CN205806036U - A kind of anti-cavitation Pulp pump - Google Patents
A kind of anti-cavitation Pulp pump Download PDFInfo
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- CN205806036U CN205806036U CN201620721285.2U CN201620721285U CN205806036U CN 205806036 U CN205806036 U CN 205806036U CN 201620721285 U CN201620721285 U CN 201620721285U CN 205806036 U CN205806036 U CN 205806036U
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- impeller
- cavitation
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- pump
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Abstract
The utility model discloses a kind of anti-cavitation Pulp pump, including the pump housing, the described pump housing is provided with suction inlet and discharge opening, it is provided with impeller in the described pump housing, described impeller is provided with primary blades and inducer blade, described inducer blade extends in suction inlet, and described primary blades and inducer blade connect；The area of section of described suction inlet is 3 10 times of described discharge opening area of section.The purpose of this utility model is to provide a kind of anti-cavitation, can carry high concentration two phase flow or the Pulp pump of high vapor content three-phase flow.
Description
Technical field
This utility model relates to rotary motive power pumping unit field, a kind of centrifugal pump carrying abrasive media.
Background technology
In the industry such as ore dressing and smelting, often carrying some solid-liquid two-phase flows having abrasion with centrifugal pump, this is often
Select Pulp pump.Common Pulp pump commonly uses the antifriction alloy manufactures such as Cr26, Cr15Mo3, at the solid-liquid carrying some low concentrations
During two phase flow medium, can normally use, but conveying high concentration particularly solid-liquid two-phase flow reach 55% containing solid weight
Time above, common Pulp pump just manifests problems with: 1, wear problem highlights, and the life-span Chang Buneng of flow passage part meets use to be wanted
Ask.2, anti-cavitation performance is poor, and this is due to increasing along with two phase flow concentration, and the mobility of medium constantly declines, net positive suction head
Much smaller than clear water, causing the flow of pump occurring as soon as cavitation phenomenons much smaller than calibration value, not only flow passage part is easily damaged, the property of pump
All can be decreased obviously such as efficiency, lift, flow etc..
At ore dressing and smelting industry, also frequently require centrifugal pump and carry some three-phase flow media containing solid, liquid, vapour,
The common foam being ore dressing flotation operation and producing.If vapor content is less in medium, and the persistence of foam is short, and (i.e. foam can be
Relatively short period of time implosion), select common Pulp pump can also meet technological requirement, if but in medium vapor content higher, and
The persistence of foam is long, selects common slurry stock pump generally cannot meet technological requirement.Modal phenomenon is the flow of pump, raises
Journey and efficiency are far below operating mode when design load and conveying clear water.Its reason is: a large amount of steam bubbles contained in medium, is entering leaf
Constantly can expand due to the pressure subatmospheric in medium before wheel suction inlet, closer to suction eye, steam bubble expands
Must be the biggest, make pump just create cavitation phenomenons when flow is far below design discharge, thus cause the flow of pump, lift and efficiency
Being substantially less than design load, simultaneously because the generation of cavitation phenomenons, honeycomb can be produced in the antifriction alloy flow passage part surface of common Pulp pump
The cavitation hole of shape, and cause flow passage part initial failure.
Therefore, the problems referred to above to be solved, it is necessary to set about in terms of two, the first uses the material of anti-cavitation to manufacture stream
Part, this is because in above-mentioned operating mode, cavitation phenomenons is inevitable, it is necessary to use the material guarantee pump that anti-cavitation performance is good
Life-span.It two is to improve pump structure, reduces the negative pressure of suction eye, so that the cavitation phenomenons that pump is when design discharge
Still in mild state, it is unlikely to cause being decreased obviously of flow, lift and efficiency.
Application number 201520743981.9 discloses the technical scheme that this utility model people proposes, the party for the problems referred to above
Case uses composite abrasion resistance material to manufacture the Wet Parts of slurry pump anti-cavitation problem with solution material, arranges one on main shaft simultaneously
Centrifugal impeller and axial wheel are to improve net positive suction head.Practice have shown that, this technical scheme can preferably solve common Pulp pump
The problems referred to above；But the deficiency of this technical scheme comes out the most in practice, first production cost is higher, causes the competing of product
Power of striving declines；It two is that two impellers use the mode being threaded togather so that the dynamic and static balance of impeller and the rotation of screw thread
Tight position is relevant (will two impellers be tightened onto after combined impeller carried out balance by certain position, if being further continued for screwing combination
During the connection screw thread of impeller, balance will be destroyed), in technique, dynamic balancing or the static balance difficulty of rotor to be realized are very big, its
Three is that the axial dimension of rotor portion is big, is easily generated dynamic balancing and destroys, and further result in the parts such as bearing and main shaft after abrasion
Damage.
