THEORETICAL AND EXPERIMENTAL INVESTIGATIONS OF COOLANT FLOW IN INLET CHANNELS OF THE BTA AND EJECTOR DRILLS

被引：4

作者：

ASTAKHOV, VP ^{[1
]}

SUBRAMANYA, PS ^{[1
]}

OSMAN, MOM ^{[1
]}

机构：

[1] CONCORDIA UNIV,DEPT MECH ENGN,MONTREAL,PQ H3G 1M8,CANADA

来源：

PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART B-JOURNAL OF ENGINEERING MANUFACTURE | 1995年 / 209卷 / 03期

关键词：

COOLANT FLOW; BTA AND EJECTOR DRILLS; MACROVORTICES; ANNULAR CHANNELS;

D O I：

10.1243/PIME_PROC_1995_209_075_02

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The coolant flow through inlet annular channels in BTA and ejector drills is investigated. The study was conducted in order to understand the influence of the channel's parameters (the channel's clearance variation along its length and eccentricity) on the coolant pressure distribution and hydraulic resistance. A new design of the ejector drill with the eccentrical location on the inner tube is proposed. A study is made of the stability in the coolant flow in the inlet annular channels. The appearance of instability is explained by the presence of Taylor macrovortices in these channels under certain combinations of boring bar rotating velocity and axial flow velocity. In order to define the unstable regimes (the critical Reynolds numbers), the mathematical model for non-isothermal flow through the annular channel is solved The heat transfer from the swarf to the incoming coolant is investigated under different flow conditions.

引用

页码：211 / 220

页数：10

共 9 条

[1]

Astakhov V.P., Fundamental evaluation of machine-tool cooling system for deep-hole drilling (in Russian), Metallorezushie stanky, Kiev, 12, (1984)

[2]

Astakhov V.P., Scorupco A.M., Investigations of the chip-removal system in deep-hole drilling (in Russian), Metallorezushie stanky, Kiev, 10, (1982)

[3]

Taylor G., Fluid friction between rotating cylinders, Proc. R. Soc. Lond, A57, (1963)

[4]

Coney Y., Simmers D., A study of fully developed, laminar axial flow and Taylor vortex flow by means of shear stress measurements, J. Mech. Engng Sci, 21, 1, (1979)

[5]

Astakhov V.P., Modelling of therm-hydraulic processes in the technological systems of deep-hole machining (in Russian), Metallorezushie stanky, Kiev, 18, (1990)

[6]

Gnatuk A.P., Astakhov V.P., Chegodar A.A., Investigation of the change of the energy parameters of the coolant in the hydraulic system of the deep-hole drills (in Russian), Izvestia Vuzov. Mashinistroenie, Moscow, 12, (1989)

[7]

Grosse G., Technical guide to the thermal processes, (1986)

[8]

Astakhov V.P., Ajrikjan A.L., Scorupco A.M., Method of the experimental investigations of the hydraulic system of the ejector drills (in Russian), (1983)

[9]

Astakhov V.P., Ajrikjan A.L., Experimental setup for investigations of the hydraulic system of the ejector drills (in Russian), (1983)

← 1 →