CN101900110A - Eccentric double-cycloid rotor pump - Google Patents
Eccentric double-cycloid rotor pump Download PDFInfo
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- CN101900110A CN101900110A CN 201010241947 CN201010241947A CN101900110A CN 101900110 A CN101900110 A CN 101900110A CN 201010241947 CN201010241947 CN 201010241947 CN 201010241947 A CN201010241947 A CN 201010241947A CN 101900110 A CN101900110 A CN 101900110A
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Abstract
The invention relates to a hydraulic transmission device, in particular to a hydraulic pump with the cycloid rotor structure. The eccentric double-cycloid rotor pump comprises a front cover (10), a shell (9), a rear cover (11) and a transmission shaft (9) which is arranged at the centre of a circle and extends in the shell (9), wherein the corresponding number of pins (6) are distributed on the concentric circumferences of the front cover (10) or rear cover (11); a sleeve (7) of which internal diameter is more than the external diameter of the pins (6) is sleeved on each pin (6); and the annular outer rotor (8) of a curtate hypocycloidal gear is sleeved on the outside of the circumference of the sleeve (7). The invention is characterized in that the inner rotor (5) of a curtate epicycloidal gear is sleeved on an eccentric shaft (3) which deviates form the connecting shaft of a transmission shaft (1). By adopting the eccentric shaft structure, the rotor pump has new characteristics on the original basis while the original advantages are maintained; and the axes of the inner and outer rotor have a certain eccentric distance, and the larger the centric distance is, the higher the flow is, thus higher flow can be obtained.
Description
Technical field
The present invention is a hydraulic transmission, particularly relates to a kind of oil hydraulic pump of cycloid rotor type structure.
Background technique
At present, Chang Yong hydraulic-pressure pump has gear pump, vane pump, plunger pump, cycloid rotor type pump.Every kind of pump has pluses and minuses.
There is " pocketed oil " in gear pump, hydraulic radial force unbalance, problem such as flow pulsation is big." pocketed oil " makes gear and bearing produce very big additional load, and bearing life is short, and oil pump efficient is low.In addition, " pocketed oil " also can make oily temperature rise, is easy to generate bubble, bubble breaks and causes big noise.The hydraulic radial force unbalance makes gear shaft be subjected to flecition, and oil sucting cavity gear radial clearance diminishes, and gear and pump housing inner chamber produce friction or stuck, make the oil pump cisco unity malfunction.Because after hydraulic oil sucks oil pocket, nearly 180 ° along with the rotation of gear, push away again after being transported to pumping cavity, and the gear denticle occupies certain space again, so flowed fluctuation is big, pressure surge is big, causes that impact, vibration and noise are big.
Vane pump complex structure, manufacturing difficulty to the rotating speed sensitivity of axle, with too slow equal cisco unity malfunction, require height to oil too soon, and easy stuck blade causes rapid wearing and tearing behind the sump oil.During high speed, the pressure reduction at blade two ends easily causes the leaf abscission stator surface, causes blade to come to nothing.Under the high pressure, blade and stator surface are easy to wear.Compare with gear pump, noise is big.
The plunger pump complex structure, part is many, makes difficulty, and how the price height is as high-pressure service pump.Similar with vane pump, this pump requires high to oil, easy stuck plunger behind the sump oil.Because the to-and-fro motion of plunger is at a high speed unsuitable.
The patent No. 200710048156.7 " double-cycloid rotor pump " discloses a kind of structure of double-cycloid rotor pump, double-cycloid rotor pump, comprise protecgulum, housing, bonnet and be positioned at a center that stretch into the transmission shaft of housing, described transmission shaft is fixedlyed connected with the internal rotor of curtate epicycloid gear is coaxial; On described protecgulum or bonnet, the pin of respective numbers is set with distributing on the circumference of internal rotor concentric; Be nested with the sleeve of internal diameter on each pin greater than the pin external diameter; The peripheral socket of forming circumference at sleeve is circular external rotor, and external rotor is the corresponding curtate hypocycloid gear in inner ring and internal rotor outer ring.The inner and outer rotors dead in line can obtain tiny flow quantity, and makes compact structure simple, and volume is little, and installation and processing is easy, and cost is low.Each work tooth cavity be oil sucting cavity be again pumping cavity, when one work tooth cavity be oil sucting cavity, another work tooth cavity is an oil-discharging cavity, suction oil carries out simultaneously.Rotation of inner rotor, each tooth cavity of working is progressive continuously by the process that oil suction (or oil extraction) changes oil extraction (or oil suction) over to, and whenever there is a work tooth cavity to change oil extraction (or oil suction) over to by oil suction (or oil extraction), meanwhile, just have another work tooth cavity and change oil suction (or oil extraction) over to by oil extraction (or oil suction), whole process all hockets continuously, so flowed fluctuation is little.
Yet, this patent also has the limitation part, it is only applicable to the occasion of micro-flow, can reach the purpose that pressure oil steadily, precisely is provided, and when needs provide big flow, from the usual design philosophy of cycloid rotor pump, can only increase its specification, volume, the consequence of bringing thus is that equipment heaviness, consumptive material are many, and operating cost is big
Summary of the invention
The objective of the invention is to avoid providing big flow double-cycloid rotor pump in the mode that increases volume, specification in the prior art, provide a kind of double-cycloid rotor pump structure in the mode that reduces volume, saving energy consumption.
Purpose of the present invention is achieved by following technological scheme:
A kind of eccentric double-cycloid rotor pump comprises protecgulum, housing, bonnet and is positioned at the center of circle, stretches into the transmission shaft of housing;
On described protecgulum or bonnet, distributing on the circumference of concentric is provided with the pin of respective numbers; Be nested with the sleeve of internal diameter on each pin greater than the pin external diameter; The peripheral socket of forming circumference at sleeve is external rotor circular, the curtate hypocycloid gear;
It is characterized in that: be connected the eccentric shaft that the axle center is offset mutually with transmission shaft, on eccentric shaft, rotate the internal rotor that is nested with the curtate epicycloid gear.
Further, the offset distance of described eccentric shaft satisfies, and external rotor inner ring and internal rotor outer ring contact tangent at the opposite direction that is positioned at the eccentric shaft skew with the sleeve cylindrical.
Further, the described internal rotor gear number of teeth adds the 2 gear numbers of teeth that equal described external rotor.
Further, the quantity of described pin is smaller or equal to the gear number of teeth sum of 1/2nd internal rotor gear numbers of teeth and external rotor.
Further, the difference of described sleeve diameter and pin external diameter equals the throw of eccentric of 1/2nd internal rotors and external rotor.If sleeve endoporus radius R, pin radius r, throw of eccentric 2a, then R=r+a.
Adopt the technical program, internal rotor, sleeve, external rotor are meshing with each other, and form a plurality of tooth cavities that independently seal.Transmission shaft drives internal rotor by eccentric shaft and does planetary motion, both when transmission shaft revolves round the sun, again around the eccentric shaft rotation.The internal rotor drive spool is around the pin rotation motion, and it is moving that sleeve drives external rotor again.Along with the rotation of internal rotor, sleeve and external rotor, the volume of sealing tooth cavity changes, and inhales, oil extraction.In the course of the work, the tooth cavity that half is arranged is oil suction, and second half tooth cavity is oil extraction, suction, the oil extraction of this two-part tooth cavity always hocket, all there are suction, oil extraction each moment like this, has guaranteed the continuity of suction, oil extraction, and each suction, oil drain quantity constantly is basic identical, flowed fluctuation is little, and pressure surge is little.To each tooth cavity, be oil sucting cavity be again pumping cavity, and constantly switch according to certain rule.Therefore, each tooth cavity all is provided with a turnover oil duct.Owing to adopted eccentric shaft structure, along with the volume of each sealing tooth cavity of rotation of eccentric shaft recurs variation, when the off-centre of eccentric shaft is pointed to certain enclosed cavity, the volume minimum of this enclosed cavity.Otherwise, when the off-centre of eccentric shaft dorsad during certain enclosed cavity, the volume maximum of this enclosed cavity.When the volume of enclosed cavity changes from small to big, inspiration oil, oil suction finished when the volume of enclosed cavity reached maximum, and the oil mass of inspiration is the maximum volume of enclosed cavity.And from large to small the time, discharge oil, and the volume of enclosed cavity reaches that hour oil extraction finishes, and still residual a part of oil can not be got rid of in the enclosed cavity, and residual oil mass is the minimum volume of enclosed cavity.So the maximum volume that the discharge capacity of each enclosed cavity equals it deducts minimum volume, i.e. the variable quantity of volume.Eccentric appearance makes the minimum volume of enclosed cavity further compress.Simultaneously, maximum volume further enlarges, and the volume-variation amount of enclosed cavity increases, and the flow of pump increases.
The beneficial effect of the invention is:
The present invention has overcome the thinking of two of related domain customs, and thing followed shortcoming, 1. has only in the past and adopts the mode of the volume that increases the pump housing, structure, specification could increase the flow of pump, and its shortcoming is conspicuous; 2. custom thinking in the past adopts the effect of eccentric shaft structure to deny to the present invention, think that mistakenly an eccentric side has later on increased suction, extruder output, corresponding extrusion, the intake of having increased of opposite side, general effect is cancelled out each other so, can augmented flow, therefore, the present invention has overcome usual thinking and behave, proposed clearly that " maximum volume that the discharge capacity of each enclosed cavity equals it deducts minimum volume, i.e. the variable quantity of volume." in this field, initiated in the eccentric shaft mode, the transformation with minor structure has obtained great good result outside the expectation dexterously.Therefore, in related domain be a technological innovation with outstanding feature and remarkable progress.
The present invention on original basis, is keeping having increased new characteristics again under original advantage after having adopted eccentric shaft structure, blanket as follows:
The inner and outer rotors axis has certain throw of eccentric, and the big more flow of throw of eccentric is big more, can obtain bigger flow;
Adopt the roller barrel structure, simplified pump structure, make installation and processing easier, reduced cost;
Each work tooth cavity be oil sucting cavity be again pumping cavity, when one work tooth cavity be oil sucting cavity, another work tooth cavity is an oil-discharging cavity, suction oil carries out simultaneously.Rotation of inner rotor, each tooth cavity of working is progressive continuously by the process that oil suction (or oil extraction) changes oil extraction (or oil suction) over to, and whenever there is a work tooth cavity to change oil extraction (or oil suction) over to by oil suction (or oil extraction), meanwhile, just have another work tooth cavity and change oil suction (or oil extraction) over to by oil extraction (or oil suction), whole process all hockets continuously.Therefore flowed fluctuation is little;
Each work tooth cavity be oil sucting cavity be again pumping cavity, after oil is inhaled into, be extruded away more on the spot, no handling process has reduced loss in efficiency;
Because flowed fluctuation is little, help reducing oil liquid pressure and impact, reduce noise;
Less demanding to hydraulic oil.
Description of drawings
Fig. 1 is a kind of mode of execution of eccentric double-cycloid rotor pump of the present invention, main pseudosection;
Fig. 2 Fig. 1 is positioned at the left pseudosection of eccentric shaft position;
Fig. 3 is a kind of mode of execution of this double-cycloid rotor pump of prior art, main pseudosection;
Fig. 4 Fig. 3 is positioned at the left pseudosection of transmission shaft position.
Among the figure, the 1st, transmission shaft, the 2nd, bearing, the 3rd, eccentric shaft, the 4th, backing plate, the 5th, internal rotor, the 6th, pin, the 7th, sleeve, the 8th, external rotor, the 9th, housing, the 10th, protecgulum, the 11st, bonnet, A be into/oil outlet, B goes out/filler opening, C is an oil duct.
Embodiment
Further describe structure of the present invention below in conjunction with accompanying drawing.
Structure: the present invention mainly is made up of transmission shaft 1, bearing 2, eccentric shaft 3, backing plate 4, internal rotor 5, pin 6, sleeve 7, external rotor 8, housing 9, protecgulum 10, bonnet 11 and flow-distributing valve 12 etc.Transmission shaft 1 connects firmly with eccentric shaft 3.Internal rotor 5, sleeve 7 and external rotor 8 constitute several tooth cavities that independently seal, and these tooth cavities are communicated with respectively with into and out of hydraulic fluid port A and B by oil duct C and flow-distributing valve 12.Internal rotor 5 is the curtate epicycloid gear, and external rotor 8 is the curtate hypocycloid gear ring, internal rotor 5 and eccentric shaft 3 deads in line, and external rotor 8 and transmission shaft 1 dead in line, eccentric shaft 3 has certain throw of eccentric with transmission shaft 1.Pin 6 passes sleeve 7 and is fixed on the front and rear covers, and its diameter is less than sleeve 7 diameter of bores, and with tangent contact of sleeve 7 endoporus.
Working principle: internal rotor 5, sleeve 7, external rotor 8 are meshing with each other, and form a plurality of tooth cavities that independently seal.Transmission shaft 1 drives internal rotor 5 by eccentric shaft 3 and does planetary motion, both in the time of transmission shaft 1 revolution, again around eccentric shaft 3 rotations.Internal rotor 5 drive spool 7 are around pin 6 rotation motions, and sleeve 7 drives external rotor 8 again and rotates.Along with the rotation of internal rotor 5, sleeve 7 and external rotor 8, the volume of sealing tooth cavity changes, and inhales, oil extraction.In the course of the work, the tooth cavity that half is arranged is oil suction, and second half tooth cavity is oil extraction, suction, the oil extraction of this two-part tooth cavity always hocket, all there are suction, oil extraction each moment like this, has guaranteed the continuity of suction, oil extraction, and each suction, oil drain quantity constantly is basic identical, flowed fluctuation is little, and pressure surge is little.To each tooth cavity, be oil sucting cavity be again pumping cavity, and constantly switch according to certain rule, therefore, each tooth cavity all is provided with an oily oil duct C of turnover.
