阅读说明：本技术 一种锥形单螺杆气液混输泵的转子与定子 (Rotor and stator of conical single-screw gas-liquid mixed delivery pump ) 是由 王君 董丽宁 刘译阳 武萌 谈庆朋 奚周瑾 于 2020-07-01 设计创作，主要内容包括：本发明公开了一种锥形单螺杆气液混输泵的转子与定子,包括锥形转子(1)和锥形定子(2)；锥形转子(1)和锥形定子(2)从入口端面(Ⅰ-Ⅰ)到出口端面(Ⅲ-Ⅲ),各截面型线半径和偏心距均以截面几何中心为基点呈线性锥形减小,各截面均能够实现完全正确啮合；所公开的气液混输泵不但增大了单螺杆气液混输泵的入口流量,而且提高了内容积比,使得出口压力更大,适用范围和应用领域更广；同时,在气液比升高的情况下,仍然能够有效避免形成气塞、在相同的出、入口参数下,随着螺杆长度的减小,摩擦磨损、泄漏也相应减小,螺杆寿命更长。(The invention discloses a rotor and a stator of a conical single-screw gas-liquid mixed delivery pump, which comprise a conical rotor (1) and a conical stator (2); the conical rotor (1) and the conical stator (2) are linearly and conically reduced from the inlet end face (I-I) to the outlet end face (III-III) by taking the geometric center of the cross section as a basic point, and the cross sections can be completely and correctly meshed; the disclosed gas-liquid mixed delivery pump not only increases the inlet flow of the single-screw gas-liquid mixed delivery pump, but also improves the internal volume ratio, so that the outlet pressure is larger, and the application range and the application field are wider; meanwhile, under the condition that the gas-liquid ratio is increased, the formation of an air plug can be still effectively avoided, the friction wear and the leakage are correspondingly reduced along with the reduction of the length of the screw under the condition of the same outlet and inlet parameters, and the service life of the screw is longer.)

1. A rotor and a stator of a conical single-screw gas-liquid mixed transmission pump comprise: conical rotor (1) and conical stator (2), characterized by: the section molded line at the inlet end face (I-I) of the conical rotor (1) is a circle with the radius of R and the eccentricity of E, and the section molded line at the outlet end face (III-III) of the conical rotor (1) is a circle with the radius of R and the eccentricity of E;

the section molded line at the inlet end face (I-I) of the conical stator (2) is formed by sequentially connecting 4 sections of curves, namely a first arc ABC, a first straight line section CD, a second arc DEF and a second straight line section FA, wherein the radiuses of the two arcs are R, the length of the straight line section is 4E, the section molded line at the outlet end face (III-III) of the conical stator (2) is formed by sequentially connecting 4 sections of curves, namely a third arc ABC, a third straight line section CD, a fourth arc DEF and a fourth straight line section FA, the radiuses of the two arcs are R, and the length of the straight line section is 4E;

the conical rotor (1) and the conical stator (2) are linearly and conically reduced from an inlet end face (I-I) to an outlet end face (III-III) by taking a geometric center of a section as a base point, and meet the requirements that R is alpha R, E is alpha E, and alpha is less than 1 and is a section scaling coefficient;

the rotary type conical rotor and the rotary type conical stator are characterized in that the conical rotor (1) and the conical stator (2) make a moving point planetary rotary motion with a variable motion rule, the revolution and rotation angular speeds of the rotor on all sections are equal, the revolution and rotation radiuses are sequentially and linearly reduced from an inlet end face (I-I) to an outlet end face (III-III), the rotor and the stator can be completely and correctly meshed at different section positions, a closed working cavity with continuously changed volume is formed from the inlet end face (I-I) to the outlet end face (III-III), and the volume of the formed closed working cavity is gradually reduced.

