Transmission structure of damper baffle

Abstract

The utility model discloses a transmission structure of a damper baffle, belongs to the technical field of machinery, and aims to overcome the defects that the existing transmission structure of the damper baffle easily causes dead zones and return differences to be increased when the baffle is used. The transmission structure comprises a first connecting rod, a second connecting rod, a first swing arm and a second swing arm, the first connecting rod and the second connecting rod are parallel to each other, the first swing arm is rotationally connected with the first ends of the first connecting rod and the second connecting rod, and the second swing arm is rotationally connected with the second ends of the first connecting rod and the second connecting rod. The middle of the second swing arm is fixedly connected with a driven shaft. Through the double-swing-arm and double-connecting-rod structure, the torque borne by a single connecting rod is reduced, so that the risks of deformation and looseness at the connecting joints of the swing arms and the connecting rods are reduced, the risks of dead zones and return difference increase of the baffles are reduced, the air distribution accuracy of the baffles in the operation of the power plant can be effectively improved, and the operation stability, adaptability and flexibility of the power plant are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of machinery and relates to a transmission structure for adjusting a damper baffle. Background Art

[0002] The existing wind dampers of thermal power plants are driven by a quadrilateral connecting rod structure. The torque of the motor output shaft is transmitted to the damper driven shaft through the quadrilateral connecting rod structure, and then the torque is transmitted to the damper through the damper driven shaft, thereby realizing the function of using the motor to control the opening and closing and angle of the damper. However, the quadrilateral connecting rods of thermal power plants currently mostly adopt a double swing arm plus a single connecting rod structure. Due to the large size of the damper, the torque transmitted by the connecting rod is too large, which is easy to deform and loosen at the connecting rod node, thereby increasing the dead zone and backlash of the damper, and such phenomena will become more serious with the continuous use of the damper. Summary of the invention

[0003] The utility model proposes a transmission structure for adjusting an air door baffle plate in view of the problems existing in the prior art, aiming to overcome the defects of the existing transmission mechanism for the air baffle plate that the baffle plate is prone to dead zone and increased hysteresis during use.

[0004] The utility model is achieved in this way:

[0005] A transmission structure for adjusting a damper baffle, characterized in that it comprises a first connecting rod and a second connecting rod parallel to each other, and a first swing arm and a second swing arm parallel to each other, the first swing arm is rotatably connected to the first ends of the first connecting rod and the second connecting rod, the second swing arm is rotatably connected to the second ends of the first connecting rod and the second connecting rod, the middle part of the first swing arm is connected to a driving shaft, and the middle part of the second swing arm is fixedly connected to a driven shaft.

[0006] Preferably, the first connecting rod and the second connecting rod are both telescopic connecting rods, and the telescopic connecting rods include an outer rod and an inner rod inserted on the outer rod and capable of extending or retracting relative to the outer rod. By adjusting the length of the telescopic connecting rod, the on-site installation error can be adjusted, and the transmission structure can be tightened, thereby reducing the initial dead zone and backlash of the transmission.

[0007] Preferably, the outer rod and the inner rod are threadedly matched, so that the adjustment is convenient and the connection is stable.

[0008] Preferably, inner rods are provided at both ends of the outer rod, and the telescopic connecting rod is rotatably connected to the first swing arm and the second swing arm respectively through the inner rods at both ends. In this way, the telescopic connecting rod can be extended and retracted by only rotating the outer rod.

[0009] Preferably, the first swing arm is connected to the first connecting rod and the second connecting rod by a first ball joint, and the second swing arm is connected to the first connecting rod and the second connecting rod by a second ball joint. Compared with ordinary hinges, ball joints have more freedom of movement, which can reduce the impact of quadrilateral plane deformation on transmission caused by on-site installation deviations. At the same time, when using telescopic connecting rods for tightening operations, ball joints are conducive to reducing the concentration of local transmission torque, avoiding transmission jams, and maintaining a linear relationship between the drive shaft and the driven shaft.

[0010] Preferably, the first ball joint includes a first joint groove on the telescopic link and a first joint ball on the first swing arm, and the second ball joint includes a second joint groove on the telescopic link and a second joint ball on the second swing arm, and the opening directions of the first joint groove and the second joint groove are opposite. The opening of the first joint groove faces the driving shaft, and the opening of the second joint groove faces the driven shaft, so as to avoid interference between the first link and the second link and the driving shaft and the driven shaft.

[0011] Preferably, the first swing arm and the second swing arm have square holes in the middle, and the driving shaft and the driven shaft have square connecting parts respectively inserted in the corresponding square holes, so as to ensure that the first swing arm will not rotate relative to the driving shaft and the second swing arm will not rotate relative to the driven shaft.

