US1634247A - Compressor valve - Google Patents

Description

June 28 1927.

- 1,634,247 H. T. BLOM COMPRESSOR VALVE Original Filed July 51', 1917 2 Sheets-Sheet 1' Jim N ZhyaZmarT June 28, 1927. 1,634,247

H. T. BLOM COMPRESSOR VALVE Original Filed July 51, 1917 2 Sheets-Sheet 2 Patented June 28, 1927.

HJALIVIAR T. BLOM, OF

CHICAGO, ILLINOIS, ASSIGNOR 'lO SULLIVAN MACHINERY COM- PANY, A CORPORATION OF MASSACHUSETTS.

COMPRESSOR VALVE.

Application filed July 31, 1917, Serial No. 183,810. Renewed September 9. 1922. Serial No. 587,227.

My invention relates to compressor valves.

It has for its object to provide an 1mproved plate valve of the cage type especially adapted to air compressor service, which may be. readily inserted in lieu of poppet valves and readily removed whenever desired. A further object of my invention is to produce an improved valve in which the capacity is increased and the clearance min1 mized, the valve also being adapted to withstand long use in service with increased efficiency and without breakage of the plate members. Theseand other objects of my invention will, however, hereinafter more. fully appear.

In the accompanying drawings, I have shown for purposes of illustration one embodiment which my invention may assume in practice.

In these drawings, a

Fig. 1 is a longitudinal vertical sectional view of a compressor cylinder equipped with my improvement, with parts broken away.

Fig. 2 is a vertical sectional view of one of the inlet valve cages.

Fig. 3 is a detail in perspective of one of the inletvalve members shown in Fig. 2.

Fig. 1 is a side elevation of the cage shown in Fig. 2.

Fig. 5 is a transverse sectional view taken substantially on line 5--5 of Fig.4.

Fig. 6 is a detail side elevation of one of the guard members shown in Figs. 2, 4, and 5. I

Fig. 7 is a side elevation of one of the dis charge valve cages, with parts broken away.

Fig. 8 is a vertical sectional view taken on line 8-8 ofFig. 7.

Fig. 9 isa side elevation of one ofthe' guard members shown in Fig. 8.

Fig.

on line 10-1O of Fig. 7.

Fig. 11 is a detail in perspective of one,

of the discharge valve members shown in Fig. 8.

In this illustrative construction I have shown my invention as applied to. a compressor including a cylinder 1 having a piston 2 movable therein. the ends of the cylin der being closed by the removable heads 3 and 4. Air flows in from the cylinder intake 5 into a passage 6 communicating with valves within the inlet valve cages 7 and are disposed in the enlarged cage housing 10 is a transverse sectional View taken passing through these valves, whose cages valve pockets 8, into the opposite ends of the cylinder, is discharged after compression into the discharge valve cages 9 and through corresponding valve cage housing pockets 10 into a passage 11 communicating with the discharge pipe 12 leading to the rece ver.

Of these valves, we will first consider one of the inlet valves. It will be noted that the inlet valve cage 7 is substantially cylindric-al in form and provided with an annular laterally disposed flange 13 on its upper end adapted to seat against a corresponding flange on the head 3 surrounding an outlet 14 of the pocket 8 and thus form an airtight fit between the cageand cylinder, the outlet of the valve, as hereinafter described, being within this flange. It will also be observed that this member 7 is provided with a substantially rectangular chamber 15 extending longitudinally thereof and pro vided on its opposite sides with a plurality of ports 16, herein longitudinally disposed and spaced apart by a wall 17 ,communicating with the chamber 15 and with the passage 6 through the, pocket 8. Within the chamber 15, the valve guard members 18, are carried. As shown. these valve guard members are two in number and disposed back to back, tom portions 19 adapted to the chamber 15 and having on their opposite sides and near their upper ends sloping fluid-deflecting surfaces 20 extending from the bottom of the ports 16 to the top of the latter and tapering substantially to an apex to form a gradually enlarging outlet within the flange 13. It will be noted hereafter that maximum outlet area is found adjacent maximum width of port opening. It will also be observed that these members 18 are provided with valve engaging surfaces 21, herein shown to be formed on suitable projections 22 extending outward from the surfaces 20, the valve engaging surfaces 21 being inclined gradually backward in an are from a. point at the bottom of the ports 16 to a point at the top of the same so'that normally closed resilient, and preferably bifurcated. plate valve members 23. disposed between the ports 16 and theguards, may when opened engage with the latter with a gradual rolling effect. As shown, each of these valve members 23 comprises a plurality of resilient fingers or valves, proper come the same being provided with botsubstantially fill sponding in number to the ports 16 and connected by a marginal portion, the marginal portion of the several valve members being securely clamped over a relatively large area between the outer surfaces of the portions 19 and the adjacent walls of the chamber by means of a plurality of oppositely disposed bolts 24, which extend through the bottom of the valve casing and into the members 18, thus serving the double function of clamping the valve members 23 in place, at the same time retaining the members 18 in position. Obviously, if desired, however, additional means may be provided to hold the several parts in assembled relation, such for instance as a plurality of dowel pins 25 disposed on opposite sides of the bolt connection.

