CN205779720U - A kind of liquid-piston compressor impeller - Google Patents
A kind of liquid-piston compressor impeller Download PDFInfo
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- CN205779720U CN205779720U CN201620514374.XU CN201620514374U CN205779720U CN 205779720 U CN205779720 U CN 205779720U CN 201620514374 U CN201620514374 U CN 201620514374U CN 205779720 U CN205779720 U CN 205779720U
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Abstract
This utility model relates to liquid-piston compressor technical field, specifically disclose a kind of liquid-piston compressor impeller, including wheel hub and be located at the cover plate outside wheel hub, described cover plate includes front shroud and back shroud, lay respectively at the front and rear of described wheel hub, the blade being fixed on wheel hub it is provided with between described front shroud and back shroud, described blade is multiple, it is spacedly distributed on wheel hub outer circumference surface, the zone line on described blade top is provided with reinforcement, described reinforcement is annular, is sequentially connected with each blade.This utility model can reduce blade drive end bottom stress, reduces its fatigue fracture rate, extends impeller service life, is computed, with actually used checking, impeller performance is not resulted in impact.
Description
Technical field
This utility model relates to Compressor Technology field, especially relates to liquid-piston compressor technical field.
Background technology
Light air compressor is the visual plant in photochemical system, belongs to liquid-piston compressor, high to security requirement, in early days
Rely primarily on import.During light air compressor uses, often periodically there is crackle in its impeller, and leaf destruction time serious is led
Cause device stops, and has a strong impact on the properly functioning of photochemical system.The maintenance cost every time caused after impeller failure and production loss
Reach more than million yuan, its enterprise is caused heavy burden.
The damage of phosgene compressor impeller shows that more blades root crackle, root of blade and pump case occurs by higher-pressure region
Occurring local cavitation pit hollow at low-pressure area, time serious, 1～2 leaf destruction comes off, and root of blade and pump case are by high pressure
There is local cavitation pit hollow at low-pressure area in district, and impeller entirety is badly damaged.
Find through analyzing, the working solution ODCB(o-dichlorohenzene in light air compressor) phosgene concentration of dissolving under its operating mode
Higher than suction side saturation solubility, cause the phosgene dissolved in cycle working fluid ODCB to escape in suction side, dissolve in high-pressure side
In turn resulting in the frequent of gas flow in entering compressor to change, the impeller ability to work of actual compressor is bigger than normal, when entering pressure
In contracting machine during tolerance deficiency, producing surge, the precipitation of the phosgene of dissolving also results in cavitation damaged blade.
Technical staff, through being adjusted photochemical system process parameters and improving, never obtains effect, therefore, it is necessary to
Light air compressor is improved.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of liquid-piston compressor impeller, it is possible to reduces blade and drives
End bottom stress, reduces its fatigue fracture rate, extends impeller service life, avoids impacting impeller performance simultaneously.
For solving above-mentioned technical problem, technical solution adopted in the utility model is: a kind of liquid-piston compressor impeller,
Including wheel hub and be located at the cover plate outside wheel hub, described cover plate includes front shroud and back shroud, before laying respectively at described wheel hub
Portion and rear portion, be provided with the blade being fixed on wheel hub between described front shroud and back shroud, described blade is multiple, divides at equal intervals
Being distributed on wheel hub outer circumference surface, the zone line on described blade top is provided with reinforcement, and described reinforcement is annular, connects successively
Connect each blade.
Described reinforcement and blade are integral type, rustless steel cast.
Described reinforcement is annular reinforcing plate.
Described wheel hub is provided with QI KOU, and described QI KOU is between front shroud and back shroud, near blade bottom.
The width of described reinforcement is the 2/3 of width of blade.
Described Rib Thickness is identical with vane thickness.
Described blade is 20.
