JPH08284885A - Centrifugal pump - Google Patents

Abstract

PURPOSE: To reduce damage of equipment and piping, noise and vibrations due to pressure fluctuations, and to regularize a constant discharge quantity by installing one unit or plural ones consisting of plural blades fractionized in width and a partition wall to be installed in space between two blade, in a part held between a main plate and a side plate. CONSTITUTION: A unit is installed after getting plural blades fractionized in width shifted as far as each width of the blade 3 so as to make each blade 3 not to be overlapped in parallel with a shaft 5, and also shifted as far as an angle made up of dividing 360 degrees by the number of blades 3 on the basis of the center of this shaft 5. The width of the blade 3 is made to be inversely proportional to the number of sheets, so the more in sheet numbers, the smaller in pressure fluctuations. A partition wall 4 being in parallel with a main plate and a side plate 2 and in the same radius is installed in space between two side plates of the blade 3. With this constitution, since a pressure differential between those to be produced at a tip of the blade 3 and produced in a gap among the blades 3 is reduced, a variation in the extent of discharge pressure is also decreased, so that damage to equipment and piping, noises and vibrations are all reducible, and thus a discharge quantity can be kept constant.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は、液体に圧力、及び速度
エネルギーを与え搬送の用に供する、遠心ポンプに関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a centrifugal pump for imparting pressure and velocity energy to a liquid for transportation.

【０００２】[0002]

【従来の技術】従来の遠心ポンプはケーシングの中に、
図４のような主板１と側板２、及びそれらに挟まれた羽
根３３とから構成される遠心羽根車を設け、遠心羽根車
を回転させることによって、液体に圧力、及び速度エネ
ルギーを与えるもので、吸い込み口６より吸い込んだ液
体を、軸５に直角方向に吐出する。2. Description of the Related Art A conventional centrifugal pump has a casing,
A centrifugal impeller composed of a main plate 1 and side plates 2 and blades 33 sandwiched between them as shown in FIG. 4 is provided, and by rotating the centrifugal impeller, pressure and velocity energy are applied to the liquid. The liquid sucked from the suction port 6 is discharged in the direction perpendicular to the shaft 5.

【０００３】[0003]

【発明が解決しようとする課題】しかしながら従来の遠
心ポンプの圧力を測定してみると、運転中は常時圧力が
変動しており、吐出圧力が最も高くなるのは、羽根の先
端部分で、羽根と羽根との間の部分では、圧力は低下す
る。遠心ポンプの運転中に生じる急激な圧力変動は、配
管に取り付けた圧力計の歯車が磨耗するように機器や配
管を痛め、さらに騒音や振動の原因となり、吐出量も常
時変動し一定しない。本発明は上記の欠点を取り除くこ
とを目的としている。However, when the pressure of the conventional centrifugal pump is measured, the pressure constantly fluctuates during operation, and the discharge pressure becomes highest at the tip portion of the blade. The pressure drops in the area between the blade and the blade. Sudden pressure fluctuations that occur during operation of the centrifugal pump damage the equipment and piping such that the gears of the pressure gauge attached to the piping are worn, cause noise and vibration, and the discharge rate also fluctuates constantly and is not constant. The present invention aims to eliminate the above-mentioned drawbacks.

【０００４】[0004]

【課題を解決するための手段】上記の目的を達成するた
めに、主板１と側板２に挟まれた部分に、幅を細分化し
た複数の羽根３と、羽根３と羽根３との間に設けられる
隔壁４から構成されるユニットを１又は複数収まるよう
に設ける。ユニットの数は適宜に選択することができ、
軸５の中心を基準として等角度に設け、構成内容はすべ
て同一とする。In order to achieve the above object, a plurality of blades 3 each having a subdivided width in a portion sandwiched between a main plate 1 and a side plate 2, and between the blades 3 and 3. One or a plurality of units including the partition wall 4 provided are provided so as to be accommodated therein. The number of units can be selected appropriately,
The shaft 5 is provided at an equal angle with respect to the center of the shaft 5, and the configuration contents are the same.

