CN104929985A - Preposed degassing centrifugal pump - Google Patents
Preposed degassing centrifugal pump Download PDFInfo
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- CN104929985A CN104929985A CN201510217659.7A CN201510217659A CN104929985A CN 104929985 A CN104929985 A CN 104929985A CN 201510217659 A CN201510217659 A CN 201510217659A CN 104929985 A CN104929985 A CN 104929985A
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- degassed
- preposition
- centrifugal pump
- blade
- degassing
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Abstract
The invention discloses a preposed degassing centrifugal pump which comprises a volute, a preposed pipe, a degassing rotating drum and a gas suction pipe, wherein the volute is provided with an inlet and internally provided with a pump shaft; the preposed pipe is fixedly butted with the inlet; the degassing rotating drum is positioned in the preposed pipe and coaxially linked with the pump shaft; one end of the gas suction pipe stretches into an axis part of the degassing rotating drum; and the other end of the gas suction pipe penetrates out of the preposed pipe. According to the preposed degassing centrifugal pump, by employing a centrifugal force and the characteristic that the solubility of gas in liquid is decreased with the decreasing of pressure, the gas dissociated and dissolved in the liquid is separated out by the degassing rotating drum, and exhausted by the gas suction pipe, and the degassed liquid is pressurized and conveyed out by the centrifugal pump, so that the preposed degassing centrifugal pump has the characteristics of good degassing effect, wide working range, simple structure and higher flexibility.
Description
Technical field
The present invention relates to gas-liquid separation field, be specifically related to a kind of preposition degassed centrifugal pump, for removing gas that is free and that dissolve in a liquid while Liquid transfer.
Background technique
In the food industry, nectar, in the process of squeezing the juice and stir, can be mixed into more air, comprises dissolved gases in free bubble and liquid.Aborning, usually needing these gases removed in liquid, as being oxidized to prevent fruit juice the degassing operation of fruit juice, milk, extending storage period.
In food industry, conventional vacuum receiver carries out degassed to feed liquid, and degassing tank adopts spray structure substantially, during use, material enters tank from tank deck material feeding mouth with vaporific, and gas-liquid mixed is even, because gas is different from the density of liquid, liquid sedimentation is at the bottom of tank, and gas floats on top.There is provided degassing pressure by Nash hytor, outlet is a centrifugal pump, and distribution Direct box control apparatus runs, when in tank, degree of vacuum reaches technological requirement, material can be extracted out, as long as keep the balance of degree of vacuum and feeding and discharging, just sustainable production from material outlet.
In pulp production, need the paper pulp of the higher air content of conveying, in pulp pump, be provided with air extractor.Air suction mode also has multiple, bleeding point has and is arranged on impeller rear portion, also has and is arranged on impeller front portion.In Oil-gas Separation process, cylindrical gas-liquid cyclone separator has a wide range of applications.Cyclone separator realizes the separation of gas-liquid two-phase by the rotating centrifugal effect of fluid, and gas-liquid mixture fluid tangentially enters, gas outlet upper, liquid outlet under.
Chinese patent literature CN103977917A discloses the box-like Liquid liquid Separation machine of a kind of cyclone separator-centrifugal chiller.This seperator is primarily of cyclone separator and centrifuge two-part composition.Cyclone separator is made up of whirl cylinder, supply pipe and spill pipe, and supply pipe tangentially inserts in whirl cylinder left end side, and spill pipe is positioned at whirl cylinder left end and coaxially overhanging with whirl cylinder.Cyclone separator maintains static.Described centrifuge is made up of left bearing, rotating cylinder and right bearing.Centrifugal basket is made up of rotating cylinder neck, rotating cylinder horn mouth, rotating cylinder large cylinder, rotating cylinder cone cylinder and the little cylinder of rotating cylinder.Rotating cylinder is supported on left bearing and right bearing, by the belt pulley driven rotary being positioned at its right-hand member.This invention effectively can solve the separation of high concentration, high viscosity or low interfacial tension liquid liquid mixed solution.But the gross blowhole that similar centrifugal separator only can be free in separating liquid, be difficult to effective separation, and this centrifuge also needs extra feedway in running for dissolving gas in a liquid.
