Pneumatic turbine structure

Abstract

The utility model discloses a pneumatic turbine structure which comprises a rotating body and an air injection device. The rotating body is provided with an inner cavity. The air injection device is arranged in the inner cavity, the inner cavity is provided with a plurality of tooth parts around the rotating axis of the rotating body and around the air injection device, the roots of all the tooth parts are connected with the rotating body to form an inner tooth turbine structure, and the air injection device is used for injecting air flow to the surfaces of the tooth parts to drive the rotating body to rotate. The pneumatic turbine structure provided by the utility model is more compact in structure, is beneficial to the lightweight design requirement of products, and can reduce the power loss of airflow and improve the torsion output efficiency.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic device technology, and in particular to a pneumatic turbine structure. Background Technology

[0002] Traditional pneumatic turbines, such as radial turbines or axial turbines, have an internal rotor as their rotating body, with the jetting device arranged around the rotating body. The blades on the rotating body form an external tooth structure on the outer periphery of the rotor. However, this type of pneumatic turbine with an external tooth structure has a large overall size, which is not conducive to the requirements of lightweight product design. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a pneumatic turbine structure that is more compact and facilitates the lightweight design requirements of products.

[0004] According to an embodiment of the present invention, a pneumatic turbine structure includes a rotating body and an air jet device. The rotating body has an inner cavity. The air jet device is disposed in the inner cavity. The inner cavity has a plurality of teeth arranged around the air jet device about the rotation axis of the rotating body. The roots of all the teeth are connected to the rotating body to form an internal tooth turbine structure. The air jet device is used to spray airflow onto the surface of the teeth to drive the rotating body to rotate.

[0005] The pneumatic turbine structure according to the embodiments of the present utility model has at least the following beneficial effects: by setting the jet device in the inner cavity of the rotating body and setting the teeth in the inner side of the rotating body to form an internal tooth turbine structure, the space occupied by the jet device on the outer side of the rotating body can be eliminated, so that under the same rotating body size specifications, the overall size of the pneumatic turbine structure is smaller and the structure is more compact, which is conducive to the lightweight design requirements of the product.

[0006] According to some embodiments of the present invention, the projection of the tooth portion along the rotation axis of the rotating body is a spiral tooth shape.

[0007] According to some embodiments of this utility model, the teeth are straight teeth, helical teeth, or arc teeth.

[0008] According to some embodiments of the present invention, the jet direction of the jet device is adapted to the rotation direction of the tooth, and the jet direction of the jet device is inclined relative to the radial direction of the rotating body.

[0009] According to some embodiments of the present invention, the teeth have mutually opposing air guiding surfaces and actuating surfaces, the air guiding surfaces being adapted to the jet direction of the jet device, wherein, in two adjacent teeth, the air guiding surface of one tooth is connected to the actuating surface of the other tooth.

[0010] According to some embodiments of the present invention, the teeth are provided with exhaust channels on one or both sides along the rotation axis of the rotating body, and the exhaust channels are in communication with the inner cavity.

[0011] According to some embodiments of this utility model, it further includes a mounting body, the rotating body being rotatably sleeved on the mounting body, wherein one end of the mounting body passes through the bottom wall of the inner cavity, the jet device is mounted on the mounting body, the mounting body is provided with a boss opposite to the rotating body, the gap between the boss and the rotating body forms an exhaust channel communicating with the inner cavity, and the gap between one end of the mounting body and the bottom wall of the inner cavity and the gap between the bottom wall of the inner cavity and the jet device communicate to form an exhaust channel.

[0012] According to some embodiments of the present invention, the jetting device is provided with an air intake channel and at least two jetting channels communicating with the air intake channel, the jetting channels being used to jet airflow onto the teeth.

[0013] According to some embodiments of the present invention, the air intake channel is equipped with a filter.

