Rotary piston mechanism

Abstract

The present invention applies the law of rotary piston motion, constructs the inner and outer figure-8 trajectory line geometry structure through three equidistant circle geometry structure, and constructs the inner and outer figure-shaped trajectory line geometry structure through four equidistant circle geometry structure to form a rotary piston component, and forms the kinematic pair elements through the geometric relationship of the two components being always tangent and the characteristics of direct physical contact, and forms the mechanical principle of force transmission, motion form and motion speed conversion between components, enriches the connotation and extension of the rotary piston motion law, rotary piston kinematic pair and rotary piston mechanism in the knowledge system of plane geometry principle and mechanical principle, and lays the necessary underlying technical foundation for the design and development of rotary piston rotating machinery and thermal machinery. The present invention uses the rotary piston mechanism to design an 8-shaped rotary piston displacement pump as a specific embodiment, and compares it with the existing rotary piston technology Kurli rotor fluid motor comparative example.

Description

Technical Field

[0001] The present invention relates to a rotary piston mechanical principle which applies the motion law of a rotary piston, constructs an inner and outer figure-8 trajectory line geometric structure by three equidistant circle geometric structures, constructs an inner and outer figure-T trajectory line geometric structure by four equidistant circle geometric structures to form a rotary piston component, forms a rotary piston kinematic pair and twelve known rotary piston mechanisms through a kinematic pair element formed by a geometric relationship in which two components are always tangent and a feature of direct physical contact, and realizes force transmission between components, conversion of motion form and motion speed, and is applied to the design and development of rotary piston rotation and thermal machinery. Background Art

[0002] After a thorough study of the existing rotary piston technology, a problem will be discovered and a conclusion will be drawn that the existing rotary piston rotation and thermal machinery is not composed of a rotary piston mechanism. The Cooley rotor fluid motor (J.F. COOLEY) is modeled based on its patent literature as a comparison for the present invention. Fig.18 shown.

[0003] In the Cooley rotor fluid motor, the inner rotor is composed of the 8-shaped rotary piston (53), the shaft (54) and the external gear (55, 56), and the outer rotor is composed of the side plates (66, 67), the cylinder (72) and the radial seal (73, 74, 75). The inner and outer rotors are meshed through the external gear (55, 56) and the inner gear ring (70, 71) on the side plates (66, 67) to form a planetary gear mechanism without planetary gears, so as to realize the rotary piston motion in which the inner and outer rotors rotate synchronously in the same direction at a rate of 3:2 along their respective geometric centers, forming the technical basis of the existing rotary piston.

[0004] By observing the inner and outer rotors of the Cooley rotor fluid motor from the perspective of mechanical principles, it is found that there is relative motion but no direct physical contact and no moving elements between the inner rotor 8-shaped rotating piston (53) and the outer rotor cylinder (72); there is relative motion and direct physical contact between the inner rotor 8-shaped rotating piston (53) and the outer rotor radial seal (73, 74, 75), but the existence or non-existence of the outer rotor radial seal (73, 74, 75) has no relationship or direct influence on the motion of the inner rotor 8-shaped rotating piston (53); the 3:2 rate synchronous rotating piston motion between the inner and outer rotors of the Cooley rotor fluid motor can ultimately be simplified to the planetary gear motion between the outer gear (55, 56) and the inner gear ring (70, 71), which has no direct relationship with the geometric structure of the inner and outer rotors. Therefore, the mechanical principle of the Cooley rotor fluid motor is identified as a planetary gear mechanism.

[0005] The inner and outer rotors of the Cooley rotor fluid motor only have the characteristics of rotary piston motion, which does not conform to the definitions of relevant components, kinematic pairs and mechanisms in mechanical principles. It can be inferred that the existing rotary piston machinery using planetary gear mechanisms is not composed of rotary piston mechanisms.

[0006] In the Cooley rotor fluid motor, the characteristic of direct physical contact between the radial seal (73, 74, 75) and the 8-shaped rotating piston (53) forms a sealing structure and a sealing method, which are typical technical features that the existing rotor displacement pumps do not have and cannot be replicated. They are beneficial to forming a good working volume tightness and improving key performance indicators such as equipment volume ratio, pressure application range, working efficiency and energy consumption level. Summary of the invention

[0007] The invention originates from the accidental discovery of the law of rotary piston motion in basic geometric principles, such as Figure 1 , Figure 2 shown.

[0008] exist Figure 1 In the invention, the three equidistant lines (1-2, 1-3, 1-4) intersect at a point (1) at an angle of 120°. The geometric structure center point (1) of the three equidistant line endpoints (2, 3, 4) revolves at a rate of 3:1 and rotates synchronously in the same direction on a circle (Oa) with an eccentric distance e at the center (O). The motion trajectories of the three equidistant line endpoints (2, 3, 4) form an 8-shaped trajectory line (5). The two interrelated geometric structures, the three equidistant line endpoints (2, 3, 4) and the 8-shaped trajectory line (5), always maintain the characteristics of overlapping geometric relationship and direct physical contact in the rotating piston motion law formed by locking the geometric structure or locking the center (1, O) of the geometric structure. Under the action of the force generated by the axiom that three non-collinear points determine a surface based on the basic geometric principle, the force transmission, motion form and motion speed conversion between the two geometric structures are realized.

[0009] exist Figure 2 In the invention, the four equidistant lines (1-5, 1-7, 1-8, 1-9) intersect at 90 degrees at point (1), the geometric structure center point (1) of the four equidistant line endpoints (6, 7, 8, 9) revolves at a rate of 4:1 and rotates synchronously in the same direction on a circle (Oa) with an eccentric distance e at the center (O), and the motion trajectories of the four equidistant line endpoints (6, 7, 8, 9) form a herringbone trajectory line (10). The two interrelated geometric structures, the four equidistant line endpoints (6, 7, 8, 9) and the herringbone trajectory line (10), always maintain a coincident geometric relationship and direct physical contact characteristics in the law of rotary piston motion formed when the geometric structure is locked or the center (1, O) of the geometric structure is locked, and the force generated by the axiom that three non-collinear points determine a surface is followed and the force transmission, motion form and motion speed conversion between the two geometric structures are realized.

[0010] The geometric relationship of always coinciding between the three equidistant line endpoints (2, 3, 4) and the figure-8 trajectory line (5), the four equidistant line endpoints (6, 7, 8, 9) and the figure-T trajectory line (10) in the law of rotary piston motion, and the characteristics of direct physical contact provide technical principles and methods for constructing a rotary piston motion pair to form a rotary piston mechanism and realize the mechanical principle of force transmission between components, motion form and motion speed conversion.

