CN203257885U

CN203257885U - Sliding bearing with pressure maintaining ring

Info

Publication number: CN203257885U
Application number: CN 201320161137
Authority: CN
Inventors: 陈刚; 李大正; 何锋发
Original assignee: SHANGHAI YIFENG ELECTROMECHANICAL TECHNOLOGY DEVELOPMENT Co Ltd
Current assignee: SHANGHAI YIFENG ELECTROMECHANICAL TECHNOLOGY DEVELOPMENT Co Ltd
Priority date: 2013-04-01
Filing date: 2013-04-01
Publication date: 2013-10-30
Anticipated expiration: 2023-04-01

Abstract

The utility model provides a sliding bearing with a pressure maintaining ring. The sliding bearing comprises a covering, a bearing bush, the pressure maintaining ring and a pedestal. According to the bearing with the pressure maintaining ring, the leakage rate of high-pressure lubricating oil is effectively reduced under the action of the pressure maintaining ring, so that a shaft can be in a jacked state by virtue of the flow much smaller that of a hydrostatic bearing; and as the friction area is greatly reduced, the friction force is smaller than that of the hydrostatic bearing.

Description

Sliding bearing with the pressurize ring

Technical field

The utility model patent has been described a kind of new-type sliding bearing, belongs to support and the transmission field of heavy turning round equipment.

Background technique

That sliding bearing has is simple in structure, easy accessibility, bearing capacity is high, friction factor is low, can withstand shocks and the plurality of advantages such as vibration, life-span length, smooth running noise free, is widely used and every field.In heavy turning round equipment, sliding bearing is usually used to support huge revolution part, and the main bearing in equipment such as rotary kiln, tuber grinder, Steel Ball Coal Mill all adopts sliding bearing.

Main bearing is divided into two kinds of hydraulic bearing and hydrostatic bearings, and the pumping effect when hydraulic bearing utilizes the axle journal rotation is brought lubricant oil between axle journal and bearing shell into, forms the separately oil film of rubbing surface.Hydraulic bearing must carry out accurate scraping to bearing shell during installation in order to form reliable oil film, counts with contacting of axle journal to guarantee tiling, otherwise will cause when moving even tile kilning of watt temperature rise.The oil film of hydraulic bearing is thinner, and friction factor is larger, and transmission efficiency is lower than hydrostatic bearing, and fricative a large amount of heat, must force cooling at the inner logical cooling water of bearing shell simultaneously.

The axle journal of hydrostatic bearing and bearing shell are separated fully by the extreme pressure lubricant that the external world supplies with, and the formation of oil film is not subjected to the restriction of relative sliding velocity.Oil slick thickness is larger than hydraulic bearing, and especially the core intersection at oil sac place will reach several millimeters, so friction factor is less than hydraulic bearing, need not Forced water cooling.Hydrostatic bearing must provide extreme pressure lubricant continuously in oil sac, the guarantee axle journal is in the jack-up state always.Because the perfection that can't accomplish axle journal and bearing shell is fitted, the gap between axle journal and bearing shell is leaked a large amount of high pressure oils, and in order to keep the oil pressure in oil sac, so the requirement of high pressure oil is very large, operating cost is very high.

Summary of the invention

The utility model patent provides a kind of new-type sliding bearing one by one with the sliding bearing of pressurize ring, compares with existing hydrodynamic sliding bearing, need not bearing shell is carried out accurate scraping, and friction factor is low, need not Forced water cooling; Compare with existing static-pressure sliding bearing, friction factor is low, and the extreme pressure lubricant consumption is little.

Technological scheme

In conjunction with Fig. 1, formed by case 1, bearing shell 2, pressurize ring 3, base 4 with the sliding bearing of pressurize ring.In conjunction with Fig. 2, the oil sac 6 outside processing one circle grooves 5 at bearing shell 2 are placed with the pressurize ring 3 of being made by the self lubricating material of resiliency compressible in groove 5.In conjunction with Fig. 4, during the sliding bearing inoperative, there is no extreme pressure lubricant in oil sac 6, axle 8 and bearing shell 2 connecting parts, pressurize ring 3 is pressed in the groove 5 of bearing shell 2.In conjunction with Fig. 5, during sliding bearing work, extreme pressure lubricant enters in oil sac 6 by oil inlet hole 7, and due to the seal action of pressurize ring 3, the lubricating oil pressure in oil sac 6 raises gradually, and axle 8 is by jack-up, and pressurize ring 3 is along with resilience.After pressurize ring 3 sprang back to certain altitude, with no longer resilience, high pressure oil continued to enter oil sac 6 and goes out from the slot leakage between pressurize ring 3 and axle 8, and the pressure in oil sac 6 reaches balance, and axle 8 also no longer raises.Due to the effect of pressurize ring 3, effectively reduced the leakage rate of extreme pressure lubricant, so with the little a lot of flow of the hydrostatic bearing that compares, axle 8 is in by the jack-up state.The core intersection that this moment, (except oil sac 6 places) formed between axle 8 and bearing shell 2 is the height of pressurize ring 3 resiliences, is approximately 1mm; The core intersection at oil sac 6 places is the degree of depth 3mm that the height of pressurize loopback bullet is added oil sac 6, is approximately 4mm; Oil slick thickness between axle and pressurize ring 3 is approximately tens microns.During bearing working, axle 8 is in complete isolation with bearing shell 2.

