Oil mist blocking device for combined cycle cooling system of hydro-generator

Abstract

The utility model discloses an oil mist blocking device for a combined cycle cooling system of a hydro-generator, which is integrally formed by an eddy current blocking ring, a fixing bolt A, a sealing ruler and a fixing bolt B. The oil mist blocking device is suitable for a high-capacity high-water-head medium-and-high-rotating-speed impact type hydro-generator set and is applied to a thrust bearing oil groove of the set. Due to the structural characteristics of the unit, the bearing bushes in the oil grooves of the thrust bearings are lubricated and cooled in a low-temperature lubricating oil direct injection mode, the rising effect of oil mist is larger, and the situation that the oil mist overflows out of the upper covers of the oil grooves is more likely to occur. By adopting the principle of gap blocking and path blocking, oil mist rising can be effectively blocked in the thrust bearing oil groove, the kinetic energy of oil mist particles is reduced, and the oil mist is prevented from overflowing.

Description

Technical Field

[0001] The utility model relates to the technical field of water turbine generators, in particular to an oil mist blocking device for a combined circulation cooling system of a water turbine generator, which is suitable for a large-capacity, high-water-head, medium- and high-speed impulse water turbine generator set. 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. Due to its structural characteristics, the large-capacity, high-head, medium- and high-speed impact hydro-turbine generator set uses low-temperature lubricating oil directly sprayed onto the joint between the bearing bush and the shaft to lubricate and cool the bearing bush. This method has excellent cooling and lubrication effects and can greatly reduce the operating temperature of the bearing bush. However, due to the torrent effect during the injection, a large amount of oil mist will be generated and rise during the operation of the unit. If it is not controlled, a large amount of oil mist will overflow the thrust oil tank and pollute the operating area, posing a great risk 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 an oil mist blocking device for a combined circulation cooling system of a turbine generator, which adopts the principle of gap blocking and path blocking, can effectively block the rising of oil mist in the thrust bearing oil groove, reduce the kinetic energy of oil mist particles, and prevent oil mist from overflowing. The technical scheme of the utility model is: it is composed of an eddy current blocking ring, a fixing bolt A, a closing ruler, and a fixing bolt B to form a whole. The right side of the eddy current blocking ring is tightened with the partition by the fixing bolt A, and the closing ruler is tightened with the eddy current blocking ring from top to bottom by the fixing bolt B. The eddy current blocking ring is a closed circular ring and is made of aluminum alloy.

[0004] In the above-mentioned oil mist blocking device of the combined cycle cooling system of the hydro-generator, the oil-proof groove A is E-shaped, presenting three convex and two concave shapes.

[0005] In the above-mentioned oil mist blocking device of the combined cycle cooling system of the hydro-generator, the oil-proof groove B is E-shaped, presenting three convex and two concave shapes.

[0006] In the above-mentioned oil mist blocking device of the combined cycle cooling system of the hydro-generator, the oil separator is in a polygonal sawtooth shape.

[0007] In the above-mentioned oil mist blocking device of the combined cycle cooling system of the hydro-generator, the vortex blocking ring and the rotating shaft are matched with a small gap.

[0008] In the above-mentioned oil mist blocking device of the combined cycle cooling system of the hydro-generator, the sealing ruler and the rotating shaft are matched with a small gap.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] 1. The oil-proof grooves A and B arranged below the vortex blocking ring can effectively increase the path length of the oil mist particles rising and reduce the amount of oil mist particles overflowing; at the same time, the oil barrier adopts a multi-angle serrated shape, which can greatly increase the kinetic energy loss of the oil mist particles when rising upward, thereby reducing the amount of oil mist overflowing.

[0011] 2. There is a small gap between the closed ruler and the rotating shaft, which reduces the airflow path in the gap and increases the pressure. Since there is wind when the rotating shaft rotates, the small gap between the closed ruler and the rotating shaft generates reverse air pressure that prevents the oil mist from continuing to rise to the oil tank cover, further reducing the amount of oil mist overflow.

[0012] 3. The utility model has a simple and stable structure, is easy to install and disassemble, can operate in an oil-immersed environment in a thrust bearing for a long time, and has the characteristics of low cost, long service life and good stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The utility model relates to an oil mist blocking device for a combined cycle cooling system of a hydro-generator.

[0014] Figure 2 It is a structure to prevent oil mist from overflowing in a traditional oil tank.

