Reaming sealing structure of air motor

Abstract

The utility model discloses a chambering sealing structure of an air motor, which comprises a shell and a main shaft arranged in the shell, one end of the main shaft penetrates through the shell and extends out of the shell, the bottom of the shell is provided with an air inlet and an air inlet channel communicated with the air inlet, the outer side of the air inlet is provided with a trumpet-shaped chambering groove, and the chambering groove is communicated with the air inlet channel. The inner diameter of the air inlet channel is gradually increased in the air inlet direction. An annular sealing groove is formed in the side wall of the reaming groove, an O-shaped rubber sealing ring is embedded in the sealing groove, and the outer diameter of the rubber sealing ring is larger than the depth of the sealing groove. The reaming groove of the air inlet plays a good role in guiding compressed air, and meanwhile, the structural strength and the air inlet efficiency of the reaming groove are reasonably balanced, so that the compressed air can stably enter the air inlet channel from the outer side of the air inlet; the inner diameter of the air inlet channel is gradually increased in the air inlet direction, so that compressed air can be gradually diffused in the flowing process, the resistance of airflow is reduced, the compressed air can enter the motor more smoothly, and the air inlet efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of air motor technology, specifically to an enlarged-hole sealing structure for an air motor. Background Technology

[0002] An air motor, also known as a pneumatic motor or air-powered motor, is a device that converts the pressure energy of compressed air into rotational mechanical energy. Because the rotor is suspended by the air suspension during operation and has no physical contact with other components, it is not affected by the frictional heat generated by traditional mechanical bearings and can achieve extremely high speeds.

[0003] In the current field of air motor technology, there are certain defects in the air intake and sealing structures of air motors. On the one hand, the design of the air intake port and intake duct of traditional air motors is not reasonable enough, which may cause compressed air to encounter greater resistance when entering the motor, resulting in low intake efficiency and insufficient airflow, thus affecting the working performance and efficiency of the air motor. On the other hand, the design of the sealing structure may be inadequate, with poor sealing effect, making it prone to air leakage. This not only reduces the working efficiency of the air motor but may also pose safety hazards and affect the service life of the air motor. Utility Model Content

[0004] The purpose of this invention is to solve the problems existing in the air intake structure and sealing structure of air motors, and to provide an enlarged hole sealing structure for air motors.

[0005] This utility model achieves the above-mentioned objective through the following technical solution: an enlarged-hole sealing structure for an air motor, comprising a housing and a main shaft disposed inside the housing, one end of the main shaft passing through the housing and extending outside the housing, the bottom of the housing being provided with an air inlet and an air intake passage communicating with the air inlet, an enlarged-hole groove in the shape of a trumpet being formed on the outer side of the air inlet, the inner diameter of the air intake passage gradually increasing along the air intake direction; an annular sealing groove being formed on the side wall of the enlarged-hole groove, an O-ring rubber sealing ring being embedded in the sealing groove, the outer diameter of the rubber sealing ring being greater than the depth of the sealing groove.

[0006] Furthermore, the angle between the trumpet-shaped generatrix of the enlarged slot and the axis of the air inlet is 15°-30°.

[0007] Furthermore, the angle between the generatrix of the air intake and the axis of the air intake is 1°-3°.

[0008] Furthermore, the inner wall of the air intake is polished, with a surface roughness Ra≤0.8μm.

[0009] Furthermore, the depth of the sealing groove is 75%-85% of the outer diameter of the rubber sealing ring, and the width of the sealing groove is 0.2-0.5mm larger than the cross-sectional diameter of the rubber sealing ring.

[0010] Furthermore, a spiral guide groove is provided on the inner wall of the air intake duct, and the spiral direction of the spiral guide groove is consistent with the flow direction of compressed air in the air intake duct.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. The angle between the trumpet-shaped generatrix of the expansion slot and the axis of the air inlet is 15°-30°. This angle range ensures that the expansion slot effectively guides the compressed air while balancing the structural strength and intake efficiency of the expansion slot. This allows compressed air to smoothly enter the intake duct from the outside of the air inlet, reducing airflow impact and energy loss. The inner diameter of the intake duct gradually increases along the intake direction. This design allows the compressed air to gradually diffuse during flow, reducing airflow resistance and allowing the compressed air to enter the motor more smoothly, thereby improving intake efficiency.

[0013] 2. The depth of the sealing groove is 75%-85% of the outer diameter of the rubber sealing ring, and the width of the sealing groove is 0.2-0.5mm larger than the cross-sectional diameter of the rubber sealing ring. This dimensional design allows the rubber sealing ring to obtain a suitable amount of compression within the sealing groove, ensuring sufficient elasticity for a good sealing effect while avoiding problems such as seal failure or damage to the sealing ring due to excessive or insufficient compression, further improving the reliability and stability of the sealing structure.

[0014] 3. The inner wall of the intake duct is provided with a spiral guide groove, and the spiral direction is consistent with the flow direction of compressed air in the intake duct. This guide groove can guide the compressed air to form a spiral flow, making the airflow distribution more uniform and stable, further optimizing the airflow state and improving the intake efficiency. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a bottom view of the present invention;

[0017] Figure 3 for Figure 2 Sectional view of AA.

[0018] In the diagram: 1-House, 2-Main shaft, 3-Air inlet, 4-Air intake duct, 5-Expanding groove, 6-Sealing groove, 7-Rubber sealing ring. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation 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.

