JPS6224869Y2 - - Google Patents
Info
- Publication number
- JPS6224869Y2 JPS6224869Y2 JP1981162621U JP16262181U JPS6224869Y2 JP S6224869 Y2 JPS6224869 Y2 JP S6224869Y2 JP 1981162621 U JP1981162621 U JP 1981162621U JP 16262181 U JP16262181 U JP 16262181U JP S6224869 Y2 JPS6224869 Y2 JP S6224869Y2
- Authority
- JP
- Japan
- Prior art keywords
- abutment
- seal ring
- initial
- gap dimension
- resin
- 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
- 239000011347 resin Substances 0.000 claims description 14
- 229920005989 resin Polymers 0.000 claims description 14
- 238000007789 sealing Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- 239000009719 polyimide resin Substances 0.000 description 2
- 229910021364 Al-Si alloy Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229930182556 Polyacetal Natural products 0.000 description 1
- 239000004962 Polyamide-imide Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920002312 polyamide-imide Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
Description
【考案の詳細な説明】
本考案は、油圧空圧回転軸に使用される樹脂製
シールリングに関するものである。[Detailed Description of the Invention] The present invention relates to a resin seal ring used for a hydropneumatic rotating shaft.
一般に、シールリングのシール性能を左右する
要因は種々挙げられているが、中でもシールリン
グの合口隙間が著しい影響を及ぼすことは衆知の
事実である。この合口隙間の寸法は、使用時の温
度上昇による熱膨張量を見込んで、合口が突き当
らない範囲で最小の合口隙間が通常設定されてい
る。特に樹脂製シールリングの場合は、金属製シ
ールリングにくらべ、その熱膨張係数が大きいこ
とから、合口隙間の寸法を大きく設定するのが一
般的である。しかしながら、樹脂製シールリング
は、特にシールリングの外周面が押接されるハウ
ジングのシール面が金属の場合に、シールリング
の外周面の初期摩耗が大きいので、運転初期に上
述の外周面の初期摩耗によつてシールリングがそ
の弾性のために摩耗分だけ拡開し、合口隙間はま
すます大きくなり、シール性能の低下をきたす。 Generally, there are various factors that influence the sealing performance of a seal ring, but it is a well-known fact that among them, the abutment gap of the seal ring has a significant effect. The dimensions of this abutment gap are usually set to the minimum abutment gap within a range where the abutments do not butt each other, taking into account the amount of thermal expansion due to temperature rise during use. In particular, in the case of a resin seal ring, since its coefficient of thermal expansion is larger than that of a metal seal ring, it is common to set the size of the abutment gap larger. However, with resin seal rings, the initial wear of the outer circumferential surface of the seal ring is large, especially when the seal surface of the housing to which the outer circumferential surface of the seal ring is pressed is made of metal. Due to wear, the seal ring expands by the wear amount due to its elasticity, and the abutment gap becomes larger and larger, resulting in a decrease in sealing performance.
本考案は、上記の鑑み、樹脂製シールリングの
シール性能の永続的な持続のために、初期摩耗に
よつて生ずる合口隙間の増加量を予め見込んで、
合口隙間の寸法を設定することにより、永続的な
シール性能をもつ樹脂製シールリングを提供する
ことを目的とするものである。 In view of the above, in order to maintain the sealing performance of the resin seal ring permanently, the present invention takes into consideration the increase in the joint gap caused by initial wear.
The purpose of this invention is to provide a resin seal ring that has permanent sealing performance by setting the dimensions of the abutment gap.
以下、図面に基づいて本考案の一実施例を説明
する。 Hereinafter, one embodiment of the present invention will be described based on the drawings.
