Guide cover plate of cooler in guide bearing oil groove of hydro-generator

Abstract

The utility model discloses a guide cover plate of a cooler in a guide bearing oil groove of a hydro-generator, which is integrally formed by a vortex guide plate, a fixing bolt A, a fixing bolt B, a flexible sealing ring and a fixing bolt C. The guide cover plate is suitable for a high-capacity high-water-head medium-high-rotating-speed impact type hydro-generator set and is applied to the guide bearing oil groove of the set. Due to the structural characteristics of the unit, the inner axial direction of a guide bearing oil groove is high, the oil groove is deep, and the situation that lubricating oil flows below a guide shoe supporting plate directly and inefficiently circulates without passing through a cooler is prone to occurring, so that the cooling efficiency of the lubricating oil is reduced, and hidden danger is brought to operation of the unit. A space closed forced circulation principle is adopted, a rigid path is formed in the guide bearing oil groove, lubricating oil is forced to completely pass through the area where the cooler is located, and cooling efficiency is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of water turbine generators, in particular to a guide cover plate for a cooler in an oil groove of a guide bearing of a water turbine generator. Background Art

[0002] The bearing bush in the guide bearing of the hydro-turbine generator set provides radial constraint force for the shaft, reduces the swing of the shaft, and improves the rotational stability of the shaft. It is one of the most important core components of the unit. Due to its structural characteristics, the large-capacity, high-head, medium- and high-speed impulse hydro-turbine generator set has a higher axial direction and a deeper oil groove in the guide bearing. The distance between the cooler in the oil groove and the guide bearing support plate is large. When the unit is running, the lubricating oil follows the characteristics of the fluid and avoids the direction of large resistance and flows to the direction of small resistance. This makes it easy for the lubricating oil to flow without passing through the cooler and circulate inefficiently directly under the guide bearing support plate, which will reduce the cooling efficiency of the lubricating oil and bring hidden dangers to the operation of the unit. Summary of the invention

[0003] In view of this, the purpose of the utility model is to disclose a guide cover plate for the cooler in the guide bearing oil groove of a hydro-turbine generator, which adopts the principle of space-enclosed forced circulation, forms a rigid path in the guide bearing oil groove, forces the lubricating oil flow to pass through the area where the cooler is located, and effectively improves the cooling efficiency. The technical scheme of the utility model is: it is composed of a vortex guide plate, a fixing bolt A, a fixing bolt B, a flexible sealing ring, and a fixing bolt C as a whole. The vortex guide plate is tightened with the cooler from top to bottom by fixing bolts A and fixing bolts B, and the flexible sealing ring is tightened with the vortex guide plate by fixing bolts C. The vortex guide plate is composed of an annular cover plate and a sealing ring plate as a whole. The annular cover plate is placed horizontally, and the sealing ring plate is welded to the annular cover plate from top to bottom. The sealing ring plate is in the shape of a circular wall and has a vertical rectangular cross section; the annular cover plate is in the shape of a circular ring and has an L-shaped cross section, and a baffle strip is provided on the outer ring.

[0004] In the above-mentioned guide cover plate of the cooler in the oil groove of the guide bearing of the hydro-turbine generator, the flexible sealing ring is made of oil-resistant and highly elastic rubber material.

[0005] Furthermore, the flexible sealing ring is in the shape of a bell-mouth circular ring.

[0006] Furthermore, the diameter of the upper port of the flexible sealing ring is greater than the diameter of the lower port.

[0007] In the above-mentioned guide cover plate of the cooler in the oil groove of the guide bearing of the hydro-turbine generator, the flexible sealing ring and the guide shoe support plate are in contact fit without any gap.

[0008] Compared with the prior art, the beneficial effects of the utility model are:

[0009] 1. After the utility model is installed, the low resistance area between the guide plate and the cooler is firstly closed, so that no passage is formed in this area, forcing the lubricating oil to no longer flow to this area, but to flow to the cooler position instead; at the same time, the utility model closes the area on the right side of the upper 2 / 3 of the cooler from top to bottom, which forces all the lubricating oil to enter the cooler from the upper left of the cooler. By optimizing and constructing a rigid flow path, the effective contact time and area between the lubricating oil and the cooler are maximized, thereby greatly improving the cooling efficiency.

[0010] 2. The utility model is installed as a whole on the cooler, firmly grasps the cooler, has strong stability, and can operate in the oil-immersed environment in the oil tank for a long time; at the same time, the utility model has a simple structure, clear mechanism and function, and a long continuous operation life; in addition, the utility model is easy to install and disassemble, and the inspection and maintenance cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the utility model.

[0012] Figure 2 Detailed view of the vortex guide plate.

[0013] Figure 3 This is a schematic diagram of the use of the utility model.

[0014] Figure 4 This is a schematic diagram of the traditional structure.

