CN209469614U - A kind of desulfurization pump containing combined type impeller rotor - Google Patents
A kind of desulfurization pump containing combined type impeller rotor Download PDFInfo
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- CN209469614U CN209469614U CN201821842716.6U CN201821842716U CN209469614U CN 209469614 U CN209469614 U CN 209469614U CN 201821842716 U CN201821842716 U CN 201821842716U CN 209469614 U CN209469614 U CN 209469614U
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Abstract
The utility model relates to a kind of, and the desulfurization containing combined type impeller rotor pumps.The utility model includes combined type impeller rotor, pump case, pump inlet part, pump discharge part and pump postoperculum plate, and pump inlet part, pump discharge part, pump postoperculum plate are mounted on the pump chamber being enclosed in pump case for accommodating combined type impeller rotor；Combined type impeller rotor includes the impeller body being mounted on pump shaft, impeller body includes metal wheel hub liner and coats processing by way of compression molding in the nonmetallic blade liner body of metal wheel hub liner outer peripheral surface, and nonmetallic blade liner body is made of superhigh molecular weight polyethylene material.The utility model alleviates the self weight of impeller body, has saved material cost, in addition avoids the intensity that impeller body is also ensured while impeller body is blocked up；Impeller body not only wear resistant corrosion resistant, and the vibration values of pump are advantageously reduced, while easy to process, it is at low cost, substantially increase the operational efficiency of pump.
Description
Technical field
The utility model belongs to pump technical field, is specifically related to a kind of desulfurization pump containing combined type impeller rotor.
Background technique
Conventional impellers are usually to be made of metal material, this allow for most of metallic impeller corrosion resistance, wear no resistance,
Temperature difference resistance is low, is not suitable for soda acid and cold and hot condition, sub-fraction metallic impeller is corrosion-resistant, wearability is good but with high costs.
For example, traditional half-opened impeller is to guarantee blade strength, material is mostly metal, however when pump conveys some stronger Jie of corrosivity
Metal material is put forward higher requirements when matter, such as 316L type stainless steel, two-way stainless steel, Hastelloy.This can not only increase
Add material cost, since these material surface hardness are high, while processing is put forward higher requirements, cost is caused significantly to increase
Add.It is special due to this structure in addition, main function is anti-corrosion in the market there are also some nonmetallic half-opened impeller structures
Property will increase vane thickness for intensity needed for adapting to high-speed rotating impeller in the design process.According to Paddle Pump Designing
Principle it is found that when blade is thicker its blade inlet and outlet excretion coefficient will increase, cause the efficiency of pump to decline, when pump for a long time transport
Row, it will increase customer using cost.
Utility model content
In order to solve the above-mentioned technical problem, the utility model provides a kind of desulfurization pump containing combined type impeller rotor.It should
Desulfurization pump abrasion-proof corrosion-proof is strong, suitable for conveying liquid, gas and the acid-base mixture of solid, can be widely applied to thermoelectricity, steel
The fields such as iron, coal chemical industry, heat supply and environmental protection treatment.
In order to realize the purpose of this utility model, the utility model uses following technical scheme:
It is a kind of containing combined type impeller rotor desulfurization pump, including combined type impeller rotor, pump case, pump inlet part,
Pump discharge part and pump postoperculum plate, the pump inlet part, pump discharge part, pump postoperculum plate are mounted in pump case and enclose shape
At the pump chamber for accommodating the combined type impeller rotor；The combined type impeller rotor includes the impeller sheet being mounted on pump shaft
Body, the impeller body include metal wheel hub liner and coat processing by way of compression molding outside metal wheel hub liner
The nonmetallic blade liner body of circumferential surface, the nonmetallic blade liner body are made of superhigh molecular weight polyethylene material.