第１〜２図に示す如く、樹脂製シールリングの
合口面を傾斜角θを有する斜面に形成し、初期合
口隙間寸法Ｇが負数、即ち、マイナス値第１図に
示すように合口面間に空間の隙間が有るときの合
口隙間寸法Ｇを（＋）とし、第２図に示す如く、
合口面が互いにずれて当接して合口に重なりを生
じた状態の時の重なり寸法を、合口隙間寸法Ｇが
（−）であるとする。）になるように設定するもの
である。又樹脂製シールリングの特徴として、金
属製シールリングの如くハウジングのシール面を
傷つけることもない。従つて、初期合口隙間寸法
Ｇをマイナス値にすることによつて、組付初期の
段階では若干シール性能が悪化するが、前述した
如く、樹脂製シールリング外周面の初期摩耗が早
いことと、シールリングが樹脂製であるので、可
撓性に富み当り性がよいことによつて、短時間に
合口面相互のずれが解消して合口の重なりがない
定常状態となる。その時には、極めて小さな合口
隙間の寸法で使用できるので、良好なシール性能
が永続的に持続されることとなる。 As shown in Figures 1 and 2, the abutment surface of the resin seal ring is formed into a slope having an inclination angle θ, and the initial abutment gap dimension G is a negative number, that is, a negative value. When there is a space gap, the abutment gap dimension G is set as (+), as shown in Figure 2,
It is assumed that the overlapping dimension when the abutment surfaces are shifted from each other and come into contact with each other to cause an overlap at the abutment is that the abutment gap dimension G is (-). ). Another feature of the resin seal ring is that it does not damage the sealing surface of the housing unlike metal seal rings. Therefore, by setting the initial abutment gap dimension G to a negative value, the sealing performance will deteriorate slightly in the initial stage of assembly, but as mentioned above, the initial wear of the outer peripheral surface of the resin seal ring will be rapid. Since the seal ring is made of resin, it is highly flexible and has good abutting properties, so that the misalignment between the abutment surfaces is resolved in a short time, resulting in a steady state in which the abutment surfaces do not overlap. At that time, it can be used with an extremely small abutment gap, so good sealing performance can be maintained permanently.
そして、初期合口隙間寸法Ｇのマイナス値は、
合口面が互いにずれて合口の上、下縁がシールリ
ング装入溝の上下面に突き当らない範囲内、即
ち、サイドクリアランス内とすべきであり、その
ため第３図に示すように、合口面傾斜角度をθ、
サイドクリアランスをＣとすれば、初期合口隙間
寸法Ｇは次式を満足する負数値であることが条件
となる。 Then, the negative value of the initial abutment gap dimension G is,
It should be within the range where the abutment surfaces are shifted from each other and the upper and lower edges of the abutment do not touch the upper and lower surfaces of the seal ring insertion groove, that is, within the side clearance. Therefore, as shown in Figure 3, the abutment surfaces The inclination angle is θ,
If the side clearance is C, the initial abutment gap dimension G must be a negative value that satisfies the following equation.
Ｏ＞Ｇ＞−Ｃ／ｔａｎθ
そして、初期合口隙間寸法Ｇのマイナス値は、
ハウジングシール面との間の初期摩耗の状況によ
つて、上記範囲内で適切な値を設定するものであ
る。 O>G>-C/tanθ And the negative value of the initial abutment gap dimension G is:
An appropriate value is set within the above range depending on the initial wear condition between the housing sealing surface and the housing sealing surface.
以下、本考案の効果を油圧用シールリングでの
実施例によつて説明する。 Hereinafter, the effects of the present invention will be explained using an example of a hydraulic seal ring.
リング仕様として、リング径18.00mm、材質は
カーボン入りポリイミド樹脂とし、組付時の合口
は、従来のシールリングの初期合口隙間寸法
（＋）0.05mmとし、合口面の傾斜角度70゜とした
従来例と、シールリングの初期合口隙間寸法Ｇを
（−）0.05mmで合口面傾斜角度70゜とした本考案
の第１実施例Ａと、シールリングの初期合口隙間
寸法Ｇを（−）0.03mmで合口面傾斜角度20゜とし
た本考案の第２実施例Ｂと、の３種類を比較試験
した。なお、ハウジングのシール面材質として
Al−Si合金を使用した。 As for the ring specifications, the ring diameter is 18.00 mm, the material is carbon-containing polyimide resin, and the abutment when assembled is the conventional seal ring's initial abutment gap dimension (+) 0.05 mm, and the inclination angle of the abutment surface is 70°. Example, first embodiment A of the present invention in which the initial abutment gap dimension G of the seal ring is (-) 0.05 mm and the abutment surface inclination angle is 70 degrees, and the initial abutment gap dimension G of the seal ring is (-) 0.03 mm. A comparative test was carried out on three types: 2nd Example B of the present invention in which the abutment surface inclination angle was 20°. In addition, as the sealing surface material of the housing,
Al-Si alloy was used.
