JPH0169194U - - Google Patents

Description

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing the main part of the bearing of a rotary compressor which is an embodiment of this invention, and Fig. 2 is a main part of the bearing of a rotary compressor which is another embodiment of this invention. FIG. 3 is a cross-sectional view showing a main part of a bearing of a rotary compressor according to another embodiment of the invention, and FIG. 4 is a cross-sectional view showing the bearing shown in FIGS. 1 and 2. 5 is a plan view showing the thrust surface of the bearing in FIG. 3, and FIG. 6 is a plan view showing the thrust surface of the bearing in FIG.
Figure 7 is a sectional view showing the main parts of the bearing part of the rotary compressor in operation, Figure 7 is a sectional view showing the conventional rotary compressor, and Figure 8 is the main part of the bearing part of the conventional rotary compressor. FIG. 9 is a sectional view showing the cross section of the rotor, and FIG. 9 is a comparison diagram showing the limits of vertical movement of the rotor during actual operation of the rotary compressor of this invention and the conventional rotary compressor. In the figure, 1: closed container, 4: electric element, 6
: Rotating shaft, 8: Main bearing, 8a, 9a: Thrust surface, 9: End bearing, 10: Cylinder, 12: Compression element, 20a, 20b, 20c: Annular groove, 21a, 2
1b, 21c: annular groove. In addition, in the figures, the same reference numerals and symbols indicate the same or equivalent parts.

Claims (1)

[Claims for Utility Model Registration] (1) An electric element and a compression element are provided in a closed container, and a rotating shaft connecting the electric element and the compression element is supported between the electric element and the compression element, and a cylindrical a main bearing that closes an opening on the side of the electric element of the cylinder; and an end bearing that pivotally supports the rotation shaft on the side of the compression element opposite to the electric element and closes an opening of the cylinder on the side opposite to the electric element. In a rotary compressor having a rotary compressor, each of the thrust surfaces of the main bearing and the end bearing is carved around the insertion portion of the rotating shaft so as to increase the contact area with the rotating shaft in accordance with the amount of bending during rotation of the rotating shaft. A rotary compressor characterized by having an annular groove. (2) The annular grooves formed around the insertion portions of the rotating shafts in the thrust surfaces of the main bearing and the end bearings are concentric with the center of rotation of the rotating shafts, and the annular grooves of the main bearings are The rotary compressor according to claim 1, characterized in that the groove is deeper than the annular groove of the end bearing. (3) The annular grooves formed around the insertion portions of the rotating shafts in the thrust surfaces of the main bearing and the end bearings are concentric with the center of rotation of the rotating shafts, and are parallel to the annular grooves of the main bearings. The rotary compressor according to claim 1, wherein the carved diameter is smaller than the carved diameter of the annular groove of the end bearing. (4) A utility model characterized in that the annular grooves formed around the insertion portions of the rotating shafts in the thrust surfaces of the main bearing and the end bearings are eccentrically formed with respect to the center of rotation of the rotating shafts. A rotary compressor according to claim 1.