Five-axis rotary table of rotary hydraulic device with anti-overflow structure

Abstract

The application provides a five-axis rotary table of a rotary hydraulic device with an anti-overflow structure, which comprises a rotating shaft, a shaft sleeve and a workbench, wherein a positive pressure medium pipeline is arranged outside a high-pressure gas or high-pressure hydraulic oil pipeline of a first ring and a last ring, an opposite force acting on a high-pressure gas or high-pressure hydraulic oil annular sealing ring of the first ring and the last ring is applied, the high-pressure gas or high-pressure hydraulic oil can be discharged through the positive pressure pipeline, the high-pressure gas or high-pressure hydraulic oil is prevented from overflowing, and the five-axis rotary table is protected from being damaged, in addition, when the overflowing high-pressure gas or high-pressure hydraulic oil can be output through the positive pressure pipeline, the pressure sensor detects abnormal pressure and alarms, so that the damage of the high-pressure gas or high-pressure hydraulic oil annular sealing ring can be found in time, and the automatic clamping and positioning of a workpiece can be continuously and effectively used intelligently.

Description

Technical Field

[0001] This invention relates to the technical field of rotating shafts, and more specifically, to a five-axis rotary table of a rotary hydraulic device with an anti-overflow structure. Background Technology

[0002] Workpieces on traditional five-axis machine tool worktables are mostly manually clamped and pressed, which no longer meets the current market demand for intelligent, automated, and continuous production. Traditional rotary joints do not have automatic alarm functions. If used inside a five-axis rotary table, high-pressure oil leakage due to seal failure will not be detected in time, leading to damage and failure of electrical components inside the five-axis rotary table and causing huge losses. Therefore, the need for a rotary joint that can actively monitor for leaks has been put forward.

[0003] Existing patent number: CN211288321U, discloses a five-axis cradle turntable hydraulic system, wherein each of the first oil passages is opened along the axial direction of the B-axis distributor, and the multiple first oil passages are spaced apart circumferentially along the B-axis distributor; each of the second oil passages is opened along the axial direction of the B-axis drive shaft, and the multiple second oil passages are spaced apart circumferentially along the B-axis drive shaft; each of the third oil passages is opened along the axial direction of the C-axis distributor, and the multiple third oil passages are spaced apart circumferentially along the C-axis distributor; each of the fourth oil passages is opened along the axial direction of the C-axis distributor sleeve, and the multiple fourth oil passages are spaced apart circumferentially along the C-axis distributor sleeve. A plurality of first annular grooves are provided between the B-axis drive shaft and the B-axis distributor. The plurality of first annular grooves are spaced apart along the axial direction of the B-axis distributor. Each first annular groove is circumferentially arranged around the outer circular surface of the B-axis distributor and the inner circular surface of the B-axis drive shaft. Each first oil path is connected to a radially opened first sub-oil path, and each second oil path is connected to a radially opened second sub-oil path. Each first annular groove is connected to both the first and second sub-oil paths. A plurality of second annular grooves are provided between the C-axis distributor sleeve and the C-axis distributor. The plurality of second annular grooves are spaced apart along the axial direction of the C-axis distributor. Each second annular groove is circumferentially arranged around the outer circular surface of the C-axis distributor and the inner circular surface of the C-axis distributor sleeve. Each third oil path is connected to a radially opened third sub-oil path, and each fourth oil path is connected to a radially opened fourth sub-oil path. Each second annular groove is connected to both the third and fourth sub-oil paths. Since the B-axis drive shaft is the rotating main body of the B-axis assembly, and the C-axis drive shaft and C-axis distributor sleeve are the rotating main bodies of the C-axis assembly, while the B-axis distributor and C-axis distributor are respectively one of the fixed parts of the B-axis assembly and C-axis assembly, the design of multiple first annular grooves and multiple second annular grooves ensures that regardless of the rotation of the B-axis drive shaft and C-axis drive shaft, each first oil passage is always connected to the second oil passage, and each third oil passage is always connected to the fourth oil passage. Multiple first rotary seals are provided between the B-axis drive shaft and the B-axis distributor, and these first rotary seals are spaced apart along the axial direction of the B-axis distributor. One first rotary seal is provided on each side of each first annular groove. Similarly, multiple second rotary seals are provided between the C-axis distributor sleeve and the C-axis distributor, and these second rotary seals are spaced apart along the axial direction of the C-axis distributor. One second rotary seal is provided on each side of each second annular groove.Multiple first rotary seals and multiple second rotary seals can provide a good sealing effect, ensuring the sealing and isolation effect on each first annular groove and each second annular groove.

