CN204738961U - Variable type gear pump - Google Patents
Variable type gear pump Download PDFInfo
- Publication number
- CN204738961U CN204738961U CN201520371943.5U CN201520371943U CN204738961U CN 204738961 U CN204738961 U CN 204738961U CN 201520371943 U CN201520371943 U CN 201520371943U CN 204738961 U CN204738961 U CN 204738961U
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- Prior art keywords
- driven
- shaft
- driving
- gear
- packing ring
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Abstract
The utility model discloses a variable type gear pump, the main part adopts the vice and driven vice configuration mode with alternately misfit of initiative, and alternately during the misfit, during the driven shaft inserted the vice ring type filling round hole of initiative, during the driving shaft inserts driven pair of ring type filling round hole, and driving gear and driven gear all had in the groove of some another ring type fillings of embedding, make variable gear pump sealing area increase, hydraulic oil backward flow spillage reduces, makes the oil absorption chamber isolated more abundant with the pressure oil pocket, and the leakproofness is better. The major structure embedding is in the casing inner chamber, and the both ends lid is fixed at the casing both ends, and the round hole that has supporting driving shaft and driven shaft is respectively covered at both ends, and the round hole of supporting driving shaft has limiting displacement to the driving shaft, and the driving shaft is used for receiving outside torque input, the driven shaft can carry out axial displacement in supporting the hole, driven gear and initiative gear engagement rotate. The symmetrical structure of variable pump makes speed range big, and the operational shock noise is little, and the pump oil head improves, has improved work efficiency.
Description
Technical field
The utility model relates to a kind of gear pump, specifically, relates to a kind of variable type gear pump.
Background technique
Gear pump structure is simple, low cost of manufacture, suction capacity are strong, oil resistant liquid pollution capacity is strong, is commonly used for power plant, particularly applies more extensive in low service system in hydraulic system.But the gear pump used at present is metering pump, can only make the high pressure liquid force feed backflow with hydraulic energy under overvoltage condition, therefore make hydraulic system efficiency low, energy loss is large, generates heat high.
The technological scheme about gear pump with variable capacity is disclosed in patent CN201396274 and patent CN101029642.The two variable method used is all the popular mode being changed gear pump delivery by the length of action changing gear.But these two kinds of variable type gear pump Problems existing are structure imperfections, while change length of action, the part do not engaged for gear is just affixed incompatible maintenance simply by tooth top and pump inwall and seals, with isolated oil sucting cavity and pumping cavity, this mode easily causes leakage, the working efficiency of pump is reduced, and energy consumption increases, and is difficult to high-pressure trend; And causing hydraulic system efficiency low, energy loss is large, generates heat high.
Model utility content
In order to avoid the deficiency that prior art exists, the sealing overcoming gear pump is poor, and hydraulic system efficiency is low, and energy loss is large, is difficult to the problem of high-pressure trend, the utility model proposes a kind of variable type gear pump.
The utility model solves the technological scheme that its technical problem adopts: comprise driving pair fixing frame, driving pair packing ring, driving shaft, driving gear, driven secondary fixing frame, driven secondary packing ring, driven shaft, driven gear, snap ring, housing, left end cap, right end cap, described housing is oval, respectively oilhole is had in the middle of the plane of two side, two through hole radial cross sections of housing axis become figure-8 structure, driving shaft and driving gear coordinate with driving pair fixing frame and driving pair packing ring, driven shaft and driven gear coordinate with driven secondary fixing frame and driven secondary packing ring, two-part are interlaced is embedded in housing Inner, right end cap and left end cap are fixed on housing two ends, two end cap there is respectively the circular hole of supporting driving shaft and driven shaft, driving gear and driving shaft are connected, and the relative position of driving gear and driving shaft is fixed by snap ring, and driving shaft is used for receiving external torque input, driven gear and driven shaft are installed by sliding bearing, and the relative position of driven gear and driven shaft is fixed by snap ring, driven gear and driving gear engagement rotation, described driving pair fixing frame is identical with described driven secondary fixed rack structure, fixing frame is by an annulus and a sidewall having arc-shaped concave and there is the cylindrical body composite structure of through hole centre, annulus sidewall and cylindrical arc-shaped concave are fitted, annulus and cylindrical equal diameters, internal radius is 2 times of cylindrical body through-hole diameter, one end and cylindrical one end of annulus are positioned at same plane, and annulus height is 1/3 of cylinder height, described driving pair packing ring is identical with described driven secondary packing ring structure, packing ring one end circumference has internal gear linear grooves, internal gear linear grooves is in the axial direction the half of packing ring length, has step near packing ring the other end circumference, and packing ring axially has isodiametric through hole, the annulus of driving pair fixing frame and driving pair packing ring one end fits, driving shaft one end coordinates with the cylindrical hole on driving pair fixing frame installs, and driving shaft and driving pair packing ring rotate respectively on fixing frame, annulus on driven secondary fixing frame and driven secondary packing ring one end fits, driven shaft one end coordinates with the cylindrical hole on driven secondary fixing frame installs, and driven shaft and driven secondary packing ring rotate respectively on fixing frame.
