JPS6361378B2 - - Google Patents
Info
- Publication number
- JPS6361378B2 JPS6361378B2 JP8404379A JP8404379A JPS6361378B2 JP S6361378 B2 JPS6361378 B2 JP S6361378B2 JP 8404379 A JP8404379 A JP 8404379A JP 8404379 A JP8404379 A JP 8404379A JP S6361378 B2 JPS6361378 B2 JP S6361378B2
- Authority
- JP
- Japan
- Prior art keywords
- rotor
- crankshaft
- less
- bearing
- steadite
- 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.)
- Expired
Links
- 229910001018 Cast iron Inorganic materials 0.000 claims description 17
- 239000012530 fluid Substances 0.000 claims description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 5
- 229910001562 pearlite Inorganic materials 0.000 claims description 5
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 3
- 229910052796 boron Inorganic materials 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 229910000734 martensite Inorganic materials 0.000 claims description 3
- 238000010791 quenching Methods 0.000 claims description 3
- 230000000171 quenching effect Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 description 21
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 9
- 229910002804 graphite Inorganic materials 0.000 description 8
- 239000010439 graphite Substances 0.000 description 8
- 206010010904 Convulsion Diseases 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 238000007789 sealing Methods 0.000 description 5
- 239000003921 oil Substances 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 239000010687 lubricating oil Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 229910052580 B4C Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- INAHAJYZKVIDIZ-UHFFFAOYSA-N boron carbide Chemical compound B12B3B4C32B41 INAHAJYZKVIDIZ-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910001567 cementite Inorganic materials 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- KSOKAHYVTMZFBJ-UHFFFAOYSA-N iron;methane Chemical compound C.[Fe].[Fe].[Fe] KSOKAHYVTMZFBJ-UHFFFAOYSA-N 0.000 description 1
- 239000003350 kerosene Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- -1 special steadite Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
Landscapes
- Details And Applications Of Rotary Liquid Pumps (AREA)
Description
【発明の詳細な説明】
本発明は回転式流体ポンプのロータ、クランク
軸、軸受に関し、耐摩耗性に優れ、かつシール性
生産性に優れたものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rotor, a crankshaft, and a bearing of a rotary fluid pump, which have excellent wear resistance and excellent sealing productivity.
回転式流体ポンプは第１図、第２図に示す如く
円筒形状シリンダ１内のベーン２及びベーンと摺
動する円筒形状ロータ３によりポンプ室が形成さ
れており、ロータ３はロータ３の中心と偏心して
回転する回転軸４２とロータボス穴と嵌合し回転
摺動するボス部４１とを有するクランク軸４によ
り回転される。又クランク軸４は軸受５により支
承されている。 As shown in FIGS. 1 and 2, the rotary fluid pump has a pump chamber formed by a vane 2 inside a cylindrical cylinder 1 and a cylindrical rotor 3 that slides on the vane. It is rotated by a crankshaft 4 having a rotating shaft 42 that rotates eccentrically and a boss portion 41 that fits into a rotor boss hole and rotates and slides thereon. Further, the crankshaft 4 is supported by a bearing 5.
近年回転式流体ポンプに高出力、高回転数化が
望まれ、それに伴いシリンダ、ベーン、ロータ材
も多くの改良がなされてきたが、シリンダ、ベー
ン、ロータ材に比しクランク軸、軸受材料は通常
の鋼、鋳鉄が使用されており、以下の欠点を有す
るものであつた。 In recent years, there has been a desire for higher output and higher rotational speeds for rotary fluid pumps, and many improvements have been made to cylinder, vane, and rotor materials. Conventional steel and cast iron have been used, and they have the following drawbacks:
即ち、これら材料は摩耗した場合にポンプの性
能、特にシール性が劣化するばかりでなく、焼き
付きの問題より耐摩耗性、潤滑性が要求されてい
るが、高出力化、あるいはロータ材の高硬度化に
より、耐摩耗性、潤滑性が不足するものである。
又軸受材に焼結合金やメタル材を使用した場合流
体の漏れが多く、流体用のシールが必要となるば
かりでなく、軸受自体の潤滑方法も特殊なものが
必要であつた。 In other words, when these materials wear out, they not only deteriorate the performance of the pump, especially the sealing properties, but also require wear resistance and lubricity to avoid seizure problems. Due to this, wear resistance and lubricity are insufficient.
