The application is the PCT international application of the U.S. Provisional Application submitted on April 10th, 2007 number 60/922,683.More than Shen Qing disclosure content is combined in this by reference.
Description of drawings
From detailed explanation and the following drawings, will obtain the present invention is more fully understood, in the accompanying drawings:
Fig. 1 is a side cross-sectional view according to a sliding blade pump of the present invention, and internal rotor wherein aligns with external rotor;
Fig. 2 is a side cross-sectional view of a sliding blade pump, and external rotor wherein departs from from internal rotor;
Fig. 3 is the decomposition view according to sliding blade pump of the present invention;
Fig. 4 be according to the present invention in the sliding blade pump perspective view of an employed blade;
Fig. 5 be according to the present invention in the sliding blade pump side view of an employed blade;
Fig. 6 be according to the present invention in the sliding blade pump perspective view of an employed wheel hub and internal rotor;
Fig. 7 is that its middle cover and housing are removed according to the perspective view of an alternate embodiment of sliding blade pump of the present invention;
Fig. 8 is the perspective view according to an employed rotor in the alternate embodiment of sliding blade pump of the present invention;
Fig. 9 is first decomposition view according to an alternate embodiment of sliding blade pump of the present invention; And
Figure 10 is second decomposition view according to an alternate embodiment of sliding blade pump of the present invention.
Embodiment
Below the explanation of one or more preferred embodiments only be exemplary in itself and be intended to limit the present invention, its application or purposes absolutely not.
Referring to these accompanying drawings, represent with 10 generally generally according to a sliding blade pump of the present invention.Pump 10 has an internal rotor 12, and this internal rotor is around 14 rotations of a first axle.Internal rotor 12 also has a series of slit 16 that is used to hold a plurality of blades 18.These blades 18 have one first side 20, and this first side and one second side 22 depart from and be in parallel.These blades 18 have also that one the 3rd side, 21, the three sides are parallel to one the 4th side 23 and compare with it and equate with it on length.The 3rd side 21 and the 4th side 23 are all as a flat mating face 24.Blade 18 also comprises an extension part 26, and this extension part of comparing with the remaining part of blade 18 has a width that reduces.Pump 10 also has an external rotor 28, and this external rotor is around 30 rotations of one second axis, and has a plurality of depressions 32 of the flat engagement 24 that is used to hold these blades 18.
Be biased first side 20 of leaving second side 22 and producing an angle 27 between these flat engagement 24 and first side 20 and between these flat engagement 24 and second side 22.In these depressions 32 and these flat engagement 24 each is in sliding contact.Fig. 4 and Fig. 5 have described independent example of one of these blades 18.
Around external rotor 28 are eccentric hoops 34 that are positioned in the housing 36.An extendible chamber 38 that is used for pumping fluid is positioned between internal rotor 12 and the external rotor 28.Housing 36 also comprises an input port 40, and this input port is used for fluid is sent among the extendible chamber 38; And an output port 42, this output port is used to receive the fluid from extendible chamber 38.Also have an inlet opening 43 that is in fluid communication with input port 40, wherein fluid was admitted to input port 40 via inlet opening 43 before by pump 10 pumpings.Also there is an exit orifice 45 that is in fluid communication with output port 42; In case this fluid is by pump 10 pumpings, this fluid passes exit orifice 45 from output port 42 and arrives a device that needs pressure fluid.
Eccentric hoop 34 comprises a flange 44, a pivot hole 46 and is accommodated in a pivot pin 47 in the pivot hole 46.Pivot hole 46 is connected to eccentric hoop 34 on the housing 36 with pivot pin 47, so that allowable offset ring 34 pivots around pivot pin 47.Flange 44 also is connected on the biasing mechanism (as a spring on a side, an and piston on opposition side), make capable being applied on the flange 44 like this, thereby change the degree of eccentricity between internal rotor 12 and the external rotor 28, will do more clearly explanation to its function after a while.