[0011] exist Figure 3 In the invention, three equidistant lines (1-2, 1-3, 1-4) intersect at a point (1) at an angle of 120 degrees to each other, three equidistant circles (2a, 3a, 4a) with the endpoints (2, 3, 4) of the three equidistant lines as the center and diameter d, the center (1) of the geometric structure of the three equidistant circles (2a, 3a, 4a) revolves at a rate of 3:1 on a circle (Oa) with an eccentricity e at the center (O) and a radius e, and the motion trajectories of the three equidistant circles (2a, 3a, 4a) form an 8-shaped circular ring array, and the inner and outer tangent points of the 8-shaped circular ring array form the inner and outer 8-shaped trajectory lines (11, 12) geometric structure. The geometric structure of three equidistant circles (2a, 3a, 4a) and the geometric structure of inner and outer 8-shaped trajectory lines (11, 12) constitute a rotary piston component. In the rotary piston movement formed by locking the component or locking the geometric center (1, O) of the component, the kinematic pair elements formed by always maintaining a tangent geometric relationship and the characteristics of direct physical contact constitute a rotary piston kinematic pair, following the rotary piston mechanical principle that the force generated by the axiom that three non-collinear points determine a surface is achieved between the components to achieve force transmission, motion form and motion speed conversion.

[0012] When the centers (2, 3, 4) of the three equidistant circular components (2a, 3a, 4a) are locked, the three equidistant circular components (2a, 3a, 4a) and the inner figure-8 trajectory component (11) form a rotary piston motion pair, and the inner figure-8 trajectory component (11) moves one circle, driving the three equidistant circles (2a, 3a, 4a) to rotate along the centers (2, 3, 4), while the geometric center (O) of the inner figure-8 trajectory component (11) synchronously revolves twice in the opposite direction, wherein the inner figure-8 trajectory component (11) moves one circle. The center circle (Ob) of the inner 8-shaped trajectory line component (11) and the coaxially mounted circular component (Oc) convert the revolution motion of the geometric center (O) of the inner 8-shaped trajectory line component (11) into the synchronous rotation motion of the circular component (Oc) along the eccentric point (1) by locking the eccentric point (1) of the circular component (Oc). The inner 8-shaped trajectory line component (11), the three equidistant circular components (2a, 3a, 4a) and the circular component (Oc) form an 8-shaped rotary piston mechanism. Figure 4 shown.

[0013] When the outer 8-shaped trajectory line component (12) is locked, the three equidistant circular components (2a, 3a, 4a) and the outer 8-shaped trajectory line component (12) form a rotary piston motion pair, and the three equidistant circular components (2a, 3a, 4a) move one circle to drive the three equidistant circles (2a, 3a, 4a) to rotate along the center of the circle (2, 3, 4). At the same time, the geometric center (1) of the three equidistant circular components (2a, 3a, 4a) revolves three circles in the same direction synchronously, wherein the three equidistant circular components (2a , 3a, 4a) and a coaxially mounted circular member (1b), the revolution motion of the geometric center (1) of the three equidistant circular members (2a, 3a, 4a) is converted into the synchronous rotation motion of the circular member (1b) along the eccentric point (O) by locking the eccentric point (O) of the circular member (1b), and the three equidistant circular members (2a, 3a, 4a), the outer 8-shaped trajectory line member (12) and the circular member (1b) form a triangular rotary piston mechanism as shown in FIG. Figure 5 shown.

[0014] When the geometric center (1) of the three equidistant circular components (2a, 3a, 4a) and the geometric center (O) of the inner figure-8 trajectory component (11) are locked simultaneously, the three equidistant circular components (2a, 3a, 4a) and the inner figure-8 trajectory component (11) form a rotary piston motion pair, and the inner figure-8 trajectory component (11) rotates three times along the geometric center (O), driving the three equidistant circles (2a, 3a, 4a) to rotate along the center (2, 3, 4) while driving the three equidistant circular components (2a, 3a, 4a) to rotate synchronously in the same direction for two times along the geometric center (1), and the inner figure-8 trajectory component (11) and the three equidistant circular components (2a, 3a, 4a) form an 8-shaped rotary piston mechanism. Figure 6 As shown, it serves as the design basis for the 8-shaped rotary piston positive displacement pump in a specific embodiment of the present invention.

[0015] When the geometric center (1) of the three equidistant circular components (2a, 3a, 4a) and the geometric center (O) of the outer figure-eight trajectory component (12) are locked simultaneously, the three equidistant circular components (2a, 3a, 4a) and the outer figure-eight trajectory component (12) form a rotary piston motion pair, and the three equidistant circular components (2a, 3a, 4a) rotate twice along the geometric center (1), driving the three equidistant circles (2a, 3a, 4a) to rotate along the center (2, 3, 4) while driving the outer figure-eight trajectory component (12) to rotate three times in the same direction along the geometric center (O) synchronously, and the outer figure-eight trajectory component (12) and the three equidistant circular components (2a, 3a, 4a) form a triangular rotary piston mechanism. Figure 7 shown.

[0016] When the inner 8-shaped trajectory line component (11) is locked, the three equidistant circular components (2a, 3a, 4a) and the inner 8-shaped trajectory line component (11) form a rotary piston motion pair, and the three equidistant circular components (2a, 3a, 4a) move one circle to drive the three equidistant circles (2a, 3a, 4a) to rotate along the center of the circle (2, 3, 4). At the same time, the geometric center (1) of the three equidistant circular components (2a, 3a, 4a) revolves three circles in the same direction synchronously, wherein the three equidistant circular components (2a , 3a, 4a) and a coaxially mounted circular member (1b), by locking the eccentric point (O) of the circular member (1b), the revolution motion of the geometric center (1) of the three equidistant circular members (2a, 3a, 4a) is converted into the synchronous rotation motion of the circular member (1b) along the eccentric point (O), and the three equidistant circular members (2a, 3a, 4a), the inner 8-shaped trajectory line member (11) and the circular member (1b) form an 8-shaped rotary piston mechanism as shown in FIG. Figure 8 shown.

[0017] When the centers (2, 3, 4) of the three equidistant circular components (2a, 3a, 4a) are locked, the three equidistant circular components (2a, 3a, 4a) and the outer figure-8 trajectory component (12) form a rotary piston motion pair, and the outer figure-8 trajectory component (12) moves one circle to drive the three equidistant circles (2a, 3a, 4a) to rotate along the centers (2, 3, 4), while the geometric center (O) of the outer figure-8 trajectory component (12) synchronously revolves twice in the opposite direction, wherein the outer figure-8 trajectory component (12) rotates one circle. The center circle (Ob) of the 8-shaped trajectory line component (12) and the coaxially mounted circular component (Oc) convert the revolution motion of the geometric center (O) of the outer 8-shaped trajectory line component (12) into the synchronous rotation motion of the circular component (Oc) along the eccentric point (1) by locking the eccentric point (1) of the circular component (Oc). The outer 8-shaped trajectory line component (12), the three equidistant circular components (2a, 3a, 4a) and the circular component (Oc) form an 8-shaped rotary piston mechanism. Fig. 9 shown.

[0018] exist Fig.10In the invention, four equidistant lines (1-6, 1-7, 1-8, 1-9) intersect at 90° to each other at point (1), four equidistant circles (6a, 7a, 8a, 9a) with the four equidistant line endpoints (6, 7, 8, 9) as the center and diameter d, the center (1) of the geometric structure of the four equidistant circles (6a, 7a, 8a, 9a) revolves at a rate of 4:1 on a circle (Oa) with an eccentricity e at the center (O) and a radius e, and the motion trajectories of the four equidistant circles (6a, 7a, 8a, 9a) form a herringbone array, and the inner and outer tangent points of the herringbone array form the inner and outer herringbone trajectory lines (13, 14) geometric structure. The geometric structure of four equidistant circles (6a, 7a, 8a, 9a) and the geometric structure of the inner and outer zigzag trajectory lines (13, 14) constitute a rotary piston component. When the locking component or the locking component geometric center (1, O) is combined to form a rotary piston motion, the kinematic pair elements formed by always maintaining a tangent geometric relationship and the characteristics of direct physical contact constitute a rotary piston motion pair, and follow the rotary piston mechanical principle that the force generated by the axiom that three non-collinear points determine a surface is achieved between the components to achieve force transmission, motion form and motion speed conversion, such as Fig.11 , Fig.12 , Fig.13 , Fig.14 , Fig.15 , Fig.16 shown.

