CN104565751A - Double-tooth-difference cycloidal gear pump - Google Patents
Double-tooth-difference cycloidal gear pump Download PDFInfo
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- CN104565751A CN104565751A CN201510012267.7A CN201510012267A CN104565751A CN 104565751 A CN104565751 A CN 104565751A CN 201510012267 A CN201510012267 A CN 201510012267A CN 104565751 A CN104565751 A CN 104565751A
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Abstract
The invention relates to a double-tooth-difference cycloidal gear pump. The double-tooth-difference cycloidal gear pump comprises a pump base, a pump cover, a pump shaft, an internal rotor and an external rotor. The pump base and the pump cover are connected and combined into a sealed housing; the internal rotor and the external rotor are arranged inside the housing; the number of teeth of the internal rotor is at least 5, and the external rotor has two more teeth than the internal rotor; the internal side surface of the pump base is provided with a crescent plate; the pump cover is provided with an oil suction inlet and an oil pumping inlet. The double-tooth-difference cycloidal gear pump is an improvement on the basis of a one-tooth-difference cycloidal gear pump, achieves self-lubrication and meanwhile has the advantages of being small in size, light in weight, large in flow and high in reliability.
Description
Technical field
The present invention relates to a kind of gear pump, especially a kind of two tooth-difference cycloid gear pump.
Background technique
Cycloid rotor gear pump is high due to compact structure, efficiency, is widely used in oil pump or other civilian fluid conveying industries of automobile.In the industry field that ask for something fluid feed flow is large, a tooth-difference cycloid pump is widely used.Conventional way is the size increasing the pump housing and phase gear, and can arrange multistage, this also will increase the volume and weight of product.At such as aviation field, sometimes require the lightweight of product, volume is little, will have larger fluid feed flow simultaneously.In existing product, cannot index be met the requirements of, in various data document, not have ripe technology can be for reference,
Summary of the invention
The object of this invention is to provide a kind of gear pump, can meet a tooth-difference cycloid pump and to be beyond one's reach technical requirements, namely volume is little, lightweight, and has larger dose of fluid delivered.
Technological scheme of the present invention is, two tooth-difference cycloid gear pump comprises pump seat, pump cover, pump shaft, internal rotor, external rotor, the housing of pump seat and pump cover Connecting groups synthesis sealing, inside is provided with internal rotor and external rotor, described internal rotor is arranged on pump shaft and also can rotates with pump shaft, pump shaft extends to pump cover outside and is connected with power input shaft, internal rotor periphery is provided with cycloid external tooth, external rotor inside is provided with the cycloid internal tooth being provided with cycloid external tooth with internal rotor periphery and being meshed, outside is circular and coordinates with pump seat inwall, and under the effect of internal rotor, rotate along inwall in pump seat inside, the tooth of described internal rotor is at least 5, many two of the tooth of the number ratio internal rotor of the tooth of external rotor, described is provided with swing link in pump seat inner side, described swing link and internal rotor, external rotor forms airtight oil pocket, internal rotor and external rotor are in engagement process, the cavity volume formed between the tooth top of internal rotor and the tooth root of external rotor constantly changes, the pump cover of the position that cavity volume increases gradually is provided with inlet port, the pump cover of the position that cavity volume reduces gradually is provided with pump hydraulic fluid port.Pump shaft is arranged on pump seat and pump cover respectively by sliding bearing, is also provided with seal arrangement between pump shaft and pump seat, and described seal arrangement is positioned at the end of pump shaft, is provided with the oil circuit leading to lubricating oil pump outside between seal arrangement and the sliding bearing of pump seat.Described seal arrangement comprises the leather cup seat be arranged on pump seat and the leather cup be arranged on leather cup seat, and described leather cup inner ring cooperation is arranged on the external diameter of pump shaft.The external diameter of leather cup seat is also provided with cushion rubber.On pump shaft power input shaft and and internal rotor between, be provided with a reduced diameter section, internal rotor is connected by interference or spline mode.Described internal rotor and external rotor are multistage layout, and inlet port and the pump hydraulic fluid port of every one-level communicate.
