JPH084662A - Gear pump - Google Patents
Gear pumpInfo
- Publication number
- JPH084662A JPH084662A JP13608194A JP13608194A JPH084662A JP H084662 A JPH084662 A JP H084662A JP 13608194 A JP13608194 A JP 13608194A JP 13608194 A JP13608194 A JP 13608194A JP H084662 A JPH084662 A JP H084662A
- Authority
- JP
- Japan
- Prior art keywords
- heater
- flow passage
- casing
- refrigerant flow
- refrigerant
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
- F04C15/0096—Heating; Cooling
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ケミカル液や、押出成
形ラインで扱う素材等のように、熱的影響を受け易い流
体を適正に扱うことができるようにした歯車ポンプに関
するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gear pump capable of properly handling a fluid that is easily affected by heat, such as a chemical liquid or a material used in an extrusion molding line.
【０００２】[0002]
【従来の技術】歯車ポンプは、ポンプ本体内に一対の歯
車を噛合状態で収容し、両歯車の同期逆回転動作を利用
して、吸込口から吸込んだ流体を歯先とポンプ本体内周
との間に閉成される容積空間に閉じ込めて、吐出口に向
かって移送する作用を営むものである。2. Description of the Related Art A gear pump accommodates a pair of gears in mesh with each other in a pump body, and utilizes a synchronous reverse rotation operation of both gears so that a fluid sucked from a suction port is brought into contact with a tooth tip and an inner circumference of the pump body. It is confined in the volume space that is closed between the two and carries out the action of transferring toward the discharge port.
【０００３】ところで、例えば流体としてプラスチック
等の溶融樹脂を取り扱う場合に、ポンプ本体内の温度が
低いと、樹脂がポンプ本体内を通過する間に熱的影響を
受けて変質、劣化し、最終製品の品質低下を惹起する。
そのため、従来においては前記ポンプ本体にヒータを内
設し、このヒータによりポンプ本体を加熱して、溶融樹
脂の温度が通過時に一定温度以下に降下しないようにし
ている。By the way, when a molten resin such as plastic is used as a fluid, if the temperature inside the pump body is low, the resin is thermally affected and deteriorates or deteriorates while passing through the inside of the pump body, and the final product. Cause deterioration of quality.
Therefore, conventionally, a heater is provided inside the pump body, and the heater heats the pump body so that the temperature of the molten resin does not drop below a certain temperature when passing through.
【０００４】[0004]
【発明が解決しようとする課題】ところで、溶融樹脂は
温度上昇によっても変質や劣化を惹起する場合がある。
しかし、従来においては、溶融樹脂の温度降下を抑える
ことに主眼が置かれ、樹脂の温度上昇に対しては特に配
慮がされていない。ポンプ本体の過熱が明らになった場
合にヒータの電源を適宜落としてポンプ本体のそれ以上
の加熱を防いでいるだけである。しかし、このような構
成のみでは、適正な品質管理は望めない。すなわち、か
かる構成においては、ヒータＯＦＦ後にポンプ本体は自
然冷却に委ねられるわけであるが、ポンプ本体にはある
程度の熱容量があるため、ヒータＯＦＦから温度降下ま
でに時間を要する。そのため、その間にポンプ本体を通
過した溶融プラスチックが変質を惹起することがある。
また、ヒータの電源を落としても、その後暫くは予熱に
よりポンプ温度が上昇することがあり、そのヒステリシ
スのために２４０〜３００℃といった大雑把な調整を行
うことしかできない。したがって、特に取り扱う流体の
適正温度幅が狭い場合には、十分に注意を払っても装置
上変質等の不具合を効果的に防止するには限界がある。By the way, the molten resin may be deteriorated or deteriorated even when the temperature rises.
However, in the past, the focus has been on suppressing the temperature drop of the molten resin, and no particular consideration has been given to the temperature rise of the resin. When the pump body becomes overheated, the heater power is appropriately turned off to prevent further heating of the pump body. However, proper quality control cannot be expected with such a configuration alone. That is, in such a configuration, the pump body is naturally cooled after the heater is turned off, but since the pump body has a certain amount of heat capacity, it takes time from the heater off to the temperature drop. Therefore, the molten plastic that has passed through the pump body during that time may cause alteration.
