Fan-shaped air cylinder

Abstract

The utility model discloses a fan-shaped air cylinder, which relates to the technical field of air cylinders and comprises two fan-shaped air cylinder shells, an integrated blade is arranged between the two fan-shaped air cylinder shells, and rotating shafts are arranged at two ends of the integrated blade. The fan-shaped air cylinder adopts a two-way lip-shaped sealing structure and is provided with a spring steel sheet and a pressing plate, the structure is firm and durable, compressed air enters an air groove to enable the lip-shaped seals to expand towards the periphery to achieve zero leakage, a lubricating oil groove is formed between the lip-shaped seals on the two sides, lubricating oil rotates along with a piston, the lubricating effect is good, friction force is reduced, and the service life is prolonged. The service life of the sealing ring is prolonged, the torque is large, the rotating shaft does not need to use the sealing ring, leakage is avoided, the conical roller bearing is arranged on the fan-shaped air cylinder shell, the conical roller bearing can bear axial force and radial force at the same time, the blade rotating shaft can be effectively positioned, and the service life of the blade rotating shaft is prolonged. And abrasion of the lower edge sealing ring and scratching of the cylinder wall caused by sinking generated by the dead weight of the blades are prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of cylinders, in particular to a fan-shaped cylinder. Background Art

[0002] In safety-critical environments like chemical and oil refining, pneumatic actuators are commonly used to automatically control valves like butterfly and ball valves. Currently, pneumatic actuators primarily consist of a cylindrical cylinder, piston, gear, and rack. During operation, the piston drives the rack, which in turn drives the gear, converting linear motion into rotation.

[0003] In the prior art, such as the patent publication number: CN201220138715.X "A fan-shaped cylinder", which includes a cylinder body, an air port and a piston. The cylinder body is fan-shaped as a whole, and the air port is provided on both sides of the cylinder body. A rotating shaft is provided at the fan-shaped circular part of the cylinder body, and the root of the piston is fixed to the rotating shaft through a shaft sleeve. The shaft sleeve and the rotating shaft are fixedly connected by screws or pins. The utility model has a simple structure, low opening resistance and tight sealing. The rotating shaft is directly driven by the piston, so the failure rate is low and the driving force is large, which reduces the wear of the machine parts and increases the service life of the cylinder.

[0004] The blade rotating shaft of the fan-shaped cylinder currently on the market has no axial and radial positioning, but the fan-shaped cylinder can be installed in any direction during actual use. The lip sealing ring at the lower edge of the blade will be subjected to severe gravity wear due to the dead weight of the blade itself, and may even scratch the shell wall of the fan-shaped cylinder to cause scratches, resulting in air leakage and failure of the fan-shaped cylinder. The current structure of the fan-shaped rotary cylinder is a single-sided O-ring seal, and the rotating shaft is also sealed with an O-ring, but the O-ring is not suitable for dynamic sealing. The rotating cylinder is always rotating. Its sealing principle is that the cylinder shell squeezes the O-ring on the rotating piston to achieve sealing. The friction is large, and the O-ring on the rotating piston is easily worn, causing internal leakage in the cylinder. The O-ring on the rotating shaft is also easily worn, causing external leakage. Both internal leakage and external leakage will affect the cylinder torque and waste air source. In view of the above problems, a fan-shaped cylinder is proposed. Utility Model Content

[0005] The purpose of the present utility model is to provide a fan-shaped cylinder to solve the problem of the prior art proposed in the above-mentioned background technology that the lip-shaped sealing ring at the lower edge of the blade is always subjected to severe gravity wear due to the dead weight of the blade itself during operation, and may even scratch the shell wall of the fan-shaped cylinder to cause scratches, resulting in air leakage and failure of the fan-shaped cylinder.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a fan-shaped cylinder, comprising two fan-shaped cylinder shells, an integral blade is arranged between the two fan-shaped cylinder shells, and rotating shafts are provided at both ends of the integral blades, the rotating shaft passes through the side of the fan-shaped cylinder shell, the outer wall of the rotating shaft is sleeved with bearings, and the bearings are connected to the side walls of the fan-shaped cylinder shell, and the integral blades are arranged on the inner side of the fan-shaped cylinder shell to move back and forth to facilitate the pneumatic effect, and the rotating shaft is connected to the external power source for easy control to achieve the transmission effect, and the bearings provide support between the rotating shaft and the fan-shaped cylinder shell, and the bearings are installed to position the blade rotating shaft and the lip seal to prevent the blade from sinking and causing wear of the sealing ring and the cylinder wall, thereby greatly extending the service life of the fan-shaped cylinder.

