CN217328174U

CN217328174U - Structure for improving circulating cooling oil quantity of self-lubricating guide bearing

Info

Publication number: CN217328174U
Application number: CN202220738545.2U
Authority: CN
Inventors: 熊建军; 凡家异; 宋敏; 熊欣; 刘辉; 吕博儒
Original assignee: Dongfang Electric Machinery Co Ltd DEC
Current assignee: Dongfang Electric Machinery Co Ltd DEC
Priority date: 2022-03-30
Filing date: 2022-03-30
Publication date: 2022-08-30
Anticipated expiration: 2032-03-30

Abstract

The utility model belongs to the technical field of hydraulic turbine guide bearing, in particular to improve structure of self-lubricating guide bearing recirculated cooling oil mass. The technical scheme is as follows: a structure for improving the circulating cooling oil quantity of a self-lubricating guide bearing comprises an upper oil cavity and a lower oil cavity which are sleeved outside a main shaft, wherein the upper oil cavity and the lower oil cavity are both connected with a bearing seat, and a bearing bush is positioned in the upper oil cavity; the main shaft is connected with an oil discharge pump plate, a plurality of oil discharge holes are formed in the oil discharge pump plate, the inner sides of the oil discharge holes are communicated with a lower oil cavity, an oil collecting box is connected to the upper oil cavity, the outer sides of the oil discharge holes are communicated with the oil collecting box, the oil collecting box is sleeved outside the oil discharge pump plate, and the oil discharge holes are communicated with the oil collecting box. The utility model provides an improve structure of self-lubricating guide bearing circulative cooling oil mass.

Description

Structure for improving circulating cooling oil quantity of self-lubricating guide bearing

Technical Field

The utility model belongs to the technical field of hydraulic turbine guide bearing, in particular to improve structure of self-lubricating guide bearing recirculated cooling oil mass.

Background

The hydraulic turbine guide bearing needs to bear the radial load that rivers transmitted for the runner in the operation, and this load is great in large-scale unit, and the axle bush calorific capacity is high, will improve the axle bush temperature rapidly, and the axle bush soaks in lubricating oil, and heat transfer gives lubricating oil, consequently need fully cool off by the high temperature lubricating oil of axle bush heating, the safe operation of guarantee unit. The bearing is provided with two chambers, the bearing shell is in an upper oil chamber, and cooling oil is sent to the oil chamber to cool the bearing shell. After the lubricating oil cools the bearing bush, the lubricating oil flows to the lower oil cavity by gravity, the lower oil cavity is hot oil, and the hot oil is output to the cooler for heat exchange and cooling.

As shown in fig. 2, there are two typical ways to feed the high-temperature lubricating oil into the cooler, the high-temperature oil in the lower oil chamber is discharged to the cooler by the pressure difference generated by the speed difference between the inside and outside of the shaft diameter of the main shaft, and in the low-speed unit, the shaft diameter of the main shaft needs to be increased to generate a larger oil discharge pressure. This adds significantly to the weight of the spindle and tends to produce a lower drain pressure. In order to ensure that the oil collecting box does not leak, elastic sealing elements are arranged on the upper side and the lower side of the oil collecting box.

As shown in fig. 3, by installing an external oil pump and using an oil pump set to pump oil, the viscosity of the lubricating oil is high in a low-temperature environment in winter. When the unit starts, the oil pump is difficult to pump oil, and can produce great vibration and noise, thereby influencing safe and stable operation. The added pump package and associated equipment increase unit costs and the complex system increases accident rates. In order to ensure that the upper oil cavity and the lower oil cavity do not leak, an elastic sealing element is arranged on the bearing bush supporting plate.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems existing in the prior art, the utility model aims to provide an improve self-lubricating and lead structure of bearing recirculated cooling oil mass.

The utility model discloses the technical scheme who adopts does:

a structure for improving the circulating cooling oil quantity of a self-lubricating guide bearing comprises an upper oil cavity and a lower oil cavity which are sleeved outside a main shaft, wherein the upper oil cavity and the lower oil cavity are both connected with a bearing seat, and a bearing bush is positioned in the upper oil cavity; the main shaft is connected with an oil discharge pump plate, a plurality of oil discharge holes are formed in the oil discharge pump plate, the inner sides of the oil discharge holes are communicated with a lower oil cavity, an oil collecting box is connected to the upper oil cavity, the outer sides of the oil discharge holes are communicated with the oil collecting box, the oil collecting box is sleeved outside the oil discharge pump plate, and the oil discharge holes are communicated with the oil collecting box.

