CN2547911Y - Variable gear pump - Google Patents
Variable gear pump Download PDFInfo
- Publication number
- CN2547911Y CN2547911Y CN 02228878 CN02228878U CN2547911Y CN 2547911 Y CN2547911 Y CN 2547911Y CN 02228878 CN02228878 CN 02228878 CN 02228878 U CN02228878 U CN 02228878U CN 2547911 Y CN2547911 Y CN 2547911Y
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- Prior art keywords
- gear
- driven gear
- internal tooth
- pump
- driving gear
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- 238000007789 sealing Methods 0.000 claims description 35
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 14
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 5
- 238000005086 pumping Methods 0.000 claims description 5
- 230000008093 supporting effect Effects 0.000 description 3
- 238000000605 extraction Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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Abstract
The utility model belongs to a gear pump in the hydraulic field, in particular to a variable gear pump. The utility model is characterized in that: a variable mechanism comprising a driven gear, an axis, a notched cover, a plunger and a plunger support can move in the axial direction in the working cavity of a pump body. Thus, the axial position of the driven gear relative to a drive gear is changed. The axial position of the drive gear is unchanged so a part of the drive gear and a part of the driven gear are out of mesh. Thus, the mesh length of the drive gear and the driven gear is changed and then the output volume changes accordingly. Especially an inner gear sleeve capable of axial direction movement, which is the same as the drive gear in gear shape and outer diameter, is arranged on the part of the drive gear out of mesh. An inner gear sleeve capable of being axial direction positioning, which is the same as the driven gear in gear shape, but bigger than the driven gear in outer diameter, and the outer circle of which is arranged in a ring groove in the working cavity, with the axial position unchanged, is arranged on the part of the driven gear out of mesh. Thus, the sealability of the variable gear pump is ensured.
Description
Technical field
The utility model belongs to Hydraulic Field, relates to gear pump, particularly gear pump with variable capacity (motor).
Background technique
In current Hydraulic Field, gear pump is widely used because of it has plurality of advantages, and for example: simple in structure, easy to manufacture, cheap, easy to maintenance, stain resistance is strong or the like, all is that other pump kind can not be compared.But existing gear pump also has many-sided weakness such as noise is big, pressure pulsation is big, discharge capacity is immutable.Particularly discharge capacity is immutable, makes its application area be subjected to restriction largely.Be widely used in the variable delivery hydraulic system on all kinds of machinery such as engineering machinery, building machinery, farm machinery in the modern times, existing gear pump can't be selected.If make gear pump selected in variable delivery hydraulic system, at first must make it agree have the variable function, here with regard to having proposed the problem of a gear pump with variable capacity,, caused concern widely in Hydraulic Field at this problem, also there are many people to do research.But do not see the successful report of relevant variable gear pump research up to now, do not have the product of success to appear on the market simultaneously yet.
The model utility content
The utility model proposes according to above-mentioned background, and its purpose will make gear pump have the variable function exactly, satisfying the needs of all kinds of variable delivery hydraulic systems, thereby further enlarges its using scope.
The purpose of this utility model is achieved like this: gear pump with variable capacity, it comprises the pump housing, driving gear shaft, stroking mechanism, sealing system, it is characterized in that: the pump housing is made up of the back auxiliary pump body 9 on the preceding auxiliary pump body 4 on the main pump body placed in the middle 6 and the left side, the right and front-end bearing pedestal 3, rear bearing block 10, the inner chamber of main pump body 6 is to be intersected by two cylindrical bore equalitys to form, the public part that intersects is the meshing zone, two cylindrical holes are respectively driving gear active chamber and driven gear active chamber, are respectively equipped with oil sucting cavity and pumping cavity on the both sides of meshing zone; Hydraulic cylinder cavity is coaxial with the driven gear active chamber, and its internal diameter is identical with the driven gear active chamber, and the stroking mechanism active chamber is made up of hydraulic cylinder cavity and driven gear active chamber; The both sides of the pump housing are respectively equipped with front-end bearing pedestal 3 and rear bearing block 10, are respectively equipped with hole a and hole b on front-end bearing pedestal 3 and the rear bearing block 10, and hole a and hole b communicate with left side hydraulic cylinder cavity and the right hydraulic cylinder cavity respectively;
Driving gear shaft is mainly cooperated by driving shaft 1 and driving gear 5 and forms, and is arranged in the driving gear shaft active chamber of the pump housing, and is bearing in respectively on front-end bearing pedestal 3 and the rear bearing block 10 by former and later two bearings 2;
Stroking mechanism mainly is made up of driven shaft 11, driven gear 14, lining 13, bearing 16, piston 17, month facing 12, piston holder 8, stroking mechanism is arranged in the stroking mechanism active chamber of the pump housing, stroking mechanism by the moon facing 12 and piston 17 be bearing on the pump housing, driven gear 14 be meshed with driving gear 5 and can about move axially;
Sealing system mainly is made up of axially displaced internal tooth casing 7, axially locating internal tooth casing 15, and axially displaced internal tooth casing 7 is positioned at the right of driving gear 5, and flank profil is all identical with driving gear 5 with external diameter; Axially locating internal tooth casing 15 is enclosed within on the driven gear 14, and flank profil is identical with driven gear 14, and external diameter is greater than driven gear 14.
