CN108180143B

CN108180143B - Tangent circle rotor pair, compressor and engine

Info

Publication number: CN108180143B
Application number: CN201810071714.XA
Authority: CN
Inventors: 曹桂林
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-01-25
Filing date: 2018-01-25
Publication date: 2021-05-07
Anticipated expiration: 2038-01-25
Also published as: CN108180143A

Abstract

The tangent circle rotor pair comprises a first rotor and a second rotor, the tangent circle rotor pair is arranged in a cylinder sleeve, and the first rotor and the second rotor respectively form at least one line contact or surface contact with the cylinder sleeve; the first rotor is tangent to the second rotor during rotation, and a cavity with reduced volume and enlarged volume is formed between the first rotor and the cylinder sleeve at any moment during rotation of the first rotor and the second rotor. The invention also provides a compressor and an engine. When the tangent circular rotor pair of the invention rotates in a counter-rotating way between the rotors, the rotors and the rotors are kept in a tangent state all the time, thereby ensuring the air tightness between the rotors, inhibiting the surge between the rotors, bearing larger impact force and providing larger fluid pressure. Meanwhile, the tangent circle rotor pair can also be applied to power devices with rotor pairs, such as compressors, cylinders, engines and the like, and is high in compression efficiency, strong in working stability, powerful in power and long in service life.

Description

Tangent circle rotor pair, compressor and engine

Technical Field

The invention relates to the field of power devices, in particular to a tangent circle rotor pair, a compressor and an engine.

Background

A compressor (compressor) is a driven fluid machine that raises low-pressure gas into high-pressure gas. The high-pressure refrigerant gas is sucked from the air suction pipe, is compressed by the driving of the motor driving the piston, and then is discharged to the exhaust pipe to provide power for the refrigeration cycle. Thereby realizing a refrigeration cycle of compression → condensation (heat release) → expansion → evaporation (heat absorption).

The compressors are classified into piston compressors, screw compressors, centrifugal compressors, linear compressors, and the like. The problems of low volume utilization rate and high manufacturing difficulty of the conventional main-flow double-screw compressor are discovered through investigation, and the Roots blower has the defects of high surge noise and the like.

Disclosure of Invention

In view of the above, the present invention aims to overcome the defects in the prior art, and provide a tangential circular rotor pair, a compressor and an engine with high compression efficiency, strong working stability, strong power and long service life.

The invention provides the following technical scheme: the tangent circle rotor pair comprises a first rotor and a second rotor, the tangent circle rotor pair is arranged in a cylinder sleeve, and the first rotor and the second rotor respectively form at least one line contact or surface contact with the cylinder sleeve; the first rotor is tangent to the second rotor when rotating, and a cavity with reduced volume and enlarged volume is formed between the first rotor and the cylinder sleeve at any moment when the first rotor and the second rotor rotate.

In an exemplary embodiment, the main bodies of the first rotor and the second rotor are cylinders, one of the first rotor and the second rotor is provided with a boss on a cylindrical surface, and the other rotor is provided with a groove matched with the boss on the cylindrical surface; when the first rotor and the second rotor rotate, the lug boss is continuously embedded in and separated from the groove.

In an exemplary embodiment, the boss is an arc-shaped protrusion formed by a cylinder intersected with the cylinder, and the groove is an arc-shaped groove formed by a hole intersected with the cylinder.

In an exemplary embodiment, the boss is removably attached to the cylinder.

In an exemplary embodiment, the material of the boss is a self-lubricating or wear resistant material.

In an exemplary embodiment, the main bodies of the first rotor and the second rotor are cylinders, the first rotor is provided with a first boss and a first groove, and the second rotor is provided with a second groove matched with the first boss and a second boss matched with the first groove; when the first rotor and the second rotor rotate, the first boss is continuously engaged with and disengaged from the second groove, and the first groove is continuously engaged with and disengaged from the second boss.

In an exemplary embodiment, the number of the first rotors is one, the number of the second rotors is at least one, and each of the second rotors is tangential to the rotating first rotor when rotating.

In an exemplary embodiment, the tangent circle rotor pair further comprises a rotating shaft, the rotating shaft is coaxially arranged on the first rotor and the second rotor respectively, cooling ducts are arranged on the first rotor and the second rotor, and a liquid inlet channel and a liquid outlet channel which are communicated with the cooling ducts are correspondingly arranged on the rotating shaft.