Use and have the beneficial effects that produced by technique scheme: this utility model is by adding on prior art impeller
The mode of one circle reinforcement, reinforces blade, improves blade antisurging damage capability, work based on liquid-piston compressor
Principle, is arranged on the zone line on blade top by reinforcement, it can be ensured that does not reduce the exhaust capacity of impeller, ensures pressure simultaneously
Two the cavity gas balances split by reinforcement in contracting machine, reduce surge and occur, it is ensured that equipment runs safely and extends and runs
Cycle.Liquid-piston compressor power and rotating shaft thereof will not be impacted by this utility model impeller.
Accompanying drawing explanation
Fig. 1 is that this utility model impeller is along its axial part sectioned view；
Fig. 2 is the position view of reinforcement in this utility model impeller.
Fig. 3 is this utility model impeller fundamental diagram in liquid-piston compressor.
Wherein, 1, wheel hub；2, front shroud；3, back shroud；4, blade；5, reinforcement；6, QI KOU；7, pendular ring；8, compressor
Housing cavity face.
Detailed description of the invention
In order to clearly describe this utility model, new to this practicality with detailed description of the invention below in conjunction with the accompanying drawings
Type is described in further detail.
Provide detailed description below:
Embodiment 1
The present embodiment impeller is transformed based on import AM2500 type light air compressor.This machine blade wheel structure is shown in Fig. 1 and Tu
2, do not include reinforcement 5, including wheel hub 1 be located at the cover plate outside wheel hub 1, cover plate includes front shroud 2 and back shroud 3, respectively
Being positioned at the front and rear of wheel hub 1, be provided with the blade 4 being fixed on wheel hub 1 between front shroud 2 and back shroud 3, blade 4 is 20
Individual, it is spacedly distributed on wheel hub 1 outer circumference surface.
This compressor impeller is in photochemical system is run, and the longest accumulated running time is i.e. to occur for 6 months, the shortest 3 months
Crackle and leaf destruction, it is necessary to maintenance shut-downs, an impeller inlet spare part is replaced maintenance and costs with 1,700,000 yuan.
One, remodeling method
1, carry out blade 4 stress analysis for the modeling of this machine blade wheel structure, set up on this blade wheel structure model simultaneously and add
Strong muscle 5, reinforcement 5 is annular plate, is sequentially connected with each blade 4, and the impeller pattern being provided with reinforcement 5 is three, its reinforcement 5
Position is divided into blade 4 top, bottom and all.Draw from the stress analysis of four models, give the power that blade 4 is identical, add
Muscle rear blade 4 drive end bottom stress is decreased obviously, and at most have dropped 65%, and the probability of its fatigue fracture is substantially reduced.Contrast
Safety coefficient after blade 4 stress: all reinforcement ＞ bottom, reinforcement ＞ top reinforcement ＞ not reinforcements.However, it is contemplated that reinforcement pair
The impact of compressor tolerance, selects to carry out top reinforcement to impeller.Reinforcement position is positioned at impeller blade 4 crown center, and (position is leaned on
Nearly drive end, because blade 4 drive end bottom stress is maximum).
2, the size of reinforcement 5: thickness 10mm, width 100mm.Two chambeies are formed, if Jia Quan influential point of tendons affects two after reinforcement
The balance of individual chamber gas.The foundation of muscle width 100mm: when impeller rotates, due to the effect of centrifugal force, pendular ring 7 is similar to case outlines,
Being close in compressor housing inner cavity surface 8, every half revolution pendular ring 7 is each once toward and away from center of rotation, suction, air vent 6
Between front shroud and back shroud, bottom impeller blade 4, its Breadth Maximum is about the 1/3 of blade 4 width.For ensureing
After reinforcement, should the suction and discharge of conservative control compressor, strengthen the intensity of blade 4 again, blade 4 centre position width 142mm,
Reinforcement 5 width is set to 100mm, accounts for the 2/3 of blade 4 width, otherwise tolerance can be produced considerable influence.Reinforcement 5 thickness is
10mm is identical with blade 4 thickness.
Below, on the impact after this impeller blade 4 reinforcement, performance produced, carry out calculating checking.