[0019] When the centers (6, 7, 8, 9) of the four equidistant circular components (6a, 7a, 8a, 9a) are locked, the four equidistant circular components (6a, 7a, 8a, 9a) and the inner U-shaped trajectory component (13) form a rotary piston motion pair, and the inner U-shaped trajectory component (13) moves one circle to drive the four equidistant circles (6a, 7a, 8a, 9a) to rotate along the centers (6, 7, 8, 9), while the geometric center (O) of the inner U-shaped trajectory component (13) synchronously revolves three circles in the opposite direction. , wherein the center circle (Ob) of the inner zigzag trajectory line component (13) and the coaxially mounted circular component (Oc) convert the revolution motion of the geometric center (O) of the inner zigzag trajectory line component (13) into the synchronous rotation motion of the circular component (Oc) along the eccentric point (1) by locking the eccentric point (1) of the circular component (Oc), and the inner zigzag trajectory line component (13), four equidistant circular components (6a, 7a, 8a, 9a) and the circular component (Oc) form a zigzag rotary piston mechanism as shown in Fig.11 shown.

[0020] When the outer zigzag trajectory line component (14) is locked, the four equidistant circular components (6a, 7a, 8a, 9a) and the outer zigzag trajectory line component (14) form a rotary piston motion pair, and the four equidistant circular components (6a, 7a, 8a, 9a) move one circle to drive the four equidistant circles (6a, 7a, 8a, 9a) to rotate along the center of the circle (6, 7, 8, 9), while the geometric center (1) of the four equidistant circular components (6a, 7a, 8a, 9a) revolves four times in the same direction synchronously, wherein the four equidistant circular components The center circle (1a) of the four equidistant circular members (6a, 7a, 8a, 9a) and the coaxially mounted circular member (1b) are used to convert the revolution motion of the geometric center (1) of the four equidistant circular members (6a, 7a, 8a, 9a) into the synchronous rotation motion of the circular member (1b) along the eccentric point (O) by locking the eccentric point (O) of the circular member (1b). The four equidistant circular members (6a, 7a, 8a, 9a), the outer zigzag trajectory line member (14) and the circular member (1b) form a square rotary piston mechanism as shown in FIG. Fig.12 shown.

[0021] When the geometric center (1) of the four equidistant circular components (6a, 7a, 8a, 9a) and the geometric center (O) of the inner zigzag trajectory component (13) are locked simultaneously, the four equidistant circular components (6a, 7a, 8a, 9a) and the inner zigzag trajectory component (13) form a rotary piston motion pair, the inner zigzag trajectory component (13) rotates four times along the geometric center (O), driving the four equidistant circles (6a, 7a, 8a, 9a) to rotate along the center of the circle (6, 7, 8, 9), while driving the four equidistant circular components (6a, 7a, 8a, 9a) to rotate three times in the same direction along the geometric center (1), the inner zigzag trajectory component (13) and the four equidistant circular components (6a, 7a, 8a, 9a) forming a zigzag rotary piston mechanism. Fig.13 shown.

[0022] When the geometric center (1) of the four equidistant circular components (6a, 7a, 8a, 9a) and the geometric center (O) of the outer zigzag trajectory line component (14) are locked simultaneously, the four equidistant circular components (6a, 7a, 8a, 9a) and the outer zigzag trajectory line component (14) form a rotary piston motion pair, and the four equidistant circular components (6a, 7a, 8a, 9a) rotate three times along the geometric center (1), driving the four equidistant circles (6a, 7a, 8a, 9a) to rotate along the center of the circle (6, 7, 8, 9), while driving the outer zigzag trajectory line component (14) to rotate four times in the same direction along the geometric center (O), and the outer zigzag trajectory line component (14) and the four equidistant circular components (6a, 7a, 8a, 9a) to form a square rotary piston mechanism. Fig.14 shown.

[0023] When the inner zigzag trajectory line component (13) is locked, the four equidistant circular components (6a, 7a, 8a, 9a) and the zigzag trajectory line component (13) form a rotary piston motion pair, and the four equidistant circular components (6a, 7a, 8a, 9a) move one circle to drive the four equidistant circles (6a, 7a, 8a, 9a) to rotate along the center of the circle (6, 7, 8, 9), while the geometric center (1) of the four equidistant circular components (6a, 7a, 8a, 9a) revolves four times in the same direction synchronously, wherein the four equidistant circular components The center circle (1a) of the four equidistant circular components (6a, 7a, 8a, 9a) and the coaxially mounted circular component (1b) are used to convert the revolution motion of the geometric center (1) of the four equidistant circular components (6a, 7a, 8a, 9a) into the synchronous rotation motion of the component circle (1b) along the eccentric point (O) by locking the eccentric point (O) of the circular component (1b). The four equidistant circular components (6a, 7a, 8a, 9a), the herringbone trajectory line component (13) and the circular component (1b) form a herringbone rotary piston mechanism. Fig.15 shown.

[0024] When the centers (6, 7, 8, 9) of the four equidistant circular components (6a, 7a, 8a, 9a) are locked, the four equidistant circular components (6a, 7a, 8a, 9a) and the outer zigzag trajectory component (14) form a rotary piston motion pair, and the outer zigzag trajectory component (14) moves one circle to drive the four equidistant circles (6a, 7a, 8a, 9a) to rotate along the centers (6, 7, 8, 9), while the geometric center (O) of the outer zigzag trajectory component (14) synchronously revolves three circles in the opposite direction. , wherein the center circle (Ob) of the outer zigzag trajectory line component (14) and the coaxially mounted circular component (Oc) convert the revolution motion of the geometric center (O) of the outer zigzag trajectory line component (14) into the synchronous rotation motion of the circular component (Oc) along the eccentric point (1) by locking the eccentric point (1) of the circular component (Oc), and the outer zigzag trajectory line component (14), four equidistant circular components (6a, 7a, 8a, 9a) and the circular component (Oc) form a square rotary piston mechanism as shown in Fig.16 shown.

[0025] Advantageous Effects of the Invention

[0026] The present invention constructs an 8-shaped trajectory line (5) by using three equidistant line endpoints (2, 3, 4), constructs a zigzag trajectory line (10) by using four equidistant line endpoints (6, 7, 8, 9), constructs inner and outer 8-shaped trajectory lines (11, 12) by using three equidistant circles (2a, 3a, 4a), and constructs inner and outer zigzag trajectory lines (13, 14) by using four equidistant circles (6a, 7a, 8a, 9a), thereby revealing for the first time the geometric structure association between two geometric structures in the motion of a rotary piston from the perspective of geometric principles.

