EP0035570B1 - Pompe alternative - Google Patents

Pompe alternative Download PDF

Info

Publication number
EP0035570B1
EP0035570B1 EP19800900420 EP80900420A EP0035570B1 EP 0035570 B1 EP0035570 B1 EP 0035570B1 EP 19800900420 EP19800900420 EP 19800900420 EP 80900420 A EP80900420 A EP 80900420A EP 0035570 B1 EP0035570 B1 EP 0035570B1
Authority
EP
European Patent Office
Prior art keywords
valve
suction
plunger
discharge
cylinder
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
EP19800900420
Other languages
German (de)
English (en)
Other versions
EP0035570A4 (fr
EP0035570A1 (fr
Inventor
Yoriaki Namekata
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.)
Arimitsu Industry Co Ltd
Original Assignee
Arimitsu Industry Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Arimitsu Industry Co Ltd filed Critical Arimitsu Industry Co Ltd
Publication of EP0035570A1 publication Critical patent/EP0035570A1/fr
Publication of EP0035570A4 publication Critical patent/EP0035570A4/fr
Application granted granted Critical
Publication of EP0035570B1 publication Critical patent/EP0035570B1/fr
Expired legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/10—Valves; Arrangement of valves
    • F04B53/109—Valves; Arrangement of valves inlet and outlet valve forming one unit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/10—Valves; Arrangement of valves
    • F04B53/102—Disc valves
    • F04B53/103—Flat-annular type disc valves

