CN103321901A

CN103321901A - Vane pump

Info

Publication number: CN103321901A
Application number: CN2013102810634A
Authority: CN
Inventors: 齐国兴; 王洪继
Original assignee: Individual
Current assignee: Taizhou Hongyi Hydraulic Servo Technology Co ltd
Priority date: 2013-07-05
Filing date: 2013-07-05
Publication date: 2013-09-25
Anticipated expiration: 2033-07-05
Also published as: CN103321901B

Abstract

The invention discloses a vane pump. The vane pump comprises a rotor and a hollow stator, wherein an inner cavity of the stator is in an oval shape, the rotor is arranged in the inner cavity of the stator, the rotor can rotate relative to the stator, a plurality of vanes are circumferentially and uniformly distributed at the peripheral face of the rotor and can move back and forth relative to the rotor along the radial direction of the rotor, and oil discs are respectively arranged outside two end faces of the rotor; and the stretching parts respectively stretch to two end faces of rotor from the vanes, cams are arranged on the side faces of one sides, facing the rotor, of the oil discs, the peripheral faces, facing the rotor, of the cams are abutted with one side faces, facing the rotating center of the rotor, of the stretching parts of the vanes, and the directions of bulges on the peripheral faces, abutted with the vanes, of the cams are accordant with the direction of a long shaft of the oral inner cavity of the stator. The vane pump has the beneficial effects that the problem that the centrifugal force of the vane pump or a low-pressure low-speed vane pump is insufficient during startup because the viscidity of hydraulic oil is high in winter is solved, and the hydraulic oil is guaranteed to be effectively pumped out by the vane pump.

Description

Vane pump

Technical field

The present invention relates to a kind of oil hydraulic pump, more particularly, the present invention 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 in blade groove under the effect of centrifugal force, the outer end of blade is pressed on the internal surface of stator, seal, simultaneously 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, two volumes that seal between the blade increase, just by the inlet port oil suction on the side plate; When blade moved to the small arc-shaped district from the orthodrome district of stator inner surface, the volumes between two sealing blades diminished, by the force feed mouth oil extraction on the side plate, when rotor whenever circles, blade is reciprocal twice in groove, finishes 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 subjected 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, and the hydraulic oil of high pressure promotes blade and is pressed on the 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.

Can find out from the working principle of above-mentioned vane pump, when vane pump had just started, blade skids off the weight that the centrifugal force that needs rotor to produce overcomes blade itself from the blade groove of rotor also needed to overcome hydraulic oil in addition to the adsorption force of blade.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 the start.So vane pump is difficult for the fuel-displaced for the moment insoluble hard nut to crack that becomes in the winter time.Such 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, place 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, the one or more volume enlarged section of formation and volume dwindle section between stator inner surface and the rotor outer circle, by fluid inlet and above-mentioned pumping space low-pressure fluid is imported the volume enlarged section, dwindle section by above-mentioned pumping space and fluid output from volume and discharge high-pressure liquid; Each blade consists of a blade foot passage thereunder and between rotor, and its foot passage of blade that is 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 object of the invention is to overcome defects, blade still can skid off smoothly blade groove and pump the vane pump of hydraulic oil when a kind of in the winter time hydraulic oil was provided near gel state.

The object of the present invention is achieved like this: 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, and the 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 at cam, sliding into when blade in the process of projection, 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 consisted of airtight oil pocket, so just can finish 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 the circular groove.Owing to being shaped face as the cam of easily damaged parts and the bearing surface of blade, the surface Machining required precision is high, with 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 the 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 the circular groove.Cam extends wheel rim, makes things convenient for being threaded between food tray and the cam, is conducive to I﹠M.

The invention has the beneficial effects as follows: have ellipsoidal cam owing to arranging on the food tray, so that can forcing to promote blade by cam, blade skids 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.

Description of drawings

Fig. 1 is a kind of structure cross-sectional schematic of the present invention;

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

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

Fig. 4 is the food tray schematic diagram among the present invention.

Among the 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 technological scheme of the present invention is further described in detail:

Embodiment: a kind of vane pump such as Fig. 1, shown in Figure 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 the blade groove, blade 6 can radially moving freely along rotor 5 in blade groove, such as Fig. 1, shown in Figure 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, such as Fig. 3, shown in Figure 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 the circular groove, and 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 invention, is not the present invention is done 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 that is not described in detail in this specification belongs to the known prior art of those skilled in the art.

Claims

1. 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, and the 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 the 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 the 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 the circular groove.