Static pressure imported bearing

Source: China Bearing Network Time: 2014-08-08

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In all kinds of bearings; the static sliding bearing is called static pressure bearing. The main feature of the hydrostatic bearing is that it can be completely stopped; it can also establish the bearing oil film; it can ensure that the two time appearances in the launch time conflict There is no direct touch; the dynamic pressure bearing is not reached; at that time, because the static smoothness is different from the dynamic smoothing principle; the hydrostatic bearing is supplied by the external smooth oil pump to form the pressure oil film; to accept the load. Pressure bearings also use a smooth oil pump to supply pressure oil; but its properties are different; the most significant is the different oil supply pressure; SKF hydrostatic bearings have higher oil supply pressure than dynamic pressure bearings. Hydrostatic bearings are in operation Because the conflict has a relative motion; therefore, the dynamic pressure effect can also occur; when the dynamic pressure effect reaches a certain proportion; the bearing becomes a dynamic and static pressure hybrid bearing.
Static pressure imported bearing oil supply system; in addition to coarse filtration, fine filtration; other components have a protective effect on hydrostatic bearings. On the basis of the original system to improve the oil supply system.
(1). After the saving plate, the oil outlet is connected to the pressure relay and the pressure gauge (originally in front of the accumulator); this allows the operator to see the pressure of the chamber pressure and the inlet pressure. When the pressure difference is greater than a certain value; Prevent the axle from locking. For example: the inlet pressure is 2 MPa; the outlet pressure is 1. 2 to 1.6 MPa; less than 1.2 MPa is to stop.
(2). Add digital detection equipment: there is a gap of 0. 04 ~ 0. 05mm between the main shaft of the static pressure imported bearing and the bearing bush; the oil in the process has a certain resistance value; detecting the change of the resistance value; The size of the spindle is one pole; the bearing is the other pole; the resistance value is measured. This signal is sent to the photoelectric alarm and the control system amplifier; the spindle motor is controlled to start and stop; thereby preventing the shaft and the tile Conflict.
Casting for shot blasting hard turning skills using hard turning conditions Hard turning and its characteristics According to PDM's CAPP system, the four characteristics of the laser are completed. Transmission oil pressure test method Early automatic touch car snow form touch precision identification Target of identification of target gear errors
SKF static pressure imported bearings have high reversing precision, good rigidity, high bearing capacity, no wear and high durability. The strengths of static pressure imported bearings are:
1. Both the starting and working time conflicts are separated by the pressure film; the sliding resistance is only from the viscosity of the fluid; the collision factor is small and the operating life is long.
2. Hydrostatic bearings have the effect of "homogenization" errors; they can reduce the impact of inaccuracies in production; therefore, the demand for production accuracy is lower than that of dynamic pressure bearings.
3. The pressure on the vice surface of the conflict is relatively uniform; the reliability and life of the bearing are higher.
4. Accurately achieve the desired bearing function.
5. The temperature distribution of the bearing is more uniform; the thermal expansion problem is not as severe as the dynamic pressure bearing.
Hydrostatic bearings are used in a wide range of conditions; from precision instruments with loads in grams to heavy equipment with loads of thousands of tons, hydrostatic bearings are available.

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