CN203146313U - Internally-meshed gear pump - Google Patents
Internally-meshed gear pump Download PDFInfo
- Publication number
- CN203146313U CN203146313U CN 201320059431 CN201320059431U CN203146313U CN 203146313 U CN203146313 U CN 203146313U CN 201320059431 CN201320059431 CN 201320059431 CN 201320059431 U CN201320059431 U CN 201320059431U CN 203146313 U CN203146313 U CN 203146313U
- Authority
- CN
- China
- Prior art keywords
- gear
- gear ring
- pump
- internally
- ring
- 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 - Lifetime
Links
- 238000012937 correction Methods 0.000 claims description 5
- 238000012986 modification Methods 0.000 abstract description 2
- 230000004048 modification Effects 0.000 abstract description 2
- 230000007547 defect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 7
- 229920006351 engineering plastic Polymers 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229920000049 Carbon (fiber) Polymers 0.000 description 3
- 239000004809 Teflon Substances 0.000 description 3
- 229920006362 Teflon® Polymers 0.000 description 3
- 239000004917 carbon fiber Substances 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Images
Landscapes
- Rotary Pumps (AREA)
Abstract
The utility model provides an internally-meshed gear pump, aiming at the defects in the prior art. The internally-meshed gear pump is a small-sized pump and can be used in an occasion which has a narrow space and high requirement on output pressure, the output pressure is higher than 5.5bar, and the flow keeps at about 35L/h under high pressure, the error is not more than 1%. According to the utility model, the internally-meshed gear pump comprises a front end cover, a gear ring, a gear wheel and a shaft, wherein the gear wheel is a driving member and is positioned by the shaft, shifting forks to be connected with an external power are arranged on the gear wheel; the gear ring is a driven member and is in clearance fit with the front end cover; the gear ring is meshed with the gear wheel to obtain a circular arc tooth profile which is subjected to profile modification and back gouging by a tooth root.
Description
Technical field
The utility model relates to the gear pump technical field, refers in particular to a kind of crescent gear pump.
Background technique
The tooth-shape structure that existing crescent gear pump adopts, when needs used in the demanding occasion of delivery pressure, its flow was little, sealing is poor, error is bigger, and it is comparatively serious to wear and tear.
Summary of the invention
The purpose of this utility model is at the deficiencies in the prior art, a kind of crescent gear pump is provided, the meshed gears pump is miniature pump in this, it is narrow and small to can be used on the space, the demanding occasion of delivery pressure, its delivery pressure can reach more than the 5.5bar, and the high pressure down-off is stabilized in about 35L/h, and error is no more than 1%.
The purpose of this utility model is achieved in that a kind of crescent gear pump, and it comprises front cover, gear ring, gear, axle; Described gear is driving link, positions by described axle, and described gear is provided with and can connects powered attendant-controlled wheelchairs shift fork; Described gear ring is driven member, with described front cover Spielpassung; Described gear ring and described gear have and are meshing with each other and arc toothed through tooth root correction of the flank shape and back chipping.The engagement process of the utility model gear and gear ring is the circular arc engagement, and the design method of the profile of tooth of gear and gear ring is: gear ring draws tooth root correction of the flank shape and back chipping by the gear engagement.There are the gap in the tooth root of gear and the tooth top of gear ring, be equivalent to one group of tooth bar, be distributed on the small circumference, engagement process is not that arc surface is done pure rolling in the plane, but subsidiary small slippage, the reason that has this phenomenon is that two gears rotate around the different centers of circle respectively, and contact points distance center of circle difference separately can produce the trace wearing and tearing thus.
Further scheme of the present utility model is: the gear ratio of described gear and described gear ring is 10/11.Because profile of tooth engagement line length, engagement process are the circular arc engagement again, the profile of tooth selfsealings are good, and the engagement difference in volume is S=7.46, and low-pressure cavity and hyperbaric chamber are isolated good, and the gear pump transmission is stable.
