Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A test method for oil film lubrication performance of static pressure turntable running at constant linear velocity

A technology of constant linear velocity and static pressure turntable, which is applied in the direction of lubricating parts, engine lubrication, measuring devices, etc., which can solve problems such as the influence of running accuracy and oil chamber pressure fluctuations, and achieve the effect of improving surface quality

Active Publication Date: 2021-08-24
NANJING INST OF TECH
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this mode, the spindle speed changes continuously with the diameter of the workpiece, and the oil film in the gap of the hydrostatic bearing is always in the process of changing from one stable working state to another stable working state, which causes the pressure in the oil chamber to fluctuate, and then have an impact on running accuracy

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A test method for oil film lubrication performance of static pressure turntable running at constant linear velocity
  • A test method for oil film lubrication performance of static pressure turntable running at constant linear velocity
  • A test method for oil film lubrication performance of static pressure turntable running at constant linear velocity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0042] Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0043] Such as figure 1 As shown, the present invention is a method for detecting the oil film lubrication performance of a static pressure turntable operating at a constant linear velocity. By theoretically analyzing the lubrication characteristics of a double rectangular cavity hydrostatic thrust bearing turntable operating at a constant linear velocity, the mechanism of the oil film flow in the gap is analyzed. Deduce the unsteady gap flow velocity equation and the instantaneous flow equation, including the following steps:

[0044] Step A: Analyze the operating characteristics of the static pressure turntable at constant linear velocity. The velocity field of the gap flow with acceleration boundary is composed of three parts: one is the flow caused by the pressure difference between the inlet and outlet, and the velocity field is distribute...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for detecting the lubricating performance of an oil film running at a constant linear velocity on a static pressure turntable, comprising the following steps: analyzing the characteristics of the constant linear velocity operation of the static pressure turntable; according to the periodic distribution characteristics of the oil pad of the static pressure turntable, taking a single rectangular oil chamber for analysis, Divide the rectangular oil chamber into A area and B area, set the direction of the constant linear velocity of the static pressure turntable and set the coordinate system according to the basic parameters of the oil pad; calculate and analyze the rectangular oil according to the direction of the constant linear velocity of the static pressure turntable and the basic parameters of the oil pad lubricating oil flow rate in area A and B of the cavity; calculate and analyze the lubricating oil flow rate in area A and B of the rectangular oil chamber according to the constant linear velocity direction of the static pressure turntable and the basic parameters of the oil pad; The steady-state flow reference value is compared, and if it is lower than the reference value, it will be replaced in time. The invention has important significance for effectively predicting the oil film lubrication performance of the static pressure turntable running at constant linear speed and improving the surface quality of the processed workpiece on the static pressure turntable.

Description

technical field [0001] The invention belongs to the technical field of oil film lubrication performance detection, and in particular relates to a method for detection of oil film lubrication performance of a static pressure turntable running at a constant linear speed. Background technique [0002] The constant linear speed cutting function is an essential function of high-end CNC lathes. Using this function can improve the processing efficiency and ensure the consistency of the surface quality of the processed surface, which has broad application prospects. In this mode, the spindle speed changes continuously with the diameter of the workpiece, and the oil film in the gap of the hydrostatic bearing is always in the process of changing from one stable working state to another stable working state, which causes the pressure in the oil chamber to fluctuate, and then affect the running accuracy. Based on this, the present invention theoretically analyzes the lubrication charac...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): F16N29/00G01N11/00G06F30/20G06F111/10G06F113/08
CPCF16N29/00F16N2250/40G01N11/00
Inventor 张艳芹罗义李晓晖
Owner NANJING INST OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products