Be in operation, internal rotor 12 is attached on the wheel hub 48 and by its driving.Internal rotor 12 rotates and these blades 18 is applied power and drive these blades.The flat engagement 24 of first end 20 and second end 22 is applied to power on these depressions 32 of external rotor 28 then.Because these depressions 32 are with an angular positioning, this angle is identical with the angle 27 of these blades 18, these depressions 32 are alignd with these flat engagement 24 and contacts, 32 apply power thereby allow these flat engagement 24 that these are caved in, and driving external rotor 28.External rotor 28 is allowed to rotate with respect to eccentric hoop 34, because a fluid dynamic shaft bearing 50 is in the two location.Fluid dynamic shaft bearing 50 in this embodiment is fluid dynamic films, and this film makes the minimise friction between external rotor 28 and the eccentric hoop 34.Yet, fluid dynamic shaft bearing 50 can also be a ball bearing, a kind of lubricating grease or can reduce external rotor 28 and eccentric hoop 34 between any other device of friction.
Pump 10 has the ability to change the value that is pumped into the fluid of output port 42 from input port 40.When pump 10 was in the position shown in Figure 1, the first axle 14 of internal rotor 12 alignd with second axis 30 of external rotor 28.When first axle 14 aligns with second axis 30, there is not fluid to transfer to output port 42 from input port 40.When flange 44 is applied power, eccentric hoop 34 will pivot around the pivot pin 47 that is arranged in pivot hole 46.Along with eccentric hoop 34 pivots, external rotor 28 will together move.External rotor 28 can be moved to a maximum position shown in Figure 2.In this position, fluid will from input port 40 be inhaled into the extendible chamber 38 and these blades 18 in each between, this is that the position of external rotor 28 and extendible chamber 38 has produced a kind of suction force because move when crossing input port 40 when internal rotor 12 and external rotor 29 rotations and these blades 18.
When internal rotor 12, external rotor 14 and these blades 18 continue rotation, the value of the fluid in extendible chamber 38 will reach a maximum capacity, and extendible then chamber 38 will begin to compress this fluid.When internal rotor 12 during with external rotor 28 rotations, the fluid between these blades 18 will further be compressed in extendible chamber 38, and these blades 18 move and cross output port 42.Contraction between fluid each in these blades 18 will force this fluid through output port 42.In order to compensate the variation of the degree of eccentricity between external rotor 28 and the internal rotor 12, the flat engagement 24 of these blades 18 is allowed to slide in these depressions 32, will be transferred on the external rotor 28 by rotating force simultaneously.
The another aspect of the present invention that a plurality of advantages that are better than former vane pump are provided is that these blades 18 are to be in a kind of " stacking " configuration (it sees the most clearly in Fig. 3).As previously mentioned, each blade 18 has an extension part 26 of a part that forms each blade 18.The width of each extension part 26 is narrower than the overall width of blade 18.Each extension part 26 also is positioned in along in the different position of the width of blade 18.This just allows these blades 18 " to stack " together, thereby allows all these blades 18 to be inserted in the corresponding slit 16 in the internal rotor 12.In this specific embodiment, there are 18: one first blades of four blades 52, one second blade 54, the 3rd blade 56 and a quaterfoil 58.
As in Fig. 3 as seen, the extension part 26 of extension part 26 contiguous the 3rd blades 56 of extension part 26, the second blades 54 of the extension part of first blade 52 26 contiguous second blades 54, and the extension part 26 of the extension part 26 contiguous quaterfoils 58 of the 3rd blade 56.Each extension part 26 is close each other, but is in a different angle toward each other, because each blade 18 is positioned in the corresponding slit 16 in the internal rotor 12.
As described above, the invention is not restricted to have four blades 18.The number that can change blade 18 is to be fit to require any concrete application of sliding blade pump 10 of the present invention.In the present embodiment because four blades 18 are arranged, so the width of each extension part 26 be each blade 18 overall width about 25%.If use more or less blade 18, then the width of extension part 26 will change pro rata.For example, if use six blades, then each extension part will be blade 18 overall width 1/6; If use two blades 18, then the width of each extension part 26 will be half of overall width of blade 18.
