Động cơ Diezel cũng là một loại động cơ đốt trong kiểu piston , trong quá trình cấp nhiên liệu hòa trộn hỗn hợp và cháy được thực hiện chủ yếu trong thể tích buồng cháy động cơ

Đề tài nghiên cứu xây dựng mô hình mô mô phỏng hệ thống thử phanh ô tô kiểu con lăn quán tính , điều khiển tự động sử dụng vi điều khiển PIC 18F4450, đồng thời xây dựng chương trình tính toán lực phanh bằng ngôn ngữ Visual Basic

Về nguyên tắc , tất cả các ổ lăn đều được bôi trơn bằng dầu hoặc mỡ , riêng ổ bi chặn tự lựa lòng cầu thường chỉ bôi trơn bẳng dầu ,trừ trường hợp vòng quay rất thấp

Kết cấu trục phải ít gây tập trung ứng xuất nhất .Có hai loại trục thông dụng là trục trơn và trục bậc

Cho đến nay đã có nhiều công trình giải bài toán phân phối truyền theo những chỉ tiêu khác nhau và đề xuất các công thức thực nghiệm

Tính toán thiết kế hệ thống dẫn động cơ khí là nội dung không thể thiếu trong nhiều chương trình đào tạo kỹ sư cơ khí nhằm cung cấp các kiến thức cơ sở về kết cấu máy

Computer Aided Design (CAD) is a computer-based technology that allows a designer to draw and label the engineering details of a product or project electronically on a computer screen while relegating drawing reproduction to a printer or X-Y plotter.

Fastening, latching, clamping, and chucking devices remotely controlled latch this simple mechanism engages and disengages parallel plates carrying couplings and connectors.

This crane braking system operates when the main line switch closes. The full depression of the master-cylinder foot-pedal compresses the brake-setting spring mounted on the hydraulic releasing cylinder. After the setting spring is fully compressed, the hydraulic pressure switch closes, completing the electric circuit and energizing the magnetic check valve. The setting spring remains compressed as long as the magnetic check valve is energized because the check valve traps the fluid in the hydraulic-releasing cylinder. Upon release of the foot peal, the brake lever arm is pulled down by the brake releasing spring, thus releasing the brake shoes.

A simple cam-and-linkage arrangement (drawing) works in a team with two caliper disk brakes to provide automatic tension control for paper feeds on a web press. In the feed system controlled tension must be maintained on the paper that’s being drawn off at 1200 fpm from a roll up to 42 in. wide and 36 in. in diameter. Such rolls, when full, weigh 2000 lb.

One method of coupling shafts makes use of gears that can replace chains, pulleys, and friction drives. Its major limitation is the need for adequate center distance. However, an idler can be used for close centers, as shown. This can be a plain pinion or an internal gear.

Gears are versatile mechanical components capable of performing many different kinds of power transmission or motion control. Examples of these are • • • • Changing rotational speed. Changing rotational direction. Changing the angular orientation of rotational motion. Multiplication or division of torque or magnitude of rotation. • Converting rotational to linear motion and its reverse. • Offsetting or changing the location of rotating motion. Gear Tooth Geometry: This is determined primarily by pitch, depth, and pressure angle....

A cam is a mechanical component that is capable of transmitting motion to a follower by direct contact. The driver is called a cam, and the driven member is called the follower.

An addition to the family of retractable coil springs, initially popular for use as antennas, holds promise of solving one problem in such applications: lack of torsional and flexural rigidity when extended. A pop-up boom that locks itself into a stiffer tube has been made.

This cartridge-operated rotary actuator quickly retracts the webbing to separate a pilot forcibly from his seat as the seat is ejected in emergencies. It eliminates the tendency of both pilot and seat to tumble together after ejection, preventing the opening of the chute. Gas pressure from the ejection device fires the cartridge in the actuator to force the ball-bearing screw to move axially. The linear motion of the screw is translated into the rotary motion of a ball nut. This motion rapidly rolls up the webbing (stretching it as shown) so that the pilot is snapped out of his seat.

An ingenious intermittent mechanism with its multiple gears, gear racks, and levers provides smoothness and flexibility in converting constant rotary motion into a start-and-stop type of indexing.

Here’s a common problem; Parts arrive in either open-end or closed-end first; you need a device that will orient all the parts so they feed out facing the same way. In Fig. A. when a part comes in open-end first, it is pivoted by the swinging lever so that the open end is up. When it comes in closed-end first, the part brushes away the lever to flip over headfirst. Fig. B and C show a simpler arrangement with pin in place of lever....

The programmability of the industrial robot using computer software makes it both flexible in the way it works and versatile in the range of tasks it can accomplish. The most generally accepted definition of a robot is a reprogrammable, multifunction manipulator designed to move material, parts, tools, or specialized devices through variable programmed motions to perform a variety of tasks. Robots can be floor-standing, benchtop, or mobile.

Motion control systems today can be found in such diverse applications as materials handling equipment, machine tool centers, chemical and pharmaceutical process lines, inspection stations, robots, and injection molding machines.

Ly hợp là một cụn hệ thống truyền lực nằm giữa động cơ và hộp số chính