Described driving shaft is Step Shaft, and intermediate section is thick axle, and the thin shaft length in the left side is equal with the thick shaft length in centre, and the thin shaft length in the right is 2 times of middle thick shaft length.
Described driven shaft is Step Shaft, and intermediate section is thick axle, and the thin shaft length in the left side is 1/2 of middle thick shaft length, and the thin shaft length in the right is 2 times of middle thick shaft length.
Described driving gear is identical with the modulus of described driven gear.
Beneficial effect
A kind of variable type gear pump that the utility model proposes, compared with prior art has the following advantages:
1., in the utility model variable type gear pump structure, make this part become a complete solid cylinder because the gear teeth having neither part nor lot in pump oil can inlay with packing ring, the gap between cylindrical body and inner walls is the central core of circulation of hydraulic oil backflow leakage; The central core of circulation of refluxing with the hydraulic oil of existing gear pump with variable capacity is that tooth top is compared with the situation in the gap of inner walls, the area of gear pump with variable capacity sealing of the present utility model is much bigger, hydraulic oil backflow leakage amount can reduce greatly, thus make the isolated more abundant of oil sucting cavity and pumping cavity, better tightness, makes working efficiency and pump oil pressure improve.
2. the utility model variable type gear pump delivery regulative mode is that axis of traction does axial straight line motion, and this regulative mode is conducive to the design of outside displacement adjusting mechanism.
3. the proportional relation of the axial displacement of the utility model variable type gear pump delivery and driven pair, i.e. linear relationship; But not the non-linear relation of variable type vane pump and plunger pump, this feature is conducive to the accurate control to pump displacement.
Accompanying drawing explanation
Below in conjunction with drawings and embodiments, a kind of variable type gear pump of the utility model is described in further detail.
Fig. 1 is the utility model variable type gear pump structure schematic diagram.
Fig. 2 is the utility model variable type gear pump sectional view.
Fig. 3 is the driving pair of the utility model variable type gear pump, driven secondary erection drawing.
Fig. 4 is the driving pair of the utility model variable type gear pump, driven countershaft mapping.
Fig. 5 is the driven secondary schematic diagram of the utility model variable type gear pump.
Fig. 6 is the driven secondary erection drawing of the utility model variable type gear pump.
Fig. 7 is the driving shaft schematic diagram of the utility model variable type gear pump.
Fig. 8 is the driven shaft schematic diagram of the utility model variable type gear pump.
Fig. 9 is the body diagram of the utility model variable type gear pump.
In figure:
1. driven secondary fixing frame 10. right end cap 11. left end cap 12. housing of the driven secondary packing ring 9. of driving shaft 2. driving gear 3. driving pair fixing frame 4. driving pair packing ring 5. driven shaft 6. driven gear 7. snap ring 8.
Embodiment
The present embodiment is a kind of variable type gear pump.
Consult Fig. 1 ~ Fig. 9, the present embodiment variable type gear pump is made up of driving pair fixing frame 3, driving pair packing ring 4, driving shaft 1, driving gear 2, driven secondary fixing frame 9, driven secondary packing ring 8, driven shaft 5, driven gear 6, snap ring 7 and housing 12, left end cap 11, right end cap 10.The housing 12 of gear pump is oval, oilhole is had respectively in the middle of the plane of two side, two through hole radial cross sections of housing 12 axis become figure-8 structure, driving shaft 1 and driving gear 2 coordinate with driving pair fixing frame 3 and driving pair packing ring 4, driven shaft 5 and driven gear 6 coordinate with driven secondary fixing frame 9 and driven secondary packing ring 8, two-part structure is interlaced is embedded in housing 12 Inner, driven gear 6 and driving gear 2 engagement rotation; Right end cap 10 and left end cap 11 are fixedly mounted on housing 12 two ends, right end cap 10 and left end cap 11 there is the circular hole supporting driving shaft 1 and driven shaft 5 respectively, the circular hole of supporting driving shaft 1 is to the effect of driving shaft limited location, and driven shaft 5 can move axially in supporting circular hole.Driving gear 2 and driving shaft 1 are fixedly mounted by flat key, and driving gear 2 is fixed by snap ring 7 with the relative position of driving shaft 1, and driving shaft 1 is used for receiving external torque input.Driven gear 6 and driven shaft 5 are installed by sliding bearing, and driven gear 6 is fixed by snap ring 7 with the relative position of driven shaft 5, driven gear 6 and driving gear 2 engagement rotation.