[0015] Explanation of the markings in the figure: 1- eddy current blocking ring; 2- fixing bolt A; 3- closing ruler; 4- fixing bolt B; 5- oil-proof groove A; 6- oil-proof groove B; 7- rotating shaft; 8- oil groove upper cover; 9- partition; 10- bearing bush; 11- oil inlet pipe; 12- oil sealing plate; 13- rotating shaft outer profile; 14- rotating shaft upper profile; 16- oil separator. 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 1As shown, an oil mist blocking device for a combined cycle cooling system of a hydro-generator is integrally formed by a vortex blocking ring 1, a fixing bolt A2, a closing ruler 3, and a fixing bolt B4. The right side of the vortex blocking ring 1 is tightened with the partition 9 by the fixing bolt A2, and the closing ruler 3 is tightened with the vortex blocking ring 1 from top to bottom by the fixing bolt B4. The vortex blocking ring 1 is a closed circular ring made of aluminum alloy, and an oil-proof groove A5, an oil-proof fence 16, and an oil-proof groove B6 are sequentially arranged at the lower part. The closing ruler 3 is annular as a whole, with an L-shaped cross section and made of aluminum alloy. The oil-proof groove A5 is E-shaped, with three convex and two concave shapes. The oil-proof groove B6 is E-shaped, with three convex and two concave shapes. The oil-proof fence 16 is a polygonal serrated shape. The vortex blocking ring 1 and the rotating shaft 7 are matched with a small gap, and the closing ruler 3 and the rotating shaft 7 are matched with a small gap. The oil-proof groove A5 and the oil-proof groove B6 arranged below the vortex blocking ring 1 can effectively increase the path length of the oil mist particles rising and reduce the amount of oil mist particles overflowing; at the same time, the oil-isolating grille 16 adopts a polygonal serration shape, which can greatly increase the kinetic energy loss of the oil mist particles when rising upward, thereby reducing the amount of oil mist overflowing; there is a small gap between the closing ruler 3 and the rotating shaft 7, so that the air flow path in the gap is reduced and the pressure becomes larger. Since there is wind throwing when the rotating shaft 7 rotates, the small gap between the closing ruler 3 and the rotating shaft 7 generates a reverse air pressure that prevents the oil mist from continuing to rise to the oil tank cover 8, further reducing the amount of oil mist overflowing.

[0019] like Figure 2 As shown, the conventional structure simply sets an oil sealing plate 12 above the thrust washer 10 and the oil inlet pipe 11. Although it can block the splashing of some lubricating oil particles, it cannot prevent the rising of fine oil mist particles, and the effect of preventing oil mist from overflowing is poor.

[0020] 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. An oil mist blocking device for a combined cycle cooling system of a hydro-generator, characterized by: The device is composed of an eddy current blocking ring (1), a fixing bolt A (2), a closing ruler (3), and a fixing bolt B (4). The right side of the eddy current blocking ring (1) is fastened to the partition (9) by the fixing bolt A (2). The closing ruler (3) is fastened to the eddy current blocking ring (1) from top to bottom by the fixing bolt B (4). The eddy current blocking ring (1) is in the shape of a closed circular ring and is made of aluminum alloy. An oil-proof groove A (5), an oil-proof grille (16), and an oil-proof groove B (6) are arranged in sequence at the bottom. The closing ruler (3) is in the shape of a circular ring as a whole and has an L-shaped cross section and is made of aluminum alloy.

2. The oil mist blocking device of a combined cycle cooling system of a hydro-generator according to claim 1 is characterized in that: The oil-proof groove A (5) is in an E-shape, presenting three convex and two concave portions.

3. The oil mist blocking device of a combined cycle cooling system of a hydro-generator according to claim 1 is characterized in that: The oil-proof groove B (6) is E-shaped, presenting three convex and two concave portions.

4. The oil mist blocking device of a combined cycle cooling system of a hydro-generator according to claim 1 is characterized in that: The oil separation fence (16) is in a polygonal sawtooth shape.

5. The oil mist blocking device of a combined cycle cooling system of a hydro-generator according to claim 1 is characterized in that: The eddy current blocking ring (1) and the rotating shaft (7) are matched with each other with a small clearance.

6. The oil mist blocking device of a combined cycle cooling system of a hydro-generator according to claim 1 is characterized by: The closed ruler (3) and the rotating shaft (7) are matched with each other with a small clearance.

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