Composite bearings with high precision of rotation, good rigidity, high bearing capacity, no wear, high durability. The following is static pressure NTN bearings in the maintenance
process to explore and try to obtain a few experiences, for your
reference.
1.
Hole throttle: (1). The internal throttling to an external throttling,
and installation of pressure gauges immediately show the pressure on the
chamber. Make maintenance easy, in particular, can be easily cleaned on a regular basis, which is the internal throttle can not match.
(2). Throttle ratio. Throttle than the theoretical value of β is between 1.2 to 1.5, but based on years of experience to 1.25 is better. This
maintenance, the need for geometric precision spindle, before and after
the bearing geometry, concentricity, roundness and taper strictly
controlled in order to ensure the beta value. According to the bearing capacity of the machine to determine the
value of e (spindle and bearing geometric center eccentricity), the β
value of the best.
(3)
When the oil chamber is not installed spindle, the oil column of each
outlet must be consistent (observation method), if inconsistent, should
be taken to change the throttle aperture method to change its flow. To
4 cavities, for example, under the general, left and right cavity of
the oil column between 20 ~ 25mm, hole diameter of 0.25 ~ 0.4mm. 3.
Oil supply system improvements: Static pressure NTN bearing oil supply
system, in addition to coarse filter, fine filter, the rest of the
components on the static pressure NTN bearings have a protective effect. On the basis of the original system to improve the fuel supply system.
(1).
The oil outlet behind the throttle plate is connected with pressure
relay and pressure gauge (formerly in front of the accumulator) so that
the operator can see the size of the chamber pressure and pressure. When the pressure is greater than a certain value, in order to immediately shut down, so as to avoid bearing pad lock. Such as: pressure 2MPa, the outlet cavity pressure 1.2 ~ 1.6MPa, less than 1.2MPa will stop.
(2)
increase the number of detection devices: NTN Bearing static pressure
between the spindle and the bearing 0.04 ~ 0.05mm gap between the oil
has a certain resistance value, the detection of this change in
resistance, we can see the period The size of the gap. To the pole as a pole, bearing the other pole, measuring the resistance changes. This
signal processing sent to the photoelectric alarm and control system
amplifier, control the spindle motor start and stop, in order to avoid
the shaft and tile friction.
CATEGORIES
Latest news
- FB090/FB092 Wrapped Bronze Bearings
- Shock Absorber Upper & Lower Bush
- Hollow Shaft Magnetic Ferrofluid Vacuu
- Bronze Sliding Du Bush Bearing, Bronze
- Magnetic Ferrofluid Vacuum Sealing Fee
- Metal-polymer,Low Friction,Plain Beari
Contact us
- ADD: No.503,Hunan International Commerce Center, Jintai Square,Changsha 410001,Hunan
- TEL: 86-731-84770165
- FAX: 86-731-84770163
- E-mail: sales4@@slide-bearing.com
> Industry news