CN1576595A - Oil hydraulic pump - Google Patents
Oil hydraulic pump Download PDFInfo
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- CN1576595A CN1576595A CN 200410061758 CN200410061758A CN1576595A CN 1576595 A CN1576595 A CN 1576595A CN 200410061758 CN200410061758 CN 200410061758 CN 200410061758 A CN200410061758 A CN 200410061758A CN 1576595 A CN1576595 A CN 1576595A
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Abstract
The invention provides a hydraulic pump capable of preventing leak oil from leaking to the outside due to the breakage of a seal member even when the amount of the leak oil is increased while securing lubricity between bushes and a drive shaft. This hydraulic pump comprises a pump housing 3 in which a through-hole 3a is formed, a pump unit 1 installed between the pump housing 3 and a pump cover 2, the drive shaft 15 pivotally supported in the through-hole 3a through the bushes 13 and 14, a seal chamber 11 formed at the end of the through-hole 3a, and the seal member 12. Also, the hydraulic pump comprises a first oil groove Y1 formed between the drive shaft 15 and the bushes 13 and 14 and allowed to communicate with the seal chamber 11 from the pump unit side of the through-hole 3a, a second oil groove Y2 allowed to communicate with the seal chamber 11 from the pump unit side of the through-hole 2a so as to avoid the first oil groove Y1, and a communication passage 19 communicating from the seal chamber 11 to the low-pressure side (low-pressure chamber 3c) of the pump unit 1.
Description
Technical field
The present invention relates to a kind of oil pressure pump that is applicable to the power source of motor turning power assisting device etc.
Background technique
In the prior art, this type of oil pressure pump constitutes by receive the armored pump element between pump case and pump cover, and live axle supports via lining and is arranged in the through hole that connects aforementioned pump case.
In addition, common aforementioned oil pressure pump will be followed the running of pump element and leakage of oil in the through hole that bleeds is used as the lubricant oil of live axle.
Therefore, form the helical oil groove on the internal surface of said sleeve, by making aforementioned leakage of oil flow through this oil groove it is imported in the closed chamber, to seek to improve the lubricity between lining and the live axle, this oil pressure pump technology is well-known (with reference to patent documentation 1).
In addition, forming oil groove between said sleeve and through hole also is well-known (referring to Patent Document 2) with the technology of seeking same effect.
Japan is real open clear 63-143786 communique (the 1-3 page or leaf, Fig. 1)
Japanese kokai publication hei 11-13670 communique (the 1-3 page or leaf, Fig. 1)
; in the invention of aforementioned patent document 1; under the situation that aforementioned leakage of oil increases; the flow velocity that flows through the leakage of oil of aforementioned oil groove can be accelerated; its stress can surpass the exclusion seal ability of sealed member; its result can make the sealed member breakage, exists the problem of leakage of oil from the danger that drains to the pump case outside between sealed member and the live axle.
In addition, when the flow velocity that flows through the leakage of oil of aforementioned oil groove was accelerated, the load that lining bore also can increase, and therefore can reduce the durability of this lining.
In addition, the open end of the closed chamber side of aforementioned oil groove becomes the structure that is subjected to easily by the stress of leakage of oil flow velocity generation in the face of the lip of sealed member.
In addition, in the invention of patent documentation 2, because leakage of oil can not be penetrated between lining and the live axle fully, thereby the problem that live axle can not obtain desired lubricity has appearred.
Summary of the invention
The present invention is conceived to the problems referred to above and finishes, its objective is provides a kind of oil pressure pump, this oil pressure pump can be guaranteed the lubricity between lining and the live axle, and also can sealed member is damaged and prevent trouble before it happens to the situation of external leaks under the situation that leakage of oil increases.
First aspect present invention is a kind of oil pressure pump, it is characterized by, and has: the pump case that is formed with through hole; Pump cover with aforementioned pump case combination; Receipts are loaded on the pump element between aforementioned pump case and the pump cover; Be located at the lining of aforementioned through hole; Be supported in the live axle in the said sleeve; Be arranged at the closed chamber of aforementioned through hole end; Be arranged at the sealed member in the aforementioned closed chamber, the sealing parts are with exclusion seal between aforementioned pump case and the live axle; The 1st oil groove is arranged between aforementioned live axle and the lining, and is communicated with from the pump element lateral seal chamber of aforementioned through hole, will import closed chamber from the sealing oil that this pump element drains to the through hole; The 2nd oil groove from the pump element lateral seal chamber connection of aforementioned pump bushing, will be avoided aforementioned the 1st oil groove and import closed chamber from the leakage of oil that this pump element drains to the through hole; The 1st communication passage is communicated with from the low voltage side of aforementioned closed chamber to pump element, and reclaims the leakage of oil in the sealing chamber.