In the present invention incites somebody to action, outer rotor teeth difference is set to two, external rotor is driven by internal rotor in working procedure, the volume of continually varying is formed between internal rotor tooth top and external rotor tooth root, fluid is sucked, simultaneously, when lubricating oil pump works, the lubricating oil of high-voltage oil cavity can to the Clearance Flow formed between sliding bearing, form oil film and realize lubrication, oil seal prevents lubricating oil to be leaked to outside casing by seal arrangement within the scope of pump seat, this part lubricating oil is back in casing by oil circuit, the reduced diameter section that pump shaft is arranged, can lubricating oil pump inner stuck when, rupture voluntarily, each parts in protection pump.The present invention improves on the basis of a tooth-difference cycloid pump, while can realizing selflubricating, has that volume is little, lightweight, flow is large, the feature of good reliability.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the side view of Fig. 1;
Fig. 3 is the structural representation of internal rotor of the present invention, external rotor and swing link.
Embodiment
As shown in the figure, two tooth-difference cycloid gear pump comprises pump seat 1, pump cover 2, pump shaft 3, internal rotor 5, external rotor 6, the housing of pump seat 1 and pump cover 2 Connecting groups synthesis sealing, inside is provided with internal rotor 5 and external rotor 6, described internal rotor 5 is arranged on pump shaft 3 and also can rotates with pump shaft 3, pump shaft 3 extends to pump cover 2 outside and is connected with power input shaft, internal rotor 5 periphery is provided with cycloid external tooth, external rotor 6 inside is provided with the cycloid internal tooth being provided with cycloid external tooth with internal rotor 5 periphery and being meshed, outside is circular and coordinates with pump seat 1 inwall, and under the effect of internal rotor 5, rotate along inwall in pump seat 1 inside, the tooth of described internal rotor 5 is at least 5, many two of the tooth of the number ratio internal rotor 5 of the tooth of external rotor 6, described is provided with swing link 12 in pump seat 1 inner side, described swing link 12 and internal rotor 5, external rotor 6 forms airtight oil pocket, internal rotor 5 and external rotor 6 are in engagement process, the cavity volume formed between the tooth top of internal rotor 5 and the tooth root of external rotor 6 constantly changes, the pump cover 2 of the position that cavity volume increases gradually is provided with inlet port 13, the pump cover of the position that cavity volume reduces gradually is provided with pump hydraulic fluid port 14.Pump shaft 3 is arranged on pump seat 1 and pump cover 2 respectively by sliding bearing 7, also seal arrangement is provided with between pump shaft 3 and pump seat 1, described seal arrangement is positioned at the end of pump shaft 3, is provided with the oil circuit 8 leading to lubricating oil pump outside between seal arrangement and the sliding bearing of pump seat 1.Described seal arrangement comprises the leather cup seat 10 be arranged on pump seat 1 and the leather cup 9 be arranged on leather cup seat 10, and described leather cup 9 inner ring cooperation is arranged on the external diameter of pump shaft 3.The external diameter of leather cup seat 10 is also provided with cushion rubber 11.On pump shaft 3 power input shaft and and internal rotor 5 between, be provided with a reduced diameter section 4, internal rotor 5 is connected by interference or spline mode.Described internal rotor 5 and external rotor 6 are multistage layout, and inlet port 13 and the pump hydraulic fluid port 14 of every one-level communicate.
Claims (7)
1. a two tooth-difference cycloid gear pump, it is characterized in that, described gear pump comprises pump seat (1), pump cover (2), pump shaft (3), internal rotor (5), external rotor (6), the housing of pump seat (1) and pump cover (2) Connecting groups synthesis sealing, inside is provided with internal rotor (5) and external rotor (6), described internal rotor (5) is arranged on pump shaft (3) and above also can rotates with pump shaft (3), pump shaft (3) extends to pump cover (2) outside and is connected with power input shaft, internal rotor (5) periphery is provided with cycloid external tooth, external rotor (6) inside is provided with the cycloid internal tooth being provided with cycloid external tooth with internal rotor (5) periphery and being meshed, outside is circular and coordinates with pump seat (1) inwall, and under the effect of internal rotor (5), rotate along inwall in pump seat (1) inside, the tooth of described internal rotor (5) is at least 5, many two of the tooth of the number ratio internal rotor (5) of the tooth of external rotor (6), described is provided with swing link (12) in pump seat (1) inner side, described swing link (12) and internal rotor (5), external rotor (6) forms airtight oil pocket, internal rotor (5) and external rotor (6) are in engagement process, the cavity volume formed between the tooth top of internal rotor (5) and the tooth root of external rotor (6) constantly changes, the pump cover (2) of the position that cavity volume increases gradually is provided with filler opening (13), the pump cover of the position that cavity volume reduces gradually is provided with oil outlet (14).
