Course design of two-stage reducer (design principle and application skills)

Two-stage reducer is a common device in mechanical transmission, which can reduce the speed of high-speed rotating input shaft to the speed required by output shaft. In engineering design, the reasonable selection and design of two-stage reducer is very important to improve the efficiency and reliability of mechanical transmission. This paper will introduce the design principle and application skills of two-stage reducer, and give a specific course design case.

2. Design principle of two-stage reducer

The two-stage reducer consists of two gears, one of which (input gear) is connected with the input shaft and the other gear (output gear) is connected with the output shaft. The speed ratio between the input shaft and the output shaft can be achieved by reasonably selecting the gear module, the number of teeth and the gear wheelbase.

When designing a two-stage reducer, the following factors should be considered:

1. rotational speed ratio: the rotational speed ratio between the input shaft and the output shaft is determined according to the actual demand, and is generally determined by the transmission ratio.

2. Power transmission: According to the power and speed of the input shaft, select the appropriate gear material and size to ensure that enough power can be transmitted.

3. Gear modulus and number of teeth: According to the speed ratio and the material strength of the gear, choose the appropriate gear modulus and number of teeth to ensure the strength and durability of the gear.

3. Application skills of two-stage reducer

In practical application, two-stage reducer often needs to consider the following skills:

1. Gear lubrication: Because gear transmission will generate great friction and heat, it is necessary to add lubricant between gears to reduce friction and wear.

2. Gear noise: Gear transmission will produce certain noise, especially at high speed. In order to reduce noise, vibration reduction measures can be taken, such as improving the accuracy of gears and reducing the clearance of gears.

3. Gear installation: When installing the gear, ensure the alignment of the gear axis and the meshing clearance of the gear. Otherwise, the gear transmission will be unstable and the noise will increase.

4. Course design case of secondary reducer

In the course design of secondary reducer, we will design a secondary reducer for industrial machinery. The specific steps are as follows:

1. Determine the speed ratio: determine the speed ratio between the input shaft and the output shaft according to the actual demand.

2. Select gear material and size: According to the power and speed of the input shaft, select the appropriate gear material and size.

3. Calculation of gear modulus and number of teeth: According to the speed ratio and the material strength of the gear, the appropriate gear modulus and number of teeth are calculated.

4. Design and manufacture gears: According to the calculation results, design and manufacture gears.

5. Gear lubrication and installation: When installing the gear, lubricate and ensure the correct installation of the gear.