CN201661510U - Guide impeller of multistage centrifugal pump and multistage centrifugal pump - Google Patents
Guide impeller of multistage centrifugal pump and multistage centrifugal pump Download PDFInfo
- Publication number
- CN201661510U CN201661510U CN2010201280562U CN201020128056U CN201661510U CN 201661510 U CN201661510 U CN 201661510U CN 2010201280562 U CN2010201280562 U CN 2010201280562U CN 201020128056 U CN201020128056 U CN 201020128056U CN 201661510 U CN201661510 U CN 201661510U
- Authority
- CN
- China
- Prior art keywords
- guide vane
- impeller
- vane wheel
- axle sleeve
- wheel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Abstract
The utility model discloses a guide impeller of a multistage centrifugal pump and the multistage centrifugal pump applying the same. The guide impeller comprises a guide blade and a guide blade cavity covering the guide blade, wherein the guide blade cavity comprises a guide impeller cover plate parallel to the guide blade and a cover edge where the edge of the guide impeller cover plate extends axially towards the direction of the blade; and the cover plate and the cover edge are formed integrally. Due to the integrally formed structure of the guide impeller cover plate and the cover edge, the degree of axial symmetry is high, that is, the heights in various directions are consistent and the spaces among various impeller assemblies of the assembled multistage centrifugal pump are identical. The work is stable and the noise is low.
Description
Technical field
The utility model relates to a kind of centrifugal pump guide vane wheel and a kind of centrifugal pump, relates in particular to a kind of multistage centrifugal pump wheel and a kind of multistage centrifugal pump.
Background technique
Centrifugal pump is as a kind of simple in structure, and the liquid delivery pump of reliable performance now has been widely used in the every aspect of producing, living.The basic structure of centrifugal pump comprises pump case, rotating shaft, impeller, axle sleeve and gland seal device; Have liquid-inlet and liquid outlet on the described pump case, impeller and axle sleeve are positioned at pump case, impeller axis position and axle sleeve axis position are provided with axis hole, described rotating shaft injection pump case, space between airtight pump case of described gland seal device and the rotating shaft, rotating shaft runs through the axis hole of impeller and the axis hole of axle sleeve, the axis hole of impeller all engages with rotating shaft with the axis hole of axle sleeve, driving rotating shaft by power such as the motor in the external world or internal-combustion engines then rotates, and then the impeller rotation, the liquid in the impeller is subjected to the promotion of blade and rotates jointly with blade.The centrifugal force that is produced by rotation makes liquid outwards be moved by the center, and obtains the momentum increment.In the impeller periphery, liquid is thrown out of, and the liquid outlet by pump case transfers out, because the attenuating of liquid velocity, part kinetic energy is converted into the pressure energy in the course of conveying, thereby the resistance that overcomes discharge conduit constantly outflows.The liquid at suction eye place makes the suction port place form low pressure (or vacuum) because of outwards throwing away, thereby the liquid in the suction pit is pressed into the suction port of impeller continuously by the liquid-inlet on the pump case under liquid level pressure (being generally atmospheric pressure) effect, forms the continuous effect of pumping.
Wherein impeller is the core of centrifugal pump, and the high ouput force of its rotating speed is big, and the blade on the impeller plays main effect again, and impeller will pass through experiment of dynamic balancing before assembling.Inner and outer surface on the impeller requires smooth, to reduce the frictional loss of current.
Pump case is the main body of water pump.Play the support fixation effect.
The effect of rotating shaft is to be connected with motor, and impeller is passed in the torque of motor, so it is the critical piece that transmits mechanical energy.
Gland seal device plays the effect in space between sealing pivot and the pump case, avoids leaking.
The above is the general structure of centrifugal pump, and in the actual production using process, in order to obtain higher lift or pressure, we also often use multistage centrifugal pump.
The essential structure of multistage centrifugal pump is similar with Ordinary Centrifugal Pumps, but multistage centrifugal pump is provided with a plurality of impellers, separate by guide vane wheel between the impeller, guide vane wheel inside is provided with the fluid passage, and the effect of this fluid passage is the suction port place that the centrifugal liquid that goes out of impeller is imported to the next stage impeller.
