CA1287786C - Coupling and seal assembly - Google Patents
Coupling and seal assemblyInfo
- Publication number
- CA1287786C CA1287786C CA 571349 CA571349A CA1287786C CA 1287786 C CA1287786 C CA 1287786C CA 571349 CA571349 CA 571349 CA 571349 A CA571349 A CA 571349A CA 1287786 C CA1287786 C CA 1287786C
- Authority
- CA
- Canada
- Prior art keywords
- cylinder
- plunger
- annular
- coupling
- seal
- 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
Links
Landscapes
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
Abstract
COUPLING AND SEAL ASSEMBLY
Abstract of the Disclosure The Assembly couples a plunger, at one end thereof, to a ram without bolting (with a resilient retaining ring) and receives the other plunger end in a high-pressure cylin-der through centering and sealing components combined within the cylinder. No elements of the Assembly are bolted together; the centering and sealing components are secured in the cylinder only by a single retaining ring.
Abstract of the Disclosure The Assembly couples a plunger, at one end thereof, to a ram without bolting (with a resilient retaining ring) and receives the other plunger end in a high-pressure cylin-der through centering and sealing components combined within the cylinder. No elements of the Assembly are bolted together; the centering and sealing components are secured in the cylinder only by a single retaining ring.
Description
This invention pertains to coupling and sea]. assemblies, and in particular to a novel coupliny and seal assembly having an especial utility in a high-pressure, liquid in-tensifier, or the like.
~nown coupling and seal assemblies, such as are used in high-pressure, liquid intensifiers, for instancer present laborious assembly and disassembly procedures, and are expensive of manufacture. Commonl~-, such assemblles com-prise bolting; the bolt5 are subject to fretting, dam-aging over-torquing, or dangerous under-torq~ing, and are exposed to the liquid and, consequently, accrete chemical deposits and become ouite difficult to remove. Too, the practice of bolting these assemblies, of course, requires tapped holes in receiving components, and this is unduly expensive, requires correct alignment of bolted elements on assembly (or reassembly), and diminishes the struc-tural integrity of the tapped, receiving components.
~hat has been needed, and is the object of this inven-tion, is a coupling and seal assembly which has little or none of the aforecited disadvantages.
Particularly, it is an object of this invention to set forth a coupling and seal assembly, for use in a high-pressure, liquid intensifler, or the like, comprising a cylinder; means at one end of said cylinder for admitting pressured liquid into said cylinder; a plunger; a ram;
means engaging both said ram and an end of said plunger, removably coupling said ram to said end of said plunger;
and apertured means, in the other end of said cylinder, for (a) slidably receiving said plunger therewithin, and (b) centering said plunger in said cylinder; wherein said receiving and centering means includes means for sealing said cylinder against leakage of liquid therefrom via 7~36 said other end thereof; and ~urther includlng means securing said receiving and centering means in said cy-linder against removal thereof via said other e.nd; said securing means being but a single retaining ring.
Further objects of this invention, as well as the novel features thereof, will become more apparent by reference to the following description taXen in conjunction with the accompanying figures, in which:
Figure 1 is a cross-sectional vieT.~ of a high-pressure cylinder assembly, in a liquid intensifier, the same being taken along the longitudinal axis thereof;
Figure 2 is a cross-sectioned, partly exploded, view of an embodiment of the instant invention;
Figure 3 is a cross-sectional view taken along sec-tion 3-3 of Figure 2; and Figure 4 is an end view of the ram, split collar, and collar retainer, taken along 4-4 of Figure 2.
As shown in Figure 1, a prior art high-pressure cylinder assembly 10 comprises a casing 12 in which is confined a high-pressure cylinder 14. The cylinder 1~ confines a plunger 16 therewithin, and plunger/cylinder sealing ele-ments 18. A ram 20 is removably coupled to the headed, extended end 22 of the plunger 16. The outermost end 24 of the cylinder 1~ abuts an end plate 26 which is secured to the cylinder 14 by bolts 28 (only one is shown), and secured to the casing 12 by bolts 300 The coupling and seal assembly 32 of this prior art ar-rangement is generally encompassed by the bracketed por-tion sho~n in Figure 1. It can be noted t~at an end cap34 is fastened to the inner end 36 of the c~linde.r 1~ by bolts 38 (only one is shown). Consequently, the end 36 of the cylinder 14 has had to have a plurality of tapped holes 40 formed therein, and the end cap 34 has a corres-ponding number of bolt holes 42 formed therein.