Furthermore, when a sintered alloy or metal material is used as the bearing material, fluid leakage occurs frequently, requiring not only a seal for the fluid, but also a special method of lubricating the bearing itself.
本発明はかかる欠点を解決するものであり、ク
ランク軸、軸受の摩耗量が少なく、かつ潤滑性が
ありシール性が高く、又加工性にも優れる組合わ
せを提供するものである。 The present invention solves these drawbacks, and provides a combination of a crankshaft and a bearing that has less wear, has good lubricity, has high sealing properties, and has excellent workability.
本発明の要旨とするところは以下の３つの材料
の組合わせにある。 The gist of the present invention lies in the combination of the following three materials.
即ちロータは重量比でTC3.00〜3.60％、Si1.50
〜2.50％、Mn0.50〜1.00％、P0.30％以下、
Cr0.50〜1.00％、Ni0.15〜0.25％、Mo0.25％以
下、B0.02〜0.06％、残部鉄よりなり、かつ焼入
により特殊ステダイトの分散したマルテンサイト
組織である合金鋳鉄製である。 In other words, the rotor has a weight ratio of TC3.00 to 3.60% and Si1.50.
~2.50%, Mn0.50~1.00%, P0.30% or less,
Made of alloyed cast iron, consisting of Cr0.50~1.00%, Ni0.15~0.25%, Mo0.25% or less, B0.02~0.06%, the balance being iron, and has a martensitic structure with special steadite dispersed through quenching. be.
クランク軸はB0.02〜0.06重量％含みパーライ
ト基地中に特殊ステダイトを面積比で5.0〜10.0
％含む鋳鉄製である。 The crankshaft contains B0.02~0.06% by weight, and special steadite in a pearlite base with an area ratio of 5.0~10.0.
It is made of cast iron containing %.
軸受はB0.08重量％以下含みパーライト基地中
に特殊ステダイトが3.0〜8.0面積％含むボロン鋳
鉄である。 The bearing is made of boron cast iron containing 3.0 to 8.0 area% of special steadite in a pearlite base containing 0.08% by weight or less of B.
ロータ材はベーンとの激しい摺動と、クランク
軸との摺動を受けるため、特に優れた耐摩耗性を
必要とし、要部に焼入れされるものであるが、本
発明にあつてはNi，Moを添加することにより焼
入性を改善しており、さらにCrがセメンタイト
中に炭化物として固溶しており、かつ焼入による
マルテンサイト基地にボロン炭化物を含む特殊ス
テダイトが分散しているため高硬度物が分散して
おり耐摩耗性に優れたものである。 The rotor material is subjected to intense sliding with the vanes and the crankshaft, so it requires particularly excellent wear resistance, and the main parts are hardened.In the present invention, Ni, Ni, Hardenability is improved by adding Mo, and Cr is solid-solved in cementite as a carbide, and special steadite containing boron carbide is dispersed in the martensite base created by quenching, resulting in high performance. Hard materials are dispersed and it has excellent wear resistance.
ロータ材の各成分元素の組成範囲限定理由を以
下に説明する。 The reason for limiting the composition range of each component element of the rotor material will be explained below.
Ｃは、鋳鉄における黒鉛と炭化物の形成元素で
ある。3.6％超では黒鉛が粗大化して正常な組織
が得られず、3.0％未満ではＡ形黒鉛が得られに
くく、炭化物も形成されにくい。 C is an element that forms graphite and carbides in cast iron. If it exceeds 3.6%, the graphite becomes coarse and a normal structure cannot be obtained, and if it is less than 3.0%, it is difficult to obtain type A graphite and carbide is difficult to form.