Chinese patent literature CN103423205A discloses a kind of centrifugal degassed transfer pump.This pump comprises the housing of in-built pump shaft, housing has the bleed-off passage for external vacuum suction device, the entry port of housing is connected with the throttling arrangement for gas-liquid pre-separation, pump shaft is provided with vertically successively preposition separation impeller, main impeller and the first sealing impeller, preposition separation impeller is arranged on pump shaft one end near entry port, and the first sealing impeller is arranged between main impeller and bleed-off passage.By throttling arrangement by the gas evolution in liquid, recycling turbine centrifugal power is different from the action effect of liquid to gas, realizes gas-liquid separation.This degassed pump can effective separating liquid Free Gas body, but the dissolved gas in more difficult separating liquid.And when the air content in liquid is larger, easily cause impeller eye to block.Bleeding point is arranged on impeller rear, while bleeding, also has a small amount of liquid to be pumped.
Summary of the invention
The invention provides the preposition degassed centrifugal pump that a kind of degasifying effect is good.
A preposition degassed centrifugal pump, comprises with entrance and the spiral case of built-in pump shaft, also comprises:
Preposition pipe, fixedly docks with described entrance;
Degassing drum, be positioned at preposition pipe and with described pump shaft coaxial linkage;
Exhaust tube, one end extends into the axis position of degassing drum, and the other end passes preposition pipe.
The external vacuum pump of exhaust tube is used for bleeding.Liquid enters preposition pipe by exterior line, flows to degassing drum.Degassing drum is one end guiding flow direction degassing drum of pipeline and the gap of preposition inner tube wall towards the outside.At this gap location, degassing drum drives liquid in rotation, forms the pendular ring of High Rotation Speed, when rotating speed and flow certain, the thickness of pendular ring is determined by the pressure of the inlet pressure of device and the external vacuum pump of exhaust tube, and free gas in a liquid realizes being separated under the influence of centrifugal force.Under the acting in conjunction of centrifugal pump of the present invention and external vacuum pump, degassing drum inside produces negative pressure, and utilize gas solubility with pressure in a liquid to reduce and the feature that reduces, the gas dissolved in a liquid is also separated.Gas is got rid of by exhaust tube, and the liquid after degassed enters in spiral case, transfers out after impeller pressurization.
As preferably, described degassing drum comprises:
Support ring, near pump shaft side and being fixedly connected with centrifugal pump impeller wheel hub;
Flow deflecting cone, away from pump shaft side and vertex of a cone centrifugal pump dorsad;
Degassed blade, to be connected between support ring and flow deflecting cone and to be circumferentially distributed with polylith.
Support ring and impeller are fixed, and are subject to impeller and support, and isometrical with impeller hub, be distributed in degassed blade on support ring, and play guide functions for supporting circumference.It is 30 ~ 60 degree that flow deflecting cone plays guide functions flow deflecting cone drift angle; Degassed blade drives liquid in rotation to form pendular ring.
As preferably, described exhaust tube stretches in degassing drum along flow deflecting cone axis, and flow deflecting cone take exhaust tube as axle is rotatably assorted.Exhaust tube is played a supporting role to flow deflecting cone, improves the stability that degassing drum rotates.
As preferably, described in be rotatably assorted and realized by a pair stuffing box bearing.Sealing bearing is water lubriucated bearing, and bearing play is 0.2 ~ 0.5mm.During centrifugal pump work of the present invention, even if a small amount of liquid leaks into degassing drum inside from bearing play, radially move under the effect of rotary centrifugal force, and incorporate in the pendular ring of High Rotation Speed, can not degasifying effect be affected.
