CN101158348A - Rotor pump with double pendulum lines - Google Patents

Rotor pump with double pendulum lines Download PDF

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Publication number
CN101158348A
CN101158348A CNA2007100481567A CN200710048156A CN101158348A CN 101158348 A CN101158348 A CN 101158348A CN A2007100481567 A CNA2007100481567 A CN A2007100481567A CN 200710048156 A CN200710048156 A CN 200710048156A CN 101158348 A CN101158348 A CN 101158348A
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CN
China
Prior art keywords
rotor
sleeve
internal
external
gear
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Granted
Application number
CNA2007100481567A
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Chinese (zh)
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CN100520067C (en
Inventor
林菁
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Shanghai Normal University
University of Shanghai for Science and Technology
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Shanghai Normal University
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Publication of CN101158348A publication Critical patent/CN101158348A/en
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Publication of CN100520067C publication Critical patent/CN100520067C/en
Expired - Fee Related legal-status Critical Current
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Abstract

The invention provides a hydraulic pump with a cycloid rotor-typed structure. The dual-cycloid rotor pump comprises a front cover (6), a shell (8), a rear cover (9) and a transmission shaft (1) arranged in the axis center and extended into the shell (8). The invention is characterized in that the transmission shaft (1) is coaxially and fixedly connected with an internal rotor (2) of a short-amplitude epicycloid gear; the front cover (6) or the rear cover (9) and the circumference concentric with the internal rotor are provided with pintles (4) with corresponding quantity; all pintles (4) are sleeved with sleeves (3) with the internal diameter larger than the external diameter of the pintle (4); the periphery of the circumference assembled by the sleeves (3) is sleeved with an external rotor (5) in cirque-shape; the external rotor (5) is the short-amplitude cycloid gear ring; the axis line of the external rotor (5) is coincident with the axis lien of the internal rotor (2); a bearing (7) is arranged between the shell (8) and the external rotor (5). The invention has the advantages of compact and simple structure, small volume, easy process and installation, low cost, small flux fluctuation, small efficiency loss, being quiet and low requirement to the hydraulic oil.

