Wheel cover assembly, turbine assembly and air circulator

Abstract

The application provides a wheel cover assembly, a turbine assembly and an air circulating machine. The wheel cover assembly comprises a wheel cover body (1) and an end cover (2), a gas guiding cavity (3) is formed on one side of the wheel cover body (1), the gas guiding cavity (3) is open on one side, the end cover (2) is arranged on the open side of the gas guiding cavity (3) and seals the gas guiding cavity (3) to form a sealed cavity, a gas guiding opening (4) and an exhaust opening (5) are arranged on the side wall of the wheel cover body (1), and high-temperature gas enters the gas guiding cavity (3) through the gas guiding opening (4) and is discharged from the exhaust opening (5). According to the wheel cover assembly, the residence time of high-temperature air in the wheel cover assembly can be prolonged, the high-temperature air can heat the wheel cover assembly more effectively, and the deicing efficiency of the wheel cover assembly is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioning, in particular to a wheel cover assembly, a turbine assembly and an air circulating machine. BACKGROUND

[0002] The air circulating machine uses the turbine assembly to expand and cool the high-temperature pressurized air delivered by the compressor. By adjusting the air flow into the turbine assembly, the speed of the air circulating machine is adjusted, thereby adjusting the outlet temperature of the turbine assembly. When the outlet temperature of the turbine assembly is low, the water in the air will become condensed water or even ice, which will damage the turbine blades and cause the original rotor dynamic balance state to fail, resulting in vibration or even damage to the unit. Therefore, in order to prevent the turbine blades from being damaged by ice crystals, measures must be taken to prevent the turbine from icing. The existing product scheme is to heat the turbine wheel cover with part of the high-temperature air output by the compressor to prevent icing. This part of the high-temperature air flows out after flowing through the wheel cover.

[0003] However, due to the structure of the wheel cover, the high-temperature air stays in the wheel cover position for a short time, so it is difficult to effectively heat the wheel cover, and the ice removal effect of the turbine is not good. SUMMARY

[0004] Therefore, the technical problem to be solved by the present application is to provide a wheel cover assembly, a turbine assembly and an air circulating machine, which can increase the residence time of high-temperature air in the wheel cover assembly, so that the high-temperature air can more effectively heat the wheel cover assembly and ensure the ice removal efficiency of the wheel cover assembly.

[0005] In order to solve the above problems, the present application provides a wheel cover assembly, which comprises a wheel cover body and an end cover. One side of the wheel cover body is provided with an air guiding cavity, one side of the air guiding cavity is open, and the end cover is arranged on the open side of the air guiding cavity and seals the air guiding cavity to form a sealed cavity. An air guiding port and an exhaust port are arranged on the side wall of the wheel cover body. High-temperature gas enters the air guiding cavity through the air guiding port and is discharged from the exhaust port.

[0006] Preferably, the exhaust port is provided with a one-way valve which opens when the pressure in the air guiding cavity reaches a preset pressure.

[0007] Preferably, the air guiding cavity is an annular cavity.

[0008] Preferably, the bottom of the air guiding cavity is provided with an annular groove, and the width of the annular groove is smaller than the width of the air guiding cavity.

[0009] Preferably, the air guiding cavity extends from a first end to a second end of the wheel cover body, and the first end is open and the second end is closed.

[0010] Preferably, the air guiding port and the exhaust port are located at the same axial position or different axial positions of the wheel cover body.

[0011] Preferably, the wheel cover body has an inner hole, and the end cover is provided with a drainage taper surface corresponding to the position of the inner hole.

[0012] Preferably, the side of the wheel cover body matched with the end cover is provided with a first flange, the first flange is provided with a first mounting hole, the end cover is provided with a second mounting hole corresponding to the first mounting hole, and the first flange and the end cover are fixedly connected through bolts arranged in the first mounting hole and the second mounting hole.

[0013] Preferably, the one-way valve comprises a valve body, a valve core and an exhaust hole, the valve body is fixedly arranged at the exhaust port, the valve core is slidably arranged in the valve body, when the pressure in the air guiding cavity is less than a preset pressure, the valve core can close the exhaust hole, and when the pressure in the air guiding cavity is greater than or equal to the preset pressure, the valve core can open the exhaust hole.

