An oil mist leakage prevention device for a hydro-generator

Abstract

The utility model provides an oil mist anti-leakage device for a hydro-turbine generator, characterized in that it comprises a sleeve sleeved on an oil retaining pipe, the bottom of the sleeve is closed, an annular cavity with an open top is provided between the sleeve and the oil retaining pipe, a lifting seal sleeve is provided in the annular cavity, the top of the lifting seal sleeve is connected to the inner flat wall of the thrust head but not connected, and a clamping assembly is provided in the annular cavity at the bottom of the lifting seal sleeve. The clamping assembly provides a continuous clamping force to the lifting seal sleeve, so that the top of the lifting seal sleeve is in close contact with the inner flat wall of the thrust head to achieve sealing, thereby solving the problem of oil mist escaping from the gap between the oil retaining pipe and the thrust head.

Description

Technical Field

[0001] The utility model relates to an anti-leakage device, in particular to an oil mist anti-leakage device for a water turbine generator, and belongs to the technical field of mechanical design and manufacturing. Background Art

[0002] When the turbine generator is running, as the oil temperature in the frame oil pool increases and the rotating parts are agitated, vaporous oil mist will inevitably be generated. These oil mists will flow and drift with the air in the unit. Once they encounter low-temperature parts and stop, they will condense into liquid oil droplets. If the oil mist flows into the upper end of the rotor from the inside of the thrust head and the oil retaining pipe, it will have a great adverse effect on the operation of the unit. The current anti-oil mist measures mainly add anti-oil mist mechanisms to the upper end of the oil retaining pipe and the inside of the thrust head, so as to extend the oil mist path, increase the condensation time, and allow the oil droplets to return to the oil pool. However, since the oil retaining pipe is a stationary part and the thrust head is a high-speed rotating part, it is difficult to observe the thrust head when it is hoisted from the top during assembly. In order to avoid collision, the assembly gap can only be increased, which must cause some oil mist to escape. Therefore, it is necessary to improve the existing technology. Summary of the invention

[0003] In order to solve the problem that oil mist is easily leaked and drifted between the oil retaining pipe and the thrust head of the existing hydro-turbine generator, thereby affecting the operation of the generator, the utility model provides an oil mist anti-leakage device for the hydro-turbine generator.

[0004] The utility model is completed through the following technical solutions: an oil mist anti-leakage device for a hydro-turbine generator, characterized in that it includes a sleeve sleeved on an oil retaining pipe, the bottom of the sleeve is closed, an annular cavity with an open top is provided between the sleeve and the oil retaining pipe, a lifting seal sleeve is provided in the annular cavity, the top of the lifting seal sleeve is connected to the inner flat wall of the thrust head but not connected, a clamping component is provided in the annular cavity at the bottom of the lifting seal sleeve, so as to provide continuous clamping force to the lifting seal sleeve through the clamping component, so that the top of the lifting seal sleeve is in close contact with the inner flat wall of the thrust head to achieve sealing, thereby solving the problem of oil mist escaping from the gap between the top of the oil retaining pipe and the inner flat wall of the thrust head.

[0005] The sleeve is configured as an annular sleeve with an inner diameter greater than the outer diameter of the oil retaining tube, and an annular bottom plate is provided between the bottom of the sleeve and the oil retaining tube to form a sleeve with an open top and a closed bottom, so that the lifting sealing sleeve and the clamping assembly are placed in the annular cavity between the sleeve and the oil retaining tube, and the lifting sealing sleeve can move up and down along the annular cavity.

[0006] The lifting and lowering sealing sleeve is configured as a vertical cylinder, which is sleeved on the outer wall of the oil retaining pipe and is located in the annular cavity. The inner diameter of the lifting and lowering sealing sleeve is adapted to the outer diameter of the oil retaining pipe, and the outer diameter of the lifting and lowering sealing sleeve is adapted to the inner diameter of the sleeve. A circle of annular grooves is provided on the top of the lifting and lowering sealing sleeve, and a sealing ring is provided in the annular groove so as to achieve sealing between the oil retaining pipe and the thrust head through the sealing contact between the lifting and lowering sealing sleeve and the inner flat wall of the thrust head.

