JPH08254199A - Mounting structure of wear resisting piece - Google Patents
Mounting structure of wear resisting pieceInfo
- Publication number
- JPH08254199A JPH08254199A JP5870895A JP5870895A JPH08254199A JP H08254199 A JPH08254199 A JP H08254199A JP 5870895 A JP5870895 A JP 5870895A JP 5870895 A JP5870895 A JP 5870895A JP H08254199 A JPH08254199 A JP H08254199A
- Authority
- JP
- Japan
- Prior art keywords
- wear
- resistant piece
- resistant
- mounting structure
- piece
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、例えば石炭焚きボイラ
のガス再循環ファン、焼結炉の排煙ファンなどエロージ
ョンを誘起する流体を扱う回転流体機械やエロージョン
を誘起する媒体を高流速で流す配管、ダクト、ケーシン
グなどに適用される耐摩耗片の取付け構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary fluid machine that handles fluids that induce erosion, such as a gas recirculation fan for a coal-fired boiler and a smoke exhaust fan for a sintering furnace, and a medium that induces erosion at a high flow rate. The present invention relates to a wear-resistant piece mounting structure applied to pipes, ducts, casings, and the like.
【0002】[0002]
【従来の技術】図3は石炭焚きボイラのガス再循環ファ
ン(GRF)の羽根などに施工されている従来の耐摩耗
片の取付け構造の説明図である。図において、従来の耐
摩耗片の取付け構造はガス再循環ファンのロータ1に固
定されている羽根2の前面にライナ4をボルト3により
取付け、このライナ4の表面に形成される断面が台形状
の複数本の蟻溝5内に断面が台形状をなすセラミックス
製の耐摩耗片6を互いに接して挿入し、これらセラミッ
クス製の耐摩耗片6の動きをばね7で蟻溝5の軸方向に
制限するとともに、セラミックス製の耐摩耗片6をばね
8で蟻溝5に押し付けて動きを吸収するようにしてい
る。図における符号2aは羽根2の左右に設けられ、羽
根2を支持する主板である。2. Description of the Related Art FIG. 3 is an explanatory view of a conventional wear-resistant piece mounting structure which is installed on a blade of a gas recirculation fan (GRF) of a coal-fired boiler. In the figure, a conventional wear-resistant piece attachment structure is such that a liner 4 is attached to the front surface of a blade 2 fixed to a rotor 1 of a gas recirculation fan by a bolt 3, and a cross section formed on the surface of the liner 4 is trapezoidal. The wear-resistant pieces 6 made of ceramics having a trapezoidal cross section are inserted into the plurality of dovetail grooves 5 in contact with each other, and the movements of the wear-resistant pieces 6 made of ceramics are moved by the springs 7 in the axial direction of the dovetail grooves 5. In addition to the limitation, the wear resistant piece 6 made of ceramics is pressed against the dovetail groove 5 by the spring 8 to absorb the movement. Reference numeral 2a in the drawing is a main plate which is provided on the left and right of the blade 2 and supports the blade 2.
【0003】[0003]
【発明が解決しようとする課題】上記のように、従来の
耐摩耗片の取付け構造においては台形状をなすセラミッ
クス製の耐摩耗片6をライナ4を介して取付けるように
しているため、構成部品の点数、種類が多く、その製
作、組立てなどに多大なコストを要している。また、耐
摩耗片6の一部が破損した場合でも、その蟻溝5内に埋
め込まれている総ての耐摩耗片6を一旦解放して再組立
てする必要があり、メンテナンスに多大な時間を要して
いる。このような複雑な耐摩耗片の取付け構造に代え、
仮に羽根2の前面に直方体状の各セラミックス製の耐摩
耗片を直接スタッド溶接ピンで取付ける構造にした場合
は、エロージョン媒体がセラミックス製の耐摩耗片の表
面を流動しながらスタッド溶接ピンも摩耗させて耐摩耗
片の固定効果が無くなるために信頼性に乏しく、重要な
機器、エロージョンを誘起する流体量の多い機器などに
は使用することができない。As described above, in the conventional wear-resistant piece attachment structure, the trapezoidal ceramic wear-resistant piece 6 is attached through the liner 4, so that the component parts are formed. There are many points and types, and it requires a great deal of cost to manufacture and assemble them. Further, even if a part of the wear-resistant piece 6 is damaged, it is necessary to once release all the wear-resistant pieces 6 embedded in the dovetail groove 5 and reassemble them, which requires a great deal of time for maintenance. I need it. Instead of such a complicated wear resistant piece mounting structure,
If the ceramics wear-resistant piece of rectangular parallelepiped is directly attached to the front surface of the blade 2 by the stud welding pin, the erosion medium flows on the surface of the wear-resistant piece made of ceramic and wears the stud welding pin as well. Since the effect of fixing the wear resistant piece is lost, reliability is poor, and it cannot be used for important equipment, equipment having a large amount of fluid that induces erosion, and the like.
【0004】[0004]
【課題を解決するための手段】本発明に係る耐摩耗片の
取付け構造は上記課題の解決を目的にしており、流体の
流れに対峙する前面から頂部にかけて形成され流れを上
記頂部方向へ飛散させる傾斜面を有して被摩耗面を覆う
耐摩耗片と、該耐摩耗片の上記頂部よりも下流側に頭部
を上記頂部よりも低く装着され上記耐摩耗片を上記被摩
耗面に取付けるスタッドピンとを備えた構成を特徴とす
る。SUMMARY OF THE INVENTION The wear-resistant piece mounting structure according to the present invention is intended to solve the above-mentioned problems, and is formed from the front surface facing the flow of fluid to the top, and scatters the flow toward the top. A wear-resistant piece having an inclined surface and covering the wear-resistant surface, and a stud for mounting the wear-resistant piece on the wear-resistant surface by mounting a head on the downstream side of the wear-resistant piece with the head lower than the top. It is characterized by a configuration including a pin.
【0005】[0005]
【作用】即ち、本発明に係る耐摩耗片の取付け構造にお
いては、流体の流れに対峙する前面から頂部にかけて形
成され流れを頂部方向へ飛散させる傾斜面を有して被摩
耗面を覆う耐摩耗片の頂部よりも下流側にスタッドピン
が頭部を頂部よりも低く装着され耐摩耗片を被摩耗面に
取付けるようになっており、エロージョンを誘起する流
体が耐摩耗片の前面に形成されている傾斜面に衝突して
頂部方向に飛散することにより頂部よりも下流の摩耗が
減少する。That is, in the wear-resistant piece mounting structure according to the present invention, the wear-resistant piece having an inclined surface formed from the front surface facing the flow of the fluid to the top and scattering the flow toward the top, covers the wear surface. A stud pin is attached to the downstream side of the top of the piece so that the head is lower than the top so that the wear-resistant piece is attached to the surface to be worn, and the fluid that induces erosion is formed on the front surface of the wear-resistant piece. By colliding with the inclined surface and scattering toward the top, the wear downstream of the top is reduced.
【0006】[0006]
【実施例】図1は本発明の一実施例に係る耐摩耗片の取
付け構造の説明図、図2は本発明の他の実施例に係る耐
摩耗片の取付け構造の説明図である。図において、これ
らの実施例に係る耐摩耗片の取付け構造は例えば石炭焚
きボイラのガス再循環ファン、焼結炉の排煙ファンなど
エロージョンを誘起する流体を扱う回転流体機械やエロ
ージョンを誘起する媒体を高流速で流す配管、ダクト、
ケーシングなどに使用されるもので、耐摩耗性を向上さ
せるためにセラミックス製、或いは超硬合金製などの耐
摩耗片11を流路の摩耗し易い表面にスタッド溶接によ
り取付けるようになっており、このような場合は特にス
タッド自身の摩耗を防ぐことが重要である。DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an explanatory view of a wear resistant piece mounting structure according to an embodiment of the present invention, and FIG. 2 is an explanatory view of a wear resistant piece mounting structure according to another embodiment of the present invention. In the drawings, the mounting structure of the wear-resistant piece according to these examples is, for example, a gas recirculation fan of a coal-fired boiler, a smoke exhaust fan of a sintering furnace, a rotary fluid machine that handles fluids that induce erosion, or a medium that induces erosion. Pipes, ducts,
Used for casings, etc., wear-resistant pieces 11 made of ceramics or cemented carbide for improving wear resistance are attached by stud welding to the easily worn surface of the flow path. In such a case, it is important to prevent the stud itself from wearing.
【0007】図1において、本耐摩耗片の取付け構造は
石炭焚きボイラのガス再循環ファン(GRF)の羽根に
施工されており、従来の複雑な耐摩耗片の取付け構造に
代えて図に示すように羽根2の前面に複数のセラミック
ス製の耐摩耗片11を直接それぞれのスタッド溶接ピン
12で取付ける構造になっている。このセラミックス製
の耐摩耗片11はエロージョンを誘起する流体を耐摩耗
片11の上り方向へ飛散させるように緩やかな傾斜面1
1aを耐摩耗片11の前面11cから頂部11bへ到る
まで設け、頂部11bから若干後流側へずれた位置にス
タッド溶接ピン12をその頭部が頂部11bよりも低く
なるように取付けて流体が入り難くなっている。なお、
耐摩耗片11の強度は低くなるが、図2に示すように耐
摩耗片11の形状を前面11c上部に傾斜面11aを有
しながらスタッド溶接ピン12を取付ける部分をL字型
に切欠いてスタッド溶接ピン12の頭部がこの切欠き部
内に耐摩耗片11の高さhよりも低く納まるような形状
にしてもよい。In FIG. 1, the wear-resistant piece mounting structure is constructed on the blades of a gas recirculation fan (GRF) of a coal-fired boiler, and is shown in the figure instead of the conventional complicated wear-resistant piece mounting structure. As described above, a plurality of wear-resistant pieces 11 made of ceramics are directly attached to the front surface of the blade 2 by the respective stud welding pins 12. The wear-resistant piece 11 made of ceramics has a gentle slope 1 so that the fluid that induces erosion is scattered in the upward direction of the wear-resistant piece 11.
1a is provided from the front surface 11c of the wear-resistant piece 11 to the top portion 11b, and the stud welding pin 12 is attached at a position slightly deviated from the top portion 11b to the downstream side so that its head is lower than the top portion 11b. Is difficult to enter. In addition,
Although the strength of the wear-resistant piece 11 is low, as shown in FIG. 2, the shape of the wear-resistant piece 11 has an inclined surface 11a at the upper portion of the front surface 11c, and the portion for mounting the stud welding pin 12 is cut out into an L-shape to form the stud. The welding pin 12 may have a shape such that the head portion of the welding pin 12 is lower than the height h of the wear-resistant piece 11 in the cutout portion.
【0008】このように、エロージョンを誘起する流体
がスタッド溶接ピン12の頭部に流れて来難いようにす
るとともに、セラミックス製の耐摩耗片11で障壁を作
ってスタッド溶接ピン12を保護することにより、エロ
ージョンを誘起する流体はセラミック製の耐摩耗片11
前面11c上部の傾斜面11aの上り斜面に衝突して上
方向に飛散し、エロージョンを誘起する流体が耐摩耗片
11の表面を流れた後にスタッド溶接ピン12の頭部に
到ってピン頭部を摩耗させることがない。また、下流へ
行くのに従って流れの速度も減少して摩耗が減少する。In this way, it is difficult for the fluid that induces erosion to flow to the head of the stud welding pin 12, and the stud welding pin 12 is protected by forming a barrier with the wear-resistant piece 11 made of ceramics. As a result, the fluid that induces erosion is a wear-resistant piece 11 made of ceramic.
The fluid that collides with the upward slope of the inclined surface 11a above the front surface 11c and scatters upward and flows the erosion-induced fluid to the head of the stud welding pin 12 after reaching the head of the stud welding pin 12 Does not wear. Further, as the flow goes downstream, the flow velocity also decreases and wear decreases.
【0009】従来の耐摩耗片の取付け構造においては台
形状をなすセラミックス製の耐摩耗片をライナを介して
取付けるようにしているため、構成部品の点数、種類が
多く、その製作、組立てなどに多大なコストを要してい
る。また、耐摩耗片の一部が破損した場合でも、その蟻
溝内に埋め込まれている総ての耐摩耗片を一旦解放して
再組立てする必要があり、メンテナンスに多大な時間を
要している。このような複雑な耐摩耗片の取付け構造に
代え、仮に羽根の前面に直方体状の各セラミックス製の
耐摩耗片を直接スタッド溶接ピンで取付ける構造にした
場合は、エロージョン媒体がセラミックス製の耐摩耗片
の表面を流動しながらスタッド溶接ピンも摩耗させて耐
摩耗片の固定効果が無くなるために信頼性に乏しく、重
要な機器、エロージョンを誘起する流体量の多い機器な
どには使用することができないが、本取付け構造におい
ては耐摩耗片11に前面11cから上部の頂部11bに
至るエロージョンを誘起する流体を耐摩耗片11上方向
へ飛散させる緩やかな傾斜面11aを持たせるととも
に、耐摩耗片11にスタッド溶接ピン12の穴を設ける
位置を頂部11bよりも若干下流側にずれた点でスタッ
ド溶接ピン12の頭部が頂部11bよりも低くなるよう
にして流体が入り難くし、スタッド溶接ピン12の上流
側にスタッドピン12摩耗の防護壁として機能する耐摩
耗性に優れたセラミックス製の耐摩耗片11の壁を形成
しており、このような各耐摩耗片11を直接スタッド溶
接ピン12により羽根2の前面に溶接して取付け、羽根
2表面のエロージョンを防止している。これにより、従
来の耐摩耗片の取付け構造と比較してライナ、ボルト、
ばねなどが不要になって部品点数が低減され、材料費、
機械加工費、取付け工数などが低減する。また、耐摩耗
片11の補修時に同一の蟻溝に組み込まれた総ての耐摩
耗片を一旦解放して再復旧する必要がなく、補修費が低
減する。また、スタッド溶接ピン12の摩耗も少なく信
頼性が向上するとともに、エロージョンを誘起する流体
を羽根2の表面から離す方向に飛散させることにより下
流の耐摩耗片11の寿命も伸びる。In the conventional wear-resistant piece mounting structure, since the trapezoidal ceramic wear-resistant piece is mounted via the liner, the number and types of the components are large, and the manufacture and assembly thereof are difficult. It costs a lot of money. Even if a part of the wear-resistant piece is damaged, all the wear-resistant pieces embedded in the dovetail groove need to be released and reassembled, which requires a lot of time for maintenance. There is. If instead of such a complicated wear-resistant piece mounting structure, the wear resistance piece made of ceramics in the shape of a rectangular parallelepiped is directly attached to the front surface of the blade by the stud welding pin, the erosion medium will not wear out. Since the stud welding pin is worn while flowing on the surface of the piece and the effect of fixing the wear-resistant piece is lost, reliability is poor and it cannot be used for important equipment or equipment with a large amount of fluid that induces erosion. However, in the present mounting structure, the wear-resistant piece 11 has a gentle inclined surface 11a that scatters the fluid that induces erosion from the front surface 11c to the top 11b of the upper part to the wear-resistant piece 11 in the upward direction. The head of the stud welding pin 12 is located at the point where the hole for the stud welding pin 12 is slightly shifted downstream from the top 11b. The wall of the wear-resistant piece 11 made of ceramics having excellent wear resistance is formed on the upstream side of the stud welding pin 12 so as to prevent the fluid from entering, and functions as a protection wall against wear of the stud pin 12. Each of the wear-resistant pieces 11 is directly welded to the front surface of the blade 2 by the stud welding pin 12 so as to prevent erosion on the surface of the blade 2. As a result, liners, bolts, and
No springs are required, the number of parts is reduced, material cost,
Machining cost and installation man-hours are reduced. Further, when repairing the wear-resistant piece 11, it is not necessary to once release all the wear-resistant pieces assembled in the same dovetail groove and restore them again, and the repair cost is reduced. Further, the stud welding pin 12 is less worn and the reliability is improved, and the life of the downstream wear-resistant piece 11 is extended by scattering the fluid that induces erosion in the direction away from the surface of the blade 2.
【0010】[0010]
【発明の効果】本発明に係る耐摩耗片の取付け構造は前
記のように構成されており、耐摩耗片の頂部よりも下流
の摩耗が減少するので、スタッドピンが摩耗しないとと
もに下流の耐摩耗片の寿命が伸びる。The mounting structure for the wear resistant piece according to the present invention is constructed as described above, and the wear on the downstream side of the top of the wear resistant piece is reduced, so that the stud pin does not wear and the wear resistant on the downstream side. The life of the piece is extended.
【図1】図1(a)は本発明の一実施例に係る耐摩耗片
の取付け構造の正面図、同図(b)は同図(a)におけ
るB部斜視図、同図(c)は耐摩耗片の取付け説明図、
同図(d)はその作用説明図である。FIG. 1 (a) is a front view of a wear-resistant piece mounting structure according to an embodiment of the present invention, FIG. 1 (b) is a perspective view of part B in FIG. 1 (a), and FIG. 1 (c). Is an explanatory diagram of the wear resistant piece installation,
FIG. 6D is an explanatory diagram of its operation.
【図2】図2は本発明の他の実施例に係る耐摩耗片の取
付け構造の正面図である。FIG. 2 is a front view of a wear-resistant piece mounting structure according to another embodiment of the present invention.
【図3】図3は従来の耐摩耗片の取付け構造の斜視図で
ある。FIG. 3 is a perspective view of a conventional wear-resistant piece attachment structure.
【図4】図4(a)は図3におけるA−A矢視断面図、
同図(b)はその耐摩耗片の斜視図、同図(c)は図3
におけるC−C矢視断面図である。4 (a) is a sectional view taken along line AA in FIG.
3B is a perspective view of the wear-resistant piece, and FIG.
FIG. 9 is a cross-sectional view taken along the line CC in FIG.
1 ロータ 2 羽根 11 耐摩耗片 11a 傾斜面 11b 頂部 11c 前面 12 スタッド溶接ピン DESCRIPTION OF SYMBOLS 1 rotor 2 blade 11 wear-resistant piece 11a inclined surface 11b top part 11c front surface 12 stud welding pin
Claims (1)
けて形成され流れを上記頂部方向へ飛散させる傾斜面を
有して被摩耗面を覆う耐摩耗片と、該耐摩耗片の上記頂
部よりも下流側に頭部を上記頂部よりも低く装着され上
記耐摩耗片を上記被摩耗面に取付けるスタッドピンとを
備えたことを特徴とする耐摩耗片の取付け構造。1. A wear-resistant piece having an inclined surface formed from a front surface facing a fluid flow to a top portion to scatter the flow toward the top portion, and covering the wear-resistant surface; A wear resistant piece mounting structure comprising: a stud pin for mounting the wear resistant piece on the surface to be worn, the head being mounted lower than the top on the downstream side.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5870895A JPH08254199A (en) | 1995-03-17 | 1995-03-17 | Mounting structure of wear resisting piece |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5870895A JPH08254199A (en) | 1995-03-17 | 1995-03-17 | Mounting structure of wear resisting piece |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH08254199A true JPH08254199A (en) | 1996-10-01 |
Family
ID=13092007
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5870895A Withdrawn JPH08254199A (en) | 1995-03-17 | 1995-03-17 | Mounting structure of wear resisting piece |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH08254199A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113864247A (en) * | 2021-08-30 | 2021-12-31 | 华能秦煤瑞金发电有限责任公司 | Auxiliary mounting equipment for wear-resistant ceramic wafers |
-
1995
- 1995-03-17 JP JP5870895A patent/JPH08254199A/en not_active Withdrawn
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113864247A (en) * | 2021-08-30 | 2021-12-31 | 华能秦煤瑞金发电有限责任公司 | Auxiliary mounting equipment for wear-resistant ceramic wafers |
CN113864247B (en) * | 2021-08-30 | 2023-06-20 | 华能秦煤瑞金发电有限责任公司 | Auxiliary installation equipment for wear-resistant ceramic plates |
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Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20020604 |