Aviation piston engine valve guide sleeve sediment removing device

Abstract

The utility model discloses an aviation piston engine valve guide sleeve sediment removing device which comprises a driving shaft, a plurality of drainage blades are installed on the outer side of the driving shaft, a plurality of carrier plates and transparent guide pipes are arranged on the outer side of the driving shaft, a plurality of cleaning brush wires are installed on the outer sides of the carrier plates, and the transparent guide pipes are arranged on the outer sides of the cleaning brush wires. A lower connecting block and an upper connecting block are mounted between the carrier plate and the driving shaft, a cooling channel is formed in the carrier plate, circulating cooling liquid is introduced into the cooling channel, and one end of each cleaning brush wire extends into the corresponding cooling channel; one section of the cleaning brush wire enters the cooling channel, so that heat generated during friction between the cleaning brush wire and the guide sleeve can be transmitted to the cooling liquid in the cooling channel in real time, and heat generated during friction between the cleaning brush wire and the inner wall of the guide sleeve can be absorbed in real time through flowing of the circulating cooling liquid in the cooling channel; thermal deformation of the guide sleeve caused by local overheating is avoided, and the problem of thermal damage caused by traditional mechanical cleaning is solved.

Description

Technical Field

[0001] This utility model relates to the field of valve guide sleeve cleaning technology, specifically a device for removing deposits from valve guide sleeves of aircraft piston engines. Background Technology

[0002] During the long-term operation of an aircraft piston engine, carbon deposits, sludge, and other impurities easily accumulate on the inner wall of the valve guide sleeve. This leads to a reduction in the clearance between the valve guide sleeve and the valve stem, causing problems such as valve sticking and decreased sealing performance, which seriously affects the engine's power performance and reliability. Therefore, regularly cleaning the deposits inside the valve guide sleeve is a critical part of engine maintenance.

[0003] Currently, mechanical cutting / grinding is a commonly used cleaning method, which removes deposits through the rotating cutting or friction of tools such as reamers, grinding heads, or wire brushes. However, in actual use, the friction between the brush and the inner wall of the guide sleeve generates high heat, which can easily cause damage. This results in problems such as high risk of thermal damage, insufficient cleaning uniformity, and potential debris contamination. Existing non-contact methods such as laser cleaning and pulsed airflow have limitations such as high equipment costs and poor adaptability to complex structures.

[0004] Therefore, this utility model provides a device for removing deposits from valve guide sleeves of aircraft piston engines. Utility Model Content

[0005] In view of the shortcomings of the prior art, this utility model provides a device for removing deposits from valve guide sleeves of aircraft piston engines to solve the above problems.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a device for removing deposits from valve guide sleeves of an aircraft piston engine, comprising a drive shaft, several guide vanes mounted on the outer side of the drive shaft, several carrier plates and a transparent guide tube disposed on the outer side of the drive shaft, wherein several cleaning brushes are mounted on the outer side of each of the carrier plates, a lower connecting block and an upper connecting block are installed between the carrier plates and the drive shaft, a cooling channel is formed inside the carrier plate, and circulating coolant flows through the cooling channel, one end of the cleaning brushes extends into the corresponding cooling channel, the drive shaft rotates at the end connection of the transparent guide tube, a transparent shield is slidably connected to the outer side of the transparent guide tube, and the carrier plates and the cleaning brushes are located inside the transparent shield.

[0007] Preferably, the drive shaft has an inlet channel and a outlet channel, and the drive shaft has a first through hole and a second through hole that communicate with the inlet channel and the outlet channel respectively. The cooling channel is connected to the internal space of the inlet channel through a lower connecting block, and the cooling channel is connected to the internal space of the outlet channel through an upper connecting block.

[0008] Preferably, the transparent guide tube is provided with a circulating cooling mechanism that drives the coolant inside the cooling channels. The circulating cooling mechanism includes a drive pump and a cooling device. Two connecting pipes and two docking rings are provided on one side of the drive pump. Both docking rings are rotatably connected to the outside of the drive shaft, and both docking rings have annular cavities on their inner sides. One docking ring corresponds to the position of the first through hole, and the other docking ring corresponds to the position of the second through hole.