SiはＣとともに黒鉛の形成を促進する作用を有
するが、1.5％未満ではその効果が薄く、十分な
黒鉛が得られず、材料の脆化を招く。また2.5％
超では黒鉛が粗大化し、正常な黒鉛組織が得られ
ない。 Si, along with C, has the effect of promoting the formation of graphite, but if it is less than 1.5%, its effect is weak, and sufficient graphite cannot be obtained, leading to embrittlement of the material. Also 2.5%
If the temperature is too high, the graphite becomes coarse and a normal graphite structure cannot be obtained.
Mnは、基地に固溶し、基地の安定化に大きく
影響する元素であるが、0.5％未満ではその効果
が期待できず、1.0％超では効果が著しくは向上
せず不必要である。 Mn is an element that dissolves in solid solution in the base and greatly affects the stability of the base, but if it is less than 0.5%, no effect can be expected, and if it exceeds 1.0%, the effect will not be significantly improved and it is unnecessary.
Ｐは、Fe，Ｃとともにステダイトを形成する
元素であるが、0.3％超ではその析出量が過剰と
なり、材料の脆化を招く。 P is an element that forms steadite together with Fe and C, but if it exceeds 0.3%, the amount of P precipitated becomes excessive, leading to embrittlement of the material.
Crは、強力な炭化物形成元素であるが、0.5％
未満では炭化物量が少なく、十分な耐摩耗性が得
られない。1.0％超では逆に過剰となり被削性が
悪くなる。 Cr is a strong carbide forming element, but at 0.5%
If it is less than that, the amount of carbide will be small and sufficient wear resistance will not be obtained. On the other hand, if it exceeds 1.0%, it becomes excessive and machinability deteriorates.
Niは、基地強化と熱処理性の改善に有効な元
素であり、0.15％未満ではその効果が薄く、0.25
％超ではそれ以上添加しても効果が向上せず、コ
スト高となる。 Ni is an element that is effective in strengthening the base and improving heat treatability, but if it is less than 0.15%, its effect will be weak;
If it exceeds %, the effect will not improve even if it is added more than that, and the cost will increase.
Moは、鋳鉄の機械的性質の改善に最も効果の
ある元素で、0.25％以下で効果は十分得られ、そ
れ以上添加してもコスト高となる。 Mo is the most effective element for improving the mechanical properties of cast iron, and is sufficiently effective when added in an amount of 0.25% or less; adding more than that increases the cost.
Ｂは、炭化物形成元素であるが、0.06％超では
炭化物量が多過ぎて強度、被削性が劣り、0.02％
未満では炭化物の析出量が不足して十分な耐摩耗
性が得られない。 B is a carbide-forming element, but if it exceeds 0.06%, the amount of carbide is too large and the strength and machinability are poor;
If it is less than that, the amount of carbide precipitated will be insufficient and sufficient wear resistance will not be obtained.
クランク軸は上記の硬度の高いロータと摺動し
かつ軸受と摺動するため、相方になじみが良くか
つ耐摩耗性に優れる必要があるが、本発明にあつ
ては耐摩耗性に寄与する特殊ステダイト量を面積
比にて5.0〜10.0％としたボロン鋳鉄としたこと
により優れた結果を得たものである。 Since the crankshaft slides on the above-mentioned highly hard rotor and also slides on the bearings, it needs to be compatible with its counterpart and have excellent wear resistance. Excellent results were obtained by using boron cast iron with a steadite content of 5.0 to 10.0% in area ratio.
即ち、特殊ステダイト量が5.0％未満では全体
硬度が低下しロータに対し摩耗が激しく、10.0％
を超えた場合組織強度が低下し回転軸としての強
度に不安があるばかりでなく軸受材を激しく摩耗
させるものである。 In other words, if the amount of special steadite is less than 5.0%, the overall hardness will decrease and the rotor will wear heavily;
If it exceeds this, the structural strength decreases, which not only raises concerns about the strength of the rotating shaft, but also causes severe wear on the bearing material.
