Bell mouth

About: Bell mouth is a research topic. Over the lifetime, 603 publications have been published within this topic receiving 1624 citations.

An investigation of bell mouthing in precision hole machining with self-piloting tools

Abstract: The bell mouth is the tapered hole entrance and it is unavoidable disadvantage of the machining with self-piloting tools. A comprehensive theoretical and experimental study of bell mounting in precision hole machining with self-piloting tools is carried out. The prime concern of the theoretical part is the mechanism of the bell mouth formation. The main factors affecting bell mouth have been revealed by analyzing mechanics of tool entrancing into the workpiece. Three working methods with self-piloting tools are considered and the recommendations made relevant to the tool and machine tool design. Experimental part of the study involved Boring and Trepanning Association self-piloting drilling on special designed deep-hole drilling machine. The main objective of this part was to obtain the quantitative relationships between the bell mouth parameters and the cutting regime. The technique of the statistical design of experiments along with a special procedure for the data acquisition and analysis provided to cover the whole range of the process parameters and to get the mathematical model accounted the parameters interaction.

Rope connecting device

Abstract: The utility model relates to a rope connecting device for connect the rope, include: anchor cup sets up a bell mouth along anchor cup's axial, reaches and the communicating first screw hole of bell mouth, in the toper latch segment, holding and bell mouth, a plurality of first recesses have been seted up to the surface of toper latch segment, enclose with the inner wall of bell mouth and establish into the holding chamber to holding share split cable forms the connector between per two adjacent first recesses, the adapter sleeve is connected with anchor cup, the adapter sleeve along the axial set up with the communicating second screw hole of bell mouth, second screw hole and butt toper latch segment are worn to establish by the screw rod. Above -mentioned rope connecting device screw rod screw in second screw hole supports tight toper latch segment, makes the toper latch segment extrude toward the direction that the bell mouth diameter is little to increase share split cable is to the frictional force of inner wall, and then the locking rope. Each part of this rope connecting device is all separately manufactured, and production cycle is short, improves production efficiency, can be based on the concrete nimble simple and convenient installation of the on -the -spot condition of using.

Centrifugal Fan With Turbulence Inducing Inlet Bell

Abstract: A centrifugal fan has an inlet bell that induces turbulence in the intake air stream so as to better distribute air across the rotating radial fan blades and thereby increase fan efficiency. The “turbulator” feature is one or more preferably arcuate surfaces integrally formed in the inlet bell to either project into or away from the intake air stream. The turbulator disrupts smooth air flow across the inside surface of the inlet bell has the effect of randomizing the air at the boundary layer to reduce separation of the air from the inlet bell as it leaves the inlet bell and enters the impeller. The air can thus follow the contour of the inlet bell more closely to make a tighter radius turn as it enters the impeller. In so doing, air is delivered across more of the fan blades so that output air flow is increased.