[0015] Explanation of the markings in the figure: 1- vortex guide plate; 2- fixing bolt A; 3- fixing bolt B; 4- flexible sealing ring; 5- fixing bolt C; 6- cooler; 7- guide pad support plate; 9- lubricating oil flow; 10- guide bearing oil groove; 11- sealing ring plate; 12- annular cover plate; 13- baffle strip; 14- upper port; 15- lower port. DETAILED DESCRIPTION

[0016] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0017] It should be clarified that in the description of the present invention, terms indicating positional relationships or orientations such as "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside" and "outside" are based on the positional relationships or orientations shown in the drawings, and are intended to facilitate the understanding of the present invention, rather than indicating or implying that the referred to components must have a specific orientation or position, and be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0018] like Figure 1 , Figure 2As shown, a guide cover plate of a cooler in an oil groove of a guide bearing of a hydro-turbine generator is integrally formed by a vortex guide plate 1, a fixing bolt A2, a fixing bolt B3, a flexible sealing ring 4, and a fixing bolt C5. The vortex guide plate 1 is tightened with the cooler 6 from top to bottom by fixing bolts A2 and fixing bolts B3, and the flexible sealing ring 4 is tightened with the vortex guide plate 1 by fixing bolts C5. The vortex guide plate 1 is integrally formed by an annular cover plate 12 and a sealing ring plate 11. The annular cover plate 12 is placed horizontally, and the sealing ring plate 11 is welded with the annular cover plate 12 from top to bottom. The sealing ring plate 11 is in the form of a circular wall, and the cross section is a vertical rectangular; the annular cover plate 12 is in the form of a circular ring, and the cross section is L-shaped, and the outer ring has a baffle strip 13. The flexible sealing ring 4 is made of oil-resistant high-elastic rubber material, a bell-mouth circular ring, and the diameter of the upper port 14 is larger than the diameter of the lower port 15, and has a certain elastic force. The flexible sealing ring 4 is in contact with the guide shoe support plate 7 without a gap.

[0019] like Figure 3 As shown, after the use of the utility model, the low resistance area between the guide plate 7 and the cooler 6 is first closed, so that the area no longer forms a passage, forcing the lubricating oil flow 9 to no longer flow to the area, but to flow to the position of the cooler 6; at the same time, the utility model closes the area on the right side of the upper 2 / 3 of the cooler 6 from top to bottom, which forces all the lubricating oil flow 9 to enter the cooler 6 from the upper left of the cooler 6. By optimizing and constructing a rigid flow path, the effective contact time and area of ​​the lubricating oil flow 9 and the cooler 6 are maximized, thereby greatly improving the cooling efficiency.

[0020] like Figure 4 As shown, in the conventional structure, since the fluid follows the rule of avoiding high places and going to low places, a large amount of lubricating oil flow 9 flows through the area between the guide plate 7 and the cooler 6 instead of flowing into the cooler 6, resulting in reduced cooling efficiency.

[0021] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A guide cover plate for a cooler in an oil tank of a guide bearing of a hydro-turbine generator, characterized by: The vortex guide plate (1) is integrally formed by a vortex guide plate (1), a fixing bolt A (2), a fixing bolt B (3), a flexible sealing ring (4), and a fixing bolt C (5). The vortex guide plate (1) is fastened to the cooler (6) from top to bottom by the fixing bolt A (2) and the fixing bolt B (3). The flexible sealing ring (4) is fastened to the vortex guide plate (1) by the fixing bolt C (5). The vortex guide plate (1) is integrally formed by an annular cover plate (12) and a sealing ring plate (11). The annular cover plate (12) is placed horizontally. The sealing ring plate (11) is welded to the annular cover plate (12) from top to bottom. The sealing ring plate (11) is in the shape of a circular wall and has a vertical rectangular cross section. The annular cover plate (12) is in the shape of a circular ring and has an L-shaped cross section. The outer ring is provided with a baffle strip (13).

2. The guide cover plate of the cooler in the oil groove of the guide bearing of the hydro-turbine generator according to claim 1 is characterized by: The flexible sealing ring (4) is made of oil-resistant high-elastic rubber material.

3. The guide cover plate of the cooler in the oil groove of the guide bearing of the hydro-turbine generator according to claim 2 is characterized by: The flexible sealing ring (4) is in the shape of a bell-mouth circular ring.

4. The guide cover plate of the cooler in the oil groove of the guide bearing of the hydro-turbine generator according to claim 2 is characterized by: The diameter of the upper port (14) of the flexible sealing ring (4) is greater than the diameter of the lower port (15).

5. The guide cover plate of the cooler in the oil groove of the guide bearing of the hydro-turbine generator according to claim 1, characterized in that: The flexible sealing ring (4) and the guide shoe support plate (7) are in contact with each other without any gap.

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