JPH0914171A - Pump - Google Patents
PumpInfo
- Publication number
- JPH0914171A JPH0914171A JP7167395A JP16739595A JPH0914171A JP H0914171 A JPH0914171 A JP H0914171A JP 7167395 A JP7167395 A JP 7167395A JP 16739595 A JP16739595 A JP 16739595A JP H0914171 A JPH0914171 A JP H0914171A
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- Prior art keywords
- fluid
- pump
- discharge
- flow rate
- impeller
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- 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.)
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Links
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- Control Of Positive-Displacement Pumps (AREA)
- Control Of Non-Positive-Displacement Pumps (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、複合サイクル発電
プラントに適用される給水ポンプ等の共通の吸込口から
流体を吸い込み、個別の吐出口からそれぞれ流体を吐出
する２以上の羽根車を有するポンプに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pump having two or more impellers for sucking fluid from a common suction port of a feed water pump or the like applied to a combined cycle power plant and discharging the fluid from individual discharge ports. Regarding
【０００２】[0002]
【従来の技術】中型及び大型の給水ポンプにおいては、
制御上の要求により流量を減少させて行くと、ポンプ効
率の減少と流量の減少の相乗効果によって内部流体の温
度が上昇し、最終的にはキャビテーション（羽根車内部
での流体の気化）現象が発生して、揚水不能、回転体の
振動増大及び焼き付き発生が生起する。このために、従
来より系統上に必要な流量が減少した際にもポンプを通
過する流れが必要最小流量を下回らぬように吐出系統に
バイパスラインが設置されている。2. Description of the Related Art In medium and large size water supply pumps,
When the flow rate is reduced due to control requirements, the internal fluid temperature rises due to the synergistic effect of reduced pump efficiency and reduced flow rate, and eventually cavitation (fluid vaporization inside the impeller) phenomenon occurs. As a result, pumping is impossible, vibration of the rotor increases, and seizure occurs. For this reason, a bypass line is installed in the discharge system so that the flow passing through the pump does not fall below the required minimum flow rate even when the flow rate required on the system decreases.
【０００３】共通の吸込口から流体を吸い込み独立した
個別の２系統以上の羽根車と吐出口を有し各吐出口から
流体を吐出するポンプの場合には、全ての吐出系統に個
々にバイパスラインを設けている。例えば、図５に示す
ように、共通の吸込口と独立した２系統の羽根車を備え
たポンプ２０に前記独立した２系統の羽根車より吐出さ
れる２個の独立した吐出口２２ａ，２２ｂを設け、同吐
出口２２ａ，２２ｂにそれぞれ接続され吐出流量制御弁
２６ａ，２６ｂを有する吐出側ライン２５ａ，２５ｂ
に、バイパス弁２４ａ，２４ｂを有するバイパスライン
２３ａ，２３ｂがそれぞれ接続されている。In the case of a pump which sucks fluid from a common suction port and has two or more independent individual impellers and discharge ports and discharges fluid from each discharge port, bypass lines are individually provided to all discharge systems. Is provided. For example, as shown in FIG. 5, a pump 20 provided with a common suction port and two independent system impellers is provided with two independent discharge ports 22a and 22b discharged from the independent two system impellers. Discharge side lines 25a, 25b provided and having discharge flow rate control valves 26a, 26b respectively connected to the discharge ports 22a, 22b.
To the bypass lines 23a and 23b having the bypass valves 24a and 24b, respectively.
【０００４】また、共通の吸込口から流体を吸い込み、
独立した個別の２系統以上の羽根車と吐出出口を有し、
各吐出から流体を吐出する型式のポンプの場合に、全て
の吐出系統にバイパスラインを設ける前記の技術に代え
て、１系統の吐出系統にのみバイパスラインを設け、他
の吐出系統の吐出流れの１部を吸込系統へ戻すことによ
って対応している場合もある。Further, the fluid is sucked in through the common suction port,
Having two or more independent impellers and discharge outlets,
In the case of a pump of a type that discharges fluid from each discharge, instead of the above-described technique of providing a bypass line in all discharge systems, a bypass line is provided only in one discharge system and the discharge flow of other discharge systems is In some cases, this can be dealt with by returning a part to the suction system.
