CN217002126U

CN217002126U - Structure for preventing leakage of lower guide oil basin of vertical water turbine generator set and lower frame oil basin

Info

Publication number: CN217002126U
Application number: CN202220689488.3U
Authority: CN
Inventors: 李义生; 赵宁; 王熠
Original assignee: Qinghai Yinda Jihuang Engineering Comprehensive Development Co ltd
Current assignee: Qinghai Yinda Jihuang Engineering Comprehensive Development Co ltd
Priority date: 2022-03-28
Filing date: 2022-03-28
Publication date: 2022-07-19
Anticipated expiration: 2032-03-28

Abstract

The utility model discloses a structure for preventing a lower oil guide basin of a vertical water turbine generator set from leaking and an oil guide basin of a lower frame. The oil-resistant rubber plate sealing device has the advantages that the whole structure is simple, the cost is ideal, and the problems that the original oil-resistant rubber plate sealing device is stressed unevenly and easily deformed in the installation process and the oil leakage at the lower joint is influenced can be effectively solved. The water quality of the downstream is ensured, and the Laval accident and the risk of casualties of inspection personnel are avoided.

Description

Structure for preventing leakage of lower guide oil basin of vertical water turbine generator set and lower frame oil basin

Technical Field

The utility model relates to the technical field of leakage prevention of a lower oil guide basin of a vertical hydroelectric generating set in a hydropower station, in particular to a structure for preventing the leakage of the lower oil guide basin of the vertical hydroelectric generating set and a lower frame oil guide basin.

Background

The mixed-flow vertical shaft water turbine generator unit lower frame oil basin is mainly composed of lower oil guide basin, radial bearing bush, bearing seat, upper and lower retaining bush plates, cooler, temperature measuring resistor, upper cover plate, lower cover plate (upper and lower cover plates are split structure) and oil retaining barrel. The oil-leakage phenomenon often appears at the seams of the lower cover plate and the oil basin of the lower frame, the lower cover plate and the oil blocking barrel and the lower cover plate when the water guide oil basin is found in operation and maintenance for many years. The oil-resistant rubber plate is used for sealing in the original scheme, and the oil-resistant rubber plate is sealed in the installation process because the stress in the tightening process of the fixing bolt is uneven, so that the rubber plate is extruded and deformed easily, and the oil leakage phenomenon can occur at the joint and the place which is extruded seriously under the influence of the temperature change and the vibration of the unit. Long-term oil leakage may pose the following risks: risk of contamination of downstream water quality; the risk of 'bearing bush pulling' accidents caused by oil shortage of the unit is avoided; the leaked oil drips on the pedal of the waterwheel room, so that the risk of casualties caused by the slipping of patrolling personnel is easily caused.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model solves the problem of oil leakage of the lower cover plate of the lower oil guide basin by reforming the water oil guide basin, forming two circles of grooves at the positions of the lower cover plate and the lower oil guide basin as well as the positions of the lower cover plate and the oil stopping barrel, forming two grooves at the positions of the joints of the split valve of the lower cover plate, placing sealing strips into the grooves, and connecting and fastening bolts of each joint. The purpose provides the structure that leads oil pan and leads oil pan down that prevents vertical hydroelectric set from leading oil pan and leaking down.

In order to achieve the purpose, the utility model provides the following technical scheme:

the structure for preventing the leakage of the lower oil guide basin of the vertical water turbine generator set comprises a lower oil guide basin 1, a lower cover plate 2, a groove A3, a groove B4, a groove C5, an O-shaped sealing strip 6 and an oil blocking barrel 7; the groove A3 is formed in the inner side, close to the circle center, of the lower oil guide basin 1 and the lower cover plate 2 spigot surface fixing bolt; the groove B4 is formed on the outer side of the lower cover plate 2 and the oil baffle barrel 7 spigot surface fixing bolt close to the circle center; the groove C5 is arranged on the upper side of the connecting bolt of the split joint of the lower cover plate 2 and is connected with the groove A3 and the groove B4; the split surface of the lower cover plate 2 without the groove and the joint surface of the grooved surface are smooth; the O-shaped sealing strip 6 is matched with the groove A3, the groove B4 and the groove C5 for use.

Furthermore, the groove A3 and the groove B4 are both circular grooves which are formed by taking the circle center of the lower cover plate as a reference point.

Furthermore, the sectional area of the groove A3, the groove B4 and the groove C5 is two thirds of the sectional area of the O-shaped sealing strip 6, so that the O-shaped sealing strip 6 can completely fill the three grooves.

Furthermore, the head end and the tail end of the O-shaped sealing strip 6 placed in the groove C5 are reserved with filling ends, the filling grooves A3 and the groove B4 are filled, the seamless connection effect of the O-shaped sealing strips in the three grooves is achieved, and oil leakage from joints is prevented.

Furthermore, the outer layer of the O-shaped sealing strip 6 is coated with a sealing glue, and a protective layer is arranged on the outer side of the sealing glue, so that the sealing effect is improved; the connecting end of the O-shaped sealing strip 6 is a V-shaped opening.

The utility model also protects a lower frame oil basin which comprises the structure for preventing the leakage of the lower oil guiding basin of the vertical water turbine generator set, the lower oil guiding basin 1, a bearing seat, an upper and a lower tile baffle plates, a cooler 9, a lower tile guide 10, a temperature measuring resistor, an upper cover plate 11, a lower cover plate 2 and an oil blocking barrel 7.

Compared with the prior art, the utility model has the following beneficial effects:

according to the utility model, the outer circle of the lower cover plate, which is taken as a reference point, is close to the inner side of the fixing bolt to form the groove A, the inner circle of the lower cover plate, which is close to the outer side of the fixing bolt, is provided with the groove B, the upper side of the lower cover plate is provided with the groove C, the split joint of the lower cover plate is connected with the upper side of the bolt, the O-shaped sealing strip is placed in the groove, the split lower cover plate is connected with the lower oil guide basin through the bolt, and then the sealing structure of the split lower cover plate is changed after the split lower cover plate is combined and connected with the lower oil guide basin, so that the purpose of preventing the lower oil guide basin of the vertical water turbine generator set from leaking is achieved. The oil-resistant rubber plate sealing device has the advantages that the whole structure is simple, the cost is ideal, and the phenomenon that the original oil-resistant rubber plate sealing device is stressed unevenly and easily deformed in the installation process and the oil leakage at the lower joint is influenced can be effectively solved. The downstream water quality is ensured, and the tile pulling accident and the risk of casualties of inspection personnel are avoided.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is an enlarged schematic view of AA in FIG. 1;

FIG. 3 is a top view of the lower deck of the present invention;

FIG. 4 is a front cross-sectional view of the lower deck of the present invention;

FIG. 5 is a schematic view of the overall structure of the present invention before modification;

fig. 6 is an enlarged view of BB in fig. 5.

In the figure: 1. a lower frame oil pan; 2. a lower cover plate; 3. a groove A; 4. a groove B; 5. a groove C; 6. an "O" shaped seal bar; 7. an oil blocking barrel; 8. an oil containing barrel; 9. a cooler; 10. A lower guide shoe; 11. an upper cover plate; 12. a top tile screw; 13. and a rubber sealing plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

Example 1

Referring to the attached drawings 1-4, the structure for preventing the leakage of the lower oil guide basin of the vertical water turbine generator set comprises a lower oil guide basin 1, a lower cover plate 2, a groove A3, a groove B4, a groove C5, an O-shaped sealing strip 6 and an oil blocking barrel 7; the groove A3 is formed on the inner side of the spigot surface fixing bolt close to the circle center of the lower oil guide basin 1 and the lower cover plate 2; the groove B4 is arranged on the outer side of the circle center of the lower cover plate 2 and the oil baffle barrel 7 spigot surface fixing bolt; the groove C5 is arranged on the upper side of the connecting bolt of the split joint of the lower cover plate 2 and is connected with the groove A3 and the groove B4; the split surface of the lower cover plate 2 without the groove is smooth with the joint surface of the grooved surface; the O-shaped sealing strip 6 is matched with the groove A3, the groove B4 and the groove C5 for use.

Preferably, the groove A3 and the groove B4 are both circular grooves which are formed by taking the circle center of the lower cover plate as a reference point.

Preferably, the sectional areas of the groove A3, the groove B4 and the groove C5 are two thirds of the sectional area of the O-shaped sealing strip 6, so that the O-shaped sealing strip 6 can completely fill the three grooves.

Optimally, the head end and the tail end of the O-shaped sealing strip 6 placed in the groove C5 are reserved with filling ends, the groove A3 and the groove B4 are filled, the seamless connection effect of the O-shaped sealing strips in the three grooves is achieved, and oil leakage from joints is prevented.

The optimized O-shaped sealing strip 6 is coated with a sealing glue on the outer layer, and a protective layer is arranged on the outer side of the sealing glue, so that the sealing effect is improved; the connecting end of the O-shaped sealing strip 6 is a V-shaped opening.