The present invention has the sliding blade pump that is better than other types and several advantages of hinge joint vane pump.Sliding blade pump 10 of the present invention has fewer purpose blade 18, but still works effectively and have higher volumetric efficiency.Equally, these blades 18 with flat engagement 24 (mode by the present invention explanation drives external rotor 28) have reduced the abrasion amount on these flat engagement 24 and external rotor 28, and the value of the contact stress when comparing with the sliding blade pump of routine on these blades 18 also is reduced.Between the flat engagement 24 of these blades 18 and these depressions 32, engages the ability of charge pump 10 when startup also is provided.This has saved extra parts (for example guided rings and/or be used to the oil pressure spare of the sliding blade pump of prime typical).In manufacture process, pump 10 of the present invention also is convenient to easier assembling, and is more efficient aspect encapsulation.The structure of the integration of these blades 18 is also eliminated or has been reduced centrifugal action.Because these blades 18 are transient equiliblium more, thereby noise, vibration and roughness (NVH) be improved, and exist the tolerance of enhancing for the pollution that can hinder performance.
Fig. 7 to Figure 10 shows an alternate embodiment of the present invention, wherein identical numeral components identical.Comprise at the pump shown in Fig. 7 to Figure 10 10 and the internal rotor of a straddle support to illustrate generally with 60.Internal rotor 60 also comprises a series of slit 62.Yet these slits 62 of this embodiment are different from the first embodiment part and are, two slits in these slits 62 are slits 64 of elongation, and two slits in these slits 62 are not the slits 66 of elongation.Internal rotor 60 also comprises two hub portions 68 and a series of blade rack 70, and these blade racks are used to support a series of blades.
In the present embodiment, two blades in these blades are multi-part type blades 76, and two blades in these blades are single-piece blades 78.These single-piece blades 78 respectively to first embodiment in first blade 52 similar with quaterfoil 58.Multi-part type blade 76 is similar with second blade 54 and the 3rd blade 56 respectively, except these multi-part type blades 76 are divided into two parts.These extension parts 26 are divided into two halves.
In assembling process, these multi-part type blades 76 are inserted in the slit 66 of these non-elongations, and these single-piece blades 78 are inserted in the slit 64 of these elongations.The function in the slit 64 of these elongations remains to be allowed these single-piece blades 78 to be inserted into by internal rotor 60.Or rather, these elongated slots 64 allow the wideest part of blades 78 to be inserted into by rotor 60, need not by from any interference of the extension part 26 of any other blade and locked or accept.In case these multi-part type blades 76 and these single-piece blades 78 are inserted in these slits 62, rotor 60 is inserted in the external rotor 28 in the mode that is similar to previous embodiment.These blades also will engage these depressions 32 of external rotor 28 in the mode that is similar to this first embodiment.
In case all these blades all are inserted in these slits 62, then housing 36 will prevent that these blades from sliding into outside these slits 62 because the internal surface of housing 36 will with these blades in each be in sliding contact.
Internal rotor 60 is supported on the both sides of these blade racks 70 by these hub portions 68; This provides extra support structure and has allowed pump 10 that the pressure capability of increase is arranged.Internal rotor 60 is to be driven by axle, and rotor 60 rotates and power is applied on these blades, and these blades and then power is applied to these depressions 32, external rotor 60 is driven in a kind of similar mode thereby compare with this previous embodiment.
In order to change the value of the fluid that is pumped in this embodiment of the present invention, flange 44 is inserted in the depression 80 of piston 82.Piston 82 comprises a hollow part 84, and this hollow parts receives the part of a Returnning spring 86.Be a flat section 88 on the opposition side of piston 82, it receives the pressure from fluid.When the hydrodynamic pressure on the flat section 88 of piston 82 when imposing on the pressure of piston 82 by Returnning spring 86, piston 82 will move to the right of seeing on Fig. 7, and eccentric hoop 34 will be pivoting with the identical mode of previous embodiment, and the value of the fluid that is pumped will reduce.As shown in Figure 7, when the hydrodynamic pressure on the piston 82 is released, the power that is imposed on piston 82 by Returnning spring 86 will make eccentric hoop 34 get back to its original position to increase discharge capacity, and this is the default location that is used for eccentric hoop 34, and wherein first axle 14 aligns with second axis 30.
Explanation of the present invention only is exemplary in itself and the variant that therefore do not deviate from main points of the present invention is intended to be within the scope of the present invention.This class variant must not be considered to depart from the spirit and scope of the invention.