【０００５】[0005]
【発明が解決しようとする課題】共通の吸込口から流体
を吸い込み、２系統以上の独立した個別の羽根車と吐出
口を有し各吐出口から流体を吐出するポンプの全ての吐
出系統に個々にバイパスラインを設ける前記の従来の技
術では、全ての吐出系統にバイパス弁をもつバイパスラ
インを必要とし、構造が複雑となり製造コストが嵩むこ
とになる。DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention A pump for sucking fluid from a common suction port and having two or more independent impellers and discharge ports and discharging the fluid from each discharge port is individually provided for all discharge systems. In the above-mentioned conventional technique in which a bypass line is provided in each of the discharge systems, a bypass line having a bypass valve is required for all discharge systems, resulting in a complicated structure and an increase in manufacturing cost.
【０００６】また、共通の吸込口から流体を吸い込み、
２系統以上の独立した個別の羽根車と吐出口を有し各吐
出口から流体を吐出するポンプの１系統の吐出系統にの
みバイパスラインを設け、他の吐出系統の吐出流れの１
部を吸込系統へ戻すようにした前記の従来の技術では、
吸込系統へ戻す各流路に弁を設けて流量を制御しない限
り、個々の系統の流れの要求量にかかわらず一定量の必
要最小流量分を常時加えて流してやる必要があり、ポン
プの大型化や動力の損失を招いていた。Further, the fluid is sucked from the common suction port,
A bypass line is provided only in one discharge system of a pump that has two or more independent impellers and discharge ports, and discharges fluid from each discharge port.
In the above-mentioned conventional technique in which the part is returned to the suction system,
Unless a valve is installed in each flow path to return to the suction system to control the flow rate, it is necessary to constantly add a certain minimum required flow rate regardless of the flow rate demand of each system, thus increasing the size of the pump. It caused a loss of power.
【０００７】本発明は、共通の吸込口から流体を吸い込
み、個別の吐出口からそれぞれ流体を吐出する２以上の
羽根車を有するポンプにおける前記の問題点を解決しよ
うとするものである。The present invention is intended to solve the above-mentioned problems in a pump having two or more impellers for sucking fluid from a common suction port and discharging the fluid from individual discharge ports.
【０００８】[0008]
（１）本発明は、共通の吸込口から流体を吸い込み、個
別の吐出口からそれぞれ流体を吐出する２以上の羽根車
を有するポンプにおいて、１部の羽根車の吐出側と吸込
側とを連通する流路と、前記一部の羽根車の吐出側と吸
込側の流体の温度差に応じて前記流路を流れる流体の流
量を調節する手段とを設けたことを特徴とするポンプ。(1) The present invention relates to a pump having two or more impellers that sucks fluid from a common suction port and discharges fluid from individual discharge ports so that the discharge side and the suction side of a part of the impeller communicate with each other. A pump for controlling the flow rate of the fluid flowing through the flow passage according to the temperature difference between the fluid on the discharge side and the fluid on the suction side of the part of the impeller.
【０００９】（２）また、本発明は、前記（１）のポン
プにおいて、前記流量調節手段が表面と裏面とに接触す
る流体の温度差により変形する板材であることを特徴と
する。(2) Further, the present invention is characterized in that, in the pump of (1), the flow rate adjusting means is a plate material which is deformed due to a temperature difference of a fluid in contact with the front surface and the back surface.