Therefore, in the oil pressure pump of the present invention,, between live axle and lining, played the effect of lubricant oil, consequently obtained the good lubricity of live axle because the leakage of oil from the pump element side leakage to through hole flows into the 1st oil groove.
In addition, owing to aforementioned leakage of oil is branched off into the 1st oil groove and two streams of the 2nd oil groove are imported in the closed chamber,, can not that leakage of oil all flows into the 1st oil grooves so even when this leakage of oil amount increases, the 2nd oil groove can become the bypass passageways of the 1st oil groove.
Therefore, compare,, reduce its flow velocity, therefore can prevent because the lining that stress caused of this leakage of oil and the breakage of sealed member because the amount of the leakage of oil that flows into the 1st oil groove is reduced with existing invention.
Second aspect present invention is the oil pressure pump that first aspect present invention is put down in writing, it is characterized by, aforementioned sealed member has the lip that is arranged on the slip surface place of aforementioned live axle, and aforementioned the 2nd oil groove is arranged at the position that the lip with aforementioned sealed member staggers diametrically with the open end of the closed chamber side of the 2nd oil groove.
According to second aspect present invention, lip is directly clashed in the leakage of oil that can avoid being imported into the 2nd oil groove fiercely, reduces the unnecessary stress to this lip, can improve the durability of sealed member.
Third aspect present invention is the oil pressure pump of first aspect record, it is characterized by, said sleeve is made of the 1st lining of the closed chamber side of spaced apart predetermined distance and the 2nd lining of pump element side vertically, forms space portion between the 1st, the 2nd lining and live axle and through hole.
According to third aspect present invention, owing to formed space portion between the 1st lining and the 2nd lining, so this space portion becomes oil storage space, the feasible flow velocity that flows into the leakage of oil of closed chamber slows down.
Fourth aspect present invention is the oil pressure pump that the third aspect is put down in writing, and it is characterized by, and the span between aforementioned the 1st lining and the 2nd lining is not more than 1/3 of length axially between the two end part of the 1st lining and the 2nd lining.
According to a forth aspect of the invention, can guarantee enough liner sleeve length of supporting driving shaft.
The invention of fifth aspect present invention record is the oil pressure pump that the third aspect is put down in writing, and it is characterized by, and aforementioned the 2nd oil groove is communicated with aforesaid space portion and aforementioned closed chamber.
According to the 5th aspect, the leakage of oil after flow velocity is fully reduced in as the space portion of oil storage space can be imported in the closed chamber.
The invention of sixth aspect present invention record is the oil pressure pump that the third aspect is put down in writing, it is characterized by, the end of aforementioned closed chamber side of the 1st oil groove that is formed at aforementioned the 1st lining is towards the lip opening of aforementioned sealed member, and the end of the pump element side of the 1st oil groove is towards aforesaid space portion opening.
According to the 6th aspect, owing to can therefore, can reduce the load of leakage of oil with the leakage of oil after flow velocity is fully reduced in as the space portion of oil storage space by near the 1st oil groove importing lip to lip.
The invention of seventh aspect present invention record is the oil pressure pump of third aspect record, it is characterized by, further have the 3rd oil groove, the 3rd oil groove is communicated with from the pump element side direction aforesaid space portion of aforementioned the 2nd lining, makes from this pump element and drains to the 1st oil groove that aforementioned the 2nd lining is avoided in leakage of oil the through hole.
According to the 7th aspect, because the leakage of oil that flows into the pump element side of the 2nd lining can all not flow into the 1st oil groove of the 2nd lining, so when leakage of oil increases, the flow velocity of the leakage of oil that flows into closed chamber can be reduced in the stage more early, the breakage of the 1st, the 2nd lining and sealed member can be prevented more effectively.
The invention of eighth aspect present invention record is the oil pressure pump of the 7th aspect record, it is characterized by, the opening portion of space portion side that is communicated with the opening portion of aforesaid space portion and the space portion side of the 2nd oil groove of closed chamber and is communicated with the 3rd oil groove of aforementioned pump element and space portion is arranged at 180 positions of spending of staggering.
According to eight aspect, can reduce the flow resistance that flows into the leakage of oil in the 2nd oil groove via the 3rd oil groove greatly, its result can reduce the flow velocity of this leakage of oil effectively.
The invention that ninth aspect present invention is put down in writing is the oil pressure pump of third aspect record, it is characterized by, and further has the 2nd communication passage of direct connection aforesaid space portion and low voltage side.
According to the 9th aspect,, therefore,, can prevent that also its stress makes the phenomenon of lip breakage because the flow velocity of this leakage of oil is accelerated even under the situation that leakage of oil increases because the 2nd communication passage has reduced the flow of the leakage of oil that flows into the 1st oil groove.
