Rapid assembly tool and method for intermediate case sealing device

Abstract

The invention discloses an intermediate case sealing device rapid assembly tool which comprises a pressure rod, and the pressure rod sequentially penetrates through a flaring head and an inner hole of a pressing plate and is in threaded connection with a tensioning rod. The flaring head is of a circular-truncated-cone-shaped structure, and the included angle between the uniform loading face arranged on the side face of the flaring head and the axis is the same as the flaring angle of the outer wall of the outer duct of the intermediate case. According to the disclosed assembling method, the pressing plate, the flaring head and the sealing device are positioned in the radial direction through the pressure rod and kept on the same horizontal plane, the torque rod is rotated to drive the tensioning rod to rotate, force is transmitted to the pressure rod through the tensioning effect of rotating the tensioning rod to pull the pressure rod to move in the axial direction, the flaring head is pushed to be stressed, and then the sealing device is assembled. And meanwhile, the uniform loading surface of the flaring head uniformly transmits the force to the flaring ring of the sealing device, so that the flaring ring is uniformly attached to the flaring of the outer wall of the outer duct of the intermediate case. The problems of unstable assembly quality, low assembly efficiency and personnel waste of the intermediate case sealing device are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of engine component assembly, and particularly relates to a quick assembly tool and an assembly method for an intermediate casing sealing device. Background Art

[0002] The multiple sealing devices of the intermediate casing are installed at the expansion of the outer wall of the intermediate casing outer duct, such as Figure 1 As shown. The assembly quality of the sealing device affects the aerodynamic layout of the outer duct of the intermediate casing. Poor assembly of the sealing device will cause the gas of the outer duct to flow out, seriously affecting the sealing of the intermediate casing. Therefore, the sealing device is required to be completely pressed against the outer wall of the outer duct of the intermediate casing, and the fit degree is not greater than 0.02. In order to meet the assembly relationship of the sealing device, the existing assembly method is that the operator uses a hammer to support the end face of the sealing device, and the operator also knocks the expansion ring symmetrically and evenly. This method is heavily dependent on the operator's cooperation, knocking force and knocking sequence, which can easily cause the sealing device to tilt and bend, and the knocking force is too large to easily cause the expansion ring to bend, seriously affecting the sealing of the sealing device. In addition, two people are required to cooperate in the operation at the same time, and the assembly efficiency is low. It takes 80 minutes to assemble a sealing device, and the assembly efficiency is low.

[0003] The Chinese invention patent with publication number CN110332311B discloses a method for assembling a B-shaped rubber sealing structure. This invention achieves the correct installation of the B-shaped rubber tube by adjusting the assembly sequence of each component, ensuring that the sealing structure meets the requirements. The Chinese invention patent with publication number CN112196671B discloses an adjustable inner and outer casing force transmission mechanism. This invention achieves that the radial load transfer point of the force transmission pin is adjustable along the engine axial direction and fine-tuned circumferentially, and increases the sealing performance of the connection between the force transmission mechanism and the outer casing, while improving the assembly and maintainability of the force transmission mechanism. The above two inventions use structures and methods to adjust the sealing performance of parts during assembly, but the structure is complex, the method is not conventional, and it is not applicable to the sealing device of the present invention and cannot meet the installation requirements. Summary of the Invention

[0004] In order to solve the above problems, the present invention aims to provide a quick assembly tool and assembly method for an intermediate casing sealing device.

[0005] To achieve the above objectives, the present invention adopts the following technical solutions: a quick assembly tool for an intermediate casing sealing device, comprising a pressure rod, which passes through the inner holes of the expansion head and the pressure plate in sequence and is threadedly connected to the tension rod. The other end of the tension rod is connected to the torque rod;

[0006] The expansion mouth is a frustum-shaped structure, and the angle between the load-balancing surface arranged on its side and the axis is the same as the expansion angle of the outer wall of the outer duct of the intermediate casing.

[0007] Preferably, the pressure rod includes a screw rod, a force transmission rod connected to the screw rod and a pressure block arranged inside a nut of the force transmission rod. The pressure block is disc-shaped, and the inner diameters of the screw rod, the force transmission rod and the pressure block increase sequentially.