[0007] Preferably, an embedding groove is provided on the side of the sector-shaped cylinder housing, and a bearing seat is clamped and connected to the inner side of the embedding groove. The rotating shaft is movable through the inner side of the bearing seat, is pressed to the outside by the bearing seat, and cooperates with the embedding groove to provide installation space, which facilitates the stable installation of the bearing on the sector-shaped cylinder housing to prevent it from falling off.

[0008] Preferably, a bearing adjustment gasket is provided on the side of the bearing seat, and the bearing adjustment gasket is fitly connected to the side of the bearing. The rotating shaft passes through the inner side of the bearing adjustment gasket. The bearing position can be adjusted through the bearing adjustment gasket, and the bearing can be conveniently disassembled through the four top screws on the bearing seat 5.

[0009] Preferably, the outer side of the integrated blade is symmetrically provided with a blade seal ring, and the outer side of the blade seal ring is provided with a seal ring spring steel sheet. The blade seal ring cooperates with the seal ring spring steel sheet to provide a sealing connection. A two-way lip seal structure is adopted. A spring steel sheet is provided inside the lip seal ring to generate a pre-tightening force between the sealing surface and the cylinder wall. A steel pressure plate is provided outside the spring steel sheet to fix the lip seal ring and the spring steel sheet. Compressed air is injected to cause the lip seal to expand outward. The higher the air pressure, the better the seal. There is a lubricating oil groove in the middle of the lip seals on both sides. When the rotary piston reciprocates, the lubricating oil is always in the oil groove, which has a good lubrication effect, low friction, high torque and long service life.

[0010] Preferably, a blade sealing ring pressure plate is provided on the outer side of the sealing ring spring steel sheet, and a mounting block is provided on the side of the blade sealing ring pressure plate. The mounting block cooperates with the blade sealing ring pressure plate to provide installation and achieve tightening, thereby improving the stability of operation.

[0011] Preferably, a plurality of bolt mounting holes are distributed in a fan-shaped circle on the outer side of the sector-shaped cylinder housing, and a fastening bolt is provided on the inner side of the bolt mounting hole. The bolt mounting holes cooperate with the fastening bolt to facilitate the connection and fastening between the two sector-shaped cylinder housings, and at the same time provide a stable installation effect for the integrated blade part.

[0012] Preferably, the outer wall of the fan-shaped cylinder housing is provided with a plurality of reinforcing ribs distributed in a fan shape, an inner notch is provided on the inner side of the fan-shaped cylinder housing, the blade sealing ring pressure plate is provided on the inner side of the inner notch, and the outer wall of the sealing ring spring steel sheet is fitted to the inner wall of the inner notch. The reinforcing ribs are evenly distributed on the outer side of the fan-shaped cylinder housing, which is beneficial for providing heat dissipation effect for the heat generated by the integrated blade when it swings back and forth. The inner notch facilitates the provision of installation space, facilitates the installation of the integrated blade on the inner side, and provides space for operation at the same time.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. In the utility model, the sector-shaped cylinder adopts a two-way lip seal structure, is provided with a spring steel sheet and a pressure plate, and has a firm and durable structure.

[0015] 2. In the utility model, compressed air enters the air groove to make the lip seal expand to the surroundings to achieve zero leakage. There is a lubricating oil groove in the middle of the lip seals on both sides. The lubricating oil rotates with the piston, which has a good lubrication effect, reduces friction, and increases the service life of the sealing ring. The torque is large, and the rotating shaft does not need a sealing ring and there is no leakage.

[0016] 3. In the present invention, a tapered roller bearing is provided on the sector-shaped cylinder housing. The tapered roller bearing can bear axial force and radial force at the same time, and can effectively position the blade rotating shaft to prevent the sinking caused by the blade's own weight from causing wear of the lower edge sealing ring and scratches on the cylinder wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a three-dimensional diagram of a fan-shaped cylinder of the present utility model;

[0018] Figure 2 This is a schematic diagram of the exploded structure of a sector-shaped cylinder of the utility model from another angle;

[0019] Figure 3 This is a schematic diagram of the internal structure of a fan-shaped cylinder of the utility model;

[0020] Figure 4 This is a schematic diagram of the partially exploded structure of a fan-shaped cylinder of the utility model;

[0021] Figure 5 For this utility model Figure 4 A in the figure is an enlarged structural diagram.