In the present embodiment, driving pair fixing frame 3 is component that two structures are identical with driven secondary fixing frame 9, fixing frame is by an annulus and a sidewall having arc-shaped concave and there is the cylindrical body composite structure of through hole centre, annulus sidewall and cylindrical radial concave surface are fitted, one end and cylindrical one end of annulus are positioned at same plane, circle diameter and cylindrical equal diameters, internal radius is 2 times of cylindrical body through-hole diameter, and annulus height is 1/3 of cylinder height.Driving pair packing ring 4 is component that two structures are identical with driven secondary packing ring 8, packing ring one end circumference has internal gear linear grooves, internal gear linear grooves is in the axial direction the half of packing ring length, has step near packing ring the other end circumference, and packing ring axially has isodiametric through hole.Annulus and driving pair packing ring 4 one end fits of driving pair fixing frame 3 are installed, cylindrical hole on driving pair fixing frame 3 and driving shaft 1 one end fits are installed, driving gear 2 is arranged on driving shaft 1 by flat key, the end face of the column part on the end face of driving gear 2 and driving pair fixing frame 3 is fitted, the relative position of driving shaft 1 and driving pair fixing frame 3 is fixed by snap ring 7, and driving shaft 1 and driving pair packing ring 4 rotate respectively on fixing frame.Annulus on driven secondary fixing frame 9 and driven secondary packing ring 8 one end fits are installed, and the cylindrical hole on driven secondary fixing frame 9 and driven shaft 5 one end fits are installed.Driven gear 6 is arranged on driven shaft 5 by sliding bearing, the end face of the column part on the end face of driven gear 6 and driven secondary fixing frame 9 is fitted, driven shaft 5 is fixed by snap ring 7 with the relative position of driven secondary fixing frame 9, and driven secondary packing ring 8 can rotate on fixing frame.Driving shaft 1 is the middle Step Shaft that slightly both sides are thin, the thin shaft length in its left side is equal with the thick shaft length in centre, the length of the thin axle in the right is 2 times of middle thick shaft length, driving gear 2 is fixed on the thin axle on the right of driving shaft 1, the end face of driving gear 2 againsts the end face of middle thick axle, driving gear 2 two ends have the groove installing snap ring 7, and driving gear 2 is fixed by the snap ring 7 on axle in the position of axis, and driving gear 2 is arranged on driving shaft 1 by flat key.Driven shaft 5 is the middle Step Shaft that slightly both sides are thin, and the thin shaft length in the left side is 1/2 of middle thick shaft length, and the thin shaft length in the right is 2 times of middle thick shaft length.Driven gear 6 is arranged on the thin axle on the right of driven shaft 5 by sliding bearing, and the end face of driven gear 6 againsts the end face of middle thick axle, and driven gear 6 two ends have the groove installing snap ring 7, and the axial position of driven gear 6 is fixed by the snap ring 7 on axle.Driving shaft 1 is used for receiving external torque input, driven gear 6 and driving gear 2 engagement rotation.
The discharge capacity adjustment process of gear pump with variable capacity is as follows: driving shaft 1 and driving gear 2 coordinate with driving pair fixing frame 3 and driving pair packing ring 4, driven shaft 5 and driven gear 6 coordinate with driven secondary fixing frame 9 and driven secondary packing ring 8, two-part structure is interlaced is embedded in housing 12 Inner, during intersection misfit, driving gear 2 and driven gear 6 all have and are partially submerged in the serrate slot of another packing ring, this embedded part is the overlapping region of gear and packing ring, at coincidence position, gear and external tooth form groove become a cylindrical body by inlaying, the part that gear is not inlayed still keeps original profile of tooth, participate in engagement and pump oil.The length of action of pump delivery and gear, i.e. the gear proportional relation of width of part of not inlaying, length of action is large, and pump delivery is just large.When driven shaft entirety moves vertically, driven secondary packing ring 8 advances to driving gear 2, driven gear 6 advances to driving pair packing ring 4, namely the length of action of driving gear 2 and driven gear 6 is changed, therefore coordinate with driven secondary fixing frame 9 and driven secondary packing ring 8 by control driven shaft 5 and driven gear 6, change pump delivery from moving axially of entirety.Driven shaft 5 and driven gear 6 coordinate with driven secondary fixing frame 9 and driven secondary packing ring 8, can draw driven shaft 5 and axially move from moving axially of entirety and realize by outside.
