CN103759121B - A kind of Rotor-type variable pump - Google Patents
A kind of Rotor-type variable pump Download PDFInfo
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- CN103759121B CN103759121B CN201410021435.4A CN201410021435A CN103759121B CN 103759121 B CN103759121 B CN 103759121B CN 201410021435 A CN201410021435 A CN 201410021435A CN 103759121 B CN103759121 B CN 103759121B
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Abstract
The application provides a kind of Rotor-type variable pump, comprises the pump housing, pump cover, internal rotor and external rotor, and the pump housing and pump cover enclose and form rotor cavity and pipeline structure, and this pipeline structure comprises and is positioned at described rotor cavity both sides and the entrance region do not communicated and outlet area; At least comprise between internal rotor and described external rotor a profile close, with the working zone of described entrance region and outlet area alternate communication; Drive unit is rotated around this internal rotor medial axis by internal rotor described in drive shaft; This Rotor-type variable pump comprises adjustment ring, fixing tooth section and force application device; Adjustment ring is provided with adjustment tooth section, adjustment ring by external force act on the restriction of described fixing tooth section under deflect.This Rotor-type variable pump adopts gearing methods to complete the rotation of adjustment ring, and the gear mating part of adjustment ring only occupies the comparatively small scale of adjustment ring periphery, and other positions are then simple circumference contact, and the sealing of adjustment ring position is easily ensured.
Description
Technical field
The application relates to a kind of oil hydraulic pump, is specifically related to a kind of Rotor-type variable pump.
Background technique
At present, with the oil pump of matching with automobile engine from traditional metering pump to variable displacement pump transition.Variable displacement pump can regulate pump delivery voluntarily according to the pressure of outlet end, thus reduces energy loss on the basis meeting job requirement, improves capacity usage ratio; Decrease the pressure that pump bears simultaneously, thus extend the working life of oil pump.
Variable displacement pump is the trend of technical development, has occurred multiple variable displacement pump now.
One " the variable rotor engine oil pumps of impeller regulation and control " is disclosed in Chinese invention patent specification CN102095068A.This variable rotor engine oil pump is regulated and controled ring, external rotor, internal rotor, transmission shaft, spring and safety valve component formed by the pump housing, pump cover, impeller.Together with the pump housing is bolted with pump cover.In impeller annular distance on the pump housing of impeller regulation and control ring and spring fitting and spring slotted eye, with internal rotor interference fit in the middle part of transmission shaft, and be installed to impeller in the lump together with external rotor and regulate and control in the axis hole of intermediate hole on ring and the pump housing, pump cover.Impeller annular distance both sides in the pump housing and bottom surface are provided with oil suction chamber and go out oil pocket and oil road and oil outlet, and its oil outlet communicates with the oil duct of motor.The oil road of the pump housing is provided with safe valve opening, and safe valve opening communicates with oil road, is provided with oil leak hole in the passage of safe valve opening, is provided with a safety valve component in safe valve opening.The junction plane of pump cover and the pump housing is provided with oil input channel and filler opening, and filler opening communicates with oil header, and oil input channel is communicated with the oil suction chamber of the pump housing.
In above-mentioned variable rotor engine oil pump, the outside of impeller regulation and control ring is provided with leaf valve and return valve, and not etc., its face away from spring is not greater than the face near spring for the area on leaf valve two sides.Safety valve component is made up of steel ball valve, Regulation spring and regulating screw, and steel ball valve withstands on the passage of safe valve opening and oil road under the spring-force driven dual of Regulation spring.
Above-mentioned variable rotor engine oil pump according to fuel-displaced cavity pressure reconditioner oil pump delivery, can achieve variable-flow and exports, but also there is a lot of defect:
First, impeller form solves the problem becoming discharge capacity, but impeller expanded range is wider, fit dimension is long, more than basic covering impeller adjustment ring half circumference, between such pump housing and impeller regulation and control ring, the cooperation of long distance easily produces internal leakage, can reduce the efficiency of oil pump.