Thus, it will be noted that an entirely unitary construction is produced which is adapted to be bodily inserted in the pocket 8 formed in the head 3. If desired, this may be ground in position in the pocket, and for convenience in grinding the surface 13 again the corresponding surface of the seat, I have provided a suitable wrench engaging socket 526 in the bottom of the members 18. It will also be noted that I have provided the cage member 7 with a suitable flange 27 upon its lower end adapted to confine a suitable plate 28 having suitable apertures 29 therein adapted to facilitate the insertion or removal of the member 7. As in the usual construction, it will be noted that a suitable valve cover 30 is provided herein, the same being shown to be bolted to the head by means of bolts 31 and to carry an adjusting screw 32 which is engageable with the plate 28 and is adjustable from the exterior of the cover, the same being provided with a lock nut 33 to hold the same in the desired positions of adjustment. v

Having thus described one of the inlet valves, we will now consider one of the discharge valves. This valve, like its com panion, constitutes a unit bodily insertable in or removable from a pocket formed in the cylinder heads. In this instance, it will be noted, however, that although the valve cage 9 is provided with a flange corresponding to the flange 13 and adapted to engage with a corresponding seat in the head and be ground into position thereon, the same is of materially different shape from the member 7. As shown in F 8, this member 9 is provided on its cylinder end and at each side with asubstantially segmental grooved or chambered portion 35 and an upstanding tapered portion 36 of substantially rectangular cross section disposed between these portions As shown, this portion 36 carries clamped to its opposite surfaces inwardly disposed guard members 37 each preferably bifurcated and having a plurality of downwardly extending spaced guard fingers 38 thereon provided with valve engaging sur faces 39 thereon corresponding to the surfaces 21 and adapted to engage with valve members 40, similar to the valves 23 and clamped between the guard members 37 and the member 36 by any suitable means, herein by transversely extending bolts ll and dowels 42 located on the opposite sides of the bolts. It will also be noted that the portion 36 is provided with elongated longitudinally disposed ports l3 and that an inlet similar to the outlet of the inlet valves is formed by chambering out the center of the portion 36 and providing it with sloping fluid-deflecting walls 4st similar to the surfaces 20, the several branches being spaced apart by walls 45. As in the inlet valve construction hereinabove described, it will also be noted that the upper end of the member 36 is provided with openings 46 adapted to facilitate the grinding of the valve cage upon its seat, and that this cage is held in clamped position by means of an adjustable setscrew 47 threaded in a removable cover plate 48 suitably attached to the head, as by means of bolts 49, the screw 47 being located in any desired position of adjustment by means of a lock nut 50.

Through the use of my improved construction, it will be noted that it is possible to replace a poppet valve with a cage type plate valve of rugged form having a large effective area and which at the same time maintains the clearance within the desired limits. It will also be observed that either the inlet or discharge .valve may be inserted or removed as a unit, and that when it is desired to remove the valve members per se from the cages, these members are readily accessible, the parts going to make the several units being readily separable whenever desired. Attention is also directed to the fact that through the use of my improved construction it is possible to utilize two sets of valves on a single cage, thereby greatly increasing the valve area. It will also be noted that it is possible to receive or deliver the air at the end of the cage so that the latter may be disposed immediately adjacent the cylinder, andthat through my improved fluid-deflecting surfaces the clearance is reduced at the same time that it is made possible to utilize the full area of the parts. Obviously, through the use of my improved guard members the lift of the valve memhers is also increased without danger of breakage, and, in'the inlet valve construction, the clearance is further reduced. These and other advantages of my improved construction will, however, be clearly apparent to those skilled in the art.