The invention that tenth aspect present invention is put down in writing is the oil pressure pump that first aspect is put down in writing, and it is characterized by, and further has the 2nd communication passage that directly is communicated with from the pump element side direction low voltage side of aforementioned through hole.
According to the tenth aspect, flow into the leakage of oil of the pump element side of lining, be branched off into two streams, one is imported into closed chamber via the 1st oil groove, its another flow directly into the low voltage side of pump element, therefore, leakage of oil can all not flow into the 1st oil groove of lining, as a result, can reduce the leakage of oil amount that flows into the 1st oil groove, prevent the breakage of lining and sealed member more effectively.
The invention that the present invention the tenth is put down in writing on the one hand is the oil pressure pump that first aspect is put down in writing, and it is characterized by, and when aforementioned the 2nd oil groove was arranged in oil pressure pump and is loaded onboard state, the 2nd oil groove was positioned at the Vertical direction downside.
According to the invention of the tenth one side, because deadweight, leakage of oil flows in the 2nd oil groove easily, therefore, can reduce the leakage of oil that flows to the 1st oil groove effectively.
The invention that the present invention puts down in writing the 12 aspect is the oil pressure pump of first aspect record, it is characterized by, and said sleeve, the plate member that will be formed with aforementioned the 1st oil groove curves cylindrical shape and forms.
According to the 12 aspect, be unusual difficulty though form oil groove, because the application's lining is that the plate member that will be formed with oil groove curves cylindric formation, so process very easy at the inner peripheral surface of cylinder part.
The invention that the present invention puts down in writing the 13 aspect is the oil pressure pump that first aspect is put down in writing, and it is characterized by, and aforementioned the 1st oil groove is formed on the inner peripheral surface of said sleeve.
According to the invention of the 13 aspect,, just need not to be provided with oil groove on the high live axle of requirement of strength because the 1st oil groove is formed at bush side.
The invention that the present invention puts down in writing the 14 aspect is the oil pressure pump that first aspect is put down in writing, and it is characterized by, and aforementioned the 2nd oil groove and is positioned on the inner peripheral surface of this through hole between aforementioned through hole and said sleeve.
According to the 14 aspect, owing to the 2nd oil groove is formed on the inner peripheral surface of through hole, so can form the 2nd oil groove simultaneously with through hole.
The invention that the present invention puts down in writing the 15 aspect is the oil pressure pump that first aspect is put down in writing, and it is characterized by, and aforementioned the 1st communication passage and aforementioned through hole are provided with abreast.
According to the invention of the 15 aspect, because the 1st communication passage and through hole be arranged in parallel, layout is good, can make oil pressure pump reach miniaturization.
Description of drawings
Fig. 1 is the sectional view of the oil pressure pump of expression embodiments of the invention 1.
Fig. 2 is the sectional view of S1-S1 among Fig. 1.
The schematic representation that Fig. 3 describes for the leakage of oil stream to present embodiment.
Fig. 4 is the unfolded drawing of the lining of present embodiment.
The schematic representation that Fig. 5 describes for the leakage of oil stream to present embodiment.
The schematic representation that Fig. 6 describes for the leakage of oil stream to present embodiment.
Label declaration: O1, O2 is a space portion, and P is a driving mechanism, and R is a lip, S is a flow control valve, Y1, Y3 is the 1st oil groove, and Y2 is the 2nd oil groove, Y4 is the 3rd oil groove, and 1 is pump element, and 2 is pump cover, 3 is pump case, and 3a is a through hole, and 3c is a low pressure chamber, 3d is a discharge route, 3e, 3f is a passage, and 4 is cam ring, 5 is impeller, and 6 is rotor, and 6a is splined hole (serration hole), 7,8 is side plate, 7a, 8a is the notch shape passage, and 9 is pump chamber, 11 is closed chamber, and 12 is sealed member, 13,14 is lining, 15 is live axle, and 16 is spline part, 17,18 is sealed department, 19 is communication passage, and 19a is the 2nd communication passage, and 20 for discharging the chamber.
Embodiment
Below, the embodiment of oil pressure pump of the present invention is illustrated.
To the power steering device oil pressure pump in the present embodiment, be applicable to promptly that specifically the example of wing pump describes.
Yet oil pressure pump of the present invention is not defined as and is only applicable to the power steering device, is applicable to other forms of such as all common liq pumps such as plunger pump, reciprocating pumps too.
＜embodiment 1 〉
Below, describe with regard to embodiments of the invention 1.
Fig. 1 is the sectional view of the oil pressure pump of expression embodiments of the invention 1, and Fig. 2 is the S1-S1 sectional view of Fig. 1, and Fig. 3 is the unfolded drawing of the lining of present embodiment, and Fig. 4 is the sketch of the leakage of oil stream of explanation present embodiment oil pressure pump.
