CN210509375U - Fluid energy conversion device and rotary engine - Google Patents

Abstract

The utility model relates to a fluid energy conversion device and rotary engine. The closed line is formed by connecting a first curve, a second curve, a third curve, a fourth curve, a fifth curve, a sixth curve, a seventh curve and an eighth curve, the inner contour line of the cross section of the working cavity is a circle with the axis of the rotor as the center of a circle and the radius of the rotor as the radius, and the contour line of the cross section of the planetary roller is a closed line formed by connecting a fifth curve, a sixth curve, a seventh curve, an eighth curve, a ninth curve, a tenth curve, an eleventh curve and a twelfth curve. The utility model discloses can satisfy simultaneously that the fluid volume is variable, the reliable sealed requirement of rotor for stator inner chamber coaxial line is rotatory to promote fluid energy conversion device and rotary engine's performance.

Description

Fluid energy conversion device and rotary engine

Technical Field

The utility model relates to a fluid energy conversion device and rotary engine, accessible fluid volume change converts fluid pressure potential energy into driving torque, or converts input torque into fluid kinetic energy or potential energy, mainly is applied to fields such as internal-combustion engine, steam turbine, the hydraulic turbine, compressor, pneumatic motor, hydraulic motor, fluid pump, vacuum pump.

Background

At present, many fluid energy conversion devices convert energy or transfer fluid through volume change of fluid, and the volume change of fluid is mostly realized through relative rotation motion between a stator and a rotor, such as a rotary engine, a steam turbine, a water turbine, a compressor, a pneumatic motor, a hydraulic pump, a vacuum pump, and the like. The mechanical structural forms of the devices are various, and the devices comprise blade type, impeller type, turbine type, vortex type, runner type, rotary blade type, rotary swing type, sliding blade type, gear type, screw type, roots type, claw type and the like, but the structural forms can not simultaneously meet the requirements of variable fluid volume, reliable fluid sealing and coaxial rotation of a rotor relative to an inner cavity of a stator, so that some defects exist.

Firstly, a blade type: for example, the blades on the rotor of a steam turbine are arranged and combined on the rotor in a certain mode, mainly for the conversion of kinetic energy and less for the conversion of pressure potential energy.

The method has the following defects: poor sealing performance, low conversion efficiency and complex structure.

Secondly, a rotating wheel type: for example, the rotating wheels on the rotor of the water turbine realize the conversion of potential energy and kinetic energy of water flow through a plurality of rotating wheels on the rotor.

The method has the following defects: poor sealing performance, low conversion efficiency and large vibration.

Thirdly, rotating the sheet type: when the rotor eccentrically arranged in the cylinder body rotates, the sliding vane in the longitudinal groove of the rotor is forced to cling to the cylinder wall to freely slide along the radial direction, so that fluid is promoted to circularly enter and exit.

The method has the following defects: sliding friction exists between the rotor and the pump cavity, the rotor not only does linear reciprocating motion, but also eccentrically rotates, the sealing performance is not high, the rotating speed is not high, and the abrasion, the energy consumption and the vibration are large.

Fourthly, rotating and swinging: the rotor rotates around the eccentric shaft in the cylinder body, and fluid is separated through a slide vane or a slide valve, so that the separated volume is periodically changed, and the fluid is promoted to enter and exit. The method is mainly applied to vacuum pumps and the like.

The method has the following defects: poor sealing performance, poor dynamic balance performance, large abrasion, large vibration noise, low rotating speed and low energy efficiency.

Fifthly, screw type: the fluid is driven to enter and exit (or be compressed) through the reverse rotation of a pair of mutually meshed spiral male and female rotors (screw rods) in the cylinder, and the device is mainly applied to liquid pumps, compressors, vacuum pumps, blowers and the like.

The method has the following defects: the processing and assembling difficulty is high, the sealing effect is difficult to improve due to the shape of the screw and the dynamic meshing mode, the clearance leakage is high, the cost is high, the size is large, the discharge capacity is small, and the vibration is large under certain conditions.

Sixthly, Roots type: the fluid is driven to circulate in and out by the synchronous and reverse rotation of two mutually meshed Roots rotors (8-shaped, three-lobe and four-lobe) in the cylinder, and the two rotors are mainly applied to compressors, vacuum pumps, blowers and the like.

The method has the following defects: the sealing effect of the rotor is difficult to improve due to the appearance and the meshing mode of the rotor, the gap leakage is large, the energy efficiency is not high, and the processing difficulty is large.

Seventhly, vortex type: the double-function scroll compressor is formed by mutually meshing a movable scroll and a fixed scroll of two double-function equation molded lines, the movable scroll performs translation eccentric rotation (non-autorotation) with a small radius around the center of a base circle of the fixed scroll under the drive of an eccentric shaft, fluid is gradually compressed in a plurality of crescent compression cavities formed by meshing the movable scroll and the fixed scroll, and then the fluid is continuously discharged from an axial hole in the center of the fixed scroll, and the double-function scroll compressor is mainly applied to compressors and the like.

The method has the following defects: poor leakproofness, clearance leak great, compression ratio is low, and the eccentric motion of driving disk has restricted the rotational speed and has improved, and have vibrations, and the volume flow is lower.

Eighthly, impeller type: such as gas turbines and jet engines, the impeller is generally composed of a disk, a shroud, and blades. The fluid rotates at high speed with the impeller under the action of the impeller blades, and the fluid is acted by the rotating centrifugal force and flows in the impeller in a diffusion manner, so that the pressure of the fluid after passing through the impeller is improved.

The method has the following defects: the lower compression ratio affects the fuel combustion efficiency and is noisy.

Ninthly, a turbine type: such as gas turbines and jet engines, the turbine uses the fluid with energy to impact the propeller blades, and the main shaft connected with the turbine is driven to rotate, so that the kinetic energy of the fluid is converted into mechanical energy.

The method has the following defects: the turbine has low conversion utilization rate of the fuel gas energy and is easy to cause turbulence to the jet gas.

Ten, rotor engine: the pressure potential energy of gas expansion is converted into the driving torque of an output shaft, the conversion efficiency is high, but the technology of only a Mazda rotary engine (Wankel) is relatively mature at present.

The method has the following defects: the three tops of the triangular rotor and the stator wall are always in sliding friction with constantly changing positions, so that the abrasion is large, the sealing effect of fluid is influenced, the oil consumption is high, and the emission is high; the compression ratio is low, the combustion efficiency of fuel is low, and the emission is high; the elongated combustion chamber shape also affects the flame propagation speed, further affecting the combustion efficiency of the fuel. The rotor eccentrically rotates in the stator relative to the stator, and the rotor revolves around the center of the output shaft and simultaneously rotates around the center of a convex shaft on the output shaft, so that the rotor is difficult to provide good lubrication and cooling, and the vibration and energy loss are large. The compression ratio of the engine is low, so that the combustion cannot be sufficient, the combustion efficiency is low, the emission is difficult to reach the standard, the flame propagation speed is also influenced by the shape of a long and narrow combustion chamber, the combustion efficiency of the fuel is further influenced, and the low compression ratio causes that only an ignition mode can be adopted but a compression ignition mode cannot be adopted, namely only gasoline can be used as the fuel but diesel oil cannot be used.

Disclosure of Invention

The utility model aims at providing a fluid energy conversion device makes it can satisfy simultaneously that the fluid volume is variable, the reliable sealed and rotor of fluid is for the rotatory requirement of stator inner chamber coaxial line to promote fluid energy conversion device's performance.

Another object of the present invention is to provide a rotary engine, which can satisfy the requirement of the coaxial line rotation of the fluid volume, the fluid reliable sealing and the rotor relative to the stator inner cavity simultaneously, so as to improve the performance of the rotary engine.

The utility model discloses a fluid energy conversion device, including stator and the rotor that is arranged in stator cavity, the rotor passes through the rotor shaft and rotatably supports the both ends at the stator, the rotor is cylindrical, it and stator cavity coaxial line normal running fit in stator cavity, on the cylindrical inner chamber wall with rotor normal running fit's stator, seted up recess along circumference, make and form airtight working chamber between stator and the rotor, the inner contour line of this working chamber cross section is for using rotor axle center as the centre of a circle, rotor radius is the circle of radius, the outer contour line of this working chamber cross section is the closed line that is formed by first circular arc line, second circular arc line, third circular arc line, fourth circular arc line, first curve, second curve, third curve, fourth curve, fifth curve, sixth curve, seventh curve and eighth curve connection; four cavity grooves are axially arranged on a cylindrical surface of the rotor, the four cavity grooves are uniformly arranged in the circumferential direction of the rotor, the contour line of the cross section of each cavity groove is an arc line, two end surfaces of each cavity groove are respectively flush with two side surfaces of the corresponding groove, a planetary roller is arranged in each cavity groove, the planetary rollers are rotatably supported at two ends of the rotor through a roller shaft and are coaxial with the cavity grooves, the contour line of the cross section of the planetary roller is a closed line formed by connecting a fifth arc line, a sixth arc line, a seventh arc line, an eighth arc line, a ninth curve, a tenth curve, an eleventh curve and a twelfth curve, the closed line is a figure which is centrosymmetric about the central point of the cross section of the planetary roller, and is also a rotationally symmetric figure which takes the central point as a rotationally symmetric center and has a rotation angle of 90 degrees, in a plane right-angle coordinate system which takes the central point as the origin, the ninth curve and the, the equation for the ninth curve is:

x²+( R₂-y)²- R₁ ²=0, wherein-a ≦ x ≦ a, (R)₂- R₁）≤y≤b。

The fifth circular arc line and the sixth circular arc line as well as the seventh circular arc line and the eighth circular arc line are respectively symmetrical relative to the ordinate axis, and the radius of the fifth circular arc line, the radius of the sixth circular arc line, the radius of the seventh circular arc line and the radius of the eighth circular arc line are consistent with the radius of the cross section contour line of the cavity groove and are R₃- R₁。

In the outer contour lines of the cross section of the working cavity, a first arc line is connected between a first curve and an eighth curve, a second arc line is connected between a second curve and a third curve, a third arc line is connected between a fourth curve and a fifth curve, a fourth arc line is connected between a sixth curve and a seventh curve, the first curve is connected with the second curve, the third curve is connected with the fourth curve, the fifth curve is connected with the sixth curve, the seventh curve is connected with the eighth curve, the first, second, third and fourth arc lines are arc lines which take the axle center of a rotor as the center of a circle and take the radius of the rotor as the radius, the outer contour line of the cross section of the working cavity is a figure which is centrosymmetric about the center point of the cross section of the rotor, and is also a rotationally symmetric figure which takes the center point as the rotational symmetry center and has a rotation angle of 90 degrees, and in a plane right-angle coordinate system which takes the center point as the origin point, the first arc line and the second arc line, and the first curve and the second curve are respectively symmetrical relative to the ordinate axis, and the equation of the first curve is as follows:

（x-a）²+（y-b）²- R₁ ²=0, wherein 0 ≦ x ≦ a · R₃/（R₃- R₁），b·R₃/（R₃- R₁）≤y≤（R₁+b）。

The equation for the second curve is:

（x+a）²+（y-b）²- R₁ ²=0, wherein-a · R₃/（R₃- R₁）≤x≤0，b·R₃/（R₃- R₁）≤y≤（R₁+b）。

In the above formulae, a = R₁·(1-(( R₂ ²+2·R₁·R₃- R₃ ²)/(2· R₁·R₂))²)^1/2，

b=( R₂ ²-2·R₁·R₃+R₃ ²)/(2·R₂)。

Wherein R is₁Is the distance between the axis of the planetary roller and the axis of the rotor, R₂Radius of the rotor, R₃The radius of a first arc line, a second arc line, a third arc line and a fourth arc line in the outer contour line of the cross section of the working cavity.

The planetary rollers are in running fit with the cavity grooves in the cavity grooves, and two end faces of the planetary rollers are attached to two end faces of the cavity grooves and two side faces of the grooves.

And when the rotor rotates, the four planetary rollers only do circular translation motion without rotation relative to the stator under the action of the planetary roller synchronous control mechanism.

The stator is provided with four fluid inlets and four fluid outlets which are communicated with the working cavity, and through ports of the four fluid inlets on the inner wall of the stator are respectively positioned on one side of a curved surface of the inner wall of the stator corresponding to a first curve near a crest line of the inner wall of the stator corresponding to a connection point of a first curve and a second curve, one side of a curved surface of the inner wall of the stator corresponding to a third curve near a crest line of the inner wall of the stator corresponding to a connection point of a third curve and a fourth curve, one side of a curved surface of the inner wall of the stator corresponding to a fifth curve near a crest line of the inner wall of the stator corresponding to a connection point of a fifth curve and a sixth curve, and one side of a curved surface of the inner wall of the stator corresponding to a seventh curve near a crest line of the inner wall corresponding; the through holes of the four fluid outlets on the inner wall of the stator are respectively positioned on one side of a curved surface of the inner wall of the stator corresponding to a second curve near a crest line of the inner wall of the stator corresponding to a connection point of a first curve and a second curve, one side of a curved surface of the inner wall of the stator corresponding to a fourth curve near a crest line of the inner wall of the stator corresponding to a connection point of a third curve and a fourth curve, one side of a curved surface of the inner wall of the stator corresponding to a sixth curve near a crest line of the inner wall of the stator corresponding to a connection point of a fifth curve and a sixth curve, and one side of a curved surface of the inner wall of the stator corresponding to an eighth curve near a crest line of the inner wall of the stator.

The through hole of the fluid inlet on the inner wall of the stator is positioned on the curved surface of the inner wall of the stator corresponding to the first curve, the third curve, the fifth curve and the seventh curve; and the through hole of the fluid outlet on the inner wall of the stator is positioned on the curved surface of the inner wall of the stator corresponding to the second curve, the fourth curve, the sixth curve and the eighth curve.

The group of fluid inlets and fluid outlets positioned on the curved surface of the inner wall of the stator corresponding to the first curve and the second curve, the group of fluid inlets and fluid outlets positioned on the curved surface of the inner wall of the stator corresponding to the third curve and the fourth curve, the group of fluid inlets and fluid outlets positioned on the curved surface of the inner wall of the stator corresponding to the fifth curve and the sixth curve, and the group of fluid inlets and fluid outlets positioned on the curved surface of the inner wall of the stator corresponding to the seventh curve and the eighth curve can be simultaneously and respectively covered by the curved surfaces of the planetary rollers corresponding to the ninth curve, the tenth curve, the eleventh curve and the twelfth curve.

Alternatively, the through openings of the fluid inlet and the fluid outlet on the inner wall of the stator can also be positioned on the inner wall of the end part of the stator.

When the rotor rotates to the position that the edge line of the inner wall of the stator is in contact with the curved surface of the planetary roller corresponding to the ninth curve, the tenth curve, the eleventh curve and the twelfth curve, the four fluid inlets and the four fluid outlets can be simultaneously and respectively communicated with eight closed spaces formed between the curved surface of the planetary roller and the inner wall of the stator.

The utility model discloses a rotor engine, including the stator with be located the rotor of stator inner chamber, the rotor passes through the rotor shaft and rotatably supports the both ends at the stator, the rotor is cylindrical, it and stator inner chamber coaxial line normal running fit in stator inner chamber, on the cylindrical inner chamber wall with rotor normal running fit's stator, seted up flutedly along circumference, make and form airtight working chamber between stator and the rotor, the inner contour of this working chamber cross section is for using rotor axle center as the centre of a circle, rotor radius is the circle of radius, the outer contour of this working chamber cross section is the closed line that is formed by first circular arc line, the second circular arc line, the third circular arc line, the fourth circular arc line, first curve, the second curve, the third curve, the fourth curve, the fifth curve, the sixth curve, the seventh curve and the eighth curve connection; four cavity grooves are axially arranged on a cylindrical surface of the rotor, the four cavity grooves are uniformly arranged in the circumferential direction of the rotor, the contour line of the cross section of each cavity groove is an arc line, two end surfaces of each cavity groove are respectively flush with two side surfaces of the corresponding groove, a planetary roller is arranged in each cavity groove, the planetary rollers are rotatably supported at two ends of the rotor through a roller shaft and are coaxial with the cavity grooves, the contour line of the cross section of the planetary roller is a closed line formed by connecting a fifth arc line, a sixth arc line, a seventh arc line, an eighth arc line, a ninth curve, a tenth curve, an eleventh curve and a twelfth curve, the closed line is a figure which is centrosymmetric about the central point of the cross section of the planetary roller, and is also a rotationally symmetric figure which takes the central point as a rotationally symmetric center and has a rotation angle of 90 degrees, in a plane right-angle coordinate system which takes the central point as the origin, the ninth curve and the, the equation for the ninth curve is:

x²+( R₂-y)²- R₁ ²=0, wherein-a ≦ x ≦ a, (R)₂- R₁）≤y≤b。

The fifth circular arc line and the sixth circular arc line as well as the seventh circular arc line and the eighth circular arc line are respectively symmetrical relative to the ordinate axis, and the radius of the fifth circular arc line, the radius of the sixth circular arc line, the radius of the seventh circular arc line and the radius of the eighth circular arc line are consistent with the radius of the cross section contour line of the cavity groove and are R₃- R₁。

In the outer contour lines of the cross section of the working cavity, a first arc line is connected between a first curve and an eighth curve, a second arc line is connected between a second curve and a third curve, a third arc line is connected between a fourth curve and a fifth curve, a fourth arc line is connected between a sixth curve and a seventh curve, the first curve is connected with the second curve, the third curve is connected with the fourth curve, the fifth curve is connected with the sixth curve, the seventh curve is connected with the eighth curve, the first, second, third and fourth arc lines are arc lines which take the axle center of a rotor as the center of a circle and take the radius of the rotor as the radius, the outer contour line of the cross section of the working cavity is a figure which is centrosymmetric about the center point of the cross section of the rotor, and is also a rotationally symmetric figure which takes the center point as the rotational symmetry center and has a rotation angle of 90 degrees, and in a plane right-angle coordinate system which takes the center point as the origin point, the first arc line and the second arc line, and the first curve and the second curve are respectively symmetrical relative to the ordinate axis, and the equation of the first curve is as follows:

（x-a）²+（y-b）²- R₁ ²=0, wherein 0 ≦ x ≦ a · R₃/（R₃- R₁），b·R₃/（R₃- R₁）≤y≤（R₁+b）。

The equation for the second curve is:

（x+a）²+（y-b）²- R₁ ²=0, wherein-a · R₃/（R₃- R₁）≤x≤0，b·R₃/（R₃- R₁）≤y≤（R₁+b）。

In the above formulae, a = R₁·(1-(( R₂ ²+2·R₁·R₃- R₃ ²)/(2· R₁·R₂))²)^1/2，

b=( R₂ ²-2·R₁·R₃+R₃ ²)/(2·R₂)。

Wherein R is₁Is the distance between the axis of the planetary roller and the axis of the rotor, R₂Radius of the rotor, R₃The first and the second in the outer contour line of the cross section of the working cavityAnd the radius of the third and fourth circular arc lines.

The planet roller is in running fit with the cavity groove in the cavity groove, two end faces of the planet roller are attached to two end faces of the cavity groove and two side faces of the groove, and air guide grooves are transversely formed in the curved surface of the planet roller corresponding to the ninth curve and the eleventh curve.

And when the rotor rotates, the four planetary rollers only do circular translation motion without rotation relative to the stator under the action of the planetary roller synchronous control mechanism.

Two fluid inlets and two fluid outlets which are communicated with the working cavity are formed in the stator, and through openings of the two fluid inlets in the inner wall of the stator are respectively positioned on one side of a curved surface of the inner wall of the stator corresponding to a third curve near a crest line of the inner wall of the stator corresponding to a connection point of a third curve and a fourth curve and on one side of a curved surface of the inner wall of the stator corresponding to a seventh curve near a crest line of the inner wall of the stator corresponding to a connection point of a seventh curve and an eighth curve; through holes of the two fluid outlets on the inner wall of the stator are respectively positioned on one side of the curved surface of the inner wall of the stator corresponding to a fourth curve near the edge line of the inner wall of the stator corresponding to the connection point of a third curve and the fourth curve and on one side of the curved surface of the inner wall of the stator corresponding to an eighth curve near the edge line of the inner wall of the stator corresponding to the connection point of a seventh curve and the eighth curve.

And when the two planetary rollers are positioned on the ordinate axis of a plane rectangular coordinate system taking the central point of the cross section of the rotor as the origin, the spaces formed between the curved surface of the planetary roller corresponding to the ninth curve and the curved surfaces of the inner walls of the stator corresponding to the first curve and the second curve, and the spaces formed between the curved surface of the planetary roller corresponding to the eleventh curve and the curved surfaces of the inner walls of the stator corresponding to the fifth curve and the sixth curve are communicated with the oil spray nozzle.

The utility model discloses a rotor engine, including the stator with be located the rotor of stator inner chamber, the rotor passes through the rotor shaft and rotatably supports the both ends at the stator, the rotor is cylindrical, it and stator inner chamber coaxial line normal running fit in stator inner chamber, on the cylindrical inner chamber wall with rotor normal running fit's stator, seted up flutedly along circumference, make and form airtight working chamber between stator and the rotor, the inner contour of this working chamber cross section is for using rotor axle center as the centre of a circle, rotor radius is the circle of radius, the outer contour of this working chamber cross section is the closed line that is formed by first circular arc line, the second circular arc line, the third circular arc line, the fourth circular arc line, first curve, the second curve, the third curve, the fourth curve, the fifth curve, the sixth curve, the seventh curve and the eighth curve connection; four cavity grooves are axially arranged on a cylindrical surface of the rotor, the four cavity grooves are uniformly arranged in the circumferential direction of the rotor, the contour line of the cross section of each cavity groove is an arc line, two end surfaces of each cavity groove are respectively flush with two side surfaces of the corresponding groove, a planetary roller is arranged in each cavity groove, the planetary rollers are rotatably supported at two ends of the rotor through a roller shaft and are coaxial with the cavity grooves, the contour line of the cross section of the planetary roller is a closed line formed by connecting a fifth arc line, a sixth arc line, a seventh arc line, an eighth arc line, a ninth curve, a tenth curve, an eleventh curve and a twelfth curve, the closed line is a figure which is centrosymmetric about the central point of the cross section of the planetary roller, and is also a rotationally symmetric figure which takes the central point as a rotationally symmetric center and has a rotation angle of 90 degrees, in a plane right-angle coordinate system which takes the central point as the origin, the ninth curve and the, the equation for the ninth curve is:

x²+( R₂-y)²- R₁ ²=0, wherein-a ≦ x ≦ a, (R)₂- R₁）≤y≤b。

The fifth circular arc line and the sixth circular arc line as well as the seventh circular arc line and the eighth circular arc line are respectively symmetrical relative to the ordinate axis, and the radius of the fifth circular arc line, the radius of the sixth circular arc line, the radius of the seventh circular arc line and the radius of the eighth circular arc line are consistent with the radius of the cross section contour line of the cavity groove and are R₃- R₁。

In the outer contour lines of the cross section of the working cavity, a first arc line is connected between a first curve and an eighth curve, a second arc line is connected between a second curve and a third curve, a third arc line is connected between a fourth curve and a fifth curve, a fourth arc line is connected between a sixth curve and a seventh curve, the first curve is connected with the second curve, the third curve is connected with the fourth curve, the fifth curve is connected with the sixth curve, the seventh curve is connected with the eighth curve, the first, second, third and fourth arc lines are arc lines which take the axle center of a rotor as the center of a circle and take the radius of the rotor as the radius, the outer contour line of the cross section of the working cavity is a figure which is centrosymmetric about the center point of the cross section of the rotor, and is also a rotationally symmetric figure which takes the center point as the rotational symmetry center and has a rotation angle of 90 degrees, and in a plane right-angle coordinate system which takes the center point as the origin point, the first arc line and the second arc line, and the first curve and the second curve are respectively symmetrical relative to the ordinate axis, and the equation of the first curve is as follows:

（x-a）²+（y-b）²- R₁ ²=0, wherein 0 ≦ x ≦ a · R₃/（R₃- R₁），b·R₃/（R₃- R₁）≤y≤（R₁+b）。

The equation for the second curve is:

（x+a）²+（y-b）²- R₁ ²=0, wherein-a · R₃/（R₃- R₁）≤x≤0，b·R₃/（R₃- R₁）≤y≤（R₁+b）。

In the above formulae, a = R₁·(1-(( R₂ ²+2·R₁·R₃- R₃ ²)/(2· R₁·R₂))²)^1/2，

b=( R₂ ²-2·R₁·R₃+R₃ ²)/(2·R₂)。

Wherein R is₁Is the distance between the axis of the planetary roller and the axis of the rotor, R₂Radius of the rotor, R₃The radius of a first arc line, a second arc line, a third arc line and a fourth arc line in the outer contour line of the cross section of the working cavity.

The planet roller is in running fit with the cavity groove in the cavity groove, two end faces of the planet roller are attached to two end faces of the cavity groove and two side faces of the groove, and air guide grooves are transversely formed in the curved surface of the planet roller corresponding to the ninth curve and the eleventh curve.

And when the rotor rotates, the four planetary rollers only do circular translation motion without rotation relative to the stator under the action of the planetary roller synchronous control mechanism.

Two fluid inlets and two fluid outlets which are communicated with the working cavity are formed in the stator, and through openings of the two fluid inlets in the inner wall of the stator are respectively positioned on one side of a curved surface of the inner wall of the stator corresponding to a third curve near a crest line of the inner wall of the stator corresponding to a connection point of a third curve and a fourth curve and on one side of a curved surface of the inner wall of the stator corresponding to a seventh curve near a crest line of the inner wall of the stator corresponding to a connection point of a seventh curve and an eighth curve; through holes of the two fluid outlets on the inner wall of the stator are respectively positioned on one side of the curved surface of the inner wall of the stator corresponding to a fourth curve near the edge line of the inner wall of the stator corresponding to the connection point of a third curve and the fourth curve and on one side of the curved surface of the inner wall of the stator corresponding to an eighth curve near the edge line of the inner wall of the stator corresponding to the connection point of a seventh curve and the eighth curve.

And when the two planetary rollers are positioned on the ordinate axis of a plane rectangular coordinate system taking the central point of the cross section of the rotor as the origin, the spaces formed between the curved surface of the planetary roller corresponding to the ninth curve and the curved surfaces of the inner walls of the stator corresponding to the first curve and the second curve, and the spaces formed between the curved surface of the planetary roller corresponding to the eleventh curve and the curved surfaces of the inner walls of the stator corresponding to the fifth curve and the sixth curve are communicated with the oil nozzle and the spark plug.

The planetary roller synchronous control mechanism comprises two central gears, four synchronous gears and four intermediate gears, the two central gears are respectively fixed at two ends of the stator and coaxial with the rotor, the synchronous gears are respectively fixed at one end of the roller shaft, the intermediate gears are rotatably arranged on the end face of the rotor and are respectively positioned between the central gears and the synchronous gears, and each intermediate gear is simultaneously meshed with one central gear and one synchronous gear.

Fluid energy conversion device owing to have this kind of structure, can realize the energy conversion of following mode smoothly:

firstly, after high-pressure fluid enters and exits through a fluid inlet and a fluid outlet, the high-pressure fluid can drive a rotor to rotate, so that the energy of the fluid is converted into output power (such as a steam turbine, a water turbine, a pneumatic motor and a hydraulic motor); and secondly, in the process that mechanical power drives the rotor to rotate through the rotor shaft, the volume of the working cavity is changed, fluid enters the working cavity from the fluid inlet under the action of negative pressure and is discharged from the fluid outlet under the pushing action of the planetary rollers, and therefore mechanical energy is converted into fluid kinetic energy to achieve fluid conveying (such as a compressor, a hydraulic pump, a vacuum pump and a blower). The fluid energy conversion device realizes energy conversion through the change of the volume of fluid, has simple structure, good fluid sealing performance and high energy conversion efficiency, and the rotor rotates coaxially relative to the inner cavity of the stator, so the vibration and the noise are low.

Rotor engine realizes energy conversion through gaseous volumetric change, its simple structure, and gaseous leakproofness is good, and energy conversion efficiency is high. The rotor rotates coaxially relative to the inner cavity of the stator, vibration and noise are low, the lubricating oil channel and the cooling liquid channel are favorably arranged, and the rotor and the planetary roller can be reliably lubricated and cooled. In the rotation process of the rotor, the eight vertex angle crest lines of the planetary rollers are only contacted with the curved surfaces corresponding to the first, second, third, fourth, fifth, sixth, seventh and eighth curves of the inner wall of the stator respectively, so the abrasion of the planetary rollers is small. The rotor engine can easily realize high compression ratio, greatly improve combustion efficiency and develop various high-performance rotor engines.

Drawings

Fig. 1 is a schematic sectional view along the rotor shaft according to the present invention.

Fig. 2 is a schematic view (fluid energy conversion device) taken at 45 ° of the cross-section of fig. 1 along line a-a.

Fig. 3 is a schematic view of fig. 1 taken along line a-a at 45 ° rotation (compression ignition rotary engine).

Fig. 4 is a schematic view of a cross section taken along line a-a of fig. 1 rotated 45 ° (spark plug ignition rotary engine).

Fig. 5 is a schematic cross-sectional view taken along line C-C in fig. 1.

Fig. 6 to 10 are schematic views illustrating a process in which the rotor is rotated by 90 ° clockwise within the stator in the fluid energy conversion device shown in fig. 2.

Fig. 11 to 15 are schematic views illustrating a process in which the rotor is rotated by 90 ° clockwise within the stator in the rotary engine shown in fig. 3.

Fig. 16 to 20 are schematic views illustrating a process of rotating the rotor within the stator by 90 ° clockwise in the rotary engine shown in fig. 4.

Fig. 21 is a schematic cross-sectional contour line view of the stator, rotor and planetary rollers of the present invention when the planetary rollers are on the ordinate axis.

Fig. 22 is a schematic cross-sectional view of planetary rollers in a fluid energy conversion device.

FIG. 23 is a schematic cross-sectional view of a planetary roller in a rotary engine.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example 1:

as shown in fig. 1 and 2, the fluid energy conversion device comprises a stator 1 and a rotor 6 positioned in an inner cavity of the stator 1, wherein the rotor 6 is rotatably supported at two ends of the stator 1 through a rotor shaft 7, the rotor 6 is cylindrical, the rotor 6 is coaxially and rotatably matched with the inner cavity of the stator 1 in the inner cavity of the stator 1, a groove 9 is formed in the cylindrical inner cavity wall of the stator 1 rotatably matched with the rotor 6 along the circumferential direction, so that a closed working cavity 12 is formed between the stator 1 and the rotor 6, the inner contour line of the cross section of the working cavity 12 is a circle with the axis of the rotor 6 as the center and the radius of the rotor 6 as the radius, and the outer contour line of the cross section of the working cavity 12 is a circle formed by a first arc line 27, a second arc line 18, a third arc line 21, a fourth arc line 24, a first curve 16, a second curve 17, a third curve 19, a fourth curve 20, a fifth curve 22, a sixth curve 23, a third, A closed line formed by connecting the seventh curve 25 and the eighth curve 26.

As shown in fig. 21, the first arc line 27 is an arc line B₁B₈The second circular arc line 18 is a circular arc line B₂B₃The third arc line 21 is a B arc line₄B₅Of 1 atThe four arc lines 24 are arc lines B₆B₇The first curve 16 is a curve M₁B₁The second curve 17 is the curve M₁B₂The third curve 19 is the curve M₂B₃The fourth curve 20 is the curve M₂B₄The fifth curve 22 is the curve M₃B₅The sixth curve 23 is the curve M₃B₆The seventh curve 25 is the curve M₄B₇The eighth curve 26 is the curve M₄B₈。

Four cavity grooves 13 are axially formed in the cylindrical surface of the rotor 6, the four cavity grooves 13 are uniformly arranged in the circumferential direction of the rotor 4, the outline of the cross section of each cavity groove 13 is an arc line, two end faces of each cavity groove 13 are respectively flush with two side faces of the corresponding groove 9, planetary rollers 8 are arranged in the cavity grooves 13, the planetary rollers 8 are rotatably supported at two ends of the rotor 6 through the roller shafts 2, and the planetary rollers 8 and the cavity grooves 13 are coaxial.

As shown in fig. 21 and 22, the outline of the cross section of the planetary roller 8 is a closed line formed by connecting a fifth circular arc line 35, a sixth circular arc line 29, a seventh circular arc line 31, an eighth circular arc line 33, a ninth curved line 28, a tenth curved line 30, an eleventh curved line 32, and a twelfth curved line 34, and the fifth circular arc line 35 is a circular arc line D₁D₈The sixth circular arc line 29 is a circular arc line D₂D₃The seventh circular arc line 31 is a circular arc line D₄D₅The eighth circular arc line 33 is a circular arc line D₆D₇The ninth curve 28 is the curve D₁D₂The tenth curve 30 is a curve D₃D₄The eleventh curve 32 is the curve D₅D₆The twelfth curve 34 is a curve D₇D₈The contour line is a figure which is centrosymmetric with respect to the center point of the cross section of the planetary roller 8, and is also a rotationally symmetric figure which has the center point as a rotationally symmetric center and a rotation angle of 90 °.

In a plane rectangular coordinate system with the center point of the cross section of the star roller 8 as the origin (the horizontal dotted line in fig. 22 is the abscissa axis, and the vertical dotted line is the ordinate axis), the ninth curve 28 and the eleventh curve 32 are symmetrical with respect to the abscissa axis, and the equation of the ninth curve 28 is:

x²+( R₂-y)²- R₁ ²=0, wherein-a ≦ x ≦ a, (R)₂- R₁）≤y≤b。

The fifth circular arc line 35 and the sixth circular arc line 29, and the seventh circular arc line 31 and the eighth circular arc line 33 are respectively symmetrical relative to the ordinate axis, and the radiuses of the fifth, sixth, seventh and eighth circular arc lines (35, 29, 31 and 33) are consistent with the radius of the cross section contour line of the cavity groove and are R₃- R₁。

As shown in fig. 21, in the outer contour line of the cross section of the working chamber 12, a first circular arc line 27 is connected between the first curve 16 and the eighth curve 26, and two end points of the first circular arc line 27 are B₁Points and B₈Point; the second arc line 18 is connected between the second curve 17 and the third curve 19, and two end points of the second arc line 18 are B₂Points and B₃Point; the third arc line 21 is connected between the fourth curve 20 and the fifth curve 22, and two end points of the third arc line 21 are B₄Points and B₅Point; a fourth arc line 24 is connected between the sixth curve 23 and the seventh curve 25, and two end points of the fourth arc line 24 are B₆Points and B₇And (4) point.

The first curve 16 and the second curve 17 are connected to M₁At a point, a third curve 19 and a fourth curve 20 are connected to M₂At the point, the fifth curve 22 and the sixth curve 23 are connected to M₃Point, the seventh curve 25 and the eighth curve 26 are connected to M₄The first, second, third, and fourth arc lines 27, 18, 21, and 24 are arc lines having the axis of the rotor 6 as the center of a circle, and the outer contour line of the cross section of the working chamber 12 is a figure having central symmetry with respect to the center point of the cross section of the rotor 6, and is also a figure having rotational symmetry with the center point as the rotational symmetry center and a rotation angle of 90 °.

In a rectangular plane coordinate system with the center point of the cross section of the rotor 6 as the origin (the horizontal dotted line in fig. 21 is the abscissa axis, and the vertical dotted line is the ordinate axis), the first arc line 27 and the second arc line 18, and the first curve 16 and the second curve 17 are respectively symmetrical with respect to the ordinate axis, and the equation of the first curve 16 is:

（x-a）²+（y-b）²- R₁ ²=0, wherein 0 ≦ x ≦ a · R₃/（R₃- R₁），b·R₃/（R₃- R₁）≤y≤（R₁+b）。

The equation for the second curve 21 is:

（x+a）²+（y-b）²- R₁ ²=0, wherein-a · R₃/（R₃- R₁）≤x≤0，b·R₃/（R₃- R₁）≤y≤（R₁+b）。

That is, the abscissa of the M1 point is 0 and the ordinate is R₂(ii) a The abscissa of the point B1 is a.R₃/（R₃- R₁) Ordinate is b.R₃/（R₃- R₁) (ii) a The abscissa of the point B2 is-a.R₃/（R₃- R₁) Ordinate is b.R₃/（R₃- R₁）。

In the above formulae, a = R₁·(1-(( R₂ ²+2·R₁·R₃- R₃ ²)/(2· R₁·R₂))²)^1/2，

b=( R₂ ²-2·R₁·R₃+R₃ ²)/(2·R₂)。

Wherein R is₁Is the distance between the axis of the planetary roller 8 and the axis of the rotor 6, R₂Radius of rotor 6, R₃The radii of the first, second, third and fourth circular arc lines 27, 18, 21 and 24 in the outer contour line of the cross section of the working cavity 12.

As shown in fig. 21 and 22, the ninth curve 28 is actually a connection point M between the first curve 16 and the second curve 17₁A tenth curve 30 is a connecting point M of the third curve 19 and the fourth curve 20 on a trajectory line drawn on the cross section of the planetary roller 8₂An eleventh curve 32 is a connecting point M of the fifth curve 22 and the sixth curve 23 on a trajectory line drawn on the cross section of the planetary roller 8₃A twelfth curve 34 which is a seventh curve 25 and an eighth curve26 point of attachment M₄A trajectory line drawn on the cross section of the planetary roller 8.

The first curve 16 is a connection point D of the ninth curve 28 and the fifth arc line 35₁A track line drawn on the bottom surface of the groove 9 of the stator 1, and a second curve 17 is a connection point D of a ninth curve 28 and a sixth arc 29₂A third curve 19 is a connecting point D of a tenth curve 30 and a sixth circular arc 29, and is a track line drawn on the bottom surface of the groove 9 of the stator 1₃A fourth curve 20 is a connecting point D of a tenth curve 30 and a seventh circular arc line 31 on a track line drawn on the bottom surface of the groove 9 of the stator 1₄A fifth curve 22 is a connecting point D of an eleventh curve 32 and a seventh arc line 31 on a track line drawn on the bottom surface of the groove 9 of the stator 1₅A track line drawn on the bottom surface of the groove 9 of the stator 1, and a sixth curve 23 is a connection point D of an eleventh curve 32 and an eighth arc 33₆A seventh curve 25 is a connecting point D of a twelfth curve 34 and an eighth circular arc line 33₇An eighth curve 26 is a connecting point D of the twelfth curve 34 and the fifth circular arc line 35 on a track line drawn on the bottom surface of the groove 9 of the stator 1₈A track line drawn on the bottom surface of said groove 9 of the stator 1.

The planetary rollers 8 are in running fit with the cavity grooves in the cavity grooves 13, and two end faces of the planetary rollers 8 are attached to two end faces of the cavity grooves 13 and two side faces of the grooves 9.

As shown in fig. 1 and 5, a planetary roller synchronization control mechanism is provided on the end face side of the rotor 6, and includes two sun gears 3, four synchronization gears 5 and four intermediate gears 4, the two sun gears are respectively fixed at both ends of the stator 1 and are coaxial with the rotor 6, the synchronization gears are respectively fixed at one end of the roller shaft 2, the intermediate gears are rotatably installed on the end face of the rotor and are respectively located between the sun gears and the synchronization gears, and each intermediate gear is simultaneously meshed with one sun gear and one synchronization gear. When the rotor 6 rotates, under the action of the planetary roller synchronous control mechanism, the four planetary rollers 8 do only do circular translational motion without rotation relative to the stator 1. Or, under the action of the planetary roller synchronous control mechanism, the four planetary rollers 8 rotate in the same rotating speed and opposite directions relative to the rotor 6.

As shown in fig. 2, four fluid inlets 11 and four fluid outlets 10 communicated with the working chamber 12 are formed in the stator 1, through openings of the four fluid inlets 11 in the inner wall of the stator are respectively located on curved surfaces of the inner wall of the stator corresponding to first, third, fifth and seventh curves (16, 19, 22 and 25), and through openings of the four fluid outlets 10 in the inner wall of the stator are respectively located on curved surfaces of the inner wall of the stator corresponding to second, fourth, sixth and eighth curves (17, 20, 23 and 26).

A set of fluid inlet 11 and fluid outlet 10 located on the curved surface of the inner wall of the stator corresponding to the first curve 16 and the second curve 17, a set of fluid inlet and fluid outlet located on the curved surface of the inner wall of the stator corresponding to the third curve 19 and the fourth curve 20, a set of fluid inlet and fluid outlet located on the curved surface of the inner wall of the stator corresponding to the fifth curve 22 and the sixth curve 23, and a set of fluid inlet and fluid outlet located on the curved surface of the inner wall of the stator corresponding to the seventh curve 25 and the eighth curve 26 can be simultaneously covered by the curved surfaces of the planetary rollers corresponding to the ninth curve 28, the tenth curve 30, the eleventh curve 32 and the twelfth curve 34, respectively, at this time, no direct communication can be made between the four fluid inlets 11 and the four fluid outlets 10, and fluid leakage caused by the direct communication of the fluid inlets and the fluid outlets can be avoided (the through-holes of the four fluid inlets 11 and the four fluid outlets 10 on the inner wall of the stator can also be located on the inner When the rotor 6 rotates until the edge line of the inner wall of the stator contacts with the curved surface of the planetary roller corresponding to the ninth curve 28, the tenth curve 30, the eleventh curve 32 and the twelfth curve 34, that is, the position shown in fig. 6 and the position near the position, the four fluid inlets 11 and the four fluid outlets 10 can be simultaneously and respectively communicated with the eight closed spaces formed between the curved surface of the planetary roller and the inner wall of the stator).

Fig. 6 to 10 show the state of the rotor 6 during a 90 ° clockwise rotation in the stator 1, and in connection with fig. 21, during a one-turn rotation of the rotor 6 in the stator 1, D₁The vertex angle crest line of the planet roller 8 corresponding to the point is only the first curveCurved contact of the inner wall of the stator 1 corresponding to the line 16, D₂The vertex angle crest line of the planet roller 8 corresponding to the point is only contacted with the curved surface of the inner wall of the stator 1 corresponding to the second curve 17, D₃The vertex angle crest line of the planet roller 8 corresponding to the point is only contacted with the curved surface of the inner wall of the stator 1 corresponding to the third curve 19, D₄The vertex angle crest line of the planet roller 8 corresponding to the point is only contacted with the curved surface of the inner wall of the stator 1 corresponding to the fourth curve 20, D₅The vertex angle crest line of the planet roller 8 corresponding to the point is only contacted with the curved surface of the inner wall of the stator 1 corresponding to the fifth curve 22, D₆The vertex angle crest line of the planet roller 8 corresponding to the point is only contacted with the curved surface of the inner wall of the stator 1 corresponding to the sixth curve 23, D₇The vertex angle crest line of the planet roller 8 corresponding to the point is only contacted with the curved surface of the inner wall of the stator 1 corresponding to the seventh curve 25, D₈The vertex angle crest line of the planetary roller 8 corresponding to the point contacts only the curved surface of the inner wall of the stator 1 corresponding to the eighth curve 26.

The arc surface of the planetary roller 8 corresponding to the fifth arc line 35 is only in contact with the arc surface of the inner wall of the stator 1 corresponding to the first arc line 27, the arc surface of the planetary roller 8 corresponding to the sixth arc line 29 is only in contact with the arc surface of the inner wall of the stator 1 corresponding to the second arc line 18, the arc surface of the planetary roller 8 corresponding to the seventh arc line 31 is only in contact with the arc surface of the inner wall of the stator 1 corresponding to the third arc line 21, and the arc surface of the planetary roller 8 corresponding to the eighth arc line 33 is only in contact with the arc surface of the inner wall of the stator 1 corresponding to the fourth arc line 24.

M₁The inner wall ridge of the stator 1 corresponding to the point is contacted with the cylindrical surface of the rotor 6 and also contacted with the curved surface of the planet roller 8 corresponding to the ninth curve 28, M₂The inner wall ridge of the stator 1 corresponding to the point is contacted with the cylindrical surface of the rotor 6 and also contacted with the curved surface of the planetary roller 8 corresponding to the tenth curve 30, M₃The inner wall ridge of the stator 1 corresponding to the point is contacted with the cylindrical surface of the rotor 6 and also contacted with the curved surface of the planetary roller 8 corresponding to the eleventh curve 32, M₄The inner wall ridge of the stator 1 corresponding to the point is in contact with the cylindrical surface of the rotor 6 and also in contact with the curved surface of the planetary roller 8 corresponding to the twelfth curve 34.

As shown in fig. 6, when two of the planetary rollers 8 are located at the highest and lowest positions in the stator 1, respectively, at this time, the four sets of the fluid inlets 11 and the fluid outlets 10 are simultaneously covered by the curved surfaces of the planetary rollers corresponding to the ninth curve 28, the tenth curve 30, the eleventh curve 32 and the twelfth curve 34, respectively, and none of the four fluid inlets 11 and the four fluid outlets 10 can communicate with the working chamber 12.

After the high-pressure fluid enters the inner cavity of the stator 1 through the four fluid inlets 11, the high-pressure fluid applies pressure to the four planetary rollers 8, so that the rotor 6 is driven to rotate. As shown in fig. 6 to 10, during the rotation of the rotor 6, the four planetary rollers 8 continuously press the fluid in the working chamber 12 out of the four fluid outlets 10, so as to convert the energy of the fluid into output power, such as a steam turbine, a water turbine, a pneumatic motor, a hydraulic motor, and the like.

When the rotor 6 is driven by the mechanical power through the rotor shaft 7 to rotate, the volume of the working chamber 12 changes, as shown in fig. 6 to 10, fluid enters the working chamber 12 from the four fluid inlets 11 under the action of negative pressure and is discharged from the four fluid outlets 10 under the pushing action of the planetary rollers 8, so that the mechanical energy is converted into the kinetic energy of the fluid to realize the fluid transportation, such as a compressor, a hydraulic pump, a vacuum pump, a blower and the like.

Example 2:

as shown in fig. 1 and 3, the rotor engine (compression ignition type) includes a stator 1 and a rotor 6 located in an inner cavity of the stator 1, the rotor 6 is rotatably supported at two ends of the stator 1 through a rotor shaft 7, the rotor 6 is cylindrical, and is coaxially and rotatably matched with the inner cavity of the stator 1 in the inner cavity of the stator 1, a groove 9 is formed on the wall of the cylindrical inner cavity of the stator 1 rotatably matched with the rotor 6 along the circumferential direction, so that a closed working cavity 12 is formed between the stator 1 and the rotor 6, the inner contour line of the cross section of the working cavity 12 is a circle with the axis of the rotor 6 as the center and the radius of the rotor 6 as the radius, and the outer contour line of the cross section of the working cavity 12 is a circle formed by a first arc line 27, a second arc line 18, a third arc line 21, a fourth arc line 24, a first curve 16, a second curve 17, a third curve 19, a fourth curve 20, a fifth curve 22, a sixth curve 23, a closed line formed by connecting the seventh curve 25 and the eighth curve 26.

As shown in fig. 21, the first arc line 27 is an arc line B₁B₈The second circular arc line 18 is a circular arc line B₂B₃The third arc line 21 is a B arc line₄B₅The fourth arc line 24 is an arc line B₆B₇The first curve 16 is a curve M₁B₁The second curve 17 is the curve M₁B₂The third curve 19 is the curve M₂B₃The fourth curve 20 is the curve M₂B₄The fifth curve 22 is the curve M₃B₅The sixth curve 23 is the curve M₃B₆The seventh curve 25 is the curve M₄B₇The eighth curve 26 is the curve M₄B₈。

Four cavity grooves 13 are axially formed in the cylindrical surface of the rotor 6, the four cavity grooves 13 are uniformly arranged in the circumferential direction of the rotor 4, the outline of the cross section of each cavity groove 13 is an arc line, two end faces of each cavity groove 13 are respectively flush with two side faces of the corresponding groove 9, planetary rollers 8 are arranged in the cavity grooves 13, the planetary rollers 8 are rotatably supported at two ends of the rotor 6 through the roller shafts 2, and the planetary rollers 8 and the cavity grooves 13 are coaxial.

As shown in fig. 21 and 23, the outline of the cross section of the planetary roller 8 is a closed line formed by connecting a fifth circular arc line 35, a sixth circular arc line 29, a seventh circular arc line 31, an eighth circular arc line 33, a ninth curved line 28, a tenth curved line 30, an eleventh curved line 32, and a twelfth curved line 34, and the fifth circular arc line 35 is a circular arc line D₁D₈The sixth circular arc line 29 is a circular arc line D₂D₃The seventh circular arc line 31 is a circular arc line D₄D₅The eighth circular arc line 33 is a circular arc line D₆D₇The ninth curve 28 is the curve D₁D₂The tenth curve 30 is a curve D₃D₄The eleventh curve 32 is the curve D₅D₆The twelfth curve 34 is a curve D₇D₈The contour line is a figure which is centrosymmetric with respect to the center point of the cross section of the planetary roller 8, and is also a rotationally symmetric figure which has the center point as a rotationally symmetric center and a rotation angle of 90 °.

In a plane rectangular coordinate system with the center point of the cross section of the planetary roller 8 as the origin (the horizontal dotted line in fig. 23 is the abscissa axis, and the vertical dotted line is the ordinate axis), the ninth curve 28 and the eleventh curve 32 are symmetrical with respect to the abscissa axis, and the equation of the ninth curve 28 is:

x²+( R₂-y)²- R₁ ²=0, wherein-a ≦ x ≦ a, (R)₂- R₁）≤y≤b。

The fifth circular arc line 35 and the sixth circular arc line 29, and the seventh circular arc line 31 and the eighth circular arc line 33 are respectively symmetrical relative to the ordinate axis, and the radiuses of the fifth, sixth, seventh and eighth circular arc lines (35, 29, 31 and 33) are consistent with the radius of the cross section contour line of the cavity groove and are R₃- R₁。

As shown in fig. 21, in the outer contour line of the cross section of the working chamber 12, a first circular arc line 27 is connected between the first curve 16 and the eighth curve 26, and two end points of the first circular arc line 27 are B₁Points and B₈Point; the second arc line 18 is connected between the second curve 17 and the third curve 19, and two end points of the second arc line 18 are B₂Points and B₃Point; the third arc line 21 is connected between the fourth curve 20 and the fifth curve 22, and two end points of the third arc line 21 are B₄Points and B₅Point; a fourth arc line 24 is connected between the sixth curve 23 and the seventh curve 25, and two end points of the fourth arc line 24 are B₆Points and B₇And (4) point.

The first curve 16 and the second curve 17 are connected to M₁At a point, a third curve 19 and a fourth curve 20 are connected to M₂At the point, the fifth curve 22 and the sixth curve 23 are connected to M₃Point, the seventh curve 25 and the eighth curve 26 are connected to M₄The first, second, third, and fourth arc lines 27, 18, 21, and 24 are arc lines having the axis of the rotor 6 as the center of a circle, and the outer contour line of the cross section of the working chamber 12 is a figure having central symmetry with respect to the center point of the cross section of the rotor 6, and is also a figure having rotational symmetry with the center point as the rotational symmetry center and a rotation angle of 90 °.

In a rectangular plane coordinate system with the center point of the cross section of the rotor 6 as the origin (the horizontal dotted line in fig. 21 is the abscissa axis, and the vertical dotted line is the ordinate axis), the first arc line 27 and the second arc line 18, and the first curve 16 and the second curve 17 are respectively symmetrical with respect to the ordinate axis, and the equation of the first curve 16 is:

（x-a）²+（y-b）²- R₁ ²=0, wherein 0 ≦ x ≦ a · R₃/（R₃- R₁），b·R₃/（R₃- R₁）≤y≤（R₁+b）。

The equation for the second curve 21 is:

（x+a）²+（y-b）²- R₁ ²=0, wherein-a · R₃/（R₃- R₁）≤x≤0，b·R₃/（R₃- R₁）≤y≤（R₁+b）。

That is, the abscissa of the M1 point is 0 and the ordinate is R₂(ii) a The abscissa of the point B1 is a.R₃/（R₃- R₁) Ordinate is b.R₃/（R₃- R₁) (ii) a The abscissa of the point B2 is-a.R₃/（R₃- R₁) Ordinate is b.R₃/（R₃- R₁）。

In the above formulae, a = R₁·(1-(( R₂ ²+2·R₁·R₃- R₃ ²)/(2· R₁·R₂))²)^1/2，

b=( R₂ ²-2·R₁·R₃+R₃ ²)/(2·R₂)。

Wherein R is₁Is the distance between the axis of the planetary roller 8 and the axis of the rotor 6, R₂Radius of rotor 6, R₃The radii of the first, second, third and fourth circular arc lines 27, 18, 21 and 24 in the outer contour line of the cross section of the working cavity 12.

As shown in FIG. 21, the ninth curve 28 is actually the connection point M of the first curve 16 and the second curve 17₁A tenth curve 30 is a connecting point M of the third curve 19 and the fourth curve 20 on a trajectory line drawn on the cross section of the planetary roller 8₂An eleventh curve 32 is a fifth curve 22 and a sixth curve 2 drawn on the cross section of the planetary roller 83 point of attachment M₃A twelfth curve 34 is a connecting point M of the seventh curve 25 and the eighth curve 26 on a trajectory line drawn on the cross section of the planetary roller 8₄A trajectory line drawn on the cross section of the planetary roller 8.

The first curve 16 is a connection point D of the ninth curve 28 and the fifth arc line 35₁A track line drawn on the bottom surface of the groove 9 of the stator 1, and a second curve 17 is a connection point D of a ninth curve 28 and a sixth arc 29₂A third curve 19 is a connecting point D of a tenth curve 30 and a sixth circular arc 29, and is a track line drawn on the bottom surface of the groove 9 of the stator 1₃A track line drawn on the bottom surface of the groove 9 of the stator 1; the fourth curve 20 is a connection point D of the tenth curve 30 and the seventh arc line 31₄A fifth curve 22 is a connecting point D of an eleventh curve 32 and a seventh arc line 31 on a track line drawn on the bottom surface of the groove 9 of the stator 1₅A track line drawn on the bottom surface of the groove 9 of the stator 1, and a sixth curve 23 is a connection point D of an eleventh curve 32 and an eighth arc 33₆A seventh curve 25 is a connecting point D of a twelfth curve 34 and an eighth circular arc line 33₇An eighth curve 26 is a connecting point D of the twelfth curve 34 and the fifth circular arc line 35 on a track line drawn on the bottom surface of the groove 9 of the stator 1₈A track line drawn on the bottom surface of said groove 9 of the stator 1.

The planetary roller 8 is matched with the cavity groove in the cavity groove 13 in a rotating way, two end faces of the planetary roller 8 are attached to two end faces of the cavity groove 13 and two side faces of the groove 9, an air guide groove 36 is transversely arranged on the curved surface of the planetary roller 8 corresponding to the ninth curve 28 and the eleventh curve 32, when the two planetary rollers 8 are located on the ordinate axis of the rectangular plane coordinate system with the central point of the cross section of the rotor 6 as the origin (i.e. the position shown in fig. 11 and the position near the same), the air guide groove 36 on the curved surface of the planetary roller 8 corresponding to the ninth curve 28 can communicate the two closed spaces, one of the closed spaces is a space formed between the curved surface of the planetary roller 8 corresponding to the ninth curve 28 and the inner wall of the stator 1 corresponding to the curved surface of the inner wall of the stator 1 corresponding to the first curve 16, and the other closed space is a space formed between the curved surface of the planetary roller 8 corresponding to the ninth curve 28 and the inner wall of the stator 1 corresponding to the curved surface of the inner wall of the stator 1 corresponding to the second curve 17. The air guide groove 36 on the curved surface of the planetary roller 8 corresponding to the eleventh curve 32 can communicate two closed spaces, wherein one closed space is a space formed between the curved surface of the planetary roller 8 corresponding to the eleventh curve 32 and the inner wall of the stator 1 of the curved surface of the inner wall of the stator 1 corresponding to the fifth curve 22, and the other closed space is a space formed between the curved surface of the planetary roller 8 corresponding to the eleventh curve 32 and the curved surface of the inner wall of the stator 1 corresponding to the sixth curve 23.

As shown in fig. 1 and 5, a planetary roller synchronization control mechanism is provided on the end face side of the rotor 6, and includes two sun gears 3, four synchronization gears 5 and four intermediate gears 4, the two sun gears are respectively fixed at both ends of the stator 1 and are coaxial with the rotor 6, the synchronization gears are respectively fixed at one end of the roller shaft 2, the intermediate gears are rotatably installed on the end face of the rotor and are respectively located between the sun gears and the synchronization gears, and each intermediate gear is simultaneously meshed with one sun gear and one synchronization gear. When the rotor 6 rotates, under the action of the planetary roller synchronous control mechanism, the four planetary rollers 8 do only do circular translational motion without rotation relative to the stator 1. Or, under the action of the planetary roller synchronous control mechanism, the four planetary rollers 8 rotate in the same rotating speed and opposite directions relative to the rotor 6.

As shown in fig. 3, two fluid inlets 11 and two fluid outlets 10 communicated with the working chamber 12 are formed in the stator 1, through holes of the two fluid inlets 11 in the inner wall of the stator 1 are respectively located on the curved surfaces of the inner wall of the stator corresponding to the third and seventh curves (19, 25), through holes of the two fluid outlets 10 in the inner wall of the stator 1 are respectively located on the curved surfaces of the inner wall of the stator corresponding to the fourth and eighth curves (20, 26) (the fluid inlets 11 and the fluid outlets 10 may also be formed in the end portions of the stator 1, refer to example 1). In this embodiment, the fluid inlet 11 is an air inlet, and the fluid outlet 10 is an exhaust outlet.

As shown in fig. 3, the oil nozzle 14 is installed on the stator 1, and the oil nozzle 14 is respectively located at a stator portion corresponding to the curved surface of the inner wall of the stator corresponding to the second curve 17 (or located at a stator portion corresponding to the curved surface of the inner wall of the stator corresponding to the first curve 16, or located at a stator portion corresponding to the curved surface of the inner wall of the stator corresponding to the first and second curves 16, 17, or located at an end portion of the stator 1), and a stator portion corresponding to the curved surface of the inner wall of the stator corresponding to the sixth curve 23 (or located at a stator portion corresponding to the curved surface of the inner wall of the stator corresponding to the fifth curve 22, or located at a stator portion corresponding to the curved surface of the inner wall of the stator corresponding to the fifth and sixth curves 22, 23, or located at an end portion of the stator 1).

When the axial centers of the two planetary rollers 8 are located on the ordinate axis of the planar rectangular coordinate system with the center point of the cross section of the rotor 6 as the origin (i.e., the position state shown in fig. 11), the space formed between the curved surface of the planetary roller 8 corresponding to the ninth curve 28 and the curved surface of the inner wall of the stator 1 corresponding to the first and second curves (16, 17) and the space formed between the curved surface of the planetary roller 8 corresponding to the eleventh curve 32 and the curved surface of the inner wall of the stator 1 corresponding to the fifth and sixth curves (22, 23) are communicated with the oil jet nozzle 14 (the axial centers of the two planetary rollers 8 may be located in the vicinity of the ordinate axis of the planar rectangular coordinate system with the center point of the cross section of the rotor 6 as the origin, i.e., the position state between the positions shown in fig. 11 to 12).

Fig. 11 to 15 show the state of the rotor 6 during the rotation of 90 ° in the clockwise direction in the stator 1, and in connection with fig. 21, during one rotation of the rotor 6 in the stator 1, D₁The vertex angle crest line of the planet roller 8 corresponding to the point is only contacted with the curved surface of the inner wall of the stator 1 corresponding to the first curve 16, D₂The vertex angle crest line of the planet roller 8 corresponding to the point is only contacted with the curved surface of the inner wall of the stator 1 corresponding to the second curve 17, D₃The vertex angle crest line of the planet roller 8 corresponding to the point is only contacted with the curved surface of the inner wall of the stator 1 corresponding to the third curve 19, D₄The vertex angle crest line of the planet roller 8 corresponding to the point is only contacted with the curved surface of the inner wall of the stator 1 corresponding to the fourth curve 20, D₅The vertex angle crest line of the planet roller 8 corresponding to the point is only contacted with the curved surface of the inner wall of the stator 1 corresponding to the fifth curve 22, D₆The vertex angle crest line of the planet roller 8 corresponding to the point is only corresponding to the curved surface of the inner wall of the stator 1 corresponding to the sixth curve 23Contact, D₇The vertex angle crest line of the planet roller 8 corresponding to the point is only contacted with the curved surface of the inner wall of the stator 1 corresponding to the seventh curve 25, D₈The vertex angle crest line of the planetary roller 8 corresponding to the point contacts only the curved surface of the inner wall of the stator 1 corresponding to the eighth curve 26.

The arc surface of the planetary roller 8 corresponding to the fifth arc line 35 is only in contact with the arc surface of the inner wall of the stator 1 corresponding to the first arc line 27, the arc surface of the planetary roller 8 corresponding to the sixth arc line 29 is only in contact with the arc surface of the inner wall of the stator 1 corresponding to the second arc line 18, the arc surface of the planetary roller 8 corresponding to the seventh arc line 31 is only in contact with the arc surface of the inner wall of the stator 1 corresponding to the third arc line 21, and the arc surface of the planetary roller 8 corresponding to the eighth arc line 33 is only in contact with the arc surface of the inner wall of the stator 1 corresponding to the fourth arc line 24.

M₁The inner wall ridge of the stator 1 corresponding to the point is contacted with the cylindrical surface of the rotor 6 and also contacted with the curved surface of the planet roller 8 corresponding to the ninth curve 28, M₂The inner wall ridge of the stator 1 corresponding to the point is contacted with the cylindrical surface of the rotor 6 and also contacted with the curved surface of the planetary roller 8 corresponding to the tenth curve 30, M₃The inner wall ridge of the stator 1 corresponding to the point is contacted with the cylindrical surface of the rotor 6 and also contacted with the curved surface of the planetary roller 8 corresponding to the eleventh curve 32, M₄The inner wall ridge of the stator 1 corresponding to the point is in contact with the cylindrical surface of the rotor 6 and also in contact with the curved surface of the planetary roller 8 corresponding to the twelfth curve 34.

As shown in fig. 11, when two planetary rollers 8 are respectively located at the highest position and the highest position in the stator 1, at this time, air is compressed to the extreme point in the sealed space between the planetary roller 8 located at the highest position in the stator 1 and the inner wall curved surface of the stator 1 corresponding to the first and second curves (16, 17), and in the sealed space between the planetary roller 8 located at the lowest position in the stator 1 and the inner wall curved surface of the stator 1 corresponding to the fifth and sixth curves (22, 23), after the oil nozzle 14 sprays fuel oil, the oil-gas mixed gas is subjected to compression ignition, the expansion gas pushes the planetary roller 8, and then the rotor 6 is driven to rotate in the stator 1 in the clockwise direction.

As shown in fig. 11 to 15, during the rotation of the rotor 6, the exhaust gas in the working chamber 12 on the side of the fluid outlet 10 is pushed out from the fluid outlet 10 by the planetary rollers 8, while the air in the working chamber 12 on the side of the fluid inlet is compressed by the planetary rollers 8, and at the same time, the air enters the working chamber 12 on the side of the fluid inlet 11 again under the negative pressure. The rotor 6 is in the stator 1 each time of one rotation, the oil-gas mixture gas is compression-ignited twice by four planetary rollers, and the rotor engine is a compression-ignition rotor engine without spark plugs.

Example 3:

as shown in fig. 1 and 4, the rotor engine (spark plug ignition type) comprises a stator 1 and a rotor 6 positioned in an inner cavity of the stator 1, wherein the rotor 6 is rotatably supported at two ends of the stator 1 through a rotor shaft 7, the rotor 6 is cylindrical, and is coaxially and rotatably matched with the inner cavity of the stator 1 in the inner cavity of the stator 1, a groove 9 is formed on the wall of the cylindrical inner cavity of the stator 1 which is rotatably matched with the rotor 6 along the circumferential direction, so that a closed working cavity 12 is formed between the stator 1 and the rotor 6, the inner contour line of the cross section of the working cavity 12 is a circle which takes the axial center of the rotor 6 as the center and the radius of the rotor 6 as the radius, and the outer contour line of the cross section of the working cavity 12 is a circle which is formed by a first arc line 27, a second arc line 18, a third arc line 21, a fourth arc line 24, a first curve 16, a second curve 17, a third curve 19, a fourth, A closed line formed by connecting the sixth curve 23, the seventh curve 25 and the eighth curve 26.

As shown in fig. 21, the first arc line 27 is an arc line B₁B₈The second circular arc line 18 is a circular arc line B₂B₃The third arc line 21 is a B arc line₄B₅The fourth arc line 24 is an arc line B₆B₇The first curve 16 is a curve M₁B₁The second curve 17 is the curve M₁B₂The third curve 19 is the curve M₂B₃The fourth curve 20 is the curve M₂B₄The fifth curve 22 is the curve M₃B₅The sixth curve 23 is the curve M₃B₆The seventh curve 25 is the curve M₄B₇The eighth curve 26 is the curve M₄B₈。

Four cavity grooves 13 are axially formed in the cylindrical surface of the rotor 6, the four cavity grooves 13 are uniformly arranged in the circumferential direction of the rotor 4, the outline of the cross section of each cavity groove 13 is an arc line, two end faces of each cavity groove 13 are respectively flush with two side faces of the corresponding groove 9, planetary rollers 8 are arranged in the cavity grooves 13, the planetary rollers 8 are rotatably supported at two ends of the rotor 6 through the roller shafts 2, and the planetary rollers 8 and the cavity grooves 13 are coaxial.