A conduit 44 for high-pressure liquid has a head portion 46 which is captive in the cylinder 14 and extends beyond the cylinder 14 with a threaded, terminal end 48. A bolt 50 secures the end 48 fast in the plate 26. It needs to be understood that while not shown thus, for simplicity, the instant invention, the coupling and seal assembly 52 of Figure 2 (and 3 and 4) is incorporated in a li~e high-pressure cylinder assem~ly -- having a casing 12, plate 26, conduit 44, etc. -- but is of greatly simpli-fied construction, and omits the end cap 34, bolts 3~3, tapped holes 40 and bolt holes 42 (of Figure 1).
Coupling and seal assembly 52 comprises a high-pressure cylinder 54, a plunger 56 and a ram 53. An end 60 of the plunger 56 has a cleft-shaped, annular groove 62 formed therein. A collar of two pieces 64 and 64a is fitted to plunger end 60; each piece 64 and 64a has an inwardly-directed, arcuate ridge 66, and the latter engage the groove 62 to close the collar about the plunger end 60.
A cup-shaped, centrally bored, collar retainer 68 slid-ably fits about the collared end of the plunger and, in turn, is snugly received in the thereadjacent end of the ram 58.
~7~
The aforesaid end of the ram 58 has a cyllndri.cal. poclcet 70 formed therein with an annular, i.nwarclly-extending walL 72.
Adjacent an outer end thereof, the pocket 70 hais an annular groove 74 formed in an lnner surface thereof. The wall 72 and groove 74 are spaced apart a given dimension, and the collar retainer 68 has a depth, or a~ial length "~" which is substan-tially the same given dimension. A retaining ring 76 is received in the groove 74, to secure the collar 64, 64a and collar retainer 68 in the pocket 70. The aforesaid substantially same dimensions, and wall 72 and ring 76, provide for a snug reception and fit of retainer 68 (and collar 64, 64a) in the pocket 70.
Within the high-pressure cylinder 54 are a series of com-ponents which serve to receive and center the working end 78 of the plunger 56, and to seal the cylinder against leakage of fluid therefrom. The innermost component is a - 3a ~
`~2~;t7~
seal 80 which sealingly en~ages the wall o~ the cyli~der 5~ and ~he outside-diameter surface or the piuncJ~r 56.
Seal 80 is set against a seal seat 82. In tur~, the seat 82 abuts a ~ey~positioning sleeve 84, a~d a three-piece 5 key a6 which nests in an annular keyway 87 formed in the cylinder 54.
The cylinder 54 has an annular shoulder 88 formed therein adjacent to the end thereof, and the sleeve 84 has an out-.~ardly-extending flange 90 which sets into the shoulder 88. Finally, the cylinder 54 also has an inner, circumferential groove 92 in which is recelved a resili-ent retaining ring 94. The latter secures the sleeve 84 in place, and the outer surface of the sleeve 84 com-prises a land which slidably receives and radially posi-tions the three piece key 86.
As shown in Figure 3, the key 86 has t-~o, mir-or-imaged pieces 86a and 86b; the third piece 86c is the smaller, and is of outwardl~-diverging confiquration.
On cisassembly, ring 94 is removed f-om groove 92 to per-20 mit removal of the sleeve 84 and the kev pieces 86a, a6b and 86c. To extract the seat 82 and seal 80, liquid is admitted into the cylinder 54 to fill it, and the plunger 56 is thrust thereinto. Displacement of the liquid by the ~lunger 56 forces the seal 80 and seat 82 to remove from the cylinder.
While I have described my invention in connection with a specific embodiment thereof, it is to be clearly under-stood that this is done only by way of example, and not as a limita-tion to the scope of my invention as set forth in the objects thereof and in the appended claims.
.. . ~ . , . _ _ .. . ~ _ ._ _ . . , .. _ _ ._ _ . . .. -- .. .. _ _ _ . . . , _. ._ . .. . . _ . ..
