阅读说明：本技术 一种燃气轮机气缸密封法兰 (Gas turbine cylinder sealing flange ) 是由 江剑 于 2021-10-26 设计创作，主要内容包括：本发明涉及燃气轮机技术领域,且公开了一种燃气轮机气缸密封法兰,包括上半气缸、位于上半气缸底部的法兰I、位于上半气缸下方的下半气缸、位于下半气缸顶部的法兰II,所述法兰I靠近上半气缸的一端开设有活动槽,所述法兰I的另一端开设有均布的螺纹孔I。本发明通过设计的储气腔、凹槽体、弹性胶圈、活动槽,使燃气轮机在运行的过程中,气缸内的热量通过热传递至储气腔中,使储气腔内的空气受热膨胀,使弹性胶圈涨大,当上半气缸和下半气缸在热涨中以螺栓为支点发生翘曲时,活动槽的内壁能与第一槽体的外壁紧贴,涨大的弹性胶圈与活动槽的内壁紧贴,从而进行二次补偿密封,避免气缸在多此热涨翘曲时发生泄漏的情况。(The invention relates to the technical field of gas turbines and discloses a gas turbine cylinder sealing flange which comprises an upper half cylinder, a flange I positioned at the bottom of the upper half cylinder, a lower half cylinder positioned below the upper half cylinder and a flange II positioned at the top of the lower half cylinder, wherein a movable groove is formed in one end, close to the upper half cylinder, of the flange I, and threaded holes I are uniformly formed in the other end of the flange I. According to the invention, through the designed gas storage cavity, groove bodies, the elastic rubber ring and the movable groove, in the operation process of the gas turbine, heat in the cylinder is transferred into the gas storage cavity through heat, so that air in the gas storage cavity is heated and expanded, the elastic rubber ring is expanded, when the upper half cylinder and the lower half cylinder are warped by taking the bolt as a fulcrum in thermal expansion, the inner wall of the movable groove can be tightly attached to the outer wall of the first groove body, and the expanded elastic rubber ring is tightly attached to the inner wall of the movable groove, so that secondary compensation sealing is carried out, and the situation that the cylinder leaks when the cylinder is warped due to multiple thermal expansion is avoided.)

1. The utility model provides a gas turbine cylinder sealing flange, includes first cylinder (1), is located flange I (3) of first cylinder (1) bottom, is located lower cylinder (2) of first cylinder (1) below, is located flange II (4) at first cylinder (2) top down, its characterized in that: the flange I (3) is close to one end of the upper half cylinder (1) and is provided with a movable groove (5), the other end of the flange I (3) is provided with uniformly distributed threaded holes I (6), one end of the flange II (4) far away from the lower half cylinder (2) is provided with uniformly distributed threaded holes II (601), the threaded holes II (601) and the threaded holes I (6) form threaded holes, threaded holes are connected with bolts (13) in an inner threaded manner, the center of the bottom of each bolt (13) is provided with a through communication hole (131), the bottom of each bolt (13) is connected with a nut (14) in a threaded manner, one end of the flange II (4) close to the lower half cylinder (2) is provided with a gas storage cavity (7), the top end of the flange II (4) close to the lower half cylinder (2) is fixedly connected with a groove body (10), and the top of the groove body (10) is fixedly connected with an elastic rubber ring (11), the middle part of flange II (4) is seted up air flue I (8) and air flue II (9) of equipartition, flange II (4) are kept away from one end fixedly connected with silk ribbon (12) of lower half cylinder (2).

2. A gas turbine cylinder sealing flange according to claim 1, wherein: the inner cavity of the movable groove (5) is designed to be circular arc at the joint of the side wall and the top wall of the upper half cylinder (1).

3. A gas turbine cylinder sealing flange according to claim 1, wherein: the air storage cavity (7) is filled with saturated air, the groove body (10) is movably sleeved in the movable groove (5), and the center of the groove body (10) is communicated with the air storage cavity (7).

4. A gas turbine cylinder sealing flange according to claim 1, wherein: the groove body (10) comprises a first groove body (101) close to the lower half cylinder (2) and a second groove body (102) with symmetrical positions, the height value of the first groove body (101) is three-fourths of the height value of the second groove body (102), the distance value between one end of the first groove body (101) far away from the second groove body (102) and the side wall of the movable groove (5) close to the lower half cylinder (2) is two millimeters, the distance between the top end of the second groove body (102) and the top end of the movable groove (5) is two millimeters, the distance between one end of the second groove body (102) far away from the first groove body (101) and the side wall of the movable groove (5) close to the threaded hole I (6) is two millimeters, the tops of the first groove body (101) and the second groove body (102) are both designed in an arc shape, and the tops of the ends of the first groove body (101) and the second groove body (102) far away from the center of the groove body (10) are respectively provided with a first step platform (103) and a second step platform (104), two ends of the elastic rubber ring (11) are respectively and fixedly connected with the first stepped platform (103) and the second stepped platform (104).

5. A gas turbine cylinder sealing flange according to claim 1, wherein: the communicating hole (131) is located two millimeters below the air passage I (8), the air passage I (8) and the air passage II (9) are located on the same straight line, one end of the air passage I (8) is communicated with the air storage cavity (7), the other end of the air passage I (8) is communicated with the threaded hole II (601), one end of the air passage II (9) is communicated with the threaded hole II (601), and the other end of the air passage II (9) is communicated with the outside.

6. A gas turbine cylinder sealing flange according to claim 1, wherein: the silk ribbon (12) is located at a port where the air passage II (9) is communicated with the outside, and the color of the silk ribbon (12) is obvious red.

Technical Field

The invention relates to the technical field of gas turbines, in particular to a gas turbine cylinder sealing flange.

Background

The gas turbine uses high-temperature high-pressure gas flowing continuously as working medium to drive the impeller to rotate at high speed, and is mainly an engine which converts the energy in the high-temperature high-pressure gas into electric energy by rotating the impeller, wherein the cylinder of the gas turbine is used as the working area of the impeller, and the high-temperature load and the high-pressure gas load born by the cylinder in the working state are very strong, so the gas turbine is very important for sealing the cylinder.

At present, for the sealing of gas turbine cylinder, mostly adopt the junction of upper and lower half-cylinder to set up flange class part and carry out bolted connection, pretightning force with the bolt makes two flange contact seal, but this kind of mode still can be because of the influence of high temperature high pressure under gas turbine's continuous operation, make upper and lower half-cylinder have the trend of inflation, thereby make the fastening department of bolt become a fulcrum, make upper and lower two flanges warp under the drive of upper and lower half-cylinder, though the warpage can resume automatically after gas turbine stops operating, but in the time, the warpage department will no longer resume because of fatigue, the condition of easy emergence leakage, the bolt that is the fulcrum is simultaneously under many this warpages, therefore take place tensile deformation and creep easily, make bolt fastening power descend, further lead to the leakproofness decline of cylinder.

Disclosure of Invention

Aiming at the defects of the existing gas turbine cylinder flange in the prior art in the use process, the invention provides the gas turbine cylinder sealing flange which has the advantages that when the flange is warped, a movable groove is tightly attached to a first groove body for sealing compensation, an elastic rubber ring for gas expansion is used for elastic compensation, a bolt deforms to enable a gas storage cavity to be communicated with the outside to blow a wire belt to swing, and gas leakage of the gas storage cavity enables the movable groove to be tightly attached to the first groove body and a second groove body to complete secondary sealing compensation.

The invention provides the following technical scheme: a gas turbine cylinder sealing flange comprises an upper half cylinder, a flange I positioned at the bottom of the upper half cylinder, a lower half cylinder positioned below the upper half cylinder, and a flange II positioned at the top of the lower half cylinder, wherein a movable groove is formed in one end, close to the upper half cylinder, of the flange I, a uniformly distributed threaded hole I is formed in the other end of the flange I, a uniformly distributed threaded hole II is formed in one end, far away from the lower half cylinder, of the flange II, the threaded hole II and the threaded hole I form a threaded hole, a bolt is connected in the threaded hole in a threaded manner, a through communication hole is formed in the center of the bottom of the bolt, a nut is connected in the bottom of the bolt in a threaded manner, a gas storage cavity is formed in one end, close to the lower half cylinder, of the flange II, a groove body is fixedly connected at the top of the lower half cylinder, an elastic rubber ring is fixedly connected at the top of the groove body, and uniformly distributed gas passages I and gas passages II are formed in the middle of the flange II, and one end of the flange II, which is far away from the lower half cylinder, is fixedly connected with a ribbon.

Preferably, the inner cavity of the movable groove is designed to be a circular arc at the joint of the side wall and the top wall of the upper half cylinder.

Preferably, the air storage cavity is filled with saturated air, the groove body is movably sleeved in the movable groove, and the center of the groove body is communicated with the air storage cavity.

Preferably, the recess body is including the first cell body and the second cell body of position symmetry that are close to lower cylinder, the height value of first cell body is three fourths of second cell body height value, the one end that the second cell body was kept away from to first cell body and the lateral wall distance value that the activity groove is close to lower cylinder are two millimeters, two millimeters are apart from on the top of second cell body and the top of activity groove, the one end that first cell body was kept away from to the second cell body and the lateral wall that the activity groove is close to screw hole I are two millimeters, the top of first cell body and second cell body is the circular arc design, first step platform and second step platform have been seted up respectively at the one end top that recess body center was kept away from to first cell body and second cell body, the both ends of elastic rubber ring respectively with first step platform and second step platform fixed connection.

Preferably, the communicating hole is located two millimeters below the air flue I, the air flue I and the air flue II are on the same straight line, one end of the air flue I is communicated with the air storage cavity, the other end of the air flue I is communicated with the threaded hole II, one end of the air flue II is communicated with the threaded hole II, and the other end of the air flue II is communicated with the outside.

Preferably, the silk ribbon is positioned at a port where the air passage II is communicated with the outside, and the color of the silk ribbon is prominent red.

The invention has the following beneficial effects:

1. according to the invention, through the designed gas storage cavity, groove bodies, the elastic rubber ring and the movable groove, in the operation process of the gas turbine, heat in the cylinder is transferred into the gas storage cavity through heat, so that air in the gas storage cavity is heated and expanded, the elastic rubber ring is expanded, when the upper half cylinder and the lower half cylinder are warped by taking the bolt as a fulcrum in thermal expansion, the inner wall of the movable groove can be tightly attached to the outer wall of the first groove body, and the expanded elastic rubber ring is tightly attached to the inner wall of the movable groove, so that secondary compensation sealing is carried out, and the situation that the cylinder leaks when the cylinder is warped due to multiple thermal expansion is avoided.

2. According to the invention, through the designed gas storage cavity, the gas passage I, the gas passage II, the bolt and the ribbon, when the bolt at a certain position of the fastening flange is subjected to irreversible elongation deformation and creep deformation due to multiple warping of the cylinder, the bolt at the certain position is in clearance with the threaded hole, so that the gas passage I and the gas passage II are communicated through the clearance between the bolt and the threaded hole and the communication hole on the bolt, and the gas expanded by heating in the gas storage cavity is sprayed out to the outside through the gas passage I and the gas passage II under the pressure difference with the outside, so that the ribbon is influenced by the gas flow and swings to increase the amplitude, thereby reminding a worker of the problem that the bolt at a certain position on the cylinder fails, achieving timely replacement and avoiding leakage of the cylinder.

3. According to the invention, through the design of the height difference between the first groove body and the second groove body and the design that the elastic rubber ring is wrapped on the tops of the first groove body and the second groove body, the bolt at one position has irreversible extension deformation and creep deformation to cause the airtight failure of the gas storage cavity, so that the expansion failure of the elastic rubber ring is caused, and when the opening angles of the flange I and the flange II are larger at the moment, the side wall of the movable groove can be tightly attached to the top of the shorter first groove body, the top wall of the movable groove can be tightly attached to the top of the higher second groove body, and multiple sealing compensation is formed by matching with the elastic rubber ring, so that the condition that the sealing of the cylinder is failed at the moment is avoided.

Drawings

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

FIG. 2 is a schematic structural view of a flange I according to the present invention;

FIG. 3 is a schematic structural view of a flange II according to the present invention;

FIG. 4 is a schematic view of the bolt structure of the present invention;

FIG. 5 is a schematic view of the groove structure of the present invention;

fig. 6 is a schematic structural diagram of an airway I of the present invention.

In the figure: 1. an upper half cylinder; 2. a lower half cylinder; 3. a flange I; 4. a flange II; 5. a movable groove; 6. a threaded hole I; 601. a threaded hole II; 7. a gas storage cavity; 8. an airway I; 9. an airway II; 10. a groove body; 101. a first tank body; 102. a second tank body; 103. a first step platform; 104. a second stair platform; 11. an elastic rubber ring; 12. a ribbon; 13. a bolt; 131. a communicating hole; 14. and a nut.

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.

Referring to fig. 1-3, a gas turbine cylinder sealing flange comprises an upper cylinder half 1, a flange I3 located at the bottom of the upper cylinder half 1, a lower cylinder half 2 located below the upper cylinder half 1, and a flange II4 located at the top of the lower cylinder half 2, wherein a movable groove 5 is formed at one end of the flange I3 close to the upper cylinder half 1, a joint of a side wall and a top wall of an inner cavity of the movable groove 5 close to the upper cylinder half 1 is designed to be an arc, so that when the flange I3 and the flange II4 are warped due to expansion of air pressure and rise of temperature, the flange I3 is lifted upwards to incline the movable groove 5 towards one side away from a vertical line toward a bolt 13, the flange II4 is opened downwards to incline the groove body 10 towards one side away from the vertical line toward one away from the bolt 13, so that the gas expanded by heat in a gas storage cavity 7 presses an elastic rubber ring 11 to expand, and the top of the side wall of the movable groove 5 away from the bolt 13 is tightly attached to the top of a first groove body 101, at the moment, the elastic rubber ring 11 expands towards the movable groove 5 far away from the arc part of the side wall of the bolt 13, so that the elastic rubber ring and the movable groove are flexibly attached to each other, the sealing effect is guaranteed, meanwhile, the rigid contact damage of the elastic rubber ring 11 is also avoided, and the other end of the flange I3 is provided with uniformly distributed threaded holes I6.

Referring to fig. 1, 3 and 5, a gas storage cavity 7 is formed at one end of a flange II4 close to a lower half cylinder 2, saturated air is filled in the gas storage cavity 7, so that gas in the gas storage cavity 7 can be affected by thermal expansion and cold contraction, when the flange I3 and the flange II4 are warped during the operation of the gas turbine, the gas in the gas storage cavity 7 can be heated and expanded, the elastic rubber ring 11 is expanded to complete sealing compensation, meanwhile, when the bolt 13 is subjected to tensile deformation and creep deformation, the position of the communication hole 131 moves upwards, so that the gas storage cavity 7 is communicated with the outside through a gap between the air passage I8, the communication hole 131, the bolt 13 and the threaded hole II601 and the air passage II9, the expanded air in the gas storage cavity 7 is exhausted to the outside, the ribbon 12 outside the air passage II9 is affected by air flow, the swing amplitude is increased, the top end of the flange II4 close to the lower half cylinder 2 is fixedly connected with a groove body 10, the groove body 10 is movably sleeved in the movable groove 5, the top of the groove body 10 is fixedly connected with an elastic rubber ring 11, the center of the groove body 10 is communicated with the air storage cavity 7, so that the air pressure change in the air storage cavity 7 can affect the elastic rubber ring 11, the groove body 10 comprises a first groove body 101 close to the lower half cylinder 2 and a second groove body 102 with symmetrical positions, the height value of the first groove body 101 is three-fourth of the height value of the second groove body 102, when the flange I3 and the flange II4 of the elastic rubber ring 11 warp, the elastic rubber ring 11 always faces the side wall with the arc of the movable groove 5, the expansion of the elastic rubber ring 11 can be matched under the pressure provided by the warp to complete the close sealing compensation, when the flange I3 and the flange II4 warp and the bolt 13 is not damaged, the side wall with the arc of the movable groove 5 can be attached before the first groove body 101 to be matched with the elastic rubber ring 11 to carry out the sealing compensation, when the flange I3 and the flange II4 are damaged and the bolt 13 is damaged, when the elastic rubber ring 11 loses the expansion sealing compensation effect, the side wall of the movable groove 5 with the circular arc can be attached to the first groove body 101, the top wall of the movable groove 5 can be attached to the second groove body 102, the movable groove and the second groove body are matched for sealing compensation, the distance value between the end, away from the second groove body 102, of the first groove body 101 and the side wall, close to the lower half cylinder 2, of the movable groove 5 is two millimeters, the distance value between the top end of the second groove body 102 and the top end of the movable groove 5 is two millimeters, the distance value between the end, away from the first groove body 101, of the second groove body 102 and the side wall, close to the threaded hole I6, of the movable groove 5 and the flange I3 and the flange II4 are warped, the movable space can be reserved when the grooves 10 and the movable groove 5 are rigidly clamped, the warping can only be avoided through the fastening effect in a short time, the problem that the sealing effect cannot be kept for a long time is solved, the tops of the first groove body 101 and the second groove body 102 are both designed circular arcs, the tops of the ends, far away from the centers of the first groove body 101 and the second groove body 102 are respectively provided with the first step flat top of the first step Platform 103 and second step platform 104, the both ends of elastic rubber ring 11 respectively with first step platform 103 and second step platform 104 fixed connection, make the top at first cell body 101 and second cell body 102 of elastic rubber ring 11 cover, when making movable groove 5 and the top contact of first cell body 101 and second cell body 102 seal up the compensation, can pass through the design of top circular arc, flexible contact is accomplished to cooperation elastic rubber ring 11, avoid the damage of rigid contact, further improve the sealed sealing performance of compensation through extrusion elastic rubber ring 11 simultaneously.

Referring to fig. 1 and 3-6, the middle of the flange II4 is provided with an air passage I8 and an air passage II9 which are uniformly distributed, one end of the flange II4, which is far away from the lower half cylinder 2, is provided with a uniformly distributed threaded hole II601, the threaded hole II601 and the threaded hole I6 form threaded holes, the threaded hole is connected with a bolt 13 in a threaded manner, the center of the bottom of the bolt 13 is provided with a through communication hole 131, the communication hole 131 is located two millimeters below the air passage I8, the air passage I8 and the air passage II9 are on the same straight line, one end of the air passage I8 is communicated with the air storage chamber 7, the other end of the air passage I is communicated with the threaded hole II601, one end of the air passage II9 is communicated with the threaded hole II601, and the other end of the air passage II is communicated with the outside, when the bolt 13 is subjected to tensile deformation and creep deformation, the position of the communication hole 131 is moved upwards, the air storage chamber 7 is communicated with the outside through the air passage I8, the gap between the bolt 13 and the threaded hole II601, the air passage II9, and the expanded air in the air storage chamber 7 is exhausted to the outside, the ribbon 12 outside the air passage II9 is affected by air flow, the swing amplitude is increased, the bottom of the bolt 13 is in threaded connection with the nut 14, one end of the flange II4, which is far away from the lower half cylinder 2, is fixedly connected with the ribbon 12, the ribbon 12 is positioned at the port of the air passage II9 communicated with the outside, the color of the ribbon 12 is obvious red, when the expanded air in the air storage cavity 7 is discharged from the air passage II9, the ribbon 12 can be blown to swing by a large margin, the red ribbon 12 can be obviously prompted to a worker, and the bolt is damaged.

The use method (working principle) of the invention is as follows:

firstly, the flange I3 and the flange II4 are fastened and connected through bolts 13 and nuts 14, when the gas turbine runs, the temperature in the cylinder rises linearly, at the moment, the temperature in the cylinder is transmitted into the gas storage cavity 7 through the lower half cylinder 2 and the flange II4, so that air in the gas storage cavity 7 is subjected to thermal expansion, the thermally expanded air expands the elastic rubber ring 11, then the gas turbine runs continuously, and the upper half cylinder 1 and the lower half cylinder 2 are subjected to the influence of high-pressure gas and high temperature, so that the flange I3 and the flange II4 are attached to each other and begin to be subjected to warping separation by taking the bolts 13 as pivots;

then, the flange I3 is lifted upwards, so that the movable groove 5 is inclined towards one side of the bolt 13 away from the vertical line, the flange II4 is opened downwards, the groove body 10 is inclined towards one side away from the bolt 13 away from the vertical line, the top of the side wall of the movable groove 5 away from the bolt 13 is tightly attached to the top of the first groove body 101, at the moment, the elastic rubber ring 11 expands towards the side wall of the movable groove 5 away from the bolt 13, so that the elastic rubber ring and the bolt are tightly attached, and after the gas turbine stops operating, all parts are gradually reset;

finally, when the gas turbine runs for many times, the flange I3 and the flange II4 are attached to each other, and the bolts 13 are used as pivots and are warped and separated, so that when the bolts 13 are subjected to tensile deformation and creep deformation, the positions of the communication holes 131 move upwards, the air storage cavity 7 is communicated with the outside through gaps among the air passages I8, the communication holes 131, the bolts 13 and the threaded holes II601 and the air passages II9, expanded air in the air storage cavity 7 is exhausted to the outside, the ribbon 12 outside the air passages II9 is influenced by air flow, the swing amplitude is increased, the expansion amplitude of the elastic rubber ring 11 is small at the moment, the expansion amplitude of the flange I3 and the expansion amplitude of the flange II4 are large, the top of the side wall of the movable groove 5 far away from the bolts 13 is tightly attached to the top of the first groove body 101, the top wall of the movable groove 5 is tightly attached to the top of the second groove body 102 to complete double sealing compensation, and finally, a worker replaces the damaged bolts 13 in time.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

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 invention, the scope of which is defined in the appended claims and their equivalents.