Fan-shaped air cylinder

Abstract

The invention discloses a fan-shaped air cylinder, and relates to the technical field of air cylinders, the fan-shaped air cylinder 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 the 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 all around 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 invention relates to the technical field of cylinders, in particular to a fan-shaped cylinder. Background Art

[0002] In the working environment with high safety requirements such as chemical industry and oil refining, pneumatic actuators are generally used for automatic control of butterfly valves, ball valves and other valves. At present, the existing pneumatic actuators are mainly composed of cylindrical cylinders, pistons, gears and racks. When working, the piston drives the rack, and then the rack drives the gear to change the 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, 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, the root of the piston is fixed to the rotating shaft through a shaft sleeve, and the shaft sleeve is fixedly connected to the rotating shaft through screws or pins. The utility model has a simple structure, small opening resistance, and tight sealing. The rotating shaft is directly driven by the piston, so the failure rate is low, the driving force is large, the wear of the machine parts is reduced, and the service life of the cylinder is increased.

[0004] The blade rotating shaft of the fan-shaped cylinder currently on the market has no axial and radial positioning, while 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 an O-ring seal, but the O-ring is not suitable for dynamic sealing. The rotary cylinder is always rotating, and its sealing principle is that the cylinder shell squeezes the O-ring on the rotating piston to achieve sealing, which has large friction. The O-ring on the rotating piston is easily worn, causing internal leakage in the cylinder, and the O-ring on the rotating shaft is also easily worn, causing external leakage. Both internal and external leakage will affect the cylinder torque and waste air source. In view of the above problems, a fan-shaped cylinder is proposed. Summary of the invention

[0005] The object of the present invention is to provide a fan-shaped cylinder to solve the problem that during operation of the prior art proposed in the above-mentioned background technology, 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.

[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, two ends of the integral blade are provided with a rotating shaft, the rotating shaft passes through the side of the fan-shaped cylinder shell, the outer wall of the rotating shaft is sleeved with a bearing, the bearing is connected to the side wall of the fan-shaped cylinder shell, and the integral blade is 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 an external power source to facilitate control to achieve the transmission effect, and the bearing provides support between the rotating shaft and the fan-shaped cylinder shell, and the bearing 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.

[0007] Preferably, an embedding groove is provided on the side of the fan-shaped cylinder housing, and a bearing seat is snap-fitted to the inner side of the embedding groove. The rotating shaft movably passes 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 fan-shaped cylinder housing and prevents 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 removed 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 sealing ring, and the outer side of the blade sealing ring is provided with a sealing ring spring steel sheet. The blade sealing ring cooperates with the sealing ring spring steel sheet to provide a sealing connection. A two-way lip sealing structure is adopted. A spring steel sheet is provided inside the lip sealing 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 sealing ring and the spring steel sheet. Compressed air is filled in to make the lip seal 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 good lubrication effect, small friction, large 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 helping to improve 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 fastening bolts are provided on the inner side of the bolt mounting holes. The bolt mounting holes cooperate with the fastening bolts to facilitate the connection and fastening between the two sector-shaped cylinder housings, while providing 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 opened on the inner side of the fan-shaped cylinder housing, the blade sealing ring pressure plate is arranged on the inner side of the inner notch, and the outer wall of the sealing ring spring steel sheet is attached 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 to provide 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 operation space at the same time.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. In the present invention, the fan-shaped cylinder adopts a bidirectional 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 present invention, compressed air enters the air groove to expand the lip seal 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, increases the service life of the sealing ring, has a large torque, does not require a sealing ring for the rotating shaft, and has 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 A three-dimensional diagram of a fan-shaped cylinder of the present invention;

[0018] Figure 2 This is a schematic diagram of the exploded structure of a fan-shaped cylinder of the present invention from another angle;

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

[0020] Figure 4 It is a schematic diagram of a partially exploded structure of a fan-shaped cylinder of the present invention;

[0021] Figure 5 For the present invention Figure 4 A in the figure is an enlarged structural diagram.

[0022] In the figure:

[0023] 1. Fan-shaped cylinder housing; 2. Bolt mounting hole; 3. Fastening bolt; 4. Reinforcement rib; 5. Bearing seat; 6. Rotating shaft; 7. Embedded groove; 8. Bearing adjustment gasket; 9. Bearing; 11. Integrated blade; 12. Blade sealing ring; 13. Sealing ring spring steel sheet; 14. Blade sealing ring 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 creative work are within the scope of protection of the present invention.

[0025] Example 1: Reference Figure 1-Figure 5 As shown: a fan-shaped cylinder, including two fan-shaped cylinder shells 1, an integrated blade 11 is arranged between the two fan-shaped cylinder shells 1, and rotating shafts 6 are arranged at both ends of the integrated blade 11. The rotating shaft 6 runs through the side of the fan-shaped cylinder shell 1, and the outer wall of the rotating shaft 6 is sleeved with bearings 9, and the bearings 9 are connected to the side walls of the fan-shaped cylinder shell 1. The integrated blades 11 are arranged on the inner side of the fan-shaped cylinder shell 1 to move back and forth to facilitate the pneumatic effect. The rotating shaft 6 is connected to an external power source for easy control to achieve the transmission effect. The bearings 9 provide support between the rotating shaft 6 and the fan-shaped cylinder shell 1. The bearings 9 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.

[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 movably passes through the inner side of the bearing seat 5, is pressed on the outside by the bearing seat 5, and cooperates with the embedding groove 7 to provide an 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 position can be adjusted through the bearing adjustment gasket 8, and the bearing can be conveniently removed 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 filled in to expand the lip seal 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, small friction, large torque and long service life.

[0029] like Figure 4 As shown, a blade sealing ring pressure plate 14 is arranged on the outer side of the sealing ring spring steel sheet 13, and a mounting block 15 is arranged 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 achieve tightening, thereby helping to improve 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 fastening bolts 3 are arranged on the inner side of the bolt mounting holes 2. The bolt mounting holes 2 cooperate with the fastening bolts 3 to facilitate the connection and fastening of 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 in a sector shape, an inner slot 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 slot 16, and the outer wall of the sealing ring spring steel sheet 13 is fitted to the inner wall of the inner slot 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 slot 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 the 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, so that the air in the single-side chamber is discharged through the second air port, and the air in the other side chamber maintains the air source pressure of the first air port after being discharged, and no more compressed air is discharged to ensure the sealing performance of the cylinder, and the rotating shaft 6 completes the counterclockwise rotation movement. On the contrary, when the compressed air enters the other side chamber from the second air port, the integrated blade 11 moves toward the first air port, the air in the single-side chamber is discharged through the first air port, and the air in the inner cavity of the first air port maintains the air source pressure of the second air port after being discharged, and no more compressed air is discharged to ensure the sealing performance of the cylinder, and there should be no compressed air leakage from the blade shaft in this direction, and the rotating shaft 6 completes the clockwise rotation movement.

[0033] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to 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 protection scope 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 arranged between the two sector-shaped cylinder housings (1), and a rotating shaft (6) is arranged 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 fan-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 penetrates the inner side of the bearing seat (5).

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

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

7. The fan-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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