~nown coupling and seal assemblies, such as are used in high-pressure, liquid intensifiers, for instancer present laborious assembly and disassembly procedures, and are expensive of manufacture. Commonl~-, such assemblles com-prise bolting; the bolt5 are subject to fretting, dam-aging over-torquing, or dangerous under-torq~ing, and are exposed to the liquid and, consequently, accrete chemical deposits and become ouite difficult to remove. Too, the practice of bolting these assemblies, of course, requires tapped holes in receiving components, and this is unduly expensive, requires correct alignment of bolted elements on assembly (or reassembly), and diminishes the struc-tural integrity of the tapped, receiving components.
~hat has been needed, and is the object of this inven-tion, is a coupling and seal assembly which has little or none of the aforecited disadvantages.
Particularly, it is an object of this invention to set forth a coupling and seal assembly, for use in a high-pressure, liquid intensifler, or the like, comprising a cylinder; means at one end of said cylinder for admitting pressured liquid into said cylinder; a plunger; a ram;
means engaging both said ram and an end of said plunger, removably coupling said ram to said end of said plunger;
and apertured means, in the other end of said cylinder, for (a) slidably receiving said plunger therewithin, and (b) centering said plunger in said cylinder; wherein said receiving and centering means includes means for sealing said cylinder against leakage of liquid therefrom via 7~36 said other end thereof; and ~urther includlng means securing said receiving and centering means in said cy-linder against removal thereof via said other e.nd; said securing means being but a single retaining ring.
Further objects of this invention, as well as the novel features thereof, will become more apparent by reference to the following description taXen in conjunction with the accompanying figures, in which:
Figure 1 is a cross-sectional vieT.~ of a high-pressure cylinder assembly, in a liquid intensifier, the same being taken along the longitudinal axis thereof;
Figure 2 is a cross-sectioned, partly exploded, view of an embodiment of the instant invention;
Figure 3 is a cross-sectional view taken along sec-tion 3-3 of Figure 2; and Figure 4 is an end view of the ram, split collar, and collar retainer, taken along 4-4 of Figure 2.
As shown in Figure 1, a prior art high-pressure cylinder assembly 10 comprises a casing 12 in which is confined a high-pressure cylinder 14. The cylinder 1~ confines a plunger 16 therewithin, and plunger/cylinder sealing ele-ments 18. A ram 20 is removably coupled to the headed, extended end 22 of the plunger 16. The outermost end 24 of the cylinder 1~ abuts an end plate 26 which is secured to the cylinder 14 by bolts 28 (only one is shown), and secured to the casing 12 by bolts 300 The coupling and seal assembly 32 of this prior art ar-rangement is generally encompassed by the bracketed por-tion sho~n in Figure 1. It can be noted t~at an end cap34 is fastened to the inner end 36 of the c~linde.r 1~ by bolts 38 (only one is shown). Consequently, the end 36 of the cylinder 14 has had to have a plurality of tapped holes 40 formed therein, and the end cap 34 has a corres-ponding number of bolt holes 42 formed therein.
A conduit 44 for high-pressure liquid has a head portion 46 which is captive in the cylinder 14 and extends beyond the cylinder 14 with a threaded, terminal end 48. A bolt 50 secures the end 48 fast in the plate 26. It needs to be understood that while not shown thus, for simplicity, the instant invention, the coupling and seal assembly 52 of Figure 2 (and 3 and 4) is incorporated in a li~e high-pressure cylinder assem~ly -- having a casing 12, plate 26, conduit 44, etc. -- but is of greatly simpli-fied construction, and omits the end cap 34, bolts 3~3, tapped holes 40 and bolt holes 42 (of Figure 1).
Coupling and seal assembly 52 comprises a high-pressure cylinder 54, a plunger 56 and a ram 53. An end 60 of the plunger 56 has a cleft-shaped, annular groove 62 formed therein. A collar of two pieces 64 and 64a is fitted to plunger end 60; each piece 64 and 64a has an inwardly-directed, arcuate ridge 66, and the latter engage the groove 62 to close the collar about the plunger end 60.
A cup-shaped, centrally bored, collar retainer 68 slid-ably fits about the collared end of the plunger and, in turn, is snugly received in the thereadjacent end of the ram 58.
~7~
The aforesaid end of the ram 58 has a cyllndri.cal. poclcet 70 formed therein with an annular, i.nwarclly-extending walL 72.
