CN2856494Y - Gear of polymer delivery gear pump - Google Patents
Gear of polymer delivery gear pump Download PDFInfo
- Publication number
- CN2856494Y CN2856494Y CN 200520047536 CN200520047536U CN2856494Y CN 2856494 Y CN2856494 Y CN 2856494Y CN 200520047536 CN200520047536 CN 200520047536 CN 200520047536 U CN200520047536 U CN 200520047536U CN 2856494 Y CN2856494 Y CN 2856494Y
- Authority
- CN
- China
- Prior art keywords
- gear
- tooth
- curve
- flank
- gear pump
- 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
Links
Landscapes
- Rotary Pumps (AREA)
Abstract
The utility model discloses a gear of a polymer transmission gear pump. The gear includes a tooth profile and a tooth root, and the tooth profile consists of a circular arc on the top of the tooth, a curve EM of the tooth angle, a curve MS of the flank, a tooth flank which are connected smoothly with the transition curve SA of the tooth root and the circular arc curve of the tooth root in order; there are no singular points, no gear meshing interference and under cut phenomenon on the whole tooth profile curve; the number of the gear tooth is 12-20, and the frictional angle is smaller than that of the traditional gear while the touch area is larger than that of the traditional gear. A new gearing mesh moulding surface is obtained without the situation that the tooth top and the tooth root of the traditional gear not mesh with others. The problems of interference and insufficient contact ratio can be solved because the number of rotors used by a gear pump is small. The gear can be used in the over-loading transmission industry except satisfying the requirement of the polymer transmission gear pump.
Description
Technical field
The utility model relates to a kind of special gear, particularly relate to a kind of petrochemical industry produce in polymer transport with the gear pump special gear.
Background technique
Polymer transport is mainly used in the high temperature of carrying in the petrochemical industry flow process, the viscous state polymer of high pressure with gear pump, perhaps use with single screw rod, double screw extruder, the polymer melt that extrusion shaping machine can be extruded becomes high pressure by low pressure like this, eliminate output fluctuation, stably import material in the head, improve output, ensure the quality of products.The moulding in this way of plastics, rubber and fiber.The petrochemical industry of China has been introduced many polymer transport gear pumps with regard to supporting from the large quantities of complete major technologies and equipment of external introduction.These pumps are the heart equipment of complexes mostly, and the polymer that it is carried is promptly curable in a short period of time at normal temperatures and pressures, and pump tends to directly have influence on the safe operation of package unit if break down; Under high-temperature condition, the polymer melt overstand also is easy to generate thermal cracking in addition, thereby influences the quality of product, rests in the pump housing for a long time so can not allow polymer melt body.Because the high viscosity that polymer melts body is so also have the higher requirement of ratio to the bearing capacity of rotor.These are all closely related with the engagement profile of gear rotor.
The working principle of gear pump is by means of a pair of gear pair gear teeth disengage from side and the cyclically-varying that enters the swept volume that engagement side forms in seal casinghousing realizes the conveying of fluid.Meshing performance as the gear rotor of the core component of gear pump has determined the gear pump performance to a great extent, and therefore new gear pump rotor has important effect to improving the gear pump performance.And new gear rotor mainly concentrates on the new flank profil basis.
Scholar both domestic and external has carried out a large amount of research to gear pump and rotor engaged profile thereof
[1～3], and be applied in the inside and outside gear pump rotor, obtained good effect.Internal gear pump is mainly in the majority with few tooth-difference cycloid flank profil, and document [4] has solved the pocketed oil problem, better performances with poor, the interior engagement arc profile of three teeth.Meng Jian
[5], Hou Donghai
[6]Circular arc curtate epicycloid equidistant curve profile is applied on the internal gear pump rotor, has been widely used in oil, chemical industry and general industry.And for external gear pump, the engagement profile is mainly in the majority with involute flank, and its rotor mostly is spur gear or helical gear
[7,8], but other more special engagement profile is also had research, the P type special tooth profile high viscosity gear pump of Zhengzhou Research Institute of Mechanical Engineering's exploitation has adopted the pitch face of circular arc equal space line build-up curve and has revised involute flank, makes that the interior leakage of gear pump is little, flow is big.Document [9] has adopted the eccentric gear oil pump of involute profile, though increased the flow of pump, its flow pulsation, pressure pulsation and noise are all greater than conventional pump.The profile of tooth of gear pump rotor also comprises trochoid profile of tooth, logarithmic spiral profile of tooth in addition
[11～17]Deng.Extraordinary gear pump and polymer transport a large amount of research and developments have been carried out with gear pump and engagement profile abroad
[14～19], but owing to the secret reason of technology, more detailed technical paper is difficult to consult.The U.S., Switzerland, Germany, Japan and other countries have successively been developed series product separately, and extraordinary gear pump is more famous with the external gear pump of the big rolling of U.S. Viking crescent gear pump and Japan Co., Ltd..Polymer transport does not then occupy the leading level in the world with the product of synchromesh gear with the polymer devices company (POLYMER EQUIPMENT CO.) of the U.S. and Switzerland Ma Ge company (MAAG) with gear pump.Analysis from all kinds of gear pump Surface of action of China institute import, more than research all fails to overcome fully the formation of tooth top and tooth root enclosed space of rotor profile of being meshing with each other, and curing phenomenon or the thermal cracking of transferring polymer fluid in enclosed space formation is difficult to eliminate fully.