[0004] The existing structure is acceptable if it can be visually inspected externally or if leakage will not cause significant damage. However, a five-axis precision rotary table integrates complex electrical components and precision displacement sensors. If the seals inside the traditional rotary joint age, fail, wear, or shift over time, high-pressure gas or hydraulic oil will leak out onto the rotary shaft, causing the precision displacement sensors and motor coils inside the five-axis rotary table to burn out, resulting in damage to the machine tool. Summary of the Invention

[0005] In view of this, in order to solve the above problems, the present invention proposes a five-axis rotary table of a rotary hydraulic device with an anti-overflow structure. By setting high-pressure gas pipelines 50 outside the high-pressure gas or high-pressure hydraulic oil pipelines 40 of the first and last turns, a reverse force relative to the action of the high-pressure gas or high-pressure hydraulic oil annular seal rings of the first and last turns is applied, thereby making the high-pressure gas or high-pressure hydraulic oil annular seal rings less prone to displacement and improving sealing performance. At the same time, even if the high-pressure gas or high-pressure hydraulic oil annular seal rings are damaged, they can be discharged through the positive pressure pipeline 53, preventing high-pressure gas or high-pressure hydraulic oil from overflowing into the rotary joint and protecting the five-axis rotary table from damage. Furthermore, when the overflowing high-pressure gas or high-pressure hydraulic oil can be output through the positive pressure pipeline 53, the pressure sensor detects the pressure abnormality and alarms, thereby timely detecting damage to the high-pressure gas or high-pressure hydraulic oil annular seal rings, truly realizing continuous, effective and intelligent use of automatic workpiece clamping and positioning.

[0006] An automatic clamping five-axis rotary table with an anti-overflow rotary joint includes: a rotary shaft 10, a bushing 20, and a worktable 30. The bushing 20 is sleeved on the outer surface of the rotary shaft 10, and the worktable 30 is connected to one axial end of the rotary shaft 10. The rotary shaft 10 can drive the worktable 30 to rotate within the bushing 20. Multiple turns of high-pressure gas or high-pressure hydraulic oil lines 40 at different heights are axially spaced between the rotary shaft 10 and the bushing 20. The upper part of the first turn of the high-pressure gas or high-pressure hydraulic oil line 40 is parallel to the upper part of the last turn. Each high-pressure gas pipeline 50 is provided at the lower axial part of the high-pressure gas or high-pressure hydraulic oil pipeline 40. A second annular sealing ring 54 is provided axially between the high-pressure gas pipeline 50 and the adjacent high-pressure gas or high-pressure hydraulic oil pipeline 40. The high-pressure gas inside the high-pressure gas pipeline 50 applies a reverse force to the corresponding second annular sealing ring 54 relative to the action of the high-pressure gas or high-pressure hydraulic oil, thereby making the high-pressure gas or high-pressure hydraulic oil annular sealing ring less prone to displacement, improving the sealing performance, and preventing the high-pressure gas or high-pressure hydraulic oil from overflowing.