As shown in fig. 21 and 23, the outline of the cross section of the planetary roller 8 is a closed line formed by connecting a fifth circular arc line 35, a sixth circular arc line 29, a seventh circular arc line 31, an eighth circular arc line 33, a ninth curved line 28, a tenth curved line 30, an eleventh curved line 32, and a twelfth curved line 34, and the fifth circular arc line 35 is a circular arc line D₁D₈The sixth circular arc line 29 is a circular arc line D₂D₃The seventh circular arc line 31 is a circular arc line D₄D₅The eighth circular arc line 33 is a circular arc line D₆D₇The ninth curve 28 is the curve D₁D₂The tenth curve 30 is a curve D₃D₄The eleventh curve 32 is the curve D₅D₆The twelfth curve 34 is a curve D₇D₈The contour line is a figure which is centrosymmetric with respect to the center point of the cross section of the planetary roller 8, and is also a rotationally symmetric figure which has the center point as a rotationally symmetric center and a rotation angle of 90 °.

In a plane rectangular coordinate system with the center point of the cross section of the planetary roller 8 as the origin (the horizontal dotted line in fig. 23 is the abscissa axis, and the vertical dotted line is the ordinate axis), the ninth curve 28 and the eleventh curve 32 are symmetrical with respect to the abscissa axis, and the equation of the ninth curve 28 is:

x²+( R₂-y)²- R₁ ²=0, wherein-a ≦ x ≦ a, (R)₂- R₁）≤y≤b。

The fifth circular arc line 35 and the sixth circular arc line 29, and the seventh circular arc line 31 and the eighth circular arc line 33 are respectively symmetrical relative to the ordinate axis, and the radiuses of the fifth, sixth, seventh and eighth circular arc lines (35, 29, 31 and 33) are consistent with the radius of the cross section contour line of the cavity groove and are R₃- R₁。

As shown in fig. 21, the working chamber 12 has a cross sectionThe first arc line 27 is connected between the first curve 16 and the eighth curve 26, and two end points of the first arc line 27 are B₁Points and B₈Point; the second arc line 18 is connected between the second curve 17 and the third curve 19, and two end points of the second arc line 18 are B₂Points and B₃Point; the third arc line 21 is connected between the fourth curve 20 and the fifth curve 22, and two end points of the third arc line 21 are B₄Points and B₅Point; a fourth arc line 24 is connected between the sixth curve 23 and the seventh curve 25, and two end points of the fourth arc line 24 are B₆Points and B₇And (4) point.

The first curve 16 and the second curve 17 are connected to M₁At a point, a third curve 19 and a fourth curve 20 are connected to M₂At the point, the fifth curve 22 and the sixth curve 23 are connected to M₃Point, the seventh curve 25 and the eighth curve 26 are connected to M₄The first, second, third, and fourth arc lines 27, 18, 21, and 24 are arc lines having the axis of the rotor 6 as the center of a circle, and the outer contour line of the cross section of the working chamber 12 is a figure having central symmetry with respect to the center point of the cross section of the rotor 6, and is also a figure having rotational symmetry with the center point as the rotational symmetry center and a rotation angle of 90 °.

In a rectangular plane coordinate system with the center point of the cross section of the rotor 6 as the origin (the horizontal dotted line in fig. 21 is the abscissa axis, and the vertical dotted line is the ordinate axis), the first arc line 27 and the second arc line 18, and the first curve 16 and the second curve 17 are respectively symmetrical with respect to the ordinate axis, and the equation of the first curve 16 is:

（x-a）²+（y-b）²- R₁ ²=0, wherein 0 ≦ x ≦ a · R₃/（R₃- R₁），b·R₃/（R₃- R₁）≤y≤（R₁+b）。

The equation for the second curve 21 is:

（x+a）²+（y-b）²- R₁ ²=0, wherein-a · R₃/（R₃- R₁）≤x≤0，b·R₃/（R₃- R₁）≤y≤（R₁+b）。

That is, the abscissa of the M1 point is 0 and the ordinate is R₂(ii) a The abscissa of the point B1 is a.R₃/（R₃- R₁) Ordinate is b.R₃/（R₃- R₁) (ii) a The abscissa of the point B2 is-a.R₃/（R₃- R₁) Ordinate is b.R₃/（R₃- R₁）。

In the above formulae, a = R₁·(1-(( R₂ ²+2·R₁·R₃- R₃ ²)/(2· R₁·R₂))²)^1/2，

b=( R₂ ²-2·R₁·R₃+R₃ ²)/(2·R₂)。

Wherein R is₁Is the distance between the axis of the planetary roller 8 and the axis of the rotor 6, R₂Radius of rotor 6, R₃The radii of the first, second, third and fourth circular arc lines 27, 18, 21 and 24 in the outer contour line of the cross section of the working cavity 12.

As shown in FIG. 21, the ninth curve 28 is actually the connection point M of the first curve 16 and the second curve 17₁A tenth curve 30 is a connecting point M of the third curve 19 and the fourth curve 20 on a trajectory line drawn on the cross section of the planetary roller 8₂An eleventh curve 32 is a connecting point M of the fifth curve 22 and the sixth curve 23 on a trajectory line drawn on the cross section of the planetary roller 8₃A twelfth curve 34 is a connecting point M of the seventh curve 25 and the eighth curve 26 on a trajectory line drawn on the cross section of the planetary roller 8₄A trajectory line drawn on the cross section of the planetary roller 8.

The first curve 16 is a connection point D of the ninth curve 28 and the fifth arc line 35₁A track line drawn on the bottom surface of the groove 9 of the stator 1, and a second curve 17 is a connection point D of a ninth curve 28 and a sixth arc 29₂A third curve 19 is a connecting point D of a tenth curve 30 and a sixth circular arc 29, and is a track line drawn on the bottom surface of the groove 9 of the stator 1₃A fourth curve 20, a tenth curve 30 and a seventh circle, is drawn on the bottom surface of said groove 9 of the stator 1Connection point D of arc line 31₄A fifth curve 22 is a connecting point D of an eleventh curve 32 and a seventh arc line 31 on a track line drawn on the bottom surface of the groove 9 of the stator 1₅A track line drawn on the bottom surface of the groove 9 of the stator 1, and a sixth curve 23 is a connection point D of an eleventh curve 32 and an eighth arc 33₆A seventh curve 25 is a connecting point D of a twelfth curve 34 and an eighth circular arc line 33₇An eighth curve 26 is a connecting point D of the twelfth curve 34 and the fifth circular arc line 35 on a track line drawn on the bottom surface of the groove 9 of the stator 1₈A track line drawn on the bottom surface of said groove 9 of the stator 1.

The planetary rollers 8 are in running fit with the cavity grooves in the cavity grooves 13, and two end faces of the planetary rollers 8 are attached to two end faces of the cavity grooves 13 and two side faces of the grooves 9. Air guide grooves 36 are transversely formed in the curved surfaces of the planetary rollers 8 corresponding to the ninth curve 28 and the eleventh curve 32, when the two planetary rollers 8 are located on the ordinate axis of the rectangular plane coordinate system with the central point of the cross section of the rotor 6 as the origin (i.e., the position shown in fig. 16 and the position near the position), the air guide grooves 36 on the curved surfaces of the planetary rollers 8 corresponding to the ninth curve 28 can communicate two closed spaces, one of the closed spaces is a space formed between the curved surface of the planetary roller 8 corresponding to the ninth curve 28 and the inner wall of the stator 1 of the inner wall curved surface of the stator 1 corresponding to the first curve 16, and the other closed space is a space formed between the curved surface of the planetary roller 8 corresponding to the ninth curve 28 and the inner wall of the stator 1 of the inner wall curved surface of the stator 1 corresponding to the second curve 17. The air guide groove 36 on the curved surface of the planetary roller 8 corresponding to the eleventh curve 32 can communicate two closed spaces, wherein one closed space is a space formed between the curved surface of the planetary roller 8 corresponding to the eleventh curve 32 and the inner wall of the stator 1 of the curved surface of the inner wall of the stator 1 corresponding to the fifth curve 22, and the other closed space is a space formed between the curved surface of the planetary roller 8 corresponding to the eleventh curve 32 and the curved surface of the inner wall of the stator 1 corresponding to the sixth curve 23.

As shown in fig. 1 and 5, a planetary roller synchronization control mechanism is provided on the end face side of the rotor 6, and includes two sun gears 3, four synchronization gears 5 and four intermediate gears 4, the two sun gears are respectively fixed at both ends of the stator 1 and are coaxial with the rotor 6, the synchronization gears are respectively fixed at one end of the roller shaft 2, the intermediate gears are rotatably installed on the end face of the rotor and are respectively located between the sun gears and the synchronization gears, and each intermediate gear is simultaneously meshed with one sun gear and one synchronization gear. When the rotor 6 rotates, under the action of the planetary roller synchronous control mechanism, the four planetary rollers 8 do only do circular translational motion without rotation relative to the stator 1. Or, under the action of the planetary roller synchronous control mechanism, the four planetary rollers 8 rotate in the same rotating speed and opposite directions relative to the rotor 6.

As shown in fig. 4, two fluid inlets 11 and two fluid outlets 10 communicated with the working chamber 12 are formed on the stator 1, through holes of the two fluid inlets 11 on the inner wall of the stator 1 are respectively located on the curved surfaces of the inner wall of the stator corresponding to the third and seventh curves (19, 25), through holes of the two fluid outlets 10 on the inner wall of the stator 1 are respectively located on the curved surfaces of the inner wall of the stator corresponding to the fourth and eighth curves (20, 26) (the fluid inlets 11 and the fluid outlets 10 may also be formed at the end portions of the stator 1, refer to example 1). In this embodiment, the fluid inlet 11 is an air inlet, and the fluid outlet 10 is an exhaust outlet.

As shown in fig. 4, an oil nozzle 14 and a spark plug 15 are mounted on the stator 1, the oil nozzle 14 is respectively located at a stator portion corresponding to the curved surface of the inner wall of the stator corresponding to the second curve 17 (or located at a stator portion corresponding to the curved surface of the inner wall of the stator corresponding to the first curve 16, or located at a stator portion corresponding to the curved surface of the inner wall of the stator corresponding to the first and second curves 16, 17, or located at an end of the stator 1), and a stator portion corresponding to the curved surface of the inner wall of the stator corresponding to the sixth curve 23 (or located at a stator portion corresponding to the curved surface of the inner wall of the stator corresponding to the fifth curve 22, or located at a stator portion corresponding to the curved surface of the inner wall of the stator corresponding to the first and second curves 2, 23, or located at an end of the stator 1).

The spark plugs 15 are respectively located at the stator portion corresponding to the curved surface of the inner wall of the stator corresponding to the first curve 16 (or located at the stator portion corresponding to the curved surface of the inner wall of the stator corresponding to the second curve 17, or located at the stator portions corresponding to the curved surfaces of the inner walls of the stator corresponding to the first and second curves 16 and 17, or located at the end of the stator 1), and the stator portion corresponding to the curved surface of the inner wall of the stator corresponding to the fifth curve 22 (or located at the stator portion corresponding to the curved surface of the inner wall of the stator corresponding to the sixth curve 23, or located at the stator portions corresponding to the curved surfaces of the inner walls of the stator corresponding to the first and second curves 22 and 23, or located at the end of the stator 1).

When the axial centers of the two planetary rollers 8 are located on the ordinate axis of the rectangular planar coordinate system with the center point of the cross section of the rotor 6 as the origin (i.e., the position state shown in fig. 16), the space formed between the curved surface of the planetary roller 8 corresponding to the ninth curve 28 and the curved surface of the inner wall of the stator 1 corresponding to the first and second curves (16, 17), and the space formed between the curved surface of the planetary roller 8 corresponding to the eleventh curve 32 and the curved surface of the inner wall of the stator 1 corresponding to the fifth and sixth curves (22, 23) are communicated with the oil jet nozzle 14 and the spark plug 15 (the axial centers of the two planetary rollers 8 may also be located in the vicinity of the ordinate axis of the rectangular planar coordinate system with the center point of the cross section of the rotor 6 as the origin, i.e., the position state between the positions shown in fig. 16 to 17).

Fig. 16 to 20 show the state of the rotor 6 during the rotation of 90 ° clockwise in the stator 1, and with reference to fig. 21, during one rotation of the rotor 6 within the stator 1, D₁The vertex angle crest line of the planet roller 8 corresponding to the point is only contacted with the curved surface of the inner wall of the stator 1 corresponding to the first curve 16, D₂The vertex angle crest line of the planet roller 8 corresponding to the point is only contacted with the curved surface of the inner wall of the stator 1 corresponding to the second curve 17, D₃The vertex angle crest line of the planet roller 8 corresponding to the point is only contacted with the curved surface of the inner wall of the stator 1 corresponding to the third curve 19, D₄The vertex angle crest line of the planet roller 8 corresponding to the point is only contacted with the curved surface of the inner wall of the stator 1 corresponding to the fourth curve 20, D₅The vertex angle crest line of the planet roller 8 corresponding to the point is only contacted with the curved surface of the inner wall of the stator 1 corresponding to the fifth curve 22, D₆The vertex angle ridge of the planetary roller 8 corresponding to the point corresponds to only the sixth curve 23Stator 1 inner wall curved surface contact, D₇The vertex angle crest line of the planet roller 8 corresponding to the point is only contacted with the curved surface of the inner wall of the stator 1 corresponding to the seventh curve 25, D₈The vertex angle crest line of the planetary roller 8 corresponding to the point contacts only the curved surface of the inner wall of the stator 1 corresponding to the eighth curve 26.

