CN211951428U - Sealing strip and sealing structure of floating ring of water turbine - Google Patents
Sealing strip and sealing structure of floating ring of water turbine Download PDFInfo
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- CN211951428U CN211951428U CN202020550631.1U CN202020550631U CN211951428U CN 211951428 U CN211951428 U CN 211951428U CN 202020550631 U CN202020550631 U CN 202020550631U CN 211951428 U CN211951428 U CN 211951428U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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Abstract
The utility model discloses a hydraulic turbine floating ring sealing strip and seal structure, the utility model provides a sealing strip has increased sealing area, seals water, seals oily effect better, and the sealing strip can not roll the extrusion by a wide margin in the floating ring when the floating ring up-and-down motion in addition, has reduced the risk of fracture damage because of the floating ring up-and-down motion, has not only improved sealed effect, still increase of service life, in addition, the utility model provides a O shape structure that traditional sealing strip adopted has been given up to the sealing strip, when having avoided the floating ring up-and-down motion, deformation can take place for the sealing strip, and self winding leads to excessive wearing and tearing and the problem of leaking, further improvement sealed effect.
Description
Technical Field
The utility model relates to a sealed technical field of hydraulic turbine, concretely relates to hydraulic turbine floating ring seal strip and seal structure.
Background
With the development of the water turbine manufacturing industry, various forms of floating ring sealing structures, such as a carbon seal, a flat plate seal, a hydraulic seal and the like, are developed in succession. The carbon sealing is not popularized due to the reasons that the structure is complex, the processing is difficult, the performance of a carbon blank can be ensured only by graphitization treatment, the manufacturing cost is high and the like; the flat plate sealing is applied more, but the rubber flat plate of some power stations can be replaced about two years, and the water leakage is large when the rubber is aged or broken, so that a good sealing effect cannot be achieved; although hydraulic sealing is used more for a while, water leakage is caused by the deformation of a spring, the inflexible guide mechanism, improper material selection and the like, and a good sealing effect cannot be achieved; the old rubber asbestos packing is sealed, and the shaft is required to be adjusted at any time and ground, so that the old rubber asbestos packing is less adopted.
Although the sealing structure is different, the sealing is realized by pressing two opposite sliding surfaces together by means of normal force (spring force, gravity or water pressure) of the opposite sliding surfaces to keep the two opposite sliding surfaces in solid contact.
The sealing structure of the floating ring of the water turbine is mostly a circle of O-shaped rubber strip, sealing is realized by a relative sliding surface, the sealing form is simple, the sealing effect is also good as long as the sealing structure is installed in place, and the following defects exist: the sealing strip can not be guaranteed to be in a natural state during sealing, when the floating ring moves up and down, the sealing strip is easy to deform and wind, water leakage is increased after the rubber strip is excessively abraded, the sealing strip is easy to damage during the up and down movement of the floating ring, leakage is caused, and the safe and stable operation of the unit is seriously influenced.
SUMMERY OF THE UTILITY MODEL
In order to solve the easy deformation winding that current floating ring adopted "O" shape rubber strip to exist, lead to the problem that the increase of wearing and tearing leaked, the utility model aims to provide a can make the sealing strip be in natural state when sealed, and reduce hydraulic turbine floating ring sealing strip and seal structure of the damage of sealing strip simultaneously.
The utility model discloses the technical scheme who adopts does:
in a first aspect, the utility model provides a water turbine floating ring sealing strip, which comprises a sliding contact part, a sealing contact part and an elastic part;
the two ends of the sliding contact part are respectively fixed with the sealing contact part, and each sealing contact part is respectively parallel to the central axis of the sliding contact part;
one end of the sealing contact part, which is far away from the end part of the sliding contact part on the corresponding side, is fixedly connected with the elastic part;
the included angle between the elastic part and the end part of the corresponding side sealing contact part is an acute angle, and the two elastic parts form a V-shaped structure or an arc-shaped structure.
Based on the above disclosure, the present invention is provided with two elastic portions, and the two elastic portions are in an arc structure or a V-shaped structure, when the sealing strip is installed in the floating ring, the arc structure or the V-shaped structure formed by the two elastic portions can be a deformation portion, and when the floating ring moves up and down, the deformation occurs, so as to ensure that the two elastic portions can contact with the inside of the floating ring, and will not roll in the floating ring, and ensure that the sealing strip still has a good sealing effect when the floating ring moves up and down; meanwhile, the elastic part is arranged, so that the contact area between the elastic part and the floating ring is increased, the sealing area is increased, and the water and oil sealing effects are better; additionally, because the utility model provides a O shape structure of traditional sealing strip has been given up to the sealing strip, makes the utility model provides a sealing strip can not take place self winding when the floating ring up-and-down motion, has avoided the sealing strip to lead to the problem of leaking because of excessive wearing and tearing, has still improved the life of sealing strip simultaneously, has reduced the cost of maintenance and change.
In one possible embodiment, a bend is also provided between each sealing contact and the end of the corresponding sliding contact, wherein the angle between each bend and the end of the corresponding sliding contact is obtuse. Through the above disclosure, the bent part is arranged between the connecting part of the sealing contact part and the sliding contact part, and the included angle between the bent part and the sliding contact part is set to be an obtuse angle, which is equivalent to a section of round angle, so that the sealing strip can be conveniently and quickly installed in the floating ring, and the installation convenience is greatly increased.
In one possible design, the included angle between each bent portion and the end of the corresponding side sliding contact portion is between 110 ° and 160 °.
In one possible design, a bent portion is further provided between each sealing contact portion and the end of the corresponding sliding contact portion, wherein the bent portion is an arc-shaped structure bent toward the axis in the sliding contact portion. Through the disclosure, the arc-shaped bent part is equivalent to that a round angle is formed at two ends of the sliding contact part, so that the sealing strip can be conveniently and rapidly installed in the floating ring, and the installation convenience is greatly improved.
In one possible design, when the two elastic parts form a V-shaped structure, the included angle of the V-shaped structure is between 50 and 80 degrees. Through the above disclosure, the included angle of the V-shaped structure is limited, so that the problem that the two elastic parts cannot contact the inner wall of the floating ring when the floating ring moves up and down due to the fact that the V-shaped included angle is small can be avoided, and the good sealing effect of the sealing strip is guaranteed when the floating ring moves up and down.
In one possible design, when the two elastic portions 3 form an arc-shaped structure, the arc degree of the arc-shaped structure is between
In the meantime.
Through the above disclosure, the radian of the limited arc-shaped structure is consistent with the effect of the intersection angle of the limited V-shaped structure, so that the problem that the two elastic parts cannot contact the inner wall of the floating ring when the floating ring moves up and down due to the larger radian can be avoided, and the good sealing effect of the sealing strip is ensured when the floating ring moves up and down.
In one possible design, the two elastic portions, the two sealing contact portions, and the two bending portions are respectively symmetrically disposed along a central axis of the sliding contact portion. Through the design, the stability of the whole sealing strip in sealing can be ensured, and the problem of uneven sealing of the sealing strip in sealing due to the asymmetrical structure is prevented.
In one possible design, the sliding contact portion, the elastic portion, the sealing contact portion, and the bent portion are integrally formed as the floating seal strip of the water turbine. Through the above disclosure, the sealing strip is manufactured in an integrated forming manner, so that the sealing strip is uniform in material, stress concentration is avoided, the sealing strip is broken and damaged, and the service life is prolonged.
In one possible design, the sliding contact portion, the sealing contact portion, the elastic portion, and the bending portion are all made of nitrile rubber.
In a second aspect, the utility model provides a sealing structure of a floating ring of a water turbine, which comprises a floating ring 5 and the sealing strip of the floating ring of the water turbine of the first aspect;
the sealing contact part of the sealing strip of the floating ring of the water turbine is respectively abutted against the inner side wall of the floating ring, and the sliding contact part is in sliding contact with the surface of the sealing box cover, so that the floating ring and the sealing box cover form a sliding sealing structure.
The utility model has the advantages that:
(1) the utility model relates to a hydraulic turbine floating ring sealing strip and seal structure, the utility model provides a sealing strip has increased sealed area relatively, seals water, seals oily effect better, and the sealing strip can not roll the extrusion by a wide margin in the floating ring when the floating ring up-and-down motion in addition, has reduced the risk of fracture damage because of the floating ring up-and-down motion, has not only improved sealed effect, still increase of service life, in addition, the utility model provides a O shape structure that traditional sealing strip adopted has been given up to the sealing strip, when having avoided the floating ring up-and-down motion, the sealing strip can take place self winding and lead to excessive wearing and tearing and the problem of leaking, further improvement sealed effect.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic cross-sectional structure diagram of a first structure of a floating ring sealing strip of a water turbine provided by the present invention.
Fig. 2 is a schematic cross-sectional structure diagram of a second structure of the floating ring sealing strip of the water turbine provided by the present invention.
Fig. 3 is a schematic cross-sectional structure diagram of a third structure of the floating ring sealing strip of the water turbine provided by the present invention.
Fig. 4 is a schematic cross-sectional structure diagram of a fourth structure of the floating ring sealing strip of the water turbine provided by the present invention.
Fig. 5 is a schematic structural diagram of the floating ring sealing structure of the water turbine provided by the present invention.
Reference numeral, 1-a sliding contact portion; 2-sealing the contact; 3-an elastic part; 4-bending part; 5-a floating ring; 6-sealing the box cover.
Detailed Description
The invention will be further described with reference to the accompanying drawings and specific embodiments. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. Specific structural and functional details disclosed herein are merely illustrative of example embodiments of the invention. The present invention may, however, be embodied in many alternate forms and should not be construed as limited to the embodiments set forth herein.
It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of example embodiments of the present invention.
It should be understood that, for the term "and/or" as may appear herein, it is merely an associative relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, B exists alone, and A and B exist at the same time; for the term "/and" as may appear herein, which describes another associative object relationship, it means that two relationships may exist, e.g., a/and B, may mean: a exists independently, and A and B exist independently; in addition, for the character "/" that may appear herein, it generally means that the former and latter associated objects are in an "or" relationship.
It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments of the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises," "comprising," "includes" and/or "including," when used herein, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, numbers, steps, operations, elements, components, and/or groups thereof.
Example one
As shown in fig. 1-2, the floating ring sealing strip for a water turbine provided by the present embodiment includes a sliding contact portion 1, a sealing contact portion 2, and an elastic portion 3.
The two ends of the sliding contact part 1 are respectively fixed with the sealing contact parts 2, and each sealing contact part 2 is respectively parallel to the central axis of the sliding contact part 1.
One end of the sealing contact part 2 far away from the end part of the corresponding sliding contact part 1 is fixedly connected with the elastic part 3.
The included angle between the elastic part 3 and the end part of the corresponding side sealing contact part 2 is an acute angle, and the two elastic parts 3 form a V-shaped structure or an arc-shaped structure.
As shown in fig. 1 and 2, fig. 1 is a schematic cross-sectional structure of the sealing tape when the two elastic portions 3 form a V-shaped structure, and fig. 2 is a schematic cross-sectional structure of the sealing tape when the two elastic portions 3 form an arc-shaped structure.
The concrete structure of the floating ring sealing strip of the water turbine is described as follows:
the sliding contact part 1 serves as a contact part of the sealing strip with the sealing box cover 6, namely, when the sealing strip is installed in the floating ring 5, the sliding contact part 1 is in contact with the surface of the sealing box cover 6.
The sealing contact part 2 is used as a sealing part of the sealing strip, when the sealing strip is installed in the floating ring 5, the sealing contact part 2 is abutted against the inner side wall of the floating ring 5, and the sealing effect of the floating ring 5 is achieved.
The elastic parts 3 are respectively arranged at the end parts of the two sealing contact parts 2 far away from the sliding contact part 1, and the two elastic parts 3 form a V-shaped structure or an arc-shaped structure, through the design, the V-shaped structure or the arc-shaped structure formed by the two elastic parts 3 can deform when the floating ring 5 moves up and down, so that the two elastic parts 3 can be ensured to be in contact with the inner wall of the floating ring 5 and cannot roll in the floating ring 5, and the sealing strip is ensured to still have a good sealing effect when the floating ring 5 moves up and down; meanwhile, the elastic part 3 is arranged, the contact area between the sealing strip and the floating ring 5 is increased, the sealing area is further increased, and the water and oil sealing effects are better.
And set up the contained angle between elastic component 3 and the 2 tip of corresponding side seal contact portion and be the acute angle, can guarantee the V-arrangement structure or the arc structure that two elastic component 3 formed, all be towards the inside bending of sealing strip, when the floating ring 5 moves from top to bottom, guarantee the sealed effect of sealing strip.
As shown in fig. 1, in the present embodiment, when the two elastic portions 3 form a V-shaped structure, the included angle of the V-shaped structure is between 50 ° and 80 °. Through the included angle of the V-shaped structure formed by limiting the two elastic parts 3, the problem that the two elastic parts 3 cannot contact the inner wall of the floating ring 5 when the floating ring 5 moves up and down due to the fact that the V-shaped included angle is small can be avoided, and the sealing strip still has a good sealing effect when the floating ring 5 moves up and down.
In the present embodiment, the angle of the V-shaped structure can be, but is not limited to, 60 °.
In the present embodiment, as shown in fig. 2, when the two elastic portions 3 form an arc structure, the arc degree of the arc structure is between
In the meantime.
Through the radian of injecing the arc structure, its effect is the same with the effect of injecing V-arrangement structure contained angle, can avoid because of the radian is great, when the upper and lower motion of floating ring 5, the unable problem of contacting the inner wall of floating ring 5 of two elastic parts 3 has guaranteed that floating ring 5 still has good sealed effect when the upper and lower motion.
In the present embodiment, the arc of the arc structure can be, but is not limited to, the arc
In this embodiment, in order to improve the convenience of attaching the weather strip, a bent portion is further provided between the sliding contact portion 1 and the seal contact portion 2, and the following is provided:
as shown in fig. 1 and 2, a bent portion 4 is further provided between each sealing contact portion 2 and the end of the corresponding sliding contact portion 1, wherein an included angle between each bent portion 4 and the end of the corresponding sliding contact portion 1 forms an obtuse angle.
Through the design, the bent part 4 is arranged between the connecting part of the sealing contact part 2 and the sliding contact part 1, the included angle between the bent part 4 and the sliding contact part 2 is set to be an obtuse angle, which is equivalent to that one section of round angle is arranged at the two ends of the sliding contact part 1, so that the sealing strip can be rapidly installed in the floating ring, and the installation convenience is greatly improved.
In the present embodiment, an included angle between each bent portion 4 and the end of the corresponding side sliding contact portion 1 is, for example, 110 ° to 160 °. Specifically, but not limited to, 130 °.
In the present embodiment, the two elastic portions 3, the two sealing contact portions 2, and the two bent portions 4 are respectively disposed symmetrically along the central axis of the sliding contact portion 1. As shown in FIG. 1, the dotted line in FIG. 1 is the central axis, and by the design, the stability of the whole sealing strip during sealing can be ensured, and the problem of uneven sealing of the sealing strip during sealing caused by asymmetric structure can be prevented.
In this embodiment, the sliding contact portion 1, the elastic portion 3, the sealing contact portion 2 and the bent portion 4 are integrally formed to form the floating seal strip of the water turbine. Through adopting integrated into one piece's mode, can guarantee that the sealing strip material is even, avoid appearing stress concentration, lead to the problem that the sealing strip breaks and damages, and then improved the life of sealing strip.
In this embodiment, for example, the sliding contact portion 1, the sealing contact portion 2, the elastic portion 3 and the bending portion 4 may be, but not limited to, made of nitrile rubber, that is, the entire floating seal ring of the water turbine is made of nitrile rubber.
The nitrile rubber is prepared from butadiene and acrylonitrile by an emulsion polymerization method, is mainly produced by a low-temperature emulsion polymerization method, and has the advantages of excellent oil resistance, higher wear resistance, better heat resistance and strong bonding force. The nitrile rubber is mainly used for manufacturing oil-resistant rubber products. NBR, a synthetic rubber made by copolymerizing butadiene and acrylonitrile. The rubber is a synthetic rubber with better oil resistance (especially alkane oil) and aging resistance. The acrylonitrile-butadiene rubber contains 42-46% acrylonitrile, 36-41% acrylonitrile, 31-35% acrylonitrile, 25-30% acrylonitrile, 18-24% acrylonitrile and the like. It can be used in 120 deg.C air or 150 deg.C oil for a long period. In addition, the sealing strip has good water resistance, air tightness and excellent bonding performance, and can completely meet the use requirements of the sealing strip in water or oil.
To sum up, the hydraulic turbine floating ring sealing strip that adopts this embodiment to provide can increase sealing area, seals water, seals oil effect better, and the sealing strip can not roll the extrusion by a wide margin in floating ring 5 when the up-and-down motion of floating ring 5 in addition, has reduced the risk of because of the fracture damage of floating ring 5 up-and-down motion, has not only improved sealed effect, increase of service life, in addition, the utility model provides a O shape structure that traditional sealing strip adopted has been abandoned to the sealing strip, when having avoided the up-and-down motion of floating ring 5, deformation can take place for the sealing strip, and self winding leads to excessive wearing and tearing and the problem of leaking, further improvement sealed effect.
Example two
As shown in fig. 3, the present embodiment provides another structure of the sealing strip for a floating ring of a hydraulic turbine, which is different from the first embodiment in that when two elastic portions 3 are V-shaped, the bent portions are arc-shaped.
As shown in fig. 4, a bent portion 4 is further disposed between each sealing contact portion 2 and the end of the corresponding sliding contact portion 1, wherein the bent portion 4 is an arc-shaped structure bent toward a central axis of the sliding contact portion 1.
In this embodiment, kink 4 is the arc structure, and the effect that its played is unanimous with the effect in embodiment one, also has set up one section fillet in sliding contact portion 1's both ends mutually promptly, and the quick installation that can be convenient for the sealing strip is in the floating ring, great increase the convenience of installation.
The technical effects of the structures of the other components in this embodiment are the same as those in the first embodiment, and are not described herein again.
EXAMPLE III
As shown in fig. 4, the present embodiment provides another structural schematic diagram of the floating ring sealing strip of the hydraulic turbine, which is different from the first embodiment in that: two elastic part 3 are the arc structure, and the kink is the arc structure.
In this embodiment, under the condition that two elastic part 3 formed the arc structure, kink 4 also was the arc structure, and the effect that its played is unanimous with the effect in embodiment one, also has set up one section fillet in sliding contact portion 1's both ends promptly mutually, can be convenient for the quick installation of sealing strip in the floating ring, great increase the convenience of installation.
The technical effects of the structures of the other components in this embodiment are the same as those in the first embodiment, and are not described herein again.
Example four
As shown in fig. 5, the present embodiment provides a sealing structure including the sealing strip of the floating ring of the hydraulic turbine in the first embodiment, the second embodiment and the third embodiment, and further includes a floating ring 5, wherein the sealing contact portions 2 of the sealing strip of the floating ring of the hydraulic turbine respectively abut against the inner side walls of the floating ring 5, and the sliding contact portions 1 are in sliding contact with the surface of the sealing cover 6, so that the floating ring 5 and the sealing cover 6 form a sliding sealing structure.
The sealing structure of this embodiment is a structure formed by installing the sealing strip of the floating ring of the water turbine into the floating ring 5 according to any one of the first embodiment, the second embodiment and the third embodiment, and the technical effects achieved by the sealing structure are consistent with those of the first embodiment, and are not described herein again.
The present invention is not limited to the above-mentioned optional embodiments, and any other products in various forms can be obtained by anyone under the teaching of the present invention, and any changes in the shape or structure thereof, all the technical solutions falling within the scope of the present invention, are within the protection scope of the present invention.
Claims (10)
1. The utility model provides a hydraulic turbine floating ring sealing strip which characterized in that: comprises a sliding contact part (1), a sealing contact part (2) and an elastic part (3);
the two ends of the sliding contact part (1) are respectively fixed with the sealing contact parts (2), and each sealing contact part (2) is respectively parallel to the central axis of the sliding contact part (1);
one end of the sealing contact part (2) far away from the end part of the corresponding side sliding contact part (1) is fixedly connected with the elastic part (3);
the included angle between the elastic part (3) and the end part of the corresponding side sealing contact part (2) is an acute angle, and the two elastic parts (3) form a V-shaped structure or an arc-shaped structure.
2. The water turbine floating ring seal strip according to claim 1, wherein: a bending part (4) is further arranged between each sealing contact part (2) and the end part of the corresponding side sliding contact part (1), wherein an included angle between each bending part (4) and the end part of the corresponding side sliding contact part (1) forms an obtuse angle.
3. The water turbine floating ring seal strip according to claim 2, wherein: the included angle between each bent part (4) and the end part of the corresponding sliding contact part (1) is between 110 and 160 degrees.
4. The water turbine floating ring seal strip according to claim 1, wherein: still be equipped with kink (4) between every sealed contact portion (2) and the tip that corresponds side sliding contact portion (1), wherein, kink (4) are towards the crooked arc structure of sliding contact portion (1) axis.
5. The water turbine floating ring seal strip according to claim 1, wherein: when the two elastic parts (3) form a V-shaped structure, the included angle of the V-shaped structure is between 50 and 80 degrees.
6. The water turbine floating ring seal strip according to claim 1, wherein: when the two elastic parts (3) form an arc structure, the radian of the arc structure is between
In the meantime.
7. The water turbine floating ring seal strip according to claim 2, wherein: the two elastic parts (3), the two sealing contact parts (2) and the two bending parts (4) are symmetrically arranged along the central axis of the sliding contact part (1) respectively.
8. The water turbine floating ring seal strip according to claim 2, wherein: the sliding contact part (1), the elastic part (3), the sealing contact part (2) and the bending part (4) are integrally formed to form the water turbine floating sealing strip.
9. The water turbine floating ring seal strip according to claim 2, wherein: the sliding contact part (1), the sealing contact part (2), the elastic part (3) and the bending part (4) are all made of nitrile rubber.
10. A sealing structure of a floating ring of a water turbine is characterized by comprising the floating ring (5) and the sealing strip of the floating ring of the water turbine as claimed in any one of claims 1 to 9;
the sealing contact part (2) of the sealing strip of the floating ring of the water turbine is respectively abutted against the inner side wall of the floating ring (5), and the sliding contact part (1) is in sliding contact with the surface of the sealing box cover (6), so that the floating ring (5) and the sealing box cover (6) form a sliding sealing structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020550631.1U CN211951428U (en) | 2020-04-14 | 2020-04-14 | Sealing strip and sealing structure of floating ring of water turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020550631.1U CN211951428U (en) | 2020-04-14 | 2020-04-14 | Sealing strip and sealing structure of floating ring of water turbine |
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| Publication Number | Publication Date |
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| CN211951428U true CN211951428U (en) | 2020-11-17 |
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| CN202020550631.1U Active CN211951428U (en) | 2020-04-14 | 2020-04-14 | Sealing strip and sealing structure of floating ring of water turbine |
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| CN (1) | CN211951428U (en) |
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Address after: No.7 Tianyun Road, high tech Zone, Chengdu, Sichuan 610000 Patentee after: Guoneng Daduhe maintenance and installation Co.,Ltd. Address before: No.7 Tianyun Road, high tech Zone, Chengdu, Sichuan 610000 Patentee before: GUODIAN DADUHE MAINTENANCE & INSTALLATION Co.,Ltd. |
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