Usually the structure of guide vane wheel comprises guide vane and the stator chamber that overlays on the described guide vane, it is characterized in that: described stator chamber comprises the guide vane wheel cover plate parallel with guide vane, and the guide vane wheel side edge thereof is to the axially extended lid edge of direction blade, the lid edge is to make respectively with cover plate, weld then, there is following problem in such guide vane wheel:
1. owing to adopt welding procedure, there is fabrication error when welding between guide vane wheel cover plate and the lid edge inevitably, make guide vane wheel integral shaft symmetry degree poor, different amount be it seems like this, the axial height of guide vane wheel is inconsistent, influence the assembly precision and the service behaviour of centrifugal pump, be embodied in lift and diminish, operating noise becomes big or flow diminishes etc.
2. because the height of guide vane wheel is inconsistent, cause the spacing of each impeller sets of multistage centrifugal pump inconsistent.Make between the impeller sets liquid conductive and propagation of pressure and design inconsistent.
The model utility content
The technical problem that the utility model mainly solves provides a kind of assembly precision height, and the multistage centrifugal pump wheel of working stability and performance and design match, the multistage centrifugal pump of low noise.
For realizing first goal of the invention, the utility model provides a kind of multistage centrifugal pump wheel, comprise guide vane and the stator chamber that overlays on the described guide vane, described stator chamber comprises the guide vane wheel cover plate parallel with guide vane, and the guide vane wheel side edge thereof is to the axially extended lid edge of direction blade, and described cover plate and lid are along being formed in one.
Wherein, described guide vane wheel is made for the PPO material.
For realizing second goal of the invention, the utility model provides a kind of multistage centrifugal pump, comprises pump case, rotating shaft, impeller, guide vane wheel and gland seal device; Have liquid-inlet and liquid outlet on the described pump case, impeller and guide vane wheel are equipped with axis hole, described impeller and guide vane wheel are positioned at pump case, described rotating shaft injection pump case, space between airtight pump case of described gland seal device and the rotating shaft, rotating shaft runs through impeller and circumferentially engages with the axis hole of guide vane wheel and with impeller, has wheel disc on the described impeller, blade, blade and wheel disc fix, wheel disc is circular, and to extending pipe spreader, being shaped as of described pipe spreader is cylindrical along impeller shaft at the axis position of wheel disc, the axis position of pipe spreader is the axis hole of described impeller, described guide vane wheel comprises guide vane and the stator chamber that overlays on the described guide vane, and described stator chamber comprises the guide vane wheel cover plate parallel with guide vane, and the guide vane wheel side edge thereof is to the axially extended lid edge of direction blade, and described cover plate and lid are along being formed in one.
Wherein, described pipe spreader skin is a plastic material, and internal layer is a metal material.
Wherein, described impeller material is PPO, described metal material is a stainless steel, being shaped as of the internal layer of described pipe spreader is cylindrical by the cylindricality behind the pair of parallel planar interception, spacing between the described pair of parallel plane is less than described columniform diameter, the internal layer of described pipe spreader is that the butt joint of head and the tail both sides formed after a tinsel curled, the both sides engagement of joint tinsel head and the tail.
For realizing second goal of the invention of the present invention, the utility model also provides another kind of multistage centrifugal pump, comprises pump case, rotating shaft, impeller, axle sleeve, guide vane wheel and gland seal device; Have liquid-inlet and liquid outlet on the described pump case, impeller, axle sleeve and guide vane wheel are equipped with axis hole, described impeller, axle sleeve and guide vane wheel are positioned at pump case, described rotating shaft injection pump case, space between airtight pump case of described gland seal device and the rotating shaft, rotating shaft runs through impeller, axle sleeve circumferentially engages with the axis hole of guide vane wheel and with impeller and axle sleeve, has wheel disc on the described impeller, blade, blade and wheel disc fix, wheel disc is circular, and described axle sleeve and impeller are split type, and being shaped as of described axle sleeve is cylindrical, the axis position of axle sleeve is the axis hole of described impeller, described guide vane wheel comprises guide vane and the stator chamber that overlays on the described guide vane, and described stator chamber comprises the guide vane wheel cover plate parallel with guide vane, and the guide vane wheel side edge thereof is to the axially extended lid edge of direction blade, and described cover plate and lid are along being formed in one.
Wherein, described axle sleeve skin is a plastic material, and internal layer is a metal material.
Wherein, described impeller material is PPO, described metal material is a stainless steel, being shaped as of the internal layer of described axle sleeve is cylindrical by the cylindricality behind the pair of parallel planar interception, spacing between the described pair of parallel plane is less than described columniform diameter, the internal layer of described axle sleeve is that the butt joint of head and the tail both sides formed after a tinsel curled, the both sides engagement of joint tinsel head and the tail.
