SU1506194A1 - Versions of journal bearing - Google Patents

Abstract

Use: in the energy industry. The purpose of the invention is to increase reliability by improving the thermal mode of operation of the bearing, as well as cost effectiveness by reducing lubricant consumption and friction losses. The bearing contains the upper and lower liner, the inlet channel and the lubrication outlet cavity located in the horizontal plane. The inlet channel and the lubrication outlet cavity are made in the lower liner, wherein the lubricant supply is located at an angle of 15-20 ° to the horizontal plane in the direction of rotation of the shaft, and the lubricant outlet cavity is located at an angle of 45-50 ° to the horizontal plane against the direction of rotation of the shaft. 3 hp ff, 2 ill.

Description

This invention relates to mechanical engineering, in particular to machine parts, support bearings for turret-Jann and generators,

The aim of the invention is to increase reliability by improving the thermal performance of the work, as well as cost effectiveness by reducing lubricant consumption and friction losses.

Fig. 1 shows a slide bearing with inlet and outflow of lubricant in the lower bush (variant T); FIG. 2 shows a bearing with a made lubricant supply in the lower bush (variant TT); Fig. 3 shows a bearing with a made lubricant supply in the lower liner and an eccentric bore, which is mixed relative to the supply axis in the direction of rotation of the shaft (TTa variant); FIG. 4 shows a bearing with a lubricant discharged in the lower part (variant III); Fig 5 shows view A in Fig. 1.4 (variants I, IIl); in Fig „6 view B in Fig, 1.3 (variants I, ТТа); Fig. 7 is a plot of pressure in a lubricant layer of known bearings; Fig. 8 shows experimental dependences of friction losses N and lubricant flow Q on the frequency of rotation of the shaft n under constant load in the proposed variants of the bearing with a diameter of 600 mm; Fig. 9 shows the experimental temperature distribution of the working surface of the lower liner over the average cross section at the nominal frequency of rotation at a constant load in the proposed versions of the bearing with a diameter of 600 mm.

According to figure 1 (option T), the bearing consists of the top 1 and bottom 2 liners. The working surface of 3 boring insertsgey is made of antifriction material. Dp lubricant supply in the lower liner 2 a channel is made, 4 passes through and through the supporting part 5. At the same time, the channel is located at an angle oi., 15-20 and horizontal, the passage is through the axis of the plane bearing in the direction of rotation of the shaft with LO speed,

In the zone of the exit of channel 4 to the working surface 3, an eccentric boring 6 of the radiogap is made (I, whose axis of symmetry is shifted n - 5-S relative to the axis of channel 4 in the direction of the shaft rotation.

In the lower liner, a cavity of grease removal 7 is made, located at an angle j 45-50 ° to the horizontal plane opposite the direction of the shaft 1 and connected to the openings H and 9 ,,

According fig, 2 (version TT) bearing consists of the top 1 and bottom 2 liners. The working surfaces 3 of the bores of the insert are made of an antifriction material. A lubricant channel 4 is provided in the lower liner 2 and passes through the 5o support pad. The channel is located at an angle J. 15-20 to the horizontal plane passing through the bearing axis. shaft with speed and „

According to FIG. 3 (TTA variant), in the zone of exit of channel 4 to working surface 3, an eccentric boring 6 with radius R is made, the axis of symmetry of which is shifted by Vj - 3-5 ° relative to the axis of channel 4 in the direction of shaft rotation

According to FIG. 4 (TTT variant), the bearing consists of the upper 1 and the lower 2 inserted. The working surface of the 3 bores of the insert is made of antifriction material. For the supply of lubricant in the lower liner 2, channel 4 is made, passing through the supporting pad 5 ". At the same time, channel 4 is connected with a hole 10 in the cavity 10 that goes to the working surface 3 in the horizontal plane,

In the lower switch 2, there is a grease removal cavity 7 located at an angle - / j 45-50 to the horizontal plane against the direction of rotation of the shaft W and connected to holes 8 and 9

According to FIG. 5, an opening 9 is connected to a drain pipe 11 o.

