Kneel for a single stage cylindrical gear reducer design book Urgent Urgent !! 15

The input speed of the stand-alone bevel gear reducer is high, the output speed is low, and the gear ratio is relatively high.

Single-stage cylindrical gear reducer, single-stage cylindrical gear reducer is suitable for reduction ratio 3 5. The teeth can be straight, helical or herringbone and the cabinet is usually cast in cast iron or welded from steel plates. Rolling bearings are commonly used, and East China bearings are used only when heavy load or ultra-high speed.

Two-stage cylindrical gear reducer, two-stage cylindrical gear reducer is divided into three types: split-type and coaxial type, and the applicable reduction ratio is 8 40.

Analysis of the characteristics of various reducers: single-stage bevel gear reducer, single-stage bevel gear reducer is suitable for reduction ratio 2 4. The transmission ratio should not be too large to reduce the size of the bevel gear and facilitate processing. It is only used in transmissions where two axes intersect perpendicularly.

Cone and cylindrical gear reducer, cone and cylindrical gear reducer are suitable for reduction ratios of 8 15. Bevel gears should be arranged at a high speed stage to reduce the size of the bevel gears. Bevel gears can be straight or curved.

Cylindrical gears are mostly helical teeth, which allow them to offset part of the axial force of the bevel gear.

Worm reducer, worm reducer is suitable for reduction ratio of 10 80. The structure is compact, the transmission ratio is large, but the transmission efficiency is low, and it is suitable for the occasion of small power and gap work. When the circumferential speed of the worm is V4 5m s, the worm is bottom-mounted, and the lubrication and cooling conditions are better. When V 4 5m s, the agitation loss of the oil is larger, and the worm is generally top-mounted.

Hello Difficulties in the design of the first-class cylindrical gear reducer: The difficulties are mainly analyzed in the article on the first-stage cylindrical gear reducer, and the key points and difficulties in its design are analyzed, including the design of the shaft, rolling bearings, etc. At the same time, a simple analysis was made on the selection of keys, lubricating oils, lubrication methods, sealing methods, and couplings.

The design requires this paper to start from the actual needs, in the mechanical equipment: When the belt drive and gear drive are applied at the same time, they should be arranged in the high-speed stage as much as possible, so that when the same power is transmitted, the speed is higher, the torque is smaller, and the structure is more compact. Worm drive.

It should be arranged in the high-speed stage, so that the working tooth surface has a high relative sliding speed, so as to facilitate the formation of lubricating oil film, improve efficiency and bearing capacity, prolong life, and also obtain a smaller structural size. Bevel gears are difficult to manufacture because of the high accuracy level, and their circumferential speed should be limited. The box is a very complex part in the reducer, so the parts in the box must be reasonably configured in the design, so that it can meet the spatial layout, and at the same time, it is necessary to design sufficient strength, stiffness service life, manufacturing process and economic requirements, etc., in order to achieve high practicability of the box.

The designed box needs to have sufficient working performance to meet the actual needs, and be easy to manufacture, while also controlling its weight and minimizing cost reduction. --Generally speaking, the box material can meet the needs of use, and there is no need to pursue the high performance of the material excessively, for example, the ordinary type of reducer can be made of HT15-33 gray cast iron, the reducer made of this material has good rigidity, and is easy to change the shape, easy to cut, and can be widely used in the design and production of batch boxes. The selection of the motor is one of the key points of the transmission design work, so the type of motor needs to be reasonably selected in the design, and the actual needs need to be combined, for example, the Y series three-phase AC asynchronous motor can be applied to most of the design.

And to clarify the power of the motor, the power and speed of the motor are not the same under all requirements, so we must be cautious when choosing. At the same time, the total transmission ratio should be calculated, and the transmission ratio of each level should be assigned, and the calculation of the transmission ratio is mainly carried out after the selection of the motor, and it is necessary to calculate according to the rated speed of the motor and the shaft speed of the working machine.