CN104963854A - Micro gear pump - Google Patents
Micro gear pump Download PDFInfo
- Publication number
- CN104963854A CN104963854A CN201510416685.2A CN201510416685A CN104963854A CN 104963854 A CN104963854 A CN 104963854A CN 201510416685 A CN201510416685 A CN 201510416685A CN 104963854 A CN104963854 A CN 104963854A
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- pump
- gear
- driven
- pump housing
- seal ring
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Abstract
The invention discloses a micro gear pump which comprises a pump body, wherein the pump body is composed of a front pump cover, a middle pump body and a rear pump body; the gear cavity of the middle pump body is internally provided with a driving gear and a driven gear which are meshed with each other; a driving shaft is fixedly arranged in the driving gear; a driven shaft is fixedly arranged in the driven gear; the driving shaft is connected with an actuating unit; the center of the gear cavity is at one side of the circle center of the middle pump body; the rear side surface of the front pump cover is provided with a first annular slot in which a first sealing ring is arranged; the first sealing ring is tightly pressed on the front end surface of the middle pump body and surrounds the outer side of the gear cavity; the front side surface of the rear pump body is provided with a second annular slot in which a second sealing ring is arranged; and the second sealing ring is tightly pressed on the rear side surface of the middle pump body and surrounds the outer side of the gear cavity. The micro gear pump dislcosed by the invention is good in sealing performance, convenient to mount and good in use effect, small size of the micro gear pump is ensured and the cost is low.
Description
Technical field
The present invention relates to a kind of gear pump, especially a kind of Mini gear pump.
Background technique
Gear pump is positive displacement devices, is widely used in industry, agricultural production.The existing Mini gear pump of China is perfect all not in structure and precision, therefore, often adopts the Mini gear pump of some imports in process of production.But in existing import Mini gear pump, gear cavity is often located at the center position of the pump housing, fixed by three locating studs arranged in plum blossom-shaped around this gear cavity.The both sides, front and back of described middle pump body seal respectively by a sealing gasket.In Mini gear pump, adopt this mode directly adding sealing gasket, easily cause medium to ooze out between sealing gasket and middle pump body, cause the liquid medium in Mini gear pump to reveal.This sealing means requires higher to the thickness of sealing gasket, the tightness of installation, and too pine can cause leakage, too tightly then can affect gear operation, therefore need the technician with professional experiences to install.And sealing gasket need be processed into the shape corresponding with middle pump body, need through special customization, cost is higher.In addition, described sealing gasket is generally Teflon sealing gasket, and long-term and wet goods medium contact easily damages, and is difficult to replace, is not suitable for diversified medium.
In existing Mini gear pump, the two ends of driven shaft and the front end of live axle are all shut, and medium wherein produces a large amount of heats owing to being subject to friction at a high speed, easily causes fault.In addition, existing gear shaft is plastics or stainless steel, and easy temperature influence produces deformation, affect the precise degrees of gear pump, and smooth surface degree is poor, easily produces larger noise.
Summary of the invention
The invention provides a kind of Mini gear pump, it is poor and to problems such as installation difficulties to its object is to solve Mini gear pump sealing effect.
A kind of Mini gear pump, comprise the pump housing, this pump housing comprises front pump cover, middle pump body, the rear pump housing, intermeshing actuation gear and driven gear is provided with in the gear cavity of described middle pump body, a live axle is fixed with in described actuation gear, a driven shaft is fixed with in described driven gear, described live axle is connected with power mechanism, the side being centrally located at the middle pump body center of circle of described gear cavity, the trailing flank of described front pump cover is provided with the first circular groove, the first seal ring is provided with in this first circular groove, the front-end face of this first seal ring and middle pump body compresses and is surrounded on outside gear cavity, the leading flank of the described rear pump housing is provided with the second circular groove, the second seal ring is provided with in this second circular groove, the trailing flank of this second seal ring and middle pump body compresses and is surrounded on outside gear cavity.
Further, the center of circle of described actuation gear overlaps with the center of circle of middle pump body.
Further, first, second seal ring described is Teflon seal ring, EPDM seal ring or Viton seal ring.