Further scheme of the present utility model is: the shift fork that arranges in the described gear is three lobe shift forks, and shift fork rotates under external force and driven gear rotates.During proper functioning, shift fork rotates under external force and driven gear rotates, and gear and gear ring engagement simultaneously drives the rotation of gear ring.By volume-variation constantly, the cavity volume volume that gear and gear ring form constantly changes, and forms hyperbaric chamber and low-pressure cavity continuously, low-viscosity (mobile) liquid is sucked by the runner of entrance via low-pressure cavity, and by the volume compression, transfer out by hyperbaric chamber with high voltage style, finish once circulation.
Further scheme of the present utility model is: described gear and gear ring material are the special engineering plastics of carbon fiber-containing, graphite, teflon, and this material can be realized selflubricating, the wear-resisting property excellence, and the life-span is long.
The interior meshed gears gear ring that the utility model is compared other has following some advantage: 1, contrast cycloid, asymptotic profile of tooth, and the arc toothed pulsating quantity of the utility model is little, and flow is big, engagement line length, profile of tooth good airproof performance, fluid pressure height; 2, the special engineering plastics injection moulding of carbon fiber-containing, graphite, teflon processing can realize selflubricating, the wear-resisting property excellence, and the life-span is long; 3, gear train accuracy of manufacturing and the technological requirement of high-precision measuring pump are high, and matching gap has reached the um level, have structurally realized the precision of little leakage or zero leakage, thereby have guaranteed to carry the operating mode of low viscosity solution.Simultaneously, profile of tooth engagement line length, the profile of tooth selfsealings are good, and low-pressure cavity and hyperbaric chamber are isolated good, and transmission is stable.
The employing of the utility model material is high temperature resistant, the special engineering plastics of wear resistant corrosion resistant, and physiological compatibility is good, the precision height, and leakage rate is little, thereby has guaranteed to carry the operating mode of low viscosity solution.
Description of drawings
Fig. 1 the utility model structural principle schematic representation
Fig. 2 the utility model gear-wheel gear-ring tooth curve schematic representation
In Fig. 1,2,1-front cover, 2-gear ring, 3-gear, 4-axle, 5-shift fork.
Embodiment
Embodiment one:
As shown in Figure 1, the gears for internal gear pump system comprises the 1-front cover, 2-gear ring, 3-gear, 4-axle, 5-shift fork; Gear 3 is installed on the axle 4, gear ring 2 and front cover 1 Spielpassung, and gear 3 is meshing with each other.
As shown in Figure 2, the pitch curve of gear 3 and gear ring 2, gear ring 2 draws tooth root correction of the flank shape and back chipping by gear 3 engagements.
The design method of the profile of tooth of the utility model gear ring 2 and gear 3 is: gear ring 2 draws tooth root correction of the flank shape and back chipping by gear 3 engagements.There is the gap in the tooth top of the tooth root of gear 3 and gear ring 2, and the engagement difference in volume is S=7.46, and engagement process is the circular arc engagement, engagement line length, good airproof performance.The special engineering plastics injection moulding processing that gear 3 and gear ring 2 adopt carbon fiber-containing, graphite, teflon can realize selflubricating, the wear-resisting property excellence, and the life-span is long.
In this specification, the utility model is described with reference to its certain embodiments.But, still can make various modifications and conversion obviously and not deviate from spirit and scope of the present utility model.Therefore, specification and accompanying drawing are regarded in an illustrative, rather than a restrictive.
Claims (3)
1. a crescent gear pump is characterized in that it comprises: front cover, gear ring, gear, axle; Described gear is driving link, positions by described axle, and described gear is provided with and can connects powered attendant-controlled wheelchairs shift fork; Described gear ring is driven member, with described front cover Spielpassung; Described gear ring and described gear have and are meshing with each other and arc toothed through tooth root correction of the flank shape and back chipping.
2. crescent gear pump as claimed in claim 1, it is characterized in that: the gear ratio of described gear and described gear ring is 10/11.