The main reference document
[1] He Cunxing. hydraulic element. Beijing: China Machine Press, 1981
[2] river, city is often male. the design of gear pump, Beijing: mechanical collected translation, 64.NO.3
[3] Tang Bing, Luan Zhenhui. the development trend of gear pump. fluid machinery, 1999,5:26～28
[4] Zhang Miaoling, Pan Zhengguang. the development of engagement cycloid gear pump in novel. fluid machinery, 1997 (10), 19～23
[5] Meng Jian etc. interior engagement cycloid gear pump flank profil characteristic parameter design is inquired into. chemical machinery, 1990 (3), 145～150
[6] Hou Donghai etc. few tooth-difference cycloid gear pump theory of engagement and geometric parameter are selected. mechanical transmission, 1995 (3), 24～27
[7] Zhao Liang. the Helical Gear Pump for Flow specificity analysis. mechanical engineering journal, 1999,35 (5): 94～97
[8]JAMS，M.MCKELVEY.Performance?og?Gear?Pumps?in?Polymer?Processing.PolymerEngineering?and?Science，April，1984，Vol?24，No.6,398～402
[9] Hu Ningshuan etc.A kind of development of new gear pump and performance improvement.XI AN JIAOTONG UNIVERSITY Subject Index, 1990 (6), 79～86
[10] Hu Kaiwen. the discussion of gear pump working principle. agricultural mechanical journal, 2000 (3): 67～70
[11] Dai Gance, Ren Decheng, Fan Zihui. the transport phenomenon introduction. Beijing: Chemical Industry Press, 1996
[12] Song Jun etc. writes. hydraulic system optimization. and Beijing: China Machine Press, 1996
[13] Min Deyun. the optimal design of gear pump. Machine Design and manufacturing, 1990,4:5～9
[14] Zhu Caichao, Tang Zhongyi. the application of solid modelling in the gear pump design. machinery, 1995,22 (4): 4～6
[15]Harris?S?L.Comparison?of?an?External?Gear?Pump?Wear?Model?with?TestData.Proceeding?of?the?institution?of?Mechanical?Engineers，1958?172：87～112
[16]Shaburov，Igor.Mathematical?model?and?analysis?program?for?ripplecharacteristics?of?an?external?gear?pump.Proceedings?of?the?3rd?International14111111111111 Symposium?on?Fluid?Power?Transmission?and?Control(ISFP’99).
[17]B.Obsieger，Some?Characteristics?of?Gear?with?Sinusoidal?Toothing，Magisterium，University?in?Ljubljana，Technical?Faculty，Ljubljana，1986.
[18]Chen?CK，Ynag?SC.Geometric?modeling?for?cylindrical?and?helical?gear?pumps?withcircular?are?teeth.P?I?MECH?ENG?C-J?MEC?214(4)：599～607?2000
Frith，R.H.；Scott，W.Comparison?of?an?external?gear?pump?wear?model?with?test?data.Queensland?Univ?of?Technology，Brisbane，Aust.，1996，No.8?64～71
Summary of the invention
Technical problem to be solved in the utility model provides a kind of polymer transport gear pump gear, to remedy the deficiencies in the prior art, meets the needs of production.
