CN203570586U - Internal gear pump - Google Patents
Internal gear pump Download PDFInfo
- Publication number
- CN203570586U CN203570586U CN201320321890.7U CN201320321890U CN203570586U CN 203570586 U CN203570586 U CN 203570586U CN 201320321890 U CN201320321890 U CN 201320321890U CN 203570586 U CN203570586 U CN 203570586U
- Authority
- CN
- China
- Prior art keywords
- internal gear
- gear
- pump
- internal
- bearing
- 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
Links
- 230000002706 hydrostatic effect Effects 0.000 claims abstract description 31
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 12
- 239000010959 steel Substances 0.000 claims abstract description 12
- PPIIGEJBVZHNIN-UHFFFAOYSA-N [Cu].[Sn].[Pb] Chemical compound [Cu].[Sn].[Pb] PPIIGEJBVZHNIN-UHFFFAOYSA-N 0.000 claims abstract description 11
- 230000003068 static effect Effects 0.000 claims description 24
- 238000013016 damping Methods 0.000 claims description 14
- 238000000605 extraction Methods 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 6
- 239000000945 filler Substances 0.000 claims description 5
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 4
- 150000004767 nitrides Chemical class 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 4
- 238000005245 sintering Methods 0.000 claims description 4
- 239000011159 matrix material Substances 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims 1
- 229910052802 copper Inorganic materials 0.000 claims 1
- 239000010949 copper Substances 0.000 claims 1
- 229910000648 terne Inorganic materials 0.000 claims 1
- 229910000851 Alloy steel Inorganic materials 0.000 abstract description 2
- 229910001128 Sn alloy Inorganic materials 0.000 abstract 1
- 238000010521 absorption reaction Methods 0.000 abstract 1
- 239000000758 substrate Substances 0.000 abstract 1
- 238000004073 vulcanization Methods 0.000 abstract 1
- 239000012530 fluid Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 230000000153 supplemental effect Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2/00—Rotary-piston machines or pumps
- F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
- F04C2/101—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with a crescent-shaped filler element, located between the inner and outer intermeshing members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2/00—Rotary-piston machines or pumps
- F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
- F04C2/102—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member the two members rotating simultaneously around their respective axes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/50—Bearings
- F04C2240/54—Hydrostatic or hydrodynamic bearing assemblies specially adapted for rotary positive displacement pumps or compressors
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
Abstract
The utility model relates to an internal gear pump which comprises a pump body, a pump shaft, an internal gear, an external gear, a front cover and a rear cover, wherein the internal gear and the external gear are arranged eccentrically and engaged with each other; a crescent block is arranged between a tooth top of the external gear and a tooth top of the internal gear; and a non-engaged space between the external gear and the internal gear is divided into an oil absorption area and an oil drainage area. The internal gear pump is characterized in that a bimetallic hydrostatic bearing is mounted between an inner cavity of a pump body and the internal gear; the external gear drives the internal gear to run freely in the bimetallic hydrostatic bearing; according to the bimetallic hydrostatic bearing, a copper-lead-tin alloy is sintered on the internal surface of a steel plate serving as a substrate, and the steel plate and alloy steel subjected to nitridation and vulcanization treatment form an ideal friction pair; after the friction pair is assembled with the pump body, a hydrostatic groove is formed in a high-pressure area on the internal surface of the bearing contacted with an outer ring of the internal gear; and high-pressure oil is led in from a through hole of the oil drainage area to form hydrostatic support. Therefore, the rotation speed and the output pressure of the pump are increased, and the internal gear pump is low in running noise and long in service life.
Description
Technical field
The utility model relates to the application of a kind of bimetal hydrostatic bearing on crescent gear pump, specifically refers to be equipped with on crescent gear pump bimetal hydrostatic bearing.
Background technique
At present, the development to the requirement of Energy Saving Technology by Hydraulic Pressure and frequency conversion servo techniques, crescent gear pump is due to wide speed range, and high volumetric efficiency and low noise, be used widely in all trades and professions.Conventional crescent gear pump comprises the pump housing, pump shaft, internal gear, external gear and with the protecgulum of filler opening, form with the bonnet of oil outlet, be contained in the internal gear of pump housing inner chamber, form eccentric setting with the external gear being contained on pump shaft, external gear and internal gear intermesh, between the tooth top of external gear and the tooth top of internal gear, be provided with moon block teeth, the non-engagement spatial separation that external gear and internal gear bias are reserved is oil suction district and oil extraction district.External gear rotation on outer power-driven pump axle and pump shaft, with the also rotation simultaneously of internal gear of external gear engagement, throws off time space when tooth and increases, and produces oil-absorbing process, meshes time space simultaneously and reduces, and produces oil extraction process.
