US449457A - Starting valve for compound engines - Google Patents

Starting valve for compound engines Download PDF

Info

Publication number
US449457A
US449457A US449457DA US449457A US 449457 A US449457 A US 449457A US 449457D A US449457D A US 449457DA US 449457 A US449457 A US 449457A
Authority
US
United States
Prior art keywords
valve
piston
pressure
steam
passage
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
Application number
Publication date
Application granted granted Critical
Publication of US449457A publication Critical patent/US449457A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/02Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
    • F16K11/04Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only lift valves
    • F16K11/044Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only lift valves with movable valve members positioned between valve seats
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00Fluid handling
    • Y10T137/2496Self-proportioning or correlating systems
    • Y10T137/2559Self-controlled branched flow systems
    • Y10T137/2564Plural inflows
    • Y10T137/2567Alternate or successive inflows

Definitions

  • Vt hen it is desired to start a compound steam-engine, it may be that the piston of the high-pressure cylinder is near the extreme of its stroke when its crank is 011 a dead-center, or is in such a position that the high-pressuresteam supply is cut off, and it may also be that the reservoir for supplying the low-pressure cylinder with exhaust from the high-pressure cylinder does not contain steam at sufficient pressure to move the low-pressure piston.
  • compound engines are usually furnished with a cook or valve, by which steam from the boiler can be admitted into the res ervoir, so as to give pressure sufficient for starting the low-pressure piston.
  • valves are liable to be violently closed by the exhaust-steam from the high-pressure cylinder, and when the engine is lightly loaded they are often subject to a hammering action, by which they are broken, and the fragments may occasion great damage in the valve chests and cylinders.
  • Figure 1 is a section of starting-valve according to my invention in the condition which it has when the engine is working or when it is stopped.
  • Fig. 2 shows its condition when it has been moved to admit steam to the reservoir at the starting of the engine.
  • the valve-box is fixed so as to have a passage A in communication with the pipe supplying the high-pressure valve-chest, a passage Bin communication with the high-pressure exhaust, and a passage D leading to the low-pressure valve-chest, so that the interior of the valve-box forms part of the intermediate reservoir supplying the low-pressure cylinder with exhaust-steam from the h i gh-pressure cylinder.
  • the valve-rod K has a part L of smaller diameter projecting through the cover, or it might be through a packed stuffing-box in the cover, and under the cover there is a passage P into the valve-box.
  • a piston R On the rod is fixed a piston R, having a long boss 0, which is larger in diameter than the rod K, and has a small groove or several sm all grooves out along it so far as to extend, when the valve is closed, as shown in Fig. 1, into the cylindrical cavity in which the piston R is fitted to work, allowing free escape of water of condensation.
  • This cavity has a port E opening into the valve-box, a passage H opening to the outer air, and a small branch passage G into H, also a communicating port F, having its months about as far apart as the depth of the piston R, and a small branch passage 0 into F.
  • a valve M On the valve-rod K there may also be fixed, as shown, a valve M, fitted to seat on the mouth of the passage B.
  • the grooved boss C of the piston R be made of such area that the pressure of the steam in the valve-box-that is to say, the exhauststeam from the high-pressure cylinder-acting on it is sufficient to overcome the pressure of the atmosphere on the area of L and that of the highpressure steam on the annular area of K, then the valve N may be dispensed with.
  • the valve operates in the following manner: For the purpose of starting the engine the high pressure steam supply valve is opened, admitting steam to the passage A.
  • the pressure in the body of the valve-box and in the passages B and D being at this time low the pressure on the annular area of the rod K forces it into the position shown in Fig. 2, so that steam can pass "freely from A to P into the valve-box and by the passage D to the low-pressure cylinder.
  • the valve M may be of advantage, because by closing B it prevents steam from the valve-box passing to the high-pressu re cylinder.
  • the valve-rod first begins to move, the piston R does not operate as a check, because air or steam can pass freely from under the piston by the port E and the grooves of O, and air can enter above the piston by the passages H and G; but as the piston R descends, closing the port E and taking the grooves of C beyond the bottom of the cylindrical cavity, the only escape from below the piston being by the small passage 0, the piston is so much retarded in its descent that the opening to P and the closing of M are gradual.
  • the valve-rod is forced back to the position shown in Fig. 1,but with retardation due to the partial cushioning of the piston R as it ascends after covering the lower mouth of H, when the only escape is by the small passage G.

Description

(No Model.) 7
W. B. YEO. STARTING VALVE FOR COMPOUND ENGINES. N0. 449,457.
Patented Mar. 81, 1891.
UNITED STATES PATENT OFFICE.
\VILLIAM B. YEO, OF MANCHESTER, ENGLAND.
STARTING-VALVE FOR COMPOUND ENGINES.
SPECIFICATION forming part of Letters Patent No. 449,457, dated March 31, 1891.
Application filed October 28, 1890. Serial No. 369,601. (No model.) Patented in England December 31, 1889, No. 20,910.
To aZZ whom it may concern.-
Be it known that I, WILLIAM HEATER YEo, a citizen of England, residing at Herbert Street, Moss Lane East, Manchester, in the county of Lancaster, England, have invented a new and useful Starting-Valve for Oompound Engines, (for which I have obtained Letters Patentin Great Britain, dated December 31, 1889, No. 20,910,) of which the following is aspecification.
Vt hen it is desired to start a compound steam-engine, it may be that the piston of the high-pressure cylinder is near the extreme of its stroke when its crank is 011 a dead-center, or is in such a position that the high-pressuresteam supply is cut off, and it may also be that the reservoir for supplying the low-pressure cylinder with exhaust from the high-pressure cylinder does not contain steam at sufficient pressure to move the low-pressure piston. In order to provide for starting'uuder such circumstances, compound engines are usually furnished with a cook or valve, by which steam from the boiler can be admitted into the res ervoir, so as to give pressure sufficient for starting the low-pressure piston. The sudden inflow of high-pressure steam is apt to produce violent shocks, the valves are liable to be violently closed by the exhaust-steam from the high-pressure cylinder, and when the engine is lightly loaded they are often subject to a hammering action, by which they are broken, and the fragments may occasion great damage in the valve chests and cylinders.
My invention has for its object to avoid these evils by a construction of starting-valve such as I shall explain, referring to the accompanying drawings.
Figure 1 is a section of starting-valve according to my invention in the condition which it has when the engine is working or when it is stopped. Fig. 2 shows its condition when it has been moved to admit steam to the reservoir at the starting of the engine.
The valve-box is fixed so as to have a passage A in communication with the pipe supplying the high-pressure valve-chest, a passage Bin communication with the high-pressure exhaust, and a passage D leading to the low-pressure valve-chest, so that the interior of the valve-box forms part of the intermediate reservoir supplying the low-pressure cylinder with exhaust-steam from the h i gh-pressure cylinder. The valve-rod K has a part L of smaller diameter projecting through the cover, or it might be through a packed stuffing-box in the cover, and under the cover there is a passage P into the valve-box. On the rod is fixed a piston R, having a long boss 0, which is larger in diameter than the rod K, and has a small groove or several sm all grooves out along it so far as to extend, when the valve is closed, as shown in Fig. 1, into the cylindrical cavity in which the piston R is fitted to work, allowing free escape of water of condensation. This cavity has a port E opening into the valve-box, a passage H opening to the outer air, and a small branch passage G into H, also a communicating port F, having its months about as far apart as the depth of the piston R, and a small branch passage 0 into F. On the valve-rod K there may also be fixed, as shown, a valve M, fitted to seat on the mouth of the passage B. If, however, the grooved boss C of the piston R be made of such area that the pressure of the steam in the valve-box-that is to say, the exhauststeam from the high-pressure cylinder-acting on it is sufficient to overcome the pressure of the atmosphere on the area of L and that of the highpressure steam on the annular area of K, then the valve N may be dispensed with.
The valve operates in the following manner: For the purpose of starting the engine the high pressure steam supply valve is opened, admitting steam to the passage A. The pressure in the body of the valve-box and in the passages B and D being at this time low the pressure on the annular area of the rod K forces it into the position shown in Fig. 2, so that steam can pass "freely from A to P into the valve-box and by the passage D to the low-pressure cylinder. In this action the valve M may be of advantage, because by closing B it prevents steam from the valve-box passing to the high-pressu re cylinder. vVhen the valve-rod first begins to move, the piston R does not operate as a check, because air or steam can pass freely from under the piston by the port E and the grooves of O, and air can enter above the piston by the passages H and G; but as the piston R descends, closing the port E and taking the grooves of C beyond the bottom of the cylindrical cavity, the only escape from below the piston being by the small passage 0, the piston is so much retarded in its descent that the opening to P and the closing of M are gradual. Again, when after certain movement of the engine exhaust steam comes into the valve-box by the passage B,the valve-rod is forced back to the position shown in Fig. 1,but with retardation due to the partial cushioning of the piston R as it ascends after covering the lower mouth of H, when the only escape is by the small passage G.
Having thus described the nature of this invention and the best means I know of carrying the same into practical eftect,l claim In a starting-valve for compound engines, the combination of the shouldered valve-rod K L with the passages A P, the piston R, its grooved boss (I, and the ports and passages E F 0 11 G, arranged and operating substantially as and for the purposes set forth.
In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, this 13th day of 25 October, A. D. 1890.
W. B. 'YEO.
Vitnesses:
OHAs. EDWD. WALKER,
Brookfield, Ger-ton, llfcmcheszfer.
O. H. ScHoBELT,
Chorlton-cumHardy, fllanchester.
US449457D Starting valve for compound engines Expired - Lifetime US449457A (en)

