CN210218104U - Variable cross-section scroll wrap of scroll compressor - Google Patents

Variable cross-section scroll wrap of scroll compressor Download PDF

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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
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involute
trigonometric function
tooth
scroll
trigonometric
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Inventor
Zhoujin Xi
奚周瑾
Sheng Zhao
赵胜
Jun Wang
王君
Xiangyan Li
李祥艳
Chao Xu
许超
Lining Dong
董丽宁
Chentao Liang
梁晨涛
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China University of Petroleum UPC East China
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China University of Petroleum UPC East China
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Abstract

The utility model discloses a variable cross-section 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 cross-section 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

Variable cross-section scroll wrap of scroll compressor
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 full-meshing variable-wall-thickness scroll vacuum pump [ P ] Shandong: CN107939681A,2018-04-20.) discloses a full-meshing variable-wall-thickness scroll vacuum pump, the molded line of the scroll tooth of which consists of a circular involute and a high-order continuous curve, compared with the uniform-section 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, 9605675,2017-03-28 (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 cross-section 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 cross-section 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 cross-section 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 cross-section 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 cross-section 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 cross-section scroll wrap of the scroll compressor is characterized in that a base circle center point O is an original point of a two-dimensional 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 involute1b1Is an outside normal equidistant curve of a trigonometric function involute ab, and the distance of the normal equidistant curve is a gyration radius RorThe equation is:
second equidistant curve a of trigonometric involute2b2Is a first equidistant curve a of an involute of a trigonometric function1b1The 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 a3b3For a second equidistant curve a of the trigonometric involute2b2The distance of the normal equidistance is the radius of gyration RorThe equation is:
in the formula: ror-radius of gyration; delta-tooth 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 involute1b1In the above, the third trigonometric function involute EF is on the second equidistant curve a of the trigonometric function involute2b2In the above, the fourth trigonometric function involute GH is on the third equidistant curve a of the trigonometric function involute3b3The above.
The utility model discloses a beneficial result does:
① the profile of the variable cross-section 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 cross-section 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: 1-fixed spiral wrap (1), 2-movable spiral wrap (2), ab-trigonometric function involute, a1b1-first equidistant curve of involute of trigonometric function, a2b2-second equidistant curve of involute of trigonometric function, a3b3-trigonometric function involute third equidistant curve, AB-first thirdAngle function involute, CD-second trigonometric function involute, EF-third trigonometric function involute, GH-fourth trigonometric function involute, delta1Tooth thickness at the center of the fixed spiral wrap (1), delta2Intermediate position tooth thickness, delta, of the fixed spiral wrap (1)3Outer ring tooth thickness, p, of the fixed spiral wrap (1)1The pitch, p, of the first turn of the trigonometric involute ab2The pitch, p, of the second turn of the trigonometric involute ab3-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 two-dimensional 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 ab1Pitch p of the smaller, second turn2Increasing the pitch p of the third turn3Decrease, i.e. p1<p2,p2>p3
As shown in fig. 2, is an equidistant graph of a trigonometric function involute ab, a first equidistant curve a of the trigonometric function involute1b1Is an outside normal equidistant curve of a trigonometric function involute ab, and the distance of the normal equidistant curve is a gyration radius RorThe equation is:
second equidistant curve a of trigonometric involute2b2Is a first equidistant curve a of an involute of a trigonometric function1b1The 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 a3b3For a second equidistant curve a of the trigonometric involute2b2The distance of the normal equidistance is the radius of gyration RorThe equation is:
in the formula: ror-radius of gyration; delta-tooth 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 RorThe 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 Ror
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 13And tooth thickness delta at the center1Small, middle tooth thickness delta2Larger, i.e. delta12,δ23
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 cross-section 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 two-dimensional 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 involute1b1Is an outside normal equidistant curve of a trigonometric function involute ab, and the distance of the normal equidistant curve is a gyration radius RorThe equation is:
second equidistant curve a of trigonometric involute2b2Is a first equidistant curve a of an involute of a trigonometric function1b1The 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 a3b3For a second equidistant curve a of the trigonometric involute2b2The distance of the normal equidistance is the radius of gyration RorThe equation is:
in the formula: ror-radius of gyration; delta-tooth 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 involute1b1In the above, the third trigonometric function involute EF is on the second equidistant curve a of the trigonometric function involute2b2In the above, the fourth trigonometric function involute GH is on the third equidistant curve a of the trigonometric function involute3b3The above.
CN201921166535.0U 2019-07-24 2019-07-24 Variable cross-section scroll wrap of scroll compressor Active CN210218104U (en)

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Application Number Priority Date Filing Date Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112483404A (en) * 2020-11-30 2021-03-12 兰州理工大学 Variable-section scroll wrap composed of variable-diameter base circles and molded line design method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112483404A (en) * 2020-11-30 2021-03-12 兰州理工大学 Variable-section scroll wrap composed of variable-diameter base circles and molded line design method thereof
CN112483404B (en) * 2020-11-30 2021-12-31 兰州理工大学 Variable-section scroll wrap composed of variable-diameter base circles and molded line design method thereof

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