Description of drawings

Fig. 1 is the structure principle chart with the sliding bearing of pressurize ring;

Fig. 2 is the bearing bush structure schematic diagram;

Fig. 3 is pressurize ring structure schematic diagram;

Fig. 4 is the sliding bearing off working state schematic diagram with the pressurize ring;

Fig. 5 is the sliding bearing working state schematic representation with the pressurize ring;

Description of reference numerals

The 1-case; The 2-bearing shell; 3-pressurize ring; The 4-base; The 5-groove; The 6-oil sac; The 7-oil inlet hole; The 8-axle;

Embodiment

Below by with relatively this patent further being set forth of plain bearing.

Pumping effect when hydraulic bearing utilizes the axle journal rotation is brought lubricant oil between axle journal and bearing shell into, forms the separately oil film of rubbing surface, and the very thin thickness of oil film is only tens microns.Suppose that axle journal and bearing shell separated by oil film fully, the frictional force F=μ * A of bearing * v/ δ, μ are the kinetic viscosity of lubricant oil, and A is the film area between axle journal and bearing shell, and v is the linear velocity of the relative bearing shell of axle journal, and δ is oil slick thickness.As seen the frictional force F of bearing and oil slick thickness δ are inversely proportional to, and namely oil film is thinner, and frictional force is larger.Friction produces a large amount of heats, so hydraulic bearing must be forced cooling at the inner logical cooling water of bearing shell.Hydraulic bearing must carry out accurate scraping to bearing shell during installation in order to form reliable oil film, counts with contacting of axle journal to guarantee tiling, otherwise will cause when moving even tile kilning of watt temperature rise.

The axle journal of hydrostatic bearing and bearing shell are separated fully by the extreme pressure lubricant that the external world supplies with, and the formation of oil film is not subjected to the restriction of relative sliding velocity.The sealing effect of the surface of contact of axle journal and bearing shell is poor, after extreme pressure lubricant enters oil sac, can leak from the surface of contact of axle journal and bearing shell, so must there be enough large extreme pressure lubricant flow just can make oil sac produce enough pressure with axle jack-up.In hydrostatic bearing when work, must be continuously provide the extreme pressure lubricant of large flow in the oil sac, and the guarantee axle journal is in the jack-up state always, and operating cost is relatively high.Because the core intersection at oil sac place reaches several millimeters, the oil slick thickness of comparing between axle journal and bearing shell tens microns is much bigger, so the frictional force of hydrostatic bearing mainly results from the oil film between axle journal and bearing shell.The oil slick thickness of hydrostatic bearing is larger than hydraulic bearing, so friction factor is less than hydraulic bearing, need not Forced water cooling.

Because compressible pressurize ring is installed in the outside of oil sac, so in oil sac in oil-filled process, due to the seal action of pressurize ring, extreme pressure lubricant can not revealed, only need the flow seldom just can be with axle jack-up with the sliding bearing of pressurize ring.The pressurize ring certain height of resilience thereupon simultaneously is about after 1mm no longer resilience.High pressure oil continues to enter oil sac and goes out from the slot leakage between pressurize ring and axle, and the pressure in oil sac reaches balance, and axle also no longer raises.Due to the effect of pressurize ring, effectively reduced the leakage rate of extreme pressure lubricant, so with the little a lot of flow of the hydrostatic bearing that compares, axle is in by the jack-up state.The core intersection that this moment, (except the oil sac place) formed between axle and bearing shell is the height of pressurize loopback bullet, is approximately 1mm; The core intersection at oil sac place is the degree of depth 3mm that the height of pressurize loopback bullet is added oil sac, is approximately 4mm; Oil slick thickness between axle and pressurize ring is approximately tens microns.During bearing working, axle and bearing shell are in complete isolation.Due to the thickness of the oil reservoir thickness much larger than oil film, so mainly result from oil film between axle journal and pressurize ring with the frictional force of the sliding bearing of pressurize ring, the frictional force that other oil reservoir place produces is very little, can ignore.The area of pressurize ring and journal friction face is very little, is only 1%～2% of bearing shell tiling, also little than hydrostatic bearing with the frictional force of the sliding bearing of pressurize ring as can be known according to frictional force F=μ * A * v/ δ.

Claims

1. the sliding bearing with the pressurize ring is comprised of case, bearing shell, pressurize ring, base, it is characterized in that being equipped with the pressurize ring on bearing shell.

2. the sliding bearing with the pressurize ring according to claim 1, is characterized in that: process a circle groove outside the oil sac of described bearing shell, be placed with the pressurize ring of resiliency compressible in groove.

3. the sliding bearing with the pressurize ring according to claim 1, it is characterized in that: described pressurize ring is to be made by the self lubricating material of resiliency compressible.

4. the sliding bearing with the pressurize ring according to claim 2 is characterized in that: in described oil sac during the underfill extreme pressure lubricant, the pressurize ring is entered the groove in the oil sac outside of bearing shell by axial compression; When oil-filled in oil sac, the pressurize ring seals; During by jack-up, the pressurize ring is the certain height of resilience thereupon, and can effectively reduce the leakage of extreme pressure lubricant when axle.