【０００５】ユニットは、幅を細分化した複数の羽根３
を、軸５に平行にそれぞれの羽根３が重ならないように
羽根３の幅だけずらし、かつ軸５の中心を基準に３６０
度を羽根３の枚数で割った角度だけずらして設ける。羽
根３の幅と枚数は反比例するようにし、枚数を多くする
ほど圧力変動は少なくなる。最も主板１に近い羽根３の
側面を主板１に密着させ、最も側板２に近い羽根３の側
面を側板２に密着させ、羽根３の側面と羽根３の側面と
の間に、主板１と側板２に平行で、かつ同一半径の隔壁
４を設ける。The unit is composed of a plurality of blades 3 whose width is subdivided.
Are shifted parallel to the axis 5 by the width of the blades 3 so that the blades 3 do not overlap each other, and 360 degrees with the center of the axis 5 as a reference.
The angle is divided by the angle obtained by dividing the degree by the number of blades 3. The width of the blades 3 is inversely proportional to the number of blades, and the larger the number of blades, the smaller the pressure fluctuation. The side surface of the blade 3 closest to the main plate 1 is closely attached to the main plate 1, the side surface of the blade 3 closest to the side plate 2 is closely attached to the side plate 2, and the main plate 1 and the side plate are provided between the side surface of the blade 3 and the side surface of the blade 3. A partition wall 4 parallel to 2 and having the same radius is provided.

【０００６】主板１に密着して設けるユニットの位置を
始点とすると、始点の位置を側板２まで軸５に平行移動
した位置に、３６０度を羽根３の枚数で割った角度を、
当該ユニットで使用する羽根の枚数から１を引いた数を
かけて求めた角度を足した位置が、当該ユニットの終点
の位置となり、３６０度をユニットの数で割った角度を
足した位置が次のユニットの始点の位置になる。Assuming that the position of the unit closely attached to the main plate 1 is the starting point, an angle obtained by dividing 360 degrees by the number of blades 3 is set to the position where the starting point is translated to the side plate 2 in parallel with the axis 5.
The position obtained by adding the angle obtained by subtracting 1 from the number of blades used in the unit is the position of the end point of the unit, and the position obtained by adding the angle obtained by dividing 360 degrees by the number of units is next. It becomes the position of the starting point of the unit.

【０００７】主板１と側板２に挟まれた部分に、ユニッ
トの羽根３を極限まで細分化して、ユニットを平滑化し
たプレートを１又は複数収まるように設ける。プレート
の外縁部は常に主板１と側板２に挟まれた円周部と同位
置にあるので、吐出圧力は常に一定になる。In the portion sandwiched between the main plate 1 and the side plate 2, the blades 3 of the unit are subdivided to the utmost limit so that one or a plurality of plates having the unit smoothed can be accommodated. Since the outer edge portion of the plate is always located at the same position as the circumferential portion sandwiched between the main plate 1 and the side plate 2, the discharge pressure is always constant.

【０００８】プレートの数は１又は複数設けることがで
きプレートの数が１の場合、主板１に密着して設けるプ
レートの位置を始点とすると、始点の位置を軸５に側板
２まで平行移動した位置がプレートの終点の位置とな
る。複数のプレートを設ける場合、最初のプレートの始
点の位置に、３６０度をプレートの数で割った角度を足
した位置が、次に設けるプレートの始点の位置となる。
始点の位置を主板側に設けると、次に設けるプレートの
始点の位置を軸５に側板２まで平行移動した位置が最初
のプレートの終点の位置となる。The number of plates can be one or more. If the number of plates is one, and the position of the plate provided in close contact with the main plate 1 is the starting point, the position of the starting point is translated to the side plate 2 on the axis 5. The position is the end position of the plate. When a plurality of plates are provided, a position obtained by adding an angle obtained by dividing 360 degrees by the number of plates to the position of the starting point of the first plate is the position of the starting point of the plate to be provided next.
When the position of the starting point is provided on the main plate side, the position at which the starting point of the plate to be provided next is translated to the side plate 2 about the axis 5 becomes the ending point of the first plate.

【０００９】ユニット、及びプレートは主板１から側板
２に向かって設けても、側板２から主板１に向かって設
けてもよい。The unit and the plate may be provided from the main plate 1 toward the side plate 2 or may be provided from the side plate 2 toward the main plate 1.

【００１０】[0010]

【作用】上記の如く構成すると、羽根の先端で発生する
圧力と、羽根と羽根との間で発生する圧力の差が減少す
るため、吐出圧力の変動が減少し、それに伴って吐出量
の変動も少なくなる。With the above-mentioned structure, the difference between the pressure generated at the tip of the blade and the pressure generated between the blades is reduced, so that the fluctuation of the discharge pressure is decreased, and the fluctuation of the discharge amount is accompanied by the fluctuation. Also less.

【００１１】[0011]

【実施例】図１に基づいて実施例１を説明する。主板１
と側板２の間に挟まれて設けられる羽根３の幅は、主板
から側板までの距離の２分の１で、羽根３の枚数は１２
枚とし軸５の中心を基準に３０度ずつ回転させて設けて
いる。 羽根３を主板１に密着して設け、次の羽根３を
軸５の中心を基準に３０度回転した位置に、先に設けた
羽根３に重ならないように側板２に密着して設けてい
る。主板１に密着して設けた羽根３と側板２に密着して
設けた羽根３との間には、主板１と側板２に平行で、か
つ同一半径の隔壁４を設けている。吸い込み口６より入
った液体は回転している羽根３によって圧力と速度エネ
ルギーを与えられ円周部からでてゆく。Embodiment 1 Embodiment 1 will be described with reference to FIG. Main board 1
The width of the blade 3 sandwiched between the side plate 2 and the side plate 2 is one half of the distance from the main plate to the side plate, and the number of blades 3 is 12
It is provided by rotating the shaft 5 by 30 degrees with respect to the center of the shaft 5. The blade 3 is provided in close contact with the main plate 1, and the next blade 3 is provided in a position rotated by 30 degrees about the center of the shaft 5 so as to be in close contact with the side plate 2 so as not to overlap with the blade 3 previously provided. . Between the blade 3 provided in close contact with the main plate 1 and the blade 3 provided in close contact with the side plate 2, a partition wall 4 parallel to the main plate 1 and the side plate 2 and having the same radius is provided. The liquid that has entered through the suction port 6 is given pressure and velocity energy by the rotating blade 3 and flows out from the circumferential portion.

【００１２】図２に基づいて実施例２を説明する。主板
１と側板２の間に挟まれた部分に、プレート７の側面を
主板１に密着させ、反対側の側面を側板２に密着させて
設け、軸５の中心を基準として等角度に６枚のプレート
７を設けている。吸い込み口６より入った液体は、回転
しているプレート７によって圧力と速度エネルギーを与
えられ円周部からでてゆく。A second embodiment will be described with reference to FIG. In a portion sandwiched between the main plate 1 and the side plate 2, the side surface of the plate 7 is closely attached to the main plate 1 and the opposite side surface is closely attached to the side plate 2, and the six sides are equiangular with respect to the center of the shaft 5. The plate 7 is provided. The liquid that has entered through the suction port 6 is given pressure and velocity energy by the rotating plate 7 and flows out from the circumferential portion.

