US3871799A - Rotary-piston motor with improved cylinder chamber moving seals - Google Patents

Rotary-piston motor with improved cylinder chamber moving seals Download PDF

Info

Publication number
US3871799A
US3871799A US404363A US40436373A US3871799A US 3871799 A US3871799 A US 3871799A US 404363 A US404363 A US 404363A US 40436373 A US40436373 A US 40436373A US 3871799 A US3871799 A US 3871799A
Authority
US
United States
Prior art keywords
blades
radially
recesses
rotary
fluid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US404363A
Other languages
English (en)
Inventor
Harald Vogt
Walter Moller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TDK Micronas GmbH
ITT Inc
Original Assignee
Deutsche ITT Industries GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE19722251504 external-priority patent/DE2251504C3/de
Application filed by Deutsche ITT Industries GmbH filed Critical Deutsche ITT Industries GmbH
Application granted granted Critical
Publication of US3871799A publication Critical patent/US3871799A/en
Assigned to ITT CORPORATION reassignment ITT CORPORATION CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: INTERNATIONAL TELEPHONE AND TELEGRAPH CORPORATION
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C1/00—Rotary-piston machines or engines
    • F01C1/30—Rotary-piston machines or engines having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F01C1/34—Rotary-piston machines or engines having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F01C1/08 or F01C1/22 and relative reciprocation between the co-operating members
    • F01C1/344—Rotary-piston machines or engines having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F01C1/08 or F01C1/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
    • F01C1/3446—Rotary-piston machines or engines having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F01C1/08 or F01C1/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along more than one line or surface
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/08—Rotary pistons
    • F01C21/0809—Construction of vanes or vane holders

