CN220869730U - Split retainer ring and fan using same - Google Patents
Split retainer ring and fan using same Download PDFInfo
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- CN220869730U CN220869730U CN202322335075.2U CN202322335075U CN220869730U CN 220869730 U CN220869730 U CN 220869730U CN 202322335075 U CN202322335075 U CN 202322335075U CN 220869730 U CN220869730 U CN 220869730U
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- wind wheel
- motor
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- 239000013013 elastic material Substances 0.000 claims abstract description 22
- 238000013016 damping Methods 0.000 claims abstract description 16
- 238000004080 punching Methods 0.000 claims abstract description 3
- 239000004033 plastic Substances 0.000 claims description 24
- 238000009413 insulation Methods 0.000 claims description 6
- 238000004804 winding Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 238000004806 packaging method and process Methods 0.000 claims 1
- 239000012530 fluid Substances 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000013461 design Methods 0.000 description 6
- 238000002955 isolation Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
The utility model discloses an opening check ring and a fan using the same, wherein the opening check ring comprises a check ring body (1), a concave groove (10) which is concave downwards is arranged on the top surface (11) of the check ring body (1), and an elastic material (2) with large damping is poured into the concave groove (10); the groove (10) is formed by punching, and an annular raised surrounding edge (12) is formed around the groove (10); the axial height H1 of the elastic material (2) is higher than the axial height H2 of the groove (10), so that the elastic material (2) is partially exposed outside the groove (10), the structure integrates the retainer ring body and the elastic material into a whole without additionally adding a damping ring, load noise generated by axial resonance can be effectively solved, and the structure can be produced in a large scale at low cost, and has unique advantages in terms of cost and reliability.
Description
Technical Field
The utility model relates to a split retaining ring and a fan using the split retaining ring.
Background
The load of the air conditioner outside machine seen daily mainly comprises a box body (comprising a compressor and the like), a motor, fan blades and the like. The motor is arranged on a bracket in the box body, the fan blades are arranged at the shaft extension end of the motor, the fan blades limit the axial displacement of the wind wheel through the split washer and the fastening nut, and the structure is equal to a cantilever beam structure when the wind wheel is stationary, as shown in fig. 1 and 2.
The outer contour of the fan blade of the outer machine of the air conditioner is larger, the mass is unbalanced and the inner diameter of the mounting hole is small, so that the shaft diameter of the motor rotating shaft matched with the outer machine is small, the shaft extension length is long, the vertical direction stress of the shaft extension end of the motor rotating shaft is large, the circumferential stress of the motor is uneven, and the balance of the motor rotor is poor due to the design and manufacturing defects of blade profile, air duct design, dynamic unbalance of the wind wheel and the like, and the practice proves that the mechanical unbalance of the rotor can generate remarkable vibration.
The rotor balance difference causes the motor vibration amplitude to be too high, and then the motor stator-rotor air gap is uneven, so that the motor electromagnetic force is larger, the vibration is further aggravated, especially the axial vibration is prominent, at the moment, the exciting force is too large to excite the natural frequency of certain parts, and resonance noise is generated.
As shown in fig. 3, the fan blade is mounted at the extending end of the motor shaft, and the axial displacement of the fan blade is restrained by the split retaining ring and the fastening nut. The motor starts to drive the fan blades to rotate, the fan blades push air to flow in the same direction as the shaft, namely wind is discharged after passing through the motor and the fan blades in sequence, the working principle of the fan blades of the external machine is that fluid flows into the blade channels along the axial direction, when the impeller rotates under the driving of the motor, the rotating fan blades give axial thrust to the flowing fluid (when the fluid in the fan blades flows around the fan blades, according to the fluid mechanics principle, the fluid acts on the fan blades to have a lifting force, and meanwhile, the fan blades also act on the fluid to have a force with the same magnitude and opposite direction as the lifting force, namely the thrust), the thrust of the fan blades does work on the fluid, so that the energy of the fluid is increased and is discharged along the axial direction.
Moreover, the swing of the rotating fan blade is larger due to design and process defects such as uneven blade shape, blade number and mass distribution, larger axial force is generated to act on the motor rotor through the split retaining ring, electromagnetic force is influenced, the axial vibration of the motor is aggravated, and resonance noise is generated.
As shown in fig. 4, the load of a certain air conditioner generates 30-order noise, the axial vibration coloemap chart and the noise coloemap chart are compared, and the 30-order axial vibration and the noise slice are comprehensively analyzed, so that it is confirmed that strong resonance occurs in the axial direction of the motor, and the 5-order harmonic electromagnetic force of the motor is larger in the resonance interval, namely, the structural resonance and the electromagnetic resonance act together to generate the noise. (the test motor of the air conditioner external unit is a 10-pole DC motor)
To attenuate this resonance noise, a rubber vibration isolation gasket is typically added between the fan blade and the circlip. The rubber damping is larger, so that the vibration amplitude during resonance is reduced, and the vibration energy is greatly prevented from being transmitted along the axial direction, so that the axial resonance amplitude is rapidly reduced or even eliminated, and the problem of vibration noise is well solved.
As shown in fig. 5 and 6, after the rubber vibration isolator is added between the fan blade and the split ring, the resonance rotating speed interval is 650-830 rpm, the vibration is reduced by 0.12gRMS, the noise is reduced by approximately 8dB (A) RMS, the subjective noise evaluation of the aural hearing is carried out, and the noise is obviously improved.
As shown in fig. 7, a rubber vibration isolator ring is added between the split ring and the fan blade, a part is added in the design scheme, the rubber ring is completely exposed in a complex outdoor environment and is influenced by oil resistance, heat resistance, aging resistance, corrosion resistance and other aspects of rubber materials, and when the air conditioner outdoor unit runs for a long time, the rubber ring is easy to age, crack and fall off, and finally load noise is reproduced.
However, due to the influences of oil resistance, heat resistance, ageing resistance, corrosion resistance and the like of rubber materials, most air conditioner manufacturers cannot accept that a rubber vibration isolation gasket is added between an opening check ring and fan blades, an air conditioner outdoor unit runs for a long time and outdoor environment is severe, the rubber check ring is easy to age, crack and fall, and finally load noise is reproduced, so that part of motor manufacturers adopt damping rotors to solve the axial resonance problem, but the design scheme has high cost and low production efficiency, cannot meet the requirement of mass production, and a motor with overlarge torsion is not suitable for the motor.
Disclosure of Invention
The utility model aims to provide a split retainer ring and a fan using the split retainer ring, and solve the technical problems that most air conditioner manufacturers cannot accept adding a rubber vibration isolation gasket between the split retainer ring and fan blades in the prior art, an air conditioner outdoor unit runs for a long time and outdoor environment is severe, the rubber retainer ring is easy to age, crack and fall to finally cause load noise reproduction, so that part of motor manufacturers adopt damping rotors to solve the axial resonance problem, but the design scheme has high cost and low production efficiency, cannot meet the requirement of mass production, and a motor with overlarge torsion is not applicable.
The technical scheme of the utility model is realized as follows:
The utility model provides a split retaining ring, which is characterized in that: the damping device comprises a retainer ring body, wherein a downward concave groove is formed in the top surface of the retainer ring body, and elastic materials with large damping are poured into the groove.
The grooves are formed by stamping, and annular raised surrounding edges are formed around the grooves.
The axial height H1 of the elastic material is higher than the axial height H2 of the groove, so that the elastic material is partially exposed outside the groove.
The elastic material is a rubber material.
The utility model provides a fan, includes motor and wind wheel, and the motor includes the pivot, and the pivot includes the axle and stretches the end, and the wind wheel is installed on the axle and stretches the end, installs split washer on the axle and stretches the end, and the bottom of wind wheel supports on the split washer, and the wind wheel other end nut locks, through the end locking connection of nut and axle stretch the end, locks wind wheel in the pivot, its characterized in that: the split retaining ring is the split retaining ring, and the bottom end of the wind wheel is propped against the elastic material on the top surface of the retaining ring body.
The motor further comprises a plastic package stator, a rotor assembly and an end cover, wherein the plastic package stator is sleeved outside the rotor assembly, the rotor assembly is sleeved outside the rotating shaft, the plastic package stator comprises a plastic package body, a stator core, end insulation and a coil winding, the plastic package body is used for plastic package of the stator core, the end insulation and the coil winding into a whole, the end cover is arranged at one end of the plastic package body, and the shaft extension end of the rotating shaft extends out of the plastic package body.
Compared with the prior art, the utility model has the following advantages:
1. A circlip, characterized in that: the damping device comprises a retainer ring body, wherein a downward concave groove is formed in the top surface of the retainer ring body, and elastic materials with large damping are filled in the groove.
2. Other advantages of the present utility model are described in detail in the description of the embodiments.
Drawings
FIG. 1 is a schematic diagram of an external load of an air conditioner in the prior art;
FIG. 2 is a prior art equivalent cantilever structure when the fan blade is stationary;
FIG. 3 is a schematic diagram of a motor and fan blade mounting structure in the prior art;
FIG. 4 is a prior art slice of the original motor 30-order axial vibration and noise;
FIG. 5 is a graph showing the comparison of 30-order slices of noise of an air conditioner outdoor unit after vibration isolators are added in the prior art;
FIG. 6 is a comparative view of a 30-order axial slice of a motor after vibration isolator addition in the prior art;
Fig. 7 is a schematic view of a prior art vibration isolator with one added vibration isolator solution;
FIG. 8 is a perspective view of a first embodiment of the present utility model;
FIG. 9 is an exploded view of a first embodiment of the present utility model;
FIG. 10 is a front view of a first embodiment of the present utility model;
FIG. 11 is a cross-sectional view of A-A of FIG. 10;
fig. 12 is a schematic structural diagram of a second embodiment of the present utility model;
FIG. 13 is an enlarged view of part of B in FIG. 12;
fig. 14 is a cross-sectional view of a second embodiment of the present utility model.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Embodiment one:
as shown in fig. 8 to 11, the present embodiment provides a circlip, which is characterized in that: the damping type axial resonance damping device comprises a retainer ring body 1, wherein a downward concave groove 10 is formed in the top surface 11 of the retainer ring body 1, an elastic material 2 with large damping is filled in the groove 10, the retainer ring body and the elastic material are integrated into a whole through the structure, a damping ring is not required to be additionally arranged, load noise generated due to axial resonance can be effectively solved, mass production and low-cost production can be carried out, and the damping type axial resonance damping device has unique advantages in terms of cost and reliability.