Ｂは、炭化物形成元素であるが、0.06％超では
炭化物量が多過ぎて強度、被削性が劣り、0.02％
未満では炭化物の析出量が、不足して十分な耐摩
耗性が得られない。 B is a carbide-forming element, but if it exceeds 0.06%, the amount of carbide is too large and the strength and machinability are poor;
If it is less than that, the amount of carbide precipitated will be insufficient and sufficient wear resistance will not be obtained.
軸受材はクランク軸との摺動を受けるものであ
るが、耐焼付性、耐摩耗性のみでなく、面圧強
度、潤滑性、シール性が要求されるものであり、
本発明にあつては基地が強靭なパーライトであり
面圧強度が充分であり、又特殊ステダイトが3.0
〜8.0面積％量分散しており、適度の硬度を有す
ることにより耐摩耗性に優れ、又鋳鉄特有の黒鉛
による潤滑性も相まつて耐焼付性に優れるもので
ある。特殊ステダイト量が3.0％未満でクランク
軸に対する硬度に不足し、摩耗量が増え、8.0％
を超えた場合潤滑性が不足する傾向にあり焼付の
不安がある。 Bearing materials are used to slide against the crankshaft, and are required to have not only seizure resistance and wear resistance, but also surface pressure strength, lubricity, and sealing properties.
In the present invention, the base is strong pearlite, which has sufficient surface pressure strength, and the special steadite is 3.0
It is dispersed in an amount of ~8.0% by area, and has an appropriate hardness, so it has excellent wear resistance, and the lubricity of graphite, which is unique to cast iron, also makes it excellent in seizure resistance. If the amount of special steadite is less than 3.0%, the hardness against the crankshaft is insufficient and the amount of wear increases, resulting in a reduction of 8.0%.
If it exceeds this, lubricity tends to be insufficient and there is a risk of seizure.
軸受材にはＢを0.08％以下添加して炭化物の析
出量を制御するが、0.08％を超えて添加すると炭
化物の析出量が過剰となり、強度、被削性が劣
る。 B is added to the bearing material in an amount of 0.08% or less to control the amount of carbide precipitation, but if it is added in excess of 0.08%, the amount of carbide precipitation becomes excessive, resulting in poor strength and machinability.
以上記した如く本発明にあつてはロータ、クラ
ンク軸、軸受がそれぞれ必要な性質を有してお
り、さらにその相互のなじみが良いため、極めて
優れたものである。 As described above, in the present invention, the rotor, crankshaft, and bearing each have the necessary properties, and furthermore, they are compatible with each other, so that the present invention is extremely excellent.
本発明によりロータ、クランク軸、軸受と従来
のものを比較し実験した結果を第３図、第４図に
示す。 The results of an experiment comparing the rotor, crankshaft, and bearing according to the present invention with conventional ones are shown in FIGS. 3 and 4.
第３図はベーンとローラの摩耗を示すものであ
り、ベーン：重量％にてTC3.35、Si1.75、
Mn0.75、Ni0.70、Cr1.0、Mo0.70、残部Ｐ，Ｓを
微少含む鉄よりなる鋳鉄。 Figure 3 shows the wear of vanes and rollers, vane: TC3.35, Si1.75 in weight%,
Cast iron that contains Mn0.75, Ni0.70, Cr1.0, Mo0.70, and the balance P and S in small amounts.