[0008] Preferably, an inner hole is opened in the middle of the expansion mouth, the side wall is a uniform load surface, the upper and lower end surfaces are respectively a stop surface and a load-bearing surface, and the load-bearing surface is in close contact with the pressure block.

[0009] Preferably, a through hole and a space groove are opened in the middle of the pressure plate, the aperture of the through hole is smaller than that of the space groove, and the two are arranged in a stepped shape. The side end surface of the pressure plate close to the through hole is the pressure surface, and the side end surface close to the space groove is the constraint surface, and the pressure surface is in close contact with the tensioning rod.

[0010] Preferably, a threaded hole is provided in the middle of the tension rod, and a rotating rod hole is provided in the vertical direction at the opposite end of the threaded hole, and the screw rod of the pressure rod is inserted into the threaded hole for threaded connection.

[0011] Preferably, the torque rod is inserted into the rotating rod hole and drives the tension rod to rotate.

[0012] A method for quickly assembling an intermediate casing sealing device comprises the following steps:

[0013] Step 1: Place the expansion head against the expansion ring of the sealing device and press it against the expansion head of the outer wall of the intermediate casing outer duct;

[0014] Step 2: Pass the pressure rod through the expansion head, sealing device, and pressure plate in sequence and connect them with the tension rod through threads. The pressure rod radially positions the sealing device, and the pressure plate axially constrains the sealing device. At the same time, the space groove of the pressure plate can prevent the protrusion of the large end surface of the sealing device from interfering with the pressure plate.

[0015] Step 3: Insert the torque rod into the rotating rod hole of the tension rod, and the tension rod and the torque rod rotate together;

[0016] The pressure plate, expansion head and sealing device are radially positioned by the pressure rod, and the three are kept on the same horizontal plane. The torque rod is rotated to drive the tensioning rod to rotate. The tensioning action of the rotating tensioning rod transmits the force to the pressure rod, pulling the pressure rod axially to push the expansion head to bear the force. At the same time, the load-bearing surface of the expansion head evenly transfers the force to the expansion ring of the sealing device, so that the expansion ring is evenly fitted on the expansion of the outer wall of the outer duct of the intermediate casing.

[0017] Preferably, the load-bearing surface of the expansion head contacts the pressure block of the pressure rod to receive the force of the pressure rod. When the expansion head presses the sealing device, the stop surface of the expansion head contacts the small end face of the sealing device to prevent the expansion ring of the sealing device from being overloaded and crushing the expansion ring. At the same time, the stop surface can check whether the expansion ring and the expansion of the intermediate casing are fully fitted.

[0018] Preferably, the force transmission rod of the pressure rod passes through the inner hole of the expansion head, the inner hole of the sealing device and the pressure plate, and the pressure rod is used to transmit the external load and transmit the force to the expansion head at the same time.

[0019] Preferably, the restraining surface of the pressure plate contacts the large end surface of the sealing device to axially position the sealing device, the through hole of the pressure plate cooperates with the force transmission rod of the pressure rod, and the pressure surface of the pressure plate contacts the tensioning rod, thereby receiving the pressure of the tensioning rod.

[0020] Compared with existing technologies, the present invention has the following advantages: The rapid assembly tool and method for the intermediate casing sealing device according to the present invention require only one operator. By radially positioning the pressure rod and axially constraining the sealing device with the pressure plate, the operator simply rotates the rotating rod, which allows the expansion head to evenly transfer force to the sealing device expansion ring, ensuring that the expansion ring fits evenly against the intermediate casing expansion surface. This ensures sealing, stable assembly quality, and a satisfactory fit, increasing assembly efficiency by 75%. The tool is easy to operate, and the stop surface of the expansion head can also be used to detect the acceptable dimensions of the intermediate casing expansion and the expansion ring of the sealing device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the specific embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 This is a schematic diagram of the assembly relationship of the sealing device of the present invention;

[0023] Figure 2 It is a schematic diagram of the assembly diagram of the sealing device tooling of the present invention;

