JP2957393B2 - Rotary valve shaft sealing method - Google Patents
Rotary valve shaft sealing methodInfo
- Publication number
- JP2957393B2 JP2957393B2 JP27348493A JP27348493A JP2957393B2 JP 2957393 B2 JP2957393 B2 JP 2957393B2 JP 27348493 A JP27348493 A JP 27348493A JP 27348493 A JP27348493 A JP 27348493A JP 2957393 B2 JP2957393 B2 JP 2957393B2
- Authority
- JP
- Japan
- Prior art keywords
- rotary valve
- shaft sealing
- supply hole
- gas supply
- shaft
- 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 - Lifetime
Links
- 238000000034 method Methods 0.000 title description 7
- 238000007789 sealing Methods 0.000 title description 7
- 239000003566 sealing material Substances 0.000 claims description 13
- 238000007664 blowing Methods 0.000 claims 1
- 239000007789 gas Substances 0.000 description 19
- 239000000843 powder Substances 0.000 description 8
- 238000012856 packing Methods 0.000 description 7
- 239000002245 particle Substances 0.000 description 7
- 230000008439 repair process Effects 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 210000004907 gland Anatomy 0.000 description 5
- 239000008187 granular material Substances 0.000 description 5
- 229920005668 polycarbonate resin Polymers 0.000 description 5
- 239000004431 polycarbonate resin Substances 0.000 description 5
- 230000002159 abnormal effect Effects 0.000 description 4
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 3
- 230000005856 abnormality Effects 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 239000010425 asbestos Substances 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229910052895 riebeckite Inorganic materials 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 235000014593 oils and fats Nutrition 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
Landscapes
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明はロータリーバルブの軸封
方法に関する。更に詳しくは、製品中に異物の混入がな
く、異音発生がなく且つ補修不要のロータリーバルブの
軸封方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for sealing a shaft of a rotary valve. More specifically, the present invention relates to a method for sealing a shaft of a rotary valve that does not include foreign matter in a product, does not generate abnormal noise, and does not require repair.
【０００２】[0002]
【従来の技術】ロータリーバルブはシール性と定量供給
が要求される箇所に使用されるバルブであり、種々な条
件の下で無機質や有機質の粉粒体の取扱いに用いられて
いる。ロータリーバルブの軸封材としてはフッ素樹脂含
浸石綿格子編パッキン等が用いられており、これらは比
較的脆いので耐摩耗性を付与するためにグリス等の潤滑
作用を有するものを塗布して使用されている。しかしな
がら、高温下ではあまり効果がなく、異物になって製品
を汚染する原因の一つになっている。特に粉粒体として
ポリカーボネート樹脂のような樹脂粉粒体を使用し、か
かる粉粒体が高温下で軸封材と軸の間に流入すると、摩
擦熱により溶融変質して摩耗を促進し、発生した金属
粉、軸封材粉、変質樹脂粉等が製品中に混入し、汚染さ
れた製品は商品価値が著しく低下し、例えばディスク、
フイルム、光ファイバー、レンズ等の精密光学製品等に
は使用できない。また、粉粒体がグランドの間隙に流入
すると異物発生のみならず甲高い異音を発生し、騒音の
一つになっている。かかる異物や騒音防止のため頻繁に
補修が必要になる。補修の基準は、異音の発生、外部へ
の粉粒体の洩れ、粉粒体の汚染状況等により定めるが、
これらの異常を放置し、そのまま運転し続けるとロータ
リーバルブの駆動モーターの停止や焼損が発生する。異
常により軸封材を更新しても、異常が頻繁に再発するこ
とが多く、これに要する人件費及び工程停止による損失
は莫大なもので改善が切望されている。2. Description of the Related Art A rotary valve is a valve used in a place where a sealing property and a constant supply are required, and is used for handling inorganic and organic powders under various conditions. Fluororesin impregnated asbestos lattice knitted packing and the like are used as the shaft sealing material of the rotary valve, and since these are relatively brittle, they are used by applying a material that has a lubricating action such as grease to impart abrasion resistance. ing. However, it is not very effective at high temperatures and becomes one of the causes of contaminating products as foreign substances. In particular, resin particles such as polycarbonate resin are used as particles, and when such particles flow between the shaft sealing material and the shaft at high temperature, they are fused and deformed by frictional heat to promote wear, Metal powder, shaft sealing material powder, deteriorated resin powder, etc. are mixed into the product, and the contaminated product has a markedly reduced commercial value.
It cannot be used for precision optical products such as films, optical fibers, and lenses. In addition, when the granular material flows into the gap between the grounds, not only foreign substances are generated but also a high-pitched noise is generated, which is one of the noises. Frequent repair is required to prevent such foreign matter and noise. The repair standard is determined based on the generation of abnormal noise, leakage of the granular material to the outside, the state of contamination of the granular material, etc.
