CN210218104U  Variable crosssection scroll wrap of scroll compressor  Google Patents
Variable crosssection scroll wrap of scroll compressor Download PDFInfo
 Publication number
 CN210218104U CN210218104U CN201921166535.0U CN201921166535U CN210218104U CN 210218104 U CN210218104 U CN 210218104U CN 201921166535 U CN201921166535 U CN 201921166535U CN 210218104 U CN210218104 U CN 210218104U
 Authority
 CN
 China
 Prior art keywords
 involute
 trigonometric function
 tooth
 scroll
 trigonometric
 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.)
 Active
Links
 238000000034 method Methods 0.000 claims description 5
 230000003247 decreasing Effects 0.000 claims description 3
 230000003068 static Effects 0.000 abstract description 4
 238000007906 compression Methods 0.000 description 6
 238000010586 diagram Methods 0.000 description 4
 238000005057 refrigeration Methods 0.000 description 2
 238000006073 displacement reaction Methods 0.000 description 1
 239000012530 fluid Substances 0.000 description 1
 230000004048 modification Effects 0.000 description 1
 238000006011 modification reaction Methods 0.000 description 1
 230000000737 periodic Effects 0.000 description 1
Abstract
The utility model discloses a variable crosssection scroll wrap of a scroll compressor, wherein the molded line of the scroll wrap is a variable base circle involute based on a trigonometric function, namely a trigonometric function involute; the molded line of the fixed vortex tooth (1) consists of a first trigonometric function involute AB and a fourth trigonometric function involute GH, and the molded line of the movable vortex tooth (2) consists of a second trigonometric function involute CD and a third trigonometric function involute EF; during the operation, the movable vortex tooth (2) and the fixed vortex tooth (1) can be correctly meshed. The variable crosssection vortex tooth has simple molded line composition, the tooth thickness of the outer ring of the static vortex tooth and the tooth thickness of the center are smaller, the tooth thickness of the middle position is larger, the number of turns of the vortex tooth and the length of a leakage line can be reduced, and the leakage amount is reduced; meanwhile, the movable vortex teeth are equal in tooth thickness and small in tooth thickness, the movable vortex teeth are small in mass, small in rotation inertia force and good in dynamic property.
Description
Technical Field
The utility model belongs to the technical field of compressor engineering, in particular to scroll compressor's variable cross section vortex tooth.
Background
The scroll compressor is a positive displacement fluid machine, the movable scroll performs revolution translation in the working process, the movable scroll teeth and the fixed scroll teeth are meshed with each other to form a crescent working cavity with a plurality of pairs of periodic changes, and the working process of gas suction, compression and discharge is completed along with the continuous rotation of a crankshaft. The air conditioner refrigeration system has the remarkable characteristics of simple structure, few parts, stable operation, low noise and high reliability, and is widely applied to the fields of air conditioner refrigeration, medical equipment and vacuum systems. The molded line of the scroll wrap directly affects the working performance of the scroll compressor, so the molded line design of the scroll wrap is extremely critical.
When the compression ratio requirement of the scroll compressor is higher, the number of required scroll wraps is larger, so that the size of the whole machine and the length of a leakage line are increased, and the leakage is aggravated. Chinese patent (Wangjun, Cao Chenyan, Shujie, Weishuhong, Yanshuran, Zhao mountain, a fullmeshing variablewallthickness scroll vacuum pump [ P ] Shandong: CN107939681A,20180420.) discloses a fullmeshing variablewallthickness scroll vacuum pump, the molded line of the scroll tooth of which consists of a circular involute and a highorder continuous curve, compared with the uniformsection scroll tooth with the same size, the compression ratio of the compressor is increased, the length and the leakage of the molded line of the scroll tooth are reduced, but the molded line is complex, and the tooth thickness of the movable scroll tooth is larger, so that the movable scroll tooth has larger mass, large rotational inertia force and reduced dynamic characteristics. U.S. Pat. No. 4, 9605675,20170328 (Park Inwon, Choi Seheon, Lee Byeong chul, Yoo Byungkil. scroll compressor with constant section of moving and static scroll teeth, and moving and static scroll teeth line composed of logarithm, multiple curve and arc, can improve the air intake and compression ratio, but the line composition is more complicated.