JPH0267469A - Nonpulsating quantitative pump - Google Patents
Nonpulsating quantitative pumpInfo
- Publication number
- JPH0267469A JPH0267469A JP21846188A JP21846188A JPH0267469A JP H0267469 A JPH0267469 A JP H0267469A JP 21846188 A JP21846188 A JP 21846188A JP 21846188 A JP21846188 A JP 21846188A JP H0267469 A JPH0267469 A JP H0267469A
- Authority
- JP
- Japan
- Prior art keywords
- pump
- plunger
- cam
- discharge
- plungers
- 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.)
- Pending
Links
- 239000012530 fluid Substances 0.000 claims abstract description 13
- 238000005086 pumping Methods 0.000 claims abstract description 4
- 230000010349 pulsation Effects 0.000 claims description 8
- 239000002131 composite material Substances 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Landscapes
- Reciprocating Pumps (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、往復動プランジャポンプを使用した無脈動
定量ポンプに係り、特に２基の定量ポンプをその流体の
流れが直列となるように配置して構成の単純化を図った
無脈動定量ポンプの改良に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a non-pulsating metering pump using a reciprocating plunger pump, and in particular to a method in which two metering pumps are arranged so that the fluid flows in series. This invention relates to an improvement of a pulsationless metering pump that has a simplified configuration.
一般に、シングルプランジャ式往復動ポンプは、吸込行
程時に吐出量が零となるため、吐出流体は大きな脈動を
発生することから、２基の同径のプランジャポンプを使
用して各プランジャの往復動の位相を１／２サイクルず
らして各プランジャの合計移動容積が常に一定となるよ
うに制御する無脈動定量ポンプが実施されている。この
種の無脈動定量ポンプは、各プランジャの合計移動容積
が一定になるよう作動させる特殊な曲線を有する１個ま
たは２個のカムを使用し、２本のプランジャのポンプ動
作による合成吐出量を理論上無脈動にすることができる
。In general, single-plunger reciprocating pumps have a discharge volume of zero during the suction stroke, which causes large pulsations in the discharged fluid. Therefore, two plunger pumps with the same diameter are used to control the reciprocating motion of each plunger. A non-pulsating metering pump has been implemented in which the phase is shifted by 1/2 cycle so that the total displacement of each plunger is always constant. This type of pulsationless metering pump uses one or two cams with special curves that actuate each plunger so that the total displacement volume is constant, and the combined displacement of the two plungers is adjusted. Theoretically, it can be made pulsating-free.
しかしながら、実際にはカムの加工上の問題点から、前
述した合成吐出量の脈動を完全に回避することが困難で
あり、特に２本のプランジャの合成部分において、流量
が局部的に減少すると共に吐出圧力も低下して脈動が発
生する。However, in reality, due to problems in cam processing, it is difficult to completely avoid the pulsation in the composite discharge amount described above, and especially in the composite portion of the two plungers, the flow rate decreases locally and The discharge pressure also decreases and pulsation occurs.
このような観点から、出願人は先に、２本のプランジャ
を駆動するカムに駆動モータを連結すると共に駆動モー
タに駆動制御回路を接続し、さらに合成吐出流体の圧力
を検出して圧力変動位置を検出する回路と、カムの回転
位置を検出する回路とを設けて、これらの回路で得られ
る出力信号を前記駆動制御回路に供給して駆動モータの
速度制御を行うよう構成した無脈動定量ポンプを提案し
特許出願（特開昭５７−７０９７６号）を行った。From this perspective, the applicant first connected a drive motor to the cam that drives the two plungers, connected a drive control circuit to the drive motor, and further detected the pressure of the composite discharge fluid to determine the position of pressure fluctuation. A non-pulsating metering pump comprising a circuit for detecting the rotational position of the cam and a circuit for detecting the rotational position of the cam, and configured to supply output signals obtained from these circuits to the drive control circuit to control the speed of the drive motor. He proposed and filed a patent application (Japanese Patent Application Laid-Open No. 70976/1983).
このように、従来から無脈動ポンプの脈動の発生を実質
的に極めて少く抑制するため、種々提案がなされている
。As described above, various proposals have been made in order to substantially suppress the occurrence of pulsation in pulsationless pumps to a very low level.
〔発明が解決しようとする課題〕
一般に、この種の無脈動定量ポンプにおいては、第４図
に示す通り、２基の定量ポンプ７０．７２を並列に配置
し、これらの定量ポンプは吸込口同志７４．７４および
吐出口同志７６．７６を配管接続して流体の流れがそれ
ぞれ並列になるよう構成されている。従って、このよう
な定量ポンプの配列では、それぞれのポンプに設けられ
た配管は接続集合されるため、これら配管により占めら
れる空間の領域は必要以上に拡大され、ポンプ設置場所
の制約を受ζフると共に配管構成が複雑なため配管作業
が困難となり結果的にトータルコストが高価になる難点
を有していた。[Problems to be Solved by the Invention] Generally, in this type of non-pulsating metering pump, two metering pumps 70 and 72 are arranged in parallel, as shown in FIG. 74, 74 and discharge ports 76, 76 are connected by piping so that fluid flows are parallel to each other. Therefore, in such an arrangement of metering pumps, the piping provided for each pump is connected and collected, so the area of space occupied by these piping is expanded more than necessary. In addition, the piping structure is complicated, making piping work difficult and resulting in high total costs.
そこで、本発明の目的は２基の定量ポンプをその流体の
流れが直列となるように上下に配置し、吸込、吐出配管
を単一化して全体としてコンパクトな構成とすることの
できる無脈動定量ポンプを提供するにある。Therefore, the purpose of the present invention is to provide a non-pulsating metering system that can have two metering pumps placed one above the other so that the fluid flows in series, and can have a single suction and discharge piping, resulting in a compact overall configuration. There is a pump to provide.
本発明に係る無脈動定量ポンプは、２本のプランジャを
カム駆動により各ポンプ室内を往復動させてそれぞれの
プランジャのポンプ動作により合成吐出量を得るよう構
成した無脈動定量ポンプにおいて、
前記各プランジャの往復動により吸込、吐出される流体
をその流れが直列となるよう各ポンプ室を接続配置し、
前記各プランジャの軸線に対しこれと直交する方向に回
転軸を回転自在に軸支し、この回転軸にそれぞれが相対
的に半径方向に変位する一対のカム部材を設けると共に
この回転軸の一部に回転駆動手段を結合することを特徴
とする。A pulsationless metering pump according to the present invention is a pulsationless metering pump configured to reciprocate two plungers in each pump chamber by cam drive and obtain a combined discharge amount by the pumping operation of each plunger, wherein each of the plungers Each pump chamber is connected and arranged so that the fluid that is sucked in and discharged by the reciprocating motion of the pump is in series.
A rotary shaft is rotatably supported in a direction perpendicular to the axis of each plunger, and a pair of cam members are provided on the rotary shaft, each of which is relatively displaceable in a radial direction, and a part of the rotary shaft is provided. It is characterized in that a rotational drive means is coupled to the.
この場合、相互に接続された前記ポンプ室は、その接続
部および吸込部に逆止弁を設ければ好適である。In this case, it is preferable that the mutually connected pump chambers are provided with check valves at their connecting parts and suction parts.
本発明に係る無脈動定量ポンプによれば、回転駆動手段
の駆動により回転軸を介して一対のカム部材が回転する
。このカム部材の回転により各プランジャは前記回転軸
に対し遠心方向と求心方向く二次元の変位）にそれぞれ
１８０４の位相差を以って変位する。この場合、ポンプ
室を前記プランジャの往復動により吸込、吐出される流
体をその流れが直列となるよう接続配置し、各プランジ
ャを往復動させる一対のカム曲線と逆止弁との組合せに
より、各プランジャの吐出波形の合成波形を実質的に一
定とすることができる。According to the pulsationless metering pump according to the present invention, the pair of cam members are rotated via the rotation shaft by driving the rotation drive means. Due to the rotation of the cam member, each plunger is displaced with a phase difference of 1804 in two-dimensional displacements in the centrifugal direction and the centripetal direction with respect to the rotation axis. In this case, the pump chambers are arranged so that the fluid sucked in and discharged by the reciprocating motion of the plunger is connected in series, and each plunger is reciprocated by a combination of a pair of cam curves and a check valve. The composite waveform of the discharge waveform of the plunger can be made substantially constant.
次に、本発明に係る無脈動定量ポンプの実施例につき添
付図面を参照しながら以下詳細に説明する。Next, embodiments of the pulsationless metering pump according to the present invention will be described in detail below with reference to the accompanying drawings.
第１図は、本発明に係る無脈動定量ポンプの一実施例を
示す要部断面図である。第１図において、１０はカムハ
ウジング１２とプランジャハウジング１４とからなるポ
ンプハウジングであり、カムハウジング１２には回転軸
１６が軸受１８，２０により垂直方向に回転自在に軸支
されている。また前記回転軸１６の一端（図中上方）に
はカムハウジング１２上部に取付けられた減速モータ２
・２の出力軸が接続されている。さらに、この回転軸１
６には第１のカム部材２４と第２のカム部材２６とから
なる一対のカム部材が上下に配設されている。またプラ
ンジャハウジング１４内には前記回転軸１６と直交する
２本のプランジャ２８．３０が上下に平行に摺動可能に
設けられ、これらのプランジャ２８゜３０の後端側面（
左側）にはそれぞれカムフォロア３２．３４が設けられ
、これらカムフォロア３２．３４はカム部材２４．２６
の側面に削成されたカム溝３６．３８に係合している。FIG. 1 is a sectional view of essential parts showing an embodiment of a pulsationless metering pump according to the present invention. In FIG. 1, reference numeral 10 denotes a pump housing consisting of a cam housing 12 and a plunger housing 14. A rotating shaft 16 is rotatably supported in the cam housing 12 by bearings 18 and 20 in a vertical direction. Further, at one end of the rotating shaft 16 (upper part in the figure), a deceleration motor 2 is attached to the upper part of the cam housing 12.
・Output shaft 2 is connected. Furthermore, this rotating shaft 1
At 6, a pair of cam members consisting of a first cam member 24 and a second cam member 26 are arranged one above the other. In addition, two plungers 28 and 30 which are orthogonal to the rotational shaft 16 are provided in the plunger housing 14 so as to be able to slide vertically and parallel to each other.
cam followers 32.34 are provided on the left side), and these cam followers 32.34 are connected to the cam members 24.26.
It engages with cam grooves 36 and 38 cut into the side surfaces of the cam grooves 36 and 38.
一方、前記プランジャハウジング１４の右側面には内部
に第１のポンプ室３９が形成された第１のポンプケーシ
ングと、第２のポンプ室４０が形成された第２のポンプ
ケーシング４４が上下に配設されている。また、前記各
ポンプ室３９．４０内には前記プランジャ２８．３０の
先端が進退可能に挿入し、その挿入部分はそれぞれシー
ル部４６．４８によりシールされている。On the other hand, on the right side of the plunger housing 14, a first pump casing in which a first pump chamber 39 is formed and a second pump casing 44 in which a second pump chamber 40 is formed are arranged vertically. It is set up. Further, the tip of the plunger 28.30 is inserted into each of the pump chambers 39.40 so as to be movable forward and backward, and the inserted portion is sealed by a seal portion 46.48.
さらに、プランジャハウジング１４の右側面の下側に取
付けられた第２のポンプケーシング４４には吸込口５０
が設けられ、この吸込口５０と第２のポンプ室間には逆
止弁５２が組込まれている。また、前記第２のポンプゲ
ージング４４の吐出口とその上方に設けられた第１のポ
ンプケーシング４２の吸込口間は逆止弁５４を介して連
通接続され、さらに第１のポンプゲージング４２の上方
には吐出口５６が設けられている。尚、この場合、前記
吐出口５６には逆止弁は設ける必要はないが、殊に逆流
防止または整流のなめにこれを設けることは妨げない。Further, a suction port 50 is provided in the second pump casing 44 attached to the lower right side of the plunger housing 14.
A check valve 52 is installed between the suction port 50 and the second pump chamber. Further, the discharge port of the second pump gauging 44 and the suction port of the first pump casing 42 provided above the second pump gauging 42 are connected to each other via a check valve 54, and further above the first pump gauging 42. A discharge port 56 is provided therein. In this case, the discharge port 56 does not need to be provided with a check valve, but it is not prohibited to provide it especially for the purpose of preventing backflow or regulating the flow.
このようにして、第２のポンプ室４０内に挿入している
プランジャ３０の往復動によりポンプ作用を行う定量ポ
ンプがそれぞれ逆止弁を介してその流れが直列となるよ
う配設される。In this way, the metering pumps, each of which performs a pumping action by the reciprocating motion of the plunger 30 inserted into the second pump chamber 40, are arranged so that their flows are in series via the check valves.
つぎに、上下に配設された第１の定量ポンプ５８と第２
の定量ポンプ６０によるポンプ作動について説明する。Next, the first metering pump 58 and the second metering pump 58 are arranged vertically.
The operation of the metering pump 60 will be explained.
下側に設けられた第２のポンプ室４０内に一端を挿入し
ているプランジャ３０は第２のカム部材２６の回転動作
により変位した分、後退移動し、この移動により流体は
吸込口５０より逆止弁５２を通過して第２のポンプ室４
０内に流入する。The plunger 30, whose one end is inserted into the second pump chamber 40 provided on the lower side, moves backward by the amount of displacement caused by the rotation of the second cam member 26, and this movement causes the fluid to flow from the suction port 50. Passing through the check valve 52 to the second pump chamber 4
Flows into 0.
さらに、第２のカム部材２６が回転軸１６と共に回転す
ると、この第２のカム部材２６のカム溝３８は半径方向
に変位し、プランジャ３０を前進（右行）させる、これ
により第２のポンプ室４０内で圧縮された液体は逆止弁
５４を通過して第１のポンプ室３９内に流入する。この
場合、同時に第１のポンプ室３９内に進退自在に挿入し
ている上側のプランジャ２８は、前記第２のカム部材２
６のカム溝３８と１８０°の位相差をもって形成された
第１のカム部材２４のカム溝３６により、下側のプラン
ジャ３０とは相対的な往復運動、すなわち後退動作が開
始される。Furthermore, when the second cam member 26 rotates together with the rotating shaft 16, the cam groove 38 of the second cam member 26 is displaced in the radial direction, causing the plunger 30 to move forward (to the right), thereby causing the second pump to move forward (to the right). The liquid compressed within the chamber 40 passes through the check valve 54 and flows into the first pump chamber 39 . In this case, the upper plunger 28, which is inserted into the first pump chamber 39 so as to be freely retractable, is connected to the second cam member 2.
The cam groove 36 of the first cam member 24, which is formed with a phase difference of 180 degrees from the cam groove 38 of the lower plunger 30, starts a reciprocating motion relative to the lower plunger 30, that is, a backward movement.
従って、前記第２のポンプ室４０内の液体が第１のポン
プ室３９内に流入する。さらに第１のカム部材２４が回
転するとプランジャ２８は再び前進動作に入り、第１の
ポンプ室３９内の液体を吐出口５６より吐出し、直列の
流体の流れが形成される。Therefore, the liquid in the second pump chamber 40 flows into the first pump chamber 39. When the first cam member 24 further rotates, the plunger 28 enters the forward motion again, and the liquid in the first pump chamber 39 is discharged from the discharge port 56, forming a serial fluid flow.
従来から、それぞれのプランジャの動作を相対的に行わ
せて吸込、吐出行程を同時に行うことで、それぞれの流
量波形で生ずる山、谷（パルス）をそれぞれ打消し合い
、合成吐出量を一定にすることにより、脈動を防止する
並列型の無脈動ポンプは知られている。しかしながら、
合成吐出量の脈動を完全に回避するにはカム形状が複雑
となり困難とされてきた。Traditionally, the suction and discharge strokes are performed simultaneously by moving each plunger relative to each other, thereby canceling out the peaks and valleys (pulses) that occur in each flow waveform, and making the combined discharge amount constant. Parallel type pulsation-free pumps that prevent pulsation are known. however,
It has been considered difficult to completely avoid pulsations in the combined discharge amount because the cam shape is complicated.
そこで、本発明は第１、第２の定量ボンブ５８．６０を
その流れが直列となるよう配置することにより前記問題
を一気に解決しな。Therefore, the present invention solves the above problem at once by arranging the first and second metering bombs 58, 60 so that their flows are in series.
すなわち、第２図（ａ）（ｂ）（ｃ）にそれぞれ示され
る流量波形を得るべく各プランジャ２８．３０の動作を
与える第１、第２のカム部材２４．２６の組合せで解決
することができる。That is, the problem can be solved by the combination of the first and second cam members 24.26 that provide the movement of each plunger 28.30 to obtain the flow waveforms shown in FIGS. 2(a), 2(b), and 2(c), respectively. can.
この場合、プランジャ２８．３０の往復移動による吸込
、吐出行程は、それぞれ第１、第２のカム部材２４．２
６の一回転（１サイクル）によって得られる。しかるに
、前記第１、第２の定量ポンプ５８．６０による吸込、
吐出の流量波形は第２図（ｂ）（ｃ）に示す台形状の波
形となり、この波形はそれぞれ第１、第２のカム部材２
４．２６に削成されたカム消３６，３８の形状により創
出される。In this case, the suction and discharge strokes due to the reciprocating movement of the plunger 28.30 are performed by the first and second cam members 24.2, respectively.
6 one revolution (one cycle). However, the suction by the first and second metering pumps 58,60;
The discharge flow rate waveform is a trapezoidal waveform shown in FIGS. 2(b) and 2(c), and these waveforms are respectively
It is created by the shape of the cam erasers 36 and 38 which are cut to 4.26.
従って、第１のカム部材２４と第２のカム部材２６を、
それらのカム消３６，３８により創出される吸込、吐出
波形の位相が互いに１８０°ずれるべく、同一回転軸１
６上に配設することにより、それぞれの波形は互いに打
消し合い、第２図（ａ）に示す合成波形となり、図中斜
線で示される脈動のない一定波形の吐出量を得ることが
できる。Therefore, the first cam member 24 and the second cam member 26 are
The same rotating shaft 1
6, the respective waveforms cancel each other out, resulting in a composite waveform shown in FIG. 2(a), and it is possible to obtain a discharge amount of a constant waveform without pulsation shown by diagonal lines in the figure.
すなわち、換言すれば、第２の定量ポンプ６０は第１の
定量ボン１５８より大なる吐出量を有し、第２の定量ポ
ンプ６０の吐出時にはその吐出量は一定吐出量を越える
吐出行程を有するが、この際第１の定量ポンプ５８は吸
込行程となるため、全体としては吐出量は変化しない。In other words, the second metering pump 60 has a larger discharge amount than the first metering pump 158, and when the second metering pump 60 discharges, the discharge amount has a discharge stroke that exceeds a constant discharge amount. However, since the first metering pump 58 is in the suction stroke at this time, the discharge amount does not change as a whole.
すなわち、これを第３図に示す流量波形説明図に基づい
て説明すると、第２の定量ポンプ６０の吐出、吸込波形
をｆ（θ）とした場合（θは回転軸１６の回転角とする
）、ｆ（θ）＝Ｏ（吐出、吸込め切替え時）となる点を
θ。、θ１ヒするとポンプの吐出量と吸となり、
この時平均吐出量ｑは１ストローク当りの吐となる。こ
こで、第１の定量ポンプ５８の吐出、吸込波形をｇ〈θ
）とすると、
となる、また、ｇ（θ）＝０となる点をθｔ。That is, to explain this based on the flow rate waveform explanatory diagram shown in FIG. 3, when the discharge and suction waveforms of the second metering pump 60 are f(θ) (θ is the rotation angle of the rotating shaft 16). , θ is the point where f(θ)=O (when switching between discharge and suction). , θ1 becomes the pump's discharge amount and suction, and at this time, the average discharge amount q becomes the discharge per stroke. Here, the discharge and suction waveforms of the first metering pump 58 are expressed as g〈θ
), then θt is the point where g(θ)=0.
θ、とすると吐出量と吸込量は同じであるか八
〔発明の効果〕
前述した実施例がら−明らかなように、本発明に係る無
脈動定量ポンプによれば、各プランジャの往復動により
吸込、吐出される流体をその流れが直列となるように各
ポンプを接４ 。If θ, then the discharge amount and the suction amount are the same.8 [Effects of the Invention] As is clear from the above-mentioned embodiments, according to the non-pulsating metering pump of the present invention, the suction amount is increased by the reciprocating motion of each plunger. , connect each pump so that the fluid to be discharged flows in series.
続装置することにより、従来の並列形の無脈動定量ポン
プに必要な吸込、吐出配管が不要となり、ポンプが空間
を占める領域が削減されて省スペース化が達成できる。By connecting the pump to the pump, the suction and discharge piping required for conventional parallel non-pulsating metering pumps is no longer necessary, and the space occupied by the pump is reduced, resulting in space savings.
さらに、各プランジャの軸線に対しこれと直交する方向
に回転軸を回転自在に軸支し、この回転軸にそれぞれが
相対的に半径方向に変位する一対のカム部材を設けると
共にこの回転軸の一部に回転駆動手段を結合するよう構
成することにより、無脈動定量吐出を有効に達成するこ
とができる。Further, a rotary shaft is rotatably supported in a direction orthogonal to the axis of each plunger, and a pair of cam members are provided on the rotary shaft, each of which is displaceable in a radial direction, and one of the rotary shafts is By configuring the rotary drive means to be coupled to the part, pulsation-free fixed-quantity dispensing can be effectively achieved.
以上、本発明の好適な実施例について説明したが、本発
明の精神を逸脱しない範囲内において種々の設計変更を
なし得ることは勿論である。Although the preferred embodiments of the present invention have been described above, it goes without saying that various design changes can be made without departing from the spirit of the present invention.
第１図は本発明に係る無脈動定量ポンプの要部断面図、
第２図は本発明に係る無脈動定量ポンプの吐出量波形図
を示し、第２図（ａ＞は合成波形図、第２図（ｂ）は第
１の定量ボンプの流量波形図、第２図（ｃ）は第２の定
量ポンプの流量波形図、第３図は流量波形説明図、第４
図は従来の無脈動定量ポンプの全体斜視図である。
６０・・・第２の定量ポンプ
７０、７２・・・定量ポンプ
７４・・・吸込口 ７６・・・吐出口１０・・・
ポンプハウジング
１２・・・カムハウジング
１４・・・プランジャハウジング
１６・・・回転軸 １８．２０・・・軸受２２・
・・減速モータ ２４・・・第１のカム部材２６・・
・第２のカム部材
２８．３０・・・プランジャ
３２．３４・・・カムフォロア
３６．３８カム消 ３９・・・第１のポンプ室４０
・・・第２のポンプ室
４２・・・第１のポンプゲージング
４４・・・第２のポンプケーシング
４６．４８・・・シール部 ５０・・・吸込口５２．５
４・・・逆止弁 ５６・・・吐出口５８・・・第１の
定量ポンプFIG. 1 is a sectional view of essential parts of a pulsationless metering pump according to the present invention,
FIG. 2 shows a discharge amount waveform diagram of the pulsationless metering pump according to the present invention, FIG. Figure (c) is a flow rate waveform diagram of the second metering pump, Figure 3 is a flow rate waveform explanatory diagram, and Figure 4 is a flow waveform diagram of the second metering pump.
The figure is an overall perspective view of a conventional pulsationless metering pump. 60... Second metering pump 70, 72... Metering pump 74... Suction port 76... Discharge port 10...
Pump housing 12...Cam housing 14...Plunger housing 16...Rotating shaft 18.20...Bearing 22...
...Deceleration motor 24...First cam member 26...
・Second cam member 28.30... Plunger 32.34... Cam follower 36.38 Cam eraser 39... First pump chamber 40
...Second pump chamber 42...First pump gauging 44...Second pump casing 46.48...Seal portion 50...Suction port 52.5
4...Check valve 56...Discharge port 58...First metering pump
Claims (2)
を往復動させてそれぞれのプランジャのポンプ動作によ
り合成吐出量を得るよう構成した無脈動定量ポンプにお
いて、 前記各プランジャの往復動により吸込、吐 出される流体をその流れが直列となるよう各ポンプ室を
接続配置し、前記各プランジャの軸線に対しこれと直交
する方向に回転軸を回転自在に軸支し、この回転軸にそ
れぞれが相対的に半径方向に変位する一対のカム部材を
設けると共にこの回転軸の一部に回転駆動手段を結合す
ることを特徴とする無脈動定量ポンプ。(1) In a non-pulsating metering pump configured to reciprocate two plungers in each pump chamber by cam drive and obtain a composite discharge amount by the pumping operation of each plunger, suction and discharge are performed by the reciprocating movement of each plunger. The pump chambers are connected and arranged so that the fluid flows in series, and a rotary shaft is rotatably supported in a direction perpendicular to the axis of each plunger, and each pump chamber is connected and arranged so that the fluid flows in series. A pulsationless metering pump characterized in that a pair of cam members displaceable in the radial direction are provided, and a rotation drive means is coupled to a part of the rotation shaft.
よび吸込部に逆止弁を設けてなる請求項１記載の無脈動
定量ポンプ。(2) The non-pulsation metering pump according to claim 1, wherein the mutually connected pump chambers are provided with check valves at their connecting portions and suction portions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21846188A JPH0267469A (en) | 1988-09-02 | 1988-09-02 | Nonpulsating quantitative pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21846188A JPH0267469A (en) | 1988-09-02 | 1988-09-02 | Nonpulsating quantitative pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0267469A true JPH0267469A (en) | 1990-03-07 |
Family
ID=16720267
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21846188A Pending JPH0267469A (en) | 1988-09-02 | 1988-09-02 | Nonpulsating quantitative pump |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0267469A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008524512A (en) * | 2004-12-22 | 2008-07-10 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | Piston pump with at least one piston element |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5974377A (en) * | 1982-10-20 | 1984-04-26 | Asahi Chem Ind Co Ltd | Pump device |
| JPS6321370A (en) * | 1986-07-14 | 1988-01-28 | Nikkiso Co Ltd | Pulsation-free constant flow rate pump |
-
1988
- 1988-09-02 JP JP21846188A patent/JPH0267469A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5974377A (en) * | 1982-10-20 | 1984-04-26 | Asahi Chem Ind Co Ltd | Pump device |
| JPS6321370A (en) * | 1986-07-14 | 1988-01-28 | Nikkiso Co Ltd | Pulsation-free constant flow rate pump |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008524512A (en) * | 2004-12-22 | 2008-07-10 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | Piston pump with at least one piston element |
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