CN102182705A

CN102182705A - High-efficiency rotary shell pump

Info

Publication number: CN102182705A
Application number: CN2009102152953A
Authority: CN
Inventors: 王梦川
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-12-30
Filing date: 2009-12-30
Publication date: 2011-09-14
Anticipated expiration: 2029-12-30
Also published as: CN102182705B

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 rotates in the same way with the rotation pump case in the pump, behind acquisition kinetic energy and the pressure energy, pours static conduction pipe again, 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 conduction pipe inlet, also has partially liq to impact pipeline outer wall outside the conduction pipe inlet and does not export and but be subjected 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 inlet 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 speed rotating output high pressure as far as possible.

The present invention adopts following technological scheme to realize above-mentioned purpose: full of liquid not 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 a laminating the side inwall of pump case periphery, the thickness of rotating liquid layer inlet 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 inlet that can not fully soak the water conservancy diversion device, and water conservancy diversion device ingress and near take to reduce wave stroke that the liquid layer surface produces and form structure and the fit 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 parts such as additional input flow control valve, secondary fluid director, isolating plate to show that rotating liquid layer thickness is whether suitable and to 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 a pump cross-section structure simplified schematic diagram

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

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

Fig. 4 is fluid director end and water conservancy diversion inlet 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 inlet, 11, secondary water conservancy diversion inlet, 12, isolating plate.

Secondary fluid director 5, secondary water conservancy diversion inlet 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 inlet 10.Also can further improve additional one-way valve 7, input flow rate modulating valve 8, secondary water conservancy diversion inlet 11, isolating plate 12.

One end of rotation pump case 2 is fixedlyed 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 stationary fixing perforation outside rotation pump case 2 to go into 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 inlet 10 and secondary water conservancy diversion inlet 11 with the end of secondary fluid director 5 in rotation pump case 2, the hole of water conservancy diversion inlet 10 and secondary water conservancy diversion inlet 11 is consistent with the sense of rotation of liquid in the rotation pump case 2 by the direction that enters outside the hole in the hole, and promptly 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 air and liquid return to enter in the rotation pump case 2 again.When additional isolation plate 12 not, need make secondary water conservancy diversion 11 holes that enter the mouth more approach the shaft axis of pump apart from the shaft axis perpendicular distance position farthest of pump than water conservancy diversion 10 holes that enter the mouth apart from the shaft axis perpendicular distance position farthest of pump, be secondary water conservancy diversion inlet 11 to the longest perpendicular distance of the shaft axis of pump less than the longest perpendicular distance of water conservancy diversion inlet 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 suits of the rotate pump case 2 peripheral side inwalls perpendicular distance to the shaft axis of pump apart from the longest perpendicular distance of the shaft axis of pump.The shaft axis of pump all is meant the shaft center line of pump herein.

Transmission shaft 1 is being with rotation pump case 2 and impeller 9 to rotate synchronously during work. and liquid is entered in the impeller 9 by liquid inlet pipe 3 and flows to the water conservancy diversion zone then with the 2 equidirectional rotations of rotation pump case, start full of liquid in the front pump, liquid in rotation pours in water conservancy diversion inlet 10 and the secondary water conservancy diversion inlet 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 being exported is greater than the input flow rate of liquid inlet pipe 3, make liquid stock minimizing in the pump, small amount of liquid space outside the impeller 9 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 to adopt the unidirectional conducting effect of the magnet fluid sealing bearing of good seal and one-way valve 7 and the area of low pressure that becomes similar vacuum in the pump.Liquid stock reduces to rotating liquid and only soaks the enter the mouth minimum overflow section at 10 holes of full water conservancy diversion in pump, entered the mouth 11 o'clock and can not be dipped into secondary water conservancy diversion, 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 this standard appropriate liquid layer thickness, avoid rotating liquid to soak and impact other static position generation power consumption, reach the standard operation state.

Use behind the input flow rate modulating valve 8 and can under the situation that outside pressure and liquid viscosity change, allow the flow of liquid inlet pipe 3 and fluid director 4 when liquid layer thickness is suitable, equate, and keep the suitable depth of liquid level.Its regulative mode is, continue super thick then secondary fluid director 5 as liquid level in the pump and continue to have liquid output, just represent the flow of the flow of liquid inlet pipe 3, can gradually input flow rate modulating valve 8 flows be turned down greater than fluid director 4, 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 inlet 10 adopts suitable bore also can keep the suitable depth of liquid level when outside pressure and liquid viscosity are stablized.

Can adopt after start, to suspend during additional not secondary fluid director 5 and close liquid inlet pipe 3 inputs, most of liquid in the excavationg pump, 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 then, and it is suitable relatively that the thickness of liquid level is kept.