Definitions

  • This invention relates to a reciprocating pump, and more particularly to a reciprocating pump which is provided, at the foremost end of a cylinder supporting a plunger in a relation of being freely reciprocating, with a suction passage, a discharge passage, and a valve device comprising a suction valve and a discharge valve, so that the plunger reciprocates to actuate the suction valve and discharge valve, thereby discharging pressure fluid.
  • a well-known valve device used for the reciprocating pump has one valve seat provided with a suction bore and a discharge bore and supports a suction valve and a discharge valve.
  • the conventional valve device is provided at the center thereof with the suction bore and at the outer peripheral portion with the discharge bore and is mounted on the foremost end of a cylinder housing therein a plunger.
  • the suction valve is provided at the inside of valve seat facing within the cylinder chamber, and a discharge valve is provided at the outside of valve seat.
  • a first coiled valve spring biasing the suction valve to the valve seat is housed within the cylinder chamber and a second coiled valve spring biasing the discharge valve to the valve seat is supported to a cylinder head provided outside the cylinder.
  • the first valve spring is supported at its one end to a spring holder provided within the cylinder chamber.
  • the first valve spring is coiled in uniform diameters.
  • the spring seat has a smaller inner diameter than a coil diameter of the spring and is disposed within the cylinder chamber in which the plunger reciprocates.
  • the spring holder causes interference with the reciprocation of plunger, whereby termination of the forward movement of plunger conventionally is set before the spring holder.
  • the surplus volume is excessively large enough to accommodate the first valve spring and spring holder within the cylinder chamber.
  • a large amount of residual air in the cylinder chamber creates a problem of poor starting characteristics when restarting the pump's running.
  • An object of the invention is to provide a reciprocating pump capable of preventing surplus volume within the cylinder chamber from being enlarged even when a valve device bearing at one valve seat the suction and discharge valves is incorporated with the foremost end of the cylinder.
  • valve arrangements have previously been proposed in DE-A-2,534,001; US-A-3,260,217; US-A-3,807,910; and FR-A-1,486,776.
  • the valve arrangements are relatively complex both as regards construction and mode of assembly.
  • a reciprocating pump comprising a cylinder incorporating a freely reciprocable plunger therein; a valve device provided at one end of the cylinder, said valve device including a valve seat associated with a suction valve, a discharge valve, a suction bore and discharge bore; a first frustoconical coil valve spring and a second valve spring each biasing the suction valve and discharge valve respectively to the valve seat; a cylinder head including a suction passage and discharge passage, the plunger having a conical foremost end and being reciprocable to actuate the suction valve and discharge valve at the valve device characterised in that the valve seat is formed in a plate-like shape and is provided with a suction bore adjacent the central portion of the valve seat opposite to one end of the plunger and adjacent an outer peripheral portion of the valve seat with a discharge bore; said valve seat is provided adjacent its central portion with a cylindrical portion having an inner space in continuation with the suction bore, the cylindrical portion being inserted into a through bore formed between the suction passage and the discharge
  • Fig. 1 is a schematic longitudinal sectional side view of an embodiment of the invention
  • Fig. 2 is an enlarged sectional side view of the principal portion of the embodiment in Fig. 1
  • Fig. 3 is an enlarged sectional plan view of the principal portion of the same.
  • the pump mainly comprises a housing 1, a drive shaft 2 supported rotatably thereto through bearings 3, three cylindrical cam bodies 4 having eccentric bores 4a and mounted on the drive shaft 2 respectively, three cylinders 5 mounted on the housing 1, three plungers supported within cylinder chambers 5a of cylinders 5 in a relation of being freely reciprocating and connected with the cam bodies 4 through rods 6 respectively, a cylinder head 8 having a suction passage 8a and provided at the foremost ends of cylinders 5, and three valve devices 9 provided at the foremost ends of cylinders 5 respectively.
  • each plunger 7 Between the outer periphery of each plunger 7 and the inner periphery of each cylinder chamber 5a are provided a sealing member 51, a seal holder 52 for the sealing member 51, and a spring 53 to bias the sealing member 51 to the seal holder 52.
  • Each cylinder 5 is interposed between the housing 1 and the cylinder head 8, and the cylinder head 8 is fixed to the housing 1 through mounting bolts (not shown).
  • the valve devices 9 each comprise a valve seat 91 having at the center thereof a suction bore 91a a and at the outer peripheral portion a discharge bore 91 b, a suction valve 92 for opening and closing the suction bore 91a, a discharge valve 93 for opening and closing the discharge bore 91 b, and a first and a second valve spring 94, 95 for biasing the suction valve 92 and discharge valve 93 to the valve seat 91.
  • the valve seat 91 comprises a main body 91c of a round-plate-like shape and a cylindrical portion 91 d extending axially outwardly from the center of one side of the main body 91c, so that a through bore formed at the center of main body 91c and an inner space of the cylindrical portion 91d form the suction bore 91a.
  • the discharge bore 91 b is formed at the outer peripheral portion of main body 91c.
  • the outer peripheral edge of main body 91c is interposed between the foremost end of each cylinder 5 and the cylinder head 8 so that the main body 91c together with the cylinder 5 is fixed to the housing 1 through the cylinder head 8 fixed thereto.
  • the main body 91c and cylindrical portion 91d may be integral or separate. When separated, they are easy to produce.
  • the suction valve 92 is disposed at the outlet side of suction bore 91 a and within the cylinder chamber 5a.
  • the discharge valve 93 is disposed at the outlet side of discharge bore 91b and within the discharge passage 8b.
  • the first and second valve springs 94 and 95 bias the suction valve 92 and discharge valve 93 to the valve seat 91.
  • Between the suction passage 8a at the cylinder head 8 and the discharge passage 8b thereof are provided three through bores 8c into which the cylindrical portion 91 d at each valve seat 91 is inserted at one axiaf end, so that the suction bore 91a is allowed to communicate with the suction passage 8a.
  • a ring-like shaped spring holder 11 through which the plunger 7 is passable, the spring holder 11 supporting the first valve spring 94 which biases the suction valve 92, and the spring 53 which biases the sealing member 51.
  • the first valve spring 94 is coiled in a frustoconical shape and its base of larger coil diameter is positioned at the plunger side so that the foremost end of plunger 7 may be insertable into the valve spring 94, the first valve spring 94 and spring holder 11 being housed within the cylinder chamber 5a. Also, the forward movement of plunger 7 is terminated (a) in proximity to the suction valve 92.
  • the second valve spring 95 is supported on an inner surface of discharge passage 8b.
  • reference numeral 12 designates a housing cover
  • 7a designates a plunger guide
  • 7b designates a plunger pin
  • 96 designates a guide tube for the second valve spring 95.
  • the drive shaft 2 rotates to reciprocate the plunger 7, so that the discharge valve 93 closes and the suction valve 92 opens when the plunger 7 moves backward, whereby liquid stored in a tank or water in a pond or river is taken into the cylinder chamber 5a from the inlet of suction passage 8a by way of the suction passage 8a and suction bore 91 a. While, the suction valve 92 closes and the discharge valve 93 opens when the plunger 7 moves forward, whereby the liquid within the cylinder chamber 5a is subjected to pressure so as to be discharged into the discharge passage 8b through the discharge bore 91b.
  • the pump in working as foregoing, stops the rotation of drive shaft 2 upon a finish of, for example, water sprinkling on the crops or washing the hull or the like.
  • the suction passage 8a opens in the atmosphere at the same time as input to the drive shaft 2 is stopped. At this time, if the drive shaft 2 is rotating under inertia, the liquid within the cylinder chamber 5a is substituted for air, so that the liquid, in certain circumstances, may be discharged thoroughly.
  • the reciprocating pump of the invention can reduce to a minimum the surplus volume in the cylinder chamber 5a due to the fact that the valve spring 94 biasing the suction valve 92 and the spring holder 11 supporting the valve spring 94, can be housed within the cylinder chamber 5a, and that termination (a) of the forward movement of plunger 7 can approach the suction valve 92. Consequently, a suction amount of liquid, when the pump restarts to run, increases to exhaust the residual air relatively for a short time, thereby enabling pressure to rise quickly in initial running of the pump.
  • a single, double or four or more multi-plunger type reciprocating pump may have the same construction as the invention.
  • the reciprocating pump of the invention in spite of bearing the suction valve and discharge valve by one valve seat, is capable of housing within the cylinder chamber the valve spring biasing the suction valve and the spring holder supporting the valve spring, and of positioning the terminate of forward movement of the plunger in proximity to the suction valve, thereby making it possible to minimize the surplus volume within the cylinder chamber.
  • the residual air within the cylinder chamber can be exhausted in a short time, thereby quickly raising pressure in the initial running.
  • the reciprocating pump of the invention is suitable for a hydraulic pump used for machine tools, a pump for sprinkling over the crops liquid medicine or water in a pond or river, a washing pump for injecting high pressure water on a hull, or a fire pump loaded on a motor fire engine, especially for a pump, in a cessation of its running, opening the suction passage in the atmosphere.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details Of Reciprocating Pumps (AREA)

