Water turbine water guide bearing rotating oil basin capable of preventing oil mist from escaping

Abstract

The invention discloses a water turbine water guide bearing rotating oil basin capable of preventing oil mist from escaping. Oil mist of some units escapes severely, cleanliness and attractiveness of the units are affected, daily maintenance workload is increased, ecological environment pollution can be caused to rivers, and bearing oil quantity reduction caused by leakage threatens stable operation of the units. The device is characterized in that a rotating oil basin is divided into an upper cavity and a lower cavity which are relatively isolated by a partition plate, the partition plate and a rotating oil basin body are combined into a whole circle through a split surface bolt and a positioning pin, the whole circle is held on a boss of a main shaft, and the whole circle and a clamping ring which is divided into two sections are fixed on the main shaft through a rotating oil basin fixing bolt. The device is used for preventing oil mist from escaping from the rotating oil basin of the water turbine water guide bearing.

Description

Technical Field

[0001] The invention relates to a rotating oil basin for a water guide bearing of a water turbine that prevents oil mist from escaping. Background Art

[0002] Water-guided bearings for vertical turbines often utilize a self-circulating cylindrical bearing structure with a rotating oil basin. The rotating oil basin rotates at a high speed, creating a necessary gap between the bearing and the stationary components. The actual operation of existing water-guided bearings with rotating oil basins has revealed that oil mist leakage from the rotating oil basin is common in many turbines. In some turbines, this leakage is severe, affecting the cleanliness and aesthetics of the turbine, increasing routine maintenance workload, and causing ecological pollution to the river. The reduced bearing oil volume caused by leakage also threatens the stable operation of the turbine. Summary of the Invention

[0003] The object of the present invention is to address the problems existing in the background technology and thereby provide a rotating oil basin for a water guide bearing of a water turbine that prevents oil mist from escaping.

[0004] The above objectives are achieved through the following solutions: A rotating oil basin for a water-guide bearing of a turbine for preventing oil mist from escaping comprises a rotating oil basin body having two halves, a partition, bolts on the halves, and rotating oil basin fixing bolts. The partition is also divided into two halves and welded to the rotating oil basin body to form an integral structure. After the rotating oil basin is assembled, a small gap is left between the halves of the partition, and a small installation gap is left between the inner circumference of the partition and the back of a stationary bearing shell. The rotating oil pan is divided into two relatively isolated cavities, upper and lower, by a partition. The partition and the rotating oil pan body are combined into a whole circle by the petal surface bolts and positioning pins, which are embraced on the main shaft boss and fixed to the main shaft with the two-petal retaining ring through the rotating oil pan fixing bolts.

[0005] The turbine water guide bearing rotating oil pan for preventing oil mist from escaping is provided with a rotating oil pan fixing bolt installed from bottom to top, a blind hole is provided on the rotating oil pan body, and the inner surface of the oil pan is completely flat.

[0006] The invention discloses a water turbine water guide bearing rotating oil pan for preventing oil mist from escaping. The rotating oil pan fixing bolts are installed from top to bottom using hexagon socket screws. The rotating oil pan body is provided with a countersunk hole. After the hexagon socket screws are tightened, the countersunk hole is filled with epoxy resin.

[0007] The water guide bearing rotating oil basin of the water turbine for preventing oil mist from escaping is made of stainless steel plates, and the steel plate plane is not subjected to metal processing or painting. Beneficial effects

[0008] 1. The present invention can effectively reduce the escape of bearing oil mist, which not only ensures the cleanliness and appearance of the unit, reduces the workload of daily maintenance in the power station, and reduces the cost of replenishing new bearing oil, but also prevents bearing oil from entering the river and causing ecological and environmental pollution, and reduces the economic losses caused by abnormal shutdown of the unit due to maintenance and repair of bearings in the power plant. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 A three-dimensional schematic diagram of the present invention assembled in a bearing; Figure 2 It is a structural schematic diagram of the present invention; In the figure: 1. Rotating oil pan body; 2. Partition plate; 3. Split surface bolt; 4. Locating pin; 5. Snap ring; 6. Rotating oil pan fixing bolt; 7. Pitot tube. DETAILED DESCRIPTION

[0010] The technical solution of the present invention is further described below with reference to the accompanying drawings and specific embodiments.

