阅读说明：本技术 一种辅助动力装置排气管支撑配套装置 (Auxiliary power device blast pipe supports supporting device ) 是由 牛福春 赵艳秦 刘旭 魏士礼 刘金晶 马爽 于 2019-12-09 设计创作，主要内容包括：本发明涉及一种辅助动力装置排气管支撑配套装置,排气管前部通过密封组件支撑在防火墙上；排气管尾部外圆周面对称、同轴设有左侧接头和右侧接头,左侧接头通过左侧连接结构与左侧支座连接,右侧接头通过右侧连接结构与右侧支座连接,左侧支座和右侧支座固定在承力结构上。该支撑装置不但能够约束排气管的6个自由度,而且可以容纳排气管的热变形,同时易于排气管拆装。(The invention relates to an exhaust pipe supporting matching device of an auxiliary power device, wherein the front part of an exhaust pipe is supported on a firewall through a sealing component; the outer peripheral surface of blast pipe afterbody symmetry, coaxial be equipped with left side joint and right side connect, the left side connects to be connected with the left side support through left side connection structure, and the right side connects to be connected with the right side support through right side connection structure, and left side support and right side support are fixed on bearing structure. The supporting device not only can restrain 6 degrees of freedom of the exhaust pipe, but also can accommodate thermal deformation of the exhaust pipe, and meanwhile, the exhaust pipe is easy to disassemble and assemble.)

1. The utility model provides a supporting device is supported to auxiliary power device blast pipe which characterized in that: the front part of the exhaust pipe (4) is supported on the firewall (3) through a sealing component; the outer circumferential surface of the tail part of the exhaust pipe (4) is symmetrically and coaxially provided with a left side joint (1-1) and a right side joint (1-2), the left side joint (1-1) is connected with a left side support (2-1) through a left side connecting structure, the right side joint (1-2) is connected with a right side support (2-2) through a right side connecting structure, and the left side support (2-1) and the right side support (2-2) are fixed on a force bearing structure (9).

2. The auxiliary power unit exhaust pipe support kit as defined in claim 1, wherein: the left side connection structure is characterized in that a joint bearing (11) is arranged in a connection hole of a left side support (2-1), a lining (12) is arranged in the connection hole of a left side joint (1-1), a left side bolt (13) sequentially penetrates through the lining (12) and the joint bearing (11) and then is fixed through a locking device, a countersunk washer (14) is arranged at the bolt head of the left side bolt (13), one end of the lining (12) is tightly pressed on the surface of the countersunk washer (14), the other end of the lining (12) is tightly pressed on the joint bearing (11), and the length of the lining (12) is greater than that of the connection hole of the left side joint (1-1).

3. The auxiliary power unit exhaust pipe support kit as defined in claim 1, wherein: the right side connecting structure is characterized in that a joint bearing (21) is arranged in a connecting hole of a right side support (2-2), a tooth-shaped structure is arranged on the outer surface of the right side joint (1-2), a tooth-shaped block (22) is arranged between the right side joint (1-2) and the support (2) on the right side, one side of the tooth-shaped block (22) is provided with the tooth-shaped structure and matched with the tooth-shaped structure on the outer surface of the right side joint (1-2), and the other side of the tooth-shaped block is attached to the end face of; a right bolt (23) sequentially penetrates through the right joint (1-2), the tooth-shaped block (22) and the knuckle bearing (21) and then is fixed by a locking device; wherein the diameter of the connecting hole of the right joint (1-2) is larger than that of the right bolt (23); a countersunk washer (24) is arranged at the bolt head of the right bolt (23), and the countersunk washer (24) is supported at the connecting hole of the right joint (1-2).

4. The auxiliary power unit exhaust pipe support kit as defined in claim 1, wherein: the sealing assembly consists of a sealing strip supporting piece (7) and a sealing strip (6), wherein the sealing strip supporting piece (7) is annular, and the shape of the sealing strip (6) is consistent with the shape of the inner surface of the sealing strip supporting piece (7) and is positioned between the sealing strip supporting piece (7) and the exhaust pipe (4).

5. The auxiliary power unit exhaust pipe support kit as defined in claim 4, wherein: the cross section of the sealing strip (6) is B-shaped, one end of the sealing strip is a large-diameter cambered surface and is of a hollow structure; the other end is a small-diameter cambered surface and is of a solid structure.

Technical Field

The invention relates to an auxiliary power device exhaust pipe supporting matching device, and belongs to the field of airplane design.