According to FIG. 7, the angle Vj is determined on the basis of the location of the zone I2 of negative pressures in the lubricant layer, which is confirmed by a plot of pressures.

The plain bearing (options T-TTT) works as follows.

Lubrication at a certain pressure enters the working surface of the bore 3 through the opening of the channel 4. With the start of rotation of the shaft and as its frequency increases to its nominal value in guaranteed tator between the bore and plg) m is formed

5G) 06

hydrodynamic wedge, which causes the shaft to ascend on the lubricating layer.

Execution in the lower bank 2 channels of supply at an angle

 (

15-20

to the horizontal plane in the direction of rotation of the shaft helps to improve the thermal mode of operation and reduce the consumption of lubricant. This is due to the fact that the supply of lubricant directly into the working area of the hydrodynamic wedge significantly reduces the temperature of the incoming lubricant by eliminating its heating over the angle j 15-20, the magnitude of which is due to maintaining the optimal allowable area for the formation and efficiency of the hydrodynamic wedge operating conditions and conditions of the bearing, for example, turbomachine

In addition, with this organization of the supply of lubricant, the consumption of lubricant is reduced by reducing the irrational leaks that occur in the area of the angle "i).

The offset of the axis of symmetry of the bore 6 relative to the axis of the channel supply 4 at an angle ot 3-5 in the direction of rotation

0

five

0

five

0

94

The uJ shaft ensures uniform distribution of incoming lubricant over almost the entire axial length 1 of the working surface of the bore 3, at the same time increasing lubricant supply to the working area and helps to limit lubricant spreading against the direction of shaft rotation, to the area located above the feed inlet lubricants. In this case, the magnitude of the displacement of the axis of the eccentric bore relative to the axis of the feed hole (angle j) is determined by the diameter of the bore of the working surface D and the feed channel dj,

Through the cavity 7, the main part of the hot used lubricant is discharged through the openings 8 and 9 into the drain line 10 o. The remaining small amount of oil is transferred to the working surface of the bore of the upper part 1.

In this way, the reliability of the substructure is improved by improving the thermal mode of operation, as well as cost-effectiveness by reducing the consumption of lubricant and friction losses.

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FIG. five

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Editor A. Shandor

Tehred M. Hodaiich

Order 5409/38

Circulation 6Qq

VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, F-35, 4/5 Raushsk nab.

Proofreader MSpojo

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Claims (4)

1. A thrust bearing, for example, for a turbomachine, comprising an upper and lower liner, a feed channel and a grease exhaust cavity located in a horizontal plane, characterized in that, in order to increase reliability by improving the thermal mode of operation of the bearing, as well as economy due to to reduce lubricant consumption and friction losses, the feed channel and the grease drain cavity are made in the lower liner, while the grease supply channel is located at an angle of 15-20 ° to the horizontal plane in the direction of rotation of the shaft, and the cavity twater lubricant is angled 45 to 50 to the horizontal plane against the direction of shaft rotation. 2. A thrust bearing, for example, for a turbomachine, containing the upper and lower linings, a feed channel and a grease exhaust cavity located in a horizontal plane, characterized in that, in order to increase reliability by improving the thermal operation of the bearing, as well as economy by reducing the lubricant consumption and friction losses, the lubricant supply channel is made in the lower liner at an angle of 15-20 ° to the horizontal plane in the direction of rotation of the shaft. 3. The bearing according to claim 2, characterized in that, with the goal of improving the conditions for supplying lubricant to the working area, an eccentric bore connected to the supply channel is made on the surface of the lower liner, the axis of symmetry of which is offset by 3-5 relative to the axis of the lubricant supply channel in the direction shaft rotation. 4. A plain bearing, for example, for a turbomachine, comprising upper and lower liners, a lubricant supply channel and a lubricant withdrawal cavity located in a horizontal plane, characterized in that, in order to increase reliability by improving the thermal operating mode of the bearing, as well as economy by reducing the lubricant consumption and friction losses, the lubricant drain cavity is made in the lower liner at an angle of 45-50 'to the horizontal plane against the direction of rotation of the shaft,