As shown in Figure 1 and Figure 2, the oil pressure pump of present embodiment mainly is made of pump cover 2, pump case 3 and live axle 15, and wherein said pump cover 2 is used to receive armored pump element 1, is formed with through hole 3a on the pump case 3, and this live axle 15 is arranged in this through hole 3a.
The cam ring 4 of aforementioned pump element 1 is received in this cam ring 4 simultaneously rotor 6 is housed to be clipped in the state setting between the aftermentioned side plate 7,8, can a plurality of impellers 5 be installed with freely advancing and retreat along radial direction on this rotor 6.
In addition, be formed with the pump chamber 9 that is divided into by adjacent impeller 5 in the aforementioned cam ring 4.
Aforementioned pump chamber 9 is because its volume of rotation of rotor 6 changes, and the part that increases because of the variation of this volume forms and sucks the zone, and the part of volume reducing forms discharging area.
Be formed with in the aforementioned discharging area opposing sideplates 7,8 towards radial direction open notch shape passage 7a, 8a, the working oil of inside is discharged in the discharge chamber 20 of annular recess of cam ring 4 peripheries.
In addition, not shown suction port connect be formed on the regional opposing sideplates 7 of aforementioned suction on.
End at the through hole 3a of aforementioned pump case 3 is provided with closed chamber 11 and sealed member 12, and live axle 15 is supported in this through hole 3a by aftermentioned lining 13 (the 1st lining) and lining 14 (the 2nd lining).
Aforementioned live axle 15 is the parts that are used for driven pump element 1, and the spline part 16 of pump element 1 side passes the splined hole 6a of the through hole 7b embedding rotor 6 of side plate 7, and whereby, live axle 15 drives rotors 6 rotations, in other words, and live axle 15 driven pump elements 1.
In addition, the front end of pump element 1 side of aforementioned live axle 15 has play ground to embed in the through hole 8a of side plate 8.
As shown in Figure 3, said sleeve 13,14 forms tubular separately, and this tubular is curved in that this groove M is become under the situation of inner face side by the plate member that is formed with two groove M.
In addition, lining 13,14 is arranged in the interval that live axle 15 earth's axis upwards are separated by and are stipulated.
In addition, aforementioned predetermined distance is to bear the required distance of live axle 15, for example is roughly 1/3 size of distance between the two end part that are not more than lining 13,14.
Also have, be formed at the open end of closed chamber 11 sides of the 1st oil groove Y1 of the internal surface of said sleeve 13, with sealed member 12, specifically the state that the lip R of sealed member 12 is relative links to each other with sealed member 12.
On the one hand, the open end of pump element 1 side of aforementioned the 1st oil groove Y1 links to each other with the space portion O1 that is clipped between the lining 13,14.
In addition, form in the mode of avoiding aforementioned the 1st oil groove Y1 to the 2nd oil groove Y2 that closed chamber 11 is communicated with from aforementioned space portion O1.
Aforementioned the 2nd oil groove Y2 axially is formed at the foot of through hole 3a, is separated by lining 14 and the 1st oil groove Y1 to form (with reference to Fig. 2).
In addition, the open end of closed chamber 11 sides of the 2nd oil groove Y2 is in the state that outwards staggers diametrically with respect to aforementioned lip R, so that the aftermentioned leakage of oil can not produce strong direct bump to lip R.
On the other hand, the same with lining 13, also be formed with the 1st oil groove Y3 on the lining 14, the 1st oil groove Y3 makes the space portion O2 of pump element 1 side be communicated with the O1 of aforesaid space portion.
Have again, be provided with discharge route 3d, flow control valve S etc. that connection sucks the pump chamber 9 in zone and schemes the hydraulic transmission (actuator) of the outer power steering device of the low pressure chamber 3c (low voltage side of pump element) of outer oil storage tank, the pump chamber 9 that is communicated with discharging area and figure in the aforementioned pump case 3, this flow control valve S will discharge the never illustrated exhaust port discharge of remaining working oil in the chamber 20 and carry out flow control.
Aforementioned low pressure chamber 3c with the seam crossing of side plate 7 along the axle Nogata to forming towards two direction branches, its front end is formed with circular-arc suction port (not shown).
In addition, be formed with not shown suction port in side plate 7, aforementioned low pressure chamber 3c forms facing to this suction port.
Also have, aforementioned low pressure chamber 3c links to each other with closed chamber 11 by the passage 19 with the formation of through hole 3a almost parallel ground.
In addition, aforementioned pump case 3 and pump cover 2 are interconnected fixing by not shown bolt etc., and in addition, this both seam becomes by sealed department 17 and prevents to be discharged to the leakage of oil of discharging in the chamber 20 state to external leaks.
