CN201568457U - Improvement of oil-throwing preventing device for end cover in radial bearing of water turbine generator - Google Patents

Abstract

The utility model relates to the improvement of an oil-throwing preventing device for an end cover in a radial bearing of a water turbine generator, in particular to the improvement of the oil-throwing preventing device of the end cover of the radial bearing in the water turbine generator. An original bearing seat, a bearing cover and a bearing end cover blank continue to be used, which means that the installation size and the dimensional size of the bearing are not changed; on the above basis, the oil sealing by a woolen felt is canceled and the structures of an oil sealing ring and an oil throwing ring are adopted, so that a main shaft under the position of the end cover is separated form lubricating oil, thereby thoroughly preventing the lubricating oil from being thrown out along the main shaft. With simple structure, low renovating cost, easy implementation and convenient installation as well as maintenance, the utility model can be widely applied for various radial bearings.

Description

Improvement of the anti-spin oil device of the end cover in the radial bearing of the hydro-generator

technical field

The utility model relates to the improvement of a hydraulic generator, in particular to an oil throwing prevention device for a radial bearing end cover in a horizontal hydraulic generator.

Background technique

Radial bearings are often used in horizontal hydroelectric generators. As shown in Figure 2, radial bearings often use wool felt at the position of the end cover to seal oil and block dust from entering the inside of the bearing, and generally use two layers of wool felt as a seal. We have found that the seal works fairly well when the wool felt is not stained with lubricating oil. Once the wool felt is stained with lubricating oil and is in a wet state, because the unit is running and the main shaft is rotating, the rotating main shaft will jump more or less, which will squeeze the wool felt, and a part of the lubricating oil will flow out of the end cover along the main shaft. Throw it out, and another part of lubricating oil is thrown out into the end cover along the main shaft. As the speed of the unit increases, this oil throwing phenomenon becomes more and more obvious. Sometimes several liters of oil can be thrown out in a day. After the oil is thrown out, it will not only pollute the machine room, but also reduce the oil level in the bearing seat until it is lower than the normal working oil level, so that the unit cannot operate normally.

Contents of the invention

The purpose of this utility model is to solve the above problems, design a structure that can completely prevent the lubricating oil from being thrown out along the main shaft, borrow the original bearing seat, bearing cap, and bearing end cap blank, that is to say, the installation size and outer dimension of the bearing are not the same. In the case of change, by canceling the wool felt seal oil and using the oil seal ring and oil throwing ring structure, the main shaft under the position of the end cover is cut off from the lubricating oil so as to completely prevent the lubricating oil from being thrown out along the main shaft.

The utility model is realized in this way: the oil sealing plate and the oil sealing ring are fixed on the bearing end cover with bolts, the bearing end cover is fixed on the bearing cap with bolts, and the asbestos rubber oil sealing plate is used as the flat seal between the bolt and the bearing cover; The oil throwing ring assembly is fixed on the main shaft and rotates together with the main shaft; the oil throwing ring assembly includes the oil throwing ring, the bolts for reaming holes, nuts, washers, and asbestos rubber plates; Nuts, washers and asbestos rubber plates are fixed on the main shaft.

The utility model has the advantages of: 1. By canceling the oil seal of the wool felt in Figure 2, the structure of the oil seal ring and the oil throwing ring is used instead, so that the main shaft under the position of the end cover is cut off from the lubricating oil, thereby completely preventing the lubricating oil from being thrown out along the main shaft . 2. The utility model has a simple structure, and borrows the original bearing seat, bearing cover, and bearing end cover blank, that is to say, the installation size and external size of the bearing do not change, so the transformation cost is low, easy to implement, and easy to install and maintain. Widely used in various radial bearings.

Description of drawings

Figure 1 is an assembly drawing of the bearing after the improved anti-spin oil device of the bearing end cover.

Figure 2 is an assembly drawing of the original bearing of the anti-spin oil device of the bearing end cover before improvement.

Figure 3 is a schematic diagram of a new bearing end cover that replaces the original bearing end cover after improvement.

Figure 4 is an A-direction view of the improved new bearing end cover.

Figure 5 is a schematic diagram of the original bearing end cover.

