US404529A

US404529A - Stuffing-box

Info

Publication number: US404529A
Authority: US
Publication date: 1889-06-04
Anticipated expiration: 1906-06-04

Description

(No Model.)

L. O. S. FRIOK.

STUFFING BOX.

No. 404,529. Patented June 4, 1889.

UNITED STATES PATENT @FFICE.

LOUIS O. S. FRIOK, OF BUFFALO, NElV YORK.

STU FFING-BOX.

SPECIFICATION forming part of Letters Patent No. 404,529, dated June 4, 1889.

Application filed March 3, 1888. Serial No. 266,057. (No model.)

To all whom it may concern:

Be it known that I, LOUIS O. S. FRIOK, of the city of Buffalo in the county of Erie and State of New York, have invented new and useful Improvements in Stuffing-Boxes, of

which the following is a specification.

This invention relates to a stufiing-box for locomotive and other horizontal engines, and more particularly to that class of stuffingboxes in which a metallic packing is employed.

My invention has forits object to provide a reliable and simple packing of this character which is comparatively inexpensive and which can be readily renewed when required.

The invention consists to that vend of the improvements which will be hereinafter fully described, and pointed out in the claim.

In the accompanying drawings, Figure 1 is a longitudinal sectional elevation of my improved stuffing-box applied to the piston-rod of a steam-cylinder. Fig. 2 is across-section in line x 00, Fig. 1. Fig. 3 is a side elevation of the metallic packing, showing the two halves thereof separated. Fig. 4 is an end elevation of the halves of said packing separated. Fig. 5 is a cross-section of the follower and the spring bearing against the same.

Like letters of reference refer to like parts in the several figures.

A represents the head of the cylinder, which is provided on its outer side with a cylindrical stufiing-box A, and B is the piston-rod passing through the head A and the stuffingbox.

5 0 represents a gland fitting into the outer end of the stuiiing-box A and adjustab'ly secured to the latter by bolts a, passing through the gland. A tight joint is formed between the gland O and the outer end ofthe stuffingbox A by means of a packing-ring c, of copper or other suitable material, arranged between these parts or in any other suitable manner.

D is a bushing, preferably provided with an outwardly-tapering exterior surface seated in 5 a tapering cavity formed in the gland C. The

bushing D is provided with an outwardly-tapering cavity (1. The inner end of the bushin g is provided with an annular flange or collar d, which fits into an annular depression formed in the inner end of the gland O and prevents the steam or other fluid from escaping through the bore of the gland.

E represent-s the packing of soft getal surforwardly-taperin g portion in the concave cavity cl of the bushing D. The metallic packing E is divided longitudinally into two halves or sections e e, which embrace opposite sides of the piston-rod. The sections 6 e are provided at their contiguous longitudinal faces with interlocking projections and recesses f f f 2 f as shown in Figs. 1, 3, and 4, whereby tight joints are formed between the sections.

g represents a ring or follower arranged within the stuffing-box A, behind the packingsections e e, and provided with a concave seat or depression g, which bears against the rearwardly-taperin g ends of said sections.

H is a volute spring surrounding the pistonrod, and bearing with its front end against the rear side of the follow-er g and with its rear end against a recessed ring 1T, arranged in the rear end of the stuffing-box A. The spring H presses the follower 9 against the rear ends of the packing-sections e e, thereby forcing the latter into the tapering cavity d and compressing the sections tightly around the piston-rod. The rear portions of the packingsections are compressed directly by the ring g, embracing the same, and the front portions of the packing'sections are compressed by being driven into the tapering cavity of the bushing.

The external diameter of the bushing D is somewhat smaller than that of the bore of the gland O, as shown, to give the bushing a slight vertical play in the gland, so that as the piston-rod and cross-head of the engine descend slightly by wear the bushing will take part in this sinking of the piston-rod and thereby prevent binding of the same.

j is a ring of felt or other suitable material surrounding the piston-rod in front of the packing-sections e c, and whereby the rod is kept clean. The ring j bears against the outer end of the bushing D and against an annular shoulder 70, formed in the bore of the gland 0 near the outer end thereof, and is held in its seat by a ringZ, secured in a depression in the outer end of the gland.

The opening in the ring Zis somewhat larger than the piston-rod B, as shown, to allow the rod to descend slightly as the cross-head of the engine becomes worn.

Upon removing the nuts of the bolt 0 the gland C and bushing D can be moved on the piston-rod away from the end of the stuffing box A, and the packing-sections e 6 can be removed when worn and be replaced by new sections, if required. The followerg retains the packing-sections c e in their seat (Z at all times and automatically takes up the wear of the same,while the parts are properly adjusted by means of the bolts 0 of the gland C.

It will be observed that the bushing is seated so as to be steam-tight at two points, the collar (1' fitting into an annular depression in the gland at one end and the bushing bearing against the annular shoulder k of the gland near the other end. At the same time provision is made that the bushing D, piston-rod, and packing E may all descend together, preserving their proper relations to each other in case of wear of the piston-rod and cross-head, because a space is left between the pistonrod and ringl and between all parts of the bushing and the gland.

It will also be observed that the bushing has a tapering concavity (Z, which is not concentric with the oval or curved surface of the packing E. By this construction any settlement due to wear is accommodated without interfering with the proper fit between the packing and the bushing, and at the same time space is left in the bushing for the packing to be pressed into its seat farther. Where the cavity and the packing are made tapering and in parallel lines, the settlement due to wear of the piston or cross-head destroys the accurate fit or seating of the packing within the tapering cavity of the bushing. The form I have adopted does away with this difficulty and preserves the seating of the packing within the cavity of the bushing perfect, notwithstanding any settlement of the piston-rod due to wear.

I claim as my invention- The combination, with the stufling-box A, of the gland C, provided with a tapering cavity, the tapering bushing loosely fitting all around its sides in said cavity so as to leave an annular space, the flange (1, the shoulder 70, the oval-shaped packing E, fitting in an oval cavity in the bushing so as to leave a space d between the two, an d the ring Z, loosely fitting around the piston, whereby provision is made for the settlement of the piston by wear, so as to preserve the fit of all the parts, substantially as set forth.

\Vitnessiuy hand this 16th day of February, 1888. I

LOUIS C. S. FRIUK. \Vitnesses:

CHESTER D. Ilown FRED O. Gnvnn.