The arc surface of the planetary roller 8 corresponding to the fifth arc line 35 is only in contact with the arc surface of the inner wall of the stator 1 corresponding to the first arc line 27, the arc surface of the planetary roller 8 corresponding to the sixth arc line 29 is only in contact with the arc surface of the inner wall of the stator 1 corresponding to the second arc line 18, the arc surface of the planetary roller 8 corresponding to the seventh arc line 31 is only in contact with the arc surface of the inner wall of the stator 1 corresponding to the third arc line 21, and the arc surface of the planetary roller 8 corresponding to the eighth arc line 33 is only in contact with the arc surface of the inner wall of the stator 1 corresponding to the fourth arc line 24.

M₁The inner wall ridge of the stator 1 corresponding to the point is contacted with the cylindrical surface of the rotor 6 and also contacted with the curved surface of the planet roller 8 corresponding to the ninth curve 28, M₂The inner wall ridge of the stator 1 corresponding to the point is contacted with the cylindrical surface of the rotor 6 and also contacted with the curved surface of the planetary roller 8 corresponding to the tenth curve 30, M₃The inner wall ridge of the stator 1 corresponding to the point is contacted with the cylindrical surface of the rotor 6 and also contacted with the curved surface of the planetary roller 8 corresponding to the eleventh curve 32, M₄The inner wall ridge of the stator 1 corresponding to the point is in contact with the cylindrical surface of the rotor 6 and also in contact with the curved surface of the planetary roller 8 corresponding to the twelfth curve 34.

As shown in fig. 16, when two planetary rollers 8 are respectively located at the highest and lowest positions in the stator 1, the air is compressed to the extreme point in the sealed space between the planetary roller 8 located at the highest position in the stator 1 and the inner wall curved surface of the stator 1 corresponding to the first and second curves (16, 17), and the sealed space between the planetary roller 8 located at the lowest position in the stator 1 and the inner wall curved surface of the stator 1 corresponding to the fifth and sixth curves (22, 23), the oil nozzle 14 sprays fuel oil, the spark plug 15 ignites, the oil-gas mixture is ignited, the expanding gas pushes the planetary roller 8, and then the rotor 6 is driven to rotate clockwise in the stator 1.

As shown in fig. 16 to 20, during the rotation of the rotor 6, the exhaust gas in the working chamber 12 on the side of the fluid outlet 10 is pushed out from the fluid outlet 10 by the planetary rollers 8, while the air in the working chamber 12 on the side of the fluid inlet 11 is compressed by the planetary rollers 8, and at the same time, the air enters the working chamber 12 on the side of the fluid inlet 11 again under the negative pressure. The oil-gas mixture is compression-ignited twice by the four planetary rollers for each rotation of the rotor 6 in the stator 1, and the rotor engine is a spark-ignition rotor engine.

Claims (14)

1. A fluid energy conversion device comprising a stator (1) and a rotor (6) located in an inner cavity of the stator, the rotor being rotatably supported at both ends of the stator by a rotor shaft (7), characterized in that: the rotor is cylindrical, the rotor is coaxially and rotatably matched with the inner cavity of the stator in the inner cavity of the stator, a groove (9) is formed in the wall of the cylindrical inner cavity of the stator rotatably matched with the rotor along the circumferential direction, so that a closed working cavity (12) is formed between the stator and the rotor, the inner contour line of the cross section of the working cavity is a circle which takes the axis of the rotor as the center of the circle and the radius of the rotor as the radius, and the outer contour line of the cross section of the working cavity is a closed line formed by connecting a first arc line (27), a second arc line (18), a third arc line (21), a fourth arc line (24), a first curve (16), a second curve (17), a third curve (19), a fourth curve (20), a fifth curve (22), a sixth curve (23), a seventh curve (25) and an eighth curve (26); four cavity grooves (13) are axially arranged on a cylindrical surface of the rotor, the four cavity grooves are uniformly arranged in the circumferential direction of the rotor, the contour lines of the cross sections of the cavity grooves are circular arc lines, two end surfaces of the cavity grooves are respectively flush with two side surfaces of the groove, planetary rollers (8) are arranged in the cavity grooves, the planetary rollers are rotatably supported at two ends of the rotor through roller shafts (2), the planetary rollers are coaxial with the cavity grooves, the contour lines of the cross sections of the planetary rollers are closed lines formed by connecting fifth circular arc lines (35), sixth circular arc lines (29), seventh circular arc lines (31), eighth circular arc lines (33), ninth curves (28), tenth curves (30), eleventh curves (32) and twelfth curves (34), the closed lines are graphs which are centrosymmetric about the center points of the cross sections of the planetary rollers, and are also rotational symmetric graphs which take the center points as rotational symmetric centers and the rotational angles of 90 degrees, in a rectangular plane coordinate system with the central point as an origin, the ninth curve and the eleventh curve are symmetrical with respect to the abscissa axis, and the equation of the ninth curve is as follows:

x²+( R₂-y)²- R₁ ²=0, wherein-a ≦ x ≦ a, (R)₂- R₁）≤y≤b；

The fifth circular arc line and the sixth circular arc line as well as the seventh circular arc line and the eighth circular arc line are respectively symmetrical relative to the ordinate axis, and the radius of the fifth circular arc line, the radius of the sixth circular arc line, the radius of the seventh circular arc line and the radius of the eighth circular arc line are consistent with the radius of the cross section contour line of the cavity groove and are R₃- R₁；

In the outer contour lines of the cross section of the working cavity, a first arc line is connected between a first curve and an eighth curve, a second arc line is connected between a second curve and a third curve, a third arc line is connected between a fourth curve and a fifth curve, a fourth arc line is connected between a sixth curve and a seventh curve, the first curve is connected with the second curve, the third curve is connected with the fourth curve, the fifth curve is connected with the sixth curve, the seventh curve is connected with the eighth curve, the first, second, third and fourth arc lines are arc lines with the center of the rotor shaft as the center of a circle and the radius of the rotor as the radius, the outer contour line of the cross section of the working cavity is a figure which is centrosymmetric about the center point of the cross section of the rotor, and is also a rotationally symmetric figure with the center point as the rotational symmetry center and the rotation angle of 90 degrees, in a plane rectangular coordinate system with the center point as the origin, the first arc line and the second arc line, and the first curve and the second curve are respectively symmetrical relative to the ordinate axis, and the equation of the first curve is as follows:

（x-a）²+（y-b）²- R₁ ²=0, wherein 0 ≦ x ≦ a · R₃/（R₃- R₁），b·R₃/（R₃- R₁）≤y≤（R₁+b）；

The equation for the second curve is:

（x+a）²+（y-b）²- R₁ ²=0, wherein-a · R₃/（R₃- R₁）≤x≤0，b·R₃/（R₃- R₁）≤y≤（R₁+b）；

In the above formulae, a = R₁·(1-(( R₂ ²+2·R₁·R₃- R₃ ²)/(2· R₁·R₂))²)^1/2，

b=( R₂ ²-2·R₁·R₃+R₃ ²)/(2·R₂)；

Wherein R is₁Is the distance between the axis of the planetary roller and the axis of the rotor, R₂Radius of the rotor, R₃The radius of a first arc line, a second arc line, a third arc line and a fourth arc line in the outer contour line of the cross section of the working cavity;

the planetary rollers are in running fit with the cavity grooves in the cavity grooves, and two end faces of the planetary rollers are attached to two end faces of the cavity grooves and two side faces of the grooves;

a planetary roller synchronous control mechanism is arranged on the end face side of the rotor (6), and when the rotor rotates, under the action of the planetary roller synchronous control mechanism, the four planetary rollers (8) only do circular translation motion without rotation relative to the stator (1);

four fluid inlets (11) and four fluid outlets (10) which are communicated with the working cavity are formed in the stator, through holes of the four fluid inlets in the inner wall of the stator are respectively positioned on one side of a curved surface of the inner wall of the stator corresponding to a first curve near a crest line of the inner wall of the stator corresponding to a connection point of a first curve (16) and a second curve (17), one side of a curved surface of the inner wall of the stator corresponding to a third curve near a crest line of the inner wall of the stator corresponding to a connection point of a third curve (19) and a fourth curve (20), one side of a curved surface of the inner wall of the stator corresponding to a fifth curve near a crest line of the inner wall of the stator corresponding to a connection point of a fifth curve (22) and a sixth curve (23), and one side of a curved surface of the inner wall of the stator corresponding to a seventh curve near a crest line of the inner wall of the stator corresponding to a connection point of; the through holes of the four fluid outlets on the inner wall of the stator are respectively positioned on the side of the curved surface of the inner wall of the stator corresponding to a second curve near the edge line of the inner wall of the stator corresponding to the connection point of a first curve (16) and a second curve (17), on the side of the curved surface of the inner wall of the stator corresponding to a fourth curve near the edge line of the inner wall of the stator corresponding to the connection point of a third curve (19) and a fourth curve (20), on the side of the curved surface of the inner wall of the stator corresponding to a sixth curve near the edge line of the inner wall of the stator corresponding to the connection point of a fifth curve (22) and a sixth curve (23), and on the side of the curved surface of the inner wall of the stator corresponding to an eighth curve near the edge line of the inner wall of the stator corresponding to the connection point.

2. The fluid energy conversion device of claim 1, wherein: the through opening of the fluid inlet (11) on the inner wall of the stator (1) is positioned on the curved surface of the inner wall of the stator corresponding to the first curve (16), the third curve (19), the fifth curve (22) and the seventh curve (25); and the through holes of the fluid outlet (10) on the inner wall of the stator are positioned on the curved surface of the inner wall of the stator corresponding to the second curve (17), the fourth curve (20), the sixth curve (23) and the eighth curve (26).

3. The fluid energy conversion device of claim 2, wherein: and a group of fluid inlet (11) and a fluid outlet (10) which are positioned on the curved surface of the inner wall of the stator corresponding to the first curve (16) and the second curve (17), a group of fluid inlet and fluid outlet which are positioned on the curved surface of the inner wall of the stator corresponding to the third curve (19) and the fourth curve (20), a group of fluid inlet and fluid outlet which are positioned on the curved surface of the inner wall of the stator corresponding to the fifth curve (22) and the sixth curve (23), and a group of fluid inlet and fluid outlet which are positioned on the curved surface of the inner wall of the stator corresponding to the seventh curve (25) and the eighth curve (26) can be simultaneously and respectively covered by the curved surfaces of the planetary rollers corresponding to the ninth curve (28), the tenth curve (30), the eleventh curve (32) and the twelfth curve (34).

4. The fluid energy conversion device of claim 1, wherein: and through openings of the fluid inlet (11) and the fluid outlet (10) on the inner wall of the stator (1) are positioned on the inner wall of the end part of the stator.

5. The fluid energy conversion device of claim 4, wherein: when the rotor (6) rotates to the fact that the edge line of the inner wall of the stator contacts with the planet roller curved surface corresponding to the ninth curve (28), the tenth curve (30), the eleventh curve (32) and the twelfth curve (34), the four fluid inlets (11) and the four fluid outlets (10) can be communicated with eight closed spaces formed between the planet roller curved surface and the inner wall of the stator respectively at the same time.

6. The fluid energy conversion device of claim 1, wherein: the planetary roller synchronous control mechanism comprises two central gears (3), four synchronous gears (5) and four intermediate gears (4), the two central gears are respectively fixed at two ends of the stator (1) and are coaxial with the rotor (6), the synchronous gears are respectively fixed at one end of the roller shaft (2), the intermediate gears are rotatably arranged on the end face of the rotor and are respectively positioned between the central gears and the synchronous gears, and each intermediate gear is simultaneously meshed with one central gear and one synchronous gear.

7. A rotary engine comprising a stator (1) and a rotor (6) located in the stator cavity, the rotor being rotatably supported at both ends of the stator by a rotor shaft (7), characterized in that: the rotor is cylindrical, the rotor is coaxially and rotatably matched with the inner cavity of the stator in the inner cavity of the stator, a groove (9) is formed in the wall of the cylindrical inner cavity of the stator rotatably matched with the rotor along the circumferential direction, so that a closed working cavity (12) is formed between the stator and the rotor, the inner contour line of the cross section of the working cavity is a circle which takes the axis of the rotor as the center of the circle and the radius of the rotor as the radius, and the outer contour line of the cross section of the working cavity is a closed line formed by connecting a first arc line (27), a second arc line (18), a third arc line (21), a fourth arc line (24), a first curve (16), a second curve (17), a third curve (19), a fourth curve (20), a fifth curve (22), a sixth curve (23), a seventh curve (25) and an eighth curve (26); four cavity grooves (13) are axially arranged on a cylindrical surface of the rotor, the four cavity grooves are uniformly arranged in the circumferential direction of the rotor, the contour lines of the cross sections of the cavity grooves are circular arc lines, two end surfaces of the cavity grooves are respectively flush with two side surfaces of the groove, planetary rollers (8) are arranged in the cavity grooves, the planetary rollers are rotatably supported at two ends of the rotor through roller shafts (2), the planetary rollers are coaxial with the cavity grooves, the contour lines of the cross sections of the planetary rollers are closed lines formed by connecting fifth circular arc lines (35), sixth circular arc lines (29), seventh circular arc lines (31), eighth circular arc lines (33), ninth curves (28), tenth curves (30), eleventh curves (32) and twelfth curves (34), the closed lines are graphs which are centrosymmetric about the center points of the cross sections of the planetary rollers, and are also rotational symmetric graphs which take the center points as rotational symmetric centers and the rotational angles of 90 degrees, in a rectangular plane coordinate system with the central point as an origin, the ninth curve and the eleventh curve are symmetrical with respect to the abscissa axis, and the equation of the ninth curve is as follows:

x²+( R₂-y)²- R₁ ²=0, wherein-a ≦ x ≦ a, (R)₂- R₁）≤y≤b；

The fifth circular arc line and the sixth circular arc line as well as the seventh circular arc line and the eighth circular arc line are respectively symmetrical relative to the ordinate axis, and the radius of the fifth circular arc line, the radius of the sixth circular arc line, the radius of the seventh circular arc line and the radius of the eighth circular arc line are consistent with the radius of the cross section contour line of the cavity groove and are R₃- R₁；