While I have in this application specifically described one embodiment which my invention may assume in practice, it is to be understood that the form of the same shown herein is used for purposes of illustration and that the invention may be modified and embodied in various other forms without dearting from its spirit, it being my intention to include all such modifications within the scope of the appended claims.

ii 'hat I claim as new and desire to secure by Letters Patent is:

1. in combination, a valve cage having a 'uid opening in one of its ends and oppo tely disposed ports opening through the )eripiery of the cage and communicating i 'ough the interior of said cage with said "mid opening, fluid deflecting means within said cage between said ports and having opposed deflecting surfaces facing said ports, and valves disposed on the opposite sides of said deflecting means and enclosing the latter between them, said valves having free ends adjacent said opening and approaching each other on opening of said valves.

in combination, a valve cage having liuid opening in one of its ends and oppositely disposed ports opening through the periphery of the cage at opposite sides of the atter and communicating through the 1nterior of said cage with said fluid opening, fluid deflecting means within said cage between said ports, and valves enclosing said i'neans and having free ends adjacent said opening, said valves normally closing said ports and the free ends of said valves appreaching each other on opening movement.

In combination, a valve cage having a fluid opening in one of its ends and oppositely disposed ports opening through the side of said cage and communicating through the interior of said cage with said fluid opening, fluid deflecting means within said cage having sloping surfaces intersecting adjacent said opening, and valves disposed on the opposite sides of said means and having free ends adjacent said opening and approaching each other on opening of said valves.

l. in combination, a valve cage having a longitudinally disposed chamber therein providcd with an end opening and lateral ports communicating therewith, resilient valves in said chamber having free ends adjacent said opening and corresponding in number to said ports and disposable over the latter, and means disposed between said valves in said chamber for directing the fluid to the open end of said chamber.

In combination, a valve cage having a longitudinally disposed chamber therein provided with an opening, a plurality of mei'nbers car 'ied adjacent said chamber having surfaces leading toward said opening,

and resilient valves having free ends adjacent said opening and clamped betw en said members and the walls of said chamber.

6. In combination, a valve cage havin a fluid opening in its end and an upstandstanding portion having oppositely disposed lateral ports communicating with said opening andsurfaces directing the fluid after its flow through said ports, and plurality of valves clamped to said portion and normally disposed over said ports, said valves having free ends adjacent said opening.

8. In combination, a valve cage having an opening in one of its ends and an upstanding portion having oppositely disposed lateral ports communicating with said opening, means for directing the fluid after its flow through said ports, a plurality of valves clamped to said portion and normally disposed over said ports, said valves having free ends adjacent said opening, and a plurality of guard men'ibers carried on said upstanding portion.

9. In combination, a valve cage having an opening in one of its ends and an upstanding portion having oppositely disposed lateral ports communicating with said opening, means directing the fluid after its flow through said ports, a plurality of flexible valves clamped to said portion and normally disposed over said ports, said valves having free ends adjacent said opening, and a plurality of guard members carried on said upstanding portion having curved valve engaging surfaces.

10. In combination, a valve cage having an opening in its end and a plurality of communicating oppositely disposed lateral ports surrounded by valve seat surfaces lying in parallel planes, guard means disposed opposite each of said ports, valves individual to each of said ports cooperating with said seat surfaces and having free ends adjacent said end opening, and flow directing means within said cage comprising surfaces intersecting to form a dihedral angle whose edge is parallel to said seat surfaces and adjacent the open end of said cage.

In testimony whereof I aflix my signature.

HJALMAR T. BLOM.

Certificate of Correction.

Patent No. 1,634,247. Granted June 28, 1927, to HJALMAR T. BLOM.

It is hereby certified that error appears in the printed specification of the abovenuinbered patent requiring correction as follows: Page 1, line 87, for the Word chamber read chambers; page 2, line 3, for the word portion read portions, and line 24, for the Word again read against; and that the said Letters Patent should be read With these corrections therein that the same may conform to the record of the case in the Patent Ofiice.

Signed and sealed this 4th day of October, A. D. 1927.

[SEAL.] M. J. MOORE,

Acting Uonwnissioner of Patents.

Images