EP0498981A1 - Gas compressor - Google Patents
Gas compressor Download PDFInfo
- Publication number
- EP0498981A1 EP0498981A1 EP91301191A EP91301191A EP0498981A1 EP 0498981 A1 EP0498981 A1 EP 0498981A1 EP 91301191 A EP91301191 A EP 91301191A EP 91301191 A EP91301191 A EP 91301191A EP 0498981 A1 EP0498981 A1 EP 0498981A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cylinder
- headers
- gas compressor
- gas
- confined
- 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.)
- Granted
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Classifications
-
- 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
- F04B5/00—Machines or pumps with differential-surface pistons
- F04B5/02—Machines or pumps with differential-surface pistons with double-acting pistons
-
- 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
- F04B3/00—Machines or pumps with pistons coacting within one cylinder, e.g. multi-stage
Definitions
- This invention pertains to gas compressors, and in particular to a gas compressor of novel design in which the compression cylinder thereof confines therewithin both the inlet and discharge valves, and the latter valves are piston ringed to serve as the gas compressing pistons.
- a gas compressor comprising a cylinder having a longitudinal axis; and headers at opposite ends of said cylinder; wherein one of said headers has a tapped hole formed in a surface thereof which opens onto said cylinder; the other of said headers has a tapped bore opening therethrough; and a first inlet valve threadedly engaged with said tapped hole and confined within said cylinder; a second inlet valve threadedly engaged with said tapped bore and confined within said cylinder; said second inlet valve has a throughgoing bore formed therein which is coaxial with said tapped bore; a piston rod in penetration of said bores, and having an end projecting outwardly from said other header; a pair of discharge valves coupled to said piston rod, and spaced apart along said rod, confined within said cylinder; gas inlet ports formed in said cylinder at opposite ends thereof; and a gas outlet port formed in said cylinder intermediate said ends thereof.
- the novel compressor 10 comprises a straight cylinder 12, having a longitudinal axis 14, with shouldered recesses 16 and 18 at opposite axial ends thereof.
- An outer header 20, having a prominent, circular land 22 in the centre thereof, is set, with an O-ring for sealing, into the recess 16.
- a frame header 24, which also has a prominent, circular land 26 in the centre thereof, is set too with an O-ring for sealing, into the recess 18.
- the header 20 has a tapped hole 28 formed in the land 22.
- Valve 30, of the one-way, check type has an annular body 34 with piston ring grooves 36 formed thereabout (in which to receive piston rings).
- the land 26 in the frame header 24 also has a tapped bore 38 formed therein; it threadedly receives a second inlet valve 30a.
- Valve 30a is centrally bored to accommodate therethrough a piston rod 40.
- the piston rod 40 penetrates the tapped bore 38 and is slidably engaged with the central bore in the valve 30a.
- One end of the piston rod 40 projects outwardly from the header 24, via one end thereof, and into the cylinder 12 via the opposite end thereof.
- the termination of the in-cylinder end of the rod 40 is threaded; too, intermediate the length of the rod 40 there is a shoulder 42.
- a tubular spacer 44 internally threaded at one end thereof, and externally threaded at opposite ends thereof, is set against the shoulder 42, and threadedly engaged with the threaded termination of the rod 40.
- a pair of discharge valves 46 and 46a are centrally threaded and threadedly engaged with external threads of the spacer 44.
- Valves 46 and 46a are of the one-way, check type, and also have piston ring grooves formed thereabout in which to nest piston rings for sealing against the inner surface of th cylinder 12.
- a pair of inlet ports 50 and 50a are formed in the cylinder 12, adjacent to the axial ends thereof, the same opening onto the inlet valves 30 and 30a. Intermediate the length of the cylinder 12 there is also formed a single discharge port 52. Ends of the cylinder 12 abut the headers 20 and 24 and nest, in grooves formed therefor, O-ring seals 54. Tie rods 56, fastened in the header 24, and in penetration of the header 20, receive nuts 58 on the threaded ends thereof and clamp the cylinder 12 and the headers 20 and 24 securely together. Inlet conduits 60 and 60a are welded to the cylinder 12 for communication with the ports 50 and 50a, and a discharge conduit 52 is similarly welded to the cylinder 12 for communication with the discharge port 52.