As preferably, described exhaust tube is L shape, and the one end away from degassing drum passes from preposition pipe sidewall, external vacuum pump.Be provided with the uniform stiffening rib of polylith in described preposition pipe, stiffening rib is slab, and one end is fixed on preposition inner tube wall, and the other end is fixed on exhaust tube, for firm exhaust tube.The quantity of stiffening rib is 2 ~ 5.
As preferably, the internal diameter of preposition pipe is D, and the internal diameter of described exhaust tube is d, meets 0.1D < d < 0.2D.Exhaust tube is meticulous, and support stiffness is not enough; Exhaust tube is excessively thick, and flow resistance increases.
As preferably, the described degassed blade part be between support ring and flow deflecting cone is effective length L, and the internal diameter of preposition pipe is D, meets D < L < 2D.
As preferably, the two ends of described degassed blade are separately fixed on the outer wall of support ring and flow deflecting cone.
As preferably, described degassed blade is slab, and width is B, and the thickness of degassed blade is h, and the gap of degassed blade and preposition inner tube wall is δ, meets B=(2 ~ 4) h, h > δ.
As preferably, described flow deflecting cone is towards the side of centrifugal pump with isometrical section, and isometrical section of axial length is L1, meets h < L1 < 3h.
As preferably, the quantity of described degassed blade is 4 ~ 10.
As preferably, described preposition pipe is made up of reducer pipe and intervalve, facilitates the installing/dismounting of degassing drum and exhaust tube.Described stiffening rib is located in reducer pipe, and described degassing drum is located in intervalve, and described spiral case is communicated with intervalve.Reducer pipe adopts screw thread loose joint mode to be communicated with exterior line, and is amplified to consistent with intervalve to meet device needs by exterior line diameter by caliber.Reducer pipe tapering is 20 ~ 50 degree.
As preferably, described pump shaft is driven by a motor, and this motor adopts direct-connected mode transmission, is connected between described spiral case with this motor by link press span.Motor direct-connected transmission has compact structure, and concentricity is accurate, shakes less, the feature that efficiency is higher.For realizing direct-connected transmission, described pump shaft one end is an axle sleeve, axle sleeve has the groove of 3 axis, and this axle sleeve coordinates in link press span with the motor shaft of motor; Axle sleeve is provided with supported flange, is tightened together by motor shaft under the effect of turnbuckle with pump shaft, and the seal face gradient of described supported flange is 5 ~ 15 degree.
As preferentially, described impeller comprises the impeller plate fixing with pump shaft, and the impeller plate is provided with blade towards the side of degassing drum.The effect of blade is by liquid pressing and transfers out.Enclosed blade efficiency is higher, hacks impeller and is convenient to clean.
As preferably, blade is open type or semi-open type; The gap of blade and spiral case inwall is 0.3 ~ 1mm, and the impeller plate is 0.3 ~ 1mm away from the side of degassing drum and the gap of link press span, and the sheet number of blade is 4 ~ 10, to reduce headloss, improves impeller working efficiency.
As preferably, by being with the first screw thread loose joint on inclined-plane to be connected between described reducer pipe and intervalve, by being with the second screw thread loose joint on inclined-plane to be connected between described intervalve and spiral case, be convenient to dismounting.
The invention has the beneficial effects as follows:
1, present invention employs preposition degassing drum, gas be separated before entering impeller region, not easily cause the blocking of pump intake, degasification scope and deaeration capability stronger.The low pressure area that degassing drum inside is formed also can effectively be separated for the gas dissolved in a liquid.
2, present invention employs preposition exhaust tube structure, while realizing bleeding, improve the rigidity of rotor-support-foundation system.
3, motor adopts direct-connected mode and pump shaft to be connected, and simplifies overall structure, and improves transmission efficiency.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of preposition degassed centrifugal pump of the present invention;
Fig. 2 is the structural representation of reducer pipe of the present invention
Fig. 3 is the structural representation of degassing drum of the present invention;
Fig. 4 is the structural representation of impeller of the present invention;
Fig. 5 is the structural representation of pump shaft of the present invention.
Fig. 6 is the partial enlarged drawing in the degassing drum region of the preposition degassed centrifugal pump shown in Fig. 1.
Wherein: 1, preposition pipe; 2, reducer pipe; 3, intervalve; 4, stuffing box bearing; 5, degassed blade; 6, pump shaft; 7, the impeller plate; 8, export; 9, link press span; 10, turnbuckle; 11, motor; 12, flow deflecting cone; 13, exhaust tube; 14, stiffening rib; 15, reducer; 16, the first screw thread loose joint; 17, isometrical section; 18, the second screw thread loose joint; 19, spiral case; 20, supported flange; 21, motor shaft; 23, support ring; 24, blade; 28, axle sleeve; 29, groove; 31, degassing drum; 32, impeller.
Embodiment
As shown in Figure 1, a kind of preposition degassed centrifugal pump, comprises with entrance and the spiral case 19 of built-in pump shaft 6, also comprises preposition pipe 1, degassing drum 31 and exhaust tube 13.
Preposition pipe 1 is made up of reducer pipe 2 and intervalve 3, by being with the first screw thread loose joint 16 on inclined-plane fixedly to dock between reducer pipe 2 with intervalve 3, by being with the second screw thread loose joint 18 on inclined-plane fixedly to dock between intervalve 3 with described entrance.Reducer pipe 2 adopts screw thread loose joint mode to be communicated with exterior line, and is amplified to consistent with intervalve 3 by reducer 15 by exterior line diameter by caliber, and reducer pipe 2 tapering is 20 ~ 50 degree.
Degassing drum 31 is positioned at intervalve 3, comprises support ring 23, flow deflecting cone 12 and degassed blade 5.Support ring 23 is near pump shaft 6 side and be fixedly connected with impeller 32 wheel hub, and support ring 23 is isometrical with impeller 32 wheel hub.Flow deflecting cone 12 is away from pump shaft 6 side and vertex of a cone centrifugal pump dorsad; Flow deflecting cone 12 drift angle is 30 ~ 60 degree.Degassed blade 5 is connected between support ring 23 and flow deflecting cone 12, and one end is fixed on support ring 23, the other end be fixed on flow deflecting cone 12 outer wall towards centrifugal pump side with isometrical section 17 on.
Exhaust tube 13 is L shape, and one end passes reducer pipe 2, and the other end stretches in degassing drum 31 along flow deflecting cone 12 axis, and flow deflecting cone 12 is rotatably assorted by a pair stuffing box bearing 4 for axle with exhaust tube 13.Stuffing box bearing 4 is water lubriucated bearing, and material is teflon, and bearing play is 0.2 ~ 0.5mm.
Outlet 8 is provided with above spiral case 19.Pump shaft 6 is driven by a motor 11, and spiral case 19 is connected by link press span 9 with motor 11, and motor 11 adopts direct-connected mode transmission.
Impeller 32 comprises the impeller plate 7 fixing with pump shaft 6, and the impeller plate 7 is provided with blade 24 towards degassing drum 31 side.Blade 24 is 0.3 ~ 1mm with the gap of spiral case 19 inwall, and the impeller plate 7 is 0.3 ~ 1mm away from the side of degassing drum 31 and the gap of link press span 9.
As shown in Figure 2, be provided with stiffening rib 14 and fix exhaust tube 13 in reducer pipe 2, the quantity of stiffening rib 14 is 2 ~ 5, gets 3 in the present embodiment.
As shown in Figure 3, degassed blade 5 is circumferentially distributed with polylith, and quantity is 4 ~ 10, gets 8 in the present embodiment.Degassed blade 5 is slab, and width is B.
As shown in Figure 4, blade 24 is open type, and the sheet number of blade 24 is 4 ~ 10, gets 6 in the present embodiment.
As shown in Figure 5, pump shaft 6 one end is an axle sleeve 28, axle sleeve 28 has the groove 29 of 3 axis, and this axle sleeve 28 coordinates in link press span 9 with the motor shaft 21 of motor 11; Axle sleeve 28 is provided with supported flange 20, tightens together with pump shaft 6 at the effect decline motor shaft 21 of turnbuckle 10, and the seal face gradient of supported flange 20 is 5 ~ 15 degree.
As shown in Figure 6, the thickness of degassed blade 5 is h, degassed blade 5 is δ with the gap of preposition pipe 1 inwall, described degassed blade 5 part be between support ring 23 and flow deflecting cone 12 is effective length L, described isometrical section of 17 axial lengths are L1, the internal diameter of described preposition pipe 1 is D, and the internal diameter of described exhaust tube 13 is d.It meets: B=(2 ~ 4) h, h < L1 < 3h, h > δ, D < L < 2D, 0.1D < d < 0.2D.
During preposition degassed centrifugal pump real work of the present invention, the external vacuum pump of exhaust tube 13.Liquid enters intervalve 3 by exterior line through reducer pipe 2.Degassing drum 31 and impeller 32 and pump shaft 6 coaxial linkage, constant velocity rotation under motor 11 drives.Liquid flows to the gap of degassing drum 31 and intervalve 3 inwall under the guiding of flow deflecting cone 12, liquid in rotation under degassed blade 5 drives, and forms the pendular ring of High Rotation Speed, is regulated the thickness of pendular ring by vacuum pump.Under the acting in conjunction of centrifugal pump of the present invention and external vacuum pump, in liquid, free and dissolved gases is separated, and is got rid of by exhaust tube 13.Liquid after degassed then enters in spiral case 19, and the impeller 32 in spiral case 19 drives liquid to rotate, and gives fluid pressure and is discharged by the outlet 8 of spiral case 19.In working procedure, a small amount of liquid leaks into degassing drum 31 from the bearing play of stuffing box bearing 4 inner, radially moves, and incorporates in the pendular ring of High Rotation Speed, do not affect degasifying effect under the effect of rotary centrifugal force.
The foregoing is only the preferred embodiments of the present invention; not thereby scope of patent protection of the present invention is namely limited; the equivalent structure transformation that every utilization specification of the present invention and accompanying drawing content are done; directly or indirectly be used in the technical field that other are relevant, be all in like manner included in protection scope of the present invention.
Claims (10)
1. a preposition degassed centrifugal pump, comprises with entrance and the spiral case of built-in pump shaft, it is characterized in that, also comprise:
Preposition pipe, fixedly docks with described entrance;
Degassing drum, be positioned at preposition pipe and with described pump shaft coaxial linkage;
Exhaust tube, one end extends into the axis position of degassing drum, and the other end passes preposition pipe.
2. preposition degassed centrifugal pump according to claim 1, it is characterized in that, described degassing drum comprises:
Support ring, near pump shaft side and being fixedly connected with centrifugal pump impeller wheel hub;
Flow deflecting cone, away from pump shaft side and vertex of a cone centrifugal pump dorsad;
Degassed blade, to be connected between support ring and flow deflecting cone and to be circumferentially distributed with polylith.
3. preposition degassed centrifugal pump according to claim 2, is characterized in that: described exhaust tube stretches in degassing drum along flow deflecting cone axis, and flow deflecting cone take exhaust tube as axle is rotatably assorted.
4. preposition degassed centrifugal pump according to claim 3, is characterized in that: described exhaust tube is L shape.
5. preposition degassed centrifugal pump according to claim 3, is characterized in that: the internal diameter of preposition pipe is D, and the internal diameter of described exhaust tube is d, meets 0.1D < d < 0.2D.
6. preposition degassed centrifugal pump according to claim 5, it is characterized in that: the described degassed blade part be between support ring and flow deflecting cone is effective length L, the internal diameter of preposition pipe is D, meets D < L < 2D.
7. preposition degassed centrifugal pump according to claim 2, is characterized in that: the two ends of described degassed blade are separately fixed on the outer wall of support ring and flow deflecting cone.
8. preposition degassed centrifugal pump according to claim 7, it is characterized in that: described degassed blade is slab, width is B, the thickness of degassed blade is h, the gap of degassed blade and preposition inner tube wall is 6, meets B=(2 ~ 4) h, h>8.