Because guide vane wheel cover plate of the present utility model is taked integrated structure with the lid edge, thus axisymmetric degree height, promptly respectively to the height homogeneous, spacing unanimity between each impeller sets of the multistage centrifugal pump that assembles out, working stability, noise is low.
Description of drawings
Fig. 1 is the worm's eye view of the utility model embodiment 1 guide vane wheel;
Fig. 2 is the longitudinal section schematic representation of the utility model embodiment 1 guide vane wheel;
Fig. 3 is the structure explosive view of the utility model embodiment 1 guide vane wheel;
Fig. 4 is the schematic perspective view of the utility model embodiment 2 impellers;
Fig. 5 is the structural representation of the utility model embodiment 2 impellers;
Fig. 6 is the explosive view of the utility model embodiment 2 multistage centrifugal pump impeller sets;
Fig. 7 is the plan view of the utility model embodiment 2 impeller sleeve liners;
Fig. 8 is the front view of the utility model embodiment 2 impeller sleeve liners;
Fig. 9 is the utility model embodiment 3 multistage centrifugal pump impeller sets explosive views;
Figure 10 is the schematic representation of the utility model embodiment 3 axle sleeve structures;
Figure 11 is the plan view of the utility model embodiment 3 axle sleeves;
Figure 12 is the worm's eye view of the utility model embodiment 3 axle sleeves;
Figure 13 is the expansion schematic representation of the utility model embodiment 2 impeller sleeve liners or embodiment's 3 axle sleeve liners.
Description of symbols:
1 guide vane wheel, 11 cover plates
12 lids are along 13 guide vanes
14 guide vane wheel axis holes, 21 stainless steel inner linings
2 impellers, 23 seams
Outer 26 wheel discs of 22 pipe spreaders
25 axis holes, 28 impeller intakes
27 blades, 31 stainless steel inner linings
3 axle sleeves, 33 seams
Outer 35 axis holes of 32 axle sleeve main bodys
34 projectioies
Embodiment
By describing technology contents of the present utility model, structure characteristics in detail, realized purpose and effect, give explanation below in conjunction with mode of execution and conjunction with figs. are detailed.
Embodiment 1
As shown in Figure 1, 2, 3, present embodiment provides a kind of centrifugal pump guide vane wheel 1, comprise guide vane 13 and the stator chamber that overlays on the described guide vane, described stator chamber comprises the guide vane wheel cover plate 11 parallel with guide vane, and the guide vane wheel side edge thereof to the axially extended lid of direction blade along 12, described cover plate 11 and lid are formed in one along 12.Described guide vane wheel is made for the PPO material.Guide vane wheel axis hole 14 is arranged on the guide vane wheel 1, be used for rotating shaft and pass, but do not engage with rotating shaft, so pump when running, guide vane wheel 1 is relative with pump case static.
Embodiment 2
As Fig. 4 to Fig. 8 and shown in Figure 13, described multistage centrifugal pump comprises pump case, impeller 2, guide vane wheel 1, rotating shaft and gland seal device; Have liquid-inlet and liquid outlet on the described pump case, impeller 2 has constituted impeller sets with guide vane wheel 1, each impeller sets stacks an impeller 2 and a guide vane wheel 1 successively, described multistage centrifugal pump has the impeller sets of many groups, impeller sets is positioned at pump case, impeller 2 is provided with axis hole, described impeller 2 is positioned at pump case, described rotating shaft injection pump case, space between airtight pump case of described gland seal device and the rotating shaft, rotating shaft runs through the axis hole 25 of impeller and circumferentially engaging with it, impeller 2 can rotate with rotating shaft, but guide vane wheel 1 do not rotate with rotating shaft, and relative with pump case static, guide vane wheel 1 inside is provided with the fluid passage, and the effect of this fluid passage is the suction port place that the centrifugal liquid that goes out of impeller 2 is imported to next stage impeller 2.
Described guide vane wheel is described guide vane wheel of the embodiment 1.
