WO2023016239A1 - Single-piston annular cylinder, and rotor air compressor and rotor internal combustion engine comprising same - Google Patents

Abstract

A single-piston annular cylinder, and a rotor air compressor and a rotor internal combustion engine applying the annular cylinder, wherein the annular cylinder comprises three parts, i.e., a housing assembly, and a rotor ring assembly and a rotor piston assembly arranged in the housing assembly. The housing assembly and the rotor ring assembly are concentrically arranged, and a gap therebetween forms an annular cylinder. The contour of the inner surface of the housing assembly is not a perfect circle, and an arc-shaped protrusion (13) is provided on the circumferential surface of the inner surface of the housing assembly. The protrusion (13) is always in contact with the front surface of a rotor ring (21), and the contact portion forms a constant sealing tangent. According to the annular cylinder, the gap between the rotor ring assembly and the housing assembly is divided into two independent and non-communicated cavities by using a simple element, and the two independent cavities change in an equal proportion with the rotation of the rotor piston assembly.

Description

Single-piston annular cylinder and its rotor air compressor and rotor internal combustion engine technical field

The invention relates to the field of air compressors, in particular to a single-piston annular cylinder and its rotor air compressor and rotor internal combustion engine.

Background technique

An air compressor, referred to as an air compressor, is a device that converts the mechanical energy of a motor or engine into pressure energy or kinetic energy, and belongs to general machinery. The types of existing air compressors include reciprocating piston type, diaphragm type, screw type, sliding vane type, centrifugal type and axial flow type. Common compressors mainly include reciprocating piston compressors, screw compressors, vane compressors and centrifugal compressors.

EP2356317B1 discloses a rotary piston engine comprising a housing, an air inlet and an exhaust port, said housing housing a cylindrical rotor about an axis of rotation in a given direction of rotation (DR) and at least one Rotary pistons, at least one counter piston. But the structure of the device is complex, difficult to control and implement, and the sealing effect is not good enough.

CN203604149U discloses a piston of an air compressor, including a piston body, a spring, a snap ring and a buffer plate, and the spring is arranged between the inner chamber of the piston body and the buffer plate, so that when the buffer piston moves downward, the piston top of the air compressor pressure on the wall. But this device can't form effective pressure in the main body, can't make the gas that the air inlet enters completely enter the exhaust port.

For this reason, a high-efficiency, low-energy consumption single-piston annular cylinder with strong airtightness and simple structure is needed, as well as its rotor air compressor and rotor internal combustion engine.

Contents of the invention

The purpose of the present invention is to solve the defects of the prior art and provide a single-piston annular cylinder and its rotor air compressor and rotor internal combustion engine. The device has a simple structure. The contour of the inner surface of the casing assembly is not a perfect circle, so that it is different from the contour of the perfect circle outer surface of the rotor ring assembly, so that the rotor ring assembly and the casing assembly always have a part in contact, and the contact part Form a constant sealing tangent line; and through a piston arranged on the ring wall of the rotor ring, the top of the piston is always in contact with the housing assembly through the reciprocating movement of the piston, thereby connecting the rotor ring assembly and the housing assembly The annular cylinder formed by the gap between them is divided into two independent and non-communicating cavities, and the two independent cavities change proportionally with the rotation of the rotor-piston assembly.

A single-piston annular cylinder, comprising a casing assembly, a rotor ring assembly and a rotor-piston assembly arranged inside the casing assembly; wherein the casing assembly and the rotor ring assembly are arranged concentrically, The gap between the rotor ring assembly and the housing assembly forms an annular cylinder; wherein the contour of the inner surface of the housing assembly is not a perfect circle, and an arc-shaped boss is arranged on the circumferential surface of the inner surface , the boss and the inner surface of the housing assembly smoothly transition; the arc height of the arc-shaped boss is consistent with the height of the annular cylinder, so that it always keeps in contact with the front of the rotor ring, and the contact part forms Always seal the tangent.

