Oil mist collecting device of hydraulic generator

Abstract

The utility model provides a hydro-generator oil mist collecting device. The hydro-generator oil mist collecting device comprises an inner barrel and an outer cover. The outer cover comprises a cover body and a top cover; a conical head is arranged at the upper end of the inner cylinder, a plurality of air passing holes are formed in the side wall of the conical head, an in-cylinder oil filtering piece is installed in the inner cylinder, and a plurality of adsorption rods are arranged at the lower end of the top cover; the cover body comprises a bottom and a side part, a connecting part combined with the inner cylinder is arranged at one end, facing the inner cylinder, of the bottom, an oil return hole is formed in the connecting part, and a via hole corresponding to the oil return hole is formed in the inner cylinder; and a plurality of exhaust holes are formed in the side part. The oil mist filtering device is reasonable in structural design, in the process that oil mist is exhausted outwards through the inner barrel, oil drop particles can be captured to the maximum extent when passing through the oil filtering piece in the barrel, the adsorption rod and the oil filtering piece at the exhaust end, particularly in the scheme that a circulating cooling pipe is arranged, the oil drop particles can be better captured, gas exhausted from the exhaust hole is more environmentally friendly, oil drops flow back, and the oil mist filtering effect is improved. Excessive oil loss is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of power generation equipment, and in particular relates to an oil mist collection device for a water turbine generator. Background Art

[0002] The oil tank of the bearing of the hydro-turbine generator set will have oil throwing and oil mist overflow during operation. A large amount of oil mist diffuses inside the generator, posing many safety hazards. For example, the oil mist adhesion layer forms on the insulation layer of the stator and rotor, causing corrosion, which reduces the insulation performance and causes the stator and rotor coils of the generator to short-circuit or breakdown. The oil mist adheres to the dust and accumulates in the ventilation groove of the stator core and the ventilation groove of the rotor pole, causing the ventilation and heat dissipation of the generator to deteriorate, affecting the heat dissipation effect of the generator. It will combine with the carbon brush powder in the slip ring chamber to form oil stains, which adhere to the brush holder and the collector ring bracket, causing a ground short circuit. In addition, after the oil mist overflows the air vents of the bearing, it will also pollute the surface of the equipment and the surrounding environment. Long-term oil mist overflow will cause waste of oil and pollution, increasing the operating cost and maintenance workload of the unit. Therefore, how to reduce the impact of oil mist and reduce the pollution of oil mist has always been a technical problem that needs to be solved urgently. Summary of the invention

[0003] In view of this, the present invention aims to overcome the defects in the prior art and proposes an oil mist collection device for a hydro-generator.

[0004] To achieve the above object, the technical solution created by the present invention is implemented as follows:

[0005] A hydro-turbine generator oil mist collection device comprises an inner cylinder and an outer cover; the outer cover comprises a cover body mounted on the inner cylinder and a top cover detachably mounted on the cover body; a conical head is provided at the upper end of the inner cylinder, the top end of the conical head is fitted to the lower surface of the top cover, a plurality of air holes are provided on the side wall of the conical head, and an inner cylinder oil filter is installed in the inner cylinder, the inner cylinder oil filter is at a position lower than the air holes, a plurality of adsorption rods are provided at the lower end of the top cover, and the lower ends of the adsorption rods are all lower than the air holes; the cover body comprises a bottom and a side portion, a connecting portion combined with the inner cylinder is provided at one end of the bottom facing the inner cylinder, an oil drop groove is formed between the connecting portion and the side portion, an oil return hole connected to the oil drop groove is provided on the connecting portion, a through hole is provided on the inner cylinder corresponding to the oil return hole, and the position of the through hole is lower than the inner cylinder oil filter; a plurality of exhaust holes are provided on the side portion.

[0006] Furthermore, each adsorption rod includes two forms: a long rod and a short rod, and the long rod and the short rod are arranged in sequence at intervals or irregularly.

[0007] Furthermore, the inner cylinder oil filter comprises a filter screen covering the inner cross section of the inner cylinder.

[0008] Furthermore, the oil return hole is arranged obliquely, with its lower end facing the interior of the inner cylinder.

[0009] Furthermore, the exhaust hole is arranged obliquely, with its lower end facing the inside of the cover body.