[0024] Figure 3 It is a schematic diagram of the expansion mouth of the present invention;

[0025] Figure 4 is a schematic diagram of a pressure rod of the present invention;

[0026] Figure 5 It is a schematic diagram of a pressing plate of the present invention;

[0027] Figure 6 It is the rotating rod intention of the present invention;

[0028] In the figure, 1-pressure plate; 2-pressure rod; 3-expansion head; 4-tension rod; 5-torque rod; 6-load-distributing surface; 7-stop surface; 8-load-bearing surface; 9-screw; 10-force transmission rod; 11-pressure block; 12-through hole; 13-space groove; 14-constraint surface; 15-pressure surface; 16-threaded hole; 17-rotation rod hole. DETAILED DESCRIPTION

[0029] The present invention is further described below with reference to the accompanying drawings and specific embodiments. However, it should not be understood that the scope of the subject matter described in the present invention is limited to the following embodiments. Without departing from the above technical ideas of the present invention, various modifications, substitutions and changes made according to common technical knowledge and customary means in the field are included in the scope of the present invention.

[0030] The present invention provides a quick assembly tool and assembly method for an intermediate casing sealing device, referring to Figure 2 The tooling mainly includes a pressure plate 1, a pressure rod 2, an expansion head 3, a tension rod 4, and a torque rod 5. The pressure rod 2 passes through the expansion head 3 and the inner hole of the pressure plate 1 in sequence and is threadedly connected to the tension rod 4. The other end of the tension rod 4 is connected to the torque rod 5.

[0031] Reference Figure 3 The expansion head 3 is a truncated cone-shaped structure. The angle between the load-balancing surface (6) provided on the side and the axis is the same as the expansion angle of the outer wall of the intermediate casing outer duct. The expansion head 3 is provided with an inner hole in the middle, and the side wall is the load-balancing surface 6. The upper and lower end surfaces are respectively the stop surface 7 and the load-bearing surface 8. The load-bearing surface 8 is in contact with the pressure block 11.

[0032] Reference Figure 4 The pressure rod 2 includes a screw rod 9, a force transmission rod 10 connected to the screw rod 9 and a pressure block 11 arranged on the inner side of the nut of the force transmission rod 10. The pressure block 11 is disc-shaped, and the inner diameters of the screw rod 9, the force transmission rod 10 and the pressure block 11 increase successively.

[0033] Reference Figure 5 A through hole 12 and a space groove 13 are provided in the middle of the pressure plate 1. The aperture of the through hole is smaller than that of the space groove 13, and the two are arranged in a stepped manner. The side end surface of the pressure plate close to the through hole 12 is the pressure surface 15, and the side end surface close to the space groove 13 is the constraint surface 14. The pressure surface 15 is in close contact with the tension rod 4.

[0034] Reference Figure 6 A threaded hole 16 is provided in the middle of the tension rod 4, and a rotating rod hole 17 is provided in the vertical direction at the opposite end of the threaded hole 16. The screw rod 9 of the pressure rod 2 is inserted into the threaded hole 16 for threaded connection.

[0035] A method for quickly assembling an intermediate casing sealing device comprises the following steps:

[0036] Step 1: Place the expansion head 3 close to the expansion ring of the sealing device and press it tightly against the expansion of the outer wall of the intermediate casing outer duct;

[0037] Step 2: Pass the pressure rod 2 through the expansion head 3, the sealing device, and the pressure plate 1 in sequence and thread it into the tension rod 4. The pressure rod 2 radially positions the sealing device, and the pressure plate 1 axially constrains the sealing device. At the same time, the spatial groove 13 of the pressure plate 1 can prevent the protrusions on the large end surface of the sealing device from interfering with the pressure plate 1.

[0038] Step 3: Insert the torque rod 5 into the rotating rod hole 17 of the tension rod 4, and the tension rod 4 and the torque rod 5 rotate together.