Further technical solution: the impeller body front end is equipped with locking nut and is located at the impeller body and lock
Sealing element between tight nut, the locking nut include the metal inner lining being threadedly engaged with pump shaft and by compression molding
Mode coats processing in metal inner lining outer peripheral surface and is pressed on the sealing element nonmetallic in the nonmetallic blade liner body
Parent, the nonmetallic parent are in nut cap shape, and nonmetallic parent described in the thread tapping of the pump shaft front end is threadedly engaged with being formed, institute
Nonmetallic parent is stated to be made of superhigh molecular weight polyethylene material.
Further technical solution: the metal wheel hub liner be located at the impeller body back side one end formed with it is described non-
Metal blade liner body outer peripheral surface is concordant and the bulge loop of end face fitting.
Further technical solution: the front end face of the nonmetallic blade liner body is equipped with for placing the recessed of the sealing element
Slot, the side of the nonmetallic parent are equipped with card in the groove and the shoulder for compressing the sealing element, the shoulder
Outer peripheral surface be that the diameter of the conical surface and the conical surface is gradually reduced by pump shaft front end rearwardly direction, the conical surface and nonmetallic parent
Axis angle α be 1-5 degree.
Further technical solution: the metal wheel hub liner is in the form of annular discs, if lining offers in the metal wheel hub
The dry gap slot circumferentially uniformly distributed along metal wheel hub liner, the depth of the gap slot is along metal wheel hub liner radial direction arrangement, institute
It states lining in metal wheel hub and is also provided with several through-holes between adjacent gap slot.
Further technical solution: the impeller body back side is equipped with the circular step A coaxial with pump shaft, the pump postoperculum
The medial surface of plate is equipped with the identical step B of and shape opposite with the step A, sets in the gap between the step A and step B
There is the back vane structure being mounted on step A.
Further technical solution: the metal wheel hub liner overall diameter is the 1/4-3/4 of impeller body overall diameter, described
The depth of gap slot is the 1/4 of metal wheel hub liner overall diameter, and the quantity of the gap slot is 4-12, the diameter of the through-hole
For the 1/15-3/15 of metal wheel hub liner overall diameter, the quantity of the through-hole is 2-4 times of gap slot.
Further technical solution: the back vane structure include the first order back blade that is mounted on first order step with
And it is mounted on the second level back blade on the step of the second level, the first order back blade is radially close to impeller body center cloth
It sets, the second level back blade is radially away from the impeller body center arrangement, and the first order back blade and the second level are carried on the back
Blade is along the circumferentially staggered arrangement of impeller body, and the first order back blade is compared to second level back blade further from the impeller sheet
Body front end.
Further technical solution: the first order back blade is prismatic blade structure or bent blades structure, the second level
Back blade is prismatic blade structure or bent blades structure.
Further technical solution: the first order back blade overall diameter size is the 2/5-4/5 of impeller body overall diameter.
The utility model has the beneficial effects that:
(1) pump chamber wear resistant corrosion resistant described in the utility model is more suitable for conveyer belt particulate species medium, and is easy to combined type
The installation and removal of vane rotor.The high-intensitive advantage of ultra-high molecular weight polyethylene superior abrasion resistance and metal is incorporated in one
It rises, alleviates the self weight of impeller body, saved material cost, in addition avoid also ensuring impeller while impeller body is blocked up
The intensity of ontology.The utility model impeller body is that two kinds of Material claddings of metal and plastics form, using heat fusing mould pressing technology,
Ultra-high molecular weight polyethylene (UHMW-PE) nonmetallic blade liner body constituted and metal wheel hub liner are securely joined with into one
It is whole.
Impeller body described in the utility model is using first processing metal wheel hub liner, then is processed by way of compression molding
Nonmetallic blade liner body, the impeller body not only wear resistant corrosion resistant, but also reduce blade body imbalance eccentric moment and
Start inertia, has ensured the dynamic balancing degree of blade body, advantageously reduced the vibration values of pump.The impeller body can also basis
Actual service conditions replaces the constituent material of nonmetallic blade liner body, and the material of metal wheel hub liner is constant.The impeller sheet
Body is easy to process, at low cost, and substantially increases the operational efficiency of pump.