On described axially displaced internal tooth casing 7 each internal tooth a hole g who communicates with two ends, the left and right sides is arranged all.
On described axially locating internal tooth casing 15 each internal tooth a hole c who communicates with two ends, the left and right sides is arranged all.
The utility model at one by main pump body and former and later two auxiliary pump bodies, and in the pump housing of former and later two bearing support five parts compositions, the stroking mechanism that parts such as the driven shaft of gear pump, driven gear, bearing, lining and month facing, piston, the cold support of living are formed, be installed in the stroking mechanism active chamber, this mechanism can move axially in work.Because moving axially of stroking mechanism changes with respect to the axial position of driving gear with regard to making driven gear, fix because of the axial position of driving gear again, so respectively some will withdraw from engagement for driving gear and driven gear.Like this, just change driving and driven gear meshing length, thereby also just changed the gear pump delivery.
All some has withdrawed from engagement for driving gear and driven gear.For the sealing of this part gear, the particularly sealing of four end faces, more complicated just becomes.Withdraw from the position of engagement at driving gear, installed a flank profil and external diameter all with the identical axially displaced internal tooth casing of driving gear, the position of inside and outside gear teeth combination has just formed a combination cylinder body.Because this internal tooth casing and driving gear can be axially displaced, so this combination cylinder body can be shifted arbitrarily on driving gear; Withdraw from the position of engagement at driven gear, it is identical that a flank profil and driven gear also have been installed, and external diameter is greater than the axially locating internal tooth casing of driven gear, and its outer ring is placed in the circular groove in the stroking mechanism active chamber, and axial position is fixed.Equally, the position of inside and outside gear teeth combination has also formed a combination cylinder body.Because driven gear and this internal tooth casing also can be axially displaced, so this combination cylinder body also can displacement arbitrarily on driven gear.By cooperating of these two combination cylinder bodies and each relevant work face of miscellaneous part, to finish sealing to full pump.(so-called herein sealing is meant the interior sealing of pump, Hereinafter the same.)
Here be necessary to point out: in the utility model art designs, stroking mechanism is the basis, and internal tooth casing is crucial.Can guarantee to have in the gear pump with variable capacity excellent sealing performance be the matter of utmost importance of success or failure.Many in the past design proposals about gear pump with variable capacity can not successful implementation, and are relevant with sealability design failure basically.
Description of drawings
Fig. 1 is the utility model master sectional view
Fig. 2 is that Fig. 1 is along A-A line sectional elevation
Fig. 3 is that Fig. 1 is along B-B line sectional elevation
Fig. 4 is that Fig. 1 is along C-C line sectional elevation
Fig. 5 is that Fig. 1 is along D-D line sectional elevation
Wherein auxiliary pump body, 10-rear bearing block, 11-driven shaft, 12-month facing, 13-lining, 14-driven gear, 15-axially locating internal tooth casing, 16-bearing, 17-piston, a-hole, b-hole, c-hole, d-curve bath, e-hole, f-hole, g-hole, h-separate wells, j-compensating groove, m-hole, n-hole behind auxiliary pump body, 5-driving gear, 6-main pump body, the axially displaced internal tooth casing of 7-, 8-piston holder, the 9-before the 1-driving shaft, 2-bearing, 3-front-end bearing pedestal, 4-.
Embodiment
Described in detail below in conjunction with 5 pairs of combinations of the present utility model of accompanying drawing 1-accompanying drawing and working principle:
The structure of this gear pump with variable capacity mainly can be divided into four parts: the pump housing, driving gear shaft, stroking mechanism (driven gear shaft), sealing system.