Because internal gear and the pump housing of conventional pumps all be take iron as basic material, though process through the whole bag of tricks, material composition difference is little, and intersolubility is high, the in the situation that of work under bad environment, lubricated disruption can occur especially, and easily interlock is worn and torn.The oil extraction district pressure of pump is higher, and the eccentric force acting on internal gear is just larger, internal gear tightly can be pressed in to the running of pump housing inner chamber like this, when pressure height to a certain extent, rupture of oil film between the outer ring of internal gear and pump housing internal chamber wall, produces directly friction, is directed at and pulls interlock damage.These reasons have seriously limited working pressure and the rotating speed of conventional pumps.
Summary of the invention
For the existing problem of above-mentioned crescent gear pump, the utility model provides a kind of effective solution, can, more than high pressure 20MPA and in severe working environment at a high speed, keep oily film strength, avoid producing direct friction, increase substantially working pressure and the working life of pump.
The utility model solves the problems of the technologies described above taked technological scheme: crescent gear pump comprises the pump housing, pump shaft, internal gear, external gear and with the protecgulum of filler opening, bonnet with oil outlet, be contained in the internal gear of pump housing inner chamber, form eccentric setting with the external gear being contained on pump shaft, external gear and internal gear intermesh, between the tooth top of external gear and the tooth top of internal gear, be provided with moon block teeth, the non-engagement spatial separation that external gear and internal gear bias are reserved is oil suction district and oil extraction district, it is characterized in that: bimetal hydrostatic bearing is housed between pump housing inner chamber and internal gear, by the external gear on pump shaft, drive internal gear freely to turn round in bimetal hydrostatic bearing.Practice shows, in order to prevent adhesive wear, selecting as much as possible does not almost have the material of intersolubility as friction pair, in this programme, because the copper-lead tin on the bimetallic bearing top layer solubility in alloyed steel is very low, while therefore matching, friction factor is little, and the cohesion of generation is minimum.The metallographic structure that the alloy steel material via nitride treatment surface that internal gear is used forms, there is lower friction factor and adhere to tendency, significantly improve antisticking abrasion, scrape resistence, bite-resistant ability, vulcanizing treatment can increase the ability of metal surface adsorpting lubrication oil, strengthens oil film rigidity.Described bimetal hydrostatic bearing take the copper-lead-tin of cylinder type hollow internal surface sintering one deck respective thickness that steel plate is matrix, because this Albatra metal-intensity is high, wear resistance is good, and bite-resistant ability is high, can form with the alloyed steel of nitrogenize vulcanizing treatment desirable friction pair.
When inside engaged gear pump work, in oil extraction district, produce high pressure, now pressure can tightly be pressed in internal gear the bimetallic bearing surface running of pump housing inner chamber.And the copper-lead-tin layer intensity on bimetallic bearing surface is high, be applicable to secondary fine processing.Described bimetal hydrostatic bearing is with after pump housing assembling, in the bearing inner surface zone of high pressure contacting with internal gear outer ring, open several static pressure grooves, from oil extraction district, by damping hole, introducing high pressure oil formation static pressure supports, the pressure that static pressure support force can be followed oil extraction district raises or reduces, its internal gear pressure is inside and outside balanced, the fluid of going out from the overflow of static pressure groove peripheral clearance, plays good lubricating to playing the remaining surface of supplemental support effect simultaneously.Damping hole is stablized the effect of static pressure groove peripheral clearance in addition, when gap becomes large, the fluid of overflow increases, the pressure drop of static pressure groove, gap can dwindle automatically, work as gap smaller, the fluid of overflow reduces, and the pressure of static pressure groove increases, and gap can increase automatically, so damping hole can allow internal gear and bimetal hydrostatic bearing keep suitable glade plane space all the time, and make between moving element to keep isolation oil film, do not produce direct friction, not only improved rotating speed and the delivery pressure of pump, and running noise is low, long service life.
Described static pressure groove is connected with oil extraction district by damping hole, and the area of static pressure groove is relevant with the thickness of static pressure oil film with the diameter of damping hole.
Described bimetal hydrostatic bearing becomes interference fit with pump housing inner chamber, guarantees that bimetal hydrostatic bearing is connected with the pump housing.
Compared with the existing technology, due at crescent gear pump inner chamber with interference fit by having filled bimetal hydrostatic bearing, and this bimetallic bearing internal surface has adopted with the extremely low copper-lead-tin of alloyed steel intersolubility, after the alloyed steel via nitride vulcanizing treatment of internal gear, more increased the bite-resistant performance with bimetallic bearing internal surface.With respect to general dress axle sleeve technique contrast, the utility model utilizes thickness and the accurately machined feature of secondary of bimetallic bearing internal surface copper-lead-tin layer, after interference assembling, by fine finishing, can reach the high requirement of hydrostatic bearing to friction pair form and position tolerance completely, and in zone of high pressure, open static pressure groove, by damping hole, with oil drain out, be connected, balance internal gear pressure inside and outside, makes bimetallic bearing have static pressure function.Practice shows, the utility model has effectively solved crescent gear pump internal gear outer ring when high pressure and, with a difficult problem for pump housing inner chamber interlock, improved the delivery pressure of pump and used rotating speed, reduces heating, extends the life-span of pump.
Accompanying drawing explanation
Fig. 1 is structure principle chart of the present utility model;
Fig. 2 is the sectional drawing of pump;
Label declaration in accompanying drawing;
1, the pump housing; 2, protecgulum; 3, bonnet; 4, internal gear; 5, external gear; 6, bimetal hydrostatic bearing; 7, month block teeth; 8, damping hole; 9, static pressure groove; 10, pump shaft; 11, key; A, filler opening; B, oil drain out; C, oil suction district; D, oil extraction district.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described.
Please refer to shown in Fig. 1, crescent gear pump comprises the pump housing 1, pump shaft 10, internal gear 4, external gear 5 and with the protecgulum 2 of filler opening, bonnet 3 with oil outlet, be contained in the internal gear 4 of pump housing inner chamber, form eccentric setting with the external gear 5 being contained on pump shaft 10, external gear 5 and internal gear 4 intermesh, between the tooth top of external gear 4 and the tooth top of internal gear 5, be provided with moon block teeth 7, the non-engagement spatial separation that external gear 5 and internal gear 4 bias are reserved is oil suction district c and oil extraction district d, between the pump housing 1 inner chamber and internal gear 4, bimetal hydrostatic bearing 6 is housed, by the external gear 5 on pump shaft 10, drive internal gears 4 freely to turn round bimetal hydrostatic bearing 6 is interior.
Described bimetal hydrostatic bearing 6 take the copper-lead-tin of the hollow internal surface sintering of cylindrical body one deck respective thickness that steel plate is matrix, and because the solubility of copper-lead tin in alloyed steel is very low, while therefore matching, friction factor is little, and the cohesion of generation is minimum.The metallographic structure that alloyed steel via nitride treatment surface forms, has lower friction factor and adheres to tendency, significantly improves antisticking abrasion, scrape resistence, bite-resistant ability, and vulcanizing treatment can increase the ability of metal surface adsorpting lubrication oil, strengthens oil film rigidity.Adopt bimetallic bearing 6 and the internal gear 4 of above material and process treating to form desirable friction pair, friction factor is low, and bite-resistant ability is good.
Above-mentioned bimetallic bearing 6 wall thickness are no more than 5 millimeters, the thickness of internal surface copper-lead-tin layer is no more than 1,5 millimeter, by bimetal plate, rolled, after being assembled into integral body with the pump housing 1 interference, can carry out secondary fine processing, by fine finishing, can reach the high requirement of hydrostatic bearing to friction pair form and position tolerance completely, and in zone of high pressure, open static pressure groove 9, by damping hole 8, with oil drain out b, be connected, balance internal gear 4 pressure inside and outside, makes bimetallic bearing have static pressure function.Adopt such design to be because hydrostatic bearing is high to the Geometrical Tolerance Principle of friction pair, after general axle sleeve assembling, do not reach the Geometrical Tolerance Principle of hydrostatic bearing to friction pair at all.
Above-mentioned bimetal hydrostatic bearing 6 is when work, by damping hole 8, static pressure groove 9 is connected with oil drain out, when d pressure in oil extraction district raises, the pressure of static pressure groove 9 also raises, like this internal gear pressure is inside and outside played to balanced action, the fluid of going out from the 9 peripheral clearance overflows of static pressure groove, plays good lubricating to playing the remaining surface of supplemental support effect simultaneously.Damping hole 8 is stablized the 9 peripheral clearance effects of static pressure groove in addition, when gap becomes large, the fluid of overflow increases, the pressure drop of static pressure groove 9, gap can dwindle automatically, works as gap smaller, the fluid of overflow reduces, the pressure of static pressure groove 9 increases, and gap can increase automatically, so damping hole can allow internal gear 4 and bimetal hydrostatic bearing 6 keep suitable glade plane space all the time.