[0011] A rotating oil basin for a water-guide bearing of a turbine to prevent oil mist from escaping comprises a rotating oil basin body 1 divided into two parts, a partition 2, a partition surface bolt 3 and a positioning pin 4, a retaining ring 5, and a rotating oil basin fixing bolt 6. The partition 2 is also divided into two parts and welded to the rotating oil basin body to form an integral structure. After the rotating oil basin is assembled, a small gap is left between the partition 2's partition surface, and a small installation gap is left between the inner circular surface of the partition 2 and the back of the stationary bearing. The rotating oil basin is divided into two relatively isolated upper and lower cavities by the partition 2. The partition 2 and the rotating oil basin body 1 are combined into a full circle by the partition surface bolt 3 and the positioning pin 4, and are then engaged on the main shaft boss. Then, the partition 2 and the rotating oil basin body 1 are fixed to the main shaft by the rotating oil basin fixing bolt 6 together with the two-part retaining ring 5. When the unit is in operation, it rotates with the main shaft.

[0012] According to the installation space conditions of the unit, the rotating oil pan fixing bolts 6 are installed from bottom to top. There is a blind hole on the rotating oil pan body 1, and the internal surface of the oil pan is completely flat.

[0013] According to the installation space conditions of the unit, the rotating oil pan fixing bolts 6 are installed from top to bottom with hexagon socket screws. There is a countersunk hole on the rotating oil pan body 1. After the hexagon socket screws are tightened, the countersunk hole is filled with epoxy resin to ensure that the internal surface of the oil pan is as flat as possible.

[0014] When the size of the rotating oil pan is small, the partition 2 is made of stainless steel plate, and the steel plate surface is not metal-processed or painted.

[0015] If the size of the rotating oil pan is large, the partition 2 can be made of carbon steel plate, the steel plate surface is metal-machined or only sandblasted, and painted together with the rotating oil pan body. It can also be made of stainless steel plate, the steel plate surface is not metal-machined or painted.

[0016] The key to solving the problem of bearing oil mist leakage lies in controlling the generation of oil mist at its source. The key to oil mist generation is oil splashing, especially when there is a discontinuous structure at the oil-air interface. Therefore, the structural improvement of the present invention is to control the source of oil mist generation.

[0017] The partition 2 is an innovative structural improvement of the present invention. Due to the presence of the partition 2, the rotating oil basin is divided into relatively independent upper and lower chambers. The Pitot tube 7 is located in the lower chamber, leaving the upper chamber directly connected to the outside atmosphere without a discontinuous structure. During operation, due to the gap between the petals of the partition 2, the oil in the rotating oil basin adheres to the wall of the rotating oil basin under the action of centrifugal force. The interface between the oil and the atmosphere forms a continuous and stable parabola. As a result, there is no source of oil mist in the upper chamber of the rotating oil basin.

[0018] When the oil pan fixing bolts 6 are installed from bottom to top, the interior of the oil pan is completely flat, with no discontinuous structures that could collide with the oil flow, thus controlling the generation of oil mist. When the oil pan fixing bolts 6 are installed from top to bottom using hexagon socket screws, the countersunk holes on the oil pan body 1 are filled with epoxy resin, ensuring that the interior of the oil pan is as flat as possible, with virtually no discontinuous structures that could collide with the oil flow, thus controlling the generation of oil mist.

Claims

1. A rotating oil basin of a water guide bearing of a water turbine for preventing oil mist from escaping, characterized by: The oil pan body is composed of a rotating oil pan body divided into two parts, a partition, a partition surface bolt and a rotating oil pan fixing bolt. The partition is also divided into two parts and is welded to the rotating oil pan body to form an integrated structure. After the rotating oil pan is assembled, a small gap is left between the partition surface and the inner circular surface of the partition and the back of the stationary fixed bearing shell. The rotating oil pan is divided into two relatively isolated cavities, upper and lower, by a partition. The partition and the rotating oil pan body are combined into a whole circle by petal surface bolts and positioning pins, embraced on the main shaft boss, and fixed to the main shaft with the two-petal retaining ring through the rotating oil pan fixing bolts.

2. The rotating oil basin of a water turbine water guide bearing for preventing oil mist from escaping according to claim 1 is characterized by: The rotating oil pan fixing bolts are installed from bottom to top, the rotating oil pan body is provided with blind holes, and the inner surface of the oil pan is completely flat.

3. The rotating oil basin of a water turbine water guide bearing for preventing oil mist from escaping according to claim 2 is characterized by: The rotating oil pan fixing bolts are installed from top to bottom by hexagon socket screws. The rotating oil pan body is provided with countersunk holes. After the hexagon socket screws are closed, the countersunk holes are filled with epoxy resin.

4. The rotating oil basin of a water turbine water guide bearing for preventing oil mist from escaping according to claim 3 is characterized by: The partition is made of stainless steel plate, and the plane of the steel plate is not metal-processed or painted.

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