Vortex type combined cycle bearing bush lubricating and cooling device

Abstract

The utility model discloses a vortex type combined cycle bearing bush lubricating and cooling device which is integrally cylindrical and composed of an ejector, a reducing connecting pipe, a flange, a spray head A, a spray head B, a connecting bolt and a connecting nut. The utility model is suitable for a high-capacity high-water-head medium-high-rotating-speed impact type water-turbine generator set and is applied to a thrust bearing oil groove of the set, due to the structural characteristics of the set, the thrust bearing oil groove is narrow in space and numerous in parts, and mostly adopts a weak-flow outer circulation system without an additional pump, and the cooling effect of lubricating oil in the oil groove is not ideal. The temperature rise at the bearing bush is high, and the bush burning risk exists. The plug-in type direct injection principle is adopted, low-temperature lubricating oil can be directly injected to the matching position of the bearing bush and the rotating shaft, the cooling efficiency is greatly improved, and the operation risk of a unit is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of water turbine generators, in particular to a vortex type combined circulation bearing bush lubrication and cooling device suitable for large-capacity, high-head, medium- and high-speed impulse water turbine generator sets. Background Art

[0002] The bearing bush in the thrust bearing of the hydro-turbine generator set supports the weight of the entire rotating component and is one of the most important core components of the unit. When the unit is running, the bearing bush in the thrust bearing is generally lubricated and cooled by lubricating oil immersion cooling. The large-capacity, high-head, medium- and high-speed impact hydro-turbine generator set has the following structural characteristics: First, the space in the thrust bearing oil tank is small, there are many components, and the oil flow is not smooth; second, the space in the thrust bearing oil tank is small, and internal circulation cooling cannot be adopted. Most of them adopt a weak flow external circulation system such as a mirror plate pump and a bearing pump that is not an external pump. In addition, the oil flow is not smooth and the internal lubricating oil temperature is high; therefore, there is a problem that the cooling effect of the lubricating oil in the oil tank is not ideal and the temperature rise at the bearing bush is high. In extreme cases, it may lead to the risk of burning the bush, which brings great hidden dangers to the safe and stable operation of the unit. Summary of the invention

[0003] In view of this, the purpose of the utility model is to disclose a vortex combined cycle bearing bush lubrication and cooling device which adopts the principle of plug-in direct injection and can directly inject low-temperature lubricating oil into the fitting place between the bearing bush and the rotating shaft, thereby greatly improving the cooling efficiency and reducing the operation risk of the unit. The technical scheme of the utility model is as follows: it is composed of an injector, a reducer, a flange A, a nozzle A, a nozzle B, connecting bolts and connecting nuts as a whole. The injector is placed horizontally, and the right side is welded to the reducer, the right side of the reducer is welded to the flange A, the nozzle B is welded to the injector from top to bottom, the nozzle A is arranged symmetrically on the left and right, and is welded to the injector, and the flange A and the flange B are tightened with connecting bolts and connecting nuts.

[0004] In the above-mentioned vortex combined cycle bearing pad lubrication and cooling device, the nozzle A is a narrow-angle spray.

[0005] In the above-mentioned vortex combined cycle bearing pad lubrication and cooling device, the nozzle B is a wide-angle spray.

[0006] In the above-mentioned vortex combined cycle bearing pad lubrication and cooling device, the angle between the nozzle A and the nozzle B is 30° to 45°.

[0007] Compared with the prior art, the beneficial effects of the utility model are:

[0008] 1. Compared with the traditional method of heat exchange between cold and hot lubricating oils in the thrust oil tank, cooling the bearing bush after the overall temperature is reduced, this device can directly spray low-temperature lubricating oil to the joint between the bearing bush and the rotating shaft, which greatly improves the cooling efficiency and effectively solves the problem of abnormally high temperature of the bearing bush; at the same time, the viscosity of the low-temperature lubricating oil is better, which is more conducive to the formation of an oil film between the bearing bush and the rotating shaft. Directly spraying the low-temperature lubricating oil to the joint between the bearing bush and the rotating shaft can significantly reduce the probability of dry grinding and burning of the bearing bush and the rotating shaft, and improve the operating stability of the unit.

[0009] 2. The utility model has a simple structure, does not require complicated processes and installation methods, and is very convenient to install, disassemble and repair. At the same time, the structure is stable and can operate in an oil-immersed environment in a thrust bearing for a long time. It has the characteristics of low cost, high efficiency, low maintenance cost, and long effective life. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural schematic diagram of the utility model.

[0011] Figure 2 for Figure 1 A-direction view.

[0012] Figure 3 This is a schematic diagram of the use of the utility model.

[0013] Explanation of markings in the figure: 1-injector; 2-reducing pipe; 3-flange A; 4-nozzle A; 5-nozzle B; 6-connecting bolts; 7-connecting nuts; 8-flange B; 9-rotating shaft; 10-bearing bush A; 11-bearing bush B; 12-injection direction of nozzle A; 13-injection direction of nozzle B; 14-oil inlet pipe. DETAILED DESCRIPTION

[0014] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0015] 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.

[0016] like Figure 1 , Figure 2As shown, a vortex combined cycle bearing bush lubrication and cooling device is composed of an injector 1, a reducer 2, a flange A3, a nozzle A4, a nozzle B5, a connecting bolt 6, and a connecting nut 7 as a whole. The injector 1 is placed horizontally, and the right side is welded to the reducer 2, and the right side of the reducer 2 is welded to the flange A3. The nozzle B5 is welded to the injector 1 from top to bottom, and the nozzle A4 is arranged symmetrically and welded to the injector 1. The flange A3 and the flange B8 are tightened by the connecting bolts 6 and the connecting nuts 7. The nozzle A4 is a narrow-angle spray, and the nozzle B5 is a wide-angle spray. The angle between the nozzle A4 and the nozzle B5 is 30° to 45°. The device is connected to the oil inlet pipe 14, and the low-temperature lubricating oil is introduced, and it is sprayed out in a directional and constant pressure through the nozzles A4 and B5.

[0017] like Figure 3 As shown, the utility model is placed between the bearing bush A10 and the bearing bush B11, and the nozzle A4 can directly spray the low-temperature lubricating oil to the matching position between the bearing bush A10 and the rotating shaft 9, and the bearing bush B11 and the rotating shaft 9, which plays a direct cooling and lubricating role; the nozzle B5 can directly and evenly spray the low-temperature lubricating oil onto the rotating shaft 9 over a large area, thereby enhancing the cooling and lubricating effects.

[0018] 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 vortex combined cycle bearing pad lubrication and cooling device, characterized by: The whole is composed of an injector (1), a reducer (2), a flange A (3), a nozzle A (4), a nozzle B (5), a connecting bolt (6), and a connecting nut (7). The injector (1) is placed horizontally, and the right side is welded to the reducer (2). The right side of the reducer (2) is welded to the flange A (3). The nozzle B (5) is welded to the injector (1) from top to bottom. The nozzle A (4) is arranged symmetrically on the left and right and welded to the injector (1). The flange A (3) and the flange B (8) are tightened by the connecting bolt (6) and the connecting nut (7).

2. The eddy current combined cycle bearing pad lubrication and cooling device according to claim 1 is characterized by: The nozzle A (4) is a narrow-angle spray.

3. The eddy current combined cycle bearing pad lubrication and cooling device according to claim 1 is characterized by: The nozzle B (5) is a wide-angle spray.

4. The eddy current combined cycle bearing pad lubrication and cooling device according to claim 1 is characterized by: The included angle between the nozzle A (4) and the nozzle B (5) is 30° to 45°.

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