(2) similarly, the locking nut is formed by two kinds of Material claddings of metal and plastics, using heat fusing mould pressing technology,
Ultra-high molecular weight polyethylene (UHMW-PE) nonmetallic parent constituted and metal inner lining are securely joined with into an entirety.This
Utility model combined type locking nut is threadedly engaged by metal inner lining with pump shaft, the pump shaft front end nonmetallic parent of thread tapping is formed
It is threadedly engaged to realize installation, the bonding strength of outside nonmetallic parent and pump shaft can be increased in this way, while reducing in non-gold
Belong to the process that parent opens screw thread.I.e. not only wear resistant corrosion resistant, intensity are high for the utility model, and overall weight substantially reduces.
In addition, there is non-metallic seal between the locking nut and impeller body, locking nut side is equipped with shoulder, institute
Stating shoulder side is " conical surface ", and the angle α for being somebody's turn to do the axis of " conical surface " and pump shaft is about 1-5 °, and the shoulder structure makes compound
Formula locking nut is easy to mounted, at the same the combined type locking nut pass through during installation the nonmetallic parent shoulder squeeze
Laminate seal, the conical surface of shoulder gradually extends out when the shoulder squeeze sealing member of nonmetallic parent, to form certain radial become
Shape, while the conical surface can reduce the sealing area between shoulder and sealing element, effectively enhance sealing effect with this.
(3) metal wheel hub liner convex ring described in the utility model is exposed outside, i.e. metal wheel hub liner peripheral side
It is not molded with nonmetallic materials all, it is self cooled that the bulge loop has the characteristics that impeller body, while can also be to both-end
Face sealing is cooled down.The gap slot of lining, the set-up mode of through-hole are both able to satisfy leaf in metal wheel hub described in the utility model
Intensity needed for piece high speed rotation, and may be implemented effectively to engage between metal wheel hub liner and nonmetallic blade liner body, simultaneously
Vane thickness can also be reduced, material cost can be effectively reduced in this way and improve the operational efficiency of pump.
(4) the impeller body back side described in the utility model is equipped with back vane structure, and the back blade is with impeller body one
Rotation is played, lift is generated, while blade axial force can be greatly reduced, first order back blade outlet pressure can also be increased, is hindered
Only high-pressure medium enters in the seal chamber formed between the impeller body back side and mechanical seal at blade exit, to greatly reduce
Requirement of the mechanical seal to pressure.The first order back blade, second level back blade cooperate, and are preventing particle from entering impeller
Under the premise of the ontology back side and reduction axial force, it is greatly improved the operational efficiency of pump.
Detailed description of the invention
FIG. 1 is a schematic structural view of the utility model.
Fig. 2 is impeller body scheme of installation.
Fig. 3 is impeller body structural schematic diagram.
Fig. 4 is impeller body structure schematic diagram.
Fig. 5,6 are metal wheel hub inner lining structure schematic diagram.
Fig. 7 is lock nut structure diagram.
Fig. 8 is value simulation and experiment external characteristic curve.
Fig. 9 is the speed cloud atlas of combined type impeller internal flow.
Figure 10 is the Vorticity Distribution figure of straight-bent blades interlaced arrangement.
Figure 11 is the Vorticity Distribution figure of straight-prismatic blade interlaced arrangement.
Attached meaning marked in the figure is as follows:
11- pump shaft；12- impeller body；121- metal wheel hub liner；1211- gap slot；1212- through-hole；1213- bulge loop；
The nonmetallic blade liner body of 122-；123- back vane structure；1231- first order back blade；The second level 1232- back blade；13- locking
Nut；131- metal inner lining；1311- screw thread；The nonmetallic parent of 132-；The 1321- conical surface；14- sealing element；15- first annular seal space；
The second seal chamber of 16-；17- double seals；18- pump postoperculum plate；19- pump inlet part；20- pump case；21- pumps out oral area
Point.