Γ 従来のロータ材：重量比にてTC2.91、
Si1.84、Mn0.63、P0.25、S0.09、Mo0.44、
Cu0.49の合金鋳鉄
Γ 本発明ロータ材：重量％にてTC3.17、
Si1.88、Mn0.74、P0.09、S0.05、Ni0.16、
Cr0.73、B0.02、Mo0.15の合金鋳鉄
Γ 試験条件 アムスラ型摩耗試験機
速度 1.10m／sec 運転時間 24時間
荷重 100Kg 潤滑油 ロータリオイル
油量 0.15／min
第４図はロータ、クランク軸の摩耗量とクラン
ク軸、軸受の焼付荷重を本発明のものと従来のも
のを比較した実験結果を示すものであり
Γ ロータ材：前記ロータ材と同一の本発明材及
び比較材。Γ Conventional rotor material: TC2.91 in weight ratio,
Si1.84, Mn0.63, P0.25, S0.09, Mo0.44,
Alloy cast iron Γ of Cu0.49 Rotor material of the present invention: TC3.17 in weight%,
Si1.88, Mn0.74, P0.09, S0.05, Ni0.16,
Alloy cast iron Γ of Cr0.73, B0.02, Mo0.15 Test conditions Amsura type wear tester Speed 1.10m/sec Operating time 24 hours Load 100Kg Lubricating oil Rotary oil Oil amount 0.15/min Figure 4 shows the rotor and crankshaft This shows the results of an experiment comparing the amount of wear and the seizure load of the crankshaft and bearings of the present invention and the conventional one.Rotor material: the same inventive material and comparative material as the rotor material described above.
Γ 従来のクランク軸：重量％にて、TC2.97、
Si1.78、Mn0.69、P0.68、、S0.07の鋳鉄。Γ Conventional crankshaft: TC2.97 in weight%,
Cast iron with Si1.78, Mn0.69, P0.68, and S0.07.
Γ 本発明のクランク材：重量比にて、TC3.11、
Si1.82、Mn0.72、P0.51、S0.081、B0.06の鋳
鉄。ステダイト量９％。Γ Crank material of the present invention: TC3.11 in weight ratio,
Cast iron with Si1.82, Mn0.72, P0.51, S0.081, B0.06. Steadite content 9%.
Γ 試験条件 横型回転円筒摩耗試験機
速度 0.8m／sec 荷重 10Kg／cm2
潤滑油 乾燥 運転時間 −
Γ 従来の軸受：FC25
Γ 本発明の軸受：重量％にて、TC3.20、
Si2.15、Mn0.60、P0.15、B0.03の鋳鉄。ステダ
イト量４％。Γ Test conditions Horizontal rotating cylindrical wear tester Speed 0.8m/sec Load 10Kg/cm 2 Lubricating oil Drying Operating time - Γ Conventional bearing: FC25 Γ Bearing of the present invention: TC3.20 in weight%,
Cast iron with Si2.15, Mn0.60, P0.15, B0.03. Steadite amount 4%.
Γ 試験条件 焼付試験機
速度 6m／sec
潤滑油：SAE＃30：灯油＝４：１
油温 50℃ 油量 0.3／min
第３図、第４図より明らかな如く、本発明のロ
ータ、クランク軸、軸受は従来の材料に比し著し
く耐摩耗性、耐焼付性に優れていることが実証さ
れる。Γ Test conditions Seizing tester Speed 6m/sec Lubricating oil: SAE #30: Kerosene = 4:1 Oil temperature 50℃ Oil amount 0.3/min As is clear from Figures 3 and 4, the rotor and crankshaft of the present invention It has been demonstrated that the bearing has significantly better wear resistance and seizure resistance than conventional materials.
これは本発明における各鋳鉄の黒鉛、特殊ステ
ダイト、基地組織の相乗効果によるものと思われ
る。 This is thought to be due to the synergistic effect of the graphite, special steadite, and base structure of each cast iron in the present invention.
さらに本発明にあつては同種の材料にて、ロー
タ、クランク軸、軸受をなすため、ポンプの熱膨
張により影響が極めて少なく、この意味からもシ
ール性に優れるものである。 Furthermore, in the present invention, since the rotor, crankshaft, and bearing are made of the same material, the effect of thermal expansion of the pump is extremely small, and in this sense, the sealing performance is excellent.