Abstract

Un orifice d'admission (91a) et un orifice de refoulement (91 b) sont formes au centre et sur la peripherie externe d'un siege de soupape (91) montes a l'extremite d'un cylindre (5) dans une pompe alternative. Une soupape d'admission (92) et une soupape de refoulement (93) sont prevues sur les surfaces interieure et exterieure du siege de soupape (91) sur le cote d'une chambre cylindrique (5a), pour etre actionnees vers le siege de soupape (91) par un premier et un second ressorts de soupape (94 et 95). En outre, un dispositif de retenue a ressort (11) est prevu a mi-chemin le long du cylindre (5) par l'intermediaire duquel un piston (7) est telescope pour permettre le passage du piston (7) de maniere a supporter le premier ressort de soupape (94) pour que la position du piston (7) pour terminer son mouvement alternatif soit au voisinage de la soupape (93) de maniere a reduire le volume et par consequent la quantite d'air residuel en vue d'ameliorer la montee au moment du redemarrage.

Claims (1)

  1. Pompe à mouvement alternatif qui comprend un cylindre (5) dans lequel est logé un piston plongeur (7) à mouvement alternatif libre; un dispositif à soupapes (9) agencé à une extrémité du cylindre (5); lequel dispositif à soupapes comprend un siège de soupape (91) associé à une soupape d'aspiration (92), une soupape de refoulement (93), une lumière d'aspiration (91 a) et une lumière de refoulement (91 b); un premier ressort de soupape hélicoïdal tronconique (94) et un second ressort de soupape (95) rappelant chacun la soupape d'aspiration (92) et la soupape de refoulement (93) respectivement sur le siège de soupape (91); une tête de cylindre (8) comprenant un passage d'aspiration (8a) et un passage de refoulement (8b), le piston plongeur (7) ayant une extrémité antérieure conique et pouvant se déplacer en va-et-vient pour actionner la soupape d'aspiration (92) et la soupape de refoulement (93) du dispositif à soupapes (9), caractérisée en ce que le siège de soupape (91) est façonné en forme de plateau et comporte une lumière d'aspiration (91 a) adjacente à la partie centrale du siège de soupape en face d'une extrémité du piston plongeur (7) et adjacente à une partie périphérique extérieure du siège de soupape une lumière de refoulement (91 b); le siège de soupape comporte, au voisinage de sa partie centrale, une partie cylindrique (91d) ménageant un espace intérieur continuant la lumière d'aspiration (91a), la partie cylindrique étant insérée dans une forure (8c) ménagée entre le passage d'aspiration (8a) et le passage de refoulement (8b) dans la tête de cylindre (8) pour faire communiquer la lumière d'aspiration (91 a) avec le passage d'aspiration (8a); le siège de soupape (91) est maintenu à hauteur de son bord périphérique extérieur entre l'extrémité du cylindre (5) et la tête de cylindre (8); la soupape d'aspiration (92) est disposée par rapport au siège de soupape (91 ) de façon qu'elle se trouve entre la surface d'extrémité du piston plongeur (7) et le siège de soupape; et un porte-ressort (11) à travers lequel le piston plongeur (7) peut passer est monté dans la chambre du cylindre sur le trajet de va-et-vient du piston plongeur (7), ce porte-ressort (11) supportant le premier ressort (94) qui presse la soupape d'aspiration (92) par la spire de plus grand diamètre de ce premier ressort, de sorte que conjointement avec l'extrémité antérieure conique du piston plongeur (7), la position de fin de mouvement vers l'avant du piston plongeur (7) dans le cylindre (5) soit à même de venir à proximité de la soupape d'aspiration (92).
EP19800900420 1979-09-18 1981-04-08 Pompe alternative Expired EP0035570B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP12970179U JPS5922303Y2 (ja) 1979-09-18 1979-09-18 往復動液体ポンプ
JP129701/79U 1979-09-18