[0007] In some embodiments, the high-pressure gas or high-pressure hydraulic oil pipeline 40 is composed of multiple annular first grooves 41 of different heights with axial spacing on the outer circular surface of the rotating shaft 10 near the bushing 20 or the inner circular surface of the bushing 20 near the rotating shaft 10. A first annular sealing ring 42 is provided at the axial spacing between two adjacent annular first grooves 41. High-pressure gas or high-pressure hydraulic oil is supplied in each annular first groove 41. Annular second grooves 51 are provided at the upper part of the first annular first groove 41 and the lower part of the last annular first groove 41. High-pressure gas is supplied in each annular second groove 51.

[0008] In some embodiments, each of the radially opposite surfaces of the annular first groove 41 is provided with an oil inlet hole 43. Each oil inlet hole 43 is connected to the output end of a fourth oil circuit pipe 44, or each oil inlet hole 43 is connected to the output end of a fourth oil circuit pipe 44. The input end of the oil circuit pipe is connected to an external high-pressure oil pipe. When each oil inlet hole 43 is connected to the output end of a fourth oil circuit pipe 44, it is easy to control the pressure of the high-pressure gas or high-pressure hydraulic oil circuit 40.

[0009] Furthermore, the end of the bushing 20 away from the axial direction of the worktable 30 is fixedly connected to the rear cover 60 in the radial direction, and the high-pressure oil pipe passes through the rear cover 60 and is connected to an external high-pressure liquid booster device.

[0010] In some embodiments, each of the annular first grooves 41 is provided with an oil outlet 45 at its bottom, and the worktable 30 is provided with a second oil passage 31 in the axial direction and a third oil passage 32 in the axial direction. The second oil passage 31 and the third oil passage 32 are cross-connected. The high-pressure gas or high-pressure hydraulic oil in each of the annular first grooves 41 is transported from the oil outlet 45 to the second oil passage 31 and the third oil passage 32 in the axial direction of the worktable 30 through the oil guide pipe 46.

[0011] Furthermore, the second oil passage 31 and the third oil passage 32 in the axial direction of the worktable 30 are connected to the vise 13 on the worktable 30. When there is high-pressure gas or high-pressure hydraulic oil in the second oil passage 31 and the third oil passage 32 in the axial direction of the worktable 30, the vise 13 on the worktable 30 clamps the worktable. When there is no high-pressure gas or high-pressure hydraulic oil, the vise 13 releases the worktable, thereby achieving the purpose of automatic clamping of the workpiece on the worktable 30 without manual operation.

[0012] In some embodiments, a third annular sealing ring 55 is provided at the upper part of the first annular second groove 51 and the lower part of the last annular second groove 51, so that the positive pressure gas in the annular second groove 51 is continuously maintained, pushing the sealing ring 54 tight, making it less likely for the oil pressure inside the rotary joint to leak out.

[0013] Furthermore, the positive pressure gas in the annular second groove 51 maintains a constant pressure, so that the positive pressure gas in the annular second groove 51 always applies a reverse force to the first and last annular sealing rings 54 relative to the action of high pressure gas or high pressure hydraulic oil, making it difficult for the high pressure oil in the oil groove to overflow through the sealing ring.

[0014] Furthermore, each of the annular second grooves 51 is provided with an input hole 52, which is connected to the output end of a positive pressure pipeline 53 or to the output end of a positive pressure pipeline 53 respectively. The input end of the positive pressure pipeline 53 is connected to a positive pressure gas input pipeline. The overflowing high-pressure gas or high-pressure hydraulic oil can be output through the positive pressure pipeline 53. When the input hole 52 is connected to the output end of a positive pressure pipeline 53 respectively, the change of the pressure value of the positive pressure pipeline 53 is monitored to actively identify whether the rotary joint is leaking.

[0015] Furthermore, a pressure sensor is provided on the positive pressure pipeline 53. When the overflowing high-pressure gas or high-pressure hydraulic oil can be output through the positive pressure pipeline 53, the pressure sensor will detect an abnormal pressure and trigger an alarm, thereby promptly detecting damage to the annular seal of the high-pressure gas or high-pressure hydraulic oil.