After cooling oil enters the upper oil cavity to cool the bearing bush, the cooling oil automatically flows into the lower oil cavity, and hot oil in the lower oil cavity flows to the oil discharge pump plate. The oil discharge pump plate is connected to the main shaft and rotates along with the main shaft to generate a pumping action. The size of the oil discharge pump plate can be designed according to the cooling oil quantity required by the bearing, and hot oil in the lower oil cavity can be fully pumped out. The oil discharge pump plate is radially provided with a plurality of oil discharge holes, and discharged hot oil is collected in the oil collection box, so that the collected hot oil can be conveniently and intensively discharged. Hot oil is discharged and then sent to a cooler for cooling, and cold oil is sent to an upper oil cavity, so that the circulating cooling effect is ensured.

As the utility model discloses an optimal scheme, the oil extraction pump board has cup jointed the floating seal ring outward, and in the collection oil box was located to floating seal ring's outside cover, the last through-hole that communicates with the oil drain hole that is provided with of floating seal ring. In order to avoid oil leakage of the cold and hot oil cavities, a floating sealing ring is arranged to adapt to dynamic swing of the main shaft during operation, and a good sealing effect is always kept.

As the utility model discloses a preferred scheme, it is used for supporting the axle bush backup pad of axle bush to go up the intracavity and be fixed with. The bearing support plate reliably supports the bearing bush.

As the preferred scheme of the utility model, the inboard of oil extraction pump board is provided with the guiding gutter that makes things convenient for lubricating oil to get into the oil drain hole. When hot oil reaches the inlet of the oil discharge hole of the oil discharge pump plate, the hot oil can more easily enter the oil discharge hole under the guiding action of the arc-shaped guide groove.

As the utility model discloses an optimal scheme, the region that the bearing frame stretches out the upper oil pocket is provided with the oil extraction passageway of intercommunication upper oil pocket and lower oil pocket, is provided with the oil outlet with oil extraction passageway intercommunication on the upper oil pocket. The oil in the upper oil cavity is discharged into the oil discharge channel through the oil outlet hole, and the oil enters the lower oil cavity through the oil discharge channel under the action of gravity. Therefore, after the bearing bush is fully cooled by cold oil, hot oil can be continuously discharged to the lower oil cavity and then to the cooler, and circulation is realized.

As the preferred scheme of the utility model, it is connected with into oil pipe to go up the oil chamber, advances oil pipe and is connected with the cooler. The oil cooled by the cooler is sent into the upper oil cavity through the oil inlet pipe so as to fully cool the bearing bush.

As the utility model discloses a preferred scheme, the oil inlet pipe stretches the clearance of adjacent axle bush and stretches the axle bush hypomere region, and the oil outlet is located the upper end of upper oil pocket. The oil inlet pipe sends cold oil into the lower section of the bearing bush, the oil outlet is arranged at the upper end of the upper oil cavity, and the oil can be fully contacted with the bearing bush, so that the bearing bush is fully cooled.

As the utility model discloses a preferred scheme, be connected with the oil extraction pipe on the collection oil box, the oil extraction pipe's the other end stretches out the oil cavity down, and the oil extraction pipe stretches out the one end in oil cavity down and is connected to the cooler. Hot oil in the oil collecting box is intensively sent into the cooler through the oil discharging pipe for cooling, and then the oil cooler sends cold oil into the upper oil cavity to realize circulation.

The utility model has the advantages that:

the utility model discloses an oil extraction pump board is connected on the main shaft, along with the main shaft is rotatory, produces the pump suction. The oil drain pump plate has a sufficient length so that the hot oil in the lower oil chamber can be sufficiently pumped out by a pumping action. The oil discharge pump plate is radially provided with a plurality of oil discharge holes, and discharged hot oil is collected in the oil collection box, so that the collected hot oil can be conveniently and intensively discharged. Hot oil is discharged and then sent to a cooler for cooling, and cold oil is sent to an upper oil cavity, so that the circulating cooling effect is ensured.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a first prior art configuration for supplying high temperature lubricant to a cooler;

fig. 3 is a second prior art configuration for supplying high temperature lubricant to a cooler.

In the figure: 1-a bearing seat; 2-an oil inlet pipe; 3-an upper oil cavity; 4-bearing bush; 5-a main shaft; 6-oil discharge pump plate; 7-floating seal ring; 8-an oil collecting box; 9-an oil discharge pipe; 10-a lower oil chamber; 11-oil discharge channel; 31-oil outlet holes; 41-bearing bush supporting plate.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