Secondly, impeller profile and the pump body structure coordinated with impeller are random special surface, need special numerically controlled processing equipment manufacturing, and processing technology is complicated, cost is high.
Again, the adjustment of impeller form will ensure to regulate steadily, needs larger length of thread engagement, makes the space that occupies needed for impeller adjustment ring very large, makes this Rotor-type variable pump entirety take up space larger.
Summary of the invention
The application provides a kind of Rotor-type variable pump, to solve internal leakage in prior art, processed complex and the large problem that takes up space.
The application provides a kind of Rotor-type variable pump, and this Rotor-type variable pump comprises the pump housing, pump cover, internal rotor and external rotor,
The described pump housing and described pump cover enclose form accommodating internal rotor, external rotor rotor cavity and provide the pipeline structure in path for working medium, this pipeline structure comprises and is positioned at described rotor cavity both sides and the entrance region do not communicated and outlet area;
At least comprise the working zone that a profile is closed between described internal rotor and described external rotor, move with described internal rotor in described working zone and the area of closed outline changes in movement process; Described working zone and described entrance region and outlet area alternate communication;
Described variable displacement pump is driven by drive unit;
Described variable displacement pump comprises the live axle with described internal rotor secure fit, or described drive unit comprises live axle, described internal rotor is provided with the attachment hole with this live axle secure fit;
Described drive unit is rotated around this internal rotor medial axis by internal rotor described in described drive shaft;
The described pump housing and/or described pump cover relevant position are provided with the axis hole of accommodating described live axle;
It is characterized in that:
Described Rotor-type variable pump comprises adjustment ring, fixing tooth section and force application device;
Described adjustment ring is arranged at described external rotor outer rim, and described external rotor rotates freely around its medial axis in described adjustment ring;
Described adjustment ring is provided with adjustment tooth section, described pump housing relevant position is provided with the described fixing tooth section matched with this adjustment tooth section, described adjustment ring by external force act on the restriction of described fixing tooth section under deflect, described adjustment tooth section and described fixing tooth section matching relationship make internal rotor medial axis described in the line-spacing of external rotor center shaft described in deflection apart from constant;
Described force application device applies to described adjustment ring the power pointing to described outlet area.
Optionally, described adjustment tooth section and/or described fixing tooth section carry out Interference modification, remove the Interference point hindering relative movement.
Optionally, described adjustment ring comprises at least one auxiliary projection, this auxiliary projection extends radially outwardly along described adjustment ring, described rotor cavity is provided with the curved-surface structure matched with this auxiliary projection, described auxiliary projection contacts with curved-surface structure corresponding on described rotor cavity all the time in described adjustment ring movement process, isolated described entrance region and described outlet area.
Optionally, described adjustment ring comprises the first auxiliary projection, the second auxiliary projection, the 3rd auxiliary projection that are arranged at described adjustment tooth section offside.
Optionally, an auxiliary projection is had in three described auxiliary projection simultaneously for bearing the active force of described force application device.
Optionally, described force application device applied force is elastic force, and this force application device comprises force application rod, spring and spring seat, and described spring seat is arranged on the described pump housing, and described force application rod is connected with the spring be arranged on described spring seat.
Optionally, described force application rod action direction is parallel to the resultant direction of the hydraulic coupling of described outlet area and entrance region suffered by described adjustment ring.
Optionally, described fixing tooth section and the described pump housing are split-type structural.
Optionally, between described internal rotor and described external rotor be inside engaged gear structure.
Optionally, described adjustment ring is provided with the load matched with described force application device protruding, this load projection is the protruding structure extended radially outwardly along described adjustment ring, for bearing the active force of described force application device.
Compared with prior art, the rotor variable pump that the application provides has the following advantages:
First, the Rotor-type variable pump that the application provides adopts gearing methods to complete the rotation of adjustment ring, the gear mating part of adjustment ring only occupies the comparatively small scale of adjustment ring periphery, and other positions are then simple circumference contact, and the sealing of adjustment ring position is easily ensured.
Secondly, the Rotor-type variable pump provided due to the application adopts gearing methods to complete the rotation of adjustment ring, and the processing technology of gear structure is ripe, without the need to special equipment and specialized designs, significantly reduces processing cost.