[0016] In some embodiments, a fourth annular sealing ring 57 is provided on the mounting surface between the rotating shaft 10 and the worktable 30, so that high-pressure gas or high-pressure hydraulic oil is not easily spilled into the worktable 30.

[0017] The beneficial effects of this invention are as follows: This invention proposes a five-axis rotary table with an anti-overflow structure for a rotary hydraulic device. By providing high-pressure gas pipelines 50 outside the high-pressure gas or high-pressure hydraulic oil pipelines 40 of the first and last rings, a reverse force is applied to the annular seals of the high-pressure gas or high-pressure hydraulic oil in the first and last rings, making the annular seals less prone to displacement and improving sealing performance. Furthermore, even if the annular seals are damaged, they can be discharged through the positive pressure pipeline 53, preventing overflow and protecting the five-axis rotary table from damage. Moreover, when the overflowing high-pressure gas or high-pressure hydraulic oil is output through the positive pressure pipeline 53, the pressure sensor detects an abnormal pressure and triggers an alarm, thus promptly identifying damage to the annular seals and achieving continuous and effective intelligent operation for automatic workpiece clamping and positioning. Attached Figure Description

[0018] Figure 1 This is an overall structural diagram of the five-axis rotary table of the rotary hydraulic device with anti-overflow structure of the present invention.

[0019] Figure 2 This is a side view of the five-axis rotary table of the rotary hydraulic device with an anti-overflow structure according to the present invention.

[0020] Figure 3 This is a cross-sectional view (AA) of the rotary hydraulic device with an anti-overflow structure according to the present invention.

[0021] Figure 4 This is a cross-sectional view of the bushing of the rotary hydraulic device with an anti-overflow structure according to the present invention.

[0022] Figure 5 The present invention provides a rotary hydraulic device with an anti-overflow structure. Figure 4 Enlarged view of part A.

[0023] Figure 6 This is a perspective view of the bushing of the rotary hydraulic device with an anti-overflow structure according to the present invention.

[0024] Figure 7 This is a perspective view of the rotating shaft of the rotary hydraulic device with an anti-overflow structure according to the present invention.

[0025] Explanation of main component symbols

[0026] Rotary shaft 10; vise 13; bushing 20; worktable 30; second oil passage 31; third oil passage 32; high-pressure gas or high-pressure hydraulic oil pipeline 40; first annular groove 41; first annular seal 42; oil inlet 43; fourth oil passage pipeline 44; oil outlet 45; guide pipe 46; high-pressure gas pipeline 50; second annular groove 51; input hole 52; positive pressure pipeline 53; second annular seal 54; third annular seal 55; fourth annular seal 57; rear cover 60.

[0027] The following detailed description, in conjunction with the accompanying drawings, will further illustrate the present invention. Detailed Implementation

[0028] Example:

[0029] like Figure 1-4 As shown, an automatic clamping five-axis rotary table with an anti-overflow rotary joint includes: a rotary shaft 10, a bushing 20, and a worktable 30. The bushing 20 is sleeved on the outer surface of the rotary shaft 10. The worktable 30 is connected to one axial end of the rotary shaft 10. The rotary shaft 10 can drive the worktable 30 to rotate within the bushing 20. Multiple turns of high-pressure gas or high-pressure hydraulic oil pipelines 40 at different heights are axially spaced between the rotary shaft 10 and the bushing 20. The upper part of the first turn of the high-pressure gas or high-pressure hydraulic oil pipeline 40 is adjacent to the upper part of the last turn. Each high-pressure gas or high-pressure hydraulic oil pipeline 40 is provided with a high-pressure gas pipeline 50 at its lower axial part. A second annular sealing ring 54 is provided axially between the high-pressure gas pipeline 50 and the adjacent high-pressure gas or high-pressure hydraulic oil pipeline 40. The high-pressure gas inside the high-pressure gas pipeline 50 applies a reverse force to the corresponding second annular sealing ring 54 relative to the action of the high-pressure gas or high-pressure hydraulic oil, thereby making it difficult for the high-pressure gas or high-pressure hydraulic oil annular sealing ring to shift, improving the sealing performance, and preventing the high-pressure gas or high-pressure hydraulic oil from overflowing.