[0014] Preferably, the one-way valve further comprises a guide hole and a return structure, the valve core can slide along the guide of the guide hole, and the return structure is arranged between the valve core and the valve body and can provide the valve core with a force to close the exhaust hole.

[0015] Preferably, the return structure comprises a spring, the spring is sleeved outside the valve core, one end of the spring abuts against the valve body, and the other end of the spring abuts against the valve core.

[0016] Preferably, the valve body is further provided with a mounting cavity, and one end of the spring is fixedly mounted in the mounting cavity.

[0017] Preferably, the valve core is of a stepped structure, a top of the valve core is a sealing cover plate, the sealing cover plate is in sliding sealing cooperation with an inner wall of the valve body, the exhaust hole is located on a movement path of the sealing cover plate, when the sealing cover plate moves to a side of the exhaust hole close to the exhaust port, the sealing cover plate closes the exhaust hole, and when the sealing cover plate moves to a side of the exhaust hole away from the exhaust port, the sealing cover plate opens the exhaust hole.

[0018] Preferably, the wheel cover body is provided with an exhaust nozzle, the exhaust port is located on the exhaust nozzle, and the valve body is screw-fixed on the exhaust nozzle.

[0019] According to another aspect of the present application, a turbine assembly is provided, comprising a volute and a wheel cover assembly, the wheel cover assembly being the wheel cover assembly described above, and the volute and the wheel cover assembly are arranged in a split manner.

[0020] According to another aspect of the present application, an air circulating machine is provided, comprising a turbine assembly, the turbine assembly being the turbine assembly described above.

[0021] The wheel cover assembly provided by the application comprises a wheel cover body and an end cover. An air guiding cavity is formed on one side of the wheel cover body. The air guiding cavity is open on one side. The end cover is arranged on the open side of the air guiding cavity and seals the air guiding cavity to form a sealed cavity. An air guiding hole and an exhaust hole are arranged on the side wall of the wheel cover body. High-temperature gas enters the air guiding cavity through the air guiding hole and is discharged from the exhaust hole. The split structure formed by the wheel cover body and the end cover forms a sealed air guiding cavity on the wheel cover body, so that the high-temperature gas has a longer flow path and flows through the air guiding cavity more fully, stays in the wheel cover body for a longer time, and can more effectively heat the turbine in the wheel cover body, thereby prolonging the heating time and improving the heating efficiency of the high-temperature gas on the turbine assembly, greatly reducing the icing of the turbine assembly, and ensuring the deicing efficiency of the wheel cover assembly. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 FIG. 1 is a structural schematic diagram of a wheel cover assembly according to an embodiment of the application;

[0023] Figure 2 FIG. 2 is a structural schematic diagram of a wheel cover body of the wheel cover assembly according to the embodiment of the application;

[0024] Figure 3 FIG. 3 is a sectional structural schematic diagram of the wheel cover body of the wheel cover assembly according to the embodiment of the application;

[0025] Figure 4 FIG. 4 is a side structural schematic diagram of the wheel cover body of the wheel cover assembly according to the embodiment of the application;

[0026] Figure 5 FIG. 5 is a half-sectional structural schematic diagram of the wheel cover body of the wheel cover assembly according to the embodiment of the application;

[0027] Figure 6 FIG. 6 is a structural schematic diagram of an end cover of the wheel cover assembly according to the embodiment of the application;

[0028] Figure 7 FIG. 7 is a sectional structural schematic diagram of the end cover of the wheel cover assembly according to the embodiment of the application;

[0029] Figure 8 FIG. 8 is a structural schematic diagram of a one-way valve of the wheel cover assembly according to the embodiment of the application;

[0030] Figures 9 to 11 FIG. 9 is a gas flow structural schematic diagram of the wheel cover assembly according to the embodiment of the application.

[0031] The reference signs are as follows:

[0032] 1, wheel cover body; 2, end cover; 3, air induction cavity; 4, air induction port; 5, exhaust port; 6, annular groove; 7, first flange; 8, first mounting hole; 9, second mounting hole; 10, valve body; 11, valve core; 12, exhaust hole; 13, spring; 14, guide hole; 15, mounting cavity; 16, exhaust nozzle; 17, sealing cover plate; 18, drainage cone surface. DETAILED DESCRIPTION

[0033] BRIEF DESCRIPTION OF DRAWINGS Figures 1 to 11 As shown, according to the embodiment of the present application, the wheel cover assembly includes a wheel cover body 1 and an end cover 2, one side of the wheel cover body 1 is provided with an air induction cavity 3, one side of the air induction cavity 3 is open, the end cover 2 is arranged at the open side of the air induction cavity 3 and seals the air induction cavity 3 to form a sealed cavity, and the side wall of the wheel cover body 1 is provided with an air induction port 4 and an exhaust port 5. High-temperature gas enters the air induction cavity 3 through the air induction port 4 and is discharged from the exhaust port 5.

[0034] The split structure of the wheel cover body 1 and the end cover 2 formed by the wheel cover assembly enables the formation of a sealed air induction cavity 3 on the wheel cover body 1, so that the high-temperature gas can have a longer flow path and flow through the air induction cavity 3 more fully, stay in the wheel cover body 1 for a longer time, and heat the turbine in the wheel cover body 1 more effectively, thereby increasing the heating time and heating efficiency of the high-temperature gas on the turbine assembly and greatly reducing the icing of the turbine assembly, ensuring the deicing efficiency of the wheel cover assembly.

[0035] In the present embodiment, the wheel cover body 1 and the end cover 2 of the wheel cover assembly adopt a split structure, which can facilitate the processing of the air induction cavity 3, reduce the structural complexity of the wheel cover assembly, and effectively reduce the mold development cost.

[0036] In one embodiment, the exhaust port 5 is provided with a one-way valve that opens when the pressure in the air induction cavity 3 reaches a preset pressure. In the present embodiment, by providing the one-way valve, the high-temperature gas entering the air induction cavity 3 can stay in the air induction cavity 3 for a long time, thereby increasing the residence time of the high-temperature gas in the wheel cover assembly and better heating the wheel cover assembly to prevent the turbine from icing.

[0037] In addition, the presence of the one-way valve can also facilitate the sealing of the high-temperature gas in the air induction cavity 3, and in the case of high pressure of the high-temperature gas, the high-temperature gas can be discharged in time. Due to the accumulation of high-temperature gas in the air induction cavity 3, the high-temperature gas in the wheel cover assembly can have a higher temperature and maintain a longer heating time, which is better for deicing the turbine.

[0038] In one embodiment, the air induction cavity 3 is an annular cavity, which can form a larger gas storage volume in the wheel cover body 1, can make the high-temperature gas effectively heat everywhere of the wheel cover body 1, and can store more high-temperature gas, can form more comprehensive heating to the turbine in the wheel cover assembly, and the deicing effect is better.

[0039] In one embodiment, the bottom of the air induction cavity 3 is provided with an annular groove 6, and the width of the annular groove 6 is smaller than the width of the air induction cavity 3. For the wheel cover body 1, at the end away from the opening of the air induction cavity 3, the inner hole is provided as an arc-shaped structure matched with the volute, the wall thickness of the wheel cover body 1 at this position is relatively thin due to the influence of the inner hole structure, therefore, if the air induction cavity 3 is continuously extended to the end of the wheel cover body 1, the wall thickness at this position will be thinned, and even the structure damage problem will occur. If no cavity for storing high-temperature gas is arranged at this position, the thick part of the wheel cover body 1 at this end will affect the heating efficiency of the high-temperature gas, and it is difficult to effectively heat the turbine at this end.

[0040] By arranging the annular groove 6 with small thickness at the bottom of the air induction cavity 3, the high-temperature gas can enter the end of the wheel cover body 1 away from the opening of the air induction cavity 3 as much as possible under the condition that the wheel cover body 1 has sufficient wall thickness, the gas can fully reach each position of the wheel cover body 1, more effectively increase the contact area of the wheel cover assembly and the high-temperature gas, increase the heat transfer efficiency, form more effective and comprehensive heating to the turbine in the wheel cover assembly, and meanwhile, by increasing the annular groove 6, the thickness of the wheel cover body 1 at this position can be reduced, which is more conducive to heat transfer. In order to further ensure the air induction effectiveness of the annular groove 6 and the structural strength of the wheel cover body 1, the annular groove 6 can be offset outward relative to the air induction cavity 3, and in some embodiments, the outer peripheral wall of the annular groove 6 can be flush with the outer peripheral wall of the air induction cavity 3, so that the wheel cover assembly can more fully induce the high-temperature gas, and the turbine can obtain better heating effect.

