CN202065188U - Vibration reduction and noise reduction device for frequency-conversion single-rotor compressor - Google Patents
Vibration reduction and noise reduction device for frequency-conversion single-rotor compressor Download PDFInfo
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- CN202065188U CN202065188U CN2010206552949U CN201020655294U CN202065188U CN 202065188 U CN202065188 U CN 202065188U CN 2010206552949 U CN2010206552949 U CN 2010206552949U CN 201020655294 U CN201020655294 U CN 201020655294U CN 202065188 U CN202065188 U CN 202065188U
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- rotor
- counterbalance
- frequency conversion
- conversion single
- rotor compressor
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Abstract
The utility model provides a vibration reduction and noise reduction device for a frequency-conversion single-rotor compressor. A balancing piece is additionally arranged on a motor rotor located on a support; the balancing piece is a seal rotating body which is hollow inside and is filled with liquid; and the seal rotating body and the motor rotor are on the same rotating axis. The balancing piece is a ring with a circular ring cavity. The interior of the circular ring cavity is provided with baffles along the radius direction. The number of the baffles is 4N, wherein N is a positive integer. The included angle between any two baffles is equal. The balancing piece is located at the top end of the motor rotor, which deviates from the support. The liquid filled in the balancing piece is viscous liquid. The viscous liquid accounts for 50-70 percent of the hollow size of the balancing piece. The vibration reduction and noise reduction device for the frequency-conversion single-rotor compressor is capable of effectively balancing the centrifugal force of an eccentric crankshaft of the frequency-conversion single-rotor compressor and the centrifugal force of a cylinder refrigerant force acting on the crankshaft, thereby, the vibration and the noise when the compressor runs are reduced, and further, the task performance of a complete machine is improved.
Description
Technical field
The utility model belongs to frequency conversion single-rotor compressor technical field, relates in particular to a kind of frequency conversion single-rotor compressor vibration and noise reducing device.
Background technique
Frequency converting air conditioner is to have selected the frequency conversion dedicated compressor on the basis of common air-conditioning for use; increased frequency-changing control system; it can provide required hot and cold amount automatically according to room availability; after room temperature reaches expected value; air-conditioner host is then can accurately keep the operate at constant speed of this temperature; realize " not shutting down running ", thereby guarantee the stable of ambient temperature.Rotating speed directly has influence on the utilization efficiency of air-conditioning, and frequency variator is exactly the control system that is used for controlling and adjusting compressor rotary speed, makes it to be in all the time best rotating speed state, thereby improves Energy Efficiency Ratio (frequency converting air conditioner is than conventional air conditioner energy saving 20%～30%).Frequency converting air conditioner is being had outstanding performance aspect energy-conservation and the travelling comfort, but finds that when the vibration of compressor noise is tested vibration of compressor is big, level of noise is higher.Studying carefully its main cause is because the barycenter of single-rotor compressor eccentric wheel and rotary piston does not overlap with the main axis rotation center, thereby can produce rotary centrifugal force in the compressor operation process.
The method that tradition is subdued rotary centrifugal force is to adorn a suitable equilibrium block at the opposite direction of eccentric mass, but because single-rotor compressor structure particularity, can't equilibrium block be installed at the opposite direction of eccentric mass, so take other rotatable parts beyond eccentric wheel to add equilibrium block at present, as shown in Figure 1, promptly on rotor, install equilibrium block additional
,
Give balance.
Can set up the power of this power system and the equation of equilibrium of moment is according to mechanics principle:
In the formula,
Be equilibrium block
Rotary centrifugal force,
Be equilibrium block
Rotary centrifugal force,
Be eccentric mass
Rotary centrifugal force,
,
Be respectively equilibrium block
,
Turning radius;
Be eccentric mass
Turning radius;
,
Be respectively
,
Distance
Length.
Can obtain equilibrium block according to equilibrium conditions
,
Value be:
Formula (2) is that present single rotor frequency-changeable compressor is in order to subdue the method that the rotor imbalance is adopted, from this method as can be seen, the single rotor frequency-changeable compressor is not considered the influence of cold media air power countercylinder piston in the actual compressor running at present, thereby caused present single rotor frequency-changeable compressor bigger vibration and noise, limited its minimum operating speed, directly influenced the travelling comfort of air-conditioning; Also limit high workload rotating speed, influenced the performance of air-conditioning fast-refrigerating, heat-production functions.