1) impact on rate of air sucked in required: owing to reinforcement position is at upper impeller, see Fig. 3, its Leaf 4 width is A, blade 4
The degree of depth in pendular ring is B(i.e. blade 4 centre position width), A/B ≈ 0.65.I.e. added muscle 65%, inside pendular ring 7, adds
Full muscle affects 10/175=5.7%, then, top reinforcement affects 5.7% × (1-0.65)=2%.Consider the accuracy of manufacture, blade 4 shape
The factors such as shape deviation, influence amount is at ＜ 5%.
2) impact on vibration of compressor: owing to reinforcement position is at upper impeller, and two chamber gas balances, to shaking after reinforcement
Move and have little to no effect, vibration severity≤4.5mm/s.
3) impact of countershaft intensity: after reinforcement, impeller increases weight about 7Kg, accounts for about the 3% of impeller gross weight, and two chambeies
Gas balance, so the impact of countershaft intensity is the least.By the torque check diameter of axle:
D >=(5T/ ［ τ ］)1/3
In formula: d: the diameter (mm) of axle at reference section
The nominal torque (N mm) of T: axle transmission
［ τ ］: the allowable shear stress (MPa) of axle
Wherein: T=9550000P/n
In formula: P: the rated power (kW) of axle transmission
The rotating speed (r/min) of n: axle
Known: the power of compressor electric motor: 250kW rotating speed 990r/min
The allowable shear stress ［ τ ］=45 of 630 axles～52, takes ［ τ ］=45
So: d >=(5T/ ［ τ ］)1/3=[(5×9550000/990)×250/45]1/3=64.46
The diameter of axle φ 75 of actual axle, intensity meets requirement.
4) impact on compressor horsepower:
Compressor work rate conversion
The motor used during test is V=380V, 220KW, and working solution is water, surveys Compressor Discharge Pressure 0.16MPaG
Time, electric current is I=305A.
Now, compressor shaft power N=1.732IV η cos φ
Wherein: η electric efficiency.η=0.95
Cos φ motor power factor, cos φ=0.82
Calculate: N=1.732 × 305 × 380 × 0.95 × 0.82=156375W=156.4KW
Compressor actual operating mode: working solution is ODCB, density 1.3, compressor shaft power just becomes with working solution density
Ratio, then compressor shaft power N=156.4 × 1.3=203.3KW.
Motor V=6000V, η=0.95, cos φ=0.82,
Now electric current I=203.3 × 1000/(1.732 × 6000 × 0.95 × 0.82)=25.1A
More than calculate and prove that impeller performance will not be impacted by the transformation of compressor impeller reinforcement.
Two, preparation method
According to aforesaid modification scheme, prepare the present embodiment impeller.Whole impeller includes wheel hub 1, front shroud 2, back shroud
3, blade 4 and reinforcement 5, is shown in Fig. 1 and Fig. 2, uses 316L stainless steel, and integral type pours, and post-treated makes.Casting
Technique is upright casting.
Three, using effect
The present embodiment impeller is installed accumulative use ten months, opens and inspect.Impeller is intact, does not finds that the blade occurred in the past splits
Stricture of vagina and damage phenomenon；Compressor operating electric current 22.4-24.4A, inlet pressure sets 2KPa, and actual pressure is at 0.78-3.5KPa
Between normal fluctuation, field equipment data monitoring shake value and noise are stably normal, are interrupted and cavitation sound occur.
Prophyll wheel with improvement after the present embodiment impeller wheel portion operation conditions, parameter comparison as follows.
Employing the present embodiment impeller following beneficial effect of acquisition:
1, eliminate compressor impeller and damage the potential safety hazard brought.
2, compressor uses the needs that can meet normal production in the impeller ability improved.
3, avoiding device is because of compressor fault parking maintenance.