[0027] The present invention forms a rotary piston component through three equidistant circles (2a, 3a, 4a) and inner and outer 8-shaped trajectory lines (11, 12), and four equidistant circles (6a, 7a, 8a, 9a) and inner and outer zigzag trajectory lines (13, 14). The rotary piston motion pair and twelve known rotary piston mechanisms are formed through the geometric relationship of being always tangent between the two components and the motion pair elements formed by the characteristics of direct physical contact. The rotary piston mechanical principle of achieving force transmission, motion form and motion speed conversion between components under the action of the force generated by the axiom of three non-collinear points determining a surface in the basic geometric principle is followed, and the rotary piston mechanism is innovated, enriching the connotation and extension of the rotary piston motion law, rotary piston component, rotary piston motion pair and rotary piston mechanism in the knowledge system of basic plane geometric principles and mechanical principles, and laying a necessary technical foundation for the design and development of rotary piston rotating machinery and thermal machinery. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a plane geometry principle diagram of three equidistant lines and an 8-shaped trajectory line. In the figure: point O; circle Oa; point 1; point 2; point 3; point 4; 5 8-shaped trajectory line.

[0029] Figure 2 It is a plane geometry principle diagram of four equidistant lines and a herringbone trajectory line. In the figure: point O; circle Oa; point 1; point 6; point 7; point 8; point 9; and herringbone trajectory line 10.

[0030] Figure 3 It is a plane geometry principle diagram of three equidistant circles and inner and outer figure-8 trajectory lines, in the figure: point O; circle Oa; point 1; point 2; circle 2a; point 3; circle 3a; point 4; circle 4a; 11 inner figure-8 trajectory line; 12 outer figure-8 trajectory line.

[0031] Figure 4 This is a diagram of an 8-shaped rotary piston mechanism, in which: point O; circle Ob; circular component Oc; point 1; circle 1a; point 2; point 3; point 4; three equidistant circular components 2a, 3a, and 4a; and the 8-shaped trajectory line component within 11.

[0032] Figure 5 This is a diagram of a triangular rotary piston mechanism, in which: point O; point 1; circle 1a; circular component 1b; point 2; point 3; point 4; three equidistant circular components 2a, 3a, and 4a; and outer figure-8 trajectory line component 12.

[0033] Figure 6 This is a diagram of an 8-shaped rotary piston mechanism, in which: point O; point 1; point 2; point 3; point 4; three equidistant circular components 2a, 3a, and 4a; and an 8-shaped trajectory line component within 11.

[0034] Figure 7It is a diagram of a triangular rotary piston mechanism, in which: point O; point 1; point 2; point 3; point 4; three equidistant circular components 2a, 3a, and 4a; and 12 outer figure-8 trajectory line components.

[0035] Figure 8 1 is a diagram of an 8-shaped rotary piston mechanism, in which: point O; point 1; circle 1a; circle 1b; point 2; point 3; point 4; three equidistant circular components 2a, 3a, and 4a; and an 8-shaped trajectory line component within 11.

[0036] Fig. 9 This is a diagram of a triangular rotary piston mechanism, in which: point O; circle Ob; circular component Oc; point 1; point 2; point 3; point 4; three equidistant circular components 2a, 3a, and 4a; and outer figure-8 trajectory line component 12.

[0037] Fig.10 It is a plane geometry principle diagram of four equidistant circles and inner and outer zigzag trajectory lines, in the figure: point O; circle Oa; point 1; point 6; circle 6a; point 7; circle 7a; point 8; circle 8a; point 9; circle 9a; 13 inner zigzag trajectory line; 14 outer zigzag trajectory line.

[0038] Fig.11 1 is a diagram of a herringbone rotary piston mechanism, in which: point O; circle Ob; circular component Oc; point 1; point 6; point 7; point 8; point 9; four equidistant circular components 6a, 7a, 8a, and 9a; and the herringbone trajectory line component 13.

[0039] Fig.12 1 is a diagram of a square rotary piston mechanism, in which: point O; point 1; circle 1a; circular component 1b; point 6; point 7; point 8; point 9; four equidistant circular components 6a, 7a, 8a, and 9a; and a herringbone trajectory component 14.

[0040] Fig.13 It is a diagram of a herringbone rotary piston mechanism, in which: point O; point 1; point 6; point 7; point 8; point 9; four equidistant circular components 6a, 7a, 8a, and 9a; and a herringbone track line component 13.

[0041] Fig.14 1 is a diagram of a square rotary piston mechanism, in which: point O; point 1; point 6; point 7; point 8; point 9; four equidistant circular components 6a, 7a, 8a, and 9a; and 14 an outer herringbone trajectory line component.

[0042] Fig.15 1 is a diagram of a herringbone rotary piston mechanism, in which: point O; point 1; circle 1a; circular component 1b; point 6; point 7; point 8; point 9; four equidistant circular components 6a, 7a, 8a, and 9a; and a herringbone trajectory line component 13.

[0043] Fig.161 is a diagram of a square rotary piston mechanism, in which: point O; circle Ob; circular component Oc; point 1; point 6; point 7; point 8; point 9; four equidistant circular components 6a, 7a, 8a, and 9a; and a herringbone trajectory component 14.

[0044] Fig.17 1. It is an exploded view of an 8-shaped rotary piston displacement pump, in which: 2a positioning roller; 3a positioning roller; 4a positioning roller; 11 8-shaped rotary piston; 15 shaft; 16 cylinder body; 17 side plate; 18 side plate; 19 bearing; 20 bearing; 21 bearing; 22 bearing; 23 bearing; 24 bearing; 25 radial seal; 26 radial seal; 27 radial seal; 28 axial seal; 29 axial seal; 30 hole; 31 hole; 32 hole; 33 hole; 34 hole; 35 hole; 36 pump body; 37 hole; 38 hole; 39 end cover; 40 end cover; 41 suction semicircular ring groove; 42 discharge semicircular ring groove; 43 suction semicircular ring groove; 44 discharge semicircular ring groove; 45 semicircular ring axial seal; 46 semicircular ring axial seal; 47 bearing; 48 bearing; 49 mechanical seal; 50 inlet; 51 outlet; 52 fastener.

[0045] Fig.18 This is an exploded view of a Cooley rotor fluid motor, in which: 53 an 8-shaped rotary piston; 54 axle; 55 an external gear; 56 an external gear; 57 an end cover; 58 an end cover; 59 a boss; 60 a boss; 61 a hole; 62 a hole; 63 a pump body; 64 an inlet; 65 an outlet; 66 a side plate; 67 a side plate; 68 a hole; 69 a hole; 70 an inner gear ring; 71 an inner gear ring; 72 a cylinder body; 73 a radial seal; 74 a radial seal; 75 a radial seal; 76 a support frame; 77 a support frame; 78 a support frame; 79 a spring; 80 a spring; 81 a spring; 82 an axial seal; 83 an axial seal; 84 a fastener. DETAILED DESCRIPTION Example

[0046] The present invention uses a rotary piston mechanism through a plane geometric principle diagram to design an exemplary specific embodiment of a rotary piston rotary mechanical 8-shaped rotary piston displacement pump, and further illustrates the application of the present invention in engineering in conjunction with the drawings of the specification. The drawings and descriptions are illustrative in nature and are not used to limit the scope of protection of the claims. All technical solutions formed by equivalent substitution or equivalent transformation, as well as subsequent optimization and improvement technical solutions formed based on the principles and methods of the present invention, fall within the scope of protection of the claims of the present invention.