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems that the number of required turns of the scroll teeth is large, the leakage line length is long, the molded line of the existing variable crosssection scroll teeth is complex, and the dynamic characteristic of the movable scroll teeth is poor due to large mass under the requirement of high compression ratio, the utility model provides a variable crosssection scroll teeth of a scroll compressor, the molded line of the scroll teeth is composed of a variable base circle involute based on a trigonometric function, namely the trigonometric function involute, the pitch of the variable crosssection scroll teeth is firstly increased and then reduced from the center to the outside, so that correct meshing can be realized, the molded line composition is simple, the tooth thickness of the outer ring of the static scroll teeth and the tooth thickness of the center are smaller, the tooth thickness of the middle position is larger, the number of turns of the scroll teeth and; meanwhile, the tooth thickness of the movable vortex tooth is unchanged, the movable vortex tooth is equal in tooth thickness and smaller in tooth thickness, the movable vortex tooth is small in mass, and the movable vortex tooth is more stable in the revolution translation process and good in dynamic characteristic; the variable crosssection scroll wrap of the scroll compressor has important significance for enriching the type of molded lines of the scroll wrap and improving the working performance of the compressor.
The utility model provides a technical scheme that its technical problem adopted is:
a variable crosssection scroll wrap for a scroll compressor comprising: a fixed wrap and a orbiting wrap;
the constitutive line of the fixed vortex tooth consists of 2 sections of curves, which are sequentially as follows: a first trigonometric function involute AB and a fourth trigonometric function involute GH; the outer ring tooth thickness and the center tooth thickness of the fixed vortex tooth are smaller, and the middle tooth thickness is larger;
the constitutive line of the orbiting scroll consists of 2 curves, in order: a second trigonometric function involute CD and a third trigonometric function involute EF; the tooth thickness of the movable vortex tooth is constant and is equal to the tooth thickness;
during the working process of revolution and translation of the movable vortex tooth, the movable vortex tooth and the fixed vortex tooth can be correctly meshed, namely, the second trigonometric function involute CD and the third trigonometric function involute EF of the movable vortex tooth can be correctly meshed with the first trigonometric function involute AB and the fourth trigonometric function involute GH of the fixed vortex tooth respectively.
The variable crosssection scroll wrap of the scroll compressor is characterized in that a base circle center point O is an original point of a twodimensional coordinate system, and an equation of a trigonometric function involute ab is as follows:
wherein t is an angle parameter; k. omega,C is a constant; the pitch of the trigonometric function involute ab is increased and then decreased from the center to the outside;
first equidistant curve a of trigonometric involute_{1}b_{1}Is an outside normal equidistant curve of a trigonometric function involute ab, and the distance of the normal equidistant curve is a gyration radius R_{or}The equation is:
second equidistant curve a of trigonometric involute_{2}b_{2}Is a first equidistant curve a of an involute of a trigonometric function_{1}b_{1}The normal equidistant distance is the tooth thickness delta of the movable vortex tooth, and the equation is as follows:
trigonometric function involute third equidistant curve a_{3}b_{3}For a second equidistant curve a of the trigonometric involute_{2}b_{2}The distance of the normal equidistance is the radius of gyration R_{or}The equation is:
in the formula: r_{or}radius of gyration; deltatooth thickness of the orbiting scroll wrap;
the first trigonometric function involute AB is on the trigonometric function involute AB, and the second trigonometric function involute CD is on the first equidistant curve a of the trigonometric function involute_{1}b_{1}In the above, the third trigonometric function involute EF is on the second equidistant curve a of the trigonometric function involute_{2}b_{2}In the above, the fourth trigonometric function involute GH is on the third equidistant curve a of the trigonometric function involute_{3}b_{3}The above.
