CN102182705B

CN102182705B - High-efficiency rotary shell pump

Info

Publication number: CN102182705B
Application number: CN 200910215295
Authority: CN
Inventors: 王梦川
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-12-30
Filing date: 2009-12-30
Publication date: 2013-03-06
Anticipated expiration: 2029-12-30
Also published as: CN102182705A

Abstract

The invention belongs to the technical field of rotary shell pumps. The rotary shell pump comprises a transmission shaft, a rotary pump shell, an impeller wheel, a liquid inlet tube, a fluid director, an auxiliary fluid director, a flow regulating valve, a one-way valve, a rotary motive seal, an isolation plate, and the like. Liquid with a suitable amount is stably stored in the pump in a flow balance manner; the liquid in the suitable amount rotates to form a liquid layer attached to the side inner wall of the circumference of the pump shell, and the liquid layer is stable in thickness and only submerges the hole opening of a fluid director inlet without submerging and impacting other static components; at the inlet and the adjacent part of the flow director, the ineffective friction between the rotating liquid and the guide device are reduced as much as possible by use of an appearance structure and a mounting manner which can reduce wave impact on the surface of the liquid layer and decrease the wave making resistance. The pump is suitable for high-speed rotation high-efficiency output of high-pressure liquid and suitable for conveying of high-viscosity liquid.

Description

High-efficiency spiral shell pump

Technical field: the invention belongs to the rotary case pump field.

Background technique: the working method of rotary case pump is that liquid behind acquisition kinetic energy and the pressure energy, pours static conduction pipe with rotation pump case rotating Vortex again in the pump, externally exports acting along conduction pipe.This mode has been avoided the invalid friction of pump case and liquid, but exportable except the liquid that pours the conduction pipe entrance, also has partially liq to impact pipeline outer wall outside the conduction pipe entrance and does not export and but be subject to resistance and cause power consumption.And along with the raising of rotational speed, this power consumption aggravation can make pump efficiency sharply reduce.

Summary of the invention:

The present invention seeks to: a kind of invalid friction of not only avoiding between pump case and liquid is provided, and avoid rotating liquid to impact remaining part outside the entrance of conduction pipe as far as possible, subdue the invalid friction of rotating liquid and water conservancy diversion device, high efficiency and can adapt to the rotary case pump of High Rotation Speed output high pressure as far as possible.

The present invention adopts following technological scheme to realize above-mentioned purpose: be not full of liquid during pump case inherent standard working state, but utilize equilibrium relation between input and the output flow only to make in the pump case stable maintenance an amount of liquid stock, the appropriate amount of fluid rotation forms the tubular liquid level that one deck is pasting the side inwall of pump case periphery, the thickness of rotating liquid layer entrance stable and the lucky submergence water conservancy diversion of rotating liquid device the position of effectively circulating, avoid the blocked up immersion of liquid layer to impact other how static position, also avoid liquid layer to cross the thin entrance that can not fully soak the water conservancy diversion device, and water conservancy diversion device ingress and near take to reduce the wave stroke that the liquid layer surface produces and form structure and the assembling mode that reduces wave-making resistance, thereby the invalid friction of as far as possible subduing rotating liquid and water conservancy diversion device.This pump also can further improve the parts such as additional input flow control valve, secondary fluid director, isolating plate to show that rotating liquid layer thickness is whether suitable and assist to regulate an amount of liquid stock in the holding pump, makes rotating liquid layer thickness more precise and stable suitable.

Description of drawings: Fig. 1 is pump cross-section structure simplified schematic diagram

Fig. 2 is fluid director end and water conservancy diversion entrance schematic perspective view

Fig. 3 is fluid director end and water conservancy diversion entrance plan view

Fig. 4 is fluid director end and water conservancy diversion entrance sectional side view

Among the figure: 1, transmission shaft, 2, the rotation pump case, 3, liquid inlet pipe, 4, fluid director, 5, secondary fluid director, 6, rotary dynamic seal, 7, one-way valve, 8, the input flow rate modulating valve, 9, impeller, 10, the water conservancy diversion entrance, 11, secondary water conservancy diversion entrance, 12, isolating plate.