Adjacent an outer end thereof, the pocket 70 hais an annular groove 74 formed in an lnner surface thereof. The wall 72 and groove 74 are spaced apart a given dimension, and the collar retainer 68 has a depth, or a~ial length "~" which is substan-tially the same given dimension. A retaining ring 76 is received in the groove 74, to secure the collar 64, 64a and collar retainer 68 in the pocket 70. The aforesaid substantially same dimensions, and wall 72 and ring 76, provide for a snug reception and fit of retainer 68 (and collar 64, 64a) in the pocket 70.
Within the high-pressure cylinder 54 are a series of com-ponents which serve to receive and center the working end 78 of the plunger 56, and to seal the cylinder against leakage of fluid therefrom. The innermost component is a - 3a ~
`~2~;t7~
seal 80 which sealingly en~ages the wall o~ the cyli~der 5~ and ~he outside-diameter surface or the piuncJ~r 56.
Seal 80 is set against a seal seat 82. In tur~, the seat 82 abuts a ~ey~positioning sleeve 84, a~d a three-piece 5 key a6 which nests in an annular keyway 87 formed in the cylinder 54.
The cylinder 54 has an annular shoulder 88 formed therein adjacent to the end thereof, and the sleeve 84 has an out-.~ardly-extending flange 90 which sets into the shoulder 88. Finally, the cylinder 54 also has an inner, circumferential groove 92 in which is recelved a resili-ent retaining ring 94. The latter secures the sleeve 84 in place, and the outer surface of the sleeve 84 com-prises a land which slidably receives and radially posi-tions the three piece key 86.
As shown in Figure 3, the key 86 has t-~o, mir-or-imaged pieces 86a and 86b; the third piece 86c is the smaller, and is of outwardl~-diverging confiquration.
On cisassembly, ring 94 is removed f-om groove 92 to per-20 mit removal of the sleeve 84 and the kev pieces 86a, a6b and 86c. To extract the seat 82 and seal 80, liquid is admitted into the cylinder 54 to fill it, and the plunger 56 is thrust thereinto. Displacement of the liquid by the ~lunger 56 forces the seal 80 and seat 82 to remove from the cylinder.
While I have described my invention in connection with a specific embodiment thereof, it is to be clearly under-stood that this is done only by way of example, and not as a limita-tion to the scope of my invention as set forth in the objects thereof and in the appended claims.
.. . ~ . , . _ _ .. . ~ _ ._ _ . . , .. _ _ ._ _ . . .. -- .. .. _ _ _ . . . , _. ._ . .. . . _ . ..
Claims (7)
1. A coupling and seal assembly, for use in a high-pressure, liquid intensifier, or the like, comprising a cylinder;
means at one end of said cylinder for admitting pressured liquid into said cylinder;
a plunger;
a ram;
means engaging both said ram and a first end of said plunger, removably coupling said ram to said first end of said plunger; and apertured means, in the other end of said cylinder (a) slidably receiving said plunger therewithin, and (b) centering said plunger in said cylinder, wherein said receiving and centering means includes means for sealing said cylinder against leakage of liquid therefrom via said other end thereof; and further including means securing said receiving and centering means in said cylinder against removal thereof via said other end;
said securing means being but a single retaining ring; wherein said sealing means comprises an annular seal seal-ingly engaged with a second end of said plunger and with said cylinder;
said receiving and centering means further includes an annular seal seat (a) receiving said seal thereagainst, and (b) set about said second end of said plunger;
said receiving and centering means also includes keying means set in said cylinder, receiving said seal seat thereagainst, and obstructing removal of said seal seat and seal via said other end of said cylinder;
said receiving and centering means further includes annular means, for positioning said keying means, said about said second end of said plunger;
said annular, positioning means has a circumferen-tial land;
said keying means is slidably engaged with said land and is concentric with said annular, positioning means;
said annular, positioning means comprises a sleeve having an outwardly-extending flange;
said cylinder has an annular, recessed shoulder formed in said other end thereof; and said flange of said positioning means is set against said shoulder.
