US3552268A - V-type fluid driven motor - Google Patents

V-type fluid driven motor Download PDF

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Publication number
US3552268A
US3552268A US764513A US3552268DA US3552268A US 3552268 A US3552268 A US 3552268A US 764513 A US764513 A US 764513A US 3552268D A US3552268D A US 3552268DA US 3552268 A US3552268 A US 3552268A
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United States
Prior art keywords
valve
cylinders
pair
pressure
fluid
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Expired - Lifetime
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US764513A
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English (en)
Inventor
Frank V Mccay Jr
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Envirotech Corp
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Envirotech Corp
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L17/00—Slide valve-gear or valve arrangements with cylindrical, sleeve, or part annularly-shaped valves surrounding working cylinder or piston
    • F01L17/02—Drive or adjustment during operation, peculiar thereto, e.g. for reciprocating and oscillating movements or for several valves one inside the other

Definitions

  • the invention relates to air motors of the type employing a rotary valve for air introduction and in particular to motors in i which the cylinders are arranged in V-shape
  • the rotary valve has dual purpose porting that isused alternately to supply pressured air to the cylinders during the work cycle and to discharge air therefrom during the exhaust cycle.
  • This has the disadvantage that pressured air is alternately introduced and discharged through the same ports in the valve. This is wasteful of pressuredair and contributes to inefficiency.
  • the primary object of this invention is to provide an air motor with a rotary valve in which the pressures on the valve are constant and the pressure Zones in the valve are balanced thereby to distribute forces and thus minimize wear.
  • Another object is to provide. such a motor in which the valve is arranged so that the cooling effect of the exhausting gas absorbs heat from the motor while at the same time the residual motor heat is used to prevent excessive buildup of ice.
  • a further object is to provide a structure enabling the valve to be mounted for rotation by journaling its ends in antifriction bearings yet protecting the bearings from contamination by dust particles and moisture carried by incoming pressured fluid.
  • a motor structure having a rotary valve with separate passages for the supply of pressured air and the discharge of exhaust gas therefrom; and in which the rotaryvalve is journaled in antifriction bearings for rotation'within a valve housing.
  • Exhaust passages for permitting rapid release-of fluid pressure at completion of the work cycle are located adjacent the valve ends so that only low pressure exists adjacent the bearings and the resulting low-pressure drop keeps contaminants such as moisture and solids carried by the high pressure gas from passing through the bearings. This is especially important when the housing and bearings are located in the crankcase because it protects .thecrankcase oil from such moisture. and solid particles.
  • the valve housing is located between the cylinder banks and in heat exchange relationship with the interior of the crankcase so that heat generated by the motor due to friction and stirring of the oil is absorbed by the expanding exhaust air.
  • the engine is kept warmth but does not overheat.
  • warm crankcase oil splashes on the valve housing thus warming it and preventing ice buildup in the valve. Instead. as ice is formed it is immediately swept out with the exhaust air. This keeps the exhaust passages clear thus facilitating gas exhaust and maintaining high engine efficiency.
  • the distribution systemfor high-pressure air is arranged symmetrically about the axis of rotation, so that pressure zones are substantially opposite each other. That is, "l 80" apart on opposite sides of thevalve axis and only slightly displaced'axially.
  • pressured'air is continucontinuous pressure and the opposed pressure zones offset each other and keep the rotating valve balanced so there is no single direction side thrust against the bearings.
  • FIG. 1 is a top elevational view of a'V-type air motor embodying the invention.
  • FIG. 2 is a sectional view taken in the plane of line 2-2 of FIG. 1 looking in the direction of the arrows, certain parts being shown in elevation for purposes of clarity.
  • FIG. 4 is ,a side elevational view of the rotary valve of this in- FIGQS is an end view, looking toward the left end of the FIG. 4.
  • FIGS. 6 and 7 are views of the valve of FIGS. 4 and 5 but with the valve rotated 90 counterclockwise.
  • FIGS. 8 and 9 are views of the valve of FIGS. 4 and 5 but with the valve rotated 180 counterclockwise.
  • FIGS. 10 and 11 are views of the valve of FIGS. 4 and 5 but with the valve rotated 270 counterclockwise.
  • FIG. 12 is a sectional view taken in the plane of line 12-12 of FIG. 8 looking in the direction of the arrows.
  • FIG. 13 is a sectional view taken in the plane of line 13-13 of FIG. 8, looking in the direction of the arrow.
  • the air motor is ofV construction comprising a housing containing a plurality of cylinders 10, 11, 12 and 13 arranged in pairs with the cylinders of each pair being angularly displaced from each other on opposite sides of the crankshaft .14 and with the front pair of cylinders 10 and 13 displaced from the rear cylinders 11 and 12 axially along the crankshaft, all of which is usual. All pistons are reciprocatably mounted in their respective cylinders and are connected to the single crankshaft.
  • a passage 18 leading from the'top of each cylinder connects to another passage 19 formed in a removable valve assembly 21 which passage inturn connects with a valve housing 22 forming a 'partof the valve assembly.
  • the valve housing is sized to rotate' the valve at the same speed and in the same direction as the crankshaft.
  • Ports 29 and 31 are provided for supply of pressured air or other fluid and the discharge of residual low-pressure air as hereinafter described.
  • ports 29 and 31 are furnished in pairs with one top opening and one side opening port as shown in FIGS. 1 and 3. In operation, one port of each pair will be plugged.
  • One of the ports 29 or 31 supplies pressured air for forward motion of the motor and the other for reverse.
  • valve assembly 21 comprises a main portion 21', which includes the valve housing 22, and a cap 21" suitably secured thereto.
  • FIGS. 4-13 illustrate details of the rotary valve employed inthe reversible motor shown in FIGS. 1-3.
  • thepressure air inlet slots 33 and 34 communicate respectively with ports 29 and 31.
  • the inlet passages 29 and 31 communicate with annular grooves 29 and 31 formed in the interior wall of the valve housing.