Secondary fluid director 5, secondary water conservancy diversion entrance 11 respectively are painted with two kinds of structural types among Fig. 1, can choose wantonly and adopt one of them, also can all adopt.

Embodiment:

This rotary case pump critical piece comprises: transmission shaft 1, rotation pump case 2, liquid inlet pipe 3, fluid director 4, secondary fluid director 5, rotary dynamic seal 6, impeller 9, water conservancy diversion entrance 10.Also can further improve additional one-way valve 7, input flow rate modulating valve 8, secondary water conservancy diversion entrance 11, isolating plate 12.

One end of rotation pump case 2 is fixedly connected with transmission shaft 1, is provided with impeller 9 in the rotation pump case 2.Liquid inlet pipe 3, fluid director 4, secondary fluid director 5 all can adopt static fixing from the 2 outer perforations of rotation pump case to enter to rotate the pipeline configuration of pump case 2 inside.The rotary dynamic seal 6 that connects static part and rotary component should adopt the magnet fluid sealing bearing of good seal.Liquid inlet pipe 3 is provided with input flow rate modulating valve 8.

Fluid director 4 is respectively arranged with water conservancy diversion entrance 10 and secondary water conservancy diversion entrance 11 with the end of secondary fluid director 5 in rotation pump case 2, the hole of water conservancy diversion entrance 10 and secondary water conservancy diversion entrance 11 is consistent with the sense of rotation of rotation pump case 2 interior liquid by the direction that enters outside the hole in the hole, and namely the hole is in face of the liquid in rotation direction.Secondary fluid director 5 also is provided with one-way valve 7, and outwards output liquid can stop again air and liquid backflow to enter in the rotation pump case 2.When additional isolation plate 12 not, need to make secondary water conservancy diversion entrance 11 holes apart from the shaft axis perpendicular distance position farthest of pump than water conservancy diversion entrance 10 holes apart from the shaft axis perpendicular distance position farthest of pump the shaft axis closer to pump, be secondary water conservancy diversion entrance 11 to the longest perpendicular distance of the shaft axis of pump less than the longest perpendicular distance of water conservancy diversion entrance 10 to the shaft axis of pump, and the hole of secondary flow-guiding mouth 11 equals pasting the inner peripheral surface of rotating liquid layer when the standard operation state thickness is suitable of rotating pump case 2 peripheral side inwalls to the perpendicular distance of the shaft axis of pump apart from the longest perpendicular distance of the shaft axis of pump.The shaft axis of pump all refers to the shaft center line of pump herein.

Transmission shaft 1 is with rotation pump case 2 and impeller 9 synchronous rotaries during work. and liquid is entered in the impeller 9 by liquid inlet pipe 3 and then flows to the water conservancy diversion zone with the 2 equidirectional rotations of rotation pump case, start in the front pump and be full of liquid, liquid in rotation pours in water conservancy diversion entrance 10 and the secondary water conservancy diversion entrance 11, outside fluid director 4 and secondary fluid director 5 inner cavity water conservancy diversion rear pumps.So fluid director 4 and secondary fluid director 5 common outwards output liquids when just starting, and fluid director 4 equates with liquid inlet pipe 3 flows under the standard operation state, at this moment the flow of exporting is greater than the input flow rate of liquid inlet pipe 3, make liquid stock minimizing in the pump, a small amount of liquid space impeller 9 outside in pump forms the tubular liquid level that a laminating the side inwall of rotation pump case 2 peripheries because of rotation, and the outer remaining space of liquid level is then because rotary dynamic seal 6 is one-way conduction effects of the magnet fluid sealing bearing of employing good seal and one-way valve 7 and become the area of low pressure of similar vacuum in the pump.Liquid stock reduces to the minimum overflow section that rotating liquid only soaks full water conservancy diversion entrance 10 holes in pump, and can not be dipped into secondary water conservancy diversion entrance 11 time, secondary fluid director 5 stops the water conservancy diversion output liquid, and at this moment liquid inlet pipe 3 equates with fluid director 4 flows, just can when working on, keep the suitable liquid layer thickness of this standard, avoid rotating liquid to soak and impact other static position generation power consumption, reach the standard operation state.

