CN-122003540-A - Rotary piston machine

Abstract

A rotary piston machine includes a housing having a hypocycloid profile. Further, a rotor assembly having an approximately hypocycloid profile is included. The rotor assembly includes an apex that conforms to the hypocycloid profile of the housing, and relative movement of the housing and the rotor assembly creates a variable volume. The variable volume allows the rotary piston machine to operate as a compressor, expander, internal combustion engine, volumetric pump, or fluid driven motor.

Inventors

• Chandra Thank you, Carl Raghavan Narasimhan

Assignees

• 钱德拉·谢卡尔·纳拉辛汉
• 乌迪蒂·钱德拉谢卡尔

Dates

Publication Date

20260508

Application Date

20241005

Priority Date

20241004

Claims (9)

1. 1. A rotary piston machine, comprising: a housing having a hypocycloid profile; A rotor assembly having an approximately hypocycloid profile; wherein the apex of the rotor assembly conforms to the hypocycloid profile of the housing, the relative movement of the housing and the rotor assembly producing a variable volume; wherein the variable volume allows the rotary piston machine to operate as a compressor, expander, internal combustion engine, volumetric pump or fluid driven motor.
2. 2. Rotary piston machine according to claim 1, characterized in that it operates in single rotation mode; wherein the rotor assembly and the housing rotate synchronously in the same direction at a fixed gear ratio about their fixed non-coincident axes.
3. 3. The rotary piston machine of claim 1 operating in a planetary rotation mode; Wherein the rotor assembly is mounted on an axis eccentric with respect to the housing axis, revolves around the housing axis while rotating about its own axis in a direction opposite to the rotation direction of the shaft and maintains phase synchronization with the stationary housing.
4. 4. A rotary piston machine according to claims 2 and 3, wherein the rotation of the rotor assembly and the housing are synchronised by a phase adjustment mechanism at a relative gear ratio.
5. 5. A rotary piston machine according to claim 1, wherein a sealing grid is used to prevent fluid leakage from the working chamber, the sealing grid consisting of side seals, top seals and corner sealing elements bridging the top and side seals; Wherein the sealing grid forms a three-dimensional continuous sealing path between the rotor assembly and the housing, Wherein the sealing mesh prevents leakage of fluid from the working chamber.
6. 6. The rotary piston machine of claim 3 wherein the planetary rotary mode housing comprises a plurality of rotary valves configured to determine a function of the rotary piston machine, Wherein the rotary valve is driven by a synchronizing mechanism to allow fluid to enter and exit the variable volume working chamber for a predetermined time interval.
7. 7. The rotary piston machine of claim 1 wherein, when the rotary piston machine is configured as an internal combustion engine, The hypocycloidal profile has an even number of sides (n), and the outer surface of the rotor assembly, which approximates the hypocycloidal profile, has an odd number of sides (n-1) one less than the number of sides of the housing, the vertices of which in operation conform to the inner hypocycloidal profile.
8. 8. Rotary piston machine according to claims 3 and 7, characterized in that said housing comprises: One or more rotary valves disposed on alternating sides of said even side hypocycloid profile, Wherein alternating sides of the even-sided hypocycloid profile, which are not provided with valves, have combustion means for operation as an internal combustion engine.
9. 9. A rotary piston machine according to claim 3, wherein the housing comprises: A rotary valve adjacent to each other on each side of the hypocycloid profile; wherein the rotary valve is dedicated to fluid intake/input through the intake/input rotary valve, Wherein the rotary valve is dedicated to fluid evacuation/venting/output through the evacuation/venting/output rotary valve.

Description

Rotary piston machine Technical Field The present invention relates to a rotary piston machine. More particularly, the present invention relates to a rotary piston machine having a hypocycloid profile and a rotary valve to control fluid ingress and egress in a variable volume chamber. Background The existing reciprocating internal combustion engine is characterized by a large number of components, high complexity and large overall volume/size. Rotary piston engines typically have fewer components and smaller volumes/dimensions. The main disadvantages of existing rotary piston engines are lower fuel efficiency and higher emissions. In addition, the port fluid exchange systems used in existing rotary engines result in significant energy losses in the exhaust stream. Furthermore, in an Internal Combustion Engine (ICE) configuration, most existing rotary piston machines have differences in temperature and expansion (some areas cold, some areas hot), which results in some operational problems. Disclosure of Invention A rotary piston machine includes a housing having an inner hypocycloid profile. In addition, the rotary piston machine includes a rotor assembly having an approximately hypocycloid profile. The rotor assembly apex conforms to the hypocycloid profile of the housing, and relative movement of the housing and the rotor assembly creates a variable volume. The variable volume allows the rotary piston machine to operate as a compressor, expander, internal combustion engine, volumetric pump, or fluid driven motor. In one embodiment, the rotary piston machine operates in a single rotation mode, wherein the rotor assembly and the housing rotate synchronously in the same direction at a fixed gear ratio about their fixed non-coincident axes. The rotation of the rotor assembly and the housing are synchronized in relative gear ratios by a phase adjustment mechanism. Further, in one embodiment operating in a planetary rotation mode, the rotor assembly is mounted on an axis that is eccentric with respect to the housing axis, revolves around the housing axis while spinning about its own axis in a direction opposite to the direction of rotation of the shaft and in phase synchronization with the stationary housing. The rotor assembly includes a seal grid comprised of side seals, top seals, and corner seal elements bridging the top and side seals. The sealing mesh forms a three-dimensional continuous sealing path between the rotor assembly and the housing, the sealing mesh preventing leakage of fluid from the working chamber. In planetary rotation mode, the housing is further provided with one or more rotary valves on each side of the stationary housing, the ports of which open into the working chamber. The rotary valve allows fluid to enter/enter and exit/exhaust/output from the working chamber. The arrangement of the rotary valve depends on the function of the rotary piston machine. The rotary valve is driven by a synchronizing mechanism to allow fluid to enter/enter and exit/exhaust/output the variable volume working chamber for predetermined time intervals. In one embodiment of a four-stroke Internal Combustion Engine (ICE) employing a planetary rotation mode, the hypocycloid profile has an even number (n) of sides. Further, the corresponding outer surface of the rotor assembly approximating a hypocycloid profile has an odd number of sides (n-1) one less than the number of sides of the housing, the apex of which in operation conforms to the inner hypocycloid profile. In the ICE planetary rotation mode embodiment, the housing includes one or more rotary valves disposed on alternating sides of the even-sided hypocycloid profile. The alternating sides of the even-sided hypocycloid profile, which are not provided with valves, contain combustion means for operation as an internal combustion engine. In one embodiment, the rotary valve arrangement includes one rotary valve to control the intake and output/exhaust processes. In one embodiment, the rotary valve arrangement comprises at least two rotary valves adjacent to each other on each side of the hypocycloid profile, wherein at least one rotary valve is dedicated to air/fluid intake/input and at least one rotary valve is dedicated to air/fluid exhaust/output. A method for generating power using a rotary piston machine in an embodiment of an internal combustion engine includes four-stroke operation-intake, compression, power, and exhaust, the strokes being performed during relative movement of the rotor assembly within the housing, wherein the intake and exhaust are processed in a timed manner by a rotary valve system and power is generated by a combustion device. For operation as a compressor, expander, volumetric pump or fluid driven motor, the rotary piston machine is provided with a rotary valve on each side of the hypocycloid profile, the course of operation of which is divided into two cycles-intake/input and exhaust/output. Drawings Fig. 1 shows a cross-sectional