Definitions

  • ABSTRACT A rotary variable chamber motor, such as a hydraulic pressure operated motor, having a plurality of chambers each having variable volume as a function of the angular position of a rotary piston assembly.
  • Spring means tends to keep each working blade extended radially against the shaped inner wall of a housing in which the piston assembly is rotatably mounted.
  • Each working blade has a relatively large number of small recesses or indentations along a portion of each blade face which is in close frictional contact with a corresponding slot face during operation.
  • the present invention relates generally to rotary variable chamber fluid operated motors, and more particularly to means for reducing friction between working blades which reciprocate in corresponding slots of a rotor assembly to act as variable chamber seals against an inner housing surface.
  • Rotary motors of the type to which the present inven-- tion is applicable are well known per se.
  • The-invention is particularly applicable to the slow-running rotarypiston motor having a'plurality of working blades radially movable within the slots of a cylindrical rotary piston pivoted in a housing, wherein the working blades are sealingly guided in a manner suggestive of a cam follower, along the inner housing wall surrounding the rotary piston and forming crescent-shaped working chambers.
  • the present invention provides for these recesses to be disposed along the upper portions of lateral face of the working blades. Furthermore, it has been found that excessive wear can be avoided by locating these recesses along the radially outer edge of the working blade surfaces for distance approximating V2 to /a of the working-blade stroke.
  • the recesses in the lateral face of the working blade preferable have a depth on the order of 1/1000 mm to 4/1000 mm (0.00004 in. and 0.00016 in., approx.) and a diameter between 10/1000 mm and 20/1000 mm (0.0004 in. and 0.0008 in., approx.).
  • the number of recesses is preferably between 300 and.500 per square millimeter.
  • the recesses it is possible to produce the recesses either chemically (by etching or corroding) or mechanically by eroding, stamping, hammering or boring.
  • the recesses may also be conveniently produced by sandblasting or ballblasting. After use of one of these blasting processes, however, the roughness of the blade surface should be reduced to reduce wear.
  • Such a process step may-be accomplished through use of an oil stone for smoothing the overall surface portion of the working blade containing the recesses.
  • FIG. 1 is a sectional view of a rotary-piston engine.
  • FIG. 2 shows a working blade of the rotary-piston engine of FIG. 1.
  • the illustrated rotary-piston engine (FIG. 1) comprises a cylindrical housing 1 wherein is rotationally mounted a rotary piston assembly 2 also of cylindrical shape. Between the housing 1 and the rotary piston 2 there are provided a plurality of crescent-shaped working chambers, typically 3, separated from each other by points 4 at which the inner wall 5 of the housing 1 abuts a portion of the outer circumference of the rotary piston 2.
  • the rotary piston 2 is provided with radial slots 6 containing radially movable working blades 7.
  • the front or outer ends of the working blades 7 are urged against the inner wall 5 of the housing 1 by means of springs 8 supported by the bottom of the slots 6 and acting upon the bottom surfaces of the working blades
  • a plurality of generally kidney-shaped connector openings 9, 9, 9" and 11, 11', 11" the former three communicating with a pressure-medium source 10 and the latter three with a reservoir 12.
  • the working blades projecting into the working chambers and resting against the inner wall 5 provide for separation-of those portions of the working chambers 3 communicating with the pressure-medium source 10 via the openings 9, 9, 9" from those portions connecting with the reservoir 12 via the openings 11, 11', 11''.
  • the pressure difference thereby applied to the working blades 7 gener- 3 ates an engine torque causing the rotary piston 2 to move clockwise as shown in the embodiment of the drawing.
  • Radial movement of the working blades 7 is determined by the outline of the inner wall 5 of the housing 1. Within the region of the disconnecting points 4, the working blades 7 are almost completely retracted into the slots 6 of the rotary piston 2, whereas in the middle of the working chambers 3 they project out of the slots 6 by the greatest amount.
  • the working-blade stroke is determined by those two extreme positions.
  • the upper portion 13a (FIG. 2) of the lateral face 13 of the working blades 7 orthogonal and opposite the direction of rotation of the rotary piston is provided with a plurality of small recesses as can be clearly seen in FIG. 2. Said recesses cause a pressuremedium film to be maintained between the lateral face 13 of the working blades 7 and the adjacent slot surface in the rotary piston within that period of time in which the working blades 7 are in their retracted positions when overriding the disconnecting points 4.
  • This expedient prevents mixed or static friction so that the springs 8, after overriding the disconnecting points 4, have only the low friction forces resulting from fluid friction to overcome, in order to extend the working blades 7.
  • a rotary-piston engine is adapted for operation in two directions of rotation, it is advisable to provide recesses also along the other portion (i.e. the lateral face 14) of the working blades 7 in order to stabilize the fluid film for both directions of rotation.
  • recesses as used herein is intended to describe the plural holes, indentations, or other surface depressions produced in the blade face in a band as illustrated, by any of the chemical or mechanical processes referred to hereinbefore. These recesses are very small in size and will have regular surface perimeters if produced by drilling or stamping or some other comparable process, but will have irregular individual recess shapes and depths if effected by etching on some other comparable chemical method. The actual process to be used is substantially a matter of choice in view of costs and other manufacturing considerations. Other methods of forming the recesses and other variations and modifications of the illustrated and described structure will suggest themselves to those skilled in this art. Accordingly, it is not intended that the scope of the invention should be considered limited by the drawings or this description, these being typical and illustrative only.
  • rotary-piston motor having a housing with a shaped inner circumferential surface and a rotor assembly mounted to rotate within said housing, the combination comprising:
  • Apparatus according to claim 4 in which said individual recesses have depths substantially between 0.001 and 0.004 millimeters and diameters substantially between 0.010 and 0.020 millimeters.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Hydraulic Motors (AREA)
  • Rotary Pumps (AREA)
  • Reciprocating Pumps (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US404363A 1972-10-20 1973-10-05 Rotary-piston motor with improved cylinder chamber moving seals Expired - Lifetime US3871799A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722251504 DE2251504C3 (de) 1972-10-20 Rotationskolbenmaschine, insbesondere langsam laufende Rotationskolben-Kraftmaschine

Publications (1)

Publication Number Publication Date
US3871799A true US3871799A (en) 1975-03-18

Family

ID=5859592

Family Applications (1)

Application Number Title Priority Date Filing Date
US404363A Expired - Lifetime US3871799A (en) 1972-10-20 1973-10-05 Rotary-piston motor with improved cylinder chamber moving seals

Country Status (4)