2. The rotor and the stator of the conical single-screw gas-liquid mixture pump as claimed in claim 1, wherein: the angle of spiral development tau of the conical rotor (1) from the inlet end face (I-I) to the outlet end face (III-III)₁Continuously changing from 0 to 3 pi: at the inlet end face (I-I), the helix angle of development tau₁0, at the intermediate axial section (II-II), the helix spread angle tau₁1.5 pi, at the outlet end face (III-III), the helix spread angle tau₁3 pi, with spiral spread angle tau₁From 0 to 3 pi, the tooth profile curve equation of the cone center rotor (1) is as follows:

in the formula, P₁(τ₁) And H is the pitch and height, tau, of the conical rotor (1), respectively₀Is an angle parameter, 0 is more than or equal to tau₀≤2π；

The angle of spiral development tau of the conical stator (2) from the inlet end face (I-I) to the outlet end face (III-III)₂Continuously changing from 0 to 1.5 pi: at the inlet end face (I-I), the helix angle of development tau₂0, at the intermediate axial section (II-II), the helix spread angle tau₂0.75 pi, at the outlet end face (III-III), the helix spread angle tau₂1.5 pi, with helix development angle tau₂From 0 to 1.5 pi, the tooth profile curve equation of the circular arc section of the conical stator (2) is as follows:

in the formula, τ₃As the parameters of the angle, the angle is,

The tooth profile curve equation of the straight line section of the conical stator (2) is as follows:

in the formula, τ₄Is an angle parameter, 0 is more than or equal to tau₄≤π。

3. The rotor and the stator of the conical single-screw gas-liquid mixture pump as claimed in claim 1, wherein: helix L of conical rotor (1)₁Generating circle O with radius changed₁Development of a counterclockwise helical line, helix L₁The equation of (a) is:

taper shapeHelical line L of stator (2)₂Generating circle O with radius changed₂Development of a counterclockwise helical line, helix L₂The equation of (a) is:

4. a conical single-screw gas-liquid mixed delivery pump is characterized in that: use of a conical rotor (1) and a conical stator (2) according to claim 1.

Technical Field

The invention relates to a single-screw pump, in particular to a conical single-screw pump, and particularly relates to a rotor and a stator of a conical single-screw gas-liquid mixed transportation pump.

Background

The single screw pump is a positive displacement rotor pump, has the characteristics of strong working medium adaptability, stable flow and convenient maintenance, and is widely applied to the fields of agriculture, petroleum, chemical industry and food. The primary working components of a single screw pump are a pair of intermeshing screw rotors and stators. The characteristics of the screw rotors determine the performance of a single screw pump. Under the drive of an external power source, the two are spirally in interference fit to form a continuous sealed cavity, so that the transmission process of the medium is realized. The variation in cross-section and pitch of a single screw pump directly determines the characteristics of the screw rotor.

Chinese patent, publication No. CN2037782U proposes a conical single-screw pump; the method is characterized in that: three forming modes of the conical single-screw pump are provided, namely the diameter change of a rotor forming circle, the eccentricity change of the rotor forming circle and the simultaneous change of the diameter change and the eccentricity change. Different meshing modes between the rotor and the stator can be realized by adjusting the working clearance between the rotor of the conical screw and the stator of the bushing, the application range and the service life of the single screw are enlarged, but no specific tooth-shaped curve equation is given, and the screw is difficult to form, process and manufacture.

Disclosure of Invention

The invention provides a rotor and a stator of a conical single-screw gas-liquid mixed delivery pump, which aim to improve the internal volume ratio of a single-screw pump to the maximum extent, further improve the outlet pressure of the single-screw pump and improve the inlet flow of the single-screw pump. According to the invention, the conical rotor (1) and the conical stator (2) are linearly and conically reduced from the inlet end face (I-I) to the outlet end face (III-III) by taking the geometric center of the section as a basic point, and the sections can be completely and correctly meshed; under the condition that the gas-liquid ratio is increased, the formation of a gas plug can still be effectively avoided, and the transportation efficiency is higher. Under the same equivalent size, the suction end has larger volume, the discharge end has larger pressure, and the application range and the application field are wider; under the same outlet and inlet parameters, the axial length of the screw is greatly reduced, the frictional wear and the leakage are correspondingly reduced, the service life of the screw is longer, and the screw has important significance for improving the comprehensive performance of the single-screw pump.

