Volute assembly, fan device and air conditioning system

Abstract

The utility model provides a volute assembly, fan device and air conditioning system, volute assembly includes volute body and first damping structure, volute body includes the round volute air duct and first volute tongue air duct of intercommunication, first damping structure includes first guide rail and first sliding part, first guide rail sets up in the axial leeward side of round volute air duct and sets up in the circumference of round volute air duct close to first volute tongue air duct, and first guide rail extends in the circumference of round volute air duct, first sliding part can be supported on first guide rail in the circumference of round volute air duct slidingly, and first sliding part is equipped with first damping cavity, fills in a plurality of first damping particles in first damping cavity, a plurality of first damping particles can move in first damping cavity. The utility model volute assembly can adaptively adjust damping structure to adapt to different vibration frequency, vibration amplitude, vibration intensity, to reach better damping effect, to more effective inhibition volute vibration and radiation noise.

Description

Technical Field

[0001] This utility model relates to the field of air conditioner technology, and in particular to a volute assembly, a fan device having the volute assembly, and an air conditioning system having the fan device. Background Technology

[0002] In the duct structure of an air conditioning system, the volute is one of the core components. During the operation of the air conditioning system, it is affected by the airflow pulsation caused by the rotation of the fan impeller, which generates a large amount of vibration and radiated noise. The vibration problem of the volute and the radiated noise have always been key factors affecting the stability and service life of the air conditioning system.

[0003] To reduce volute vibration and radiated noise, existing volutes have a cavity between the inner and outer shells. Reinforcing ribs are located within the cavity and connected between the inner and outer shells. The reinforcing ribs divide the cavity into at least two damping chambers, each containing damping material. By adding reinforcing ribs, the overall strength and stiffness of the wind turbine volute are increased, while the cavity is divided into at least two damping chambers, each containing damping material. The damping material dissipates mechanical vibration energy, thereby reducing volute vibration and radiated noise. Since there are multiple damping chambers, the damping material can be distributed more evenly and will not accumulate in the cavity, thus improving the vibration reduction effect.

[0004] However, existing volutes require an inner shell and an outer shell, with reinforcing ribs connecting them, which adds extra structural weight to the volute and consequently increases the overall weight of the machine. Furthermore, the vibration damping chamber in existing volutes is fixed in position. However, different impeller speeds result in varying vibration frequencies, amplitudes, and intensities on the volute. A fixed-position vibration damping chamber cannot adaptively adapt to these different vibration frequencies, amplitudes, and intensities, thus failing to achieve optimal vibration damping. Summary of the Invention

[0005] To achieve the primary objective of this invention, this invention provides a volute assembly that can adaptively adjust the damping structure to adapt to different vibration frequencies, vibration amplitudes, and vibration intensities, thereby achieving a better vibration reduction effect. This more effectively suppresses volute vibration and radiated noise without significantly increasing the additional structural weight, thus avoiding a significant increase in the overall weight of the machine.

[0006] To achieve the second objective of this utility model, this utility model provides a fan device having the above-mentioned volute assembly.

[0007] To achieve the third objective of this utility model, this utility model provides an air conditioning system having the above-mentioned fan device.

[0008] To achieve the first objective of this utility model, this utility model provides a volute assembly, including a volute housing and a first vibration damping structure. The volute housing includes a connected circular volute air duct and a first volute tongue air duct. An air inlet is provided through the axial air inlet side of the circular volute air duct. A first air outlet is provided at the radial end of the circular volute air duct away from the circular volute air duct. The first vibration damping structure includes a first guide rail and a first sliding member. The first guide rail is disposed on the axial leeward side of the circular volute air duct and is located close to the first volute tongue air duct in the circumferential direction of the circular volute air duct. The first guide rail extends in the circumferential direction of the circular volute air duct. The first sliding member is slidably supported on the first guide rail in the circumferential direction of the circular volute air duct. The first sliding member is provided with a first vibration damping cavity, which is filled with a plurality of first damping particles that can move within the first vibration damping cavity.

[0009] As can be seen from the above scheme, the vibration energy of the volute casing is transmitted to the first damping structure located on the axial leeward side of the circular volute air duct. This causes the first damping particles in the first damping cavity of the first sliding member of the first damping structure to move and absorb energy. During low-frequency vibration, frictional motion mainly exists between the multiple first damping particles and between the multiple first damping particles and the cavity wall of the first damping cavity. During high-frequency vibration, collisional motion mainly exists between the multiple first damping particles and between the multiple first damping particles and the cavity wall of the first damping cavity. Therefore, along with the vibration transmission of the volute casing, the multiple first damping particles in the first damping cavity vibrate accordingly, causing the multiple first damping particles to continuously collide and rub against the cavity wall of the first damping cavity. At the same time, the multiple first damping particles continuously collide and rub against each other to convert the transmitted vibration energy into the kinetic energy of the first damping particles, thereby significantly consuming and attenuating the volute casing. The vibration energy generated by the casing reduces the vibration and radiated noise generated by the volute casing. Furthermore, as the vibration frequency, amplitude, and intensity of the volute casing change, the first sliding member of this invention slides along the first guide rail on the circumference of the circular volute channel under the vibration of the volute casing. This allows it to automatically slide along the circumference of the circular volute channel to find a more suitable position for energy dissipation. This enables the first sliding member to dynamically adjust its position according to the vibration of the volute casing, changing the collision path and frequency of the multiple first damping particles in the first damping cavity of the first sliding member. This allows the multiple first damping particles in the first damping cavity of the first sliding member to participate more fully and maximally in energy absorption and dissipation, achieving a better vibration reduction effect. This more effectively suppresses volute casing vibration and radiated noise, and also reduces long-term stress concentration in local areas of the volute casing, thereby extending the service life of the equipment. In addition, since the vibration is particularly prominent at the connection point between the circular volute channel and the first volute tongue channel, the first vibration reduction structure of this invention is positioned close to the first volute tongue channel on the circumference of the circular volute channel, further effectively suppressing volute casing vibration and radiated noise. In addition, the first vibration reduction structure of this utility model consists only of a first guide rail, a first sliding member and a first damping particle, so it will not significantly increase the additional structural weight, thereby avoiding a significant increase in the overall weight of the machine.

[0010] Therefore, the volute assembly of this utility model can adaptively adjust the damping structure to adapt to different vibration frequencies, vibration amplitudes, and vibration intensities to achieve better vibration reduction effects, thereby more effectively suppressing volute vibration and radiated noise, without significantly increasing the additional structural weight, thus avoiding a significant increase in the overall weight of the machine.

[0011] A further embodiment is that the periphery of the first damping cavity is provided with a first alloy steel layer to form a first wear-resistant cavity, and multiple first damping particles can move within the first wear-resistant cavity; and / or, the first sliding member is made of carbon fiber reinforced resin material; and / or, the filling rate of the multiple first damping particles filling the first damping cavity is between 50% and 70%; and / or, the diameter of the first damping particles is between 5 mm and 7 mm; and / or, the first damping particles are one of rubber-coated steel particles, acrylic particles, and stainless steel particles.

[0012] A further embodiment is that there are two first guide rails, which are arranged side by side in the radial direction of the volute air duct to form a first limiting groove between the two first guide rails. Each first guide rail is provided with a first sliding groove that extends in the circumferential direction of the volute air duct. A first sliding member can slide in the first limiting groove in the circumferential direction of the volute air duct, and a first sliding rail is provided on each of the opposite sides of the first sliding member in the radial direction of the volute air duct. The first sliding rail extends in the circumferential direction of the volute air duct, and one first sliding rail can slide in the first sliding groove in the circumferential direction of the volute air duct.

[0013] A further embodiment is that the first slide groove has first balls protruding from the opposite groove surface of the first slide rail in the axial direction of the volute, and the first balls are rotatably supported on the groove surface of the first slide groove, so that the first slide rail has first balls sandwiched between the opposite sides in the axial direction of the volute; or, the groove circumferential surface of the first slide groove is provided with a first lubricating coating to form a first lubricating groove, and a first slide rail is slidably located in a first lubricating groove in the circumferential direction of the volute; and / or, the first guide rail is provided with a second lubricating coating on the side of the first sliding member in the radial direction of the volute.

[0014] A further embodiment includes a second volute tongue duct connected to the circular volute air duct. The second volute tongue duct has a second air outlet at one end of the circular volute air duct that is radially away from the circular volute air duct. The volute assembly also includes a second vibration damping structure, which includes a second guide rail and a second sliding member. The second guide rail is disposed on the axial leeward side of the circular volute air duct and is located close to the second volute tongue duct in the circumferential direction of the circular volute air duct. The second guide rail extends in the circumferential direction of the circular volute air duct. The second sliding member can be slidably supported on the second guide rail in the circumferential direction of the circular volute air duct. The second sliding member has a second vibration damping cavity, which is filled with a plurality of second damping particles that can move within the second vibration damping cavity.

[0015] A further embodiment is that the periphery of the second damping cavity is provided with a second alloy steel layer to form a second wear-resistant cavity, and multiple second damping particles can move within the second wear-resistant cavity; and / or, the second sliding element is made of carbon fiber reinforced resin material; and / or, the filling rate of the multiple second damping particles filling the second damping cavity is between 50% and 70%; and / or, the diameter of the second damping particles is between 5 mm and 7 mm; and / or, the second damping particles are one of rubber-coated steel particles, acrylic particles, and stainless steel particles.

[0016] A further embodiment involves having two second guide rails arranged side-by-side in the radial direction of the volute air duct to form a second limiting groove between them. Each second guide rail is provided with a second sliding groove extending in the circumferential direction of the volute air duct. A second sliding member can slide in the second limiting groove in the circumferential direction of the volute air duct, and a second sliding rail is provided on each of the opposite sides of the second sliding member in the radial direction of the volute air duct. The second sliding rail extends in the circumferential direction of the volute air duct, and one second sliding rail can slide in one second sliding groove in the circumferential direction of the volute air duct.

[0017] A further embodiment is that the second slide groove has second balls protruding from the opposite groove surface of the second slide rail in the axial direction of the volute, and the second balls are rotatably supported on the groove surface of the second slide groove, so that the second slide rail has the second balls sandwiched between the opposite sides in the axial direction of the volute; or, the groove circumferential surface of the second slide groove is provided with a third lubricating coating to form a second lubricating groove, and a second slide rail is slidably located in a second lubricating groove in the circumferential direction of the volute; and / or, the second guide rail is provided with a fourth lubricating coating on the side of the second slide member in the radial direction of the volute.

[0018] To achieve the second objective of this utility model, this utility model provides a fan device, including a centrifugal impeller and a volute assembly, wherein the volute assembly is the aforementioned volute assembly, and the centrifugal impeller is located inside the volute air duct of the volute assembly.

[0019] To achieve the second objective of this utility model, this utility model provides an air conditioning system, including a fan device, wherein the fan device is the aforementioned fan device. Attached Figure Description

[0020] Figure 1 This is an air inlet side view of an embodiment of the volute assembly of this utility model.

[0021] Figure 2 This is a cross-sectional view of an embodiment of the volute assembly of this utility model.

[0022] Figure 3 This is an exploded view of an embodiment of the volute assembly of this utility model.

[0023] Figure 4 This is a leeward side view of an embodiment of the volute assembly of this utility model.

[0024] Figure 5 yes Figure 4 Enlarged view at point A.

[0025] Figure 6 This is a cross-sectional view of the first vibration damping structure in an embodiment of the volute assembly of this utility model.

[0026] Figure 7 This is a structural diagram of the first vibration damping structure in an embodiment of the volute assembly of this utility model.

[0027] Figure 8 yes Figure 7 Enlarged view at point C.

[0028] Figure 9 This is a structural diagram of the first sliding member in an embodiment of the volute assembly of this utility model.

[0029] Figure 10 This is a side view of the first sliding member in an embodiment of the volute assembly of this utility model.

[0030] Figure 11 This is a cross-sectional view of the first sliding member in an embodiment of the volute assembly of this utility model.

[0031] Figure 12 yes Figure 4 Enlarged view at point B.

[0032] Figure 13 This is a cross-sectional view of the second vibration damping structure in an embodiment of the volute assembly of this utility model.

[0033] Figure 14 This is a structural diagram of the second vibration damping structure in an embodiment of the volute assembly of this utility model.

[0034] Figure 15 yes Figure 14 Enlarged view at point D.

[0035] Figure 16 This is a structural diagram of the second sliding member in an embodiment of the volute assembly of this utility model.

[0036] Figure 17 This is a side view of the second sliding member in an embodiment of the volute assembly of this utility model.

[0037] Figure 18 This is a cross-sectional view of the second sliding member in an embodiment of the volute assembly of this utility model.

[0038] The present invention will be further described below with reference to the accompanying drawings and embodiments. Detailed Implementation

[0039] See Figures 1 to 11 This embodiment discloses a volute assembly, including a volute housing 11 and a first vibration damping structure 12. The volute housing 11 includes a circular volute air duct 111 and a first volute tongue air duct 112 that are connected to each other. An air inlet hole 1111 is provided through the axial air inlet side 1112 of the circular volute air duct 111, and a first air outlet 1121 is provided at the end of the first volute tongue air duct 112 that is radially away from the circular volute air duct 111.

[0040] In this embodiment, the first vibration damping structure 12 includes a first guide rail 121 and a first sliding member 122. The first guide rail 121 is disposed on the axial leeward side 1113 of the circular volute duct 111 and is disposed close to the first volute tongue duct 112 in the circumferential direction of the circular volute duct 111. The first guide rail 121 extends in the circumferential direction of the circular volute duct 111.

[0041] Furthermore, in this embodiment, the first sliding member 122 can be slidably supported on the first guide rail 121 in the circumferential direction of the spiral air duct 111, and the first sliding member 122 is provided with a first damping cavity, which is filled with a plurality of first damping particles 123, and the plurality of first damping particles 123 can move within the first damping cavity.

[0042] The centrifugal impeller of the fan device is located inside the volute air duct 111 of the volute assembly in this embodiment. As the centrifugal impeller rotates, the airflow enters the volute air duct 111 through the axial air inlet 1111 and is sent out through the radial first air outlet 1121 of the first volute tongue air duct 112, thereby forming a fan device that uses centrifugal force to axially draw in the airflow and radially accelerate it out. During operation, the airflow pulsation caused by the rotation of the centrifugal impeller causes the volute casing 11 to vibrate. The vibration energy of the volute casing 11 is transmitted to the first damping structure 12 located on the axial leeward side 1113 of the circular volute duct 111. This causes the first damping particles 123 in the first damping cavity of the first sliding member 122 of the first damping structure 12 to move and absorb energy. At low frequencies, frictional motion mainly exists between the multiple first damping particles 123 and between the multiple first damping particles 123 and the cavity wall of the first damping cavity. At high frequencies, collisional motion mainly exists between the multiple first damping particles 123 and between the multiple first damping particles 123 and the cavity wall of the first damping cavity. Therefore, along with the vibration transmission of the volute casing 11, the multiple first damping particles 123 in the first damping cavity vibrate accordingly, causing the multiple first damping particles 123 to continuously collide and rub against the cavity wall of the first damping cavity. At the same time, the multiple first damping particles 123 continuously collide and rub against each other to convert the transmitted vibration energy into the first damping particles 123. The kinetic energy of 23 is used to significantly consume and attenuate the vibration energy generated by the volute housing 11, thereby reducing the vibration and radiation noise generated by the volute housing 11. Furthermore, as the vibration frequency, vibration amplitude, and vibration intensity of the volute housing 11 change, the first sliding member 122 in this embodiment will slide along the first guide rail 121 in the circumferential direction of the circular volute air duct 111 under the vibration action of the volute housing 11, so as to automatically slide in the circumferential direction of the circular volute air duct 111 to find a more suitable position for energy dissipation. This allows the first sliding member 122 to dynamically adjust its position according to the vibration of the volute housing 11, thereby changing the collision path and frequency of the multiple first damping particles 123 in the first damping cavity of the first sliding member 122. This allows the multiple first damping particles 123 in the first damping cavity of the first sliding member 122 to participate more fully and maximize the absorption and dissipation of energy, so as to achieve a better damping effect, thereby more effectively suppressing the vibration and radiation noise of the volute housing, and also reducing the long-term stress concentration in the local area of ​​the volute housing 11, thereby extending the service life of the equipment. Furthermore, since the vibration is particularly prominent at the connection point between the circular volute air duct 111 and the first volute tongue air duct 112 of the volute housing 11, the first vibration damping structure 12 in this embodiment is set close to the first volute tongue air duct 112 in the circumferential direction of the circular volute air duct 111, thereby further and more effectively suppressing the vibration and radiated noise of the volute housing.In addition, the first vibration damping structure 12 in this embodiment consists only of the first guide rail 121, the first sliding member 122 and the first damping particle 123, so it will not significantly increase the additional structural weight, thereby avoiding a significant increase in the overall weight of the machine.

[0043] Therefore, the volute assembly in this embodiment can adaptively adjust the damping structure to adapt to different vibration frequencies, vibration amplitudes, and vibration intensities to achieve better vibration reduction effects, thereby more effectively suppressing volute vibration and radiated noise, without significantly increasing the additional structural weight, thus avoiding a significant increase in the overall weight of the machine.

[0044] Combination Figures 5 to 11 In this embodiment, the periphery of the first damping cavity of the first sliding member 122 is provided with a first alloy steel layer 124 to form a first wear-resistant cavity 1241. Multiple first damping particles 123 can move within the first wear-resistant cavity 1241, significantly improving its wear resistance and impact resistance, thereby enabling the first wear-resistant cavity 1241 to withstand the localized stress generated by the frequent collisions of the first damping particles 123. Preferably, the first alloy steel layer 124 is 42CrMo alloy steel.

[0045] To reduce weight, the first sliding member 122 in this embodiment is made of carbon fiber reinforced resin material. This lightweight design of the first sliding member 122 reduces the added weight, while the viscoelasticity of the carbon fiber reinforced resin material dissipates high-frequency vibration energy, further reducing vibration.

[0046] To achieve the optimal energy dissipation mechanism, the first damping particles 123 need to have appropriate density and elasticity, and possess certain sound absorption characteristics. Therefore, in this embodiment, the filling rate of the plurality of first damping particles 123 filling the first damping cavity of the first sliding member 122 is between 50% and 70%, the diameter of the first damping particles 123 is between 5 mm and 7 mm, and the first damping particles 123 are one of rubber-coated steel particles, acrylic particles, or stainless steel particles. Preferably, in this embodiment, the filling rate of the plurality of first damping particles 123 filling the first damping cavity of the first sliding member 122 is 60%, the diameter of the first damping particles 123 is 6 mm, and the first damping particles 123 are rubber-coated steel particles, thus achieving the best vibration reduction effect and efficiency.

[0047] Specifically, in this embodiment, there are two first guide rails 121. The two first guide rails 121 are arranged side by side in the radial direction of the volute duct 111 so that a first limiting groove 1213 is formed between the two first guide rails 121. Each first guide rail 121 is provided with a first sliding groove 1211. The first sliding groove 1211 extends in the circumferential direction of the volute duct 111. In this embodiment, the first sliding member 122 can automatically slide in the circumferential direction of the volute duct 111 within the first limiting groove 1213. The first sliding member 122 has first sliding rails 1221 protruding from opposite sides in the radial direction of the volute duct 111. The first sliding rails 1221 extend in the circumferential direction of the volute duct 111. One first sliding rail 1221 can automatically slide in the circumferential direction of the volute duct 111 within one first sliding groove 1211.

[0048] To improve the smoothness of the first sliding member 122 sliding automatically in the circumferential direction of the spiral air duct 111, in this embodiment, the first groove 1211 of the first guide rail 121 has first balls 1212 protruding from the opposite groove surface of the first slide rail 1221 of the first sliding member 122 in the axial direction of the spiral air duct 111. The first balls 1212 are rotatably supported on the groove surface of the first groove 1211, so that the first balls 1212 are sandwiched on opposite sides of the first slide rail 1221 in the axial direction of the spiral air duct 111, thereby reducing the friction between the first groove 1211 of the first guide rail 121 and the first slide rail 1221 of the first sliding member 122. This allows the first slide rail 1221 of the first sliding member 122 to slide freely within the first groove 1211 of the first guide rail 121, thereby improving the smoothness of the first sliding member 122 sliding freely in the circumferential direction of the spiral air duct 111.

[0049] Optionally, in this embodiment, the circumferential surface of the first groove 1211 of the first guide rail 121 is provided with a first lubricating coating to form a first lubricating groove. A first slide rail 1221 can automatically slide in a first lubricating groove in the circumferential direction of the spiral air duct 111, thereby reducing the friction between the first groove 1211 of the first guide rail 121 and the first slide rail 1221 of the first sliding member 122. This allows the first slide rail 1221 of the first sliding member 122 to slide freely within the first groove 1211 of the first guide rail 121, thereby improving the smoothness of the first sliding member 122 sliding freely in the circumferential direction of the spiral air duct 111. Preferably, the first lubricating coating is a PTFE (polytetrafluoroethylene) self-lubricating coating.

[0050] To reduce the friction between the first guide rail 121 and the first sliding member 122, in this embodiment, the first guide rail 121 is provided with a second lubricating coating on the radial side of the circular volute 111 near the first sliding member 122, so that the first sliding member 122 can slide freely and smoothly relative to the first guide rail 121 in the circumferential direction of the circular volute 111. Preferably, the second lubricating coating is a PTFE (polytetrafluoroethylene) self-lubricating coating.

[0051] See Figures 12 to 18 In this embodiment, the volute housing 11 further includes a second volute tongue air duct 113 connected to the circular volute air duct 111. The second volute tongue air duct 113 has a second air outlet 1131 at one end of the circular volute air duct 111 that is radially away from the circular volute air duct 111. In this embodiment, the volute housing assembly also includes a second vibration damping structure 13. The second vibration damping structure 13 includes a second guide rail 131 and a second sliding member 132. The second guide rail 131 is disposed on the axial leeward side 1113 of the circular volute air duct 111 and is disposed close to the second volute tongue air duct 113 in the circumferential direction of the circular volute air duct 111. The second guide rail 131 extends in the circumferential direction of the circular volute air duct 111. The second sliding member 132 can be automatically slidably supported on the second guide rail 131 in the circumferential direction of the circular volute air duct 111. The second sliding member 132 is provided with a second vibration damping cavity. The second vibration damping cavity is filled with a plurality of second damping particles 133, which can move in the second vibration damping cavity.

[0052] During operation, the airflow pulsation caused by the rotation of the centrifugal impeller leads to vibration of the volute casing 11. The vibration energy of the volute casing 11 is transmitted to the second damping structure 13 located on the axial leeward side 1113 of the circular volute duct 111. This causes the second damping particles 133 in the second damping cavity of the second sliding member 132 of the second damping structure 13 to move and absorb energy. At low frequencies, frictional motion mainly exists between the multiple second damping particles 133 and between the multiple second damping particles 133 and the cavity wall of the second damping cavity. At high frequencies, collisional motion mainly exists between the multiple second damping particles 133 and between the multiple second damping particles 133 and the cavity wall of the second damping cavity. Therefore, along with the vibration transmission of the volute casing 11, the multiple second damping particles 133 in the second damping cavity vibrate accordingly, causing the multiple second damping particles 133 to continuously collide and rub against the cavity wall of the second damping cavity. At the same time, the multiple second damping particles 133 continuously collide and rub against each other to convert the transmitted vibration energy into second damping particles. The kinetic energy of 133 is used to significantly consume and attenuate the vibration energy generated by the volute housing 11, thereby reducing the vibration and radiated noise generated by the volute housing 11. Furthermore, as the vibration frequency, vibration amplitude, and vibration intensity of the volute housing 11 change, the second sliding member 132 in this embodiment will slide along the second guide rail 131 in the circumferential direction of the circular volute air duct 111 under the vibration action of the volute housing 11, so as to automatically slide in the circumferential direction of the circular volute air duct 111 to find a more suitable position for energy dissipation. This allows the second sliding member 132 to dynamically adjust its position according to the vibration of the volute housing 11, thereby changing the collision path and frequency of the multiple second damping particles 133 in the second damping cavity of the second sliding member 132. This allows the multiple second damping particles 133 in the second damping cavity of the second sliding member 132 to participate more fully and maximize the absorption and dissipation of energy, so as to achieve a better vibration reduction effect, thereby more effectively suppressing the vibration and radiated noise of the volute housing, and also reducing the long-term stress concentration in the local area of ​​the volute housing 11, thereby extending the service life of the equipment. Furthermore, since the vibration is particularly prominent at the connection point between the circular volute duct 111 and the second volute tongue duct 113 of the volute housing 11, the second vibration damping structure 13 in this embodiment is positioned close to the second volute tongue duct 113 in the circumferential direction of the circular volute duct 111, thereby further and more effectively suppressing volute vibration and radiated noise. In addition, the second vibration damping structure 13 in this embodiment consists only of the second guide rail 131, the second sliding member 132, and the second damping particle 133, thus not significantly increasing the additional structural weight and avoiding a significant increase in the overall weight of the machine.

[0053] To improve the wear resistance and impact resistance of the second damping cavity, in this embodiment, the peripheral wall of the second damping cavity of the second sliding member 132 is provided with a second alloy steel layer 134 to form a second wear-resistant cavity 1341. Multiple second damping particles 133 can move within the second wear-resistant cavity 1341. The provision of the second alloy steel layer 134 can significantly improve the wear resistance and impact resistance of the second wear-resistant cavity 1341, thereby enabling the second wear-resistant cavity 1341 to withstand the localized stress generated by the frequent collisions of the second damping particles 133. Preferably, the second alloy steel layer 134 is 42CrMo alloy steel.

[0054] To reduce weight, the second slider 132 in this embodiment is made of carbon fiber reinforced resin material. This lightweight design of the second slider 132 reduces the added weight, while the viscoelasticity of the carbon fiber reinforced resin material dissipates high-frequency vibration energy, further reducing vibration.

[0055] To achieve the optimal energy dissipation mechanism, the second damping particles 133 need to have appropriate density and elasticity, and possess certain sound absorption characteristics. Therefore, in this embodiment, the filling rate of the plurality of second damping particles 133 filling the second damping cavity of the second sliding member 132 is between 50% and 70%, the diameter of the second damping particles 133 is between 5 mm and 7 mm, and the second damping particles 133 are one of rubber-coated steel particles, acrylic particles, or stainless steel particles. Preferably, in this embodiment, the filling rate of the plurality of second damping particles 133 filling the second damping cavity of the second sliding member 132 is 60%, the diameter of the second damping particles 133 is 6 mm, and the second damping particles 133 are rubber-coated steel particles, thus achieving the best vibration reduction effect and efficiency.

[0056] Specifically, in this embodiment, there are two second guide rails 131. The two second guide rails 131 are arranged side by side in the radial direction of the volute duct 111 so that a second limiting groove 1313 is formed between the two second guide rails 131. Each second guide rail 131 is provided with a second sliding groove 1311. The second sliding groove 1311 extends in the circumferential direction of the volute duct 111. The second sliding member 132 can automatically slide in the circumferential direction of the volute duct 111 and is located in the second limiting groove 1313. The second sliding member 132 has a second sliding rail 1321 protruding from opposite sides in the radial direction of the volute duct 111. The second sliding rail 1321 extends in the circumferential direction of the volute duct 111. One second sliding rail 1321 can automatically slide in the circumferential direction of the volute duct 111 and is located in one second sliding groove 1311.

[0057] To improve the smoothness of the second sliding member 132 sliding automatically in the circumferential direction of the spiral air duct 111, in this embodiment, the second groove 1311 of the second guide rail 131 is provided with second balls 1312 protruding from the opposite groove surface of the second slide rail 1321 of the second sliding member 132 in the axial direction of the spiral air duct 111. The second balls 1312 are rotatably supported on the groove surface of the second groove 1311, so that the second slide rail 1321 is sandwiched between the second balls 1312 on opposite sides in the axial direction of the spiral air duct 111, thereby reducing the friction between the second groove 1311 of the second guide rail 131 and the second slide rail 1321 of the second sliding member 132. This allows the second slide rail 1321 of the second sliding member 132 to slide freely within the second groove 1311 of the second guide rail 131, thereby improving the smoothness of the second sliding member 132 sliding freely in the circumferential direction of the spiral air duct 111.

[0058] Optionally, in this embodiment, the circumferential surface of the second groove 1311 of the second guide rail 131 is provided with a third lubricating coating to form a second lubricating groove. A second slide rail 1321 can automatically slide within a second lubricating groove in the circumferential direction of the spiral air duct 111, thereby reducing the friction between the second groove 1311 of the second guide rail 131 and the second slide rail 1321 of the second sliding member 132. This allows the second slide rail 1321 of the second sliding member 132 to slide freely within the second groove 1311 of the second guide rail 131, thereby improving the smoothness of the second sliding member 132's free sliding in the circumferential direction of the spiral air duct 111. Preferably, the third lubricating coating is a PTFE (polytetrafluoroethylene) self-lubricating coating.

[0059] To reduce the friction between the second guide rail 131 and the second sliding member 132, in this embodiment, the second guide rail 131 is provided with a fourth lubricating coating on the radial side of the circular volute 111 near the second sliding member 132, so that the second sliding member 132 can slide freely in the circumferential direction of the circular volute 111 relative to the second guide rail 131. Preferably, the fourth lubricating coating is a PTFE (polytetrafluoroethylene) self-lubricating coating.

[0060] The above embodiments are merely preferred examples of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles of this utility model patent application should be included within the scope of this utility model patent application.

Claims

1. A volute assembly, comprising a volute housing, the volute housing including a communicating circular volute air duct and a first volute tongue air duct, wherein an air inlet is provided through the axial air inlet side of the circular volute air duct, and the first volute tongue air duct has a first air outlet at the radial end of the circular volute air duct away from the circular volute air duct, characterized in that: The volute assembly further includes a first vibration damping structure, which includes a first guide rail and a first sliding member. The first guide rail is disposed on the axial leeward side of the circular volute air duct and is disposed close to the first volute tongue air duct in the circumferential direction of the circular volute air duct, and the first guide rail extends in the circumferential direction of the circular volute air duct. The first sliding member is slidably supported on the first guide rail in the circumferential direction of the spiral air duct, and the first sliding member is provided with a first damping cavity, which is filled with a plurality of first damping particles, which can move within the first damping cavity.

