CN203703576U - Rotor type variable pump - Google Patents

Rotor type variable pump Download PDF

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Publication number
CN203703576U
CN203703576U CN201420033522.7U CN201420033522U CN203703576U CN 203703576 U CN203703576 U CN 203703576U CN 201420033522 U CN201420033522 U CN 201420033522U CN 203703576 U CN203703576 U CN 203703576U
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CN
China
Prior art keywords
rotor
pump
adjustment ring
variable displacement
displacement pump
Prior art date
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CN201420033522.7U
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Chinese (zh)
Inventor
李耀军
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东风汽车泵业有限公司
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Priority to CN201420033522.7U priority Critical patent/CN203703576U/en
Application granted granted Critical
Publication of CN203703576U publication Critical patent/CN203703576U/en

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Abstract

The utility model provides a rotor type variable pump which comprises a pump body, a pump cover, an inner rotor and an outer rotor. The pump body and the pump cover define a rotor cavity and a pipeline structure, and the pipeline structure comprises an inlet area and an outlet area which are placed on the two sides of the rotor cavity and are not communicated with each other. At least one working area which has a closed outline and is alternatively communicated with the inlet area and the outlet area is included between the inner rotator and the outer rotator. A driving device drives the inner rotor to rotate around the center axis of the inner rotor through a driving shaft. The rotor type variable pump comprises an adjusting ring, a fixing tooth section and a force applying device. The adjusting ring is provided with an adjusting tooth section, and the adjusting ring deflects under the limit of the fixing tooth section through the effect of external force. The rotor type variable pump achieves rotating of the adjusting ring in a gear matching mode. The gear matching part of the adjusting ring is in a small proportion of the periphery of the adjusting ring, other portions of the adjusting ring are in simple circumferential face contact, and therefore the sealing performance of the position of the adjusting ring can be guaranteed easily.

Description

A kind of rotator type variable displacement pump

Technical field

The application relates to a kind of oil hydraulic pump, is specifically related to a kind of rotator type variable displacement 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, thereby has reduced energy loss on the basis that meets job requirement, has improved capacity usage ratio; Reduce the pressure that pump bears simultaneously, thereby extended the working life of oil pump.

Variable displacement pump is the trend of technical development, has occurred now multiple variable displacement pump.

A kind of " the variable rotor engine oil pumps of impeller regulation and control " are disclosed in Chinese invention patent specification CN102095068A.This variable rotor engine oil pump is made up of the pump housing, pump cover, impeller regulation and control ring, external rotor, internal rotor, transmission shaft, spring and safety valve component.Together with the pump housing is bolted with pump cover.In impeller regulation and control ring and the impeller annular distance and spring slotted eye of spring fitting on the pump housing, transmission shaft middle part and internal rotor interference fit, and be installed in the lump together with external rotor in the axis hole of intermediate hole on impeller regulation and control 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 draining 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 to 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 can, according to fuel-displaced cavity pressure reconditioner oil pump delivery, have been realized variable-flow output, but also have a lot of defects:

First, impeller form has solved the problem that becomes discharge capacity, but impeller expanded range is wider, fit dimension is long, more than half circumference of basic covering impeller adjustment ring, 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 coordinating with impeller are random special surface, the special numerically controlled processing equipment manufacturing of needs, and processing technology complexity, cost are high.

Again, the adjusting of impeller form will guarantee to regulate steadily, need to have larger length of thread engagement, makes the required space occupying of impeller adjustment ring very large, makes this rotator type variable displacement pump entirety take up space larger.

Summary of the invention

The application provides a kind of rotator type variable displacement pump, to solve internal leakage in prior art, processed complex and the large problem that takes up space.

The application provides a kind of rotator type variable displacement pump, and this rotator type variable displacement pump comprises the pump housing, pump cover, internal rotor and external rotor,

The described pump housing and described pump cover enclose and form the rotor cavity of accommodating internal rotor, external rotor and be positioned at described rotor cavity both sides and the entrance region not communicating and outlet area for working medium provides the pipeline structure in path, this pipeline structure to comprise;

Between described internal rotor and described external rotor, at least comprise the working zone of a profile sealing, described working zone changes in movement process with the area of described internal rotor motion and closed outline; Described working zone is alternately communicated with described entrance region and outlet area;

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, is provided with the attachment hole with this live axle secure fit on described internal rotor;

Described drive unit rotates 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 rotator type variable displacement 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 adjusts tooth section, described pump housing relevant position is provided with the described fixing tooth section matching with this adjustment tooth section, described adjustment ring is subject to deflection under the restriction of the described fixing tooth section of acting on of external force, and described adjustment tooth section and described fixing tooth section matching relationship make described in the line-spacing of external rotor center shaft described in deflection internal rotor medial axis distance constant;

Described force application device applies the power of pointing to described outlet area to described adjustment ring.

