JPH11279413A - Sliding member for dry gas - Google Patents
Sliding member for dry gasInfo
- Publication number
- JPH11279413A JPH11279413A JP10080929A JP8092998A JPH11279413A JP H11279413 A JPH11279413 A JP H11279413A JP 10080929 A JP10080929 A JP 10080929A JP 8092998 A JP8092998 A JP 8092998A JP H11279413 A JPH11279413 A JP H11279413A
- Authority
- JP
- Japan
- Prior art keywords
- resin
- sliding member
- weight
- dry gas
- graphite
- 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
Links
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- Ceramic Products (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Sliding-Contact Bearings (AREA)
Abstract
(57)【要約】
【課題】 高圧のドライガス雰囲気中で、低摩耗量且つ
低摩擦係数を維持できるドライガス用摺動部材を提供す
る。
【解決手段】 炭素繊維２０〜５０重量％、黒鉛粉末５
〜２０重量％、樹脂３０〜７０重量％を混合し、熱圧成
形してなり、前記黒鉛粉末は４０μｍ以下に細かく調整
してなる。(57) [Problem] To provide a dry gas sliding member capable of maintaining a low wear amount and a low friction coefficient in a high-pressure dry gas atmosphere. SOLUTION: Carbon fiber 20 to 50% by weight, graphite powder 5
-20% by weight and a resin of 30-70% by weight are mixed and hot-pressed, and the graphite powder is finely adjusted to 40 μm or less.
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、高圧のドライガス
雰囲気中で使用されるドライガス用摺動部材に関する。The present invention relates to a dry gas sliding member used in a high-pressure dry gas atmosphere.
【０００２】[0002]
【従来の技術】炭素材料は一般に、自己潤滑性、耐熱
性、耐薬品性等に優れた性質を有している。この点に着
目して、炭素質材料を所定形状に形成した後、焼結して
なる焼結カーボン材が、メカニカルシールや軸受等の摺
動部材として多用されている。2. Description of the Related Art Generally, carbon materials have excellent properties such as self-lubricating properties, heat resistance and chemical resistance. Focusing on this point, a sintered carbon material formed by forming a carbonaceous material into a predetermined shape and then sintering is often used as a sliding member such as a mechanical seal or a bearing.
【０００３】[0003]
【発明が解決しようとする課題】ただし、この焼結カー
ボン材からなる摺動部材を高圧のドライガス雰囲気中に
用いると、異常摩耗が発生して使えない事が判った。However, it has been found that when the sliding member made of the sintered carbon material is used in a high-pressure dry gas atmosphere, abnormal wear occurs and the sliding member cannot be used.
【０００４】炭素繊維、黒鉛及び樹脂を混合し、熱圧成
形してなる摺動部材を適用することも考えられるが、前
述した高圧のドライガス雰囲気中の使用では摩耗が早
く、更に製品毎に性能のバラツキも大きかった。[0004] It is conceivable to apply a sliding member formed by mixing carbon fiber, graphite and resin and hot-pressing the material. The variation in performance was also large.
【０００５】本発明は、かかる現状に鑑みなされたもの
であり、高圧のドライガス雰囲気中で、低摩耗量且つ低
摩擦係数を維持できるドライガス用摺動部材を提供する
ことを目的とする。SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and has as its object to provide a dry gas sliding member capable of maintaining a low wear amount and a low friction coefficient in a high-pressure dry gas atmosphere.
【０００６】[0006]
【課題を解決するための手段】炭素繊維、黒鉛及び樹脂
を混合し、熱圧成形してなる摺動部材において、各成分
の割合を適切にし、粒度調整によって黒鉛の分散を均一
にすることで、ドライガス用摺動部材としての特性を向
上させるとともに、安定させることができるという知見
を得て本発明を完成した。Means for Solving the Problems In a sliding member formed by mixing carbon fiber, graphite and resin and hot-press forming, the proportion of each component is made appropriate and the dispersion of graphite is made uniform by adjusting the particle size. The present inventors have found that the characteristics as a dry gas sliding member can be improved and stabilized, and the present invention has been completed.
【０００７】請求項１の発明は、炭素繊維２０〜５０重
量％、黒鉛粉末５〜２０重量％、樹脂３０〜７０重量％
を混合し、熱圧成形してなり、前記黒鉛粉末は４０μｍ
以下に細かく調整されてなるドライガス用摺動部材であ
る。According to the first aspect of the present invention, carbon fiber is 20 to 50% by weight, graphite powder is 5 to 20% by weight, and resin is 30 to 70% by weight.
Are mixed and hot-pressed, and the graphite powder is 40 μm
A dry gas sliding member that is finely adjusted below.
【０００８】請求項２の発明は、請求項１において、前
記黒鉛粉末は、人造黒鉛と天然黒鉛を配合してなるドラ
イガス用摺動部材である。According to a second aspect of the present invention, in the first aspect, the graphite powder is a sliding member for dry gas comprising artificial graphite and natural graphite.
【０００９】請求項３の発明は、請求項１又は２におい
て、前記樹脂は、フェノール樹脂、エポキシ樹脂、フラ
ン樹脂、尿素樹脂、メラミン樹脂、ポリエステル樹脂、
ポリイミド樹脂、アリル樹脂等の熱硬化性樹脂の１種又
は２種以上の樹脂を混合してなるドライガス用摺動部材
である。According to a third aspect of the present invention, in the first or second aspect, the resin is a phenol resin, an epoxy resin, a furan resin, a urea resin, a melamine resin, a polyester resin,
A dry gas sliding member obtained by mixing one or more thermosetting resins such as a polyimide resin and an allyl resin.
【００１０】炭素繊維は、ＰＡＮ系又はピッチ系のもの
であって、補強のために用いられる。この炭素繊維が５
０重量％を越えると、相手材の摩耗が増え、２０重量％
未満になると、強度が弱くなり、自己摩耗が増える。The carbon fiber is of a PAN type or pitch type and is used for reinforcement. This carbon fiber is 5
If it exceeds 0% by weight, the wear of the mating material increases, and 20% by weight
If less, the strength is weakened and self-wear increases.
【００１１】このような炭素繊維は、直径１０〜１５μ
ｍの長繊維を、長さが２〜４ｍｍになるようにカットし
て用いられる。Such a carbon fiber has a diameter of 10 to 15 μm.
m long fiber is used after being cut so that the length becomes 2 to 4 mm.
【００１２】黒鉛粉末は、人造黒鉛、天然黒鉛等であっ
て、自己潤滑性を付与するために用いられる。この黒鉛
が３０重量％を越えると、強度が弱くなり、５重量％未
満になると自己摩耗が増える。The graphite powder is artificial graphite, natural graphite or the like, and is used for imparting self-lubricating properties. If this graphite exceeds 30% by weight, the strength will be weak, and if it is less than 5% by weight, self-wear will increase.
【００１３】このような人造黒鉛及び天然黒鉛は、レー
ザ回折散乱法により４０μｍ以下の粒度に調整される。
黒鉛粉末の粒度が４０μｍを越えると、混練における均
一分散性が得られなくなる。均一分散性の観点から、黒
鉛粉末は好ましくは１０μｍ以下の粒度に調整される。
黒鉛粉末の粒度を調整すると、炭素繊維、黒鉛及び樹脂
との均一混合が可能になり、分散性が高くなって、ドラ
イガス用摺動部材として安定した特性を得ることが出来
る。Such artificial graphite and natural graphite are adjusted to a particle size of 40 μm or less by a laser diffraction scattering method.
If the particle size of the graphite powder exceeds 40 μm, uniform dispersibility in kneading cannot be obtained. From the viewpoint of uniform dispersibility, the graphite powder is preferably adjusted to a particle size of 10 μm or less.
When the particle size of the graphite powder is adjusted, uniform mixing with the carbon fiber, graphite and resin becomes possible, the dispersibility is increased, and stable characteristics as a dry gas sliding member can be obtained.
【００１４】また、黒鉛粉末は、人造黒鉛と天然黒鉛と
を配合したものが好ましい。人造黒鉛又は天然黒鉛、特
に天然黒鉛の特性を変えて、均一分散性という観点から
相性の良い配合を得ることが可能になるからである。な
お、好ましい配合割合は、人造黒鉛１００重量部に対し
て天然黒鉛５０〜３００重量部である。Preferably, the graphite powder is a mixture of artificial graphite and natural graphite. This is because it is possible to change the characteristics of artificial graphite or natural graphite, particularly natural graphite, and to obtain a composition having good compatibility from the viewpoint of uniform dispersibility. A preferred compounding ratio is 50 to 300 parts by weight of natural graphite with respect to 100 parts by weight of artificial graphite.
【００１５】樹脂は、種々の熱硬化性樹脂から選択され
たものであって、成形性を付与するバインダーとして用
いられる。この樹脂が、７０重量％を越えると、成形不
良が多くなって、耐熱性が下がる。３０重量％未満にな
ると、強度が弱くなる。The resin is selected from various thermosetting resins, and is used as a binder for imparting moldability. When this resin exceeds 70% by weight, molding defects increase and heat resistance decreases. If it is less than 30% by weight, the strength will be weak.
【００１６】このような樹脂には、フェノール樹脂やエ
ポキシ樹脂等の汎用的な熱硬化性樹脂が用いられる。た
だし、耐熱性や耐摩耗性を上げるために、より耐熱性の
高いポリエステル樹脂や、ポリイミド樹脂、アリル樹脂
等を添加して用いることが好ましい。なお、好ましい配
合割合は樹脂の種類によって異なるが、おおよそ、汎用
樹脂１００重量部に対して耐熱性樹脂２０〜２００重量
部である。As such a resin, a general-purpose thermosetting resin such as a phenol resin or an epoxy resin is used. However, it is preferable to add a polyester resin, a polyimide resin, an allyl resin or the like having higher heat resistance in order to increase heat resistance and wear resistance. Although the preferred mixing ratio varies depending on the type of the resin, it is approximately 20 to 200 parts by weight of the heat-resistant resin with respect to 100 parts by weight of the general-purpose resin.
【００１７】つぎに、炭素繊維、黒鉛粉末及び樹脂から
なるドライガス用摺動部材の製造方法の一例を説明す
る。まず、炭素繊維、黒鉛粉末及び樹脂の素材を混合す
る。つぎに、これら素材を混練する。この混練は、ニー
ダ混練とロールによる加熱混練を併用して行うことが好
ましい。つぎに、混練物を粉砕し、更に混合する。つぎ
に、熱圧成形により所定形状を得る。つぎに、熱圧成形
品に後熱処理を施し、製品素材を得る。この製品素材に
所定の加工を施すと、所定の製品が得られる。Next, an example of a method for producing a dry gas sliding member comprising carbon fiber, graphite powder and resin will be described. First, carbon fiber, graphite powder and resin materials are mixed. Next, these materials are kneaded. This kneading is preferably performed by using both kneader kneading and heat kneading with a roll. Next, the kneaded material is pulverized and further mixed. Next, a predetermined shape is obtained by hot pressing. Next, post-heat treatment is performed on the hot-pressed product to obtain a product material. When a predetermined processing is performed on this product material, a predetermined product is obtained.
【００１８】このようにして製造されたドライガス用摺
動部材の具体的な用途を以下に説明する。高圧ドライガ
スコンプレッサーのパッキン材、例えばピストンリン
グ、ライダーリング、ロッドパッキンなどに用いられ
る。また、揺動式コンプレッサー用ベーン材としても用
いられる。The specific use of the dry gas sliding member thus manufactured will be described below. It is used for a packing material of a high-pressure dry gas compressor, for example, a piston ring, a rider ring, a rod packing and the like. It is also used as a vane material for a swinging compressor.
【００１９】ドライガスの種類としては、窒素ガス、水
素ガス、アルゴンガス、一酸化炭素ガス、乾燥空気、炭
化水素ガス等が挙げられる。Examples of the type of dry gas include nitrogen gas, hydrogen gas, argon gas, carbon monoxide gas, dry air, and hydrocarbon gas.
【００２０】上述した摺動部材は、高強度を付与する炭
素繊維と、優れた固体潤滑剤である所定粒度以下の黒鉛
粉末と、これらを樹脂中に均一分散させて複合化したも
のである。そのため、大気圧以上の高圧のドライガス雰
囲気中で摺動部材として用いると、特に高圧ドライ状態
での摺動性が優れ、曲げ強さや圧縮強さ等の機械的強度
に優れ、耐衝撃性が高く、粘り強い。また嵩密度が低く
いため、軽量化設計に役立たせることができる。The above-mentioned sliding member is a composite obtained by uniformly dispersing carbon fibers imparting high strength, graphite powder having a predetermined particle size or less as an excellent solid lubricant in a resin, and dispersing them in a resin. Therefore, when used as a sliding member in a dry gas atmosphere at a pressure higher than the atmospheric pressure, the slidability in a high-pressure dry state is particularly excellent, the mechanical strength such as bending strength and compressive strength is excellent, and the impact resistance is high. High and tenacious. In addition, since the bulk density is low, it can be used for a lightweight design.