In order to subdue the uneven shortcoming of frequency conversion single-rotor compressor effectively, at present, adopt the frequency conversion two-spool compressor, 180 ° of symmetrical distributions of two rolling piston, suction and discharge twice, balance rotating inertial force, rotatory inertia moment effectively in each commentaries on classics of compressor, cold media air power particularly, because the dynamic balancing characteristic is good, make compressor to turn round effectively from low speed to high speed, its vibration, noise are all relatively little.But relative frequency conversion single-rotor compressor, its manufacturing process complexity, cost are higher.So seek a kind of frequency conversion single-rotor compressor dynamic balance method of subduing simply and effectively, travelling comfort, the efficiency of frequency converting air conditioner all had great importance.
Summary of the invention
The cold media air power that produces in can't the balance compressor operation by existing equilibrium block at above-mentioned existing frequency conversion single-rotor compressor, thereby cause the vibration of compressor noise bigger, simultaneously rotor unbalance has limited its minimum operating speed and high workload rotating speed, make the travelling comfort and the high energy efficiency of frequency converting air conditioner can not get demonstrating fully deficiencys such as outer machine, the utility model provides a kind of frequency conversion single-rotor compressor vibration and noise reducing device, it is the centrifugal force of balance frequency conversion single-rotor compressor eccentric crankshaft and the centrifugal force that cylinder refrigerant masterpiece is used bent axle effectively, thereby vibration and noise when reducing compressor operating, and then improved the task performance of complete machine.
Technical solution of the present utility model is: a kind of frequency conversion single-rotor compressor vibration and noise reducing device, comprise the counterbalance that is located on the compressor rotor, described counterbalance is to be provided with the sealing solid of rotation that underfill liquid is housed in hollow cavity and the described cavity, and described sealing solid of rotation and described rotor are same axis of rotation.
Described counterbalance is a ring-type, and described cavity is and the annular housing of counterbalance with axis of rotation.
Above-mentioned inside cavity is provided with baffle plate along radial direction.
The quantity of above-mentioned baffle plate is 4N, and wherein N is a positive integer.
Angle between above-mentioned any two adjacent screen equates.
Described counterbalance is positioned at the top of rotor.
The liquid of adorning is viscous liquid in the described counterbalance.
Described viscous liquid accounts for 50% ~ 70% of counterbalance hollow volume.
Described counterbalance is divided into gimbal and following gimbal, and described upper and lower gimbal forms by the welding manner connection.
Described counterbalance upper surface is provided with the liquid hand-hole, its for bore by the through hole that inwardly diminishes greatly, seal ring embeds the heavy caliber portion of described hand-hole, screw is fastened in the described through hole by seal ring.
In the compressor operating process, counterbalance is along with rotor rotates together in the compressor operation process, because the imbalance of compressor rotary-piston distributes and the cold media air masterpiece is used the uneven distribution of rotary-piston, can cause the existence of centrifugal force, and counterbalance suppress to play a part on this centrifugal force very important, in the compressor operating process, fluid meeting automatic stream in the counterbalance chamber and the eccentric relative side of rolling piston load have so just played automatic dynamic balancing effect.
Compare with existing frequency conversion single-rotor compressor rotor static balancing technology, good effect of the present utility model is embodied in:
The first, to compare with present static balancing test, it is " autobalance ".The size and Orientation that its rolling piston is subjected to cold media air power during the operation of frequency conversion single-rotor compressor is along with corner variation and constantly variation, and its rotating inertia force changes; Adopt above-mentioned counterbalance to compare with present static balancing test, it is " autobalance ", does not promptly need to measure in advance the orientation of offset in the eccentric rotor, and liquid can automatically move to the opposing face of offset, plays balanced action; Even even the orientation of offset changes in operation process, described counterbalance also can be automatically balance again, improve the cold media air equilibrium of forces effectively.
The second, reduce the vibration noise of frequency conversion single-rotor compressor effectively.After adopting described counterbalance, it can control the vibration of the housing that uneven refrigeration causes and the pulsation of cold media air power because the torsional oscillation of sense of rotation, reduces the vibration noise of frequency conversion single-rotor compressor effectively.