As a further extension to the above technical solution: the invention also provides a compressor, which comprises a cylinder sleeve and the tangent circular rotor pair, wherein a cavity tangent to the first rotor and the second rotor is formed on the cylinder sleeve, and the first rotor and the second rotor are rotationally fixed on the cylinder sleeve; and the first rotor and the second rotor are communicated with the exhaust port through a cavity with a reduced volume formed between the cylinder sleeves when rotating, and are communicated with the air inlet through a cavity with an enlarged volume formed between the cylinder sleeves.

As a further extension to the above technical solution: the invention also provides an engine, which comprises a cylinder sleeve and the tangent circular rotor pair, wherein a cavity tangent to the first rotor and the second rotor is formed on the cylinder sleeve, and the first rotor and the second rotor are rotationally fixed on the cylinder sleeve; and the cylinder sleeves are provided with an inlet valve and an exhaust valve, when the first rotor and the second rotor rotate, a cavity with a reduced volume formed between the first rotor and the second rotor is communicated with the exhaust valve, and a cavity with an enlarged volume formed between the first rotor and the second rotor is communicated with the inlet valve.

The embodiment of the invention has at least the following advantages:

when the tangent circle rotor pair rotates in a contrarotating way between the rotors, the rotors are kept in a tangent state constantly, so that the air tightness between the rotors is ensured, and particularly, the contrarotating air tightness of the rotors in the air suction or compression process is realized, no air gap is generated, the surge between the rotors is inhibited, and meanwhile, the rotor pair can bear larger impact force and provide larger fluid pressure. Meanwhile, the tangent circle rotor pair can also be applied to power devices with rotor pairs, such as compressors, cylinders, engines and the like, and is high in compression efficiency, strong in working stability, powerful in power and long in service life.

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible and comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 shows an isometric view of a pair of tangent circular rotors provided in embodiment 1 of the present invention;

FIG. 2 is a front view of a pair of tangent circular rotors provided in embodiment 1 of the present invention;

FIG. 3 shows a schematic view of boss and groove formation of a rotor provided in embodiment 1 of the present invention;

fig. 4 shows a front view of a compressor provided in embodiment 2 of the present invention;

fig. 5 is an exploded schematic view of a rotor provided in embodiment 2 of the present invention;

fig. 6 is a schematic view showing a cooling structure of a rotor provided in embodiment 2 of the present invention;

fig. 7 shows a front view of an engine provided in embodiment 3 of the present invention.

Icon: 1-a compressor; 2-an engine; 10-tangent circle rotor pair; 101-a first rotor; 1011-boss; 1012-cooling ducts; 102-a second rotor; 1021-a groove; 103-a rotating shaft; 1031-a liquid inlet channel; 1032-liquid outlet channel; 20-cylinder liner; 201-air inlet; 202-an exhaust port; 203-an intake valve; 204-exhaust valve.

Detailed Description

Various embodiments of the present invention will be described more fully hereinafter with reference to the accompanying drawings. The invention is capable of various embodiments and of modifications and variations therein. The invention will therefore be described in more detail with reference to specific embodiments shown in the accompanying drawings. However, it should be understood that: there is no intention to limit various embodiments of the invention to the specific embodiments of the invention herein, but rather, the invention is to cover all modifications, equivalents, and/or alternatives falling within the spirit and scope of various embodiments of the invention. Like reference numerals refer to like elements throughout the description of the figures.

Hereinafter, the term "comprising" or "may include" used in various embodiments of the present invention indicates the presence of the invented function, operation or element, and does not limit the addition of one or more functions, operations or elements. Furthermore, as used in various embodiments of the present invention, the terms "comprises," "comprising," "includes," "including," "has," "having" and their derivatives are intended to mean that the specified features, numbers, steps, operations, elements, components, or combinations of the foregoing, are only meant to indicate that a particular feature, number, step, operation, element, component, or combination of the foregoing, and should not be construed as first excluding the existence of, or adding to the possibility of, one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing.

In various embodiments of the invention, the expression "or" at least one of a or/and B "includes any or all combinations of the words listed simultaneously. For example, the expression "a or B" or "at least one of a or/and B" may include a, may include B, or may include both a and B.

Expressions (such as "first", "second", and the like) used in various embodiments of the present invention may modify various constituent elements in various embodiments, but may not limit the respective constituent elements. For example, the above description does not limit the order and/or importance of the elements described. The foregoing description is for the purpose of distinguishing one element from another. For example, the first user device and the second user device indicate different user devices, although both are user devices. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of various embodiments of the present invention.

It should be noted that: if it is described that one constituent element is "connected" to another constituent element, the first constituent element may be directly connected to the second constituent element, and a third constituent element may be "connected" between the first constituent element and the second constituent element. In contrast, when one constituent element is "directly connected" to another constituent element, it is understood that there is no third constituent element between the first constituent element and the second constituent element.

The terminology used in the various embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the various embodiments of the invention. As used herein, the singular forms are intended to include the plural forms as well, unless the context clearly indicates otherwise. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which various embodiments of the present invention belong. The terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning that is consistent with their contextual meaning in the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein in various embodiments of the present invention.

Example 1

Fig. 1 shows an isometric view of a pair of tangentially circular rotors 10, and fig. 2 shows a front view of the pair of tangentially circular rotors 10.

The tangent circle rotor pair 10 includes a first rotor 101 and a second rotor 102. The tangent circle rotor pair 10 is disposed in a cylinder casing (not shown), and the first rotor 101 and the second rotor 102 are each in at least one line contact or surface contact with the cylinder casing 20. The first rotor 101 is tangent to the second rotor 102, and the first rotor 101 and the second rotor 102 form a cavity with reduced volume and enlarged volume with the cylinder sleeve at the moment when rotating.

The tangent circle rotor pair 10 can be applied to equipment such as a rotary cylinder, a compressor, a vane pump, an engine and the like, the first rotor 101 and the second rotor 102 rotate synchronously, air suction (liquid suction) is performed when the volume of the cavity is enlarged, and air exhaust (liquid drainage) is performed when the volume of the cavity is reduced. The first rotor 101 and the second rotor 102 are driven to rotate by an external driving device, so that the suction (liquid suction) and discharge (liquid discharge) operations are realized, the discharge pressure of gas (liquid) is increased, and the device using the tangential circular rotor pair 10 is a compressor 1 (vane pump). The device using the tangent circle rotor pair 10 is a rotary cylinder because the cavity is inflated and deflated, so that the gas drives the first rotor 101 and the second rotor 102 to rotate. The intake, compression, power application and exhaust strokes of the internal combustion engine are completed by changing the volume of the chamber through rotation, and then the power of the first rotor 101 and the second rotor 102 is output through an external power conversion mechanism, so that the device applying the tangent circular rotor pair 10 becomes an engine.

The first rotor 101 and the second rotor 102 are always tangent when rotating, and no gap exists between the rotors, so that good sealing is formed. The first rotor 101 and the second rotor 102 are respectively tangent or tangent to the cylinder sleeve all the time, and no gap exists between the rotors and the cylinder sleeve, so that good sealing is formed. The first rotor 101 and the second rotor 102 can maintain good airtightness even when compressing gas or liquid during counter-rotation (synchronous rotation), so that a large gas pressure or hydraulic pressure can be provided, a large impact force can be borne, the working noise is low, and the service life is long.

The main bodies of the first rotor 101 and the second rotor 102 are cylinders, one of the first rotor 101 and the second rotor 102 is provided with a boss 1011 on the cylindrical surface, and the other rotor is provided with a groove 1021 matched with the boss 1011 on the cylindrical surface; when the first rotor 101 and the second rotor 102 rotate, the boss 1011 is continuously engaged with and disengaged from the recess 1021.

In this embodiment, the tangential circular rotor pair 10 is applied to a compressor, the tangential circular rotor pair 10 includes a first rotor 101 and a second rotor 102, the first rotor 101 is provided with a boss 1011, and the second rotor 102 is provided with a groove 1021. When the first rotor 101 and the second rotor 102 rotate in the opposite direction, the gas is compressed by the side where the boss 1011 and the groove 1021 have a tendency to engage, and is sucked by the side where the boss 1011 and the groove 1021 have a tendency to separate. The boss 1011 on the first rotor 101 corresponds to a piston head, and pressurization of the gas is achieved by the action of the piston head.

The boss 1011 is an arc protrusion formed by a cylinder intersected with the cylinder, and the groove 1021 is an arc groove 1021 formed by a hole intersected with the cylinder. The boss 1011 and the cylinder penetrate in the whole length direction, the groove 1021 and the cylinder penetrate in the whole length direction correspondingly, so that good isolation between the air inlet cavity and the compression cavity is guaranteed, good air tightness is formed between the boss 1011 and the groove 1021 through tangent surfaces or lines, when the boss 1011 and the groove 1021 are not jointed, the boss 1011 and the cylinder sleeve 20 are tangent, and cylindrical surfaces of the two cylinders of the first rotor 101 and the second rotor 102 are tangent.

As shown in fig. 3, since the first rotor 101 and the second rotor 102 are prisms having a constant radial cross section, the cross sections of the first rotor 101 and the second rotor 102 will be described here. The main body of the cross section of the first rotor 101 is an a circle, a C circle intersects the a circle, the center of the C circle is moved by a certain radian along the side line of the a circle, for example, 5 °, the cross section of the boss 1011 is formed by the area through which the C circle passes excluding the part intersecting the a circle, and the cross section of the first rotor 101 is formed by the area through which the C circle passes and the a circle. Similarly, the main body of the cross section of the second rotor 102 is a circle B, the circle C intersects with the circle B, the center of the circle C moves along the side line of the circle B by an arc equal to that of the circle C on the circle a, 5 °, the cross section of the boss 1011 is formed at the intersection of the area where the circle C passes and the circle a, and the cross section of the first rotor 101 is formed at the area where the circle a passes except the circle C. Here, the groove 1021 matching with the boss 1011 is actually the groove 1021 matching with the circular motion track of the boss 1011, not the groove 1021 matching with the shape of the boss 1011.

Because the boss 1011 is when not engaging with recess 1021, boss 1011 is tangent with the cylinder liner, therefore the profile of the cavity of cylinder liner is formed by the circular motion orbit at the top of boss 1011, in this embodiment, one section circumference profile is directly chooseed for use at the top of boss 1011, thereby make boss 1011 and cylinder liner when tangent and form the arc surface contact between the cylinder liner, when guaranteeing boss 1011 and recess 1021's coupling, the gas tightness between chamber and the compression chamber of breathing in is better, the impact that can bear is bigger, prevent that sharp limit from receiving the influence of wind pressure to form the sound and making an uproar.

In other embodiments, the protrusion 1011 and the groove 1021 may have other shapes, and all the protrusion 1011 and the groove 1021 performing the suction and compression functions by engaging and separating fall within the scope of the present invention. The number of the bosses 1011 may also be 2 or more, and the number of the grooves 1021 is equal to the number of the bosses 1011.

It should be noted that the main bodies of the first rotor 101 and the second rotor 102 are the same cylinder, so that the first rotor 101 and the second rotor 102 synchronously and uniformly rotate in opposite directions, and it is ensured that the boss 1011 can rotate to a position corresponding to the groove 1021 every rotation.

Example 2

Fig. 4 shows a front view of the compressor 1. The compressor 1 comprises a cylinder sleeve 20 and a tangent circular rotor pair 10, wherein a cavity tangent to a first rotor 101 and a second rotor 102 is formed on the cylinder sleeve 20, and the first rotor 101 and the second rotor 102 are rotationally fixed on the cylinder sleeve 20. An air inlet 201 and an air outlet 202 are arranged on the cylinder sleeve 20, when the first rotor 101 and the second rotor 102 rotate, a cavity with reduced volume formed between the first rotor 101 and the second rotor 102 is communicated with the air outlet 202, and a cavity with enlarged volume formed between the first rotor 101 and the second rotor 102 is communicated with the air inlet 201.

In this embodiment, the main bodies of the first rotor 101 and the second rotor 102 are cylinders, the first rotor 101 is provided with a boss 1011 and a groove 1021, the second rotor 102 is provided with a groove 1021 and a boss 1011, which are matched with the boss 1011 and the groove 1021 on the first rotor, when the first rotor 101 and the second rotor 102 rotate, the boss 1011 on the first rotor 101 and the groove 1021 on the second rotor 102 are continuously engaged and disengaged, and the groove 1021 on the first rotor 101 and the boss 1011 on the second rotor 102 are continuously engaged and disengaged.

As described above, it can be understood that the first rotor 101 and the second rotor 102 are the same rotor, and the projections 1011 and the grooves 1021 are simultaneously formed thereon, while the projections 1011 and the grooves 1021 of the first rotor 101 and the second rotor 102 are arranged to intersect.

Two bosses 1011 are oppositely arranged on the first rotor 101, the two bosses 1011 are distributed at 180 degrees, two grooves 1021 are oppositely arranged on the first rotor 101, and the two grooves 1021 are distributed at 180 degrees and are distributed at 90 degrees with the bosses 1011. The second rotor 102 is the same rotor as the first rotor 101, and when installed, the first rotor 101 and the second rotor 102 are installed to intersect at 90 °.

The outer contour of the cylinder sleeve 20 is kidney-shaped, the contour of the cavity of the cylinder sleeve 20 is two crossed round holes, the contour of the round holes is the track of the circular motion of the boss 1011, and the axle center distance of the two round holes is the axle center distance of the first rotor 101 and the second rotor 102.

When the first rotor 101 and the second rotor 102 rotate oppositely, at least 3 bosses 1011 are tangent to the cylinder sleeve 20, so that 3 air cavities are formed between the rotors and the cylinder sleeve 20, one of the cavities is an air inlet cavity, one of the cavities is a compression cavity, the other cavity is a transition cavity, the transition cavity is not communicated with the air inlet 201 and the exhaust port 202 in the cylinder sleeve 20, the transition effect of air inlet and exhaust is achieved, the tangent point of the rotors and the cylinder sleeve 20 is increased, the sealing performance of the cavities is better, the born impact force is larger, and larger compression force can be provided.

As shown in fig. 5, the boss 1011 is detachably attached to the cylinder. The boss 1011 forms a cavity in the cylinder sleeve 20 relative to the projection of the cylinder, and air suction and air compression are realized through the change of the position of the boss 1011, namely, the boss 1011 is equivalent to a piston head, and the piston head generates sliding friction with the inner wall of the cylinder sleeve 20 during operation and is the most easily worn part on a rotor. The boss 1011 is detachably arranged on the cylinder, so that when the boss 1011 is worn and the form is changed, the boss cannot be well attached to the cylinder sleeve 20, the boss can be quickly replaced.

In addition, the material of the boss 1011 is a self-lubricating or wear-resistant material. In this embodiment, the material of the boss 1011 can be nylon, which has better wear resistance and self-lubrication, and is smoother in the sliding friction process between the boss 1011 and the cylinder sleeve 20. The boss 1011 may also be made of heat treated cast iron with high hardness, cast iron with wear-resisting and lubricating coating on the surface, teflon material with good lubricating effect, plastic, brass, etc.

The processing precision of the inner walls of the first rotor 101, the second rotor 102 and the cylinder sleeve 20 is improved, the sealing requirements between the rotors and the cylinder sleeve 20 can be better met, when the precision is high enough, lubricating oil can not be arranged between the rotors and the cylinder sleeve 20 and between the rotors, the oil-free state in the compressor 1 is ensured, and the high-power compressor 1 is very necessary.

As shown in fig. 6, the tangential circular rotor pair 10 further includes a rotating shaft 103, and the rotating shafts 103 are coaxially provided on the first rotor 101 and the second rotor 102, respectively. The rotating shaft 103 is connected with the rotors through keys, and the first rotor 101 and the second rotor 102 are respectively connected with the cylinder sleeve 20 in a rotating mode through the rotating shaft 103. The first rotor 101 and the second rotor 102 run inside the cylinder sleeve 20, and when the temperature rises during running, the whole rotor is deformed when the temperature of the rotor is too high, so that the normal running of the compressor 1 is affected, and therefore the temperature of the rotor needs to be reduced.

The first rotor 101 and the second rotor 102 are provided with cooling holes 1012, and the rotating shaft 103 is correspondingly provided with a liquid inlet passage 1031 and a liquid outlet passage 1032 which are communicated with the cooling holes 1012. The liquid inlet passage 1031 is a blind hole on the rotating shaft 103, the opening of the liquid inlet passage 1031 is arranged at one end of the rotating shaft 103, the liquid outlet passage 1032 is a blind hole on the rotating shaft 103, the opening of the liquid outlet passage 1032 is arranged at the other end of the rotating shaft 103, a hole passage which penetrates through the liquid inlet passage 1031 in the radial direction is arranged on the liquid inlet passage 1031 and is communicated with a cooling hole passage 1012 on the rotor, the cooling hole passage 1012 on the rotor is F-shaped, and the cooling hole passage 1012. The cooling system further comprises a circulating pump and a refrigerating device, so that the cooling liquid forms a circulating loop between the rotating shaft 103 and the first rotor 101, and heat of the rotor is taken out through heat exchange between the cooling liquid and the rotor, so that the rotor is moderate and has a proper working temperature.

In another embodiment, the first rotor 101 and the second rotor 102 are provided with a plurality of heat dissipation slots, and the arrangement of the plurality of heat dissipation slots increases the contact area between the first rotor 101 and the second rotor 102 and the air, and accelerates the heat dissipation of the rotors. Be equipped with the through-hole on the pivot 103, the both ends of through-hole are connected with circulation line, through the cooling to pivot 103 for pivot 103 becomes a cooling rod, forms heat exchange through thermal contact and rotor, cools down the rotor.

It can be understood that the compressor 1 of the present embodiment may also be used as a rotary cylinder and an engine 2 through modification, and the exhaust valve 204 of the intake valve 203 is added to the positions of the intake port 201 and the outlet port, so that the structure is modified into a rotary engine 2.

Example 3

Fig. 7 shows a front view of the engine 2. The engine 2 comprises a cylinder sleeve 20 and a tangent circular rotor pair 10. In the embodiment, the tangent circular rotor pair 10 includes a first rotor 101 and three second rotors 102, each second rotor 102 is tangent to the rotating first rotor 101 when rotating, and the rotation direction of the second rotor 102 is opposite to the rotation direction of the first rotor 101. Three second rotors 102 are circumferentially and evenly distributed on the outer side of the first rotor 101.

The cylinder casing 20 forms a cavity tangential to the first rotor 101 and the second rotor 102, the first rotor 101 and the second rotor 102 being rotationally fixed to the cylinder casing 20. The cylinder sleeve 20 is provided with an intake valve 203 and an exhaust valve 204, and the first rotor 101 and the second rotor 102 communicate with a cavity formed between the cylinder sleeve 20 and having a reduced volume and the exhaust valve 204 when rotating, and communicate with a cavity formed between the cylinder sleeve 20 and having an enlarged volume and the intake valve 203.

The volume of the cavity on one side of the tangent/surface of the first rotor 101 and the second rotor 102 is increased, and the volume of the cavity on the other side is reduced, so that the combination of the first rotor 101 and the second rotor 102 forms a power unit, which is equivalent to a piston cylinder, the first rotor 101 and the second rotor 102 can complete four starting strokes of air intake, compression, power application and air exhaust in the process of counter-rotating, and the continuous driving of the first rotor 101 and the second rotor 102 is realized through the processes of oil gas suction and ignition, so that the rotating shafts 103 on the first rotor 101 and the second rotor 102 rotate continuously.

The planetary gear train is arranged to output power of the rotating shaft 103, wherein the first rotor 101 is coaxially connected with the planet carrier, the second rotor 102 is coaxially connected with the star wheel, so as to drive the sun gear to rotate, and the rotating power of the sun gear is output, so that the power output of the engine 2 is realized.

In other embodiments, the number of the first rotors 101 is one, and the number of the second rotors 102 may also be 1, 2, 4 or more, the first rotor 101 corresponds to a sun rotor, the second rotor 102 is a planet rotor, and the change of the volume of the cavity enclosed between the rotors and the cylinder liner 20 is realized through the counter-rotation of the first rotor 101 and the second rotor 102.