Again, the ratio that the gear parts of the adjustment ring of this Rotor-type variable pump occupies adjustment ring periphery is less, make space occupied by adjustment ring entirety much smaller than wave wheel type adjustment ring, and then make the overall structure of this Rotor-type variable pump easily be easier to miniaturization, for the arrangement of the device of other and this part fits provides more space.
Preferably, the application adopts removal Interference point method to carry out Interference modification, and the adjustment tooth section close for the number of teeth and fixing tooth section remove corresponding Interference point, and the internal gearing structure making the number of teeth close can move mutually.This method overcomes technology prejudice, and, adopt the principle of gears meshing, ensure that the movement locus of described adjustment ring in deflection, make the medial axis of described external rotor remain constant apart from the medial axis distance of described internal rotor.
Preferably, Rotor-type variable pump provided by the invention, described adjustment ring is provided with at least one auxiliary projection with described adjustment tooth section to side position, and this auxiliary projection extends radially outwardly along described adjustment ring.The curved-surface structure matched with this auxiliary projection is provided with on described, described auxiliary projection in described adjustment ring movement process all the time with corresponding surface form touch on described rotor cavity, isolated described entrance region and described outlet area, in movement process, play good seal action, meanwhile, effectively limit again the movement locus of described adjustment ring, described in described external rotor center shaft line-spacing, internal rotor medial axis distance remains constant.
Preferred further, Rotor-type variable pump provided by the invention, position relative with described adjustment tooth section in described adjustment ring is provided with three auxiliary projection, is the first auxiliary projection, the second auxiliary projection and the 3rd auxiliary projection.Accordingly, described rotor cavity is provided with three curved-surface structures corresponding with it.Three auxiliary projection seal with corresponding curved-surface structure all the time in described adjustment ring process and fit, and further enhancing the sealing effect between entrance region and outlet area, make the movement locus of described adjustment ring more accurate.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the embodiment that the application provides.
Fig. 2 is embodiment's middle pump body structural drawing that the application provides.
Fig. 3 is the schematic diagram that embodiment's Elastic bar of providing of the application and adjustment ring coordinate.
Example illustrates:
Note: example sequence number whippletree preceding digital represents figure number herein, the sequence number after whippletree in this figure of numeral.Example 2-1 represents the first example in Fig. 2.
1-1: the pump housing, 1-2: tapped hole, 1-3: adjustment ring, 1-4: external rotor, 1-5: fixing tooth section, 1-6: internal rotor, 1-7: oil discharge passage, 1-8: safety unloading valve, 1-9: oil outlet, the 1-10: the first auxiliary projection, the 1-11: the second auxiliary projection (effect is protruding), 1-12: force application device, the 1-13: the three auxiliary projection, 1-14: oil inlet passage, 1-15: filler opening, 1-16: attachment hole;
2-1: oil pocket, 2-2 are joined in oil-feed: axis hole, 2-3: fuel-displacedly join oil pocket;
3-1: spring seat, 3-2: adjustment tooth section, 3-3: force application rod, 3-4: spring.
Embodiment
Set forth a lot of detail in the following description so that fully understand the application.But the application can be much different from alternate manner described here to implement, those skilled in the art can when doing similar popularization without prejudice to when the application's intension, and therefore the application is by the restriction of following public concrete enforcement.
Fig. 1 to Fig. 3 shows the embodiment of a kind of Rotor-type variable pump that the application provides.The Rotor-type variable pump of the present embodiment is used for motor car engine as the power unit of vehicle lubricating system, and be therefore called again change displacement oil pump in the present embodiment, be called for short variable displacement pump, working medium is wherein machine oil.Certainly, the Rotor-type variable pump that the application provides can also be applied to other occasions, as water pump etc.
Described variable displacement pump comprises pump housing 1-1, pump cover (not shown), internal rotor 1-6, external rotor 1-4, safety unloading valve 1-8 and regulating mechanism.
