Simulation gap measuring tool for air inlet channel and flow channel of engine
By designing a simulated gap measurement tool including a positioning block, a measuring plate, a dial indicator mounting base, a support column, a calibration block and a base, the problem of accurately positioning and measuring the gap between the engine inlet duct flow channel and the compressor rotor blade is solved, damage during the assembly process is avoided, and accurate measurement and safe assembly are achieved.
Patent Information
- Application Number
- CN202422950070.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-02
- Publication Date
- 2025-10-14
- Estimated Expiration
- 2034-12-02
AI Technical Summary
It is difficult to accurately control and measure the minimum gap between the engine inlet flow channel and the compressor rotor blades with existing technologies, especially when the axial position of the compressor rotor moves forward, which can easily cause damage.
A simulated gap measurement tool was designed, which included a positioning block, a measuring plate, a dial indicator mounting base, a support column, a calibration block and a base. The dial indicator was used to measure and correct the value L=0.052 to ensure accurate positioning and measurement.
The accurate positioning and measurement of the gap between the engine inlet flow channel and the compressor rotor blades is achieved, which avoids damage during the assembly process and ensures the accuracy and safety of the measurement.
Smart Images
Figure CN223435551U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of tooling components, and in particular relates to a tool for measuring the simulated clearance of an engine intake duct flow channel. Background Art
[0002] During assembly of a small turboshaft engine, the clearance between the inlet duct and the compressor rotor blades must be controlled to a value of 0.25 ± 0.05 mm. The primary factor influencing this clearance is their relative axial position. If the compressor rotor axial position shifts forward relative to the inlet, the first point of contact with the inlet is the sharp point at the maximum diameter of the compressor rotor blade, which is 113 mm. This makes the clearance between the inlet duct and the compressor blade difficult to control. Utility Model Content
[0003] The purpose of the utility model is to provide an intake duct simulation gap measurement tool to accurately locate and measure the minimum gap between the engine flow duct and the compressor impeller.
[0004] The technical solution of the utility model is: a tool for measuring the simulated gap of an engine intake duct flow channel, comprising a positioning block, a measuring plate, a dial indicator mounting seat, a support column, a calibration block and a base; the base is fixed with a support column, the upper end of the support column is mounted with a measuring plate, the measuring plate is provided with a matching hole, and the positioning block is assembled in the matching hole; the dial indicator mounting seat is installed on the measuring plate with an interference fit, and a dial indicator is installed on the dial indicator mounting seat; the base is provided with a balancing hole seat for placing the calibration block.
[0005] Furthermore, the axial spacing of the air inlet duct is Lj=J+L, where J is the measurement difference, and the probe correction value L=0.052.
[0006] The beneficial effects of the present invention are: it effectively solves the problem of gap control and measurement between the engine inlet duct and the compressor rotor blades, provides an effective measurement method for measurements that require simulation of the minimum contact gap, and avoids destructive damage to the inlet duct and the compressor rotor blades during the assembly process. BRIEF DESCRIPTION OF THE DRAWINGS
[0007] Figure 1 This is a schematic diagram of the structure of the engine intake duct flow channel simulation gap measurement tool of the utility model;
[0008] Figure 2 This is a cross-sectional diagram of the application of the engine intake duct simulation gap measurement tool of the utility model;
[0009] The reference numerals in the accompanying drawings are: 1- positioning block, 2- M4 hexagon socket screw, 3- measuring plate, 4- dial indicator mounting base, 5- M4 column head screw, 6- support column, 7- dial indicator, 8- calibration block, 9- base;
[0010] 100- Utility model measuring tool, 200- Intake duct assembly. DETAILED DESCRIPTION
[0011] The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
[0012] like Figure 1 As shown, the utility model is a tool for measuring the simulated clearance of an engine intake duct flow channel, comprising: a positioning block 1, a measuring plate 3, a dial indicator mounting seat 4, a support column 6, a calibration block 8 and a base 9; the base 9 is fixed with a support column 6, the upper end of the support column is mounted with a measuring plate 3, the measuring plate is provided with a matching hole, the positioning block 1 is assembled in the matching hole, and the positioning block 1 is used to position the intake duct assembly concentrically; the dial indicator mounting seat 4 is interference fit mounted on the hole seat at the contour diameter d of the measuring plate; a dial indicator is mounted on the dial indicator mounting seat, which is adjusted and fixed by an M4 column head screw 5; the base 9 is provided with a balancing hole seat for placing a calibration block, and the calibration block is used to calibrate the reading of the dial indicator before measurement.
[0013] In the present invention, the intake duct assembly 200 is placed on the positioning block 1 of the measuring tool 100. Here, the intake duct of the intake duct assembly is tangent to the positioning outer circle of the positioning block, with a clearance of 0.007 to 0.012 mm. This ensures that the intake duct contacts the sharp point of the compressor rotor blade at its maximum diameter, d, of 113 mm. This ensures that the axial spacing of the intake ducts at the measured position is accurate when rotating the intake duct assembly 200.
[0014] In the above embodiment, the calibration block 8 is placed on the measuring plate 3 of the measuring tool of the present invention to calibrate the initial dial indicator reading. After calibration, the calibration block 8 is placed in the balancing hole seat of the base 9. The intake duct assembly 200 is placed on the measuring plate 3, and the dial indicator measurement value here is measured. The difference between the measurement and the initial reading is J. The correction value of the axial distance between the ball head R2.3 and the intake duct contact point is L. According to the flow duct flow curve, L is calculated to be 0.052. The axial spacing of the intake duct Lj = J + 0.052, where J is the measurement difference and 0.052 (L) is the probe correction value. Figure 2 shown.
Claims
1. A tool for measuring the simulated clearance of an engine intake duct, characterized by: The invention comprises a positioning block, a measuring plate, a dial indicator mounting seat, a support column, a calibration block and a base; a support column (6) is fixed on the base (9), a measuring plate (3) is mounted on the upper end of the support column, a matching hole is provided on the measuring plate, and the positioning block (1) is assembled in the matching hole; the dial indicator mounting seat (4) is installed on the measuring plate with an interference fit, and a dial indicator is installed on the dial indicator mounting seat; a balancing hole seat is provided on the base (9) for placing the calibration block (8).
2. The engine intake duct simulation gap measurement tool according to claim 1, characterized in that: The axial spacing of the air inlet duct is Lj=J+L, where J is the measurement difference and the probe correction value L=0.052.