[0014] According to some embodiments of the present invention, the pneumatic turbine structure further includes a housing, and the rotating body is rotatably mounted inside the housing via bearings.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0017] Figure 1 This is a radial cross-sectional schematic diagram of the pneumatic turbine structure according to an embodiment of the present invention;

[0018] Figure 2 for Figure 1 A schematic diagram of the rotating body of the aerodynamic turbine structure is shown;

[0019] Figure 3 for Figure 1 A schematic diagram of the jet device with a pneumatic turbine structure is shown;

[0020] Figure 4 This is a schematic diagram of the axial section of the pneumatic turbine structure (with a mounting body) according to an embodiment of the present utility model;

[0021] Figure 5This is a schematic diagram of the axial section of the pneumatic turbine structure (with a housing) according to an embodiment of the present invention.

[0022] Figure label:

[0023] Rotating body 100, inner cavity 110, teeth 111, air guide surface 111a, actuating surface 111b, jet device 200, air intake channel 210, jet channel 220, filter element 300, mounting body 400, boss 410, air supply channel 420, exhaust channel 500, outer shell 600, sliding seat 610, bearing 700, first dynamic sealing structure 810, second dynamic sealing structure 820. Detailed Implementation

[0024] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0025] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0027] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0028] Reference Figures 1 to 3According to an embodiment of the present invention, the pneumatic turbine structure includes a rotating body 100 and a jet device 200. The rotating body 100 has an inner cavity 110. The jet device 200 is disposed in the inner cavity 110. The inner cavity 110 has a plurality of teeth 111 arranged around the rotation axis of the rotating body 100. The root of all the teeth 111 is connected to the rotating body 100 to form an internal tooth turbine structure. The jet device 200 is used to jet airflow onto the surface of the teeth 111 to drive the rotating body 100 to rotate.

[0029] By setting the jet device 200 in the inner cavity 110 of the rotating body 100 and setting the teeth 111 on the inner side of the rotating body 100 to form an internal tooth turbine structure, the space occupied by the jet device 200 on the outer side of the rotating body 100 can be eliminated. Under the same size specifications of the rotating body 100, the overall size of the pneumatic turbine structure is smaller and the structure is more compact, which is conducive to the lightweight design requirements of the product. In addition, the teeth 111 are set in the inner cavity 110 of the rotating body 100, so that the teeth 111 can directly utilize the high-speed rotating airflow ejected by the jet device 200 in the inner cavity 110, eliminating the need to set the guide structure on the outer side of the rotating body 100, reducing the power loss of the airflow and improving the torque output efficiency.

[0030] Reference Figure 1 and Figure 2 According to some embodiments of the present invention, the projection of the tooth 111 along the rotation axis of the rotating body 100 is spiral-shaped. As a result, the end of the tooth 111 near the jet device 200 is small in size while the root of the tooth 111 is large in size. The tooth 111 has higher strength, can withstand greater jet pressure, and has a longer service life.

[0031] Reference Figure 1 and Figure 2 According to some embodiments of the present invention, the tooth 111 is a straight tooth, that is, the tooth 111 extends in a straight line along the rotation axis of the rotating body 100. With the above configuration, the tooth 111 has a simple structure and is easy to produce using molds.

[0032] like Figure 1 As shown, according to some embodiments of the present invention, the tooth 111 and the rotating body 100 can be integrally formed, thereby further reducing production costs. Specifically, to facilitate differentiation of the tooth 111, the boundary between the tooth 111 and the rotating body 100 is defined as follows: Figure 1 The middle circle is shown by a dashed line.

[0033] It should be noted that in some other embodiments, the tooth 111 and the rotating body 100 can also be manufactured separately and then assembled. During assembly, bolts, snap-fit, plug-in or other methods can be used.

[0034] According to some other embodiments of the present invention, the tooth 111 can also be configured as a helical tooth or an arc tooth, and the specific shape can refer to the helical tooth or arc tooth structure of a gear.

[0035] Reference Figure 1 , Figure 3 and Figure 4 According to some embodiments of the present invention, the jet device 200 is provided with an air intake channel 210 and at least two jet channels 220 communicating with the air intake channel 210. The jet channels 220 are used to jet airflow into the toothed portion 111. With the above configuration, the jet device 200 may include a main body, which integrates all the air intake channels 210 and all the jet channels 220. The outer periphery of the main body may be circular. Therefore, the jet device 200 has lower production costs and is easier to install.

