444results about "Rotary bearings" patented technology

A abnormality diagnosing apparatus used in a machine equipment including a rotating or sliding part relative to a stationary member includes a detecting portion 31 fixed to the rotating or sliding part or the stationary member and including a vibration sensor 32 and a temperature sensor 33, and a signal processing portion 81 for determining a state of the part from a detecting signal outputted by the detecting portion 31. The signal processing portion 81 determines presence or absence of a abnormality, or presence or absence of the abnormality and a degree of a damage of the part based on a combination of a measured result by the vibration sensor 32 and a measured result by the temperature sensor 33.

Degradation of the lubricant due to contamination of the lubricant with wear particles or moisture, which greatly affects the service life of rolling bearings, can be detected in a cost-effective manner through the use of a resonance frequency band signal or high-frequency signal of an accelerometer, and the service life of a rolling bearing can be estimated with high precision at an early stage on the basis of the detected state of the wear particles and lubricant.

Provided is a method comprising baseline data acquisition means for obtaining vibration signals by using an accelerometer 4 and using a testing device to acquire resonance frequency band signals detectable at the highest sensitivity, for each specification such as model number, manufacturer name, and other specifications for a rolling bearing 3 as pertains to the relationship between the state of wear particle penetration in a rolling bearing 3 and the vibration/bearing service life, and to lubricant degradation and vibration/bearing service life; measurement means whereby an accelerometer 4 is used to obtain vibration signals for the rolling bearing 3 whose remaining service life is being assessed and which resides on a fan, a pump, or another rotating device 1, 2, for the purpose of measuring resonance frequency band signals detectable at the highest sensitivity; and determination means for estimating the state of wear particle penetration and the state of lubricant degradation of the diagnostic rolling bearing 3, and computing the remaining service life of the diagnostic rolling bearing 3 by using measurement values obtained by the measurement means, determination results of the bearing specification determination means, and data obtained by the baseline data acquisition means.

An improved diesel engine water pump includes three main features that aid in extending the maintenance-free life of the pump. The impeller shaft is carried by tapered roller shaft support bearings of which the impeller bearing has a floating outer race that is urged axially by a preload spring to provide a prescribed axial preload that maintains concentricity of the shaft with the axis and prolongs bearing life. An improved oil seal combines an oil slinger, a stationary deflector and a lip oil seal with a return passage to the engine to more effectively limit oil leakage from the pump. An improved water seal includes pressurized water jets fed from the pump volute that flush wear particles from the water seal surface and increase water seal life. Further details of these features are also disclosed.

A reciprocating-piston internal combustion engine having a hydraulic adjustment mechanism which is assigned to a connecting rod and which comprises at least one eccentric, for adjusting at least one variable compression ratio in at least one cylinder of the reciprocating-piston internal combustion engine by means of a change in an effective length of a connecting rod. Also proposed is a method for changing the effective length of a connecting rod.

A drive assembly for a wind turbine includes a rotor hub, a supporting structure, a planetary gear transmission unit having sun, planet and ring gears and a planet carrier. The ring gear is non-rotatably secured to the supporting structure. A main bearing rotatably supports the rotor hub and planet carrier relative to the ring gear and supporting structure. The drive assembly further includes two substantially independent force transmission paths for transmission of forces reacting with forces exerted by the wind turbine rotor hub. A first of the force transmission paths acts from the rotor hub via the main bearing to the supporting structure primarily for transmission of overhang load forces and bending moment forces and a second of the force transmission paths acts from the rotor hub via the planet carrier primarily for transmission of rotational forces.

A wheel rotation detecting device including a sensor unit that is supported on a stationary ring which does not rotate even when the wheel is in use, and the rotation of the wheel that is attached to a rotary ring can be detected by a rotation detecting sensor held within the sensor unit. Within the sensor unit, in addition to a rotation detecting sensor, there are disposed other sensors such as a temperature sensor and a vibration sensor, thereby allowing detection of the rotation speed and the rotation number of the wheel supported on the rotary ring, as well as detection of other car driving conditions.

A pitch bearing and related method for wind electric turbines has an annularly-shaped first bearing ring connected with an associated wind turbine blade, and includes a first raceway groove. An annularly-shaped second bearing ring is connected with the rotor portion of the wind turbine, and includes a second raceway groove aligned with the first raceway groove. Rolling elements are positioned in the first and second raceway grooves to rotatably interconnect the two bearing rings. A gear segment is formed on one of the bearing rings, and is configured to engage a pitch drive portion of the wind turbine to pivot the blade axially between different pitch angles. The gear segment has an arcuate measure of less than 200 degrees to facilitate economical manufacture.

