CN206329493U - A kind of rotor molded line of screw vacuum pump - Google Patents

A kind of rotor molded line of screw vacuum pump Download PDF

Info

Publication number
CN206329493U
CN206329493U CN201621341831.6U CN201621341831U CN206329493U CN 206329493 U CN206329493 U CN 206329493U CN 201621341831 U CN201621341831 U CN 201621341831U CN 206329493 U CN206329493 U CN 206329493U
Authority
CN
China
Prior art keywords
circle
rotor
molded line
radius
epicycloid
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
CN201621341831.6U
Other languages
Chinese (zh)
Inventor
干蜀毅
王永庆
徐飞
潘成程
谭昱泉
汪祚远
许涛
王贵
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZHEJIANG VACUUM EQUIPMENT GROUP CO Ltd
Hefei University of Technology
Original Assignee
ZHEJIANG VACUUM EQUIPMENT GROUP CO Ltd
Hefei University of Technology
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by ZHEJIANG VACUUM EQUIPMENT GROUP CO Ltd, Hefei University of Technology filed Critical ZHEJIANG VACUUM EQUIPMENT GROUP CO Ltd
Priority to CN201621341831.6U priority Critical patent/CN206329493U/en
Application granted granted Critical
Publication of CN206329493U publication Critical patent/CN206329493U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The utility model discloses a kind of rotor molded line of screw vacuum pump, including prolate epicycloid AB, radius is RrRoot circle BC, radius is r1‑RrTransition circle CG, hypocycloid GD, epicycloid DE, radius is Rt‑r1Transition circle EF and radius be RtOutside circle FA.Compared with prior art, rotor molded line of screw vacuum pump of the present utility model is a kind of new conjugate rotors molded line, two rotors are identical, it is single head asymmetric tooth, screw rotor correct engagement under the drive of synchromesh gear, during synchronous axial system, between cog interference will not occur for optional position and corner, possess complete pitch curve.Simultaneously, this molded line rotor both effectively delivers torque, solve again because leakage of the gas that causes of leakage triangle from the higher inter-tooth volume of pressure to the relatively low neighbouring inter-tooth volume of pressure, ensure that pump has higher volumetric efficiency, and other relative molded lines of rotor possess higher area utilization factor, processing and testing cost are low.

