Showing papers on "Thrust bearing published in 1980"

Fail safe dynamoelectric machine bearing

Abstract: A bearing fail-safe type dynamoelectric machine is provided with first and second bearings at one end of the machine. The machine is shown as a vertical shaft machine with both bearings capable of carrying the longitudinal thrust due principally to the weight of the rotor and shaft. The first bearing is mounted in a seat in the frame and rotatably journals the shaft under normal running conditions. The second bearing is adjacent to the first and positioned above it, and is in an idling condition or nonload-bearing condition by being radially and longitudinally spaced from the seat in the frame. If the first bearing should fail, then the shaft will drop slightly, due to gravity and applied external forces, and the second bearing will become enabled, rotatably journaling the shaft. This will establish a fail-safe bearing construction in the dynamoelectric machine. The foregoing abstract is merely a resume of one general application, is not a complete discussion of all principles of operation or applications, and is not to be construed as a limitation on the scope of the claimed subject matter.

Torque-proportioning differential with wedge block thrust bearing means

Abstract: A differential apparatus is disclosed of the type including pairs of helical differential pinions for transmitting torque from a rotatably driven differential carrier housing to a pair of side gears splined to a pair output shafts, respectively, characterized by the provision of a collapsible and expansible wedge block spacer assembly for maintaining the output shafts in spaced relation and for reacting to axially inwardly directed thrust forces. During assembly of the differential apparatus, the spacer block is introduced, when in a collapsed condition, into the housing via a transverse access opening, to a position between the output shafts, whereupon the wedge block assembly is axially expanded into supporting engagement with the adjacent ends of the output shafts. The housing includes three sections, a pair of end cover sections being arranged on opposite sides of a center section of contoured configuration.

Swivel joint construction for pressure containing conduit

Abstract: A swivel joint for pressure containing conduits such as movable flow lines may comprise a pair of hub elements each having means establishing interconnection with a section of flow line, the hub elements being abutted in such a manner as to define a flow passage through the swivel joint construction. A thrust flange is formed on each of the hub elements, the flanges being retained within a split housing structure that serves to retain the swivel joint in assembly. Rotatable relationship between the hub elements and the body structure is established by a thrust bearing that is interposed between an internal shoulder of the housing and a segmented bearing retainer that also forms a part of one of the thrust flanges. A low friction spacer element may be disposed between the thrust flanges of the hubs to prevent the development of friction retardation of swivel movement. The hubs interfit to define a sealed recess within which is received a seal sleeve that is of sufficient length to transition the joint between the abutted hubs. The split bearing retainer enables the thrust bearing to be easily removed and replaced by means of field repair.

Floating ring bearing structure and turbocharger employing same

Abstract: A bearing structure including a bearing housing, a thrust sleeve retained within the bearing housing, a pair of bearing sleeves received within the bearing housing on opposite sides of the thrust sleeve, and a shaft received within the thrust sleeve and bearing sleeves. The thrust sleeve is retained in a manner to permit movement of the thrust bearing relative the bearing housing to correspond with movement of the bearing sleeves to maintain parallelism between the associated end bearing surfaces on the thrust sleeve and bearing sleeves. A bearing structure for receiving radial and axial thrust loads and a turbocharger employing the described bearing structures are also disclosed.

Sealed bearing means for in hole motors

Abstract: An in hole fluid motor for driving a drill bit utilizing the circulation of drilling fluid to drive the motor, having a sealed bearing assembly. The bearing assembly has a hollow, rotary drive shaft disposed within a tubular relatively stationary housing with radial bearings and thrust bearings disposed between the drive shaft and housing. Sealing structures are provided between the drive shaft and housing in axially spaced relation with the bearings disposed in a chamber between the sealing structures and lubricated by a lubricant confined by the sealing structures and pressurized through a diaphragm by the pressure of fluid externally of the housing in the drill hole. One of the sealing structures has a pair of clean fluid reservoirs separating the bearing lubricant from the drilling fluid in the housing by a pair of sealing devices, one between the bearing lubricant and a first of the clean fluid reservoirs and the other between the first and the second clean fluid reservoirs. In the two forms shown, drilling fluid in the housing pressurizes the second reservoir. In one of these forms, drilling fluid in the housing also pressurizes the first reservoir, and in the other form, lubricant in the bearing chamber pressurizes the first reservoir. The pressure difference between motor fluid upstream of the bit and in the drill hole is sealed by a high pressure seal operating in the clean fluid provided in the reservoirs, and the total volume of the drilling fluid circulates through the bit nozzles.