If these abnormalities are left unattended and the operation is continued, the drive motor of the rotary valve stops or burns out. Even if the shaft sealing material is renewed due to an abnormality, the abnormality often recurs frequently, and the labor cost required for this and the loss due to the stoppage of the process are enormous, and there is an urgent need for improvement.
【０００３】[0003]
【発明が解決しようとする課題】本発明の目的は、軸封
部における異物や騒音の発生がなく、補修不要のロータ
リーバルブの軸封方法を提供することである。SUMMARY OF THE INVENTION It is an object of the present invention to provide a method for sealing a rotary valve which does not require any repair and does not generate foreign matter or noise in the shaft sealing portion.
【０００４】本発明者は上記目的を達成せんとして種々
検討した結果、軸封材を充填する空間に、軸封材の代り
に空気を吹込むことにより、異物の大きな原因である軸
封材を使用せず、更に粉粒体のグランド部への流入を防
止できることを究明し、本発明を完成した。The inventor of the present invention has conducted various studies to achieve the above object. As a result, air was blown into the space filled with the shaft sealing material instead of the shaft sealing material to remove the shaft sealing material which is a major cause of foreign matter. The present invention was completed by investigating that it was possible to prevent the powder and granules from flowing into the ground portion without using the same.
【０００５】[0005]
【課題を解決するための手段】本発明は、ロータリーバ
ルブの軸封材充填用空間にガス供給孔を設け、該ガス供
給孔の開口部より内側の間隙を外側の間隙よりやや大き
くし、ガス供給孔より供給した清浄なガスが内側の間隙
を通ってバルブ内部に吹込むようになしたことを特徴と
するポリカーボネート樹脂粉粒体用ロータリーバルブの
軸封方法である。According to the present invention, a gas supply hole is provided in a space for filling a shaft sealing material of a rotary valve, and a gap inside the opening of the gas supply hole is made slightly larger than a gap outside the gas supply hole. A shaft sealing method for a rotary valve for polycarbonate resin particles, wherein a clean gas supplied from a supply hole is blown into a valve through an inner gap.
【０００６】本発明を図面により説明する。図１はロー
タリーバルブのグランド部の断面図であり、図中１は
軸、２はグランド、３はガス供給孔、４は軸封材充填用
空間、５は内側の間隙、６は外側の間隙、７及び８はパ
ッキンである。The present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view of a gland portion of a rotary valve. In FIG. 1, 1 is a shaft, 2 is a gland, 3 is a gas supply hole, 4 is a space for filling a shaft sealing material, 5 is an inner gap, and 6 is an outer gap. , 7 and 8 are packings.
【０００７】ガス供給孔３は従来軸封材を充填していた
空間４にガスを吹込むためのものであり、この空間４に
ガスを吹込める位置であれば任意の場所に設けることが
でき、一個乃至複数個設け、このガス供給孔３から吹込
まれたガスは内側の間隙５を通って製品側即ちバルブ内
部に流れ、粉粒体のグランド部への流入即ち内側の間隙
５への流入を防止する。The gas supply hole 3 is for injecting gas into the space 4 conventionally filled with the shaft sealing material. The gas supply hole 3 can be provided at any position as long as the gas can be blown into this space 4. The gas blown from the gas supply holes 3 flows through the inner gap 5 to the product side, that is, the inside of the valve, and prevents the powder from flowing into the ground portion, that is, into the inner gap 5. I do.
【０００８】ここで使用するガスは、例えば空気、窒素
ガス、炭酸ガス等製品粉粒体やロータリーバルブに悪影
響を及ぼさないガスであれば任意に使用できる。特に濾
過等により異物や油脂分を除去した清浄なガスが好まし
い。ガスの流速は、粉粒体の内側の間隙５への流入を防
止できる程度以上であればよく、通常内側の間隙５にお
ける流速が４ m／秒程度になるように吹込むのが好まし
い。The gas used here may be any gas, such as air, nitrogen gas, carbon dioxide gas, etc., as long as it does not adversely affect the product granules or rotary valve. In particular, a clean gas from which foreign substances and oils and fats have been removed by filtration or the like is preferable. The flow rate of the gas may be at least as high as the flow rate of the powder can be prevented from flowing into the inner gap 5, and it is generally preferable to blow the powder so that the flow rate in the inner gap 5 is about 4 m / sec.
【０００９】内側の間隙５は外側の間隙６よりやや大き
めにする必要がある。特に外側の間隙６は可及的に小さ
くすべきであり、通常０．１mm以下にするのが好まし
く、内側の間隙５は通常０．５mm程度にするのが好まし
い。パッキン７及び８は軸のガス封止材であり、潤滑
性、耐摩耗性、耐熱性を有する材質が好ましく、無機材
料、有機材料、これらを組合わせた材料のいずれでもよ
く、例えばテフロンは好例の一つである。The inner gap 5 must be slightly larger than the outer gap 6. In particular, the outer gap 6 should be as small as possible, and is usually preferably 0.1 mm or less, and the inner gap 5 is preferably about 0.5 mm. The packings 7 and 8 are gas sealing materials for the shaft, and are preferably made of a material having lubricity, abrasion resistance, and heat resistance, and may be any of an inorganic material, an organic material, and a combination thereof. one of.
【００１０】[0010]
【実施例】以下に実施例をあげて更に説明する。製品中
の異物検査は、ポリカーボネート樹脂粉粒体１００g を
塩化メチレン４００g に溶解し、目開き５０μm の濾材
で吸引濾過し、濾材上の異物を目視で数えた。EXAMPLES Examples will be further described below with reference to examples. In the inspection of foreign substances in the product, 100 g of the polycarbonate resin particles were dissolved in 400 g of methylene chloride, suction-filtered with a filter having openings of 50 μm, and the foreign substances on the filter were visually counted.
【００１１】[0011]
【実施例１】乾燥した１４５℃のポリカーボネート樹脂
粉粒体を軸径４５mmのロータリーバルブを取付けた貯槽
に連続して受入れる工程において、ロータリーバルブの
グランド部の内側の間隙５を０．５mm、外側の間隙６を
０．１mmに調整し、パッキン７に厚さ１mmのテフロン板
を用い、ガス供給孔３から濾過脱湿した空気を２ m3／
時間（内側の間隙５での流速４ m／秒）吹込んだ。運転
開始から３日目、１月目、１年目のポリカーボネート樹
脂粉粒体１kg中の異物数、異音発生回数、補修回数を表
１に示した。EXAMPLE 1 In a process of continuously receiving dried 145 ° C. polycarbonate resin particles in a storage tank equipped with a rotary valve having a shaft diameter of 45 mm, a gap 5 inside a gland portion of the rotary valve was set to 0.5 mm and an outer space was set to 0.5 mm. Is adjusted to 0.1 mm, a 1 mm-thick Teflon plate is used for the packing 7, and the air filtered and dehumidified from the gas supply hole 3 is discharged at 2 m 3 /
Time (flow rate 4 m / sec in the inner gap 5) was blown. Table 1 shows the number of foreign substances, the number of abnormal noises, and the number of repairs in 1 kg of the polycarbonate resin particles on the third day, the first month, and the first year from the start of operation.
【００１２】[0012]
【表１】 [Table 1]
【００１３】[0013]
【比較例１】ロータリーバルブのグランド部の空気シー
ルに代えて、フッ素樹脂バルフロン含浸石綿格子編パッ
キンを充填して実施例１と同様に連続運転し、結果を表
２に示した。COMPARATIVE EXAMPLE 1 A continuous operation was carried out in the same manner as in Example 1 except that the packing was filled with a fluororesin VALFLON-impregnated asbestos lattice knitted packing, instead of the air seal at the gland portion of the rotary valve.
【００１４】[0014]
【表２】 [Table 2]
【００１５】[0015]
【発明の効果】本発明によれば、ロータリーバルブの軸
封部からの異物の発生がなくなり、製品の汚染が著しく
抑制され、補修も年一回以下で済み、ロータリーバルブ
の停止による機会損失がなくなり、更にロータリーバル
ブの異音が発生せず快適な作業環境が得られる等、その
奏する効果は格別なものである。According to the present invention, the generation of foreign matter from the shaft seal portion of the rotary valve is eliminated, the contamination of the product is remarkably suppressed, the repair is performed once a year or less, and the opportunity loss due to the stoppage of the rotary valve is reduced. There is no special effect, such as a comfortable working environment is obtained without generating abnormal noise of the rotary valve.
【図１】本発明のロータリーバルブのグランド部の断面
図FIG. 1 is a sectional view of a gland portion of a rotary valve according to the present invention.
