CN104806529A - Axial-force self-balancing multi-stage centrifugal pump - Google Patents
Axial-force self-balancing multi-stage centrifugal pump Download PDFInfo
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- CN104806529A CN104806529A CN201410035689.1A CN201410035689A CN104806529A CN 104806529 A CN104806529 A CN 104806529A CN 201410035689 A CN201410035689 A CN 201410035689A CN 104806529 A CN104806529 A CN 104806529A
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Abstract
The invention discloses an axial-force self-balancing multi-stage centrifugal pump. The axial-force self-balancing multi-stage centrifugal pump is characterized in that a high-pressure water diversion hole is opened in the wall of a high-pressure water discharge chamber of a pump, a damping hole communicated with the high-pressure water diversion hole is opened in a balancing ring, a certain gap remains between a balancing plate and the balancing ring to form a pressure chamber, the high-pressure water diversion hole, damping hole and pressure chamber are communicated, an annular V-shaped groove is formed in the outer edge of the working surface of the balancing plate, an annular V-shaped bump is arranged on the outer edge of the working surface of the balancing ring, the annular V-shaped groove in the working surface of the balancing plate and the V-shaped bump on the working surface of the balancing ring are assembled in a nesting mode to form an annular V-shaped flow passage, the V-shaped flow passage is communicated with a water return cavity, the water return cavity is provided with a water discharge pipe, the water discharge pipe is communicated with a water return pipe, and the water return pipe is communicated with a suction chamber of the pump. The axial-force self-balancing multi-stage centrifugal pump is simple in structure, stable in performance and capable of prolonging the service life of the pump, improving the machine efficiency and guaranteeing the production safety, and the multi-stage centrifugal pump always locates at the axial-force self-balancing state when working.
Description
Technical field
The present invention relates to a kind of multistage centrifugal pump carrying liquid, particularly a kind of axial force self-balancing multiple stage centrifugal pump.
Background technique
When multistage centrifugal pump rotates, axle produces larger axial force, this axial force will pull rotor to produce and move axially, and therefore, must balance or eliminate axial force.In existing multistage centrifugal pump, many employings Balance disc is axial force balance structure, this equilibrium structure is made up of the Balance disc be fixed on main shaft and the gimbal be fixed on the pump housing, Balance disc and gimbal cooperatively interact, the radial clearance that usual Balance disc coordinates with gimbal very little (0.05mm), and axial distance comparatively large (45mm), high-pressure liquid flows through radial clearance to Balance disc from hyperbaric chamber, pressure loss is huge, pressure effect oneself cannot overcome axial force, Balance disc can only press against on gimbal under responsive to axial force, the support of gimbal is relied on to overcome axial force.If increase radial clearance, flow and pressure wayward, pump shaft easily back and forth vibration produce vibration and impact.When multistage centrifugal pump work, improper owing to designing, assembling, or the reason such as technological fluctuation, Balance disc can not equilbrium running time produce axial force time, axial force will pull rotor to produce and move axially, Balance disc is made to abut on gimbal, Balance disc and the raw dry friction of balance environment-development, cause the heavy wear of Balance disc and gimbal, in the pump operation later stage, cause the wearing and tearing of running wheel and body in pump, and the damage of other parts, maintenance load increases, simultaneously because responsive to axial force causes high pressure centrifugal pump running resistance to increase, power consumption increases, pump efficiency reduces, use middle because of motor overload frequent, there is motor damage, make high pressure centrifugal pump operating cost higher.The centrifugal pump Problems existing large for progression multiple pressure power large generation axial force is especially outstanding.
Summary of the invention
The object of the invention is to overcome above-mentioned deficiency of the prior art, a kind of novel axial force self-balancing multiple stage centrifugal pump is provided, prevent Balance disc from abutting on gimbal and dry friction occurs, extend the working life of pump, improve overall efficiency, reduce power consumption, ensure production safety.