9. preposition degassed centrifugal pump according to claim 8, is characterized in that: described flow deflecting cone is towards the side of centrifugal pump with isometrical section, and isometrical section of axial length is L1, meets h < L1 < 3h.
10. preposition degassed centrifugal pump according to claim 2, is characterized in that: the quantity of described degassed blade is 4 ~ 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510217659.7A CN104929985A (en) | 2015-04-29 | 2015-04-29 | Preposed degassing centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510217659.7A CN104929985A (en) | 2015-04-29 | 2015-04-29 | Preposed degassing centrifugal pump |
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| CN104929985A true CN104929985A (en) | 2015-09-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510217659.7A Pending CN104929985A (en) | 2015-04-29 | 2015-04-29 | Preposed degassing centrifugal pump |
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| CN (1) | CN104929985A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110134997A (en) * | 2019-04-11 | 2019-08-16 | 北京康得利智能科技有限公司 | Control method, device, storage medium and the electronic equipment of centrifugal degasser |
| CN114307259A (en) * | 2021-12-30 | 2022-04-12 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Pump type oil-gas separator of hydraulic combined transmission generator |
| CN114458623A (en) * | 2021-12-22 | 2022-05-10 | 中国海洋石油集团有限公司 | Centrifugal preposed degassing pump and degassing process flow experimental equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85103948A (en) * | 1984-05-24 | 1987-01-14 | 螺旋体研究有限公司 | Reduce the method and apparatus of gas content in the liquid |
| US4846780A (en) * | 1988-08-10 | 1989-07-11 | Exxon Production Research Company | Centrifuge processor and liquid level control system |
| US5861052A (en) * | 1993-12-23 | 1999-01-19 | Pom Technology Oy Ab | Apparatus and process for pumping and separating a mixture of gas and liquid |
| US20090201975A1 (en) * | 2004-11-17 | 2009-08-13 | Pom Technology Oy Ab | Degassing centrifugal apparatus with sensor |
| CN103423205A (en) * | 2013-08-19 | 2013-12-04 | 浙江大学 | Centrifugal degassing delivery pump |
-
2015
- 2015-04-29 CN CN201510217659.7A patent/CN104929985A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85103948A (en) * | 1984-05-24 | 1987-01-14 | 螺旋体研究有限公司 | Reduce the method and apparatus of gas content in the liquid |
| US4846780A (en) * | 1988-08-10 | 1989-07-11 | Exxon Production Research Company | Centrifuge processor and liquid level control system |
| US5861052A (en) * | 1993-12-23 | 1999-01-19 | Pom Technology Oy Ab | Apparatus and process for pumping and separating a mixture of gas and liquid |
| US20090201975A1 (en) * | 2004-11-17 | 2009-08-13 | Pom Technology Oy Ab | Degassing centrifugal apparatus with sensor |
| CN103423205A (en) * | 2013-08-19 | 2013-12-04 | 浙江大学 | Centrifugal degassing delivery pump |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110134997A (en) * | 2019-04-11 | 2019-08-16 | 北京康得利智能科技有限公司 | Control method, device, storage medium and the electronic equipment of centrifugal degasser |
| CN110134997B (en) * | 2019-04-11 | 2022-12-02 | 北京康得利智能科技有限公司 | Control method and device for centrifugal degasser, storage medium and electronic equipment |
| CN114458623A (en) * | 2021-12-22 | 2022-05-10 | 中国海洋石油集团有限公司 | Centrifugal preposed degassing pump and degassing process flow experimental equipment |
| CN114458623B (en) * | 2021-12-22 | 2023-10-20 | 中国海洋石油集团有限公司 | Centrifugal front-mounted degassing pump and degassing process flow experimental equipment |
| CN114307259A (en) * | 2021-12-30 | 2022-04-12 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Pump type oil-gas separator of hydraulic combined transmission generator |
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Application publication date: 20150923 |