[0007] The lifting sealing sleeve is formed by splicing multiple arc-shaped plates together. The vertical edges where two arc-shaped plates are connected are provided with overlapping bosses and grooves to facilitate the installation or removal of the lifting sealing sleeve. The arrangement of the bosses and grooves can ensure the sealing of the connection between the arc-shaped plates.

[0008] The lifting seal sleeve is made of conventional self-lubricating polymer wear-resistant material to ensure the wear resistance, self-lubricating property and sealing property of the lifting seal sleeve.

[0009] The clamping assembly includes a spring vertically arranged at the bottom of the lifting sealing sleeve and located in the annular cavity, and a vertical positioning rod inserted into the spring. The upper end of the vertical positioning rod is plugged into a hole groove arranged at the bottom of the lifting sealing sleeve, and the lower end extends downward through a through hole arranged on the annular bottom plate at the bottom of the sleeve.

[0010] The clamping components are provided in plurality and are evenly spaced between the bottom of the lifting seal sleeve and the annular bottom plate at the bottom of the sleeve, so that a clamping force is applied to the lifting seal sleeve through a spring, so that the upper end of the lifting seal sleeve is always in close contact with the inner flat wall of the thrust head.

[0011] The utility model has the following advantages and effects: adopting the above scheme, the clamping assembly provides a continuous clamping force to the lifting seal sleeve, so that the top of the lifting seal sleeve is in close contact with the inner wall of the thrust head to achieve sealing, solving the problem of oil mist escaping from the gap between the oil retaining pipe and the thrust head. Self-lubricating polymer materials are used as contact seals, and their density and friction coefficient are very small. The operating temperature is -100℃~200℃, which fully meets the operation of the unit. As the use time increases, the lifting seal sleeve is lifted up by the spring force after being worn, so that the lifting seal sleeve always keeps in contact with the thrust head, playing a self-compensation role. After the spring is stretched, the positive pressure of the contact surface gradually decreases, and the friction torque also decreases accordingly, which can ensure the long-term effectiveness of the seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model;

[0013] Figure 2 for Figure 1 A partial enlarged view of the

[0014] Figure 3 for Figure 2 Partial cross-sectional view of the lifting seal sleeve. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in this embodiment to clearly and completely describe the technical solution of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of 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. Example

[0016] The utility model provides an oil mist anti-leakage device for a hydro-turbine generator, comprising: a sleeve 4 sleeved on an oil retaining pipe 1, the bottom of the sleeve 4 is closed, an annular cavity with an open top is provided between the sleeve 4 and the oil retaining pipe 1, a lifting seal sleeve 5 is provided in the annular cavity, the top of the lifting seal sleeve 5 is connected to the inner flat wall of the thrust head 6 but not connected, a pressing component 3 is provided in the annular cavity at the bottom of the lifting seal sleeve 5, so that a continuous pressing force is provided to the lifting seal sleeve 5 through the pressing component 3, so that the top of the lifting seal sleeve 5 is in close contact with the inner flat wall of the thrust head 6 to achieve sealing, and solve the problem that oil mist escapes from the gap between the top of the oil retaining pipe 1 and the inner flat wall of the thrust head 6;

[0017] The sleeve 4 is an annular sleeve with an inner diameter larger than the outer diameter of the oil retaining tube 1. An annular bottom plate 2 is provided between the bottom of the sleeve 4 and the oil retaining tube 1 to form a sleeve 4 with an open top and a closed bottom, so that the lifting seal sleeve 5 and the pressing assembly 3 are placed in the annular cavity between the sleeve 4 and the oil retaining tube 1, and the lifting seal sleeve 5 can move up and down along the annular cavity;

[0018] The lifting seal sleeve 5 is set as a vertical cylinder, which is sleeved on the outer wall of the oil retaining pipe 1 and is located in the annular cavity. The inner diameter of the lifting seal sleeve 5 is adapted to the outer diameter of the oil retaining pipe 1, and the outer diameter of the lifting seal sleeve 5 is adapted to the inner diameter of the sleeve 4. A circle of annular groove 11 is provided on the top of the lifting seal sleeve 5, and a sealing ring is provided in the annular groove 11, so as to achieve sealing between the oil retaining pipe 1 and the thrust head 6 through the sealing contact between the lifting seal sleeve 5 and the inner flat wall of the thrust head 6;