The rotor assembly is concentrically arranged inside the housing assembly, the rotor ring assembly has an outer surface engaging the inner surface of the housing assembly, and the outer surface has a perfect circle; the rotor ring The ring wall of the assembly is provided with a notch along the axial direction of the ring wall, which is used to set the rotor piston assembly so that the rotor piston assembly rotates together with the rotor assembly; when the When the rotor-piston assembly moves to the position where the boss is located, the rotor-piston assembly makes a vertical reciprocating movement in the notch along with the shape of the boss;

When the piston assembly is in contact with the boss, the outer surface of the rotor ring assembly is not in contact with the inner surface of the casing assembly; when the piston assembly is not in contact with the inner surface of the casing assembly When in partial contact, a part of the peripheral surface of the outer surface of the rotor ring assembly is always kept in contact with a part of the inner surface of the housing assembly, and the remaining part does not contact the inner surface of the housing assembly, and the rotor piston assembly The top end of the rotor ring assembly is in contact with a part of the inner surface of the housing assembly, thereby dividing the gap between the rotor ring assembly and the housing assembly into two independent and disconnected cavities, the two independent The cavity changes proportionally with the rotation of the rotor-piston assembly.

Further, the two ends of the boss form an inclination angle of 20-150° with the axis center of the inner surface of the housing assembly.

Further, the housing assembly includes: a housing ring and two opposite annular housing side walls connected to its annular edge; an arc-shaped boss is provided on the inner wall of the housing ring, and the housing ring and the protrusion The positions corresponding to the platform are respectively provided with through air inlets and air outlets.

Further, the rotor ring assembly includes a perfect circular rotor ring and a rotor shaft, the rotor ring is supported by the rotor shaft and rotates along the rotor shaft, and the rotor shaft runs through the rotor along the axis of the rotor ring ring; the ring wall of the rotor ring is provided with a notch along the axial direction of the ring wall; one end of the rotor shaft is connected to the power source, and the other end is equipped with a gear; the two ends of the rotor ring have a flange extending circumferentially outward at the end of the rotor ring, the flange having a height equal to the height of the gap between the rotor ring assembly and the housing assembly, the The flange forms an annular cylinder between the casing ring and the rotor ring.

Further, the rotor-piston assembly includes: a piston housing, and a piston and a return spring arranged inside the piston housing; the piston housing is fixedly installed at the notch on the inner surface of the rotor ring; The longitudinal section is trapezoidal, including a top and a bottom, the outer contour of the bottom is adapted to the contour of the notch, and the top of the piston is used to contact a part of the inner surface of the housing assembly; the bottom of the piston and the bottom of the piston are The inner wall of the piston housing is provided with a plurality of return spring slots corresponding to the positions for installing a plurality of return springs; the return spring is arranged in the cavity between the piston and the inner wall of the piston housing, and the return spring The piston is driven to reciprocate so that the top of the piston is tangent to the inner surface of the housing assembly.

Further, the boss and the inner wall of the shell ring are integrated, or the boss is fixedly connected to the inner wall of the shell ring.

Further, the edge of the outer wall of the arc-shaped boss is arc-shaped, and the arc and the front arc of the rotor ring form a tangential sealing line.

Further, the flange is integrally formed with the rotor ring, or two sealing rings are sleeved on the end of the outer surface of the rotor ring.

Further, the top end of the piston is longitudinally provided with grooves for setting sealing rollers; the sealing rollers are used to be tangent to the inner surface of the housing assembly.

The second invention point of the present invention lies in the rotor air compressor using the above-mentioned single-piston annular cylinder.

The third invention point of the present invention lies in the rotary internal combustion engine using the above-mentioned single-piston annular cylinder.

Compared with the prior art, the present invention has the following advantages:

1. The structure of the present invention is simple. By setting a boss on the inner surface of the housing assembly, the contour of the inner surface of the housing assembly is not a perfect circle, and the arc height of the boss is equal to the thickness of the annular cylinder, so that Different from the outer surface profile of the perfect circle of the rotor ring assembly, a part of the rotor ring assembly is always in contact with the housing assembly, and the contact part forms a constant sealing tangent;

2. In the present invention, only one piston is arranged on the ring wall of the rotor ring. When the rotor ring assembly rotates, it drives the piston on the ring wall of the rotor ring to rotate together. When the piston passes through When the boss is in the position, the piston presses down through the elastic element inside it, and when it passes the boss, the elastic element lifts the piston up again;

3. Using simple components to divide the gap between the rotor ring assembly and the housing assembly into two independent and disconnected cavities, the two independent cavities are separated with the rotation of the rotor piston assembly proportional change.

