High-temperature and high-speed rotating joint for thin oil circulation lubrication and cooling

Abstract

The utility model relates to the technical field of bearing lubrication, and discloses a high-temperature and high-speed rotary joint for thin oil circulation lubrication and cooling, which comprises an elbow, a shell, a bearing box, an end cover, a rotor and an inner pipe, a heat insulation sleeve is arranged in the rotor, an end face seal I is arranged in the end cover, an end face seal II is arranged in the end cover, and the inner pipe is arranged in the shell. A first tapered roller bearing is arranged in the bearing box, a positioning ring is arranged in the bearing box, a second tapered roller bearing is arranged in the bearing box, a mounting assembly is arranged in the bearing box, a first graphite ring is fixedly connected to the outer portion of the rotor, and a second graphite ring is fixedly connected to the outer portion of the rotor. And the outer part of the rotor is fixedly connected with a corrugated pipe. According to the utility model, the inner ring is fixed on the rotor, when the temperature rises, the bearing component expands, the outer rings of the two bearings move inwards, and the spring II compensates the axial variation caused by the expansion of the bearings, so that the bearings return to normal.

Description

Technical Field

[0001] The utility model relates to the technical field of bearing lubrication, in particular to a high-temperature and high-speed rotary joint with thin oil circulation lubrication and cooling. Background Art

[0002] High-speed rotary joint is a device for transferring coolant to high-speed rotating shafts such as machine tool spindles. At present, imported high-speed rotary joints are widely used on domestic machine tools. It includes rotor, rotor sealing ring, stator, stator sealing ring, bearing, coolant (medium) channel, spring, etc.

[0003] In the prior art, some traditional high-temperature and high-speed rotary joints with thin oil circulation lubrication and cooling cannot compensate for the expansion of the pipeline due to the expansion or contraction of the pipeline or components caused by temperature changes during specific use. Therefore, in response to the above problems, a high-temperature and high-speed rotary joint with thin oil circulation lubrication and cooling is proposed. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a high-temperature and high-speed rotary joint for thin oil circulation lubrication and cooling, aiming to improve the problems in the prior art that the expansion compensation of the pipeline cannot be performed when the temperature changes and the flow rate of the thin oil cannot be adjusted.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-temperature and high-speed rotary joint with thin oil circulation lubrication and cooling, comprising an elbow and a shell, a bearing box, an end cover, a rotor, and an inner tube, wherein the interior of the rotor is provided with a heat insulation sleeve, the interior of the end cover is provided with an end face seal 1, the interior of the end cover is provided with an end face seal 2, the interior of the bearing box is provided with a tapered roller bearing 1, the interior of the bearing box is provided with a positioning ring, the interior of the bearing box is provided with a tapered roller bearing 2, the interior of the bearing box is provided with a mounting assembly, the exterior of the rotor is fixedly connected with a graphite ring 1, the exterior of the rotor is fixedly connected with a graphite ring 2, the exterior of the rotor is fixedly connected with a bellows, the exterior of the rotor is detachably connected with a fixing ring, the interior of the shell is provided with an inner ring, the outer sleeve of the inner tube is provided with a shaft sleeve, and the interior of the shaft sleeve is fixedly connected with a stop ring.

[0006] As a further description of the above technical solution:

[0007] The mounting assembly includes two hexagon socket head bolts 1, and the external threads of the hexagon socket head bolts 1 are connected to the interior of the bearing box.

[0008] As a further description of the above technical solution:

[0009] A spring 1 is arranged inside the positioning ring, a cylindrical core body is fixedly connected to the bottom of the spring 1, a spring 2 is fixedly connected to the right side of the positioning ring, a retaining ring is fixedly connected to the bottom of the positioning ring, a spring 3 is arranged on the left side of the tapered roller bearing 1, an end face seal 3 is fixedly connected to the left side of the spring 3, an end face seal 4 is fixedly connected to the left side of the end face seal 3, and a connecting block is fixedly connected to the left side of the end face seal 4.

[0010] As a further description of the above technical solution:

[0011] An O-ring is arranged outside the first graphite ring, an elastic sealing body is fixedly connected to the outside of the rotor, a second hexagon socket bolt is threadedly connected to the inside of the fixing ring, and a fastening screw is fixedly connected to the outside of the rotor.

[0012] As a further description of the above technical solution:

[0013] One end of the heat insulation sleeve is connected to the rotor by thread, and the other end is connected by a conical surface.

[0014] As a further description of the above technical solution:

[0015] The outer portion of the O-ring is arranged between the first graphite ring and the bearing box.

[0016] As a further description of the above technical solution:

[0017] One end of the positioning ring is fixedly connected to the outer ring of the second tapered roller bearing.

[0018] As a further description of the above technical solution:

[0019] One side of the second spring is fixedly connected to the left side of the positioning ring, and the other side of the second spring is fixedly connected to the right side of the second tapered roller bearing.