In order to achieve the purpose, the invention adopts the following technical scheme:

a rotor and a stator of a conical single-screw gas-liquid mixed transmission pump comprise: the conical rotor comprises a conical rotor (1) and a conical stator (2), wherein the section molded line at the inlet end face (I-I) of the conical rotor (1) is a circle with the radius of R and the eccentricity of E, and the section molded line at the outlet end face (III-III) of the conical rotor (1) is a circle with the radius of R and the eccentricity of E;

the section molded line at the inlet end face (I-I) of the conical stator (2) is formed by sequentially connecting 4 sections of curves, namely a first arc ABC, a first straight line section CD, a second arc DEF and a second straight line section FA, wherein the radiuses of the two arcs are R, the length of the straight line section is 4E, the section molded line at the outlet end face (III-III) of the conical stator (2) is formed by sequentially connecting 4 sections of curves, namely a third arc ABC, a third straight line section CD, a fourth arc DEF and a fourth straight line section FA, the radiuses of the two arcs are R, and the length of the straight line section is 4E;

the conical rotor (1) and the conical stator (2) are arranged from the inlet end face (I-I) to the outlet end face (III-III), the section profile line radius and the eccentricity are linearly and conically reduced by taking the geometric center of the section as a base point, and the requirements that R is alpha R, E is alpha E, and alpha is less than 1 and is a section scaling coefficient are met;

the conical rotor (1) and the conical stator (2) do variable motion law moving point planetary rotation motion, the revolution and rotation angular velocities of the rotor on each section are equal, the revolution and rotation radiuses are sequentially and linearly reduced from the inlet end face (I-I) to the outlet end face (III-III), the rotor and the stator can be completely and correctly meshed at different section positions, a closed working cavity with continuously changed volume is formed from the inlet end face (I-I) to the outlet end face (III-III), and the volume of the formed closed working cavity is gradually reduced.

A rotor and a stator of a conical single-screw gas-liquid mixed delivery pump are characterized in that a spiral expansion angle tau of a conical rotor (1) is from an inlet end face (I-I) to an outlet end face (III-III)₁Continuously changing from 0 to 3 pi: at the inlet end face (I-I), the helix angle of development tau₁0, at the intermediate axial section (II-II), the helix spread angle tau₁1.5 pi, at the outlet end face (III-III), the helix spread angle tau₁3 pi, with spiral spread angle tau₁From 0 to 3 pi, cone center rotatingThe tooth profile curve equation of the son (1) is as follows:

in the formula, P₁(τ₁) And H is the pitch and height, tau, of the conical rotor (1), respectively₀Is an angle parameter, 0 is more than or equal to tau₀≤2π；

The angle of spiral development tau of the conical stator (2) from the inlet end face (I-I) to the outlet end face (III-III)₂Continuously changing from 0 to 1.5 pi: at the inlet end face (I-I), the helix angle of development tau₂0, at the intermediate axial section (II-II), the helix spread angle tau₂0.75 pi, at the outlet end face (III-III), the helix spread angle tau₂1.5 pi, with helix development angle tau₂From 0 to 1.5 pi, the tooth profile curve equation of the circular arc section of the conical stator (2) is as follows:

in the formula, τ₃As the parameters of the angle, the angle is,P₂(τ₂) Is the pitch of the conical stator (2) and satisfies P₂(τ₂)＝2P₁(τ₁)；

The tooth profile curve equation of the straight line section of the conical stator (2) is as follows:

in the formula, τ₄Is an angle parameter, 0 is more than or equal to tau₄≤π；

Rotor and stator of conical single-screw gas-liquid mixed delivery pump, spiral line L of conical rotor (1)₁Generating circle O with radius changed₁Development of a counterclockwise helical line, helix L₁The equation of (a) is:

helix L of conical stator (2)₂Generating circle O with radius changed₂Development of a counterclockwise helical line, helix L₂The equation of (a) is:

the invention has the beneficial effects that:

compared with the existing conical single-screw gas-liquid mixed delivery pump, the internal volume ratio is obviously increased under the same structural parameters, the outlet pressure is higher, and the application range of the conical single-screw gas-liquid mixed delivery pump is expanded;

the tapered single-screw gas-liquid mixed transportation pump with the variable motion law can still effectively avoid forming a gas plug under the condition that the gas-liquid ratio is increased, so that the normal work of the gas-liquid mixed transportation pump is ensured;

the length of the screw rotor and the stator determines the change mode of the screw pitch, which is beneficial to the design and processing of the screw rotor;

the axial size of the screw is greatly reduced under the same outlet and inlet parameters, the structure is more compact, the friction and leakage channels between the rotor and the stator are reduced, and the service life of the screw pump is longer;

through adjusting the working clearance between the conical screw rotor and the lining stator, different meshing modes between the rotor and the stator can be realized, and the application field is wider.

Drawings

Fig. 1 is a two-dimensional view of a conical rotor (1).

FIG. 2 is a cross-sectional line drawing of the conical rotor (1) at the inlet end face (I-I).

FIG. 3 is a cross-sectional line drawing of the conical rotor (1) at the outlet end face (III-III).

Fig. 4 is a two-dimensional cross-sectional view of the conical stator (2).

Fig. 5 is a cross-sectional line drawing at the inlet end face (i-i) of the conical stator (2).

FIG. 6 is a sectional profile view of the conical stator (2) at the outlet end face (III-III).

Fig. 7 is a meshing view of the rotor section profile and the stator section profile at the inlet end face (i-i).

Fig. 8 is a meshing diagram of the rotor section profile and the stator section profile at the middle axial section (ii-ii).

Fig. 9 is a meshing diagram of the rotor section profile and the stator section profile at the outlet end face (iii-iii).

Fig. 10 is an assembly view of the conical rotor (1) within the conical stator (2).

In the figure: 1-a conical rotor; 2-a conical stator; l is₁-the helix of the conical rotor (1); l is₂-the helix of the conical stator (2); r is the arc radius of the section molded lines at the inlet end faces (I-I) of the conical rotor (1) and the conical stator (2); e, eccentricity of a section profile at the inlet end face (I-I) of the conical rotor (1); r is the arc radius of the section molded lines at the outlet end faces (III-III) of the conical rotor (1) and the conical stator (2); e, eccentricity of a section profile at the outlet end face (III-III) of the conical rotor (1); h-height of the conical rotor (1); point O₁、O₂-the geometric centre point and the centre point of revolution of the cross-sectional profile of the conical rotor (1), respectively; and the axis of the two rotation central points is respectively the rotation central line of the screw rotor and the rotation central line of the stator.

Detailed Description

The invention is further described with reference to the following figures and examples.

As shown in fig. 1, the two-dimensional diagram of the conical rotor (1) is shown, the conical rotor (1) is from an inlet end face (i-i) to an outlet end face (iii-iii), the section profile line radius and the eccentricity are linearly and conically reduced by taking the section geometric center as a base point, and the requirements that R is alpha R, E is alpha E, and alpha < 1 is a section scaling coefficient are met. The outer convex surface of the conical rotor (1) is a conical helical surface, and the conical rotor is generated by rotating a continuously linearly reduced section molded line around the central line of the conical rotor from an inlet end surface (I-I) to an outlet end surface (III-III) and moving forwards according to a screw pitch.