Specific embodiment
More specific detail is made to technical solutions of the utility model below with reference to embodiment:
As shown in Figure 1,2,3, 4: the utility model includes combined type impeller rotor, pump case 20, pump inlet part 19, pump
Exit portion 21 and pump postoperculum plate 18, the pump inlet part 19, pump discharge part 21, pump postoperculum plate 18 are mounted on pump case
On 20 and it is enclosed the pump chamber for accommodating the combined type impeller rotor.The pump case 20, pump inlet part 19, pump
The pump chamber medial surface that exit portion 21 and pump postoperculum plate 18 are constituted is equipped with non-metallic inner liner (ultra-high molecular weight polyethylene).Institute
Pump chamber wear resistant corrosion resistant is stated, is more suitable for conveyer belt particulate species medium, and be easy to the installation and removal of combined type impeller rotor.
The combined type impeller rotor includes the impeller body 12 being mounted on pump shaft 11, and the impeller body 12 includes gold
Belong to wheel hub liner 121 and coats processing by way of compression molding in the nonmetallic leaf of 121 outer peripheral surface of metal wheel hub liner
Piece liner body 122, the nonmetallic blade liner body 122 are made of superhigh molecular weight polyethylene material.The impeller body 12 passes through
Metal wheel hub liner 121 and pump shaft 11 carry out key cooperation and realize installation positioning.121 material of metal wheel hub liner is carbon steel,
11 material of pump shaft is stainless steel, and the metal wheel hub liner 121 is different from 11 the two material of pump shaft.
The high-intensitive advantage of ultra-high molecular weight polyethylene superior abrasion resistance and metal is combined together by the utility model, is subtracted
The light self weight of impeller body, while having saved material cost, also ensures the intensity of impeller body 12.The utility model leaf
Taking turns ontology 12 is that two kinds of Material claddings of metal and plastics form, using heat fusing mould pressing technology, by ultra-high molecular weight polyethylene
(UHMW-PE) the nonmetallic blade liner body 122 and metal wheel hub liner 121 constituted is securely joined with into an entirety.
Impeller body 12 described in the utility model is using first processing metal wheel hub liner 121, then the side by compression molding
Formula machining of non-metallic blade liner body 122, the impeller body 12 not only wear resistant corrosion resistant, and also it is uneven to reduce blade body 12
The eccentric moment that weighs and starting inertia, have ensured the dynamic balancing degree of blade body 12, have advantageously reduced the vibration values of pump.The impeller
Ontology 12 can also replace the constituent material of nonmetallic blade liner body 122 according to actual service conditions, and metal wheel hub liner 121
Material it is constant.
The metal wheel hub liner 121 is formed and the nonmetallic blade liner body in the one end for being located at 12 back side of impeller body
122 outer peripheral surfaces are concordant and the bulge loop 1213 of end face fitting.121 convex ring 1213 of metal wheel hub liner described in the utility model is exposed
Outside, i.e., described 121 peripheral side of metal wheel hub liner is not molded with nonmetallic materials all, and the bulge loop 1213 makes impeller sheet
Body 12 has the characteristics that self cooled, while can also cool down to double seals 17.
12 front end of impeller body be equipped with locking nut 13 and be located at the impeller body 12 and locking nut 13 it
Between sealing element 14, the locking nut 13 includes the metal inner lining 131 being threadedly engaged with pump shaft 11 and passes through compression molding
Mode coat processing and be pressed on the nonmetallic blade liner body 122 in 131 outer peripheral surface of metal inner lining and by the sealing element 14
On nonmetallic parent 132, the nonmetallic parent 132 is in nut cap shape, nonmetallic mother described in the 11 front end thread tapping of pump shaft
Body 132 is threadedly coupled with being formed, and the nonmetallic parent 132 is made of superhigh molecular weight polyethylene material.That is, described
The mounting means of locking nut 13 and the pump shaft 11 are as follows: the pump shaft 11 passes through in the screw thread and metal opened up on itself side
Lining 131 and nonmetallic parent 132 carry out immovable fitting.It should be noted that: the rotation direction of the screw thread opened up on 11 side of pump shaft
Rotation direction with the pump shaft 11 is on the contrary, to prevent locking nut 13 from getting loose when pump shaft 11 rotates.