Country Link
US (1) US3871799A (enrdf_load_html_response)
JP (2) JPS5019003A (enrdf_load_html_response)
GB (1) GB1445400A (enrdf_load_html_response)
IT (1) IT995950B (enrdf_load_html_response)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040244765A1 (en) * 2003-06-06 2004-12-09 Elmer Brent Warren High Efficiency rotary piston combustion engine
CN108916628A (zh) * 2018-07-10 2018-11-30 浙江平柴泵业有限公司 一种高效机油泵
CN114876722A (zh) * 2022-05-25 2022-08-09 哈尔滨理工大学 一种具有表面织构的连续回转马达叶片与定子摩擦副

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5812407A (ja) * 1981-07-15 1983-01-24 Nippon Telegr & Teleph Corp <Ntt> 増幅回路

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2248530A (en) * 1939-06-05 1941-07-08 Granger Edson Raymond Metal article having antifriction surface
US2314604A (en) * 1938-09-03 1943-03-23 Horst Corp Of America V D Method of producing chromium wearing surfaces
US2752893A (en) * 1953-06-10 1956-07-03 Oleskow Mathew Fluid motor

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3031975A (en) * 1959-05-14 1962-05-01 Teves Kg Alfred Rotary hydrostatic machine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2314604A (en) * 1938-09-03 1943-03-23 Horst Corp Of America V D Method of producing chromium wearing surfaces
US2248530A (en) * 1939-06-05 1941-07-08 Granger Edson Raymond Metal article having antifriction surface
US2752893A (en) * 1953-06-10 1956-07-03 Oleskow Mathew Fluid motor

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040244765A1 (en) * 2003-06-06 2004-12-09 Elmer Brent Warren High Efficiency rotary piston combustion engine
US6978758B2 (en) 2003-06-06 2005-12-27 Brent Warren Elmer High Efficiency rotary piston combustion engine
CN108916628A (zh) * 2018-07-10 2018-11-30 浙江平柴泵业有限公司 一种高效机油泵
CN108916628B (zh) * 2018-07-10 2019-12-31 浙江平柴泵业有限公司 一种高效机油泵
CN114876722A (zh) * 2022-05-25 2022-08-09 哈尔滨理工大学 一种具有表面织构的连续回转马达叶片与定子摩擦副

Also Published As

Publication number Publication date
DE2251504A1 (de) 1974-05-09
JPS5019003A (enrdf_load_html_response) 1975-02-28
GB1445400A (en) 1976-08-11
IT995950B (it) 1975-11-20
JPS5851419Y2 (ja) 1983-11-22
DE2251504B2 (de) 1975-07-24
JPS5379949U (enrdf_load_html_response) 1978-07-03

Similar Documents

Publication Publication Date Title
US3869231A (en) Vane type fluid energy translating device
GB1415544A (en) Positive displacement vane-type pumps and motors
SE8007876L (sv) Rotormaskin
US3896707A (en) Filled piston retaining means with erosion protection
US3871799A (en) Rotary-piston motor with improved cylinder chamber moving seals
EP0384335A1 (en) Rotary hydraulic machine
US4392795A (en) Wear resistant rotor slots for vane-type pumps or motors
US4516475A (en) Hydrostatic piston machine
US3762843A (en) Van type rotary hydraulic transducer
JP7153534B2 (ja) ベーンポンプ
GB1182097A (en) Improvements in or Relating to Rotary Piston Machines
JP2012137047A (ja) ベーンポンプ
JP2547643B2 (ja) 斜板型液圧回転機
CN211900964U (zh) 一种油泵
US4310203A (en) Hydrostatic support assembly
JP2017206962A (ja) ポンプ
GB1520971A (en) Vane type motors
US2075843A (en) Fluid pump
US4550644A (en) Drive shaft arrangement to reduce leakage in fluid machines
JPH0417834Y2 (enrdf_load_html_response)
JPS62267589A (ja) ベ−ン式回転圧縮機に於けるベ−ン押出し機構
JPH0648155Y2 (ja) タンデムポンプ
JPS6240149Y2 (enrdf_load_html_response)
US4105376A (en) Rotor for hydraulic pump or motor
SU375402A1 (ru) Радиально-поршневая гидрома1|[]и&#39;н!* &#39;

Legal Events

Date Code Title Description
AS Assignment

Owner name: ITT CORPORATION

Free format text: CHANGE OF NAME;ASSIGNOR:INTERNATIONAL TELEPHONE AND TELEGRAPH CORPORATION;REEL/FRAME:004389/0606

Effective date: 19831122