[0030] like Figure 6 , Figure 7As shown, the high-pressure gas or high-pressure hydraulic oil pipeline 40 is composed of multiple annular first grooves 41 of different heights and axial spacing on the outer circular surface of the rotating shaft 10 near the bushing 20 or the inner circular surface of the bushing 20 near the rotating shaft 10. A first annular sealing ring 42 is provided at the axial interval between adjacent annular first grooves 41. High-pressure gas or high-pressure hydraulic oil flows through each annular first groove 41. Annular second grooves 5 are provided at the upper part of the first annular first groove 41 and the lower part of the last annular first groove 41. 1. High-pressure gas is provided in each of the annular second grooves 51. Each annular first groove 41 has an oil inlet hole 43 on its radially opposite surface. Each oil inlet hole 43 is connected to the output end of a fourth oil circuit pipe 44 or the input end of the oil circuit pipe 44 is connected to an external high-pressure oil pipe. When each oil inlet hole 43 is connected to the output end of a fourth oil circuit pipe 44, it is easy to control the pressure of the high-pressure gas or high-pressure hydraulic oil circuit 40.

[0031] A third annular sealing ring 55 is provided at the upper part of the first ring of the second annular groove 51 and at the lower part of the last ring of the second annular groove 51. This ensures that the positive pressure gas in the second annular groove 51 is continuously pressurized, pushing the sealing ring 54 tight, making it less likely for the oil pressure inside the rotary joint to leak out. The positive pressure gas in the second annular groove 51 maintains a constant pressure, so that the positive pressure gas in the second annular groove 51 always applies a reverse force relative to the action of the high-pressure gas or high-pressure hydraulic oil to the second annular sealing ring 54 of the first and last rings, making it less likely for the high-pressure oil in the oil groove to overflow through the sealing ring. Each of the second annular grooves 51 is provided with an inlet hole 52, and the inlet hole 52 is connected to... There is an output end of a positive pressure pipeline 53 or it is connected to the output end of a positive pressure pipeline 53. The input end of the positive pressure pipeline 53 is connected to a positive pressure gas input pipeline. The overflowing high-pressure gas or high-pressure hydraulic oil can be output through the positive pressure pipeline 53. When the input port 52 is connected to the output end of a positive pressure pipeline 53, the change of the pressure value of the positive pressure pipeline 53 is monitored to actively identify whether there is a leak in the rotary joint. The positive pressure pipeline 53 is equipped with a pressure sensor. When the overflowing high-pressure gas or high-pressure hydraulic oil can be output through the positive pressure pipeline 53, the pressure sensor detects the abnormal pressure and alarms, thereby timely detecting that the annular seal of the high-pressure gas or high-pressure hydraulic oil is damaged.

[0032] Figure 1-2 and Figure 7 As shown, the end of the bushing 20 away from the worktable 30 in the axial direction is fixedly connected to the rear cover 60 in the radial direction, and the high-pressure oil pipe passes through the rear cover 60 and is connected to an external high-pressure liquid booster device.