[0009] Preferably, a diversion tube for guiding the cleaned material is installed on one side of the transparent guide tube, and the drainage blade is located below the connection between the diversion tube and the transparent guide tube.

[0010] Preferably, a retaining ring is installed on the outside of the transparent guide tube, and a return spring is installed between the retaining ring and the transparent shield.

[0011] Beneficial effects

[0012] Compared with the prior art, the present invention has the following advantages:

[0013] (1) This utility model allows a section of the cleaning brush bristles to enter the interior of the cooling channel, so that the heat generated when the cleaning brush bristles rub against the guide sleeve can be transferred to the coolant inside the cooling channel in real time. Through the flow of the circulating coolant inside the cooling channel, the heat generated by the friction between the cleaning brush bristles and the inner wall of the guide sleeve can be absorbed in real time, avoiding local overheating and thermal deformation of the guide sleeve, thus solving the problem of thermal damage in traditional mechanical cleaning.

[0014] (2) The guide blade of this utility model generates airflow power as the drive shaft rotates, which helps to push the debris out, and the airflow blows the cleaning brush bristles, further cooling the cleaning brush bristles. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0016] Figure 2 This is an exploded structural diagram of the present invention without the transparent guide tube;

[0017] Figure 3 This is the utility model Figure 2 A magnified view of the structure at point A in the middle;

[0018] Figure 4 This is the utility model Figure 2 A magnified schematic diagram of the structure at point B in the middle.

[0019] In the diagram: 1. Drive shaft; 11. Drain vane; 12. Liquid inlet channel; 121. First through hole; 13. Drain channel; 131. Second through hole; 2. Carrier plate; 21. Cleaning brush bristles; 22. Lower connecting block; 23. Upper connecting block; 24. Cooling channel; 3. Transparent guide tube; 31. Transparent shield; 32. Diverter tube; 33. Retaining ring; 34. Return spring; 4. Circulating cooling mechanism; 41. Drive pump; 42. Cooling device; 43. Connecting pipe; 44. Connecting ring; 441. Annular cavity. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-4 A device for removing deposits from valve guide sleeves of an aircraft piston engine includes a drive shaft 1, a plurality of drainage blades 11 mounted on the outside of the drive shaft 1, a plurality of carrier plates 2 and a transparent guide tube 3 disposed on the outside of the drive shaft 1.

[0022] Several cleaning brush bristles 21 are installed on the outer side of several carrier plates 2. A lower connecting block 22 and an upper connecting block 23 are installed between the carrier plate 2 and the drive shaft 1. A cooling channel 24 is opened in the carrier plate 2. Circulating coolant is introduced into the cooling channel 24. One end of the cleaning brush bristles 21 extends into the corresponding cooling channel 24.

[0023] It should be noted that both the lower connecting block 22 and the upper connecting block 23 described in this embodiment are provided with openings to allow coolant to pass through.

[0024] The drive shaft 1 rotates at the end of the transparent guide tube 3. A transparent shield 31 is slidably connected to the outside of the transparent guide tube 3. The carrier plate 2 and the cleaning brush bristles 21 are inside the transparent shield 31.

[0025] Specifically, to address the issue of high heat generation and potential damage caused by friction between the brush and the inner wall of the guide sleeve, this novel design replaces the traditional brush with a carrier plate 2 and cleaning bristles 21. The drive shaft 1 is connected to and supported by the carrier plate 2 via a lower connecting block 22 and an upper connecting block 23. Several cleaning bristles 21 on the carrier plate 2 clean the inner wall of the guide sleeve. A transparent guide tube 3 enters the guide sleeve, shielding the cleaned material. A transparent shielding cover 31 rests against the outside of the guide sleeve. The transparent guide tube 3 and the transparent shielding cover 31 protect the carrier plate 2 and the cleaning bristles 21, reducing debris. Splash contamination is eliminated, and a section of the cleaning bristles 21 enters the interior of the cooling channel 24. This allows the heat generated by the friction between the cleaning bristles 21 and the guide sleeve to be transferred to the coolant inside the cooling channel 24 in real time. Through the flow of the circulating coolant inside the cooling channel 24, the heat generated by the friction between the cleaning bristles 21 and the inner wall of the guide sleeve can be absorbed in real time, avoiding local overheating and thermal deformation of the guide sleeve. This solves the problem of thermal damage in traditional mechanical cleaning. The guide vanes 11 rotate with the drive shaft 1 to generate airflow power, which helps to push the debris out. The airflow also blows the cleaning bristles 21, further cooling the cleaning bristles 21.

[0026] In one embodiment of this utility model, such as Figures 1-4 As shown, the drive shaft 1 has an inlet channel 12 and a drain channel 13. The drive shaft 1 has a first through hole 121 and a second through hole 131 that communicate with the inlet channel 12 and the drain channel 13 respectively. The cooling channel 24 is connected to the internal space of the inlet channel 12 through the lower connecting block 22, and the cooling channel 24 is connected to the internal space of the drain channel 13 through the upper connecting block 23.

[0027] It should be noted that the first through hole 121 and the second through hole 131 described in this embodiment are staggered vertically.

[0028] Specifically, the coolant enters the cooling channel 24 through the inlet channel 12 and the first through hole 121, and flows into the drain channel 13 along the upper connecting block 23 and the second through hole 131 to form a circulation loop, ensuring that the coolant flows continuously in the cooling channel 24 and enhancing heat dissipation efficiency; the staggered distribution of the first through hole 121 and the second through hole 131 avoids mutual interference between the inlet and outlet, and improves the stability of the cooling system.

[0029] In one embodiment of this utility model, such as Figures 1-4As shown, a circulating cooling mechanism 4 for driving the coolant inside several cooling channels 24 is provided outside the transparent guide tube 3. The circulating cooling mechanism 4 includes a drive pump 41 and a cooling device 42. Two connecting pipes 43 and two docking rings 44 are provided on one side of the drive pump 41. Both docking rings 44 are rotatably connected to the outside of the drive shaft 1, and both docking rings 44 have annular cavities 441 on their inner sides. One docking ring 44 corresponds to the position of the first through hole 121, and the other docking ring 44 corresponds to the position of the second through hole 131.

[0030] Specifically, the drive pump 41 drives the coolant to be injected into the first through hole 121 and the second through hole 131 through the annular cavity 441 of the connecting pipe 43 and the docking ring 44, respectively, to achieve directional circulation of the coolant; the docking ring 44 is rotatably connected to the drive shaft 1 to ensure that the cooling circuit is continuously connected when the drive shaft 1 rotates, avoiding the pipe entanglement problem caused by traditional fixed connection and improving the reliability of the device operation.

[0031] In one embodiment of this utility model, such as Figures 1-4 As shown, a diversion pipe 32 for guiding the cleaned material is installed on one side of the transparent guide pipe 3, and the diversion blade 11 is located below the connection between the diversion pipe 32 and the transparent guide pipe 3.

[0032] It should be noted that the shunt pipe 32 described in this embodiment is connected to an external storage device.

[0033] Specifically, the diversion pipe 32 guides the debris cleaned by the cleaning bristles 21 to an external storage device by airflow or gravity, preventing debris from remaining inside the guide sleeve; the guide vanes 11 generate airflow power as the drive shaft 1 rotates, which helps to push the debris towards the diversion pipe 32, improving the collection efficiency of the cleaned material and reducing the risk of secondary pollution. At the same time, the airflow generated by the guide vanes 11 can cool the cleaning bristles 21 and enhance the cooling effect.

[0034] In one embodiment of this utility model, such as Figures 1-4 As shown, a retaining ring 33 is installed on the outside of the transparent guide tube 3, and a return spring 34 is installed between the retaining ring 33 and the transparent shield 31.

[0035] Specifically, in the initial stage of use, the transparent shield 31 is placed against the end of the guide sleeve, covering the guide sleeve. As the carrier plate 2 and the transparent guide tube 3 extend into the guide sleeve for cleaning, the transparent shield 31 slides outside the transparent guide tube 3. The transparent guide tube 3 is supported by the return spring 34 through the retaining ring 33. The return spring 34 pushes the transparent shield 31, so that the transparent shield 31 can stably contact the guide sleeve and maintain a stable splash and radiation protection function.

[0036] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0037] Working principle: This device drives the carrier plate 2 and cleaning bristles 21 to rotate via the drive shaft 1 to rub and peel off the deposits on the inner wall of the valve guide sleeve. At the same time, the circulating coolant in the cooling channel 24 forms a closed loop through the inlet channel 12 and the outlet channel 13. The coolant is injected by the drive pump 41 through the docking ring 44 and the annular cavity 441 to absorb the frictional heat of the bristles and then returns to the cooling device 42 for cooling. The transparent shield 31 intercepts the debris and guides the debris to the external storage device through the diversion pipe 32 by the airflow generated by the rotation of the guide vane 11. The airflow of the guide vane 11 also assists in the cooling of the bristles, forming a synergistic working principle of "mechanical cleaning + circulating cooling + airflow debris collection + flexible pressure regulation", which solves the problems of thermal damage, debris contamination and insufficient uniformity of traditional mechanical cleaning.

[0038] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for removing deposits from valve guide sleeves of an aircraft piston engine, comprising a drive shaft (1), characterized in that, Several drainage blades (11) are installed on the outside of the drive shaft (1), and several carrier plates (2) and transparent guide tubes (3) are provided on the outside of the drive shaft (1). A plurality of cleaning bristles (21) are installed on the outer side of a plurality of the carrier plates (2). A lower connecting block (22) and an upper connecting block (23) are installed between the carrier plate (2) and the drive shaft (1). A cooling channel (24) is provided inside the carrier plate (2). Circulating coolant is introduced into the cooling channel (24). One end of the cleaning bristles (21) extends into the corresponding cooling channel (24). The drive shaft (1) rotates at the end connection of the transparent guide tube (3), and a transparent shield (31) is slidably connected to the outside of the transparent guide tube (3). The carrier plate (2) and the cleaning brush bristles (21) are located inside the transparent shield (31).

2. The device for removing deposits from valve guide sleeves of an aircraft piston engine according to claim 1, characterized in that, The drive shaft (1) is provided with an inlet channel (12) and a drain channel (13). The drive shaft (1) is provided with a first through hole (121) and a second through hole (131) that communicate with the inlet channel (12) and the drain channel (13) respectively. The cooling channel (24) is connected to the internal space of the inlet channel (12) through the lower connecting block (22), and the cooling channel (24) is connected to the internal space of the drain channel (13) through the upper connecting block (23).

3. The device for removing deposits from valve guide sleeves of an aircraft piston engine according to claim 2, characterized in that, The transparent guide tube (3) is provided with a circulating cooling mechanism (4) for driving the coolant inside the cooling channels (24). The circulating cooling mechanism (4) includes a drive pump (41) and a cooling device (42). The drive pump (41) is provided with two connecting pipes (43) and two docking rings (44) on one side. Both docking rings (44) are rotatably connected to the outside of the drive shaft (1), and both docking rings (44) are provided with an annular cavity (441) on the inner side. One of the docking rings (44) corresponds to the position of the first through hole (121), and the other docking ring (44) corresponds to the position of the second through hole (131).

4. The device for removing deposits from valve guide sleeves of an aircraft piston engine according to claim 1, characterized in that, A diversion pipe (32) for guiding the cleaned material is installed on one side of the transparent guide pipe (3), and the drainage blade (11) is located below the connection between the diversion pipe (32) and the transparent guide pipe (3).

5. The device for removing deposits from valve guide sleeves of an aircraft piston engine according to claim 1, characterized in that, A retaining ring (33) is installed on the outside of the transparent guide tube (3), and a return spring (34) is installed between the retaining ring (33) and the transparent shield (31).

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