Rolling bearing device, oil supply unit, method of supplying lubricating oil, and program
AssigneeJtekt Corporation
InventorsTsukasa Sakazaki, Yoshimichi Higashiyama, Masami Naka
Life of this patent
Estimating the term…
Abstract
A rolling bearing device includes: a bearing portion that has an inner ring, an outer ring, a plurality of balls, and a cage that holds the plurality of balls; and an oil supply unit that supplies lubricating oil to the bearing portion. The oil supply unit has: a pump that discharges the lubricating oil through drive of a piezo element; a voltage boost portion that boosts a voltage to be applied to the piezo element; and a control portion that causes the pump to operate while varying a voltage boost time included in a period since the start of voltage boost by the voltage boost portion until the start of the drive of the piezo element.
Claims8
A rolling bearing device comprising:
- a bearing portion that has an inner ring, an outer ring, a plurality of rolling elements interposed between the inner ring and the outer ring, and a cage that holds the plurality of rolling elements;
- and
- an oil supply unit provided adjacent to the bearing portion in an axial direction to supply lubricating oil to the bearing portion, wherein
- the oil supply unit includes:
- a pump that discharges the lubricating oil through drive of a piezo element;
- a voltage boost portion that boosts a voltage to be applied to the piezo element;
- and
- a control portion that causes the pump to operate while varying a voltage boost time included in a period since start of voltage boost by the voltage boost portion until start of the drive of the piezo element such that the voltage boost increases the voltage from a first value greater than zero to a second value greater than the first value and such that varying a voltage boost includes changing voltages from values greater than zero to other values greater than zero.
An oil supply unit provided in a rotary device and configured to supply lubricating oil to an oil supply region of the rotary device that requires oil supply, the oil supply unit comprising:
- a pump that discharges the lubricating oil through drive of a piezo element;
- a voltage boost portion that boosts a voltage to be applied to the piezo element;
- and
- a control portion that causes the pump to operate while varying a voltage boost time included in a period since start of voltage boost by the voltage boost portion until start of the drive of the piezo element, such that the voltage boost increases the voltage from a first value greater than zero to a second value greater than the first value and such that varying a voltage boost includes changing voltage from values greater than zero to other values greater than zero.
A method in which an oil supply unit supplies lubricating oil to an oil supply region of a rotary device that requires oil supply,
- the oil supply unit including a pump that discharges the lubricating oil through drive of a piezo element and a voltage boost portion that boosts a voltage to be applied to the piezo element, the method comprising:
- causing the pump to operate while varying a voltage boost time included in a period since start of voltage boost by the voltage boost portion until start of the drive of the piezo element such that the voltage boost increases the voltage from a first value greater than zero to a second value greater than the first value and such that varying a voltage boost includes changing voltage from values greater than zero to other values greater than zero.
A non-transitory computer readable medium comprising a program that, when executed by a computer, causes the computer to:
- control an oil supply unit that supplies lubricating oil to an oil supply region of a rotary device that requires oil supply, the oil supply unit including a pump that discharges the lubricating oil through drive of a piezo element and a voltage boost portion that boosts a voltage to be applied to the piezo element;
- and
- control the pump to operate while varying a voltage boost time included in a period since start of voltage boost by the voltage boost portion until start of the drive of the piezo element such that the voltage boost increases the voltage from a first value greater than zero to a second value greater than the first value and such that varying a voltage boost includes changing voltage from values greater than zero to other values greater than zero.
Dependencies are inferred from the claim text.