１ 軸 ２ グランド ３ ガス供給孔 ４ 軸封材充填用空間 ５ 内側の間隙 ６ 外側の間隙 ７、８ パッキン DESCRIPTION OF SYMBOLS 1 Shaft 2 Ground 3 Gas supply hole 4 Shaft sealing material filling space 5 Inner gap 6 Outer gap 7, 8 Packing
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 実開 昭59−107383（ＪＰ，Ｕ) 実開 昭57−182664（ＪＰ，Ｕ) 実公 昭43−8832（ＪＰ，Ｙ１) 実公 昭49−22914（ＪＰ，Ｙ１) 実公 昭40−15230（ＪＰ，Ｙ１) (58)調査した分野(Int.Cl.6，ＤＢ名) F16J 15/40 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-59-107383 (JP, U) JP-A-57-182664 (JP, U) JP-A 43-8832 (JP, Y1) JP-A 49- 22914 (JP, Y1) J. 40-15230 (JP, Y1) (58) Field surveyed (Int. Cl. 6 , DB name) F16J 15/40
Claims (1)
ガス供給孔を設け、該ガス供給孔の開口部より内側の間
隙を外側の間隙よりやや大きくし、ガス供給孔より供給
した清浄なガスが内側の間隙を通ってバルブ内部に吹込
むようになしたことを特徴とするポリカーボネート樹脂
粉粒体用ロータリーバルブの軸封方法。A gas supply hole is provided in a space for filling a shaft sealing material of a rotary valve, a gap inside the opening of the gas supply hole is made slightly larger than a gap outside the gas supply hole, and clean gas supplied from the gas supply hole is provided. Characterized by blowing into the inside of the valve through a gap inside the shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27348493A JP2957393B2 (en) | 1993-11-01 | 1993-11-01 | Rotary valve shaft sealing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27348493A JP2957393B2 (en) | 1993-11-01 | 1993-11-01 | Rotary valve shaft sealing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07127748A JPH07127748A (en) | 1995-05-16 |
| JP2957393B2 true JP2957393B2 (en) | 1999-10-04 |
Family
ID=17528555
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27348493A Expired - Lifetime JP2957393B2 (en) | 1993-11-01 | 1993-11-01 | Rotary valve shaft sealing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2957393B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007239933A (en) * | 2006-03-10 | 2007-09-20 | Agc Seimi Chemical Co Ltd | Shaft seal device for powder processing device |
| CN104235379A (en) * | 2013-06-17 | 2014-12-24 | 周奎田 | Sealing dust-proof air jacket for moving shaft |
| CN104214345A (en) * | 2014-06-20 | 2014-12-17 | 辽阳泵业密封有限公司 | Multi-level sealing device |
| CN111558499A (en) * | 2020-06-05 | 2020-08-21 | 广州弘亚数控机械股份有限公司 | Gluing device |
-
1993
- 1993-11-01 JP JP27348493A patent/JP2957393B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07127748A (en) | 1995-05-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5735603A (en) | Horizontal mixer apparatus and method with improved shaft and seal structure | |
| DE69516717T2 (en) | VERTICAL AXLE WHEEL LOCK | |
| EP0344532A2 (en) | Sealing device of the bearing of a rotating shaft with its drive unit | |
| JP2957393B2 (en) | Rotary valve shaft sealing method | |
| CN102954217A (en) | Seal for sealing a sealed gap and method for producing same | |
| WO2010034605A1 (en) | Arrangement comprising a shaft seal | |
| DE69802722T2 (en) | Bearing seal with even liquid flushing | |
| CA2646941A1 (en) | Cellular encasement protection system for roller assembly | |
| DE112017003319T5 (en) | Mechanical seal | |
| US7281546B2 (en) | Thread protection system with weather barrier | |
| CN1060702A (en) | Rotate shaft seal | |
| AU2006268064A1 (en) | Pyrolysis system | |
| DE2538793A1 (en) | CIRCULATING SAND BLAST FAN HEAD | |
| US20170045145A1 (en) | Seals | |
| HUE030209T2 (en) | Method for the manufacture of extended steel products. | |
| DE19528018B4 (en) | Plant for the thermal treatment of organic matter containing materials for the thermal disposal of waste, domestic, industrial and / or hazardous waste, chemical residues and / or the like | |
| US6871857B2 (en) | Mechanical sealing apparatus | |
| DE102004052684A1 (en) | Storage arrangement for mobile storage of machine part, comprises cartridge seal for sealing interior zone of bearing assembly in ambient area | |
| EP0690204A2 (en) | Steamturbine with at least two seals in the casing for sealing the same | |
| DE10103259C2 (en) | Process for sealing the drive shafts of mixer tools against the mixer housing and shaft seal for carrying out the process | |
| EP1012081B1 (en) | Shaft seal, especially for screw conveyors for powdered material | |
| EP0779457B1 (en) | Mechanical seal | |
| EP0949501A2 (en) | Protective housing for observation devices | |
| EP0035092A1 (en) | Rotating mechanical seal with spring bellows | |
| DE102022001932A1 (en) | Damped solid |