- valves 46 and 46a serve the double purpose of piston-compression of the gas, and valved discharge of the compressed gas. Only inlet and discharge ports need to be formed in the cylinder 12, as the valves 30 and 30a, and 46 and 46a are confined within the cylinder.
- the headers 20 and 24 fit firmly into the ends of the simple, straight cylinder 12, and only tie rods are required to clamp the assembly together.
Abstract
a single, straight, walled cylinder (12) having (a) a longitudinal axis (14), and (b) a single, circumferential wall; and
headers (20, 24) at opposite ends of said cylinder (12); wherein
one of said headers (20) has a tapped hole (28) formed in a surface thereof which opens onto said cylinder (12);
the other of said headers (24) has a tapped bore (38) opening therethrough; and
a first inlet vlave (30) threadedly engaged with said tapped hole (28) and confined within said cylinder (12);
a second inlet valve (30a) threadedly engaged with said tapped bore (38) and confined within said cylinder (12);
said second inlet valve (30a) has a throughgoing bore formed therein which is coaxial with said tapped bore (38);
a piston rod (40) in penetration of said bores, and having one end thereof projecting outwardly from said other header (24);
a pair of discharge valves (46, 46a) coupled to said piston rod (40), and spaced apart along said rod (40), confined within said cylinder (12);
gas inlet ports (50, 50a) radially formed in said cylinder (12) at opposite ends thereof; and
a gas outlet port (52) formed in said cylinder intermediate said ends thereof.
Description
- This invention pertains to gas compressors, and in particular to a gas compressor of novel design in which the compression cylinder thereof confines therewithin both the inlet and discharge valves, and the latter valves are piston ringed to serve as the gas compressing pistons.
- Conventional, prior art gas compressors require inlet and discharge valves, and gas compressing pistons. Too, commonly, the valves are external to the compression cylinder.
- It is an object of this invention to set forth a novel gas compressor which obviates any need for separate pistons, and such a compressor of simple, albeit efficient configuration.
- Particularly, it is an object of this invention to set forth a gas compressor comprising a cylinder having a longitudinal axis; and headers at opposite ends of said cylinder; wherein one of said headers has a tapped hole formed in a surface thereof which opens onto said cylinder; the other of said headers has a tapped bore opening therethrough; and a first inlet valve threadedly engaged with said tapped hole and confined within said cylinder; a second inlet valve threadedly engaged with said tapped bore and confined within said cylinder; said second inlet valve has a throughgoing bore formed therein which is coaxial with said tapped bore; a piston rod in penetration of said bores, and having an end projecting outwardly from said other header; a pair of discharge valves coupled to said piston rod, and spaced apart along said rod, confined within said cylinder; gas inlet ports formed in said cylinder at opposite ends thereof; and a gas outlet port formed in said cylinder intermediate said ends thereof.
- Further objects of this invention, as well as the novel features thereof, will become more apparent by reference to the following description, taken in conjunction with the accompanying figures, in which:
- Figure 1 is a perspective illustration of a gas compressor, according to an embodiment of the invention, the same being partly cut away along the axis thereof;
- Figure 2 is a perspective illustration of the piston rod assembly of the Figure 1 embodiment, the same also being cut away in part;
- Figure 3 is a partly cut away perspective illustration of the cylinder and porting; and
- Figures 4 and 5 are cut away depictions of the frame header assembly and outer header assembly, respectively, showing the tie rods and the inlet valves.
