IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0467750
(2002-04-09)
|
우선권정보 |
DE-0018602 (2001-04-12) |
국제출원번호 |
PCT/EP02/03920
(2003-08-13)
|
국제공개번호 |
WO02/08852
(2002-11-07)
|
발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
7 인용 특허 :
3 |
초록
▼
A rotary piston displacement device having an impeller housng with an approximately cylindrical receiving chamber in which an approximately cylindrical piston, which has a smaller outside diameter than and which is mounted eccentrically relative to, the receiving chamber, is provided mounted on an e
A rotary piston displacement device having an impeller housng with an approximately cylindrical receiving chamber in which an approximately cylindrical piston, which has a smaller outside diameter than and which is mounted eccentrically relative to, the receiving chamber, is provided mounted on an eccentric drive. The rotary piston forms an approximately sickle-shaped interspace between its outer wall and the inner wall of the receiving chamber. This interspace is divided into a pressure chamber and a suction chamber by a separating crosspiece that is placed between an inlet opening that is located inside the housing and an outlet opening. The outer and inner fixing locations of the separating crosspiece, which is connected to the housing on the one side and the piston on the other side, are offset with respect to one another in the peripheral direction of the rotary piston. The separating crosspiece is made of a flexible material and has, near both of its fixing ends, bending sections with an intermediate section located therebetween. The intermediate section has a greater bending stiffness than the bending sections.
대표청구항
▼
1. Rotary piston displacement device ( 1 , 2 , 3 ) with a displacement device housing ( 4 ), in which an approximately cylindrical receiving chamber ( 5 ) is provided, for an approximately cylindrical rotary piston ( 6 ) having a smaller external diameter and mounted eccentrically to the receiving c
1. Rotary piston displacement device ( 1 , 2 , 3 ) with a displacement device housing ( 4 ), in which an approximately cylindrical receiving chamber ( 5 ) is provided, for an approximately cylindrical rotary piston ( 6 ) having a smaller external diameter and mounted eccentrically to the receiving chamber ( 5 ) on an eccentric drive ( 7 ) which form an approximately sickle-shaped interspace between an outer wall of the piston and an inner wall of the receiving chamber ( 5 ), the interspace is divided by a separating crosspiece ( 8 ) arranged between an inlet opening ( 11 ) located in the housing ( 4 ) and an outlet opening ( 12 ) into a pressure chamber ( 9 ) and a suction chamber ( 10 ) connected to outer and inner fixing locations for the separating crosspiece ( 8 ), located respectively on the housing ( 4 ) and the rotary piston ( 6 ), which are arranged mutually offset in a peripheral direction of the rotary piston ( 6 ), and the separating crosspiece ( 8 ) being formed of a flexible material, wherein the separating crosspiece ( 8 ) has bending sections near two fixing ends and an intermediate section ( 22 ) having a greater bending stiffness than the bending sections is provided therebetween. 2. Rotary piston displacement device according to claim 1, wherein the separating crosspiece ( 8 ) follows the piston motion without a movement causing elastic deformation or friction, through a hinge-like tilting. 3. Rotary piston displacement device according to claim 1, wherein the outer fixing location of the separating crosspiece ( 8 ) on the housing ( 4 ) between the inlet opening ( 11 ) and the outlet opening ( 12 ) is arranged offset with respect to the outer fixing location on the rotary piston ( 6 ) such that the separating crosspiece ( 8 ) in an abutment position on the inner wall of the receiving chamber ( 5 ) covers the inlet opening ( 11 ) or outlet opening ( 12 ). 4. Rotary piston displacement device according to claim 1, wherein the separating crosspiece ( 8 ) in the abutment position on the inner wall of the receiving chamber ( 5 ) covers the inlet opening ( 11 ). 5. Rotary piston displacement device according to claim 1, wherein the outer fixing location of the separating crosspiece ( 8 ) is arranged on the displacement device housing ( 4 ) between the inlet opening ( 11 ) and the outlet opening ( 12 ) near the outlet opening ( 12 ), and the inner fixing location of the separating crosspiece ( 8 ) is arranged on the rotary piston ( 6 ) near the inlet opening ( 11 ), remote from the outlet opening ( 12 ). 6. Rotary piston displacement device according to claim 1, wherein the separating crosspiece ( 8 ) has bead-like fixing shapes ( 15 ), round or rounded in cross section, at the fixing ends, and matching fixing recesses are provided in the housing ( 4 ) and on the rotary piston ( 1 , 2 , 3 ). 7. Rotary piston displacement device according to claim 6, wherein the bead-like fixing shapes ( 15 ) of the separating crosspiece ( 8 ) project on opposite sides of a middle longitudinal plane of the crosspiece, and the separating crosspiece ( 8 ) is formed approximately S-shaped in longitudinal section. 8. Rotary piston displacement device according to claim 1, wherein the separating crosspiece ( 8 ) is comprised of a flexible plastic, an elastomer and/or spring steel. 