In the outer contour lines of the cross section of the working cavity, a first arc line is connected between a first curve and an eighth curve, a second arc line is connected between a second curve and a third curve, a third arc line is connected between a fourth curve and a fifth curve, a fourth arc line is connected between a sixth curve and a seventh curve, the first curve is connected with the second curve, the third curve is connected with the fourth curve, the fifth curve is connected with the sixth curve, the seventh curve is connected with the eighth curve, the first, second, third and fourth arc lines are arc lines with the center of the rotor shaft as the center of a circle and the radius of the rotor as the radius, the outer contour line of the cross section of the working cavity is a figure which is centrosymmetric about the center point of the cross section of the rotor, and is also a rotationally symmetric figure with the center point as the rotational symmetry center and the rotation angle of 90 degrees, in a plane rectangular coordinate system with the center point as the origin, the first arc line and the second arc line, and the first curve and the second curve are respectively symmetrical relative to the ordinate axis, and the equation of the first curve is as follows:

（x-a）²+（y-b）²- R₁ ²=0, wherein 0 ≦ x ≦ a · R₃/（R₃- R₁），b·R₃/（R₃- R₁）≤y≤（R₁+b）；

The equation for the second curve is:

（x+a）²+（y-b）²- R₁ ²=0, wherein-a · R₃/（R₃- R₁）≤x≤0，b·R₃/（R₃- R₁）≤y≤（R₁+b）；

In the above formulae, a = R₁·(1-(( R₂ ²+2·R₁·R₃- R₃ ²)/(2· R₁·R₂))²)^1/2，

b=( R₂ ²-2·R₁·R₃+R₃ ²)/(2·R₂)；

Wherein R is₁Is the distance between the axis of the planetary roller and the axis of the rotor, R₂Radius of the rotor, R₃The radius of a first arc line, a second arc line, a third arc line and a fourth arc line in the outer contour line of the cross section of the working cavity;

the planetary rollers are in running fit with the cavity grooves in the cavity grooves, two end faces of the planetary rollers are attached to two end faces of the cavity grooves and two side faces of the groove, and air guide grooves (36) are transversely formed in the curved surfaces of the planetary rollers corresponding to the ninth curve and the eleventh curve;

a planetary roller synchronous control mechanism is arranged on the end face side of the rotor (6), and when the rotor rotates, under the action of the planetary roller synchronous control mechanism, the four planetary rollers (8) only do circular translation motion without rotation relative to the stator (1);

two fluid inlets (11) and two fluid outlets (10) communicated with the working cavity are formed in the stator, through openings of the two fluid inlets in the inner wall of the stator are respectively positioned on one side of a curved surface of the inner wall of the stator corresponding to a third curve near a crest line of the inner wall of the stator corresponding to a connection point of a third curve (19) and a fourth curve (20), and on one side of a curved surface of the inner wall of the stator corresponding to a seventh curve near a crest line of the inner wall of the stator corresponding to a connection point of a seventh curve (25) and an eighth curve (26); the through holes of the two fluid outlets on the inner wall of the stator are respectively positioned on the side of the curved surface of the inner wall of the stator corresponding to a fourth curve near the edge line of the inner wall of the stator corresponding to the connection point of a third curve (19) and a fourth curve (20), and on the side of the curved surface of the inner wall of the stator corresponding to an eighth curve near the edge line of the inner wall of the stator corresponding to the connection point of a seventh curve (25) and an eighth curve (26);

and an oil nozzle (14) is arranged on the stator, and when the two planetary rollers are positioned on the ordinate axis of a plane rectangular coordinate system taking the central point of the cross section of the rotor as the origin, the space formed between the curved surface of the planetary roller corresponding to the ninth curve (28) and the curved surface of the inner wall of the stator corresponding to the first curve and the second curve, and the space formed between the curved surface of the planetary roller corresponding to the eleventh curve (32) and the curved surface of the inner wall of the stator corresponding to the fifth curve and the sixth curve are communicated with the oil nozzle.

8. The rotary engine as recited in claim 7, wherein: the planetary roller synchronous control mechanism comprises two central gears (3), four synchronous gears (5) and four intermediate gears (4), the two central gears are respectively fixed at two ends of the stator (1) and are coaxial with the rotor (6), the synchronous gears are respectively fixed at one end of the roller shaft (2), the intermediate gears are rotatably arranged on the end face of the rotor and are respectively positioned between the central gears and the synchronous gears, and each intermediate gear is simultaneously meshed with one central gear and one synchronous gear.

9. The rotary engine as recited in claim 7, wherein: the through holes of the fluid inlet (11) on the inner wall of the stator (1) are positioned on the curved surfaces of the inner wall of the stator corresponding to the third curve (19) and the seventh curve (25), and the through holes of the fluid outlet (10) on the inner wall of the stator are positioned on the curved surfaces of the inner wall of the stator corresponding to the fourth curve (20) and the eighth curve (26).

10. The rotary engine as recited in claim 7, wherein: the oil nozzle (14) is positioned at a stator part corresponding to the stator inner wall curved surface corresponding to the first curve (16) or/and the second curve (17) and a stator part corresponding to the stator inner wall curved surface corresponding to the fifth curve (22) or/and the sixth curve (23).

11. A rotary engine comprising a stator (1) and a rotor (6) located in the stator cavity, the rotor being rotatably supported at both ends of the stator by a rotor shaft (7), characterized in that: the rotor is cylindrical, the rotor is coaxially and rotatably matched with the inner cavity of the stator in the inner cavity of the stator, a groove (9) is formed in the wall of the cylindrical inner cavity of the stator rotatably matched with the rotor along the circumferential direction, so that a closed working cavity (12) is formed between the stator and the rotor, the inner contour line of the cross section of the working cavity is a circle which takes the axis of the rotor as the center of the circle and the radius of the rotor as the radius, and the outer contour line of the cross section of the working cavity is a closed line formed by connecting a first arc line (27), a second arc line (18), a third arc line (21), a fourth arc line (24), a first curve (16), a second curve (17), a third curve (19), a fourth curve (20), a fifth curve (22), a sixth curve (23), a seventh curve (25) and an eighth curve (26); four cavity grooves (13) are axially arranged on a cylindrical surface of the rotor, the four cavity grooves are uniformly arranged in the circumferential direction of the rotor, the contour lines of the cross sections of the cavity grooves are circular arc lines, two end surfaces of the cavity grooves are respectively flush with two side surfaces of the groove, planetary rollers (8) are arranged in the cavity grooves, the planetary rollers are rotatably supported at two ends of the rotor through roller shafts (2), the planetary rollers are coaxial with the cavity grooves, the contour lines of the cross sections of the planetary rollers are closed lines formed by connecting fifth circular arc lines (35), sixth circular arc lines (29), seventh circular arc lines (31), eighth circular arc lines (33), ninth curves (28), tenth curves (30), eleventh curves (32) and twelfth curves (34), the closed lines are graphs which are centrosymmetric about the center points of the cross sections of the planetary rollers, and are also rotational symmetric graphs which take the center points as rotational symmetric centers and the rotational angles of 90 degrees, in a rectangular plane coordinate system with the central point as an origin, the ninth curve and the eleventh curve are symmetrical with respect to the abscissa axis, and the equation of the ninth curve is as follows:

x²+( R₂-y)²- R₁ ²=0, wherein-a ≦ x ≦ a, (R)₂- R₁）≤y≤b；

The fifth circular arc line and the sixth circular arc line as well as the seventh circular arc line and the eighth circular arc line are respectively symmetrical relative to the ordinate axis, and the radius of the fifth circular arc line, the radius of the sixth circular arc line, the radius of the seventh circular arc line and the radius of the eighth circular arc line are consistent with the radius of the cross section contour line of the cavity groove and are R₃- R₁；

In the outer contour lines of the cross section of the working cavity, a first arc line is connected between a first curve and an eighth curve, a second arc line is connected between a second curve and a third curve, a third arc line is connected between a fourth curve and a fifth curve, a fourth arc line is connected between a sixth curve and a seventh curve, the first curve is connected with the second curve, the third curve is connected with the fourth curve, the fifth curve is connected with the sixth curve, the seventh curve is connected with the eighth curve, the first, second, third and fourth arc lines are arc lines with the center of the rotor shaft as the center of a circle and the radius of the rotor as the radius, the outer contour line of the cross section of the working cavity is a figure which is centrosymmetric about the center point of the cross section of the rotor, and is also a rotationally symmetric figure with the center point as the rotational symmetry center and the rotation angle of 90 degrees, in a plane rectangular coordinate system with the center point as the origin, the first arc line and the second arc line, and the first curve and the second curve are respectively symmetrical relative to the ordinate axis, and the equation of the first curve is as follows:

（x-a）²+（y-b）²- R₁ ²=0, wherein 0 ≦ x ≦ a · R₃/（R₃- R₁），b·R₃/（R₃- R₁）≤y≤（R₁+b）；

The equation for the second curve is:

（x+a）²+（y-b）²- R₁ ²=0, wherein-a · R₃/（R₃- R₁）≤x≤0，b·R₃/（R₃- R₁）≤y≤（R₁+b）；

In the above formulae, a = R₁·(1-(( R₂ ²+2·R₁·R₃- R₃ ²)/(2· R₁·R₂))²)^1/2，

b=( R₂ ²-2·R₁·R₃+R₃ ²)/(2·R₂)；

Wherein R is₁Is the distance between the axis of the planetary roller and the axis of the rotor, R₂Radius of the rotor, R₃The radius of a first arc line, a second arc line, a third arc line and a fourth arc line in the outer contour line of the cross section of the working cavity;

the planetary rollers are in running fit with the cavity grooves in the cavity grooves, two end faces of the planetary rollers are attached to two end faces of the cavity grooves and two side faces of the groove, and air guide grooves (36) are transversely formed in the curved surfaces of the planetary rollers corresponding to the ninth curve and the eleventh curve;

a planetary roller synchronous control mechanism is arranged on the end face side of the rotor (6), and when the rotor rotates, under the action of the planetary roller synchronous control mechanism, the four planetary rollers (8) only do circular translation motion without rotation relative to the stator (1);

two fluid inlets (11) and two fluid outlets (10) communicated with the working cavity are formed in the stator, through openings of the two fluid inlets in the inner wall of the stator are respectively positioned on one side of a curved surface of the inner wall of the stator corresponding to a third curve near a crest line of the inner wall of the stator corresponding to a connection point of a third curve (19) and a fourth curve (20), and on one side of a curved surface of the inner wall of the stator corresponding to a seventh curve near a crest line of the inner wall of the stator corresponding to a connection point of a seventh curve (25) and an eighth curve (26); the through holes of the two fluid outlets on the inner wall of the stator are respectively positioned on the side of the curved surface of the inner wall of the stator corresponding to a fourth curve near the edge line of the inner wall of the stator corresponding to the connection point of a third curve (19) and a fourth curve (20), and on the side of the curved surface of the inner wall of the stator corresponding to an eighth curve near the edge line of the inner wall of the stator corresponding to the connection point of a seventh curve (25) and an eighth curve (26);

and an oil nozzle (14) and a spark plug (15) are arranged on the stator, and when the two planetary rollers are positioned on the ordinate axis of a plane rectangular coordinate system taking the central point of the cross section of the rotor as the origin, the space formed between the curved surface of the planetary roller corresponding to the ninth curve (28) and the curved surfaces of the inner walls of the stator corresponding to the first curve and the second curve, and the space formed between the curved surface of the planetary roller corresponding to the eleventh curve (32) and the curved surfaces of the inner walls of the stator corresponding to the fifth curve and the sixth curve are communicated with the oil nozzle and the spark plug.

12. The rotary engine as recited in claim 11, wherein: the planetary roller synchronous control mechanism comprises two central gears (3), four synchronous gears (5) and four intermediate gears (4), the two central gears are respectively fixed at two ends of the stator (1) and are coaxial with the rotor (6), the synchronous gears are respectively fixed at one end of the roller shaft (2), the intermediate gears are rotatably arranged on the end face of the rotor and are respectively positioned between the central gears and the synchronous gears, and each intermediate gear is simultaneously meshed with one central gear and one synchronous gear.

13. The rotary engine as recited in claim 11, wherein: the through holes of the fluid inlet (11) on the inner wall of the stator (1) are positioned on the curved surfaces of the inner wall of the stator corresponding to the third curve (19) and the seventh curve (25), and the through holes of the fluid outlet (10) on the inner wall of the stator are positioned on the curved surfaces of the inner wall of the stator corresponding to the fourth curve (20) and the eighth curve (26).

14. The rotary engine as recited in claim 11, wherein: the oil spray nozzle (14) and the spark plug (15) are positioned at a stator part corresponding to the curved surface of the inner wall of the stator corresponding to the first curve (16) or/and the second curve (17) and a stator part corresponding to the curved surface of the inner wall of the stator corresponding to the fifth curve (22) or/and the sixth curve (23).

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