Description of drawings

Fig. 1 is the structural representation of the shell assembly of single-piston annular cylinder of the present invention;

Fig. 2 is a schematic diagram of each part of the shell assembly; wherein Fig. 2a is a bottom view of the shell ring, and Fig. 2b is a front view of the shell ring;

Fig. 2c is a front view of the shell ring side sealing plate;

Fig. 3 is a schematic structural view of the rotor ring assembly and the rotor piston assembly of the single-piston annular cylinder of the present invention;

Fig. 4 is a schematic diagram of the components of the rotor ring assembly; Fig. 4a is a bottom perspective view of the rotor ring; Fig. 4b is a front view of the rotor ring; Fig. 4c is a top perspective view of the rotor ring; Fig. 4d is a bottom perspective view of the rotor piston; Fig. 4e is a rotor The inner view of the piston housing; Figure 4f shows the assembly diagram of the rotor ring, the rotor piston and the rotor piston housing; Figure 4g shows the assembly diagram of the rotor ring and the rotor piston;

Figure 5 shows a schematic diagram of the rotor piston passing through the arc-shaped boss;

Figure 6 shows a schematic diagram of the normal operating state of the rotor piston, that is, the state when it does not pass through the arc-shaped sealing boss;

In the picture:

11: Shell ring 12: Shell side wall 1201: The first screw hole

13: Boss 1301, 1302: Boss end 14: Air inlet

15: Air outlet 16: Shaft hole 21: Rotor ring

22: Rotor shaft 23: Flange 31: Piston housing

32: Piston 33: Top of piston 34: Notch

35: Sealed roller 36: Return spring groove 37: Piston bottom

38: cavity

Detailed ways

In order to make the purpose, technical solutions, beneficial effects and significant progress of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings provided in the embodiments of the present invention, Obviously, all described embodiments are only some embodiments of the present invention, rather than all embodiments; based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative work Embodiments all belong to the protection scope of the present invention.

As shown in Figures 1-6, a single-piston annular cylinder for a rotary air compressor/rotary internal combustion engine includes a casing assembly, a rotor ring assembly and a rotor-piston assembly arranged inside the casing assembly. .

Figures 1-2 show a schematic structural view of the housing assembly of the single-piston annular cylinder according to the present invention. The casing assembly includes a casing ring 11 and two opposite annular casing side walls 12 connected to its annular edge, and a plurality of correspondingly arranged first A screw hole 1201 is used to connect the shell ring 11 and the shell side wall 12 by bolts. A shaft hole 16 is provided in the middle of the housing side wall 12 for installing the rotor shaft 22 . The inner wall of the housing ring 11 is provided with an arc-shaped boss 13, which smoothly transitions with the inner surface of the housing assembly; the corresponding position of the housing ring 11 and the boss 13 of the boss The air inlet 14 and the air outlet 15 (as shown in FIG. 2 a ) are respectively provided through through. The boss 13 can also be a trapezoid or an obtuse triangle. In practical applications, the trapezoidal or triangular bosses will generate greater noise when the rotor rotates at high speed, so the arc-shaped bosses 13 are preferred. The boss 13 can be integrally formed with the shell ring 11 (as shown in FIG. 4 ), or can be fixedly connected by riveting or other methods (as shown in FIG. 2 a ). The inner surface profile of the housing ring 11 after the boss 13 is provided is non-circular, which is different from the perfect circular outer surface profile of the rotor ring 21 . When the boss 13 is fixedly connected to the shell ring 11, the long side of the arc-shaped boss is the same as the inner diameter of the shell ring and is tightly attached to the inner wall of the shell ring, Its two ends 1301, 1302 form an inclination angle of 30° with the axis center of the inner surface of the housing assembly, and the arc height of the arc-shaped boss 13 is equal to the height of the annular cylinder, so that it always keeps in contact with the front of the rotor ring. And this contact portion forms a constant sealing tangent.

As shown in Figure 3, Figures 4a-4c, the rotor ring assembly has an outer surface engaging the inner surface of the housing assembly; the rotor ring assembly includes a perfectly circular rotor ring 21 and a rotor shaft 22, the There is a shaft hole 16 in the middle of the rotor ring 21 for accommodating the rotor shaft 22, the rotor ring 21 is supported by the rotor shaft 22 and rotates along the rotor shaft 22, and the rotor shaft 22 rotates along the rotor shaft 21. The axis runs through the rotor ring 21; the ring wall of the rotor ring 21 is provided with a notch 34 along the axial direction of the ring wall, which is used to fix the rotor piston assembly so that the rotor piston assembly to rotate together with the rotor assembly; one end of the rotor shaft 22 is connected to a power source, and the other end is equipped with a gear; both ends of the rotor ring 21 have flanges 23, and the flanges 23 are on the The end of the rotor ring 21 extends outward in the circumferential direction, the height of the flange 21 is the same as the height of the gap between the rotor ring assembly and the casing assembly, and the flange 21 makes the casing ring An annular cylinder is formed between 11 and the rotor ring 21, and the flange 21 may be integrally formed with the rotor ring 21, or two sealing rings may be sleeved on the end of the outer surface of the rotor ring.

