Lubricated bearing apparatus for hydraulic machinery
AssigneesHitachi, Ltd., The Kansai Electric Co., Inc.
InventorsHisao Inoue, Ichiro Hitomi, Osamu Sugimoto, Teiji Horita
Life of this patent
Estimating the term…
Abstract
A lubricated bearing apparatus for a hydraulic machinery has rotary-side ceramic sliding plates disposed in contact with bearing-side ceramic sliding plates. The rotary-side ceramic sliding plates are disposed in receiving grooves of a main shaft sleeve member fixed to the main shaft. The main shaft sleeve member is provided with preventing portions for preventing the rotary-side ceramics sliding plates from being broken by the centrifugal force. Thus, ceramic materials can be used both on the rotary side and the bearing side, thereby lengthening the usable life of the bearing apparatus.
Claims9
A lubricated bearing apparatus for hydraulic machinery, comprising:
- a runner mounted on the tip of the main shaft, an upper cover covering said runner, a bearing supporting plate that extends upwardly from said upper cover having threaded holes, adjusting screws inserted through said threaded holes, reinforcing support plates disposed in contact with said adjusting screws, bearing ceramic sliding plates mounted on said reinforcing support plates, at least one rotary-side sliding plate disposed in contact with said bearing ceramic sliding plates, and a main shaft sleeve member that is mounted on the main shaft and to which said rotary-side sliding plate is fixed, said adjusting screw being rotatable to bring said bearing ceramic sliding plates into press contact with said rotary-side sliding plate;
- said rotary-side sliding plate being a rotary-side ceramic sliding plate formed of a ceramic material;
- engagement portions in one side surface of said rotary-side ceramic sliding plate, at least one receiving groove in an outer peripheral surface of said main shaft sleeve member for receiving said rotary-side ceramic sliding plate, and said main shaft sleeve member having preventing portions partially extending across said receiving groove for engaging said engagement portions.
A lubricated bearing apparatus for hydraulic machinery, comprising:
- a runner mounted on the tip of a main shaft, an upper cover covering said runner, a bearing supporting plate that extends upwardly from said upper cover, said supporting plate having threaded holes, adjusting screws inserted through said threaded holes, reinforcing support plates disposed in contact with said adjusting screws, bearing ceramic sliding plates mounted on said reinforcing support plates, at least one rotary-side sliding plate disposed in contact with said bearing ceramic sliding plates, and a main shaft sleeve member which is mounted on the main shaft and to which said rotary-side sliding plate is fixed, said adjusting screws being rotatable to bring said bearing ceramic sliding plates into press contact with said rotary-side sliding plate;
- said rotary-side sliding plate being a rotary-side ceramic sliding plate formed of a plurality of divided ceramic material plates;
- engagement portions in one side surface of each of said rotary-side ceramic sliding plate having opposite end portions that are lower in height than a center portion thereof;
- said main shaft sleeve member being divided into at least one pair of main shaft sleeve member pieces, each having an outer peripheral surface;
- each of said main shaft sleeve member pieces having a receiving groove in the outer peripheral surface and preventing portions projecting along a side of the receiving groove into a part of the receiving groove such that said receiving groove receives a plurality of the rotary-side ceramic sliding plates and the engagement portions of the rotary-side ceramic sliding plates engage the preventing portions of the main shaft sleeve member pieces;
- and
- means for fastening each said main shaft sleeve member piece integrally together.
Dependencies are inferred from the claim text.