The pump housing is made up of the back auxiliary pump body 9 on the preceding auxiliary pump body 4 on the main pump body placed in the middle 6 and the left side, the right and front-end bearing pedestal 3, rear bearing block 10 5 parts.The inner chamber of main pump body 6 is to be intersected by two cylindrical bore equalitys to form, the public part that intersects is the meshing zone, two cylindrical holes are respectively driving gear active chamber and driven gear active chamber, be respectively equipped with oil sucting cavity and pumping cavity on the both sides of meshing zone, on preceding auxiliary pump body 4 and back auxiliary pump body 9, two work circular holes are arranged respectively respectively.With the driving gear active chamber coaxial be spindle hole, they and driving gear active chamber have been formed the driving gear shaft active chamber; With the driven gear active chamber coaxial be oil hydraulic cylinder, internal diameter is identical with the driven gear active chamber, they and driven gear active chamber have been formed the stroking mechanism active chamber.In addition, hydraulic cylinder port on preceding auxiliary pump body 4 right sides has an internal diameter greater than oil hydraulic cylinder and coaxial with it shoulder hole, this Kong Zaiqian auxiliary pump body 4 and the circular groove that has just become after main pump body 6 makes up in the stroking mechanism active chamber.Front-end bearing pedestal 3 and rear bearing block 10 have been disposed on the both sides of the pump housing.These two supporting masses that bearing support is a main shaft bearing are again the cylinder caps of two oil hydraulic cylinders simultaneously.
Driving gear shaft is mainly cooperated by driving shaft 1 and driving gear 5 and forms, and by former and later two bearing 2 supportings, is installed in the driving gear shaft active chamber in the pump housing.And, the plane of driving gear 5 left sides and preceding auxiliary pump body 4 is adjacent to, with anti-leak by the locking nut adjustment.
Stroking mechanism mainly is made up of parts such as driven shaft 11, driven gear 14, lining 13, bearing 16, piston 17, month facing 12, piston holders 8.By moon facing 12 and piston 17 supporting, be installed in the stroking mechanism active chamber in the pump housing, and can about move axially.When forming end thrust when pressure oil begins to enter the right oil hydraulic cylinder from the b hole in, left side oil hydraulic cylinder just begins oil extraction from a hole.Stroking mechanism will progressively move from right to left this moment, and driven gear 14 also is moved to the left thereupon.Because the axial position of driving gear 5 can not change, therefore, the left side of the right of driving gear 5 and driven gear 14 respectively has operative gear to begin progressively to withdraw from engagement.So, driving and driven gear meshing line also just gradually from large to small.Otherwise, then change from small to big gradually.Here be not difficult to find out that the variation of line of contact must bring the variation of discharge capacity.When stroking mechanism moved to left the limit position of oil hydraulic cylinder, driving and driven gear still had one section gear teeth to keep engagement, and its purpose mainly is to guarantee that gear has enough intensity and exempts from damage.(the advancing of oil hydraulic cylinder, oil extraction control system are that known technology this paper refuses enumeration).
Sealing system mainly is made up of two internal tooth casings: a right that is mounted in driving gear 5, flank profil and external diameter all with driving gear 5 identical axially displaced internal tooth casings 7.It is in when assembling, and its internal tooth just has in one section teeth groove that stretches into driving gear 5 in advance, makes it to rotate synchronously with driving gear 5, moves axially about also can be in the teeth groove of driving gear 5; Another is to be enclosed within on the driven gear 14, and flank profil is identical with driven gear 14, and external diameter is greater than the axially locating internal tooth casing 15 of driven gear 14.Its outer ring is placed in the interior circular groove of stroking mechanism active chamber, and axial position is fixed.Its internal tooth is embedded in the teeth groove of driven gear 14, and driven gear 14 can drive its synchronous rotation, also can move axially therein.
The sealing of existing gear pump can be divided into three parts basically: a part is linear sealing, just is meant the line of contact sealing; Another part is the curved surface sealing, is meant the sealing that each top circle cooperates with the relevant work cavity wall; Also a part is a plane sealing, is meant the sealing that the corresponding end face of each gear cooperates with the pump cover plane.The linear sealing of gear pump with variable capacity and existing gear pump and curved surface sealing are all basic identical, and still, plane sealing is just different.Because moving axially of driven gear 14 made driving gear 5 and driven gear 14 corresponding end faces misplace, can not be on same plane, that is to say that the condition of original plane sealing has not had.Therefore, this gear pump with variable capacity has just adopted two internal tooth casings to come the end face of gear is sealed.Concrete condition is described below:
On driving gear 5 the right, the internal tooth on the axially displaced internal tooth casing 7 extend in the teeth groove of driving gear 5, and the teeth groove that withdraws from engagement is tamped.Because their tooth corridor and external diameter are all identical, so the position of inside and outside gear teeth combination has in fact become the cylindrical body of a combination, teeth groove is sealed by internal tooth like this.As for the cylindrical of this combination cylinder body and driving gear shaft active chamber inwall cooperate and with the cooperating and belong to the curved surface sealing of moon facing 12 crescent moon arcs.Because just require on same plane in the design of the left side of the left end of axially displaced internal tooth casing 7 and month facing 12, therefore, this plane and driven gear 14 right sides have just constituted plane sealing.The sealing condition of Here it is gear the right end face.
