CA2157267A1 - Forced compression type pump - Google Patents
Forced compression type pumpInfo
- Publication number
- CA2157267A1 CA2157267A1 CA002157267A CA2157267A CA2157267A1 CA 2157267 A1 CA2157267 A1 CA 2157267A1 CA 002157267 A CA002157267 A CA 002157267A CA 2157267 A CA2157267 A CA 2157267A CA 2157267 A1 CA2157267 A1 CA 2157267A1
- Authority
- CA
- Canada
- Prior art keywords
- cylindrical body
- pump case
- rotating body
- eccentric rotating
- compression type
- 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.)
- Abandoned
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2/00—Rotary-piston machines or pumps
- F04C2/30—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
- F04B1/0404—Details or component parts
- F04B1/0413—Cams
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
Abstract
1. A forced compression type pump including a cylindrically shaped pump case, an eccentric rotating body shaft-supported on said pump case at an eccentric position relative to said pump case and a compressing and forcibly sending member movable in a radial direction or said eccentric rotating body and adapted to be brought into press contact with the interior wall of said pump case, characterized in that the interior space is formed at the central part of said eccentric rotating body, a plurality of guide grooves are formed in a radial direction from said interior space to the circumferential surface of said eccentric rotating body, a plurality of circumferentially contacting cylindrical body inserted in said guide grooves and movable freely in a radial direction are formed, said plurality of circumferential contacting cylindrical body are in a planetary relationship relative to said central cylindrical body and the outer circumferential surfaces of said circumferentially contacting bodies are brought into press contact with the interior wall of said pump case while the circumferential surfaces of said circumferentially contacting bodies on their center sides are brought into press contact with said central cylindrical body, whereby said circumferentially contacting bodies are made to act as compressing and forcibly sending members.
Description
z15~26~
SPECIFICATION
Title of the invention Forced compression type pump Field of the invention This invention relates to a forced compression type pump including a cylindrically shaped pump case, an eccentric rotating body and a compressing and a colllp-~sshlg and forcibly sending member which press contacts with the interior wall of said pump case.
Background of the invention As a forced compression type pump of this kind, "liquid and gas forced compression type pump" (Japanese Utility Model Application Publication Gazette No.55-184542) has been known.
Referring to Fig. 4, the above forced compression type pump includes a cylindrically shaped pump case A. an eccentric rotating body B sha~-supported on said pump case A at an eccentric position thereof and a compressing and forcibly sending member C which is movable in a radial direction of said eccentric rotating body B and is adapted to be brought into press contact with the interior wall of said pump case A, wherein said compressing and forcibly sending member C is composed of a rod-like roller 10 which is movable in a radial direction of said eccentric rotating body B and the volume of a forcibly sending member Q is reduced gradually from the inlet side 1 toward the outlet side ~ by rotation of said eccentric rotating body B so as to forcibly send gas or liquid.
In the above forced compression type pump which has already known~ the difference in speed between the roller 10 and the roller support body 11 is big and accordingly the problem of much abrasion is involved Summar~ of the invention In the present invention, an interior space is formed at the central position of an eccentric rotating body, a plurality of guide grooves ext~n-ling radically from said interior space to the circu--lre- e~lial surface of said eccentric rotating body are formed and there are provided a central cylindrical body inserted in said interior space of the eccentric rotating body and a plurality of circul..fe-enlially contacting cylindrical bodies inserted in said guide grooves and movable freely in a radial direction.
Under this arrangement, said plurality of circu~n~ lially contacting cylindrical bodies are placed in a planetary relationship relative to said central cylindrical body, and the outer circull-rerelllial surfaces of said circul--fel e-llially cont~cting bodies are brought into press contact with the interior wall of said pump case while the circumft renlial surfaces of said circu-.lfe-e-llially cont~cting bodies on their center sides are brought into press contact with said central cylindrical body, whereby said circulllfelelllially cont~cting bodies are made to act as compressing and forcibly sending members.
Brief description of the draw;n~
Fig. I is a vertical section ( in a crossing direction in plane ) of a forced compression type pump which is an embodiment of the present invention.
Fig. 2 is a cross section, taken along the S - S line in Fig. 1.
Fig. 3 is a vertical section ( in a longitudinal direction in plane ) of a forced compression type pump of the present invention.
Fig. 4 is a vertical section ( similar to Fig. I ) of a known forced compression type pump.
- _ 2157267 Detailed description of a preferred embodiment of the invention The present invention is described below in detail, with reference to embodiments shown in Fig. I - Fig. 3 ).
