Showing papers on "Gear pump published in 1972"

Gear pump or motor

Abstract: In a gear pump or motor, the tooth profile of the intermeshing gears is involutely formed at least on a torque transmitting side The tooth profile of the intermeshing gears on a non-torque transmitting side is made steeper than an imaginary tooth profile which is symmetrical with that on the torque transmitting side

Gear pumps and motors

Abstract: A gear pump or motor includes a housing having an 8-shaped chamber, a pair of meshed gears in the chamber and a pair of ports opening into the chamber on opposite sides of the zone of mesh of the gears. The teeth of the gears have on their non-working flanks relieved portions adjacent the tip and the root of the tooth which are arranged to leave an unrelieved land across the entire non-working flank.

Hydrostatic transmission and method of transmitting power therethrough

Abstract: A hydrostatic transmission having a variable displacement hydraulic pump in fluid communication with a pair of variable displacement hydraulic motors The output shafts of the hydraulic motors are drivingly connected respectively to two members of a simple planetary gear set, the third member of which gear set is drivingly connected to the transmission output One motor shaft and the planetary gear member connected thereto are operatively connected to a brake which is selectively operable to prevent rotation thereof The brake is engaged in a low speed range to provide a gear reduction between the other motor output shaft and the transmission output through the planetary gear set The brake is disengaged during a high speed range so that the one motor provides a rotating reaction for the planetary gear set and contributes a speed component to the planetary gear set

Gearing with vibration damping means

Abstract: Meshing gears are provided with elastomeric inserts secured in the roots of the gear teeth. The inserts are serially contacted and deflected by the tips of the gear teeth as the gears rotate to damp gear vibrations resulting from gearing impulses that occur at a base frequency proportional to the number of gear teeth and the gear speed.

Mounting and drive for a hydraulic pump on an engine

Abstract: A mounting and drive for a hydraulic pump on an engine having a crankshaft and a flywheel gear. Additional gear means are in driving relation with the flywheel gear and extend from the crankshaft to the pump for powering the pump directly from the engine. A mounting plate is secured to the engine, and a bearing support and a pump bearing are on the mounting plate. A pump gear is supported in the bearing, and the pump shaft connects with the pump gear and is removable therefrom for removal or replacement of the pump. Also, the flywheel and the gears extending to the pump are removable for altering the gear ratio.

Temperature control of stator/rotor fit in helical gear pumps

Abstract: Loss of capacity in a helical gear pump resulting from wear of parts is restored by raising the temperature of the stator, or by raising the temperature of the stator and also the temperature of the fluid being pumped. Regardless of the state of wear, the capacity of a helical gear pump operating against elevated discharge pressures is improved by raising the temperature or temperatures as above, whereby to produce a tighter fit between the elements. Various alternative means for raising the temperature or temperatures are disclosed.

Gear pump with lubricating means

Abstract: A high pressure rotary spur gear pump including a pair of gear members intermeshing at a location between an inlet and an outlet, a pair of shafts carrying the gear members and having opposite ends mounted in bearing sleeves, together with means for pumping lubricating fluid under pressure from an area at the zone of intermeshing teeth, where the spaces between teeth are decreasing in volume, outwardly along the bearing sleeves at opposite ends of one shaft and back along the bearing sleeves at opposite ends of the other shaft, to the pump inlet.

Converter vessel drive using hydraulic motors

Abstract: At least one trunnion shaft of a tiltable metallurgical vessel has a driven gear affixed thereto. A gear housing surrounds the driven gear and is journaled on the shaft. Several hydraulic motors are mounted on the gear housing. Pinions on the respective motor shafts engage directly with the driven gear. Rotation of the gear housing, due to reaction between the pinions and gear, is resisted with a torsion bar.

Multicylinder motor or engine with double-acting pistons

Abstract: An internal-combustion engine or fluid (pneumatic or hydraulic) motor has a fixed central shaft formed with a sun gear, and a housing rotatable around the shaft. This housing is formed with a plurality of bores each subdivided into two compression chambers by a double-acting piston which is displaceable along an axis parallel or transverse to the shaft axis. Each piston is connected by a crank to a pinion which acts as a planet gear meshing with the sun gear so that reciprocation of the piston causes the planet gear to rotate, thereby entraining the housing about the fixed shaft. Alternatively the device may be driven mechanically to operate it as a pump.