Have wheel disc 26, blade 27 on the described impeller 2, blade 27 is between two wheel discs 26, wheel disc 26 is circular, to extending pipe spreader, being shaped as of described pipe spreader is cylindrical along impeller shaft at the axis position of wheel disc 26, and the axis position of pipe spreader has the axis hole 25 that runs through, the shape of axis hole makes impeller 2 can circumferentially engage with the centrifugal pump rotating shaft, pipe spreader is outward an impeller intake 28, and liquid can flow on the blade 27 by impeller intake 28, and then is transferred out by centrifugal with blade 27 rotations.Described pipe spreader outer 22 is the PPO material, and internal layer is a stainless steel inner lining 21.Being shaped as of described stainless steel inner lining 21 is cylindrical by the cylindricality behind the pair of parallel planar interception, and the spacing between the described pair of parallel plane is less than described columniform diameter.Stainless steel inner lining 21 is that the butt joint of head and the tail both sides formed after a stainless steel sheets curled, and the both sides engagement of joint stainless steel sheets head and the tail is shown in seam among Fig. 8 23.Such inner lining structure has following advantage:
1. the rotating shaft shape of engaging is easy to processing with it, because columniform axle only needs through simple processing, two planes of pruning can become needed rotating shaft shape;
2. engaging closely is easy to transmission;
3. adopt the form of the first both sides engagement to guarantee the precision that stainless steel sheets curls and processes.
The centrifugal pump shaft sleeve pipe production process that present embodiment provided is as follows: press described shape of leading portion and structure fabrication stainless steel inner lining 21, be specially and process the stainless steel sheets that relative both sides have the engagement shape, as shown in figure 13; It is curled be to place mould to pour into a mould described stainless steel inner lining 21 by the stainless steel inner lining 21 of required form then, at stainless steel inner lining 21 peripheral cast PPO, the described centrifugal pump impeller of formation present embodiment.
Adopting stainless steel is because stainless steel is corrosion-resistant, mechanical strength is high as the material of liner.
To shown in Figure 13, present embodiment provides a kind of multistage centrifugal pump of the embodiment's of use 1 described centrifugal pump guide vane wheel as Fig. 9.
Described multistage centrifugal pump comprises pump case, rotating shaft, impeller 2, guide vane wheel 1, axle sleeve 3 and gland seal device; Have liquid-inlet and liquid outlet on the described pump case, impeller 2, axle sleeve 3 has constituted impeller sets with guide vane wheel 1, each impeller sets stacks an axle sleeve 3 successively, an impeller 2 and a guide vane wheel 1, described multistage centrifugal pump has the impeller sets of many groups, impeller sets is positioned at pump case, impeller 2 axis positions, axle sleeve 3 axis positions and guide vane wheel 1 axis position are provided with axis hole, described rotating shaft injection pump case, space between airtight pump case of described gland seal device and the rotating shaft, rotating shaft runs through the axis hole of impeller 2, the axis hole of axle sleeve 3 and guide vane wheel 1, the axis hole of impeller 2 all engages with rotating shaft with the axis hole of axle sleeve 3, rotate with rotating shaft, but guide vane wheel 1 do not rotate with rotating shaft, and relative with pump case static, guide vane wheel 1 inside is provided with the fluid passage, and the effect of this fluid passage is the suction port place that the centrifugal liquid that goes out of impeller 2 is imported to next stage impeller 2.
The axle sleeve body shape of described axle sleeve is cylindrical, and axle sleeve axis position is provided with the axis hole 35 that axle sleeve and centrifugal pump rotating shaft are circumferentially engaged; Described axle sleeve main body outer 32 is the PPO material, and internal layer is a stainless steel inner lining 31.Being shaped as of described stainless steel inner lining 31 is cylindrical by the cylindricality behind the pair of parallel planar interception, and the spacing between the described pair of parallel plane is less than described columniform diameter.Stainless steel inner lining 31 is that the butt joint of head and the tail both sides formed after a stainless steel sheets curled, and the both sides engagement of joint stainless steel sheets head and the tail is shown in seam among the figure 33.Such inner lining structure has following advantage:
1. the rotating shaft shape of engaging is easy to processing with it, because columniform axle only needs through simple processing, two planes of pruning can become needed rotating shaft shape;
2. engaging closely is easy to transmission;
3. adopt the form of head and the tail both sides engagement to guarantee the precision that stainless steel sheets curls and processes.
Described axle sleeve main body radially outward endways extends and a circle projection 34.The material of projection 34 is identical with the material of lining main body skin 32.
The centrifugal pump axle sleeve production process that present embodiment provided is as follows: press described shape of leading portion and structure fabrication stainless steel inner lining 31, be specially and process the stainless steel sheets that relative both sides have the engagement shape, it curl is the stainless steel inner lining 31 of required form, place mould to pour into a mould described stainless steel inner lining 33 then, at stainless steel inner lining 31 peripheral cast PPO, form the described centrifugal pump axle sleeve of present embodiment.
Adopting stainless steel is because stainless steel is corrosion-resistant, mechanical strength is high as the material of liner.And cheap being convenient to of PPO material processed.
In the present embodiment, spacing between 3 pairs of two adjacent impeller sets of axle sleeve is kept and is played an important role, because the gap between two impeller sets is axle sleeve 3 and separates, so adopt described axle sleeve 3, its end face can be wear-resistant, can improve the rigidity of axle sleeve 3 again, to answer the torsional moment of countershaft.
The above only is embodiment of the present utility model; be not so limit claim of the present utility model; every equivalent structure or equivalent flow process conversion that utilizes the utility model specification and accompanying drawing content to be done; or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present utility model.
Claims (8)
1. a multistage centrifugal pump is taken turns, comprise guide vane and the stator chamber that overlays on the described guide vane, described stator chamber comprises the guide vane wheel cover plate parallel with guide vane, and the guide vane wheel side edge thereof is to the axially extended lid edge of direction blade, it is characterized in that described cover plate is formed in one with the lid edge.
2. multistage centrifugal pump wheel according to claim 1 is characterized in that described guide vane wheel is the PPO guide vane wheel.
3. a multistage centrifugal pump comprises pump case, rotating shaft, impeller, guide vane wheel and gland seal device; Have liquid-inlet and liquid outlet on the described pump case, impeller and guide vane wheel are equipped with axis hole, described impeller and guide vane wheel are positioned at pump case, described rotating shaft injection pump case, space between airtight pump case of described gland seal device and the rotating shaft, rotating shaft runs through impeller and circumferentially engages with the axis hole of guide vane wheel and with impeller, has wheel disc on the described impeller, blade, blade and wheel disc fix, wheel disc is circular, the axis position of wheel disc along impeller shaft to extending pipe spreader, being shaped as of described pipe spreader is cylindrical, the axis position of pipe spreader is the axis hole of described impeller, and described guide vane wheel comprises guide vane and the stator chamber that overlays on the described guide vane, it is characterized in that: described stator chamber comprises the guide vane wheel cover plate parallel with guide vane, and the guide vane wheel side edge thereof is characterized in that to the axially extended lid edge of direction blade described cover plate is formed in one with the lid edge.
4. multistage centrifugal pump according to claim 3 is characterized in that, described pipe spreader comprises internal layer with outer, and skin is a plastic outer layer, and internal layer is the metal internal layer.
5. multistage centrifugal pump according to claim 4, it is characterized in that, described impeller material is the PPO impeller, described internal layer is the stainless steel internal layer, being shaped as of the internal layer of described pipe spreader is cylindrical by the cylindricality behind the pair of parallel planar interception, spacing between the described pair of parallel plane is less than described columniform diameter, and the internal layer of described pipe spreader is that the butt joint of head and the tail both sides formed after a tinsel curled, the both sides engagement of joint tinsel head and the tail.
6. a multistage centrifugal pump comprises pump case, rotating shaft, impeller, axle sleeve, guide vane wheel and gland seal device; Have liquid-inlet and liquid outlet on the described pump case, impeller, axle sleeve and guide vane wheel are equipped with axis hole, described impeller, axle sleeve and guide vane wheel are positioned at pump case, described rotating shaft injection pump case, space between airtight pump case of described gland seal device and the rotating shaft, rotating shaft runs through impeller, axle sleeve circumferentially engages with the axis hole of guide vane wheel and with impeller and axle sleeve, has wheel disc on the described impeller, blade, blade and wheel disc fix, wheel disc is circular, described axle sleeve and impeller are split type, being shaped as of described axle sleeve is cylindrical, the axis position of axle sleeve is the axis hole of described impeller, and described guide vane wheel comprises guide vane and the stator chamber that overlays on the described guide vane, it is characterized in that: described stator chamber comprises the guide vane wheel cover plate parallel with guide vane, and the guide vane wheel side edge thereof is characterized in that to the axially extended lid edge of direction blade described cover plate is formed in one with the lid edge.
7. multistage centrifugal pump according to claim 6 is characterized in that, described axle sleeve comprises internal layer with outer, and skin is a plastic outer layer, and internal layer is the metal internal layer.
8. multistage centrifugal pump according to claim 7, it is characterized in that, described impeller material is the PPO impeller, described internal layer is the stainless steel internal layer, being shaped as of the internal layer of described axle sleeve is cylindrical by the cylindricality behind the pair of parallel planar interception, spacing between the described pair of parallel plane is less than described columniform diameter, and the internal layer of described axle sleeve is that the butt joint of head and the tail both sides formed after a tinsel curled, the both sides engagement of joint tinsel head and the tail.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201280562U CN201661510U (en) | 2010-03-10 | 2010-03-10 | Guide impeller of multistage centrifugal pump and multistage centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201280562U CN201661510U (en) | 2010-03-10 | 2010-03-10 | Guide impeller of multistage centrifugal pump and multistage centrifugal pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201661510U true CN201661510U (en) | 2010-12-01 |
Family
ID=43231927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201280562U Expired - Lifetime CN201661510U (en) | 2010-03-10 | 2010-03-10 | Guide impeller of multistage centrifugal pump and multistage centrifugal pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201661510U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102619780A (en) * | 2012-04-26 | 2012-08-01 | 朱学斌 | Centrifugal pump for balancing axial force of reversely-arranged last-stage impeller |
| CN102628451A (en) * | 2012-04-26 | 2012-08-08 | 朱学斌 | Centrifuge pump with reversely arranged last stage blade for balancing axial force |
| CN102654129A (en) * | 2012-05-19 | 2012-09-05 | 浙江大元泵业有限公司 | Multi-unit shaft well pump |
| KR101647421B1 (en) * | 2016-03-24 | 2016-08-10 | 동원펌프주식회사 | a centrifugal pump of multiple-stage |
-
2010
- 2010-03-10 CN CN2010201280562U patent/CN201661510U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102619780A (en) * | 2012-04-26 | 2012-08-01 | 朱学斌 | Centrifugal pump for balancing axial force of reversely-arranged last-stage impeller |
| CN102628451A (en) * | 2012-04-26 | 2012-08-08 | 朱学斌 | Centrifuge pump with reversely arranged last stage blade for balancing axial force |
| CN102654129A (en) * | 2012-05-19 | 2012-09-05 | 浙江大元泵业有限公司 | Multi-unit shaft well pump |
| KR101647421B1 (en) * | 2016-03-24 | 2016-08-10 | 동원펌프주식회사 | a centrifugal pump of multiple-stage |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201661510U (en) | Guide impeller of multistage centrifugal pump and multistage centrifugal pump | |
| CN108457898A (en) | A kind of blade wheel structure for compressor | |
| CN203685691U (en) | Total-lift double suction pump | |
| CN105275834A (en) | Three-dimensional flow centrifugal blower with low-speed multistage vertical split cylinder structure | |
| KR102347638B1 (en) | Semi-shrouded impeller | |
| CN201661508U (en) | Water retaining ring for multi-stage centrifugal pumps and multi-stage centrifugal pump | |
| US8480351B2 (en) | Compressor unit | |
| CN104632645A (en) | Double inlet multistage centrifugal compressor | |
| JP2016522357A (en) | Centrifugal rotor | |
| CN204419678U (en) | Blower | |
| CN101365882A (en) | Rotor for a rotary machine and a rotary machine | |
| CN206608372U (en) | Noise-reducing peripheral pump | |
| CN202851395U (en) | Mass-flow, low-noise, three-dimensional flow axial double-suction centrifugal type blower | |
| CN204553260U (en) | A kind of bidirection air intake multistage centrifugal compressor | |
| CN201661501U (en) | Multi-stage centrifugal pump shaft sleeve and multi-stage centrifugal pump | |
| CN201757082U (en) | Multistage centrifugal pump impeller and multistage centrifugal pump | |
| CN203146425U (en) | Water pump with fluid director | |
| CN107489643A (en) | Vortex pump impeller | |
| WO2019205771A1 (en) | Impeller for electric fuel pump | |
| CN206636825U (en) | A kind of automobile engine cooling water pump composite impeller | |
| CN106438458A (en) | Closed type and semi-open type mixed impeller structure of centrifugal pump | |
| CN110080999B (en) | Centrifugal blower | |
| CN202789688U (en) | Pump impeller with novel attached blades | |
| CN208982350U (en) | Blade wheel structure for compressor | |
| CN111255748A (en) | Stall-resistant diffuser |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20101201 |
|
| CX01 | Expiry of patent term |