DE491319C - Piston gate valve for steam extraction in single-cylinder steam engines - Google Patents

Piston gate valve for steam extraction in single-cylinder steam engines

Info

Publication number
DE491319C
DE491319C DES90749D DES0090749D DE491319C DE 491319 C DE491319 C DE 491319C DE S90749 D DES90749 D DE S90749D DE S0090749 D DES0090749 D DE S0090749D DE 491319 C DE491319 C DE 491319C
Authority
DE
Germany
Prior art keywords
cylinder
steam
piston
gate valve
extraction
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
Application number
DES90749D
Other languages
German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SAECHSISCHE MASCHF CHEMNITZ
Original Assignee
SAECHSISCHE MASCHF CHEMNITZ
Publication date
Priority to DES90749D priority Critical patent/DE491319C/en
Application granted granted Critical
Publication of DE491319C publication Critical patent/DE491319C/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
    • F01K7/34—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being of extraction or non-condensing type; Use of steam for feed-water heating
    • F01K7/36—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being of extraction or non-condensing type; Use of steam for feed-water heating the engines being of positive-displacement type

Description

Kolbenschieber zur Dampfentnahme bei Einzylinder-Dampfmaschinen Die Erfindung bezieht sich auf als Kolbenschieber ausgebildete Überströmschieber für Einzylinder-Dampfmaschinen, die zur Entnahme von Abdampf eingerichtet sind. Bei Verwendung der bisher gebräuchlichen Kolbenschieber ist für das Öffnen der Ausströ,nkanäle ein gewisser Überdruck im Zylinderraum notwendig, um die Reibung des Kolbenschiebers und den unter ihm lastenden Abdampfdruck zu überwinden sowie die auf den Schieber wirkende Feder zu spannen. Ist der hierdurch bedingte Druckunterschied zwischen der Abdampfleitung und dem Zylinderraum erheblich, dann verschlechtert sich der Dampfverbrauch der Maschine infolge des erhöhten Gegendruckes im Zylinder.Piston gate valve for steam extraction in single-cylinder steam engines Die The invention relates to an overflow valve designed as a piston valve for Single-cylinder steam engines that are set up to extract exhaust steam. at The piston valves that have been used up to now are used to open the outflow channels a certain overpressure in the cylinder chamber is necessary to reduce the friction of the piston valve and to overcome the pressure of the exhaust steam and the pressure on the valve acting spring to tension. Is the resulting pressure difference between the exhaust pipe and the cylinder space considerably, then the deteriorates Steam consumption of the machine due to the increased counter pressure in the cylinder.

Die Erfindung bezweckt, den Druckunterschied zwischen der Abdampfleitung und dem Zylinderraum zu verringern und dadurch den erwähnten Nachteil zu beseitigen. Zu diesem Zwecke wird der Kolbenschieber als Stufenschieber ausgebildet und eine dieser Stufen in einem Zylinder angeordnet, der mit einem Raum niedrigerer Spannung als der Entnahmespannung im Abdampfraum verbunden ist.The invention aims to reduce the pressure difference between the exhaust line and to reduce the cylinder space and thereby eliminate the disadvantage mentioned. For this purpose, the piston valve is designed as a stepped valve and a these stages are placed in a cylinder with a lower voltage space than the extraction voltage is connected in the exhaust steam space.

Die Zeichnung veranschaulicht ein Ausführungsbeispiel des Erfindungsgegenstandes, und zwar zeigt sie den im Abdampfraum untergebrachten Kolbenschieber im Längsschnitt.The drawing illustrates an embodiment of the subject matter of the invention, namely, it shows the piston valve housed in the exhaust steam chamber in a longitudinal section.

Es bezeichnet a die Durchtrittsöffnung des Zylinderraumes, b einen durch ein Gestänge c gesteuerten Kolbenschieber (Auslaßorgan) und d den als Stufenkolben ausgebildeten Kolbenschieber. Dieser dient als selbsttätiges Abschlußorgan und besitzt zwei Stufen c und f. Auf der Oberseite der Stufe e lastet der im Zylinderraum herrschende Druck, auf seiner Unterseite der Druck des Abdampfraumes g. Die zweite Stufe f läuft in einen Zylinder h, der durch eine Leiturig i mit einem Raum verbunden ist, in dem eine niedrigere Spannung als im Abdampfraum g herrscht. Auf diese Weise werden die zu überwindenden Widerstände verringert, so daß der Druck im Zylinderraum nur wenig höher als der Druck im Abdampfraum; g zu sein braucht, um das Öffnen der Ausströmkanäle h durch Verschieben des Kolbenschiebers d zu bewirken.It denotes a the passage opening of the cylinder space, b a piston valve (outlet element) controlled by a linkage c and d the piston valve designed as a stepped piston. This serves as an automatic closing element and has two stages c and f. The pressure prevailing in the cylinder chamber is on the upper side of the stage e and the pressure of the exhaust steam chamber g is applied on its lower side. The second stage f runs into a cylinder h, which is connected by a duct i with a space in which there is a lower voltage than in the exhaust steam space g. In this way, the resistances to be overcome are reduced, so that the pressure in the cylinder chamber is only slightly higher than the pressure in the exhaust steam chamber; g needs to be in order to cause the opening of the outflow channels h by moving the piston valve d.

Durch entsprechende Wahl des Durchrnessers der zweiten Stufe f läßt sich der Druckunterschied zwischen Zylinderraum und Abdampfraum g nahezu aufheben.By appropriate choice of the diameter of the second stage f can be the pressure difference between the cylinder chamber and the exhaust steam chamber g almost cancel each other out.

Claims (1)

PATENTANSPRUCH: Kolbenschieber zur Dampfentnahme bei Einzylinder-Dampfmaschinen, dadurch gekennzeichnet, daß der Kolbenschieber (d) als Stufenschieber ausgebildet ist, dessen zweite Stufe (f) in einem besonderen Zylinder (h,) läuft, der mit einem Raum niedrigerer Spannung als der Entnahmespannung in Verbindung steht.PATENT CLAIM: Piston gate valve for steam extraction in single-cylinder steam engines, characterized in that the piston valve (d) is designed as a stepped valve whose second stage (f) runs in a special cylinder (h,) which is connected to a Space of lower voltage than the extraction voltage.
DES90749D Piston gate valve for steam extraction in single-cylinder steam engines Expired DE491319C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DES90749D DE491319C (en) Piston gate valve for steam extraction in single-cylinder steam engines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES90749D DE491319C (en) Piston gate valve for steam extraction in single-cylinder steam engines

Publications (1)

Publication Number Publication Date
DE491319C true DE491319C (en) 1930-02-08

Family

ID=7516050

Family Applications (1)

Application Number Title Priority Date Filing Date
DES90749D Expired DE491319C (en) Piston gate valve for steam extraction in single-cylinder steam engines

Country Status (1)

Country Link
DE (1) DE491319C (en)

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