[0041] In one embodiment, the air induction cavity 3 extends from the first end to the second end of the wheel cover body 1, and is open at the first end and closed at the second end, avoiding the leakage of high-temperature gas, so that the high-temperature gas can stay in the air induction cavity 3 for a longer time, and form more effective heating and deicing effect to the turbine in the wheel cover assembly.

[0042] In one embodiment, the air induction port 4 and the exhaust port 5 are located at the same axial position or different axial positions of the wheel cover body 1.

[0043] In this embodiment, due to the presence of the one-way valve, the gas can stay in the air induction cavity 3 for a long enough time, therefore, the setting position of the air induction port 4 and the exhaust port 5 has little influence on the heating effect of the high-temperature gas, and the setting position is not limited, which can be more flexible and convenient.

[0044] In one embodiment, the wheel cover body 1 has an inner hole, and the end cover 2 is provided with a drainage taper 18 corresponding to the position of the inner hole. In this embodiment, the wheel cover body 1 is combined with the end cover 2 to realize the functions of heating the turbine and draining water, while reducing the difficulty of draining water.

[0045] In one embodiment, the side of the wheel cover body 1 combined with the end cover 2 is provided with a first flange 7, and the first flange 7 is provided with a first mounting hole 8. The end cover 2 is provided with a second mounting hole 9 corresponding to the first mounting hole 8, and the first flange 7 and the end cover 2 are fixedly connected by a bolt arranged in the first mounting hole 8 and the second mounting hole 9.

[0046] The first flange 7 can be an annular flange structure, and a plurality of first mounting holes 8 are uniformly arranged on the annular flange in the circumferential direction. The end cover 2 can also be provided with an annular flange structure, and a plurality of second mounting holes 9 are uniformly arranged on the annular flange of the end cover 2 in the circumferential direction corresponding to the first mounting holes 8, thereby facilitating the bolt connection between the wheel cover body 1 and the end cover 2.

[0047] The first flange 7 can also be a lug arranged on the outer circumferential side of the wheel cover body 1, and a plurality of lugs are uniformly and spacedly arranged on the outer circumferential side of the wheel cover body 1. Each lug is provided with a first mounting hole 8, and the outer circumferential side of the end cover 2 is also uniformly and spacedly provided with a plurality of lugs, each lug being provided with a second mounting hole 9. In this embodiment, the lug structure is used instead of the annular flange structure, which can reduce material consumption and reduce the weight of the wheel cover assembly.

[0048] In this embodiment, the number of lugs is six, and the six uniformly distributed mounting holes mount the end cover 2 on the end face of the wheel cover body 1 to realize the axial sealing of the heated gas. At the same time, the water generated by heating the turbine and the condensed water generated by the low temperature of the turbine can be discharged from the turbine assembly through the drainage taper 18.

[0049] In one embodiment, the one-way valve includes a valve body 10, a valve core 11, and an exhaust hole 12. The valve body 10 is fixedly arranged at the exhaust port 5, and the valve core 11 is slidably arranged in the valve body 10. When the pressure in the air induction cavity 3 is less than a preset pressure, the valve core 11 can close the exhaust hole 12. When the pressure in the air induction cavity 3 is greater than or equal to the preset pressure, the valve core 11 can open the exhaust hole 12. In this embodiment, the one-way valve has a pre-pressure, so that when the pressure in the air induction cavity 3 is less than the preset pressure, the valve core 11 will not open the exhaust hole 12, so that the high-temperature gas can accumulate in the air induction cavity 3 to more effectively heat the turbine in the wheel cover assembly.

[0050] In one embodiment, the one-way valve further comprises a guide hole 14 and a return structure, the valve core 11 can slide along the guide hole 14, and the return structure is arranged between the valve core 11 and the valve body 10, and can provide a force for the valve core 11 to close the exhaust hole 12. In this embodiment, the return structure can exert a return force on the exhaust hole 12 when the valve core 11 opens the exhaust hole 12, so that the valve core 11 has a tendency to close the exhaust hole 12, thereby returning to the position of closing the exhaust hole 12 when the pressure in the bleed air chamber 3 decreases, so that the high-temperature gas can accumulate in the bleed air chamber 3 again.

