CN-117446198-B - Assembling method for combined block pipe joint of hydraulic system of aircraft actuator

CN117446198BCN 117446198 BCN117446198 BCN 117446198BCN-117446198-B

Abstract

The method for assembling the pipe joint of the combined block of the hydraulic system of the aircraft actuator is used for realizing the accurate assembly between the elbow joint and the base of the combined block, firstly, a measuring reference conversion assembly is adopted to respectively export the perpendicular distances between the intersection points of two central axes of a first elbow joint and a second elbow joint and the upper end standard surface of the base of the combined block, then the assembly dimension B which can be measured is determined according to the exported values, then the assembly dimension B which can be measured is taken as the reference dimension, and then the assembly of the elbow joint on the combined block is completed by means of an assembly fixture of the hydraulic system of the aircraft actuator. The assembling method of the combined block pipe joint of the hydraulic system of the aircraft actuator meets the assembling size requirement of the elbow joint on the combined block in the aircraft maintenance process, and achieves the purpose of ensuring the aircraft maintenance quality and safe flight.

Inventors

GUO XINGUANG
ZHAO GUANGXUE
CAO HAO
HU SHUXIN
ZHU XIHUA
TANG HONGXIA
ZHU WEIYING
LI ZHENGYAN
Jin Menglai
ZHANG LONGFEI
LI QIANG
GAO XIAOFEI

Assignees

中国人民解放军第五七二一工厂

Dates

Publication Date: 20260505
Application Date: 20231103

Claims (5)

1. The method for assembling the combined block pipe joint of the hydraulic system of the aircraft actuator is characterized by comprising the following specific operation steps of: a. Inserting a reference conversion positioning block (12-4) into a radial through hole of a reference conversion measuring rod (12-1), assembling the reference conversion measuring rod (12-1) and an adjusting rod (12-3), enabling the inner side end of the adjusting rod (12-3) to prop against the reference conversion positioning block (12-4), measuring the distance between the top of the reference conversion measuring rod (12-1) and the inner side end face of the adjusting rod (12-3), fixing the adjusting rod (12-3) through a locking screw (12-5) if the measured distance value is L1, and replacing the reference conversion positioning blocks (12-4) with different specifications if the measured distance value is deviated from L1 until the measured distance value is L1, and fixing the adjusting rod (12-3) and the reference conversion measuring rod (12-1) through a locking screw (12-5); b. Sleeving a reference conversion positioning sleeve (12-2) outside a reference conversion measuring rod (12-1), screwing the reference conversion positioning sleeve (12-2) to enable the end face of the reference conversion positioning sleeve (12-2) to prop against a reference conversion positioning block (12-4), and locking and fixing the reference conversion positioning sleeve (12-2) and the reference conversion measuring rod (12-1) through a locking screw (12-5) when the distance between the conical surface center of the reference conversion measuring rod (12-1) and the end face of the reference conversion positioning sleeve (12-2) is L1; c. Assembling a first elbow joint (2) with an elbow joint port fixing assembly (10) and a first elbow joint measuring frame (6) of an aircraft actuator hydraulic system assembling tool, ensuring that after the assembling position of a positioning body (10-3) of the elbow joint port fixing assembly (10) in the aircraft actuator hydraulic system assembling tool meets the assembling requirement, locking and fixing the positioning body (10-3) through an inner fixed sleeve (10-4) of the elbow joint port fixing assembly (10), and pre-assembling a first elbow joint measuring frame fixing seat (7) and a first elbow joint measuring frame (6) of the aircraft actuator hydraulic system assembling tool; d. Removing a reference conversion positioning block (12-4) in the measurement reference conversion assembly (12), assembling the measurement reference conversion assembly (12) with the first elbow joint (2), and locking and fixing the reference conversion positioning sleeve (12-2) with the first elbow joint (2) through a locking screw (12-5) after the conical surface of the reference conversion measurement rod (12-1) is in contact with the cut-off surface (10-3-1) at one end of the positioning body (10-3); e. Screwing a pipe joint positioning cap (11) matched with the first elbow joint (2) to enable the pipe joint positioning cap to be in contact with the upper end face of the reference conversion positioning sleeve (12-2), inserting a measuring ruler into a first axial through hole (7-2) of a first elbow joint measuring frame fixing seat (7), measuring the distance dimension B from the upper end face of the first elbow joint measuring frame fixing seat (7) to the upper end face of the pipe joint positioning cap (11), recording specific data of the dimension B as new reference data, and removing a measuring reference conversion assembly (12); f. Assembling the first elbow joint (2) with the combined block base (1), and adjusting the assembling height of the first elbow joint (2) to enable the distance between the upper end surface of the first elbow joint measuring rack fixing seat (7) and the upper end surface of the pipe joint positioning cap (11) to be B; g. and (3) in the combined block pipe joint of the hydraulic system of the aircraft actuator is identical to the first elbow joint (2) in assembly structure, and the assembly of the second elbow joint (3) and the combined block base (1) is completed according to the operation process from the step a to the step f.
2. The method for assembling a combined block pipe joint of an aircraft actuator hydraulic system according to claim 1, wherein in the step a, the L1 size can be obtained by measuring the depth measuring rod of a vernier caliper extending into an eccentric square hole (12-1-1) of a reference conversion measuring rod (12-1) or by measuring the distance between the tip of a conical surface of the reference conversion measuring rod (12-1) and a reference conversion positioning block (12-4).
3. The method for assembling the combined block pipe joint of the hydraulic system of the aircraft actuator according to claim 1 or 2, wherein in the step c, the posture of the cut-off surface (10-3-1) of the positioning body (10-3) after the assembly meets the assembly requirement is ensured by matching the positioning mark (10-3-2) on the positioning body (10-3) with the alignment mark on the first elbow joint.
4. The method for assembling the combined block pipe joint of the hydraulic system of the aircraft actuator according to claim 3, wherein in the step d, the reference conversion positioning sleeve (12-2) is screwed, the conical surface top end of the reference conversion measuring rod (12-1) is moved towards the direction of the positioning body (10-3) of the port fixing assembly (10) of the elbow joint by matching the internal thread of the reference conversion positioning sleeve (12-2) with the external thread of the first elbow joint (2), and the screwing action of the reference conversion positioning sleeve (12-2) is stopped when the conical surface of the reference conversion measuring rod (12-1) is perceived to be contacted with the cutting surface (10-3-1) at one end of the positioning body (10-3).
5. The method for assembling the combined block pipe joint of the hydraulic system of the aircraft actuator, which is characterized in that in the step e, the depth measuring rods of the vernier calipers extend into three groups of first axial through holes (7-2) of the first elbow joint measuring frame fixing seat (7) respectively, the distance dimension B from the upper end face of the first elbow joint measuring frame fixing seat (7) to the upper end face of the pipe joint positioning cap (11) is measured, when the setting precision requirement is not met in three measurement data, the pipe joint positioning cap (11) matched with the first elbow joint (2) can be unscrewed first, the depth of screwing the first elbow joint (2) into the combined block base (1) is adjusted, then the pipe joint positioning cap (11) matched with the first elbow joint (2) is screwed, and the measuring process of the distance dimension B from the upper end face of the first elbow joint measuring frame fixing seat (7) to the upper end face of the pipe joint positioning cap (11) is repeatedly utilized by the vernier calipers until the three measurement data all meet the setting precision requirement.

