CN205189962U - Flexure strip is used in floated vapor seal area of turbine follow -up and vapor seal structure thereof - Google Patents
Flexure strip is used in floated vapor seal area of turbine follow -up and vapor seal structure thereof Download PDFInfo
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- CN205189962U CN205189962U CN201520974461.9U CN201520974461U CN205189962U CN 205189962 U CN205189962 U CN 205189962U CN 201520974461 U CN201520974461 U CN 201520974461U CN 205189962 U CN205189962 U CN 205189962U
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Abstract
The utility model discloses a flexure strip is used in floated vapor seal area of turbine follow -up and vapor seal structure thereof, including the corresponding elasticity L shape sheetmetal of folding mutually in the same limit of multi -disc, L shape sheetmetal is the serrated edge on one side, vertically can be to the bent arc shape of being of serrated edge side bend thereby the tooth mouth of serrated edge transversely runs through another border of whole serrated edge messenger L shape sheetmetal, between the multi -disc L shape sheetmetal, the tooth mouth and the bits of serrated edge are arranged the position to set up each other and are sheltered from the tooth mouth, another border of L shape sheetmetal vapor seal ring tooth fixes in convex gland ring piece, and the clearance between sealed vapor seal ring tooth of vapor seal ring tooth and the turbine main shaft is stretched out on the serrated edge top, and the sheetmetal serrated edge can reciprocate elasticity downwards and beat behind the atress of top, the utility model discloses simple structure, fine solution turbine main shaft side sealed, utilize the utility model discloses the possible turbine main shaft of elasticity characteristic of sealed flexure strip is complete sealed.
Description
Technical field
The utility model relates to steam turbine, gas turbine field, is specifically related to the servo-actuated floated packing band spring sheet of a kind of turbo machine and gland seal structure thereof.
Background technique
Turbo machine is the motor utilizing fluid impact wheel rotation and produce power.Steam turbine, gas turbine and water turbine can be divided into.It is the power engine being extensively used as generating, aviation, navigation etc.Packing is the steam tight parts of steam turbine in turbo machine, gas turbine, and its object is just the steam sealing steam turbine, gas turbine, improves the utilization ratio of steam.The main shaft steam tight parts of steam turbine, gas turbine are in main shaft radial position, mill is touched in order to prevent sealed member and the dynamic and static of main shaft, gap must be designed with between sealed member and main shaft, gap is too large just exists the problem that Steam loss increases, and the efficiency of steam turbine, gas turbine just reduces.Gap is too little, just easily causes sound friction, causes accident.In order to the two is taken into account, thus introduce sealing gland.
Sealing means traditional in the art has labyrinth gland, honeycomb steam seal, and brush soft tooth packing etc.The sealing principle of labyrinth gland expands to consume steam flow energy by multistage throttle to produce damping, thus reach the object reducing steam clearance leakage vertically.Because between cog is annular cavity, hoop flowing greatly reduces eddy current reduction of speed effect, and its resistance vapour weak effect, amount of leakage is comparatively large, cannot reach required sealing effect.Meanwhile, when labyrinth clearance occurs uneven (being difficult in real work avoid), because amount of leakage is comparatively large, the energy producing exciting is also large, is just difficult to solve, jeopardizes unit safety operation to the steam flow excitation that turbine high-pressure rotor produces once generation.Above sealing means when impact and rub without yielding or retreating mechanism extensive, more easily cause steam turbine shake increase, unit safety is threatened; Brush soft tooth sealing due to brush silk be cylindrical multi-filament array antagonism high-voltage high-speed airflow wash away time easily lodge and braking effect sealing effect.
Summary of the invention
It is all the resistance increasing air-flow around consideration structure shape in seal system, and then realize the leakage stoping high pressure steam, but no matter its effect of which kind of structure is always undesirable, if there is so a kind of packing part, it has flexible function, by air gap completely close to sealing, but not having an impact to the main shaft of steam turbine, gas turbine, will be best scheme.For this reason, the utility model object is to provide the servo-actuated floated packing band spring sheet of a kind of turbo machine and gland seal structure thereof, for be steam turbine, the floated packing band spring sheet of gas turbine and gland seal structure thereof, arrange around turbine shaft and multiple there is flexible sound packing band, significantly can improve the packing effect of steam turbine, gas turbine axle.
To achieve these goals, scheme of the present utility model is:
The servo-actuated floated packing band spring sheet of a kind of turbo machine, it is an elongated metal sheet, wherein, described tinsel forms rectangular L shape along the longitudinal bending of long strip, a limit of described L shape tinsel is the serrated edge alternately formed by multiple tooth mouth and gear piece, and described tooth mouth laterally runs through whole serrated edge thus makes another edge of L shape tinsel can be longitudinally circular shape to serrated edge lateral bend; Described tooth mouth continues to extend opening forward on another limit, the gear piece of serrated edge is suspended at the opening on another limit of internal cause, turbo machine labyrinth clearance, can beat by upper and lower reciprocating elastic.
Scheme is further: described L shape tinsel is 90 degree of right angle L shape tinsels, and described tooth mouth is laterally perpendicular to another limit of tinsel, and described tooth mouth width is less than the width of gear piece.
Scheme is further: the length that described tooth mouth continues to extend forward opening on another limit of tinsel is equal to or greater than 1/2nd of another hem width degree of tinsel.
Scheme is further: described gear piece width is 2mm to 5mm.
Scheme is further: described tooth profile slice tooth mouth is stepped tooth mouth wide at the top and narrow at the bottom, and the setting of the trapezoidal angle of stepped tooth mouth makes its tooth mouth after described another limit of shape tinsel is bent into circular shape, and its stepped tooth mouth deformation is straight shape tooth mouth; Opening on another limit of shape tinsel is the opening of extension forward of the narrow port of stepped tooth mouth.
The servo-actuated floated gland seal structure of a kind of turbo machine, comprise the packing cirque body arranged around main turbine shaft, described packing cirque body is mutually docked by multiple circular arc labyrinth ring block and forms, the internal diameter of described circular arc labyrinth ring block is along the axial labyrinth ring tooth be provided with corresponding to main turbine shaft of main shaft, wherein, described servo-actuated gland seal structure includes multi-disc elongated metal sheet, described tinsel forms rectangular L shape along the longitudinal bending of long strip, a limit of described L shape tinsel is the serrated edge alternately formed by multiple tooth mouth and gear piece, described tooth mouth laterally runs through whole serrated edge thus makes another edge of L shape tinsel can be longitudinally circular shape to serrated edge lateral bend, described tooth mouth continues to extend opening forward on another limit, the gear piece of serrated edge is suspended at the opening on another limit of internal cause, turbo machine labyrinth clearance, can beat by upper and lower reciprocating elastic, multi-disc L shape tinsel same edge correspondence is stacked setting, between multi-disc L shape tinsel, the tooth mouth of serrated edge and gear piece are mutually arranged position to arrange and are sheltered from tooth mouth, described be stacked L shape tinsel is set another edge described in labyrinth ring tooth be fixed in described circular arc labyrinth ring block, wherein, be provided with at least part of length section containing opening on another limit of tinsel in described circular arc labyrinth ring block
suspendspringing space, described in
suspendspringing space allows tinsel serrated edge can beat by reciprocating elastic after top is stressed downwards, the described serrated edge that arranges L shape tinsel of being stacked is met the back side, vapour side at labyrinth ring tooth and is close to labyrinth ring tooth and arranges, and labyrinth ring tooth is stretched out for sealing the gap between labyrinth ring tooth and main turbine shaft in serrated edge top.
Scheme is further: described L shape tinsel is at least two panels, the tooth mouth width of two panels L shape tinsel serrated edge is less than the width of gear piece, and the length that described profile of tooth heel teeth mouth continues to extend forward opening on another limit of tinsel is equal to or greater than 1/2nd of another hem width degree of tinsel.
Scheme is further: described L shape tinsel is that hardness is less than the steel of main turbine shaft hardness or alloyed copper or aluminum alloy spring sheet, and the thickness of described tinsel is 0.2mm to 1mm.
Scheme is further: be provided with protect tooth gear piece in the described back of the body vapour side arranging L shape tinsel serrated edge that is stacked, described in protect tooth gear piece for strengthening the resistance to flexure of packing band tooth profile slice.
Scheme is further: described circular arc labyrinth ring block is provided with a dovetail groove along described labyrinth ring tooth, a packing skeleton matched with dovetail groove is arranged in dovetail groove, described packing skeleton is provided with slot, slot is used for another limit of fixing described L shape tinsel, have recess in the arranged outside of slot, described recess is can the reciprocating elastic space of beating downwards after top is stressed for described tinsel serrated edge.
Its advantage of the contrast of the utility model and prior art is: structure is simple, and well solve the sealing of main turbine shaft side and rotor and stator blade inter-stage, main turbine shaft seals completely to utilize the elastic characteristic of the utility model diaphragm seal to accomplish.
Below in conjunction with drawings and Examples, the utility model is described in detail.
Accompanying drawing explanation
Fig. 1 is the utility model spring sheet structural representation;
Fig. 2 is main turbine shaft end sealing overall structure schematic diagram;
Fig. 3 is circular arc labyrinth ring block schematic diagram;
Fig. 4 is that the utility model suspends servo-actuated gland seal structure schematic diagram;
Fig. 5 is that the utility model two panels spring sheet is stacked decomposing schematic representation;
Fig. 6 is that notch schematic diagram installed by the utility model circular arc labyrinth ring block spring sheet;
Fig. 7 is the utility model circular arc labyrinth ring block oat tail groove structure schematic diagram;
Fig. 8 is the spring sheet mounting structure schematic diagram of the utility model circular arc labyrinth ring block with dovetail groove.
Embodiment
Embodiment 1:
The servo-actuated floated packing band spring sheet of a kind of turbo machine, it is an elongated metal sheet, as shown in Figure 1, described tinsel 1 forms rectangular L shape along the longitudinal bending of long strip, the angle of bending can be 80 degree to 100 degree, described L shape tinsel is thickness is 0.2mm to 1mm, and the best is 0.2mm or 0.5mm; Be stainless steel, alloyed copper, alloy aluminum etc. have flexible tinsel, a limit of described L shape tinsel is the serrated edge 101 alternately formed by multiple tooth mouth 101-1 and gear piece 101-2, and described tooth mouth laterally runs through whole serrated edge thus makes another limit 102 of L shape tinsel longitudinally can be bent into circular shape to profile of tooth avris stressed 2; Described tooth mouth continues to extend forward opening 102-1 on another limit, the gear piece of serrated edge is suspended at the opening on another limit of internal cause, turbo machine labyrinth clearance, can beat by upper and lower reciprocating elastic after its top Vertical Compression.
In embodiment, preferably: described L shape tinsel is bending 90 degree of right angle L shape tinsels, described tooth mouth is laterally perpendicular to another limit of tinsel, and described tooth mouth width is less than the width of gear piece.Described gear piece width is at least 2 times of tooth mouth width.Preferably, described gear piece width is 2mm to 5mm.
In order to make serrated edge have good elasticity up and down, as further preferred version: the length that described tooth mouth continues to extend forward opening on another limit of tinsel is equal to or greater than 1/2nd of another hem width degree of tinsel.
In embodiment: described tooth profile slice tooth mouth is stepped tooth mouth wide at the top and narrow at the bottom, the trapezoidal angle of stepped tooth mouth is different according to different main shaft circularity sizes, the setting of its angle final makes its tooth mouth after described another limit of shape tinsel is bent into circular shape, and its stepped tooth mouth deformation is straight shape tooth mouth; Opening on another limit of shape tinsel is the opening of extension forward of the narrow port of stepped tooth mouth.
Embodiment 2:
The servo-actuated floated gland seal structure of a kind of turbo machine, comprise the packing cirque body arranged around main turbine shaft 3, as shown in Figure 2, described packing cirque body is mutually docked by multiple circular arc labyrinth ring block 4 and forms, be generally 6 circular arc labyrinth ring blocks, as shown in Figure 3 and Figure 4, the internal diameter of described circular arc labyrinth ring block is along the axial labyrinth ring tooth 401 be provided with corresponding to main turbine shaft of main shaft, wherein, described servo-actuated gland seal structure includes the elongated metal sheet described in multi-disc embodiment 1, as shown in Figure 1, described tinsel forms rectangular L shape along the longitudinal bending of long strip, a limit of described L shape tinsel is the serrated edge alternately formed by multiple tooth mouth and gear piece, described tooth mouth laterally runs through whole serrated edge thus makes another edge of L shape tinsel can be longitudinally circular shape to serrated edge lateral bend, described tooth mouth continues to extend opening forward on another limit, the gear piece of serrated edge is suspended at the opening on another limit of internal cause, turbo machine labyrinth clearance, can beat by upper and lower reciprocating elastic after its top Vertical Compression, multi-disc L shape tinsel same edge correspondence is stacked setting, between multi-disc L shape tinsel, the tooth mouth of serrated edge and gear piece are mutually arranged position to arrange and are sheltered from tooth mouth, described multi-disc is stacked another limit 102 arranging L shape tinsel and is fixed in described circular arc labyrinth ring block along described labyrinth ring tooth, wherein, the space 402 that can make serrated edge suspension springing is provided with in described circular arc labyrinth ring block at least part of length section (such as from the center of another hem width degree to serrated edge) containing opening on another limit of tinsel, described springing space allows tinsel serrated edge can beat by reciprocating elastic after top is stressed downwards, described multi-disc is stacked the serrated edge 101 that arranges L shape tinsel and meets the A back side, vapour side at labyrinth ring tooth and be close to labyrinth ring tooth and arrange, labyrinth ring tooth is stretched out on serrated edge top, the part of stretching out is for sealing the gap between labyrinth ring tooth and main turbine shaft, and the gap between usual labyrinth ring tooth and main turbine shaft is between 0.25mm to 0.8mm, therefore, the distance that labyrinth ring tooth is stretched out on serrated edge top can be equal to or slightly less than gap 0.10mm to 0.15mm usually.
In embodiment: described L shape tinsel can have three or 4 according to thickness and actual service conditions situation, but a preferred version is two panels, as shown in Figure 5, between L shape tinsel, the tooth mouth of serrated edge and gear piece are mutually arranged position to arrange and are sheltered from tooth mouth, therefore, the tooth mouth width of two panels L shape tinsel serrated edge is less than the width of gear piece; The length that described profile of tooth heel teeth mouth continues to extend forward opening on another limit of tinsel is equal to or greater than 1/2nd of another hem width degree of tinsel.
In embodiment: because this structure packing band spring sheet is different from traditional gland seal structure, air gap can be sealed completely, such spring sheet top can contact main shaft, because tooth profile slice has elasticity, even if therefore beating appears in main shaft also can not affect sealing, scratch in order to spring sheet can not produce main shaft.Therefore, described L shape tinsel is that hardness is less than the steel of main turbine shaft hardness or alloyed copper or aluminum alloy spring sheet, and the thickness of described tinsel is selected usually at 0.2mm to 1mm, and the best is 0.2mm or 0.5mm.
Preferably: described L shape tinsel is 90 degree of right angle L shape tinsels, described tooth mouth is laterally perpendicular to another limit of tinsel, and described gear piece width is at least 2 times of tooth mouth width.As further preferred version, described gear piece width is 2mm to 5mm.
In embodiment: because the vapor pressure in turbo machine is very high, and spring sheet is not easily selected blocked up, select blocked up meeting elasticity bad.Therefore; usually thinner spring sheet can be selected; in order to strengthen the flex resistance of spring sheet; can be provided with protect tooth gear piece 5 in the described back of the body vapour side arranging L shape tinsel serrated edge that is stacked; the described tooth gear piece that protects is for strengthening the resistance to flexure of packing band tooth profile slice, and its material can select good rigidly in the material of spring sheet.
In embodiment: because spring sheet is a L circular arc-shaped metal sheet, multiple method is installed, as shown in Figure 6, first in circular arc labyrinth ring block along labyrinth ring back of tooth vapour face processing sets up notch 404, its shape rectangular notch as shown in Figure 6, is provided with the slot 404-1 that is inserted another limit of L shape tinsel, right angle in the middle of a side of rectangular notch; Then according to Fig. 4 by another limit of L shape tinsel, right angle of folding and protect tooth gear piece insert; But directly on circular arc labyrinth ring block, mounting and adjusting L shape tinsel is very difficult.Separation method structure installment can be adopted, for the ease of installing and adjustment, therefore, a preferred version of the present embodiment is: as shown in Figure 7, described circular arc labyrinth ring block is provided with a dovetail groove 403 along described labyrinth ring tooth lee face, as shown in Figure 8, a packing skeleton 6 matched with dovetail groove is arranged in dovetail groove, described packing skeleton is provided with slot, slot is used for another limit of fixing described L shape tinsel, recess is had in the arranged outside of slot, described recess is can the reciprocating elastic space of beating downwards after top is stressed for described tinsel serrated edge.In actual operation, first by good to spring sheet and packing Skeleton assembly, the tensioner tent 7 passing through to arrange under triangle circular arc-shaped metal sheet in the process of assembling adjusts the fix tightly soundness on another limit of tinsel.And then insert in the dovetail groove of circular arc labyrinth ring block.
Claims (10)
1. the servo-actuated floated packing band spring sheet of turbo machine, it is an elongated metal sheet, it is characterized in that, described tinsel forms rectangular L shape along the longitudinal bending of long strip, a limit of described L shape tinsel is the serrated edge alternately formed by multiple tooth mouth and gear piece, and described tooth mouth laterally runs through whole serrated edge thus makes another edge of L shape tinsel can be longitudinally circular shape to serrated edge lateral bend; Described tooth mouth continues to extend opening forward on another limit, the gear piece of serrated edge is suspended at the opening on another limit of internal cause, turbo machine labyrinth clearance, can beat by upper and lower reciprocating elastic.
2. packing band spring sheet according to claim 1, it is characterized in that, described L shape tinsel is 90 degree of right angle L shape tinsels, and described tooth mouth is laterally perpendicular to another limit of tinsel, and described tooth mouth width is less than the width of gear piece.
3. packing band spring sheet according to claim 1, it is characterized in that, the length that described tooth mouth continues to extend forward opening on another limit of tinsel is equal to or greater than 1/2nd of another hem width degree of tinsel.
4. packing band spring sheet according to claim 1 or 2 or 3, it is characterized in that, described gear piece width is 2mm to 5mm.
5. packing band spring sheet according to claim 1, it is characterized in that, described tooth profile slice tooth mouth is stepped tooth mouth wide at the top and narrow at the bottom, and the setting of the trapezoidal angle of stepped tooth mouth makes its tooth mouth after another limit of described tinsel is bent into circular shape, and its stepped tooth mouth deformation is straight shape tooth mouth; Opening on another limit of tinsel is the opening of extension forward of the narrow port of stepped tooth mouth.
6. the servo-actuated floated gland seal structure of turbo machine, comprise the packing cirque body arranged around main turbine shaft, described packing cirque body is mutually docked by multiple circular arc labyrinth ring block and forms, the internal diameter of described circular arc labyrinth ring block is along the axial labyrinth ring tooth be provided with corresponding to main turbine shaft of main shaft, it is characterized in that, described servo-actuated gland seal structure includes multi-disc elongated metal sheet, described tinsel forms rectangular L shape along the longitudinal bending of long strip, a limit of described L shape tinsel is the serrated edge alternately formed by multiple tooth mouth and gear piece, described tooth mouth laterally runs through whole serrated edge thus makes another edge of L shape tinsel can be longitudinally circular shape to serrated edge lateral bend, described tooth mouth continues to extend opening forward on another limit, the gear piece of serrated edge is suspended at the opening on another limit of internal cause, turbo machine labyrinth clearance, can beat by upper and lower reciprocating elastic, multi-disc L shape tinsel same edge correspondence is stacked setting, between multi-disc L shape tinsel, the tooth mouth of serrated edge and gear piece are mutually arranged position to arrange and are sheltered from tooth mouth, described be stacked L shape tinsel is set another edge described in labyrinth ring tooth be fixed in described circular arc labyrinth ring block, wherein, be provided with suspension springing space at least part of length section containing opening on another limit of tinsel in described circular arc labyrinth ring block, described suspension springing space allows tinsel serrated edge can beat by reciprocating elastic after top is stressed downwards, the described serrated edge that arranges L shape tinsel of being stacked is met the back side, vapour side at labyrinth ring tooth and is close to labyrinth ring tooth and arranges, and labyrinth ring tooth is stretched out for sealing the gap between labyrinth ring tooth and main turbine shaft in serrated edge top.
7. servo-actuated floated gland seal structure according to claim 6, it is characterized in that, described L shape tinsel is at least two panels, the tooth mouth width of two panels L shape tinsel serrated edge is less than the width of gear piece, and the length that described profile of tooth heel teeth mouth continues to extend forward opening on another limit of tinsel is equal to or greater than 1/2nd of another hem width degree of tinsel.
8. servo-actuated floated gland seal structure according to claim 6, is characterized in that, described L shape tinsel is that hardness is less than the steel of main turbine shaft hardness or alloyed copper or aluminum alloy spring sheet, and the thickness of described tinsel is 0.2mm to 1mm.
9. according to claim 6,7,8 arbitrary described servo-actuated floated gland seal structures, it is characterized in that, be provided with protect tooth gear piece in the described back of the body vapour side arranging L shape tinsel serrated edge that is stacked, described in protect tooth gear piece for strengthening the resistance to flexure of packing band tooth profile slice.
10. servo-actuated floated gland seal structure according to claim 6, it is characterized in that, described circular arc labyrinth ring block is provided with a dovetail groove along described labyrinth ring tooth, a packing skeleton matched with dovetail groove is arranged in dovetail groove, described packing skeleton is provided with slot, slot is used for another limit of fixing described L shape tinsel, has recess in the arranged outside of slot, and described recess is can the reciprocating elastic space of beating downwards after top is stressed for described tinsel serrated edge.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520974461.9U CN205189962U (en) | 2015-12-01 | 2015-12-01 | Flexure strip is used in floated vapor seal area of turbine follow -up and vapor seal structure thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520974461.9U CN205189962U (en) | 2015-12-01 | 2015-12-01 | Flexure strip is used in floated vapor seal area of turbine follow -up and vapor seal structure thereof |
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| CN205189962U true CN205189962U (en) | 2016-04-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105317472A (en) * | 2015-12-01 | 2016-02-10 | 秦皇岛鱼鳞电力设备有限公司 | Elastic sheet for follow-up suspended steam sealing belt of turbine motor and steam sealing structure thereof |
-
2015
- 2015-12-01 CN CN201520974461.9U patent/CN205189962U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105317472A (en) * | 2015-12-01 | 2016-02-10 | 秦皇岛鱼鳞电力设备有限公司 | Elastic sheet for follow-up suspended steam sealing belt of turbine motor and steam sealing structure thereof |
| US10385711B2 (en) | 2015-12-01 | 2019-08-20 | Qinhuangdao Yulin Electric Power Equipment Co., Ltd. | Elastic sheet used for turbine follow-up suspended steam seal belt and steam seal structure thereof |
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