[0051] In one embodiment, the return structure comprises a spring 13, the spring 13 is sleeved outside the valve core 11, one end of the spring 13 abuts against the valve body 10, and the other end abuts against the valve core 11. In other embodiments, the return structure can also be other elastic members, such as elastic rubber, etc.

[0052] In one embodiment, the valve body 10 is further provided with a mounting cavity 15, and one end of the spring 13 is fixedly mounted in the mounting cavity 15. By arranging the mounting cavity 15, the installation of the spring 13 can be positioned, the installation and fixation of the spring 13 are facilitated, and the movement of the spring 13 can be guided by the mounting cavity 15, so that the spring 13 uniformly exerts force on each part of the valve core 11, and the inclination and jamming of the valve core 11 due to unbalanced force are avoided. In this embodiment, the mounting cavity 15 is an annular cavity.

[0053] In one embodiment, the valve core 11 is a stepped structure, the top of the valve core 11 is a sealing cover plate 17, the sealing cover plate 17 is in sliding sealing cooperation with the inner wall of the valve body 10, and the exhaust hole 12 is located on the movement path of the sealing cover plate 17. When the sealing cover plate 17 moves to the side close to the exhaust port 5 of the exhaust hole 12, the sealing cover plate 17 closes the exhaust hole 12, and when the sealing cover plate 17 moves to the side away from the exhaust port 5 of the exhaust hole 12, the sealing cover plate 17 opens the exhaust hole 12.

[0054] In this embodiment, the valve core 11 is arranged as a stepped structure, and only the top of the valve core 11 is arranged as a sealing cover plate, which can reduce the volume and weight of the valve core 11 as much as possible on the basis of ensuring the cooperation structure of the valve core 11 and the spring 13, and the sealing cooperation between the valve core 11 and the inner wall of the valve body 10 can be realized with smaller weight, so that the valve core 11 can more effectively seal the bleed air chamber 3, and ensure that the high-temperature gas stays in the bleed air chamber 3 for sufficient time.

[0055] In one embodiment, the wheel cover body 1 is provided with an exhaust nozzle 16, the exhaust port 5 is located on the exhaust nozzle 16, and the valve body 10 is screwed and fixed on the exhaust nozzle 16. In this embodiment, by providing the exhaust nozzle 16, the installation and fixation of the one-way valve on the wheel cover body 1 can be more convenient. The valve body 10 of the one-way valve and the exhaust nozzle 16 can also be clamped or welded, etc. When welding, water bubble welding is preferably used to prevent high-temperature welding from damaging internal parts.

[0056] The high-temperature gas flow process of the wheel cover assembly is as follows:

[0057] When the high-temperature air from the air compressor enters the bleed air cavity 3 through the bleed air port 4, the continuous high-temperature gas is stored inside the bleed air cavity 3, which heats the wheel cover assembly and prevents the turbine blades from icing. When the high-temperature gas storage in the bleed air cavity 3 is too much, it will be discharged from the exhaust port 5 by overcoming the elastic force of the spring 13 of the one-way valve, so that the valve core 11 moves downward. The high-temperature gas is discharged outside from the exhaust hole 12. After that, the pressure in the bleed air cavity 3 decreases, and the valve core 11 resets under the elastic force of the spring 13. The main function of the one-way valve is to increase the storage time of the high-temperature gas in the bleed air cavity 3, thereby greatly reducing the icing condition of the turbine under low-temperature conditions. At the same time, when the accumulated pressure of the high-temperature gas is too large, it overcomes the resistance of the one-way valve and facilitates the discharge of the excess high-temperature gas to the outside.

[0058] According to the embodiment of the present application, the turbine assembly comprises a volute and a wheel cover assembly, and the wheel cover assembly is the wheel cover assembly described above.

[0059] In this embodiment, the wheel cover assembly and the volute are made into a split structure, which is beneficial to reduce the weight of the volute and the cost of casting mold opening, and improve the process and economy.

[0060] According to the embodiment of the present application, the air circulating machine comprises a turbine assembly, and the turbine assembly is the turbine assembly described above.

[0061] Those skilled in the art will readily understand that the above-mentioned advantageous modes can be freely combined and superimposed without conflict.

[0062] The above is only a preferred embodiment of the present application, and is not intended to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application. The above is only a preferred embodiment of the present application, and it should be pointed out that those skilled in the art can make several improvements and modifications without departing from the technical principles of the present application, and these improvements and modifications shall be regarded as the protection scope of the present application.

