Oil-receiving sealing structure of water turbine

Abstract

The utility model relates to the technical field of water turbine oil-receiving sealing, in particular to a water turbine oil-receiving sealing structure which comprises an upper end cover and a lower end cover, shaft holes are formed in the middle of the upper end cover and the middle of the lower end cover, a main shaft is arranged in the shaft holes, and a sealing ring structure is clamped between the upper end cover and the lower end cover and located on the outer side of the main shaft. A first oil groove and a second oil groove are formed in the positions, located on the sealing ring structure, of the lower side of the upper end cover and the upper side of the lower end cover correspondingly, circular grooves are formed in the positions, located on the main shaft, of the upper side and the lower side of the sealing ring structure correspondingly, limiting ring protrusions are fixed to the positions, located on the circular grooves, of the side faces of the first oil groove and the second oil groove correspondingly, and a plurality of capillary oil groove channels are formed in the edge of the outer side of the sealing ring structure. The self-flowing oil inlet solves the problems that due to the fact that an opening of an existing self-flowing oil inlet faces downwards, oil liquid cannot enter the self-flowing oil inlet conveniently, and the oil liquid cannot be conveyed into a main shaft for lubrication conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of water turbine oil receiving seals, in particular to a water turbine oil receiving seal structure. Background Art

[0002] The oil receiver is an important part of the turbine. Its main function is to introduce the pressure oil of the speed control system from the fixed oil pipe into the rotating operating oil pipe, and transmit it to the blade relay to timely and effectively adjust the blade opening, so that the unit is always operating under cooperative conditions. Common faults include oil spillage and oil leakage caused by wear of the floating pad, and frequent start-up of the oil pressure pump. Therefore, during operation, attention should be paid to whether the blade relay is twitching, whether the oil spillage of the oil receiver is large, whether the load adjustment is in line with the cooperative curve, and avoid operation in low head and high vibration areas;

[0003] A new self-adjusting oil receiver sealing structure is disclosed in the Chinese utility model patent with application number: CN201921488469.9, which comprises an upper end cover and a lower end cover, wherein the center of the upper end cover and the lower end cover is provided with an axial hole for the main shaft to pass through, an annular sealing cavity is formed between the upper end cover and the lower end cover, an annular opening is provided on the inner side wall of the sealing cavity, a sealing member is provided in the sealing cavity, and the sealing member comprises a sealing portion located in the sealing cavity and a tightening portion located on the inner side groove wall of the sealing cavity; a self-flowing oil inlet hole is provided on the outer side wall of the sealing cavity;

[0004] In this structure, since the opening of the gravity oil inlet hole is downward, it is not easy for the lubricating oil to enter the sealing cavity smoothly during lubrication, so that the oil cannot lubricate the main shaft in time, and since the outer side of the sealing part is in close contact with the side wall of the sealing cavity, it is not convenient for the oil to flow by itself. Utility Model Content

[0005] The technical problem to be solved by the utility model is that the existing gravity oil inlet hole is not convenient for oil to enter because the opening faces downward, and the oil is not convenient to be transported into the main shaft for lubrication.

[0006] In order to solve the above problems, the technical solution adopted by the utility model is a turbine oil sealing structure, including an upper end cover and a lower end cover, wherein an axial hole is opened in the middle of the upper end cover and the lower end cover, a main shaft is arranged in the axial hole, a sealing ring structure is clamped between the upper end cover and the lower end cover at the outside of the main shaft, an oil tank 1 and an oil tank 2 are respectively opened at the lower side of the upper end cover and the upper side of the lower end cover at the sealing ring structure, circular grooves are opened at the main shaft on the upper and lower sides of the sealing ring structure, and limiting ring convexes are fixed on the sides of the oil tank 1 and the oil tank 2 at the circular grooves, a plurality of capillary oil grooves are opened at the outer edge of the sealing ring structure, and a plurality of oil pipelines are opened inside the upper end cover.

[0007] As a further solution of the utility model: both ends of the oil pipeline are respectively connected with the upper end cover and the oil tank 1, so as to facilitate the self-flow of oil into the oil tank 1 and the oil tank 2.

[0008] As a further solution of the utility model: elliptical cross-section gaskets are sandwiched between the upper and lower sides of the sealing ring structure and the oil tank 1 and the oil tank 2 to play a sealing role.

[0009] As a further solution of the utility model: a sealing gasket is sleeved on the inner side of the limiting ring convex and located on the outer side of the main shaft to play a sealing role.

[0010] As a further solution of the utility model: an annular groove is provided on the lower side of the upper end cover, and a sealing ring gasket is clamped in the annular groove to play a sealing role.

[0011] As a further solution of the utility model: a plurality of bolt connection holes are provided on the upper side of the upper end cover and the upper side of the lower end cover.

[0012] Compared with the prior art, the utility model has the following advantages: 1. The patent adds a capillary oil channel, which can facilitate the oil to smoothly enter the shaft hole from the oil tank to achieve lubrication effect;

[0013] 2. An oil pipeline is added inside the upper end cover to facilitate the oil to flow into the oil tank by gravity. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0015] Figure 1 The utility model is a three-dimensional diagram of the overall structure of a turbine oil sealing structure.

[0016] Figure 2 The utility model is a cross-sectional view of the overall structure of a turbine oil receiving seal structure.