means at one end of said cylinder for admitting pressured liquid into said cylinder;
a plunger;
a ram;
means engaging both said ram and a first end of said plunger, removably coupling said ram to said first end of said plunger; and apertured means, in the other end of said cylinder (a) slidably receiving said plunger therewithin, and (b) centering said plunger in said cylinder, wherein said receiving and centering means includes means for sealing said cylinder against leakage of liquid therefrom via said other end thereof; and further including means securing said receiving and centering means in said cylinder against removal thereof via said other end;
said securing means being but a single retaining ring; wherein said sealing means comprises an annular seal seal-ingly engaged with a second end of said plunger and with said cylinder;
said receiving and centering means further includes an annular seal seat (a) receiving said seal thereagainst, and (b) set about said second end of said plunger;
said receiving and centering means also includes keying means set in said cylinder, receiving said seal seat thereagainst, and obstructing removal of said seal seat and seal via said other end of said cylinder;
said receiving and centering means further includes annular means, for positioning said keying means, said about said second end of said plunger;
said annular, positioning means has a circumferen-tial land;
said keying means is slidably engaged with said land and is concentric with said annular, positioning means;
said annular, positioning means comprises a sleeve having an outwardly-extending flange;
said cylinder has an annular, recessed shoulder formed in said other end thereof; and said flange of said positioning means is set against said shoulder.
2. A coupling and seal assembly according to claim 1 wherein:
said keying means comprises at least three segments each of said segments has a peripheral, arcuate key formed thereon;
said cylinder has an annular groove or keyway formed therein; and said keys of said segments nest in said keyway.
said keying means comprises at least three segments each of said segments has a peripheral, arcuate key formed thereon;
said cylinder has an annular groove or keyway formed therein; and said keys of said segments nest in said keyway.
3. A coupling and seal assembly according to claim 1 wherein:
said other end of said cylinder has an annular channel formed therein, in immediate adjacency to, and concentric with, said shoulder, in which, removably, to receive said retaining ring;
said channel being outboard of said shoulder, relative to said other end of said cylinder.
said other end of said cylinder has an annular channel formed therein, in immediate adjacency to, and concentric with, said shoulder, in which, removably, to receive said retaining ring;
said channel being outboard of said shoulder, relative to said other end of said cylinder.
4. A coupling and seal assembly according to claim 1 wherein:
said first end of said plunger has a cleft formed in a portion thereof;
a collar is set about said portion and has a ridge extending inwardly thereof which latchingly engages said cleft to retain said collar in said set position.
said first end of said plunger has a cleft formed in a portion thereof;
a collar is set about said portion and has a ridge extending inwardly thereof which latchingly engages said cleft to retain said collar in said set position.
5. A coupling and seal assembly according to claim 4 wherein:
said ram-to-plunger means comprises a generally cup-shaped, centrally bored, collar retainer; and said retainer is slidably engaged with said first end of said plunger, via the central bore therein, and confines said collar therewithin.
said ram-to-plunger means comprises a generally cup-shaped, centrally bored, collar retainer; and said retainer is slidably engaged with said first end of said plunger, via the central bore therein, and confines said collar therewithin.
6. A coupling and seal assembly according to claim 4 wherein:
said collar comprises a plurality of parts.
said collar comprises a plurality of parts.
7. A coupling and seal assembly according to claim 5 wherein:
said ram has a cylindrical pocket formed in an end thereof, an annular groove for a retaining ring, and an annular wall extending inwardly thereof and spaced apart from said groove a given dimension; and said retainer has an axial length of substantially said same given dimension; whereby said retainer is snugly received in said pocket.
said ram has a cylindrical pocket formed in an end thereof, an annular groove for a retaining ring, and an annular wall extending inwardly thereof and spaced apart from said groove a given dimension; and said retainer has an axial length of substantially said same given dimension; whereby said retainer is snugly received in said pocket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 571349 CA1287786C (en) | 1988-07-07 | 1988-07-07 | Coupling and seal assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 571349 CA1287786C (en) | 1988-07-07 | 1988-07-07 | Coupling and seal assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1287786C true CA1287786C (en) | 1991-08-20 |
Family
ID=4138336
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 571349 Expired CA1287786C (en) | 1988-07-07 | 1988-07-07 | Coupling and seal assembly |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1287786C (en) |
-
1988
- 1988-07-07 CA CA 571349 patent/CA1287786C/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |