CN-121976949-A - Symmetrical single-claw rotor and claw type fluid machinery with same

CN121976949ACN 121976949 ACN121976949 ACN 121976949ACN-121976949-A

Abstract

The invention relates to the field of variable capacity type fluid machinery, in particular to a symmetrical single-claw rotor and a claw type fluid machinery with the same, wherein the symmetrical single-claw rotor comprises two claw type rotors which have the same section molded lines and can do synchronous different-direction double-rotation motion around respective rotation centers, and the section molded lines of the claw type rotors comprise cycloids, points, claw top circular arcs, eccentric circular arcs, higher-order curves, pitch circular arcs, conjugate curves of the higher-order curves and conjugate curves of the eccentric circular arcs and claw bottom circular arcs which are sequentially connected. In the invention, as the section molded lines of the two claw rotors are completely identical, cycloids, claw top circular arcs, eccentric circular arcs and high-order curves are adopted to form the claw parts of the claw rotors, the formation of a plurality of working cavities in the mixing process is avoided, the problems of repeated compression and expansion of gas caused by the division and combination of the plurality of working cavities in the mixing process are solved, the irreversible loss and the power consumption are reduced, and the working efficiency is effectively improved.

Inventors

PAN SHIYANG
LI ZHENGGUI
LI ZHENYU
LIU SHOUCHUN
CHEN QINGYU
LU CHANGSHEN
ZHAO YUE
YANG XIYUAN

Assignees

西华大学
青海理工学院

Dates

Publication Date: 20260505
Application Date: 20260402

Claims (10)

1. The symmetrical single-claw rotor is characterized by comprising two claw rotors which have the same section line and can do synchronous opposite double-rotation motion around respective rotation centers; The section profile of the claw type rotor comprises cycloid, point, claw top arc, eccentric arc, higher order curve, pitch arc, conjugate curve of higher order curve, conjugate curve of eccentric arc and claw bottom arc which are connected in sequence.
2. The symmetrical single-claw rotor of claim 1 wherein a rectangular coordinate system is established by taking the rotation center of the claw rotor as an origin, and a claw top circle with a radius of R 1 , a pitch circle with a radius of R 2 , a claw bottom circle with a radius of R 3 and an eccentric circle with a radius of R 4 are made as references; The line shape of the cycloid is determined by the following equation: wherein x AB （t）、y AB (t) is the corresponding coordinates of cycloid on x and y axes, t is an angle parameter; The linearity of the arc of the claw tip is determined by the following equation: wherein x BC （t）、y BC (t) is the corresponding coordinates of the arc of the claw top on the x axis and the y axis; The linearity of the eccentric arc is determined by the following equation: wherein x CD （t）、y CD (t) is the corresponding coordinates of the eccentric arc on the x and y axes, and alpha is the central angle of the claw top arc; the linear shape of the higher order curve is determined by the following equation: Wherein x DE （t）、y DE (t) is the corresponding coordinates of the higher-order curve on the x and y axes; a 0 、a 1 、a 2 、a 3 is the coefficient of the higher order curve, determined by the following set of equations: Wherein beta is the central angle of the eccentric arc, and theta is the central angle of the higher-order curve; the shape of the pitch circle arc is determined by the following equation: Wherein x EF （t）、y EF (t) is the corresponding coordinates of the pitch circle arc on the x and y axes; The linearity of the conjugate curve of the higher order curve is determined by the following equation: wherein x FG （t）、y FG (t) is the corresponding coordinates of the conjugate curve of the higher-order curve on the x and y axes; Phi 1 is the position parameter of the conjugate curve of the higher order curve, and is determined by the following equation: Wherein f (t, phi 1 ) is an envelope curve equation of a higher-order curve solved by adopting an envelope method; The linearity of the conjugate curve of the eccentric arc is determined by the following equation: Wherein x GH （t）、y GH (t) is the corresponding coordinates of the conjugate curve of the eccentric arc on the x and y axes; Phi 2 is the position parameter of the conjugate curve of the eccentric arc, and is determined by the following equation: Wherein f (t, phi 2 ) is an envelope curve equation of the eccentric arc solved by adopting an envelope method; the shape of the arc of the claw bottom is determined by the following equation: wherein x HA （t）、y HA (t) is the corresponding coordinates of the arc of the bottom of the claw on the x and y axes.
3. A claw type fluid machinery, which is characterized by comprising two claw type rotors according to claim 2, wherein the two claw type rotors do synchronous opposite double-rotation motion around respective rotation centers, and the distance between the rotation centers of the two claw type rotors is the diameter of a pitch circle; In the process of synchronous different-direction double-rotation motion of two claw rotors, the cycloid, the point, the claw top arc, the eccentric arc, the higher-order curve, the pitch arc, the conjugate curve of the higher-order curve, the conjugate curve of the eccentric arc and the claw bottom arc of one claw rotor are respectively meshed with the point, the cycloid, the claw bottom arc, the conjugate curve of the eccentric arc, the conjugate curve of the higher-order curve, the pitch arc, the higher-order curve, the eccentric arc and the claw top arc of the other claw rotor.
4. A claw type fluid machinery according to claim 3 further comprising a cylinder (4), a front end cap (1), a rear end cap (5), an air suction port (501) and an air discharge port (502); The cylinder (4) is internally provided with a pump cavity for accommodating two claw rotors; the front end cover (1) and the rear end cover (5) are respectively packaged at two ends of the air cylinder (4); The two claw type rotors divide the pump cavity into two working cavities when performing synchronous different-direction double-rotation movement; The air suction port (501) is arranged on at least one of the front end cover (1) and the rear end cover (5); The exhaust port (502) is arranged on at least one of the front end cover (1) and the rear end cover (5); the air suction port (501) and the air exhaust port (502) are respectively arranged corresponding to the two claw rotors.
5. A claw type fluid machinery according to claim 4 wherein the section profile of the pump cavity comprises two sections of connected circular arcs, the radius of the two sections of circular arcs is the same and slightly larger than the radius of the claw top circle, and the center-to-center distance of the two sections of circular arcs is the diameter of the pitch circle.
6. A claw type fluid machinery according to claim 5 wherein a rectangular coordinate system is established by taking the rotation center of one claw type rotor as an origin, and the line shape of two sections of circular arcs of the pump cavity is respectively determined by the following equation: Wherein x MNO （t）、y MNO (t) is the coordinate corresponding to one of the arcs on the x and y axes, x OPM （t）、y OPM (t) is the coordinate corresponding to the other arc on the x and y axes, and R 9 is the radius corresponding to the arc of the pump cavity.
7. A claw type fluid machinery according to claim 4, wherein said suction port (501) is circular arc-shaped; The starting position of the air suction port (501) is determined by the cycloid of the claw rotor corresponding to the end time of the mixing process; the end position of the air inlet (501) is determined by the conjugate curve of the higher-order curve of the claw rotor corresponding to the start time of the mixing process.
8. The claw type fluid machinery of claim 7 wherein the section profile of the suction port (501) comprises a second inner circular arc, a second end circular arc I, a second outer circular arc and a second end circular arc II which are connected in sequence; Establishing a rectangular coordinate system by taking the rotation center of one claw type rotor as an origin, and respectively making a pitch circle with the radius of R 2 and a claw bottom circle with the radius of R 3 as references; the shape of the second medial arc is determined by the following equation: wherein x kl （t）、y kl (t) is the corresponding coordinate of the second inner circular arc on the x and y axes, R 5 is the corresponding radius of the second inner circular arc, and R 5 ＞R 3 ; the shape of the second outer arc is determined by the following equation: Wherein x ij （t）、y ij (t) is the coordinate of the second outer arc corresponding to the x and y axes, R 6 is the radius corresponding to the second outer arc, R 6 =R 5 +l 1 ,l 1 is the radial distance between the second inner arc and the second outer arc, and R 5 ＜R 6 ＜R 2 .
9. A claw type fluid machinery according to claim 4 wherein said exhaust port (502) is circular arc-shaped; the starting position of the exhaust port (502) is determined by the pressure ratio, the content ratio and the suction volume of the claw type fluid machine and is constrained by the conjugate curve of the higher-order curve of the corresponding claw type rotor; The end position of the exhaust port (502) is determined by the cycloid of the claw rotor corresponding to the start of the mixing process.
10. The fluid machinery of claim 9, wherein said cross-sectional profile of said exhaust port (502) comprises a first inner arc, a first end arc, a first outer arc, and a first end arc two, all of which are sequentially connected; Establishing a rectangular coordinate system by taking the rotation center of one claw type rotor as an origin, and respectively making a pitch circle with the radius of R 2 and a claw bottom circle with the radius of R 3 as references; The line shape of the first inner arc is determined by the following equation: Wherein x IJ （t）、y IJ (t) is the corresponding coordinate of the first inner circular arc on the x and y axes, R 7 is the corresponding radius of the first inner circular arc, and R 7 ＞R 3 ; The line shape of the first outer arc is determined by the following equation: wherein x KL （t）、y KL (t) is the coordinate of the first outer arc corresponding to the x and y axes, R 8 is the radius corresponding to the first outer arc, R 8 =R 7 +l 2 ,l 2 is the radial distance between the first inner arc and the first outer arc, and R 7 ＜R 8 ＜R 2 .

Description

Symmetrical single-claw rotor and claw type fluid machinery with same Technical Field The invention relates to the field of variable capacity fluid machinery, in particular to a symmetrical single-claw rotor and a claw type fluid machinery with the same. Background The claw type fluid machinery mainly comprises a cylinder, an end cover, a pair of claw type rotors meshed with each other, an air suction port, an air exhaust port and the like. In the working process, the two claw rotors do synchronous opposite double-rotation motion around the respective rotation centers, a plurality of working cavities are formed between the two claw rotors, the volumes of the working cavities are periodically changed along with the rotation angles, and then the pressurizing and conveying of gas are completed. The claw type fluid machinery has the advantages of internal compression process, dry oil-free, compact structure, easy serial connection, high reliability and the like, and is widely applied to the fields of semiconductor manufacturing, aerospace, photovoltaic integration, petrochemical industry and the like. The claw rotor is a key component of the claw fluid machine, and the optimal design of the rotor section profile is one of key factors for improving the efficiency of the claw fluid machine and reducing the power consumption and leakage of the claw fluid machine. Due to the special structural characteristics of the claw type rotor, besides the suction, compression and exhaust processes, a unique and complex mixing process exists in the claw type fluid machine in operation, so that the claw type fluid machine has low working efficiency and high power consumption. Disclosure of Invention In view of the above, the present invention provides a symmetrical single-claw rotor and a claw-type fluid machine having the same, which aims to improve the working efficiency and reduce the power consumption. In order to solve the technical problems, the invention adopts the following technical scheme: The symmetrical single-claw rotor comprises two claw rotors with the same section molded lines and capable of synchronously and anisotropically performing double-rotation motion around respective rotation centers, wherein the section molded lines of the claw rotors comprise cycloids, points, claw top circular arcs, eccentric circular arcs, higher-order curves, pitch circular arcs, conjugate curves of the higher-order curves, conjugate curves of the eccentric circular arcs and claw bottom circular arcs which are sequentially connected. As an alternative embodiment, a rectangular coordinate system is established by taking the rotation center of the claw type rotor as an origin, and a claw top circle with the radius of R 1, a pitch circle with the radius of R 2, a claw bottom circle with the radius of R 3 and an eccentric circle with the radius of R 4 are made as references; The line shape of the cycloid is determined by the following equation: wherein x AB（t）、yAB (t) is the corresponding coordinates of cycloid on x and y axes, t is an angle parameter; The linearity of the arc of the claw tip is determined by the following equation: wherein x BC（t）、yBC (t) is the corresponding coordinates of the arc of the claw top on the x axis and the y axis; The linearity of the eccentric arc is determined by the following equation: wherein x CD（t）、yCD (t) is the corresponding coordinates of the eccentric arc on the x and y axes, and alpha is the central angle of the claw top arc; the linear shape of the higher order curve is determined by the following equation: Wherein x DE（t）、yDE (t) is the corresponding coordinates of the higher-order curve on the x and y axes; a 0、a1、a2、a3 is the coefficient of the higher order curve, determined by the following set of equations: Wherein beta is the central angle of the eccentric arc, and theta is the central angle of the higher-order curve; the shape of the pitch circle arc is determined by the following equation: Wherein x EF（t）、yEF (t) is the corresponding coordinates of the pitch circle arc on the x and y axes; The linearity of the conjugate curve of the higher order curve is determined by the following equation: wherein x FG（t）、yFG (t) is the corresponding coordinates of the conjugate curve of the higher-order curve on the x and y axes; Phi 1 is the position parameter of the conjugate curve of the higher order curve, and is determined by the following equation: Wherein f (t, phi 1) is an envelope curve equation of a higher-order curve solved by adopting an envelope method; The linearity of the conjugate curve of the eccentric arc is determined by the following equation: Wherein x GH（t）、yGH (t) is the corresponding coordinates of the conjugate curve of the eccentric arc on the x and y axes; Phi 2 is the position parameter of the conjugate curve of the eccentric arc, and is determined by the following equation: Wherein f (t, phi 2) is an envelope curve equation of the eccentric arc solved by adopting an enve