Elastohydrodynamic Lubrication of Grease-Lubricated Rolling Bearings

Abstract: The lubricant film thickness of grease-lubricated, cylindrical roller thrust bearings was measured, using a capacitance type displacement probe. For comparison, the same tests were also performed with the bearings lubricated with mineral oils. The film thickness and friction torque as a function of rotational speed were determined both under fully flooded and starved lubrication conditions. The test results show that the lubricant film thickness in grease-lubricated bearings is influenced by the base oil, and the thickener. Presented as an American Society of Lubrication Engineers paper at the ASLEIASME Lubrication Conference in Minneapolis, Minnesota, October 24–26, 1978

Thrust washer retaining band

Abstract: An annular band fits over a thrust washer of a thrust bearing. At least one but preferably a plurality of circumferentially spaced radially extending protrusions are provided on the annular band. The protrusions are adapted to provide an interference fit between the thrust washer and the support such as a housing on which the thrust washer is mounted.

Bearings for continuous casting roller aprons

Abstract: Rollers used in roller aprons, which support and guide the metal strand formed in a continuous casting mold, are made of a fixed shaft and elongated roller sleeve sections which are rotatably mounted upon the shaft. The shafts are fastened upon spaced apart rails secured to support plates. Bearings are arranged between the ends of each sleeve section and its shaft. Each bearing comprises a journal type bearing part and a thrust type bearing part. The journal type bearing part includes a cylindrical bronze sleeve non-rotatably fitted within its roller section end. A "Teflon", bronze impregnated, thin wall liner bushing is fitted within a wide recess formed in the interior wall of the outer end of the bronze sleeve to thereby form about one-half of the journal bearing inner wall surface which is arranged in rotatable contact with its shaft. A bored support member, through which the shaft is extended and which connects the shaft to a rail, has a cylindrical part fitted into an endwise opening channel in the adjacent roller sleeve end. A transversely arranged, disk-like thrust bearing plate mounted on the inner transverse surface of the cylindrical part, engages with the co-planar, annular surfaces forming the outer ends of the bronze sleeve and its Teflon liner bushing to provide the thrust bearing part.

Overdrive unit in automatic transmissions

Abstract: An overdrive unit in an automatic transmission having a planetary gear set including a helical gear and a thrust bearing interposed between the sun gear and revolving carrier for supporting any thrust loads produced between the sun gear and the carrier, thereby reducing the amount of any external force to be exerted on the outer race of the one-way clutch and thus improving the durability of the one-way clutch.

Swash plate hydraulic gear

Abstract: PURPOSE: To prevent a shoe from floating up and vibrating under ordinary shoe machining accuracy in such a way that the shoe surface at the outer end of a plunger is slid to brought into contact with a swash plate successively gathering a seat plate, a thrust bearing, a thrust plate, etc. together while placing them to face each other on the back face of the shoe, and coupling the thrust plate to the swash plate holder under an elastic pressure. CONSTITUTION: A shoe 10a provides a flange 10b on its outer periphery, those back faces of the flange 10b has one common seat plate 70 overlapped, in addition spline connection 73 is made in such a way that a thrust plate 72 which faces the back face of the seat plate 70 by inserting a thrust bearing 72 between them can be freely slid in the axial direction to a swash plate holder 24. Besides, the back face of the thrust plate 72 has an overlapped spring 74 which resiles 74 under pressure toward the seat plate 70, and the back face of the spring 74 has a fitting plate 75 to give the determined set load and to be fixed to the swash plate holder 24 by means of a bolt 76. COPYRIGHT: (C)1982,JPO&Japio

Thrust bearing with tapered lands

Abstract: A bored thrust bearing having a bearing face formed in series with tapered lands for forming a thrust load-carrying oil film, each tapered land being formed with a foot surface having a given sloping angle (β) and an upper surface having a gentle sloping angle (α) less than the given sloping angle, the foot surface and the upper surface having therebetween a rounded boundary

Hydrodynamic compliant thrust bearing and method of making

Abstract: A resilient compliant hydrodynamic fluid film thrust bearing includes a top bearing sheet of thin metalic foil material, and a lower supporting sheet of the same or slightly heavier gauge material. The top bearing sheet is stamped to produce an annular array of truncated sector-shaped flaps attached to the array along one radially extending edge. The second section is stamped to produce an annular pattern of raised projections formed by bending the material along slits to form radially extending bumps which resiliently support the first section. The two sheets are superimposed and aligned, and are welded together along the edge by which the sector-shaped flaps are attached to the first section. The welded assemblies are then sheared from the superimposed foils and deburred.

Suspended loads rotating bearing and hydraulic motor - has inner rotor with bearings and radial cylinders contacting stator cams

Abstract: The hydraulic motor is used for rotating suspended loads about a vertical axis, consists of cylinders in the rotor enclosed by the stator. Pistons are arranged into these radial cylinders. The stator and rotor include also bearings in a robust and compact system. A drum with cylinders hs roller bearings at both ends. These bearings act as radial and thrust bearings. A fluid distributor is connected rigidly to stator or to cam housing. A rotating connector is fitted between distributor and the lower end flange of the rotor.

Clutch slave cylinder sealing device - has ring-shaped pressure chamber with damped seal and attached thrust rods

Abstract: A non-leaking clutch slave cylinder has a ring shaped pressure chamber (8) about the clutch shaft (49) with a pressure inlet (10) and a clamped membrane (12). The outside of the membrane is fitted with thrust rods (2) linked to the thrust bearing (3). The hydraulic circuit is totally sealed. No sliding seals are required, reducing fluid losses considerably. The membrane is clamped into the ring shape by a cover plate (1) with the ends rolled over, and with profiled guides (11) in the top surface to guide the thrust rods.

Thrust bearing cooling apparatus

Abstract: A spring-mounted thrust bearing having pads that are immersed in lubricant and provided with coolant-distributing grooves in the face of each thrust pad is combined with a high pressure pumping means connected to force a flow of coolant between the thrust pad bearing surfaces and an associated runner surface in a high volume that is between 1/3 and 1/2 the flow rate of lubricant that is swept between those surfaces by normal relative rotation of the surfaces.

Combined thrust and support bearing for turbo-generators

Abstract: A combined thrust and support bearing for turbogenerators, wherein within a stationary bearing block there is freely displaceable in the direction of the shaft axis a bearing housing rigidly connected with the end face or side of the turbine housing. Both of the thrust bearings and the support bearing arranged therebetween are fixed in axial direction within the bearing housing.

Self-centering thrust bearing assembly

Abstract: A self-centering thrust bearing assembly, in which the bearing comprises one ring intended to cooperate with a driving unit of the clutch assembly, whereas its other ring is mounted on an axial movable support driven for the clutching operation, said mounting being provided with a certain radial clearance and a resilient pinching action in axial sliding rest on said support. The pinching action is substantially carried out by first fastening means exerting a pinching stress localized from the ring to the support so that it constitutes for the ring the center of a pivoting movement which is superposed to the radial sliding clearance for the self-centering process.

Thrust bearing wear detector positioner

Abstract: A thrust bearing wear detector is mounted on a positioning apparatus which is capable of moving the sensor a predetermined fixed distance toward and away from a rotating collar fixed to a turbine shaft. The positioning apparatus comprises a fixed piston, a movable piston, and a movable casing in which the pistons are slidable. Additionally, bias means, such as springs, position the pistons and the sensor in a predetermined, fixed position until working fluid is delivered under pressure through channels in the fixed piston. The positioning apparatus of the present invention readily facilitates verification of the proper operation of the wear detector.

Low axial stiffness thrust bearing

Abstract: A low axial stiffnesss thrust bearing is disclosed. The thrust bearing includes a housing having a generally cylindrical space formed therein and a generally cylindrical thrust collar located coaxially within the space. The axial length of the cylindrical space is sufficiently greater than the axial length of the thrust collar to permit the thrust collar to move axially within the cylindrical space over a predetermined distance and to insure that first and second fluid chambers are formed on opposite sides of the thrust collar when the thrust collar is located centrally within the cylindrical space. A fluid circuit supplies fluid under pressure to the first and second chambers in such a manner that the fluid attempts to maintain the thrust collar at a predetermined axial location within the space even when external thrust forces are placed on the thrust collar.

