CN110529383A - A kind of multistage pump Flow vibration inhibition device - Google Patents
A kind of multistage pump Flow vibration inhibition device Download PDFInfo
- Publication number
- CN110529383A CN110529383A CN201910958091.2A CN201910958091A CN110529383A CN 110529383 A CN110529383 A CN 110529383A CN 201910958091 A CN201910958091 A CN 201910958091A CN 110529383 A CN110529383 A CN 110529383A
- Authority
- CN
- China
- Prior art keywords
- guide vane
- final stage
- impeller
- multistage pump
- gland
- 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.)
- Pending
Links
- 230000005764 inhibitory process Effects 0.000 title abstract description 3
- 210000004907 gland Anatomy 0.000 claims abstract description 43
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 238000005086 pumping Methods 0.000 claims description 10
- 230000008676 import Effects 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 230000029142 excretion Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 239000012530 fluid Substances 0.000 abstract description 11
- 239000007788 liquid Substances 0.000 abstract description 5
- 239000012141 concentrate Substances 0.000 abstract description 3
- 230000009466 transformation Effects 0.000 description 8
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- 238000005266 casting Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000010349 pulsation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 125000000383 tetramethylene group Chemical group [H]C([H])([*:1])C([H])([H])C([H])([H])C([H])([H])[*:2] 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D1/06—Multi-stage pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/445—Fluid-guiding means, e.g. diffusers especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/669—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for liquid pumps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The present invention discloses a kind of multistage pump Flow vibration inhibition device.It is that will export on gland inner wall to offer annular channel that multistage pump Flow vibration of the present invention, which inhibits the structure of device,.Pump case middle section and final stage guide vane are fixed on pump case bearing part high-pressure fluid to the impact force of pump case by bolt by structure of the invention, it offers annular channel on outlet gland inner wall flowing liquid pressure is brought out to high pressure and redistribute, further balance radial force, the high-frequency vibration of high-energy fluid is converted into low-frequency vibration, and it will measure and concentrate on being fixed on the outlet gland on pump case, to reduce the vibration of multi-stage pump rotor, the stability of multistage pump operation is improved.
Description
Technical field
The invention belongs to be centrifuged pump technical field, Double-casing multi-stage centrifugal pump under especially a kind of high temperature, high pressure operating condition,
Specifically a kind of multistage pump Flow vibration inhibits device.
Background technique
For sectional type multi-stage pump because compact-sized, the geomery of each middle section (and guide vane) is all identical convenient for quilt the features such as casting
It is widely used in the fields such as petrochemical industry, agricultural, mining industry.The pumping chamber of sectional type multi-stage pump is typically all guide-vane, guide vane type pressure
Theoretically radial force is smaller for water chamber, but due to the presence of water exit end, can generate certain radial force；And multistage pump final stage fluid has
There is higher energy head, the dither of final stage guide vane outlet directly affects the ripple frequency of entire impeller.In asymmetric radial direction
Under power and the combined influence of high-energy fluid pulsation, multistage pump can generate larger vibration and noise.Therefore, weaken the outlet of final stage guide vane
The dither of high-energy fluid and the method for finding balance high-energy fluid radial force are to reduce multistage pump vibration and noise to have
Effect approach.
Summary of the invention
It is an object of the invention to propose that a kind of multistage pump Flow vibration inhibits device.Multistage pump stream of the present invention causes vibration
The dynamic structure for inhibiting device is that will export to offer annular channel on gland inner wall, and structure of the invention passes through bolt for pump case middle section
It is fixed on bearing part high-pressure fluid on pump case with final stage guide vane the impact force of pump case is exported and offers annular on gland inner wall
Runner brings out flowing liquid pressure to high pressure and redistributes, and further balances radial force, and the high-frequency vibration of high-energy fluid is converted to
Low-frequency vibration, and will measure and concentrate on being fixed on the outlet gland on pump case, to reduce the vibration of multi-stage pump rotor, improve
The stability of multistage pump operation.
