Lubricating and tensioning device of aero-engine chain

Abstract

The invention discloses a lubricating and tensioning device for an aero-engine chain, and relates to the technical field of engine chains, the lubricating and tensioning device comprises an engine cylinder body, an engine oil pipe outlet, an oil nozzle lubricating assembly and a tensioning plate guide rail, a guide rail support is fixedly installed on one side of the engine cylinder body through bolts, a tensioning plate guide rail tightly attached to the position of an engine chain is fixedly installed on one side of the guide rail support through a middle bolt, a fixing shaft is arranged on the inner side of the tensioning plate guide rail, and the outer wall of the fixing shaft is sleeved with a torsion spring. Two end shafts of the torsion spring are in contact with the tensioning plate guide rail and the inner supporting face of the guide rail support respectively, the tensioning plate guide rail is driven to surround the middle bolt through the elastic force of the torsion spring, the tensioning plate guide rail is tightly attached to the chain, chain looseness is dynamically compensated, and the problem that after aero-engine timing chains are axially overlaid, the tensioning plate guide rail cannot rotate is solved. And lubricating and tensioning problems of an oil pump chain and the like are solved.

Description

Technical Field

[0001] The invention relates to the technical field of engine chains, in particular to a lubricating and tensioning device for an aircraft engine chain. Background Art

[0002] Aircraft engine chains are a crucial component of the engine's timing system, precisely controlling the synchronized movement of the valves and camshaft to ensure efficient engine operation. These chains must possess high strength, wear resistance, high temperature resistance, and lightweight properties to withstand the extreme operating environments of aircraft engines.

[0003] However, the existing aircraft engine chain lubrication and tensioning devices have the following problems during use: when multiple chains are transmitted in the traditional engine cylinder, the axial superposition makes it impossible to arrange the lubrication box tensioning device on the outer end chain due to space limitations, making it impossible to install the hydraulic tensioner in the area without lubricating oil pipes, and splash lubrication is difficult to meet the high-speed and high-torque requirements. Summary of the Invention

[0004] The purpose of the present invention is to provide an aluminum pot coating adhesion testing device to solve the problems related to space limitation, insufficient lubrication and dynamic tensioning difficulties in multi-chain transmission of aircraft engines.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a wastewater treatment device at a metal surface, comprising an engine cylinder block, an engine oil pipe outlet, an oil nozzle lubrication assembly and a tensioning plate guide rail, wherein the engine oil pipe outlet position is threadedly installed with an oil nozzle lubrication assembly, a guide rail bracket is fixedly installed on one side of the engine cylinder block by bolts, and a tensioning plate guide rail that fits tightly with the engine chain position is fixedly installed on one side of the guide rail bracket by an intermediate bolt, a fixed shaft is provided on the inner side of the tensioning plate guide rail, and a torsion spring is provided on the outer wall of the fixed shaft, and the shafts at both ends of the torsion spring are respectively in contact with the tensioning plate guide rail and the inner support surface of the guide rail bracket.

[0006] As a preferred solution of the lubrication and tensioning device of an aircraft engine chain of the present invention, the oil nozzle lubrication assembly consists of an oil nozzle, a sealing O-ring, a fixing bolt and an oil nozzle bolt. An oil hole is opened at the center position inside the oil nozzle bolt, and a sealing O-ring is sleeved on the axial diameter portion of the oil nozzle and adapted to the oil nozzle bolt. The sealing O-ring is used to seal, throttle and prevent leakage at the oil nozzle bolt position.

[0007] As a preferred solution of the lubrication and tensioning device for an aircraft engine chain of the present invention, the outer wall of the oil nozzle is fixedly fitted to the upper end surface of the oil nozzle bolt by a fixing bolt.

[0008] As a preferred solution of the lubrication and tensioning device for an aircraft engine chain of the present invention, an oil window is provided on the inner wall of the tensioning plate guide rail, and the position of the oil window is aligned with the outlet of the oil injector.

[0009] As a preferred solution of the lubrication and tensioning device for an aircraft engine chain of the present invention, the guide rail bracket and the fixed shaft are both provided with threaded grooves that engage with the outer wall of the middle bolt.

[0010] As a preferred solution of the lubrication and tensioning device of an aircraft engine chain of the present invention, the intermediate bolt flange surface is tightly attached to the outer wall of the tensioning plate guide rail, and a movable gap is left between the tensioning plate guide rail and the guide rail bracket through a fixed axis to facilitate the movement of the torsion spring.

[0011] The lubrication and tensioning device for an aircraft engine chain of the present invention has the following beneficial effects: 1. The present invention drives the tensioning plate guide rail around the middle bolt through the elastic force of the torsion spring, so that the tensioning plate guide rail is closely attached to the chain, dynamically compensating for chain slack, and solving the problem of lubrication and tensioning of the oil pump chain, etc. after the aircraft engine timing chain is axially superimposed.

[0012] 2. The present invention is connected to the oil pipe through the position of the oil nozzle. High-pressure lubricating oil is sprayed through the oil nozzle to form an oil column. The oil column passes through the fixed shaft at the tensioning plate guide until it contacts the contact surface between the chain and the tensioning plate guide. This structure realizes sealing through the sealing O-ring to accurately control the oil volume and injection direction, meeting the lubrication requirements of the chain at the tensioning position and the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the disassembled structure of the oil nozzle lubrication assembly of the present invention; Figure 3 This is a schematic diagram of the disassembled structure of the guide rail bracket of the present invention; Figure 4 It is a schematic diagram of the engine cylinder assembly structure of the present invention.

[0014] In the figure: 1. Grease nozzle lubrication assembly; 2. Guide rail bracket; 3. Tensioning plate guide; 4. Intermediate bolt; 5. Torsion spring; 6. Oil nozzle; 7. Sealing O-ring; 8. Fixing bolt; 9. Oil nozzle bolt; 10. Fixed shaft; 11. Oil window. DETAILED DESCRIPTION

[0015] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0016] Example 1, as Figure 1-2 As shown, the present invention provides a technical solution: a lubrication and tensioning device for an aircraft engine chain, comprising an engine cylinder block, an engine oil pipe outlet, an oil nozzle lubrication assembly 1 and a tensioning plate guide rail 3. The engine oil pipe outlet is threadedly mounted with an oil nozzle lubrication assembly 1, the oil nozzle lubrication assembly 1 being composed of an oil nozzle 6, a sealing O-ring 7, a fixing bolt 8 and an oil nozzle bolt 9. An oil hole is provided at the center of the oil nozzle bolt 9. A sealing O-ring 7 is sleeved on the axial diameter portion of the oil nozzle 6 to match the oil nozzle bolt 9, and the sealing O-ring 7 is used to seal, throttle and prevent leakage at the position of the oil nozzle bolt 9. The outer wall of the oil nozzle 6 is fixed to the oil nozzle bolt 9 by the fixing bolt 8. The upper end surface of the tensioning plate guide rail 3 is fixedly fitted, and an oil window 11 is provided on the inner wall of the tensioning plate guide rail 3, and the position of the oil window 11 is aligned with the outlet of the fuel injector 6. A sealing O-ring 7 is provided through the axial diameter portion of the fuel injector 6, and the sealing O-ring 7 is used to seal the throttling and leakage-proofing of the fuel injector bolt 9. The fuel injector 6 is connected with the oil pipe, and high-pressure lubricating oil is sprayed through the fuel injector 6 to form an oil column, and the oil column passes through the fixed shaft 10 at the tensioning plate guide rail 3 until it contacts the contact surface of the chain and the tensioning plate guide rail 3. This structure realizes sealing and precise control of the oil amount and injection direction through the sealing O-ring 7, thereby meeting the lubrication requirements of the chain at the tensioning position and the engine.

[0017] Example 2, as Figure 1-4 As shown, the present invention provides a technical solution: a lubrication and tensioning device for an aircraft engine chain, comprising a guide rail bracket 2 fixedly installed on one side of an engine cylinder body by bolts, and a tensioning plate guide rail 3 that is tightly fitted with the engine chain position is fixedly installed on one side of the guide rail bracket 2 by an intermediate bolt 4, a fixed shaft 10 is provided on the inner side of the tensioning plate guide rail 3, and a torsion spring 5 is sleeved on the outer wall of the fixed shaft 10, and the two end shafts of the torsion spring 5 are respectively in contact with the tensioning plate guide rail 3 and the inner support surface of the guide rail bracket 2, the guide rail bracket 2 and the fixed shaft 10 are both provided with a threaded groove that meshes with the outer wall of the intermediate bolt 4, the flange surface of the intermediate bolt 4 is tightly attached to the outer wall of the tensioning plate guide rail 3, and the tensioning plate guide rail 3 and the guide rail bracket 2 are connected by the fixed shaft 10 A movable gap is left to facilitate the movement of the torsion spring 5. The elastic force of the torsion spring 5 drives the tensioning plate guide rail 3 to surround the middle bolt 4, so that the tensioning plate guide rail 3 is positioned close to the chain, dynamically compensating for chain slack, and solving the problem of lubrication and tensioning of the oil pump chain, etc. after the axial superposition of the aircraft engine timing chain.

[0018] Working principle: First, fix the nozzle lubrication assembly 1 at the engine oil pipe outlet through threads, and fix the nozzle 6 at the nozzle bolt 9 through the fixing bolt 8, and achieve a sealing effect through the sealing O-ring 7, and align the nozzle 6 with the oil window 11. Then, rotate the bolt to fix the guide rail bracket 2 at one side of the engine cylinder block, and then set the torsion spring 5 on the guide rail bracket 2 and the tensioning plate guide rail 3. Then, pass the middle bolt 4 through the tensioning plate guide rail 3 and engage with the inner wall thread of the fixed shaft 10. Fix the guide rail bracket 2 and the tensioning plate guide rail 3 through the middle bolt 4, and the tensioning plate guide rail 3 is aligned with the engine. The engine chain fits together, and the elastic force of the torsion spring 5 drives the tensioning plate guide 3 around the middle bolt 4, so that the tensioning plate guide 3 is closely attached to the chain, dynamically compensating for the chain slack, and solving the problem of lubrication and tensioning of the oil pump chain, etc. after the aircraft engine timing chain is axially superimposed. The oil nozzle 6 is connected to the oil pipe, and high-pressure lubricating oil is sprayed through the oil nozzle 6 to form an oil column, and the oil column passes through the fixed shaft 10 at the tensioning plate guide 3 until it contacts the contact surface of the chain and the tensioning plate guide 3. This structure realizes sealing and precise control of the oil amount and injection direction through the sealing O-ring 7, thereby meeting the lubrication requirements of the chain at the tensioning position and the engine.

[0019] Finally, it should be noted that the above content is only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Simple modifications or equivalent substitutions of the technical solution of the present invention by ordinary technicians in this field do not deviate from the essence and scope of the technical solution of the present invention.

Claims

1. A lubricating and tensioning device for an aircraft engine chain, comprising an engine cylinder block, an engine oil pipe outlet, an oil nozzle lubricating assembly (1) and a tensioning plate guide rail (3), characterized in that: An oil nozzle lubrication assembly (1) is threadedly mounted at the outlet of the engine oil pipe, a guide rail bracket (2) is fixedly mounted on one side of the engine cylinder block via bolts, and a tensioning plate guide rail (3) that is tightly fitted with the engine chain position is fixedly mounted on one side of the guide rail bracket (2) via an intermediate bolt (4), a fixed shaft (10) is provided on the inner side of the tensioning plate guide rail (3), and a torsion spring (5) is sleeved on the outer wall of the fixed shaft (10), and the shafts at both ends of the torsion spring (5) are in contact with the tensioning plate guide rail (3) and the inner support surface of the guide rail bracket (2), respectively.

2. The lubricating and tensioning device for an aircraft engine chain according to claim 1, characterized in that: The oil nozzle lubrication assembly (1) is composed of an oil nozzle (6), a sealing O-ring (7), a fixing bolt (8) and an oil nozzle bolt (9). An oil hole is provided at the center position of the oil nozzle bolt (9). A sealing O-ring (7) that matches the oil nozzle bolt (9) is sleeved on the axial diameter portion of the oil nozzle (6). The sealing O-ring (7) is used to seal the oil nozzle bolt (9) for throttling and preventing leakage.

3. The lubricating and tensioning device for an aircraft engine chain according to claim 2, characterized in that: The outer wall of the oil injection nozzle (6) is fixedly fitted to the upper end surface of the oil nozzle bolt (9) via a fixing bolt (8).

4. The lubricating and tensioning device for an aircraft engine chain according to claim 1, characterized in that: An oil window (11) is provided on the inner wall of the tensioning plate guide rail (3), and the oil window (11) is aligned with the outlet of the oil injection nozzle (6).

5. The lubricating and tensioning device for an aircraft engine chain according to claim 1, characterized in that: The guide rail bracket (2) and the fixed shaft (10) are both provided with threaded grooves that engage with the outer wall of the middle bolt (4).

6. The lubricating and tensioning device for an aircraft engine chain according to claim 1, characterized in that: The flange surface of the intermediate bolt (4) is in close contact with the outer wall of the tensioning plate guide rail (3), and a movable gap is left between the tensioning plate guide rail (3) and the guide rail bracket (2) via the fixed shaft (10) to facilitate the movement of the torsion spring (5).

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