[0033] Each of the annular first grooves 41 has an oil outlet 45 at its bottom. The worktable 30 has a second oil passage 31 and a third oil passage 32 in the axial direction. The second oil passage 31 and the third oil passage 32 are cross-connected. High-pressure gas or high-pressure hydraulic oil in each of the annular first grooves 41 is transported from the oil outlet 45 to the second oil passage 31 and the third oil passage 32 in the axial direction of the worktable 30 through the oil guide pipe 46. The second oil passage 31 and the third oil passage 32 in the axial direction of the worktable 30 are connected to the vise 13 on the worktable 30. When there is high-pressure gas or high-pressure hydraulic oil in the second oil passage 31 and the third oil passage 32 in the axial direction of the worktable 30, the vise 13 on the worktable 30 clamps. When there is no high-pressure gas or high-pressure hydraulic oil, the vise 13 releases, thereby achieving the purpose of automatic clamping of the workpiece on the worktable 30 without manual operation.

[0034] The rotating shaft 10 and the worktable 30 are fitted with a fourth annular sealing ring 57, which prevents high-pressure gas or high-pressure hydraulic oil from easily overflowing into the worktable 30.

[0035] The beneficial effects of this invention are as follows: This invention proposes a five-axis rotary table with an anti-overflow structure for a rotary hydraulic device. By providing high-pressure gas pipelines 50 outside the high-pressure gas or high-pressure hydraulic oil pipelines 40 of the first and last rings, a reverse force is applied to the annular seals of the high-pressure gas or high-pressure hydraulic oil in the first and last rings, making the annular seals less prone to displacement and improving sealing performance. Furthermore, even if the annular seals are damaged, they can be discharged through the positive pressure pipeline 53, preventing overflow and protecting the five-axis rotary table from damage. Moreover, when the overflowing high-pressure gas or high-pressure hydraulic oil is output through the positive pressure pipeline 53, the pressure sensor detects an abnormal pressure and triggers an alarm, thus promptly identifying damage to the annular seals and achieving continuous and effective intelligent operation for automatic workpiece clamping and positioning.

[0036] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A five-axis rotary table of a rotary hydraulic device with an anti-overflow structure, comprising: A rotating shaft (10), a bushing (20), and a worktable (30) are provided. The outer surface of the rotating shaft (10) is fitted with the bushing (20), and one axial end of the rotating shaft (10) is connected to the worktable (30). The rotating shaft (10) can drive the worktable (30) to rotate within the bushing (20). The rotating shaft (10) is characterized by having multiple turns of high-pressure gas or high-pressure hydraulic oil pipelines (40) at different heights axially spaced between the rotating shaft (10) and the bushing (20). The upper part of the first turn of the high-pressure gas or high-pressure hydraulic oil pipeline (40) and the lower part of the last turn of the high-pressure gas or high-pressure hydraulic oil pipeline (40) are both provided with positive pressure medium pipelines (50). A second annular sealing ring (54) is provided axially between the positive pressure medium pipeline (50) and its adjacent high-pressure gas or high-pressure hydraulic oil pipeline (40). The positive pressure medium inside the positive pressure medium pipeline (50) is used to seal the corresponding pressure medium. The second annular seal (54) applies a reverse force relative to the action of high pressure gas or high pressure hydraulic oil, thereby making the high pressure gas or high pressure hydraulic oil annular seal less prone to displacement, improving the sealing performance, and preventing high pressure gas or high pressure hydraulic oil from overflowing. The high pressure gas or high pressure hydraulic oil pipeline (40) is composed of multiple annular first grooves (41) with different heights and axial spacing on the outer circular surface of the rotating shaft (10) near the bushing (20) or the inner circular surface of the bushing (20) near the rotating shaft (10). A first annular seal (42) is provided at the axial interval between two adjacent annular first grooves (41). High pressure gas or high pressure hydraulic oil is passed through each annular first groove (41). Annular second grooves (51) are provided at the upper part of the first annular first groove (41) and the lower part of the last annular first groove (41). High pressure gas is provided in each annular second groove (51).

2. The five-axis rotary table of the rotary hydraulic device with anti-overflow structure as described in claim 1, characterized in that: Each of the annular first grooves (41) has an oil inlet hole (43) on its radially opposite side. Each oil inlet hole (43) is connected to the output end of a fourth oil circuit pipe (44) or each oil inlet hole (43) is connected to the output end of a fourth oil circuit pipe (44). The input end of the oil circuit pipe is connected to an external high-pressure oil pipe. When each oil inlet hole (43) is connected to the output end of a fourth oil circuit pipe (44), it is easy to control the pressure of the high-pressure gas or high-pressure hydraulic oil circuit (40).

3. The five-axis rotary table of the rotary hydraulic device with anti-overflow structure as described in claim 2, characterized in that: The end of the bushing (20) away from the worktable (30) is fixedly connected to the rear cover (60) in the radial direction, and the high-pressure oil pipe passes through the rear cover (60) and is connected to the external high-pressure liquid booster device.

4. The five-axis rotary table of the rotary hydraulic device with anti-overflow structure as described in claim 1, characterized in that: Each of the annular first grooves (41) has an oil outlet hole (45) at its bottom. The worktable (30) has a second oil passage (31) in the axial direction and a third oil passage (32) in the axial direction. The second oil passage (31) and the third oil passage (32) are cross-connected. The high-pressure gas or high-pressure hydraulic oil in each of the annular first grooves (41) is transported from the oil outlet hole (45) through the oil guide pipe (46) to the second oil passage (31) and the third oil passage (32) in the axial direction of the worktable (30).

5. The five-axis rotary table of the rotary hydraulic device with anti-overflow structure as described in claim 1, characterized in that: The second oil passage (31) and the third oil passage (32) in the axial direction of the worktable (30) are connected to the vise (13) on the worktable (30). When there is high pressure gas or high pressure hydraulic oil in the second oil passage (31) and the third oil passage (32) in the axial direction of the worktable (30), the vise (13) on the worktable (30) clamps. When there is no high pressure gas or high pressure hydraulic oil, the vise (13) releases, thereby achieving the purpose of automatic clamping of the workpiece on the worktable (30) without manual operation.

6. The five-axis rotary table of the rotary hydraulic device with anti-overflow structure as described in claim 1, characterized in that: The upper part of the first ring second groove (51) and the lower part of the last ring second groove (51) are provided with a third ring seal (55), so that the positive pressure gas in the ring second groove (51) is continuously maintained and the second ring seal (54) is pushed tight, making it less likely for the oil pressure inside the rotary joint to leak out.

7. The five-axis rotary table of the rotary hydraulic device with anti-overflow structure as described in claim 1, characterized in that: The positive pressure gas in the second annular groove (51) maintains a constant pressure, so that the positive pressure gas in the second annular groove (51) always applies a reverse force to the second annular sealing ring (54) of the first and last rings relative to the action of high pressure gas or high pressure hydraulic oil, so that the high pressure oil in the oil groove is not easy to overflow through the sealing ring.

8. The five-axis rotary table of the rotary hydraulic device with anti-overflow structure as described in claim 1, characterized in that: Each of the annular second grooves (51) is provided with an input hole (52). The input hole (52) is connected to the output end of a positive pressure pipeline (53) or is connected to the output end of a positive pressure pipeline (53) respectively. The input end of the positive pressure pipeline (53) is connected to a positive pressure gas input pipeline. The overflowing high-pressure gas or high-pressure hydraulic oil can be output through the positive pressure pipeline (53). When the input hole (52) is connected to the output end of a positive pressure pipeline (53) respectively, the change of the pressure value of the positive pressure pipeline (53) is monitored to actively identify whether the rotary joint is leaking.

9. The five-axis rotary table of the rotary hydraulic device with an anti-overflow structure as described in claim 8, characterized in that: A pressure sensor is provided on the positive pressure pipeline (53). When the overflowing high-pressure gas or high-pressure hydraulic oil can be output through the positive pressure pipeline (53), the pressure sensor will detect the abnormal pressure and alarm, thereby promptly detecting that the annular seal of the high-pressure gas or high-pressure hydraulic oil is damaged.

Images