Described pump housing 1-1 and pump cover form the fondational structure of this variable displacement pump, support for variable displacement pump component provide mounting point and install.
Described pump housing 1-1 and described pump cover cooperatively interact, and corresponding position offers tapped hole (as tapped hole 1-2), is connected by bolt seal.
In the present embodiment, be simplified processing process, be convenient to sealing, the mating area between described pump housing 1-1 and pump cover is plane, is called cooperation plane.This pump housing 1-1 and pump cover enclose the rotor cavity defining accommodating described internal rotor 1-6, external rotor 1-4 and regulating mechanism, and provide the pipeline structure in path for engine oil flow.
Described rotor cavity is be opened in the cavity structure based on cylinder on described pump housing 1-1, this rotor cavity comprise relative, be arranged at bottom surface on described pump housing 1-1 and described pump cover and end face respectively.Described bottom surface and end face are the identical plane structure based on disc, and in the present embodiment, described bottom surface and end face are all parallel coordinates plane with described.
This variable displacement pump is driven by drive unit.Described drive unit drives described internal rotor 1-6 to rotate around the medial axis of this internal rotor 1-6 by live axle (for illustrating in figure).
Described variable displacement pump can comprise live axle, also can not comprise live axle.Namely this live axle is a part for this variable displacement pump, or does not belong to this variable displacement pump.
In the present embodiment, described variable displacement pump does not comprise described live axle, this internal rotor 1-6 is provided with the attachment hole 1-16 with live axle secure fit.The medial axis of this attachment hole 1-16, described internal rotor 1-6 and live axle overlaps.Described internal rotor 1-6 rotates around the medial axis of this internal rotor 1-6 under the driving of live axle.
The fit system of described live axle and described internal rotor 1-6 can be selected according to actual needs.Such as interference fit, flat connection, keyway connection etc.Accordingly, attachment hole 1-16 shape is determined according to fit system.
Described bottom surface and/or the corresponding position of end face also offer the axis hole 2-2 of accommodating described live axle.Described axis hole 2-2 medial axis is perpendicular to described cooperation plane and overlap with the medial axis of described live axle.Described axis hole 2-2 can be designed to through hole and non-through hole according to actual conditions.
Described driving shaft design, live axle and internal rotor 1-6 fit system, the shape of attachment hole 1-16 and the form etc. that arranges of axis hole 2-2 all need to determine according to actual conditions.
In the present embodiment, described variable displacement pump is by engine-driving, and described live axle uses engine crankshaft.This live axle runs through described pump housing 1-1 and described pump cover, adopts flat Placement to be connected with internal rotor 1-6.Described bottom surface and described end face are provided with axis hole 2-2, and are as through hole.
Described internal rotor 1-6 and described external rotor 1-4 cooperatively interacts, the medial axis of described external rotor 1-4 and the axis parallel of described internal rotor 1-6, and distance is e.After described internal rotor 1-6 and external rotor 1-4 is arranged at described rotor cavity, its outer surface is concordant with the described plane that coordinates.
In the present embodiment, described internal rotor 1-6 and external rotor 1-4 is the fit system of internal messing cycloidal gear, and both are the cross section of uniform thickness is circular disc-shaped structure.
Certainly, other can meet the fit form of principle mandates also to can be involute gear cooperation etc.
The gear profile of described internal rotor 1-6 and external rotor 1-4 can form closed working zone, and the area of the working zone that this gear profile surrounds in the plane of the medial axis perpendicular to described internal rotor 1-6 is called useful area.Coordinate feature according to internal rotor 1-6, external rotor 1-4, this working zone is rotated with internal rotor 1-6, and useful area regularly, cyclically-varying.It one week is one-period that described internal rotor 1-6 rotates.
The inswept region of described working zone on described bottom surface and/or described end face is called moving region, and in one-period, moving region is continuum.
In the present embodiment, in the single cycle that described internal rotor and described external rotor coordinate, the concrete Changing Pattern of the useful area of working zone is: certainly engage beginning, useful area is maximum, be called the starting point of moving region, then diminishing by the most greatly, is the front half part of moving region, to minimum, large by minimum change again, until depart from engagement, be moving region terminal, from minimum until departing from engagement process is the latter half part of moving region.Then again engage, one-period terminates.