[0036] Reference Figure 4 According to some embodiments of the present invention, the air intake channel 210 is equipped with a filter element 300. Thus, the filter element 300 can filter the airflow entering the air intake channel 210 and prevent impurities in the airflow from clogging the jet device 200.

[0037] Reference Figure 1 According to some embodiments of the present invention, the jet direction of the jet device 200 is adapted to the rotation direction of the tooth 111, thereby ensuring that the airflow ejected by the jet device 200 can drive the rotating body 100 to rotate after hitting the tooth 111.

[0038] Reference Figure 1 According to some embodiments of the present invention, the jet direction of the jet device 200 is inclined relative to the radial direction of the rotating body 100 in order to optimize the airflow direction, reduce the power loss of the airflow, and improve the torque output efficiency of the pneumatic turbine structure.

[0039] Specifically, such as Figure 1 As shown, in a certain radial direction of the rotating body 100 (i.e. Figure 1 The direction represented by the horizontal centerline is perpendicular to the line connecting the center of the rotating body 100 to the point where the jet passage 220 and the intake passage 210 are connected. The jet passage 220 is inclined relative to this radial direction, and the inclination angle α between the jet direction of the jet passage 220 and this radial direction is 5-30°.

[0040] Reference Figure 1 and Figure 2According to some embodiments of the present invention, the tooth 111 has a guide surface 111a and an actuating surface 111b that are opposite to each other. The guide surface 111a is adapted to the jet direction of the jet device 200. In two adjacent teeth 111, the guide surface 111a of one tooth 111 is connected to the actuating surface 111b of the other tooth 111. Thus, the guide surface 111a of one tooth 111 can guide the airflow ejected by the jet device 200 to the actuating surface 111b of the other tooth 111, thereby optimizing the flow path of the airflow and further improving the torque output efficiency of the aerodynamic turbine structure.

[0041] Reference Figure 1 and Figure 2 In some embodiments, the projection of the actuating surface 111b in the direction along the rotation axis of the rotating body 100 is arc-shaped, so that the actuating surface 111b can receive the power of the airflow more effectively, increase the torque output of the pneumatic turbine structure, and further improve the torque output efficiency of the pneumatic turbine structure.

[0042] Reference Figure 1 and Figure 2 In the specific implementation process, in order to ensure that the air guide surface 111a is adapted to the jet direction of the jet device 200, the air guide surface 111a of all teeth 111 is vortex-shaped. The air guide surface 111a faces the jet device 200 and can be set along the jet direction of the jet device 200. When a certain jet channel 220 of the jet device 200 sprays airflow to a certain air guide surface 111a, the angle between the jet direction of the jet channel 220 and the air guide surface 111a is less than 30°, thereby reducing the airflow power loss caused by the air guide surface 111a.

[0043] It should be noted that in some other embodiments, the teeth 111 described above can also be configured as blades, that is, the teeth 111 are configured as arc-shaped blades, and all blades are distributed in a vortex shape.

[0044] Reference Figure 4 According to some embodiments of the present invention, the tooth 111 is provided with an exhaust channel 500 on one or both sides along the rotation axis of the rotating body 100. The exhaust channel 500 is connected to the inner cavity 110. By setting the exhaust channel 500 of the rotating body 100 on the outside of the tooth 111, the airflow ejected by the jet device 200 will not be directly discharged between two adjacent teeth 111 after acting on the tooth 111. As a result, the tooth 111 can receive more power from the airflow and improve the working efficiency.

