CN212717650U

CN212717650U - Oil retaining structure of water guide bearing

Info

Publication number: CN212717650U
Application number: CN202021484087.1U
Authority: CN
Inventors: 王铭辉; 朱红波; 周大鹏; 江雄; 邓思波
Original assignee: Sichuan Huaneng Kangding Hydropower Co Ltd
Current assignee: Sichuan Huaneng Kangding Hydropower Co Ltd
Priority date: 2020-07-24
Filing date: 2020-07-24
Publication date: 2021-03-16
Anticipated expiration: 2030-07-24

Abstract

The utility model discloses an oil blocking structure for a water guide bearing, which relates to the field of water guide bearings, comprising a main shaft, a labyrinth ring, a bearing bush and a rotating oil basin. On the top cover bracket of the guide bearing, a rotating gap is formed between the inner side wall of the upper end of the rotating oil basin and the outer side wall of the bearing bush through a labyrinth ring, and an oil baffle ring is fixed under the labyrinth ring; a stop is welded under the labyrinth ring of the rotating oil basin The oil ring becomes an oil blocking barrel, thereby reducing the amount of turbine oil thrown from the labyrinth ring when the unit is running. The flared nozzle is perpendicular to the tangential direction of the bearing bush, thereby improving the pump oil volume and accelerating the cooling and heat exchange speed of the turbine oil.

Description

Oil blocking structure of water guide bearing

Technical Field

The utility model relates to a water guide bearing field especially relates to a water guide bearing's fender oil structure.

Background

The two-station hydroelectric generating set operates safely for a long time, but the phenomena of turbine oil throwing out of an oil basin and oil level reduction exist when the water guide bearing operates all the time, and the thrown oil enters a leakage water collecting well through the self-flowing drainage of the two-station hydroelectric generating set. In severe cases, each unit needs to supplement 20 liters of oil to the water guide every month. The oil throwing can cause great harm to equipment: firstly, the lubricating and cooling effects of the bearing are poor, the temperature of the bearing is easily increased, and the safe and stable operation of the unit is endangered; secondly, the oil consumption of the unit is increased, the thrown oil pollutes equipment and water quality, the service life of the equipment in the waterwheel room is influenced, the ecological environment is destroyed, the environment is not protected, and the workload of cleaning oil stains of the seepage water collecting well is increased; and thirdly, the oil level and the bearing temperature must be monitored constantly, and oil is added in time, so that the labor intensity of maintenance, maintenance and operation operators on duty is increased.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problem that the oil retaining structure of the water guide bearing is designed.

The utility model discloses a following technical scheme realizes above-mentioned purpose:

the oil retaining structure of the water guide bearing comprises a main shaft, a labyrinth ring, a bearing bush and a rotary oil basin, wherein the lower end of the rotary oil basin is fixedly arranged on the side wall of the main shaft, the bearing bush is fixedly arranged on a top cover support of the water guide bearing, a rotary gap is formed between the inner side wall of the upper end of the rotary oil basin and the outer side wall of the bearing bush through the labyrinth ring, and the oil retaining ring is fixedly arranged below the labyrinth ring.

Further, the height of the slinger ranges from 70 to 100 mm.

Furthermore, a pipe orifice of the pitot tube in the water guide bearing, which is positioned in the rotating oil basin, is a horn-shaped pipe orifice.

Furthermore, the trumpet-shaped pipe orifice of the pitot tube is perpendicular to the tangential direction of the bearing bush.

The beneficial effects of the utility model reside in that: through rotating an oil pan labyrinth ring below welding oil scraper ring, make it become the oil blocking bucket to turbine oil gets rid of the volume of output from labyrinth ring department when reducing the unit operation, the effectual oil that gets rid of that has reduced is to the harm that machinery caused, changes into the horn type mouth of pipe through the orificial structure that is located rotation oil pan with the pitot tube, and the horn type mouth of pipe of pitot tube is perpendicular with the tangential direction of axle bush simultaneously, thereby improves the pump oil mass, with higher speed turbine oil cold heat exchange speed.

Drawings

FIG. 1 is a schematic structural view of an oil retaining structure of a water guide bearing according to the present invention;

wherein corresponding reference numerals are:

1-main shaft, 2-bearing bush, 3-oil retainer ring, 4-rotating oil basin and 5-pitot tube.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. 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: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "inner", "outer", "left", "right", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or orientations or positional relationships that are conventionally placed when the products of the present invention are used, or orientations or positional relationships that are conventionally understood by those skilled in the art, and are merely for convenience of description of the present invention and simplifying the description, but do not indicate or imply that the device or element that is referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be further noted that, unless explicitly stated or limited otherwise, the terms "disposed" and "connected" are to be interpreted broadly, and for example, "connected" may be a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; the connection may be direct or indirect via an intermediate medium, and may be a communication between the two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The following describes in detail embodiments of the present invention with reference to the accompanying drawings.