The present invention realizes its object as follows: described axial force self-balancing multiple stage centrifugal pump comprises the pump housing, end cap, pump shaft, axle sleeve, bearing, water inlet, entrance supports sits suction chamber, suction port impeller, suction port fixes impeller, stage casing impeller, fixing impeller, high-pressure water outlet, packing_seal, priming valve, coupling, pump shaft is floating axle, can move axially, it is characterized in that extruding on locular wall at the high pressure water of pump having a high pressure water priming hole, gimbal has a damping hole be communicated with high pressure priming hole, leave certain interval between Balance disc and gimbal, form a pressure chamber, high pressure water priming hole, damping hole is connected with pressure chamber, Balance disc working surface outer rim there is ring-type v-depression, gimbal working surface outer rim there is ring-type V-arrangement protruding, be positioned at the ring-type v-depression on Balance disc working surface and the V-arrangement projection on gimbal working surface is nested, form endless v-runner, control high pressure water and flow out, V-type runner is connected with backwater cavity, backwater cavity has an outlet pipe, outlet pipe is connected with return pipe, and return pipe is connected with the water intake of pump again.V-arrangement annular projection on gimbal working surface and the ring-type v-depression tabling on Balance disc working surface, the V-type angle of the protruding V-type groove of V-type is identical.Gimbal has the damping hole of 4 different pore sizes, can the real work point of root Ju multistage pump, the damping hole adopted when determining optimum working efficiency.The water sucked from the water inlet of pump is through the acceleration of multi-stage impeller, high pressure water is formed at the delivery chamber of pump, at this moment, the high pressure water of pump extrudes high pressure water priming hole on locular wall and high pressure water is directly introduced pressure chamber between Balance disc and gimbal through damping hole, the high pressure water pressure loss introducing pressure chamber is little, Balance disc is balancing axial thrust under the pressure effect of high pressure water, and there is liquid film between v-shaped gap, forms liquid lubrication between Balance disc and gimbal.The high pressure water flowed out from pressure chamber is by the suction chamber of V-type runner, backwater cavity, outlet pipe, return pipe again inflow pump.When centrifugal pump normally works, the balanced action of Balance disc is substantially constant; When Balance disc unbalance and can not balancing axial thrust time, Balance disc is close to gimbal under the effect of axial force, V-arrangement projection in ring-type v-depression in Balance disc working surface outer rim and gimbal working surface outer rim is also close gradually, V-type runner closes gradually, runner section reduces gradually, at this moment, the high pressure water flow flowed out from pressure chamber reduces gradually, circulate not smooth, the pressure that high pressure water in pressure chamber produces sharply increases, and the equilibrant contrary with axial force that Balance disc working surface is formed also sharply increases.When Balance disc working surface and gimbal working surface are when nearer, V-type runner is more closed, runner section is less, the pressure that high pressure water in pressure chamber produces is larger, the equilibrant produced is also larger, thus reach balancing axial thrust, the Balance disc that prevents contacts with gimbal working surface and the object that rubs occurs.When pump axial force is little time, main shaft moves to Way out, and V-type runner cross-sectional area increases, and resistance reduces, and flow increases, and pressure chamber's pressure reduces, and equilibrant is decreased to axial force suitable, reaches axial force balance.Thus make multistage from many pumps in working order under be in axial force self-balancing state all the time.
The present invention has following advantages and extremely long-pending effect: structure is simple, easy for installation, stable performance, multistagely operationally be in axial force self-balancing state all the time from many pumps, can prevent the Balance disc of multistage centrifugal pump from abutting on gimbal completely and dry friction occurs, prevent the wearing and tearing of running wheel and body, extend the working life of pump, improve overall efficiency, reduce power consumption, ensure production safety.
Accompanying drawing explanation
Fig. 1 is axial force self-balancing multiple stage centrifugal pump structural representation;
Fig. 2 is pressure chamber structure schematic diagram of the present invention;
Fig. 3 is gimbal sectional drawing of the present invention;
Fig. 4 is gimbal planimetric map of the present invention
Fig. 5 is Balance disc sectional drawing of the present invention;
Fig. 6 is Balance disc planimetric map of the present invention
Embodiment
The present invention is described further for the embodiment provided below in conjunction with accompanying drawing.In figure 1, 17 is end cap, 2, 15 is bearing, 3 is high-pressure water outlet, 4 is that V-type is protruding, 5 is V-type groove, 6 is packing_seal, 7 is damping hole, 8 is high pressure water priming hole, 9 is the pump housing, 10 is stage casing impeller, 11 is fixing impeller, 12 is water inlet, 13 is priming valve, 14 sit for entrance supports, 16 is axle sleeve, 18 is coupling, 19 is bolt, 20 is Balance disc, 21 is gimbal, 22 is backwater cavity, 23 is outlet pipe, 24 is high pressure water delivery chamber, 25 is pressure chamber, 26 is return pipe, 27 fix impeller for suction port, 28 is suction port backwater hole, 29 is suction port impeller, 30 is pump shaft, 31 is suction chamber, 32 is screw hole, 33 is installing technological hole.
Closed by centrifugal pump outlet valve, by priming valve 13 to topped up with water in multistage centrifugal pump, try to rotate pump shaft 30, hand can coil pump shaft 30, ready enable switch, by pump no load running, progressively opens flowing water Valve.When multistage centrifugal pump is dynamic turn time, the high pressure water delivery chamber 24 of pump produces high pressure water and flows out, simultaneously, flow through the partial high pressure water of high pressure water delivery chamber 24, high pressure water is introduced in the pressure chamber 25 between Balance disc 20 and gimbal 21 by the high pressure water priming hole 8 on high pressure water delivery chamber 24 inwall and the damping hole 7 on gimbal 21, Balance disc 20 is open under the pressure effect of high pressure water, forms liquid lubrication between Balance disc 20 and gimbal 21.The high pressure water flowed out from pressure chamber 25 is by the suction chamber 31 of V-type runner 15, backwater cavity 22, outlet pipe 23, return pipe 26 again inflow pump.When multistage centrifugal pump normally works, the balanced action of Balance disc 20 is substantially constant; When Balance disc 20 unbalance and can not balancing axial thrust time, Balance disc 20 is close to gimbal 21 under the effect of axial force, ring-type V groove 5 in the working surface outer rim of Balance disc 20 is also close gradually with the ring-type V-arrangement projection 4 in gimbal 21 working surface outer rim, V-type runner closes gradually, runner section reduces gradually, at this moment, the high pressure water flow flowed out from pressure chamber 25 reduces gradually, circulate not smooth, the pressure that high pressure water in pressure chamber 25 produces sharply increases, and the equilibrant contrary with axial force that the working surface of Balance disc 20 is formed also sharply increases.When the working surface of Balance disc 20 and the working surface of gimbal 21 are when nearer, V-type runner is more closed, runner section is less, the pressure that high pressure water in pressure chamber 25 produces is larger, the equilibrant produced is also larger, thus reach balancing axial thrust, the Balance disc 20 that prevents contacts with gimbal 21 working surface and the object that rubs occurs.
Claims (3)
1. an axial force self-balancing multiple stage centrifugal pump, comprises the pump housing (9), end cap (1, 17), pump shaft (30), axle sleeve (16), bearing (2, 5), water inlet (12), entrance supports sits (14), suction chamber (31), suction port impeller (29), suction port fixes impeller (27), stage casing impeller (10), fixing impeller (11), high-pressure water outlet (3), packing_seal (6), priming valve (13), coupling (18), it is characterized in that having a high pressure water priming hole (8) on the wall of the high pressure water delivery chamber (24) of pump, gimbal (21) has a damping hole (7) be communicated with high pressure priming hole (8), certain interval is left between Balance disc (20) and gimbal (21), form a pressure chamber (25), high pressure water priming hole (8), damping hole (7) is connected with pressure chamber (25), Balance disc (20) working surface outer rim there is ring-type v-depression (5), gimbal (21) working surface outer rim there is ring-type V-arrangement projection (4), the ring-type v-depression (5) be positioned on Balance disc (20) working surface rises with the V-arrangement projection (4) on gimbal (21) working surface and is nested, form endless v-runner, V-type runner is connected with backwater cavity (22), backwater cavity (22) there is an outlet pipe (23), outlet pipe (23) is connected with return pipe (26), and return pipe (26) is connected with the suction chamber (31) of pump again.
2. axial force self-balancing multiple stage centrifugal pump according to claim 1, it is characterized in that the ring-type V-arrangement projection (4) on gimbal (21) working surface and ring-type v-depression (5) tabling on Balance disc (20) working surface, V-type projection (4) is identical with the V-type angle of V-type groove (5).
3. axial force self-balancing multiple stage centrifugal pump according to claim 1, is characterized in that the damping hole (7) gimbal (21) having 4 different pore sizes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410035689.1A CN104806529A (en) | 2014-01-24 | 2014-01-24 | Axial-force self-balancing multi-stage centrifugal pump |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410035689.1A CN104806529A (en) | 2014-01-24 | 2014-01-24 | Axial-force self-balancing multi-stage centrifugal pump |
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| CN104806529A true CN104806529A (en) | 2015-07-29 |
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| CN201410035689.1A Pending CN104806529A (en) | 2014-01-24 | 2014-01-24 | Axial-force self-balancing multi-stage centrifugal pump |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105402156A (en) * | 2015-12-03 | 2016-03-16 | 普仑斯(福建)泵业有限公司 | External axial force balancing device and mounting method thereof |
| CN114060286A (en) * | 2020-08-07 | 2022-02-18 | 日立安斯泰莫株式会社 | Two-stage centrifugal pump |
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| RU2003844C1 (en) * | 1991-04-15 | 1993-11-30 | Институт проблем транспорта энергоресурсов "ИПТЭР" | Hydraulic unloading device of centrifugal pump |
| RU2027072C1 (en) * | 1991-03-19 | 1995-01-20 | Сумский физико-технологический институт | Centrifugal pump |
| CN1811199A (en) * | 2005-01-30 | 2006-08-02 | 陆雄 | Dynamic regulation method of axial force in multistage centrifugal pump with balance disc to balance axial force |
| CN2816440Y (en) * | 2005-06-06 | 2006-09-13 | 昆明冶金高等专科学校 | Axial-force balancing structure of multi-stage centrifugal pump |
| CN101576085A (en) * | 2009-02-27 | 2009-11-11 | 兰州明德安全技术有限公司 | Low plus hydrophobic magnetic pump |
| CN201687754U (en) * | 2010-03-31 | 2010-12-29 | 湖南湘电长沙水泵有限公司 | Axial force balance mechanism of sectioned multi-stage centrifugal pump |
| CN102913452A (en) * | 2012-09-12 | 2013-02-06 | 上海凯泉泵业（集团）有限公司 | First-stage positive-symmetric double-suction segment type multi-stage centrifugal pump |
| CN203730333U (en) * | 2014-01-24 | 2014-07-23 | 昆明冶金高等专科学校 | Axial force self-balancing multiple-stage centrifugal pump |
-
2014
- 2014-01-24 CN CN201410035689.1A patent/CN104806529A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2027072C1 (en) * | 1991-03-19 | 1995-01-20 | Сумский физико-технологический институт | Centrifugal pump |
| RU2003844C1 (en) * | 1991-04-15 | 1993-11-30 | Институт проблем транспорта энергоресурсов "ИПТЭР" | Hydraulic unloading device of centrifugal pump |
| CN1811199A (en) * | 2005-01-30 | 2006-08-02 | 陆雄 | Dynamic regulation method of axial force in multistage centrifugal pump with balance disc to balance axial force |
| CN2816440Y (en) * | 2005-06-06 | 2006-09-13 | 昆明冶金高等专科学校 | Axial-force balancing structure of multi-stage centrifugal pump |
| CN101576085A (en) * | 2009-02-27 | 2009-11-11 | 兰州明德安全技术有限公司 | Low plus hydrophobic magnetic pump |
| CN201687754U (en) * | 2010-03-31 | 2010-12-29 | 湖南湘电长沙水泵有限公司 | Axial force balance mechanism of sectioned multi-stage centrifugal pump |
| CN102913452A (en) * | 2012-09-12 | 2013-02-06 | 上海凯泉泵业（集团）有限公司 | First-stage positive-symmetric double-suction segment type multi-stage centrifugal pump |
| CN203730333U (en) * | 2014-01-24 | 2014-07-23 | 昆明冶金高等专科学校 | Axial force self-balancing multiple-stage centrifugal pump |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105402156A (en) * | 2015-12-03 | 2016-03-16 | 普仑斯(福建)泵业有限公司 | External axial force balancing device and mounting method thereof |
| CN105402156B (en) * | 2015-12-03 | 2017-08-25 | 普仑斯(福建)泵业有限公司 | A kind of external axial thrust balancing devices and its installation method |
| CN114060286A (en) * | 2020-08-07 | 2022-02-18 | 日立安斯泰莫株式会社 | Two-stage centrifugal pump |
| CN114060286B (en) * | 2020-08-07 | 2023-09-22 | 日立安斯泰莫株式会社 | Two-stage centrifugal pump |
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Application publication date: 20150729 |
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| RJ01 | Rejection of invention patent application after publication |