Optionally, described adjustment tooth section and/or described fixing tooth section are carried out Interference modification, remove the Interference point that hinders relative movement.

Optionally, in described adjustment ring, comprise at least one auxiliary projection, this auxiliary projection extends radially outwardly along described adjustment ring, on described rotor cavity, be provided with the curved-surface structure matching with this auxiliary projection, described auxiliary projection contacts with corresponding curved-surface structure 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, in three described auxiliary projection, there is an 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 being arranged on described spring seat.

Optionally, described force application rod action direction is parallel to the resultant direction of the hydraulic coupling of the suffered described outlet area of described adjustment ring and entrance region.

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, be provided with the load projection matching with described force application device in described adjustment ring, the protruding structure of this load projection for extending 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 rotator type variable displacement pump that the application provides adopts gear fit system to complete the rotation of adjustment ring, the gear mating part of adjustment ring only occupy adjustment ring periphery compared with small scale, other positions are simple circumference contact, and the sealing of adjustment ring position is easily guaranteed.

Secondly, the rotator type variable displacement pump providing due to the application adopts gear fit system to complete the rotation of adjustment ring, and the processing technology maturation of gear structure, without special equipment and specialized designs, has significantly reduced processing cost.

Again, the ratio that the gear parts of the adjustment ring of this rotator type variable displacement pump occupies adjustment ring periphery is less, make the occupied space of adjustment ring entirety much smaller than wave wheel type adjustment ring, and then make the overall structure of this rotator type variable displacement pump easily be easier to miniaturization, for the arrangement of other devices that coordinate with these parts provides more space.

Preferably, the application adopts removal Interference point method to carry out Interference modification, removes corresponding Interference point for the approaching adjustment tooth section of the number of teeth and fixing tooth section, and the approaching internal gearing structure of the number of teeth can be moved mutually.This method has overcome technology prejudice, and the principle that adopts gear to engage, has guaranteed the movement locus of described adjustment ring in deflection, makes the medial axis of described external rotor remain constant apart from the medial axis distance of described internal rotor.

Preferably, rotator type variable displacement pump provided by the invention is provided with at least one auxiliary projection with described adjustment tooth section to side position in described adjustment ring, and this auxiliary projection extends radially outwardly along described adjustment ring.On described, be provided with the curved-surface structure matching with this auxiliary projection, described auxiliary projection contacts with corresponding surface structure on described rotor cavity all the time in described adjustment ring movement process, 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, internal rotor medial axis distance remains constant described in described external rotor center shaft line-spacing.

Further preferred, rotator type variable displacement 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, on described rotor cavity, be provided with three curved-surface structures correspondence with it.Three auxiliary projection are fitted with corresponding curved-surface structure sealing all the time in described adjustment ring process, have further strengthened 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 embodiment's that provides of the application schematic diagram.

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 explanation:

Note: numeral figure number before example sequence number whippletree herein, the sequence number after whippletree in this figure of numeral.The first example in example 2-1 presentation graphs 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, 1-10: the first auxiliary projection, 1-11: the second auxiliary projection (effect projection), 1-12: force application device, 1-13: the 3rd 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: the fuel-displaced oil pocket of joining;

3-1: spring seat, 3-2: adjust tooth section, 3-3: force application rod, 3-4: spring.

Embodiment

A lot of details are set forth in the following description so that fully understand the application.But the application can implement to be much different from alternate manner described here, and those skilled in the art can do similar popularization without prejudice to the application's intension in the situation that, and therefore the application is not subject to the restriction of following public concrete enforcement.

Fig. 1 to Fig. 3 shows the embodiment of a kind of rotator type variable displacement pump that the application provides.The rotator type variable displacement pump of the present embodiment is the power unit as vehicle lubricating system for motor car engine, is therefore called again in the present embodiment change displacement oil pump, is called for short variable displacement pump, and working medium is wherein machine oil.Certainly, the rotator type variable displacement 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, for variable displacement pump component provide mounting point and install and support.