2. The volute assembly according to claim 1, characterized in that: The first damping cavity has a first alloy steel layer on its periphery to form a first wear-resistant cavity, and multiple first damping particles can move within the first wear-resistant cavity; And / or, the first slider is made of carbon fiber reinforced resin material; And / or, the filling rate of the plurality of first damping particles filling the first damping cavity is between 50% and 70%; And / or, the diameter of the first damping particle is between 5 mm and 7 mm; And / or, the first damping particle is one of rubber-coated steel particles, acrylic particles, or stainless steel particles.

3. The volute assembly according to claim 1, characterized in that: The number of first guide rails is two. The two first guide rails are arranged side by side in the radial direction of the circular volute so that a first limiting groove is formed between the two first guide rails. Each first guide rail is provided with a first sliding groove, which extends in the circumferential direction of the circular volute. The first sliding member is slidably located in the first limiting groove in the circumferential direction of the volute, and the first sliding member is provided with first slide rails protruding from opposite sides in the radial direction of the volute. The first slide rails extend in the circumferential direction of the volute, and one first slide rail is slidably located in one first slide groove in the circumferential direction of the volute.

4. The volute assembly according to claim 3, characterized in that: The first slide groove is provided with first balls protruding from the opposite groove surface of the first slide rail in the axial direction of the volute. The first balls are rotatably supported on the groove surface of the first slide groove, so that the first slide rail clamps the first balls on opposite sides in the axial direction of the volute; or, the groove circumferential surface of the first slide groove is provided with a first lubricating coating to form a first lubricating groove, and one first slide rail is slidably located in one first lubricating groove in the circumferential direction of the volute. And / or, the first guide rail is provided with a second lubricating coating on the side of the first sliding member in the radial direction of the volute.

5. The volute assembly according to any one of claims 1 to 4, characterized in that: The volute housing also includes a second volute tongue air duct that is connected to the circular volute air duct. The second volute tongue air duct has a second air outlet at one end of the circular volute air duct that is radially away from the circular volute air duct. The volute assembly further includes a second vibration damping structure, which includes a second guide rail and a second sliding member. The second guide rail is disposed on the axial leeward side of the circular volute air duct and is disposed close to the second volute tongue air duct in the circumferential direction of the circular volute air duct, and the second guide rail extends in the circumferential direction of the circular volute air duct. The second sliding member is slidably supported on the second guide rail in the circumferential direction of the spiral air duct, and the second sliding member is provided with a second damping cavity, which is filled with a plurality of second damping particles, which can move within the second damping cavity.

6. The volute assembly according to claim 5, characterized in that: The second damping cavity has a second alloy steel layer on its periphery to form a second wear-resistant cavity, and multiple second damping particles can move inside the second wear-resistant cavity; And / or, the second slider is made of carbon fiber reinforced resin material; And / or, the filling rate of the plurality of second damping particles filling the second damping cavity is between 50% and 70%; And / or, the diameter of the second damping particle is between 5 mm and 7 mm; And / or, the second damping particle is one of rubber-coated steel particles, acrylic particles, or stainless steel particles.

7. The volute assembly according to claim 5, characterized in that: The number of the second guide rails is two. The two second guide rails are arranged side by side in the radial direction of the circular volute so that a second limiting groove is formed between the two second guide rails. Each second guide rail is provided with a second sliding groove, which extends in the circumferential direction of the circular volute. The second sliding member is slidably located in the second limiting groove in the circumferential direction of the volute, and the second sliding member is provided with second slide rails protruding from opposite sides in the radial direction of the volute. The second slide rails extend in the circumferential direction of the volute, and one second slide rail is slidably located in one second slide groove in the circumferential direction of the volute.

8. The volute assembly according to claim 7, characterized in that: The second slide groove is provided with second balls protruding from the opposite groove surface of the second slide rail in the axial direction of the volute. The second balls are rotatably supported on the groove surface of the second slide groove, so that the second slide rail clamps the second balls on opposite sides in the axial direction of the volute; or, the groove circumferential surface of the second slide groove is provided with a third lubricating coating to form a second lubricating groove, and a second slide rail is slidably located in a second lubricating groove in the circumferential direction of the volute. And / or, the second guide rail is provided with a fourth lubricating coating on the side of the second sliding member in the radial direction of the volute.

9. A fan assembly, comprising a centrifugal impeller and a volute assembly, characterized in that: The volute assembly is the volute assembly according to any one of claims 1 to 8 above; The centrifugal impeller is located inside the volute air duct of the volute assembly.

10. An air conditioning system, including a fan unit, characterized in that: The fan device is the fan device described in claim 9.

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