Equally, axially locating internal tooth casing 15 has also become a combination cylinder body with the position of driven gear 14 inside and outside gear teeth combinations.The teeth groove of driven gear 14 is also sealed by internal tooth.The curved surface sealing of external circle of this combination cylinder and circular groove inwall, the plane sealing of both ends of the surface and two groove faces, this has just solved the sealing of driven gear 14 left sides.Because just require on same plane in the right side of axially locating internal tooth casing 15 and the right planar design of preceding auxiliary pump body 4, therefore, this plane and driving gear 5 left sides have just constituted plane sealing.The sealing condition of Here it is gear left side end face.
Add the curved surface sealing and the line of contact sealing of the cylindrical and the relevant work cavity wall of driving gear 5 and driven gear 14.The all sealings of this gear pump with variable capacity have so just been finished.
Because the internal tooth of axially locating internal tooth casing 15 embeds in the teeth groove of driven gear 14, about same teeth groove is divided into two sections.When this teeth groove rotated to closing position, internal tooth the right and left had all formed independent enclosed space.If this moment, driven gear 14 moved axially, no matter direction how, always have in the teeth groove on one side because of pocketed oil generation high pressure, another side then becomes vacuum, and this has just caused a kind of axial entrap phenomenon.This phenomenon exists on driving gear 5 and axially displaced internal tooth casing 7 too.Because axially pocketed oil can seriously hinder the work even the inefficacy of stroking mechanism.In order to eliminate axial entrap phenomenon, so the utility model adopts following two measures:
1, on each internal tooth of axially locating internal tooth casing 15, a hole c who communicates with two ends, the left and right sides is arranged all.When driven gear 14 moved axially, the oil in the high pressure teeth groove will be through this orifice flow to the vacuum teeth groove on one side.
2, on each internal tooth of axially displaced internal tooth casing 7, a hole g who communicates with two ends, the left and right sides is all arranged, when axially displaced internal tooth casing 7 moved axially, the oil in the driving gear 5 sealing teeth groove will be through this orifice flow to the right, and the compensating groove j on piston holder 8 discharges again.Otherwise, through this route oil-feed.
On axially displaced internal tooth casing 7 right sides, all there is a separate wells h in the place corresponding with each internal tooth, and its area is identical with an internal tooth, and communicates with a hole g.When a certain internal tooth enters pumping cavity, this internal tooth will be subjected to one axial pressure.At this moment, high pressure oil in the pumping cavity will enter on the right side in the separate wells h by hole g, because of the right side of axially displaced internal tooth casing 7 and the left plane of piston holder 8 being close to, so, one axial pressure opposite just produced in the separate wells h with preceding counteracted by pressure with preceding pressure equal and opposite in direction, direction.When this internal tooth entered oil sucting cavity, preceding pressure was removed, and the pressure in the separate wells h is also removed simultaneously.
On axially locating internal tooth casing 15, the right side of each internal tooth all has curve bath d one, is the compensating groove that is used for preventing to mesh pocketed oil.
Hole e is an oil inlet hole, and hole f is an oil outlet.
Hole m, hole n person are the low pressure oilholes.