The locking nut 13 is formed by two kinds of Material claddings of metal and plastics, using heat fusing mould pressing technology, by superelevation
The nonmetallic parent 132 and metal inner lining 131 that molecular weight polyethylene (UHMW-PE) is constituted are securely joined with into an entirety.This
The mounting structure of utility model combined type locking nut 13 can increase the bonding strength of outside nonmetallic parent 132 and pump shaft 11,
Reduce the process for opening screw thread in nonmetallic parent 132 simultaneously.I.e. not only wear resistant corrosion resistant, intensity are high and whole for the utility model
Body weight substantially reduces.
As shown in Figure 6: the front end face of the nonmetallic blade liner body 122 is equipped with for placing the recessed of the sealing element 14
Slot, the side of the nonmetallic parent 132 is equipped with card in the groove and the shoulder for compressing the sealing element 14, described
The outer peripheral surface of shoulder is gradually reduced for the diameter of the conical surface 1321 and the conical surface by 11 front end rearwardly direction of pump shaft, the conical surface
1321 and the angle α of the axis of nonmetallic parent 132 are 1-5 degree.The shoulder structure is easy to combined type locking nut 13
Installation, while the combined type locking nut 13 passes through the shoulder squeeze sealing member 14 of the nonmetallic parent 132 during installation,
The conical surface 1321 of shoulder gradually extends out when the shoulder squeeze sealing member 14 of nonmetallic parent 132, to form certain radial change
Shape, while the conical surface 1321 can reduce the sealing area between shoulder and sealing element 14, effectively enhance sealing effect with this.
The nonmetallic parent 132 is different from 14 the two material of sealing element, because once the two material is identical, easily sends out
Green material bonding causes to kill, not easy to disassemble.
Above-mentioned ultra-high molecular weight polyethylene is the unbranched linear polyethylene of 1,500,000 or more molecular weight.Molecular formula :-
(—CH2-CH2-)-n-, density: 0.920-0.964g/cm3, 85 DEG C of heat distortion temperature (0.46MPa), fusing point 130-136
℃。
As shown in Figure 5,6: the metal wheel hub liner 121 is in the form of annular discs, if offering on the metal wheel hub liner 121
The dry gap slot 1211 circumferentially uniformly distributed along metal wheel hub liner 121, the depth of the gap slot 1211 is along metal wheel hub liner
121 radial directions are arranged, are also provided with several through-holes between adjacent gap slot 1211 on the metal wheel hub liner 121
1212。
The 121 overall diameter D of metal wheel hub linerhFor 12 overall diameter D of impeller body21/4-3/4, the gap slot
1211 depth h is 121 overall diameter D of metal wheel hub linerh1/4, the quantity of the gap slot 1211 is 4-12 (attached drawings 5
In be set as 8), the diameter d of the through-hole 1212 is 121 overall diameter D of metal wheel hub linerh1/15-3/15, the through-hole
1212 quantity is 2-4 times of gap slot 1211.
The structure of metal wheel hub liner 121 described in the utility model, such as the set-up mode of gap slot 1211, through-hole 1212
Not only intensity needed for being able to satisfy blade high speed rotation, but may be implemented metal wheel hub liner 121 and nonmetallic blade liner body 122 it
Between effectively mediate, while vane thickness can also be reduced, effectively less material cost and can improve the operation of pump in this way and imitate
Rate.