The groove 10 is formed by punching, and an annular raised peripheral edge 12 is formed around the groove 10.
The axial height H1 of the elastic material 2 is higher than the axial height H2 of the groove 10, so that a part of the elastic material 2 is exposed outside the groove 10, thereby avoiding contacting with pollutants in the external environment, greatly prolonging the service life, and preventing the exposed rubber from being aged and falling off to cause load noise reproduction even if the rubber is operated in a severe environment for a long time.
The elastic material 2 is a rubber material.
Embodiment two:
As shown in fig. 12 to 14, a fan comprises a motor 3 and a wind wheel 4, wherein the motor 3 comprises a rotating shaft 31, the rotating shaft 31 comprises a shaft extending end 311, the wind wheel 4 is arranged on the shaft extending end 311, a split washer is arranged on the shaft extending end 311, the bottom end of the wind wheel 4 is abutted to the split washer, a nut 5 at the other end of the wind wheel 4 is locked, and the wind wheel 4 is locked on the rotating shaft 31 through the locking connection of the nut 5 and the end part of the shaft extending end 311, and the fan is characterized in that: the split ring is the first split ring, the bottom end of the wind wheel 4 is propped against the elastic material 2 on the top surface 11 of the ring body 1, and the elastic materials of the wind wheel and the split ring are in soft contact, so that vibration isolation is achieved, and noise generated by axial resonance is effectively solved.
The motor 3 further comprises a plastic package stator 32, a rotor assembly 33 and an end cover 34, wherein the plastic package stator 32 is sleeved outside the rotor assembly 33, the rotor assembly 33 is sleeved outside the rotating shaft 31, the plastic package stator 32 comprises a plastic package body 321, a stator core 322, end insulation 323 and a coil winding 324, the plastic package body 321 is used for plastic package of the stator core 322, the end insulation 323 and the coil winding 324 into a whole, the end cover 34 is arranged at one end of the plastic package body 321, and the shaft extension end of the rotating shaft 31 extends out of the plastic package body 321.
The above examples are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited thereto, and any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principles of the present utility model are included in the scope of the present utility model.
Claims (4)
1. A circlip, characterized in that: the anti-vibration device comprises a check ring body (1), wherein a downward concave groove (10) is formed in the top surface (11) of the check ring body (1), and elastic materials (2) with large damping are poured into the groove (10); the groove (10) is formed by punching, and an annular raised surrounding edge (12) is formed around the groove (10); the axial height H1 of the elastic material (2) is higher than the axial height H2 of the groove (10), so that the elastic material (2) is partially exposed outside the groove (10).
2. A circlip according to claim 1 wherein: the elastic material (2) is a rubber material.
3. The utility model provides a fan, including motor (3) and wind wheel (4), motor (3) include pivot (31), pivot (31) are including axle stretch end (311), wind wheel (4) are installed on axle stretch end (311), install the split washer on axle stretch end (311), the bottom of wind wheel (4) supports on the split washer, wind wheel (4) other end nut (5) locking, through nut (5) and axle stretch end (311) tip locking connection, with wind wheel (4) locking on pivot (31), its characterized in that: the split ring is as claimed in any one of claims 1 to 2, and the bottom end of the wind wheel (4) is abutted against the elastic material (2) on the top surface (11) of the ring body (1).
4. A fan as claimed in claim 3, wherein: the motor (3) further comprises a plastic package stator (32), a rotor assembly (33) and an end cover (34), wherein the plastic package stator (32) is sleeved outside the rotor assembly (33), the rotor assembly (33) is sleeved outside the rotating shaft (31), the plastic package stator (32) comprises a plastic package body (321), a stator core (322), end insulation (323) and a coil winding (324), the plastic package body (321) is used for integrally plastic packaging the stator core (322), the end insulation (323) and the coil winding (324), the end cover (34) is arranged at one end of the plastic package body (321), and the shaft extension end of the rotating shaft (31) extends out of the plastic package body (321).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322335075.2U CN220869730U (en) | 2023-08-29 | 2023-08-29 | Split retainer ring and fan using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322335075.2U CN220869730U (en) | 2023-08-29 | 2023-08-29 | Split retainer ring and fan using same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220869730U true CN220869730U (en) | 2024-04-30 |
Family
ID=90806252
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322335075.2U Active CN220869730U (en) | 2023-08-29 | 2023-08-29 | Split retainer ring and fan using same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220869730U (en) |
-
2023
- 2023-08-29 CN CN202322335075.2U patent/CN220869730U/en active Active
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