As shown in fig. 1, the structure for increasing the amount of circulating cooling oil of the self-lubricating guide bearing of the embodiment includes an upper oil chamber 3 and a lower oil chamber 10 sleeved outside a main shaft 5, wherein both the upper oil chamber 3 and the lower oil chamber 10 are connected with a bearing seat 1, and a bearing bush 4 is located in the upper oil chamber 3; be connected with oil extraction pump board 6 on the main shaft 5, be provided with a plurality of oil extraction holes 61 on the oil extraction pump board 6, the inboard and the lower oil pocket 10 intercommunication of a plurality of oil extraction holes 61, the oil feeding chamber 3 is connected with oil collecting box 8, the outside and the oil collecting box 8 intercommunication of a plurality of oil extraction holes 61, the oil collecting box 8 cover is established outside oil extraction pump board 6, a plurality of oil extraction holes 61 and oil collecting box 8 intercommunication. A bearing bush support plate 41 for supporting the bearing bush 4 is fixed in the upper oil chamber 3. The bearing support plate reliably supports the bearing bush 4.

After entering the upper oil cavity 3 to cool the bearing bush 4, the cooling oil automatically flows into the lower oil cavity 10, and the hot oil in the lower oil cavity 10 flows to the oil discharge pump plate 6. The oil drain pump plate 6 is connected to the main shaft 5, and generates a pumping action as the main shaft 5 rotates. The shorter the length of the oil discharge hole 61 in the oil discharge pump plate 6 is, the greater the difference between the linear velocity of the oil inlet end of the oil discharge hole 61 and the linear velocity of the oil outlet end of the oil discharge hole 61 when the main shaft 5 rotates, and the stronger the pumping action. The size of the oil discharge pump plate 6 can be designed according to the cooling oil quantity required by the bearing, so that the hot oil in the lower oil cavity 10 can be fully pumped out. The oil discharge pump plate 6 is provided with a plurality of oil discharge holes 61 in the radial direction, and discharged hot oil is collected in the oil collecting box 8, so that the collected hot oil can be conveniently and intensively discharged. Hot oil is discharged and then sent to a cooler for cooling, and cold oil is sent to the upper oil cavity 3, so that the circulating cooling effect is ensured.

An oil discharge channel 11 for communicating the upper oil cavity 3 with the lower oil cavity 10 is arranged in the region of the bearing pedestal 1 extending out of the upper oil cavity 3, and an oil outlet 31 communicated with the oil discharge channel 11 is arranged on the upper oil cavity 3. The oil in the upper oil chamber 3 is discharged into the oil discharge passage 11 through the oil outlet hole 31, and the oil enters the lower oil chamber 10 through the oil discharge passage 11 under the action of gravity. Thus, after the cold oil fully cools the bearing bush 4, the hot oil can be continuously discharged to the lower oil cavity 10 and then to the cooler.

The upper oil cavity 3 is connected with an oil inlet pipe 2, and the oil inlet pipe 2 is connected with a cooler. The oil cooled by the cooler is sent into the upper oil cavity 3 through the oil inlet pipe 2 to fully cool the bearing bush 4. An oil discharge pipe 9 is connected to the oil collection box 8, the other end of the oil discharge pipe 9 extends out of the lower oil cavity 10, and one end, extending out of the lower oil cavity 10, of the oil discharge pipe 9 is connected to the cooler. Hot oil in the oil collecting box 8 is intensively sent into the cooler for cooling through the oil discharging pipe 9, and then cold oil is sent into the upper oil cavity 3 by the oil cooler to realize circulation.

Furthermore, a floating sealing ring 7 is sleeved outside the oil discharge pump plate 6, the outer side of the floating sealing ring 7 is sleeved in the oil collecting box 8, and a through hole communicated with the oil discharge hole 61 is formed in the floating sealing ring 7. In order to avoid oil leakage of the cold and hot oil cavities, a floating sealing ring 7 is arranged to adapt to dynamic swing of the main shaft 5 during operation, and a good sealing effect is always kept.

Furthermore, the inner side of the oil discharge pump plate 6 is provided with a diversion trench which facilitates the lubricating oil to enter the oil discharge hole 61. When hot oil reaches the entrance of the oil discharge hole 61 of the oil discharge pump plate 6, the hot oil can more easily enter the oil discharge hole 61 under the guiding action of the arc-shaped guide groove, and the smooth oil absorption is ensured.

Further, the oil inlet pipe 2 extends to the gap between the adjacent bearing shells 4 and to the lower section area of the bearing shells 4, and the oil outlet hole 31 is located at the upper end of the upper oil chamber 3. The oil inlet pipe 2 sends cold oil into the lower section of the bearing bush 4, and the oil outlet hole 31 is arranged at the upper end of the upper oil cavity 3, so that the oil can be fully contacted with the bearing bush 4, and the bearing bush 4 is fully cooled.