Pipeline structure is for described machine oil provides the structure in path, and the flow direction of this structural limitations machine oil in described variable displacement pump and position, coordinating described internal rotor 1-6 and external rotor 1-4 to work, is the part of very important composition in variable displacement pump structure.
Described pipeline structure comprises and is positioned at described rotor cavity both sides and the outlet area do not communicated and entrance region.By described working zone and both alternate communication, described variable displacement pump completes and does work to machine oil.
Described entrance region comprises filler opening 1-15, oil inlet passage 1-14 and oil pocket 2-1 is joined in oil-feed.
Described oil-feed is joined oil pocket 2-1 and is opened in the groove structure corresponding to position, moving region on described end face and/described bottom surface.In the present embodiment, this oil-feed is joined oil pocket 2-1 and is symmetrical arranged in described bottom surface and described end face, extends the region that track is close starting point in the front half part of described moving region.
Described filler opening 1-15 is arranged on described pump housing 1-1, and be the entrance that machine oil enters described variable displacement pump, it is provided with outward extending boss on pump housing 1-1.This boss can be connected with other oil pipes are convenient.
Described oil inlet passage 1-14 offers and the groove structure described pump housing 1-1 being communicated with described filler opening 1-15 and oil-feed and joining oil pocket 2-1, and the degree of depth is not less than described internal rotor 1-6 thickness.
Described outlet area comprises oil outlet 1-9, oil discharge passage 1-7 and fuel-displacedly joins oil pocket 2-3, because structure and entrance region are substantially identical, does not introduce.Specifically described fuel-displaced extension track of joining oil pocket 2-3 is one section near terminal in the latter half part of described moving region, and length is certain.Described oil-feed is joined oil pocket 2-1 and is not communicated with on described moving region with fuel-displaced oil suction chamber 2-3.
Described variable displacement pump will regulate self discharge capacity according to outlet area pressure, needs regulating mechanism to control described external rotor 1-4 and completes.
Described regulating mechanism comprises adjustment ring 1-3, fixing tooth section 1-5 and force application device 1-12.
Described adjustment ring 1-3 is arranged at described external rotor 1-4 outer rim, contacts with described external rotor 1-4.This adjustment ring 1-3 is the ring structure matched with described external rotor 1-4 periphery, and its thickness is not more than the thickness of described external rotor 1-4, for being slightly less than in the present embodiment.
Described adjustment ring 1-3 does not form restriction to external rotor 1-4 with the motion of described internal rotor 1-6, and this external rotor 1-4 can rotate around described internal rotor 1-6 medial axis inside described adjustment ring 1-3.Specifically, described adjustment ring 1-3 and described external rotor 1-4 adopts Spielpassung structure.
Described adjustment ring 1-3 all has the segmental arc of certain length to be in described oil discharge passage 1-7 and oil inlet passage 1-14.Known, described adjustment ring 1-3 is all subject to the active force that machine oil hydraulic produces in oil inlet passage 1-14 described in described oil discharge passage and 1-7.
Described adjustment ring 1-3 is provided with adjustment tooth section 3-2, described adjustment tooth section 3-2 is the gear structure of certain radian.In the present embodiment, this adjustment tooth section 3-2 is involute tooth wheel construction.Accordingly, the edge of described pump housing 1-1 upper rotor part cavity is provided with fixing tooth section 1-5 and matches with this adjustment tooth section 3-2.
Described fixing tooth section 1-5 and described adjustment tooth section 3-2 is internal gearing structure, and both numbers of teeth are close.
According to gears meshing feature, when two inside engaged gear structure numbers of teeth are close, relative movement cannot be realized.For overcoming the problems referred to above, described adjustment tooth section 3-2 and described fixing tooth section 1-5 has at least a side to carry out the Interference modification of profile of tooth, removes corresponding Interference point.