Publications (3)

Publication Number Publication Date
EP0035570A1 EP0035570A1 (fr) 1981-09-16
EP0035570A4 EP0035570A4 (fr) 1982-01-11
EP0035570B1 true EP0035570B1 (fr) 1984-11-14

Family

ID=15016053

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19800900420 Expired EP0035570B1 (fr) 1979-09-18 1981-04-08 Pompe alternative

Country Status (4)

Country Link
EP (1) EP0035570B1 (fr)
JP (1) JPS5922303Y2 (fr)
DE (1) DE3069616D1 (fr)
WO (1) WO1981000890A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030235509A1 (en) * 2002-06-21 2003-12-25 Hypro Corporation High aspiration valve design for piston pumps or compressors

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE72385C (de) * W. T. BELL in Breslau, Kaiser Wilhelmstrafse Anordnung von Saug- und Druckventil in dem Boden eines Pumpenstiefels
FR669992A (fr) * 1928-02-22 1929-11-22 Perfectionnements apportés aux ensembles siège de soupape-soupape, notamment aux ensembles du genre en question pour pompes à piston
FR1134166A (fr) * 1954-11-29 1957-04-08 Perfectionnements apportés aux têtes de cylindres avec soupapes doubles logées l'une dans l'autre et placées en tête, plus particulièrement pour des pompes
JPS4115874Y1 (fr) * 1964-01-23 1966-07-25
US3260217A (en) * 1964-08-05 1966-07-12 Frank Wheatley Pump & Valve Ma Pump having radial discharge valve
DE1453626B2 (de) * 1964-11-03 1974-12-12 G.L. Rexroth Gmbh, 8770 Lohr Ventil mit einem plattenförmigen Ventilglied
DE1528432A1 (de) * 1965-07-07 1970-02-26 Paul Hammelmann Pumpenkopf
JPS5021683B1 (fr) * 1967-05-02 1975-07-24
US3807910A (en) * 1972-05-03 1974-04-30 W Paget Compressor
DE2534001A1 (de) * 1975-07-30 1977-02-17 Paul Hammelmann Hochdruckplungerpumpe mit einem beruehrungslos gleitbar gelagerten plunger
US4032263A (en) * 1975-09-25 1977-06-28 Lear Siegler, Inc. Pump with coaxial inlet and outlet valve arrangement

Also Published As

Publication number Publication date
EP0035570A4 (fr) 1982-01-11
WO1981000890A1 (fr) 1981-04-02
DE3069616D1 (en) 1984-12-20
EP0035570A1 (fr) 1981-09-16
JPS5922303Y2 (ja) 1984-07-03
JPS5647274U (fr) 1981-04-27

Similar Documents

Publication Publication Date Title
US6077056A (en) Reciprocating pump
KR100337101B1 (ko) 연료분사펌프
US5383770A (en) Radial piston pump with vent in hollow piston
US4889096A (en) Fuel injection pump for internal combustion engines
US2265232A (en) Pump structure
US4842496A (en) Fuel injection pump for internal combustion engines including onset of supply control means
EP0035570A1 (fr) Pompe alternative
JP3823819B2 (ja) 燃料噴射ポンプ
JPH034780Y2 (fr)
JPH01247770A (ja) スラリーポンプ
US5044893A (en) Fuel injection apparatus
JPS6047479B2 (ja) 多連式往復動ポンプ
US2770500A (en) Fuel injection device
US5135367A (en) Fuel injector
WO1996028659A1 (fr) Pompe a pistons
JPH05296153A (ja) ダイヤフラムポンプ
JP2952963B2 (ja) 可変吐出量高圧ポンプ
JP2554571Y2 (ja) ラジアルプランジャポンプ
JP3350101B2 (ja) ラジアルピストンポンプ
JPH1122648A (ja) 燃料ポンプ
JP2551717Y2 (ja) ラジアルプランジャポンプ
JPH08144891A (ja) 内燃機関用燃料噴射ポンプ
JPH0315822Y2 (fr)
JPH0410380Y2 (fr)
JPH0626465A (ja) ダイアフラムポンプ

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19810611

AK Designated contracting states

Designated state(s): DE GB NL

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): DE GB NL

REF Corresponds to:

Ref document number: 3069616

Country of ref document: DE

Date of ref document: 19841220

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19890131

Year of fee payment: 10

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19900801

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19910114

Year of fee payment: 12

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19920125

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19920228

Year of fee payment: 13

GBPC Gb: european patent ceased through non-payment of renewal fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19931001