In this embodiment, 5 bosses 1011 are uniformly and annularly distributed on the second rotor 102, the bosses 1011 are small cylinders intersecting with the cylinders, the axes of the small cylinders fall on the generatrix of the cylinders, and 5 grooves 1021 matched with the bosses 1011 are uniformly and annularly distributed on the first rotor 101. The advantage of this arrangement is that the contact of the second rotor 102 with the cylinder liner 20 is increased, resulting in a better air tightness between the rotor and the cylinder liner 20, a higher efficiency of the engine 2 and a stronger power.

In all examples shown and described herein, any particular value should be construed as merely exemplary, and not as a limitation, and thus other examples of example embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

The above examples are merely illustrative of several embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.

Claims

1. The tangent circle rotor pair is characterized by comprising a first rotor and a second rotor, wherein the tangent circle rotor pair is arranged in a cylinder sleeve, and the first rotor and the second rotor respectively form at least one line contact or surface contact with the cylinder sleeve;

the first rotor is tangent to the second rotor which rotates when rotating, and a cavity with reduced volume and enlarged volume is formed between the first rotor and the cylinder sleeve at any moment when the first rotor and the second rotor rotate;

the number of the first rotors is one, the number of the second rotors is multiple, each second rotor is respectively tangent to the rotating first rotor when rotating, a plurality of bosses are uniformly distributed on the second rotors in an annular manner, and a plurality of grooves matched with the bosses are uniformly distributed on the first rotors in an annular manner;

the main body of the cross section of the second rotor is an A circle, a C circle is intersected with the A circle, the center of the C circle moves by a certain radian along the side line of the A circle, the cross section of the boss is formed by removing the part intersected with the A circle from the area passed by the C circle, the cross section of the second rotor is formed by combining the area passed by the C circle and the A circle, similarly, the main body of the cross section of the first rotor is a B circle, the C circle is intersected with the B circle, the center of the C circle moves by the same radian on the A circle as the C circle along the side line of the B circle, the cross section of the groove is formed by the part intersected with the B circle from the area passed by the C circle, and the cross section of the first rotor is formed by removing the area passed by the C circle from the B circle.

2. The pair of tangentially-circular rotors of claim 1 wherein the bodies of said first and second rotors are cylindrical;

when the first rotor and the second rotor rotate, the lug boss is continuously embedded in and separated from the groove.

3. The pair of tangential circular rotors of claim 2, wherein said boss is removably attached to said cylindrical body.

4. The pair of tangential circular rotors of claim 3, wherein said boss is of a self-lubricating or wear resistant material.

5. The tangent circle rotor pair of claim 1, wherein the bodies of the first rotor and the second rotor are cylinders, the first rotor is provided with a first boss and a first groove, and the second rotor is provided with a second groove matched with the first boss and a second boss matched with the first groove;

when the first rotor and the second rotor rotate, the first boss is continuously engaged with and disengaged from the second groove, and the first groove is continuously engaged with and disengaged from the second boss.

6. The tangent circular rotor pair as claimed in any one of claims 1 to 5, further comprising a rotating shaft, wherein the rotating shaft is coaxially disposed on each of the first rotor and the second rotor, the first rotor and the second rotor are provided with cooling channels, and the rotating shaft is correspondingly provided with a liquid inlet channel and a liquid outlet channel communicated with the cooling channels.

7. The compressor, characterized by comprising a cylinder sleeve and the tangent circular rotor pair of any one of claims 1 to 6, wherein the cylinder sleeve is provided with a cavity tangent to the first rotor and the second rotor, and the first rotor and the second rotor are rotationally fixed on the cylinder sleeve;

and the first rotor and the second rotor are communicated with the exhaust port through a cavity with a reduced volume formed between the cylinder sleeves when rotating, and are communicated with the air inlet through a cavity with an enlarged volume formed between the cylinder sleeves.

8. An engine, characterized in that it comprises a cylinder jacket and the tangent circular rotor pair of any one of claims 1 to 6, said cylinder jacket forming a cavity tangent to said first rotor and said second rotor, said first rotor and said second rotor being rotationally fixed on said cylinder jacket;

and the cylinder sleeves are provided with an inlet valve and an exhaust valve, when the first rotor and the second rotor rotate, a cavity with a reduced volume formed between the first rotor and the second rotor is communicated with the exhaust valve, and a cavity with an enlarged volume formed between the first rotor and the second rotor is communicated with the inlet valve.