Such Interference modification overcomes technology prejudice, first, for ensureing that described external rotor 1-4 is with in described adjustment ring 1-3 movement process, its medial axis and described internal rotor 1-6 medial axis are apart from constant, its movement locus will have strict restriction, make use of the feature of gears meshing accuracy.Secondly, the tooth section number of teeth that normal internal messing relation can make two to cooperatively interact has a long way to go, and takes up space large.Because the motion amplitude of described adjustment ring 1-3 is little, therefore adopts the structure that the number of teeth is close, and carry out Interference modification simultaneously.
Described pump housing 1-1 and fixing tooth section 1-5 adopts fabricated structure.Split type structure can make pump housing 1-1 and fixing tooth section 1-5 separate machined, can improve yield rate like this, and convenient processing, simplified processing process, also can adapt to different variable displacement pump requirements.
Described adjustment ring 1-3 comprises at least one auxiliary projection, this auxiliary projection extends radially outwardly along described adjustment ring, described rotor cavity is provided with the curved-surface structure matched with this auxiliary projection, described auxiliary projection contacts with described rotor cavity curved-surface structure all the time in described adjustment ring 1-3 movement process, isolated described entrance region and described outlet area, ensure the sealing between described entrance region and described outlet area.Auxiliary projection plays sealing and assists described adjustment tooth section 3-2 and fixing tooth section 1-5 to carry out accurately restriction to adjustment ring 1-3 motion path.Position and number can be determined according to actual conditions.
In the present embodiment, region relative with described adjustment tooth section in described adjustment ring is provided with the first auxiliary projection 1-10, the second auxiliary projection 1-11 and the 3rd auxiliary projection 1-13.The described pump housing is provided with curved-surface structure with matching respectively.Namely three auxiliary projection play seal action, limit further again to the movement locus of described adjustment ring.
Described force application device 1-12 coordinates with described adjustment ring 1-3, makes external force suffered by this adjustment ring 1-3 point to position, described outlet area.For ensureing its stable cooperation, in three auxiliary projection on described adjustment ring 1-3, an auxiliary projection is that load is protruding simultaneously, and this load projection coordinates with described force application device 1-12, bears the active force from described force application device 1-12.
In the present embodiment, described load projection is the auxiliary projection in the middle of three auxiliary projection, and namely the second auxiliary projection 1-11 is that load is protruding.For ensureing can to coordinate with described force application device, again can effective sealing and the described adjustment ring 1-3 movement locus of restriction, the protruding 1-11 of described load radially extended length is greater than other two auxiliary projection.
Described force application device 1-12 can be elastic structure.In the present embodiment, this force application device comprises force application rod 3-3, spring 3-4 and spring seat 3-1, and described spring seat 3-1 is fixed on described pump housing 1-1, and described spring 3-4 one end is connected with described spring seat 3-1, and the other end is connected with described force application rod 3-3.
For making spring 3-4 efficiency maximum, described spring 3-4 is parallel to entrance region suffered by described adjustment ring 1-3 and outlet area resultant direction, and namely described force application rod 3-3 action direction is parallel to entrance region suffered by described adjustment ring 1-3 and outlet area resultant direction.Described oil discharge passage 1-7 is provided with safety unloading valve 1-8, causes the infringement to variable displacement pump to prevent outlet passage 1-7 inner engine oil overpressure.
The specific works process of the present embodiment is as follows:
Driven by engine live axle moves.Under the driving of described live axle, described internal rotor 1-6 rotates around the medial axis of this internal rotor 1-6.
Under original state, the periphery of described adjustment ring 1-3 is not enough in the pressure difference of suffered oil discharge passage 1-7 and oil inlet passage 1-14 the elastic force overcoming force application device medi-spring 3-4.Adjustment ring 1-3 is in the rightmost side under the effect of spring 3-4 elastic force.Variable displacement pump works in maximum-displacement conditions.