As shown in Figures 4d-4g, the rotor-piston assembly includes: a piston housing 31, a piston 32 and a return spring (not shown) disposed inside the piston housing 31; the piston housing 31 opens toward The inner surface of the rotor ring is fixed at the position of the notch 34 by screws. As shown in FIG. 4 e , there are four return spring grooves at the bottom of the inner wall of the piston housing 31 for fixing one end of the return spring, and the other end of the return spring is fixed on the bottom 37 of the piston.

As shown in Figure 4d, the longitudinal section of the piston is trapezoidal, including a top end 33 and a bottom 37, and the outer contour of the piston bottom 37 is rectangular to fit the contour of the notch 34, for when the device is running, The piston is lifted above the outer surface of the rotor ring, and the top end 33 of the piston is used to contact a part of the inner surface of the housing assembly; the top end of the piston is longitudinally grooved, and a sealing roller 35 is placed ; The sealing roller 35 is used to be tangent to the inner surface of the shell assembly. The piston bottom 37 has a return spring groove 36 corresponding to the inner wall of the piston housing. The return spring is arranged in the cavity 38 between the piston 32 and the inner wall of the piston casing 31, and the return spring drives the piston 32 to reciprocate up and down, so that the top of the piston and the casing assembly Tangent to the inner surface.

As shown in Figures 5-6, the rotor assembly is arranged concentrically inside the housing assembly. When the single-piston annular cylinder runs clockwise, the rotor shaft 22 drives the rotor ring 21 to rotate, and when the piston 32 moves to the position of the end 1301 of the boss 13, the boss gradually presses down on the Said piston 32, at this time the top of said piston 32 is tangent to said boss, until the top 33 of said piston 32 is squeezed to the outer surface of said rotor ring 21 when running to the center of said boss 13 flush (as shown in Figure 5), with the operation of the rotor ring, the return spring pushes out the piston 32 upwards, and the sealing roller 35 at the top of the piston 32 continues to contact it on the smooth transition boss surface until it runs to the other end 1302 of the boss 13 . During the period when the piston 32 is in contact with the boss, the outer surface of the rotor ring 21 is not in contact with the outer shell ring 11; subsequently, the rotor ring continues to run, and the top end of the piston 33 returns to its original position under the action of the return spring. The sealing roller 35 is in contact with the non-boss inner surface of the casing ring 11, at this time, a part of the peripheral surface of the outer surface of the rotor ring is in contact with a part of the inner surface (including the boss) of the casing ring, The remaining part does not contact the inner surface of the housing ring (as shown in Figure 6), but the rotor piston tip 33 is in contact with a part of the inner surface of the housing ring 11, thereby connecting the rotor ring assembly to the housing The gap between the assemblies (ie, the annular cylinder) is divided into two independent and disconnected cavities that change proportionally with the rotation of the rotor-piston assembly.

In actual application, the annular cylinder is suitable for a rotary air compressor/rotary internal combustion engine.

The above embodiments and specific cases are only used to illustrate the technical scheme of the present invention, rather than to limit it, although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that it still The technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced, and these modifications or replacements do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the various embodiments of the present invention. , non-essential improvements, adjustments or replacements made by those skilled in the art based on the contents of this specification all fall within the scope of protection claimed by the present invention.

Claims (10)

A single-piston annular cylinder is characterized in that it includes a casing assembly, a rotor ring assembly and a rotor piston assembly arranged inside the casing assembly; wherein the casing assembly and the rotor ring assembly The concentric shafts are arranged, and the gap between the rotor ring assembly and the shell assembly forms an annular cylinder; wherein the contour of the inner surface of the shell assembly is not a perfect circle, and a circle is set on the circumferential surface of the inner surface Arc-shaped boss (13), the boss (13) and the inner surface of the housing assembly smoothly transition; the arc height of the arc-shaped boss is consistent with the height of the annular cylinder, so as to be consistent with the rotor ring The front faces remain in contact at all times, and this contact portion forms a constant seal tangent; The rotor assembly is concentrically arranged inside the housing assembly, the rotor ring assembly has an outer surface engaging the inner surface of the housing assembly, and the outer surface has a perfect circle; the rotor ring The ring wall of the assembly is provided with a notch (34) along the axial direction of the ring wall, which is used to set the rotor piston assembly so that the rotor piston assembly rotates together with the rotor assembly ; When the rotor piston assembly moves to the position where the boss (13) is located, the rotor piston assembly performs vertical reciprocating movement in the notch (34) along with the shape of the boss; When the piston assembly is in contact with the boss (13), the outer surface of the rotor ring assembly is not in contact with the inner surface of the housing assembly; when the piston assembly is in contact with the inner surface of the housing assembly When the non-boss part is in contact, a part of the peripheral surface of the outer surface of the rotor ring assembly is always in contact with a part of the inner surface of the housing assembly, and the remaining part does not contact the inner surface of the housing assembly. The top end of the piston assembly is in contact with a part of the inner surface of the housing assembly, thereby dividing the gap between the rotor ring assembly and the housing assembly into two independent and disconnected cavities, the two Each independent cavity changes proportionally with the rotation of the rotor-piston assembly. The single-piston annular cylinder according to claim 1, characterized in that, the housing assembly comprises a housing ring (11) and two opposite annular housing side walls (12) connected to its annular edge; the housing The inner wall of the ring (11) is provided with an arc-shaped boss (13), and the positions corresponding to the shell ring (11) and the boss (13) are respectively provided with through air inlets (14) and air outlets ( 15). The single-piston annular cylinder according to claim 2, characterized in that, the rotor ring assembly includes a perfect circular rotor ring (21) and a rotor shaft (22), and the rotor ring (21) is ) supports and rotates along the rotor shaft, the rotor shaft (22) runs through the rotor ring along the axis of the rotor ring (21); the ring wall of the rotor ring (21) is provided with A notch (34) opened in the axial direction of the wall; one end of the rotor shaft is connected to the power source, and the other end is equipped with a gear; the two ends of the rotor ring (21) have flanges (23), and the flange (23) extending circumferentially outward at the end of the rotor ring (21), the height of the flange (23) being the same as the height of the gap between the rotor ring assembly and the housing assembly, The flange (23) forms an annular cylinder between the casing ring (11) and the rotor ring (12). The single-piston annular cylinder according to claim 3, characterized in that, the rotor-piston assembly comprises: a piston housing (31), a piston (32) and a return spring arranged inside the piston housing (31); The piston casing (31) is fixedly installed at the notch (34) on the inner surface of the rotor ring (21); the longitudinal section of the piston (32) is trapezoidal, including a top (33) and a bottom (37), The outer contour of the bottom (37) is adapted to the contour of the notch (34), and the top end of the piston (33) is used to contact a part of the inner surface of the housing assembly; the bottom of the piston (37) ) and the inner wall of the piston housing (31) are provided with a plurality of corresponding return spring grooves (36) for installing a plurality of return springs; the return spring is arranged on the piston (32) and the inner wall of the piston housing In the cavity (38) between, the return spring drives the piston (32) to reciprocate, so that the top end of the piston (33) is tangent to the inner surface of the housing assembly. The single-piston annular cylinder according to claim 2, characterized in that, the boss (13) and the inner wall of the housing ring (11) are integrally structured or the boss (13) is fixedly installed It is connected with the inner wall of the shell ring (11). The single-piston annular cylinder according to claim 3, characterized in that, the flange (23) is integrally formed with the rotor ring (21), or two sealing rings are sleeved on the rotor ring (21) outer surface ends. The single-piston annular cylinder according to claim 4, wherein the top end of the piston (32) is longitudinally grooved for setting a sealing roller (35); the sealing roller (35) is used for Tangent to the inner surface of the housing assembly. The single-piston annular cylinder according to claim 1, characterized in that, the two ends of the boss (13) form an inclination angle of 20-150° with the axis center of the inner surface of the housing assembly. A rotary air compressor, characterized by comprising the single-piston annular cylinder according to any one of the above claims. A rotary internal combustion engine, characterized by comprising the single-piston annular cylinder described in any one of claims 1-9.

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