[0010] Furthermore, a lower flange is provided at the upper end of the side of the cover body, and an upper flange is provided at the lower end of the top cover, and the upper and lower flanges are fixed by bolts.

[0011] Furthermore, a sealing gasket is provided between the upper flange and the lower flange.

[0012] Furthermore, the connection portion of the cover body is fixed to the inner tube by welding.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] The invention has a reasonable structural design. When the oil mist is discharged outward through the inner cylinder, the oil droplet particles can be captured to the maximum extent when passing through the oil filter, the adsorption rod and the exhaust end oil filter in the cylinder. Especially in the scheme with a circulating cooling pipe, it is more conducive to capturing the oil droplet particles, making the gas discharged from the exhaust hole more environmentally friendly, and the oil droplets reflux to avoid excessive loss of oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings constituting part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0016] Figure 1 A schematic diagram of the structure created by the present invention;

[0017] Figure 2 A schematic diagram of the outer cover portion in the invention;

[0018] Figure 3 It is a schematic diagram of the inner cylinder part in the invention;

[0019] Figure 4 This is a schematic diagram of an embodiment of the present invention when an exhaust end oil filter is provided;

[0020] Figure 5 It is a schematic diagram of a circulating cold water pipe provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0021] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0023] In the description of the invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the invention can be understood according to specific circumstances.

[0024] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0025] A hydraulic generator oil mist collection device, such as Figures 1 to 5 As shown, it includes an inner cylinder 1 and an outer cover 2, and an air cavity is formed between the outer cover and the inner cylinder; the outer cover includes a cover body 3 which is mounted on the inner cylinder and a top cover 4 which is detachably mounted on the cover body; a conical head 5 is provided at the upper end of the inner cylinder, the top of the conical head is fitted to the lower surface of the top cover, a plurality of air holes 6 are provided on the side wall of the conical head, and an inner cylinder oil filter 7 is installed in the inner cylinder, the inner cylinder oil filter is located at a position lower than the air holes, a plurality of adsorption rods 8 are provided at the lower end of the top cover, and the lower ends of the adsorption rods are all lower than the air holes. When the device is in use, the lower end of the inner cylinder is directly mounted on the air hole of the bearing oil tank bearing cover, and the oil mist overflowing from the cylinder air hole will be adsorbed and refluxed by the device, thereby reducing pollution and reducing oil loss.

[0026] The cover body includes a bottom 9 and a side 10. The bottom is provided with a connecting part 11 that is combined with the inner cylinder at one end facing the inner cylinder. An oil drop groove 12 is formed between the connecting part and the side. An oil return hole 13 connected to the oil drop groove is provided on the connecting part. A through hole 14 is provided on the inner cylinder corresponding to the oil return hole, and the position of the through hole is lower than the oil filter in the cylinder. A plurality of exhaust holes 17 are provided on the side. The oil droplets captured in the air cavity will gather in the oil drop groove and flow back to the inner cylinder along the oil return hole to avoid loss, and the purified gas will be discharged through the exhaust hole.

[0027] In an optional embodiment, an exhaust end oil filter 15 is provided above the corresponding exhaust hole on the inner wall of the side portion. As an example, an exhaust end oil filter can be arranged above each exhaust hole, and when the exhaust hole exhausts outward, the gas will be filtered again by the exhaust end oil filter before entering the exhaust hole to filter out tiny oil droplets, and the exhaust end oil filter can be arranged at an angle so that the captured oil droplets move to the oil droplet tank.

[0028] It should be noted that the above-mentioned exhaust end oil filter does not necessarily have to completely cover the exhaust hole, as long as it can play a certain role in filtering oil, and can be arranged according to the space between the cover body and the inner cylinder. Because the oil particles actually discharged through the exhaust hole are already very small after the oil filter in the cylinder, a number of adsorption rods and other structures have filtered the oil, of course, directly covering the exhaust hole is also feasible, which will not be repeated here.

[0029] When the gas passes through these adsorption rods, it will touch each adsorption rod and play the role of oil droplet adsorption. When a large amount of oil droplets accumulate on the adsorption rod, they will drip down along the adsorption rod. Each adsorption rod includes two forms: a long rod and a short rod, and the long rod and the short rod are arranged in sequence, or the long rod and the short rod are arranged irregularly on the top cover, so that the oil mist and the adsorption rod can repeatedly contact. The inner cylinder oil filter includes a filter covering the inner cross section of the inner cylinder. The inner cylinder oil filter is used to filter the oil mist gas discharged from the inner cylinder to the outer cover, and the oil droplets are adsorbed on the filter. When a large amount of oil droplets accumulate on the filter, they can drip downward or flow back along the inner cylinder.