Utility model content
The purpose of this utility model is to provide a kind of anti-cavitation, can carry high concentration two phase flow or high vapor content three-phase flow
Pulp pump.
The technical solution of the utility model is: include that the pump housing, the described pump housing are provided with suction inlet and discharge opening, described
Impeller it is provided with in the pump housing, it is characterised in that: described impeller is provided with primary blades and inducer blade, and described inducer blade extends
In suction inlet, described primary blades and inducer blade connect；The area of section of described suction inlet is face, described discharge opening cross section
Long-pending 3-10 times.
In above-mentioned anti-cavitation Pulp pump, described primary blades is centrifugeblade or mixed flow blade, and inducer blade is axial flow
Blade.
In above-mentioned anti-cavitation Pulp pump, the described pump housing includes procapsid and back casing, described procapsid inwall
Being provided with front liner, described back casing inwall is provided with rear inner lining, and described front liner and rear inner lining surround for accommodating impeller
Fluid chamber and described discharge opening；Described impeller and described front liner, described rear inner lining are made up of composite abrasion resistance material.
In above-mentioned anti-cavitation Pulp pump, between described rear inner lining and back casing, it is provided with rear inner lining skeleton；Described
Be provided with between front liner and rear inner lining sealing gasket, described rear inner lining and rear inner lining skeleton by bonding agent be bonded into one whole
Body.
In above-mentioned anti-cavitation Pulp pump, also include the main shaft being connected after back casing and rear inner lining, institute with impeller
The main shaft stated is provided with accessory impeller, is provided with the decompression lid being connected with back casing and is arranged on master between described main shaft and back casing
The filler of axle periphery, described decompression lid and packing seal connect；Described decompression lid, rear inner lining skeleton, rear inner lining surround one
Individual receiving chamber, described accessory impeller is positioned at this receiving intracavity.
In above-mentioned anti-cavitation Pulp pump, described impeller is enclosed impeller, described impeller include back shroud and
Ring-type front shroud, described primary blades is arranged between front shroud and back shroud, and described inducer blade is arranged on front shroud
Circular hollow portion in, described primary blades and inducer blade are connected by smooth transition region.
In above-mentioned anti-cavitation Pulp pump, described impeller is half-opened impeller, and described impeller includes back shroud, institute
The primary blades stated is arranged on back shroud and is connected with inducer blade by a smooth transition region.
In above-mentioned anti-cavitation Pulp pump, described impeller is made up of composite abrasion resistance material；Set in described back shroud
There is the impeller framework of metal material.
In above-mentioned anti-cavitation Pulp pump, described composite abrasion resistance material includes abrasion resistant particles and the 14-of 80-85wt%
The resin of 18wt%.
In above-mentioned anti-cavitation Pulp pump, described impeller framework includes connecting portion and is arranged on connecting portion periphery
Disc structure, described disc structure is provided with multiple receiving recess for composite abrasion resistance material.
The beneficial effects of the utility model are as follows:
Scheme of the present utility model arranges the structure of inducer blade in primary blades, can be regarded as by impeller by two leaves
Wheel combines, if primary blades is centrifugeblade or mixed flow blade, inducer blade is axial blade, can significantly improve pump
Net positive suction head, or reduce cavitation intensity.
General Pulp pump suction inlet sectional area is about 1.5-2.5 times of discharge opening sectional area, so can obtain higher
Clear water efficiency, the sectional area of suction chamber is set to by this utility model 3-10 times of discharge opening sectional area, though pump can be caused
Clear water efficiency declined, but NPSH can be effectively improved, it is to avoid pump runs under the operating mode of serious cavitation, from
And make pump its efficiency when carrying underflow or foam be higher than common Pulp pump.Another object is that as inducer blade of increase suction inlet
Lay and provide enough space, to improve net positive suction head further.It is discharge opening sectional area 3-10 by suction inlet sectional area
Arranging and the inducer blade cooperation of centrifugal primary blades and axial-flow type again, can improve NPSH greatly,
Make the anti-cavitation excellent effect of this Pulp pump.