Claims (3)
1, gear pump with variable capacity, it comprises the pump housing, driving gear shaft, stroking mechanism, sealing system, it is characterized in that: the pump housing is made up of the back auxiliary pump body (9) on the preceding auxiliary pump body (4) on the main pump body placed in the middle (6) and the left side, the right and front-end bearing pedestal (3), rear bearing block (10), the inner chamber of main pump body (6) is to be intersected by two cylindrical bore equalitys to form, the public part that intersects is the meshing zone, two cylindrical holes are respectively driving gear active chamber and driven gear active chamber, are respectively equipped with oil sucting cavity and pumping cavity on the both sides of meshing zone; Hydraulic cylinder cavity is coaxial with the driven gear active chamber, and its internal diameter is identical with the driven gear active chamber, and the stroking mechanism active chamber is made up of hydraulic cylinder cavity and driven gear active chamber; The both sides of the pump housing are respectively equipped with front-end bearing pedestal (3) and rear bearing block (10), are respectively equipped with hole (a) and hole (b) on front-end bearing pedestal (3) and the rear bearing block (10), and hole (a) and hole (b) communicates with left side hydraulic cylinder cavity and the right hydraulic cylinder cavity respectively;
Driving gear shaft is mainly cooperated by driving shaft (1) and driving gear (5) and forms, and is arranged in the driving gear shaft active chamber of the pump housing, and is bearing in respectively on front-end bearing pedestal (3) and the rear bearing block (10) by former and later two bearings (2);
Stroking mechanism mainly is made up of driven shaft (11), driven gear (14), lining (13), bearing (16), piston (17), month facing (12), piston holder (8), stroking mechanism is arranged in the stroking mechanism active chamber of the pump housing, stroking mechanism is bearing on the pump housing by moon facing (12) and piston (17), driven gear (14) be meshed with driving gear (5) and can about move axially;
Sealing system mainly is made up of axially displaced internal tooth casing (7), axially locating internal tooth casing (15), and axially displaced internal tooth casing (7) is positioned at the right of driving gear (5), and flank profil is all identical with driving gear (5) with external diameter; Axially locating internal tooth casing (15) is enclosed within on the driven gear (14), and flank profil is identical with driven gear (14), and external diameter is greater than driven gear (14).
2, gear pump with variable capacity according to claim 1 is characterized in that: on each internal tooth of axially displaced internal tooth casing (7) hole that communicates with two ends, the left and right sides (g) is arranged all.
3, gear pump with variable capacity according to claim 1 is characterized in that: on each internal tooth of axially locating internal tooth casing (15) hole that communicates with two ends, the left and right sides (c) is arranged all.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02228878 CN2547911Y (en) | 2002-04-01 | 2002-04-01 | Variable gear pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02228878 CN2547911Y (en) | 2002-04-01 | 2002-04-01 | Variable gear pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2547911Y true CN2547911Y (en) | 2003-04-30 |
Family
ID=33705324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02228878 Expired - Fee Related CN2547911Y (en) | 2002-04-01 | 2002-04-01 | Variable gear pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2547911Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102121561A (en) * | 2010-06-04 | 2011-07-13 | 湖南机油泵股份有限公司 | Displacement-variable gear oil pump |
| CN105275787A (en) * | 2014-07-16 | 2016-01-27 | 张龙 | Hydraulic variable pump |
| CN106051108A (en) * | 2016-05-04 | 2016-10-26 | 陈金祥 | Variable gear pump type automobile stepless speed changer |
| CN106882264A (en) * | 2017-03-30 | 2017-06-23 | 福建船政交通职业学院 | A kind of automatically controlled variable-flow steering boost system |
| CN106989013A (en) * | 2017-05-03 | 2017-07-28 | 哈尔滨理工大学 | It is a kind of to realize the gear pump with variable capacity of stepless speed regulation |
| CN115467825A (en) * | 2022-09-30 | 2022-12-13 | 中国航发哈尔滨东安发动机有限公司 | A compound structure gear pump |
-
2002
- 2002-04-01 CN CN 02228878 patent/CN2547911Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102121561A (en) * | 2010-06-04 | 2011-07-13 | 湖南机油泵股份有限公司 | Displacement-variable gear oil pump |
| CN102121561B (en) * | 2010-06-04 | 2015-09-16 | 湖南机油泵股份有限公司 | Variable-displacement gear-type oil pump |
| CN105275787A (en) * | 2014-07-16 | 2016-01-27 | 张龙 | Hydraulic variable pump |
| CN106051108A (en) * | 2016-05-04 | 2016-10-26 | 陈金祥 | Variable gear pump type automobile stepless speed changer |
| CN106882264A (en) * | 2017-03-30 | 2017-06-23 | 福建船政交通职业学院 | A kind of automatically controlled variable-flow steering boost system |
| CN106989013A (en) * | 2017-05-03 | 2017-07-28 | 哈尔滨理工大学 | It is a kind of to realize the gear pump with variable capacity of stepless speed regulation |
| CN115467825A (en) * | 2022-09-30 | 2022-12-13 | 中国航发哈尔滨东安发动机有限公司 | A compound structure gear pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |