CN100572813C - Pin-hole type cycloid rotor pump - Google Patents

Pin-hole type cycloid rotor pump Download PDF

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Publication number
CN100572813C
CN100572813C CNB2007100469993A CN200710046999A CN100572813C CN 100572813 C CN100572813 C CN 100572813C CN B2007100469993 A CNB2007100469993 A CN B2007100469993A CN 200710046999 A CN200710046999 A CN 200710046999A CN 100572813 C CN100572813 C CN 100572813C
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CN
China
Prior art keywords
pump
pin
sleeve
pinwheel
rotor
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 - Fee Related
Application number
CNB2007100469993A
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Chinese (zh)
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CN101139988A (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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Priority to CNB2007100469993A priority Critical patent/CN100572813C/en
Publication of CN101139988A publication Critical patent/CN101139988A/en
Application granted granted Critical
Publication of CN100572813C publication Critical patent/CN100572813C/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The present invention is a kind of rotor pump structure.Pin-hole type cycloid rotor pump comprises the pump housing and is positioned at two pump covers of side before and after the pump housing, and be positioned at pump housing central authorities, penetrate before and after the rotatingshaft of pump cover, fixedly connected internal rotor on described rotatingshaft, socket pinwheel on internal rotor; Internal rotor is the curtate epicycloid gear; The central authorities of translational disk are cavity, and inlaying at least around cavity, the three-piece tube constitutes pinwheel; Fixedly connected quantity equates with described sleeve number on pump cover, and distributing position and sleeve are embedded in the corresponding identical pin in position on the translational disk, and pin inserts in the corresponding sleeve, and the pin external diameter is less than sleeve diameter; By forming some tooth cavities and offer oil inlet and outlet between the cavity inner wall of the curtate epicycloid of described internal rotor wheel and pinwheel central authorities and the sleeve.Invention provides a kind of and can reduce flowed fluctuation, and pressure surge improves oil pressure, improves the stationarity of oil hydraulic pump, improves the rotor pump structure of oil hydraulic pump combination property.

Description

Pin-hole type cycloid rotor pump
Technical field
The present invention is a kind of hydraulic transmission, particularly relates to a kind of rotor pump structure that pressured fluid is provided.
Background technique
Known, as the hydraulic-pressure pump of prior art gear pump, vane pump, plunger pump, cycloid rotor type pump are arranged, 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 pump cover 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.
Summary of the invention
The objective of the invention is, improve the combination property of oil hydraulic pump.Provide a kind of and can reduce flowed fluctuation, pressure surge improves oil pressure, improves the stationarity of oil hydraulic pump; Reduce the volume of oil hydraulic pump; Reduce the fretting wear of each surface of contact of external rotor, make the cycloid rotor pump of the easier assurance of inside and outside eccentricity of rotor precision.
The objective of the invention is to be achieved through the following technical solutions:
Pin-hole type cycloid rotor pump comprises the pump housing and is positioned at two pump covers of side before and after the pump housing, and be positioned at pump housing central authorities, penetrate before and after the rotatingshaft of pump cover, it is characterized in that,
Fixedly connected internal rotor on described rotatingshaft, socket pinwheel on internal rotor;
Described internal rotor is the curtate epicycloid gear;
Described pinwheel is that the central authorities of translational disk are cavity, inlay three-piece tube at least around cavity;
Fixedly connected quantity equates with described sleeve number on described pump cover, and distributing position and sleeve are embedded in the corresponding identical pin in position on the translational disk, and pin inserts in the corresponding sleeve, and the pin external diameter is less than sleeve diameter;
The inner chamber of the described pump housing contains the pinwheel outer ring, and leaves displacement distance;
By forming some tooth cavities between the cavity inner wall of the curtate epicycloid of described internal rotor wheel and pinwheel central authorities and the sleeve, described tooth cavity is offered oil inlet and outlet in the corresponding position of pump cover.
Further be that the displacement distance between described pump housing inner chamber and pinwheel outer ring is more than or equal to the difference of described pin external diameter and sleeve diameter.
Further be that described pin external diameter equals the 0.2-0.9 sleeve diameter.
Further be that described sleeve and translational disk are one.
The present invention mainly is made up of transmission shaft, internal rotor, pin, front pump cover, sleeve, translational disk, the pump housing, rear pump cover.Sleeve is embedded in translational disk and constitutes pinwheel, and internal rotor, sleeve and translational disk constitute several tooth cavities that independently seals, and wherein tooth cavity is the work tooth cavity, is communicated with respectively with into and out of hydraulic fluid port A, B.Internal rotor is the curtate epicycloid gear, the eccentric setting of pinwheel that internal rotor is made of sleeve and translational disk relatively.Sleeve equates with the pin quantity of inserting sleeve, distributing position is identical, the pin external diameter is less than sleeve diameter, when rotating in the interior concave cavity of internal rotor at pinwheel, guarantee that pin is in the continuous tangent rotation of sleeve endoporus, the throw of eccentric of pinwheel and internal rotor equals the throw of eccentric of pin and sleeve, promptly equals the radius difference of pin and sleeve endoporus.
Working principle: between internal rotor and the pinwheel center that constitutes by sleeve and translational disk a throw of eccentric is arranged,, form a plurality of tooth cavities that independently seal between internal rotor and the pinwheel by means of the engagement of the sleeve on internal rotor and the translational disk.When internal rotor rotates, under the restriction of pin, drive pinwheel and do round translational motion, along with flatting turn of rotation of inner rotor and pinwheel is moving, the volume of work tooth cavity changes, and inhales, oil extraction.In the course of the work, oil suction when the tooth cavity of partly working changes from small to big, and corresponding other work tooth cavity carries out oil extraction from large to small, suction, the oil extraction of these two work tooth cavities 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, by oil inlet and outlet, turnover oil pipe in succession is communicated to oil distributing valve and controls the oil-feed of each tooth cavity and fuel-displaced.
The beneficial effect and the advantage of the technical program are:
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.
Pinwheel need not bearings, has saved bearing;
During work, pinwheel is made the circle translational motion, and track is for being the circle of radius with the throw of eccentric.The friction of translation pinwheel and front and back pump cover surface of contact like this, wearing and tearing little.Pin is that tangent plane contacts with the sleeve of pinwheel, and contact stress is little, help lubricating, so the friction between the sleeve of pin and pinwheel, wearing and tearing also little, thereby help improving mechanical efficiency, increase the service life;
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;
Pin tooth on the pinwheel adopts tube-in-tube structure, is assemblied on the translational disk, has simplified the process for machining and manufacturing of pinwheel;
Less demanding to hydraulic oil.
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 pin-hole type 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 pin-hole type cycloid rotor pump of the present invention;
Fig. 5 for another embodiment of pin-hole type 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, transmission shaft 1, internal rotor 2, pin 3, front pump cover 4, sleeve 5, translational disk 6, the pump housing 7, rear pump cover 8, tooth cavity 9,10,11,12 are into and out of hydraulic fluid port A, B.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present invention are elaborated.
Embodiment 1:
A kind of pin-hole type cycloid rotor pump, its structure is shown in Fig. 3,4.This pump is mainly by transmission shaft 1, internal rotor 2, four pieces of pins 3, protecgulum 4, six sleeves 5, translational disk 6, the pump housing 7, bonnet 8, and forms into and out of component such as hydraulic fluid port A, B.Transmission shaft 1 and internal rotor 2 fixed connections.Internal rotor 2 is the curtate epicycloid wheel; Sleeve 5 is fixed on the translational disk 6, perhaps is made of one, and constitutes pinwheel.Sleeve 5 is distributed on the same circumference, and pin 3 is fixed on the front pump cover, also is distributed on the same circumference, and the distribution center of circle is concentric with internal rotor.These two distribution circle equal diameters, arranged off-centre.The endoporus continuous phase cut-grafting of the sleeve 5 on pin 3 and the pinwheel is touched, and pinwheel is with respect to the eccentric setting of internal rotor, and throw of eccentric equals the radius difference of pin 3 and sleeve 5 endoporus.Internal rotor 2, pinwheel are formed four and are independently sealed tooth cavity 9,10,11,12, the tooth cavity of these sealings be oil sucting cavity be again pumping cavity.Select for use whole tooth cavities as the work tooth cavity.
During work, transmission shaft 1 rotates, and drives internal rotor 2 and rotates.Pin gear sleeve tube 5 engagements on internal rotor 2 and the pinwheel drive the pinwheel motion, owing to be subjected to the restriction of pin 3, pinwheel is done round translational motion.Along with internal rotor 2 rotates and the translation of pinwheel, each volume that seals tooth cavity changes, and inhales, oil extraction.To each tooth cavity, be oil sucting cavity be again pumping cavity, and constantly switch according to certain rule.Simultaneously, there is a corresponding oil distributing valve to control the oil-feed of each tooth cavity and fuel-displaced.
Embodiment 2:
A kind of pin tooth cycloid oil hydraulic pump, its structure as shown in Figure 5.This oil hydraulic pump is mainly by transmission shaft 1, internal rotor 2, six pieces of pins 3, protecgulum 4, six sleeves 5, translational disk 6, the pump housing 7, bonnet 8, and six are formed into and out of component such as hydraulic fluid port A, B.Transmission shaft 1 connects firmly with internal rotor 2; Internal rotor 2 is the curtate epicycloid wheel; Sleeve 5 is fixed on the translational disk 6, perhaps is made of one, and constitutes pinwheel.Six sleeves 5 are distributed on the same circumference, and six pieces of pins 3 are fixed on the rear pump cover, also are distributed on the same circumference, and the distribution center of circle is concentric with transmission shaft.These two distribution circle equal diameters, arranged off-centre.The endoporus continuous phase cut-grafting of the sleeve 5 on pin 3 and the pinwheel is touched, and pinwheel is with respect to the eccentric setting of internal rotor, and throw of eccentric equals the radius difference of pin 3 and sleeve 5 endoporus.Internal rotor 2, pinwheel are formed six and are independently sealed tooth cavity A, the tooth cavity of these sealings be oil sucting cavity be again pumping cavity, select for use whole tooth cavities as the work tooth cavity, as shown in Figure 3.
During work, transmission shaft 1 rotates, and drives internal rotor 2 and rotates.Pin gear sleeve tube 5 engagements on internal rotor 2 and the pinwheel drive the pinwheel motion, are subjected to the restriction of pin 3, and pinwheel is done round translational motion.Along with internal rotor 2 rotates and the translation of pinwheel, each volume that seals tooth cavity changes, and inhales, oil extraction.To each tooth cavity, be oil sucting cavity be again pumping cavity, and constantly switch according to certain rule.