[0022] In the picture:

[0023] 1. Sector-shaped cylinder housing; 2. Bolt mounting holes; 3. Fastening bolts; 4. Reinforcement ribs; 5. Bearing seat; 6. Rotating shaft; 7. Embedded groove; 8. Bearing adjustment gasket; 9. Bearing; 11. Integrated blade; 12. Blade seal; 13. Seal spring steel sheet; 14. Blade seal pressure plate; 15. Mounting block; 16. Inner notch. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] Example 1: Reference Figure 1-Figure 5 As shown: A fan-shaped cylinder comprises two fan-shaped cylinder shells 1, an integral blade 11 is arranged between the two fan-shaped cylinder shells 1, and a rotating shaft 6 is provided at both ends of the integral blade 11, the rotating shaft 6 passes through the side of the fan-shaped cylinder shell 1, and the outer wall of the rotating shaft 6 is sleeved with a bearing 9, and the bearing 9 is connected to the side wall of the fan-shaped cylinder shell 1. The integral blade 11 is arranged on the inner side of the fan-shaped cylinder shell 1 to move back and forth to facilitate the realization of pneumatic action, and the rotating shaft 6 is connected to the external power source for easy control to realize the transmission effect, and the bearing 9 provides support between the rotating shaft 6 and the fan-shaped cylinder shell 1. The bearing 9 is installed to position the blade rotating shaft and the lip seal to prevent the blade from sinking and causing wear of the sealing ring and the cylinder wall, thereby greatly extending the service life of the fan-shaped cylinder.

[0026] like Figure 2 As shown, an embedding groove 7 is provided on the side of the sector-shaped cylinder housing 1, and a bearing seat 5 is clamped and connected to the inner side of the embedding groove 7. The rotating shaft 6 is movable through the inner side of the bearing seat 5, is pressed to the outside by the bearing seat 5, and cooperates with the embedding groove 7 to provide installation space, which facilitates the stable installation of the bearing 9 on the sector-shaped cylinder housing 1 to prevent it from falling off.

[0027] like Figure 2 As shown, a bearing adjustment gasket 8 is provided on the side of the bearing seat 5, and the bearing adjustment gasket 8 is fitted and connected to the side of the bearing 9. The rotating shaft 6 passes through the inner side of the bearing adjustment gasket 8. The bearing adjustment gasket 8 can be used to adjust the position of the bearing, and the bearing can be conveniently disassembled through the four top screws on the bearing seat 5.

[0028] like Figure 4As shown, the outer side of the integrated blade 11 is symmetrically provided with a blade seal ring 12, and the outer side of the blade seal ring 12 is provided with a seal ring spring steel sheet 13. The blade seal ring 12 cooperates with the seal ring spring steel sheet 13 to provide a sealing connection. A bidirectional lip seal structure is adopted. A spring steel sheet is provided inside the lip seal ring to generate a pre-tightening force between the sealing surface and the cylinder wall. A steel pressure plate is provided outside the spring steel sheet to fix the lip seal ring and the spring steel sheet. Compressed air is injected to cause the lip seal to expand outward. The higher the air pressure, the better the seal. There is a lubricating oil groove in the middle of the lip seals on both sides. The lubricating oil is always in the oil groove when the rotary piston reciprocates, which has good lubrication effect, low friction, high torque and long service life.

[0029] like Figure 4 As shown, a blade sealing ring pressure plate 14 is provided on the outer side of the sealing ring spring steel sheet 13, and a mounting block 15 is provided on the side of the blade sealing ring pressure plate 14. The mounting block 15 cooperates with the blade sealing ring pressure plate 14 to provide installation and tightening, thereby improving the stability of operation.

[0030] like Figure 1 As shown, a plurality of bolt mounting holes 2 are distributed in a fan-shaped circle on the outer side of the sector-shaped cylinder housing 1, and a fastening bolt 3 is provided on the inner side of the bolt mounting hole 2. The bolt mounting holes 2 cooperate with the fastening bolt 3 to facilitate the connection and fastening between the two sector-shaped cylinder housings 1, and at the same time provide a stable installation effect for the integrated blade 11.