【００２１】典型的な前記摺動部材の特性値は、嵩密度
１．３ｇ／ｃｍ2 以上、ショア硬度（Ｄスケール）６０
以上、曲げ強さ６０ＭＰａ以上、圧縮強さ１５０ＭＰａ
以上、シャルピー衝撃強さ５ｋＪ／ｍ2 、熱膨張係数
（常温〜２００℃）３０×１０ -6／℃以上、耐熱温度１
８０℃以上である。A typical characteristic value of the sliding member is a bulk density.
1.3 g / cmTwoAbove, Shore hardness (D scale) 60
Above, bending strength 60MPa or more, compressive strength 150MPa
Above, Charpy impact strength of 5 kJ / mTwo, Thermal expansion coefficient
(Normal temperature to 200 ° C) 30 × 10 -6/ ℃ or more, heat-resistant temperature 1
80 ° C. or higher.
【００２２】[0022]
【実施例】以下、実施例によって本発明を具体的に説明
する。The present invention will be specifically described below with reference to examples.
【００２３】実施例１ まず、炭素繊維４０重量％、黒鉛粉末（人造黒鉛３０μ
ｍ／天然黒鉛２μｍ＝１００／１００）２０重量％、エ
ポキシ樹脂４０重量％を混合し、ニーダ混練とロールに
よる加熱混練を行った。次に、この混練物を粉砕し、更
に混合し、熱圧成形を施し所定の形状に成形し、試験用
摺動部材とした。Example 1 First, carbon fiber 40% by weight, graphite powder (artificial graphite 30 μm) was used.
m / natural graphite 2 μm = 100/100) 20% by weight and an epoxy resin 40% by weight were mixed, and kneaded and heated and kneaded by a roll. Next, the kneaded product was pulverized, further mixed, subjected to hot-press molding, and formed into a predetermined shape to obtain a test sliding member.
【００２４】比較例１ 実施例１と同様の材質の黒鉛粉末７０重量％、エポキシ
樹脂３０重量％を、実施例１と同様の手法で、混合、混
練し、得られた混練物を冷圧成形し、非酸化雰囲気にて
１０００℃で焼成し、焼結炭素の試験用摺動部材を得
た。Comparative Example 1 70% by weight of graphite powder and 30% by weight of epoxy resin of the same material as in Example 1 were mixed and kneaded in the same manner as in Example 1, and the obtained kneaded product was cold-pressed. Then, the resultant was fired at 1000 ° C. in a non-oxidizing atmosphere to obtain a sliding member for test of sintered carbon.
【００２５】上述した実施例１及び比較例１の摺動部材
について下記の摩耗試験を行った。相手材として硬質ク
ロームメッキ材を用い、周速３．７ｍ／ｓ、荷重１００
０ＫＰａで条件であった。雰囲気は、湿潤大気中及びド
ライな窒素ガスの両方で行った。その結果が、図１に示
される。比較例１の焼結カーボンは湿潤大気中で良好な
摺動性を示すが、窒素ガスのようなドライガス雰囲気に
なると、実施例１が優れた特性を示す事が判る。The sliding members of Example 1 and Comparative Example 1 were subjected to the following wear test. Using a hard chrome plating material as the mating material, a peripheral speed of 3.7 m / s and a load of 100
The condition was 0 KPa. The atmosphere was performed in both a humid atmosphere and dry nitrogen gas. The result is shown in FIG. The sintered carbon of Comparative Example 1 shows good slidability in a humid atmosphere, but it can be seen that Example 1 shows excellent characteristics in a dry gas atmosphere such as nitrogen gas.