When engine speed increases, oil discharge passage 1-7 pressure constantly raises thereupon, when the pressure difference of oil discharge passage 1-7 and oil inlet passage 1-14 suffered by adjustment ring 1-3 periphery is greater than spring 3-4 elastic force, adjustment ring 1-3 can relative movement on fixing tooth section 1-5 under the effect of thrust.Described moving region is departed from oil-feed and is joined oil pocket 2-1, and the contact ratio of joining oil pocket 2-1 with oil-feed becomes greatly, diminishes with fuel-displaced contact ratio of joining oil pocket, namely joins by described oil-feed the oil mass that oil pocket 2-1 enters working zone and reduces, thus reduce the discharge capacity that variable displacement pump often transfers out.
When adjustment ring 1-3 arrives the leftmost side, variable pump delivery reaches minimum.
Through overshoot, the pressure of described oil discharge passage 1-7 reduces, and described adjustment ring 1-3 pressure difference is equal with the elastic force of described force application device 1-12, forms a kind of transient equiliblium.Thus reach the object becoming discharge capacity.
If variable displacement pump breaks down, cannot Displacement Regulation change described oil discharge passage 1-7 inner engine oil pressure be caused to continue to raise, when engine oil pressure is elevated to setting, safety unloading valve 1-8 in oil pump opens, complete Unloading Effect, to reduce engine oil pressure, ensure that the outlet area loine pressure of described variable displacement pump is unlikely to too high.。
When engine speed reduces, and variable displacement pump is when small displacement work a period of time, what described adjustment ring 1-3 was subject in oil discharge passage 1-7 and oil inlet passage 1-14 make a concerted effort is not enough to overcome the elastic force of force application device 1-12 medi-spring 3-4, therefore adjustment ring 1-3 offsets to the left under the effect of spring 3-4 elastic force, and namely described adjustment ring 1-3 moves under the cooperation of adjustment tooth section 3-2 and fixing tooth section 1-5.The contact ratio that oil pocket 2-1 is joined in now moving region and described oil-feed diminishes, and the oil mass entering working volumes increases, thus improves variable pump delivery.When suffered by described adjustment ring 1-3, external force reaches balance, variable pump delivery also arrives dynamic equilibrium state.
When adjustment ring 1-3 gets back to original state position, variable pump delivery reaches maximum.
The present embodiment utilizes the change of oil discharge passage pressure control variable pump displacement, and the mode adopting adjustment tooth section and fixing tooth section to coordinate, adjustment action is developed into the relative movement between inside engaged gear, and have employed fabricated structure, reduce difficulty of processing.Shared by adjustment tooth section, adjustment ring periphery ratio is less, and other regions are simple Cylindrical Surfaces Contact, decrease the possibility of internal leakage, and it is very little to take up space, for variable displacement pump smaller volume provides possibility.
Although the application with preferred embodiment openly as above; but it is not for limiting the application; any those skilled in the art are not departing from the spirit and scope of the application; can make possible variation and amendment, the scope that therefore protection domain of the application should define with the application's claim is as the criterion.
Claims (10)
1. a Rotor-type variable pump, comprises the pump housing, pump cover, internal rotor and external rotor,
The described pump housing and described pump cover enclose form accommodating internal rotor, external rotor rotor cavity and provide the pipeline structure in path for working medium, this pipeline structure comprises and is positioned at described rotor cavity both sides and the entrance region do not communicated and outlet area;
At least comprise the working zone that a profile is closed between described internal rotor and described external rotor, move with described internal rotor in described working zone and the area of closed outline changes in movement process; Described working zone and described entrance region and outlet area alternate communication;
Described variable displacement pump is driven by drive unit;
Described variable displacement pump comprises the live axle with described internal rotor secure fit, or described drive unit comprises live axle, described internal rotor is provided with the attachment hole with this live axle secure fit;
Described drive unit is rotated around this internal rotor medial axis by internal rotor described in described drive shaft;
The described pump housing and/or described pump cover relevant position are provided with the axis hole of accommodating described live axle;
It is characterized in that:
Described Rotor-type variable pump comprises adjustment ring, fixing tooth section and force application device;
Described adjustment ring is arranged at described external rotor outer rim, and described external rotor rotates freely around its medial axis in described adjustment ring;
Described adjustment ring is provided with adjustment tooth section, described pump housing relevant position is provided with the described fixing tooth section matched with this adjustment tooth section, described adjustment ring by external force act on the restriction of described fixing tooth section under deflect, described adjustment tooth section and described fixing tooth section matching relationship make internal rotor medial axis described in the line-spacing of external rotor center shaft described in deflection apart from constant;
Described force application device applies to described adjustment ring the power pointing to described outlet area.
