CN202628816U

CN202628816U - Dynamic pressure static pressure mixing lubricating thrust bearing for steel rolling motor

Info

Publication number: CN202628816U
Application number: CN2012202855956U
Authority: CN
Inventors: 石险峰; 吕振奎; 孙顺富; 余先亮
Original assignee: Ningbo Iron and Steel Co Ltd
Current assignee: Ningbo Iron and Steel Co Ltd
Priority date: 2012-06-14
Filing date: 2012-06-14
Publication date: 2012-12-26
Anticipated expiration: 2022-06-14

Abstract

The utility model relates to a dynamic pressure static pressure mixing lubricating thrust bearing for a steel rolling motor. Two sets of lubricating systems are arranged crossly on a tile plane of a thrust shoe on the side of an electromotor load, wherein one is a dynamic pressure lubricating form which adopts low pressure oil supplying system, and the other one is a static pressure lubricating form which adopts a high pressure oil supplying system. Enough strong static pressure force is produced when the high pressure oil enters a static pressure oil cavity, a high pressure oil slick separates a thrust end plane of the main shaft and a thrust end plane of the bearing, and thereby the abrasion of the end plane of the shaft and the thrust surface of the bearing caused by the dry friction when the main motor turns on or turns off is overcome, and the service life, accuracy and accuracy retentivity of the main shaft are improved. Huge dynamic pressure bearing force is formed by the effect of the dynamic lubricating oil cavity when the main motor revolves. 2000KN bearing force can be formed by the static pressure when a gap of a thrust plate and the thrust shoe caused by the axial float of a rolling mill reaches a certain value, and therefore the bearing capacity of a thrust bearing can be enhanced prominently and the bearing axial force can be huge and more durable.

Description

A kind of thrust bearing of rolling mill motor active and static pressure Mixed lubrication

Technical field

The utility model belongs to Large Electric machining and manufacturing field, particularly relates to a kind of thrust bearing of rolling mill motor active and static pressure Mixed lubrication.

Background technique

Large-scale rolling mill motor thrust bearing is mainly used in the axial float power of carrying the milling train drive line, eliminates the influence of axial float power to motor.Thrust bearing is made up of thrust shoe and thrust button, adopts the hydrodynamic lubrication mode to be lubricated usually.Wherein thrust shoe adopts the Cuprum alloy material, is divided into upper and lower two-part, is separately fixed at the both sides of bearing cover; And thrust button is the shaft shoulder on the motor main shaft.The gap design value of thrust shoe and thrust button is 0.3 ± 0.05mm.Thrust shoe bearing hydrodynamic lubrication is to be connected to the thrust shoe internal oil passages by the low pressure lubricant oil of 0.55Mpa (oil brand is L-TSA68) through oil pipe; The thrust shoe surface is 16 oilholes of distribution evenly; Oilhole is identical with the thrust shoe internal oil passages, around oilhole, leaves oil film wedge and helps forming oil film.Low pressure lubricant oil through 16 oilholes flow out forms hydrodynamic lubrication between thrust shoe and thrust button, and then carries the axial float power of 1000KN.

Domestic majority continuous hot-rolling mill roughing reversable mill all adopts the independent transmission of upper and lower roll at present; On the drive line of rolling mill motor, there is bigger axial float power; Because there is the narrow limitation of low fuel pressure in hydrodynamic lubrication, when present most of roughing master motors had big play power in drive line, the oil film between thrust shoe and the thrust button can't form; Cause thrust bearing directly to contact with transmission shaft; The thrust bearing temperature is raise and the tripping operation of reporting to the police, and both copper scales that produce that are in contact with one another, wear and tear can pollute the motor lubrication system, thereby cause the filter frequent jams.

The model utility content

The utility model technical problem to be solved provides a kind of thrust bearing of rolling mill motor active and static pressure Mixed lubrication, and what mainly solve is that metallurgy industry large-sized rolling mills main motor shaft is to lasting big load axial carrying problem.