Description

A kind of rotor molded line of screw vacuum pump
Technical field
The utility model is related to the technical field of screw vacuum pump, more particularly to a kind of suitable for Twin-screw vacuum pump Screw rotor molded line.
Background technology
The core component of Twin-screw vacuum pump is a pair of intermeshing noncontact screw rotors.The design of screw rotor will Flank interference does not occur when realizing synchro-meshing campaign, therefore the research of the molded line of screw rotor is dry screw vacuum pump research and development Key technology, be also screw pump technology research focus.The quality of its molded line will directly affect the performance of screw pump, such as seal Property, area utilization factor, theoretical pumping speed etc., while determining the processing and manufacturing cost of screw rotor.The some screw vacuum pumps of tradition Molded lines of rotor can not obtain complete pitch curve, and screw rotor front stage gas leakage, sealing is poor, and rotor flank profil is wear-resistant Ability is low, and these problems will have a strong impact on pumping performance and the life-span of pump.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art there is provided a kind of rotor molded line of screw vacuum pump, To provide a kind of new screw rotor molded line, imperfect classic screw rotor pitch curve, front stage gas leakage, sealing are solved Difference, the low technical problem of wear resistance.
The utility model is achieved through the following technical solutions:
A kind of rotor molded line of screw vacuum pump, constitutes rotor end-face molded line, counterclockwise successively using seven sections of curves For prolate epicycloid AB, radius is RrRoot circle BC, radius is r1-RrTransition circle CG, hypocycloid GD, epicycloid DE, radius For Rt-r1Transition circle EF and radius be RtOutside circle FA, wherein, Rt+Rr=2r1, r1For the pitch radius of screw rotor; The screw rotor molded line is applied to two screw rotors, two screw rotors are conjugated and molded line is identical, when both synchronize During incorgruous dual AC power motion, complete meshing relation can be realized.
Further, the equation in coordinates formula of the prolate epicycloid AB is:
In formula,For parameter.
Further, the equation in coordinates formula of the hypocycloid GD is:
The equation in coordinates formula of the epicycloid DE is:
In formula, φ is parameter, P1The distance in the center of circle of circle, C are generated apart from hypocycloid GD for D points1Generated for hypocycloid GD The round center of circle is to the distance in the pitch circle center of circle, P2The distance in the center of circle of circle, C are generated apart from epicycloid DE for D points2Given birth to for epicycloid DE Distance of the Cheng Yuan center of circle to the pitch circle center of circle.It is in smoothing junction between hypocycloid GD and epicycloid DE.
The utility model has advantages below compared with prior art:The utility model provides a kind of screw vacuum pump rotor Molded line, the screw rotor has drawn the advantage of domestic and international existing screw rotor molded line, is a kind of new conjugate rotors molded line, two Rotor is identical, simply oppositely oriented, is single head asymmetric tooth.Screw rotor is correctly nibbled under the drive of synchromesh gear Close, synchronous axial system, optional position, any rotation angle will not occur between cog interference, possess complete pitch curve.This molded line rotor Both torque is effectively delivered, is solved again because the gas that causes of leakage triangle is from the higher inter-tooth volume of pressure to pressure The leakage of relatively low neighbouring inter-tooth volume, it is ensured that pump has higher volumetric efficiency, and other relative molded lines of rotor possess higher Area utilization factor, processing and testing cost are low.Transition arc improves the wear resistance of flank profil.
Brief description of the drawings
Fig. 1 is the formation mechenism figure of rotor molded line of screw vacuum pump of the present utility model, wherein, circle 1 is basic circle (section Circle), circle 2 is that prolate epicycloid AB generates circle, and circle 3 is that hypocycloid GD generates circle, and circle 4 is that epicycloid DE generates circle;
Fig. 2 is the face type line chart of rotor molded line of screw vacuum pump of the present utility model.
Embodiment
1-2 further illustrates a kind of specific embodiment party of rotor molded line of screw vacuum pump of the utility model below in conjunction with the accompanying drawings Formula.
From Figure 2 it can be seen that the tooth-shaped molded line of screw sections is main by prolate epicycloid AB, radius is RrRoot circle BC, half Footpath is r1-RrTransition circle CG, hypocycloid GD, epicycloid DE, radius is Rt-r1Transition circle EF and radius be RtOutside circle FA Composition, and hypocycloid GD and epicycloid DE be smoothly connected in D points, as seen from Figure 1 in Fig. 2 each section of curve formation mechenism.
Prolate epicycloid AB formation mechenism is:Radius is the basic circle 1 and generation circle 2 of pitch circle size, generates circle 2 along base When circle 1 makees fricton-tight roll counter-clockwise, the movement locus for being fixed on a point A on generation circle 2 is prolate epicycloid AB, and is generated 2 center of circle O of circle2To A points apart from O2A length is equal to outside circle FA radiuses Rt, and track moves to and stop when intersecting with outside circle. Prolate epicycloid AB equation in coordinates formula is met:
In formula,For parameter.
Hypocycloid GD formation mechenism is:Radius is inscribed within basic circle 1 for the generation circle 3 of 1/3rd pitch circle sizes, generates Circle 3 along basic circle 1 make pure rolling counterclockwise when, it is hypocycloid GD to be fixed on the movement locus of a point D on generation circle 3.
Epicycloid DE formation mechenism is:Radius generates to be cut in basic circle 1 outside the generation circle 4 of 1/3rd pitch circle sizes Circle 4 along basic circle 1 make pure rolling clockwise when, it is epicycloid DE to be fixed on the movement locus of a point D on generation circle 4.
Hypocycloid GD equation in coordinates formula is met:
Epicycloid DE equation in coordinates formula is met:
In formula, φ is parameter, P1The distance in the center of circle of circle, C are generated apart from hypocycloid GD for D points1Generated for hypocycloid GD The round center of circle is to the distance in the pitch circle center of circle, P2The distance in the center of circle of circle, C are generated apart from epicycloid DE for D points2Given birth to for epicycloid DE Distance of the Cheng Yuan center of circle to the pitch circle center of circle.
The circle of setting generation herein 3 is 1/3rd of the radius of basic circle 1 with generation circle 4, so greatly simplifies curved dies, The convenient all technical for calculating molded line and rotor, is easy to the processing of rotor, detects.
With, a little for the center of circle, make on basic circle 1 circular arc simultaneously with BC sections and GD sections tangent, the transition circles in as Fig. 2 CG.Again with, a little for the center of circle, make on basic circle 1 circular arc simultaneously with DE sections and FA sections tangent, the transition circle EF in as Fig. 2. So far, a kind of rotor molded line of screw vacuum pump of the present utility model is obtained, as shown in Figure 2.
The driving and driven screw rotor of this tooth-shaped molded line formation, can shape between its front stage and pump case in engagement process Into the annular seal space strictly sealed in theory, leakage triangle is eliminated, it is to avoid the leakage of rotor front stage gas.Reduce spiral shell Abrasion when bar is run, improves the wearability of Quimby pump.This molded line possesses the area utilization factor almost for 0.5, significantly Improve pumping efficiency.It is in smoothing junction between hypocycloid GD and epicycloid DE.
It is above a kind of detailed embodiment of the utility model and specific operating process, is with the utility model technology It is lower premised on scheme to be implemented, but protection domain of the present utility model is not limited to the above embodiments.