Can allow the flow of liquid inlet pipe 3 and fluid director 4 when liquid layer thickness is suitable, equate in the situation that outside pressure and liquid viscosity change after using input flow rate modulating valve 8, and keep the suitable depth of liquid level.Its regulative mode is, continue super thick then secondary fluid director 5 such as liquid level in the pump and continue to have liquid output, just represent the flow of liquid inlet pipe 3 greater than the flow of fluid director 4, can gradually input flow rate modulating valve 8 flows be turned down, when secondary fluid director 5 has just stopped exporting, just represent adjusted putting in place.Not during additional input flow control valve 8, as long as water conservancy diversion entrance 10 adopts suitable bore also can keep the suitable depth of liquid level when outside pressure and liquid viscosity are stablized.

Can adopt when not adding secondary fluid director 5 after start, to suspend and close liquid inlet pipe 3 inputs, most of liquid in the excavationg pump, then liquid inlet pipe 3 reinfusate bodies and flow are slightly less than the output design discharge of fluid director 4 when the suitable liquid layer thickness of standard, the thickness of liquid level are kept relatively suitable.

The wall edge, hole of water conservancy diversion entrance 10 is the sharp knife edges shape, can reduce fluid resistance, and fluid director 4 interior water conservancy diversion cavitys adopt the design of gradual change section area and shape, can reduce the fluid friction power in the fluid director 4.

For evoking wave, minimizing can reduce fluid director 4 at the width at liquid level inner peripheral surface place, the overflow section at water conservancy diversion entrance 10 holes is to have a distal process to go out and shape that an outstanding end width reduces gradually, suitable with being shaped as of water-drop-shaped, water conservancy diversion entrance 10 holes from the nearest position of the shaft axis of pump just in its outstanding end.Flat for reducing to meet the flow section thin form from fluid director 4 bodies at the nearest position of the shaft axis of pump by water conservancy diversion entrance 10 holes, it meets the flow section width less than the Extreme breadth at water conservancy diversion entrance 10 holes, the area of its side is met the top of stream and the area of tail end much larger than it, and is streamlined or is added with the cowling that can reduce fluid resistance meeting flow path direction.For forcing down the thickness that rises wave, fluid director 4 ends meet the stream forward position along with the distance of the shaft axis of distance pump from as far as closely and gradually tilting to extend to the place ahead of meeting stream, namely imitate bow and tilt to cleave the position by reducing to be forced down wave by impact part with the angle that the wave stroke direction is become.The stream forward position of meeting of above-mentioned fluid director 4 ends comprises that water conservancy diversion entrance 10 meets the wall edge, hole of stream, and what can also comprise near the water conservancy diversion entrance 10 fluid director 4 meets stream position, forward position.

Also can be at rotation pump case 2 interior additional isolating plates 12, make water conservancy diversion entrance 10 and secondary water conservancy diversion entrance 11 respectively in the both sides of isolating plate 12, the circumferential edges of isolating plate 12 is connected closed with rotation pump case 2 peripheral side inwalls, isolating plate 12 allows liquid communication with the cavity of opening wide, the standard suitable depth of liquid level when its cavity equals the cross section Internal standard working state of its residing pump apart from beelines of rotation pump case 2 peripheral side inwalls, only liquid level super when thick liquid just cover the side that the cavity flows to secondary water conservancy diversion entrance 11 places, even so allow secondary water conservancy diversion entrance 11 to the longest perpendicular distance of the shaft axis of pump greater than the longest perpendicular distance of isolating plate 12 cavities to the longest perpendicular distance of the shaft axis of pump and water conservancy diversion entrance 10 holes to the shaft axis of pump, also can only the water conservancy diversion liquid level super excess liq when thick of secondary fluid director 5, but the setting position scope at additional isolation plate 12 rear secondary water conservancy diversion entrances 11 has just strengthened like this, arrange with the making validity and require to have reduced, secondary water conservancy diversion entrance 11 can be tried one's best and do not contacted near rotation pump case 2 peripheral side inwalls during practical application, obtains high as far as possible water conservancy diversion effect.Water conservancy diversion entrance 10 mistake that swashes the foam of breaking waves in the part was spattered isolating plate 12 cavities when preventing that liquid is an amount of, can add wave resistance gear edge at isolating plate 12 empty edges, gear is along stretching out isolating plate 12 1 segment distances, gear along with isolating plate 12 and rotation pump case 2 peripheral side inwalls between not closedly only have local connection of railing type to be convenient to liquid communication, and the gear edge covers a part with isolating plate 12 cavities.When only having so the real excess of liquid stock, just may cover the cavity of isolating plate 12, flow to the side that secondary water conservancy diversion entrance 11 is installed and exported by secondary fluid director 5 water conservancy diversion.