The utility model discloses a beneficial result does:
① the profile of the variable crosssection vortex tooth adopts a variable base circle involute based on trigonometric function, i.e. trigonometric function involute, the profile of the vortex tooth is simple, the outer ring tooth thickness and the center tooth thickness of the fixed vortex tooth are smaller, the middle tooth thickness is larger, the required vortex circle number is reduced, the length of the leakage line is shortened, and the leakage amount is reduced under the requirement of high compression ratio of the vortex compressor.
②, the variable crosssection spiral wrap has constant thickness of the moving spiral wrap, equal thickness of the wrap, small mass of the moving spiral wrap, small rotational inertia force, and good dynamic characteristics.
Drawings
Fig. 1 is a diagram of trigonometric functions, involute ab.
Figure 2 is an isometric plot of the trigonometric function involute ab.
Fig. 3 is a view of the fixed wrap (1) and the orbiting wrap (2) at the revolution center position.
Fig. 4 is a view of the fixed wrap (1).
Fig. 5 is a view of the orbiting scroll wrap (2).
Fig. 6 is a meshing view of the orbiting wrap (2) and the fixed wrap (1).
In the figure: 1fixed spiral wrap (1), 2movable spiral wrap (2), abtrigonometric function involute, a_{1}b_{1}first equidistant curve of involute of trigonometric function, a_{2}b_{2}second equidistant curve of involute of trigonometric function, a_{3}b_{3}trigonometric function involute third equidistant curve, ABfirst thirdAngle function involute, CDsecond trigonometric function involute, EFthird trigonometric function involute, GHfourth trigonometric function involute, delta_{1}Tooth thickness at the center of the fixed spiral wrap (1), delta_{2}Intermediate position tooth thickness, delta, of the fixed spiral wrap (1)_{3}Outer ring tooth thickness, p, of the fixed spiral wrap (1)_{1}The pitch, p, of the first turn of the trigonometric involute ab_{2}The pitch, p, of the second turn of the trigonometric involute ab_{3}the pitch of the third turn of the trigonometric function involute ab.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
As shown in fig. 1, it is a diagram of a trigonometric function involute ab, where the base circle center point O is the origin of the twodimensional coordinate system, and the equation of the trigonometric function involute ab is:
wherein t is an angle parameter; k. omega,C is a constant;
the pitch of the trigonometric function involute ab is increased and then decreased from the center to the outside, and the pitch p of the first circle of the trigonometric function involute ab_{1}Pitch p of the smaller, second turn_{2}Increasing the pitch p of the third turn_{3}Decrease, i.e. p_{1}<p_{2}，p_{2}>p_{3}。
As shown in fig. 2, is an equidistant graph of a trigonometric function involute ab, a first equidistant curve a of the trigonometric function involute_{1}b_{1}Is an outside normal equidistant curve of a trigonometric function involute ab, and the distance of the normal equidistant curve is a gyration radius R_{or}The equation is:
second equidistant curve a of trigonometric involute_{2}b_{2}Is a first equidistant curve a of an involute of a trigonometric function_{1}b_{1}The distance of the normal equidistance is the tooth thickness delta of the movable vortex tooth 2, and the equation is as follows:
trigonometric function involute third equidistant curve a_{3}b_{3}For a second equidistant curve a of the trigonometric involute_{2}b_{2}The distance of the normal equidistance is the radius of gyration R_{or}The equation is:
in the formula: r_{or}radius of gyration; deltatooth thickness of orbiting scroll wrap 2.
As shown in fig. 3, in the drawings of the fixed wrap 1 and the movable wrap 2 at the revolution center position, the line composition of the fixed wrap 1 and the movable wrap 2 is a normal equidistant relationship, the second trigonometric function involute CD of the movable wrap 2 is an outside normal equidistant curve of the first trigonometric function involute AB of the fixed wrap 1, and the distance of the normal equidistant relationship is the radius of gyration R_{or}The third trigonometric function involute EF of the movable vortex tooth 2 is an outer normal equidistant curve of the second trigonometric function involute CD of the movable vortex tooth 2, the distance of the normal equidistant curve is the tooth thickness delta of the movable vortex tooth 2, the fourth trigonometric function involute GH of the fixed vortex tooth 1 is an outer normal equidistant curve of the third trigonometric function involute EF of the movable vortex tooth 2, and the distance of the normal equidistant curve is the gyration radius R_{or}。
