Special tool for measuring stroke of airplane electromagnetic valve steel ball

Abstract

The invention belongs to the technical field of aviation equipment, and discloses a special tool for measuring the stroke of an airplane electromagnetic valve steel ball. Comprising a valve fixing seat, a measuring core rod, an adjusting screw rod, a screw rod fixing sleeve, a spring, a pressing block fixing screw rod and a valve fixing pressing block, the upper valve seat is mounted from a right end hole of the valve fixing seat, the valve fixing pressing block is L-shaped, an open slot is formed in the upper part of the valve fixing pressing block, and the pressing block fixing screw rod is screwed from the open slot to fix the upper valve seat; the screw rod fixing sleeve is tightly pressed into the inner hole in the left end of the valve fixing seat by controlling the tolerance between the outer circle of the screw rod fixing sleeve and the inner hole in the left end of the valve fixing seat, and the adjusting screw rod is in threaded connection in the screw rod fixing sleeve; the spring and the outer shaft of the measuring core rod are integrally arranged from an inner hole at the right end of the adjusting screw rod, and the adjusting screw rod is screwed; the measuring core rod is jacked into the upper valve seat, the spring is compressed, the dial indicator is installed, and the measuring core rod is jacked tightly; the upper valve seat is electrified, the spring rebounds, the steel ball moves to the leftmost end of the stroke, and the moving stroke of the steel ball is accurately read through the degree of the dial indicator.

Description

Technical Field

[0001] This invention relates to the field of aviation equipment technology, and in particular to a special tooling for measuring the stroke of the steel ball of an aircraft electromagnetic valve. Background Technology

[0002] The electromagnetic valve controls the switching of the hydraulic circuit in the aircraft landing gear retraction system. According to the aircraft maintenance process requirements, the electromagnetic valve needs to be tested after maintenance. A steel ball of size 2.381 G5±0 GB308 is installed in the upper valve seat of the electromagnetic valve. The upper valve seat is an irregularly shaped part, and the travel of the steel ball in the upper valve seat needs to be measured to ensure that the travel of the steel ball is (0.2-0.25) mm. This ensures that the electromagnetic valve is assembled correctly, thereby ensuring the quality of aircraft maintenance and ensuring the safe take-off and landing of the aircraft.

[0003] The existing technology is that the structure of the aircraft solenoid valve is complex, small and precise, and the upper valve seat is an irregularly shaped part. The fixing method must be reliable. The stroke value to be measured is relatively small, which is (0.2-0.25) mm. A single aircraft is equipped with a pair of solenoid valves. This aircraft is a new model that has been introduced to the factory. There was no dedicated measuring tooling before. Therefore, there is an urgent need for a dedicated stroke measuring tooling that can securely fix the upper valve seat. A dedicated measuring core rod pushes the steel ball to move. The stroke of the steel ball is detected by measuring the movement distance of the core rod with a dial indicator. Summary of the Invention

[0004] In view of this, the present invention provides a special tooling for measuring the stroke of the steel ball of an aircraft electromagnetic valve, used to perform functional testing of the electromagnetic valve after maintenance. This ensures the quality of aircraft electromagnetic valve maintenance and guarantees the switching of the hydraulic circuit of the aircraft landing gear retraction system.

[0005] The technical solution of this invention is as follows: A special tooling for measuring the stroke of an aircraft electromagnetic valve ball includes a valve fixing seat 1, a measuring core rod 5, an adjusting screw 6, a screw fixing sleeve 7, a spring 8, a pressure block fixing screw 9, and a valve fixing pressure block 10; the upper valve seat is inserted into the right end hole of the valve fixing seat 1; the valve fixing pressure block 10 is L-shaped with an opening groove on its upper part for adjusting the position of the valve fixing pressure block 10 to ensure the upper valve seat is fixed; the pressure block fixing screw 9 is tightened from the opening groove to fix the upper valve seat; the tolerance between the outer circle of the screw fixing sleeve 7 and the inner hole at the left end of the valve fixing seat 1 is controlled. Press the screw fixing sleeve 7 tightly into the inner hole at the left end of the valve fixing seat 1, and thread the adjusting screw 6 into the screw fixing sleeve 7; after the spring 8 is fitted onto the outer shaft of the measuring core rod 5, the two are inserted together from the inner hole at the right end of the adjusting screw 6, and the adjusting screw 6 is tightened to ensure that the left end of the upper valve seat is fixed and that the upper valve seat is fixed; the measuring core rod 5 is pushed into the upper valve seat, the spring 8 is compressed, and the steel ball is pushed to the rightmost end of the stroke; install the dial indicator and tighten the measuring core rod 5; when the upper valve seat is energized, the spring 8 rebounds, and the steel ball moves to the leftmost end of the stroke. The stroke of the steel ball is accurately read by the dial indicator.

[0006] The dial indicator, the inner hole at the left end of the valve fixing seat, the hole at the right end of the valve fixing seat, the screw fixing sleeve 7, the adjusting screw 6, and the measuring core rod 5 are horizontally concentric; the valve fixing seat 1 has a sliding hole for the dial indicator rod, the measuring position is adjusted, and the thread is tightened to fix the dial indicator rod.

[0007] The beneficial effects of this invention are as follows: This invention enables the smooth conduct of aircraft electromagnetic valve function tests through mechanical operation, achieves accurate measurement of steel ball travel, and ensures the maintenance quality of aircraft electromagnetic valves, thereby ensuring the maintenance quality of aircraft landing gear. Attached Figure Description

[0008] Figure 1 These are illustrations showing the effects of using the present invention; (a) is an overall schematic diagram, and (b) is a side view.

[0009] Figure 2 This is a schematic diagram of the valve fixing seat of the present invention; (a) is a front view, (b) is a side view, and (c) is a cross-sectional view AA of (a);

[0010] Figure 3 This is a schematic diagram of the dial indicator fixing component of the present invention; (a) is a front view, and (b) is a side view.

[0011] Among them, 1-gate fixing seat, 2-base plate, 3-dial indicator fixing part, 4-dial indicator fixing bolt, 5-measuring core rod, 6-adjusting screw, 7-screw fixing sleeve, 8-spring, 9-pressure block fixing screw, 10-gate fixing pressure block. Detailed Implementation

[0012] To reduce processing difficulty, the valve fixing seat and the base plate 2 are welded together. The upper valve seat is inserted into the right end hole of the valve fixing seat 1. The valve fixing pressure block 10 has an opening groove, which can be adjusted to ensure the upper valve seat is fixed. Tighten the pressure block fixing screw 9 to fix the right end of the upper valve seat. By controlling the tolerance between the outer circle of the screw fixing sleeve 7 and the inner hole of the left end of the valve fixing seat 1, the screw fixing sleeve 7 is pressed tightly into the inner hole of the left end of the valve fixing seat 1. The adjusting screw 6 is connected to the screw fixing sleeve 7 by threads, which allows the adjusting screw 6 to move forward and backward. After the spring 8 is put into the measuring core rod 5, the measuring core rod 5 is inserted into the adjusting screw 6 through the inner hole of the right end of the adjusting screw 6. Tighten the adjusting screw 6 to ensure the left end of the upper valve seat is fixed, thus ensuring the upper valve seat is fixed. The measuring rod 5 can be inserted into the upper valve seat, pushing the steel ball to the rightmost end of its travel. A dial indicator is installed, and the measuring rod 5 is tightened. When the upper valve seat is energized, the spring 8 returns, and the steel ball moves to the leftmost end of its travel. The travel distance of the steel ball is accurately read by the dial indicator reading. The dial indicator is fixed to the valve seat 1 via the dial indicator fixing part 3 and the dial indicator fixing bolts.

[0013] The dial indicator, the two end holes of the valve mounting base 1, the screw fixing sleeve 7, the adjusting screw 6, and the measuring core rod 5 are horizontally concentric. The valve mounting base 1 has a sliding hole for the dial indicator rod. After adjusting the measuring position, tighten the thread to fix the dial indicator rod.

[0014] The installation process is as follows:

[0015] (1) By controlling the tolerance between the outer circle of the screw fixing sleeve 7 and the inner hole of the left end of the valve fixing seat 7, the screw fixing sleeve 7 is pressed tightly into the inner hole of the left end of the valve fixing seat 1 to ensure that the two ends of the upper valve fixing seat are horizontal and concentric.

[0016] (2) The dial indicator, the two end holes of the valve fixing seat 1, the screw fixing sleeve 7, the adjusting screw 6 and the measuring core rod 5 are horizontally concentric.

[0017] (3) The valve fixing seat 1 has a dial indicator rod sliding hole. Adjust the measuring position and tighten the thread to fix the dial indicator rod.

[0018] The dimensions of the base plate 2 are adjustable; it can be lengthened or widened. Additionally, the inner hole and outer dimensions of the left end of the valve mounting base 1 are also adjustable. This design reduces machining difficulty; the inner holes and outer dimensions of both ends of the valve mounting base 1 are identical. All alternative designs must be able to securely mount the valve to the solenoid valve and be able to measure the steel ball stroke as (0.2-0.25) mm.

Claims

1. A special tooling for measuring the stroke of a steel ball in an aircraft electromagnetic valve, characterized in that, The system includes a valve fixing seat (1), a measuring core rod (5), an adjusting screw (6), a screw fixing sleeve (7), a spring (8), a pressure block fixing screw (9), and a valve fixing pressure block (10). The upper valve seat is inserted into the right end hole of the valve fixing seat (1). The valve fixing pressure block (10) is L-shaped and has an opening groove on its upper part, which is used to adjust the position of the valve fixing pressure block (10) to ensure that the upper valve seat is fixed. The pressure block fixing screw (9) is tightened from the opening groove to fix the upper valve seat. By controlling the tolerance between the outer circle of the screw fixing sleeve (7) and the inner hole of the left end of the valve fixing seat (1), the screw fixing sleeve (7) is pressed tightly into the valve seat. The inner hole at the left end of the door fixing seat (1) is connected to the screw fixing sleeve (7) by the adjusting screw (6). After the spring (8) is fitted onto the outer shaft of the measuring core rod (5), the two are inserted into the inner hole at the right end of the adjusting screw (6) as a whole. The adjusting screw (6) is tightened to ensure that the left end of the upper valve seat is fixed and that the upper valve seat is fixed. The measuring core rod (5) is pushed into the upper valve seat, the spring (8) is compressed, and the steel ball is pushed to the rightmost end of the stroke. The dial indicator is installed and the measuring core rod (5) is tightened. When the upper valve seat is energized, the spring (8) rebounds and the steel ball moves to the leftmost end of the stroke. The stroke of the steel ball is accurately read by the dial indicator.

2. The special tooling for measuring the stroke of the steel ball of an aircraft electromagnetic valve according to claim 1, characterized in that, The dial indicator, the inner hole at the left end of the valve fixing seat, the hole at the right end of the valve fixing seat, the screw fixing sleeve (7), the adjusting screw (6), and the measuring core rod (5) are horizontally concentric; the valve fixing seat (1) has a sliding hole for the dial indicator rod, the measuring position is adjusted, and the thread is tightened to fix the dial indicator rod.

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