The external diameter of the oil discharge pump plate 6 meets the oil discharge pressure of the oil discharge pump plate 6, the sum of pressure losses of a cooler and a pipeline is greater than the minimum required circulating oil amount, and the minimum oil discharge pressure of the oil discharge pump plate 6 is not lower than 10m oil pressure.

The floating seal ring 7 outside the oil drain pump plate 6 is made of copper alloy or other material having hardness not less than 50HB higher than that of the main shaft 5. The floating ring is provided with a plurality of oil holes according to the circulating oil quantity.

The utility model discloses simple structure, accommodation is extensive, can replace the oil pump to use at low rotational speed unit. In a high-altitude low-temperature power station, when an oil pump circulates, the viscosity of low-temperature oil is high, and the running noise and vibration of the oil pump are very large. The utility model discloses do not receive oil viscosity to influence, the oil temperature is few when low circulating oil mass, can improve lubricating oil temperature to bearing design temperature value rapidly, and the low noise of operation process is low vibrations.

The traditional elastic sealing element compensates errors caused by the swinging of the main shaft 5 by means of self elastic deformation, the pre-installation is compressed too much, larger friction force can be generated, and the sealing abrasion can be more serious. The compression amount is too small, the sealing compensation capability is poor, and the leakage is easy. Requiring frequent replacement. The utility model discloses a floating seal ring 7 can follow 5 movements of main shaft, adapts to 5 various swing ranges of main shaft, and sealed not produce wearing and tearing, life cycle is long, basically need not to change.

The present invention is not limited to the above-mentioned optional embodiments, and any other products in various forms can be obtained by anyone under the teaching of the present invention, and any changes in the shape or structure thereof, all the technical solutions falling within the scope of the present invention, are within the protection scope of the present invention.

Claims

1. A structure for improving the circulating cooling oil quantity of a self-lubricating guide bearing comprises an upper oil cavity (3) and a lower oil cavity (10) which are sleeved outside a main shaft (5), wherein the upper oil cavity (3) and the lower oil cavity (10) are both connected with a bearing seat (1), and a bearing bush (4) is positioned in the upper oil cavity (3); the method is characterized in that: be connected with oil extraction pump board (6) on main shaft (5), be provided with a plurality of oil extraction holes (61) on oil extraction pump board (6), the inboard and lower oil pocket (10) intercommunication of a plurality of oil extraction holes (61), it is connected with oil collecting box (8) to go up oil pocket (3), the outside and oil collecting box (8) intercommunication of a plurality of oil extraction holes (61), oil collecting box (8) cover is established outside oil extraction pump board (6), a plurality of oil extraction holes (61) and oil collecting box (8) intercommunication.

2. The structure for improving the amount of circulating cooling oil of the self-lubricating guide bearing according to claim 1, wherein: the oil extraction pump plate (6) is sleeved with a floating sealing ring (7), the outer side of the floating sealing ring (7) is sleeved in an oil collection box (8), and the floating sealing ring (7) is provided with a through hole communicated with an oil extraction hole (61).

3. The structure for increasing the amount of circulating cooling oil of the self-lubricating guide bearing according to claim 1, wherein: and a bearing bush supporting plate (41) for supporting a bearing bush (4) is fixed in the upper oil chamber (3).

4. The structure for improving the amount of circulating cooling oil of the self-lubricating guide bearing according to claim 1, wherein: the inner side of the oil discharge pump plate (6) is provided with a diversion trench which is convenient for lubricating oil to enter an oil discharge hole (61).

5. The structure for improving the amount of circulating cooling oil of the self-lubricating guide bearing according to claim 1, wherein: an oil discharge channel (11) for communicating the upper oil cavity (3) with the lower oil cavity (10) is arranged in the area of the bearing seat (1) extending out of the upper oil cavity (3), and an oil outlet (31) communicated with the oil discharge channel (11) is arranged on the upper oil cavity (3).

6. The structure for improving the amount of circulating cooling oil of the self-lubricating guide bearing according to claim 5, wherein: the upper oil cavity (3) is connected with an oil inlet pipe (2), and the oil inlet pipe (2) is connected with the cooler.

7. The structure for increasing the amount of circulating cooling oil of the self-lubricating guide bearing according to claim 6, wherein: the oil inlet pipe (2) extends to the gap between the adjacent bearing bushes (4) and extends to the lower section area of the bearing bushes (4), and the oil outlet hole (31) is located at the upper end of the upper oil cavity (3).

8. The structure for improving the amount of circulating cooling oil of the self-lubricating guide bearing according to any one of claims 1 to 7, wherein: an oil discharge pipe (9) is connected to the oil collection box (8), the other end of the oil discharge pipe (9) extends out of the lower oil cavity (10), and one end, extending out of the lower oil cavity (10), of the oil discharge pipe (9) is connected to the cooler.