12 back side of impeller body is equipped with for installing back vane structure 123 and the circular step A coaxial with pump shaft 11,
The back vane structure 123 includes the first order back blade 1231 being mounted on first order step and is mounted on second level step
On second level back blade 1232, the first order back blade 1231 is radially close to impeller body center arrangement, described second
Grade back blade 1232 is radially away from the impeller body center arrangement, the first order back blade 1231 and second level back blade
1232 along the circumferentially staggered arrangement of impeller body, and the first order back blade 1231 is compared to second level back blade 1232 further from institute
State 12 front end of impeller body.
The back vane structure rotates together with impeller body 12, generates pressure, can greatly reduce blade axial force
At the same time it can also increase the pressure at first order back blade 1231, high-pressure medium at blade exit is prevented to enter impeller body 12
In the second seal chamber 16 formed between the back side and mechanical seal, can greatly reduce requirement of the mechanical seal to pressure and
Effective protection static and dynamic sealing face.
The step B that the medial surface of the pump postoperculum plate 18 coincide equipped with and shape opposite with the step A, described in this way
Among rank A and step B, i.e. the junction of first order step and second level step just will form turning for an obstruction medium back flow
Point further increases the operational efficiency of pump to prevent medium back flow.
The first order and second level notopodium plate shape is prismatic blade structure, bent blades structure or prismatic blade
Structure and bent blades structure interlaced arrangement, if first order back blade is prismatic blade structure, second level back blade is bent blades structure；
Or first order back blade is bent blades structure, second level back blade is prismatic blade structure.First order back blade, second level notopodium
Piece cooperates, and under the premise of preventing solid particle and reducing axial force, is greatly improved the operational efficiency of pump.
The 1231 diameter D of first order back bladeb1Size is impeller body overall diameter D22/5-4/5, when fluid is defeated
When sending in medium containing solid particle, solid particle can more efficiently be prevented to enter in the second seal chamber 16.
The pump of desulfurization composed by a certain combined type impeller rotor, operating parameter Q=1058m3/ h, lift H=34m,
Revolving speed n=1450r/min.Its crucial geometric parameter impeller body overall diameter D2=400mm, the depth h=of gap slot 1211
68mm, metal wheel hub liner overall diameter Dh=258mm, through-hole diameter d=18mm.In addition, for ease of illustration of the utility model
Effective effect provides two kinds of technical solutions in following example, wherein the first scheme: first order back blade is prismatic blade knot
Structure, second level back blade are bent blades structure；Second scheme: first order back blade is prismatic blade structure, second level back blade
For prismatic blade structure.First order back blade diameter under two kinds of technical solutions is all satisfied Db1=220mm.
The utility model verifies the above method using computation fluid dynamics technology.First, in accordance with above-mentioned design
The hydraulic model of combined type impeller rotor part two-dimensional design is carried out in CAD mapping software.Secondly, by designed waterpower
Model imports in Three-dimensional Design Software, generates three-dimensional blades entity, is further processed on this basis, obtains three-dimensional computations
Water body.Furthermore the model handled well is imported into grid dividing software ANSYS ICEM and carries out grid dividing.Last applicating fluid stream
Dynamic analysis software ANSYS CFX or ANSYS FLUENT etc. carries out numerical simulation, and wherein calculation method and boundary condition are set
It sets as follows:
Discrete, the control of Numerical simulation of 3-D turbulent is carried out to three-dimensional incompressible fluid governing equation using finite volume method
When equation processed includes cavitation model based on two phase flow mixed model, Reynolds (RANS) Na Wei-Stokes (N-S) equation with
And be more suitable fluid separation SST k- ω (shear stress transport) turbulence model.The discrete use of governing equation
Control volume mothod, equation diffusion term are center difference scheme, and convective term is Second-order Up-wind format.Equation solution is hidden using separation half
Formula coupling pressure algorithm.Inlet boundary condition uses stagnation pressure import, and export boundary condition is exported using mass flow, Wall-function
Using without sliding wall surface, reference pressure 0Pa, the energy transmission use between rotary part (impeller) and stationary parts (guide vane)
" Frozen Rotor " mode connects, and calculates convergence and is set as 10-5, medium is 25 ° of water.
Calculated result analysis: for the accuracy for verifying this method, numerical simulation result and model experiment results are compared
Compared with analysis, as shown in Figure 8.As can be drawn from Figure 8, in operating point for design, the experiment lift H of pumpexp=33.95m, numerical simulation
As a result (H=35.6m) compared with model experiment, error 4.85%.Relative efficiency curve it can be concluded that, numerical simulation efficiency is
67.05%, model experiment efficiency is 64.78%, and error is only 3.51%.It can be seen that resulting compound using the above method
Formula vane rotor is fully able to meet design needs on hydraulic performance；Simultaneously for other side, Numerical-Mode is demonstrated
The accuracy of quasi- result, provides theoretical foundation for following interpretation of result.
Fig. 9 is the speed cloud atlas of combined type impeller internal flow, it can be seen from the figure that (the Q=under design conditions
1.0Qdes, QdesFor design discharge) combined type impeller internal flow comparatively runs, it is carried on the back in first order back blade and the second level
Blade interior is without local high-speed region, without apparent backflow phenomenon.When pump is run under big flow or low flow rate condition,
There is local high velocity inside back blade, along with backflow phenomenon, these recirculating zones are only occurred in the back blade of the second level,
In first order back blade without reflux and local high-speed region.Therefore, the fluid flowed out inside primary blades will not flow back into notopodium
In the cavity that piece and back shroud are formed, this hair valve 10 and Figure 11 be can see, straight-bent blades interlaced arrangement (first layer notopodium
Piece is prismatic blade, and the second back blade is bent blades) (first layer back blade is prismatic blade, the second back to relatively straight-prismatic blade interlaced arrangement
Blade is also prismatic blade) combined type impeller inside vorticity it is larger, it is especially more obvious in second layer blade interior vorticity, and
The region that whirlpool movement occurs in directly-curved back blade interlaced arrangement combined type impeller also significantly increases.It is generally believed that when vorticity is larger
Region be also whirlpool occur probability it is bigger, the appearance of whirlpool is beneficial to prevent solid particle and enters back blade and back shroud
Between in the cavity that is formed.Therefore, the combined type impeller rotor of straight-curved back blade interlaced arrangement can preferably prevent solid
Grain enters in mechanical seal cavity, can preferably ensure that the work of mechanical seal safety and steady, more mechanical seal use the longevity
Life.Directly-curved back blade interlaced arrangement combined type impeller rotor this be also the preferred embodiment of the utility model.
Claims (10)
1. a kind of desulfurization pump containing combined type impeller rotor, it is characterised in that: including combined type impeller rotor, pump case
(20), pump inlet part (19), pump discharge part (21) and pump postoperculum plate (18), the pump inlet part (19), pump discharge
Partially (21), pump postoperculum plate (18) are mounted on the pump being enclosed on pump case (20) for accommodating the combined type impeller rotor
Chamber；The combined type impeller rotor includes the impeller body (12) being mounted on pump shaft (11), and the impeller body (12) includes
Metal wheel hub liner (121) and coated by way of compression molding processing in the non-of metal wheel hub liner (121) outer peripheral surface
Metal blade liner body (122), the nonmetallic blade liner body (122) are made of superhigh molecular weight polyethylene material.
2. desulfurization pump as described in claim 1, it is characterised in that: impeller body (12) front end is equipped with locking nut (13)
And the sealing element (14) between the impeller body (12) and locking nut (13), the locking nut (13) include with
The metal inner lining (131) and processing is coated by way of compression molding in metal inner lining (131) that pump shaft (11) is threadedly engaged
Outer peripheral surface and the sealing element (14) is pressed on the nonmetallic parent (132) on the nonmetallic blade liner body (122), it is described
Nonmetallic parent (132) is in nut cap shape, and nonmetallic parent (132) described in the thread tapping of pump shaft (11) front end is matched with forming screw thread
It closes, the nonmetallic parent (132) is made of superhigh molecular weight polyethylene material.
