CN201215102Y - Large-sized centrifugal water pump bearing housing - Google Patents

Abstract

The utility model relates to a bearing box of large centrifugal pump, which comprises a bearing cap, a ventilation hood, an oil-cooling cavity and an oil ring and a condensing metal pipe arranged in the oil-cooling cavity. The utility model is characterized in that: (1). An annular water-cooling cavity is arranged on the bearing end cap; (2). Nut-type metal plug matched with the aperture of oil injection is arranged on the ventilation hood at the oil injection part at the upper part of the bearing box; a thermometric through hole is vertically arranged at the central part of the metal plug; a ventilation hole is arranged at communicated level with the thermometric through hole. The utility model has the advantages of good lubrication, low running temperature, simple maintenance and high work efficiency.

Description

A kind of large centrifugal water pump bearing case

Technical field

The utility model relates to a kind of large centrifugal water pump bearing case.

Background technique

Indexs such as high-lift, the high pressure of large centrifugal water pump, big flow are the major characters of its operation.Its rotating part bearing bigger radially, axial forces.Bearing various strength as the supporting part bearing housing of rotating part, so bearing housing is the critical piece that guarantees the water pump safe and stable operation from rotating part.The large centrifugal water pump all adopts casing that the sliding bearing of bearing shell formula the makes supporting part as rotating part in the past.The maintenance of sliding bearing, mainteinance repair quality are the keys of restriction water pump safe and stable operation always.Owing to the maintenance complex process, change difficulty, lubrication state is poor, often causes bearing temperature too high, bearing shell scaling loss or locking phenomenon, moreover the maintenance of bearing support often need 3-4 days time, it is very big passive to cause to production.Large-scale in recent years support ball bearing has replaced sliding bearing to be applied on the bearing housing of large pump unit, large centrifugal water pump bearing case, it is the high thrust ball bearing that its bearing housing adopts bearing, the lips outside framework oil seal is adopted in the sealing of bearing (ball) cover part, and lubrication system is made up of fuel reserve tank, band oil ring, oil circuit, oil level peep hole; Cooling system adopts the spirality metal pipe that is positioned in the fuel reserve tank; Using effect compares better.But lubricated, the cooling of ball bearing restricting the safe and stable operation of this bearing housing always.Bearing housing running temperature height, bearing burnt or locking phenomenon happen occasionally.Though the repair cycle is short, the spare parts consumption amount is big, and operating cost is higher.

At present,

The purpose of invention:

The purpose of this utility model is to provide a kind of lubricates well, running temperature is low, maintenance is simple, the large centrifugal water pump bearing case of high working efficiency.

The purpose of this utility model is achieved through the following technical solutions.

A kind of large centrifugal water pump bearing case, its structure comprise bearing cap, vent hood, oil cooling chamber, the band oil ring that is arranged in the oil cooling chamber and condensation metal tube, it is characterized in that:

(1) the annular waterway that on bearing (ball) cover, has;

(2) on oil hole place vent hood above the bearing housing, be provided with the nut formula metal closures that matches with the oiling aperture, on its metal closures, vertically have a thermometric through hole between two parties, have a vent with the thermometric through hole level of communicating.

A kind of large centrifugal water pump bearing case of the present utility model, lubricated good, running temperature is low, maintenance is simple, high working efficiency.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

Embodiment

A kind of large centrifugal water pump bearing case, its structure comprise bearing cap 1, vent hood, oil cooling chamber 2, the band oil ring 3 that is arranged in the oil cooling chamber and condensation metal tube 4, it is characterized in that:

(1) the annular waterway 5 that on bearing (ball) cover, has;

(2) on oil hole place vent hood 6 above the bearing housing, be provided with the nut formula metal closures 7 that matches with the oiling aperture, on its metal closures, vertically have a thermometric through hole 8 between two parties, have a vent 9 with the thermometric through hole level of communicating.

A kind of large centrifugal water pump bearing case of the present utility model adopts the high thrust ball bearing, satisfies the requirement of rotating part preferably.Adopt the lips outside framework oil seal to satisfy seal request.The working procedure of lubrication system: by the band oil ring lubricant oil in the fuel reserve tank is upwards taken up, enter in the bearing ball, enter again in the oil pocket, enter the fuel reserve tank bottom, take up by the band oil ring again and enter next circulation through drainback passage.This process, lubricant oil not only play lubrication, also the ball of bearing and the fricative heat of outer shroud are taken away, and cool off.

In the cooling system, come out to enter lubricant oil in the oil pocket by bearing, Yin Wendu is higher, and the cooling water in this and annular water chamber carries out heat exchange, cooling.This process is necessary, and guaranteeing has a comparatively ideal temperature between bearing (ball) cover and the bearing.The spirality metal pipe of placing in fuel reserve tank cools off the lower floor's oil in the fuel reserve tank, adopts cold water to carry out heat exchange.

By above two-part cooling, guarantee that the oily temperature of lubricant oil satisfies working condition requirement.

Its vent hood is threaded structure, in have a hole to link to each other with inner oil pocket extraneous.Because of lubricant oil in running, meet thermal expansion, make by the air pressure in the oil pocket differently with extraneous air pressure, cause at the observed oil level in oily mirror place more higherly than actual oil level, become false oil level.When the fuel reserve tank inner oil shortage, can not in time find.The nut formula metal closures that matches with the oiling aperture that is provided with on vent hood vertically has a thermometric through hole between two parties on its metal closures, have a vent with the thermometric through hole level of communicating.Air pressure in the fuel reserve tank is consistent and the laying temperature detection device carries out thermometric with extraneous air pressure; This structure has satisfied ventilation, thermometric, inside three functions of oiling.

Claims (1)

1. large centrifugal water pump bearing case, its structure comprises bearing cap, vent hood, oil cooling chamber, the band oil ring that is arranged in the oil cooling chamber and condensation metal tube, it is characterized in that:

(1) the annular waterway that on bearing (ball) cover, has;

(2) on oil hole place vent hood above the bearing housing, be provided with the nut formula metal closures that matches with the oiling aperture, on its metal closures, vertically have a thermometric through hole between two parties, have a vent with the thermometric through hole level of communicating.