Fig. 6 is a view from direction B of the original bearing end cover.

Figure 7 is a schematic diagram of the newly added oil sealing ring after improvement.

Fig. 8 is a schematic diagram of the newly added oil throwing ring after improvement.

Figure 9 is a C-direction view of the improved oil flinger

The part numbers are: 1-bolt; 2-oil seal plate; 3-new bearing cover; 4-oil seal ring; 5-asbestos rubber oil seal plate; 6-oil throwing ring assembly; 7-bolt; 8-bearing Cover; 9-wool felt; 10-original bearing end cover; 11-oil throwing ring; 12-reaming hole bolt; 13-nut; 14-washer; 15-asbestos rubber plate; 16-main shaft.

Detailed ways

As shown in Fig. 2, the original bearing assembly diagram of the unimproved bearing cover anti-spin oil device, the bearing cover 10 is installed on the bearing cover 8 with bolts 7, and the wool felt 9 is installed on the bearing cover 10 for sealing oil of the main shaft. When the unit is running, the main shaft rotates, and the lubricating oil moves toward the wool felt 9 along the direction indicated by the arrow and gradually soaks the wool felt. Due to the extrusion of the main shaft to the wool felt, part of the lubricating oil is thrown out of the end cover along the main shaft. The other part of lubricating oil is thrown out into the end cover along the main shaft. As the speed of the unit increases, this oil throwing phenomenon becomes more and more obvious. After the oil is thrown out, it will not only pollute the machine room, but also reduce the oil level in the bearing seat until it is lower than the normal working oil level, so that the unit cannot operate normally.

For this reason, we replaced the original bearing end cover 10 (as shown in Figure 5 and Figure 6) with a new bearing end cover 3 (as shown in Figure 3 and Figure 4), and changed the shape of the two ends of the original bearing seat (as shown in Figure 1) , increase the bolt 1, oil sealing plate 2, oil sealing ring 4, oil throwing ring assembly 6, and cancel the wool felt 9.

The utility model is realized in this way; the oil sealing plate 2 and the oil sealing ring 4 are fixed on the bearing end cover 3 with bolts 1, the bearing end cover 3 is fixed on the bearing cover 8 with bolts 7, and the asbestos rubber oil sealing plate 5 is used as The flat seal of the bolt 7 and the bearing cover 8; the oil throwing ring assembly 6 is fixed on the main shaft and rotates with the main shaft; the oil throwing ring assembly 6 includes the oil throwing ring 11, the hinged hole bolt 12, the nut 13, the washer 14, asbestos rubber Plate 15; Oil throwing ring 11 is a half structure, and is fixed on the main shaft 16 with reaming hole bolt 12, nut 13, washer 14, asbestos rubber plate 15.

As shown in Figure 1, when the unit is running, the main shaft rotates, and most of the lubricating oil is thrown back to the bearing chamber by the oil throwing ring assembly 6, and a very small amount of lubricating oil crosses the oil throwing ring assembly 6 in the direction indicated by the arrow, and then falls to the seal On the oil ring 4 outer wall, the lubricating oil dropped on the outer wall returns to the oil pool along the outer wall of the oil sealing ring, and the main shaft under the oil sealing ring position is completely cut off from the lubricating oil, so that the lubricating oil is completely prevented from being thrown out along the main shaft.

Claims (1)

1. the improvement of the anti-rejection oily device of end cap in the hydraulic turbine generator radial bearing, it is characterized in that: oil sealing plate (2) and oil seal ring (4) are fixed on the bearing (ball) cover (3) with bolt (1), bearing (ball) cover (3) is fixed on the bearing cap (8) with bolt (7), and asbestos rubber oil sealing plate (5) is as the plane sealing of bolt (7) and bearing cap (8); Disc assembling (6) is fixed on the main shaft rotates with main shaft; Disc assembling (6) comprises disc (11), articulation hole bolt (12), nut (13), packing ring (14), asbestos packing sheet (15) again; Disc (11) is fixed on (16) on the main shaft for dividing the half hitch structure with articulation hole bolt (12), nut (13), packing ring (14), asbestos packing sheet (15).

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