The utility model solves the technological scheme that its technical problem adopted: a kind of thrust bearing of rolling mill motor active and static pressure Mixed lubrication is provided, comprises stainless-steel seamless pipe, hydraulic hose, liner, pressing plate; The galvanized steel hex head bolt, FERRULETYPE three-way union, thrust shoe, motor main shaft; Flange, main-axis end thrust surface, end cap, galvanized steel plain washer; Inspection hole, packing ring, FERRULETYPE end union elbow, trim ring; Thrust ring, adjustment pad, low pressure oil inlet pipe, pad; The low pressure oil pocket, high-voltage oil cavity, oil return apparatus, sealing gasket; It is characterized in that: the described motor main shaft outside is with bearing spider, is the main-axis end thrust surface on the relative main shaft at bearing spider two ends, on the main shaft of pressing close to the main-axis end thrust surface, is with thrust shoe, and the first-class radian of thrust ring end face of thrust shoe has paired low pressure oil pocket; Be high-voltage oil cavity between the paired low pressure oil pocket, FERRULETYPE three-way union, stainless-steel seamless pipe and the FERRULETYPE end union elbow in the high-voltage oil cavity outside is communicated with successively and forms a cyclic loop, and the cyclic loop output terminal is communicated with the high-voltage oil cavity filler opening, and the cyclic loop input end is communicated with hydraulic hose.

Described thrust shoe is connected fixing through the adjustment pad with bearing spider.

Thrust ring on the described thrust shoe is pressed close to the main-axis end thrust surface.

Described low pressure oil pocket is communicated with oil supply system through the low pressure oil inlet pipe on the trim ring.

Described cyclic loop input end is communicated with hydraulic hose through the cooperation of liner, pressing plate and galvanized steel hex head bolt.

Described thrust shoe bottom is equipped with oil return apparatus.

Beneficial effect

The utility model produces enough big static pressure bearing capacity when high pressure oil gets in the static pressure oil pocket; The high pressure oil film separates main shaft Thrust Faces and bearing thrust face; Overcome axial end and bearing thrust surface wear phenomenon that dry friction that main motor occurs causes when starting and stopping, having improved the working life and the precision stability of main shaft; Behind main motor rotation, rely on hydrodynamic lubrication oil pocket effect to form bigger dynamic pressure bearing capacity.Static pressure pressure will form the bearing capacity of 2000KN when the axial float from milling train causes thrust button and thrust shoe gap to reach certain value, and the remarkable like this bearing capacity that strengthens thrust bearing has effects such as the axial force of carrying is big and lasting.

Description of drawings

Fig. 1 is the utility model F side thrust shoe schematic representation.

Fig. 2 is the utility model L side thrust shoe schematic representation.

Fig. 3 is the utility model general assembly schematic representation.

Embodiment

Below in conjunction with specific embodiment, further set forth the utility model.Should be understood that these embodiments only to be used to the utility model is described and be not used in the restriction the utility model scope.Should be understood that in addition those skilled in the art can do various changes or modification to the utility model after the content of having read the utility model instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.

Embodiment 1

Like Fig. 1 ~ shown in Figure 3, a kind of thrust bearing of rolling mill motor active and static pressure Mixed lubrication comprises stainless-steel seamless pipe 1, hydraulic hose 2, liner 3; Pressing plate 4, galvanized steel hex head bolt 5, FERRULETYPE three-way union 6, thrust shoe 7, motor main shaft 8; Flange 9, main-axis end thrust surface 10, end cap 11, galvanized steel plain washer 12; Inspection hole 13, packing ring 14, FERRULETYPE end union elbow 15, trim ring 16; Thrust ring 17, adjustment pad 19, low pressure oil inlet pipe 20, pad 21; Low pressure oil pocket 22, high-voltage oil cavity 23, oil return apparatus 28, sealing gasket 30; It is characterized in that: described motor main shaft 8 outsides are with bearing spider, are main-axis end thrust surface 10 on the relative main shaft at bearing spider two ends, on the main shaft of pressing close to main-axis end thrust surface 10 8, are with thrust shoe 7, and the first-class radian of thrust ring 17 end faces of thrust shoe 7 has paired low pressure oil pocket 22; Be high-voltage oil cavity 23 between the paired low pressure oil pocket 22, the FERRULETYPE three-way union 6 in high-voltage oil cavity 23 outsides, stainless-steel seamless pipe 1 and FERRULETYPE end union elbow 15 are communicated with successively and form a cyclic loop, and the cyclic loop output terminal is communicated with high-voltage oil cavity 23 filler openings, and the cyclic loop input end is communicated with hydraulic hose 2.

