Primary stator assembly pin dismounting and mounting tool for auxiliary power device

Abstract

The utility model discloses a tool for dismounting and mounting a pin of a primary stator assembly of an auxiliary power device, which relates to the technical field of auxiliary power devices and comprises a bottom bearing assembly, a top pressing plate and a distance adjusting mechanism for adjusting the distance between the bottom bearing assembly and the top pressing plate. A mounting gap used for mounting a first-stage stator assembly is formed between the bottom bearing assembly and the top pressing plate, and a positioning assembly used for positioning the first-stage stator assembly is arranged on the bottom bearing assembly. According to the utility model, the labor time for production and maintenance of the civil aviation auxiliary power device is effectively reduced, the working efficiency of maintenance operators is improved, the maintenance damage rate is reduced, the maintenance quality risk is reduced, and the safety production operability is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of auxiliary power devices, and more specifically to the technical field of tooling for removing and installing pins of a first-stage stator assembly of an auxiliary power device. Background Art

[0002] Auxiliary Power Unit (APU) is a small centrifugal turbine engine installed at the tail of the aircraft. Figure 1 ), when the main engine is stopped, on the one hand, it ensures the normal operation of the onboard equipment by providing power to the aircraft, and on the other hand, it ensures the normal start of the main engine and emergency start in the air by providing compressed air source, playing an important role in the daily power supply of the aircraft and the handling of extreme situations.

[0003] The first-stage stator assembly is an important part of the APU body and plays a role in changing the direction of airflow. The first-stage stator assembly consists of the first-stage turbine guide block, containment ring and other components, and is fixed with pins. During the disassembly / assembly process, a drilling machine is required to drill holes in the first-stage stator assembly to fix the pins. For this purpose, a fixture is designed to fix the first-stage stator assembly during the drilling process using a drilling machine. Utility Model Content

[0004] The purpose of the utility model is to solve the above technical problems and provide a tool for removing and installing the pins of a first-stage stator assembly of an auxiliary power device.

[0005] In order to achieve the above-mentioned purpose, the utility model specifically adopts the following technical solutions:

[0006] The utility model provides a tool for removing and installing the pins of a first-stage stator assembly of an auxiliary power device, comprising a bottom bearing assembly, a top clamping plate, and a distance adjustment mechanism for adjusting the distance between the bottom bearing assembly and the top clamping plate, wherein an installation gap for installing the first-stage stator assembly is formed between the bottom bearing assembly and the top clamping plate, and a positioning assembly for positioning the first-stage stator assembly is arranged on the bottom bearing assembly.

[0007] Specifically, the first-stage stator assembly pin removal and installation tool can effectively reduce the man-hours used in the production and maintenance of civil aviation auxiliary power units, improve the work efficiency of maintenance operators, reduce the maintenance damage rate, reduce the maintenance quality risk, and increase safe production operability. The tool is simple and reasonable, easy to operate, and effectively improves production efficiency as well as applicability and compliance during work.

[0008] In one embodiment, the bottom bearing assembly is a disc-shaped lower pressure plate, the upper surface of the lower pressure plate is provided with a circular positioning groove that is recessed downward and matched with the size of the first-stage stator assembly, the lower surface of the lower pressure plate is provided with a mounting portion that cooperates with the three-jaw chuck of a drilling machine, and the positioning assembly is located in the circular positioning groove.

[0009] In one embodiment, the positioning assembly includes at least two positioning holes located in the circular positioning groove, and all of the positioning holes are located on the same circumference concentric with the circular positioning groove.

[0010] In one embodiment, the positioning holes are arc-shaped positioning holes, and there are two of them, and the two arc-shaped positioning holes are located on the same circumference that is concentric with the circular positioning groove.

[0011] Specifically, a specific structure of a positioning assembly is disclosed, wherein the number of arc-shaped positioning holes is preferably two, and the two arc-shaped positioning holes enable the first-stage stator assembly to be stably installed in the circular positioning groove, thereby avoiding shaking during installation or disassembly and increasing stability.

[0012] In one embodiment, the center of the lower pressing plate coincides with the center of the circular positioning groove.

[0013] In one embodiment, the top clamping plate is a disc-shaped upper pressing plate, the upper pressing plate and the lower pressing plate are parallel to each other, and the projection of the center of the upper pressing plate along a direction perpendicular to the lower pressing plate coincides with the center of the lower pressing plate.

[0014] In one embodiment, the area of ​​the upper pressing plate is smaller than the area of ​​the lower pressing plate.

[0015] In one embodiment, the distance adjustment mechanism includes a connecting rod and a locking mechanism, the upper pressure plate and / or the lower pressure plate are slidably arranged on the connecting rod, the first-stage stator assembly is sleeved on the connecting rod between the upper pressure plate and the lower pressure plate, and the locking mechanism presses the first-stage stator assembly between the upper pressure plate and the lower pressure plate.

[0016] Specifically, the upper pressing plate and / or the lower pressing plate are slidably mounted on the connecting rod, and the structure includes three forms. The first form: the upper pressing plate and the lower pressing plate are both slidably mounted on the connecting rod, and the positions of the upper pressing plate and the lower pressing plate on the connecting rod can be moved; the second form: the upper pressing plate is fixedly mounted on the connecting rod, and the lower pressing plate is slidably mounted on the connecting rod. In this way, only the position of the lower pressing plate on the connecting rod can be moved; the third form: the upper pressing plate is slidably mounted on the connecting rod, and the lower pressing plate is fixedly mounted on the connecting rod. In this way, only the position of the upper pressing plate on the connecting rod can be moved. All three forms can achieve the distance adjustment between the upper pressing plate and the lower pressing plate.

[0017] In one embodiment, the connecting rod is a threaded rod, one end of which is fixedly connected to the center position of the upper surface of the lower pressure plate, a threaded hole is provided at the center of the upper pressure plate, the other end of the threaded rod passes through the threaded hole, and the locking mechanism is a fixing nut sleeved on the threaded rod.

[0018] Specifically, the scheme is a specific structure of the third form.

[0019] In one embodiment, one end of the threaded rod is connected to the center position of the upper surface of the lower pressing plate by welding.

[0020] Specifically, during the assembly process, the threaded rod is connected to the center of the circular groove of the lower pressure plate by welding, the first-stage stator assembly is placed in the circular groove of the lower pressure plate, the upper pressure plate is installed on the threaded rod, and the distance between the upper pressure plate and the lower pressure plate is adjusted. After the upper pressure plate contacts the first-stage stator assembly, the upper pressure plate is locked by fixing the nut. The overall tooling installation is completed, and the mounting part of the lower pressure plate is installed on the three-jaw chuck of the drilling machine to remove and install the pins of the first-stage stator assembly.

[0021] The beneficial effects of the utility model are as follows:

[0022] 1. The utility model is reasonably designed. The first-stage stator assembly pin removal and installation tool can effectively reduce the man-hours used in the production and maintenance of civil aviation auxiliary power units, improve the work efficiency of maintenance operators, reduce the maintenance damage rate, reduce the maintenance quality risk, and increase safe production operability. The tool is simple and reasonable, easy to operate, and effectively improves production efficiency and applicability and compliance during work.

[0023] 2. A specific structure of a positioning assembly is disclosed. The number of arc-shaped positioning holes is preferably two. The two arc-shaped positioning holes enable the first-stage stator assembly to be stably installed in the circular positioning groove, avoiding shaking during installation or disassembly and increasing stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the utility model;

[0025] Figure 2 yes Figure 1 A directional view of

[0026] Figure 3 yes Figure 1 Schematic diagram of the first stage stator assembly installed;

[0027] Figure 4 yes Figure 1 Axonometric drawing from another angle;

[0028] Figure numerals: 1- bottom load-bearing assembly, 2- connecting rod, 3- top clamping plate, 4- locking mechanism. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. 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.

[0031] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0032] In the description of the embodiments of the present invention, it should be noted that the terms "inside", "outside", "upper", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0033] Example 1

[0034] like Figures 1 to 4 As shown, this embodiment provides a tool for removing and installing the pins of the first-stage stator assembly of an auxiliary power unit, including a bottom bearing assembly 1, a top clamping plate 3, and a distance adjustment mechanism for adjusting the distance between the bottom bearing assembly 1 and the top clamping plate 3. An installation gap for installing the first-stage stator assembly is formed between the bottom bearing assembly 1 and the top clamping plate 3. A positioning assembly for positioning the first-stage stator assembly is provided on the bottom bearing assembly 1.

[0035] Specifically, the first-stage stator assembly pin removal and installation tool can effectively reduce the man-hours used in the production and maintenance of civil aviation auxiliary power units, improve the work efficiency of maintenance operators, reduce the maintenance damage rate, reduce the maintenance quality risk, and increase safe production operability. The tool is simple and reasonable, easy to operate, and effectively improves production efficiency as well as applicability and compliance during work.

[0036] Example 2

[0037] like Figures 1 to 4 As shown, this embodiment provides a tool for removing and installing the pins of the first-stage stator assembly of an auxiliary power unit, including a bottom bearing assembly 1, a top clamping plate 3, and a distance adjustment mechanism for adjusting the distance between the bottom bearing assembly 1 and the top clamping plate 3. An installation gap for installing the first-stage stator assembly is formed between the bottom bearing assembly 1 and the top clamping plate 3. A positioning assembly for positioning the first-stage stator assembly is provided on the bottom bearing assembly 1.

[0038] The bottom bearing assembly 1 is a disc-shaped lower pressure plate, the upper surface of which is provided with a circular positioning groove which is concave downward and matched with the size of the first-stage stator assembly, and the lower surface of the lower pressure plate is provided with a mounting portion which cooperates with the three-jaw chuck of the drilling machine, and the positioning assembly is located in the circular positioning groove.

[0039] The positioning assembly comprises at least two positioning holes located in the circular positioning groove, and all the positioning holes are located on the same circumference concentric with the circular positioning groove.

[0040] Example 3

[0041] like Figures 1 to 4 As shown, this embodiment provides a tool for removing and installing the pins of the first-stage stator assembly of an auxiliary power unit, including a bottom bearing assembly 1, a top clamping plate 3, and a distance adjustment mechanism for adjusting the distance between the bottom bearing assembly 1 and the top clamping plate 3. An installation gap for installing the first-stage stator assembly is formed between the bottom bearing assembly 1 and the top clamping plate 3. A positioning assembly for positioning the first-stage stator assembly is provided on the bottom bearing assembly 1.

[0042] The bottom bearing assembly 1 is a disc-shaped lower pressure plate, the upper surface of which is provided with a circular positioning groove which is concave downward and matched with the size of the first-stage stator assembly, and the lower surface of the lower pressure plate is provided with a mounting portion which cooperates with the three-jaw chuck of the drilling machine, and the positioning assembly is located in the circular positioning groove.

[0043] The positioning holes are arc-shaped positioning holes, and there are two of them, and both of the two arc-shaped positioning holes are located on the same circumference that is concentric with the circular positioning groove.

[0044] Specifically, a specific structure of a positioning assembly is disclosed, wherein the number of arc-shaped positioning holes is preferably two, and the two arc-shaped positioning holes enable the first-stage stator assembly to be stably installed in the circular positioning groove, thereby avoiding shaking during installation or disassembly and increasing stability.

[0045] The center of the lower pressing plate coincides with the center of the circular positioning groove.

[0046] The top pressing plate 3 is a disc-shaped upper pressing plate. The upper pressing plate and the lower pressing plate are parallel to each other, and the projection of the center of the upper pressing plate along a direction perpendicular to the lower pressing plate coincides with the center of the lower pressing plate.

[0047] The area of ​​the upper pressing plate is smaller than the area of ​​the lower pressing plate.

[0048] Example 4

[0049] This embodiment is further optimized on the basis of Embodiment 2 or Embodiment 3, specifically:

[0050] The distance adjustment mechanism includes a connecting rod 2 and a locking mechanism 4. The upper pressure plate and / or the lower pressure plate are slidably arranged on the connecting rod 2. The first-stage stator assembly is sleeved on the connecting rod 2 between the upper pressure plate and the lower pressure plate. The locking mechanism 4 presses the first-stage stator assembly between the upper pressure plate and the lower pressure plate.

[0051] Specifically, the upper pressing plate and / or the lower pressing plate are slidably mounted on the connecting rod 2. The structure includes three forms. The first form: the upper pressing plate and the lower pressing plate are both slidably mounted on the connecting rod 2, and the positions of the upper pressing plate and the lower pressing plate on the connecting rod 2 can be moved; the second form: the upper pressing plate is fixedly mounted on the connecting rod 2, and the lower pressing plate is slidably mounted on the connecting rod 2. In this way, only the position of the lower pressing plate on the connecting rod 2 can be moved; the third form: the upper pressing plate is slidably mounted on the connecting rod 2, and the lower pressing plate is fixedly mounted on the connecting rod 2. In this way, only the position of the upper pressing plate on the connecting rod 2 can be moved. All three forms can achieve the distance adjustment between the upper pressing plate and the lower pressing plate.

[0052] Example 5

[0053] This embodiment is further optimized on the basis of embodiment 4, specifically:

[0054] The connecting rod 2 is a threaded rod, one end of which is fixedly connected to the center position of the upper surface of the lower pressure plate. A threaded hole is provided at the center of the upper pressure plate, and the other end of the threaded rod passes through the threaded hole. The locking mechanism 4 is a fixing nut sleeved on the threaded rod.

[0055] Specifically, the scheme is a specific structure of the third form.

[0056] One end of the threaded rod is connected to the center position of the upper surface of the lower pressing plate by welding.

[0057] Specifically, during the assembly process, the threaded rod is connected to the center of the circular groove of the lower pressure plate by welding, the first-stage stator assembly is placed in the circular groove of the lower pressure plate, the upper pressure plate is installed on the threaded rod, and the distance between the upper pressure plate and the lower pressure plate is adjusted. After the upper pressure plate contacts the first-stage stator assembly, the upper pressure plate is locked by fixing the nut. The overall tooling installation is completed, and the mounting part of the lower pressure plate is installed on the three-jaw chuck of the drilling machine to remove and install the pins of the first-stage stator assembly.

Claims

1. A tool for removing and installing pins of a first-stage stator assembly of an auxiliary power unit, characterized in that: The invention comprises a bottom bearing assembly (1), a top pressing plate (3), and a distance adjustment mechanism for adjusting the distance between the bottom bearing assembly (1) and the top pressing plate (3); an installation gap for installing a first-stage stator assembly is formed between the bottom bearing assembly (1) and the top pressing plate (3); and a positioning assembly for positioning the first-stage stator assembly is arranged on the bottom bearing assembly (1).

2. The tool for removing and installing the pins of the first-stage stator assembly of the auxiliary power unit according to claim 1, characterized in that: The bottom bearing assembly (1) is a disc-shaped lower pressure plate, the upper surface of which is provided with a circular positioning groove which is concave downward and matches the size of the first-stage stator assembly, the lower surface of which is provided with a mounting portion which cooperates with the three-jaw chuck of a drilling machine, and the positioning assembly is located in the circular positioning groove.

3. The tool for removing and installing the pin of the first-stage stator assembly of the auxiliary power unit according to claim 2, characterized in that: The positioning assembly includes at least two positioning holes located in the circular positioning groove, and all the positioning holes are located on the same circumference concentric with the circular positioning groove.

4. The tool for removing and installing the pin of the first-stage stator assembly of the auxiliary power unit according to claim 3, characterized in that: The positioning holes are arc-shaped positioning holes, and there are two of them, and the two arc-shaped positioning holes are located on the same circumference that is concentric with the circular positioning groove.

5. The tool for removing and installing the pins of the first-stage stator assembly of an auxiliary power unit according to claim 3, characterized in that: The center of the lower pressing plate coincides with the center of the circular positioning groove.

6. The tool for removing and installing the pins of the first-stage stator assembly of an auxiliary power unit according to claim 2, characterized in that: The top pressing plate (3) is a disc-shaped upper pressing plate, the upper pressing plate and the lower pressing plate are parallel to each other, and the projection of the center of the upper pressing plate along a direction perpendicular to the lower pressing plate coincides with the center of the lower pressing plate.

7. The tool for removing and installing the pins of the first-stage stator assembly of an auxiliary power unit according to claim 6, characterized in that: The area of ​​the upper pressing plate is smaller than that of the lower pressing plate.

8. The tool for removing and installing the pins of the first-stage stator assembly of an auxiliary power unit according to claim 6, characterized in that: The distance adjustment mechanism comprises a connecting rod (2) and a locking mechanism (4); the upper pressing plate and / or the lower pressing plate are slidably arranged on the connecting rod (2); the first-stage stator assembly is sleeved on the connecting rod (2) between the upper pressing plate and the lower pressing plate; and the locking mechanism (4) presses the first-stage stator assembly between the upper pressing plate and the lower pressing plate.

9. The tool for removing and installing the pins of the first-stage stator assembly of an auxiliary power unit according to claim 8, characterized in that: The connecting rod (2) is a threaded rod, one end of which is fixedly connected to the center position of the upper surface of the lower pressure plate, a threaded hole is provided at the center of the upper pressure plate, the other end of the threaded rod passes through the threaded hole, and the locking mechanism (4) is a fixing nut sleeved on the threaded rod.

10. The tool for removing and installing pins of the first-stage stator assembly of an auxiliary power unit according to claim 9, characterized in that: One end of the threaded rod is connected to the center position of the upper surface of the lower pressing plate by welding.

Images