The 3rd, simple in structure and low cost of manufacture.The annular balance part is the hollow ring of a sealing, and its inner injection is a certain amount of as water, wet goods viscous liquid, and gimbal is in being fixed on the rotor, and it is simple in structure, accuracy of manufacturing is less demanding, cost is low.
The utility model is the centrifugal force of balance frequency conversion single-rotor compressor eccentric crankshaft and the centrifugal force that cylinder refrigerant masterpiece is used bent axle effectively, thus vibration and noise when reducing compressor operating, and then improved the task performance of complete machine.
Description of drawings
Fig. 1 is a frequency conversion single-rotor compressor motor balance schematic representation;
Fig. 2 is the utility model technical solution schematic representation;
Fig. 3 is the utility model counterbalance radial section schematic representation;
Fig. 4 is the utility model counterbalance liquid hand-hole assembling explosive view;
Fig. 5 is the utility model counterbalance axial section schematic representation;
Fig. 6 is counterbalance and frequency conversion single-rotor compressor motor eccentric rotor balance rough schematic view;
Fig. 7 is a balance sysmte mechanical model schematic representation;
Liquid distribution schematic representation during Fig. 8 counterbalance stable state.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described further.
As Fig. 2,3, shown in 4, a kind of frequency conversion single-rotor compressor vibration and noise reducing device, comprise the counterbalance 1 that is located on the compressor rotor 2, it is characterized in that: described counterbalance 1 is for to be provided with the sealing solid of rotation that underfill liquid is housed in hollow cavity 7 and the described cavity 7, and described sealing solid of rotation and described rotor 2 are same axis of rotation.
Described counterbalance 1 is a ring-type, and described cavity 7 is and the annular housing of counterbalance 1 with axis of rotation.
Above-mentioned cavity 7 inside are provided with baffle plate 8 along radial direction.
The quantity of above-mentioned baffle plate 8 is 12.
Angle between above-mentioned any two adjacent screen 8 equates, is 30 degree.
Described counterbalance 1 is positioned at the top of rotor 2.
The liquid of adorning is water, wet goods viscous liquid in the described counterbalance 1.
Described viscous liquid accounts for 50% ~ 70% of counterbalance 1 hollow volume.
Described counterbalance 1 is divided into gimbal 9 and following gimbal 11, and described upper and lower gimbal forms by the welding manner connection.
Described counterbalance 1 is divided into gimbal 9 and following gimbal 11, and described upper and lower gimbal forms by the welding manner connection.1 upper surface is provided with liquid hand-hole 14, its for bore by the through hole that inwardly diminishes greatly, seal ring 13 embeds the heavy caliber portion of described hand-hole 14, screw 12 is fastened in the described through hole by seal ring 13.
As shown in Figure 6, rolling piston eccentric mass on the eccentric rotor 15
With cold media air power equivalent mass
The power sum is an eccentric mass
, its center of mass is
, throw of eccentric is
Equalizing feature 16 is the thin disk of a sealing, and liquid is equipped with in inside, and its outer cover quality is
, liquid quality is
, fluid density is
, counterbalance thickness is
For the purpose of easy analysis, eccentric mass is reduced to a particle that is fixed on the counterbalance
, its quality and throw of eccentric still are
With
, its mechanical model is seen shown in Figure 7.Because the viscous effect of liquid, when Fig. 6, system shown in Figure 7 with
During rotational speed, wherein the rotating speed of liquid will progressively improve, and reach synchronous speed at last.Meanwhile, because the inertial centrifugal force effect, liquid is thrown to balace weight disk outer, the cavity will occur around the balace weight intermediate portion, as shown in Figure 8, and among the figure
,
Be disc centre and position during motion when static,
Be steady-state amplitude,
Be rotational coordinates.Under stable situation, the isostatic surface of liquid determines by inertial centrifugal force, this be one group with gyration center
Be the cylndrical surface at center, comprising the internal surface of liquid.Its pressure is zero, and radius is
, ignore the damping force of disk radial motion, then disk is subjected to following 4 power effects altogether:
1, Zhou elastic restoring force
, its
Be the radial rigidity of axle, this power and
XAxle oppositely;
2, eccentric particle
GCorresponding inertial centrifugal force
3, the eccentric inertial centrifugal force of disk shell
, it and
XAxle in the same way;
4, the eccentric inertial force of liquid
If
, promptly two circles do not cut mutually among Fig. 4, then
With
XThe axle in the same way, in the formula
Be equivalent mass, the liquid quality when it represents the counterbalance filled with fluid.