[0045] Reference Figure 4 and Figure 5According to some embodiments of the present invention, the pneumatic turbine structure further includes a mounting body 400, and a rotating body 100 is rotatably sleeved on the mounting body 400. One end of the mounting body 400 passes through the bottom wall of the inner cavity 110. The jet device 200 is mounted on the mounting body 400. The mounting body 400 is provided with a boss 410 opposite to the rotating body 100. The gap between the boss 410 and the rotating body 100 forms an exhaust channel 500 communicating with the inner cavity 110. The gap between one end of the mounting body 400 and the bottom wall of the inner cavity 110 and the gap between the bottom wall of the inner cavity 110 and the jet device 200 communicate to form the exhaust channel 500. With the above configuration, when the two exhaust channels 500 discharge airflow, the rotating body 100 and the mounting body 400 can be separated by the airflow. When the jet device 200 sprays airflow to the tooth section 111, the rotating body 100 and the jet device 200 can also be separated by the airflow. Thus, the rotating body 100 is suspended relative to the mounting body 400 and the jet device 200, reducing the friction experienced by the rotating body 100 during rotation, reducing the noise and wear of the rotating body 100 during rotation, and enabling the rotating body 100 to rotate at high speed.

[0046] According to some embodiments of the present invention, the air inlet of the air intake channel 210 is annular, and the filter element 300 is disposed at the air inlet of the air intake channel 210. With the above arrangement, the filter element 300 is easier to install and remove, and the air intake channel 210 can deliver airflow to each jet channel 220 more evenly.

[0047] In the specific implementation process, the mounting body 400 is provided with an air supply channel 420. The outlet of the air supply channel 420 is located on the side of the boss 410 facing the jet device 200. The outlet of the air supply channel 420 is annular. The air inlet of the air intake channel 210 is located on the side of the jet device 200 facing the boss 410. The outlet of the air supply channel 420 is connected to the air inlet of the air intake channel 210. The jet device 200 is fitted and sealed with the boss 410.

[0048] It is conceivable that the pneumatic turbine structure can be configured as a multi-stage pneumatic turbine. In this case, the rotating body 100 can be configured with two or more along the axis, and the jet device 200 can be configured with two or more jet channels 220, or the jet device 200 can be configured with two or more.

[0049] Reference Figure 5According to some embodiments of this utility model, the pneumatic turbine structure may further include a housing 600, a mounting body 400 installed inside the housing 600, and a rotating body 100 rotatably mounted inside the housing 600 via a bearing 700. The gap between the housing 600 and the rotating body 100 communicates with the exhaust passage 500 between the boss 410 and the rotating body 100, so as to exhaust air through the gap between the housing 600 and the rotating body 100. Thus, the housing 600 can protect the rotating body 100, bearing 700, and other components inside.

[0050] Reference Figure 5 In some embodiments, a first dynamic sealing structure is provided between the rotating body 100 and the outer shell 600. When the jet device 200 drives the rotating body 100 to rotate, the first dynamic sealing structure opens the gap between the rotating body 100 and the outer shell 600. When the jet device 200 stops driving the rotating body 100 to rotate, the first dynamic sealing structure closes the gap between the rotating body 100 and the outer shell 600, thereby preventing external dust from entering the gap between the rotating body 100 and the outer shell 600, so as to prevent dust from affecting the normal operation of components such as the bearing 700 and the rotating body 100.

[0051] Reference Figure 4 and Figure 5 It is conceivable that, in some embodiments, the gap between one end of the mounting body 400 and the bottom wall of the inner cavity 110 can also be configured with a second dynamic sealing structure 820. When the jet device 200 drives the rotating body 100 to rotate, the second dynamic sealing structure 820 opens the gap between one end of the mounting body 400 and the bottom wall of the inner cavity 110 to allow exhaust. When the jet device 200 stops driving the rotating body 100 to rotate, the second dynamic sealing structure 820 closes the gap between one end of the mounting body 400 and the bottom wall of the inner cavity 110, thereby preventing external dust from entering the gap between one end of the mounting body 400 and the bottom wall of the inner cavity 110.

[0052] The second dynamic sealing structure 820 can be configured as a movable sealing structure, at least a portion of which is movable to open or close the corresponding gap.

