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Control method for tensioning force of hydraulic jack

A technology of hydraulic jack and control method, which is applied in the direction of measuring fluid pressure, force/torque/work measuring instrument, and testing of machine/structural components, etc. Low accuracy, jacks cannot be interchanged, etc.

Inactive Publication Date: 2012-01-18
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its shortcomings are as follows: 1. Since the "oil pressure-output force" uses the average value of three measurement records to make a chart or draw a curve as the basis for tensioning, the accuracy of the hydraulic jack's tension is accurate. Second, due to the calibration of the tensioning equipment system: jack, oil pump, oil gauge, and oil pipe, the "oil pressure-output force" corresponds to the jack and the oil gauge one by one, and the jack and the oil gauge cannot be interchanged ; 3. Existing tensioning equipment system: jacks, oil pumps, oil gauges, and oil pipes have no display of output force speed, peak value and jack tensioning times

Method used

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  • Control method for tensioning force of hydraulic jack
  • Control method for tensioning force of hydraulic jack
  • Control method for tensioning force of hydraulic jack

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1). Obtain the two data of "oil pressure - output force" and "oil pressure - oil indication value" at one time:

[0020] Such as figure 1 As shown, the tensioning equipment system: jacks, oil pumps, standard oil gauges, measuring oil gauges, and oil pipes are calibrated for "oil pressure-output force" and "oil pressure-oil indication value", and store the tensioning equipment system The two calibration data of "oil pressure - output force" and "oil pressure - oil indication value"; the calibration work is carried out on the press, and the oil pressure and oil indication value are recorded and stored point by point based on the active working state of the jack. Value and output force, take the average value of three measurements, and automatically make a graph that can be stored and read or draw a curve.

[0021] 2). Set and store the minimum and maximum values ​​of the output force of the jack once stretched, and the accumulated stretching times of the jack's actual st...

Embodiment 2

[0025] 1). Obtain the two data of "oil pressure - output force" and "oil pressure - oil indication value" in two successively; you can also fill in one data if one data is missing:

[0026] Such as image 3 As shown, the tensioning equipment system: jacks, oil pumps, standard oil gauges, and oil pipes are calibrated "oil pressure-output force", and the "oil pressure-output force" calibration data of the tensioning equipment system are stored; Figure 4 As shown, the tensioning equipment system: oil pump, standard oil gauge, measuring oil gauge, and oil pipe are calibrated "oil pressure - oil indication value", and the "oil pressure - oil value" of the oil pump, standard oil gauge, measuring oil gauge, and oil pipe is stored. —Oil indication value” calibration data; the calibration work of the jack is carried out on the press machine, based on the active working state of the jack, record and store the oil pressure and output force point by point, take the average value of the t...

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Abstract

The invention discloses a control method for a tensioning force of a hydraulic jack. The control method at least comprises the following steps of: carrying out calibration of oil pressure-output force and oil pressure-oil express value on tensioning equipment; setting and storing a minimum value and a maximum value of an output force generated by tensioning the jack once in the tensioning equipment as well as actually-tensioned accumulated times and the allowed tensioning maximum times of the jack; reading the minimum value and the maximum value of the output force generated by tensioning thejack once in the system, the actually-tensioned accumulated times and the allowed tensioning maximum times of the jack as well as relevant data of the oil pressure-output force and oil pressure-oil express value by the tensioning equipment system; and carrying out point-to-point control and tensioning on the output force, and displaying the magnitude and the speed of the output force, the indicating value of a peak value, the actually-tensioned accumulated times of the jack as well as the magnitude, the speed and the peak value of a stressed member, wherein the jacks can be interchanged and measuring oil gauges can be also interchanged.

Description

technical field [0001] The invention relates to a method for controlling tension force of a hydraulic jack in the field of electromechanical control. Background technique [0002] The hydraulic jack is a hydraulic pump driven by manpower or electricity, driven by a hydraulic system, and a cylinder or a piston is used as a jacking piece. The hydraulic jack has a compact structure, can lift heavy objects smoothly, has a large lifting capacity, a large stroke, and high transmission efficiency, so it is widely used. At present, in order to ensure the accuracy of the tensioning force of the hydraulic jack, it is generally used to regularly calibrate the tensioning equipment system: jacks, oil pumps, oil gauges, and oil pipes for "oil pressure-output force". The calibration work is generally carried out on the press, based on the active working state of the jack, recorded in grades, and the average value of three measurements is taken to make a chart or draw a curve as the basis ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M99/00G01L5/00G01L27/00
Inventor 陈洪陈昉健
Owner HUNAN UNIV
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