【００１３】図３に基づいて実施例３を説明する。主板
１と側板２の間に挟まれた部分に、プレート１７の側面
を主板１に密着させ、反対側の側面を側板２に密着させ
て設け、軸５の中心を基準として等角度に２枚のプレー
ト１７を設けている。吸い込み口６より入った液体は、
回転しているプレート１７によって圧力と速度エネルギ
ーを与えられ円周部からでてゆく。A third embodiment will be described with reference to FIG. In a portion sandwiched between the main plate 1 and the side plate 2, the side surface of the plate 17 is closely attached to the main plate 1 and the opposite side surface is closely attached to the side plate 2, and two pieces are equiangular with respect to the center of the shaft 5. The plate 17 is provided. The liquid that entered through the suction port 6
Pressure and velocity energy are applied by the rotating plate 17 to move out of the circumference.

【００１４】[0014]

【発明の効果】上述の如く本発明によれば、遠心ポンプ
の運転によって、吐出される液体の圧力変動が減少する
ため、圧力変動による機器や配管の傷み、騒音、振動が
低減され、吐出量の変動も減少する。As described above, according to the present invention, the fluctuation of the pressure of the discharged liquid is reduced by the operation of the centrifugal pump, so that the damage of the equipment and the piping due to the pressure fluctuation, the noise and the vibration are reduced, and the discharge amount is reduced. The fluctuations of are also reduced.

【図面の簡単な説明】[Brief description of drawings]

【図１】従来の羽根の幅を２分の１にして、羽根の枚数
を２倍にした遠心ポンプの斜視図。FIG. 1 is a perspective view of a centrifugal pump in which the width of a conventional blade is halved and the number of blades is doubled.

【図２】プレートを、６組設けた遠心ポンプの斜視図。FIG. 2 is a perspective view of a centrifugal pump provided with 6 sets of plates.

【図３】プレートを、２組設けた遠心ポンプの斜視図。FIG. 3 is a perspective view of a centrifugal pump provided with two sets of plates.

【図４】従来の羽根が６枚の、遠心ポンプの斜視図。FIG. 4 is a perspective view of a conventional centrifugal pump having six blades.

【符号の説明】[Explanation of symbols]

１ 主板 ２ 側板 ３、３３ 羽根 ４ 隔壁 ５ 軸 ６ 吸い込み口 ７、１７ プレート 1 Main plate 2 Side plates 3, 33 Blades 4 Partition wall 5 Shaft 6 Suction port 7, 17 Plate

Claims (3)

【特許請求の範囲】[Claims] 【請求項１】 主板（１）と側板（２）に挟まれた部分
に、幅を細分化した複数の羽根（３）を、軸（５）に平
行にそれぞれの羽根（３）が重ならないように羽根
（３）の幅だけずらし、かつ軸（５）の中心を基準に３
６０度を羽根（３）の枚数で割った角度だけずらし、羽
根（３）の側面と羽根（３）の側面との間に、主板
（１）と側板（２）に平行で、かつ同一半径の隔壁
（４）を設け、これらをユニットとして、１又は複数収
まるように設けた遠心ポンプ。1. A plurality of blades (3) whose widths are subdivided in a portion sandwiched between a main plate (1) and a side plate (2), and the respective blades (3) do not overlap in parallel to an axis (5). Shift by the width of the blade (3), and 3 with respect to the center of the shaft (5)
The angle is 60 degrees divided by the number of blades (3), and is parallel to the main plate (1) and the side plate (2) and has the same radius between the side surface of the blade (3) and the side surface of the blade (3). Centrifugal pump provided with the partition walls (4) of (1) to accommodate one or more of these as a unit. 【請求項２】羽根（３）の幅と枚数が反比例するように
設けた請求項１記載の遠心ポンプ。2. The centrifugal pump according to claim 1, wherein the number of blades and the number of blades are inversely proportional. 【請求項３】主板（１）と側板（２）に挟まれた部分
に、ユニットの羽根（３）を極限まで細分化して、ユニ
ットを平滑化したプレートを１又は複数収まるように設
けた遠心ポンプ。3. A centrifuge in which a blade (3) of a unit is subdivided to a limit in a portion sandwiched between a main plate (1) and a side plate (2) so that one or a plurality of plates with the unit smoothed can be accommodated. pump.