Do you know the advantages of parallel-shaft helical gear reducers?

Do you know the advantages of parallel-shaft helical gear reducers?

Parallel-shaft gear motors are not designed to use bevel gears, unlike right-angle gear motors. Instead, they employ the following types of gears: So, do you know the advantages of parallel-shaft helical gear reducers?

Do you know the advantages of parallel-shaft helical gear reducers?

1. Helical gear reducers. These gears feature teeth that are inclined relative to the axis of rotation. As a result, they can transmit greater power and higher speeds. Moreover, they represent an excellent choice for applications seeking a quiet and durable drive—particularly in comparison to spur gear reducers. This is the most common gear configuration. In spur gears, the teeth are straight and parallel to the reducer’s drive shaft; double helical gear reducers, on the other hand, are used when the rotating components themselves require substantial thrust loads.

2. The advantages of parallel-gear motors include a wide range of power and torque capabilities. Specifically, parallel-axis gear motors have a power rating of 200 kW and a rated torque of 20,000 Nm. They offer superior efficiency because they perform better at high torques and can withstand higher radial forces. Additionally, they feature low noise and vibration levels. However, their size is typically larger than that of other types of gear motors, as the arrangement of their components requires more space.

Why are helical gears used in parallel-shaft helical gear reducers?

1. Many customers, when selecting gear reducers, often mention the use of hardened-helical-gear reducers, pointing out that the drawbacks of durable spur gears stem from their vibration. Whether due to design flaws, manufacturing issues, or deformation, the profile of involute gears can change simultaneously across all tooth surfaces. This results in a periodic excitation—occurring once per tooth—and such vibrations are often quite noticeable. The resulting vibrations not only impose significant loads on the gears themselves but also generate noise. Another disadvantage is that, during the contact period, the additional compressive strength occasionally achieved when two pairs of teeth are engaged remains largely untapped, as the local stress is constrained by the three-tooth meshing configuration within the cyclical system.

2. Helical gears are used to manufacture parallel helical gear reducers. A helical gear can be regarded as a cylindrical gear composed of a set of disc-shaped meshing gears, with each disc contacting at different positions along the tooth profile, thereby compensating for deviations in each individual disc-shaped gear. Thanks to the flexibility of the gear teeth, this compensation effect is highly effective. Consequently, gear teeth with deviations within 10 mm can be averaged out, allowing deviations under load conditions to be reduced to within 1 mm. At any given time, approximately half of the engagement period (assuming an overlap ratio of about 1.5), two teeth will be engaged simultaneously, which provides additional benefits in terms of compressive strength. As a result, the stress concentration can occur at 1.5 times the tooth width rather than at just one tooth width.

3. Manufacturing and installing a large number of spur gears is both difficult and uneconomical; therefore, it is necessary to produce gears that are joined together as a single unit and whose teeth are oriented along a helical path. Unlike spur gears, helical gears generate only a small axial force. However, the advantages in terms of reduced vibration and improved resistance to compressive stress far outweigh the slight increase in radial driving force and manufacturing costs. Consequently, helical gears—not straight gears—are typically used in the manufacture of gear reducers. For example, our four major product series include: Helical Gear Reducers Series, Helical Gear Reducers Series, Helical Gear Rack Reducers Series, and Parallel-Axis Helical Gear Reducers Series. As a custom manufacturer of wheat reducers, we have consistently been dedicated to the advancement of the transmission industry, primarily supplying hardened-tooth surface helical gear reducers, precision planetary gear reducers, worm gear reducers, and various customized gear reducers.