[0047] The specific embodiment of the present invention uses an 8-shaped rotary piston mechanism as shown in FIG. Figure 6 As shown, the plane geometry principle diagram through three equidistant circles and inner and outer figure-8 trajectory lines is as follows Figure 3 The shapes and positions of the geometric structures of points, lines and surfaces shown in the figure are constructed by following the steps below. Fig.17 shown.

[0048] The inner rotor of the 8-shaped rotary piston displacement pump is constructed and installed and positioned. The 8-shaped rotary piston (11) is stretched by the geometric structure of the inner 8-shaped trajectory line (11), and is installed on the shaft (15) through the center hole to form the inner rotor of the 8-shaped rotary piston displacement pump; the two ends of the shaft (15) are installed on the end covers (39, 40) through bearings (47, 48), and the end covers (39, 40) are installed at the axial ends of the pump body (36) through fasteners (52), so that the inner rotor rotates along the geometric center (O) of the 8-shaped rotary piston.

[0049] An 8-shaped rotary piston displacement pump outer rotor is constructed and installed and positioned. The positioning rollers (2a, 3a, 4a) are stretched from the geometric structure of three equidistant circles (2a, 3a, 4a), pass through the side plates (17, 18) along the center of the circle (2, 3, 4), and are installed on the side plates (17, 18) through bearings (19, 20, 21, 22, 23, 24). The side plates (17, 18) are installed at both axial ends of the cylinder body (16) by fasteners (52). The positioning rollers (2a, 3a, 4a), the side plates (17, 18) and the cylinder body (16) form an 8-shaped rotary piston displacement pump outer rotor; the cylindrical surface of the cylinder body (16) is coaxially assembled with the center hole of the pump body (36), so that the outer rotor rotates along the geometric center (1) of the positioning rollers (2a, 3a, 4a).

[0050] Constructing the working volume of the figure-8 rotary piston displacement pump. The figure-8 rotary piston (11) and the positioning rollers (2a, 3a, 4a) form a rotary piston motion pair, and the space enclosed by the side plates (17, 18) and the cylinder body (16) is divided into three independent cylinder chamber working volumes through the characteristics of the always tangent geometric relationship and direct physical contact; the inner rotor figure-8 rotary piston (11) rotates three times, driving the positioning rollers (2a, 3a, 4a) to rotate along the center of the circle (2, 3, 4), while driving the outer rotor to rotate synchronously in the same direction along the geometric center (1) of the positioning rollers (2a, 3a, 4a) for two weeks, and the figure-8 rotary piston (11) rotates three times. The plug (11) completes six rotational in and six rotational out strokes in the working volumes of the three cylinder chambers in sequence; wherein the diameter direction movement clearance between the rotary piston motion pair and the cylinder body (16) is δ1, the axial movement clearance between the 8-shaped rotary piston (11) and the side plates (17, 18) is δ2, the radial movement clearance between the positioning rollers (2a, 3a, 4a) and the side plates (17, 18) is δ3, the axial movement clearance between the side plates (17, 18) and the end covers (39, 40) is δ4, and the radial movement clearance between the shaft and the end cover (39) is δ5.

[0051] Construct the fluid inlet and outlet channels of the figure-eight rotary piston positive-displacement pump. The fluid is connected to the suction semi-circular groove (41) through the inlet (50) of the end cover (39), and is connected to the suction semi-circular groove (43) of the end cover (40) through the hole (38) of the pump body (36). The fluid is connected to the discharge semi-circular groove (42) through the outlet (51) of the end cover (39), and is connected to the discharge semi-circular groove (44) of the end cover (40) through the hole (37) of the pump body (36); the holes (30, 31, 32, 33, 34, 35) on the side plates (17, 18) cooperate with the suction semi-circular grooves (41, 43) and the discharge semi-circular grooves (42, 44) on the end covers (39, 40). When the inner and outer rotors rotate to the starting point of the suction stroke of the working volume of the cylinder chamber, the corresponding holes start to overlap with the suction semi-circular grooves (41, 43), and the fluid inlet (50) conducts the working volume of the cylinder chamber to enter the suction stroke. When the inner and outer rotors rotate to the end point of the suction stroke of the working volume of the cylinder chamber, the corresponding holes start to separate from the suction semi-circular grooves (41, 43), and the channel of the working volume of the cylinder chamber cuts off the end of the suction stroke; when the inner and outer rotors rotate to the starting point of the compression stroke of the working volume of the cylinder chamber, the corresponding holes start to overlap with the discharge semi-circular grooves (42, 44), and the fluid outlet (51) conducts the working volume of the cylinder chamber to enter the compression stroke. When the inner and outer rotors rotate to the end point of the compression stroke of the working volume of the cylinder chamber, the corresponding holes start to separate from the discharge semi-circular grooves (41, 43), and the channel of the working volume of the cylinder chamber cuts off the end of the compression stroke.

[0052] Construct the sealing of the working volume and fluid channels of the figure-eight rotary piston positive-displacement pump. The radial seals (25, 26, 27) are pressure-fitted against the cylindrical surfaces of the positioning rollers (2a, 3a, 4a) through the pressure provided by the packing at the bottom of the U-shaped mounting groove. The radial movement clearance between the sealing and isolating rotary piston moving pairs and the cylinder block (16) is δ1; the radial seals (25, 26, 27) and the U-shaped mounting groove extend into the side plates (17, 18) and are in communication with the radial movement clearance δ3 between the positioning rollers (2a, 3a, 4a) and the side plates (17, 18). The radial movement clearance δ3 between the positioning rollers (2a, 3a, 4a) and the side plates (17, 18) is sealed and isolated by the radial seals (25, 26, 27); the axial seals (28, 29) are pressure-fitted against the two axial surfaces of the figure-eight rotary piston (11) through the pressure provided by the packing at the bottom of the mounting groove, and the axial movement clearance between the figure-eight rotary piston (11) and the side plates (17, 18) is sealed and isolated as δ2; the semi-circular ring axial seals (45, 46) are pressure-fitted against the two axial surfaces of the side plates (17, 18) through the pressure provided by the packing at the bottom of the mounting groove, and the axial movement clearance between the fluid discharge channel between the side plates (17, 18) and the end covers (39, 40) is sealed and isolated as δ4; the mechanical seal (49) is installed in the counterbore of the end cover (39), and the radial movement clearance between the shaft and the end cover (39) is sealed and isolated as δ5. Comparative example

[0053] The present invention is based on the patent document (J.F.COOLEY. Rotary Pluid Motor: American, NO:724,665[P].APR.07,1903.), the attached front view, side view and cross-sectional view and their size ratios, simplifying the complex sealing structure of the fluid channel, and referring to the plane geometric principle diagram of the three equidistant circles and the inner and outer 8-shaped trajectory lines as shown in FIG. Figure 3 The geometric structure shape and position of the points, lines and surfaces shown in the figure are used to remodel the Cooley rotor fluid motor. Fig.18 shown.

[0054] The 8-shaped rotary piston (53) is mounted on the shaft (54) through the center hole, and the external gears (55, 56) are mounted on the axial ends of the 8-shaped rotary piston (53) to form the inner rotor of the Cooley rotor fluid motor. The two ends of the shaft (54) are mounted in the holes (61, 62) of the bosses (59, 60) of the end covers (57, 58), and the end covers (57, 58) are mounted on the axial ends of the pump body (63) through fasteners (84), so that the inner rotor rotates along the center of the holes (61, 62).

[0055] The side plates (66, 67) are mounted at both axial ends of the cylinder body (72) through fasteners (84) to form an outer rotor of the Cooley rotor fluid motor. The holes (68, 69) of the side plates (66, 67) are matched with the cylindrical surfaces of the bosses (59, 60) of the end covers (57, 58) to enable the outer rotor to rotate along the center of the cylindrical surface of the bosses (59, 60).

[0056] The gear ratio of the outer gear (55, 56) and the inner gear ring (70, 71) in the side plate (66, 67) is 2:3, and the inner and outer rotors of the Cooley rotor fluid motor achieve 3:2 speed synchronous rotation in the same direction through the meshing of the outer gear (55, 56) and the inner gear ring (70, 71).

[0057] The radial seals (73, 74, 75) are mounted on the arc surface of the support frame (76, 77, 78), and the springs (79, 80, 81) at the bottom of the support frame (76, 77, 78) provide pressure so that the semicircular ring gaps of the radial seals (73, 74, 75) fit the 8-shaped rotary piston (53), and seal the three working volumes separated by the inner and outer rotors from the radial direction in a direct physical contact manner; the axial seals (82, 83) are mounted in the mounting grooves of the side plates (66, 67), and seal the three working volumes separated by the inner and outer rotors from the axial direction by fitting the two axial end faces of the 8-shaped rotary piston (53).

[0058] The working volumes of the three cylinder chambers of the Cooley rotor fluid motor are connected to the fluid inlet (64) and the fluid outlet (65) on the pump body (63) respectively during the suction stroke and the compression stroke through the radial openings on the cylinder body (72), thereby completing the suction stroke and the compression stroke.