Further, even if the heater power is turned off, the pump temperature may rise due to preheating for a while after that, and due to the hysteresis, only rough adjustment of 240 to 300 ° C. can be performed. Therefore, especially when the proper temperature range of the fluid to be handled is narrow, there is a limit in effectively preventing a defect such as alteration on the device even if sufficient attention is paid.
【０００５】本発明は、このような課題に着目してなさ
れたものであって、熱的影響を受け易い流体を適正に扱
えるようにした歯車ポンプを提供することを目的として
いる。The present invention has been made in view of these problems, and an object thereof is to provide a gear pump capable of properly handling a fluid that is easily affected by heat.
【０００６】[0006]
【課題を解決するための手段】本発明は、かかる目的を
達成するために、次のような構成を採用したものであ
る。In order to achieve the above object, the present invention employs the following configuration.
【０００７】すなわち、本発明に係る歯車ポンプは、吸
込口からポンプ本体内に導入した流体を、ポンプ本体に
内設した一対の歯車により吐出口に向かって移送するも
のにおいて、前記ポンプ本体に、ヒータと、冷媒流通路
とを設け、前記ヒータおよび前記冷媒流通路に導入され
る冷媒の作動状態を併用または切り換えることによりポ
ンプ本体内を略一定温度に保持することを特徴とする。That is, in the gear pump according to the present invention, the fluid introduced from the suction port into the pump body is transferred toward the discharge port by a pair of gears provided in the pump body. A heater and a refrigerant flow passage are provided, and the inside of the pump body is maintained at a substantially constant temperature by using or switching the operating states of the heater and the refrigerant introduced into the refrigerant flow passage.
【０００８】[0008]
【作用】このような構成のものであれば、ヒータの通電
状態と、冷媒流通路への冷媒の導入状態とを適宜切り換
えることで、ポンプ本体内の温度を常時最適値の近傍に
保持することができる。また、仮に最適値との間に偏差
があっても、本発明はポンプ本体内を加熱のみならず積
極的に冷却する構成を併用しているため短時間のうちに
最適値近傍にコントロールすることが容易になる。した
がって、流体が熱的影響を受けやすく、許容温度幅の狭
いものであっても、かかる流体をポンプ本体内を通過す
る間に適温に保って変質等の発生を有効に防ぐことがで
きる。With such a structure, the temperature inside the pump body is always kept near the optimum value by appropriately switching the energization state of the heater and the introduction state of the refrigerant into the refrigerant flow passage. You can Further, even if there is a deviation from the optimum value, the present invention uses a configuration in which not only the inside of the pump body is actively cooled but also the inside of the pump body is actively cooled. Will be easier. Therefore, even if the fluid is easily affected by heat and has a narrow allowable temperature range, it is possible to effectively prevent the deterioration of the fluid by keeping the fluid at an appropriate temperature while passing through the pump body.
【０００９】特に、本発明は冷媒流通路を採用している
ため、ポンプ本体に対して通路の形成位置や数に自由度
があり、所望の冷却効果が得られる態様で冷媒を引き回
すことが容易になる。In particular, since the present invention employs the refrigerant flow passage, there is a degree of freedom in the formation position and the number of passages with respect to the pump body, and it is easy to draw the refrigerant around in a manner that a desired cooling effect can be obtained. become.
【００１０】[0010]
【実施例】以下、本発明の一実施例を、図１〜図５を参
照して説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.