In order to solve the problems of the technologies described above, the technological scheme that the utility model adopted is a kind of polymer transport gear pump gear, comprise flank profil and tooth root, whole flank profil is by the transition curve SA and smooth being formed by connecting of tooth root circular curve order of tooth top circular arc, tooth angle curve EM, flank curve M S, flank and tooth root; Whole tooth curve does not have singular point, gearless meshing interference and Undercutting Phenomenon; The gear number of teeth is 12～20, and type tooth friction angle is less than conventional gears, and surface of contact is greater than conventional gears.
As optimized technical scheme: described flank curve M S is a sinusoidal curve, and contact strength and flexural strength will be higher than involute gear; Described transition curve is a prolate epicycloid, and tooth angle is a wedge angle; Described transition curve is a curtate epicycloid, and tooth angle is a fillet.
Design principle of the present utility model is: the volume type rotary fluid machinery is being gripped flank profil altogether and goed deep on the basis of theoretical research with extraordinary, the wide seal concept of full-depth tooth is proposed (when promptly referring to the rotor rotation, the tip curve of its gear teeth, the tooth root curve, flank curve and transition curve all participate in intermeshing process), set up its mathematical model by modern mesh theory and Computer-aided Geometric Design technology such as (CAGD), develop new special utility gear, the formation of between cog enclosed space in the time of also avoiding gear to contact with the sealing that increases substantially engagement pair with load-carrying properties is to satisfy the special requirement of polymer transport with gear pump.
The utility model polymer transport gear pump is a kind of new gear that is different from the transmission of common mechanical transmission middle gear with the gear of the wide intermeshing special shape of full-depth tooth.Its geometric properties constitutes: be different from general driving gear, the tooth top of the gear that is meshing with each other and the gap between the tooth root have been eliminated fully, avoided meshing interference and guaranteed the transmission contact ratio by the special flank of tooth, can not reach " from back chipping " purpose with the gear pump rotor owing to existing of bottom clearance to overcome existing polymer transport, and this gear number of teeth is few, and type tooth friction angle is little, and surface of contact is big, so wear resistance is good and transmission is worked good, thereby satisfy the needs of polymer production.
The beneficial effects of the utility model are: changed the tooth top of traditional gear engagement and tooth root and do not participated in situation about meshing, obtained new gear engagement profile, because the rotor that gear pump is used requires the number of teeth few, has overcome interference problem and the not enough problem of contact ratio that this respect brings.Polymer transport is with the requirement of gear pump in satisfying petrochemical industry; Because the raising of its bearing capacity also can be applicable in the industry of heavy load transmission.
Description of drawings
Fig. 1 flank profil schematic representation of the present utility model
Embodiment
Below in conjunction with specific embodiment the utility model is further elaborated.
Embodiment 1
With reference to accompanying drawing 1, whole flank profil is by the transition curve SA and smooth being formed by connecting of tooth root circular curve order of tooth top circular arc, tooth angle curve EM, flank curve M S, flank and tooth root; Whole tooth curve does not have singular point, gearless meshing interference and Undercutting Phenomenon; The gear number of teeth is 12, and type tooth friction angle participates in engagement because full-depth tooth is wide, and selects helical tooth flank for use, so surface of contact is big less than conventional gears.Described flank curve M S is a sinusoidal curve, and contact strength and flexural strength will be higher than involute gear; Transition curve is prolate epicycloid (tooth angle is a wedge angle).
A gear is for taking turns 1 in the note gear pump, and the identical gear of another that is engaged with is wheel 2, and the E point of wheel 1 at first enters engagement with A ' that takes turns 2, and along with the rotation of the gear teeth, the E point of wheel 1 slides into S ' point from A ' on the flank profil of wheel 2; Then, the particular curve flank profil part ES and the S ' E ' of two-wheeled enter engagement; When special engagement finished, the contact points of wheel 1 was the S point, and the contact points of wheel 2 is E ' point, and along with the further rotation of two-wheeled, E ' of wheel 2 slides into the A point from the S point on wheel 1, and the contact points of this hour wheel 1 is the A point, and the contact points of wheel 2 is E ' point; Two-wheeled is rotated further, and the tooth root circular arc of wheel 1 contacts with the tooth top circular arc of wheel 2, the inlet point engagement driving, and so far, whole tooth curves of wheel 1 all carry out engagement driving with the flank profil of wheel 2.
For gear pump, gear rotor is the wide engages and seals profile of full-depth tooth, can eliminate engagement and leak.
Gear shaping and gear hobbing processing be can adopt for the wide meshed gears rotor of full-depth tooth, heavy-duty gear or polymer transport gear pump directly applied to.