4, economic benefit is obtained:
(1), before problem is unresolved, compressor needs the most at least to check twice, and each maintenance all needs device to stop, according to mesh
Front device load, every annual meeting causes TDI production loss 200.2 tons (TDI price 11700 yuan/ton), and compression is only overhauled in each parking
One project of machine, dismounts compressor；The costs of overhaul such as pipeline 30,000 yuan.Cause simultaneously and additionally open Parking Fee, consumption of raw materials.Start-stop
Car also can cause system to run fluctuation, affects device stable operation.After Resolving probiems, TDI production loss, the cost of overhaul can be avoided
With, extra every consumption costs, device long-period stable operation simultaneously, it is beneficial to optimize and revise every technic index, reduces and produce
Consume.
(2) save spare part expense and repair impeller expense.Use repairing damaged impeller after impeller failure or change new impeller
Mode, buying state out rotor spare part expense is 1,700,000 yuan (price including taxs), and after application the present embodiment impeller, this expense is the most not
Occurring, even if procurement of replacement parts, the present embodiment impeller price is only 300,000 yuan (price including taxs) again.
(3) electric energy is saved.4.6A is averagely declined before compressor operating current ratio, by annual after currently used improvement impeller
Running calculating in 350 days, year can power cost saving 26.6 ten thousand yuan (only this appropriate litigation fees is in the present embodiment impeller price).
Comprehensive the above, can realize direct economic benefit 433.8 ten thousand yuan every year.
Above this utility model is described in detail, this utility model is applied specific case to of the present utility model
Embodiment is set forth, and the explanation of above example is only intended to help and understands this utility model, it is noted that for this
For those skilled in the art, on the premise of without departing from this utility model principle, if also this utility model can be carried out
Dry improvement, these improvement also fall in this utility model scope of the claims.
Claims (7)
1. a liquid-piston compressor impeller, including wheel hub (1) and be located at wheel hub (1) outside cover plate, before described cover plate includes
Cover plate (2) and back shroud (3), lay respectively at the front and rear of described wheel hub (1), described front shroud (2) and back shroud (3) it
Between be provided with the blade (4) being fixed on wheel hub (1), described blade (4) is multiple, is spacedly distributed in wheel hub (1) outer circumference surface
On, it is characterised in that: the zone line on described blade (4) top is provided with reinforcement (5), and described reinforcement (5) is annular, depends on
The each blade of secondary connection (4).
A kind of liquid-piston compressor impeller the most according to claim 1, it is characterised in that described reinforcement (5) and blade
(4) it is integral type, rustless steel casts.
A kind of liquid-piston compressor impeller the most according to claim 1, it is characterised in that described reinforcement (5) is annulus
Shape reinforcing plate.
A kind of liquid-piston compressor impeller the most according to claim 1, it is characterised in that described wheel hub (1) is provided with gas
Mouth (6), described QI KOU (6) is positioned between front shroud (2) and back shroud (3), near blade (4) bottom.
A kind of liquid-piston compressor impeller the most according to claim 1, it is characterised in that the width of described reinforcement (5)
For blade (4) width 2/3.
A kind of liquid-piston compressor impeller the most according to claim 1, it is characterised in that described reinforcement (5) thickness with
Blade (4) thickness is identical.
A kind of liquid-piston compressor impeller the most according to claim 1, it is characterised in that described blade (4) is 20.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620514374.XU CN205779720U (en) | 2016-05-31 | 2016-05-31 | A kind of liquid-piston compressor impeller |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620514374.XU CN205779720U (en) | 2016-05-31 | 2016-05-31 | A kind of liquid-piston compressor impeller |
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| CN205779720U true CN205779720U (en) | 2016-12-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108175277A (en) * | 2018-03-02 | 2018-06-19 | 宁波三A集团电器有限公司 | Foam device |
-
2016
- 2016-05-31 CN CN201620514374.XU patent/CN205779720U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108175277A (en) * | 2018-03-02 | 2018-06-19 | 宁波三A集团电器有限公司 | Foam device |
| CN108175277B (en) * | 2018-03-02 | 2023-09-26 | 宁波三A集团电器有限公司 | Foaming device |
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