Engine alternator dismounting device and method
By using the DC generator disassembly and assembly device, which combines a pressure plate and an adapter rod, the problem of wrenches being difficult to use vertically during DC generator disassembly and assembly is solved. This enables a single person to quickly and safely disassemble and install the generator, improving maintenance efficiency and quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- STATE-OWNED SICHUAN WEST MASCH FACTORY
- Filing Date
- 2022-11-18
- Publication Date
- 2026-05-05
AI Technical Summary
In the existing technology, the disassembly and assembly process of DC generators requires two people to work together. It is difficult to keep the rotation axis of the wrench perpendicular to the plane corresponding to the fixing nut, resulting in low disassembly and assembly efficiency and easy damage to the engine, affecting maintenance quality and safety.
The device employs an engine DC generator disassembly and assembly mechanism, including a pressure plate, an adapter rod, bolts, and sleeves. The cooperation between the pressure plate and the adapter rod ensures that the axis of the adapter rod is perpendicular to the plane of the fixing nut. The wrench connection structure enables a single person to quickly disassemble or install the fixing nut, and the positioning tube improves accuracy.
It enables efficient and safe disassembly and assembly of DC generators, avoids oil leakage faults, improves maintenance efficiency and quality, and can be completed by a single person.
Smart Images
Figure CN115890178B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of aircraft engine maintenance technology, specifically to a device and method for disassembling and installing a DC generator on an engine. Background Technology
[0002] During flight, after the engine starts, the DC generator converts mechanical energy into electrical energy to power the aircraft's electrical equipment and charge the battery. When the aircraft starts, the DC generator, powered by the battery, acts as an electric motor to accelerate the engine. Once the engine reaches a certain speed, it ignites and operates. Therefore, the DC generator also functions as a starter motor and is an indispensable and crucial piece of equipment for the engine. The DC generator is connected to the aircraft accessory housing, with the connection surface sealed by a graphite seal. This seal utilizes the contact between the graphite ring and the rotor to achieve an oil sealing effect. During use, improper assembly or concentricity deviations in the graphite seal can lead to oil leakage at the connection point. This leakage directly results in reduced engine lubrication, decreased internal pressure, and increased lubricant consumption. In case of a malfunction, maintenance personnel need to remove the DC generator's retaining nut, replace or repair the graphite seal, troubleshoot the problem, and then reinstall the DC generator.
[0003] Currently, troubleshooting requires two people working together: one person ensures the wrench's rotation axis is perpendicular to the plane corresponding to the DC generator's mounting nut, while the other applies torque to the wrench. Because it's difficult to maintain a relatively fixed alignment between the wrench's rotation axis and the DC generator's mounting nut, slippage can easily occur during DC generator assembly and disassembly, potentially damaging the engine. The installation process can also cause deviations in the graphite sealing device, reducing maintenance efficiency and, more importantly, affecting maintenance quality, potentially leading to DC generator oil leaks. Summary of the Invention
[0004] The present invention first provides an engine DC generator disassembly and assembly device, the purpose of which is to improve the disassembly and assembly efficiency and quality of DC generators.
[0005] The technical solution adopted in this invention is as follows: an engine DC generator disassembly and assembly device, including a pressure plate, an adapter rod, bolts, and sleeves. The pressure plate has a circular central hole, in which the adapter rod is placed. The adapter rod consists of an upper section and a lower section. The upper section is located in the central hole and has a clearance fit with the central hole. The outer diameter of the lower section is larger than the diameter of the central hole. The top of the upper section is provided with a wrench connection structure, and the bottom of the lower section is provided with at least three claw heads along the circumferential direction. The pressure plate has at least three fixing holes arranged on a circle with the central hole as the center. A bolt is installed in each of the at least three fixing holes. Each bolt is equipped with a sleeve. The sleeves are of equal length, and internal threads are provided at both ends of each sleeve. The bolt and the internal thread at one end of the sleeve are adapted and threadedly connected.
[0006] Specifically: The pressure plate is circular and has six fixing holes. The angle between any two adjacent fixing holes and the central hole is equal.
[0007] Specifically: There are four claws at the bottom of the adapter rod, and the central angle formed by any two adjacent claws and the center of the bottom is a right angle.
[0008] Specifically: the pressure plate, adapter rod, bolts and sleeves are all made of No. 45 steel.
[0009] Furthermore, the wrench connection structure is as follows: the top of the adapter rod is provided with an adapter hole, the center line of the adapter hole coincides with the center line of the adapter rod, and the adapter hole is in the shape of a regular square prism.
[0010] Furthermore, a through hole is provided between the center of the top and bottom of the adapter rod. The section of the through hole near the top is in the shape of a regular square prism and serves as the adapter hole, while the section of the through hole near the bottom is in the shape of a cylinder, and the diameter of the cylinder is greater than the diagonal length of the square corresponding to the regular square prism.
[0011] Furthermore, a positioning tube is installed in the through hole at the bottom of the adapter rod. The positioning tube consists of an upper section and a lower section. The outer diameter of the upper section is smaller than that of the lower section, and the outer diameter of the upper section is matched with the diameter of the cylindrical positioning tube.
[0012] This invention also provides a method for disassembling and assembling an engine DC generator. Using any of the aforementioned engine DC generator disassembly and assembly devices, the fixing nut of the DC generator is disassembled or installed. First, one end of the sleeve is threadedly connected to the screw around the DC generator, and the claw of the adapter rod is placed into the slot of the fixing nut. Second, the pressure plate is moved so that the center hole of the pressure plate is located at the mounting platform formed by the upper and lower sections of the adapter rod. Third, the pressure plate is rotated so that the fixing hole is aligned with the sleeve, and one end of the sleeve is fixedly connected to the pressure plate using bolts. Finally, the wrench is engaged with the wrench connection structure at the top of the adapter rod, and the fixing nut is disassembled or installed by rotating the wrench.
[0013] Furthermore, before placing the claw of the adapter rod into the slot of the fixing nut, the lower section of the positioning tube is inserted into the hole in the middle of the fixing nut, and the upper section of the positioning tube is inserted into the through hole at the bottom of the adapter rod, while the claw at the bottom of the adapter rod is placed into the slot of the fixing nut.
[0014] The beneficial effects of this invention are as follows: The DC generator disassembly and assembly device and method are used for the disassembly and assembly of the fixing nut of the DC generator, and also for the disassembly and assembly of the graphite sealing device. It features convenient and quick disassembly and assembly, safety and reliability, and can quickly resolve oil leakage faults in field DC generators. Moreover, it can be operated by a single person. The top of the adapter rod is equipped with a wrench connection structure for engagement with a wrench. The bottom of the adapter rod is equipped with a claw head for engagement with the fixing nut of the DC generator, enabling the disassembly and assembly of the fixing nut through the adapter rod. On the outer side of the adapter rod, a pressure plate is provided at the mounting platform between the upper and lower sections. The pressure plate not only secures the claw head in the groove of the fixing nut, but also ensures that the axial direction of the adapter rod remains perpendicular to the plane corresponding to the fixing nut, preventing slippage between the adapter rod and the fixing nut. The adapter rod can also be used for the disassembly and assembly of the graphite sealing device, avoiding deviations during installation, thus ensuring the safety of the graphite sealing device and effectively solving oil leakage faults in DC generators.
[0015] A positioning tube is installed in the through hole at the bottom of the adapter rod to facilitate quick and accurate positioning of the bottom of the adapter rod and further prevent slippage between the adapter rod and the fixing nut. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the engine DC generator disassembly and assembly device of the present invention in use.
[0017] Figure 2 yes Figure 1 The example shown is a view of the adapter rod directly at its bottom.
[0018] Reference numerals: 1. Pressure plate; 2. Adapter rod; 21. Claw head; 22. Adapter hole; 3. Bolt; 4. Sleeve; 5. Positioning tube; 6. Screw. Detailed Implementation
[0019] The invention will now be further described with reference to the accompanying drawings.
[0020] The first subject of this invention is an engine DC generator disassembly and assembly device, such as... Figure 1As shown, the assembly includes a pressure plate 1, an adapter rod 2, bolts 3, and sleeves 4. The pressure plate 1 has a circular central hole, which is located at any position on the pressure plate and penetrates through it. The central hole is generally located at the geometric center of the pressure plate 1, and the adapter rod 2 is placed inside the central hole. For example, the pressure plate 1 is circular, and the central hole is located at the center of the circle. The pressure plate 1 has at least three fixing holes arranged on a circle centered on the central hole. These fixing holes penetrate the pressure plate 1, and each of the at least three fixing holes contains a bolt 3. Each bolt 3 is equipped with a sleeve 4, and all sleeves 4 are of equal length. Each sleeve 4 has internal threads at both ends. The bolt 3 is threaded to the internal thread at one end of the sleeve 4. Both ends of the sleeve 4 have internal threads; one end is used to connect to the bolt 3, and the other end is used to connect to other objects to provide support, such as a screw rod 6. (See [reference]). Figure 1 To provide stable support for the pressure plate 1, it is supported by at least three sleeves 4, which are bolted together. For example, the pressure plate 1 has six fixing holes, and the angle between any two adjacent fixing holes and the center hole is equal. To ensure the strength of the engine DC generator disassembly and assembly device, the pressure plate 1, adapter rod 2, bolts 3, and sleeves 4 are all made of metal, for example, all of which are made of 45# steel.
[0021] The adapter rod 2 consists of an upper section and a lower section. The upper section is located inside the central hole and has a clearance fit with the central hole, allowing the upper section to slide and rotate relative to the central hole. The outer diameter of the lower section is larger than the diameter of the central hole. The adapter rod 2 is tapered at the top and thicker at the bottom, preventing the lower section from passing through the central hole. The upper and lower sections of the adapter rod 2 are a single unit, with the end face of the upper section being the top and the end face of the lower section being the bottom. A wrench connection structure is provided at the top of the upper section of the adapter rod 2. This wrench connection structure is used to engage with a wrench, allowing the adapter rod 2 to rotate. For example, the wrench connection structure may have an adapter hole 22 at the top of the adapter rod 2, with the center line of the adapter hole 22 coinciding with the center line of the adapter rod 2. The adapter hole 22 is a regular square prism, which can be a blind hole or a through hole. Alternatively, the wrench connection structure may also involve shaping the upper section of the adapter rod 2 near the top into a regular square prism or other prism shape. The lower end of the adapter rod 2 is provided with at least three claws 21 along the circumferential direction. These claws 21 are used to insert into slots of objects to be disassembled or installed. For example, see... Figure 2 The bottom of the adapter rod 2 has four claws 21, and the central angle formed by any two adjacent claws 21 and the center of the bottom is a right angle.
[0022] To prevent the adapter rod 2 from becoming too heavy, a through hole is provided between the center of the top and bottom ends of the adapter rod 2. The section of the through hole near the top is shaped like a regular square prism and forms the adapter hole 22. The section of the through hole near the bottom end of the adapter rod 2 is cylindrical. Because the adapter rod 2 is tapered at the top and thicker at the bottom, the diameter of the cylinder is greater than the diagonal length of the square corresponding to the regular square prism. (See [reference]). Figure 2 To facilitate the alignment of the adapter rod 2 with the object to be disassembled or installed, and to allow the claw head 21 to quickly and accurately insert into the slot of the object, a positioning tube 5 is installed in the through hole at the bottom of the adapter rod 2. The positioning tube 5 consists of an upper section and a lower section, which are integrated as a single unit. The outer diameter of the upper section is smaller than that of the lower section, and the outer diameter of the upper section is adapted to the diameter of the cylindrical positioning tube 5. The upper section is used to mate with the object to be disassembled or installed. (See [reference]). Figure 1 .
[0023] The second subject of this invention is a method for disassembling and assembling a DC generator, which involves removing or installing the fixing nut of the DC generator according to the first subject mentioned above, including the following steps:
[0024] First, thread one end of the sleeve 4 to the screw 6 around the DC generator, and then insert the claw 21 of the adapter rod 2 into the slot of the fixing nut of the DC generator. For example, thread 3 to 6 sleeves 4 to the screw 6 around the DC generator, and then insert the claw 21 of the adapter rod 2 into the slot of the fixing nut. To facilitate the accurate insertion of the claw 21 of the adapter rod 2 into the slot of the fixing nut, a positioning tube 5 can be used. The lower section of the positioning tube 5 is inserted into the hole in the middle of the fixing nut, and the upper section of the positioning tube 5 is inserted into the through hole at the bottom of the adapter rod 2, so that the claw 21 at the bottom of the adapter rod 2 is inserted into the slot of the fixing nut. Since the lower section of the positioning tube 5 is located in the hole in the middle of the fixing nut, the positioning tube 5 extends the length of the fixing nut and the adapter rod 2 relative to each other, making it easier for the adapter rod 2 to slip off from the fixing nut. Second, move the pressure plate 1 so that the center hole of the pressure plate 1 is located at the mounting platform formed by the upper and lower sections of the adapter rod 2. Next, rotate the pressure plate 1 to align the fixing hole with the sleeve 4, and then fix one end of the sleeve 4 to the pressure plate 1 using bolts 3. At this point, if it is necessary to remove the fixing nut, a gap is reserved between the mounting platform formed by the upper and lower sections of the adapter rod 2 and the pressure plate 1 to accommodate the displacement of the fixing nut during disassembly; if the fixing nut is to be installed, no gap is needed between the mounting platform formed by the upper and lower sections of the adapter rod 2 and the pressure plate 1. Finally, engage the wrench with the wrench connection structure at the top of the adapter rod 2, and rotate the wrench to remove or install the fixing nut.