Front liner, rear inner lining and impeller use complex abrasion-proof material to manufacture, and can significantly improve the wearability of pump and anti-vapour
Erosion performance, research shows, composite abrasion resistance material not only wearability is significantly stronger than antifriction alloy, and the advantage of its cavitation-resistance is the most prominent
Going out, its reason is that nonmetallic materials are insensitive to cavitation damage.
By the pump housing after A A plane is divided into two parts, front liner and rear inner lining shape after can from the A A plane demoulding,
When A A plane is arranged in position, rational demoulding tapering can be formed, it is easy to the demoulding, be conducive to extending front pump
Body, the life-span of rear mould for pump body.
The procapsid of metal material, back casing and impeller framework are set, it is ensured that the pump housing and the intensity of impeller, at fore shell
The bolt that body and back casing outer are arranged, can compress the sealing gasket that A A plane is arranged, prevent seepage.
Accompanying drawing explanation
Fig. 1 is the sectional view of embodiment 1；
Fig. 2 is the sectional view of the pump housing of embodiment 1；
Fig. 3 is the front view of embodiment 1；
Fig. 4 is the schematic diagram of the procapsid of embodiment 1；
Fig. 5 is the front view of the impeller of embodiment 1；
Fig. 6 is the sectional view of the impeller of embodiment 1；
Fig. 7 is the sectional view of embodiment 2；
Fig. 8 is the three-dimensional view of the impeller of embodiment 2；
Fig. 9 is the front view of the impeller of embodiment 2；
Figure 10 is the sectional view of the impeller of embodiment 2；
Figure 11 is the axonometric chart of the impeller framework of embodiment 1；
Figure 12 is the axonometric chart of the impeller framework of embodiment 2.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the technical solution of the utility model is described in further detail, but not structure
Paired any restriction of the present utility model.
Embodiment 1
As shown in Fig. 1-6 and Figure 11, a kind of anti-cavitation Pulp pump, including the pump housing 1, the described pump housing 1 is provided with suction
Mouth 2 and discharge opening 3, be provided with impeller 4 in the described pump housing 1, described impeller 4 is provided with centrifugal primary blades 5 and axial-flow type
Inducer blade 6, described inducer blade 6 extends to the position of suction inlet 2, and described primary blades 5 and inducer blade 6 connect.
Preferably, inducer blade 6 and primary blades 5 are 4, certainly in production application, it is also possible to be respectively provided with 3 according to the condition of production
Sheet or 5 inducer blades 6 and primary blades 5.
In actual applications, centrifugal primary blades 5 and the inducer blade 6 of axial-flow type can effectively improve the cavitation of pump
Surplus, or reduce the intensity of cavitation.
In order to improve NPSH further, the area of section of described suction inlet 2 is described discharge opening 3 area of section
3-10 times.In the present embodiment, the cross section of discharge opening 3 is circular, a diameter of 100mm, a diameter of 250mm of suction inlet 2, sucks
Area of section is leaf discharge area 6.25 times of mouth 2, though the clear water efficiency of pump can be caused to have declined, but can effectively carry
High NPSH, it is to avoid pump runs under the operating mode of serious cavitation, so that pump its efficiency when carrying underflow or foam
Higher than common Pulp pump.Increase another object is that of suction inlet 2 and provide enough space for laying of inducer blade 6, to enter
Step improves net positive suction head.It is that discharge opening 3 sectional area is arranged and centrifugal primary blades 5 and axial flow by suction inlet 2 sectional area
The inducer blade 6 of formula coordinates, and can improve NPSH greatly, makes the anti-cavitation excellent effect of this Pulp pump.
For specifically, the described pump housing 1 includes that procapsid 11 and back casing 12, described procapsid 11 inwall are provided with
Front liner 13, described back casing 12 inwall is provided with rear inner lining 14, is connected by bonding agent between procapsid 11 and front liner 13
Becoming an entirety, to improve its mechanical strength, described front liner 13 and rear inner lining 14 surround the fluid cavity for accommodating impeller 4
Room 17, is provided with rear inner lining skeleton 15, rear inner lining skeleton and rear inner lining by bonding between described rear inner lining 14 and back casing 12
Agent is combined into an entirety, such that it is able to improve the mechanical strength of rear inner lining, prevents rear inner lining from damaging when assembly or disassembly；Institute
It is provided with sealing gasket 16 between front liner 13 and the rear inner lining 14 stated.At the bolt that procapsid 11 and back casing 12 outer are arranged, can
It is arranged on the sealing gasket 16 between front liner 13 and rear inner lining 14 to compress, prevents seepage.Sealing gasket 16 is quality of rubber materials, thickness
For 1mm, the thinnest if sealing gasket 16 easily there is seepage, the thickest if sealing gasket 16 be easily worn.