To achieve the above object, a kind of multistage pump Flow vibration of the present invention inhibits device, including centrifugal multistage pump multiple centrifugal pump, main
It to be made of impeller sets, guide vane group, guide vane outlet gland group, axis；Impeller sets are fixed with axis, are rotated with the axis；
Guide vane group exit installs guide vane and exports gland group, and the diameter of impeller sets is close in guide vane outlet gland group
Diameter；
The impeller sets include first stage impeller, secondary impeller, impeller, the first stage impeller, secondary impeller, final stage leaf
Wheel is sequentially fixed at together；
The guide vane group includes first-level guide blade, secondary guide vane, final stage guide vane；
The final stage guide vane exit installation outlet gland of the centrifugal multistage pump multiple centrifugal pump offers ring on the outlet gland inner wall
Shape runner, the annular channel are the cylindrical type conduit of radially uniform setting；The outlet gland is connected to pumping chamber.
The number of blade of the impeller and the number of blade of final stage guide vane meet relatively prime principle.
The number of blade n of the final stage guide vane2=2n1- 1, n1For the number of blade of impeller.
The final stage vane inlet laying angle presses formulaThe final stage vane inlet peace
Putting angle outlet laying angle is β3=(16-19) β2；
Wherein: Vm2Indicate the axis plane velocity at final stage vane inlet,QtIndicate the stream by final stage guide vane
Amount, F02Indicate the discharge section area in final stage guide vane exit, ψ2Indicate excretion coefficient；u2Indicate the circle at final stage vane inlet
Circular velocity,V2Indicate the absolute velocity in impeller exit, D2Indicate the diameter of final stage vane inlet；α2Table
Show the peripheral speed in impeller exit and the angle of absolute velocity.
The cylindrical type conduit, slot diameter aren3For cylindrical type conduit number, n3=3n2。
Gap b between the outlet gland and final stage guide vane outlet base circle diameter (BCD)1For 1-2mm.
The pumping chamber is that symmetric form presses water cavity, and the symmetric form pressure water cavity is radially symmetrical, and the symmetric form presses water cavity
It is used cooperatively with outlet gland.
A kind of multistage pump Flow vibration of the present invention inhibits device, beneficial effect be: the present invention is effectively reduced
The high frequency pressure pulsations of final stage high-energy fluid make final stage high pressure bring out stream fluid and are radially evenly distributed with, reduce the radial force of high-voltage end；
The annular channel opened up on outlet gland is cylinder, convenient for casting, being easy to polish, avoids generating due to casting flaw stifled
Plug；Outlet gland is connect by bolt with pump case, asymmetric caused vibration is transmitted on pump case by outlet gland, significantly
The vibration frequency for reducing rotor, increases the stability of pump operation；Multistage pump vibration and noise is effectively reduced in vibration frequency reduction, and
It is easy to process, service life is longer.
Detailed description of the invention
Fig. 1 is schematic structural view of the invention；
Fig. 2 is final stage guide vane and outlet gland structure schematic diagram；
Fig. 3 is that the vibration parameters table of front and back bearings is transformed in the oscillating column pump of horizontal direction；
Fig. 4 is that the vibration parameters table of front and back bearings is transformed in the oscillating column pump of vertical direction；
Fig. 5 is that the vibration parameters table of front and back bearings is transformed in the oscillating column pump of axial direction；
In figure: 1- first stage impeller, 2- secondary impeller, 3- grade guide vane, 4- final stage guide vane, 5- pump case middle section, the outlet 6- pressure
Lid, 7- balancing drum, 8- pump inlet, 9- pumping chamber, 10- impeller, 11- pump case.