Obviously aforementioned auxiliary fluid director 5 also can be used instead to connect with the mode of structure of the apocenosis passage of rotation pump case 2 rotations at the housing of rotation pump case 2 and replace, as long as apocenosis passage is only at the super excess liq of discharging timely and effectively when thick of liquid level.When additional isolation plate 12 not, then need so secondary fluid director 5 have overflow section position, a place said: from then in the overflow section to the longest perpendicular distance of the shaft axis of pump less than the longest perpendicular distance of water conservancy diversion entrance 10 holes to the shaft axis of pump, equal pasting the inner peripheral surface of liquid level when standard thickness of rotating pump case 2 peripheral side inwalls to the perpendicular distance of the shaft axis of pump, and be less than or equal in secondary fluid director 5 all the other all overflow sections to the longest perpendicular distance of the shaft axis of pump.Secondary water conservancy diversion entrance 11 to the longest perpendicular distance of the shaft axis of pump is not less than is pasting inner peripheral surface to the perpendicular distance of the shaft axis of pump of liquid level when standard thickness of rotating pump case 2 peripheral side inwalls and is being advisable, can be longer apart from the longest perpendicular distance of shaft axis of pump than water conservancy diversion entrance 10 holes.Behind additional isolation plate 12, then need secondary fluid director 5 have overflow section position, a place said: from then on overflow section in to the longest perpendicular distance of the shaft axis of pump more than or equal to the longest perpendicular distance of isolating plate 12 cavities to the shaft axis of pump, and be less than or equal to the longest perpendicular distance of the interior shaft axis to pump of secondary fluid director 5 all the other all overflow sections.Apocenosis passage should adopt the crooked pipeline with arch, and the hydrops during the work rotation in its bending section produces pressure can prevent that air return from entering in the pump, and effect equals one-way valve 7 to secondary fluid director 5 to be installed.

Impeller 9 can be arranged at rotation pump case 2 any end faces in this pump, this paper accompanying drawing only is painted with the form of that end end face that is arranged on connection for transmission axle 1.Liquid inlet pipe 3 is to be advisable in the access impeller 9.Impeller 9 can adopt open architecture also can adopt in the middle of a part of partial closure and all the other positions half-closed structure of opening wide, also can adopt and pump between the water conservancy diversion working zone only with the closed type structure of passage circulation.When adopting open architecture, half-closed structure and passage bore closed type structure bigger than normal, impeller 9 is not full of liquid in working order.When adopting passage circulation bore closed type structure less than normal, it is poor with the water conservancy diversion zone mineralization pressure that thin liquid level is only arranged that impeller 9 can be full of liquid in working order, liquid can wash away the local generation of pump case and cause some friction power losses, but the eroding velocity that can utilize pressure difference to cause improves liquid in rotation speed, thereby improves delivery pressure.Also input flow rate modulating valve 8 can be changed the passage that is arranged at impeller 9 and is not arranged at liquid inlet pipe 3 when adopting closed type structure.

This pump also can add following characteristics: this pump also can adopt electronic component sensor monitoring liquid layer thickness, also can adopt transparent pump case directly to represent liquid layer thickness, and cooperates the adjusting of instructing input flow rate modulating valve 8 to use.