In the present embodiment, the main shaft 7 being connected after back casing 12 and rear inner lining 14 is also included with impeller 4, on main shaft 7
Being provided with bearing assembly 71, described main shaft 7 is provided with accessory impeller 8, is provided with and back casing between described main shaft 7 and back casing 12
The decompression lid 9 that 12 connect and the filler 10 being arranged on main shaft 7 periphery, described decompression lid 9 and filler 10 are tightly connected；Described
Decompression lid 9, rear inner lining skeleton 15, rear inner lining 14 surround one and accommodate chamber, and described accessory impeller 8 is positioned at this receiving intracavity.Accessory lobes
Taking turns the effect that can improve sealing that arranges of 8, certainly, in some embodiments, using machine mechanical seal to substitute accessory impeller can
To obtain same effect.
Further preferred as the present embodiment, described impeller 4 is enclosed impeller, and described impeller 4 includes bonnet
Plate 41 and ring-type front shroud 42, described primary blades 5 is arranged between front shroud 42 and back shroud 41, described inducer blade
6 are arranged in the circular hollow portion of front shroud 42, and described primary blades 5 and inducer blade 6 are connected by smooth transition region 51.
Further, in order to improve efficiency and the lift of pump, front shroud 42 is provided with the first back blades 43；For
Improve the effect that main shaft 7 seals, prevent medium from revealing at sealing, back shroud 41 is provided with the second back blades
44。
In order to improve anti-cavitation effect, described impeller 4 is made up of composite abrasion resistance material；It is provided with in described back shroud 41
The impeller framework 45 of carbon steel material；Described front liner 13 and rear inner lining 14 are made up of composite abrasion resistance material, and described is compound resistance to
Mill material includes the carborundum of 80wt% and the phenolic resin of 17wt%.
Tracing it to its cause and be, composite abrasion resistance material not only wearability is significantly stronger than antifriction alloy, the advantage of its cavitation-resistance
The most prominent, nonmetallic materials are insensitive to cavitation damage.
In order to improve impeller semi-finals degree, described impeller framework 45 includes connecting portion 46 and is arranged on connecting portion 46 periphery
Disc structure 47, connecting portion 46 for and main shaft 7 be threaded connection, described disc structure 47 is provided with multiple for multiple
Close the receiving recess 48 of high-abrasive material as depicted in figure 11.Thus can effectively avoid rupturing of composite abrasion resistance material.Circle
The radial dimension of disk-like structure is more than or equal to the 50% of back shroud of impeller 41 diameter.
The Pulp pump that the present embodiment provides, owing to using double shrouded wheel 4, is particularly suitable for carrying the medium of high concentration, easily
High-lift in realizing, double shrouded wheel 4 structure not only intensity is high, and its wearability, cavitation-resistance are obviously higher than common Pulp pump.
Embodiment 2
As shown in Fig. 7-10 and Figure 12, being substantially the same with embodiment 1, except for the difference that, described impeller 4 is semi-open type leaf
Wheel, described impeller 4 includes that back shroud 41, described primary blades 5 are arranged on back shroud 41 and by a smooth transition region 51
It is connected with inducer blade 6.
Primary blades 5 is mixed flow blade, and inducer blade 6 is axial blade.
A diameter of 300mm of suction inlet 2, a diameter of 150mm of discharge opening 3, suction inlet 2 area of section is discharge opening 3 sections
4 times of face area.
The Main Ingredients and Appearance of composite abrasion resistance material is aluminium oxide 82% (weight), vinylite 15% (weight).
It should be noted that owing to being connected by smooth transition region 51 between primary blades 5 and inducer blade 6, for improving waterpower
Efficiency, primary blades 5 and inducer blade 6 near smooth transition region 51 because seamlessly transitting and local deformation, thus cause main lobe
Sheet 5 is not the most strict centrifugeblade or mixed flow blade, and inducer blade 6 is not the most strict axial blade, but as long as
Its member and main geometric meets centrifugeblade (mixed flow blade) or the feature of axial blade, should include protection model of the present utility model in
Enclose.