[0039] The expansion head 3 is a truncated cone-shaped structure, used to press the expansion ring of the sealing device into a tight fit with the expansion of the outer wall of the intermediate casing outer duct. The angle between the load-balancing surface 6 of the expansion head 3 and the axis is the same as the angle of the expansion of the outer wall of the intermediate casing outer duct. When the expansion head 3 is subjected to force, the load-balancing surface 6 is used to evenly transfer the force to the expansion ring of the sealing device, so that the expansion ring is evenly fitted on the expansion of the intermediate casing. The load-bearing surface 8 of the expansion head 3 contacts the pressure block 11 of the pressure rod 2 and is used to receive the force of the pressure rod 2. The small end surface of the expansion head 3 is a stop surface 7. When the expansion head 3 presses the sealing device, the stop surface 7 contacts the small end surface of the sealing device to prevent the expansion ring of the sealing device from being overloaded and crushing the expansion ring. At the same time, the stop surface 7 can check whether the expansion ring and the intermediate casing expansion are fully fitted, thereby detecting problems with the diameter of the intermediate casing expansion or the diameter of the sealing device.

[0040] The pressure rod 2 comprises a screw 9, a force transmission rod 10, and a pressure block 11, which transmit external loads and transfer force to the expansion head 3. The pressure block 11 receives the force from the pressure rod 2, thereby compressing the expansion head 3. The force transmission rod 10 passes through the inner bore of the expansion head 3, the inner bore of the sealing device, and the pressure plate 1, radially constraining all three, keeping them aligned. The screw 9 mates with the threaded hole of the tension rod 4, and the tensioning action of the tension rod 4 is rotated to transmit force to the pressure rod.

[0041] The restraining surface 14 of the pressure plate 1 contacts the large end face of the sealing device, providing axial positioning for the sealing device. The through hole 12 of the pressure plate 1 mates with the force transmission rod of the pressure rod 2. The spatial groove 13 prevents protrusions from the large end face of the sealing device from interfering with the pressure plate 1. The pressure surface 15 of the pressure plate 1 contacts the tension rod 4, thereby receiving the pressure applied by the tension rod 4.

[0042] One end of the tension rod 4 has a radial through hole 17 that cooperates with the torque rod 5 , and the tension rod 4 and the torque rod 5 rotate together.

[0043] In summary, the rapid assembly tool and method for an intermediate casing sealing device of the present invention radially positions the pressure plate 1, expansion head 3, and sealing device via the pressure rod 2, maintaining the three components on the same horizontal plane. The operator rotates the torque rod 5, driving the tension rod 4 to rotate, pulling the pressure rod 2 axially, pushing the expansion head 3 to squeeze the expansion ring of the sealing device into contact with the expanded outer wall of the intermediate casing outer duct.

[0044] The present invention provides a rapid assembly tool and method for an intermediate casing sealing device. This tool requires only one operator and allows the sealing device's flared ring to be quickly and completely fitted to the flared portion of the intermediate casing's outer duct without damaging it. The assembly process takes less than 20 minutes, achieving a perfect fit that meets assembly requirements.

[0045] The above describes in detail the rapid assembly tool and method for the intermediate casing sealing device provided by the present invention. Specific examples are used herein to illustrate the structure and operating principles of the present invention. The description of the above embodiments is intended only to facilitate understanding of the method and core concept of the present invention. It should be noted that those skilled in the art may make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications fall within the scope of protection of the claims.

Claims

1. A quick assembly tool for an intermediate casing sealing device, characterized in that: It comprises a pressure rod (2), which passes through the inner hole of the expansion head (3) and the pressure plate (1) in sequence and is threadedly connected to the tension rod (4), and the other end of the tension rod (4) is connected to the torque rod (5); The expansion mouth (3) is a truncated cone-shaped structure, and the angle between the load-balancing surface (6) arranged on the side and the axis is the same as the expansion angle of the outer wall of the outer duct of the intermediate casing.

2. The quick assembly tool for the intermediate casing sealing device according to claim 1 is characterized in that: The pressure rod (2) comprises a screw rod (9), a force transmission rod (10) connected to the screw rod (9), and a pressure block (11) arranged inside a nut of the force transmission rod (10); the pressure block (11) is disc-shaped, and the inner diameters of the screw rod (9), the force transmission rod (10) and the pressure block (11) increase in sequence.