Split torque drivetrain for multiple wheel vehicle

Abstract: A split torque gearing arrangement for use in a multiple wheel vehicle comprising four bevel torque delivery gears, one of which serves as a torque input gear, each of the other bevel gears serving as output gears, said gears including an internal clutch structure for selectively establishing a driving connection between the input gear and one of the output gears while the other two output gears are inactive and for clutching the input shaft to each of the output gears for split torque delivery, spaced bearing means for journalling the output gears and for accommodating gear tooth reaction torque and means for adjusting the bearing means to establish proper clearances between meshing gear teeth and for maintaining a desired preload on the bearing elements.

Reversible gear pump

Abstract: A sleeve-encased cartridge-type, unidirectional-flow, gear pump for compressors and the like having circumferentially aligned inlet openings in a stationary sleeve wall adjacent a covered end portion of the cavity thereof, and within said end portion an indexible flow connector block rotatably supported for turning to opposite limits of movement on a fixed concentric support. The block is resiliently urged against the end faces of an internal spur gear pump housed in the opposite end portion of the sleeve cavity, the inner gear of said pump being mounted on a pinion having a stationary axis offset from the sleeve axis and projecting from the end of said concentric block support, and the outer ring gear being rotatably supported by the sleeve wall. A drive connector plate engageable on the end of a compressor input shaft has a driving engagement to rotate the outer ring gear. The connector also has sealed passage means for joining an axial lubrication bore of an input shaft with a pump outlet bore in the offset pinion and the block support. One of a pair of radially directed passages in the support is connected to said outlet bore and the pump outlet side by an angled outlet passage of the indexible block at opposite limits of movement. An angled inlet passage in the block correspondingly connects the low pressure inlet side of the pump with an opening of the stationary sleeve wall.

Rotary fluid pump or motor

Abstract: A gear pump is disclosed in which pressure plates engage and provide a dynamic seal with the ends of the gear elements. The side of each pressure plate remote from the gear is divided into two separate pressure balancing zones, one of which is maintained substantially at inlet pressure and the other at outlet pressure. A simplified seal assembly functions to seal the main housing and end caps and also to separate the two pressure zones. The main seal is ring-shaped and is formed with integral inwardly extending projections. The structure is arranged so that this seal can only be installed in the proper position. A second Ishaped seal separates the two pressure zones at a location between the bearings. Here again, such seal can be installed only in a single proper installed position. Both seals are pressure actuated to insure proper and complete sealing.

Gear wheel pump with feed passage of constant hydraulic cross section

Abstract: Gear wheel pumps, in particular melt pumps for vessels at subatmospheric pressure, whose pump casing consists of three plates stacked tightly against one another, the middle plate having two contiguous, partially overlapping housing intermeshing gear wheels, one gear wheel being driven. The middle plate contains a feed passage of constant hydraulic cross section and a discharge passage for the liquid to be pumped via pipes or tubes connected therewith.

Energy absorbing rotary piston pump

Abstract: An energy absorbing device, which is highly effective for use in an aircraft arresting gear, is provided by mounting a rotary pump having a pressure related characteristic within a container of fluid. The pump circulates the fluid from and back into the container whereby it absorbs energy in response to a mechanical input and transmits this energy to the fluid in the container in the form of heat. A highly effective form of this device utilizes a rotary piston-type pump having an axial input channel in its shaft connected to radial passageways extending through its cam disc and rotating piston. The fluid is discharged through pressure relief valves of the compressed air cushioned type. The rotary piston-type pump is particularly advantageous for such service because its rotor rotates slower than the input shaft, thus minimizing the mass of the pump to provide a given amount of energy absorption.

Gear pump and motor having a sealed lock for preventing hydraulic oil from leaking between the ends of the teeth of the gears

Abstract: A gear pump and motor having a housing, a pair of gears engaged with each other, and a seal block disposed between the inner surface of the housing at high pressure side and the teeth ends of the gears, which has the seal block having a passage formed therethrough for hydraulic oil, a plurality of pressure chambers formed between the inner surface of the housing and the seal block, and a plurality of holes or passage are formed in the seal block for communicating the pressure chamber with the gear side. Thus, it prevents hydraulic oil from leaking to provide a high efficient gear pump and motor.

Rotary gear device to provide pulsating flow

Abstract: This invention utilizes the rotary motion of a pair of gears to provide pulsating or reciprocating motion to a fluid. The device comprises a gear block containing a gear cavity, a power gear rotatably mounted in the gear cavity and operably connected to a power unit, a mutilated idler gear disposed in the cavity in meshing contact with the power gear, a fluid reservoir fluidly connected to the cavity, and a discharge conduit fluidly connected to the cavity, wherein during a complete revolution of the mutilated gear the fluid is pumped from the reservoir to the discharge conduit in a pulsating flow.

Gear pump with seal plates

Abstract: A high pressure rotary gear pump including a housing having a pair of external gear members intermeshing at a location between an inlet and an outlet, a pair of shafts carrying the gear members and having opposite ends mounted in bearings in the housing, a pair of thin generally 8-shaped floating seal plates around the shafts at opposite sides of the gears, means providing a definite primary area on the gear side of each plate subjected to outlet pressure applying a primary force tending to separate the plate from the gears, means defining a pressure balance area subjected to outlet pressure to overcome the primary force, a recess in the periphery of each plate at each end thereof supplying outlet pressure to the primary pressure balance area, means defining secondary areas between the inlet and the primary areas on the gear side of each plate subjected to pressure gradients varying with speed and applying secondary forces tending to separate the plate from the gears, means defining a pressure balance area on the remote side of each plate opposed to each secondary area, an aperture in each plate intermediate the ends of each secondary area communicating the secondary area with the opposed pressure balance area to overcome the secondary force, and a land on the periphery of each plate between the inlet and each peripheral recess beveled to deform in use on contact with the housing when subjected to high pressure, thereby to provide an effective seal between the inlet and each recess.

Hydrostatic mechanical transmission

Abstract: A hydrostatic-mechanical transmission arrangement comprising a casing rotatably mounting a gear carrier and sun gears journaled on either side of same for rotation about the axis of rotation of the carrier, with the carrier carrying a gear pump of which one of the meshing gears thereof is coupled to one of the sun gears, and the other pump gear is coupled to the other sun gear, and with the carrier equipped with a hydraulic motor of the axial piston type including an annular reaction plate against which the motor pistons react that is non-rotating in nature, but adjustable about a pivot axis normal to the axis of rotation of the carrier. A hydraulic conduit arrangement including a flow orienting valve plate fixed to the casing but in liquid tight relation with the carrier confines hydraulic liquid flow to between the pump and motor. Either of the sun gears may serve as the input, but by reversing the functions of the motor and pump, the carrier may be driven to serve as the input.

Gear type pumps

Abstract: 1,269,056. Gear pumps. H. E. MERRITT. June 30, 1969 [July 3, 1968J, No.31811/68. Heading F1F. In a gear pump having a pair of externallymeshing gear-wheels 3, 4 tooth wear is minimized by rendering the tooth profiles such that the path of contact 11 for the mating teeth has substantially the shape of a letter S, the part of the path that is concave relative to the centre O of the wheel 3 being shorter than the part that is concave relative to the centre Q of the wheel 4. The profiles of the teeth 9, 10 are conjugate and the diameter of the tip circles may be dissimilar or equal while the diameters of the pitch circles are equal or dissimilar accordingly. The profile of each flank of the teeth 9 may be an arc of a circle having a radius R and centre at a point S1, which when advanced by gear rotation to a point S2 is situated such that a line extending therefrom through the pitch point P cuts the path of contact at C. Two geometric constructions of said path are described with reference to Figs.4 and 5 (not shown), from which the profile co-ordinates can be determined. The path may be based on a logarithmic spiral or Nicomedean conchoid.

Magnetic torque convertor for propulsion systems

Abstract: A magnetic torque convertor includes two planetary gear sets respectively coupled to two coercive force brakes which control their driving speed. An input drive shaft is coupled to one planetary gear set which includes a planetary gear carrier coupled to a ring gear of the other planetary gear set. An output drive shaft is coupled to a planetary gear carrier of the other planetary gear set. The planetary gear sets have different gear ratios for driving the output shaft at different speeds under control of the brakes which are energized by direct current of variable magnitude.

Infinite gear ratio automatic drive transmission

Abstract: The subject invention includes the usual planetary gear section, torque converter section, and a master fluid pump. However, the usual low and/or high drive clutch section is non-existent or is superseded by a drum section which includes, internally thereof, a plurality of gear pumps and a bell gear. The drum section is rotatably mounted about the usual transmission input shaft. A metering valve is included for varying the amount of fluid allowed to flow from the master fluid pump to the gear pumps. Opening the meter valve is effective to inundate the gear pumps with fluid which impedes rotation or locks the gear pumps, thus causing the drum section to be carried or rotatably driven by the bell gear, i.e., the transmission output shaft now rotates in unison with the transmission input shaft or an essential 1:1 gear ratio is achieved. Virtually closing the metering valve starves the gear pumps of fluid which is effective to allow the drum section to respond to the rotation of the planetary gear section, i.e., the drum section revolves at the same speed as the transmission input shaft but in an opposite direction of rotation or a neutral condition is achieved. Opening the metering valve slightly to a cracked position commences to load the gear pumps which is effective to cause the drum section to rotate at a lower speed than the input shaft, i.e., in opposite directions but establishing a maximum gear ratio between the transmission input and output shafts. Further impediment, of varying degrees, upon the gear pumps is achieved by varying the setting of the metering valve between the cracked and the fully opened positions. This is effective to provide infinite ratios between the revolutions of the transmission input and output shafts.

Gear pump or motor with unitary flexible end seal plate

Abstract: A gear pump has a seal for the end faces of the gears formed of a flexible plate clamped between body parts at its periphery. The inner part of the plate is physically separated from the periphery by a through-slot along the pressure arc of the gears and by an opening along the intake arc; being joined to the periphery only along a short arc of less than 90.degree. adjacent the intake arc by a cantilever beam portion of the plate. This allows freedom for the sealing portion to maintain flatter contact with the gear end faces, particularly at the arc of tooth intermesh.

Rim power hydraulic motor

Abstract: A rim power hydraulic motor in which a rim is provided with internal spur teeth meshing with spur gears mounted for rotation in a fixed axial member. The spur gears are driven by hydraulic pressure with the meshing gears of the rim serving as a barrier to the passage of hydraulic fluid thereby. The rim may directly support a multiple V-belt pulley, an automobile tire and wheel or any other object to be rotated by power.

Internally-meshing gear pumps and motors

Abstract: 1,269,643. Internally-meshing gear pumps and motors. JOSEPH LUCAS (INDUSTRIES) Ltd. July 7, 1969 [July 19, 1968], No.34497/68. Heading F1F. An internally-meshing gear pump (or motor) comprising an internally-toothed ring gear 17, Fig. 1, mountedfor rotation in a housing 10, a meshing pinion 16 mounted for rotation on an axis parallel to and spaced from the ring gear axis and a crescent-shaped member 27 therebetween having inner and outer arcuate faces engaging the pinion and ring gear teeth respectively, includes fixed and movable side-plates 19, 20, Fig. 2, pressing against opposite axial end-faces of the pinion and ring gear with the crescent-shaped member fixed with respect to the fixed side-plate 19 and slidable with respect to the movable side-plate 20 and a resilient sealing element 34 extending in a peripheral groove around at least part of the crescent-shaped member to sealingly engage a complementary crescent-shaped hole in the plate 20. When extending only part way round the member 27 the sealing element 34 is located at that end of the member 27 adjacent the high-pressure port 29. The high-pressure port and low-pressure port 28 are bifurcated and communicate respectively with apertures 31, 30 in the side-plates 19, 20 on opposite sides of the zone where the pinion 16 and ring gear 17 are inter-engaged. Grooves 32, 33 extending from the aperture 30 on opposite sides of the member 27 prevent cavitation by continuously allowing liquid to enter the spaces between the inter-engaging teeth at the radially inner extreme of the spaces. The plate 20 is secured to a bell member 21 which is acted upon by pistons 23, 24, 25 subjected to the pressure obtaining at the high-pressure part to urge the plate 20 into sealing engagement with the axial end-faces of the pinion and ring gear and the pinion and ring gear in turn in sealing engagement with the plate 19.

Gear pump with balanced side sealing bushes

Abstract: A gear pump for fluids, comprising gears which are laterally sealed by a counter pressure as a function of the delivery pressure. Sealing gaskets pertaining to the counter pressure have cylindrical seats. Counter pressure limiting rings independent of the wall and of the gear sealing bush, yet firmly held against the wall by a mechanical surface seal as a function of the difference in the diameters of the rings, thereby guaranteeing constant adhesion on the part of the contact surfaces between the rings and the wall while the pump is in operation. The rings are placed asymmetrically with respect to the surface of the sealing wall, so as to displace the center of gravity of the counter pressure towards the delivery side and make it coincide with the center of gravity of the internal pressure on the sealing wall.

Improvements in or relating to gear pumps

Abstract: 1,270,122. Gear pumps and motors. PLESSEY CO. Ltd. March 4, 1970 [March 6, 1969], No.11998/69. Heading F1F. [Also in Division C7] A gear pump (or motor) wherein at least the teeth of the gears are made from a material consisting of a dispersion of hard metal carbides, silicides, borides or nitrides in a heat-treatable ferrous matrix. A suitable material is that known as Ferro-TiC-grade C. This material may be machined prior to heat-treatment to its ultimate shape with the addition of a very small finishing allowance which may be removed by grinding.

Positive displacement machine with a continuously variable adjustment for a hydrostatic gear

Abstract: Stepless variable hydrostatic gear comprising a positive displacement pump and motor, at least one of which has means for the adjustment of the displacement volume, causing an alteration in the gear ratio; said means being constituted by wall parts which are movable under hydraulic pressure.