In the present embodiment, the driving gear 2 that variable type gear pump adopts and the modulus of driven gear 6 are 4, and the number of teeth is 10, modification coefficient is the modified gear of 0.5, and the facewidth is 35mm, and the tip diameter of two gears is 50.5mm, root diameter is 34mm, and two Gear centers distances are 43.5mm.Driving pair packing ring 4 and driven secondary packing ring groove depth are 25mm, and length of action excursion is 10mm ~ 25mm; Gear minimax discharge capacity ratio is 2.5.
Claims (4)
1. a variable type gear pump, it is characterized in that: comprise driving pair fixing frame, driving pair packing ring, driving shaft, driving gear, driven secondary fixing frame, driven secondary packing ring, driven shaft, driven gear, snap ring, housing, left end cap, right end cap, described housing is oval, respectively oilhole is had in the middle of the plane of two side, two through hole radial cross sections of housing axis become figure-8 structure, driving shaft and driving gear coordinate with driving pair fixing frame and driving pair packing ring, driven shaft and driven gear coordinate with driven secondary fixing frame and driven secondary packing ring, two-part are interlaced is embedded in housing Inner, right end cap and left end cap are fixed on housing two ends, two end cap there is respectively the circular hole of supporting driving shaft and driven shaft, driving gear and driving shaft are connected, and the relative position of driving gear and driving shaft is fixed by snap ring, and driving shaft is used for receiving external torque input, driven gear and driven shaft are installed by sliding bearing, and the relative position of driven gear and driven shaft is fixed by snap ring, driven gear and driving gear engagement rotation, described driving pair fixing frame is identical with described driven secondary fixed rack structure, fixing frame is by an annulus and a sidewall having arc-shaped concave and there is the cylindrical body composite structure of through hole centre, annulus sidewall and cylindrical arc-shaped concave are fitted, annulus and cylindrical equal diameters, internal radius is 2 times of cylindrical body through-hole diameter, one end and cylindrical one end of annulus are positioned at same plane, and annulus height is 1/3 of cylinder height, described driving pair packing ring is identical with described driven secondary packing ring structure, packing ring one end circumference has internal gear linear grooves, internal gear linear grooves is in the axial direction the half of packing ring length, has step near packing ring the other end circumference, and packing ring axially has isodiametric through hole, the annulus of driving pair fixing frame and driving pair packing ring one end fits, driving shaft one end coordinates with the cylindrical hole on driving pair fixing frame installs, and driving shaft and driving pair packing ring rotate respectively on fixing frame, annulus on driven secondary fixing frame and driven secondary packing ring one end fits, driven shaft one end coordinates with the cylindrical hole on driven secondary fixing frame installs, and driven shaft and driven secondary packing ring rotate respectively on fixing frame.
2. variable type gear pump according to claim 1, is characterized in that: described driving shaft is Step Shaft, and intermediate section is thick axle, and the thin shaft length in the left side is equal with the thick shaft length in centre, and the thin shaft length in the right is 2 times of middle thick shaft length.
3. variable type gear pump according to claim 1, is characterized in that: described driven shaft is Step Shaft, and intermediate section is thick axle, and the thin shaft length in the left side is 1/2 of middle thick shaft length, and the thin shaft length in the right is 2 times of middle thick shaft length.
4. variable type gear pump according to claim 1, is characterized in that: described driving gear is identical with the modulus of described driven gear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520371943.5U CN204738961U (en) | 2015-06-02 | 2015-06-02 | Variable type gear pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520371943.5U CN204738961U (en) | 2015-06-02 | 2015-06-02 | Variable type gear pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204738961U true CN204738961U (en) | 2015-11-04 |
Family
ID=54420700
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520371943.5U Expired - Fee Related CN204738961U (en) | 2015-06-02 | 2015-06-02 | Variable type gear pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204738961U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104879298A (en) * | 2015-06-02 | 2015-09-02 | 西北工业大学 | Variable displacement gear pump |
| CN106051108A (en) * | 2016-05-04 | 2016-10-26 | 陈金祥 | Variable gear pump type automobile stepless speed changer |
| CN107061261A (en) * | 2017-04-30 | 2017-08-18 | 刘泽奎 | A kind of gear pump with variable capacity |
-
2015
- 2015-06-02 CN CN201520371943.5U patent/CN204738961U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104879298A (en) * | 2015-06-02 | 2015-09-02 | 西北工业大学 | Variable displacement gear pump |
| CN106051108A (en) * | 2016-05-04 | 2016-10-26 | 陈金祥 | Variable gear pump type automobile stepless speed changer |
| CN107061261A (en) * | 2017-04-30 | 2017-08-18 | 刘泽奎 | A kind of gear pump with variable capacity |
| CN107061261B (en) * | 2017-04-30 | 2019-05-10 | 南京华纳机电设备制造有限公司 | A kind of gear pump with variable capacity |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151104 Termination date: 20160602 |