Similarly to the known forced compression type pump, a forced compression type pump of the present invention is composed of a cylindrically shaped pump case having an interior space, an eccentric rotating body shaft-supported on said pump case at an eccentric position thereof and a co~l~pressing and forcibly sending member movable in a radial direction of said eccentric rotating body and adapted to be brought into press contact with the interior wall of said pump case. However, in embodying the present invention, an interior space 3 is formed at the central position of said eccentric rotating body B and a plurality of guide grooves 4 extending radically from said interior space 3 to the circulllreren~ial surface of said eccentric rotating body B are formed, and there are provided a plurality of circunlfel en~ially cont~cting cylindrical bodies 5 that are inserted in said guide grooves 4 and are movable in a radial direction, with their axial center direction in parallel with the axial center of said eccentric rotating body B and a central cylindrical body 6 that is inserted in said interior space 3 and is circulllrere~l~ially contacted with a plurality of cylindrical body 5. The outer circulll~l en~ial surface of said circulllfe, el"ially cont~ctinSg cylindrical bodies 5 are brought into press contact with the interior wall of said pump case A and are made to act as compressing and forcibly sending members C.
Referring to Fig. 1, a plurality of guide grooves 4 formed radically on said eccentric rotating body B are positioned in such a fashion that the extension line Z2 of the wall surface 4a of the guide groove 4 is in parallel with the line Z 1 which passes throu;gh the axial center Pl of the eccentric rotating body B and the axial center P2 of the circull.feren~ially cont~ctin~ cylindrical body 5.
The eccentric rotating body B is shaft-supported on the pump case A in an eccentric position by a bearing 7 and is rotated by a driving gear 8. The eccentric rotating body B is in eccentric position relative to the pump case A but the central cylindrical body 6 is positioned at the axial center P3 of the cylindrically shaped interior space (in vertical section of the pump case A ). In Dig. 3, numeral 9 denotes an 0- ring for sealing.
While the eccentric rotating body B is turning, both the circumferential contacting cylindrical body S and the central cylindrical body 6 are rotating at all times and consequently, while the circumferential surface on the inner center side of the circu--lrere~llial contacting cylindrical body 5 press contacts with the central cylindrical body 6 as it is rotating, the outer circulllfelel,tial surface ofthe circumferential cylindrical body S press contacts with the interior wall of the pump case A as it is rotating. Thus, the interior wall of the pump case A and the circumferential contacting cylindrical body 5 are in the state of rotary friction to each other at all times.
By the rotation of the eccentric rotating body B, volume of the forcibly sending member Q is reduced gradually from the inlet side I toward the outlet side 2 so as to forcibly send gas or liquid.
If the interior wall surface which contacts at least with the circumferential contacting cylindrical body of the pump case is made of elastic member, it is convenient for slurry conveyance ( conveyin~ of fine ~rains ) because the interior wall surface can be deformed elastically.
If the circulnfel ~nLial contacting cylindrical body is made of elastic member or if it is cylindrically shaped and is elastically deformable, sealing effect on the interior space of the eccentric rotating body B can be heightened.
In this case, if the diameter of the circulllrelellLial cont~cting cylindrical body is made lar~e in relation to the guide groove, it is deformed forcibly into elliptical shape with the result that it is reduced in its diameter and sealing effect can be heightened.
Possibility of industrial utilization As mentioned above, in the forced coll~pïes~ion type pump according to the present invention the circulllrelellLial Cont~ctinE cylindrical body which acts as the colllplessing and forcibly sending member moves in contact with the interior wall of the pump case while it is rotating at all times. Therefore, the circunlfelellLial contacting cylindrical body which acts as the compressing and forcibly sending member and the interior wall of the pump case are in the state of rotary friction to each other at all times.
Also, as the circulll~el~nlial cont~ctinE cylindrical body is controlled in its eccentric moving quantity by the guide groove of the eccentric rotary body and the central cylindrical body, the central cylindrical body and the circulllÇefe''lial contacting cylindrical body are in rotary contact with each other at a small speed difference and accordingly abrasion of both the interior wall of the pump case and the compressing and forcibly sending member is reduced considerably. As a result, the function of the forced compression type pump is kept semi-permanently and maintenance of the pump is facilitated.
SPECIFICATION
Title of the invention Forced compression type pump Field of the invention This invention relates to a forced compression type pump including a cylindrically shaped pump case, an eccentric rotating body and a compressing and a colllp-~sshlg and forcibly sending member which press contacts with the interior wall of said pump case.