Described pump housing 1-1 and described pump cover cooperatively interact, and corresponding position offers tapped hole (as tapped hole 1-2), connects 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 that has formed 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 be opened on described pump housing 1-1 take cylinder as basic cavity structure, that this rotor cavity comprises is relative, be arranged at respectively bottom surface and the end face on described pump housing 1-1 and described pump cover.Described bottom surface and end face are identical take disc as basic plane structure, and in the present embodiment, described bottom surface and all parallel and described planes that coordinates of end face.

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 (being to illustrate in figure).

Described variable displacement pump can comprise live axle, also can not comprise live axle.The part that this live axle is this variable displacement pump, or do not belong to this variable displacement pump.

In the present embodiment, described variable displacement pump does not comprise described live axle, is provided with the attachment hole 1-16 with live axle secure fit on this internal rotor 1-6.The medial axis of this attachment hole 1-16, described internal rotor 1-6 and live axle overlaps.Described internal rotor 1-6 rotates the medial axis around 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.

The corresponding position of described bottom surface and/or end face also offers the axis hole 2-2 of accommodating described live axle.Described axis hole 2-2 medial axis overlaps perpendicular to described cooperation plane and 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.

Design, live axle and internal rotor 1-6 fit system, the shape of attachment hole 1-16 and the forms that arrange of axis hole 2-2 etc. of described live axle all need to determine according to actual conditions.

In the present embodiment, described variable displacement pump is by engine-driving, and described live axle is used 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.On described bottom surface and described end face, be provided with axis hole 2-2, and be as through hole.

Described internal rotor 1-6 and described external rotor 1-4 cooperatively interact, and the medial axis of described external rotor 1-4 is parallel with the medial axis of described internal rotor 1-6, and distance is e.Described internal rotor 1-6 and external rotor 1-4 are arranged at after described rotor cavity, and 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 are the fit system of interior engagement cycloidal gear, and the cross section that both are uniform thickness is circular disc-shaped structure.

Certainly other can meet the fit form that principle requires, also to can be involute gear cooperation etc.

The gear profile of described internal rotor 1-6 and external rotor 1-4 can form the working zone of sealing, 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.According to internal rotor 1-6, external rotor 1-4 coordinate feature known, this working zone with internal rotor 1-6 rotate, 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 engagement, and useful area 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, become large by minimum again, until depart from engagement, be moving region terminal, from minimum until depart from the latter half part that engagement process is moving region.Then engagement again, one-period finishes.

Pipeline structure is the structure that path is provided for described machine oil, and the flow direction and the position of this structural limitations machine oil in described variable displacement pump coordinates described internal rotor 1-6 and external rotor 1-4 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 not communicating and entrance region.By described working zone and both be alternately communicated with, described variable displacement pump completes machine oil is done work.

Described entrance region comprises that filler opening 1-15, oil inlet passage 1-14 and oil-feed join oil pocket 2-1.

Described oil-feed join oil pocket 2-1 be opened in described end face and/described bottom surface on corresponding to the groove structure of position, moving region.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, and extending track is the region near starting point in the front half part of described moving region.

It is upper that described filler opening 1-15 is arranged at described pump housing 1-1, is the entrance that machine oil enters described variable displacement pump, and 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 that is communicated with described filler opening 1-15 and oil-feed on described pump housing 1-1 and joins 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 the fuel-displaced oil pocket 2-3 that joins, due to structure and entrance region basic identical, do not introduce.Need special instruction, described fuel-displaced extension track of joining oil pocket 2-3 be in the latter half part of described moving region near a section of terminal, length is certain.Oil pocket 2-1 is joined in described oil-feed and fuel-displaced oil suction chamber 2-3 is not communicated with on described moving region.

Described variable displacement pump will regulate self discharge capacity according to outlet area pressure, needs external rotor 1-4 described in regulating mechanism control to complete.

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 matching with described external rotor 1-4 periphery, and its thickness is not more than the thickness of described external rotor 1-4, in the present embodiment for being slightly less than.

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 in described adjustment ring 1-3 inner side.Particularly, described adjustment ring 1-3 and described external rotor 1-4 adopt Spielpassung structure.

Described adjustment ring 1-3 all has the segmental arc of certain length 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.

On described adjustment ring 1-3, be provided with and adjust tooth section 3-2, the gear structure that described adjustment tooth section 3-2 is 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 are internal gearing structure, and both numbers of teeth are close.

Known according to gear engagement feature, in the time that two inside engaged gear structure numbers of teeth are close, cannot realize relative movement.For overcoming the problems referred to above, described adjustment tooth section 3-2 and described fixing tooth section 1-5 have at least a side to carry out the Interference modification of profile of tooth, remove corresponding Interference point.

Such Interference modification has overcome technology prejudice, first,, for guaranteeing that described external rotor 1-4 is in described adjustment ring 1-3 movement process, its medial axis and described internal rotor 1-6 medial axis distance are constant, its movement locus will have strict restriction, has utilized the feature of gear engagement accuracy.Secondly, normal interior meshing relation can make two tooth section numbers of teeth that cooperatively interact have a long way to go, and takes up space large.Because the motion amplitude of described adjustment ring 1-3 is little, therefore adopt 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 adopt fabricated structure.Split type structure can make pump housing 1-1 and fixing tooth section 1-5 separate machined, can improve like this yield rate, and convenient processing, simplified processing process, also can adapt to different variable displacement pump requirements.

On described adjustment ring 1-3, comprise at least one auxiliary projection, this auxiliary projection extends radially outwardly along described adjustment ring, on described rotor cavity, be provided with the curved-surface structure matching 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, guarantee the sealing between described entrance region and described outlet area.Auxiliary projection plays a part to seal and assist 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, in described adjustment ring, the region division relative with described adjustment tooth section has the first auxiliary projection 1-10, the second auxiliary projection 1-11 and the 3rd auxiliary projection 1-13.On the described pump housing, be provided with curved-surface structure with matching respectively.Three auxiliary projection play seal action, further the movement locus of described adjustment ring are limited again.

Described force application device 1-12 coordinates with described adjustment ring 1-3, makes the suffered external force of this adjustment ring 1-3 point to position, described outlet area.For guaranteeing its stable cooperation, in three auxiliary projection on described adjustment ring 1-3, an auxiliary projection is load projection 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 the second auxiliary projection 1-11 is load projection.For guaranteeing 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 it is upper that 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 the suffered entrance region of described adjustment ring 1-3 and outlet area resultant direction, and described force application rod 3-3 action direction is parallel to the suffered entrance region of 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:

The motion of driven by engine live axle.Under the driving of described live axle, described internal rotor 1-6 is around the rotation of the medial axis of this internal rotor 1-6.

Under original state, the periphery of described adjustment ring 1-3 is not enough to overcome the elastic force of force application device medi-spring 3-4 in the pressure difference of suffered oil discharge passage 1-7 and oil inlet passage 1-14.Adjustment ring 1-3 under the effect of spring 3-4 elastic force in the rightmost side.Variable displacement pump is worked under maximum pump discharge state.

In the time that engine speed increases, oil discharge passage 1-7 pressure constantly raises thereupon, when the pressure difference of the suffered oil discharge passage 1-7 of adjustment ring 1-3 periphery and oil inlet passage 1-14 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 large, diminishes with fuel-displaced contact ratio of joining oil pocket, joins by described oil-feed the oil mass that oil pocket 2-1 enters working zone and reduces, thereby reduced the discharge capacity that variable displacement pump often transfers out.

In the time that adjustment ring 1-3 arrives the leftmost side, it is minimum that variable pump delivery reaches.

Through overshoot, the pressure decreased of described oil discharge passage 1-7, the elastic force of the poor and described force application device 1-12 of described adjustment ring 1-3 pressure equates, forms a kind of transient equiliblium.Thereby reach the object that becomes discharge capacity.

If variable displacement pump breaks down, cannot Displacement Regulation variation cause described oil discharge passage 1-7 inner engine oil pressure to continue to raise, in the time that engine oil pressure is elevated to setting, safety unloading valve 1-8 in oil pump opens, complete Unloading Effect, to reduce engine oil pressure, guarantee 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 in the time of small displacement work a period of time, the elastic force of what described adjustment ring 1-3 was subject in oil discharge passage 1-7 and oil inlet passage 1-14 make a concerted effort to be not enough to overcome force application device 1-12 medi-spring 3-4, therefore adjustment ring 1-3 skew to the left under the effect of spring 3-4 elastic force, described adjustment ring 1-3 moves under the cooperation of adjusting 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 that enters work cavity volume increases, thereby has improved variable pump delivery.In the time that the suffered external force of described adjustment ring 1-3 reaches balance, variable pump delivery also arrives dynamic equilibrium state.

