Piston type aero-engine cylinder wall thickness detection device and method

Abstract

The invention discloses a piston type aero-engine cylinder wall thickness detection device and method. The device comprises a vernier caliper; the movable long clamping foot is movably arranged on the movable clamping foot of the vernier caliper in a sliding fit mode, and the tail end of the movable long clamping foot is provided with a ball head tangent to the circumferential arc of the inner wall of the designated part of the exhaust passage during measurement; the fixed long clamping foot is fixedly arranged on the fixed clamping foot of the vernier caliper, and the tail end of the fixed long clamping foot is provided with a measuring rod which abuts against the circumferential arc of the outer wall of the designated part of the exhaust passage during measurement; and the positioning device is matched with the movable long clamping pin and the fixed long clamping pin and is used for limiting the angular position of the movable clamping pin and the depth of the movable clamping pin penetrating into the exhaust passage. The method is simple and rapid, accurate in positioning, easy to master, low in cost, high in flexibility and wide in application, and can realize rapid detection of the wall thickness of the engine exhaust passage and timely discover and eliminate potential safety hazards.

Description

technical field

[0001] The present application relates to the technical field of mechanical measurement, in particular, to a device and method for detecting the wall thickness of a piston-type aeroengine cylinder. Background technique

[0002] The air-cooled cylinder of the aviation piston engine is composed of an aluminum alloy casting cylinder head and a steel cylinder barrel. , The wall thickness of the exhaust passage is guaranteed by the mold, and the finished product inspection generally does not need to check the cylinder wall thickness. The wall thickness of the exhaust channel 8 of individual cylinders is unqualified due to the deviation of the casting sand core, which affects the strength of the exhaust channel of the cylinder head. See figure 1 . Through force analysis and calculation, it is found that the thermal stress of the exhaust duct is relatively large, and the weakest position of its structure and the most concentrated stress are at the parting surface ...

Examples

Embodiment Construction

[0047] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and embodiments.

[0048] refer to figure 2 , the preferred embodiment of the present application provides a piston-type aero-engine cylinder wall thickness detection device, including a vernier caliper 1, a movable long clip 2, a fixed long clip 4, and a positioning device, wherein,

[0049] The movable long clamping foot 2 is slidably arranged on the movable clamping foot of the vernier caliper, and the end of the movable long clamping foot 2 is provided with a ball head that is tangent to the circumferential arc of the inner wall of the designated part of the exhaust passage during measurement. 22. The designated part is the place where the wall thickness of the exhaust duct is to be measured; when tang...

technical field

[0001] The present application relates to the technical field of mechanical measurement, in particular, to a device and method for detecting the wall thickness of a piston-type aeroengine cylinder. Background technique

[0002] The air-cooled cylinder of the aviation piston engine is composed of an aluminum alloy casting cylinder head and a steel cylinder barrel. , The wall thickness of the exhaust passage is guaranteed by the mold, and the finished product inspection generally does not need to check the cylinder wall thickness. The wall thickness of the exhaust channel 8 of individual cylinders is unqualified due to the deviation of the casting sand core, which affects the strength of the exhaust channel of the cylinder head. See figure 1 . Through force analysis and calculation, it is found that the thermal stress of the exhaust duct is relatively large, and the weakest position of its structure and the most concentrated stress are at the parting surface ...

Examples

Embodiment Construction

[0047] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and embodiments.

[0048] refer to figure 2 , the preferred embodiment of the present application provides a piston-type aero-engine cylinder wall thickness detection device, including a vernier caliper 1, a movable long clip 2, a fixed long clip 4, and a positioning device, wherein,

[0049] The movable long clamping foot 2 is slidably arranged on the movable clamping foot of the vernier caliper, and the end of the movable long clamping foot 2 is provided with a ball head that is tangent to the circumferential arc of the inner wall of the designated part of the exhaust passage during measurement. 22. The designated part is the place where the wall thickness of the exhaust duct is to be measured; when tang...

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