[0025] This invention achieves efficient and precise disassembly and installation of the fixing nut of the engine DC generator, reducing engine maintenance costs, shortening engine maintenance cycle, and achieving the effect of quickly completing engine troubleshooting.
Claims
1. An engine-DC generator disassembly and assembly device, characterized in that: The device includes a pressure plate (1), an adapter rod (2), a bolt (3), and a sleeve (4). The pressure plate (1) has a circular central hole, in which the adapter rod (2) is placed. The adapter rod (2) consists of an upper section and a lower section. The upper section is located in the central hole and is clearance-fitted with the central hole. The outer diameter of the lower section is larger than the diameter of the central hole. The top of the upper section is provided with a wrench connection structure, and the bottom of the lower section is provided with at least three claws (21) along the circumferential direction. The pressure plate (1) has at least three fixing holes arranged on a circle with the central hole as the center. Each of the at least three fixing holes is provided with a bolt (3). Each bolt (3) is equipped with a sleeve (4). The lengths of the sleeves (4) are equal. Each end of the sleeve (4) is provided with an internal thread. The bolt (3) is adapted to the internal thread at one end of the sleeve (4) and is threadedly connected.
2. The engine DC generator disassembly and assembly device as described in claim 1, characterized in that: The pressure plate (1) is circular and has six fixing holes. The angle between any two adjacent fixing holes and the central hole is equal.
3. The engine DC generator disassembly and assembly device as described in claim 1, characterized in that: The adapter rod (2) has four claws (21) at the bottom end, and the central angle formed by any two adjacent claws (21) and the center of the bottom end is a right angle.
4. The engine DC generator disassembly and assembly device as described in claim 1, characterized in that: The pressure plate (1), adapter rod (2), bolt (3) and sleeve (4) are all made of No. 45 steel.
5. The engine DC generator disassembly and assembly device as described in any one of claims 1 to 4, characterized in that: The wrench connection structure is as follows: the top of the adapter rod (2) is provided with an adapter hole (22), the center line of the adapter hole (22) coincides with the center line of the adapter rod (2), and the adapter hole (22) is in the shape of a regular square prism.
6. The engine DC generator disassembly and assembly device as described in claim 5, characterized in that: A through hole is provided between the center of the top end and the center of the bottom end of the adapter rod (2). The section of the through hole near the top end is in the shape of a regular square prism and serves as the adapter hole (22). The section of the through hole near the bottom end is in the shape of a cylinder, and the diameter of the cylinder is greater than the diagonal length of the square corresponding to the regular square prism.
7. The engine DC generator disassembly and assembly device as described in claim 6, characterized in that: A positioning tube (5) is installed in the through hole at the bottom of the adapter rod (2). The positioning tube (5) consists of an upper section and a lower section. The outer diameter of the upper section is smaller than that of the lower section. The outer diameter of the upper section is matched with the diameter of the cylindrical positioning tube (5).
8. A method for disassembling and assembling an engine-DC generator, characterized in that: To disassemble or install the fixing nut of the DC generator using the engine DC generator disassembly and assembly device according to any one of claims 1 to 7, firstly, thread one end of the sleeve (4) to the screw (6) around the DC generator, and place the claw (21) of the adapter rod (2) into the slot of the fixing nut; secondly, move the pressure plate so that the center hole of the pressure plate is located at the mounting platform formed by the upper and lower sections of the adapter rod (2); thirdly, rotate the pressure plate so that the fixing hole is aligned with the sleeve (4), and fix one end of the sleeve (4) to the pressure plate with the bolt (3); finally, engage the wrench with the wrench connection structure at the top of the adapter rod (2), and disassemble or install the fixing nut by rotating the wrench.
9. The method for disassembling and assembling an engine DC generator as described in claim 8, characterized in that: Before placing the claw (21) of the adapter rod (2) into the slot of the fixing nut, insert the lower section of the positioning tube (5) into the hole in the middle of the fixing nut, and then insert the upper section of the positioning tube (5) into the through hole at the bottom of the adapter rod (2), while simultaneously placing the claw (21) at the bottom of the adapter rod (2) into the slot of the fixing nut.
Citation Information
Patent Citations
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