[0012] Preferably, a main linkage arm is fixed on the driven shaft, a linkage rod is hinged on the main linkage arm, and a plurality of secondary linkage arms are hinged on the linkage rod. In this way, a single motor can drive a plurality of baffles to swing.

[0013] The utility model provides a transmission structure for adjusting the damper baffle, which reduces the torque applied to a single connecting rod through a double swing arm and a double connecting rod structure, thereby reducing the risk of deformation and loosening at the connection node between the swing arm and the connecting rod, and reducing the risk of increased dead zone and backlash of the baffle, and can effectively improve the accuracy of air distribution of the baffle during operation of the power plant, thereby improving the operating stability, adaptability and flexibility of the power plant. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic diagram of the transmission structure;

[0015] Figure 2 It is a partial schematic diagram of the transmission structure;

[0016] Figure 3 It is a structural schematic diagram of the telescopic connecting rod.

[0017] Explanation of the accompanying drawings: 100, first connecting rod; 110, outer rod; 120, inner rod; 130, first hinge groove; 200, second connecting rod; 300, first swing arm; 310, square hole; 400, second swing arm; 500, driving shaft; 600, driven shaft; 700, main linkage arm; 710, linkage rod; 720, secondary linkage arm; 800, baffle. DETAILED DESCRIPTION

[0018] The following will further describe the specific implementation of the utility model in combination with the accompanying drawings of the embodiments, so that the technical solution of the utility model is easier to understand and grasp. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.

[0019] This embodiment provides a transmission structure for adjusting the air door baffle, such as Figure 1-3 As shown, it includes a first connecting rod 100 and a second connecting rod 200 which are parallel to each other, and a first swing arm 300 and a second swing arm 400 which are parallel to each other. The first swing arm 300 is rotatably connected to the first end of the first connecting rod 100 and the second connecting rod 200, and the second swing arm 400 is rotatably connected to the second end of the first connecting rod 100 and the second connecting rod 200. The middle part of the first swing arm 300 is connected to the driving shaft 500, and the middle part of the second swing arm 400 is fixedly connected to the driven shaft 600. The driving shaft 500 is connected to the motor, and the driven shaft 600 is connected to the baffle 800. The motor drives the driving shaft 500 to rotate, and further drives the first swing arm 300, the first connecting rod 100, the second connecting rod 200 and the second swing arm 400. The second swing arm 400 drives the driven shaft 600 to rotate, and the driven shaft 600 drives the baffle 800 to swing. The driving shaft 500 and the driven shaft 600 are both connected to the corresponding body through bearings. The torque transmitted by the single-sided quadrilateral connecting rod is reduced, and the growth of the dead zone and backlash caused by the continuous use of the connecting rod is also slowed down.

[0020] like Figure 3 As shown, both the first connecting rod 100 and the second connecting rod 200 are telescopic connecting rods, and the telescopic connecting rods include an outer rod 110 and an inner rod 120 inserted on the outer rod 110 and capable of extending or retracting relative to the outer rod 110. By adjusting the length of the telescopic connecting rod, the on-site installation error can be adjusted, and the transmission structure can be tightened, thereby reducing the initial dead zone and backlash of the transmission. In other optional embodiments, the first connecting rod 100 and the second connecting rod 200 can also be an integrated connecting rod.

[0021] Further, the outer rod 110 and the inner rod 120 are threadedly matched. The inner rods 120 are provided at both ends of the outer rod 110, and the telescopic connecting rod is rotatably connected to the first swing arm 300 and the second swing arm 400 respectively through the inner rods 120 at both ends. In this way, the telescopic connecting rod can be extended and retracted by simply rotating the outer rod 110. In other optional embodiments, the inner rod 120 can also be an optical axis without threads, and a threaded hole is provided on the side wall of the outer rod 110, and the tightness of the inner rod 120 is controlled by adjusting the screws inserted in the threaded holes.

[0022] like Figure 1-3 As shown, the first swing arm 300 is connected to the first connecting rod 100 and the second connecting rod 200 by a first ball joint, and the second swing arm 400 is connected to the first connecting rod 100 and the second connecting rod 200 by a second ball joint. Compared with ordinary hinges, ball joints have more freedom of movement, which can reduce the impact of on-site installation deviations and deformation of the quadrilateral plane caused by boiler expansion on transmission. At the same time, when using a telescopic connecting rod for tightening operations, the ball joint is beneficial to reduce the concentration of local transmission torque, avoid transmission jamming, and maintain a linear relationship between the drive shaft 500 and the driven shaft 600. In other optional embodiments, the ball joint can also be replaced by an ordinary hinge in which the shaft and the hole match.