- As shown in the figures, the
novel compressor 10 comprises astraight cylinder 12, having alongitudinal axis 14, withshouldered recesses outer header 20, having a prominent,circular land 22 in the centre thereof, is set, with an O-ring for sealing, into therecess 16. Similarly, aframe header 24, which also has a prominent,circular land 26 in the centre thereof, is set too with an O-ring for sealing, into therecess 18. - The
header 20 has a tappedhole 28 formed in theland 22. Aninlet valve 30, having a threadedstub 32, is threadedly engaged with thehole 28. Valve 30, of the one-way, check type, has anannular body 34 withpiston ring grooves 36 formed thereabout (in which to receive piston rings). Theland 26 in theframe header 24 also has a tappedbore 38 formed therein; it threadedly receives asecond inlet valve 30a. Valve 30a, however, is centrally bored to accommodate therethrough apiston rod 40. - The
piston rod 40 penetrates thetapped bore 38 and is slidably engaged with the central bore in thevalve 30a. One end of thepiston rod 40 projects outwardly from theheader 24, via one end thereof, and into thecylinder 12 via the opposite end thereof. The termination of the in-cylinder end of therod 40 is threaded; too, intermediate the length of therod 40 there is ashoulder 42. Atubular spacer 44, internally threaded at one end thereof, and externally threaded at opposite ends thereof, is set against theshoulder 42, and threadedly engaged with the threaded termination of therod 40. A pair ofdischarge valves 46 and 46a, the same havingannular bodies 48, are centrally threaded and threadedly engaged with external threads of thespacer 44.Valves 46 and 46a, too, are of the one-way, check type, and also have piston ring grooves formed thereabout in which to nest piston rings for sealing against the inner surface of thcylinder 12. - A pair of
inlet ports 50 and 50a are formed in thecylinder 12, adjacent to the axial ends thereof, the same opening onto theinlet valves cylinder 12 there is also formed asingle discharge port 52. Ends of thecylinder 12 abut theheaders ring seals 54.Tie rods 56, fastened in theheader 24, and in penetration of theheader 20, receivenuts 58 on the threaded ends thereof and clamp thecylinder 12 and theheaders Inlet conduits cylinder 12 for communication with theports 50 and 50a, and adischarge conduit 52 is similarly welded to thecylinder 12 for communication with thedischarge port 52. - The simplicity of the configuration of the
compressor 10, in this embodiment thereof, can readily be seen; the same offers manufacturing and maintenance ease. More significantly, pistons per se are not required, as thevalves 46 and 46a serve the double purpose of piston-compression of the gas, and valved discharge of the compressed gas. Only inlet and discharge ports need to be formed in thecylinder 12, as thevalves headers straight cylinder 12, and only tie rods are required to clamp the assembly together.
Claims (10)
- A gas compressor (10), comprising:
a single, straight, walled cylinder (12) having (a) a longitudinal axis (14), and (b) a single, circumferential wall; and
headers (20, 24) at opposite ends of said cylinder (12); wherein
one of said headers (20) has a tapped hole (28) formed in a surface thereof which opens onto said cylinder (12);
the other of said headers (24) has a tapped bore (38) opening therethrough; and
a first inlet vlave (30) threadedly engaged with said tapped hole (28) and confined within said cylinder (12);
a second inlet valve (30a) threadedly engaged with said tapped bore (38) and confined within said cylinder (12);
said second inlet valve (30a) has a throughgoing bore formed therein which is coaxial with said tapped bore (38);
a piston rod (40) in penetration of said bores, and having one end thereof projecting outwardly from said other header (24);
a pair of discharge valves (46, 46a) coupled to said piston rod (40), and spaced apart along said rod (40), confined within said cylinder (12);
gas inlet ports (50, 50a) radially formed in said cylinder (12) at opposite ends thereof; and
a gas outlet port (52) formed in said cylinder intermediate said ends thereof. - A gas compressor according to claim 1, wherein:
said inlet ports (50, 50a) open directly onto said cylinder-confined inlet valves (30, 30a). - A gas compressor, according to claim 1, wherein:
said discharge valves (46, 46a) have annular bodies (48); and
said bodies (48) have piston ring grooves formed thereon to accommodate therein piston rings for effecting sealing engagement with said cylinder (12). - A gas compressor, according to claim 3, wherein:
the end of said piston rod (40) which is opposite said projecting end thereof is threaded; and further including
a tubular spacer (44), internally and externally threaded, is threadedly engaged with said threaded, opposite end of said piston rod (40);
said bodies (48) are internally threaded; and
said bodies (48) are threadedly engaged with said tubular spacer (44). - A gas compressor, according to claim 4, wherein:
said spacer (44) is externally threaded, as aforesaid, at opposite ends thereof; and
said bodies (48) are threadedly engaged with said spacer (44) at said threaded ends of said spacer (44). - A gas compressor, according to claim 1, wherein:
opposite axial ends of said cylinder (12) have shouldered recesses (16, 18) formed therein;
said headers (20, 24) have circular lands (22, 26) in the centres thereof; and
said lands (22, 26) are set into said shouldered recesses (16,18). - A gas compressor, according to claim 6, further including:
seals (54) interposed between said headers (20,24) and said opposite axial ends of said cylinder (12). - A gas compressor, according to claim 6, further including:
tie rods (56) fastened to said headers (20, 24) securing said headers (20, 24) to opposite axial ends of said cylinder (12). - A gas compressor, according to claim 4, wherein:
said spacer (44), discharge valves (46, 46a), and said cylinder (12) cooperatively define, within said cylinder, a fixed volume, gas-discharge chamber which opens onto said outlet port (52). - A gas compressor, according to claim 3, wherein:
said discharge valves (46, 46a) comprise gas compressing pistons.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP19910301191 EP0498981B1 (en) | 1991-02-14 | 1991-02-14 | Gas compressor |
DE1991608706 DE69108706T2 (en) | 1991-02-14 | 1991-02-14 | Gas compressor. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP19910301191 EP0498981B1 (en) | 1991-02-14 | 1991-02-14 | Gas compressor |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0498981A1 true EP0498981A1 (en) | 1992-08-19 |
EP0498981B1 EP0498981B1 (en) | 1995-04-05 |
Family
ID=8208192
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19910301191 Expired - Lifetime EP0498981B1 (en) | 1991-02-14 | 1991-02-14 | Gas compressor |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0498981B1 (en) |
DE (1) | DE69108706T2 (en) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1568776A (en) * | 1918-09-28 | 1926-01-05 | Smith David Franklin | Compressor |
US1602193A (en) * | 1922-12-04 | 1926-10-05 | Deming Co | Pump |
FR786969A (en) * | 1935-03-09 | 1935-09-14 | F Liebault & Cie Ets | Double acting pump |
US4072210A (en) * | 1976-01-19 | 1978-02-07 | Chien Chao C | Compressor |
US4679994A (en) * | 1981-03-09 | 1987-07-14 | Allied Corporation | Piston vacuum pump |
US5011383A (en) * | 1990-01-02 | 1991-04-30 | Dresser-Rand Company | Valve assembly, for use in combination with a straight-cylinder, gas-compression chamber, and in combination therewith |
-
1991
- 1991-02-14 DE DE1991608706 patent/DE69108706T2/en not_active Expired - Lifetime
- 1991-02-14 EP EP19910301191 patent/EP0498981B1/en not_active Expired - Lifetime
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1568776A (en) * | 1918-09-28 | 1926-01-05 | Smith David Franklin | Compressor |
US1602193A (en) * | 1922-12-04 | 1926-10-05 | Deming Co | Pump |
FR786969A (en) * | 1935-03-09 | 1935-09-14 | F Liebault & Cie Ets | Double acting pump |
US4072210A (en) * | 1976-01-19 | 1978-02-07 | Chien Chao C | Compressor |
US4679994A (en) * | 1981-03-09 | 1987-07-14 | Allied Corporation | Piston vacuum pump |
US5011383A (en) * | 1990-01-02 | 1991-04-30 | Dresser-Rand Company | Valve assembly, for use in combination with a straight-cylinder, gas-compression chamber, and in combination therewith |
Also Published As
Publication number | Publication date |
---|---|
DE69108706T2 (en) | 1995-10-26 |
DE69108706D1 (en) | 1995-05-11 |
EP0498981B1 (en) | 1995-04-05 |
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