2. two tooth-difference cycloid gear pump as claimed in claim 1, it is characterized in that, described pump shaft (3) is arranged on pump seat (1) and pump cover (2) respectively by sliding bearing (7), also seal arrangement is provided with between pump shaft and pump seat, described seal arrangement is positioned at the end of pump shaft, is provided with the oil circuit (8) leading to lubricating oil pump outside between seal arrangement and the sliding bearing (7) of pump seat.
3. two tooth-difference cycloid gear pump as claimed in claim 2, it is characterized in that, described seal arrangement comprises the leather cup seat (10) be arranged on pump seat (1) and the leather cup (9) be arranged on leather cup seat (10), and described leather cup (9) inner ring cooperation is arranged on the external diameter of pump shaft (3).
4. two tooth-difference cycloid gear pump as claimed in claim 3, it is characterized in that, described is also provided with cushion rubber (11) on the external diameter of leather cup seat (10).
5. two tooth-difference cycloid gear pump as claimed in claim 1, is characterized in that, described pump shaft (3) is positioned at and power input shaft and and internal rotor (5) between, be provided with a reduced diameter section (4).
6. two tooth-difference cycloid gear pump as claimed in claim 1, it is characterized in that, described internal rotor (5) is connected by interference or spline mode.
7. two tooth-difference cycloid gear pump as claimed in claim 1, it is characterized in that, described internal rotor (5) and external rotor (6) are multistage layout, and inlet port (13) and the pump hydraulic fluid port (14) of every one-level communicate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510012267.7A CN104565751A (en) | 2015-01-09 | 2015-01-09 | Double-tooth-difference cycloidal gear pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510012267.7A CN104565751A (en) | 2015-01-09 | 2015-01-09 | Double-tooth-difference cycloidal gear pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104565751A true CN104565751A (en) | 2015-04-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510012267.7A Pending CN104565751A (en) | 2015-01-09 | 2015-01-09 | Double-tooth-difference cycloidal gear pump |
Country Status (1)
| Country | Link |
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| CN (1) | CN104565751A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106051442A (en) * | 2016-08-17 | 2016-10-26 | 湖南机油泵股份有限公司 | Speed changer oil pump not prone to oil leakage |
| CN108870054A (en) * | 2018-06-13 | 2018-11-23 | 中国北方发动机研究所(天津) | It is a kind of can draining high speed measurement of power machine support |
| CN111486329A (en) * | 2020-03-30 | 2020-08-04 | 湖南湘衡泵业有限责任公司 | Controllable oil pump of environmental protection function emission has |
| CN112012831A (en) * | 2020-08-28 | 2020-12-01 | 中国航发贵阳发动机设计研究所 | Combined type aero-engine lubricating oil accessory |
| CN114776581A (en) * | 2022-06-07 | 2022-07-22 | 河南航天液压气动技术有限公司 | Multi-stage output cycloid pump |
-
2015
- 2015-01-09 CN CN201510012267.7A patent/CN104565751A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106051442A (en) * | 2016-08-17 | 2016-10-26 | 湖南机油泵股份有限公司 | Speed changer oil pump not prone to oil leakage |
| CN108870054A (en) * | 2018-06-13 | 2018-11-23 | 中国北方发动机研究所(天津) | It is a kind of can draining high speed measurement of power machine support |
| CN111486329A (en) * | 2020-03-30 | 2020-08-04 | 湖南湘衡泵业有限责任公司 | Controllable oil pump of environmental protection function emission has |
| CN111486329B (en) * | 2020-03-30 | 2022-02-11 | 湖南湘衡泵业有限责任公司 | Controllable oil pump of environmental protection function emission has |
| CN112012831A (en) * | 2020-08-28 | 2020-12-01 | 中国航发贵阳发动机设计研究所 | Combined type aero-engine lubricating oil accessory |
| CN114776581A (en) * | 2022-06-07 | 2022-07-22 | 河南航天液压气动技术有限公司 | Multi-stage output cycloid pump |
| CN114776581B (en) * | 2022-06-07 | 2024-05-24 | 河南航天液压气动技术有限公司 | Multistage output cycloidal pump |
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Application publication date: 20150429 |