In above-mentioned 4 power
,
,
All with
XAxle in the same way or oppositely, by the force system in equilibrium principle as can be known:
Also will with
XAxle is reverse, i.e. particle
GMust be positioned at
XOn the axle.If
GPoint is positioned at
During the point left side
For just, otherwise, then have for negative (see figure 8)
With
XAxle in the same way.By the force system in equilibrium equation with
Can get:
Promptly
Order
, wherein
The natural frequency of expression balance sysmte.
Formula (4) is carried out following analysis:
1,
The time, promptly
, substitution formula (4) can get:
This explanation particle G eccentric with
XThe axis bending direction is opposite, and in addition, formula (5) right-hand member is the amplitude that is produced by eccentric rotor merely in quantity, and this explanation counterbalance has played the decay amplitude.
2, when
The time, promptly
, substitution formula (4) can get:
This shows particle
GEccentric identical with the axis bending direction, in like manner can demonstrate,prove, this moment, counterbalance played a part to increase amplitude.
In sum, the application of counterbalance is at a high speed (promptly
) rotating static unbalance rotor.For general dither system, increasing quality or reducing rigidity is the oscillation damping method of using always, and by formula (4) as can be seen, counterbalance makes system increase quality (actual mass just
And equivalent mass
), thereby reach the purpose of vibration damping.
Because the counterbalance shell generally is made up of thin board type lightweight material (plexiglass, plastics etc.), so what play a major role in vibration damping is equivalent mass
The major advantage of counterbalance also is to utilize very little quality
, can obtain very big equivalent mass
The centroid position of liquid and eccentric particle under the high speed stable state
GThe position lay respectively at the disc centre point
The right and left, illustrate that liquid has played balanced action.Just because of this effect, very little liquid quality but can play and the big identical damping effect of equivalent mass.
Counterbalance 1 is as important vibration and noise reducing parts of frequency conversion single-rotor compressor, and running up down at motor, its balance of control plays important effect.Counterbalance 1 generally is made up of the thin board type lightweight material of energy high temperature resistance high pressure, and counterbalance 1 is fixed on the top of compressor rotor 2, and as shown in Figure 5, this device is the hollow ring of a sealing, a certain amount of viscous liquid of its inner injection.The fluid balance ring is divided into gimbal 9 and following gimbal 11, and upper and lower gimbal forms by the welding manner connection, can reduce the gimbal manufacturing step, greatly enhance productivity, simultaneously, upper and lower gimbal adopts and is welded to connect, the seal degree height assembles very convenient.Form the circular cavity 7 of a sealing by upper and lower gimbal, in order better equilibrium liquid effectively to be distributed, make the effect of balance better, these circle ring chamber 7 inside are provided with plate washer 8, baffle plate 8 is arranged on down in the gimbal 11, baffle plate 8 numbers are 12, and the angle between adjacent two baffle plates is 30 °; Baffle plate 8 must have enough intensity, and to guarantee compressor drum in the high speed operation process, the impact that equilibrium liquid produces baffle plate is unlikely to fracture to occur, thereby influences the using effect of model utility.
As shown in Figure 4, at last gimbal 9 upper surfaces liquid hand-hole 14 is set, inlet is a bore through hole from large to small, seal ring 13 that will be corresponding with inlet embeds the heavy caliber portion of inlet, screw 12 is fastened on by seal ring in the through hole of inlet, and the viscosity equilibrium liquid generally accounts for 50% ~ 70% of circle ring chamber 7 volumes.