【００１１】この歯車ポンプは、流体としてポリマー等
の溶融プラスチックを取り扱うものである。歯車ポンプ
は、図１および図２に示すように、ポンプ本体たるケー
シング１の両側開口端にフロントカバー２およびリヤカ
バー３を添設し、ケーシング１内に一対の平歯車４ａ、
４ｂを噛合状態で収容している。また、その一方の歯車
４ａを支持する駆動軸５ａと、他方の歯車４ｂを支持す
る従動軸５ｂとを、歯車４ａ、４ｂの側板を兼ねる軸受
６ａ、６ｂに回転自由に支承させている。前記ケーシン
グ１には、歯車４ａ、４ｂの歯が漸次離反する側に吸込
口ＩＮが開口し、漸次噛合する側に吐出口ＯＵＴが開口
している。駆動軸５ａはフロントカバー２を貫通して外
部に延出させてあり、その先端に図示しない駆動機が接
続される。この駆動機を作動させ、両歯車４ａ、４ｂを
同期逆回転動作させたときに、吸込口ＩＮから吸い込ん
だ溶融プラスチックを歯先とケーシング内周との間に形
成される容積空間に閉じ込め、吐出口ＯＵＴに向かって
移送する作用を営むようになっている。なお、前記軸受
６ａ、６ｂの内周には軸方向に伸びる溝６ａ1 、６ｂ1
が設けられ、ケーシング１内に導入された溶融プラスチ
ックの一部は歯車側面等からこれらの溝６ａ1 、６ｂ1
に流出した後、軸方向に流通しながらこれらの軸受６
ａ、６ｂを潤滑する。This gear pump handles molten plastic such as polymer as a fluid. As shown in FIGS. 1 and 2, the gear pump has a front cover 2 and a rear cover 3 attached to both side open ends of a casing 1 as a pump main body, and a pair of spur gears 4a in the casing 1
4b is accommodated in a meshed state. A drive shaft 5a that supports one gear 4a and a driven shaft 5b that supports the other gear 4b are rotatably supported by bearings 6a and 6b that also serve as side plates of the gears 4a and 4b. In the casing 1, the suction port IN is opened on the side where the teeth of the gears 4a and 4b are gradually separated, and the discharge port OUT is opened on the side where the teeth are gradually meshed. The drive shaft 5a penetrates the front cover 2 and extends to the outside, and a drive machine (not shown) is connected to the tip of the drive shaft 5a. When this drive machine is operated and both gears 4a, 4b are operated to rotate in reverse synchronously, the molten plastic sucked from the suction port IN is confined in the volume space formed between the tooth tip and the inner circumference of the casing, and is discharged. It is designed to carry out the action of transferring to the outlet OUT. In addition, grooves 6a 1 and 6b 1 extending in the axial direction are formed on the inner circumferences of the bearings 6a and 6b.
Is provided, and a part of the molten plastic introduced into the casing 1 is provided in these grooves 6a 1 and 6b 1 from the side surface of the gear or the like.
These bearings 6 flow out in the axial direction and then flow in the axial direction.
Lubricate a and 6b.
【００１２】一方、前記ケーシング１内には、ヒータ７
と、冷媒流通路８とが設けてある。ヒータ７は、ロッド
状のカートリッジヒータで、ケーシング１に穿設した孔
１ａにこのカートリッジヒータ７を挿入して埋設してい
る。また、前記ケーシング１の六面に、一方の面から対
向する面に向かってそれぞれドリルにより孔１ｂを打ち
抜き、あるいは途中まで穿設して、それらの孔１ｂをケ
ーシング１の内部において図３に示すように略立方体状
に交叉させ、前記冷媒流通路８を形成している。すなわ
ち、その立方体状の格子の中に両歯車４ａ、４ｂがほぼ
すっぽり納まっている状態にする。そして、各孔１ｂの
うち２箇所の開口部８ａ、８ｂを除く開口部の全てに、
冷媒流通路８の交叉部を塞がないようにして盲プラグを
装着している。その２箇所の開口部のうち、一方の開口
部８ａは図５に示すように吸込口ＩＮ側における面の隅
部１箇所にあって冷媒入口をなし、他方の開口部８ｂは
吐出口ＯＵＴ側における面の対角側隅部１箇所にあって
冷媒出口をなす。On the other hand, a heater 7 is provided in the casing 1.
And a refrigerant flow passage 8 are provided. The heater 7 is a rod-shaped cartridge heater, and the cartridge heater 7 is inserted and embedded in a hole 1 a formed in the casing 1. Further, on the six surfaces of the casing 1, holes 1b are punched or drilled halfway from one surface to the opposite surface, respectively, and the holes 1b are shown inside the casing 1 in FIG. Thus, the refrigerant flow passages 8 are formed by intersecting each other in a substantially cubic shape. That is, both gears 4a and 4b are almost completely accommodated in the cubic lattice. Then, in each of the holes 1b, in all of the openings except the openings 8a and 8b at two locations,
A blind plug is attached so that the intersection of the refrigerant flow passage 8 is not blocked. Of the two openings, one opening 8a serves as a refrigerant inlet at one corner of the surface on the suction inlet IN side as shown in FIG. 5, and the other opening 8b serves as the discharge outlet OUT side. A refrigerant outlet is provided at one corner on the diagonal side of the plane.
【００１３】さらに本実施例では、カバー２、３に対し
ても、その四面において一方の面から対向する面に向か
って孔２ａ、３ａを打ち抜き、あるいは途中まで穿設し
て、それらの孔２ａ、３ａを図４に示すように内部で井
桁状に交叉させ、前記とは異なる冷媒流通路９を形成し
ている。すなわち、軸受６ａ、６ｂを軸方向に投影した
際にその投影像が井桁の中にほぼすっぽり納まっている
状態にする。そして、各孔のうち２箇所の開口部９ａ、
９ｂを除く開口部の全てに、その交叉部を塞がないよう
にして盲プラグを装着している。その２箇所の開口部の
うち、一方の開口部９ａは図５に示すように吸込口ＩＮ
側における面の下部にあって冷媒入口をなし、他方の開
口部９ｂは吐出口ＯＵＴ側における面の上部にあって冷
媒出口をなす。Further, in the present embodiment, holes 2a and 3a are punched out from one of the four faces of the covers 2 and 3 toward the opposite faces, or the holes 2a are formed in the middle. As shown in FIG. 4, 3a are crossed in a cross shape inside to form a refrigerant flow passage 9 different from the above. In other words, when the bearings 6a and 6b are projected in the axial direction, the projected images are almost completely accommodated in the cross girder. And, two openings 9a of each hole,
Blind plugs are attached to all the openings except 9b so as not to block the intersections. Of the two openings, one opening 9a has a suction port IN as shown in FIG.
Side is a refrigerant inlet in the lower part of the surface, and the other opening 9b is a refrigerant outlet in the upper part of the surface on the outlet OUT side.
【００１４】使用時には前記各ヒータ７を図示しない電
源に接続し、前記冷媒流通路８の入口８ａと出口８ｂの
間、および、冷媒流通路９の入口９ａと出口９ｂの間に
図示しない外部冷媒供給回路を介挿する。At the time of use, each heater 7 is connected to a power source (not shown), and an external refrigerant (not shown) is provided between the inlet 8a and the outlet 8b of the refrigerant flow passage 8 and between the inlet 9a and the outlet 9b of the refrigerant flow passage 9. Insert the supply circuit.
【００１５】なお、ポンプ本体１の適宜の位置には温度
センサが設けられ、そのセンサから溶融プラスチックの
温度が取り出される。そして、その検出温度と、予め定
めた設定温度（例えば２６０〜２７０℃）とを比較し、
前者が後者を下回るときにはヒータをＯＮにし、上回る
ときには外部冷媒供給回路のバルブをＯＮにするなどの
制御を図示しない制御盤を通じて行う。A temperature sensor is provided at an appropriate position of the pump body 1, and the temperature of the molten plastic is taken out from the sensor. Then, the detected temperature is compared with a preset temperature (for example, 260 to 270 ° C.),
When the former is below the latter, the heater is turned on, and when it is above the latter, control such as turning on the valve of the external refrigerant supply circuit is performed through a control panel (not shown).
【００１６】このような構成に加えて、本実施例は、前
記駆動軸５ａの一端部のみならず、その他端部、さらに
は前記従動軸５ｂの両端部をもそれぞれカバー２、３を
貫通して外部に延出させてあり、全てのカバー貫通部
に、軸封機構１０を構成している。この軸封機構１０
は、軸５ａ、６ａの外周と端板１０ａの貫通孔１０ｂの
内周との間に適度な寸法の環状隙間を形成し、この環状
隙間を軸方向に光学的に不透明にするラビリンスを前記
端板貫通孔１０ｂの内周に形成したものであって、前述
した冷媒流通路９を流れる冷媒の冷熱がこの環状隙間の
内方端側に作用する。また、この環状隙間の外方端側に
おいて前記端板１０ａに別異の冷媒流通路１０ｃを形成
し、環状隙間の外方端側に冷媒の冷熱が作用する。これ
らの軸封装置１０により、軸５ａ、５ｂとケーシング１
とが非接触であるにも拘らず、歯車４ａ、４ｂの側面か
ら漏出し軸受溝６ａ1 、６ｂ1 を通過して環状隙間に侵
出した溶融プラスチックは、その環状隙間において部分
的に固化し、微量づつ外部放出されながらシール効果を
維持的に発揮する。In addition to the above construction, in this embodiment, not only one end of the drive shaft 5a but also the other end thereof and further both ends of the driven shaft 5b penetrate the covers 2 and 3, respectively. The shaft sealing mechanism 10 is formed in all the cover penetrating portions. This shaft seal mechanism 10
Forms an annular gap of appropriate size between the outer periphery of the shafts 5a and 6a and the inner periphery of the through hole 10b of the end plate 10a, and the labyrinth that makes the annular gap optically opaque in the axial direction is formed at the end. It is formed on the inner circumference of the plate through hole 10b, and the cold heat of the refrigerant flowing through the refrigerant flow passage 9 acts on the inner end side of this annular gap. Further, a different refrigerant flow passage 10c is formed in the end plate 10a on the outer end side of the annular gap, and the cold heat of the refrigerant acts on the outer end side of the annular gap. With these shaft sealing devices 10, the shafts 5a and 5b and the casing 1 are
Doo is despite a non-contact, fused plastic gears 4a, leaks from the sides of 4b passes through the bearing grooves 6a 1, 6b 1 and leach into the annular gap is partially solidified in the annular gap , A small amount is released to the outside while maintaining the sealing effect.
【００１７】以上のような構成の歯車ポンプであれば、
ヒータ７への通電状態と、冷媒流通路８への冷媒の導入
状態とを適宜切り換えることで、特に溶融プラスチック
が通過する歯車４ａ、４ｂの周辺におけるケーシング１
内の温度を常時最適値の近傍に保持することができる。
また、仮に最適値との間に偏差があっても、本実施例は
ケーシング１内を加熱のみならず冷却をも積極的に行う
構成によって、短時間のうちに最適値にコントロールす
ることが容易になる。したがって、熱的影響を受けやす
く許容温度幅の比較的狭い溶融プラスチックに対して、
その溶融プラスチックの温度を常に適正な温度域に保っ
て変質等を有効に防止しながら連続的に移送し続けるこ
とが可能になり、ひいては押出成形ラインにより製品化
される樹脂シート等に変質物や劣化物が混在する割合を
従来に比べて確実に低減化することが可能になる。With the gear pump having the above structure,
By appropriately switching the energization state to the heater 7 and the introduction state of the refrigerant into the refrigerant flow passage 8, the casing 1 particularly around the gears 4a and 4b through which the molten plastic passes.
The temperature inside can always be kept near the optimum value.
Further, even if there is a deviation from the optimum value, it is easy to control the optimum value in a short time in the present embodiment by the configuration that actively performs not only heating but also cooling of the casing 1. become. Therefore, for molten plastic that is easily affected by heat and has a relatively narrow allowable temperature range,
It is possible to keep the temperature of the molten plastic always in an appropriate temperature range and effectively prevent alteration, etc., and to continuously transfer it, which in turn transforms the resin sheet etc. produced by the extrusion molding line into a product such as a deteriorated substance or It is possible to reliably reduce the proportion of deteriorated substances mixed in as compared with the related art.
【００１８】また、このような効果は、本実施例で新た
に採用した他の構成によっても相乗的に高められるもの
となる。すなわち、本実施例においては、駆動軸５ａの
一端部のみならず、その他端部、さらには従動軸５ｂの
両端部をも、ケーシング１を貫通して外部に延出させ、
軸受６ａ、６ｂの溝６ａ1 、６ｂ1 を介して環状隙間に
到達した高温、高粘度の溶融プラスチックをそのカバー
貫通部に構成した軸封機構１０によって固化させながら
微量づつ外部放出するようにしている。そのため、前記
環状隙間の寸法や、冷媒流通路９、１０による冷却効果
を予め適正な値に設定しておきさえすれば、その環状隙
間を通して外部に漏洩する溶融プラスチックの量を最適
値にコントロールすることができる。このように、本実
施例は特に発熱量の多い軸受６ａ、６ｂを通過する際に
加熱されて変質した溶融プラスチックに対して従来と異
なり４箇所において放出部を与え、吸込み側に帰還させ
ることなく外部放出しているため、移送中の溶融プラス
チックに変質物や劣化物が混入する不具合を更に低減で
きるものとなる。すなわち、従来においては、駆動軸の
反延出端および従動軸の両端はカバーによって蓋封さ
れ、軸受の溝に沿って軸端部まで運ばれた溶融プラスチ
ックは、本体、フロントカバーおよびリヤカバーに設け
た還流孔を介して吸込口に帰還させていたため、特に発
熱の大きい軸受において変質、劣化した溶融プラスチッ
クが吸込み側に戻って移送中の溶融プラスチックに混入
するという不都合がつきまとったが、本実施例において
はそのような不具合を払拭できるものとなる。Further, such an effect can be synergistically enhanced by the other structure newly adopted in this embodiment. That is, in the present embodiment, not only one end of the drive shaft 5a but also the other end, and further both ends of the driven shaft 5b are passed through the casing 1 and extended to the outside,
The molten plastic having a high temperature and a high viscosity, which has reached the annular gap through the grooves 6a 1 and 6b 1 of the bearings 6a and 6b, is solidified by the shaft sealing mechanism 10 formed in the cover penetrating portion and is discharged to the outside in small amounts. There is. Therefore, if the size of the annular gap and the cooling effect of the refrigerant flow passages 9 and 10 are set to appropriate values in advance, the amount of molten plastic leaked to the outside through the annular gap is controlled to an optimum value. be able to. As described above, in this embodiment, unlike the conventional art, the molten plastic which is heated and deteriorated when passing through the bearings 6a and 6b, which generate a large amount of heat, is provided with discharge portions at four positions and is not returned to the suction side. Since it is released to the outside, it is possible to further reduce the problem that the deteriorated material and the deteriorated material are mixed in the molten plastic being transferred. That is, conventionally, the anti-extension end of the drive shaft and both ends of the driven shaft are covered with covers, and the molten plastic carried to the shaft end along the groove of the bearing is provided on the main body, front cover and rear cover. Since it was returned to the suction port through the recirculation hole, there was a disadvantage that the deteriorated and deteriorated molten plastic returned to the suction side and mixed with the molten plastic being transferred, especially in the bearing with large heat generation. In the above, such a defect can be eliminated.
【００１９】なお、各部の具体的な構成は、上述した実
施例のみに限定されるものではない。例えば、上記実施
例ではヒータにカートリッジタイプのものを用いたが、
鋳込ヒータやプレートヒータ等であってもよい。図６は
鋳込ヒータ１０７を用いる場合を示しており、ケーシン
グと鋳込みヒータとが本発明のポンプ本体に相当し、冷
媒流通路１０８はその鋳込ヒータ１０７内にパイプを引
き回すことにより簡単に構成することができる。１０７
ａはヒータ端子台である。The specific structure of each part is not limited to the above-mentioned embodiment. For example, although a cartridge type heater is used in the above embodiment,
It may be a casting heater or a plate heater. FIG. 6 shows a case where the cast-in heater 107 is used. The casing and the cast-in heater correspond to the pump body of the present invention, and the refrigerant flow passage 108 is simply constructed by drawing a pipe inside the cast-in heater 107. can do. 107
a is a heater terminal block.
【００２０】［付記１］本発明は上述したように、一方
の歯車ポンプを軸着する駆動軸および従動軸をそれぞれ
カバーを貫通して外部に延出するとともに、そのカバー
貫通部においてカバーと軸の間に形成される環状隙間を
軸封機構によって冷却し、この環状隙間を通して外方へ
漏洩しようとする溶融プラスチックを部分的に固化させ
る構成を併用することが有効であり、取り扱う流体に変
質物や劣化物が発生、混入する不具合を著しく低減する
ことが可能になる。[Supplementary Note 1] As described above, according to the present invention, the drive shaft and the driven shaft for pivotally mounting the one gear pump extend through the cover to the outside, and the cover and the shaft are provided at the cover penetrating portion. It is effective to use a structure in which the annular gap formed between the two is cooled by a shaft sealing mechanism and the molten plastic that is about to leak outward through this annular gap is partially solidified. It is possible to remarkably reduce the troubles caused by the generation and mixing of deterioration products.
【００２１】その他の構成も、本発明の趣旨を逸脱しな
い範囲で種々変形が可能である。Other configurations can be variously modified without departing from the spirit of the present invention.
【００２２】[0022]
【発明の効果】本発明の歯車ポンプは、以上説明したよ
うに、ポンプ本体内に導入される流体を、ポンプ本体に
内設したヒータおよび冷媒流通路を流れる冷媒の作動状
態を切り換えることによって常に略一定温度にコントロ
ールできるものである。そのため、熱的影響を受け易い
流体が温度変化により変質、劣化する不具合を効果的に
防止することができ、最終製品の品質を確実に向上させ
ることが可能になる。As described above, the gear pump according to the present invention constantly controls the fluid introduced into the pump main body by switching the operating states of the heater provided in the pump main body and the refrigerant flowing through the refrigerant flow passage. It can be controlled at a substantially constant temperature. Therefore, it is possible to effectively prevent the problem that the fluid that is easily affected by heat is deteriorated or deteriorated due to the temperature change, and it is possible to reliably improve the quality of the final product.
【図１】本発明の一実施例を示す全体縦断面図。FIG. 1 is an overall vertical sectional view showing an embodiment of the present invention.
【図２】図１におけるII-II 線断面図。FIG. 2 is a sectional view taken along line II-II in FIG.
【図３】同実施例の要部を模式的に示す図。FIG. 3 is a diagram schematically showing a main part of the embodiment.
【図４】同実施例の要部を模式的に示す図。FIG. 4 is a diagram schematically showing a main part of the embodiment.
【図５】同実施例の要部を斜視的に示す図。FIG. 5 is a perspective view showing a main part of the embodiment.
【図６】本発明の他の実施例を斜視的に示す図。FIG. 6 is a perspective view showing another embodiment of the present invention.
ＩＮ…吸込口 ＯＵＴ…吐出口 １…ポンプ本体（ケーシング） ４ａ、４ｂ…歯車 ７…ヒータ ８…冷媒流通路 IN ... Suction port OUT ... Discharge port 1 ... Pump body (casing) 4a, 4b ... Gear wheel 7 ... Heater 8 ... Refrigerant flow passage
Claims (1)
を、ポンプ本体に内設した一対の歯車により吐出口に向
かって移送する歯車ポンプにおいて、 前記ポンプ本体に、ヒータと、冷媒流通路とを設け、前
記ヒータおよび前記冷媒流通路に導入される冷媒の作動
状態を併用または切り換えることによりポンプ本体内を
略一定温度に保持することを特徴とする歯車ポンプ。1. A gear pump in which a fluid introduced from a suction port into a pump main body is transferred to a discharge port by a pair of gears provided in the pump main body, wherein the pump main body includes a heater and a refrigerant flow passage. Is provided, and the operating state of the refrigerant introduced into the heater and the refrigerant flow passage is used together or switched to maintain the inside of the pump body at a substantially constant temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13608194A JP3531212B2 (en) | 1994-06-17 | 1994-06-17 | Gear pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13608194A JP3531212B2 (en) | 1994-06-17 | 1994-06-17 | Gear pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH084662A true JPH084662A (en) | 1996-01-09 |
| JP3531212B2 JP3531212B2 (en) | 2004-05-24 |
Family
ID=15166806
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13608194A Expired - Fee Related JP3531212B2 (en) | 1994-06-17 | 1994-06-17 | Gear pump |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3531212B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0822336A2 (en) * | 1997-11-07 | 1998-02-04 | Maag Pump Systems Textron AG | Method for stabilizing the temperature of gear pumps |
| DE102006033028A1 (en) * | 2006-07-17 | 2008-01-24 | Vmi - Az Extrusion Gmbh | Extruder-gear pump combination, especially for forming tire tread strips, includes cooling channel switchable between higher and lower temperature supplies of coolant |
| CN108150410A (en) * | 2017-12-27 | 2018-06-12 | 郑州沃华机械有限公司 | A kind of smelt gear pump dedicated for rubber production device |
| CN115111156A (en) * | 2022-07-05 | 2022-09-27 | 郑州海科熔体泵有限公司 | Multistage temperature control dual-drive conveying rubber gear pump |
| RU2822672C1 (en) * | 2023-09-04 | 2024-07-11 | Федеральное Государственное Автономное Образовательное Учреждение Высшего Образования "Самарский Национальный Исследовательский Университет Имени Академика С.П. Королева" (Самарский Университет) | Gear pump |
-
1994
- 1994-06-17 JP JP13608194A patent/JP3531212B2/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0822336A2 (en) * | 1997-11-07 | 1998-02-04 | Maag Pump Systems Textron AG | Method for stabilizing the temperature of gear pumps |
| EP0822336A3 (en) * | 1997-11-07 | 1998-05-20 | Maag Pump Systems Textron AG | Method for stabilizing the temperature of gear pumps |
| US6280164B1 (en) | 1997-11-07 | 2001-08-28 | Maag Pump Systems Textron Ag | Method and apparatus for temperature stabilization in gear pumps |
| DE102006033028A1 (en) * | 2006-07-17 | 2008-01-24 | Vmi - Az Extrusion Gmbh | Extruder-gear pump combination, especially for forming tire tread strips, includes cooling channel switchable between higher and lower temperature supplies of coolant |
| CN108150410A (en) * | 2017-12-27 | 2018-06-12 | 郑州沃华机械有限公司 | A kind of smelt gear pump dedicated for rubber production device |
| CN115111156A (en) * | 2022-07-05 | 2022-09-27 | 郑州海科熔体泵有限公司 | Multistage temperature control dual-drive conveying rubber gear pump |
| RU2822672C1 (en) * | 2023-09-04 | 2024-07-11 | Федеральное Государственное Автономное Образовательное Учреждение Высшего Образования "Самарский Национальный Исследовательский Университет Имени Академика С.П. Королева" (Самарский Университет) | Gear pump |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3531212B2 (en) | 2004-05-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108779865A (en) | Flow control valve and cooling system | |
| US4070957A (en) | Ice cream machine | |
| US20060088622A1 (en) | Device and mold for rotational molding of plastic materials | |
| JPH084662A (en) | Gear pump | |
| KR101344950B1 (en) | Autoclave including motor direct-coupled air cooling type magnetic-drive | |
| KR940004214A (en) | Magnetic drive system and cooling system of gear pump | |
| JP2000205423A (en) | Molten substance valve | |
| EP1352725B1 (en) | Closed kneader | |
| KR101730080B1 (en) | Powder stuck-prevention valve | |
| KR920001791A (en) | Gas laser device | |
| US20220088830A1 (en) | Device for producing a multi-component mixture and method for operating said type of device | |
| JP3894991B2 (en) | Gear pump for molten resin and its operation method | |
| GB2032522A (en) | Vacuum unit for treating concrete | |
| JP3489175B2 (en) | Waste plastic processing equipment | |
| WO2020031223A1 (en) | Rapid cooling shaved ice manufacturing device | |
| CN206635275U (en) | A kind of rotary gum rosin decolouring heater | |
| JPH11247787A (en) | Blower | |
| JPH0817932B2 (en) | Screw type heating and cooling device | |
| KR200222441Y1 (en) | The Styrofoam of solution dealing apparatus | |
| KR102586030B1 (en) | Bio printer to which biomaterial freeze-hardening method is applied and freeze-hardening methiod thereof | |
| JP2003314282A (en) | Coolant pouring method, and flow-rate control valve used therein | |
| JP3850940B2 (en) | Engine thermo-housing structure | |
| JPH0538831Y2 (en) | ||
| JPH0421034Y2 (en) | ||
| JPH0313613Y2 (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20040210 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20040223 |
|
| R150 | Certificate of patent (=grant) or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313113 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080312 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090312 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100312 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100312 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110312 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110312 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120312 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120312 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130312 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20140312 Year of fee payment: 10 |
|
| LAPS | Cancellation because of no payment of annual fees |