TWM452251U - Spindle leakage prevention device for bearing - Google Patents

Description

Bearing shaft leakage preventing device

A shaft center leakage preventing device which can be widely applied to a fluid (liquid) body dynamic pressure bearing and a general oil bearing.

It is known that the related fluid (liquid) dynamic pressure bearing and the general oil-impregnated bearing structure are placed in the bearing housing. The inner wall surface of the shaft hole of the dynamic pressure bearing is provided with a guide groove for generating dynamic pressure effect, and the general oil bearing The inner wall surface of the shaft hole is a smooth wall surface and an axial center, and is matched with the filling flow (liquid) body and the sealing of the pull-proof buckle and the leakage preventing pressure plate to form a fluid (liquid) body dynamic pressure bearing or an oil bearing structure.

However, in the known technical creation structure, in addition to achieving the main bearing effect, the problem of outward leakage of the internal flow (liquid) body which occurs after a period of use is delayed, so that the solution is delayed. As for the flow (liquid) body dynamic pressure bearing after a period of use, often due to the leakage of the internal flow (liquid) body, the benefit is reduced or even the fault is scrapped, resulting in limited industrial use value of life and use efficiency.

However, the reason for the leakage of the internal fluid (liquid) body is still caused by the technical structure of the closed bearing housing. The main reason is that there is a slight gap between the components of the static bearing housing and the rotating shaft. In order to prevent the smooth rotation of the shaft and the high-speed rotation of the shaft at the high speed, the gas may be generated inside the bearing housing. Because of this, the gap between the leakage preventing plate and the axial center, which is mainly used to block the leakage of the internal fluid (liquid) body, becomes a future flow (liquid) body leakage path. That is, when the shaft rotates, the flow (liquid) filled inside the bearing housing will follow the axial appearance to form a film-like upward climbing, and after a period of time, the upward climbing flow (liquid) The body film leaks outward through the gap between the leakage preventing plate and the shaft center.

Of course, in the related known creative technical documents, such as: Announcement No. M425457 "Cooling Fan Bearing Gland Structure", Announcement No. M422099 "Fixed Fan Bearing Gland Structure", Announcement No. M367518 "With Negative Pressure Adsorption Type "Motor of bearing", Announcement No. M321482 "Reducing the structure of leakage of lubricating medium in fluid dynamic pressure bearing", Announcement No. M312118 "Structure of cooling fan and dynamic pressure bearing", Announcement No. I269843 "Hydraulic dynamic bearing motor and adoption "Fan of the motor", Announcement No. M291478 "Hydraulic dynamic pressure bearing", Announcement No. M277826 "Fan with fluid dynamic bearing", Announcement No. M270282 "Hydraulic dynamic bearing device", Announcement No. M267358 "Liquid increase "Pressure bearing", Announcement No. M259866 "Structural improvement of dynamic pressure bearing", Announcement No. M259867 "Dynamic pressure bearing device", Announcement No. 580072 "Dynamic fluid bearing module", Announcement No. 521127 "Dynamic pressure Fluid bearing device", Announcement No. 521800 "Dynamic bearing improvement" and Announcement No. 470825 "dynamic pressure type fluid bearing device" and the like. There is also a concave ring which is arranged by the shaft to be looped and a rubber ring which is integrally connected with the shaft center to achieve a blocking effect, but the flow (liquid) film which forms a film-like upward climbing along the outer surface of the shaft is still over the one body. The interlocking rubber ring is leaked outward by the gap between the leakage preventing plate and the shaft core.

In addition, the solution of oil-impregnated bearings with lower precision requirements is to increase the oil storage space or to extend the service life by means of external filling, but this method and means still cannot effectively solve the leakage prevention plate and the shaft. The problem of leakage leakage between the hearts.

The creation of this case can be widely applied to the "shaft bearing leakage device" of the fluid (liquid) dynamic pressure bearing and the general oil bearing, and its main purpose is to effectively block the internal flow (liquid) of the bearing in the future. The body climbs along the axis and the oil film climbs outwards, causing the loss of the filling fluid (liquid) in the bearing.

The utility model is characterized in that: the bearing seat comprises a bearing placed inside the bearing seat, an axial center which is arranged in the center of the bearing and protrudes from the outside of the bearing seat at one end, and is disposed above the bearing and is positioned to be buckled on the concave ring of the shaft center. a leakage preventing plate disposed above the pull-proof buckle to press and close the bearing seat, and at least one leak-proof ring located at an appropriate position on the inner core of the bearing housing, by means of the at least one leak-proof inner ring The surface is in contact with the outer wall of the shaft without contact, so as to effectively block the rotation of the dynamic pressure bearing and the general oil-impregnated bearing shaft, and the filling fluid (liquid) in the bearing climbs outward along the axis to cause the oil film to climb outward. The problem of the loss of fluid (liquid) in the bearing is to ensure the longer use efficiency and longevity of the bearing.

Please refer to the attached figure 1 in the figure, which is an example of the "shaft bearing leakage device" which can be widely applied to fluid (liquid) dynamic pressure bearings and general oil-impregnated bearings. The utility model is characterized in that at least one leakage preventing ring is arranged at an appropriate position on the inner core of the bearing housing, and the inner annular surface of the at least one leakage preventing ring is in micro contact with the outer wall of the shaft core without being interlocked. The above embodiments are only for the purpose of fully illustrating the preferred embodiment of the present invention, and the scope of protection of the present invention is not limited thereto. Equivalent substitutions or transformations made by those skilled in the art based on the creation of the present technology are all within the scope of protection of the present invention.