[0030] The oil return hole is arranged at an angle, with its lower end facing the inside of the inner cylinder. The exhaust hole is arranged at an angle, with its lower end facing the inside of the cover. The holes at each position are designed to be inclined, so that the oil droplets in the hole are more likely to flow back to the inside instead of flowing to the outside, which is more conducive to oil recovery. A lower flange is provided at the upper end of the side of the cover, and an upper flange is provided at the lower end of the top cover. The upper and lower flanges are fixed by bolts, and a sealing gasket is provided between the upper and lower flanges. The connection part of the cover is welded and fixed to the inner cylinder.

[0031] In an optional embodiment, a circulating cooling pipe 16 can be arranged around the outer wall of the conical head and the outer wall of the inner cylinder (the part inside the outer cover). The inlet and outlet of the circulating cooling pipe can be arranged on the top cover or the cover body. Cooling water is circulated into the circulating cooling pipe through an external water supply device to reduce the temperature in the air cavity. At the same time, since heat is conducted between the circulating cooling pipe, the inner cylinder and the conical head, the temperature inside the conical head will also be reduced, which is beneficial to the condensation and adsorption of oil mist and can effectively remove tiny oil particles in the gas.

[0032] The invention has a reasonable structural design. When the oil mist is discharged outward through the inner cylinder, the oil droplet particles can be captured to the maximum extent when passing through the oil filter, the adsorption rod and the exhaust end oil filter in the cylinder. Especially in the scheme with a circulating cooling pipe, it is more conducive to capturing the oil droplet particles, making the gas discharged from the exhaust hole more environmentally friendly, and the oil droplets reflux to avoid excessive loss of oil.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A hydraulic generator oil mist collection device, characterized in that: It comprises an inner cylinder and an outer cover; the outer cover comprises a cover body which is mounted on the inner cylinder and a top cover which is detachably mounted on the cover body; a conical head is arranged at the upper end of the inner cylinder, the top end of the conical head is fitted to the lower surface of the top cover, a plurality of air holes are arranged on the side wall of the conical head, and an inner cylinder oil filter is installed in the inner cylinder, the inner cylinder oil filter is located at a position lower than the air holes, a plurality of adsorption rods are arranged at the lower end of the top cover, and the lower ends of the adsorption rods are all lower than the air holes; the cover body comprises a bottom and a side part, a connecting part which is combined with the inner cylinder is arranged at one end of the bottom facing the inner cylinder, an oil drop groove is formed between the connecting part and the side part, an oil return hole which is connected to the oil drop groove is arranged on the connecting part, a through hole is arranged on the inner cylinder corresponding to the oil return hole, and the position of the through hole is lower than the inner cylinder oil filter; a plurality of exhaust holes are arranged on the side part.

2. The oil mist collection device for a hydraulic generator according to claim 1, characterized in that: The adsorption rods include two forms: long rods and short rods, and the long rods and the short rods are arranged in sequence at intervals or irregularly.

3. The oil mist collection device for a hydraulic generator according to claim 1, characterized in that: The oil filter in the cylinder includes a filter screen covering the inner cross section of the inner cylinder.

4. The oil mist collection device for a hydraulic generator according to claim 1, characterized in that: The oil return hole is arranged obliquely, and its lower end faces the interior of the inner cylinder.

5. The oil mist collection device for a hydraulic generator according to claim 1, characterized in that: The exhaust hole is arranged obliquely, and its lower end faces the inside of the cover body.

6. The oil mist collection device for a hydraulic generator according to claim 1, characterized in that: A lower flange is arranged at the upper end of the side of the cover body, and an upper flange is arranged at the lower end of the top cover. The upper and lower flanges are fixed by bolts.

7. The oil mist collection device for a hydraulic generator according to claim 6, characterized in that: A sealing gasket is arranged between the upper flange and the lower flange.

8. The oil mist collection device for a hydro-generator according to claim 1, characterized in that: The connecting part of the cover body is fixed to the inner cylinder by welding.

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