please contact sales@tanchin.hk for any inquiry
Static pressure NSK bearings with its high rotation accuracy, good steel, high bearing capacity, no wear, high durability.
1. Small hole restrictor:
(1). The internal throttle to external throttle, and install the pressure gauge to immediately show the upper and lower chamber pressure. So that easy maintenance, in particular, can be easily cleaned regularly, which is the internal throttle can not match.
(2) throttling ratio. The theoretical value of the throttle ratio β is between 1.2 and 1.5, and 1.25 years is based on years of experience. In this way, the geometric accuracy of the spindle, the geometric accuracy of the front and rear bearings, coaxiality, roundness and taper are strictly controlled in order to ensure the value of β. According to the carrying capacity of the machine to determine the e value (spindle and bearing geometric center of the eccentricity), so that the best value of β.
(3). The oil chamber in the absence of the spindle, the oil out of the oil port must be consistent (observation method), if not consistent, should be taken to change the throat of the throttle method to change its flow. To 4 cavity, for example, generally, the left and right chamber of the oil column between 20 ~ 25mm, small hole diameter of 0.25 ~ 0.4mm.
2. Thin film feedback restrictor:
Thin film feedback throttling NSK bearing stiffness is very large, but the machine is also running in the running tile, pull hair, pressure and other phenomena. Film feedback is the most critical film, in practice that the bearing lock, pull the main reason is: ① thin film caused by plastic deformation; ② slow feedback. External load mutation, the film has not react, the shaft and the tile has been friction; ③ film fatigue. The film is used for a long time, fatigue deformation, which is equivalent to changing the feedback parameters.
Increase the thickness of the film and switch to some of the fatigue resistance of the material, can receive good results. Generally, a method of using a rigid film, a preload, and a reserved gap is used. The specific approach is: 1.4mm thick film to 4mm thick rigid film, 0.05mm thick in the lower cavity padded foil, so that the spindle adjusted to a higher than the ideal location of 0.05mm position. The purpose is when the spindle force (wheel weight, cutting force), just return to the ideal center.


please contact sales@tanchin.hk for any inquiry
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