Claims (4)

1. pin-hole type cycloid rotor pump comprises the pump housing and is positioned at two pump covers of side before and after the pump housing, and be positioned at pump housing central authorities, penetrate before and after the rotatingshaft of pump cover, it is characterized in that,
Fixedly connected internal rotor on described rotatingshaft, socket pinwheel on internal rotor;
Described internal rotor is the curtate epicycloid gear;
Described pinwheel is that the central authorities of translational disk are cavity, inlay three-piece tube at least around cavity;
Fixedly connected quantity equates with described sleeve number on described pump cover, and distributing position and sleeve are embedded in the corresponding identical pin in position on the translational disk, and pin inserts in the corresponding sleeve, and the pin external diameter is less than sleeve diameter;
The inner chamber of the described pump housing contains the pinwheel outer ring, and leaves displacement distance;
By forming some tooth cavities between the cavity inner wall of the curtate epicycloid of described internal rotor wheel and pinwheel central authorities and the sleeve, described tooth cavity is offered oil inlet and outlet in the corresponding position of pump cover.
2. pin-hole type cycloid rotor pump according to claim 1 is characterized in that displacement distance between described pump housing inner chamber and pinwheel outer ring is more than or equal to the difference of described pin external diameter and sleeve diameter.
3. pin-hole type cycloid rotor pump according to claim 1 is characterized in that described pin external diameter equals the 0.2-0.9 sleeve diameter.
4, pin-hole type cycloid rotor pump according to claim 1 is characterized in that described sleeve and translational disk are one.
CNB2007100469993A 2007-10-12 2007-10-12 Pin-hole type cycloid rotor pump Expired - Fee Related CN100572813C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNB2007100469993A CN100572813C (en) 2007-10-12 2007-10-12 Pin-hole type cycloid rotor pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNB2007100469993A CN100572813C (en) 2007-10-12 2007-10-12 Pin-hole type cycloid rotor pump

Publications (2)

Publication Number Publication Date
CN101139988A CN101139988A (en) 2008-03-12
CN100572813C true CN100572813C (en) 2009-12-23

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Family Applications (1)

Application Number Title Priority Date Filing Date
CNB2007100469993A Expired - Fee Related CN100572813C (en) 2007-10-12 2007-10-12 Pin-hole type cycloid rotor pump

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102400911B (en) * 2011-12-08 2014-04-16 贵州凯星液力传动机械有限公司 Novel single-flow-direction clockwise and anticlockwise rotation cycloidal rotor pump
CN108561740B (en) * 2018-07-10 2020-04-10 浙江平柴泵业有限公司 Oil pump

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Granted publication date: 20091223

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