Though there are a large amount of areas of low pressure that unique anti-cavitation function is but arranged during this pump work.Usually the essential condition that occurs of cavitation is not stop production in the pump to give birth to temporary transient low pressure steam bubble zone and mix mutually with the highly pressurised liquid zone, when the liquid of high-pressure area is clamp-oned when filling up steam bubble the impact of generation explosion type tool collapsing force fast.Especially be attached to device surface at steam bubble, steam bubble is filled up squeeze when going out when highly pressurised liquid pours at a high speed steam bubble, device was originally produced severe impact by the steam bubble covering part, and by around the impact site entirely by high pressure and can gather at a high speed the liquid that comes and retrain, make flexible hydraulic shock also be difficult to spread apart to the periphery area of influence, impact energy very the concentrated area to being caused damage by the position, center of impact.Most of regional thin rotating liquid layer that only has in pump during this pump work, mainly be that the liquid transport of kinetic energy is converted into pressure energy in fluid director 4, pressure in the pump case is not high, and the impact amplitude of limited space generation cavitation is very little among thin liquid level, and cavitation hazard is little.And outside thin rotating liquid layer, lack the high-pressure area, and cause liquid to be difficult to that the closely intensive formula of surrounding is finished at the position that is hit take low pressure steam bubble zone as main region to impact.Only there is thin liquid level to make pump case be subjected to centrifugal force less and can adopt the comparatively design of light and thin type during work in the pump, is convenient to make and economical with materials.This pump has been subdued the invalid friction of water conservancy diversion device and liquid and has been raised the efficiency, and can adapt to High Rotation Speed output high pressure, and suitable output high viscosity liquid.

Claims

1. rotary case pump, critical piece comprises rotation pump case (2), liquid inlet pipe (3), fluid director (4), secondary fluid director (5), isolating plate (12), static fixing and in have the fluid director (4) of cavity to enter to rotate in the pump case (2) from the outer perforation of rotation pump case (2), the end of fluid director (4) in rotation pump case (2) is provided with water conservancy diversion entrance (10), fluid director (4) be connected on the end place of water conservancy diversion entrance (10) hole close to the shaft axis of pump body meet the flow section width less than the Extreme breadth at water conservancy diversion entrance (10) hole, the end of secondary fluid director (5) in rotation pump case (2) is provided with secondary water conservancy diversion entrance (11), secondary fluid director (5) connects inner with the outside space of rotation pump case (2), it is characterized in that: isolating plate (12) is arranged in the rotation pump case (2), one side of isolating plate (12) is distributed with described water conservancy diversion entrance (10), the opposite side of isolating plate (12) is distributed with described secondary water conservancy diversion entrance (11), isolating plate (12) is with the cavity of opening wide circulation, the liquid of the residing side of water conservancy diversion entrance (10) is only in the situation that surpass the opposite side that suitable depth just can flow to by the cavity of isolating plate (12) isolating plate (12) during work, secondary fluid director (5) only in the situation that in the pump liquid stock surpass the storage output liquid that suits.

2. rotary case pump according to claim 1 is characterized in that: described secondary fluid director (5) fixed static, and described secondary water conservancy diversion entrance (11) hole on secondary fluid director (5) top is in face of the liquid in rotation direction.

3. rotary case pump according to claim 1 is characterized in that: described secondary fluid director (5) is to connect rotation pump case (2) housing and with the apocenosis passage of rotation pump case (2) rotation.

4. rotary case pump according to claim 1 is characterized in that: the empty edge of described isolating plate (12) is provided with wave resistance gear edge, gear along and isolating plate (12) between not closed, and gear is along isolating plate (12) cavity being covered a part.

5. rotary case pump according to claim 1 is characterized in that: described fluid director (4) end meet the stream forward position along with its apart from the distance of the shaft axis of pump from as far as closely and gradually tilting to extend to the place ahead of meeting stream.

6. rotary case pump according to claim 1, it is characterized in that: the overflow section at described water conservancy diversion entrance (10) hole is to have a distal process to go out and shape that an outstanding end width reduces gradually, water conservancy diversion entrance (10) from the nearest position of the shaft axis of pump just in its end of giving prominence to.

7. rotary case pump according to claim 1, it is characterized in that: described rotation pump case (2) has adopted transparent material.

8. rotary case pump according to claim 1, it is characterized in that: described rotary case pump is provided with input flow rate modulating valve (8).