Description

Double-cycloid rotor pump
(1) technical field
The present invention is a hydraulic transmission, particularly relates to a kind of oil hydraulic pump of cycloid rotor type structure.
(2) background technique
At present, hydraulic-pressure pump commonly used 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, along with nearly 180 degree of 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.
Figure 1 shows that the cycloid rotor pump structure, it is mainly by rotatingshaft, inside and outside rotor, and the forward and backward end cap and the pump housing are formed, and the internal rotor profile of tooth is a curtate epicycloid, and the external rotor profile of tooth is a circular arc.Its working principle is the inside and outside rotor by means of a pair of eccentric engagement, in engagement process, forms the several separate enclosed space.Along with the engagement rotation of inside and outside rotor, the volume of each enclosed space changes, and carries out suction oil.Because the inside and outside rotor number of teeth is few, the working pressure fluctuation is used for the occasion of mesolow greatly more under the high pressure low-speed conditions.Rotor required precision height, external rotor are the gear ring of circle-arc tooth, the manufacturing difficulty.Inside and outside eccentricity of rotor precision be difficult for to guarantee that if throw of eccentric is incorrect, the engagement with the inside and outside rotor of influence lowers efficiency, and produces noise, and is serious even make rotor damage etc.
(3) summary of the invention
The objective of the invention is, obtain small, steady flow, simplified structure is simplified installation, process for machining and manufacturing, reduces cost.
The purpose of invention is achieved through the following technical solutions:
Double-cycloid rotor pump comprises protecgulum 6, housing 8, bonnet 9 and is positioned at a center, stretches into the transmission shaft 1 of housing 8, it is characterized in that:
Internal rotor 2 coaxial the fixedlying connected of described transmission shaft 1 and curtate epicycloid gear;
On described protecgulum 6 or bonnet 9, the pin 4 of respective numbers is set with distributing on the circumference of internal rotor 2 concentrics;
Be nested with the sleeve 3 of internal diameter on each pin 4 greater than pin 4 external diameters;
The peripheral socket of forming circumference at sleeve 3 is circular external rotor 5, and external rotor 5 is the curtate hypocycloid gear ring;
Between described housing 8 and external rotor 5, bearing 7 is set.
Further be, the dead in line of external rotor 5 and internal rotor 2, the sleeve 3 between two gears contacts with two gear engagement in rotation.
Further be that the internal rotor 2 gear numbers of teeth add the 2 gear numbers of teeth that equal external rotor 5.
Further be that the quantity of pin 4 is smaller or equal to the gear number of teeth sum of 1/2nd internal rotors, the 2 gear numbers of teeth and external rotor 5.
Further be that described pin 4 external diameters equal 0.2-0.9 sleeve 3 internal diameters.
Further be, described sleeve 3 is installed on the translational disk 10 that is ring, and the dead in line of each group sleeve 3 and pin 4.
Internal rotor 2, sleeve 3 and external rotor 5 constitute several tooth cavities that independently seal, and these tooth cavities are communicated with respectively with into and out of hydraulic fluid port A.
Internal rotor 2 is the curtate epicycloid gear, and external rotor 5 is the curtate hypocycloid gear ring, the dead in line of inner and outer rotors.Pin 4 passes sleeve and is fixed on protecgulum or the bonnet, and its diameter is less than the sleeve diameter of bore, and with tangent contact of sleeve 5 endoporus.
Internal rotor 2, sleeve 3, external rotor 5 are meshing with each other, and form a plurality of tooth cavities that independently seal.Transmission shaft drives internal rotor 2 and rotates, and internal rotor 2 drive spool 3 are around pin 4 rotation motions, and sleeve 3 drives external rotor 5 again and rotates.Along with the rotation of internal rotor 2, sleeve 3 and external rotor 5, 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 oil inlet and outlet A.
The quantity of pin 4 can guarantee that smaller or equal to the gear number of teeth sum of 1/2nd internal rotor gear numbers of teeth and external rotor 5 tooth of sleeve and inside and outside cycloidal gear forms the tooth cavity of sealing.The quantity of some occasion pin 4 is during less than the gear number of teeth sum of 1/2nd internal rotor gear numbers of teeth and external rotor 5, be commonly called as " taking out tooth ", also can be formed on high pressure, the oil-discharging cavity of the both sides of line of centers, carry out proper functioning, so favourable simplification manufacturing processing of structure.Can obtain hunting range preferably when the pin external diameter equals the 0.2-0.9 sleeve diameter, obtain motor power preferably.Sleeve 3 is fixedly mounted on the translational disk 10, can make the rotation of sleeve 3 more unobstructed steadily, has improved the working efficiency of rotor pump.
The beneficial effect and the advantage that the invention provides technological scheme are:
1. inner and outer rotors dead in line can obtain tiny flow quantity, and flow is accurate, and makes compact structure simple, and volume is little, and installation and processing is easy, and cost is low.
2. 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;
3. 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;
4. because flowed fluctuation is little, helps reducing oil liquid pressure and impact, reduce noise;
5. less demanding to hydraulic oil.
(4) description of drawings
Fig. 1 is the prior art cycloid rotor pump, along the pump housing and pump cover junction plane sectional plan view;
Fig. 2 is the side view cutaway drawing of Fig. 1;
Fig. 3 is that double-cycloid rotor pump of the present invention is along the pump housing and pump cover junction plane sectional plan view;
Fig. 4 is the side view cutaway drawing of double-cycloid rotor pump of the present invention;
Fig. 5 for another embodiment of double-cycloid rotor pump of the present invention along the pump housing and pump cover junction plane sectional plan view;
Fig. 6 is the side view cutaway drawing of Fig. 5.
Among the figure, 1-transmission shaft, 2-internal rotor, 3-sleeve, 4-pin, 5-external rotor, 6-front cover, 7-bearing, 8-housing, 9-rear end cover, 10-translational disk, A-are into and out of hydraulic fluid port
(5) embodiment
Below in conjunction with drawings and Examples, the present invention is elaborated.
Embodiment 1:
A kind of double-cycloid rotor pump, its structure is shown in Fig. 3,4.This pump mainly is made up of transmission shaft 1, internal rotor 2, sleeve 3, pin 4, external rotor 5, protecgulum 6, bearing 7, bearing 8, housing bonnet 9.Transmission shaft 1 and internal rotor 2 coaxial fixedlying connected.Internal rotor 2, sleeve 3 and external rotor 5 constitute several tooth cavities that independently seal, and these tooth cavities are communicated with respectively with into and out of hydraulic fluid port A.Internal rotor 2 is the curtate epicycloid gear, and external rotor 5 is the curtate hypocycloid gear ring, the dead in line of inner and outer rotors.Pin 4 passes sleeve and is fixed on the front and rear covers, and its diameter is less than the sleeve diameter of bore, and with tangent contact of sleeve 5 endoporus.
During work, internal rotor 2, sleeve 3, external rotor 5 are meshing with each other, and form a plurality of tooth cavities that independently seal.Transmission shaft drives internal rotor 2 and rotates, and internal rotor 2 drive spool 3 are around pin 4 rotation motions, and sleeve 3 drives external rotor 5 again and rotates.Along with the rotation of internal rotor 2, sleeve 3 and external rotor 5, 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 one into and out of hydraulic fluid port A.
Embodiment 2:
A kind of double-cycloid rotor pump, its structure is shown in Fig. 5,6.This oil hydraulic pump is substantially the same manner as Example 1, mainly is made up of transmission shaft 1, internal rotor 2, sleeve 3, pin 4, external rotor 5, protecgulum 6, bearing 7, bearing 8, housing bonnet 9 and translational disk 10.Transmission shaft 1 and internal rotor 2 coaxial fixedlying connected.It is characterized in that all sleeves 3 are fixedly mounted on one and are on the circular translational disk 10, constitute the pinwheel structure.
During work, internal rotor 2, sleeve 3, external rotor 5 are meshing with each other, and form a plurality of tooth cavities that independently seal.Transmission shaft drives internal rotor 2 and rotates, and internal rotor 2 drive spool 3 are made the circle translational motion around pin 4, and sleeve 3 drives external rotor 5 again and rotates.Along with the rotation of internal rotor 2 and external rotor 5, the translation of sleeve 3, 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.
Present embodiment is because all sleeves 3 are fixedly mounted on the translational disk 10, and therefore, the rotation of testing sleeve 3 after tested is more unobstructed steadily, has improved the working efficiency of rotor pump.

Claims (6)

1. double-cycloid rotor pump comprises protecgulum (6), housing (8), bonnet (9) and is positioned at a center, stretches into the transmission shaft (1) of housing (8), it is characterized in that:
Coaxial the fixedlying connected of internal rotor (2) of described transmission shaft (1) and curtate epicycloid gear;
On described protecgulum (6) or bonnet (9), the pin (4) of respective numbers is set with distributing on the circumference of internal rotor (2) concentric;
Be nested with the sleeve (3) of internal diameter on each pin (4) greater than pin (4) external diameter;
The peripheral socket of forming circumference at sleeve (3) is circular external rotor (5), and external rotor (5) is the curtate hypocycloid gear ring;
Between described housing (8) and external rotor (5), bearing (7) is set.
2. double-cycloid rotor pump according to claim 1 is characterized in that the dead in line of described external rotor (5) inner ring and internal rotor (2) outer ring, and the sleeve between two gears (3) contacts with two gear engagement in rotation.
3. double-cycloid rotor pump according to claim 1 is characterized in that described internal rotor (2) the gear number of teeth adds the 2 gear numbers of teeth that equal described external rotor (5).
4. double-cycloid rotor pump according to claim 1 is characterized in that the gear number of teeth sum of the quantity of described pin (4) smaller or equal to 1/2nd internal rotors (2) the gear number of teeth and external rotor (5).
5. double-cycloid rotor pump according to claim 1 is characterized in that described pin (4) external diameter equals 0.2-0.9 sleeve (3) internal diameter.
6. double-cycloid rotor pump according to claim 1 is characterized in that described sleeve (3) is installed on the translational disk (10) that is ring, and the dead in line of each group sleeve (3) and pin (4).
CNB2007100481567A 2007-11-13 2007-11-13 Rotor pump with double pendulum lines Expired - Fee Related CN100520067C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNB2007100481567A CN100520067C (en) 2007-11-13 2007-11-13 Rotor pump with double pendulum lines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNB2007100481567A CN100520067C (en) 2007-11-13 2007-11-13 Rotor pump with double pendulum lines

Publications (2)

Publication Number Publication Date
CN101158348A true CN101158348A (en) 2008-04-09
CN100520067C CN100520067C (en) 2009-07-29

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101900110A (en) * 2010-07-30 2010-12-01 上海师范大学 Eccentric double-cycloid rotor pump
CN101560973B (en) * 2009-05-05 2010-12-01 上海师范大学 Double-cycloid rotor variable pump

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102865223B (en) * 2012-09-14 2014-12-31 左文明 Double-stage inner gearing rolling sleeve pump

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101560973B (en) * 2009-05-05 2010-12-01 上海师范大学 Double-cycloid rotor variable pump
CN101900110A (en) * 2010-07-30 2010-12-01 上海师范大学 Eccentric double-cycloid rotor pump

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Granted publication date: 20090729

Termination date: 20121113