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Hydraulic accumulator pre-charge pressure detection

A hydraulic accumulator, pressure technology, applied in the direction of actuator accumulator, fluid pressure actuation system testing, fluid pressure actuation device, etc., can solve problems such as difficulty in accessing and connecting barometers

Active Publication Date: 2016-05-11
CATERPILLAR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the accumulator can be placed on the machine making it difficult to access and couple the barometer

Method used

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  • Hydraulic accumulator pre-charge pressure detection
  • Hydraulic accumulator pre-charge pressure detection
  • Hydraulic accumulator pre-charge pressure detection

Examples

Experimental program
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Embodiment Construction

[0014] Figure 1-Figure 2 An example system 100 including a hydraulic accumulator 102 , a pressure sensor 104 , a fluid source 106 and a data processor 108 is shown, according to an embodiment of the invention. System 100 may be implemented in any machine, such as excavators, wheel loaders, tractors, and other machines. The hydraulic accumulator 102 may be a piston accumulator or a bladder accumulator. One or more valves (not shown) may be associated with system 100 to selectively control accumulator charging and discharging. For example, one or more valves may be opened to charge and / or discharge the accumulator, and conversely, one or more valves (the same or different) may be closed to charge and / or discharge the accumulator.

[0015] Such as Figure 3-Figure 4 As shown, the hydraulic accumulator 102 may include a first fluid chamber 302, such as a working fluid chamber or an oil chamber, a second fluid chamber 304, such as a compressible fluid or gas chamber, and an Di...

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Abstract

A system (100) including a hydraulic accumulator (102), a pressure sensor (104), a fluid source (106) and a data processor (108) to detect a pre- charge pressure is provided. The hydraulic accumulator (102) includes first and second chambers (302, 304) and a separator (306) therebetween. The hydraulic accumulator (102) has an associated pre-charge pressure. The pressure sensor (104) coupled to the first chamber (302). The data processor (108) is configured to receive pressure readings from the pressure sensor (104). The data processor (108) is configured to determine a first and second rate of pressure changes, and a transition pressure between the first and second rates. The approximate pre- charge pressure is determined based on the transition pressure.

Description

technical field [0001] The present invention relates to hydraulic accumulators and, more particularly, to determining the pre-charge pressure of hydraulic accumulators. Background technique [0002] Hydraulic accumulators require periodic checking of their pre-charge pressure after installation in a hydraulic system to ensure the accumulator is operating healthy. A common solution for detecting the health of the accumulator involves connecting an air gauge and / or module kit to the air valve of the hydraulic accumulator when the machine is stopped and the fluid in the hydraulic accumulator is not pressurized. The barometer provides a reading of the pre-charge pressure. Based on this reading, the hydraulic accumulator is either recharged or overhauled or replaced. Therefore, the usual solution requires a physical connection of the hydraulic accumulator to the pressure gauge. However, the accumulator can be placed on the machine making it difficult to access and couple the b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F15B1/10F15B1/04
CPCF15B1/08F15B19/005F15B2201/31F15B2201/505F15B2201/51
Inventor D·陈马鹏飞尚同林B·J·希尔曼
Owner CATERPILLAR INC