Further, by two locating studs, front pump cover, middle pump body, the alignment of the rear pump housing are connected, and are locked by two fixing rods in the described pump housing.
Further, described power mechanism comprises inner magnetic region, is covered with magnetic force cover outside this inner magnetic region, and this magnetic force cover is fixedly connected on the rear portion of the rear pump housing by gland, and this magnetic force enclosure is located in a motor, is provided with the axis hole fixing fit with live axle in described inner magnetic region.
Further, be provided with for plugging live axle and the rear driving axis hole that communicates of front and back in the described rear pump housing, with the rear driven-shaft hole for plugging driven shaft, this rear driven-shaft hole rear end is communicated with the axle Posterior circle hole that a diameter is less than rear driven-shaft hole, and this axle Posterior circle hole passes into magnetic force cover from the rear side of the rear pump housing; Be provided with suction port and exhaust port in the described rear pump housing, described suction port is communicated with an inlet opening, and described exhaust port is communicated with a liquid outlet opening, is communicated with a fluid circulation port after this liquid outlet opening, and this fluid circulation port passes into magnetic force cover from the rear side of the rear pump housing.
Further, described gear cavity both sides are respectively lead channel and liquid outlet groove, circulation port before described front pump cover is provided with and is communicated with this liquid outlet groove, and the front wheel driving axis hole that is communicated with of circulation port front with this and front driven-shaft hole respectively.
Further, described live axle and driven shaft are made by pottery.
Further, axle sleeve is equipped with in described front wheel driving axis hole, front driven-shaft hole, rear driving axis hole and rear driven-shaft hole.
Further, the trailing flank of the described rear pump housing offers a toroidal cavity coordinated with magnetic force cover.
The present invention has good seal performance, is convenient to install, the feature that using effect is good, and ensures that Mini gear pump has less size, and cost is lower simultaneously.Advantage of the present invention is embodied in the following aspects:
1) on front pump cover and the rear pump housing, be respectively equipped with first, second circular groove, and replace sealing gasket, around being located at outside gear cavity by first, second seal ring.First, second circular groove defines groove, and by coordinating with first, second seal ring, effectively having completely cut off medium and outwards having oozed out.Meanwhile, adopt seal ring to replace sealing gasket, greatly reduce installation difficulty, also reduce cost of production.The material of seal ring can be Teflon seal ring, EPDM seal ring or Viton seal ring, can change according to different media, and replaces conveniently.
2) change the position of gear cavity, be located at the side in the center of circle, and replace original three locating studs with two locating studs, to ensure can arrange first, second circular groove in the Mini gear pump of equal external diameter, make the size that Mini gear pump keeps less.Meanwhile, also cost-saved, reduce installation steps.
3) medium can carry out circulating cooling in the pump housing, avoids the accumulation of high temperature media, thus gear pump is run better.
4) adopt porcelain shaft to replace original plastic shaft or stainless steel shaft, improve the hardness of material, decrease the deformation produced by temperature variation, improve the smooth degree on surface simultaneously, reduce the noise in operation process.Further, driven shaft is shorter, reduces resistance.
5) trailing flank of the described rear pump housing offers a toroidal cavity, is convenient to the rear portion that magnetic force cover is lock onto the rear pump housing by gland.
Accompanying drawing explanation
Fig. 1 be Mini gear pump of the present invention disassemble view.
Fig. 2 is the installment state schematic diagram of Mini gear pump of the present invention.
The main apparent direction schematic diagram that Fig. 3 is middle pump body described in the present invention.
Fig. 4 is A-A generalized section in Fig. 3.
The rear apparent direction schematic diagram that Fig. 5 is front pump cover described in the present invention.
The main apparent direction schematic diagram that Fig. 6 is front pump cover described in the present invention.
Fig. 7 is the rear apparent direction partial cutaway view schematic of the pump housing rear described in the present invention.
Fig. 8 is the main apparent direction schematic diagram of the pump housing rear described in the present invention.
Fig. 9 is the scheme of installation of actuation gear and driven gear in middle pump body described in the present invention.
