JPS6064656A - Screw blade of centrifugal separator - Google Patents

Screw blade of centrifugal separator

Info

Publication number
JPS6064656A
JPS6064656A JP16932783A JP16932783A JPS6064656A JP S6064656 A JPS6064656 A JP S6064656A JP 16932783 A JP16932783 A JP 16932783A JP 16932783 A JP16932783 A JP 16932783A JP S6064656 A JPS6064656 A JP S6064656A
Authority
JP
Japan
Prior art keywords
layer
base metal
screw blade
fan
shaped segments
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.)
Granted
Application number
JP16932783A
Other languages
Japanese (ja)
Other versions
JPS6150654B2 (en
Inventor
Masayuki Nishimura
西村 真幸
Kazuki Omori
一樹 大森
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Kakoki Kaisha Ltd
Original Assignee
Mitsubishi Kakoki Kaisha Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Kakoki Kaisha Ltd filed Critical Mitsubishi Kakoki Kaisha Ltd
Priority to JP16932783A priority Critical patent/JPS6064656A/en
Publication of JPS6064656A publication Critical patent/JPS6064656A/en
Publication of JPS6150654B2 publication Critical patent/JPS6150654B2/ja
Granted legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B04CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04BCENTRIFUGES
    • B04B1/00Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles
    • B04B1/20Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles discharging solid particles from the bowl by a conveying screw coaxial with the bowl axis and rotating relatively to the bowl
    • B04B1/2008Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles discharging solid particles from the bowl by a conveying screw coaxial with the bowl axis and rotating relatively to the bowl with an abrasion-resistant conveyor or drum

Landscapes

  • Centrifugal Separators (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)

Abstract

PURPOSE:To enhance the wear resistance property of a screw blade in low cost, by continuously welding a plurality of fan shaped segments, each of which is formed by closely adhereing a sintered hard layer comprising a specific material to a base metal to sinter both of them, to the outer periphery of the screw blade. CONSTITUTION:A base metal 4 is formed by molding a stainless steel plate by mechanical processing and a material, which is formed by cutting felt like fiber cloth obtained by treating a staple fiber comprising soft tungsten carbide with a binder such as glycerine into a predetermined shape, is placed on said base metal 4 as a first layer 6. In the next step, by the similar way as the first layer 6, metal fiber cloth comprising a self-meltable alloy, for example, a nickel-chromium-boron alloy in formed and cut into a predetermined shape to be placed on the first layer 6 as a second layer 7 and the whole is heatd at 1,030-1,100 deg.C in a baking furnace in such a state that both layers 6, 7 are closely adhered to the base metal 4. By this method, a plurality of metallurgically bonded fan shaped segments 3 are welded to a screw blade 2 to obtain a desired product.

Description

【発明の詳細な説明】 本発明は遠心分離機のスフリーラ羽根に関ずろ。[Detailed description of the invention] The present invention relates to a spriller blade for a centrifuge.

例えば、デカンタ型遠心分離機においては、+1Ill
+腺の周りに高速回転する回転円胴に対して、同軸的に
適宜の差速をもって高速回転するスクリュウ羽根を具え
、遠心効果により回転円胴内面に清って集められた汚泥
中の固形分をスクリュウ羽根により濃縮移動して回転円
胴の一端から外部に排出するようにしている。
For example, in a decanter type centrifuge, +1Ill
+ A screw blade that rotates coaxially at high speed with an appropriate differential speed is attached to the rotating cylinder that rotates at high speed around the gland, and the solid content in the sludge is purified and collected on the inner surface of the rotating cylinder by the centrifugal effect. is concentrated and moved by a screw blade and discharged to the outside from one end of the rotating cylinder.

しかしながら、この1重のスクリュウ羽根は高速回転で
汚泥中の固形分と接触して運動する関係−に、7時にそ
の先端部には激しい摩耗を生ずる。
However, since this single screw blade rotates at high speed and moves in contact with the solid content in the sludge, severe wear occurs at its tip at 7 o'clock.

そこで、従来は、その摩耗対策として(1)スフリーラ
羽根の先端部にステライト等の肉盛溶接を施しており、
また(2)予め焼成成型された耐摩耗性のタイルをボル
ト等により機械的に固着又は蝋付等で接着する等の対抗
手段も知ら」tている。
Therefore, in the past, as a countermeasure against this wear, (1) overlay welding of stellite, etc. was applied to the tip of the free roller blade,
(2) Countermeasures are also known, such as mechanically fixing pre-fired and molded wear-resistant tiles with bolts or the like, or bonding them with brazing or the like.