Claims (4)
1. a polymer transport gear pump gear comprises flank profil and tooth root, it is characterized in that: whole flank profil is by the transition curve SA and smooth being formed by connecting of tooth root circular curve order of tooth top circular arc, tooth angle curve EM, flank curve M S, flank and tooth root; Whole tooth curve does not have singular point, gearless meshing interference and Undercutting Phenomenon; The gear number of teeth is 12～20, and type tooth friction angle is less than conventional gears, and surface of contact is greater than conventional gears.
2. gear according to claim 1 is characterized in that, described flank curve M S is a sinusoidal curve, and contact strength and flexural strength will be higher than involute gear.
3. gear according to claim 1 is characterized in that, described transition curve is a prolate epicycloid, and tooth angle is a wedge angle.
4. gear according to claim 1 is characterized in that, described transition curve is a curtate epicycloid, and tooth angle is a fillet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520047536 CN2856494Y (en) | 2005-12-15 | 2005-12-15 | Gear of polymer delivery gear pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520047536 CN2856494Y (en) | 2005-12-15 | 2005-12-15 | Gear of polymer delivery gear pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2856494Y true CN2856494Y (en) | 2007-01-10 |
Family
ID=37599802
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520047536 Expired - Fee Related CN2856494Y (en) | 2005-12-15 | 2005-12-15 | Gear of polymer delivery gear pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2856494Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102953981A (en) * | 2012-11-22 | 2013-03-06 | 无锡惠山泵业有限公司 | Oil pump rotor |
| CN108757845A (en) * | 2018-06-26 | 2018-11-06 | 李诗濛 | Planetary-gear speed reducer and electromechanical equipment |
-
2005
- 2005-12-15 CN CN 200520047536 patent/CN2856494Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102953981A (en) * | 2012-11-22 | 2013-03-06 | 无锡惠山泵业有限公司 | Oil pump rotor |
| CN102953981B (en) * | 2012-11-22 | 2016-03-30 | 江苏高博智融科技有限公司 | Oil hydraulic-pump rotor |
| CN108757845A (en) * | 2018-06-26 | 2018-11-06 | 李诗濛 | Planetary-gear speed reducer and electromechanical equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101290009A (en) | All-tooth profile engaged dedicated gear | |
| CN111062103A (en) | Metallurgical crane reducer gear service life assessment method with optimized parameters | |
| CN102828954B (en) | Novel rotor profile of twin-screw compressor | |
| CN107023480B (en) | A kind of complete smooth twin-screw liquid pump screw rotor | |
| CN2856494Y (en) | Gear of polymer delivery gear pump | |
| CN105605196A (en) | High-strength low-vibration low-noise helical gear drive mechanism | |
| CN1544814A (en) | Medium-high pressure gear pump having asymmetric double-circular-arc gear shape | |
| CN202900668U (en) | Novel double screw compressor rotor | |
| KR20110113541A (en) | Method for designing the gerotor pump | |
| CN1676935A (en) | Rotor tooth profile for helical-lobe compressor | |
| CN203384049U (en) | Double screw rod compressor rotor molded line for oil injection | |
| CN2793433Y (en) | Triple-stage speed reducer with helical and conical gears | |
| CN108757438B (en) | Full-smooth screw rotor with small enclosed volume and design method thereof | |
| CN113062961B (en) | Low-slip-rate gear and design method thereof | |
| CN1651766A (en) | Arc screw tooth shape of large flow double screw pump | |
| Pan et al. | A numerical method for the analysis of the theoretical flow in crescent-type internal gear machines with involute teeth profile | |
| CN103234006A (en) | Differential gear train of double circular arc modified cycloid gear | |
| Kwak et al. | Optimal design of the gerotor (2-ellipses) for reducing maximum contact stress | |
| CN111350665B (en) | Screw rotor set and hydrogen circulating pump with same | |
| CN210889307U (en) | Screw molded line of four-screw pump | |
| Miltenović et al. | Wear load capacity of crossed helical gears | |
| CN107829931A (en) | A kind of Twin-screw vacuum pump molded lines of rotor | |
| CN110005609B (en) | Smooth rotor profile of double-screw vacuum pump and design method thereof | |
| CN108757439B (en) | Double-head full-smooth screw rotor of double-screw liquid pump and design method thereof | |
| CN201973432U (en) | Oil pump rotor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070110 Termination date: 20100115 |