【００１０】本発明では、以上のように、一部の羽根車
の吐出側と吸込側とを連通する流路を設け、この流路中
に、表面と裏面とに接触する流体の温度差により変形す
る板材等の羽根車の吐出側と吸込側の流体の温度差に応
じて前記流路を流れる流体の流量を調節する手段が設け
られているので、流量が多く前記一部の羽根車の吸込側
と吐出側の温度差が小さい場合には、前記流量を調節す
る手段によって前記吐出側と吸込側を連通する流路を流
れる流体の流量は絞られ、吐出側から吸込側への流体の
戻りを最小（場合によっては０）とし、余分な戻り流量
の排除により、ポンプ動力を低く抑えることができる。According to the present invention, as described above, a flow path that connects the discharge side and the suction side of a part of the impeller is provided, and due to the temperature difference of the fluid in contact with the front surface and the back surface in this flow path. Since a means for adjusting the flow rate of the fluid flowing through the flow path according to the temperature difference between the fluid on the discharge side and the fluid on the suction side of the impeller, such as a deformable plate, is provided, the flow rate is large and When the temperature difference between the suction side and the discharge side is small, the flow rate of the fluid flowing through the flow path that connects the discharge side and the suction side is reduced by the means for adjusting the flow rate, and the flow rate of the fluid from the discharge side to the suction side is reduced. Pump power can be kept low by minimizing return (0 in some cases) and eliminating excess return flow.
【００１１】この状態において、系統への必要流量が減
ると、吐出弁の閉操作等で当該系統の吐出側への流量が
抑えられ、効率の低下と吐出流れの減少により吐出側流
体の温度が上昇し始める。吐出側の流体温度がさらに上
昇して吸込側との温度差が大きくなると、前記流量を調
節する手段によって、吐出側と吸込側とを連通する流路
を通って吐出側から吸込側への流体の流れが増大する。
従って、当該系統の羽根車を通過する流体の流量が実質
的に増大し、流体温度の上昇を防ぐことが可能になる。
また、この際吸込側へ流出した高温流体の１部は他系統
の羽根車を通り、他系統の吐出ライン（場合によっては
そのバイパスライン）へ排出され、ポンプ内部の流体の
過度の温度上昇を防ぐことができる。In this state, when the required flow rate to the system decreases, the flow rate to the discharge side of the system is suppressed by closing the discharge valve, etc., and the temperature of the discharge side fluid is reduced due to a decrease in efficiency and a decrease in the discharge flow. Begins to rise. When the temperature of the fluid on the discharge side further rises and the temperature difference from the suction side increases, the fluid from the discharge side to the suction side is passed through the flow path connecting the discharge side and the suction side by means of the flow rate adjusting means. The flow of is increasing.
Therefore, the flow rate of the fluid passing through the impeller of the system is substantially increased, and the rise of the fluid temperature can be prevented.
Further, at this time, a part of the high temperature fluid flowing out to the suction side passes through the impeller of the other system and is discharged to the discharge line of the other system (or its bypass line in some cases), which causes an excessive temperature rise of the fluid inside the pump. Can be prevented.
【００１２】以上の通り、本発明では、簡単な装置によ
って、吐出される流体の流量が減少しても、羽根車を通
過する流体の流量を自動的に増加させてポンプ内部の流
体の温度の上昇が防止され、キャビテーションの発生を
防止することができる。As described above, according to the present invention, even if the flow rate of the fluid to be discharged is reduced, the flow rate of the fluid passing through the impeller is automatically increased by the simple device to control the temperature of the fluid inside the pump. The rise is prevented, and the occurrence of cavitation can be prevented.
【００１３】[0013]
【発明の実施の形態】本発明の実施の一形態を、図１な
いし図４によって説明する。ポンプケーシング１内に
は、羽根車２ａ，２ｂを取付けた主軸３が設けられ、羽
根車２ａ，２ｂの間には、流体をポンプケーシング内に
送り込む吸込ノズル４と同吸込ノズル４に連通しポンプ
ケーシング１内の主軸３のまわりに設けられて羽根車２
ａ，２ｂの流体を供給する吸込室１１が設けられてお
り、吸込ノズル４と吸込室１１によって羽根車２ａ，２
ｂに共通の吸込口が構成されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. A main shaft 3 to which impellers 2a and 2b are attached is provided in the pump casing 1, and a suction nozzle 4 that sends fluid into the pump casing and a pump that communicates with the suction nozzle 4 between the impellers 2a and 2b. The impeller 2 is provided around the main shaft 3 in the casing 1.
A suction chamber 11 for supplying fluids a and 2b is provided, and the impellers 2a and 2a are provided by the suction nozzle 4 and the suction chamber 11.
A common suction port is formed in b.