Embodiment
The specific embodiment of the present invention is as follows:
See figures.1.and.2, a kind of Mini gear pump, comprises the pump housing, this pump housing comprises front pump cover 1, middle pump body 2, the rear pump housing 3, one magnetic force cover 4 is fixedly connected on the rear portion of the rear pump housing 3 by gland 5, is provided with inner magnetic region 6 in this magnetic force cover 4, and this magnetic force cover 4 is sheathed in a motor (not shown).
With reference to Fig. 3, Fig. 4 and Fig. 9, be provided with a gear cavity 20 in described middle pump body 2, the side being centrally located at middle pump body 2 center of circle of this gear cavity 20, the both sides of this gear cavity 20 are respectively lead channel 200 and liquid outlet groove 201.Be provided with intermeshing actuation gear 21 and driven gear 22 in this gear cavity 20, wherein the circle of actuation gear 21 overlaps with the center of circle of middle pump body 2.Be fixed with a live axle 210 in described actuation gear 21, in described driven gear 22, be fixed with a driven shaft 220.
With reference to Fig. 1, Fig. 3, Fig. 4, Fig. 5 and Fig. 6, circulation port 101 before described front pump cover 1 is provided with and is communicated with the liquid outlet groove 201 of middle pump body 2, and the front wheel driving axis hole 11 that is communicated with of circulation port 101 front with this and front driven-shaft hole 12 respectively.The front portion of described live axle 210 is inserted in front wheel driving axis hole 11, and the front portion of described driven shaft 220 is inserted in driven-shaft hole 12.The trailing flank of the front pump housing 1 is provided with the first circular circular groove 13, is provided with the first seal ring 130 in this first circular groove 13, and this first seal ring 130 compresses with the front-end face of middle pump body 2 and is surrounded on outside gear cavity 20.
With reference to Fig. 1, Fig. 3, Fig. 4, Fig. 7 and Fig. 8, the rear driving axis hole 31 communicated before and after being provided with in the described rear pump housing 3, the rear portion of described live axle 210 is inserted in this rear driving axis hole 31, and the axis hole of live axle 210 end and inner magnetic region 6 fixes fit.The rear driven-shaft hole 32 offered from its front end is also provided with in the rear pump housing 3, the rear portion of described driven shaft 220 is inserted in this rear driven-shaft hole 32, this rear driven-shaft hole 32 rear end is communicated with the axle Posterior circle hole 33 that a diameter is less than rear driven-shaft hole 32, and this axle Posterior circle hole 33 passes into magnetic force cover 4 from the rear side of the rear pump housing 3.Be provided with suction port 300 and exhaust port 301 in the described rear pump housing 3, described suction port 300 is communicated with an inlet opening 34, and this inlet opening 34 is connected with the lead channel 200 of middle pump body 2.Described exhaust port 301 is communicated with a liquid outlet opening 35, and this liquid outlet opening 35 is connected with the liquid outlet groove 201 of middle pump body 2, and is communicated with a fluid circulation port 350 after this liquid outlet opening 35, and this fluid circulation port 350 passes into magnetic force cover 4 from the rear side of the rear pump housing 3.The leading flank of the described rear pump housing 3 is provided with the second circular circular groove 36, is provided with the second seal ring 360 in this second circular groove 36, and this second seal ring 360 compresses with the trailing flank of middle pump body 2 and is surrounded on outside gear cavity 20.The trailing flank of the described rear pump housing 3 offers a toroidal cavity 37 coordinated with magnetic force cover 4.
With reference to Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8 and Fig. 9, described gear cavity 20 and forward and backward drive shaft hole 11,31, forward and backward driven-shaft hole 12,32, front circulation port 101, axle Posterior circle hole 33, inlet opening 34, liquid outlet opening 35, fluid circulation port 350 and magnetic force cover 4 form an airtight medium circulation space.Front pump cover 1, middle pump body 2, the rear pump housing 3 align connected by the locating stud 7 being located at these both sides, medium circulation space by two respectively, and are locked by two fixing rods 8.
With reference to Fig. 1, first, second seal ring 130,360 described is Teflon seal ring, EPDM seal ring or Viton seal ring.