試験方法は第４図に示した油漏れ試験機を使用
し、試験条件は油圧８Kg／cm2、油温80℃（この時
の油粘度11.4cst）、軸回転数6000rpmとして油漏
れ試験を実施した。ａは油入口、ｂとb′は油漏れ
出口、１はシールリング、２はハウジング、３は
オイルシール、４は回転軸である。その結果を第
５図に示した。初期合口隙間寸法を（＋）0.05mm
に設定した従来のシールリングでは、約20時間後
に油漏れ量が50cc／分で横ばい状態に達した。こ
れに比べて、本考案の第１実施例Ａに係るところ
の初期合口隙間寸法Ｇを（−）0.05mmとし合口面
傾斜角度70゜に設定したシールリングでは、試験
開始直後には150cc／分と多くの油漏れを示した
が、15分後には40cc／分と低減し、その後も低下
して50時間後には3cc／分と極めて少ない油漏れ
量となつて横ばい状態となつた。 The test method used the oil leak test machine shown in Figure 4, and the test conditions were an oil pressure of 8 kg/cm 2 , an oil temperature of 80°C (oil viscosity at this time of 11.4 cst), and a shaft rotation speed of 6000 rpm. did. a is an oil inlet, b and b' are oil leakage outlets, 1 is a seal ring, 2 is a housing, 3 is an oil seal, and 4 is a rotating shaft. The results are shown in FIG. Initial abutment gap dimension (+) 0.05mm
With the conventional seal ring set to , the oil leakage leveled out at 50cc/min after about 20 hours. In comparison, with the seal ring according to the first embodiment A of the present invention, in which the initial abutment gap dimension G was set to (-) 0.05 mm and the abutment surface inclination angle was set to 70°, the rate of flow rate was 150 cc/min immediately after the start of the test. However, after 15 minutes, the amount of oil leaked decreased to 40 cc/min, and after 50 hours, the amount of oil leaked was extremely small at 3 cc/min, and leveled off.
又、本考案の第２実施例Ｂに係るところの初期
合口隙間寸法Ｇを（−）0.03mmとし合口面傾斜角
度20゜に設定したシールリングでは、試験開始時
から10cc／分以下の極めて少ない油漏れを示して
おり、10時間後に横ばい状態となり、50時間後に
は9.5cc／分という少い量で安定した油漏れ特性
が得られた。 Furthermore, in the case of the seal ring according to the second embodiment B of the present invention, in which the initial abutment gap dimension G was set to (-) 0.03 mm and the abutment surface inclination angle was set to 20 degrees, the rate was extremely low at 10 cc/min or less from the start of the test. It showed oil leakage, leveled out after 10 hours, and after 50 hours, stable oil leakage characteristics were obtained with a small amount of 9.5 cc/min.
使用状態の油温80℃において、シールリングと
相手材であるハウジングの熱膨張係数より算出さ
れるシールリングの合口隙間寸法のマイナス値
は、計算上（−）0.06mm増加することから、使用
温度時における本考案の第１実施例Ａ及び第２実
施例Ｂのリング合口隙間寸法は、夫々初期寸法よ
り0.06mm増加して（−）0.11mmと（−）0.09mmに
なり、又リング外周面の初期摩耗によりリング合
口隙間寸法は約（＋）0.08〜0.11mm増加すること
から、結局、本考案の第１実施例Ａ及び第２実施
例Ｂのシールリングの使用中における合口隙間の
寸法は、（−）増加値と（＋）増加値とが相殺さ
れて殆んどゼロであると言える。 At an operating oil temperature of 80°C, the negative value of the seal ring abutment gap dimension calculated from the thermal expansion coefficient of the seal ring and the housing, which is the mating material, increases by (-) 0.06 mm, so the operating temperature At this time, the ring abutment gap dimensions of the first embodiment A and the second embodiment B of the present invention were increased by 0.06 mm from the initial dimensions to (-) 0.11 mm and (-) 0.09 mm, and the ring outer peripheral surface Since the ring abutment gap size increases by approximately (+) 0.08 to 0.11 mm due to initial wear, the size of the abutment gap during use of the seal rings of the first embodiment A and the second embodiment B of the present invention is, after all, , it can be said that the (-) increase value and the (+) increase value cancel each other out and become almost zero.
