Composite rotary bearing its high precision, good rigidity, high capacity, no wear and durability. Here is the hydrostatic bearing NTN explore and try a few lessons learned during maintenance:
1. Orifice device:
(1). The external internal throttle to throttle, and to install the upper and lower chamber pressure gauge real-time display. Make maintenance easy, in particular, can easily be cleaned regularly, this is an internal restrictor incomparable.
(2) The throttle ratio. Throttle than the theoretical value of β is between 1.2 to 1.5, and 1.25 based on years of experience preferred. Such
maintenance, the need for geometric precision spindle, front and rear
pad geometric accuracy, concentricity, roundness and taper strict
control in order to guarantee the value of β. Determine the value of e (the eccentricity amount of the spindle and
bearing geometric center) in accordance with the carrying capacity of
the machine, so that the best value β.
(3)
Each oil chamber when the spindle is not loaded, the oil port of each
column must be consistent oil (observation). If not, should be taken to
change the method of the restrictor aperture to change its flow. In the chamber 4 as an example, generally, the left, the right chamber
of the oil column between 20 ~ 25mm, pore diameter of 0.25 ~ 0.4mm.
2. The fuel supply system improvements:
NTN
hydrostatic bearing oil supply system, in addition to coarse filter,
fine filter, the remaining elements of the hydrostatic bearing NTN has a
protective effect. In the original system on the basis of the fuel supply system improvements.
(1)
The ground pressure switch and pressure gauge in the throttle plate
after the oil port (the original front in the accumulator), which allows
the operator to see the size of the chamber pressure and stress. When the pressure is greater than a certain value, in order to immediately shut down to avoid locking bush. Such as: pressure 2MPa, export chamber pressure 1.2 ~ 1.6MPa, 1.2MPa lower than is necessary to stop. (2) increase the digital detection devices:
Between
the spindle and bearing hydrostatic bearing NTN clearance 0.04 ~
0.05mm, during which the oil has a certain resistance value, detect
changes in this resistance, it is possible that the size of the gap. In a spindle pole, bearing another pole, measure the resistance change. After
processing this signal sent to the photoelectric alarm and control
system amplifier controls the spindle motor start and stop, in order to
avoid friction axis and tile.
CATEGORIES
Latest news
- Ferrofluid Vacuum Feedthrough Seals us
- Which one is wear-resistant, steel sle
- Bimetal Flange Bush Bearing
- Selection standard for dimension refer
- Red color ptfe bushing
- Pipe-Mounted Ball Transfer
Contact us
- ADD: No.503,Hunan International Commerce Center, Jintai Square,Changsha 410001,Hunan.
- TEL: +86 731 84770165
- FAX: +86 731 84770163
- E-mail: sales1@slide-bearing.com
> Industry news