[0053] Reference Figure 4 and Figure 5 The rotating body 100 can be configured as a movable component. In this case, a sliding seat 610 is slidably mounted inside the housing 600, and the rotating body 100 is rotatably mounted on the sliding seat 610 via a bearing 700. Thus, the movement of the rotating body 100 along the rotation axis can drive a portion of the movable sealing structure to move. Of course, in other embodiments, a portion of the movable sealing structure can also be configured as an independent movable component. In specific implementation, the movable component can be moved by an external drive, by airflow, or by other means.

[0054] It is conceivable that, in other embodiments, the second dynamic sealing structure 820 may also be configured as an airbag-type sealing structure, which can be expanded or contracted by inflating or deflating air to close or open the corresponding gap.

[0055] The first dynamic sealing structure can refer to the setting of the second dynamic sealing structure 820. The specific setting method will not be described in detail here.

[0056] It should be noted that when the pneumatic turbine structure does not have a mounting body 400 and a housing 600, a limiting structure can be provided between the jet device 200 and the rotating body 100 to prevent them from separating; when the pneumatic turbine structure has a mounting body 400 but does not have a housing 600, a limiting structure can be provided between the mounting body 400 and the rotating body 100 to prevent the jet device 200 from separating from the rotating body 100. The limiting structure can be provided in more than one way; for example, the limiting structure can be a bearing 700, or the limiting structure can include an annular limiting protrusion.

[0057] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0058] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A pneumatic turbine structure, characterized in that, include: A rotating body (100) having an inner cavity (110); An air jet device (200) is disposed in the inner cavity (110); The inner cavity (110) has multiple teeth (111) arranged around the rotation axis of the rotating body (100) around the jet device (200). The root of all the teeth (111) is connected to the rotating body (100) to form an internal tooth turbine structure. The jet device (200) is used to spray airflow onto the surface of the teeth (111) to drive the rotating body (100) to rotate.

2. The pneumatic turbine structure according to claim 1, characterized in that, The projection of the tooth (111) along the rotation axis of the rotating body (100) is spiral-shaped.

3. The pneumatic turbine structure according to claim 2, characterized in that, The teeth (111) are straight teeth, helical teeth, or arc teeth.

4. The pneumatic turbine structure according to claim 1, characterized in that, The jetting direction of the jetting device (200) is adapted to the rotation direction of the tooth (111), and the jetting direction of the jetting device (200) is inclined relative to the radial direction of the rotating body (100).

5. The pneumatic turbine structure according to claim 1, characterized in that, The tooth (111) has a guide surface (111a) and an actuating surface (111b) that are opposite to each other. The guide surface (111a) is adapted to the jet direction of the jet device (200). In two adjacent teeth (111), the guide surface (111a) of one tooth (111) is connected to the actuating surface (111b) of the other tooth (111).

6. The pneumatic turbine structure according to claim 1, characterized in that, The tooth (111) has an exhaust channel (500) on one or both sides along the rotation axis of the rotating body (100), and the exhaust channel (500) communicates with the inner cavity (110).

7. The pneumatic turbine structure according to claim 6, characterized in that, It also includes a mounting body (400), on which the rotating body (100) is rotatably sleeved. One end of the mounting body (400) passes through the bottom wall of the inner cavity (110). The jet device (200) is mounted on the mounting body (400). The mounting body (400) is provided with a boss (410) opposite to the rotating body (100). The gap between the boss (410) and the rotating body (100) forms an exhaust channel (500) communicating with the inner cavity (110). The gap between one end of the mounting body (400) and the bottom wall of the inner cavity (110) and the gap between the bottom wall of the inner cavity (110) and the jet device (200) communicate to form the exhaust channel (500).

8. The pneumatic turbine structure according to claim 1, characterized in that, The jet device (200) is provided with an air intake channel (210) and at least two jet channels (220) communicating with the air intake channel (210), the jet channels (220) being used to jet airflow onto the teeth (111).

9. A pneumatic turbine structure according to claim 8, characterized in that, The air intake passage (210) is equipped with a filter element (300).

10. The pneumatic turbine structure according to claim 1, characterized in that, It also includes a housing (600), and the rotating body (100) is rotatably mounted inside the housing (600) via bearings.

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