Description

Assembling method for combined block pipe joint of hydraulic system of aircraft actuator Technical Field The invention relates to a method for assembling a pipe joint of a hydraulic system, in particular to a method for assembling an elbow joint on a hydraulic system combination block of an aircraft lifting aileron actuator. Background As shown in fig. 1 to 3, a combined block component of an aircraft aileron actuator hydraulic system comprises a combined block base 1 and a group of pipe joints mounted on the combined block base 1, wherein the pipe joints consist of four parts, namely a first elbow joint 2, a second elbow joint 3, a first straight joint 4 and a second straight joint 5. The combined block part plays a role of communicating and switching in the hydraulic system of the aircraft lifting aileron actuator, wherein a pipe joint is respectively connected with a pipeline of the hydraulic system of the aircraft lifting aileron actuator and a hose of the lifting aileron servo actuator, hydraulic oil enters the combined block through a high-pressure oil supply pipe, enters a high-pressure cavity of the aileron actuator through the hose, converts hydraulic energy into mechanical energy, and then enters a low-pressure loop of the combined block from a low-pressure cavity of the aileron actuator through the hose to flow back to a fuselage. In the assembly process of the assembly block components, if the assembly dimensional accuracy of the pipe joint cannot be ensured, a gap is reserved between the pipe joint and the assembly block base 1, so that when the assembly block works, under the impact of hydraulic pulsation, a sealing ring arranged between a pipe joint positioning cap and the assembly block base 1 can be extruded, even broken and the sealing is invalid, so that hydraulic oil is leaked, particularly the assembly dimensions L1 and L2 of the elbow joint shown in the figure 2 are difficult to accurately measure, if the traditional assembly process is adopted, the assembly dimensional accuracy cannot be ensured, the problem of hydraulic oil leakage is solved, and when the hydraulic oil leakage reaches a certain value, an alarm lamp of an aircraft hydraulic system shines, the hydraulic oil pressure is reduced, the normal pressure supply of the hydraulic system cannot be met, the normal power supply of an aircraft landing gear, a rudder, an lifting aileron and other operating systems cannot be provided, and the system operation is invalid, so that the flight safety is seriously endangered. Disclosure of Invention The invention provides an assembly method of a combined block pipe joint of an aircraft actuator hydraulic system, which is used for meeting the assembly size requirement of an elbow joint on a combined block in the aircraft maintenance process and achieving the purpose of ensuring the aircraft maintenance quality and safe flight. In order to achieve the above purpose, the invention adopts the following technical scheme: the method for assembling the pipe joint of the combined block of the hydraulic system of the aircraft actuator is characterized by comprising the following specific operation steps of: a. Inserting a reference conversion positioning block into a radial through hole of a reference conversion measuring rod, assembling the reference conversion measuring rod and an adjusting rod, enabling the inner side end of the adjusting rod to prop against the reference conversion positioning block, measuring the distance between the top of the reference conversion measuring rod and the inner side end surface of the adjusting rod, fixing the adjusting rod through a locking screw if the measured distance value is L1, and replacing the reference conversion positioning blocks with different specifications if the measured distance value is deviated from L1 until the measured distance value is L1, and fixing the adjusting rod and the reference conversion measuring rod through the locking screw; b. Sleeving the reference conversion positioning sleeve outside the reference conversion measuring rod, screwing the reference conversion positioning sleeve to enable the end face of the reference conversion positioning sleeve to prop against the reference conversion positioning block, wherein the distance between the conical surface center of the reference conversion measuring rod and the end face of the reference conversion positioning sleeve is L1, and locking and fixing the reference conversion positioning sleeve and the reference conversion measuring rod through a locking screw; c. Assembling a first elbow joint, an elbow joint port fixing assembly and a first elbow joint measuring frame of an aircraft actuator hydraulic system assembling tool, after ensuring that the assembling position of a positioning body of the elbow joint port fixing assembly in the aircraft actuator hydraulic system assembling tool meets the assembling requirement, locking and fixing the positioning body through an inner fixed s