[0031] like Figure 1 and Figure 3 As shown, the outer wall of the sector-shaped cylinder housing 1 is provided with a plurality of reinforcing ribs 4 distributed in a sector shape, an inner notch 16 is provided on the inner side of the sector-shaped cylinder housing 1, a blade sealing ring pressure plate 14 is provided on the inner side of the inner notch 16, and the outer wall of the sealing ring spring steel sheet 13 is fitted to the inner wall of the inner notch 16. The reinforcing ribs 4 are evenly distributed on the outer side of the sector-shaped cylinder housing 1, which is beneficial for providing heat dissipation effect for the heat generated by the integrated blade 11 when it swings back and forth. The inner notch 16 facilitates the provision of installation space, facilitates the installation of the integrated blade 11 on the inner side, and provides space for operation at the same time.

[0032] In the present invention, when the sector-shaped cylinder is in use, when compressed air first enters the inner cavity of the sector-shaped cylinder housing 1 from the first air port, the integrated blade 11 moves to one side, thereby allowing the air in the single-sided chamber to be discharged through the second air port. After the air in the other side chamber is discharged, the air source pressure of the first air port is maintained, and no more compressed air is discharged to ensure the sealing performance of the cylinder. At the same time, the rotating shaft 6 completes counterclockwise rotation. Conversely, when compressed air enters the other side chamber from the second air port, the integrated blade 11 moves toward the first air port, and the air in the single-sided chamber is discharged through the first air port. After the air in the inner cavity of the first air port is discharged, the air source pressure of the second air port is maintained, and no more compressed air is discharged to ensure the sealing performance of the cylinder. In this direction, there should be no compressed air leakage from the blade shaft, and at the same time, the rotating shaft 6 completes clockwise rotation.

[0033] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A sector-shaped cylinder, comprising two sector-shaped cylinder shells (1), characterized in that: An integrated blade (11) is provided between the two sector-shaped cylinder housings (1), and a rotating shaft (6) is provided at both ends of the integrated blade (11). The rotating shaft (6) passes through the side surface of the sector-shaped cylinder housing (1), and a bearing (9) is sleeved on the outer wall of the rotating shaft (6). The bearing (9) is connected to the side wall of the sector-shaped cylinder housing (1).

2. The sector-shaped cylinder according to claim 1, characterized in that: An embedding groove (7) is provided on the side of the sector-shaped cylinder housing (1), a bearing seat (5) is clamped and connected to the inner side of the embedding groove (7), and the rotating shaft (6) movably passes through the inner side of the bearing seat (5).

3. The sector-shaped cylinder according to claim 2, characterized in that: A bearing adjustment gasket (8) is provided on the side of the bearing seat (5), and the bearing adjustment gasket (8) is fitted and connected to the side of the bearing (9), and the rotating shaft (6) passes through the inner side of the bearing adjustment gasket (8).

4. The sector-shaped cylinder according to claim 1, characterized in that: A blade sealing ring (12) is symmetrically arranged on the outer side of the integrated blade (11), and a sealing ring spring steel sheet (13) is arranged on the outer side of the blade sealing ring (12).

5. The sector-shaped cylinder according to claim 4, characterized in that: A blade sealing ring pressing plate (14) is provided on the outer side of the sealing ring spring steel sheet (13), and a mounting block (15) is provided on the side of the blade sealing ring pressing plate (14).

6. The sector-shaped cylinder according to claim 1, characterized in that: A plurality of bolt mounting holes (2) are distributed in a sector shape on the outer side of the sector-shaped cylinder housing (1), and fastening bolts (3) are provided on the inner sides of the bolt mounting holes (2).

7. The sector-shaped cylinder according to claim 5, characterized in that: The outer wall of the sector-shaped cylinder housing (1) is provided with a plurality of reinforcing ribs (4) distributed in a sector shape, an inner notch (16) is provided on the inner side of the sector-shaped cylinder housing (1), the blade sealing ring pressure plate (14) is arranged on the inner side of the inner notch (16), and the outer wall of the sealing ring spring steel sheet (13) is in contact with the inner wall of the inner notch (16).

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