3. desulfurization pump as described in claim 1, it is characterised in that: the metal wheel hub liner (121) is being located at impeller body
(12) one end at the back side forms the bulge loop (1213) that and end face concordant with nonmetallic blade liner body (122) outer peripheral surface is bonded.
4. desulfurization pump as claimed in claim 2, it is characterised in that: the front end face of the nonmetallic blade liner body (122) is equipped with
For placing the groove of the sealing element (14), the side of the nonmetallic parent (132) is equipped with card in the groove and uses
In the shoulder for compressing the sealing element (14), the outer peripheral surface of the shoulder is the conical surface (1321) and the diameter of the conical surface is by pump shaft
(11) front end rearwardly direction is gradually reduced, and the angle α of the axis of the conical surface (1321) and nonmetallic parent (132) is 1-5
Degree.
5. desulfurization pump as claimed in claim 2, it is characterised in that: the metal wheel hub liner (121) is in the form of annular discs, the gold
Belong to and offers several gap slots (1211) circumferentially uniformly distributed along metal wheel hub liner (121) on wheel hub liner (121), it is described to lack
The depth of mouthful slot (1211) radially arranges along metal wheel hub liner (121), the metal wheel hub liner (121) if on be also provided with
The dry through-hole (1212) between adjacent gap slot (1211).
6. desulfurization pump as claimed in claim 1 or 2, it is characterised in that: impeller body (12) back side is equipped with and pump shaft
(11) coaxial circular step A, the medial surface of the pump postoperculum plate (18) are equipped with the identical platform of and shape opposite with the step A
Rank B is equipped with the back vane structure (123) being mounted on step A in the gap between the step A and step B.
7. desulfurization pump as claimed in claim 5, it is characterised in that: metal wheel hub liner (121) overall diameter is impeller sheet
The 1/4-3/4 of body (12) overall diameter, the depth of the gap slot (1211) are the 1/4 of metal wheel hub liner (121) overall diameter, institute
The quantity for stating gap slot (1211) is 4-12, and the diameter of the through-hole (1212) is metal wheel hub liner (121) overall diameter
, the quantity of the through-hole (1212) is 2-4 times of gap slot (1211).
8. desulfurization pump as claimed in claim 6, it is characterised in that: the back vane structure (123) includes being mounted on the first order
First order back blade (1231) on step and the second level back blade (1232) being mounted on the step of the second level, described first
Radially close to impeller body center arrangement, the second level back blade (1232) is radially away from described grade back blade (1231)
Impeller body center arrangement, the first order back blade (1231) and second level back blade (1232) are circumferentially staggered along impeller body
Arrangement, the first order back blade (1231) is compared to second level back blade (1232) further from before the impeller body (12)
End.
9. desulfurization as claimed in claim 8 pump, it is characterised in that: the first order back blade (1231) be prismatic blade structure or
Bent blades structure, the second level back blade (1232) are prismatic blade structure or bent blades structure.
10. desulfurization as claimed in claim 8 pump, it is characterised in that: first order back blade (1231) the overall diameter size is
The 2/5-4/5 of impeller body (12) overall diameter.
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| Application Number | Priority Date | Filing Date | Title |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109386497A (en) * | 2018-11-09 | 2019-02-26 | 合肥工业大学 | A kind of desulfurization pump containing combined type impeller rotor |
| CN114033700A (en) * | 2021-12-06 | 2022-02-11 | 西安航空学院 | Make things convenient for anti cavitation's of shock attenuation protection centrifugal pump |
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2018
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109386497A (en) * | 2018-11-09 | 2019-02-26 | 合肥工业大学 | A kind of desulfurization pump containing combined type impeller rotor |
| CN114033700A (en) * | 2021-12-06 | 2022-02-11 | 西安航空学院 | Make things convenient for anti cavitation's of shock attenuation protection centrifugal pump |
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