Specific embodiment
Embodiment 1
As shown in Figure 1, 2, a kind of multistage pump Flow vibration of the present invention inhibits device, including centrifugal multistage pump multiple centrifugal pump, mainly
It is made of impeller sets, guide vane group, guide vane outlet gland group, axis；Impeller sets are fixed with axis, are rotated with the axis；
Guide vane group exit installs guide vane and exports gland group, and the diameter of impeller sets is close in guide vane outlet gland group
Diameter；
The impeller sets include first stage impeller 1, secondary impeller 2, impeller 10, the first stage impeller 1, secondary impeller 2,
Impeller 10 is sequentially fixed at together；
The guide vane group includes first-level guide blade, secondary guide vane 3, final stage guide vane 4；
The 4 exit installation outlet gland 6 of final stage guide vane of the centrifugal multistage pump multiple centrifugal pump opens up on 6 inner wall of outlet gland
There is annular channel, the annular channel is the cylindrical type conduit of radially uniform setting；The outlet gland 6 is connected to pumping chamber 9.
The number of blade of the impeller 10 and the number of blade of final stage guide vane 4 meet relatively prime principle.
The number of blade n of the final stage guide vane 42=2n1- 1, n1For the number of blade of impeller 10.
The 4 import laying angle of final stage guide vane presses formula4 import of final stage guide vane
It is β that laying angle, which exports laying angle,3=(16-19) β2；
Wherein: Vm2Indicate the axis plane velocity of 4 entrance of final stage guide vane,QtIt indicates through final stage guide vane 4
Flow, F02Indicate the discharge section area in 4 exit of final stage guide vane, ψ2Indicate excretion coefficient；u2Indicate 4 entrance of final stage guide vane
Peripheral speed,V2Indicate the absolute velocity in 10 exit of impeller, D2Indicate the straight of 4 import of final stage guide vane
Diameter；α2Indicate the peripheral speed in 10 exit of impeller and the angle of absolute velocity.
The cylindrical type conduit, slot diameter aren3For cylindrical type conduit number, n3=3n2。
The outlet gland 6 and final stage guide vane 4 export the gap b between base circle diameter (BCD)1For 1-2mm.
The pumping chamber 9 is that symmetric form presses water cavity, and the symmetric form pressure water cavity is radially symmetrical, and the symmetric form presses water cavity
It is used cooperatively with outlet gland 6.
When use；The pump inlet 8 that liquid is arranged out of pump case 11 enters, and is pumped into outlet gland by guide vanes at different levels, impeller
6, in pumping chamber 9, balancing drum 7 is run when pumping liquid, is exported and is offered annular channel, the annular channel on 6 inner wall of gland
For the cylindrical type conduit of radially uniform setting, shown cylindrical type conduit complex equilibrium drum 7 reduces vibration；Final stage guide vane 4 passes through weldering
It connects and is fixed on outlet gland 6, gland 6 is fixed on pump case 11 along axial through bore by stud and nut in outlet.
As shown in Fig. 2, 4 number of blade n of final stage guide vane2=2n1- 1, n1For the impeller number of blade；Outlet 6 aperture of gland isn3For cylindrical type duct number, n3=3n2。F02Indicate the discharge section area in final stage guide vane exit.Export gland
With the gap b between final stage guide vane outlet base circle diameter (BCD)1For 1-2mm.
Embodiment 2
Item source: Lanzhou auxiliary reagent factory, petro-chemical corporation methyl ethyl ketone plant P101B pump, design medium are butylene；Use Ji
Safe portable TV200 vialog measures amplitude range；
As shown in Figs. 1-5, a kind of multistage pump Flow vibration of the present invention inhibits device, such as embodiment 1,
The 4 import laying angle of final stage guide vane: 15 °；Outlet laying angle: 11 °；The final stage guide vane number of blade: 10；
The cylindrical type conduit n3For cylindrical type conduit number, n3=24.
The outlet gland 6 and final stage lead the gap b between 4 outlet base circle diameter (BCD)s1For 1mm.
Test data is as in Figure 3-5:
(a) vibration of horizontal direction: fore bearing vibration is in 0.15-0.17 after pump transformation；Rear bearing vibration exists after pump transformation
0.13-0.14；Fore bearing vibration is in 0.25-0.27 before pump is transformed；Pump transformation front and back bearings vibration is in 0.19-0.20.