The utility model provides a lower frame oil pan, includes foretell structure, lower oil pan 1, bearing frame, upper and lower fender tile board, cooler 9, lower guide tile 10, temperature measurement resistance, upper cover plate 11, lower apron 2 and fender oil bucket 7 that prevent vertical hydroelectric set from leading oil pan to leak down.

Example 2

Based on embodiment 1, as shown in the attached figures 1-4, the structure for preventing the leakage of the lower oil guide basin of the vertical water turbine generator set comprises the following improvement processes:

(1) the lower oil guide basin takes the center of the lower cover plate as a reference point, two circles of concentric grooves (note: the sectional area of the groove is 2/3 of the section of an O-shaped sealing strip) are formed on the outer circle and the inner circle of the lower cover plate close to the seam allowance of the fixing bolt, the groove A of the outer circle is formed on the inner side of the lower oil guide basin close to the center of the circle and the groove B of the inner circle is formed on the outer side of the lower cover plate close to the seam allowance of the oil baffle bucket close to the center of the circle.

(2) A groove C is formed in one side of a contact surface of one petal and the other petal of the lower cover plate, the groove C is connected with an inner circle center groove and an outer circle center groove of the lower cover plate, and the surface without the groove is ensured to be flat and smooth with a joint surface of the groove.

(3) When the split lower cover is installed, the O-shaped sealing strips are arranged in the split lower cover plate joint groove C, the head and tail ends of the O-shaped sealing strips are reserved and filled in the groove A and the groove B, the seamless connection effect of the O-shaped sealing strips in the three grooves is achieved, and oil leakage from joints is prevented.

(4) Before the O-shaped sealing strips are placed in the three rectangular grooves, a layer of sealant is coated in the sealing grooves to improve the sealing effect.

(5) The O-shaped sealing strip resistant to the steam turbine oil is selected, and a connecting port of the sealing strip is adhered through a V-shaped port.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. Prevent structure that vertical hydroelectric set led oil pan down and leaked, its characterized in that: comprises a lower oil guide basin (1), a lower cover plate (2), a groove A (3), a groove B (4), a groove C (5), an O-shaped sealing strip (6) and an oil blocking barrel (7); the groove A (3) is formed in the lower oil guide basin (1) and the inner side, close to the circle center, of the spigot surface fixing bolt of the lower cover plate (2); the groove B (4) is formed in the outer side, close to the circle center, of a lower cover plate (2) and a spigot surface fixing bolt of the oil blocking barrel (7); the groove C (5) is formed in the upper side of the lower cover plate (2) split joint connecting bolt and is connected with the groove A (3) and the groove B (4); the split surface of the lower cover plate (2) which is not provided with the groove is smooth with the joint surface of the grooved surface; the O-shaped sealing strip (6) is matched with the groove A (3), the groove B (4) and the groove C (5) for use.

2. The structure for preventing the leakage of the lower oil guide basin of the vertical water turbine generator set according to claim 1, characterized in that: the grooves A (3) and the grooves B (4) are circular grooves which are formed by taking the circle center of the lower cover plate as a reference point.

3. The structure for preventing the leakage of the lower oil guide basin of the vertical water turbine generator set according to claim 1, characterized in that: the sectional areas of the groove A (3), the groove B (4) and the groove C (5) are two thirds of the sectional area of the O-shaped sealing strip (6).

4. The structure for preventing the leakage of the lower oil guide basin of the vertical water turbine generator set according to claim 1, characterized in that: and the head end and the tail end of the O-shaped sealing strip (6) arranged in the groove C (5) are reserved with filling ends, and the groove A (3) and the groove B (4) are filled.

5. The structure for preventing the leakage of the lower oil guide basin of the vertical water turbine generator set according to claim 1, characterized in that: the outer layer of the O-shaped sealing strip (6) is coated with a sealant, and a protective layer is arranged on the outer side of the sealant; the connecting end of the O-shaped sealing strip (6) is a V-shaped opening.

6. The utility model provides a lower frame oil pan which characterized in that: the structure for preventing the leakage of the lower oil guide basin of the vertical water-turbine generator set comprises the structure for preventing the leakage of the lower oil guide basin of the vertical water-turbine generator set, the lower oil guide basin (1), a bearing seat, an upper and a lower tile blocking plates, a cooler (9), a lower guide tile (10), a temperature measuring resistor, an upper cover plate (11), a lower cover plate (2) and an oil blocking barrel (7).