Background

In order to reduce the dependence on airport equipment, modern large and medium-sized passenger aircraft are all provided with Auxiliary Power Units (APU). On the ground, the air supply device can supply air for an air conditioning system, supply power for an electric power system and supply an air source for a main engine to start; in the air, it is the main equipment that ensures the restart of the main engine after it has stopped. The APU is generally installed in the tail cone of the last section of the fuselage, and high-temperature waste gas generated during operation is exhausted out of the fuselage through a rear exhaust pipe. When the APU is started or closed, the exhaust pipe generates vibration and thermal deformation. The design of blast pipe bearing structure will be able to retrain 6 degrees of freedom of blast pipe, can hold the blast pipe because of the deformation that expend with heat and contract with cold produced, makes things convenient for blast pipe dismouting etc..

Disclosure of Invention

The invention aims to solve the technical problem of providing an exhaust pipe supporting matching device of an auxiliary power device, which not only can restrain 6 degrees of freedom of an exhaust pipe, but also can accommodate thermal deformation of the exhaust pipe, and is easy to disassemble and assemble the exhaust pipe.

In order to solve the above problems, the specific technical scheme of the invention is as follows: the exhaust pipe supporting matching device of the auxiliary power device is characterized in that the front part of an exhaust pipe is supported on a fireproof wall through a sealing assembly; the outer peripheral surface of blast pipe afterbody symmetry, coaxial be equipped with left side joint and right side connect, the left side connects to be connected with the left side support through left side connection structure, and the right side connects to be connected with the right side support through right side connection structure, and left side support and right side support are fixed on bearing structure.

The left side connection structure is characterized in that a joint bearing is arranged in a left side support connection hole, a lining is arranged in a left side joint connection hole, a left side bolt sequentially penetrates through the lining and the joint bearing and then is fixed through a locking device, a countersunk washer is arranged at the bolt head of the left side bolt, one end of the lining is tightly pressed on the surface of the countersunk washer, the other end of the lining is tightly pressed on the joint bearing, and the length of the lining is larger than that of the left side joint connection hole.

The right side connecting structure is characterized in that a joint bearing is arranged in the connecting hole of the right side bearing seat, a tooth-shaped structure is arranged on the outer surface of the right side joint, a tooth-shaped block is arranged between the right side joint and the right side support, the tooth-shaped structure is arranged on one side of the tooth-shaped block and matched with the tooth-shaped structure on the outer surface of the right side joint, and the other side of the tooth-shaped block is attached to the; the right bolt sequentially penetrates through the right joint, the tooth-shaped block and the joint bearing and then is fixed by a locking device; the diameter of the connecting hole of the right joint is larger than that of the right bolt; and a countersunk washer is arranged at the bolt head of the right bolt and supported at the connecting hole of the right joint.

The sealing assembly consists of a sealing strip supporting piece and a sealing strip, wherein the sealing strip supporting piece is annular, and the shape of the sealing strip is consistent with the shape of the inner surface of the sealing strip supporting piece and is positioned between the sealing strip supporting piece and the exhaust pipe.

The cross section of the sealing strip is B-shaped, one end of the sealing strip is a large-diameter cambered surface and is of a hollow structure; the other end is a small-diameter cambered surface and is of a solid structure.

The auxiliary power device exhaust pipe supporting matching device has the following advantages:

1. the exhaust pipe has the advantages that 6 degrees of freedom of the exhaust pipe can be restrained, thermal deformation of the exhaust pipe can be accommodated, the structure is simple and compact, the exhaust pipe is easy to disassemble and assemble, and the process is mature;

2. the application range is wide. The invention is applicable whether the front part of the exhaust pipe is connected with the APU fuel nozzle or not. When the front part of the exhaust pipe is not connected with the APU fuel gas nozzle, the sealing strip plays a role in supporting and sealing; when the front part of the exhaust pipe is connected with the APU fuel nozzle, the sealing strip can mainly play a role in sealing.

Drawings

FIG. 1 is an axial schematic view of the overall solution of the present invention.

FIG. 2 is a schematic front view of the overall arrangement of the present invention.

Fig. 3 is a schematic sectional view a-a of fig. 2.

FIG. 4 is a detailed view of the left side connecting structure design of the present invention.

FIG. 5 is a detailed view of the right side connecting structure design of the present invention.

FIG. 6 is a schematic sectional view of the sealing tape of the present invention.

