A machine for manufacturing cables includes a winch that includes a tube, which includes at least a pulley, a reducer and an input shaft to the reducer in its interior. A system for attaching the reducer includes two concentric bearings. An outer bearing is attached to the reducer and the tube, and an inner bearing is attached to the pulley and outer bearing, such that the pulley is supported by the inner bearing and by bearings of the input shaft of the reducer.

A machine for manufacturing cables includes a winch that includes a tube, which includes at least a pulley, a reducer and an input shaft to the reducer in its interior. A system for attaching the reducer includes two concentric bearings. An outer bearing is attached to the reducer and the tube, and an inner bearing is attached to the pulley and outer bearing, such that the pulley is supported by the inner bearing and by bearings of the input shaft of the reducer.

A grease composition includes base oil, a thickener, and an inorganic additive. The base oil is a poly--olefin having a base oil kinematic viscosity of 15 to 50 mm.sup.2/s at 40 C. The thickener is a diurea expressed by Structural Formula (1). The content of the thickener is 10 to 22 mass % with respect to the total amount of the base oil and the thickener. The inorganic additive is a mixture containing sepiolite and bentonite, and is organically modified. The content of the inorganic additive is 2 to 20 mass % with respect to the total amount of the base oil and the thickener.
R.sup.1NHCONHR.sup.2NHCONHR.sup.3(1)

A grease composition includes base oil, a thickener, and an inorganic additive. The base oil is a poly--olefin having a base oil kinematic viscosity of 15 to 50 mm.sup.2/s at 40 C. The thickener is a diurea expressed by Structural Formula (1). The content of the thickener is 10 to 22 mass % with respect to the total amount of the base oil and the thickener. The inorganic additive is a mixture containing sepiolite and bentonite, and is organically modified. The content of the inorganic additive is 2 to 20 mass % with respect to the total amount of the base oil and the thickener.
R.sup.1NHCONHR.sup.2NHCONHR.sup.3(1)

The present invention relates to a method for determining a state of a bearing of a three phase electric machine, the electric machine having a rotor, which is supported by the bearing, the electric machine being connected to a three phase inverter for supplying the electric machine with electric power, the three phase inverter being controlled to apply a pulse width modulation with a predefined scheme to create three phase currents, the method comprises: determining a first phase current provided to the electric machine; determining a second phase current provided to the electric machine, the second phase current being different to the first phase current; determining the power spectral density of the park's vector based on the first phase current and the second phase current; determining an amplitude of the power at a predefined frequency of the power spectral density, wherein the predefined frequency depends on the rotational speed of the rotor and the scheme of the pulse width modulation; comparing the amplitude of the power at the predefined frequency with a predefined power value; anddetermining, based on the comparison, whether a failure of the bearing has occurred or the bearing is degraded.

The present invention relates to a method for determining a state of a bearing of a three phase electric machine, the electric machine having a rotor, which is supported by the bearing, the electric machine being connected to a three phase inverter for supplying the electric machine with electric power, the three phase inverter being controlled to apply a pulse width modulation with a predefined scheme to create three phase currents, the method comprises: determining a first phase current provided to the electric machine; determining a second phase current provided to the electric machine, the second phase current being different to the first phase current; determining the power spectral density of the park's vector based on the first phase current and the second phase current; determining an amplitude of the power at a predefined frequency of the power spectral density, wherein the predefined frequency depends on the rotational speed of the rotor and the scheme of the pulse width modulation; comparing the amplitude of the power at the predefined frequency with a predefined power value; anddetermining, based on the comparison, whether a failure of the bearing has occurred or the bearing is degraded.

A method for operating a bearing (10), in particular roller bearing or sliding bearing or linear bearing, with at least a first energy supply module (1, 2, 3, 4) and a second energy supply module (1, 2, 3, 4), wherein a first control unit of the first energy supply module (1, 2, 3, 4) and a second control unit of the second energy supply module (1, 2, 3, 4) are configured to control outputting of energy of the respective energy supply module (1, 2, 3, 4) according to a predefined supply strategy, wherein the first control unit and/or the second control unit receive/receives a supply request and controls the outputting of energy by the respective energy supply module (1, 2, 3, 4) as a function of the supply request and the predefined supply strategy.

A spindle device includes: a spindle shaft; a first housing configured to house the spindle shaft to which a gas is supplied, the first housing having a bearing that rotatably supports the spindle shaft; a motor located at an end of the spindle shaft and configured to rotate the spindle shaft; a second housing configured to house the motor, the second housing being joined to the first housing; and a duct having one end located at the bottom of a space inside the second housing and another end projecting from the second housing.

The present disclosure is directed to a system and methods for the service and exchange of a yaw bearing for a machine head of a wind turbine. The yaw bearing servicing and exchange system has a support stand. The support stand includes a base assembly and at least one support post extending perpendicularly from the base assembly. The support stand also includes at least one first post cap removably coupled to the support post and at least one leveler operably coupled to the at least one first post cap for establishing a level orientation of a support surface with respect to a horizontal plane.

The present invention provides a silicon nitride sintered body including silicon nitride crystal grains and a grain boundary phase, wherein the silicon nitride crystal grains are covered with the grain boundary phase and width of the grain boundary phase is 0.2 nm or more. It is preferable that the width of the grain boundary phase is 0.2 nm to 5 nm. Additionally, it is preferable that the silicon nitride sintered body includes 15% by mass or less of the grain boundary phase. According to the above-described configuration, it is possible to provide a high-temperature-resistant silicon nitride sintered body in which degradation of the grain boundary phase under high temperature environment is suppressed. This silicon nitride sintered body is suitable for constituent material of a high-temperature-resistant member, use environment of which is 300 C. or higher.