Melt gear pump can be divided into internal and external meshing gear pump according to the different meshing mode. According to its own advantages and disadvantages, Butt Melt gear pump manufacturer elaborates as follows: external meshing melt gear pump is characterized by good stability, strong adaptability to the environment, simple structure and convenient daily maintenance. Melt gear pumps with external meshing are often prone to large leakage, large bearing wear, large noise, pulsating flow and other shortcomings, and the radial hydraulic pressure is often unable to achieve balance. Compared with the external meshing gear pump, the internal meshing gear pump is characterized by rotating in one direction, so its loss is often smaller and the relative speed is reduced, which is equivalent to increasing its service life; the fluctuating flow and noise of the internal meshing gear pump are also smaller than that of the external meshing gear pump, so in general, the internal meshing gear pump can be used. It rotates fast, so it has high volume efficiency.
If the melt gear pump is divided into cycloid gear pump and involute gear pump according to the different curve of tooth profile, we can divide the melt gear pump into cycloid gear pump and involute gear pump. The internal meshing gear pump uses not only the involute, but also the cycloid and arc tooth profile, but the external meshing gear pump often uses the involute.