Detailed Description

As shown in fig. 1 to 3, in an exhaust pipe support kit for an auxiliary power unit, a front portion of an exhaust pipe 4 is supported on a firewall 3 through a sealing member; the outer circumferential surface of the tail part of the exhaust pipe 4 is symmetrically and coaxially provided with a left side joint 1-1 and a right side joint 1-2, the left side joint 1-1 is connected with a left side support 2-1 through a left side connecting structure, the right side joint 1-2 is connected with a right side support 2-2 through a right side connecting structure, and the left side support 2-1 and the right side support 2-2 are fixed on a force bearing structure (9). The left support 2-1, the right support 2-2 and the sealing strip limit the exhaust pipe to move along the Z direction, rotate along the X axis and rotate along the Y axis together.

As shown in fig. 4, the left connecting structure is that a joint bearing 11 is arranged in a connecting hole of a left support 2-1, a bushing 12 is arranged in the connecting hole of the left joint 1-1, a left bolt 13 sequentially penetrates through the bushing 12 and the joint bearing 11 and then is fixed by a locking device, a countersunk washer 14 is arranged at a bolt head of the left bolt 13, one end of the bushing 12 is abutted against the surface of the countersunk washer 14, the other end of the bushing 12 is abutted against the joint bearing 11, the length of the bushing 12 is greater than that of the connecting hole of the left joint 1-1, the bushing 12 can prevent the bolt group from moving after being installed, can accommodate radial thermal deformation of the exhaust pipe, and can prevent the connection between the left joint 1-1 and the support 2-1 from limiting the movement of the exhaust pipe along the Y direction.

As shown in fig. 5, the right side connection structure is that a joint bearing 21 is arranged in a connection hole of the right side branch seat 2-2, a tooth-shaped structure is arranged on the outer surface of the right side joint 1-2, a tooth-shaped block 22 is arranged between the right side joint 1-2 and the right side support 2-2, and a tooth-shaped structure is arranged on one side of the tooth-shaped block 22 and matched with the tooth-shaped structure on the outer surface of the right side joint 1-2; the other side is jointed with the end face of the right knuckle bearing 21; a right bolt 23 sequentially penetrates through the right joint 1-2, the tooth-shaped block 22 and the knuckle bearing 21 and then is fixed by a locking device; the diameter of the connecting hole of the right joint 1-2 is larger than that of the right bolt 23, the right joint 1-2 and the tooth-shaped block 22 are in tooth-to-tooth meshing transmission, when the right joint 1-2 and the left joint 1-1 have a certain amount of non-coaxial, the installation of the right bolt 23 is not influenced, and the connection has integral stability; a countersunk washer 24 is provided at the bolt head of the right bolt 23, and the countersunk washer 24 is supported at the coupling hole of the right joint 1-2.

The left connecting structure and the right connecting structure adopt the design, and the left connecting structure and the right connecting structure limit the movement of the exhaust pipe along the X direction and the rotation of the exhaust pipe along the Z axis together; the right side connection structure restricts movement of the exhaust pipe in the Y direction.

The locking device is composed of a flat washer 31, a slotted nut 32 and a cotter pin 33.

The sealing assembly consists of a sealing strip supporting piece 7 and a sealing strip 6, wherein the sealing strip supporting piece 7 is annular, and the shape of the sealing strip 6 is consistent with the shape of the inner surface of the sealing strip supporting piece 7 and is positioned between the sealing strip supporting piece 7 and the exhaust pipe 4. The sealing strip 6 and the sealing strip support 7 are divided into an upper part and a lower part respectively, the upper sealing strip is fixed on the upper sealing strip support, and the lower sealing strip is fixed on the lower sealing strip support. The assembly formed by the lower sealing strip and the lower sealing strip supporting piece is designed to be integrally detachable, so that the exhaust pipe is convenient to disassemble and assemble. When the exhaust pipe is installed, the exhaust pipe is installed firstly, and then the component is installed; the exhaust pipe is disassembled, the assembly is disassembled firstly, and then the exhaust pipe is disassembled.

As shown in fig. 6, the cross section of the sealing strip 6 is B-shaped, one end of the sealing strip is a large-diameter arc surface and is of a hollow structure, so that the sealing strip has a sealing effect and is easy to compress; the other end is a small-diameter cambered surface and is of a solid structure, so that the supporting effect is achieved, and the compression is not easy to occur.

The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.