VERTICAL-SHAFT PUMP

PROBLEM TO BE SOLVED: To provide a bearing device including a first sliding portion and a first slide bearing, and a second sliding portion and a second slide bearing, and capable of preventing vibration due to frictional force and destabilization force by a liquid film even in a drying operation, a draining operation including slurry, and the like, without sacrificing abrasion resistance, quickly replacing drainage and air in the bearing device in switching from the draining operation to the drying operation or its reverse switching, having high maintainability of the slide bearing, and easily remodeling and installing an existing machine.SOLUTION: A vertical-shaft pump has a rotating member having a first sliding portion on an outer peripheral face, and a second sliding portion on an inner peripheral face, and rotatable in water and atmospheric air, a first slide bearing supporting the first sliding portion at its an inner peripheral face, a second slide bearing supporting the second sliding portion at its outer peripheral face, and a dust-proof cover for reducing inflow of foreign matters to the first sliding portion and the second sliding portion.SELECTED DRAWING: Figure 6 【課題】耐摩耗性を犠牲にすることなく、ドライ運転時やスラリーを含む排水運転時等においても摩擦力や液膜などによる不安定化力による振動を防止し、排水運転からドライ運転に移った場合やその逆の運転の切り替わりにおいて、軸受装置内の排水と空気の速やかな入れ替えを行えるとともに、すべり軸受のメンテナンス性に優れ、既存機の改造設置が容易な、第１の摺動部と第１のすべり軸受および、第２の摺動部と第２のすべり軸受を備えた軸受装置を提供することを目的とする。【解決手段】本発明に係る立軸ポンプは、外周面に第１の摺動部を有し且つ内周面に第２の摺動部を有し、水中及び大気中で回転可能な回転部材と、前記第１の摺動部を内周面で支持する第１のすべり軸受と、記第２の摺動部を外周面で支持する第２のすべり軸受と、前記第１の摺動部及び前記第２の摺動部に異物が流入することを低減するための防塵カバーと、を有する。【選択図】図６