SU1219845A1 - Turbomachine thrust bearing - Google Patents

Description

f

1219845.

ten

15

This invention relates to a turbo-maker, in particular, to thrust bearings of steam and gas turbines and turbo-compressors.

The purpose of the invention is to increase the efficiency of the operation of the thrust bearing by providing an individual supply of oil to the oil seal, simplifying its design and improving the manufacturability.

FIG. 1 shows a thrust bearing; a longitudinal section; figure 2 - section aa in figure 1; on fig.Z - section bb in figure 2.

The thrust bearing of the turbomachine comprises a housing 1, in which the support pads 2 and 3 are installed, respectively, mounted on the backing rings A and 5. Means for the individual supply and discharge of lubricant (oil) are made in the form of adjacently arranged chambers 6 and 7 The lubricant is drained from the body of 8 pads 2 and 3 and placed between the pads 2 and 3 and the stop disc 9 in the inter-cage space 10 with the central angle P of the bearing. The chambers 6 and 7 of the supply and discharge of lubricant are separated by a partition 12 and are limited respectively by the walls 13 in the outer diameter 14 pads 2 and 3 of the DZ and the walls 15 in the inner diameter 16 pads 2 and 3.

. The retaining disk 9 of the rotor 17 with the direction of rotation in arrow 18 restricts the lubricant supply chambers 6 to the pads 2 and 3 and the lubricant discharge chambers 7 from the pads 2 and 3 to a height of 19. There is an annular space between the rotor (shaft) 17 and the pads 2 and 3 20 liters of fresh lubricant supply through the channels 21 and annular channels 22 of the housing, and between the housing 1 and the pads 2 and 3 along their outer diameter 14, a drain ring space 23 is formed (channels for removing oil from the bearing are conventionally not shown). The pads 2 3 have a width of 24 and are installed with a predetermined axial clearance 25 relative to the stop disc 9.

During operation of the thrust bearing, high-pressure lubricant under pressure from the bore space 20 flows into ameres 6 inlets. In this case, the wall 15 prevents the passage of lubricant into the chamber

20

25

35

40

Since the discharge chamber 7 is connected to the pad 3, the temperature of the drain oil in this chamber 7 can serve as a criterion for monitoring the performance of the subgipnik and, as indicated by the resistance thermometer installed in this chamber 7 (not shown), emergency operation modes can be prevented.

7, and the wall 13 reverses the freedom of the seal, which simplifies the design of the fresh lubricant flow into the draining of the protective equipment of the turbomachine, function space 23. Under the influence of the temperature disc 9, which depends on the magnitude of the pumping effect of the pressure disc 9, bearing elements.

the lubricant is injected into the supply chamber 6 and over the entire width of 24 pads 2 and 3, and enters the gap 25, forming a bearing oil wedge. An additional amount of lubricant enters the wedge in the inner diameter of 16 pads 2 and 3. Due to the small size of the passage (live) cross section of the oil wedge in the direction of lubricant flow, its consumption is minimal. The lubricant worked out in the wedge is discharged into the discharge chamber 7 and into the drainage space 23 and evacuated from the thrust bearing housing 1. The pumping effect of the thrust disc 9 contributes to the rapid removal of waste oil (grease) from the drain chamber 7, creating a tendency in this chamber to reduced pressure. Through the gap 25

between the partition 12 and the stop disc 9, a part of the lubricant flows from the chamber 6 to the discharge chamber 7 towards the heated lubricant layer transferred by the stop disc 9 from the previous block 2 or 3, neutralized by efficiently removing the waste of the hot oil for the next block 2 or 3.

Due to the fact that the oil is pumped into the feed chamber 6 by the stop disc 9, it guarantees a constant oil bath in the zone where it is needed, while ensuring that a stable oil wedge is formed over the entire working surface of the pads 2 and 3 and axisymmetric metric work pads 2 and 3 relative to the thrust disk 9 of the rotor. 17 in hydrodynamic parameters. At the same time, due to the fact that the bath oil takes up only about half the volume of the space surrounding the stop disk 9, the mechanical losses in the thrust bearing are significantly reduced by reducing the share of disk losses.

Since the discharge chamber 7 is connected to the pad 3, the temperature of the drain oil in this chamber 7 can serve as a criterion for monitoring the performance of the subgipnik and, as indicated by the resistance thermometer installed in this chamber 7 (not shown), emergency operation modes can be prevented.

Cutting patches, which simplifies the design of the protective equipment of the turbomachine, which functions depending on the temperature of the bearing elements.

/ 3

14

P

/ 3

 .Z VNIIPI Order 1309/46 Circulation 777 Subscription

Branch PPP Patent, Uzhgorod, st. Project, 4

Claims (1)

TURBOCHARGE THRUST BEARING, comprising a housing in which thrust pads are installed on the washer rings with a predetermined axial clearance relative to the rotor thrust disc, having lubrication and discharge chambers located in the interwell space, characterized in that, in order to increase work efficiency , simplifying the design and improving manufacturing technology, the supply and lubrication chambers are made in the block in the form of adjacent chambers separated by a partition and placed between the block and the thrust disk . Figure 1