Described thrust shoe 7 is connected fixing through adjustment pad 19 with bearing spider.

Thrust ring 17 on the described thrust shoe 7 is pressed close to main-axis end thrust surface 10.

Described low pressure oil pocket 22 is communicated with oil supply system through the low pressure oil inlet pipe 20 on the trim ring 16.

Described cyclic loop input end is communicated with hydraulic hose 2 through the cooperation of liner 3, pressing plate 4 and galvanized steel hex head bolt 5.

Described thrust shoe 7 bottoms are equipped with oil return apparatus 28.

At the inner existing dynamic pressure fuel feeding branch road of thrust shoe, static pressure fuel feeding branch road is arranged again.The static pressure tank deck is communicated with static pressure fuel feeding branch road, and the dynamic pressure oilhole is communicated with dynamic pressure fuel feeding branch road, and two fuel feeding branch roads are separate, are not communicated with mutually.Static pressure tank deck and dynamic pressure oilhole evenly alternately are distributed on the thrust tiling.The static pressure branch road of the bearing support both sides high pressure fuel supply pump system of two platform independent respectively adopts the extreme pressure lubricant of supplying with 20Mpa respectively.When the thrust button of either side and thrust shoe gap reach between 0.03mm ~ 0.04mm because of axial float power factor; Form 19Mpa static pressure pressure; Can carry the axial float power of 2000KN, form active and static pressure Mixed lubrication thinking, both can strengthen the lubricating ability of plain thrust bearing; Can utilize static pressure pressure to improve the bearing capacity of thrust bearing again, the thrust bearing bearing capacity of more single hydrodynamic lubrication form increases and is twice.

Claims

1. the thrust bearing of a rolling mill motor active and static pressure Mixed lubrication comprises stainless-steel seamless pipe (1), hydraulic hose (2), liner (3); Pressing plate (4), galvanized steel hex head bolt (5), FERRULETYPE three-way union (6), thrust shoe (7); Motor main shaft (8), flange (9), main-axis end thrust surface (10), end cap (11); Galvanized steel plain washer (12), inspection hole (13), packing ring (14); FERRULETYPE end union elbow (15), trim ring (16), thrust ring (17); Adjustment pad (19), low pressure oil inlet pipe (20), pad (21); Low pressure oil pocket (22), high-voltage oil cavity (23), oil return apparatus (28); Sealing gasket (30) is characterized in that: described motor main shaft (8) outside is with bearing spider, is main-axis end thrust surface (10) on the relative main shaft at bearing spider two ends; On the main shaft of pressing close to main-axis end thrust surface (10) (8), be with thrust shoe (7), the first-class radian of thrust ring (17) end face of thrust shoe (7) has paired low pressure oil pocket (22), is high-voltage oil cavity (23) between the paired low pressure oil pocket (22); FERRULETYPE three-way union (6), stainless-steel seamless pipe (1) and the FERRULETYPE end union elbow (15) in high-voltage oil cavity (23) outside is communicated with formation one cyclic loop successively, and the cyclic loop output terminal is communicated with high-voltage oil cavity (23) filler opening, and the cyclic loop input end is communicated with hydraulic hose (2).

2. the thrust bearing of a kind of rolling mill motor active and static pressure Mixed lubrication according to claim 1 is characterized in that: described thrust shoe (7) is connected fixing with bearing spider through adjustment pad (19).

3. the thrust bearing of a kind of rolling mill motor active and static pressure Mixed lubrication according to claim 1 is characterized in that: the thrust ring (17) on the described thrust shoe (7) is pressed close to main-axis end thrust surface (10).

4. the thrust bearing of a kind of rolling mill motor active and static pressure Mixed lubrication according to claim 1 is characterized in that: described low pressure oil pocket (22) is communicated with oil supply system through the low pressure oil inlet pipe (20) on the trim ring (16).

5. the thrust bearing of a kind of rolling mill motor active and static pressure Mixed lubrication according to claim 1 is characterized in that: described cyclic loop input end is communicated with hydraulic hose (2) through the cooperation of liner (3), pressing plate (4) and galvanized steel hex head bolt (5).

6. the thrust bearing of a kind of rolling mill motor active and static pressure Mixed lubrication according to claim 1 is characterized in that: described thrust shoe (7) bottom is equipped with oil return apparatus (28).