  • the corresponding groove 29" or 31' in the'housing and the mating inlet 33 or 34 in the valve will continuously receive pressured air as -will all other sections of the valve communicating with inlet grooves 33 or 34. lllustratively,.pressured air introduced through port 29 and groove 29' will enter passage 33 of the valve thence.
  • the two zones are also spaced'axially on the valve so that one zone may serve the cylinders connected to the front crank and the other zone may serve the cylinders connectedto the rear crank'of the (crankshaft.
  • zones 39 and 41 which are located symmetrically about the valye axis similarly to previouslydescribed zones 37 and,38.
  • Primary exhaust grooves 30 are formed in the valve adjacent its ends. These communicate with annular grooves 30' in the valve housing and also connect to the exhaust gas receiving chambers Q3 located adjacent the valve ends.
  • Pressure zone 38 rotates into register with the passage leading to the right rear cylinder 11 to supply pressured air thereto while exhaust of the left rear cylinder 12 occurs as previously described in connection with the right front cylinder 10. To complete the entire cycle the left front cylinder 13 is pressured when pressure chamber 37 rotates into register with the passage19 serving that cylinder.
  • any suitable air valve may be used to selectively and controllably supply air to the ports 29 and 31.
  • the rotary valve 23 is always in balance due to the symmetrical arrangement of pressure I ,gzones. Thus, on rotation, it moves easily in its bearings and does not put uneven ,or concentrated side thrusts .on them.
  • a pressure fluid-driven'rnotor comprising a crankcase; a plurality of cylinders each having a piston reciprocatably mounted therein; a "sih'gle-crankshaftin the crankcase and means correcting alldf 'said pistons thereto; a supplyinletfor supplying pressured fluid to said motor and an outlet for ex.- hausting fluid therefrom;'exhaiist passage-means for-discharge of fluid from said cylinders to exit from saidoutleti and fluid distribution meansfor conducting pressured fluid sequentially to said cylinders, said distribution means comprising a valve housing positionedwithin said crankcase and in heat exchange relationship therewith, a rotary valve rotatahly mounted in said housing, means connecting said valve to said crankshaft nabling rotation of said valve by said crankshaft,firstpassage means providing communication between saidvalvefhousing and said inlet, a pair of pressure-balancedpressure chambers in saidvalve opening outwardly of .the surface'thereof
  • a motor according to preceding claim 1 in which said cylinders are arranged in angularly displaced banks' in the form of a V, means mounting said valve housing between said banks, antifrictionbearingsmounted in opposite ends of said valve housing inside of said'crankcase, said valve being journaled for rotation in said bearings.
  • a motor according to preceding claim 2 including at least two pairs of cylinders and pistons, the cylinders of each pair being angularly displaced from each other in the form of a V and on opposite sides of the crankshaft, eachpair being dis placed'from the other pair axially 'of the crankshaft, and;said outwardly opening pressure chambers in said valve being displaced from each other axially of said valve :to enable ion'enof. said openings to communicate sequentially with said final passages leading to the cylinders of one said pair of cylinders and the other opening to communicated sequentially with said final passage leading to the cylinders of said other pair, s
  • said exhaustmeans includes a pair of exhaust chambers in said rotary valve opening outwardly of the valve surface, each of said exhaust chambers being angularly displaced from-.one of.said pressure chambers and ;lo c"ated in the same-plane transversely of the valve axis as said onepressure chamber, a pair of annular exhaust grooves in said valve located one adjacent each -.end thereof inboard ofsaid antifriction bearings, separate passage means in said valve interconnecting each of said exhaust chambers s vith itscorresponding annular exhaust groove, and
  • passage means interconnecting said annular exhaust grooves with said outlet for discharging fluid from said motor.
  • a pressured fluid-driven motor comprising a crankcase; a plurality of cylinders each having a piston reciprocatably mounted therein; a single crankshaft in the crankcase and means connecting all of said pistons thereto; a first and second inlet through which pressured fluid can 'be either supplied to or exhausted from said motor depending on motor direction;
  • a motor according to claim 5, wherein one of said second pair of pressure chambers being in the same transverse plane with one of said first pressure. pair of pressure chambers and the other of said second pair of pressure chambers being in the same transverse plane with the other pressure chamber of said first pair of pressure chambers.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Hydraulic Motors (AREA)
US764513A 1968-10-02 1968-10-02 V-type fluid driven motor Expired - Lifetime US3552268A (en)

Applications Claiming Priority (1)

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US76451368A 1968-10-02 1968-10-02

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US3552268A true US3552268A (en) 1971-01-05

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US764513A Expired - Lifetime US3552268A (en) 1968-10-02 1968-10-02 V-type fluid driven motor

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US (1) US3552268A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE1949629A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
ES (1) ES371937A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR2019675A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1289997A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108412551A (zh) * 2017-11-04 2018-08-17 封海涛 分配灌气式蒸汽发动机

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2288856A (en) * 1994-03-25 1995-11-01 Mervyn A Hutchings Air engines

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US265473A (en) * 1882-10-03 Engine
US866922A (en) * 1907-04-08 1907-09-24 Chicago Pneumatic Tool Co Engine.

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US265473A (en) * 1882-10-03 Engine
US866922A (en) * 1907-04-08 1907-09-24 Chicago Pneumatic Tool Co Engine.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108412551A (zh) * 2017-11-04 2018-08-17 封海涛 分配灌气式蒸汽发动机

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Publication number Publication date
DE1949629A1 (de) 1970-04-09
ES371937A1 (es) 1971-11-16
FR2019675A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1970-07-03
GB1289997A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1972-09-20

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