JPH0244073Y2 - - Google Patents
Info
- Publication number
- JPH0244073Y2 JPH0244073Y2 JP19145185U JP19145185U JPH0244073Y2 JP H0244073 Y2 JPH0244073 Y2 JP H0244073Y2 JP 19145185 U JP19145185 U JP 19145185U JP 19145185 U JP19145185 U JP 19145185U JP H0244073 Y2 JPH0244073 Y2 JP H0244073Y2
- Authority
- JP
- Japan
- Prior art keywords
- gear pump
- polymer
- seal
- molten polymer
- present
- 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
Landscapes
- Rotary Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
本考案は、溶融ポリマーを計量、移送するラビ
リンスシール方式のギアポンプに関するものであ
る。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a labyrinth seal type gear pump that measures and transfers molten polymer.
（従来の技術）
従来、溶融ポリマーを計量、移送する手段とし
てギアポンプが広く使用されているが、大型のギ
アポンプでは、回転部分（シヤフト）と固定部分
（軸受）のシールが困難であつた。(Prior Art) Conventionally, gear pumps have been widely used as a means for metering and transferring molten polymer, but with large gear pumps, it has been difficult to seal the rotating part (shaft) and fixed part (bearing).
すなわち、大型のギアポンプでは、芯ずれが生
じやすく、平滑な金属面同士でシールするメタル
タツチ方式では焼き付きが発生する。 That is, in large gear pumps, misalignment is likely to occur, and in the metal touch system, which seals between smooth metal surfaces, seizure occurs.
そこで、フツ素樹脂（ポリテトラフルオロエチ
レン）やシリコーン樹脂等の摺動材を用いたグラ
ンドパツキンによるシール方式が採られることが
多い（例えば、実公昭52−34411号）。しかし、こ
の方式では、パツキンが摩耗しやすく、パツキ
ン摩耗物の製品ポリマーへの混入、シール不良
によるポリマーの外部への漏れ等のトラブルが発
生するという問題があつた。 Therefore, a sealing method using a gland packing using a sliding material such as fluororesin (polytetrafluoroethylene) or silicone resin is often adopted (for example, Utility Model Publication No. 52-34411). However, with this method, there are problems in that the packing is easily worn out, and troubles such as contamination of the worn packing into the product polymer and leakage of the polymer to the outside due to poor sealing occur.
また、好ましいシール方式として、ラブリンス
シール方式がある。しかし、この方式の溶融ポリ
マー用ギアポンプにおいては、ギアポンプ自体の
温度設定やポリマーの溶融粘度によつては、シー
ル部分からのポリマーの外部への漏れが著しくな
つたり、逆にシール部分にポリマーが入り込ま
ず、焼き付きが発生したりするという問題があつ
た。 Furthermore, a preferred sealing method is a labrinth sealing method. However, with this type of gear pump for molten polymer, depending on the temperature setting of the gear pump itself and the melt viscosity of the polymer, the polymer may leak significantly from the seal to the outside, or conversely, the polymer may enter the seal. However, there was a problem that burn-in occurred.
（考案が解決しようとする問題点）
本考案は、ラビリンスシール方式の溶融ポリマ
ー用ギアポンプにおいて、溶融ポリマーのシール
部への漏れ込み量を適度に調整することができ、
外部へのポリマーの漏れ量が少なく、かつ焼き付
きによるトラブルが発生しないギアポンプを提供
しようとするものである。(Problems to be Solved by the Invention) The present invention is a gear pump for molten polymer using a labyrinth seal type, in which the amount of molten polymer leaking into the seal portion can be appropriately adjusted.
The purpose of the present invention is to provide a gear pump that has a small amount of polymer leaking to the outside and that does not cause troubles due to seizure.
（問題点を解決するための手段）
本考案は、上記の目的を達成するもので、その
要旨は、ラビリンスシール方式の溶融ポリマー用
ギアポンプにおいて、シール部分に温度検出端を
設けるとともに、軸受部の大気開放端に冷却ジヤ
ケツトを設けたことを特徴とする溶融ポリマー用
ギアポンプにある。(Means for Solving the Problems) The present invention achieves the above object, and its gist is that a labyrinth seal type gear pump for molten polymer is provided with a temperature detection end in the seal part, and a temperature detection end in the bearing part. A gear pump for molten polymer characterized in that a cooling jacket is provided at an end open to the atmosphere.
以下、本考案を図面を参照しながら具体的に説
明する。 Hereinafter, the present invention will be explained in detail with reference to the drawings.
第１図は、本考案のギアポンプのシール部分を
示す断面図である。 FIG. 1 is a sectional view showing a seal portion of the gear pump of the present invention.
第１図において、１はシヤフト、２はギア、３
はスリーブカラー、４はネツクブツシユ、５は加
熱ジヤケツト、６は冷却ジヤケツト、７は温度調
節計、８は温度検出端、９はコントロール弁であ
る。 In Figure 1, 1 is the shaft, 2 is the gear, and 3 is the shaft.