Claims

1. A rotary piston mechanism, comprising a component consisting of a geometric structure of three equidistant circles (2a, 3a, 4a) and an inner and outer figure-eight trajectory line (11, 12), a geometric structure of four equidistant circles (6a, 7a, 8a, 9a) and an inner and outer figure-eight trajectory line (13, 14), characterized in that: When the centers (2, 3, 4) of the three equidistant circular components (2a, 3a, 4a) are locked, the three equidistant circular components (2a, 3a, 4a) and the inner 8-shaped trajectory component (11) form a rotary piston motion pair, and the inner 8-shaped trajectory component (11) moves one circle to drive the three equidistant circles (2a, 3a, 4a) to rotate along the centers (2, 3, 4), while the geometric center (O) of the inner 8-shaped trajectory component (11) synchronously revolves twice in the opposite direction, wherein the center circle (Ob) of the inner 8-shaped trajectory component (11) and the coaxially mounted circular component (Oc) are locked by locking the eccentric point of the circular component (Oc). (1), the revolution motion of the geometric center (O) of the inner figure-8 trajectory line component (11) is converted into the synchronous rotation motion of the circular component (Oc) along the eccentric point (1), and the inner figure-8 trajectory line component (11), the three equidistant circular components (2a, 3a, 4a) and the circular component (Oc) form an 8-shaped rotary piston mechanism; when the outer figure-8 trajectory line component (12) is locked, the three equidistant circular components (2a, 3a, 4a) and the outer figure-8 trajectory line component (12) form a rotary piston motion pair, and the three equidistant circular components (2a, 3a, 4a) move one circle to drive the three equidistant circles (2a, 3a, 4a) While rotating along the center of the circle (2, 3, 4), the geometric center (1) of the three equidistant circular members (2a, 3a, 4a) synchronously revolves three times in the same direction, wherein the center circle (1a) of the three equidistant circular members (2a, 3a, 4a) and the coaxially mounted circular member (1b) convert the revolving motion of the geometric center (1) of the three equidistant circular members (2a, 3a, 4a) into synchronous revolving motion of the circular member (1b) along the eccentric point (O) by locking the eccentric point (O) of the circular member (1b), and the three equidistant circular members (2a, 3a, 4a), the outer 8-shaped trajectory line member (12) and the circular member (1b) A triangular rotary piston mechanism is formed; when the geometric center (1) of the three equidistant circular components (2a, 3a, 4a) and the geometric center (O) of the inner figure-8 trajectory component (11) are locked simultaneously, the inner figure-8 trajectory component (11) rotates three times along the geometric center (O), driving the three equidistant circles (2a, 3a, 4a) to rotate along the center (2, 3, 4), while driving the three equidistant circular components (2a, 3a, 4a) to rotate two times in the same direction along the geometric center (1), and the inner figure-8 trajectory component (11) and the three equidistant circular components (2a, 3a, 4a) form an figure-8 rotary piston mechanism;When the geometric center (1) of the three equidistant circular members (2a, 3a, 4a) and the geometric center (O) of the outer figure-8 trajectory line member (12) are locked simultaneously, the three equidistant circular members (2a, 3a, 4a) and the outer figure-8 trajectory line member (12) form a rotary piston motion pair, and the three equidistant circular members (2a, 3a, 4a) rotate twice along the geometric center (1), driving the three equidistant circles (2a, 3a, 4a) to rotate along the center (2, 3, 4) while driving the outer figure-8 trajectory line member (12) to rotate three times in the same direction along the geometric center (O), and the outer figure-8 trajectory line member (12) and the three equidistant circular members (2a , 3a, 4a) form a triangular rotary piston mechanism; when the inner 8-shaped trajectory line component (11) is locked, the three equidistant circular components (2a, 3a, 4a) and the inner 8-shaped trajectory line component (11) form a rotary piston motion pair, and the three equidistant circular components (2a, 3a, 4a) move one circle to drive the three equidistant circles (2a, 3a, 4a) to rotate along the center of the circle (2, 3, 4), while the geometric center (1) of the three equidistant circular components (2a, 3a, 4a) revolves three circles in the same direction synchronously, wherein the center circle (1a) of the three equidistant circular components (2a, 3a, 4a) and the coaxially mounted circular component (1b) are locked by the circular component ( 1b) eccentric point (O), the revolution motion of the geometric center (1) of the three equidistant circular components (2a, 3a, 4a) is converted into the synchronous rotation motion of the circular component (1b) along the eccentric point (O), the three equidistant circular components (2a, 3a, 4a), the inner 8-shaped trajectory line component (11) and the circular component (1b) form an 8-shaped rotary piston mechanism; when the center (2, 3, 4) of the three equidistant circular components (2a, 3a, 4a) is locked, the three equidistant circular components (2a, 3a, 4a) and the outer 8-shaped trajectory line component (12) form a rotary piston motion pair, and the outer 8-shaped trajectory line component (12) moves one circle to drive the three equidistant circular components (2a, 3a, 4a) to rotate. a, 3a, 4a) rotates along the circle center (2, 3, 4), while the geometric center (O) of the outer figure-8 trajectory line component (12) synchronously revolves twice in the opposite direction, wherein the center circle (Ob) of the outer figure-8 trajectory line component (12) and the coaxially mounted circular component (Oc) convert the revolving motion of the geometric center (O) of the outer figure-8 trajectory line component (12) into the synchronous revolving motion of the circular component (Oc) along the eccentric point (1) by locking the eccentric point (1) of the circular component (Oc), and the outer figure-8 trajectory line component (12), the three equidistant circular components (2a, 3a, 4a) and the circular component (Oc) form an figure-8 rotary piston mechanism;When the centers (6, 7, 8, 9) of the four equidistant circular components (6a, 7a, 8a, 9a) are locked, the four equidistant circular components (6a, 7a, 8a, 9a) and the inner zigzag trajectory component (13) form a rotary piston motion pair, and the inner zigzag trajectory component (13) moves one circle to drive the four equidistant circles (6a, 7a, 8a, 9a) to rotate along the centers (6, 7, 8, 9), while the geometric center (O) of the inner zigzag trajectory component (13) synchronously revolves three circles in the opposite direction, wherein the center circle (Ob) of the inner zigzag trajectory component (13) and the coaxially mounted circular component (Oc) rotate the inner zigzag trajectory by locking the eccentric point (1) of the circular component (Oc). The revolution motion of the geometric center (O) of the linear component (13) is converted into the synchronous rotation motion of the circular component (Oc) along the eccentric point (1); the inner zigzag trajectory linear component (13), the four equidistant circular components (6a, 7a, 8a, 9a) and the circular component (Oc) form a zigzag rotary piston mechanism; when the outer zigzag trajectory linear component (14) is locked, the four equidistant circular components (6a, 7a, 8a, 9a) and the outer zigzag trajectory linear component (14) form a rotary piston motion pair; the four equidistant circular components (6a, 7a, 8a, 9a) move one circle to drive the four equidistant circles (6a, 7a, 8a, 9a) to rotate along the center of the circle (6, 7, 8, 9), while the four equidistant circular components (6a, 7a, 8a, 9a) rotate along the center of the circle (6, 7, 8, 9). The geometric centers (1) of the four equidistant circular members (6a, 7a, 8a, 9a) revolve synchronously for four times in the same direction, wherein the center circles (1a) of the four equidistant circular members (6a, 7a, 8a, 9a) and the coaxially mounted circular member (1b) convert the revolving motion of the geometric centers (1) of the four equidistant circular members (6a, 7a, 8a, 9a) into the synchronous rotary motion of the circular member (1b) along the eccentric point (O) by locking the eccentric point (O) of the circular member (1b), and the four equidistant circular members (6a, 7a, 8a, 9a), the outer triangular trajectory line member (14) and the circular member (1b) form a square rotary piston mechanism; at the same time, the four equidistant circular members (6a, 7a, 8a, 9a) are locked. a) and the geometric center (O) of the inner zigzag trajectory line component (13), the four equidistant circular components (6a, 7a, 8a, 9a) and the inner zigzag trajectory line component (13) form a rotary piston motion pair, the inner zigzag trajectory line component (13) rotates four times along the geometric center (O), driving the four equidistant circles (6a, 7a, 8a, 9a) to rotate along the center of the circle (6, 7, 8, 9), while driving the four equidistant circular components (6a, 7a, 8a, 9a) to rotate three times in the same direction along the geometric center (1), and the inner zigzag trajectory line component (13) and the four equidistant circular components (6a, 7a, 8a, 9a) form a zigzag rotary piston mechanism;When the geometric center (1) of the four equidistant circular components (6a, 7a, 8a, 9a) and the geometric center (O) of the outer zigzag trajectory line component (14) are locked at the same time, the four equidistant circular components (6a, 7a, 8a, 9a) and the outer zigzag trajectory line component (14) form a rotary piston motion pair, and the four equidistant circular components (6a, 7a, 8a, 9a) rotate three times along the geometric center (1), driving the four equidistant circles (6a, 7a, 8a, 9a) to rotate along the center of the circle (6, 7, 8, 9) while driving the outer zigzag trajectory line component (14) to rotate four times in the same direction along the geometric center (O), and the outer zigzag trajectory line component (14) and the four equidistant circular components (6a, 7a, 8a, 9a) rotate three times along the geometric center (1), driving the four equidistant circles (6a, 7a, 8a, 9a) to rotate along the center of the circle (6, 7, 8, 9) simultaneously. a, 7a, 8a, 9a) form a square rotary piston mechanism; when the herringbone track line component (13) is locked, the four equidistant circular components (6a, 7a, 8a, 9a) and the herringbone track line component (13) form a rotary piston motion pair, and the four equidistant circular components (6a, 7a, 8a, 9a) move one circle to drive the four equidistant circles (6a, 7a, 8a, 9a) to rotate along the center of the circle (6, 7, 8, 9), while the geometric center (1) of the four equidistant circular components (6a, 7a, 8a, 9a) revolves four times in the same direction synchronously, wherein the center circle (1a) of the four equidistant circular components (6a, 7a, 8a, 9a) and the coaxially installed circular component (1b) are rotated four times by The eccentric point (O) of the circular component (1b) is locked, and the revolution motion of the geometric center (1) of the four equidistant circular components (6a, 7a, 8a, 9a) is converted into the synchronous rotation motion of the circular component (1b) along the eccentric point (O). The four equidistant circular components (6a, 7a, 8a, 9a), the herringbone trajectory line component (13) and the circular component (1b) form a herringbone rotary piston mechanism. When the centers (6, 7, 8, 9) of the four equidistant circular components (6a, 7a, 8a, 9a) are locked, the four equidistant circular components (6a, 7a, 8a, 9a) and the outer herringbone trajectory line component (14) form a rotary piston motion pair. The outer herringbone trajectory line component (14) moves one circle to drive the four equidistant circular components (6a, 7a, 8a, 9a) to rotate. While the equidistant circles (6a, 7a, 8a, 9a) rotate along the centers (6, 7, 8, 9), the geometric center (O) of the outer zigzag trajectory line component (14) synchronously revolves three times in the opposite direction, wherein the center circle (Ob) of the outer zigzag trajectory line component (14) and the coaxially mounted circular component (Oc) convert the revolving motion of the geometric center (O) of the outer zigzag trajectory line component (14) into the synchronous rotational motion of the circular component (Oc) along the eccentric point (1) by locking the eccentric point (1) of the circular component (Oc), and the outer zigzag trajectory line component (14), the four equidistant circular components (6a, 7a, 8a, 9a) and the circular component (Oc) form a square rotary piston mechanism.

