A sealing method of motor shafts under rotations simultaneous with rectilinear motions with magnetic fluids between the motor shaft and the radial magnet with a single pole.

摘要

The present invention relates to a sealing device used in industry, food, and special fields, etc. The existing sealing device has prevented a smooth rotational movement or a linear movement due to friction with the shaft of the place to be sealed.;The disadvantage of the existing sealing device is the wear of the sealing due to friction, and the increased frictional resistance causes the reduction of rotational force, the friction sound, the breaking of the shaft due to the wear of the sealing device, and the shortening of the life of the parts due to the breaking of the seal. This may cause contamination of the place of use due to the leakage of the material to be sealed, which causes damage to the equipment.;Especially for use in liquids or in special environments, special sealing devices must be used.;The reduction of the rotational force due to the use of the sealing device and the existing sealing device are easily worn out, and when the sealing device is worn out, regular inspection due to the replacement of the sealing device is required, thereby reducing the industrial productivity.;The present invention consists of a radial magnet (2) magnetized by one pole of the inner and outer diameters of the rotating shaft or the working part to be sealed using a magnetic oil to compensate for the above problems of the existing sealing device. The magnetic fluid is magnetically induced by the magnetic force of the radial magnet (2) by filling the space with water-soluble or oily magnetic fluid so that it is strongly adsorbed by the magnet, sealing the rotating shaft or the working part to act as a sealing device in the place where pressure is applied. It is.;The design of the present invention uses magnetic fluid, so that the reduction of rotational force is very small compared to the existing sealing device, and the rotational force is little. The friction coefficient of the device is almost no noise and vibration, and the gap between the magnet and the sealing part is narrow, The higher the magnetic field strength, the greater the sealing effect, so that a sealing device with a strong or weak working pressure can be constructed, depending on the application.;In order to construct the present invention, as shown in FIG. 1, a ring-shaped magnet is required to have a radial magnet 2 having a single pole inside and outside, which is installed in an inner groove of the outer housing 3, and is provided between a magnet and an operating shaft. The magnetic fluid does not leak to the outside even when the fluid is rotated at high speed, and the magnetic fluid 1 is adsorbed with a strong force by the magnetic force of the radial magnet 2 installed in the outer housing 3, so that There is no leakage of the loaded area even if the external pressure is applied.;However, it is possible to ensure a stable sealing effect of the sealing device within the range not departing from the limit of the adsorption force generated by the magnetic force acting between the radial magnet (2) and the magnetic fluid (1). In addition, the present invention was made to be equipped with the present sealing device by simply processing the bolt hole (7) for fixing the existing device as shown in (Fig. 4), (Fig. 5).