As shown in fig. 1, the oil blocking structure of the water guide bearing comprises a main shaft 1 and a labyrinth ring, bearing bush 2 and rotation oil basin 4, the lower extreme fixed mounting of rotation oil basin 4 is on the lateral wall of main shaft 1, bearing bush 2 fixed mounting is on water guide bearing's top cap support, form the rotating clearance through the labyrinth ring between the upper end inside wall of rotation oil basin 4 and the lateral wall of bearing bush 2, labyrinth ring below is fixed and is provided with oil scraper ring 3, oil scraper ring 3's minimum height is less than the inboard highest height of rotation oil basin 4, oil scraper ring 3's high range is 70-100mm, oil scraper ring 3 welds and adopts the section welding mode to prevent that a large amount of welding from making rotation oil basin 4 and oil scraper ring 3 take place to warp, bearing bush 2 restricts its amplitude of swing when main shaft 1 is rotatory, the inboard upper end of rotation oil basin 4 forms the rotating clearance with the lateral wall of bearing bush 2, prevent turbine oil through the labyrinth ring and throw away.

The pipe orifice of the pitot tube 5 in the water guide bearing, which is positioned in the rotating oil basin 4, is a horn-shaped pipe orifice.

The trumpet-shaped pipe orifice of the pitot tube 5 is vertical to the tangential direction of the bearing bush 2.

The utility model discloses water guide bearing's fender oil structure's theory of operation as follows:

an oil retainer ring 3 is welded below a labyrinth ring of a rotating oil basin 4 to form an oil retainer barrel, so that the situation that a large amount of turbine oil rotates in the rotating oil basin 4 to form rotating turbulent flow and oil mist overflows from the labyrinth ring due to the fact that the turbine oil in the rotating oil basin 4 needs to be pumped to an external cooler through a pitot tube 5 when a unit runs and the oil amount on the pitot tube 5 is insufficient is avoided; therefore, the amount of turbine oil thrown out from the labyrinth ring when the unit operates is reduced, the oil consumption of the unit is reduced, meanwhile, the condition that the thrown oil causes pollution to equipment and water quality, the service life of equipment in a waterwheel room is influenced, the ecological environment is damaged, and the environmental protection problem is caused is avoided, the workload of oil stain cleaning of a seepage water collecting well is effectively reduced, the oil level and the temperature of a bearing do not need to be monitored constantly, and the labor intensity of operators on duty is obviously reduced; the structure that is located the orificial structure of rotation oil basin 4 through with pitot tube 5 changes into the horn type mouth of pipe, and the horn type mouth of pipe of pitot tube 5 is perpendicular with the tangential direction of axle bush 2 simultaneously to improve the pump oil mass, accelerate turbine oil cold heat exchange speed, avoided because of bearing lubrication and cooling effect are not good, cause the bearing temperature to rise, thereby endanger the condition of the safe and stable operation of unit.

The technical scheme of the utility model is not limited to the restriction of above-mentioned specific embodiment, all according to the utility model discloses a technical scheme makes technical deformation, all falls into within the protection scope of the utility model.

Claims

1. Oil blocking structure of water guide bearing, its characterized in that: the oil guide bearing comprises a main shaft, a bearing bush and a rotating oil basin, wherein the lower end of the rotating oil basin is fixedly arranged on the side wall of the main shaft, the bearing bush is fixedly arranged on a top cover support of a water guide bearing, a rotating gap is formed between the inner side wall of the upper end of the rotating oil basin and the outer side wall of the bearing bush through a labyrinth ring, and an oil retainer ring is fixedly arranged below the labyrinth ring.

2. The oil baffle structure of the water guide bearing according to claim 1, wherein: the height of the oil slinger ranges from 70 mm to 100 mm.

3. The oil deflector structure of a water guide bearing according to claim 1 or 2, wherein: the pipe orifice of the pitot tube in the water guide bearing positioned in the rotating oil basin is a horn-shaped pipe orifice.

4. The oil baffle structure of the water guide bearing according to claim 3, wherein: the trumpet-shaped pipe orifice of the pitot tube is vertical to the tangential direction of the bearing bush.