Vibration-damping washers, motor vibration-damping components and air conditioners

Abstract

The present disclosure provides a vibration-damping washer, a motor vibration-damping assembly, and an air conditioner, wherein the vibration-damping washer comprises: a body; the body comprises a first support portion and a second support portion, wherein the first support portion is configured to be in contact and connected with a vibration component, and the second support portion is configured to be in contact and connected with the support component; a hard body, wherein the hard body is arranged in the body, and the hard body is configured to improve the rigidity of the body. The vibration-damping washer of the present disclosure improves the axial or radial rigidity of the rubber ring body by adding a hard body inside, so that the natural frequency of the motor vibration isolation system using the vibration-damping washer of the present disclosure is more ideal, thereby solving the problem of large axial vibration of the motor caused by the imbalance of the rotor of the motor.

Description

Technical Field

[0001] The present invention belongs to the technical field of air conditioners, and in particular relates to a vibration-damping washer, a motor vibration-damping assembly and an air conditioner. Background Art

[0002] A vibration-damping washer needs to be placed between the motor and the motor bracket in the indoor unit of the air conditioner to reduce the transmission of motor vibration to other structural parts.

[0003] The vibration isolation characteristics of the vibration-damping gasket depend on the stiffness of the vibration-damping gasket itself and the weight of the motor it carries. Under a certain configuration of the motor and the fan blades, the natural frequency of the vibration isolation system composed of the motor and the vibration-damping gasket may fall within the range of the motor's rotation frequency. At this time, if the fan is improperly assembled and a balance problem occurs, the motor may resonate and cause increased axial vibration. To address this problem, the prior art often changes the hardness of the vibration-damping gasket to change the natural frequency of the axial vibration of the vibration isolation system, so that it is equal to the motor's rotation frequency, thereby reducing the motor vibration. However, due to the material of the vibration-damping gasket, its hardness is limited, and simply changing the hardness of the vibration-damping gasket cannot obtain the ideal natural frequency. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present disclosure is that the ideal natural frequency cannot be obtained by changing the hardness of the vibration-damping washer, and thus a vibration-damping washer, a motor vibration-damping assembly and an air conditioner are provided.

[0005] In order to solve the above problems, the present disclosure provides a vibration-damping washer, comprising:

[0006] The body comprises a first supporting portion and a second supporting portion, wherein the first supporting portion is configured to be in contact with and connected to the vibration component, and the second supporting portion is configured to be in contact with and connected to the support component;

[0007] The hard body is arranged in the main body, and the hard body is configured to improve the rigidity of the main body.

[0008] The purpose of the present disclosure and the solution of its technical problems can also be further achieved by adopting the following technical measures.

[0009] In some embodiments, the body is annular, the first support portion includes an axial hole provided on the body, and the second support portion includes an annular groove provided on the outer peripheral surface of the body.

[0010] In some embodiments, the vibration component is a motor assembly, the motor assembly includes a motor shaft, and the vibration-damping washer is connected to the motor shaft through an axial hole; and / or, the support component includes a motor bracket, and the vibration-damping washer is installed on the motor bracket through an annular groove.

[0011] In some embodiments, the hard body is disposed perpendicular to the axis of the body, and the hard body is configured to increase the axial rigidity of the body.

[0012] In some embodiments, the hard body includes at least one flat washer-shaped member, the at least one flat washer-shaped member is disposed perpendicular to the axis of the body, and the at least one flat washer-shaped member is configured to increase the axial rigidity of the body.

[0013] In some embodiments, the hard body includes two flat washer-shaped members, which are symmetrically disposed on both axial sides of the annular groove, and the two flat washer-shaped members are configured to provide axial rigidity of the body at the annular groove.

[0014] In some embodiments, the hard body is disposed parallel to the axis of the body, and the hard body is configured to increase the radial stiffness of the body.

[0015] In some embodiments, the main body is made of any one of EPDM rubber, natural rubber, and nitrile rubber, and / or the hard body is made of any one of hard plastic and metal.

[0016] A motor vibration reduction assembly adopts the above-mentioned vibration reduction gasket.

[0017] The purpose of the present disclosure and the solution of its technical problems can also be further achieved by adopting the following technical measures.

[0018] In some embodiments, the motor vibration reduction assembly includes a motor body, a motor shaft, and a motor bracket. The vibration reduction washer is connected to the motor shaft through an axial hole. The vibration reduction washer is installed on the motor bracket through an annular groove. The motor bracket is provided with a clamp, which clamps the vibration reduction washer to the motor bracket.

[0019] In some embodiments, the maximum rotational fundamental frequency of the motor body is f 0 The axial natural frequency of the motor rubber ring vibration reduction system is f 1 , satisfying f 1 >f 0 .

[0020] In some embodiments, f 0 =n / 60, where n is the maximum operating speed of the motor, and / or, f 1 Obtained through simulation analysis.

[0021] An air conditioner adopts the vibration reduction washer or the motor vibration reduction assembly.

[0022] The vibration-damping washer, motor vibration-damping assembly and air conditioner provided by the present disclosure have at least the following beneficial effects:

[0023] The vibration-damping washer disclosed in the present invention improves the axial or radial stiffness of the rubber ring body by adding a hard body inside, so that the natural frequency of the motor vibration isolation system using the vibration-damping washer disclosed in the present invention is more ideal, thereby solving the problem of large axial vibration of the motor caused by the imbalance of the motor rotor. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a cross-sectional view of a vibration-damping washer according to an embodiment of the present disclosure;

[0025] Figure 2 is a cross-sectional view of a vibration-damping washer according to another embodiment of the present disclosure;

[0026] Figure 3 is a cross-sectional view of a vibration-damping washer according to another embodiment of the present disclosure;

[0027] Figure 4 is a cross-sectional view of a vibration-damping washer according to another embodiment of the present disclosure;

[0028] Figure 5 It is a structural schematic diagram of a vibration-damping washer according to an embodiment of the present disclosure;

[0029] Figure 6 It is an exploded view of the assembly of the motor vibration reduction assembly according to an embodiment of the present disclosure.

[0030] The reference numerals are as follows:

[0031] 1. Main body; 2. Hard body; 3. Shaft hole; 4. Ring groove; 5. Motor shaft; 6. Motor bracket; 7. Flat washer; 8. Motor body; 9. Mounting plate; 10. Clamp; 11. Vibration-damping washer. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the present disclosure clearer, the technical solutions of the present disclosure will be clearly and completely described below in combination with the specific embodiments of the present disclosure and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present disclosure.

[0033] Combination Figures 1 to 6 As shown, this embodiment provides a vibration-damping washer 11, including: a main body 1; the main body 1 includes a first supporting portion and a second supporting portion, the first supporting portion is constructed to be in contact and connected with the vibration component, and the second supporting portion is configured to be in contact and connected with the supporting component; a hard body 2, the hard body 2 is arranged in the main body 1, and the hard body 2 is constructed to increase the rigidity of the main body 1.

[0034] The vibration-damping washer 11 provided in the present invention improves the axial or radial stiffness of the rubber ring body 1 by adding a hard body 2 inside, so that the natural frequency of the motor vibration isolation system using the vibration-damping washer 11 of the present invention is more ideal, thereby solving the problem of large axial vibration of the motor shaft 5 caused by the imbalance of the motor rotor.

[0035] In some embodiments, in order to achieve installation and fixation of the motor assembly, the body 1 of the vibration-damping washer 11 is annular, the first support portion includes an axial hole 3 arranged on the body 1, and the second support portion includes an annular groove 4 arranged on the outer peripheral surface of the body 1.

[0036] In some embodiments, the embedded hard member may be a complete annular column, a segmented and evenly distributed fan-shaped column, or an irregularly shaped hard material, all of which can achieve the adjustment of the axial or radial stiffness of the vibration damping washer 11 .

[0037] In some embodiments, the vibration component is a motor assembly, the motor assembly includes a motor shaft 5, and the vibration-damping washer 11 is connected to the motor shaft 5 through the shaft hole 3; and / or, the support component includes a motor bracket 6, and the vibration-damping washer 11 is installed on the motor bracket 6 through the ring groove 4. The natural frequency of the vibration isolation system composed of the motor-vibration-damping washer 11 can be adjusted by changing the stiffness of the vibration-damping washer 11.

[0038] In some embodiments, the hard body 2 is arranged perpendicular to the axis of the body 1, and the hard body 2 is configured to improve the axial stiffness of the body 1. For the circular vibration-damping washer 11, in the vibration isolation system composed of the motor-vibration-damping washer 11, the axial stiffness of the vibration-damping washer 11 affects its natural frequency, and the most ideal natural frequency of the vibration isolation system can be obtained by reasonably configuring the axial stiffness of the vibration-damping washer 11.

[0039] In some embodiments, in order to reasonably configure the axial stiffness of the vibration damping washer 11 , the hard body 2 includes at least one flat washer 7 , at least one flat washer 7 is arranged perpendicular to the axis of the body 1 , and at least one flat washer 7 is configured to improve the axial stiffness of the body 1 .

[0040] In some embodiments, in order to reasonably configure the axial stiffness of the shock-absorbing rubber ring, the hard body 2 includes two flat gasket-shaped parts 7, which are symmetrically arranged on both axial sides of the annular groove 4, and the two flat gasket-shaped parts 7 are configured to provide axial stiffness of the main body 1 at the annular groove 4.

[0041] In some embodiments, in certain applications, the vibration-damping washer 11 needs to improve radial stiffness, so the hard body 2 is arranged parallel to the axis of the main body 1 , and the hard body 2 is configured to improve radial stiffness of the main body 1 .

[0042] In some embodiments, the body 1 is made of any one of EPDM rubber, natural rubber, and nitrile rubber, and / or the hard body 2 is made of any one of hard plastic and metal. Thus, the vibration-damping washer 11 can obtain a more reasonable stiffness range.

[0043] Combination Figure 6 As shown, this embodiment provides a motor vibration reduction assembly, which adopts the above-mentioned vibration reduction gasket 11.

[0044] In some embodiments, the motor vibration reduction assembly includes a motor body 8, a motor shaft 5, and a motor bracket 6. The vibration reduction washer 11 is connected to the motor shaft 5 through the shaft hole 3. The vibration reduction washer 11 is installed on the motor bracket 6 through the ring groove 4. The motor bracket 6 is provided with a clamp 10. The clamp 10 clamps the vibration reduction washer 11 on the motor bracket 6, thereby forming a motor-vibration reduction washer 11 vibration isolation system. The axial stiffness of the vibration reduction washer 11 can be used to stagger the natural frequency of the vibration isolation system with the rotational fundamental frequency of the motor body 8 to prevent resonance.

[0045] In some embodiments, during the design and development stage of the duct unit, the maximum operating speed n of the motor is determined according to the unit performance requirements, and the maximum rotation fundamental frequency of the motor body 1 is f 0 , f 0 =n / 60, where n is the maximum operating speed of the motor body 1, and the axial natural frequency of the motor rubber ring vibration reduction system is f 1 , f1 is obtained through simulation analysis and satisfies f 1 >f 0 If the requirements are not met, adjust the rubber ring embedded structure, such as material, number, distribution, geometric size, etc. Thus, the natural frequency of the vibration isolation system is staggered with the rotation fundamental frequency of the motor body 8 to prevent resonance.

[0046] The finite element simulation method was used to verify the effect of the vibration damping gasket 11 disclosed in the present invention on improving the axial stiffness of the vibration damping system. A 5HP duct machine was selected as the object. The fan system of the unit is a DC motor with 3 fan blades. The motor mass is 3.2Kg, the fan blade mass is 0.4Kg, and the motor is equipped with an ordinary rubber ring with a Shore hardness of about 42 (without embedded hard materials). The geometric dimensions of the vibration damping gasket 11 are: inner diameter 43mm, outer diameter 65mm, and thickness 10mm. The axial fixed frequency of the motor-rubber ring vibration reduction system was tested to be 16.5Hz through the fixed frequency test. When the hardness of the rubber ring was adjusted to a Shore hardness of 55, the tested axial fixed frequency was 17.5Hz, which was only 1Hz different from the original rubber ring, indicating that changing the hardness of the rubber ring had no obvious effect on the axial fixed frequency.