In the compressor operating process, as Fig. 2, the rotor system positions and fixes by back-up ring 4, because the effect that refrigerant impacts in motor eccentric crankshaft 5 and the cylinder 6, exist (as can be known) that causes centrifugal force according to Newtonian mechanics, because counterbalance 1 is along with rotor rotates together, when counterbalance 1 rotates, because the baffle plate 8 that equidistant equal angles distributes, can make equilibrium liquid in counterbalance 1, realize flowing in order, baffle plate 8 both can carry out regular division to equilibrium liquid, did not influence equilibrium liquid orderly flowing in circle ring chamber 7 again, made equilibrium liquid cut off one of formed space appearance at the branch of baffle plate 8 and divided equally state; When compressor rotor 2 produced eccentric load, fluid meeting automatic stream in counterbalance 1 chamber and the eccentric relative side of load had so just played the automatic deviation correction effect, have reduced whole off-centre, thereby have played the effect to the whole system vibration and noise reducing.
Consider that equilibrium block 3 of the prior art can play balanced action preferably when frequency conversion rotor low-speed running, so can adopt equilibrium block 3 and counterbalance 1(such as Fig. 2 simultaneously in actual applications).
The utility model is the centrifugal force of balance frequency conversion single-rotor compressor eccentric crankshaft and the centrifugal force that cylinder refrigerant masterpiece is used bent axle effectively, thus vibration and noise when reducing compressor operating, and then improved the task performance of complete machine.
Claims (10)
1. frequency conversion single-rotor compressor vibration and noise reducing device, comprise the counterbalance (1) that is located on the compressor rotor (2), it is characterized in that: for to be provided with the sealing solid of rotation that underfill liquid is housed in hollow cavity (7) and the described cavity (7), described sealing solid of rotation and described rotor (2) are same axis of rotation to described counterbalance (1).
2. frequency conversion single-rotor compressor vibration and noise reducing device according to claim 1 is characterized in that: described counterbalance (1) is a ring-type, and described cavity (7) is and the annular housing of counterbalance (1) with axis of rotation.
3. frequency conversion single-rotor compressor vibration and noise reducing device according to claim 2 is characterized in that: described cavity (7) is inner to be provided with baffle plate (8) along radial direction.
4. frequency conversion single-rotor compressor vibration and noise reducing device according to claim 3 is characterized in that: the quantity of described baffle plate (8) is 4N, and wherein N is a positive integer.
5. frequency conversion single-rotor compressor vibration and noise reducing device according to claim 4 is characterized in that: the angle between any two adjacent screen (8) equates.
6. frequency conversion single-rotor compressor vibration and noise reducing device according to claim 1 is characterized in that: described counterbalance (1) is positioned at the top of rotor (2).
7. frequency conversion single-rotor compressor vibration and noise reducing device according to claim 1 is characterized in that: the liquid of adorning is viscous liquid in the described counterbalance (1).
8. frequency conversion single-rotor compressor vibration and noise reducing device according to claim 7 is characterized in that: described viscous liquid accounts for 50% ~ 70% of counterbalance (1) hollow volume.
9. frequency conversion single-rotor compressor vibration and noise reducing device according to claim 1 is characterized in that: described counterbalance (1) is divided into gimbal (9) and following gimbal (11), and described upper and lower gimbal forms by the welding manner connection.
10. according to each described frequency conversion single-rotor compressor vibration and noise reducing device among the claim 1-9, it is characterized in that: described counterbalance (1) upper surface is provided with liquid hand-hole (14), it is that bore is by the through hole that inwardly diminishes greatly, seal ring (13) embeds the heavy caliber portion of described hand-hole (14), and screw (12) is fastened in the described through hole by seal ring (13).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206552949U CN202065188U (en) | 2010-12-13 | 2010-12-13 | Vibration reduction and noise reduction device for frequency-conversion single-rotor compressor |
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|---|---|---|---|
| CN2010206552949U CN202065188U (en) | 2010-12-13 | 2010-12-13 | Vibration reduction and noise reduction device for frequency-conversion single-rotor compressor |
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| CN202065188U true CN202065188U (en) | 2011-12-07 |
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|---|---|---|---|
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102011734A (en) * | 2010-12-13 | 2011-04-13 | 广东美的电器股份有限公司 | Vibration damping and noise reducing device for frequency conversion single-rotor compressor |
-
2010
- 2010-12-13 CN CN2010206552949U patent/CN202065188U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102011734A (en) * | 2010-12-13 | 2011-04-13 | 广东美的电器股份有限公司 | Vibration damping and noise reducing device for frequency conversion single-rotor compressor |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111207 Termination date: 20171213 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |