Measuring device capable of monitoring thickness of boundary film of piston ring-cylinder sleeve friction pair in real time
A real-time monitoring and measuring device technology, applied in measuring devices, instruments, scanning probe microscopy, etc., can solve the problems of difficult to achieve real-time monitoring, difficult to apply piston ring-cylinder liner friction pair, etc., to achieve high precision and operation. simple effect
Pending Publication Date: 2022-06-03
HARBIN ENG UNIV
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Problems solved by technology
The existing boundary film thickness measurement device and method are: the rotary seal boundary film thickness measurement method, the patent of publication number CN103954243A, which proposes an indirect measurement of boundary film thickness by measuring active elements through scanning electron microscope and ray photoelectron energy spectrometer method, but it is difficult to apply to the piston ring-cylinder liner friction pair, and this method is an indirect method, which requires the test piece to be removed after the friction process for measurement, and it is difficult to achieve the purpose of real-time monitoring
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[0020] The present invention will be further described below with reference to the accompanying drawings.
[0021] according to figure 1 and figure 2 , The measuring device for real-time monitoring of the thickness of the boundary film of the friction pair between the piston ring and the cylinder liner of the present invention includes a scale 1, a mechanical arm 2, an atomic force microscope 3, a load applying mechanism 4, an atom probe 5, a piston ring 6, and a cylinder liner test piece. 7. Temperature sensor 8 , clamp 9 , oil box 10 , elastic fixing device 11 , support stand 12 , heating device 13 , reciprocating device 14 and guide rail 15 .
[0022] The guide rail 15 is installed on the support table 12, and the reciprocating motion device 14 is installed on the guide rail 15; the mechanical arm bracket with the scale 1 is installed near the dead point on the support table 12, and the mechanical arm bracket with the scale is installed on the mechanical arm bracket. Arm...
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The invention discloses a measuring device capable of monitoring the thickness of a piston ring-cylinder sleeve friction pair boundary film in real time, and the device comprises a guide rail disposed on a supporting rack, and a reciprocating motion device is disposed on the guide rail. A mechanical arm support with a graduated scale is installed near a stop point on the supporting rack, a mechanical arm with a graduated scale is installed on the mechanical arm support, the mechanical arm is connected with an atomic force microscope, and an atomic probe is connected to the lower portion of the atomic force microscope; the oil box is mounted on the reciprocating motion device through the elastic fixing device; a heating device and a temperature sensor are arranged at the bottom in the oil box, and a clamp for fixing a cylinder sleeve test piece is mounted in the oil box; the load applying mechanism is installed on the supporting rack and connected with the piston ring located above the cylinder sleeve test piece. According to the invention, through the control of the mechanical arm, the atomic force microscope can monitor the boundary film at a certain fixed position of the top dead center of the cylinder sleeve in real time, the operation is simple, and the precision is high.
Description
technical field [0001] The invention relates to the field of construction machinery, in particular to a measuring device capable of monitoring the thickness of the boundary film of a piston ring-cylinder liner friction pair in real time. Background technique [0002] The piston ring-cylinder liner friction pair is one of the important components in the internal combustion engine. The piston ring-cylinder liner friction pair is located near the dead point in the explosion pressure stage, and is in a state of boundary lubrication. Under the action of lubricating oil additives, a tribochemical reaction occurs to form a boundary film with high hardness and a solid-like film. A boundary film coats the contact surfaces, preventing direct contact between moving surfaces, thereby reducing wear. The growth and wear of the boundary film have dynamic characteristics, that is, the growth and wear are carried out simultaneously. The boundary film is difficult to measure in the actual w...
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IPC IPC(8): G01Q60/24G01Q30/00G01Q30/10
CPCG01Q60/24G01Q30/00G01Q30/10
Inventor 吕修颐马旋卢熙群葛畅王永强焦博文
Owner HARBIN ENG UNIV