Abstract: There are provided a work-side position measurement device and a drive-side position measurement device for directly measuring positions of roll chocks in a rolling direction, and positions of upper and lower working rolls and upper and lower backup rolls in the rolling direction are adjusted to zero point or predetermined positions. Alternatively, a change caused in the strip wedge due to a minute crossing of the axes of working rolls and backup rolls is calculated, and the quantities of leveling of a work-side rolling reduction cylinder device and a drive-side rolling reduction cylinder device are adjusted to make the strip edge equal to or smaller than a predetermined value. Accordingly, the bilateral asymmetry (strip wedge) of the thickness distribution of a rolled material is easily adjusted even in the event that the positions of the roll chocks in the rolling direction are changed due to wear on various components.

Abstract: There are provided a work-side position measurement device and a drive-side position measurement device for directly measuring positions of roll chocks in a rolling direction, and positions of upper and lower working rolls and upper and lower backup rolls in the rolling direction are adjusted to zero point or predetermined positions. Alternatively, a change caused in the strip wedge due to a minute crossing of the axes of working rolls and backup rolls is calculated, and the quantities of leveling of a work-side rolling reduction cylinder device and a drive-side rolling reduction cylinder device are adjusted to make the strip edge equal to or smaller than a predetermined value. Accordingly, the bilateral asymmetry (strip wedge) of the thickness distribution of a rolled material is easily adjusted even in the event that the positions of the roll chocks in the rolling direction are changed due to wear on various components.

Abstract: There are provided a work-side position measurement device and a drive-side position measurement device for directly measuring positions of roll chocks in a rolling direction, and positions of upper and lower working rolls and upper and lower backup rolls in the rolling direction are adjusted to zero point or predetermined positions. Alternatively, a change caused in the strip wedge due to a minute crossing of the axes of working rolls and backup rolls is calculated, and the quantities of leveling of a work-side rolling reduction cylinder device and a drive-side rolling reduction cylinder device are adjusted to make the strip edge equal to or smaller than a predetermined value. Accordingly, the bilateral asymmetry (strip wedge) of the thickness distribution of a rolled material is easily adjusted even in the event that the positions of the roll chocks in the rolling direction are changed due to wear on various components.

Abstract: A rotation detection device to solve the above-described problems includes: accelerometers installed to be spaced apart from each other at predetermined pitches around a rotating shaft of a rotary machine, the accelerometers detecting rotation vibration of the rotary machine and outputting vibration signals; and a signal processing unit that acquires the vibration signals from the accelerometers. The signal processing unit includes: an installation information acquisition means for acquiring installation radii of the accelerometers with respect to the rotating shaft; an analysis processing means for acquiring frequency responses and coherences for the vibration signals; a determination means for determining whether or not the coherences are greater than a predetermined threshold value; and a rotation period calculation means for calculating a rotation period of the rotating shaft from the frequency, the phase difference, the predetermined pitch, and the installation radii.

Abstract: A measuring device provided is a measuring device that is connected to at least one sensor, and includes a power source unit connected to an outside power source as a power supplying source and configured to be supplied with input power, from the outside power source, in which a modulation power signal is superimposed on power-source power for the measuring device, and also includes a controller configured to control the presence or absence of supply of power to the at least one sensor based on the modulation power signal.

Abstract: What is provided is a photovoltaic module device which is configured to supply electric power to a first target device installed on a rotating body which is rotationally driven, in which a plurality of photovoltaic cells constituting a photovoltaic cell column are connected to configure a parallel circuit, and a plurality of photovoltaic cell columns are disposed in an axial direction with positions of seam portions thereof in a circumferential direction of the rotating body deviated from each other.

Abstract: There is provided a variable speed increaser including a planetary gear transmission device which changes the speed of a rotational driving force of the electric driving device and transmits the changed rotation driving force to a driving target, and a rotation rate controller. The electric driving device includes a constant-speed motor having a constant-speed rotor, and a variable-speed motor having a variable-speed rotor and driven in a regenerative mode and in a power mode. A rotation rate of the output shaft varies within an operation range between a maximum rotation rate and a minimum rotation rate. The constant-speed motor has a rated torque which allows the output shaft to have the maximum rotation rate by itself. The rotation rate controller changes the rotation rate of the output shaft rotating within the operation range by driving the variable-speed motor only in the regenerative mode.

Abstract: A linear motion mechanism, including a drive portion, a screw shaft which is rotationally driven about an axis by the drive portion and in which a first spiral screw groove is formed on an outer peripheral surface, a nut in which a second spiral screw groove facing the first screw groove is formed on an inner peripheral surface and which moves forward or backward relative to the screw shaft in an axial direction, in which an axis of the screw shaft extends, according to a rotation of the screw shaft, a plurality of load balls which are disposed in a transfer path formed by the first screw groove and the second screw groove and advance while rolling on the transfer path, a plurality of retainer frames which are disposed between the plurality of load balls and advances on the transfer path along with the load balls.

