Apparatus for measuring plunger sub-oil film viscous friction

A measuring device and friction force technology, applied in the direction of measuring device, measuring fluid pressure, measuring fluid pressure through electromagnetic elements, etc., can solve the problem of failure to consider the mutual disturbance of the plunger distribution structure, etc., and achieve ingenious design and application, reliable performance. , the effect of volume reduction

Inactive Publication Date: 2009-04-22
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the experimental device still has certain limitations due to failure to cons

Method used

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  • Apparatus for measuring plunger sub-oil film viscous friction
  • Apparatus for measuring plunger sub-oil film viscous friction
  • Apparatus for measuring plunger sub-oil film viscous friction

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Experimental program
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Embodiment Construction

[0022] The present invention will be further described below in conjunction with drawings and embodiments.

[0023] Such as figure 1 , figure 2 , image 3 As shown, the present invention includes a cylinder body 1, a sensing rod 2, a connecting rod 3, a fastening screw 4, a sensor cable 5, a friction sensor 6, a fixing nut 7, a plunger bushing 8, and a spring collar 9 , guide rod 10 and one-way valve 11; in the plunger chamber of cylinder 1, the guide rod 10 and plunger bushing 8 are connected together by spring collar 9 to form a floating bush supported by static pressure Assemblies, the guide rod 10 in the floating bush assembly is interference fit with the rear end of the plunger cavity, the plunger bushing 8 and the spring collar 9 can float relative to the guide rod 10, and the spring collar 9 and the guide rod 10 bosses are used to limit the floating maximum displacement mutually. Therefore, the floating plunger bushing 8 can be driven to float by the axial and radi...

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Abstract

The invention discloses a device for measuring viscous friction force of an oil film of a plunger pair in a plunger pump. The device comprises a cylinder body, an induction feeler lever, a connecting rod, a fastening screw, a sensor cable, a friction force sensor, a fixing nut, a plunger bushing, a spring closing ring, a flow guide rod and a check valve component. The flow guide rod and the plunger bushing are connected together by the spring closing ring to form a floating bushing assembly supported by static pressure, the viscous force in the 3D direction of the oil film is induced by the induction feller lever and is transmitted to the friction force sensor by the connecting rod with higher rigidity, and the cable of the friction force sensor is led to the central position of the cylinder body by a neck groove on the cylinder body, and the cable is led out by a main shaft of the plunger pump. The structure of the device reasonably uses a void part between plunger chambers on the cylinder body, which causes the friction force sensor with larger volume to have sufficient mounting space and ensures reliable and stable structure and reliable performance; and the ingenious design and the application of the integral mechanical structure realizes compact structure and reduced volume.

Description

technical field [0001] The invention relates to an oil film viscous friction measuring device for a key friction pair of an axial plunger pump, in particular to a plunger pair oil film viscous friction measuring device. Background technique [0002] The axial piston pump / motor is one of the most important power components in the hydraulic field, and its plunger pair is the working area where the reciprocating motion of the plunger generates oil suction and pressure. The friction and lubrication performance of the oil film of the plunger pair directly determines the performance of the plunger pump. However, due to the narrow space of the cylinder where the plunger cavity is located, and the oil film viscous friction of the plunger pair exists in both axial and circumferential directions of the plunger, the viscous friction of the oil film requires a special structure to sense forces in all directions. The traditional experimental methods mainly include the following methods:...

Claims

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Application Information

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IPC IPC(8): G01L9/00
Inventor 张斌徐兵马吉恩杨华勇
Owner ZHEJIANG UNIV
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