【００１４】羽根車２ａ，２ｂの吐出側は、それぞれポ
ンプケーシング１の主軸３のまわりに設けられた低圧吐
出室１０ａ、高圧吐出室１０ｂに連通している。前記低
圧吐出室１０ａはポンプケーシング１から流体を吐出す
る低圧吐出ノズル５に連通し、また前記高圧吐出室１０
ｂは、ポンプケーシング１から流体を吐出する高圧吐出
ノズル６に連通しており、低圧吐出室１０ａと低圧吐出
ノズル５及び高圧吐出室と高圧吐出ノズル６は、羽根車
２ａ，２ｂによってそれぞれ流体を吐出する個別の吐出
口を形成している。The discharge sides of the impellers 2a and 2b communicate with a low pressure discharge chamber 10a and a high pressure discharge chamber 10b provided around the main shaft 3 of the pump casing 1, respectively. The low-pressure discharge chamber 10a communicates with a low-pressure discharge nozzle 5 that discharges fluid from the pump casing 1, and the high-pressure discharge chamber 10
b communicates with a high-pressure discharge nozzle 6 that discharges the fluid from the pump casing 1, and the low-pressure discharge chamber 10a and the low-pressure discharge nozzle 5 and the high-pressure discharge chamber and the high-pressure discharge nozzle 6 discharge the fluid by impellers 2a and 2b, respectively. Individual ejection ports for ejection are formed.
【００１５】前記羽根車２ｂは、図１に示すように複数
段（２段）設置されており、前記高圧吐出室１０ｂは最
終段の羽根車２ｂの吐出側に連通している。The impeller 2b is installed in a plurality of stages (two stages) as shown in FIG. 1, and the high pressure discharge chamber 10b communicates with the discharge side of the last stage impeller 2b.
【００１６】図３に示すように、前記低圧吐出ノズル５
は、吐出流量制御弁１６をもちバイパスラインを備えて
いない低圧の吐出ライン１２に接続され、また、前記高
圧吐出ノズル６は、吐出流量制御弁１７をもつ高圧の吐
出ライン１３に接続され、同吐出ライン１３の吐出流量
制御弁１７の上流側の部分には、バイパス弁１５をもつ
バイパスライン１４が接続されている。As shown in FIG. 3, the low pressure discharge nozzle 5
Is connected to a low pressure discharge line 12 having a discharge flow control valve 16 and no bypass line, and the high pressure discharge nozzle 6 is connected to a high pressure discharge line 13 having a discharge flow control valve 17, A bypass line 14 having a bypass valve 15 is connected to a portion of the discharge line 13 upstream of the discharge flow control valve 17.
【００１７】前記低圧吐出室１０と前記吸込室１１との
間には、ポンプケーシング１を穴加工して形成され両者
を連通する連通流路７が設けられており、同連通流路７
の出口部の吸込室１１内の部分には、表面と裏面とに接
触する流体の温度差による熱膨張差によって変形して連
通流路７の吸込室１１への出口を開閉して連通流路７を
流れる流体の流量を調節する流量制御板１１が設けら
れ、同流量制御板１１の１端は押えボルト９を介して吸
込室１１の内壁に取り付けられている。この流量制御板
１１は、低圧吐出室１０と吸込室１１との間の流体温度
差が小さい時には連通流路７の吸込室１１への出口を閉
じ、前記流体温度差が高くなると図２に矢印Ａで示すよ
うに変形して連通流路７の吸込室１１への出口の開度を
徐々に大きくするように構成されている。Between the low pressure discharge chamber 10 and the suction chamber 11, there is provided a communication passage 7 which is formed by making a hole in the pump casing 1 and connects the two.
In the portion of the outlet portion of the inside of the suction chamber 11 which is deformed due to the difference in thermal expansion due to the temperature difference of the fluid contacting the front surface and the back surface, the outlet of the communication passage 7 to the suction chamber 11 is opened and closed to open the communication passage. A flow rate control plate 11 for adjusting the flow rate of the fluid flowing through 7 is provided, and one end of the flow rate control plate 11 is attached to the inner wall of the suction chamber 11 via a holding bolt 9. This flow rate control plate 11 closes the outlet of the communication passage 7 to the suction chamber 11 when the fluid temperature difference between the low pressure discharge chamber 10 and the suction chamber 11 is small, and when the fluid temperature difference increases, the arrow in FIG. It is configured to be deformed as shown by A so that the opening degree of the outlet of the communication passage 7 to the suction chamber 11 is gradually increased.