In the time that adjustment ring 1-3 gets back to original state position, it is maximum that variable pump delivery reaches.

The present embodiment utilizes the variation of oil discharge passage pressure controlled variable pump displacement, and adopts the mode of adjusting tooth section and the cooperation of fixing tooth section, will regulate action to develop into the relative movement between inside engaged gear, and has adopted fabricated structure, has reduced difficulty of processing.Adjust the shared adjustment ring periphery of tooth section ratio less, other regions are simple Cylindrical Surfaces Contact, reduced the possibility of internal leakage, and it are 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 application's spirit and scope; can make possible variation and modification, the scope that therefore the application's protection domain should be defined with the application's claim is as the criterion.

Claims (10)

1. a rotator type variable displacement pump, comprises the pump housing, pump cover, internal rotor and external rotor,
The described pump housing and described pump cover enclose and form the rotor cavity of accommodating internal rotor, external rotor and be positioned at described rotor cavity both sides and the entrance region not communicating and outlet area for working medium provides the pipeline structure in path, this pipeline structure to comprise;
Between described internal rotor and described external rotor, at least comprise the working zone of a profile sealing, described working zone changes in movement process with the area of described internal rotor motion and closed outline; Described working zone is alternately communicated with described entrance region and outlet area;
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, is provided with the attachment hole with this live axle secure fit on described internal rotor;
Described drive unit rotates 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 rotator type variable displacement 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 adjusts tooth section, described pump housing relevant position is provided with the described fixing tooth section matching with this adjustment tooth section, described adjustment ring is subject to deflection under the restriction of the described fixing tooth section of acting on of external force, and described adjustment tooth section and described fixing tooth section matching relationship make described in the line-spacing of external rotor center shaft described in deflection internal rotor medial axis distance constant;
Described force application device applies the power of pointing to described outlet area to described adjustment ring.
2. rotator type variable displacement pump according to claim 1, is characterized in that: described adjustment tooth section and/or described fixing tooth section are carried out Interference modification, removes the Interference point that hinders relative movement.
3. rotator type variable displacement pump according to claim 1, it is characterized in that: in described adjustment ring, comprise at least one auxiliary projection, this auxiliary projection extends radially outwardly along described adjustment ring, on described rotor cavity, be provided with the curved-surface structure matching with this auxiliary projection, described auxiliary projection contacts with corresponding curved-surface structure on described rotor cavity all the time in described adjustment ring movement process, isolated described entrance region and described outlet area.
4. rotator type variable displacement 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. rotator type variable displacement pump according to claim 4, is characterized in that: in three described auxiliary projection, have an auxiliary projection simultaneously for bearing the active force of described force application device.
6. rotator type variable displacement 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 being arranged on described spring seat.
7. rotator type variable displacement 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 the suffered described outlet area of described adjustment ring and entrance region.
8. rotator type variable displacement pump according to claim 1, is characterized in that: described fixing tooth section and the described pump housing are split-type structural.
9. rotator type variable displacement pump according to claim 1, is characterized in that: between described internal rotor and described external rotor, be inside engaged gear structure.
10. rotator type variable displacement pump according to claim 1, it is characterized in that: in described adjustment ring, be provided with the load projection matching with described force application device, the protruding structure of this load projection for extending radially outwardly along described adjustment ring, for bearing the active force of described force application device.
CN201420033522.7U 2014-01-17 2014-01-17 Rotor type variable pump CN203703576U (en)

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CN201420033522.7U CN203703576U (en) 2014-01-17 2014-01-17 Rotor type variable pump

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Application Number Priority Date Filing Date Title
CN201420033522.7U CN203703576U (en) 2014-01-17 2014-01-17 Rotor type variable pump

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CN203703576U true CN203703576U (en) 2014-07-09

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103759121A (en) * 2014-01-17 2014-04-30 东风汽车泵业有限公司 Rotor-type variable pump

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103759121A (en) * 2014-01-17 2014-04-30 东风汽车泵业有限公司 Rotor-type variable pump
CN103759121B (en) * 2014-01-17 2015-12-30 东风汽车泵业有限公司 A kind of Rotor-type variable pump

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