Claims (5)
1. a crescent gear pump, comprise the pump housing (1), pump shaft (10), internal gear (4), external gear (5) and with the protecgulum (2) of filler opening, bonnet (3) with oil outlet, be contained in the internal gear (4) of pump housing inner chamber, form eccentric setting with the external gear (5) being contained on pump shaft (10), external gear (5) and internal gear (4) intermesh, between the tooth top of external gear (4) and the tooth top of internal gear (5), be provided with moon block teeth (7), the non-engagement spatial separation that external gear (5) and internal gear (4) bias are reserved is oil suction district (c) and oil extraction district (d), it is characterized in that, between the pump housing (1) inner chamber and internal gear (4), bimetal hydrostatic bearing (6) is housed, by the external gear (5) on pump shaft (10), drive internal gear (4) freely to turn round in bimetal hydrostatic bearing (6), described bimetal hydrostatic bearing (6) take the cylinder type hollow internal surface sintering layer of copper terne metal that steel plate is matrix, the internal gear (4) that the alloyed steel of take is together material via nitride vulcanizing treatment forms friction pair, in the bearing inner surface zone of high pressure contacting with internal gear (4) outer ring, open static pressure groove (9), from oil extraction district, by damping hole (8), introduce high pressure oil and form static pressure support.
2. a kind of crescent gear pump as claimed in claim 1, is characterized in that: bimetallic bearing (6) is interference fit with the pump housing (1).
3. a kind of crescent gear pump as claimed in claim 1, is characterized in that: it is secondary that the copper-lead-tin of the same bimetallic bearing of described internal gear (4) (6) internal surface forms sliding friction.
4. a kind of crescent gear pump as claimed in claim 3, it is characterized in that: described bimetal hydrostatic bearing (6) has several static pressure grooves (9) in internal gear (4) and the corresponding zone of high pressure of internal surface of bimetallic bearing (6), by the same oil drain out of damping hole (8) (b), be connected, during the same work of its area, eccentricity pressure is relevant with damping hole (8) diameter.
5. a kind of crescent gear pump as claimed in claim 3, is characterized in that: described bimetal hydrostatic bearing (6), and the wall thickness of bimetal hydrostatic bearing (6) is no more than 5 millimeters, and wherein the copper-lead-tin layer of surperficial sintering is no more than 1,5 millimeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320321890.7U CN203570586U (en) | 2013-06-04 | 2013-06-04 | Internal gear pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320321890.7U CN203570586U (en) | 2013-06-04 | 2013-06-04 | Internal gear pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203570586U true CN203570586U (en) | 2014-04-30 |
Family
ID=50538319
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320321890.7U Expired - Fee Related CN203570586U (en) | 2013-06-04 | 2013-06-04 | Internal gear pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203570586U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108412758A (en) * | 2018-01-18 | 2018-08-17 | 广东精铟海洋工程股份有限公司 | A kind of low noise crescent gear pump with long service life |
| CN108425837A (en) * | 2018-01-18 | 2018-08-21 | 广东精铟海洋工程股份有限公司 | A kind of crescent gear pump with straight-side profile of low noise |
| CN112814895A (en) * | 2021-02-07 | 2021-05-18 | 上海涌憬液压机械有限公司 | Take bimetallic bearing's crescent gear pump |
| GB2588752B (en) * | 2019-10-21 | 2022-06-15 | Delphi Tech Ip Ltd | Fuel pump assembly |
| WO2024205694A1 (en) * | 2023-03-30 | 2024-10-03 | Parker-Hannifin Corporation | Assemblies for an internal gear pump with hydrostatic support features |
-
2013
- 2013-06-04 CN CN201320321890.7U patent/CN203570586U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108412758A (en) * | 2018-01-18 | 2018-08-17 | 广东精铟海洋工程股份有限公司 | A kind of low noise crescent gear pump with long service life |
| CN108425837A (en) * | 2018-01-18 | 2018-08-21 | 广东精铟海洋工程股份有限公司 | A kind of crescent gear pump with straight-side profile of low noise |
| GB2588752B (en) * | 2019-10-21 | 2022-06-15 | Delphi Tech Ip Ltd | Fuel pump assembly |
| CN112814895A (en) * | 2021-02-07 | 2021-05-18 | 上海涌憬液压机械有限公司 | Take bimetallic bearing's crescent gear pump |
| WO2024205694A1 (en) * | 2023-03-30 | 2024-10-03 | Parker-Hannifin Corporation | Assemblies for an internal gear pump with hydrostatic support features |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140430 Termination date: 20200604 |