4 is a sleeve collar, 4 is a neck bushing, 5 is a heating jacket, 6 is a cooling jacket, 7 is a temperature controller, 8 is a temperature detection end, and 9 is a control valve.
本考案のギアポンプは、ラビリンスシール方式
のものであり、ネツクブツシユ４は軸受側に取り
つけられ、スリーブカラー３に接する面には回転
方向と逆の方向にネジが切られている。ネツクブ
ツシユ４とスリーブカラー３とのクリアランスは
ネジの山部で0.2〜0.4mm、谷部で0.4〜0.6mm程度
であり、この間隙にポリマーが入り込みシールさ
れるようになつている。 The gear pump of the present invention is of a labyrinth seal type, and the neck bush 4 is attached to the bearing side, and the surface in contact with the sleeve collar 3 is threaded in the direction opposite to the direction of rotation. The clearance between the thread bushing 4 and the sleeve collar 3 is approximately 0.2 to 0.4 mm at the thread crest and 0.4 to 0.6 mm at the trough, and the polymer enters this gap to form a seal.
溶融ポリマーは、シヤフト１で回転駆動される
ギア２のある計量部からネツクブツシユ４とスリ
ーブカラー３との間隙１０に一部漏れ込んでくる
が、加熱ジヤケツト５で加熱された部分から冷却
ジヤケツト６で冷却された部分に近づくにつれて
温度が下がり、流動性が低下するため、良好にシ
ールされるのである。 A portion of the molten polymer leaks into the gap 10 between the neck bushing 4 and the sleeve collar 3 from the metering section with the gear 2 which is rotatably driven by the shaft 1, but it flows from the portion heated by the heating jacket 5 to the cooling jacket 6. The closer you get to the cooled area, the lower the temperature and the lower the fluidity, resulting in a better seal.
本考案のギアポンプにおいては、シール部分に
温度検出端８が設けられており、これによりシー
ル部分の温度を測定して、予め求めておいた各ポ
リマー銘柄における最もシール性が良好で、焼き
付きトラブル等の発生しない温度となるように、
温度調節計７と連動したコントロール弁９で水、
空気等の冷媒の量を調節することにより、極めて
良好な操業性が得られるのである。 In the gear pump of the present invention, a temperature detection end 8 is provided in the seal portion, which measures the temperature of the seal portion and determines the best sealing performance for each polymer brand determined in advance, and prevents seizure problems. so that the temperature is such that no
Water is supplied by a control valve 9 linked to a temperature controller 7.
By adjusting the amount of refrigerant such as air, extremely good operability can be obtained.
（考案の効果）
本考案によれば、ラビリンスシール方式の溶融
ポリマー用ギアポンプにおいて、溶融ポリマーの
シール部分への漏れ込み量を適度に調整すること
ができ、シール性が良好で、かつ焼き付きによる
トラブル等が発生しないギアポンプが提供され
る。(Effects of the invention) According to the invention, in a labyrinth seal type gear pump for molten polymer, the amount of molten polymer leaking into the seal part can be adjusted appropriately, the sealing performance is good, and there is no problem due to seizure. A gear pump that does not generate such problems is provided.
第１図は、本考案のギアポンプのシール部分を
示す断面図である。
１はシヤフト、２はギア、３はスリーブカラ
ー、４はネツクブツシユ、５は加熱ジヤケツト、
６は冷却ジヤケツト、７は温度調節計、８は温度
検出端、９はコントロール弁。
FIG. 1 is a sectional view showing a seal portion of the gear pump of the present invention. 1 is the shaft, 2 is the gear, 3 is the sleeve collar, 4 is the neck bush, 5 is the heating jacket,
6 is a cooling jacket, 7 is a temperature controller, 8 is a temperature detection end, and 9 is a control valve.
Claims (1)
ンプにおいて、シール部分に温度検出端を設ける
とともに、軸受部の大気開放端に冷却ジヤケツト
を設けたことを特徴とする溶融ポリマー用ギアポ
ンプ。 A gear pump for molten polymer of a labyrinth seal type, characterized in that a temperature detection end is provided at the seal portion and a cooling jacket is provided at the end of the bearing portion that is open to the atmosphere.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19145185U JPH0244073Y2 (en) | 1985-12-12 | 1985-12-12 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19145185U JPH0244073Y2 (en) | 1985-12-12 | 1985-12-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6298786U JPS6298786U (en) | 1987-06-23 |
| JPH0244073Y2 true JPH0244073Y2 (en) | 1990-11-22 |
Family
ID=31145607
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19145185U Expired JPH0244073Y2 (en) | 1985-12-12 | 1985-12-12 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0244073Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2800834B2 (en) * | 1989-01-31 | 1998-09-21 | 株式会社島津製作所 | Gear pump |
-
1985
- 1985-12-12 JP JP19145185U patent/JPH0244073Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6298786U (en) | 1987-06-23 |
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