第１図回転式流体ポンプ断面図、第２図回転式
流体ポンプ側面断面図、、第３図本発明と従来の
ロータとベーンの摩耗量を示すグラフ、第４図本
発明と従来のロータ、クランク軸の摩耗量、及び
クランク軸、軸受の焼付荷重を示すグラフ。
符号の簡単な説明、１……シリンダ、２……ベ
ーン、３……ロータ、３１……ロータボス穴、４
……クランク軸、４１……ボス穴、５……軸受、
４２……回転軸。
Figure 1 is a sectional view of a rotary fluid pump, Figure 2 is a side sectional view of a rotary fluid pump, Figure 3 is a graph showing the amount of wear of rotors and vanes of the present invention and the conventional rotor, Figure 4 is the rotor of the present invention and the conventional rotor, A graph showing the amount of wear on the crankshaft and the seizure load on the crankshaft and bearings. Brief explanation of symbols, 1...Cylinder, 2...Vane, 3...Rotor, 31...Rotor boss hole, 4
... Crankshaft, 41 ... Boss hole, 5 ... Bearing,
42...Rotation axis.
Claims (1)
タが軸受により支承されるクランク軸により回転
される回転式流体ポンプにおいて、前期ロータが
重量比でTC3.00〜3.60％、Si1.50〜2.50％、
Mn0.50〜1.00％、P0.30％以下、Cr0.50〜1.00％、
Ni0.15〜0.25％、Mo0.25％以下、B0.02〜0.06％、
残部鉄よりなり、かつ焼入により特殊ステダイト
の分散したマルテンサイト組織であり、前記クラ
ンク軸がB0.02〜0.06重量％含みパーライト基地
中に特殊ステダイトを面積比にて5.0〜10％含む
鋳鉄製であり、かつ前記軸受がB0.08％以下含み
パーライト基地中に特殊ステダイトが3.0〜8.0面
積％含むボロン鋳鉄であることを特徴とする回転
式流体ポンプ。1. In a rotary fluid pump that has a cylinder, vanes, and a rotor, and is rotated by a crankshaft in which the rotor is supported by a bearing, the first rotor has a weight ratio of TC 3.00 to 3.60%, Si 1.50 to 2.50%,
Mn0.50~1.00%, P0.30% or less, Cr0.50~1.00%,
Ni0.15~0.25%, Mo0.25% or less, B0.02~0.06%,
The crankshaft is made of cast iron, with the remainder being iron and having a martensitic structure with special steadite dispersed through quenching, and containing 0.02 to 0.06% by weight of B and 5.0 to 10% by area of special steadite in a pearlite base. A rotary fluid pump characterized in that the bearing is made of boron cast iron containing 0.08% or less of B and 3.0 to 8.0 area% of special steadite in a pearlite base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8404379A JPS569686A (en) | 1979-07-04 | 1979-07-04 | Rotary fluid pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8404379A JPS569686A (en) | 1979-07-04 | 1979-07-04 | Rotary fluid pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS569686A JPS569686A (en) | 1981-01-31 |
| JPS6361378B2 true JPS6361378B2 (en) | 1988-11-29 |
Family
ID=13819475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8404379A Granted JPS569686A (en) | 1979-07-04 | 1979-07-04 | Rotary fluid pump |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS569686A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH026674U (en) * | 1988-06-27 | 1990-01-17 |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01240785A (en) * | 1988-03-22 | 1989-09-26 | Atsugi Motor Parts Co Ltd | Vane type rotary compressor |
| BR9204244A (en) * | 1992-10-26 | 1994-05-03 | Cofap | Gray cast iron |
| KR101404754B1 (en) * | 2011-11-14 | 2014-06-13 | 엘지전자 주식회사 | Alloy cast iron and manufacturing method of rolling piston using the same |
-
1979
- 1979-07-04 JP JP8404379A patent/JPS569686A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH026674U (en) * | 1988-06-27 | 1990-01-17 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS569686A (en) | 1981-01-31 |
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