A reducer of an electronic power steering apparatus is disclosed. The reducer of an electronic power steering apparatus aids the operation of a steering wheel by the driver by preventing a clearance from being caused by frictional wear between a worm and a worm wheel, by reducing rattle noise caused by backlash, and by minimizing the change in the clearance due to a change in torque.

The invention relates to a reversing valve (1), particularly a reversing valve (1) with a ballpoint pen mechanism (2) for controlling hydraulic fluid flow. The ballpoint pen mechanism can be alternately latched in a first or a second positions and is coupled with the reversing valve (1) by applying a control pulse (I) on the actuation means (3) of the ballpoint pen mechanism (2), so that the first or the second position is respectively correspondent to the first or the second switch positions of the control piston (6) of the reversing valve (1). The invention further relates to a combustion engine having an adjustable compression ratio, which comprises the above reversing valve (1) and a connection rod arrangement (3). The connection rod arrangement (3) has an eccentric device (36) capable of being adjusted in a hydraulic mode, which is arranged inside a connection rod bearing hole (34) and/or a crane bearing hole (35) for adjusting the effective length of the connection rod (leff). The adjusting stroke of the eccentric device (36) can be controlled by the reversing valve (1).

The invention pertains to an engine mount onto an aircraft structure comprising at least one connection means between a first and a second element such as an engine case and said structure, characterized by the fact that said connection means comprises an eccentric member housed in a bore of the first element, being rotational about a first axis, the eccentric member comprising a trunnion attached to the second element and of axis off-centred with respect to the first axis of rotation, the eccentric member being rotational about said off-centred axis.

The solution of the invention has the advantage of allowing a compact assembly.

A four-row cylindrical roller bearing is incorporated into between the inner peripheral surface of a housing and the outer peripheral surface of a backup roller. A sensor unit 7 is held in a portion of a collar disposed in the axial-direction end portion of the four-row cylindrical roller bearing. The sensor unit comprises a detect part for detecting temperatures and vibrations and a transmitter device for transmitting signals, which are obtained after output signals taken out from the detect part are processed, as radio signals. On a portion of a hold cover which is a separate member from the collar, there is disposed a receive antenna which is part of a receiver apparatus for receiving the radio signals transmitted by the transmitter device.

To provide a thermal spray membrane contact material, contact member and contact part and an apparatus to which they are applied, showing excellent seizure resistance and wear resistance even under high surface pressure/low speed sliding, high speed/high temperature sliding, or high surface pressure/high speed sliding. In a bucket connecting apparatus connecting an arm and a bucket by a work implement connecting pin, the above-mentioned work implement connecting pin comprises a base material made of steel having an axis function and a contact surface formed of a thermal spray membrane contact material film-formed on the base material, said contact surface being placed at least on a supported surface site of the work implement connecting pin relative to a bracket and on a slipping contact surface with a work implement bushing, further, said thermal spray membrane contact material being composed of a Mo metal phase, or 10 vol % or more of a Mo metal phase and a metal phase and/or alloy phase containing one or more elements selected from the group consisting of Fe, Ni, Co, Cr, Cu and Zn.

A condition detection apparatus comprising an AE sensor 1 that detects AE waves, which elastically-occur when a plurality of balls included in an LM system self-rotate and revolve within a circulation section at the same time, and generates detection signals Sae, and a signal processing unit 4 that generates a first parameter indicating an intensity of the AE waves based on the generated detection signals Sae, generates based on the detection signals Sae a second parameter by weighting only detection signals Sae temporally-continuously detected among the detection signals Sae, generates based on the detection signals Sae a third parameter by weighting only detection signals Sae temporally-discontinuously detected in correspondence with the movement of the balls among the detection signals Sae, and judges contents of an operational condition of the LM system using any one of the first, second or third parameter, is provided to enable prognosis of occurrences of failures in the LM system, to improve maintainability for a user of the LM system, and to contribute to the prolonging of the operation life of the LM system as well as performance assurance and quality improvement of apparatuses or devices incorporated with the LM system.