[0019] The lifting seal sleeve 5 is formed by splicing a plurality of arc-shaped plates 12 together. The vertical edges where two arc-shaped plates 12 are connected are provided with overlapping concave platforms 13 and grooves 14 to facilitate installation or removal of the lifting seal sleeve 5. The arrangement of the concave platforms 13 and grooves 14 can ensure the sealing of the connection between the arc-shaped plates 12.

[0020] The lifting seal sleeve 5 is made of conventional self-lubricating polymer wear-resistant material to ensure the wear resistance, self-lubricating property and sealing property of the lifting seal sleeve 5;

[0021] The clamping assembly 3 includes a spring 8 vertically arranged at the bottom of the lifting sealing sleeve 5 and located in the annular cavity, and a vertical positioning rod 9 penetrating the spring 8, the upper end of the vertical positioning rod 9 is plugged into a hole groove 10 arranged at the bottom of the lifting sealing sleeve 5, and the lower end of the vertical positioning rod 9 extends downward through a through hole 7 arranged on the annular bottom plate 2 at the bottom of the sleeve 4;

[0022] There are multiple clamping assemblies 3, which are evenly spaced between the bottom of the lifting sealing sleeve 5 and the annular bottom plate 2 at the bottom of the sleeve 4, so that a clamping force is applied to the lifting sealing sleeve 5 through the spring 8, so that the upper end of the lifting sealing sleeve 5 is always in close contact with the inner flat wall of the thrust head 6.

[0023] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0024] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An oil mist leakage prevention device for a hydro-generator, characterized in that It includes a sleeve sleeved on an oil retaining pipe, the bottom of the sleeve is closed, an annular cavity with an open top is provided between the sleeve and the oil retaining pipe, a lifting sealing sleeve is provided in the annular cavity, the top of the lifting sealing sleeve is connected to the inner flat wall of the thrust head but not connected, and a clamping component is provided in the annular cavity at the bottom of the lifting sealing sleeve.

2. The oil mist leakage prevention device for a hydraulic generator according to claim 1 is characterized in that The sleeve is set as an annular sleeve with an inner diameter larger than the outer diameter of the oil retaining tube, and an annular bottom plate is arranged between the bottom of the sleeve and the oil retaining tube to form a sleeve with an open top and a closed bottom.

3. The oil mist leakage prevention device for a hydraulic generator according to claim 1 is characterized in that The lifting sealing sleeve is configured as a vertical cylinder, which is sleeved on the outer wall of the oil retaining tube and is located in the annular cavity. The inner diameter of the lifting sealing sleeve is adapted to the outer diameter of the oil retaining tube, the outer diameter of the lifting sealing sleeve is adapted to the inner diameter of the sleeve, and a circle of annular groove is provided on the top of the lifting sealing sleeve, and a sealing ring is provided in the annular groove.

4. The oil mist leakage prevention device for a hydraulic generator according to claim 1 is characterized in that The lifting sealing sleeve is formed by splicing a plurality of arc-shaped plates together, and overlapping bosses and grooves are arranged at the vertical edges where two arc-shaped plates are connected.

5. The oil mist anti-leakage device for a hydraulic generator according to claim 1, characterized in that The clamping assembly includes a spring vertically arranged at the bottom of the lifting sealing sleeve and located in the annular cavity, and a vertical positioning rod inserted into the spring. The upper end of the vertical positioning rod is plugged into a hole groove arranged at the bottom of the lifting sealing sleeve, and the lower end extends downward through a through hole arranged on the annular bottom plate at the bottom of the sleeve.

6. The oil mist leakage prevention device for a hydraulic generator according to claim 1, characterized in that The clamping components are arranged in plurality and are evenly spaced between the bottom of the lifting sealing sleeve and the annular bottom plate at the bottom of the sleeve.

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