US750400A - Wilhelm schmidt - Google Patents
Wilhelm schmidt Download PDFInfo
- Publication number
- US750400A US750400A US750400DA US750400A US 750400 A US750400 A US 750400A US 750400D A US750400D A US 750400DA US 750400 A US750400 A US 750400A
- Authority
- US
- United States
- Prior art keywords
- piston
- valve
- steam
- pistons
- channels
- 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 - Lifetime
Links
- 238000010438 heat treatment Methods 0.000 description 16
- 238000010276 construction Methods 0.000 description 8
- 239000007787 solid Substances 0.000 description 6
- 238000001816 cooling Methods 0.000 description 4
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/8593—Systems
- Y10T137/86493—Multi-way valve unit
- Y10T137/86574—Supply and exhaust
- Y10T137/8667—Reciprocating valve
- Y10T137/86694—Piston valve
- Y10T137/8671—With annular passage [e.g., spool]
Definitions
- WILHELM SCHMIDT OF WILHELMSHOHE, NEAR CASSEL, GERMANY.
- My invention relates to improvements in piston-valves for steam-engines, and has especially for its purpose to provide a solid pistonvalve without any piston-rings, in which piston-valve means are provided to avoid awearing out of the valve-piston and of the valvechest.
- FIG. 1 is a longitudinal section of the valvechest provided with my new arrangement.
- Fig. 2 is a cross-section on lineA B of Fig. 1.
- Fig. 3 is a longitudinal and a cross section of a modified construction of the valve-piston.
- Fig. 1 is a section on line C D of Fig. 1.
- the piston-valves are constructed for double admission after the manner of the so-called trick-valves. Contrary to the constructions known up to date the admission takes place from the middle of the-yalve-chests between the two valve-pistons.
- This arrangement has the advantage that in case of superheated steam being used the stufiing-boxes work only in the exhaust-steam, and only a very small part of the valve-chest comes in contact with the superheated steam.
- the valve-pistons a are situated in removable bushings b, in which an annular channel Z) is provided. This channel b can either be cast in, as shown on the right-hand side ofFig.
- a groove can be turned in, which groove is closed by the valvechest cover 0, as shown on the left-hand side of Fig. 1.
- the annular channels 6 are connected with the admission-room by means of channels .9, situated on the outside of the bushings, so that in case the steam enters the valvechest this steam immediately enters the channels s and the annular channels I), hereby effecting an equal heating of the whole bushings b.
- valve-pistons can be constructed so as to avoid too rapid a heating of the same.
- an isolating-cover a may be provided at the inside of the valve-piston, leaving an annular channel a between this cover and the piston proper, as shown on the righthand side of Fig. 1.
- FIG. 3 another construction of the valvepiston a is shown.
- the annular channel a situated at the side toward the entrance of the steam, is connected, by means of channels t, with the other side of the piston -that is to say, with the side at which the exhaust-steam leaves the valve-chest. It is hereby attained that the exhaust-steam enters the channel a through the channels tand herewith effects a cooling of the valve-piston.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Lift Valve (AREA)
Description
PATENTED JAN. 26, 1904.
W. SCHMIDT. PISTON VALVE FOR STEAM ENGINES.
APPLICATION FILED SEPT. 27, 1901.
N0 MODEL.
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fatentd .Iamiary 26, 1904.
PATENT OFFICE.
WILHELM SCHMIDT, OF WILHELMSHOHE, NEAR CASSEL, GERMANY.
PISTON-VALVE FOR STEAM-ENGINES;
SPECIFICATION forming part of Letters Patent No. 750,400, dated January 26, 1904.
Application filed September 27, 1901. Serial No. 76,770. (No model.)
To all whom it may concern:
Be it known that I, WILHELM SCHMIDT, a subject of the King of Prussia, German Emperor, and a resident of Wilhelmshohe, near Cassel, in the Province of Hesse-Nassau, German Empire, haveinvented certain new and useful Improvements in Piston Valves for Steam-Engines, of which the following is an exact specification.
My invention relates to improvements in piston-valves for steam-engines, and has especially for its purpose to provide a solid pistonvalve without any piston-rings, in which piston-valve means are provided to avoid awearing out of the valve-piston and of the valvechest.
My invention is represented in the accompanying drawings, in which Figure 1 is a longitudinal section of the valvechest provided with my new arrangement. Fig. 2 is a cross-section on lineA B of Fig. 1.
' Fig. 3 is a longitudinal and a cross section of a modified construction of the valve-piston. Fig. 1 is a section on line C D of Fig. 1.
It is known that piston-valves with solid pistons without any piston-rings have the great advantage of a simple construction in which the wearing out of the valves is nearly perfectly avoided. Up to date it was not possible to use such solid valve-pistons for large engines, as in case the valve-pistons were fitted in tight enough to avoid great losses of steam a fraying and chocking of the pistons easily took place on account of differences in the heating of the piston and the valve-chest and the different expansion hereby effected. In order to avoid this disadvantage, I provide means for equally heating the valve-piston and the valve-chest and herewith efiecting always an equal expansion of these parts.
The piston-valves are constructed for double admission after the manner of the so-called trick-valves. Contrary to the constructions known up to date the admission takes place from the middle of the-yalve-chests between the two valve-pistons. This arrangement has the advantage that in case of superheated steam being used the stufiing-boxes work only in the exhaust-steam, and only a very small part of the valve-chest comes in contact with the superheated steam. The valve-pistons a are situated in removable bushings b, in which an annular channel Z) is provided. This channel b can either be cast in, as shown on the right-hand side ofFig. 1, or a groove can be turned in, which groove is closed by the valvechest cover 0, as shown on the left-hand side of Fig. 1. The annular channels 6 are connected with the admission-room by means of channels .9, situated on the outside of the bushings, so that in case the steam enters the valvechest this steam immediately enters the channels s and the annular channels I), hereby effecting an equal heating of the whole bushings b.
In order to attain a still better effect, the valve-pistons can be constructed so as to avoid too rapid a heating of the same. In order to attain this, an isolating-cover a may be provided at the inside of the valve-piston, leaving an annular channel a between this cover and the piston proper, as shown on the righthand side of Fig. 1.
In Fig. 3 another construction of the valvepiston a is shown. In this construction the annular channel a, situated at the side toward the entrance of the steam, is connected, by means of channels t, with the other side of the piston -that is to say, with the side at which the exhaust-steam leaves the valve-chest. It is hereby attained that the exhaust-steam enters the channel a through the channels tand herewith effects a cooling of the valve-piston.
In case of large valve-chests a still better and more equal heating of the bushings b can be attained by providing a second annular channel 6 around these bushings.
In case of highly-superheated steam being used it will be advantageous to provide at the same time means for heating the bushings b and preventing too rapid a heating of the pistons a or effecting a cooling of the same.
Having thus fully described the nature of this invention, what I desire to secure by Letters Patent of the United States is- 1. In piston-valves for steam-engines, the combination with a valve-piston, of a removable bushing forming the valve-seat, annular channels provided in said bushing, and channels connecting said annular channels to the heating the bushings by the admission-steam and the piston by the exhaust-steam, substantially as described and for the purpose set forth.
In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.
WILHELM SCHMIDT.
Witnesses:
WOLDEMAR HAUPT, HENRY HASPER.
Publications (1)
Publication Number | Publication Date |
---|---|
US750400A true US750400A (en) | 1904-01-26 |
Family
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Family Applications (1)
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US750400D Expired - Lifetime US750400A (en) | Wilhelm schmidt |
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