Abstract: There is provided a variable speed increaser including a planetary gear transmission device which changes the speed of a rotational driving force of the electric driving device and transmits the changed rotation driving force to a driving target, and a rotation rate controller. The electric driving device includes a constant-speed motor having a constant-speed rotor, and a variable-speed motor having a variable-speed rotor and driven in a regenerative mode and in a power mode. A rotation rate of the output shaft varies within an operation range between a maximum rotation rate and a minimum rotation rate. The constant-speed motor has a rated torque which allows the output shaft to have the maximum rotation rate by itself. The rotation rate controller changes the rotation rate of the output shaft rotating within the operation range by driving the variable-speed motor only in the regenerative mode.

Abstract: A linear motion mechanism (27) is provided with: a cylinder rod (312) into which a ball screw (30) can be inserted, said cylinder rod (312) including a base end section that is connected to a nut (311) within a piston casing (36) and a tip section (312a) that is exposed on the outside of the piston casing (36); a nut-side grease supply hole (321) that is formed in the nut (311) and that includes a discharge port (323) that opens toward the outer circumferential surface of the ball screw (30); and a cylinder rod-side grease supply hole (322) that is formed in the cylinder rod (312), that includes on one end thereof an inlet (324) that opens at a position that is exposed to the outer section of the piston casing (36), and that includes another end (322b) that is connected to the nut-side grease supply hole (321).

Abstract: There are provided a work-side position measurement device and a drive-side position measurement device for directly measuring positions of roll chocks in a rolling direction, and positions of upper and lower working rolls and upper and lower backup rolls in the rolling direction are adjusted to zero point or predetermined positions. Alternatively, a change caused in the strip wedge due to a minute crossing of the axes of working rolls and backup rolls is calculated, and the quantities of leveling of a work-side rolling reduction cylinder device and a drive-side rolling reduction cylinder device are adjusted to make the strip edge equal to or smaller than a predetermined value. Accordingly, the bilateral asymmetry (strip wedge) of the thickness distribution of a rolled material is easily adjusted even in the event that the positions of the roll chocks in the rolling direction are changed due to wear on various components.

Abstract: A linear motion mechanism, including a drive portion, a screw shaft which is rotationally driven about an axis by the drive portion and in which a first spiral screw groove is formed on an outer peripheral surface, a nut in which a second spiral screw groove facing the first screw groove is formed on an inner peripheral surface and which moves forward or backward relative to the screw shaft in an axial direction, in which an axis of the screw shaft extends, according to a rotation of the screw shaft, a plurality of load balls which are disposed in a transfer path formed by the first screw groove and the second screw groove and advance while rolling on the transfer path, a plurality of retainer frames which are disposed between the plurality of load balls and advances on the transfer path along with the load balls.

Abstract: A valve device includes: an opening and closing section capable of being switched between an open state and a closed state, and a drive section having a rectilinearly moving mechanism configured to move a rectilinearly movable member in forward and backward directions; a transmission section configured to bring the opening and closing section to the closed state when the rectilinearly movable member is moved forward and to bring the opening and closing section to the open state when the rectilinearly movable member is moved backward; and a switching section capable of being switched between a connected state in which the movement of the rectilinearly movable member in the forward and backward directions is able to be transmitted to the transmission section and a disconnected state in which the movement of the rectilinearly movable member in the forward and backward directions is unable to be transmitted to the transmission section.

Abstract: A linear motion mechanism (27) is provided with: a cylinder rod (312) into which a ball screw (30) can be inserted, said cylinder rod (312) comprising a base end section that is connected to a nut (311) within a piston casing (36) and a tip section (312a) that is exposed on the outside of the piston casing (36); a nut-side grease supply hole (321) that is formed in the nut (311) and that comprises a discharge port (323) that opens toward the outer circumferential surface of the ball screw (30); and a cylinder rod-side grease supply hole (322) that is formed in the cylinder rod (312), that comprises on one end thereof an inlet (324) that opens at a position that is exposed to the outer section of the piston casing (36), and that comprises another end (322b) that is connected to the nut-side grease supply hole (321).

Abstract: An adjusting valve drive mechanism of a steam turbine drives an adjusting valve which opens and closes a steam channel, through which steam flows, by a valve element so as to adjust a flow rate of the steam serving as a working fluid of the steam turbine. The adjusting valve drive mechanism includes a rotary motor, a spur gear which is rotated by the rotary motor, and a chain which meshes with teeth of the spur gear, advances and retracts in a predetermined advance/retract direction which is a tangential direction of the spur gear in accordance with rotation of the spur gear, and causes the adjusting valve to advance and retract.