3. The quick assembly tool for the intermediate casing sealing device according to claim 1 is characterized in that: The middle of the expansion head (3) is provided with an inner hole, the side wall is a load-bearing surface (6), and the upper and lower end surfaces are respectively a stop surface (7) and a load-bearing surface (8), and the load-bearing surface (8) is in close contact with the pressure block (11).

4. The quick assembly tool for the intermediate casing sealing device according to claim 1 is characterized in that: A through hole (12) and a space groove (13) are provided in the middle of the pressure plate (1); the diameter of the through hole is smaller than that of the space groove (13), and the two are arranged in a stepped manner; the side end surface of the pressure plate close to the through hole (12) is a pressure surface (15), and the side end surface close to the space groove (13) is a constraint surface (14); the pressure surface (15) is in close contact with the tension rod (4).

5. The quick assembly tool for the intermediate casing sealing device according to claim 1 is characterized in that: A threaded hole (16) is provided in the middle of the tension rod (4), and a rotating rod hole (17) is provided in the vertical direction at the opposite end of the threaded hole (16). The screw rod (9) of the pressure rod (2) is inserted into the threaded hole (16) for threaded connection.

6. The quick assembly tool for the intermediate casing sealing device according to claim 1 is characterized in that: The torque rod (5) is inserted into the rotating rod hole (17) and drives the tension rod (4) to rotate.

7. A method for assembling a sealing device using the intermediate casing sealing device quick assembly tool as claimed in any one of claims 1 to 6, characterized in that: The following steps are included: Step 1: The expansion head (3) is pressed against the expansion ring of the sealing device and pressed against the expansion of the outer wall of the outer duct of the intermediate casing; Step 2: The pressure rod (2) is passed through the expansion head (3), the sealing device, the pressure plate (1) in sequence and is threadedly connected to the tension rod (4). The pressure rod (2) radially positions the sealing device, and the pressure plate (1) axially constrains the sealing device. At the same time, the space groove (13) of the pressure plate (1) can prevent the protrusions on the large end surface of the sealing device from interfering with the pressure plate (1); Step 3: Insert the torque rod (5) into the rotating rod hole (17) of the tension rod (4), and the tension rod (4) and the torque rod (5) rotate together; The pressure plate (1), the expansion head (3) and the sealing device are radially positioned by the pressure rod (2) to keep the three on the same horizontal plane, and the torque rod (5) is rotated to drive the tension rod (4) to rotate. The tensioning action of the rotating tension rod (4) transmits force to the pressure rod (2) to pull the pressure rod (2) axially to push the expansion head (3) to be stressed. At the same time, the load-bearing surface (6) of the expansion head (3) evenly transmits force to the expansion ring of the sealing device, so that the expansion ring is evenly fitted on the expansion of the outer wall of the outer duct of the intermediate casing.

8. The method for assembling the intermediate casing sealing device according to claim 7, characterized in that: The load-bearing surface (8) of the expansion head (3) contacts the pressure block (11) of the pressure rod (2) to receive the force of the pressure rod (2). When the expansion head (3) presses the sealing device, the stop surface (7) of the expansion head (3) contacts the small end surface of the sealing device to prevent the expansion ring of the sealing device from being overloaded and crushing the expansion ring. At the same time, the stop surface (7) can check whether the expansion ring and the expansion of the intermediate casing are completely fitted.

9. The method for assembling the intermediate casing sealing device according to claim 7, characterized in that: The force transmission rod (10) of the pressure rod (2) passes through the inner hole of the expansion head (3), the inner hole of the sealing device and the pressure plate (1). The pressure rod (2) is used to transmit external load and transmit force to the expansion head (3) at the same time.

10. The method for assembling the intermediate casing sealing device according to claim 7, characterized in that: The restraining surface (14) of the pressure plate (1) contacts the large end surface of the sealing device to axially position the sealing device. The through hole (12) of the pressure plate (1) cooperates with the force transmission rod (10) of the pressure rod (2). The pressure surface (15) of the pressure plate (1) contacts the tension rod (4) to receive the pressure effect of the tension rod (4).

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