3. crescent gear pump as claimed in claim 1 is characterized in that: the shift fork that arranges in the described gear is three lobe shift forks, and shift fork rotates under external force and driven gear rotates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320059431 CN203146313U (en) | 2013-02-04 | 2013-02-04 | Internally-meshed gear pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320059431 CN203146313U (en) | 2013-02-04 | 2013-02-04 | Internally-meshed gear pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203146313U true CN203146313U (en) | 2013-08-21 |
Family
ID=48973843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320059431 Expired - Lifetime CN203146313U (en) | 2013-02-04 | 2013-02-04 | Internally-meshed gear pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203146313U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103586589A (en) * | 2013-11-11 | 2014-02-19 | 沈阳黎明航空发动机(集团)有限责任公司 | Plate-type high-precision clamp special for laser processing |
| CN104791244A (en) * | 2015-04-22 | 2015-07-22 | 嘉兴东唐汽车科技有限公司 | Internal gear pump applied to SCR system |
| CN107905997A (en) * | 2017-10-19 | 2018-04-13 | 浙江大学 | A kind of gear ring structure of anti abrasive Internal Gear Pump Used in Water Hydraulics |
| CN110185609A (en) * | 2019-06-18 | 2019-08-30 | 江苏德华泵业有限公司 | A kind of high-pressure gear sewage pump |
-
2013
- 2013-02-04 CN CN 201320059431 patent/CN203146313U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103586589A (en) * | 2013-11-11 | 2014-02-19 | 沈阳黎明航空发动机(集团)有限责任公司 | Plate-type high-precision clamp special for laser processing |
| CN104791244A (en) * | 2015-04-22 | 2015-07-22 | 嘉兴东唐汽车科技有限公司 | Internal gear pump applied to SCR system |
| CN107905997A (en) * | 2017-10-19 | 2018-04-13 | 浙江大学 | A kind of gear ring structure of anti abrasive Internal Gear Pump Used in Water Hydraulics |
| CN107905997B (en) * | 2017-10-19 | 2019-03-08 | 浙江大学 | A wear-resistant ring gear structure of a water-hydraulic internal meshing gear pump |
| CN110185609A (en) * | 2019-06-18 | 2019-08-30 | 江苏德华泵业有限公司 | A kind of high-pressure gear sewage pump |
| CN110185609B (en) * | 2019-06-18 | 2024-04-16 | 江苏德华泵业有限公司 | High-pressure gear sewage pump |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203146313U (en) | Internally-meshed gear pump | |
| CN101435425B (en) | Novel tooth form of screw rod rotor of double-screw compressor | |
| CN103062348A (en) | Anti-backlash transmission comprising trochoid gears and roll pins with conical teeth | |
| CN101705937A (en) | Skewed tooth gear pump | |
| CN208106751U (en) | Gear pump coupling flute profile helical gear rotor | |
| CN104879298A (en) | Variable displacement gear pump | |
| CN201176930Y (en) | Gear ring pump | |
| CN109763975A (en) | A kind of oil pump for DCT automatic transmission | |
| CN205533238U (en) | A circular arc molded lines screw rotor for screw vacuum pump | |
| CN202833121U (en) | Circular gear pump | |
| CN103912485A (en) | High-flow and low-pulsation gear pump with compact structure | |
| CN101566147A (en) | Volume type five-screw pump for delivering oil | |
| CN203098277U (en) | Oil outlet cavity sealing ring of lower cover body of gear hydraulic pump | |
| CN201896741U (en) | Oil pump of automobile automatic transmission | |
| CN105298834B (en) | A kind of external gear rotary pump that can be used in rotating | |
| CN101713400A (en) | Tooth-shaped screw rod with strict sealing and approximate dynamic balance | |
| CN216381843U (en) | External gear pump using logarithmic spiral molded line gear | |
| CN210889307U (en) | Screw molded line of four-screw pump | |
| CN202646002U (en) | Tooth profile structure of linear conjugate internal gear pair | |
| CN203362507U (en) | Novel cycloid rotor pump | |
| CN203098268U (en) | Flow path system of high-precision metering pump | |
| CN201925159U (en) | Different teeth pump | |
| CN2229555Y (en) | Internal gearing rotary pump | |
| CN203847382U (en) | Structure compact type high-flow low-pulse gear pump | |
| CN110552879B (en) | Four-screw pump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130821 |