With helix spread angle tau₁The tooth profile curve equation of the conical rotor (1) is continuously changed from 0 to 3 pi:

in the formula, P₁(τ₁) And H is the pitch and height, tau, of the conical rotor (1), respectively₀Is an angle parameter, 0 is more than or equal to tau₀≤2π；

Helix L of conical rotor (1)₁Generating circle O with radius changed₁Development of a counterclockwise helical line, helix L₁The equation of (a) is:

as shown in fig. 2, the sectional line diagram of the inlet end face (i-i) of the conical rotor (1) is a circle with radius R and eccentricity E;

as shown in fig. 3, the sectional profile of the conical rotor (1) at the outlet end face (iii-iii) is a line graph, the sectional profile of the conical rotor (1) at the outlet end face (iii-iii) is a circle with radius r and eccentricity e;

as shown in fig. 4, which is a two-dimensional cross-sectional view of the conical stator (2), the conical stator (2) is linearly tapered from the inlet end face (i-i) to the outlet end face (iii-iii), both the section profile radius and the eccentricity are reduced by taking the section geometric center as a base point, and R ═ α R, E ═ α E, α < 1 are section scaling coefficients;

with helix spread angle tau₂The tooth profile curve equation of the circular arc section of the conical stator (2) is continuously changed from 0 to 1.5 pi:

in the formula, τ₃As the parameters of the angle, the angle is,

P₂(τ₂) Is the pitch of the conical stator (2) and satisfies P₂(τ₂)＝2P₁(τ₁)；

The tooth profile curve equation of the straight line section of the conical stator (2) is as follows:

in the formula, τ₄Is an angle parameter, 0 is more than or equal to tau₄≤π；

Helix L of conical stator (2)₂Generating circle O with radius changed₂Development of a counterclockwise helical line, helix L₂The equation of (a) is:

as shown in fig. 5, the sectional line diagram is a sectional line diagram at the inlet end face (i-i) of the conical stator (2), the sectional line at the inlet end face (i-i) of the conical stator (2) is formed by sequentially connecting 4 sections of curves, which sequentially include a first arc ABC, a first straight line section CD, a second arc DEF and a second straight line section FA, wherein the radii of the two arcs are R, and the length of the straight line section is 4E;

as shown in fig. 6, the sectional line diagram is a sectional line diagram at the outlet end face (iii-iii) of the conical stator (2), the sectional line at the outlet end face (iii-iii) of the conical stator (2) is formed by sequentially connecting 4 sections of curves, which sequentially include a third arc abc, a third straight-line section cd, a fourth arc def and a fourth straight-line section fa, the radii of the two arcs are r, and the lengths of the straight-line sections are 4 e;

as shown in FIG. 7, FIG. 8 and FIG. 9, the meshing diagrams of the rotor section molded line and the stator section molded line at the inlet end face (I-I), the meshing diagram of the rotor section molded line and the stator section molded line at the intermediate axial section (II-II) and the meshing diagram of the rotor section molded line and the stator section molded line at the outlet end face (III-III) are respectively shown, and the spiral spread angle of the conical rotor (1) is measured from the inlet end face (I-I) to the outlet end face (III-III)τ₁Continuously varying from 0 to 3 pi, at the inlet end face (I-I), the helix angle of development tau₁0, at the intermediate axial section (II-II), the helix spread angle tau₁1.5 pi, at the outlet end face (III-III), the helix spread angle tau₁3 pi; the angle of spiral development tau of the conical stator (2) from the inlet end face (I-I) to the outlet end face (III-III)₂Continuously varying from 0 to 1.5 pi, at the inlet end face (I-I), the helix development angle tau₂0, at the intermediate axial section (II-II), the helix spread angle tau₂0.75 pi, at the outlet end face (III-III), the helix spread angle tau₂1.5 pi, with a helical development angle tau of the conical rotor (1)₁The spiral spread angle tau of the conical stator (2) is from 0 to 4 pi₂The section profile radius and the eccentricity are linearly and conically reduced by taking the geometric center of the section profile radius and the eccentricity as a base point, and the conical rotor (1) and the conical stator (2) can be correctly meshed with each other.

As shown in fig. 10, the assembly drawing of the conical rotor (1) in the conical stator (2) is shown, which comprises the conical rotor (1) and the conical stator (2), under the fixed-point planetary rotation motion, a closed working chamber with continuously variable volume is formed between the conical rotor (1) and the conical stator (2), and the volume of the closed working chamber is gradually reduced from the inlet end face (i-i) to the outlet end face (iii-iii).

Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive efforts by those skilled in the art based on the technical solution of the present invention.