As shown in fig. 4, which is a view of the fixed wrap 1, the set of the fixed wrap 1 is composed of 2 curves, which are sequentially: a first trigonometric function involute AB and a fourth trigonometric function involute GH; outer ring tooth thickness delta of fixed vortex tooth 1_{3}And tooth thickness delta at the center_{1}Small, middle tooth thickness delta_{2}Larger, i.e. delta_{1}<δ_{2}，δ_{2}>δ_{3}。
As shown in fig. 5, which is a diagram of the orbiting scroll 2, the composition line of the orbiting scroll 2 is composed of 2 curves, sequentially: a second trigonometric function involute CD and a third trigonometric function involute EF; the tooth thickness δ of the orbiting scroll 2 is constant and equal.
As shown in fig. 6, which is an engagement diagram of the movable spiral wrap 2 and the fixed spiral wrap 1, during the operation of the movable spiral wrap 2 in the orbital translation, the movable spiral wrap 2 and the fixed spiral wrap 1 can be correctly engaged, that is, the second trigonometric function involute CD and the third trigonometric function involute EF of the movable spiral wrap 2 can be correctly engaged with the first trigonometric function involute AB and the fourth trigonometric function involute GH of the fixed spiral wrap 1, respectively.
Although the present invention has been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without inventive work are still within the scope of the present invention.
Claims (2)
1. A variable crosssection scroll wrap for a scroll compressor comprising: the fixed vortex tooth (1) and the movable vortex tooth (2) are characterized in that:
the constitutive line of the fixed vortex tooth (1) consists of 2 sections of curves, which are sequentially as follows: a first trigonometric function involute AB and a fourth trigonometric function involute GH; the outer ring tooth thickness and the center tooth thickness of the fixed vortex tooth (1) are smaller, and the middle tooth thickness is larger;
the composition line of the movable vortex tooth (2) consists of 2 sections of curves, and the sequence is as follows: a second trigonometric function involute CD and a third trigonometric function involute EF; the tooth thickness of the movable vortex tooth (2) is constant and is equal to the tooth thickness;
during the working process of revolution and translation of the movable vortex tooth (2), the movable vortex tooth (2) and the fixed vortex tooth (1) can be correctly meshed, namely, a second trigonometric function involute CD and a third trigonometric function involute EF of the movable vortex tooth (2) can be correctly meshed with a first trigonometric function involute AB and a fourth trigonometric function involute GH of the fixed vortex tooth (1) respectively.
2. A variable area scroll wrap for a scroll compressor as claimed in claim 1, wherein:
the base circle center point O is the origin of the twodimensional coordinate system, and the equation of the trigonometric function involute ab is as follows:
wherein t is an angle parameter; k. omega,C is a constant; the pitch of the trigonometric function involute ab is increased and then decreased from the center to the outside;
first equidistant curve a of trigonometric involute_{1}b_{1}Is an outside normal equidistant curve of a trigonometric function involute ab, and the distance of the normal equidistant curve is a gyration radius R_{or}The equation is:
second equidistant curve a of trigonometric involute_{2}b_{2}Is a first equidistant curve a of an involute of a trigonometric function_{1}b_{1}The distance of the normal equidistance is the tooth thickness delta of the movable vortex tooth (2), and the equation is as follows:
trigonometric function involute third equidistant curve a_{3}b_{3}For a second equidistant curve a of the trigonometric involute_{2}b_{2}The distance of the normal equidistance is the radius of gyration R_{or}The equation is:
in the formula: r_{or}radius of gyration; deltatooth thickness of the orbiting scroll (2);
the first trigonometric function involute AB is on the trigonometric function involute AB, and the second trigonometric function involute CD is on the first equidistant curve a of the trigonometric function involute_{1}b_{1}In the above, the third trigonometric function involute EF is on the second equidistant curve a of the trigonometric function involute_{2}b_{2}In the above, the fourth trigonometric function involute GH is on the third equidistant curve a of the trigonometric function involute_{3}b_{3}The above.
Priority Applications (1)
Application Number  Priority Date  Filing Date  Title 

