Rotary oil seal of dual hydraulic system

Abstract

This invention provides a rotary oil seal for a dual hydraulic system, comprising: a connector body having a first oil passage and an outer peripheral surface; the connector body further comprising a second oil passage, including: a first radial through-hole penetrating the outer peripheral surface; a first inner ring channel communicating with the first radial through-hole, the first inner ring channel being located around the outer periphery of the first oil passage; a second radial through-hole communicating with the first inner ring channel; a second inner ring channel communicating with the second radial through-hole, the first inner ring channel being closer to the first oil passage than the second inner ring channel; a third radial through-hole communicating with the second inner ring channel; and an axial oil hole communicating with the third radial through-hole.

Claims

1. A rotary oil seal for a dual hydraulic system, for locking onto the end of a spindle, wherein the rotary oil seal for the dual hydraulic system comprises: A connector body having a first oil passage, the connector body having an outer peripheral surface; The connector body further comprises a second oil passage, including: a first radial through-hole penetrating the outer peripheral surface; a first inner annular channel communicating with the first radial through-hole, the first inner annular channel being located around the outer periphery of the first oil passage; a second radial through-hole communicating with the first inner annular channel; a second inner annular channel communicating with the second radial through-hole, the first inner annular channel being closer to the first oil passage than the second inner annular channel; a third radial through-hole communicating with the second inner annular channel; and an axial oil hole communicating with the third radial through-hole.

2. The rotary oil seal of the dual hydraulic system as described in claim 1, wherein, The first oil passage extends along an axial direction, the first radial perforation extends along a radial direction, the first inner annular channel is annular and encircles the circumference and extends along the axial direction, and the second radial perforation and the third radial perforation extend along the radial direction.

3. The rotary oil seal of the dual hydraulic system as described in claim 1, wherein, The second radial perforation is located between the first inner ring channel and the second inner ring channel. One end of the second radial perforation is connected to the first inner ring channel, and the other end of the second radial perforation is connected to the second inner ring channel.

4. The rotary oil seal of the dual hydraulic system as described in claim 1, wherein, One end of the third radial perforation is connected to the second inner ring channel, and the other end of the third radial perforation penetrates the outer peripheral surface.

5. The rotary oil seal of the dual hydraulic system as described in claim 1, wherein, The axial oil hole is closer to the outer peripheral surface and farther away from the first oil passage.

6. The rotary oil seal of the dual hydraulic system as described in claim 1, wherein, It also has an adjusting bolt, which is screwed into the third radial through hole. The adjusting bolt passes through the third radial through hole from the outer peripheral surface and is used to block the axial oil hole.

7. The rotary oil seal of the dual hydraulic system as described in claim 2, wherein, The connector body has a first end and a second end opposite to each other along the axial direction. The second end is abutted against and connected to the main shaft. The first radial through hole is closer to the first end and farther from the second end. The first inner ring channel is closer to the first end and farther from the second end.

8. The rotary oil seal of the dual hydraulic system as described in claim 2, wherein, An oil seal is installed on each of the two opposite sides of the second inner ring channel along the axial direction.

9. The rotary oil seal of the dual hydraulic system as described in claim 7, wherein, The connector body is divided into a first shaft section and a second shaft section. The first radial through hole is located in the first shaft section. The first inner ring channel is located in the first shaft section and the second shaft section. The second inner ring channel, the third radial through hole and the axial oil hole are located in the second shaft section. The first end is located in the first shaft section and the second end is located in the second shaft section.

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