CN-224201117-U - Combined oil return sealing structure

CN224201117UCN 224201117 UCN224201117 UCN 224201117UCN-224201117-U

Abstract

The utility model discloses a combined oil return sealing structure which comprises a main shaft, an oil slinger, an end cover and a labyrinth oil seal, wherein the main shaft is divided into a primary shaft and a secondary shaft from left to right, the radius of the primary shaft is smaller than that of the secondary shaft, the left end of the primary shaft penetrates through a transmission device, an annular groove is formed in the right end of the primary shaft, the oil slinger is assembled on the primary shaft, the left side of the oil slinger is attached to the right side of the transmission device, the right side of the oil slinger is attached to the left side of the secondary shaft, the labyrinth oil seal is installed on the secondary shaft in a clearance mode, a trapezoid annular groove and an annular boss are arranged on the outer side of the labyrinth oil seal, the annular boss is in clearance fit with the groove at the corresponding position on the end cover, a plurality of annular grooves are formed in an inner hole of the labyrinth oil seal, a plurality of oil holes communicated with the annular grooves are formed in the labyrinth oil seal, and axial holes communicated with the oil holes are formed in the labyrinth oil seal. The utility model optimizes the sealing structure and the lubricating oil return path, improves the oil return efficiency, reduces the risks of retention and oil degradation, and simultaneously effectively reduces the risk of oil leakage.

Inventors

HAN YU
WANG ZHENSHAN
TANG YIBO
YANG ZEKAI
LI HONGMENG
YANG HAOCHENG
DONG PENG

Assignees

陕西法士特汽车传动集团有限责任公司

Dates

Publication Date: 20260505
Application Date: 20250527

Claims (5)

1. The combined oil return sealing structure comprises a main shaft (1) and an oil slinger (2) and is characterized by further comprising an end cover (3) and a labyrinth oil seal (4), wherein the main shaft (1) is divided into a primary shaft and a secondary shaft from left to right, the radius of the primary shaft is smaller than that of the secondary shaft, the left end of the primary shaft is used for penetrating through a transmission device, and the right end of the primary shaft is provided with an annular groove; The labyrinth type oil seal (4) is installed on the secondary shaft in a clearance mode, a trapezoid annular groove (4-1) and an annular boss (4-2) are arranged on the outer side of the labyrinth type oil seal (4), the annular boss (4-2) is in clearance fit with a groove at a corresponding position on the end cover (3), a plurality of annular grooves are formed in an inner hole of the labyrinth type oil seal (4), a plurality of oil holes communicated with the annular grooves are further formed in the labyrinth type oil seal (4), and an axial hole (4-18) communicated with the plurality of oil holes together is formed.
2. The combined oil return sealing structure according to claim 1, characterized in that the left shaft diameter of the oil slinger (2) is lower than the right shaft diameter.
3. The combined oil return sealing structure according to claim 1, wherein an open ring groove (4-3), a concave ring groove (4-4), a first V-shaped ring groove (4-5), a second V-shaped ring groove (4-6), a first rectangular ring groove (4-7), a third V-shaped ring groove (4-8), a fourth V-shaped ring groove (4-9), a second rectangular ring groove (4-10), a fifth V-shaped ring groove (4-11), a sixth V-shaped ring groove (4-12) and a seventh V-shaped ring groove (4-13) are sequentially arranged in an inner hole of the labyrinth oil seal (4) from left to right, and the open ring groove (4-3) is assembled with a right shaft of the oil slinger (2) in a clearance mode.
4. A combined oil return sealing structure according to claim 3, wherein the two top ends of the concave annular groove (4-4) of the labyrinth oil seal (4), the first rectangular annular groove (4-7) and the second rectangular annular groove (4-10) are respectively provided with a radial first oil hole (4-14), a radial second oil hole (4-15), a radial third oil hole (4-16) and a radial fourth oil hole (4-17), the thickness and the depth of the first rectangular annular groove (4-7) are larger than those of the second rectangular annular groove (4-10), the size of the second rectangular annular groove (4-10) is the same as that of the two ends of the concave annular groove (4-4), the first oil hole (4-14), the second oil hole (4-15) and the radial fourth oil hole (4-17) are equal in diameter and slightly smaller than those of the third oil hole (4-16), the bottoms of the first oil hole (4-14), the second oil hole (4-15), the third oil hole (4-16) and the fourth oil hole (4-17) are jointly provided with an axial hole (4-18) and are axially connected with the axial annular groove (4-10) and axially extend through the axial annular groove (4-18) to the axial outer side of the labyrinth oil seal (4-18).
5. The combined oil return sealing structure according to claim 1, wherein the left side surface of the labyrinth oil seal (4) is an inclined surface, the right side surface of the boss of the oil slinger (2) is also an inclined surface, the inclination of the two inclined surfaces are the same, and a cavity is formed between the two inclined surfaces.

Description

Combined oil return sealing structure Technical Field The utility model belongs to the technical field of sealing elements, and relates to a combined oil return sealing structure. Background Reliability and sealing performance of the lubrication system are key factors for ensuring efficient operation of equipment, prolonging service life and ensuring safety. Along with the development of industrial equipment to high rotation speed and high power density, how to effectively prevent lubricating oil from leaking under dynamic working conditions and simultaneously avoid invasion of external pollutants becomes an important challenge for ensuring normal operation of machinery. The traditional sealing scheme has a plurality of defects in practical application, such as easy accumulation of lubricating oil at the labyrinth seal, low oil return efficiency caused by turbulence disturbance, instantaneous leakage caused by oil film rupture, larger friction loss, high maintenance cost and the like. These problems not only affect the operating efficiency of the equipment, but may also lead to frequent maintenance and higher operating costs. Disclosure of Invention The present utility model is directed to a combined oil return sealing structure, which solves at least one of the problems of the prior art. According to the utility model, by optimizing the sealing structure and the lubricating oil return path, the oil return efficiency is improved, the lubricating oil is ensured to quickly return, and the risks of retention and oil degradation are reduced. Meanwhile, the risk of oil leakage is effectively reduced, pollutants are prevented from entering, and environmental pollution is avoided. In order to achieve the above purpose, the utility model adopts the following technical scheme: The combined oil return sealing structure comprises a main shaft, an oil slinger, an end cover and a labyrinth oil seal, wherein the main shaft is divided into a primary shaft and a secondary shaft from left to right, the radius of the primary shaft is smaller than that of the secondary shaft, the left end of the primary shaft is used for penetrating through a transmission device, and the right end of the primary shaft is provided with an annular groove; the labyrinth type oil seal is arranged on the secondary shaft in a clearance mode, a trapezoid annular groove and an annular boss are arranged on the outer side of the labyrinth type oil seal, the annular boss is in clearance fit with a groove at a corresponding position on the end cover, a plurality of annular grooves are formed in an inner hole of the labyrinth type oil seal, the opening annular groove is in clearance fit with the right shaft of the oil slinger, a plurality of oil holes communicated with the annular grooves are further formed in the labyrinth type oil seal, and an axial hole communicated with the plurality of oil holes together is formed in the labyrinth type oil seal. Further, the left shaft diameter of the oil slinger is lower than the right shaft diameter. Further, an opening ring groove, a concave ring groove, a first V-shaped ring groove, a second V-shaped ring groove, a first rectangular ring groove, a third V-shaped ring groove, a fourth V-shaped ring groove, a second rectangular ring groove, a fifth V-shaped ring groove, a sixth V-shaped ring groove and a seventh V-shaped ring groove are sequentially arranged in the inner hole of the labyrinth oil seal from left to right. Further, radial first oil holes, second oil holes, third oil holes and fourth oil holes are respectively formed in the two top ends of the concave-shaped annular groove of the labyrinth oil seal, the single sides of the first rectangular annular groove and the second rectangular annular groove, the thickness and depth of the first rectangular annular groove are larger than those of the second rectangular annular groove, the size of the second rectangular annular groove is the same as that of the two ends of the concave-shaped annular groove, the first oil holes, the second oil holes and the fourth oil holes are equal in diameter and slightly smaller than those of the third oil holes, axial holes are commonly formed in the bottoms of the first oil holes, the second oil holes, the third oil holes and the fourth oil holes and are communicated with the axial holes, the axial holes penetrate through the trapezoid annular grooves in the outer sides of the labyrinth oil seal, and the axial holes are used for oil return leftwards. Furthermore, the left side face of the labyrinth oil seal is an inclined face, the right side face of the boss of the oil slinger is also an inclined face, the inclination of the two inclined faces is the same, and a cavity is formed between the two inclined faces. Compared with the prior art, the utility model optimizes the sealing structure and the lubricating oil return path, improves the oil return efficiency, ensures the quick return of lubricating oil and reduces the risks