(b) vibration of vertical direction: fore bearing vibration is in 0.06-0.07 after pump transformation；Rear bearing vibration exists after pump transformation
0.07-0.09；Fore bearing vibration is in 0.20-0.21 before pump is transformed；Pump transformation front and back bearings vibration is in 0.10-0.11.
(c) axial square to vibration: pump transformation after fore bearing vibrate 0.08；Rear bearing vibration exists after pump transformation
0.06-0.07；Fore bearing vibration is in 0.07-0.08 before pump is transformed；Fore bearing vibration is in 0.06-0.07 before pump is transformed.
Annular channel is offered on outlet gland inner wall in the present apparatus flowing liquid pressure is brought out to high pressure redistribute, into
One step balances radial force, the high-frequency vibration of high-energy fluid is converted to low-frequency vibration, and will measure and concentrate on being fixed on pump case
Outlet gland on, to reduce the vibration of multi-stage pump rotor, improve the stability of multistage pump operation.
Claims (7)
1. a kind of multistage pump Flow vibration inhibits device, including centrifugal multistage pump multiple centrifugal pump, it is characterised in that: mainly by impeller sets, guide vane
Group, guide vane outlet gland group, axis composition；Impeller sets are fixed with axis, are rotated with the axis；
Guide vane group exit installs guide vane and exports gland group, and the diameter of impeller sets exports the internal diameter of gland group close to guide vane；
The impeller sets include first stage impeller (1), secondary impeller (2), impeller (10), the first stage impeller (1), secondary leaf
Wheel (2), impeller (10) are sequentially fixed at together；
The guide vane group includes first-level guide blade, secondary guide vane (3), final stage guide vane (4)；
Final stage guide vane (4) exit installation outlet gland (6) of the centrifugal multistage pump multiple centrifugal pump is opened on outlet gland (6) inner wall
Equipped with annular channel, the annular channel is the cylindrical type conduit of radially uniform setting；The outlet gland (6) is connected to pumping chamber
(9)。
2. a kind of multistage pump Flow vibration inhibits device as described in claim 1, it is characterised in that: the impeller (10)
The number of blade and the number of blade of final stage guide vane (4) meet relatively prime principle.
3. a kind of multistage pump Flow vibration inhibits device as described in claim 1, it is characterised in that: the final stage guide vane (4)
Number of blade n2=2n1- 1, n1For the number of blade of impeller (10).
4. a kind of multistage pump Flow vibration inhibits device as described in claim 1, it is characterised in that: the final stage guide vane (4) into
Mouth laying angle presses formulaFinal stage guide vane (4) import laying angle outlet laying angle is β3
=(16-19) β2；
Wherein: Vm2Indicate the axis plane velocity of final stage guide vane (4) entrance,QtIt indicates through final stage guide vane (4)
Flow, F02Indicate the discharge section area in final stage guide vane (4) exit, ψ2Indicate excretion coefficient；u2Indicate final stage guide vane (4) into
Peripheral speed at mouthful,V2Indicate the absolute velocity in impeller (10) exit, D2It indicates final stage guide vane (4)
The diameter of import；α2Indicate the peripheral speed in impeller (10) exit and the angle of absolute velocity.
5. a kind of multistage pump Flow vibration inhibits device as described in claim 1, it is characterised in that: the cylindrical type conduit,
Slot diameter isn3For cylindrical type conduit number, n3=3n2。
6. a kind of multistage pump Flow vibration inhibits device as described in claim 1, it is characterised in that: the outlet gland (6) and
Final stage guide vane (4) exports the gap b between base circle diameter (BCD)1For 1-2mm.
