shown in Fig. 4, be provided with cam 4 in two circular grooves, cam 4 is abutting part 10 towards an end of rotor 5, abutting part 10 is ellipticity, the long axis direction of abutting part 10 is consistent with the long axis direction of stator 2 inner chambers, radially the distance to stator 2 inner peripheral surfaces is equal everywhere along stator 2 for abutting part 10 outer circumferential faces, the other end of cam 4 wheel rim 9 that extends radially outwardly out, wheel rim 9 is threaded in circular groove, abutting part 10 and blade 6 extensions 8 of cam 4 connect towards a side of rotor 5 rotating centers.

Above-described embodiment is a kind of preferred version of the present utility model, not the utility model is done to any pro forma restriction, also has other variant and remodeling under the prerequisite that does not exceed the technological scheme that claim puts down in writing.

The content be not described in detail in this specification, belong to the known prior art of those skilled in the art.

Claims

1. a vane pump, comprise rotor, the stator of hollow, the inner chamber of stator is ellipticity, rotor is located in the inner chamber of stator, rotor is rotatable with respect to stator, the rotor outer circumferential face circumferentially is evenly equipped with a plurality of blades, blade can radially moving around along rotor with respect to rotor, the both ends of the surface of rotor are respectively equipped with food tray outward, it is characterized in that: described blade stretches out extension to the both ends of the surface extension of rotor respectively, described food tray is provided with cam towards the side of rotor one side, cam connects towards a side at rotor center towards an end outer circumferential face and the blade extension of rotor, protrusion direction on the outer circumferential face of cam and blade butt and the long axis direction of stator oval shape inner chamber are consistent.

2. vane pump according to claim 1, it is characterized in that: described food tray is provided with circular groove towards the side of rotor one side, and described cam is fixedly connected in circular groove.

3. vane pump according to claim 1 and 2, it is characterized in that: the outer circumferential face of described cam and blade butt is ellipticity, and the elliptical periphery face of cam radially equates to the distance of stator oval shape inner peripheral surface along stator.

4. vane pump according to claim 2 is characterized in that: described cam is towards an end of the food tray wheel rim that extends radially outwardly out, and wheel rim is fixedly connected in circular groove.

5. vane pump according to claim 3 is characterized in that: described cam is towards an end of the food tray wheel rim that extends radially outwardly out, and wheel rim is fixedly connected in circular groove.