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Engine cylinder cover parameter measuring instrument and method based on optical fiber probe

A technology of engine cylinder head and optical fiber probe, which is applied in the direction of instruments, measuring heat, measuring devices, etc., can solve the problems of inconvenient long-distance transmission, complicated installation and debugging, large measurement error, etc., and achieves easy long-distance transmission and low cost , the effect of small structure

Inactive Publication Date: 2013-01-02
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The thermocouple is used as a sensor to detect temperature, the speed is slow, the measurement error is large, the installation and debugging are complicated, and it is not convenient for long-distance transmission

Method used

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  • Engine cylinder cover parameter measuring instrument and method based on optical fiber probe
  • Engine cylinder cover parameter measuring instrument and method based on optical fiber probe
  • Engine cylinder cover parameter measuring instrument and method based on optical fiber probe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Firstly, surface treatment is carried out on the U-shaped groove 3 . For the U-shaped groove 3, rust spots and oxides should be removed, and then oil, grease and other pollutants should be removed with acetone and alcohol; The adhesive bead is 4-6mm, and then the adhesive bead is smoothly connected along the U-shaped groove 3 to produce an adhesive line about 1mm thick, and then the fiber grating is placed in the adhesive, making sure that it is located in the U-shaped groove 3. And make the coating section and the encapsulation section stick to the sheet. Taking the first group of optical fibers as an example, place the optical fibers at measuring points 12, 13, and 14 first, and then place the optical fiber at measuring point 11. At measuring point 11, press the metal tube of the optical fiber at measuring point 11 on top of the optical fibers at 12, 13, and 14.

[0044] In addition, considering the small diameter of the optical fiber itself, U-shaped grooves can be...

Embodiment 2

[0046] Eight gratings 6 are engraved on one optical fiber 5, corresponding to eight measurement points respectively, to realize quasi-distributed measurement. Such as Figure 4 shown.

[0047] Sealing: Sealing is crucial to the normal operation of the cylinder, so it is necessary to seal the joint between the cylinder and the cylinder head. More adhesive should be added to the seal so that the adhesive is higher than the plane of the fire surface. Then sand the raised bond until it is flush with the fire surface. Finally, when it is combined with the cylinder body, a sealant is applied to the fire surface for sealing.

[0048] Drill a hole 10 on the side of the cylinder head 4, lay the packaged sensor 1 directly along the side wall of the cylinder head 4, and use a high-temperature sealant to coat and cure the hole 10 on one side of the cylinder head 4 to seal in the curing test.

[0049] Sensor cylinder head installation: Drill a round hole with a diameter of 1mm on the s...

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Abstract

The invention discloses an engine cylinder cover parameter measuring instrument and method based on an optical fiber probe. A U-shaped groove is formed on the fire force surface of a cylinder cover; a plurality of holes are drilled in the side surfaces of the cylinder cover; the holes have two type, one type of holes are extended to a cooling water cavity wall surface from the side of the cylinder cover, and the other type of holes are extended to a cast iron part between the water cavity wall surface and the fire force surface from the side of the cylinder cover; optical fiber grating sensors are paved in the U-shaped groove, the holes and the cooling water cavity wall surface; and the output ends of the optical fiber grating sensors are connected with an optical fiber grating demodulation device. The instrument and the method have the beneficial effect that the device can test the temperature of the cylinder cover, the stress and the pressure.

Description

technical field [0001] The invention specifically discloses an engine cylinder head parameter measuring instrument and method based on an optical fiber probe. Background technique [0002] Engine cylinder head is one of the important parts of the engine, its strength and reliability are an important part of the engine strength and reliability issues. The cylinder head is mainly composed of cylinder head body, intake port, exhaust port, oil nozzle, rocker arm mechanism and other parts, which are pressed on the flange plane of the cylinder liner and tightly connected with the cylinder body through bolts. The main function is to seal The cylinder, together with the piston top and the inner wall of the cylinder, constitutes the combustion space of the engine. The long-term working of the engine cylinder head at high temperature will lead to the reduction of the strength of the cylinder head material, and the reduction of the material strength means that the cylinder head will b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K11/32G01K11/3206
Inventor 蒋奇李国祥胡玉平樊晓军刘守洪
Owner SHANDONG UNIV