2. A rotary piston mechanism according to claim 1, characterized in that: Three equidistant lines (1-2, 1-3, 1-4) intersect at a point (1) at an angle of 120 degrees to each other, three equidistant circles (2a, 3a, 4a) with the endpoints (2, 3, 4) of the three equidistant lines as the center and diameter d, the geometric structure center (1) of the three equidistant circles (2a, 3a, 4a) revolves at a rate of 3:1 on a circle (Oa) with an eccentricity e at the center (O) and a radius e, and the motion trajectories of the three equidistant circles (2a, 3a, 4a) form an 8-shaped circular ring array, and the inner and outer tangent points of the 8-shaped circular ring array form inner and outer 8-shaped trajectory lines (11, 12) The invention discloses a rotary piston structure, wherein the geometric structure of three equidistant circles (2a, 3a, 4a) and the geometric structure of inner and outer 8-shaped trajectory lines (11, 12) constitute a rotary piston component. When the locking component or the locking component geometric center (1, O) is combined, the kinematic pair elements formed by always maintaining the tangent geometric relationship and the characteristics of direct physical contact constitute the rotary piston kinematic pair, and the rotary piston mechanical principle that the transmission of force, the conversion of motion form and motion speed between components are achieved under the action of the force generated by the axiom that three non-collinear points determine a surface is followed; the four equidistant lines (1 -6, 1-7, 1-8, 1-9) intersect at a point (1) at 90 degrees, four equidistant circles (6a, 7a, 8a, 9a) with the four equidistant line endpoints (6, 7, 8, 9) as the center and diameter d, the center (1) of the geometric structure of the four equidistant circles (6a, 7a, 8a, 9a) revolves at a rate of 4:1 on a circle (Oa) with an eccentricity e at the center (O) and a radius e, and the motion trajectories of the four equidistant circles (6a, 7a, 8a, 9a) form a herringbone array, and the inner and outer tangent points of the herringbone array form inner and outer herringbone trajectory lines The geometric structure (13, 14), the geometric structure of four equidistant circles (6a, 7a, 8a, 9a) and the geometric structure of the inner and outer triangular trajectory lines (13, 14) constitute a rotary piston component. In the rotary piston movement formed by locking the component or locking the geometric center (1, O) of the component, the kinematic pair elements formed by always maintaining the tangent geometric relationship and the characteristics of direct physical contact constitute the rotary piston kinematic pair, and follow the mechanical principle that the force generated by the axiom of three non-collinear points determining a surface is achieved between the components to achieve force transmission, motion form and motion speed conversion.

3. A rotary piston mechanism according to claim 1, further comprising an 8-shaped rotary piston displacement pump, characterized in that: The figure-8 rotary piston (11) is formed by stretching the geometric structure of the inner figure-8 track line (11), and is installed on the shaft (15) through a center hole to form an inner rotor of the figure-8 rotary piston displacement pump. The two ends of the shaft (15) are installed on the end covers (39, 40) through bearings (47, 48). The end covers (39, 40) are installed at the axial ends of the pump body (36) through fasteners (52), so that the inner rotor rotates along the geometric center (O) of the figure-8 rotary piston. The positioning rollers (2a, 3a, 4a) are formed by stretching the geometric structure of three equidistant circles (2a, 3a, 4a), and are installed on the side plates (17, 18) along the center of the circle (2, 3, 4) through the side plates (17, 18) through bearings (19, 20, 21, 22, 23, 24). The side plates (17, 18) are installed on the axial ends of the cylinder body (16) through fasteners (52). The positioning rollers (2a, 3a, 4a) and the side plates (17) are , 18) and a cylinder body (16) form an outer rotor of an 8-shaped rotary piston displacement pump, the cylindrical surface of the cylinder body (16) is coaxially assembled with the center hole of the pump body (36), so that the outer rotor rotates along the geometric center (1) of the positioning rollers (2a, 3a, 4a), the 8-shaped rotary piston (11) and the positioning rollers (2a, 3a, 4a) form a rotary piston kinematic pair, and the space enclosed by the side plates (17, 18) and the cylinder body (16) is divided into three independent cylinder chamber working volumes through the characteristics of always tangent geometric relationship and direct physical contact; the inner rotor 8-shaped rotary piston (11) rotates three times, driving the positioning rollers (2a, 3a, 4a) to rotate along the center of the circle (2, 3, 4), while driving the outer rotor to rotate twice in the same direction along the geometric center (1) of the positioning rollers (2a, 3a, 4a), and the 8-shaped rotary piston (11) completes 6 rotational in and 6 rotational out strokes in the three cylinder chamber working volumes in sequence.

4. A rotary piston mechanism according to claim 3, characterized in that: The fluid passes through the inlet (50) of the end cover (39) to communicate with the suction semi-circular groove (41), and passes through the hole (38) of the pump body (36) to communicate with the suction semi-circular groove (43) of the end cover (40). The fluid passes through the outlet (51) of the end cover (39) to communicate with the discharge semi-circular groove (42), and passes through the hole (37) of the pump body (36) to communicate with the discharge semi-circular groove (44) of the end cover (40); the holes (30, 31, 32, 33, 34, 35) on the side plates (17, 18) cooperate with the suction semi-circular grooves (41, 43) and the discharge semi-circular grooves (42, 44) on the end covers (39, 40). When the inner and outer rotors rotate to the starting point of the suction stroke of the working volume of the cylinder chamber, the corresponding holes start to overlap with the suction semi-circular grooves (41, 43), and the fluid inlet (50) starts to conduct the working volume of the cylinder chamber to enter the suction stroke. When the inner and outer rotors rotate to the end point of the suction stroke of the working volume of the cylinder chamber, the corresponding holes start to separate from the suction semi-circular grooves (41, 43), and the channel of the working volume of the cylinder chamber is cut off and the suction stroke ends; when the inner and outer rotors rotate to the starting point of the compression stroke of the working volume of the cylinder chamber, the corresponding holes start to overlap with the discharge semi-circular grooves (42, 44), and the fluid outlet (51) conducts the working volume of the cylinder chamber to enter the compression stroke. When the inner and outer rotors rotate to the end point of the compression stroke of the working volume of the cylinder chamber, the corresponding holes start to separate from the discharge semi-circular grooves (41, 43), and the channel of the working volume of the cylinder chamber is cut off and the compression stroke ends.

5. A rotary piston mechanism according to claim 3 or 4, characterized in that: The radial seals (25, 26, 27) are pressed against the cylindrical surfaces of the positioning rollers (2a, 3a, 4a) by the pressure provided by the packing at the bottom of the U-shaped mounting groove. The radial movement gap between the sealed and isolated rotary piston moving pair and the cylinder block (16) is δ1; the radial seals (25, 26, 27) and the U-shaped mounting groove extend into the side plates (17, 18) and are in communication with the radial movement gap δ3 between the positioning rollers (2a, 3a, 4a) and the side plates (17, 18). The radial movement gap δ3 between the positioning rollers (2a, 3a, 4a) and the side plates (17, 18) is sealed and isolated by the radial seals (25, 26, 27); the axial seals (28, 29) are pressed against the two axial surfaces of the figure-eight rotary piston (11) by the pressure provided by the packing at the bottom of the mounting groove. The axial movement gap between the sealed and isolated figure-eight rotary piston (11) and the side plates (17, 18) is δ2; the semi-circular ring axial seals (45, 46) are pressed against the two axial surfaces of the side plates (17, 18) by the pressure provided by the packing at the bottom of the mounting groove. The axial movement gap δ4 between the fluid discharge channel between the side plates (17, 18) and the end covers (39, 40) is sealed and isolated; the mechanical seal (49) is installed in the counterbore of the end cover (39). The radial movement gap between the sealed and isolated shaft and the end cover (39) is δ5.

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