Oblong-shaped rotor engine having high sealing performance

Patent metadata

Field	Value
Publication number	US-11668232-B2
Application number	US-202117613070-A
Country	US
Kind code	B2
Filing date	Apr 16, 2021
Priority date	Apr 22, 2020
Publication date	Jun 6, 2023
Grant date	Jun 6, 2023

Abstract

An oblong-shaped rotor engine with improved high sealing performance includes an upper end cover, a lower end cover, a rotor, three combustion chambers, three isolation zones, a fuel spray ignition unit, a sealing pin row and an eccentric driving shaft, a sealing pin row, which seals the transition zone between different combustion cylinders, wherein the engine according to this invention can better avoid the effect of structural wear, effectively enhance the sealing performance between combustion chambers and abate gas leakage between cylinders, wherein the designed profile and sealing means can enlarge the design error margin for engines, abate the processing difficulty of engines, and effectively decrease the production costs of engines.

First claim

The invention claimed is:

1. An oblong-shaped rotor engine, comprising:
an upper end cover ( 1 ), a lower end cover ( 2 ), a rotor ( 3 ), three combustion chambers ( 4 ), three isolation zones ( 6 ), three fuel spray ignition units ( 5 ), three sealing pin rows ( 7 ) and an eccentric driving shaft ( 8 ), wherein, the upper end cover ( 1 ) and the lower end cover ( 2 ) are connected with each other by screws ( 9 ) to form a cylinder;
wherein a hollow chamber inside the cylinder is used for rotation of the rotor ( 3 ) and thermal cycle of the three combustion chambers ( 4 ), and wherein working state in a working chamber is defined by cylinder profile and rotor ( 3 ) profile; wherein outline of the cylinder profile is triangular, wherein three protruding inner concaves are evenly arranged along the cylinder in a cycle to form the three combustion chambers ( 4 ), wherein the cylinder profile is formed by wall curves of the three combustion chambers ( 4 ) and curves of the three isolation zones ( 6 ), wherein the wall curves of the three combustion chambers ( 4 ) and the curves of the three isolation zones ( 6 ) are alternately arranged along the cylinder in a cycle, so that a 120-degrees rotational symmetry is present in the cylinder profile; wherein outline of the rotor ( 3 ) profile is oblong-shaped, wherein a central cavity of the rotor ( 3 ) is connected with a central cavity of the upper end cover ( 1 ) and a central cavity of the lower end cover ( 2 ) through an eccentric driving shaft ( 8 ), wherein each of the three fuel spray ignition units ( 5 ) is installed on top of each of the three combustion chambers ( 4 ); wherein the eccentric driving shaft ( 8 ) and the cylinder profile define a motion mode of planetary gears for the rotor ( 3 ), wherein during the rotation of the rotor ( 3 ), compression-expansion periodic motion is formed inside the three combustion chambers ( 4 ), the compression-expansion motion is repeated two times every rotation of the rotor ( 3 ), the respective thermal cycles formed in the three combustion chambers ( 4 ) together drive the rotor ( 3 ) to rotate and output effective power though the eccentric driving shaft ( 8 ),
wherein the sealing pin rows ( 7 ) further comprise at least four sealing pins, wherein the sealing pins are equidistantly arranged on the three isolation zones ( 6 ), wherein the sealing pins are installed in pin holes on the three isolation zones ( 6 ), wherein sliding grooves ( 10 ) are installed on inner walls of the pin holes, wherein each of the sealing pins can slide through each sliding groove ( 10 ) within a sliding scope limited by a block at the end of the sliding groove ( 10 ), wherein each of the sealing pins comprises a base connected with bottom of the pin hole through a spring ( 11 ) and a head equipped with an arc-shaped sliding sealing piece ( 12 ), wherein during the rotation of the rotor ( 3 ), the sealing pin row ( 7 ) maintains constant contact with side wall of the rotor ( 3 ), and seals and isolates the areas on both sides of the sealing pin row ( 7 ) by means of the sliding sealing piece ( 12 ),
wherein curves of the three isolation zones ( 6 ) are all an arc curve, with parameter equation as follows:

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Assignees

• Univ Beihang

Inventors

• Jiang chongwen
• Pi Siyuan
• Xu Chenhao
• Li Zhihao
• Gao Zhenxun
• Li Chunxuan

Classifications

• F02B53/10

  Fuel supply; Introducing fuel to combustion space · CPC title

• F02F11/007

  involving rotary applications · CPC title

• F02B55/14

  Shapes or constructions of combustion chambers · CPC title

• F02B55/02

  Pistons · CPC title

• Y02T10/12

  Improving ICE efficiencies · CPC title