Claims (4)

1. a kind of rotor molded line of screw vacuum pump, it is characterised in that using seven sections of curve composition rotor end-face molded line, by counterclockwise Direction is followed successively by prolate epicycloid AB, and radius is RrRoot circle BC, radius is r1-RrTransition circle CG, hypocycloid GD, outer pendulum Line DE, radius is Rt-r1Transition circle EF and radius be RtOutside circle FA, wherein, Rt+Rr=2r1, r1For the section of screw rotor Radius of circle.
2. a kind of rotor molded line of screw vacuum pump according to claim 1, it is characterised in that the prolate epicycloid AB's Equation in coordinates formula is:
In formula,For parameter.
3. a kind of rotor molded line of screw vacuum pump according to claim 1, it is characterised in that:
The equation in coordinates formula of the hypocycloid GD is:
x = P 1 s i n 2 φ - C 1 s i n φ y = - P 1 c o s 2 φ - C 1 c o s φ
The equation in coordinates formula of the epicycloid DE is:
x = C 2 s i n φ - P 2 s i n 4 φ y = - C 2 c o s φ + P 2 c o s 4 φ
In formula, φ is parameter, P1The distance in the center of circle of circle, C are generated apart from hypocycloid GD for D points1Circle is generated for hypocycloid GD The center of circle is to the distance in the pitch circle center of circle, P2The distance in the center of circle of circle, C are generated apart from epicycloid DE for D points2Generate and justify for epicycloid DE The center of circle to the pitch circle center of circle distance.
4. according to a kind of any described rotor molded line of screw vacuum pump of claim 1-3, it is characterised in that the hypocycloid GD It is in smoothing junction between epicycloid DE.
CN201621341831.6U 2016-12-08 2016-12-08 A kind of rotor molded line of screw vacuum pump Expired - Fee Related CN206329493U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201621341831.6U CN206329493U (en) 2016-12-08 2016-12-08 A kind of rotor molded line of screw vacuum pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201621341831.6U CN206329493U (en) 2016-12-08 2016-12-08 A kind of rotor molded line of screw vacuum pump

Publications (1)

Publication Number Publication Date
CN206329493U true CN206329493U (en) 2017-07-14

Family

ID=59289735

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201621341831.6U Expired - Fee Related CN206329493U (en) 2016-12-08 2016-12-08 A kind of rotor molded line of screw vacuum pump

Country Status (1)

Country Link
CN (1) CN206329493U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106401958A (en) * 2016-12-08 2017-02-15 合肥工业大学 Screw vacuum pump rotor profile

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106401958A (en) * 2016-12-08 2017-02-15 合肥工业大学 Screw vacuum pump rotor profile

Similar Documents

Publication Publication Date Title
CN105240277B (en) Fully-smooth screw rotor of twin-screw vacuum pump
CN205388011U (en) Screw rotor of no acute angle cusp and twin screw vacuum pump thereof
CN105317677B (en) A kind of screw rotor without acute angle cusp
CN205388015U (en) Twin screw vacuum pump's complete glossy screw rotor and vacuum pump thereof
CN106401958B (en) A kind of rotor molded line of screw vacuum pump
CN105822548B (en) A kind of complete smooth claw rotor
CN104929942B (en) A kind of claw-type rotor profile of full engagement
CN206957921U (en) A kind of complete smooth screw rotor based on eccentric circle involute
CN105332914B (en) A kind of complete smooth screw rotor
CN206329493U (en) A kind of rotor molded line of screw vacuum pump
CN203130514U (en) Double screw vacuum pump and rotor thereof
CN101545488B (en) End face tooth form of novel screw compressor
CN206017138U (en) A kind of oval arc-shaped roots rotor
CN108757438A (en) A kind of complete smooth screw rotor and its design method of small enclosed volume
CN106194728B (en) A kind of complete smooth straight pawl claw rotor
CN202900668U (en) Novel double screw compressor rotor
CN206487619U (en) A kind of complete smooth straight pawl claw rotor
CN205638919U (en) Complete glossy claw formula rotor
CN206071869U (en) A kind of straight pawl claw rotor
CN203867895U (en) Tooth profile of rotor of dry twin-screw compressor
CN108050059A (en) A kind of nothing is stranded the lobe pump of liquid phenomenon
CN108757464A (en) A kind of straight pawl rotor and its Profile Design method of claw vacuum pump
CN207161329U (en) A kind of complete smooth three screw pump screw rotor
CN206694248U (en) A kind of complete smooth twin-screw liquid pump screw rotor
CN206017135U (en) A kind of SANYE oval arc-shaped cam follower

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20170714

Termination date: 20181208

CF01 Termination of patent right due to non-payment of annual fee