【００１８】なお、図１ないし図３中矢印は流体の流れ
る方向を示す。The arrows in FIGS. 1 to 3 indicate the direction of fluid flow.
【００１９】本実施例の形態において、低圧吐出室１０
ａ、低圧吐出ノズル５を経て吐出ライン１２へ吐出され
る流体の流量が多いときには、吸込室１１と低圧吐出室
１０ａの流体の温度差が小さく、流量制御板８は連通流
路７の吸込室１１への出口を閉じ、低圧吐出室１０ａか
ら連通流路７を通って吸込室１１へは流体が流れない。In the embodiment, the low pressure discharge chamber 10
a, when the flow rate of the fluid discharged to the discharge line 12 through the low-pressure discharge nozzle 5 is large, the temperature difference between the fluids in the suction chamber 11 and the low-pressure discharge chamber 10a is small, and the flow rate control plate 8 causes the suction chamber of the communication channel 7 to flow. The outlet to 11 is closed, and the fluid does not flow from the low pressure discharge chamber 10a to the suction chamber 11 through the communication passage 7.
【００２０】低圧吐出ノズル５を流れる流量が吐出流量
制御弁１７で制御されて少なくなって来ると、ポンプ効
率の減少と流量の減少の相乗効果によって低圧吐出室１
０ａ内の流体温度が上昇し始める。このようにして、昇
温した低圧吐出室１０ａの流体温度は、昇温していない
吸込室１１の流体温度に比べて高くなるために、熱膨張
差により流量制御板８が変形し、連通流路７の吸込室１
１への出口の開度が大きくなり、連通流路７を通って低
圧吐出室１０ａから吸込室１１へ流れる流体の流量が増
加する。When the flow rate flowing through the low-pressure discharge nozzle 5 is controlled by the discharge flow rate control valve 17 and becomes small, the low-pressure discharge chamber 1 has a synergistic effect of a reduction in pump efficiency and a reduction in flow rate.
The fluid temperature in 0a begins to rise. In this way, the temperature of the fluid in the low-pressure discharge chamber 10a that has risen is higher than that in the suction chamber 11 that has not risen, so the flow control plate 8 is deformed due to the difference in thermal expansion, and the continuous flow Suction chamber 1 of path 7
The opening of the outlet to 1 increases, and the flow rate of the fluid flowing from the low pressure discharge chamber 10a to the suction chamber 11 through the communication flow path 7 increases.
【００２１】これによって、羽根車２ａを通過する流量
は実質的に増大することとなり、流体温度の上昇を防
ぎ、キャビテーションの発生を防止することができる。
また、連通流路７を通って吸込室１１へ流出した低圧吐
出室１０ａからの高温の流体の１部は、他系統の羽根車
２ｂを通って他系統の吐出側ライン１３へ吐出されるこ
ととなり、ポンプ内部の流体の温度上昇を防ぐことがで
きる。As a result, the flow rate passing through the impeller 2a is substantially increased, and the rise in fluid temperature can be prevented and the occurrence of cavitation can be prevented.
Further, a part of the high temperature fluid from the low pressure discharge chamber 10a flowing out to the suction chamber 11 through the communication passage 7 is discharged to the discharge side line 13 of the other system through the impeller 2b of the other system. Therefore, the temperature rise of the fluid inside the pump can be prevented.
【００２２】また、本実施例は、バイパス弁をもつバイ
パスラインは高圧の吐出ライン１３にのみ設けられてい
るので、構成を簡単にすることができる。Further, in this embodiment, since the bypass line having the bypass valve is provided only in the high pressure discharge line 13, the structure can be simplified.
【００２３】ちなみに、ポンプの内部流体温度上昇は、
ポンプ外部への放熱が全く無いとした時、下記の数１で
示される。By the way, the temperature rise of the internal fluid of the pump is
When there is no heat radiation to the outside of the pump, it is expressed by the following equation 1.
【００２４】[0024]
【数１】 (Equation 1)
【００２５】ポンプにおいては、通常この温度（ΔＴ）
を１０〜２０℃以下にしているので、低圧吐出室１０ａ
と吸込室１１との流体の温度差が１０〜２０℃になった
時に、図４に示す最小流量ＱM が流れるように流量制御
板８の形状、熱膨張差による変形度等を設定すれば良
い。In a pump, this temperature (ΔT) is usually used.
Is 10 to 20 ° C or less, the low pressure discharge chamber 10a
If the temperature difference between the fluid in the suction chamber 11 and the temperature in the suction chamber 11 becomes 10 to 20 ° C., the shape of the flow rate control plate 8 and the degree of deformation due to the difference in thermal expansion can be set so that the minimum flow rate Q M shown in FIG. 4 flows. good.
【００２６】なお、前記実施の形態では、連通流路７を
ポンプケーシング１に穴加工して形成しているが、ポン
プ外部の配管で構成するようにすることもできる。In the above-mentioned embodiment, the communication passage 7 is formed by making a hole in the pump casing 1, but it may be formed by a pipe outside the pump.
【００２７】[0027]
【発明の効果】本発明は、共通の吸込口から流体を吸い
込み、個別の吐出口からそれぞれ流体を吐出する２以上
の羽根車を有するポンプにおいて、１部の羽根車の吐出
側と吸込側とを連通する流路と、表面と裏面に接触する
温度差により変形する板等の前記一部の羽根車の吐出側
と吸込側の流体の温度差に応じて前記流路を流れる流体
の流量を調節する手段とを設けたので、以上に説明した
ように、本発明は、簡単な構成の装置によって吐出され
る流体の流量が減少しても羽根車を通過する流体の流量
を自動的に増大させて、ポンプ内部の流体の温度の上昇
を防ぎ、キャビテーションの発生を防止して揚水不能、
回転体の振動増大及び焼き付きの発生を防ぐことができ
る。INDUSTRIAL APPLICABILITY The present invention relates to a pump having two or more impellers which sucks fluid from a common suction port and discharges fluid from individual discharge ports. One part of the impeller has a discharge side and a suction side. The flow rate of the fluid flowing through the flow passage in accordance with the temperature difference between the discharge side and the suction side fluid of the part of the impeller such as a plate that deforms due to the temperature difference in contact with the front surface and the back surface. With the provision of the adjusting means, as explained above, the present invention automatically increases the flow rate of the fluid passing through the impeller even if the flow rate of the fluid discharged by the device having a simple structure decreases. This prevents the temperature of the fluid inside the pump from rising and prevents the occurrence of cavitation, making it impossible to pump water.
It is possible to prevent an increase in vibration of the rotor and the occurrence of image sticking.
【図１】本発明の実施の一形態に係るポンプの全体図で
ある。FIG. 1 is an overall view of a pump according to an embodiment of the present invention.
【図２】前記実施の形態の要部の拡大図である。FIG. 2 is an enlarged view of a main part of the embodiment.
【図３】前記実施の形態におけるポンプまわりの系統図
である。FIG. 3 is a system diagram around a pump in the embodiment.
【図４】ポンプ性能と温度上昇、最小流量の関係を示す
図である。FIG. 4 is a diagram showing the relationship between pump performance, temperature rise, and minimum flow rate.
【図５】従来のポンプまわりの系統図である。FIG. 5 is a system diagram around a conventional pump.
１ ポンプケーシング ２ａ，２ｂ 羽根車 ３ 主軸 ４ 吸込ノズル ５ 低圧吐出ノズル ６ 高圧吐出ノズル ７ 連通流路 ８ 流量制御板 ９ 押えボルト １０ａ 低圧吐出室 １０ｂ 高圧吐出室 １１ 吸込室 １２，１３ 吐出ライン １４ バイパスライン １５ バイパス弁 １６，１７ 吐出流量制御弁 1 Pump Casing 2a, 2b Impeller 3 Spindle 4 Suction Nozzle 5 Low Pressure Discharge Nozzle 6 High Pressure Discharge Nozzle 7 Communication Channel 8 Flow Control Plate 9 Presser Bolt 10a Low Pressure Discharge Chamber 10b High Pressure Discharge Chamber 11 Suction Chamber 12, 13 Discharge Line 14 Bypass Line 15 Bypass valve 16, 17 Discharge flow control valve
Claims (2)
の吐出口からそれぞれ流体を吐出する２以上の羽根車を
有するポンプにおいて、１部の羽根車の吐出側と吸込側
とを連通する流路と、前記一部の羽根車の吐出側と吸込
側の流体の温度差に応じて前記流路を流れる流体の流量
を調節する手段とを設けたことを特徴とするポンプ。1. A pump having two or more impellers that sucks fluid from a common suction port and discharges fluid from individual discharge ports, and a flow that connects the discharge side and suction side of a part of the impeller. A pump provided with a passage and means for adjusting a flow rate of the fluid flowing through the flow passage according to a temperature difference between the fluid on the discharge side and the fluid on the suction side of the part of the impeller.
に接触する流体の温度差により変形する板材であること
を特徴とする請求項１に記載のポンプ。2. The pump according to claim 1, wherein the means for adjusting the flow rate is a plate material that is deformed due to a temperature difference between fluids contacting the front surface and the back surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16739595A JP3310822B2 (en) | 1995-07-03 | 1995-07-03 | pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16739595A JP3310822B2 (en) | 1995-07-03 | 1995-07-03 | pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0914171A true JPH0914171A (en) | 1997-01-14 |
| JP3310822B2 JP3310822B2 (en) | 2002-08-05 |
Family
ID=15848911
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16739595A Expired - Fee Related JP3310822B2 (en) | 1995-07-03 | 1995-07-03 | pump |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3310822B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11351177A (en) * | 1998-05-15 | 1999-12-21 | Cryostar France Sa | Cryogenic rotary pump and cryogenic air separator |
| CN109340135A (en) * | 2018-12-15 | 2019-02-15 | 阜宁隆德机械制造有限责任公司 | A kind of water pump of regulating flow quantity |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54137701A (en) * | 1978-04-19 | 1979-10-25 | Ishikawajima Harima Heavy Ind Co Ltd | Multistage voluminous belching pump |
| JPS5732098A (en) * | 1980-07-31 | 1982-02-20 | Mitsubishi Heavy Ind Ltd | Control method for recycling valve of pump |
| JPS63215868A (en) * | 1987-03-04 | 1988-09-08 | Nippon Denso Co Ltd | In-tank type fuel pump for vehicle |
| JPH04128597A (en) * | 1990-09-20 | 1992-04-30 | Mitsubishi Heavy Ind Ltd | Pump discharge pressure switching device for multi-stage pump |
| JPH0495859U (en) * | 1991-01-18 | 1992-08-19 |
-
1995
- 1995-07-03 JP JP16739595A patent/JP3310822B2/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54137701A (en) * | 1978-04-19 | 1979-10-25 | Ishikawajima Harima Heavy Ind Co Ltd | Multistage voluminous belching pump |
| JPS5732098A (en) * | 1980-07-31 | 1982-02-20 | Mitsubishi Heavy Ind Ltd | Control method for recycling valve of pump |
| JPS63215868A (en) * | 1987-03-04 | 1988-09-08 | Nippon Denso Co Ltd | In-tank type fuel pump for vehicle |
| JPH04128597A (en) * | 1990-09-20 | 1992-04-30 | Mitsubishi Heavy Ind Ltd | Pump discharge pressure switching device for multi-stage pump |
| JPH0495859U (en) * | 1991-01-18 | 1992-08-19 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11351177A (en) * | 1998-05-15 | 1999-12-21 | Cryostar France Sa | Cryogenic rotary pump and cryogenic air separator |
| CN109340135A (en) * | 2018-12-15 | 2019-02-15 | 阜宁隆德机械制造有限责任公司 | A kind of water pump of regulating flow quantity |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3310822B2 (en) | 2002-08-05 |
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| A01 | Written decision to grant a patent or to grant a registration (utility model) |
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