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

For evoking wave, minimizing can reduce the width of fluid director 4 at liquid level inner peripheral surface place, the enter the mouth overflow section at 10 holes of water conservancy diversion 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 droplet shape, water conservancy diversion enter the mouth 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 by water conservancy diversion 10 holes that enter the mouth from fluid director 4 bodies at the nearest position of the shaft axis of pump, it meets the flow section width less than the enter the mouth Extreme breadth at 10 holes of water conservancy diversion, 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 promptly imitating bow and tilt to cleave the position to the place ahead of meeting stream by reducing to be forced down wave with the angle that the wave stroke direction is become by impact part as far as near and gradually diagonally extending.The stream forward position of meeting of above-mentioned fluid director 4 ends comprises that water conservancy diversion inlet 10 meets the wall edge, hole of stream, and what can also comprise near the water conservancy diversion inlet 10 fluid director 4 meets stream position, forward position.

Also can in rotation pump case 2, add isolating plate 12, make water conservancy diversion inlet 10 and secondary water conservancy diversion inlet 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 has unlimited cavity allows liquid communication, 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 cavity and flow to the enter the mouth side at 11 places of secondary water conservancy diversion, even so allow secondary water conservancy diversion inlet 11 to the longest perpendicular distance of the shaft axis of pump greater than isolating plate 12 cavities to the longest perpendicular distance of the shaft axis of pump and the water conservancy diversion the longest perpendicular distance of 10 holes that enter the mouth 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, be provided with position range at the secondary water conservancy diversion inlet 11 in additional isolation plate 12 backs has just strengthened like this, be provided with the making validity and require to have reduced, secondary water conservancy diversion inlet 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 inlet 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 retaining edge at isolating plate 12 empty edges, retaining is along stretching out isolating plate 12 1 segment distances, retaining along with isolating plate 12 and rotation pump case 2 peripheral side inwalls between not closedly have only local connection of railing type to be convenient to liquid communication, and the retaining edge covers a part with isolating plate 12 cavities.When having only the real excess of liquid stock like this, just may cover the cavity of isolating plate 12, flow to the side that secondary water conservancy diversion inlet 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 secondary fluid director 5 have overflow section position, a place said like this: from then in the overflow section to the longest perpendicular distance of the shaft axis of pump less than the water conservancy diversion the longest perpendicular distance of 10 holes that enter the mouth 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 perpendicular distance, 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 to the shaft axis of pump.Secondary water conservancy diversion inlet 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 10 holes that enter the mouth.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 that has arch, and the hydrops in when rotation work its bending section produces pressure can prevent that air circulation from going in the pump, and effect equals one-way valves 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 that is arranged on that end end face that connects transmission shaft 1.Liquid inlet pipe 3 is advisable to insert in the 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 full of liquid not in working order.When adopting passage circulation bore closed type structure less than normal, but impeller 9 full of liquid in working order forms pressure difference with the water conservancy diversion zone that thin liquid level is only arranged, 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 feature: 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 utilization of instructing input flow rate modulating valve 8.

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 takes place 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 steam bubble at a high speed, 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 the pressure energy in fluid director 4, pressure in the pump case is not high, and the impact amplitude of the limited generation cavitation in space is very little among thin liquid level, and cavitation hazard is little.And outside thin rotating liquid layer, lack the high-pressure area, and be that main region causes liquid to be difficult to that the closely intensive formula of surrounding is finished at the position that is hit to impact with low pressure steam bubble zone.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 speed rotating output high pressure, and suitable output high viscosity liquid.

Claims

1. rotary case pump, the main composition parts comprise: rotation pump case (2), liquid inlet pipe (3), fluid director parts such as (4), stationary fixing and in cavity arranged fluid director (4) go into 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 inlet (10), it is characterized in that: fluid director (4) is connected on water conservancy diversion inlet (10) hole and meets the flow section width less than the enter the mouth Extreme breadth at (10) hole of water conservancy diversion from the body at the near end place of the shaft axis of pump.

2. rotary case pump according to claim 1, it is characterized in that: described rotary case pump also is provided with inner with the outside space of secondary fluid director (5) perforation rotation pump case (2), water conservancy diversion output liquid when secondary fluid director (a 5) rotating liquid layer thickness in water conservancy diversion inlet (10) working zone is above standard suitable depth.

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

4. rotary case pump according to claim 2 is characterized in that: described secondary fluid director (5) is to turn on the apocenosis passage of the housing of rotation pump case (2) with rotation pump case (2) rotation.

5. according to claim 1 or 3 or 4 described rotary case pumps, it is characterized in that: described secondary water conservancy diversion inlet (11) and water conservancy diversion inlet (10) are distributed in the both sides of isolating plate (12) respectively, and isolating plate (12) has the cavity of opening wide circulation.

6. rotary case pump according to claim 5 is: the empty edge of described isolating plate (12) is provided with wave resistance retaining edge, and is not closed between retaining edge and the isolating plate (12), and retaining is along isolating plate (12) cavity being covered a part.

7. rotary case pump according to claim 1 is: 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 near and gradually diagonally extending to the place ahead of meeting stream.

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

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

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