A bearing group that can actively adjust temperature and preload

Abstract

The invention discloses a bearing group capable of actively adjusting temperature and pretightening force. The bearing group includes a fixed ring, a piezoelectric actuator, a pretightening column, a force sensor, at least two bearings, a retaining ring, a bearing sleeve, position stud, limit ring, wireless temperature sensor and two pre-tightening rings; the wireless temperature sensor, limit ring and at least two bearings are installed on the rotating shaft of the peripheral device, and the retaining ring and two pre-tightening rings are set on At least three force sensors are installed on the limit ring and the stop ring; the bearing sleeve is set outside all the bearings and the wireless temperature sensor, and the bearing sleeve is filled with cooling liquid for cooling; the fixed ring is set outside the bearing sleeve On the surface; one end of the pre-tightening column passes through the fixed ring and the bearing sleeve in turn and is inserted between the two pre-tightening rings, and the other end of the pre-tightening column is installed with a piezoelectric actuator; it is fixed outside the piezoelectric actuator Limited studs. The bearing group can actively adjust the temperature and preload while monitoring the temperature and preload.

Description

technical field [0001] The invention relates to the field of mechanical engineering, in particular to a bearing group capable of actively adjusting temperature and pretightening force. Background technique [0002] Bearing is an important part of high-precision device rotation. The smooth operation of bearing determines the performance of high-precision device such as precision, load capacity and service life. With the development of the manufacturing industry, the work requirements for precision transmission devices are getting higher and higher, and traditional bearings can no longer meet the needs of use. In order to meet the requirements of working conditions such as high speed, high rigidity and high load capacity, multiple bearings are usually used in combination. [0003] The Chinese patent with the application number 201821342686.2 discloses a smart bearing with a wireless sensor. The temperature sensing device and the vibration sensing device of the smart bearing a...

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Problems solved by technology

[0003] The Chinese patent with the application number 201821342686.2 discloses a smart bearing with a wireless sensor. The temperature sensing device and the vibration sensing device of the smart bearing are sequentially arranged in the relief hole opened in the outer ring of the bearing to detect the bearing operation process. The temperature rise of the rotating body between the inner and outer rings of the middle bearing and the vibration frequency of the detection bearing; however, the smart bearing needs to change the bearing body, which will affect the stress and deformation of the bearing structure, thereby affecting the bearing capacity of the bearing, and can only monitor the rotation The temperature rise of the body cannot actively adjust the temperature of the smart bearing

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