An internal combustion engine with adjustable compression ratio with a connecting rod bearing eye for connecting to a piston of the at least one cylinder and an eccentrical element adjustment device for adjusting an effective connecting rod length, and wherein the eccentrical element adjustment device includes an eccentrical element cooperating with an eccentrical element lever and eccentrical element rods engaging the eccentrical element lever, wherein the eccentrical element rods are loaded with a hydraulic pressure that is provided in hydraulic cavities interacting with the eccentrical element rods, wherein the eccentrical element lever includes at least one eccentrical element lever segment, wherein the at least one eccentrical element lever segment is positioned in axial direction of the eccentrical element in front and/or behind the connecting rod bearing eye, and wherein the at least one eccentrical element lever segment is fixated at the eccentrical element.

A planetary gear train is provided with a planetary gear and a planetary pin inserted into the planetary gear. The planetary gear includes: a gear member having teeth on the outer face and a through hole; an intermediate housing inserted into the through hole and having an insert hole into which the planetary pin is inserted; and a plurality of sliding bearing members jointed onto the insert hole of the intermediate housing. The plurality of sliding bearing members form a sliding bearing which sustains the planetary pin and the planetary gear to be rotatable with each other.

A drivetrain for a wind turbine and a method for lubricating a bearing in a drivetrain of a wind turbine are disclosed. The drivetrain includes a rotatable component and a bearing surrounding the rotatable component. The drivetrain further includes a lubrication passage in fluid communication with the bearing for providing lubrication fluid thereto, and a drainage passage in fluid communication with the bearing for removing lubrication fluid therefrom. Further, the drivetrain includes a dry sump in fluid communication with the drainage passage. The dry sump includes a pump operable to flow lubrication fluid from the drainage passage.

A variable compression ratio piston (26) and connecting rod (18) assembly for an internal combustion engine (14) includes an eccentric bushing (28) that carries a piston pin bushing (42) and contains a journaled portion (48) held in the rod bore (24) of the connecting rod (18). The eccentric bushing (28) can be selectively rotated between either of two angle adjusted positions to effect a change in the height of the piston (26) relative to the connecting rod (18), and thus change the compression ratio of the assembly. A latch (50) mechanism is actuated by oil jets (90, 91) external to the connecting rod (18). The latch (50) includes bolts (54, 56) with tapered tips that seat in oblong holes (60, 62) in a flange plate (58) to reduce destructive lash. A resilient stop post (80) bears the brunt of stresses associated with stopping the flange plate (58) during switching events to protect the latching bolts (54, 56).

A torsion coil spring 30 applies an elastic force to a worm shaft 29 in a direction towards a worm wheel, via a pre-load pad 70. The pre-load pad 70 restricts displacement in relation to the widthwise direction, by one side face portion of a holder 61 fixed to a gear housing 22. Due to the elastic deformation of the pre-load pad 70 itself based on the elastic force of the torsion coil spring 30, the side face of the pre-load pad 70 is abutted against the one side face portion of the holder 61, so that a gap between the pre-load pad 70 and the one side face portion is minimized. As a result, the occurrence of a teeth fitting noise in the worm reduction gear 16 is suppressed.

A piston assembly and connecting rod therefor is provided. The connecting rod has an elongate body extending to an end for operable attachment to a piston. The end has a wrist pin bore extending between opposite sides of the body. The wrist pin bore has a wavy profile extending between the sides. The wavy profile has at least one concave surface with a valley extending along a circumferential direction of the wrist pin bore and convex surfaces having peaks extending along a circumferential direction of the wrist pin bore on laterally opposite sides of the valley. The peaks and valleys cooperate to form a smooth load gradient and uniform lubrication flow across the interface region between the wrist pin bore and the wrist pin extending therethrough.

An adjustable clevis assembly includes a clevis, a first adjustment sleeve, a second adjustment sleeve, a tongue and a clevis pin. The clevis includes a first support flange with a first sleeve aperture and a second support flange with a second sleeve aperture. The first adjustment sleeve is seated in the first sleeve aperture, and includes a first pin aperture that is eccentric relative to the first sleeve aperture. The second adjustment sleeve is seated in the second sleeve aperture, and includes a second pin aperture that is eccentric relative to the second sleeve aperture. The tongue is arranged between the first support flange and the second support flange. The clevis pin extends through the first pin aperture, the second pin aperture and a third pin aperture in the tongue.