Combined type dynamic seal transmission assembly

Abstract

The invention discloses a combined type dynamic seal transmission assembly. The combined type dynamic seal transmission assembly comprises a case, a transmission shaft and a shaft seal which is sleeved on the transmission shaft to seal the inside and outside of the case. The transmission shaft is arranged inside the shaft seal to form a threaded seal shaft section, the case is provided with a threaded shaft hole which is in clearance fit with the threaded seal shaft section, and the thread extension direction of the threaded seal shaft section and the threaded shaft hole is from inside to outside and is identical to the rotation direction of the transmission shaft. According to the combined type dynamic seal transmission assembly, when the transmission shaft rotates at a high speed, by means of the thrust effect of the threaded seal shaft section and the threaded shaft hole, lubricant oil inside gaps can be pumped back to the case to avoid that large amounts of lubricant oil achieves the oil sealing effects and accordingly to reduce oil seal load; meanwhile, through the centrifugal effect of an oil slinger, neighboring lubricant oil can be thrown onto the outer circumference to facilitate splash lubrication and prolong the service life of bearings; soft oil sealing materials achieve relatively good adaptability and accordingly avoid leakage of lubricant oil due to primary assembling problems. The combined type dynamic seal transmission assembly is applicable to a transmission device with the transmission shaft rotating in one direction.

Description

technical field [0001] The invention relates to a mechanical assembly, in particular to a mechanical device for transmission. Background technique [0002] The transmission device is an intermediate device that transmits the original power to the next device for output, including gearboxes, bearing boxes, etc.; it is an indispensable device for general machinery. For example, the gearbox can reduce the high speed of the engine and electric motor and transmit the output to achieve the purpose of use; of course, there are also transmission devices that realize speed increase, which are manufactured according to practical needs; the bearing box is mainly used to support the drive shaft for transmission. To maintain the stability of the device operation, of course, a certain bearing installation space will also be formed in the gearbox according to needs. [0003] The transmission device generally includes a box body and a transmission shaft, and there are other components such...

AI Technical Summary

Problems solved by technology

When the rotating parts run at high speed, it will drive the lubricating oil in the box to splash, which is beneficial to the distribution of lubricating oil and lubricating the friction pair; however, since the power is input or output through the transmission shaft, the problem of dynamic sealing of the lubricating oil in the box is that is the main problem faced by those skilled in the art

[0004] In the prior art, the lubricating oil dynamic seal of the transmission device is generally in the form of a skeleton oil seal, which can achieve a better sealing effect; however, the skeleton oil seal will wear out due to long-term friction, especially when the amount of oil thrown in the transmission device is large Under normal circumstances, a large amount of lubricating oil acts on the skeleton oil seal, and the pumping effect of the transmission shaft itself will cause leakage of lubricating oil; and the skeleton oil seal will also cause leakage of lubricating oil due to no running-in at the initial stage of assembly; moreover, in order to ensure long-term For periodic use, the material of the skeleton oil seal needs to have a certain strength, which will cause wear to the drive shaft itself and affect the performance of the drive shaft

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