Claims

1. A turbine assembly, comprising a volute and a wheel cover assembly, characterized in that, The volute and the wheel cover assembly are separately configured. The wheel cover assembly includes a wheel cover body (1) and an end cap (2). An air duct (3) is provided on one side of the wheel cover body (1). The air duct (3) is open on one side. The end cap (2) is located on the open side of the air duct (3) and closes the air duct (3) to form a sealed cavity. An air duct port (4) and an exhaust port (5) are provided on the side wall of the wheel cover body (1). After the high temperature gas enters the air duct (3) through the air duct port (4), it is discharged from the exhaust port (5). The air intake chamber (3) is an annular cavity; The bottom of the air duct (3) is provided with an annular groove (6), the width of which is less than the width of the air duct (3); the inner wall of the wheel cover body (1) has an arc-shaped section that cooperates with the volute, the arc-shaped section being located at the end of the wheel cover body (1) away from the opening of the air duct (3).

2. The turbine assembly according to claim 1, characterized in that, The exhaust port (5) is equipped with a one-way valve, which opens when the pressure in the air intake chamber (3) reaches a preset pressure.

3. The turbine assembly according to claim 1, characterized in that, The air duct (3) extends from the first end of the wheel cover body (1) to the second end, and is open at the first end and closed at the second end.

4. The turbine assembly according to claim 1, characterized in that, The air intake (4) and the exhaust port (5) are located at the same axial position or different axial positions of the wheel cover body (1).

5. The turbine assembly according to claim 1, characterized in that, The wheel cover body (1) has an inner hole, and the end cover (2) is provided with a drainage cone surface (18) corresponding to the position of the inner hole.

6. The turbine assembly according to claim 1, characterized in that, The wheel cover body (1) is provided with a first flange (7) on one side that mates with the end cover (2). The first flange (7) is provided with a first mounting hole (8). The end cover (2) is provided with a second mounting hole (9) corresponding to the first mounting hole (8). The first flange (7) and the end cover (2) are fixedly connected by bolts provided in the first mounting hole (8) and the second mounting hole (9).

7. The turbine assembly according to claim 2, characterized in that, The one-way valve includes a valve body (10), a valve core (11), and an exhaust port (12). The valve body (10) is fixedly disposed at the exhaust port (5). The valve core (11) is slidably disposed within the valve body (10). When the pressure in the air venting chamber (3) is less than the preset pressure, the valve core (11) can close the exhaust port (12). When the pressure in the air venting chamber (3) is greater than or equal to the preset pressure, the valve core (11) can open the exhaust port (12).

8. The turbine assembly according to claim 7, characterized in that, The one-way valve also includes a guide hole (14) and a return structure. The valve core (11) can slide along the guide hole (14). The return structure is disposed between the valve core (11) and the valve body (10) and can provide the valve core (11) with a force to close the exhaust hole (12).

9. The turbine assembly according to claim 8, characterized in that, The return structure includes a spring (13), which is sleeved on the valve core (11). One end of the spring (13) abuts against the valve body (10), and the other end abuts against the valve core (11).

10. The turbine assembly according to claim 9, characterized in that, The valve body (10) is also provided with a mounting cavity (15), and one end of the spring (13) is fixedly installed in the mounting cavity (15).

11. The turbine assembly according to claim 7, characterized in that, The valve core (11) has a stepped structure. The top of the valve core (11) is a sealing cover plate (17). The sealing cover plate (17) slides and seals with the inner wall of the valve body (10). The exhaust hole (12) is located on the movement path of the sealing cover plate (17). When the sealing cover plate (17) moves to the side of the exhaust hole (12) close to the exhaust port (5), the sealing cover plate (17) closes the exhaust hole (12). When the sealing cover plate (17) moves to the side of the exhaust hole (12) away from the exhaust port (5), the sealing cover plate (17) opens the exhaust hole (12).

12. The turbine assembly according to claim 7, characterized in that, The wheel cover body (1) is provided with an exhaust nozzle (16), the exhaust port (5) is located on the exhaust nozzle (16), and the valve body (10) is screwed and fixed on the exhaust nozzle (16).

13. An air circulator, comprising a turbine assembly, characterized in that, The turbine assembly is the turbine assembly according to any one of claims 1 to 12.

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