In addition, be provided with sealed department 18 between aforementioned pump cover 2 and the side plate 8, be cut off sealing thereby discharge between chamber 20 and the through hole 3a.
In addition, in the end from pump case 3 stretches out of aforementioned live axle 15 driving mechanism P such as driving wheel are installed, aforementioned driving wheel is by the outer internal combustion engine drives rotation of figure.
Below, describe with regard to the action of the oil pressure pump of present embodiment.
The oil pressure pump of this kind structure drives rotor 6 rotations by driven live axle 15 rotations by driving mechanism P.
And, by the rotation of aforementioned rotor 6, after working oil is fed to low pressure chamber 3c from passage 3e, be inhaled in the pump chamber 9 that sucks the zone.
At this, working oil is subjected to the effect of pump, is discharged to by the pump chamber 9 from discharging area and discharges the chamber 20.
, be discharged to working oil in aforementioned discharge chamber 20 by flow control valve S controlling its flow when, be discharged in the hydraulic transmission of the outer power steering device of figure through the passage 3f of discharge route 3d thereafter.
Then, aforementioned working oil is discharged from from passage 3f on the one hand, on the other hand mainly the lubricated slit that forms by being used for rotor 6 and side plate 7,8 from pump element 1 along live axle the 15 space portion O2 that bleed.
Drain to the leakage of oil among the O2 of aforesaid space portion, in this space portion O2, play the effect of lubricant oil, and flow among the 1st oil groove Y3 of lining 14, play and live axle 15 between the effect of lubricant oil in be imported among the space portion O1.
After this, from aforementioned space portion O1 flow into lining 13 the 1st oil groove Y1 leakage of oil play and live axle 15 between the effect of lubricant oil in be imported into the closed chamber 11.
On the other hand, the leakage of oil that flows into the 2nd oil groove Y2 from aforementioned space portion O1 is avoided aforementioned the 1st oil groove and is directly imported the closed chamber 11.
In addition, as previously mentioned, because aforementioned the 2nd oil groove Y2 is arranged at the foot of through hole 3a, so leakage of oil can easily flow among the 2nd oil groove Y2 by deadweight.
In addition, the leakage of oil among aforementioned the 2nd oil groove Y2 is owing to the influence that is not subjected to the rotation of live axle 15, so compare more mobile with the 1st oil groove Y1.
Next, the leakage of oil that flows in the closed chamber 11 is got back among the low pressure chamber 3c of low voltage side of pump element 1 through communication passage 19, circulates once more in pump element 1.
Just, as shown in Figure 4, the oil pressure pump of present embodiment, leakage of oil from pump element 1 side leakage to space portion O2 is branched off into the 1st oil groove Y1 by lining 13 and is imported into stream in the closed chamber 11 (among the figure shown in the solid arrow) and the 2nd oil groove Y2 and is imported into stream in the closed chamber 11 (among the figure shown in the dotted arrow) after the 1st oil groove Y3 of lining 14 imports space portion O1.
In addition, in Fig. 4, for convenience of explanation, the 2nd oil groove Y2 is depicted as the position, side that is positioned at live axle 15.
Therefore, for the oil pressure pump of present embodiment, the 1st oil groove Y1, Y3 can make and obtain needed lubricity (corresponding with first aspect present invention) between live axle 15 and the lining 13,14.
In addition, because aforementioned the 2nd oil groove Y2 plays the effect of the bypass passageways of the 1st oil groove Y1, so leakage of oil is not among whole inflow the 1st oil groove Y1, its result, compare with invention up to now,, also can reduce the leakage of oil influx that flows into the 1st oil groove Y1 even under the situation that the leakage of oil amount increases, reduce the flow velocity of this leakage of oil, can prevent the lining 13 that the stress owing to leakage of oil causes and the breakage (corresponding) of sealed member 12 with first aspect present invention.
In addition, owing to make the open end of closed chamber 11 sides of aforementioned the 2nd oil groove Y2 be communicated in the position that the lip R with sealed member 12 staggers diametrically, lip R is directly clashed in the leakage of oil that can avoid being imported among the 2nd oil groove Y2, can avoid this lip R is applied unnecessary stress and improves the durability of sealed member 12.
Also have, because in the present embodiment, the 1st oil groove Y1 is formed on the inner peripheral surface of lining 13, so there is no need on the live axle 15 that requirement of strength is arranged, to form oil groove, simultaneously, because the 2nd oil groove Y2 is formed on the inner peripheral surface of through hole 3a (space portion O1), so the 2nd oil groove Y2 and through hole 3a are formed simultaneously.
＜embodiment 2 〉
Below, describe with regard to embodiments of the invention 2.
In the oil pressure pump of present embodiment, owing to except the 1st oil groove Y3 that avoids said sleeve 14 is formed with the 3rd oil groove Y4 of O2 of communicating space portion and space portion O1, other parts are all identical with previous embodiment 1, and same structural member uses same symbol, therefore, at this its explanation is omitted.
Fig. 5 is the schematic representation of the stream of the leakage of oil of explanation embodiments of the invention 2.
As shown in Figure 5, the oil pressure pump of present embodiment is avoided the 1st oil groove Y3 of lining 14 and is formed with the 3rd oil groove Y4 of O2 of communicating space portion and space portion O1.
In addition, though in Fig. 5, for convenience of description, the 2nd oil groove Y2 and the 3rd oil groove Y4 are depicted as the position of the side that is positioned at live axle 15, but the 2nd oil groove Y2 is formed at its lowermost position of through hole 3a, and the 3rd oil groove Y4 is formed at the uppermost position of through hole 3a.
Below, describe with regard to the action of the oil pressure pump of present embodiment.
In addition, about the explanation of the action of pump element 1 owing to previous embodiment 1 identical the omission.
The oil pressure pump of present embodiment is the same with previous embodiment 1, spills the next leakage of oil inflow space O2 of portion from pump element 1, plays a role as lubricant oil in this space portion O2.
Then, from space portion O2 flow into that leakage of oil the 1st oil groove Y3 of lining 14 is played and live axle 15 between the effect of lubricant oil, and be imported among the space portion O1.
On the one hand, flowing into leakage of oil the 3rd oil groove Y4 from space portion O2 avoids the 1st oil groove Y3 and flows directly among the space portion O1.
In addition, because the leakage of oil among aforementioned the 3rd oil groove Y4 is not subjected to the influence of the rotation of live axle 15, so compare more mobile with the 1st oil groove Y3.
Then, the leakage of oil that flows into the 1st oil groove Y1 of lining 13 from space portion O1, is being imported in the closed chamber 11 when playing a role as the lubricant oil of live axle 15.
On the other hand, the leakage of oil that flows into the 2nd oil groove Y2 from space portion O1 is avoided aforementioned the 1st oil groove Y1 and is flowed directly into the closed chamber 11.
Next, the leakage of oil in the inflow closed chamber 11 is got back among the low pressure chamber 3c and in pump element 1 by communication passage 19 and is circulated once more.
Promptly, the oil pressure pump of present embodiment, after the leakage of oil that spills from pump element 1 converges among the space portion O2, be branched off into the 1st oil groove Y3 by lining 13 and import stream (shown in solid arrow among the figure) among the space portion O1 and the 3rd oil groove Y4 and import stream (shown in dotted arrow among the figure) among the space portion O1.
Therefore, in the oil pressure pump of present embodiment, the 1st oil groove Y1, Y3 can make between lining 13,14 and the live axle 15 and obtain needed lubricity (corresponding with first aspect present invention).
In addition, even under the situation that the leakage of oil amount increases, the leakage of oil among the O2 of inflow space portion is not among the 1st oil groove Y3 of whole inflow linings 14, its result, can reduce the flow velocity of leakage of oil in the stage more early, prevent the breakage of lining 13,14 and sealed member 12 more effectively.
In addition, because the 2nd oil groove Y2 is formed at the uppermost position of through hole 3a, the 3rd oil groove Y4 is formed at its lowermost position of through hole 3a, in other words, the circumferencial direction that the 2nd oil groove Y2 and the 3rd oil groove Y4 are formed at respect to live axle 15 has rotated on the position of 180 degree, so can increase flowing into the flow resistance of the leakage of oil of the 2nd oil groove Y2 by the 3rd oil groove Y4, the result can reduce the flow velocity of this leakage of oil effectively.
＜embodiment 3 〉
Below, describe with regard to embodiments of the invention 3.
At first, the oil pressure pump of present embodiment has formed except having omitted the 2nd oil groove Y2 the 2nd communication passage 19a of O2 of connection space portion and low pressure chamber 3c, other parts are all identical with previous embodiment 1, therefore, same component parts uses same label, and omits its explanation.
Fig. 6 is the schematic representation of the leakage of oil stream of explanation embodiments of the invention 3.
As shown in Figure 6, the oil pressure pump of present embodiment is formed with the 2nd communication passage 19a of O2 of communicating space portion and low pressure chamber 3c.
In addition, aforementioned the 2nd communication passage 19a is arranged on the uppermost position of through hole 3.
Also have, be preferably among aforementioned the 2nd communication passage 19a flow control valve that aftermentioned can be adjusted the leakage of oil flow is set.
Below, describe with regard to the action of the oil pressure pump of present embodiment.
About the action specification of pump element 1 because identical, in this omission with previous embodiment 1.
The oil pressure pump of present embodiment, identical with previous embodiment 1, the leakage of oil that spills from pump element 1 converges to the space portion O2.
Then, aforementioned leakage of oil is worked as lubricant oil at space portion O2 place, and flows among the 1st oil groove Y3 of lining 14 as the lubricant oil of live axle 15 and work, and simultaneously, is flowed among the space portion O1.
Then, aforementionedly flow into leakage of oil the 1st oil groove Y1 as the lubricant oil of live axle 15 and be imported in the closed chamber 11 when working, then, be imported among the low pressure chamber 3c through communication passage 16 from space portion O1.
On the other hand, the leakage of oil that flows into the 2nd communication passage 19a from space portion O1 directly is imported among the low pressure chamber 3c.
And the leakage of oil that flows into low pressure chamber 3c from aforementioned the 2nd communication passage 19a and the 1st oil groove Y1 circulates pump element 1 once more.
That is to say, the oil pressure pump of present embodiment, the leakage of oil that spills from pump element 1 is pooled to the space portion O2, after the 1st oil groove Y3 by lining 14 is imported among the space portion O1, is branched off into via the 1st oil groove Y1 and is imported into the stream (shown in solid arrow among the figure) in the closed chamber 11 and is imported into stream (shown in dotted arrow among the figure) among the low pressure chamber 3c via the 2nd communication passage 19a.
Therefore, in the oil pressure pump of present embodiment, can obtain desirable lubricity (corresponding) between lining 13,14 and the live axle 15 with first aspect present invention by the 1st oil groove Y1, Y3.
In addition, because the 2nd communication passage 19a has reduced the flow of the leakage of oil of flowing through the 1st oil groove Y1, so, also can prevent because the flow velocity of this leakage of oil is accelerated with its stress damage lip R even under the situation that leakage of oil increases.
More than, being illustrated with regard to embodiments of the invention, concrete formation of the present invention is not limited to present embodiment, also all is contained in the present invention not exceeding change design that main idea scope of the present invention carries out etc.
For example, shape, position, the formation quantity of leakage of oil each oil groove of flowing through all can be done suitable setting.
In addition, also can in each oil groove that leakage of oil is flowed through, valve be set.
Claims (15)
1. an oil pressure pump is characterized by, and has:
Be formed with the pump case of through hole;
Pump cover with aforementioned pump case combination;
Receipts are loaded on the pump element between aforementioned pump case and the pump cover;
Be located at the lining in the aforementioned through hole;
Be supported in the live axle of said sleeve;
Be arranged at the closed chamber of aforementioned through hole end;
Be arranged at the sealed member in the aforementioned closed chamber, the sealing parts are with exclusion seal between aforementioned pump case and the live axle;
The 1st oil groove is arranged between aforementioned live axle and the lining, and is communicated with from the pump element lateral seal chamber of aforementioned through hole, will import closed chamber from the sealing oil that this pump element drains to the through hole;
The 2nd oil groove from the pump element lateral seal chamber connection of aforementioned pump bushing, will be avoided aforementioned the 1st oil groove and import closed chamber from the leakage of oil that this pump element drains to the through hole;
The 1st communication passage is communicated with from the low voltage side of aforementioned closed chamber to pump element, and reclaims the leakage of oil in the sealing chamber.
2. the oil pressure pump of putting down in writing as claim 1, it is characterized by, aforementioned sealed member has the lip that is arranged on the slip surface place of aforementioned live axle, and aforementioned the 2nd oil groove is arranged at the position that the lip with aforementioned sealed member staggers diametrically with the open end of the closed chamber side of the 2nd oil groove.
3. the oil pressure pump of putting down in writing as claim 1 is characterized by, and said sleeve is made of the 1st lining of the closed chamber side of spaced apart predetermined distance and the 2nd lining of pump element side vertically, forms space portion between the 1st, the 2nd lining and live axle and through hole.
4. the oil pressure pump of putting down in writing as claim 3 is characterized by, and the span between aforementioned the 1st lining and the 2nd lining is not more than 1/3 of length axially between the two end part of the 1st lining and the 2nd lining.
5. the oil pressure pump of putting down in writing as claim 3 is characterized by, and aforementioned the 2nd oil groove is communicated with aforesaid space portion and aforementioned closed chamber.
6. the oil pressure pump of putting down in writing as claim 3 is characterized by, and the end of aforementioned closed chamber side of the 1st oil groove that is formed at aforementioned the 1st lining is towards the lip opening of aforementioned sealed member, and the end of the pump element side of the 1st oil groove is towards aforesaid space portion opening.
7. the oil pressure pump of putting down in writing as claim 3 is characterized by, and also has the 3rd oil groove, and the 3rd oil groove is communicated with from the pump element side direction aforesaid space portion of aforementioned the 2nd lining, makes from this pump element and drains to the 1st oil groove that aforementioned the 2nd lining is avoided in leakage of oil the through hole.
8. the oil pressure pump of putting down in writing as claim 7, it is characterized by, be communicated with the opening portion of aforesaid space portion and the space portion side of the 2nd oil groove of closed chamber and be communicated with the opening portion of space portion side of the 3rd oil groove of aforementioned pump element and space portion, be arranged at 180 positions of spending of staggering.
9. the oil pressure pump of putting down in writing as claim 3 is characterized by, and also has the 2nd communication passage of direct connection aforesaid space portion and low voltage side.
10. the oil pressure pump of putting down in writing as claim 1 is characterized by, and also has the 2nd communication passage that directly is communicated with from the pump element side direction low voltage side of aforementioned through hole.
11. the oil pressure pump as claim 1 is put down in writing is characterized by, aforementioned the 2nd oil groove is arranged to, and under oil pressure pump was loaded onboard state, the 2nd oil groove was positioned at the Vertical direction downside.
12. the oil pressure pump as claim 1 is put down in writing is characterized by, said sleeve forms by the curved circle of the plate member that will be formed with aforementioned the 1st oil groove.
13. the oil pressure pump as claim 1 is put down in writing is characterized by, aforementioned the 1st oil groove is formed at the inner peripheral surface of said sleeve.
14. the oil pressure pump as claim 1 is put down in writing is characterized by, aforementioned the 2nd oil groove and is positioned at the inner peripheral surface of this through hole between aforementioned through hole and said sleeve.
15. the oil pressure pump as claim 1 is put down in writing is characterized by, aforementioned the 1st communication passage and aforementioned through hole are provided with abreast.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP198406/2003 | 2003-07-17 | ||
| JP2003198406A JP2005036687A (en) | 2003-07-17 | 2003-07-17 | Hydraulic pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1576595A true CN1576595A (en) | 2005-02-09 |
| CN100335793C CN100335793C (en) | 2007-09-05 |
Family
ID=34208201
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100617582A Expired - Fee Related CN100335793C (en) | 2003-07-17 | 2004-06-30 | Oil hydraulic pump |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2005036687A (en) |
| CN (1) | CN100335793C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101709704B (en) * | 2009-10-31 | 2011-11-16 | 广东正力精密机械有限公司 | Vortex compressor capable of preventing oil leakage to engine body exterior |
| CN103362569A (en) * | 2012-03-27 | 2013-10-23 | 哈米尔顿森德斯特兰德公司 | Ram air turbine pump leakage control |
| CN109578105A (en) * | 2019-01-17 | 2019-04-05 | 湖南机油泵股份有限公司 | A kind of auxiliary lubricating oil pump |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018025151A (en) * | 2016-08-10 | 2018-02-15 | サンデン・オートモーティブコンポーネント株式会社 | Fluid machine |
| CN109237285A (en) * | 2018-11-29 | 2019-01-18 | 湖南机油泵股份有限公司 | A kind of gear type oil pump for capableing of fast lubricant bushing |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07279871A (en) * | 1994-04-04 | 1995-10-27 | Showa:Kk | Drive shaft pivotally support structure in oil pump |
| JPH0942168A (en) * | 1995-07-25 | 1997-02-10 | Kayaba Ind Co Ltd | Oil seal structure of vane pump driving shaft |
| CA2162311C (en) * | 1995-11-07 | 1998-12-22 | Robert A.R. Mills | Seal arrangement for the drivehead of a downhole rotary pump |
| JP3387781B2 (en) * | 1997-06-24 | 2003-03-17 | 株式会社日立ユニシアオートモティブ | Hydraulic pump |
-
2003
- 2003-07-17 JP JP2003198406A patent/JP2005036687A/en active Pending
-
2004
- 2004-06-30 CN CNB2004100617582A patent/CN100335793C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101709704B (en) * | 2009-10-31 | 2011-11-16 | 广东正力精密机械有限公司 | Vortex compressor capable of preventing oil leakage to engine body exterior |
| CN103362569A (en) * | 2012-03-27 | 2013-10-23 | 哈米尔顿森德斯特兰德公司 | Ram air turbine pump leakage control |
| US9238972B2 (en) | 2012-03-27 | 2016-01-19 | Hamilton Sundstrand Corporation | Ram air turbine pump leakage control |
| US9719367B2 (en) | 2012-03-27 | 2017-08-01 | Hamilton Sundstrand Corporation | Ram air turbine pump leakage control |
| CN109578105A (en) * | 2019-01-17 | 2019-04-05 | 湖南机油泵股份有限公司 | A kind of auxiliary lubricating oil pump |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2005036687A (en) | 2005-02-10 |
| CN100335793C (en) | 2007-09-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070905 Termination date: 20110630 |