With reference to Fig. 5, Fig. 7 and Fig. 8, in described front wheel driving axis hole 11, front driven-shaft hole 12, rear driving axis hole 31 and rear driven-shaft hole 32, be equipped with axle sleeve 9.Described live axle 210 and driven shaft 220 are made by pottery.
In addition, the Teflon in described Teflon seal ring refers to teflon, has the feature of antiacid alkali resistant, anti-various organic solvent, is dissolved in all solvents hardly.EPDM in described EPDM seal ring refers to ethylene propylene diene rubber (Ethylene Propylene Diene Monomer), because its main chain is made up of chemically stable saturated hydrocarbon, only in side chain containing unsaturated double-bond, therefore its resistance to ozone, the ageing-resistant performance such as heat-resisting, weather-proof are excellent.Viton in described Viton seal ring refers to rubber fluorine-containing in molecule, has heat-resisting quantity, chemical resistance, resistance to most of oil and solvent, weatherability and ozone resistance.The selection of seal ring can be carried out according to different medium, to prevent gear pump medium from leaking, and increase the working life of gear pump.
First, second circular groove described also can be the circular groove of other closed hoops such as ellipse, polygonal.
Above are only the specific embodiment of the present invention, but design concept of the present invention is not limited thereto, all changes utilizing this design the present invention to be carried out to unsubstantiality, all should belong to the behavior of invading scope.
Claims (10)
1. a Mini gear pump, comprise the pump housing, this pump housing comprises front pump cover, middle pump body, the rear pump housing, intermeshing actuation gear and driven gear is provided with in the gear cavity of described middle pump body, a live axle is fixed with in described actuation gear, a driven shaft is fixed with in described driven gear, described live axle is connected with power mechanism, it is characterized in that: the side being centrally located at the middle pump body center of circle of described gear cavity, the trailing flank of described front pump cover is provided with the first circular groove, the first seal ring is provided with in this first circular groove, the front-end face of this first seal ring and middle pump body compresses and is surrounded on outside gear cavity, the leading flank of the described rear pump housing is provided with the second circular groove, the second seal ring is provided with in this second circular groove, the trailing flank of this second seal ring and middle pump body compresses and is surrounded on outside gear cavity.
2. a kind of Mini gear pump as claimed in claim 1, is characterized in that: the center of circle of described actuation gear overlaps with the center of circle of middle pump body.
3. a kind of Mini gear pump as claimed in claim 1, is characterized in that: first, second seal ring described is Teflon seal ring, EPDM seal ring or Viton seal ring.
4. a kind of Mini gear pump as claimed in claim 1, is characterized in that: by two locating studs, front pump cover, middle pump body, the alignment of the rear pump housing are connected, and are locked by two fixing rods in the described pump housing.
5. a kind of Mini gear pump as claimed in claim 1, it is characterized in that: described power mechanism comprises inner magnetic region, magnetic force cover is covered with outside this inner magnetic region, this magnetic force cover is fixedly connected on the rear portion of the rear pump housing by gland, and this magnetic force enclosure is located in a motor, is provided with the axis hole fixing fit with live axle in described inner magnetic region.
6. a kind of Mini gear pump as claimed in claim 5, it is characterized in that: be provided with for plugging live axle and the rear driving axis hole that communicates of front and back in the described rear pump housing, with the rear driven-shaft hole for plugging driven shaft, this rear driven-shaft hole rear end is communicated with the axle Posterior circle hole that a diameter is less than rear driven-shaft hole, and this axle Posterior circle hole passes into magnetic force cover from the rear side of the rear pump housing; Be provided with suction port and exhaust port in the described rear pump housing, described suction port is communicated with an inlet opening, and described exhaust port is communicated with a liquid outlet opening, is communicated with a fluid circulation port after this liquid outlet opening, and this fluid circulation port passes into magnetic force cover from the rear side of the rear pump housing.
7. a kind of Mini gear pump as claimed in claim 6, it is characterized in that: described gear cavity both sides are respectively lead channel and liquid outlet groove, circulation port before described front pump cover is provided with and is communicated with this liquid outlet groove, and the front wheel driving axis hole that is communicated with of circulation port front with this and front driven-shaft hole respectively.
8. a kind of Mini gear pump as claimed in claim 1, is characterized in that: described live axle and driven shaft are made by pottery.
9. a kind of Mini gear pump as claimed in claim 7, is characterized in that: be equipped with axle sleeve in described front wheel driving axis hole, front driven-shaft hole, rear driving axis hole and rear driven-shaft hole.
10. a kind of Mini gear pump as claimed in claim 6, is characterized in that: the trailing flank of the described rear pump housing offers a toroidal cavity coordinated with magnetic force cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510416685.2A CN104963854A (en) | 2015-07-16 | 2015-07-16 | Micro gear pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510416685.2A CN104963854A (en) | 2015-07-16 | 2015-07-16 | Micro gear pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104963854A true CN104963854A (en) | 2015-10-07 |
Family
ID=54217909
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510416685.2A Pending CN104963854A (en) | 2015-07-16 | 2015-07-16 | Micro gear pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104963854A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112727750A (en) * | 2021-01-05 | 2021-04-30 | 绍兴泰格机电技术有限公司 | Gear pump and preparation process thereof |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5762485A (en) * | 1996-09-06 | 1998-06-09 | Eastman Kodak Company | Zirconia and zirconia composite ceramic shafts for gear micropumps and method of making same |
| JP2009162056A (en) * | 2007-12-28 | 2009-07-23 | C I Kasei Co Ltd | Ultramicro-pump |
| CN201599185U (en) * | 2009-12-08 | 2010-10-06 | 四川达宇特种车辆制造厂 | Miniature external-gearing spur-gear cylindrical gear pump |
| CN103939334A (en) * | 2013-01-17 | 2014-07-23 | 常州雷利电机科技有限公司 | Novel gear pump |
| CN203809291U (en) * | 2014-04-15 | 2014-09-03 | 宁波宝新不锈钢有限公司 | Sealing structure for eliminating oil leakage at end surface of gear pump |
| CN203962384U (en) * | 2014-07-05 | 2014-11-26 | 雷鸣 | A kind of Mini gear pump of resistance to grinding |
| CN204458338U (en) * | 2014-12-22 | 2015-07-08 | 泰力(北京)精密机电有限公司 | A kind of Mini gear pump |
| CN204900239U (en) * | 2015-07-16 | 2015-12-23 | 三明索富泵业有限公司 | Micro -gear pump |
-
2015
- 2015-07-16 CN CN201510416685.2A patent/CN104963854A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5762485A (en) * | 1996-09-06 | 1998-06-09 | Eastman Kodak Company | Zirconia and zirconia composite ceramic shafts for gear micropumps and method of making same |
| JP2009162056A (en) * | 2007-12-28 | 2009-07-23 | C I Kasei Co Ltd | Ultramicro-pump |
| CN201599185U (en) * | 2009-12-08 | 2010-10-06 | 四川达宇特种车辆制造厂 | Miniature external-gearing spur-gear cylindrical gear pump |
| CN103939334A (en) * | 2013-01-17 | 2014-07-23 | 常州雷利电机科技有限公司 | Novel gear pump |
| CN203809291U (en) * | 2014-04-15 | 2014-09-03 | 宁波宝新不锈钢有限公司 | Sealing structure for eliminating oil leakage at end surface of gear pump |
| CN203962384U (en) * | 2014-07-05 | 2014-11-26 | 雷鸣 | A kind of Mini gear pump of resistance to grinding |
| CN204458338U (en) * | 2014-12-22 | 2015-07-08 | 泰力(北京)精密机电有限公司 | A kind of Mini gear pump |
| CN204900239U (en) * | 2015-07-16 | 2015-12-23 | 三明索富泵业有限公司 | Micro -gear pump |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112727750A (en) * | 2021-01-05 | 2021-04-30 | 绍兴泰格机电技术有限公司 | Gear pump and preparation process thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20151104 Address after: Fujian 365000 Sanming City province Meliet District greenstone village 92 Applicant after: SANMING SUOFU PUMP INDUSTRY CO., LTD. Address before: Fujian 365000 Sanming City province Meliet District greenstone village 92 Applicant before: SANMING BRANCH, SHANGHAI SUPER FLUID COMPANY |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151007 |