以上のように、本考案に係る樹脂製シールリン
グは、初期合口隙間寸法Ｇをマイナス値に設定す
ることにより、使用中における油漏れ量は約1/6
〜1/16に低減し、大巾なシール性能の向上を示
し、その実用的効果は著大である。 As described above, the resin seal ring according to the present invention reduces the amount of oil leakage during use by approximately 1/6 by setting the initial abutment gap dimension G to a negative value.
It has been reduced to ~1/16, indicating a significant improvement in sealing performance, and its practical effects are significant.
なお、シールリング樹脂としては、上述のポリ
イミド樹脂の他、四フツ化エチレン、ポリアセタ
ール、フエノール樹脂、ポリエステル、ポリアミ
ドイミド樹脂、及び上記の充填材入りの樹脂等が
使用される。 As the seal ring resin, in addition to the above-mentioned polyimide resin, tetrafluoroethylene, polyacetal, phenol resin, polyester, polyamide-imide resin, and the above-mentioned filler-containing resin are used.
又、合口面傾斜角度は５゜〜85゜が望ましい。
これは５゜未満では切割加工が困難となり、85゜
を超えるとリング合口が突き当つた場合、リング
合口が上下方にずれ難くなつて、シールリングの
変形、折損の危険性がある。 Further, the inclination angle of the abutment surface is preferably 5° to 85°.
If it is less than 5 degrees, it will be difficult to cut, and if it exceeds 85 degrees, if the ring abutments butt against each other, it will be difficult for the ring abutments to shift upward or downward, and there is a risk of deformation or breakage of the seal ring.
第１図と第２図はシールリングの傾斜合口面に
おける合口隙間寸法Ｇの正数値（＋）、負数値
（−）の説明図、第３図はシールリングの傾斜合
口面が互いに当接してずれて溝の上下面にシール
リングの合口上下縁が衝接した状態を示す図、第
４図は油漏れ試験機の要部断面図、第５図は従来
品と本考案品を使用した場合の油漏れ量の経時変
化を示す図である。
１……シールリング、２……ハウジング、３…
…オイルシール、４……回転軸、ａ……油入口、
ｂ，b′……油漏れ出口、Ｃ……サイドクリアラン
ス、Ｇ……合口隙間寸法、θ……合口面傾斜角
度。
Figures 1 and 2 are illustrations of positive values (+) and negative values (-) of the abutment gap dimension G on the inclined abutment surfaces of the seal rings, and Fig. 3 is an illustration of the positive values (+) and negative values (-) of the abutment gap dimension G on the inclined abutment surfaces of the seal rings. A diagram showing the state in which the upper and lower edges of the abutment of the seal ring collide with the upper and lower surfaces of the groove due to misalignment. Figure 4 is a cross-sectional view of the main parts of the oil leak tester. Figure 5 is when the conventional product and the invented product are used. FIG. 3 is a diagram showing changes over time in the amount of oil leakage. 1... Seal ring, 2... Housing, 3...
...Oil seal, 4...Rotating shaft, a...Oil inlet,
b, b'...Oil leakage outlet, C...Side clearance, G...Abutment gap dimension, θ...Abutment surface inclination angle.
Claims (1)
合口隙間寸法Ｇが、次式 Ｏ＞Ｇ＞−Ｃ／ｔａｎθ （但しＣはシールリングのサイドクリアランス
寸法） を満足するように、合口面を互いに当接した油空
圧回転軸用樹脂製シールリング。[Claim for Utility Model Registration] The initial abutment gap dimension G of the abutment surface formed with a slope having an inclination angle θ satisfies the following formula O>G>-C/tanθ (where C is the side clearance dimension of the seal ring) A resin seal ring for hydraulic and pneumatic rotating shafts with abutment surfaces in contact with each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16262181U JPS5869154U (en) | 1981-11-02 | 1981-11-02 | Resin seal ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16262181U JPS5869154U (en) | 1981-11-02 | 1981-11-02 | Resin seal ring |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5869154U JPS5869154U (en) | 1983-05-11 |
| JPS6224869Y2 true JPS6224869Y2 (en) | 1987-06-25 |
Family
ID=29954930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16262181U Granted JPS5869154U (en) | 1981-11-02 | 1981-11-02 | Resin seal ring |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5869154U (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5850142Y2 (en) * | 1979-12-28 | 1983-11-15 | エヌオーケー株式会社 | sliding ring |
-
1981
- 1981-11-02 JP JP16262181U patent/JPS5869154U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5869154U (en) | 1983-05-11 |
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