2. Rotor-type variable pump according to claim 1, is characterized in that: described adjustment tooth section and/or described fixing tooth section carry out Interference modification, removes the Interference point hindering relative movement.
3. Rotor-type variable pump according to claim 1, it is characterized in that: described adjustment ring comprises at least one auxiliary projection, this auxiliary projection extends radially outwardly along described adjustment ring, described rotor cavity is provided with the curved-surface structure matched with this auxiliary projection, described auxiliary projection contacts with curved-surface structure corresponding on described rotor cavity all the time in described adjustment ring movement process, isolated described entrance region and described outlet area.
4. Rotor-type variable pump according to claim 3, is characterized in that: described adjustment ring comprises the first auxiliary projection, the second auxiliary projection, the 3rd auxiliary projection that are arranged at described adjustment tooth section offside.
5. Rotor-type variable pump according to claim 4, is characterized in that: have an auxiliary projection in three described auxiliary projection simultaneously for bearing the active force of described force application device.
6. Rotor-type variable pump according to claim 1, it is characterized in that: described force application device applied force is elastic force, this force application device comprises force application rod, spring and spring seat, described spring seat is arranged on the described pump housing, and described force application rod is connected with the spring be arranged on described spring seat.
7. Rotor-type variable pump according to claim 6, is characterized in that: described force application rod action direction is parallel to the resultant direction of the hydraulic coupling of described outlet area and entrance region suffered by described adjustment ring.
8. Rotor-type variable pump according to claim 1, is characterized in that: described fixing tooth section and the described pump housing are split-type structural.
9. Rotor-type variable pump according to claim 1, is characterized in that: be inside engaged gear structure between described internal rotor and described external rotor.
10. Rotor-type variable pump according to claim 1, it is characterized in that: described adjustment ring is provided with the load matched with described force application device protruding, this load projection is the protruding structure extended radially outwardly along described adjustment ring, for bearing the active force of described force application device.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410021435.4A CN103759121B (en) | 2014-01-17 | 2014-01-17 | A kind of Rotor-type variable pump |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410021435.4A CN103759121B (en) | 2014-01-17 | 2014-01-17 | A kind of Rotor-type variable pump |
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| CN103759121A CN103759121A (en) | 2014-04-30 |
| CN103759121B true CN103759121B (en) | 2015-12-30 |
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| CN105257969B (en) * | 2015-10-08 | 2017-07-14 | 东风汽车泵业有限公司 | A kind of Rotor-type variable pump |
| CN107061972B (en) * | 2017-06-09 | 2022-05-24 | 湖南机油泵股份有限公司 | Variable displacement rotor pump |
| CN110261091A (en) * | 2019-07-09 | 2019-09-20 | 富奥汽车零部件股份有限公司 | A kind of variable pump dry testing method and device |
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| CN103759121A (en) | 2014-04-30 |
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Effective date of registration: 20190401 Address after: No. 36 Fengshen Avenue, Zhangwan Industrial New Area, Shiyan City, Hubei Province, 442000 Patentee after: Dongfeng Fuao Pump Co.,Ltd. Address before: 442000 Checheng Road, Zhangwan District, Shiyan City, Hubei Province Patentee before: DONGFENG MOTOR PUMP Co.,Ltd. |
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Address after: 442000 No.36, Fengshen Avenue, industrial new area, Zhangwan District, Shiyan City, Hubei Province Patentee after: Fuao Pump (Hubei) Co.,Ltd. Address before: 442000 No.36, Fengshen Avenue, industrial new area, Zhangwan District, Shiyan City, Hubei Province Patentee before: Dongfeng Fuao Pump Co.,Ltd. |
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