9. Rotary piston displacement device according to claim 1, wherein the displacement device housing ( 4 ) and/or the rotary piston ( 6 ) have recesses located in a peripheral course of the separating crosspiece ( 8 ) for at least partially receiving the separating crosspiece ( 8 ). 10. Rotary piston displacement device according to claim 1, wherein the rotary piston ( 6 ) has a central opening ( 17 ) for receiving an eccentric bearing, which is mounted on an eccentric journal ( 19 ) of the eccentric drive ( 7 ). 11. Rotary piston displacement device according to claim 1, wherein the rotary piston displacement device ( 2 ) comprises a compressor, and wherein the compressor has at least one outlet valve ( 22 ). 12. Rotary piston displacement device according to claim 1, wherein the rotary piston device is a part of a compressed air motor and wherein for this at least two rotary piston displacement devices ( 3 , 3 ′), arranged axially adjacent, are provided with rotary pistons ( 6 ) offset by 180° in a direction of rotation. 13. Rotary piston displacement device ( 1 , 2 , 3 ) with a displacement device housing ( 4 ), in which an approximately cylindrical receiving chamber ( 5 ) is provided, for an approximately cylindrical rotary piston ( 6 ) having a smaller external diameter and mounted eccentrically to the receiving chamber ( 5 ) on an eccentric drive ( 7 ) which form an approximately sickle-shaped interspace between an outer wall of the piston and an inner wall of the receiving chamber ( 5 ), the interspace is divided by a separating crosspiece ( 8 ) arranged between an inlet opening ( 11 ) located in the housing ( 4 ) and an outlet opening ( 12 ) into a pressure chamber ( 9 ) and a suction chamber ( 10 ) connected to outer and inner fixing locations for the separating crosspiece ( 8 ), located respectively on the housing ( 4 ) and the rotary piston ( 6 ), which are arranged mutually offset in a peripheral direction of the rotary piston ( 6 ), and the separating crosspiece ( 8 ) being formed of a flexible material, wherein the separating crosspiece ( 8 ) has bending sections near two fixing ends and an intermediate section ( 22 ) having a greater bending stiffness than the bending sections is provided therebetween, and the two bending sections of the separating crosspiece have a smaller cross section than the intermediate section ( 22 ). 14. Rotary piston displacement device ( 1 , 2 , 3 ) with a displacement device housing ( 4 ), in which an approximately cylindrical receiving chamber ( 5 ) is provided, for an approximately cylindrical rotary piston ( 6 ) having a smaller external diameter and mounted eccentrically to the receiving chamber ( 5 ) on an eccentric drive ( 7 ) which form an approximately sickle-shaped interspace between an outer wall of the piston and an inner wall of the receiving chamber ( 5 ), the interspace is divided by a separating crosspiece ( 8 ) arranged between an inlet opening ( 11 ) located in the housing ( 4 ) and an outlet opening ( 12 ) into a pressure chamber ( 9 ) and a suction chamber ( 10 ) connected to outer and inner fixing locations for the separating crosspiece ( 8 ), located respectively on the housing ( 4 ) and the rotary piston ( 6 ), which are arranged mutually offset in a peripheral direction of the rotary piston ( 6 ), and the separating crosspiece ( 8 ) being formed of a flexible material, wherein the separating crosspiece ( 8 ) has bending sections near two fixing ends and an intermediate section ( 22 ) having a greater bending stiffness than the bending sections is provided therebetween, and the intermediate section ( 22 ) of the separating crosspiece ( 8 ) has a reinforcement, comprising an armor inlay ( 21 ), for increasing a compression stiffness in a connecting plane between the fixing ends. 15. Rotary piston displacement device ( 1 , 2 , 3 ) with a displacement device housing ( 4 ), in which an approximately cylindrical receiving chamber ( 5 ) is provided, for an approximately cylindrical rotary piston ( 6 ) having a smaller external diameter and mounted eccentrically to the receiving chamber ( 5 ) on an eccentric drive ( 7 ) which form an approximately sickle-shaped interspace between an outer wall of the piston and an inner wall of the receiving chamber ( 5 ), the interspace is divided by a separating crosspiece ( 8 ) arranged between an inlet opening ( 11 ) located in the housing ( 4 ) and an outlet opening ( 12 ) into a pressure chamber ( 9 ) and a suction chamber ( 10 ) connected to outer and inner fixing locations for the separating crosspiece ( 8 ), located respectively on the housing ( 4 ) and the rotary piston ( 6 ), which are arranged mutually offset in a peripheral direction of the rotary piston ( 6 ), and the separating crosspiece ( 8 ) being formed of a flexible material, wherein the separating crosspiece ( 8 ) has bending sections near two fixing ends and an intermediate section ( 22 ) having a greater bending stiffness than the bending sections is provided therebetween, and wherein at least one peripherally closed seal ( 16 ) is provided laterally near the rotary piston ( 6 ) between at least one sidewall thereof and the housing ( 4 ) or respectively a drive shaft guide ( 13 ). 16. Rotary piston displacement device according to claim 15, wherein ring seals and/or bellows seals are provided as seals ( 16 ).
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