CN201921166535.0U CN210218104U (en)  20190724  20190724  Variable crosssection scroll wrap of scroll compressor 
Applications Claiming Priority (1)
Application Number  Priority Date  Filing Date  Title 

CN201921166535.0U CN210218104U (en)  20190724  20190724  Variable crosssection scroll wrap of scroll compressor 
Publications (1)
Publication Number  Publication Date 

CN210218104U true CN210218104U (en)  20200331 
Family
ID=69917693
Family Applications (1)
Application Number  Title  Priority Date  Filing Date 

CN201921166535.0U Active CN210218104U (en)  20190724  20190724  Variable crosssection scroll wrap of scroll compressor 
Country Status (1)
Country  Link 

CN (1)  CN210218104U (en) 
Cited By (1)
Publication number  Priority date  Publication date  Assignee  Title 

CN112483404A (en) *  20201130  20210312  兰州理工大学  Variablesection scroll wrap composed of variablediameter base circles and molded line design method thereof 

2019
 20190724 CN CN201921166535.0U patent/CN210218104U/en active Active
Cited By (2)
Publication number  Priority date  Publication date  Assignee  Title 

CN112483404A (en) *  20201130  20210312  兰州理工大学  Variablesection scroll wrap composed of variablediameter base circles and molded line design method thereof 
CN112483404B (en) *  20201130  20211231  兰州理工大学  Variablesection scroll wrap composed of variablediameter base circles and molded line design method thereof 
Similar Documents
Publication  Publication Date  Title 

CN202926637U (en)  Molded line for drytype screw vacuum pump rotor  
CN105971877A (en)  Conical screw rotor and doublescrew vacuum pump thereof  
CN210218104U (en)  Variable crosssection scroll wrap of scroll compressor  
CN105422448A (en)  Variabletoothwidth variablepitch screw rotor  
CN205805908U (en)  A kind of conical screw rotor and Twinscrew vacuum pump thereof  
WO2020134519A1 (en)  Method for determining reasonable design region of roots pump rotor profiles and use thereof  
WO2014026440A1 (en)  Singlehead varyingpitch screw rotor with equal tooth top width  
CN110821835A (en)  Conical screw rotor of doublescrew vacuum pump  
CN205277808U (en)  Become screw rotor of breadth of tooth variable pitch  
CN105952641B (en)  A kind of threestage screw rotor and its Twinscrew vacuum pump  
CN105317677A (en)  Screw rotor without acuteangle cusp  
CN105485014B (en)  A kind of screw rotor of uniform pitch Varied pole piece  
CN110285053A (en)  A kind of variable crosssection scroll wrap and its Profile Design method of screw compressor  
CN105257537A (en)  Rotor end face flute profile of threetooth screw compressor  
CN106438370B (en)  A kind of varying pitch conical screw rotor of selfbalancing  
CN105332914A (en)  Totallysmooth screw rotor  
JP4839443B2 (en)  Screw vacuum pump  
CN107084131B (en)  A kind of complete smooth screw rotor based on eccentric circle involute  
CN206111552U (en)  Spiral rotor with sealed rib  
CN210217842U (en)  Vortex expander with variable crosssection vortex teeth  
CN210218105U (en)  Eccentric involute Roots rotor  
CN109281832A (en)  A kind of three scroll wraps and its meshing profile design method of screw compressor  
WO2014026439A1 (en)  Singlehead varying pitch screw rotor with uniform tooth top width  
CN211623716U (en)  Conical screw rotor of doublescrew vacuum pump  
CN112483405B (en)  Variable crosssection vortex tooth consisting of algebraic spiral and molded line design method thereof 
Legal Events
Date  Code  Title  Description 

GR01  Patent grant  
GR01  Patent grant 