As shown in FIG. 1 , the bearing housing 1 includes a bearing 2 disposed inside the bearing housing 1 , a shaft center 3 which is placed in the center of the bearing 2 and protrudes outside the bearing housing 1 at one end, and is disposed above the bearing 2 and A pull-proof buckle 4 that is fastened to the concave ring 31 of the shaft 3, a leakage preventing plate 5 disposed above the pull-proof buckle 4 to press and close the bearing housing 1, and at least one axial center 3 located inside the bearing housing 1 A leak-proof loop 6 on the appropriate position.

As shown in FIG. 1 and FIG. 2, the at least one leakage preventing ring 6 (illustrated by taking a leakage preventing ring in the figure as an example) is located at an appropriate position on the axial center 3 of the inner portion 6 of the bearing housing 1, in this case. In the embodiment, the setting of the leakage preventing pressure plate 5 is described.

That is, as in the embodiment shown in FIG. 3 and FIG. 4, at least one ring of the annular ring groove 51 for receiving the leakage preventing ring 6 is provided in the inner wall of the leakage preventing pressure plate 5, and the lateral groove of the concave ring groove 51 is The longitudinal inner diameter is larger than the lateral and longitudinal outer diameters of the leakage ring 6 , and the leakage ring 6 can be made of a material such as elastic silicone, and the inner ring surface of the leakage ring 6 and the outer wall of the shaft 3 Micro contact without linkage.

In the assembly of the embodiment, the bearing 2 and the shaft center 3 are placed in the bearing housing 1 and filled with a flow (liquid) body, and the anti-pulling buckle 4 is snapped into the concave ring 31 preset on the shaft center. The leakage preventing plate 5 which is pressed and leakproofed above the buckle 4 is fixed to the closed bearing housing 1, and the leakage ring groove 6 is placed in the concave ring groove 51 of the leakage preventing pressure plate 5.

By means of the creation, the arrangement of the inner ring surface of the ring 6 and the outer wall of the shaft core is not linked, and the arrangement can effectively generate the axial flow rotation of the fluid-tight bearing and the general oil-impregnated bearing, and the filling flow in the bearing. The (liquid) body climbs along the axis of the oil film and causes the problem of the loss of the filling fluid (liquid) in the bearing in the future, which can effectively ensure the longer use efficiency and life of the bearing. Therefore, the case does have the progress of the patent creation requirements. Sex, novelty and industrial use.

1‧‧‧ bearing housing

2‧‧‧ bearing

3‧‧‧Axis

31‧‧‧ concave ring

4‧‧‧Anti-pull buckle

5‧‧‧ leakproof plate

51‧‧‧ concave ring groove

6‧‧‧Leakage ring

Fig. 1 is a cross-sectional view showing an embodiment of the present invention.

Figure 2: Schematic diagram of the creation of the axis and the leak-proof ring.

Fig. 3 is a perspective view of an embodiment of the present leakage preventing pressure plate.

Figure 4: Section 4-4 of Figure 3.

1‧‧‧ bearing housing

2‧‧‧ bearing

3‧‧‧Axis

31‧‧‧ concave ring

4‧‧‧Anti-pull buckle

5‧‧‧ leakproof plate

51‧‧‧ concave ring groove

6‧‧‧Leakage ring

Claims (4)

A shaft leakage preventing device for a bearing, comprising: a bearing disposed inside the bearing seat inside the bearing seat, an axial center stringed at a center of the bearing and protruding at an end of the bearing seat, disposed above the bearing and positioned to be buckled on the shaft a pull-out buckle of the concave ring, a leakage preventing plate disposed above the pull-out buckle to press and close the bearing seat, and at least one leak-proof ring located at an appropriate position on the inner shaft of the bearing housing; wherein: At least one leakage ring is located on the inner core of the bearing housing, and the inner annular surface of the leakage ring is in micro contact with the outer wall of the shaft without being interlocked. According to the shaft core leakage preventing device of the bearing mentioned in the first paragraph of the patent application, the bearing can be a dynamic pressure bearing or an oil bearing. A shaft leakage preventing device for a bearing, comprising: a bearing disposed inside the bearing seat inside the bearing seat, an axial center stringed at a center of the bearing and protruding at an end of the bearing seat, disposed above the bearing and positioned to be buckled on the shaft a pull-out buckle of the concave ring, a leakage preventing plate disposed above the pull-out buckle to press and close the bearing seat, and at least one leak-proof ring located at an appropriate position on the inner shaft of the bearing housing; wherein: The inner ring wall of the leakage preventing plate is provided with at least one ring groove for receiving the leakage ring, and the lateral and longitudinal inner diameters of the concave ring groove are larger than the lateral and longitudinal outer diameters of the leakage ring, and the leakage ring The utility model is disposed in the concave ring groove of the inner ring wall of the leakage preventing pressure plate, and the inner annular surface of the leakage preventing ring is in micro contact with the outer wall of the shaft core without being interlocked. According to the axial leakage preventing device of the bearing described in the third paragraph of the patent application scope, the bearing can be a dynamic pressure bearing or an oil bearing.