Background of the invention As a forced compression type pump of this kind, "liquid and gas forced compression type pump" (Japanese Utility Model Application Publication Gazette No.55-184542) has been known.
Referring to Fig. 4, the above forced compression type pump includes a cylindrically shaped pump case A. an eccentric rotating body B sha~-supported on said pump case A at an eccentric position thereof and a compressing and forcibly sending member C which is movable in a radial direction of said eccentric rotating body B and is adapted to be brought into press contact with the interior wall of said pump case A, wherein said compressing and forcibly sending member C is composed of a rod-like roller 10 which is movable in a radial direction of said eccentric rotating body B and the volume of a forcibly sending member Q is reduced gradually from the inlet side 1 toward the outlet side ~ by rotation of said eccentric rotating body B so as to forcibly send gas or liquid.
In the above forced compression type pump which has already known~ the difference in speed between the roller 10 and the roller support body 11 is big and accordingly the problem of much abrasion is involved Summar~ of the invention In the present invention, an interior space is formed at the central position of an eccentric rotating body, a plurality of guide grooves ext~n-ling radically from said interior space to the circu--lre- e~lial surface of said eccentric rotating body are formed and there are provided a central cylindrical body inserted in said interior space of the eccentric rotating body and a plurality of circul..fe-enlially contacting cylindrical bodies inserted in said guide grooves and movable freely in a radial direction.
Under this arrangement, said plurality of circu~n~ lially contacting cylindrical bodies are placed in a planetary relationship relative to said central cylindrical body, and the outer circull-rerelllial surfaces of said circul--fel e-llially cont~cting bodies are brought into press contact with the interior wall of said pump case while the circumft renlial surfaces of said circu-.lfe-e-llially cont~cting bodies on their center sides are brought into press contact with said central cylindrical body, whereby said circulllfelelllially cont~cting bodies are made to act as compressing and forcibly sending members.
Brief description of the draw;n~
Fig. I is a vertical section ( in a crossing direction in plane ) of a forced compression type pump which is an embodiment of the present invention.
Fig. 2 is a cross section, taken along the S - S line in Fig. 1.
Fig. 3 is a vertical section ( in a longitudinal direction in plane ) of a forced compression type pump of the present invention.
Fig. 4 is a vertical section ( similar to Fig. I ) of a known forced compression type pump.
- _ 2157267 Detailed description of a preferred embodiment of the invention The present invention is described below in detail, with reference to embodiments shown in Fig. I - Fig. 3 ).
Similarly to the known forced compression type pump, a forced compression type pump of the present invention is composed of a cylindrically shaped pump case having an interior space, an eccentric rotating body shaft-supported on said pump case at an eccentric position thereof and a co~l~pressing and forcibly sending member movable in a radial direction of said eccentric rotating body and adapted to be brought into press contact with the interior wall of said pump case. However, in embodying the present invention, an interior space 3 is formed at the central position of said eccentric rotating body B and a plurality of guide grooves 4 extending radically from said interior space 3 to the circulllreren~ial surface of said eccentric rotating body B are formed, and there are provided a plurality of circunlfel en~ially cont~cting cylindrical bodies 5 that are inserted in said guide grooves 4 and are movable in a radial direction, with their axial center direction in parallel with the axial center of said eccentric rotating body B and a central cylindrical body 6 that is inserted in said interior space 3 and is circulllrere~l~ially contacted with a plurality of cylindrical body 5. The outer circulll~l en~ial surface of said circulllfe, el"ially cont~ctinSg cylindrical bodies 5 are brought into press contact with the interior wall of said pump case A and are made to act as compressing and forcibly sending members C.
Referring to Fig. 1, a plurality of guide grooves 4 formed radically on said eccentric rotating body B are positioned in such a fashion that the extension line Z2 of the wall surface 4a of the guide groove 4 is in parallel with the line Z 1 which passes throu;gh the axial center Pl of the eccentric rotating body B and the axial center P2 of the circull.feren~ially cont~ctin~ cylindrical body 5.
The eccentric rotating body B is shaft-supported on the pump case A in an eccentric position by a bearing 7 and is rotated by a driving gear 8. The eccentric rotating body B is in eccentric position relative to the pump case A but the central cylindrical body 6 is positioned at the axial center P3 of the cylindrically shaped interior space (in vertical section of the pump case A ). In Dig. 3, numeral 9 denotes an 0- ring for sealing.