[0021] Combination Figures 1 to 3 The diagram illustrates an enlarged-hole sealing structure for an air motor, comprising a housing 1 and a main shaft 2 disposed inside the housing 1. One end of the main shaft 2 passes through the housing 1 and extends outside the housing 1. The bottom of the housing 1 is provided with an air inlet 3 and an air intake passage 4 communicating with the air inlet 3. A funnel-shaped enlarged-hole groove 5 is formed on the outer side of the air inlet 3. The inner diameter of the air intake passage 4 gradually increases along the air intake direction. An annular sealing groove 6 is formed on the side wall of the enlarged-hole groove 5. An O-ring rubber sealing ring 7 is embedded in the sealing groove 6. The outer diameter of the rubber sealing ring 7 is greater than the depth of the sealing groove 6.

[0022] The angle between the flared generatrix of the expansion groove 5 and the axis of the air inlet 3 is 15°-30°. This angle range ensures that the expansion groove effectively guides the compressed air while balancing the structural strength and air intake efficiency. The angle between the generatrix of the air intake duct 4 and the axis of the air intake duct 4 is 1°-3°. This angle setting allows the inner diameter of the air intake duct to gradually increase at a reasonable rate, achieving effective airflow diffusion without making the air intake duct structure too complex or affecting the overall strength of the housing due to an excessively large angle. This achieves a good balance between air intake efficiency and structural strength. The inner wall of the air intake duct 4 is polished with a surface roughness Ra≤0.8μm. The smooth inner wall further reduces the frictional resistance between the airflow and the inner wall of the air intake duct, making the airflow smoother.

[0023] The depth of the sealing groove 6 is 75%-85% of the outer diameter of the rubber sealing ring 7, and the width of the sealing groove 6 is 0.2-0.5mm larger than the cross-sectional diameter of the rubber sealing ring 7. This size design allows the rubber sealing ring to obtain a suitable amount of compression in the sealing groove, which ensures that the sealing ring has sufficient elasticity to achieve a good sealing effect, and avoids problems such as sealing failure or sealing ring damage caused by excessive or insufficient compression, thereby further improving the reliability and stability of the sealing structure.

[0024] The inner wall of the air intake duct 4 is provided with a spiral guide groove, and the spiral direction of the spiral guide groove is consistent with the flow direction of compressed air in the air intake duct.

[0025] Working principle: When compressed air enters the air motor, it first enters through the air inlet 3 at the bottom of the housing 1. Since the outer side of the air inlet 3 has a funnel-shaped expansion groove 5, the funnel-shaped structure of the expansion groove 5 can guide the compressed air, just like a "funnel", so that the compressed air can be gathered and enter the air inlet 3 more smoothly, reducing the impact and turbulence of the airflow when entering the air inlet, and making the airflow more stable.

[0026] Next, compressed air enters the intake duct 4, which is connected to the intake port 3. The inner diameter of the intake duct 4 gradually increases along the intake direction, expanding its flow space and allowing the airflow to gradually diffuse. Simultaneously, the spiral guide grooves on the inner wall of the intake duct 4 guide the compressed air to flow in a spiral direction. The resulting spiral airflow makes the compressed air distribution within the intake duct 4 more uniform, reducing the generation of eddies and turbulence, further improving the stability and flow efficiency of the airflow, thus providing a more stable and efficient air source for the air motor.

[0027] In terms of sealing, an O-ring rubber seal 7 is embedded in the annular sealing groove 6 on the side wall of the enlarged groove 5. Since the outer diameter of the rubber seal 7 is larger than the depth of the sealing groove 6, after the relevant components are installed, the rubber seal 7 will be compressed. The resulting elastic deformation can tightly fit the groove wall of the sealing groove 6 and the surface of the component connected to the air inlet 3, forming a reliable sealing barrier. This effectively prevents compressed air from leaking from the connection between the air inlet 3 and other components, ensuring the sealing performance of the air intake system and ensuring that all compressed air can enter the motor through the air intake passage 4, thus guaranteeing the normal operation of the motor. Driven by the compressed air, the main shaft 2 inside the housing 1 begins to rotate under the force of the airflow, thereby realizing the function of the air motor in converting the energy of compressed air into mechanical energy and completing the working process of the air motor.

[0028] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0029] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An enlarged-hole sealing structure for an air motor, comprising a housing (1) and a main shaft (2) disposed inside the housing (1), one end of the main shaft (2) passing through the housing (1) and extending outside the housing (1), characterized in that: The bottom of the housing (1) is provided with an air inlet (3) and an air intake channel (4) connected to the air inlet (3). The outer side of the air inlet (3) is provided with a funnel-shaped expansion groove (5). The inner diameter of the air intake channel (4) gradually increases along the air intake direction. The side wall of the expansion groove (5) is provided with an annular sealing groove (6). An O-ring rubber sealing ring (7) is embedded in the sealing groove (6). The outer diameter of the rubber sealing ring (7) is greater than the depth of the sealing groove (6).

2. The expanded-hole sealing structure for an air motor according to claim 1, characterized in that: The angle between the trumpet-shaped generatrix of the expansion groove (5) and the axis of the air inlet (3) is 15°-30°.

3. The enlarged-hole sealing structure for an air motor according to claim 2, characterized in that: The angle between the generatrix of the air intake (4) and the axis of the air intake (4) is 1°-3°.

4. The enlarged-hole sealing structure for an air motor according to claim 3, characterized in that: The inner wall of the air intake (4) is polished, and the surface roughness Ra≤0.8μm.

5. The enlarged-hole sealing structure for an air motor according to claim 4, characterized in that: The depth of the sealing groove (6) is 75%-85% of the outer diameter of the rubber sealing ring (7), and the width of the sealing groove (6) is 0.2-0.5mm larger than the cross-sectional diameter of the rubber sealing ring (7).

6. The enlarged-hole sealing structure for an air motor according to claim 5, characterized in that: The inner wall of the air intake (4) is provided with a spiral guide groove, and the spiral direction of the spiral guide groove is consistent with the flow direction of compressed air in the air intake (4).

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