Above-described only preferred embodiment of the present utility model, all in spirit of the present utility model and spirit
Any amendment, equivalent and the improvement etc. made, within should be included in protection domain of the present utility model.
Claims (9)
1. an anti-cavitation Pulp pump, including the pump housing, the described pump housing is provided with suction inlet and discharge opening, sets in the described pump housing
There is impeller, it is characterised in that: described impeller is provided with primary blades and inducer blade, and described inducer blade extends to suction inlet
In, described primary blades and inducer blade connect；The area of section of described suction inlet is the 3-10 of described discharge opening area of section
Times.
Anti-cavitation Pulp pump the most according to claim 1, it is characterised in that: described primary blades is centrifugeblade or mixed flow leaf
Sheet, inducer blade is axial blade.
Anti-cavitation Pulp pump the most according to claim 1, it is characterised in that: the described pump housing includes procapsid and back cover
Body, described procapsid inwall is provided with front liner, and described back casing inwall is provided with rear inner lining, described front liner and rear inner lining
Surround the fluid chamber for accommodating impeller and described discharge opening；Described impeller and described front liner, described rear inner lining are by being combined
High-abrasive material is constituted.
Anti-cavitation Pulp pump the most according to claim 3, it is characterised in that: it is provided with between described rear inner lining and back casing
Rear inner lining skeleton；Sealing gasket, described rear inner lining and rear inner lining skeleton it is provided with by viscous between described front liner and rear inner lining
Connect agent and be bonded into an entirety.
Anti-cavitation Pulp pump the most according to claim 4, it is characterised in that: also include after back casing and rear inner lining with
The main shaft that impeller connects, described main shaft is provided with accessory impeller, is provided with and is connected with back casing between described main shaft and back casing
Decompression lid and be arranged on the filler of main shaft periphery, described decompression lid and packing seal connect；Described decompression lid, rear inner lining
Skeleton, rear inner lining surround one and accommodate chamber, and described accessory impeller is positioned at this receiving intracavity.
Anti-cavitation Pulp pump the most according to claim 5, it is characterised in that: described impeller is enclosed impeller, described
Impeller include back shroud and ring-type front shroud, described primary blades is arranged between front shroud and back shroud, and described lures
Guide vane is arranged in the circular hollow portion of front shroud, and described primary blades and inducer blade are connected by smooth transition region.
Anti-cavitation Pulp pump the most according to claim 5, it is characterised in that: described impeller is half-opened impeller, described
Impeller include that back shroud, described primary blades are arranged on back shroud and are connected with inducer blade by smooth transition region.
8. according to the anti-cavitation Pulp pump described in claim 6 or 7, it is characterised in that: it is provided with metal material in described back shroud
The impeller framework of matter.
Anti-cavitation Pulp pump the most according to claim 8, it is characterised in that: described impeller framework include connecting portion and
Being arranged on the disc structure that connecting portion is peripheral, it is recessed that described disc structure is provided with multiple receiving for composite abrasion resistance material
Portion.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620677018X | 2016-06-28 | ||
| CN201620677018 | 2016-06-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205806036U true CN205806036U (en) | 2016-12-14 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620721285.2U Active CN205806036U (en) | 2016-06-28 | 2016-07-08 | A kind of anti-cavitation Pulp pump |
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| Country | Link |
|---|---|
| CN (1) | CN205806036U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105927595A (en) * | 2016-06-28 | 2016-09-07 | 广州市拓道流体设备技术有限公司 | Cavitation prevention slurry pump |
-
2016
- 2016-07-08 CN CN201620721285.2U patent/CN205806036U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105927595A (en) * | 2016-06-28 | 2016-09-07 | 广州市拓道流体设备技术有限公司 | Cavitation prevention slurry pump |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180326 Address after: 510000 room 1204, West Block 238, six road, Yuexiu District, Guangdong, Guangzhou, Zhongshan Patentee after: New Mstar Technology Ltd in Guangzhou Address before: 510030 304A room, No. 306, third floor, No. 302 Jiefang Road, Guangzhou, Guangdong, Yuexiu District Patentee before: GUANGZHOU TOTALL FLUID EQUIPMENT TECHNOLOGY CO., LTD. |