[0047] Finite element simulation analysis shows that the axial fixed frequency of the motor-original rubber ring vibration isolation system is 16.03 Hz, and the relative error between the simulation result and the test result is 2.8%. It can be seen that the simulation model has high accuracy and can be used to evaluate the effect of the motor vibration damping rubber ring proposed in this disclosure on the axial natural frequency of the motor-vibration damping rubber ring vibration isolation system.

[0048] According to the publicly proposed structure of the vibration-damping gasket 11, when a steel material with a cross-section height of 9 mm and a width of 1 mm is embedded in the original rubber ring, the simulation results show that the axial fixed frequency of the motor-rubber ring vibration reduction system is 21.17 Hz, which is 5.14 Hz higher than the 16.03 Hz of ordinary rubber rings, and the fixed frequency is increased by 32%, with a significant improvement effect.

[0049] An air conditioner adopts the vibration reduction washer or the motor vibration reduction assembly.

[0050] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0051] The above are only preferred embodiments of the present disclosure and are not intended to limit the present disclosure. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present disclosure shall be included in the protection scope of the present disclosure. The above are only preferred implementations of the present disclosure. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present disclosure, and these improvements and variations should also be regarded as the protection scope of the present disclosure.

Claims

1. A vibration damping washer, It is characterized in that include: A body (1); the body (1) comprises a first supporting portion and a second supporting portion, the first supporting portion being configured to be in contact and connected with a vibration component, and the second supporting portion being configured to be in contact and connected with the support component; A hard body (2), the hard body (2) being arranged in the body (1), the hard body (2) being configured to increase the rigidity of the body (1); The body (1) is annular, the first support portion comprises an axial hole (3) arranged on the body (1), and the second support portion comprises an annular groove (4) arranged on the outer peripheral surface of the body (1); The supporting component comprises a motor bracket (6), and the vibration-damping washer (11) is mounted on the motor bracket (6) through the annular groove (4); The hard body (2) comprises two flat washer-shaped parts (7), the two flat washer-shaped parts (7) are symmetrically arranged on both axial sides of the annular groove (4), and the two flat washer-shaped parts (7) are configured to provide axial rigidity of the body (1) at the annular groove (4).

2. The vibration damping washer according to claim 1, It is characterized in that The vibration component is a motor assembly, which comprises a motor shaft (5), and the vibration-damping washer (11) is connected to the motor shaft (5) through the shaft hole (3).

3. The vibration damping washer according to claim 1, It is characterized in that The hard body (2) is arranged perpendicular to the axis of the body (1), and the hard body (2) is configured to improve the axial rigidity of the body (1).

4. The vibration damping washer according to any one of claims 1 to 3, It is characterized in that The main body (1) is made of any one of EPDM rubber, natural rubber and nitrile rubber, and / or the hard body (2) is made of any one of hard plastic and metal.

5. A motor vibration reduction assembly, It is characterized in that A vibration-damping washer (11) as claimed in any one of claims 1 to 4 is used.

6. The motor vibration reduction assembly according to claim 5, It is characterized in that The motor vibration reduction assembly comprises a motor body (8), a motor shaft (5), and a motor bracket (6); the vibration reduction washer (11) is connected to the motor shaft (5) through the shaft hole (3); the vibration reduction washer (11) is installed on the motor bracket (6) through the annular groove (4); a clamp (10) is provided on the motor bracket (6); and the clamp (10) clamps the vibration reduction washer (11) on the motor bracket (6).

7. The motor vibration reduction assembly according to claim 6, It is characterized in that The maximum rotational fundamental frequency of the motor body (8) is f 0 , the axial natural frequency of the motor vibration reduction assembly is f 1 ,satisfy f 1 > f 0 .

8. The motor vibration reduction assembly according to claim 7, It is characterized in that Said f 0 =n / 60 ,in n is the maximum operating speed of the motor body (8), and / or, f 1 Obtained through simulation analysis.

9. An air conditioner, It is characterized in that The vibration-damping washer (11) described in any one of claims 1 to 4 is used, or the motor vibration-damping assembly described in any one of claims 5 to 8 is used.

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