Power steering device

Abstract: PURPOSE:To provide a steering shaft with a large steering reaction force by a construction wherein a hydraulic pressure acts in a direction opposite to that of piston displacement, in a hydraulic power steering gear in which an adequate steering reaction force is applied to a steering wheel during operation of the latter. CONSTITUTION:During operation of a steering wheel, in the case where a spool 30 is displaced downward, a hydraulic liquid in a liquid chamber 32 enters a liquid chamber 5 through gaps in a thrust bearing 41, through a gap 24 between the inside peripheral surface of the spool 30 and an input shaft 38, and through gaps in a thrust bearing 40, and applies a hydraulic pressure to the lower end face of the shaft 38. On the other hand, a liquid chamber 15 on the side of the upper end of the shaft 38 is communicated with a liquid chamber 37 through the groove of a spline joint between the shaft 38 and a yoke 13, and the hydraulic pressure is released into a liquid tank. Reversely in the case where the spool 30 is displaced upward, the hydraulic liquid is fed from a hydraulic pump into the chamber 37, a dwonward thrust is applied from the chamber 15 to the shaft 38, generating a steering reaction force.

Spindle device for machine tool

Abstract: PURPOSE:To enable a single tool spindle to cover the speed range from low speed heavy cut work to high speed finishing work by interposing pressurized fluid between the tool spindle, radial bearings and a thrust bearing to avoid a direct contact between them. CONSTITUTION:Fluid having pressure adjusted by a pressure regulator valve 83 in a pressurized fluid generator 79 is jetted from nozzles 101, 103, 105 through respective supply holes 87, 89, 91, 93 of radial and thrust bearings 9, 11, 29 so that a tool spindle 19 is supported with load bearing rigidity in the radial and thrust directions. Under this condition is operated a rotary drive unit 29 to rotate the tool sprindle 19 and machine a workpiece with a working tool attached to an end of the spindle 19. Since then pressurized fluid is interposed between the tool spindle 19 and the respective radial and thrust bearings 9, 11, 29 to avoid their direct contacts, exothermic reaction and power loss are reduced so that the single tool spindle 19 can cover the speed range from low speed heavy cut work to high speed finishing work.

Thrust bearing misalignment monitor

Abstract: An apparatus for continuously monitoring the alignment condition of a thrust bearing based on a pair of temperature differences is adapted to utilize either analog or digital means. The monitor is particularly applicable for use in large turbines, particularly those coupled to generators for the production of electric power. Bearing misalignment and other variables are determined from temperature measurements of the oil feed temperature and from two temperature measurements made on diametrically opposite portions of the bearing surface. The apparatus of the present invention is made possible by observed predetermined relations between certain computed temperature differences which relate bearing thrust and misalignment moment and which also relate minimum oil film thickness and actual misalignment slope.

Nested Belleville spring support for compliant thrust bearings

Abstract: A compliant hydrodynamic fluid thrust bearing includes a resilient support system having a two-stage spring arrangement for supporting a flexible bearing sheet. The spring arrangement includes a bundle of nested Belleville springs arranged in parallel and a corrugated spring member arranged in series with the Belleville spring bundle. This arrangement provides an overall spring characteristic of relatively low stiffness under light load, an increased stiffness under the loads normally encountered during operation of the bearing, and a decreased stiffness under loads in excess of the rated capacity of the bearing. This spring characteristic enables the bearing sheet to deflect early under light hydrodynamic loads to assure the correct filt with respect to the thrust runner to establish supporting fluid films; to support the axial load during normal operating conditions; and to deflect under extreme transient loads to share misalignment or gross vibration loads with adjacent bearing areas.

Device for supporting roll

Abstract: PURPOSE:To stably support a roll of small diameter but large length or the like, by providing static pressure thrust bearings movably in the longitudinal direction of the roll and interposing a spring between the thrust bearing and a bearing housing. CONSTITUTION:The thrust bearing 5 is provided in the bearing housing 4 so that the thrust bearing can move in the axial direction of the roll 1. The thrust bearing 5 has a pressure reception surface 5a on the side of the end of the roll. The thrust collar 6 having a push surface 6a corresponding to the pressure reception surface 5a is fitted on the part of the roll 1, which projects from the thrust bearing. The thrust collar 6 is coupled to the roll 1 by a key 7 so that the thrust collar can move in the axial direction of the roll and follow up the rotation thereof. Nuts 12 are screw-engaged on both the ends of the roll 1. The leaf spring is interposed between the thrust bearing 5 and the bearing housing 4 to apply tension to the roll 1. The push surface 6a of the thrust collar 6 and the pressure reception surface 5a of the thrust bearing 5 are thus always concentrically adjoined to each other.