[0023] like Figure 3 As shown, the first ball joint includes a first hinge groove 130 located on the telescopic link and a first hinge ball located on the first swing arm 300, and the second ball joint includes a second hinge groove located on the telescopic link and a second hinge ball located on the second swing arm 400, and the opening directions of the first hinge groove 130 and the second hinge groove are opposite. The opening of the first hinge groove 130 faces the driving shaft 500, and the opening of the second hinge groove faces the driven shaft 600, which can avoid the first connecting rod 100 and the second connecting rod 200 from interfering with the driving shaft 500 and the driven shaft 600. In other optional embodiments, the opening directions of the first hinge groove 130 and the second hinge groove can also be consistent.

[0024] like Figure 2 As shown, the first swing arm 300 and the second swing arm 400 have a square hole 310 in the middle, and the driving shaft 500 and the driven shaft 600 have square connecting parts respectively inserted in the corresponding square holes 310. This ensures that the first swing arm 300 will not rotate relative to the driving shaft 500, and the second swing arm 400 will not rotate relative to the driven shaft 600. In other optional embodiments, the holes in the middle of the first swing arm 300 and the second swing arm 400 can also be non-circular holes such as semicircular holes.

[0025] like Figure 1As shown, a main linkage arm 700 is fixed on the driven shaft 600, a linkage rod 710 is hinged on the main linkage arm 700, and a plurality of secondary linkage arms 720 are hinged on the linkage rod 710, each secondary linkage arm 720 is fixed with a driven shaft 600, and a baffle 800 is provided on each driven shaft 600, so that a single motor can drive a plurality of baffles 800 to swing. The number of the secondary linkage arms 720 and baffles 800 shown in the figure is 5.

Claims

1. A transmission structure for adjusting a damper, characterized in that: The invention comprises a first connecting rod (100) and a second connecting rod (200) which are parallel to each other, and a first swing arm (300) and a second swing arm (400) which are parallel to each other, wherein the first swing arm (300) is rotatably connected to the first ends of the first connecting rod (100) and the second connecting rod (200), and the second swing arm (400) is rotatably connected to the second ends of the first connecting rod (100) and the second connecting rod (200), the middle part of the first swing arm (300) is connected to a driving shaft (500), and the middle part of the second swing arm (400) is fixedly connected to a driven shaft (600).

2. The transmission structure for adjusting the air door baffle according to claim 1, characterized in that: The first connecting rod (100) and the second connecting rod (200) are both telescopic connecting rods, and the telescopic connecting rods include an outer rod (110) and an inner rod (120) inserted on the outer rod (110) and capable of extending or retracting relative to the outer rod (110).

3. The transmission structure for adjusting the air door baffle according to claim 2, characterized in that: The outer rod (110) and the inner rod (120) are threadedly matched.

4. The transmission structure for adjusting the air door baffle according to claim 2, characterized in that: Both ends of the outer rod (110) are provided with inner rods (120), and the telescopic connecting rod is rotatably connected to the first swing arm (300) and the second swing arm (400) respectively through the inner rods (120) at both ends.

5. The transmission structure for adjusting the air door baffle according to claim 1, characterized in that: The first swing arm (300) is connected to the first connecting rod (100) and the second connecting rod (200) by a first ball joint, and the second swing arm (400) is connected to the first connecting rod (100) and the second connecting rod (200) by a second ball joint.

6. The transmission structure for adjusting the air door baffle according to claim 5, characterized in that: The first ball joint comprises a first hinge groove (130) located on the telescopic connecting rod and a first hinge ball located on the first swing arm (300); the second ball joint comprises a second hinge groove located on the telescopic connecting rod and a second hinge ball located on the second swing arm (400); the opening directions of the first hinge groove (130) and the second hinge groove are opposite.

7. A transmission structure for adjusting a damper according to any one of claims 1 to 6, characterized in that: The first swing arm (300) and the second swing arm (400) have a square hole (310) in the middle, and the driving shaft (500) and the driven shaft (600) have square connecting parts respectively inserted into the corresponding square holes (310).

8. A transmission structure for adjusting a damper according to any one of claims 1 to 6, characterized in that: A main linkage arm (700) is fixed on the driven shaft (600), a linkage rod (710) is hinged on the main linkage arm (700), and a plurality of auxiliary linkage arms (720) are hinged on the linkage rod (710).

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