While the eccentric rotating body B is turning, both the circumferential contacting cylindrical body S and the central cylindrical body 6 are rotating at all times and consequently, while the circumferential surface on the inner center side of the circu--lrere~llial contacting cylindrical body 5 press contacts with the central cylindrical body 6 as it is rotating, the outer circulllfelel,tial surface ofthe circumferential cylindrical body S press contacts with the interior wall of the pump case A as it is rotating. Thus, the interior wall of the pump case A and the circumferential contacting cylindrical body 5 are in the state of rotary friction to each other at all times.
By the rotation of the eccentric rotating body B, volume of the forcibly sending member Q is reduced gradually from the inlet side I toward the outlet side 2 so as to forcibly send gas or liquid.
If the interior wall surface which contacts at least with the circumferential contacting cylindrical body of the pump case is made of elastic member, it is convenient for slurry conveyance ( conveyin~ of fine ~rains ) because the interior wall surface can be deformed elastically.
If the circulnfel ~nLial contacting cylindrical body is made of elastic member or if it is cylindrically shaped and is elastically deformable, sealing effect on the interior space of the eccentric rotating body B can be heightened.
In this case, if the diameter of the circulllrelellLial cont~cting cylindrical body is made lar~e in relation to the guide groove, it is deformed forcibly into elliptical shape with the result that it is reduced in its diameter and sealing effect can be heightened.
Possibility of industrial utilization As mentioned above, in the forced coll~pïes~ion type pump according to the present invention the circulllrelellLial Cont~ctinE cylindrical body which acts as the colllplessing and forcibly sending member moves in contact with the interior wall of the pump case while it is rotating at all times. Therefore, the circunlfelellLial contacting cylindrical body which acts as the compressing and forcibly sending member and the interior wall of the pump case are in the state of rotary friction to each other at all times.
Also, as the circulll~el~nlial cont~ctinE cylindrical body is controlled in its eccentric moving quantity by the guide groove of the eccentric rotary body and the central cylindrical body, the central cylindrical body and the circulllÇefe''lial contacting cylindrical body are in rotary contact with each other at a small speed difference and accordingly abrasion of both the interior wall of the pump case and the compressing and forcibly sending member is reduced considerably. As a result, the function of the forced compression type pump is kept semi-permanently and maintenance of the pump is facilitated.
Claims (4)
CLAIM
1. A forced compression type pump including a cylindrically shaped pump case, an eccentric rotating body shaft-supported on said pump case at an eccentric position relative to said pump case and a compressing and forcibly sending member movable in a radial direction or said eccentric rotating body and adapted to be brought into press contact with the interior wall of said pump case, characterized in that the interior space is formed at the central part of said eccentric rotating body, a plurality of guide grooves are formed in a radial direction from said interior space to the circumferential surface of said eccentric rotating body, a plurality of circumferentially contacting cylindrical body inserted in said guide grooves and movable freely in a radial direction are formed, said plurality of circumferential contacting cylindrical body are in a planetary relationship relative to said central cylindrical body and the outer circumferential surfaces of said circumferentially contacting bodies are brought into press contact with the interior wall of said pump case while the circumferential surfaces of said circumferentially contacting bodies on their center sides are brought into press contact with said central cylindrical body, whereby said circumferentially contacting bodies are made to act as compressing and forcibly sending members.
2. The forced compression type pump as defined in claim 1, wherein the surface of the interior wall which makes contact at least with the circumferentially contacting cylindrical body is made of elastic member.
3. The forced compression type pump as defined in Claim 1, wherein the circumferentially contacting cylindrical body is made of elastic member.
4 The forced compression type pump as defined in Claim 1, wherein the circumferentially contacting cylindrical body is in cylindrically shaped and is elastically deformable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002157267A CA2157267A1 (en) | 1993-03-01 | 1993-03-01 | Forced compression type pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002157267A CA2157267A1 (en) | 1993-03-01 | 1993-03-01 | Forced compression type pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2157267A1 true CA2157267A1 (en) | 1994-09-15 |
Family
ID=4156514
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002157267A Abandoned CA2157267A1 (en) | 1993-03-01 | 1993-03-01 | Forced compression type pump |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2157267A1 (en) |
-
1993
- 1993-03-01 CA CA002157267A patent/CA2157267A1/en not_active Abandoned
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued | ||
| FZDE | Discontinued |
Effective date: 20010301 |