しかしながら(1)では肉盛溶接のだイ)に多くの工数
を要し、しかも均一厚さが得られず、そのために局部的
に大きな摩擦力を受け、硬度もロックウェル硬度約65
以下で必ずしも十分とはいえず、また(2)では蝋付す
る場合は接着強度不足で使用中剥離し事故を起こす惧7
)を力゛・あり、さらに後言己するようにスフリーラ羽
根はrす(゛イ1な形状を有する関係−1−タイルの成
形上+dよびコスト上の問題がある。
However, in (1), a lot of man-hours are required for overlay welding, and a uniform thickness cannot be obtained, which results in localized large frictional forces, and the hardness is approximately 65 on the Rockwell hardness scale.
The following is not necessarily sufficient, and if (2) is used, there is a risk that it may peel off during use due to insufficient adhesive strength and cause an accident.
), and, as I will say later, the spriller blades have a unique shape.

本発明はこのような事情に鑑みて提案されたもので、高
IIII摩耗性かつ低コストのデカンタノ(11遠心分
離機のスクリュウ羽根を提供することを1−1的とする
The present invention has been proposed in view of the above circumstances, and has an object of 1-1 to provide a screw blade for a decantano (11 centrifuge) that is highly abrasive and low in cost.

そのために本発明は、デカンタ型遠心分旨1機に寸dい
て、耐摩耗材の粉末又は繊絹体とこitと41.;れ(
II″が良くベースメタルの融点以下で溶融する自溶性
合金の粉末体又は繊絹体とをi、Jj +1.’1.1
ベースメタル」二に密着焼結して超硬]※を形成すると
ともに該超硬層を上記ベースメタルに冶金学的結合をな
さしめた複数の扇型セグメントを羽根の外周に漬って連
続的に溶接したことを特徴とする。
To this end, the present invention provides a decanter-type centrifugal device with a powder or fibrous body of wear-resistant material and 41. ;Re(
i, Jj +1.'1.1 is a self-fusing alloy powder or silk body that has a good II'' and melts below the melting point of the base metal.
A plurality of fan-shaped segments are continuously sintered on the outer periphery of the blade by closely sintering the base metal to form a carbide]* and metallurgically bonding the carbide layer to the base metal. It is characterized by being welded to.

A〈発明θ片−実施例を図面について説明すると、第1
図はその部分縦断げ11図、第2図は第1図θ月1−I
Iに沿った部分拡大断面図、第3図は第2図の部分拡大
斜視図、第4図は第3図のセグメントのIV −IVに
沿った断面図である。
A〈Invention θ Piece〉Explaining the embodiment with reference to the drawings, the first
The figure is a longitudinal cross-section of that part, Figure 11, and Figure 2 is Figure 1.
FIG. 3 is a partially enlarged perspective view of FIG. 2, and FIG. 4 is a cross-sectional view of the segment of FIG. 3 along IV--IV.

上図において、1は回転円胴、2はステンレス鋼よりな
るスフリーラ羽根、3はスクリュウ羽根2の汚泥を押出
す側の面上に外周に治って連続的に溶接される本発明に
係る複数の耐摩耗性扇型セグメント、4はステンレス鋼
よりなる扇型ベースメタル、5は扇型セグメント4の外
側側面および端面(C渚って焼結形成さ」1.た■7字
状断面を有する超硬層、6は耐摩耗の材、例えばタング
ステンカーバイドの第1層、7は第1層6の−にに重ね
て作られる自溶性合金、例えばニッケルクロムボロンの
第2層で、6および7が焼結されて超硬層5を形成し、
4および5が一体と1.仁って扇型セグメント3を形成
する。8オ6よひ9ばそれぞれ扇型ベースメタル4をス
クリュウ羽根2に溶接する溶接部である。
In the above figure, 1 is a rotary cylinder, 2 is a stainless steel spriller blade, and 3 is a plurality of screw blades according to the present invention that are continuously welded to the outer periphery on the sludge extrusion side surface of the screw blade 2. Wear-resistant fan-shaped segment, 4 is a fan-shaped base metal made of stainless steel, 5 is an outer side surface and an end surface of the fan-shaped segment 4 (formed by sintering). The hard layer 6 is a first layer of wear-resistant material, e.g. tungsten carbide, 7 is a second layer of a self-fusing alloy, e.g. nickel chromium boron, made over the first layer 6, 6 and 7 are sintered to form a cemented carbide layer 5;
4 and 5 together and 1. In this way, a fan-shaped segment 3 is formed. 8, 6, and 9 are welding parts where the fan-shaped base metal 4 is welded to the screw blade 2, respectively.

このような構造において、扇状セグメント3は下記の要
領で作ることができる。
In such a structure, the fan-shaped segment 3 can be made in the following manner.

+1ψ(質のタングステンカーバイドの短繊維を電IL
I(のタングステンフィラメントの製法と同様の製法で
作り、この短繊維をグリセリン等のバインダて処理して
フェルト状の繊維布とし、同1子の蟹領て自溶性合金例
えばニッケルクロノ、ボロン合金の金属繊維布を作る。
+1ψ (Electric IL of high quality tungsten carbide short fibers
The short fibers are made using the same manufacturing method as the tungsten filament of I (I), and the short fibers are treated with a binder such as glycerin to make a felt-like fiber cloth. Make metal fiber cloth.

ベースメタル4はステンレス鋼板を機械加工して成形し
、この上に第1層6としてタングステンカーバイド繊維
布を所定の形状に切1θ11〜だものを載せ、その上に
第2層7としてニッケルクロムボロン金属繊維布を所定
の形状に明断したものを載せ、ベースメタルに密ス6し
た状態で焼成炉にて1030〜1100′η〕で加熱す
る。
The base metal 4 is formed by machining a stainless steel plate, and on top of this, a tungsten carbide fiber cloth cut into a predetermined shape 1θ11 is placed as the first layer 6, and on top of this, a nickel chromium boron material is placed as the second layer 7. A metal fiber cloth cut into a predetermined shape is placed on the base metal and heated in a firing furnace at a temperature of 1030 to 1100'η.

そ5才ろと、自溶性合金ニッケルクロムボロンの第2層
7は溶融しタングステンカーバイドの第1層6の繊維間
に浸透してこれと拡散1=j・1を形成し、液相焼結が
進行し、自溶性合金7はベースメタル/IK達すると、
そこに冶金学的結合層を形成し、タングステンカーバイ
ド/ニッケルクロj、ボロンの超硬焼結層をベースメタ
ル4に融着せしめる。
At around 5 years of age, the second layer 7 of the self-fusing alloy nickel chromium boron melts and penetrates between the fibers of the first layer 6 of tungsten carbide, forming a diffusion 1=j・1 with it, resulting in liquid phase sintering. progresses and when self-fusing alloy 7 reaches base metal/IK,
A metallurgical bonding layer is formed thereon, and a cemented carbide sintered layer of tungsten carbide/nickel carbon and boron is fused to the base metal 4.

こS、で、タングステンカーバイド繊維の厚さとニッケ
ルクロムボロンの繊維の厚さを変えることによる成分比
の変化と、形成後の超硬層の厚さを変えることにより所
定の形状と性状の扇型セグメント3をイ、[9ろことか
できる。
In this S, by changing the component ratio by changing the thickness of the tungsten carbide fiber and the thickness of the nickel chromium boron fiber, and by changing the thickness of the cemented carbide layer after formation, a fan shape with a predetermined shape and properties can be obtained. Segment 3 can be written as ``a'' or ``9''.

こ〜で、超硬層5を焼成するに当って、ニッケルクロム
ボロン繊翔−を第1層としタングステンカーバイド繊維
を第2層としてもよく、また各層に繊維を使用する代わ
りにそれぞれの粉末を使用し、適宜の型枠でその周囲を
囲繞した状態で焼結するようにしてもよく、その際ニッ
ケルクロムボロン粉末を第1層にタングステンカーバイ
ド粉末を第2層として散布してもよく、また両粉末を混
合したものを散布してもよい。
When firing the carbide layer 5, nickel chromium boron fibers may be used as the first layer and tungsten carbide fibers may be used as the second layer, or instead of using fibers in each layer, each powder may be used. The nickel chromium boron powder may be used as a first layer and the tungsten carbide powder may be sprinkled as a second layer. A mixture of both powders may be sprayed.

このようにして成型さ、)]、た複数の扇型セグメント
3をそれぞれその円弧状内端において溶接部8でスフリ
ーラ羽根2に溶接するととも(・入 スクリ・つ羽根2
の外周にて(容接部9てスクリュウ羽根2に溶接する。
In this way, the plurality of fan-shaped segments 3 are welded to the freewheel blade 2 at the welding part 8 at their arcuate inner ends.
(Welded to the screw blade 2 at the welding part 9.

スクリ・−ウ羽根2はらせん面を有するとともに、その
夕1径が、第1図に示すように、軸方向にil″fっで
徐々に小さくなっているので、1、i1!’I”、セグ
メント3は1個1個若干形状を異にしたべ、のが必要で
あるが、ベースメタル4はステンレス鋼板で作られてい
るので、その機械加工は比較的容易に行なうことができ
る。
The screw blade 2 has a helical surface, and its diameter gradually decreases in the axial direction as shown in FIG. Although each segment 3 needs to have a slightly different shape, since the base metal 4 is made of a stainless steel plate, its machining can be performed relatively easily.

このようにして作られた扇型セグメント3のベースメタ
ル4はスフリーラ羽根2と同質の(」質で作られるので
、その溶接は強固なものとなり、ベースメタル/I1.
に焼成された超硬層3の硬度はロックウェル硬度で68
程度どなるので、十分大きな耐摩耗性を発揮することが
てきる。
Since the base metal 4 of the fan-shaped segment 3 made in this way is made of the same quality as the freewheel blade 2, the welding thereof is strong, and the base metal/I1.
The hardness of the carbide layer 3 fired is 68 on the Rockwell hardness scale.
Depending on the degree of wear resistance, sufficiently high wear resistance can be exhibited.

なす((、ベースメタル4としては、スクリュウ羽根2
を形成するステンレス鋼と超硬層5との中間的性質を有
する材料を使用することもできろ。
Eggplant ((, as base metal 4, screw blade 2
It is also possible to use a material having intermediate properties between the stainless steel forming the carbide layer 5 and the cemented carbide layer 5.

このような構造+/rCよれば、下記の効果が奏せられ
る。
According to such a structure +/rC, the following effects can be achieved.

(1)超硬層は複!xKI=な形状のベースメタル上に
も焼成することができろ。
(1) The carbide layer is complex! It should be possible to fire on a base metal with a shape of xKI=.

(2)超硬層ば、ベースメタル上で焼成されので、累月
として金属繊維を使用する場合は、焼成枠型が不要であ
る。
(2) Since the carbide layer is fired on the base metal, a firing frame is not required when using metal fiber as the layer.

(3)ベースメタルと一体的に焼成するので、超硬層と
ベースメタル間の蝋イヌ1は不要である。
(3) Since it is fired integrally with the base metal, the wax dog 1 between the carbide layer and the base metal is unnecessary.

(4)ステライト等による肉盛り溶接よりも高硬度で緻
密な組織が得られ、スラリ3−9羽根の耐用命数を著し
く伸ばすことができる。
(4) A harder and denser structure can be obtained than build-up welding using stellite or the like, and the service life of the slurry 3-9 blade can be significantly extended.

蟹するに本発明によ1・1.ば、デカンタ型遠心分離機
において、酬摩粍材の粉末体又は繊維体とこれと濡れ性
が良くベースメタルの融点」ユ下で溶融刊−ろ自溶性合
金の粉末体又は繊維体とを扇型ベースメタル」二に密M
焼結して超硬層を形成するとともに該超硬層を上記べ一
フ、ノタル1/こ冶金学的結合をなさし1)た複数の1
:4’、:i l(’jセグノントを羽根の外周に泪っ
て連続的に溶灰したことにより、長寿命の遠心分前機の
スクリュウ羽根を得るから、本発明は産縮七極めて有益
なものである。
According to the present invention, 1.1. For example, in a decanter-type centrifugal separator, powder or fibers of a swarm material and powders or fibers of a self-fusing alloy with good wettability and melting at a temperature below the melting point of the base metal are combined. Type base metal ``Ninimushi M
A plurality of 1) are sintered to form a carbide layer, and the carbide layer is metallurgically bonded to the base and 1).
:4', :i l('j By pouring segmentont onto the outer periphery of the blade and continuously dissolving the ash, a long-life screw blade for a centrifugal preparator is obtained, so the present invention is extremely useful for production reduction. It is something.

11ツ]:i’+iの簡I11′lな1脱明24′口図
は本発明の一実施例を示す部分縦断面図、第2図は第1
図のIT−IIに清った1llj分慝ノ〈断面図、第3
図は第2図の部分拡大斜視図、第4図は2113図のセ
グメントの]\j〜■\’l/iZ浴った断面図である
11]: i'+i simple I11'l 1.24' Exit view is a partial vertical cross-sectional view showing one embodiment of the present invention, and Fig.
1llj section clear to IT-II in Figure 3
The figure is a partially enlarged perspective view of FIG. 2, and FIG. 4 is a cross-sectional view of the segment of FIG.

1・・・回転円胴、2・・−スクリュウ羽根、:3・・
114 ”l’!セグメント、4 ベースメタル、5 
・、[召映層、6 第1層、7・・・第2層、8,0 
・溶接部。
1...Rotating cylinder, 2...-screw blade, :3...
114 "l'! segment, 4 base metal, 5
・、[Showing layer, 6 1st layer, 7...2nd layer, 8,0
·welded part.

代叩人 井埋士 塚 本 正 文 手続補正書 昭和99年f月/ρ日 特許庁長官 殿 ) 1、事件の表示 昭和58年特 許 願第169327号3 補正をする
者 11件との関係用[i人 住 所 東京都千代田区丸の内二丁目6番2号氏 名(
名称)二菱化工機株式会社 4、代理人 −勃→
Substitute person Masashi Ibuji Tsukamoto Procedural amendment written by the Commissioner of the Japan Patent Office (February 1989/1989) 1. Indication of the case Patent Application No. 169327 of 1983 3 Relationship with the person making the amendment 11 cases Address: 2-6-2 Marunouchi, Chiyoda-ku, Tokyo Name (
Name) Nisubishi Kakoki Co., Ltd. 4, Agent - Eki →

Claims (1)

【特許請求の範囲】[Claims] デカンタ型遠心分離機において、耐摩耗材の粉末体又は
繊維体とこれと濡れ性が良くベースメタルの融点以下で
溶融する自溶性合金の粉末体又は繊維体とを扇型ベース
メタル」二に密着焼結して超硬層を形成するとともに該
超硬層を上記ベースメタルに冶金学的結合をなさしめた
複数の扇型セグメントを羽根の外周に清って連続的に溶
接したことを特徴とする遠心分離機のスフリーラ羽根。
In a decanter-type centrifuge, a powder or fiber of a wear-resistant material and a powder or fiber of a self-fusing alloy that has good wettability and melts below the melting point of the base metal are closely sintered onto a fan-shaped base metal. A plurality of fan-shaped segments are bonded together to form a carbide layer and the carbide layer is metallurgically bonded to the base metal, and a plurality of fan-shaped segments are neatly and continuously welded to the outer periphery of the blade. Sfreera blades of a centrifuge.
JP16932783A 1983-09-16 1983-09-16 Screw blade of centrifugal separator Granted JPS6064656A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16932783A JPS6064656A (en) 1983-09-16 1983-09-16 Screw blade of centrifugal separator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16932783A JPS6064656A (en) 1983-09-16 1983-09-16 Screw blade of centrifugal separator

Publications (2)

Publication Number Publication Date
JPS6064656A true JPS6064656A (en) 1985-04-13
JPS6150654B2 JPS6150654B2 (en) 1986-11-05

Family

ID=15884488

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16932783A Granted JPS6064656A (en) 1983-09-16 1983-09-16 Screw blade of centrifugal separator

Country Status (1)

Country Link
JP (1) JPS6064656A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6229716A (en) * 1985-07-30 1987-02-07 Honda Motor Co Ltd 2-cycle engine exhaust timing control device
JPS6259155U (en) * 1985-09-13 1987-04-13
EP0893188A3 (en) * 1997-07-22 1999-08-18 United Technologies Corporation Process for joining metallic members together

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6229716A (en) * 1985-07-30 1987-02-07 Honda Motor Co Ltd 2-cycle engine exhaust timing control device
JPS6259155U (en) * 1985-09-13 1987-04-13
EP0893188A3 (en) * 1997-07-22 1999-08-18 United Technologies Corporation Process for joining metallic members together
EP1439022A3 (en) * 1997-07-22 2004-08-04 United Technologies Corporation Process for joining metallic members together

Also Published As

Publication number Publication date
JPS6150654B2 (en) 1986-11-05

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