Publications (1)

Publication Number Publication Date
US449457A true US449457A (en) 1891-03-31

Family

ID=2518341

Family Applications (1)

Application Number Title Priority Date Filing Date
US449457D Expired - Lifetime US449457A (en) Starting valve for compound engines

Country Status (1)

Country Link
US (1) US449457A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3495613A (en) * 1965-05-28 1970-02-17 Werner & Pfleiderer Apparatus for supplying descaling installations and the like with a flow of low or high pressure fluid
US20050106112A1 (en) * 2002-12-30 2005-05-19 Boyd Thomas J. Oral and personal care compositions and methods

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3495613A (en) * 1965-05-28 1970-02-17 Werner & Pfleiderer Apparatus for supplying descaling installations and the like with a flow of low or high pressure fluid
US20050106112A1 (en) * 2002-12-30 2005-05-19 Boyd Thomas J. Oral and personal care compositions and methods
US20080160056A1 (en) * 2002-12-30 2008-07-03 Boyd Thomas J Oral and Personal Care Compositions and Methods
US9498410B2 (en) 2002-12-30 2016-11-22 Colgate-Palmolive Company Oral and personal care compositions and methods
US9827172B2 (en) 2002-12-30 2017-11-28 Colgate-Palmolive Company Dentifrice containing functional film flakes
US9918909B2 (en) 2002-12-30 2018-03-20 Colgate-Palmolive Company Oral and personal care compositions and methods

Similar Documents

Publication Publication Date Title
US449457A (en) Starting valve for compound engines
US485787A (en) Valve for direct-acting engines
US203009A (en) Improvement in automatic cut-offs for plane-valve engines
US756903A (en) Fluid-pump.
US406615A (en) Hydraulic governor for steam-pumps
US267672A (en) Water-motor
US134212A (en) Improvement in steam pumping-engines
US380375A (en) willans
US743927A (en) Steam-engine.
US168102A (en) Improvement in steam-engines
US336211A (en) Leon b
US109951A (en) Improvement in direct-acting engines
US546900A (en) peache
US439449A (en) wallis
US1023214A (en) Motor for pumps and other purposes.
US286747A (en) Cut-off valve
US749101A (en) Vania
US52965A (en) Improvement in steam-engines
US492188A (en) Frank a
US473994A (en) Steam dash-pot
US462182A (en) Steam-engine
US764629A (en) Hydraulic motor.
US748758A (en) Pumping-engine
US180433A (en) Improvement in valves for steam-engines
US220320A (en) Improvement in steam-engines