【００２６】つぎに、黒鉛の粒度を変えて得られた摺動
部材について摩耗試験を行った。表１のように、黒鉛粉
末として、人造黒鉛と天然黒鉛を配合したものを用い、
特に天然黒鉛の粒度を大から小へと変化させたものを用
い、摩耗試験を行った。なお、黒鉛粒径以外は、実施例
１と同様である。Next, a wear test was performed on the sliding member obtained by changing the particle size of graphite. As shown in Table 1, as the graphite powder, a mixture of artificial graphite and natural graphite was used.
In particular, an abrasion test was performed using natural graphite having a particle size changed from large to small. Except for the graphite particle size, it is the same as Example 1.
【００２７】[0027]
【表１】 [Table 1]
【００２８】表１によると、黒鉛粉末の粒度が均一混合
性に影響を与えることが判る。４０μｍ以下にすると、
比摩耗量及びトルクを小さく保つことができる。According to Table 1, it is found that the particle size of the graphite powder affects the uniform mixing property. If it is 40 μm or less,
Specific wear and torque can be kept small.
【００２９】[0029]
【発明の効果】以上説明したように、本件発明にかかる
摺動部材は、通常の大気中での摺動特性のみならず、高
ドライ状態において摩耗量が少なく、摩擦係数も少なく
なるという特性を有する。また、曲げや圧縮等の強度が
高いため、偏荷重による折損や衝撃によるカケ等が発生
しなくなる。As described above, the sliding member according to the present invention has not only the sliding characteristics in a normal atmosphere but also the characteristics of a small amount of wear and a low friction coefficient in a high dry state. Have. In addition, since it has high strength such as bending and compression, breakage due to unbalanced load and chipping due to impact do not occur.
【図１】摩耗試験の結果を示すグラフ図である。FIG. 1 is a graph showing the results of a wear test.
Claims (3)
〜２０重量％、樹脂３０〜７５重量％を混合し、熱圧成
形してなり、前記黒鉛粉末は４０μｍ以下に細かく調整
されてなるドライガス用摺動部材。1. Carbon fiber 20 to 50% by weight, graphite powder 5
A sliding member for dry gas, wherein the graphite powder is finely adjusted to 40 μm or less by mixing and hot-pressing a mixture of 30 to 75% by weight of a resin and 30 to 75% by weight of a resin.
配合してなる請求項１記載のドライガス用摺動部材。2. The sliding member for dry gas according to claim 1, wherein the graphite powder is a mixture of artificial graphite and natural graphite.
１種以上を添加してなる請求項１又は２記載のドライガ
ス用摺動部材。3. The sliding member for dry gas according to claim 1, wherein the resin includes at least one kind of thermosetting resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08092998A JP4176184B2 (en) | 1998-03-27 | 1998-03-27 | Sliding member for dry gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08092998A JP4176184B2 (en) | 1998-03-27 | 1998-03-27 | Sliding member for dry gas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11279413A true JPH11279413A (en) | 1999-10-12 |
| JP4176184B2 JP4176184B2 (en) | 2008-11-05 |
Family
ID=13732140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP08092998A Expired - Lifetime JP4176184B2 (en) | 1998-03-27 | 1998-03-27 | Sliding member for dry gas |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4176184B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002020179A (en) * | 2000-06-28 | 2002-01-23 | Mitsubishi Pencil Co Ltd | Composite carbon molded article and method for producing the same |
| EP2169243A1 (en) | 2008-09-30 | 2010-03-31 | Hitachi Ltd. | Plain bearing unit |
| WO2011070621A1 (en) | 2009-12-10 | 2011-06-16 | 株式会社日立製作所 | Slide bearing device and compressor |
-
1998
- 1998-03-27 JP JP08092998A patent/JP4176184B2/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002020179A (en) * | 2000-06-28 | 2002-01-23 | Mitsubishi Pencil Co Ltd | Composite carbon molded article and method for producing the same |
| EP2169243A1 (en) | 2008-09-30 | 2010-03-31 | Hitachi Ltd. | Plain bearing unit |
| JP2010084804A (en) * | 2008-09-30 | 2010-04-15 | Hitachi Ltd | Sliding bearing unit |
| WO2011070621A1 (en) | 2009-12-10 | 2011-06-16 | 株式会社日立製作所 | Slide bearing device and compressor |
| US9255606B2 (en) | 2009-12-10 | 2016-02-09 | Hitachi, Ltd. | Slide bearing device and compressor |
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