[0017] Figure 3 The utility model is a cross-sectional view of an oil pipeline in a water turbine oil receiving seal structure.

[0018] Figure 4 The utility model is a three-dimensional diagram of a sealing ring structure in a turbine oil receiving sealing structure.

[0019] Figure 5 It is an enlarged view of the A part structure in the oil receiving seal structure of a water turbine of the utility model.

[0020] In the attached figure:

[0021] 1. Upper end cover; 2. Lower end cover; 3. Main shaft; 4. Sealing ring structure; 5. Elliptical section gasket; 6. Sealing gasket; 7. Sealing ring gasket; 1.1. Oil tank 1; 1.2. Oil pipeline; 1.3. Annular groove; 2.1. Oil tank 2; 4.1. Circular groove. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] The utility model provides a technical solution to solve the existing problems raised in the background technology.

[0024] Combined with Figure 1 It can be known that the structure includes an upper end cover 1 and a lower end cover 2. An axial hole is opened in the middle of the upper end cover 1 and the lower end cover 2. A main shaft 3 is arranged in the axial hole. A plurality of oil pipelines 1.2 are opened inside the upper end cover 1 to facilitate the self-flow of oil into the oil tank 1.1 and the oil tank 2.1.

[0025] Combined with Figure 4 It can be seen that a plurality of capillary oil channels are provided at the outer edge of the sealing ring structure 4, so that the oil can flow in the oil channel 1.1 and the oil channel 2.1, so as to lubricate the main shaft 3;

[0026] Combined with Figure 2 , 3 , 5, it can be known that a sealing ring structure 4 is sandwiched between the upper end cover 1 and the lower end cover 2 on the outer side of the main shaft 3, and an oil tank 1.1 and an oil tank 2.1 are respectively opened at the sealing ring structure 4 on the lower side of the upper end cover 1 and the upper side of the lower end cover 2. Circular grooves 4.1 are opened on the upper and lower sides of the sealing ring structure 4 on the main shaft 3. The sides of the oil tank 1.1 and the oil tank 2.1 are fixed with limited ring convexities at the circular groove 4.1, and the two ends of the oil pipeline 1.2 are respectively connected to the upper and lower ends of the upper end cover 1. The oil tanks 1.1 are interconnected; an elliptical cross-section gasket 5 is sandwiched between the upper and lower sides of the sealing ring structure 4 and the oil tank 1.1 and the oil tank 2 2.1, which can play a sealing role; the inner side of the limit ring convex is located on the outer side of the main shaft 3 and is sleeved with a sealing gasket 6, which can play a sealing role; an annular groove 1.3 is opened on the lower side of the upper end cover 1, and a sealing ring gasket 7 is sandwiched in the annular groove 1.3, which can play a sealing role; a plurality of bolt connection holes are opened on the upper sides of the upper end cover 1 and the lower end cover 2.

[0027] The working principle of this patent is that when the main shaft needs to be lubricated, the oil will first enter the oil tank 1.1 and the oil tank 2.1 through one end of the oil pipeline 1.2 on the surface of the upper end cover 1. When the oil fills the oil tank 1.1 and the oil tank 2.1, it will flow along a number of capillary oil channels toward the direction of the elliptical cross-section gasket 5 until it enters the circular groove 4.1 and the connection with the main shaft 3 to achieve lubrication.

[0028] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.

Claims

1. A turbine oil sealing structure, comprising an upper end cover (1) and a lower end cover (2), wherein the upper end cover (1) and the lower end cover (2) are both provided with an axial hole in the middle, and a main shaft (3) is provided in the axial hole, wherein: A sealing ring structure (4) is sandwiched between the upper end cover (1) and the lower end cover (2) on the outer side of the main shaft (3); an oil tank 1 (1.1) and an oil tank 2 (2.1) are respectively provided on the lower side of the upper end cover (1) and the upper side of the lower end cover (2) at the sealing ring structure (4); circular grooves (4.1) are provided on the upper and lower sides of the sealing ring structure (4) at the main shaft (3); limiting annular protrusions are fixed on the sides of the oil tank 1 (1.1) and the oil tank 2 (2.1) at the circular grooves (4.1); a plurality of capillary oil channels are provided at the outer edge of the sealing ring structure (4); and a plurality of oil delivery pipelines (1.2) are provided inside the upper end cover (1).

2. The turbine oil seal structure according to claim 1, characterized in that: Both ends of the oil delivery pipeline (1.2) are respectively connected to the top of the upper end cover (1) and the oil tank one (1.1).

3. The turbine oil seal structure according to claim 1, characterized in that: Elliptical cross-section washers (5) are sandwiched between the upper and lower sides of the sealing ring structure (4) and the first oil tank (1.1) and the second oil tank (2.1).

4. The water turbine oil seal structure according to claim 1, characterized in that: The inner side of the limit ring convex is located on the outer side of the main shaft (3) and is sleeved with a sealing gasket (6).

5. The turbine oil seal structure according to claim 1, characterized in that: An annular groove (1.3) is provided on the lower side of the upper end cover (1), and a sealing ring gasket (7) is clamped in the annular groove (1.3).

6. The water turbine oil seal structure according to claim 1, characterized in that: A plurality of bolt connection holes are provided on the upper sides of the upper end cover (1) and the lower end cover (2).

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