Claims (5)
1. an eccentric double-cycloid rotor pump comprises protecgulum (10), housing (9), bonnet (11) and is positioned at the center of circle, stretches into the transmission shaft (1) of housing (9);
On described protecgulum (10) or bonnet (11), distributing on the circumference of concentric is provided with the pin (6) of respective numbers; Be nested with the sleeve (7) of internal diameter on each pin (6) greater than pin (6) external diameter; The peripheral socket of forming circumference at sleeve (7) is external rotor (8) circular, the curtate hypocycloid gear;
It is characterized in that: be connected the eccentric shaft (3) that the axle center is offset mutually with transmission shaft (1), go up at eccentric shaft (3) and rotate the internal rotor (5) that is nested with the curtate epicycloid gear.
2. according to the described a kind of eccentric double-cycloid rotor pump of claim 1, the offset distance that it is characterized in that described eccentric shaft (3) satisfies, external rotor (8) inner ring and internal rotor (5) outer ring contact tangent at the opposite direction that is positioned at eccentric shaft (3) skew with sleeve (7) cylindrical.
3. according to the described eccentric double-cycloid rotor pump of claim 1, it is characterized in that described internal rotor (5) the gear number of teeth adds the 2 gear numbers of teeth that equal described external rotor (8).
4. according to the described eccentric double-cycloid rotor pump of claim 1, it is characterized in that the gear number of teeth sum of the quantity of described pin (6) smaller or equal to 1/2nd internal rotors (5) the gear number of teeth and external rotor (8).
5. according to the described eccentric double-cycloid rotor pump of claim 1, it is characterized in that the difference of described sleeve (7) internal diameter and pin (6) external diameter equals the throw of eccentric of 1/2nd internal rotors (5) and external rotor (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010241947 CN101900110A (en) | 2010-07-30 | 2010-07-30 | Eccentric double-cycloid rotor pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010241947 CN101900110A (en) | 2010-07-30 | 2010-07-30 | Eccentric double-cycloid rotor pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101900110A true CN101900110A (en) | 2010-12-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010241947 Pending CN101900110A (en) | 2010-07-30 | 2010-07-30 | Eccentric double-cycloid rotor pump |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106401864B (en) * | 2016-09-18 | 2018-07-10 | 李海荣 | A kind of shell turns cycloid hydraulic motor |
| CN109555962A (en) * | 2019-01-17 | 2019-04-02 | 湖南机油泵股份有限公司 | A kind of rotor-type oil pump of remodeling |
| CN111577595A (en) * | 2016-11-07 | 2020-08-25 | 尼得科Gpm有限公司 | Electric cycloid rotor pump and manufacturing method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1616825A (en) * | 2003-11-11 | 2005-05-18 | 上海师范大学 | Cycloidal pin gear hydraulic pump |
| CN101158348A (en) * | 2007-11-13 | 2008-04-09 | 上海师范大学 | Rotor pump with double pendulum lines |
| CN201228632Y (en) * | 2008-06-24 | 2009-04-29 | 上海师范大学 | Inside engaged cycloidal rotor pump |
| CN101560973A (en) * | 2009-05-05 | 2009-10-21 | 上海师范大学 | Double-cycloid rotor variable pump |
| CN101639033A (en) * | 2008-07-31 | 2010-02-03 | 廖振宜 | Cycloidal hydraulic motor with engaged rotation of external rotor and internal gear |
-
2010
- 2010-07-30 CN CN 201010241947 patent/CN101900110A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1616825A (en) * | 2003-11-11 | 2005-05-18 | 上海师范大学 | Cycloidal pin gear hydraulic pump |
| CN101158348A (en) * | 2007-11-13 | 2008-04-09 | 上海师范大学 | Rotor pump with double pendulum lines |
| CN201228632Y (en) * | 2008-06-24 | 2009-04-29 | 上海师范大学 | Inside engaged cycloidal rotor pump |
| CN101639033A (en) * | 2008-07-31 | 2010-02-03 | 廖振宜 | Cycloidal hydraulic motor with engaged rotation of external rotor and internal gear |
| CN101560973A (en) * | 2009-05-05 | 2009-10-21 | 上海师范大学 | Double-cycloid rotor variable pump |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106401864B (en) * | 2016-09-18 | 2018-07-10 | 李海荣 | A kind of shell turns cycloid hydraulic motor |
| CN111577595A (en) * | 2016-11-07 | 2020-08-25 | 尼得科Gpm有限公司 | Electric cycloid rotor pump and manufacturing method thereof |
| CN111577595B (en) * | 2016-11-07 | 2022-04-29 | 尼得科Gpm有限公司 | Electric cycloid rotor pump and manufacturing method thereof |
| CN109555962A (en) * | 2019-01-17 | 2019-04-02 | 湖南机油泵股份有限公司 | A kind of rotor-type oil pump of remodeling |
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Application publication date: 20101201 |