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Hydrostatic bearing oil film thickness control system

A technology of oil film thickness and hydrostatic bearings, which is applied in pump control, manufacturing tools, large fixed members, etc., can solve the problems of unstable oil film thickness of hydrostatic bearings, affecting machining accuracy and efficiency, and uncontrollable oil film thickness, etc., to achieve Effects of real-time effective observation, improved modularity and versatility, and improved machining accuracy

Inactive Publication Date: 2013-10-09
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] The invention aims to solve the problem that the oil film thickness of the traditional hydrostatic bearing is uncontrollable, and when the load or working condition of the machine tool is disturbed or changed by human factors, the oil film thickness of the hydrostatic bearing is unstable, which affects the processing accuracy and processing efficiency. , the invention provides a hydrostatic bearing oil film thickness control system

Method used

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  • Hydrostatic bearing oil film thickness control system

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specific Embodiment approach 1

[0009] Specific implementation mode one: see figure 1 Describe the present embodiment, the hydrostatic bearing oil film thickness control system described in the present embodiment, it comprises DSP signal acquisition and processing controller 1, machine tool numerical control system 2, oil supply system, hydrostatic bearing 6 and eddy current sensor 7; The oil supply system described above includes a servo variable pump 5 and a speed-regulating motor unit, and the speed-regulating motor unit includes an AC motor 4 and a frequency converter 3; connected to the signal input end, the signal output end of the frequency converter 3 is connected to the control signal input end of the AC motor 4, the AC motor 4 is used to drive the servo variable pump 5 to work, and the discharge of the servo variable pump 5 The volume control signal input end is connected to the displacement control signal output end of the machine tool numerical control system 2, the oil output by the servo variab...

specific Embodiment approach 2

[0010] Specific implementation mode two: see figure 1 and 2 This embodiment is described. The difference between this embodiment and the hydrostatic bearing oil film thickness control system described in Embodiment 1 is that the DSP signal acquisition and processing controller 1 includes an anti-aliasing filter 8 and a differential amplifier 9 , A / D converter 10, digital filtering algorithm module 11, D / A converter 12, comparator 13 and control module 14; The signal input end of described anti-aliasing filter 8 and the oil film thickness of eddy current sensor 7 The signal output terminal is connected, the signal input terminal of the described anti-aliasing filter 8 is the actual oil film thickness signal input terminal of the DSP signal acquisition and processing controller 1, the signal output terminal of the described anti-aliasing filter 8 is connected to the differential The signal input end of amplifying device 9 is connected, and the signal output end of described dif...

specific Embodiment approach 3

[0014] Specific implementation mode three: see figure 1 and 2 This embodiment is described. The difference between this embodiment and the hydrostatic bearing oil film thickness control system described in Embodiment 1 or Embodiment 2 is that the DSP signal acquisition and processing controller 1 is realized by chip TMS320F28335.

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Abstract

The invention relates to a hydrostatic pressure supporting technology and a revolving speed volume composite regulation technology, in particular to a hydrostatic bearing oil film thickness control system for solving the problems that the thickness of an oil film of a traditional hydrostatic bearing is uncontrollable, and when load or an operating condition of a machine tool is disturbed or influenced by human factors and changes occur, the thickness of the oil film of the hydrostatic bearing is unstable, and machining precision and machining efficiency are influenced. Actual oil film thickness signals are processed through a DSP signal acquisition and processing controller, then the deviation is solved through received given oil film thickness signals, finally control signals are outputted to a machine tool numerical control system, and revolving speed control signals and discharge capacity control signals outputted by the machine tool numerical control system are respectively transmitted to a frequency converter and a servo variable pump; high efficiency fast response control of flow output of an oil supply system is achieved through double regulation of the revolving speed and the discharge capacity, and the purpose that the thickness of the oil film of the hydrostatic bearing is controlled is achieved at last. The hydrostatic bearing oil film thickness control system is applied to a vertical lathe of the hydrostatic bearing.

Description

technical field [0001] The invention relates to a liquid static pressure support technology and a rotational speed volume compound adjustment technology, in particular to a control system for the oil film thickness of a static pressure bearing. Background technique [0002] The hydrostatic bearing serves as the axial support for the rotation of the workbench. The oil supply system forces the hydraulic oil into the oil chamber between the workbench and the base. The liquid has bearing capacity, which floats the workbench and forms an oil film between the workbench and the base. When the thickness is too large, the oil film of the hydrostatic bearing has low stiffness, poor stability, limited machining accuracy and high-load operation of the oil supply system, large energy consumption and power loss, and short working life; when the oil film thickness is too thin, the workbench is prone to dryness. Rubbing, risk of grinding. For traditional hydrostatic bearings, the thicknes...

Claims

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Application Information

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IPC IPC(8): B23Q11/00B23Q1/38F04B49/06
Inventor 邵俊鹏董翔孙桂涛魏荣吴迪
Owner HARBIN UNIV OF SCI & TECH
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