7. a kind of multistage pump Flow vibration inhibits device as described in claim 1, it is characterised in that: the pumping chamber (9) is pair
Title type presses water cavity, and the symmetric form pressure water cavity is radially symmetrical, and the symmetric form pressure water cavity is used cooperatively with outlet gland (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910958091.2A CN110529383A (en) | 2019-10-10 | 2019-10-10 | A kind of multistage pump Flow vibration inhibition device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910958091.2A CN110529383A (en) | 2019-10-10 | 2019-10-10 | A kind of multistage pump Flow vibration inhibition device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110529383A true CN110529383A (en) | 2019-12-03 |
Family
ID=68671578
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910958091.2A Pending CN110529383A (en) | 2019-10-10 | 2019-10-10 | A kind of multistage pump Flow vibration inhibition device |
Country Status (1)
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2252256Y (en) * | 1995-09-14 | 1997-04-16 | 沈阳市新科达石化高压泵厂 | Sectional type multistage pump |
| CN101509490A (en) * | 2009-04-03 | 2009-08-19 | 湖北三峡泵业有限公司 | Axial force self-balancing multiple stage centrifugal pump |
| CN101892991A (en) * | 2010-07-28 | 2010-11-24 | 上海悦澜泵业制造有限公司 | Horizontal type multi-stage pump without leakage |
| CN202250886U (en) * | 2011-09-26 | 2012-05-30 | 大连深蓝泵业有限公司 | Dual-drum self-balancing sectional type multi-stage pump |
| CN102619780A (en) * | 2012-04-26 | 2012-08-01 | 朱学斌 | Centrifugal pump for balancing axial force of reversely-arranged last-stage impeller |
| CN103195743A (en) * | 2013-04-09 | 2013-07-10 | 江苏大学 | Back-to-back diversion structure |
| RU2600662C1 (en) * | 2015-09-17 | 2016-10-27 | Общество с ограниченной ответственностью "Нефтекамский машиностроительный завод" (ООО "НКМЗ") | Horizontal multistage sectional centrifugal pump unit |
| CN205918649U (en) * | 2016-08-29 | 2017-02-01 | 重庆水泵厂有限责任公司 | Multistage water segment structure that pumps of radially split type axial force self -balancing double -shell |
| CN106762676A (en) * | 2016-12-29 | 2017-05-31 | 西安航天泵业有限公司 | A kind of centrifugal multistage pump multiple centrifugal pump delivery chamber |
| CN210637242U (en) * | 2019-10-10 | 2020-05-29 | 兰州理工大学 | Multistage pump flow-induced vibration suppression device |
-
2019
- 2019-10-10 CN CN201910958091.2A patent/CN110529383A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2252256Y (en) * | 1995-09-14 | 1997-04-16 | 沈阳市新科达石化高压泵厂 | Sectional type multistage pump |
| CN101509490A (en) * | 2009-04-03 | 2009-08-19 | 湖北三峡泵业有限公司 | Axial force self-balancing multiple stage centrifugal pump |
| CN101892991A (en) * | 2010-07-28 | 2010-11-24 | 上海悦澜泵业制造有限公司 | Horizontal type multi-stage pump without leakage |
| CN202250886U (en) * | 2011-09-26 | 2012-05-30 | 大连深蓝泵业有限公司 | Dual-drum self-balancing sectional type multi-stage pump |
| CN102619780A (en) * | 2012-04-26 | 2012-08-01 | 朱学斌 | Centrifugal pump for balancing axial force of reversely-arranged last-stage impeller |
| CN103195743A (en) * | 2013-04-09 | 2013-07-10 | 江苏大学 | Back-to-back diversion structure |
| RU2600662C1 (en) * | 2015-09-17 | 2016-10-27 | Общество с ограниченной ответственностью "Нефтекамский машиностроительный завод" (ООО "НКМЗ") | Horizontal multistage sectional centrifugal pump unit |
| CN205918649U (en) * | 2016-08-29 | 2017-02-01 | 重庆水泵厂有限责任公司 | Multistage water segment structure that pumps of radially split type axial force self -balancing double -shell |
| CN106762676A (en) * | 2016-12-29 | 2017-05-31 | 西安航天泵业有限公司 | A kind of centrifugal multistage pump multiple centrifugal pump delivery chamber |
| CN210637242U (en) * | 2019-10-10 | 2020-05-29 | 兰州理工大学 | Multistage pump flow-induced vibration suppression device |
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