[0020] The utility model has the following beneficial effects:

[0021] 1. In the utility model, the inner rings of the tapered roller bearings 1 and 2 are fixed on the rotor and separated by a retaining ring. One end of the locating ring is connected to the outer ring of the tapered roller bearing 2, and the other end is connected to the outer ring of the tapered roller bearing 1 through the spring 2. When the temperature rises, the bearing components expand, the pressure increases, and the outer rings of the two bearings move inward. The spring 2 compensates for the axial change caused by the bearing expansion, so that the internal and external clearances of the bearings remain unchanged and the bearings are in normal working condition.

[0022] 2. In the utility model, when the thin oil flows through the positioning ring, due to the end face seals three and four at two locations, the thin oil can only flow in from the right hole, and flow to the tapered roller bearing two through the gap between the cylindrical core body and the left hole. The position of the cylindrical core body can be adjusted by changing the pressure of the regulating port, thereby changing the size of the gap between the cylindrical core body and the left hole, and then adjusting the thin oil flow rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A three-dimensional diagram of a high-temperature and high-speed rotary joint with thin oil circulation lubrication and cooling proposed by the utility model;

[0024] Figure 2 This is a cross-sectional view of the rotor structure of a high-temperature and high-speed rotary joint with thin oil circulation lubrication and cooling proposed by the utility model;

[0025] Figure 3 This is a cross-sectional view of the heat-insulating sleeve structure of a high-temperature and high-speed rotary joint with thin oil circulation lubrication and cooling proposed by the utility model;

[0026] Figure 4 This is a schematic diagram of the structure of a tapered roller bearing of a high-temperature and high-speed rotary joint with thin oil circulation lubrication and cooling proposed by the utility model;

[0027] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0028] Figure 6 This is a schematic diagram of the positioning ring structure of a high-temperature and high-speed rotary joint with thin oil circulation lubrication and cooling proposed by the utility model;

[0029] Figure 7 The utility model provides a bellows structure schematic diagram of a high-temperature and high-speed rotary joint with thin oil circulation lubrication and cooling.

[0030] Legend:

[0031] 1. Elbow; 2. Shell; 3. Bearing box; 4. End cover; 5. Rotor; 6. Inner tube; 7. Insulation sleeve; 8. End seal one; 9. End seal two; 10. Tapered roller bearing one; 11. Positioning ring; 12. Tapered roller bearing two; 13. Hexagon socket bolt one; 14. Graphite ring one; 15. Graphite ring two; 16. Bellows; 17. Retaining ring; 18. Inner ring; 19. Bushing; 20. Stop ring; 21. Spring one; 22. Cylindrical core; 23. Spring two; 24. Retaining ring; 25. Spring three; 26. End seal three; 27. End seal four; 28. Connecting block; 29. ​​O-ring; 30. Elastic seal body; 31. Hexagon socket bolt two; 32. Fastening screw. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] Reference Figure 1 - Figure 3 As shown, an embodiment of the utility model is provided: a high-temperature and high-speed rotary joint with thin oil circulation lubrication and cooling, comprising an elbow 1 and a shell 2, a bearing box 3, an end cover 4, a rotor 5, and an inner tube 6. A heat insulating sleeve 7 is arranged inside the rotor 5. This is to prevent the influence of the high temperature environment on the rotor 5, effectively reduce heat conduction and improve the stability of the system. The heat insulating sleeve 7 is threadedly connected to the rotor 5 at one end and connected to a conical surface at the other end. An end face seal 1 8 is arranged inside the end cover 4. The end face seal 1 8 and the end face seal 2 9 are used to ensure that the lubricating oil in the system does not leak, and prevent external impurities from entering, so as to maintain the sealing and cleanliness of the system. An end face seal 2 9 is arranged inside the end cover 4.

[0034] Reference Figure 2 and Figure 4 , Figure 7 As shown, the bearing box 3 is provided with a tapered roller bearing 10 inside. The tapered roller bearing 10 and the tapered roller bearing 2 12 are to ensure its stability and balance during high-speed rotation. The bearing box 3 is provided with a positioning ring 11 inside. The positioning ring 11 is to ensure the normal operation of the bearing. One end of the positioning ring 11 is fixedly connected to the outer ring of the tapered roller bearing 2 12. The bearing box 3 is provided with a tapered roller bearing 2 12 inside. The bearing box 3 is provided with a mounting assembly inside. The mounting assembly includes two hexagon socket head bolts 13 and a hexagon socket head bolt 14. The external thread of 13 is connected to the inside of the bearing box 3, and the outside of the rotor 5 is fixedly connected with a graphite ring 14. The graphite ring 14 and the graphite ring 2 15 are used to provide lubrication and sealing effects to reduce friction and wear with other components. The outside of the rotor 5 is fixedly connected with a graphite ring 2 15. The outside of the rotor 5 is fixedly connected with a bellows 16. The bellows 16 and the fixing ring 17 are for flexible support and compensation between other components to reduce the impact of axial and radial expansion caused by temperature changes on the system. The outside of the rotor 5 is detachably connected with a fixing ring 17.

[0035] Reference Figure 2 and Figure 5As shown, an inner ring 18 is arranged inside the shell 2, and the inner ring 18 is used to maintain the overall structural stability of the joint. A shaft sleeve 19 is arranged outside the inner tube 6, and a stop ring 20 is fixedly connected inside the shaft sleeve 19. The stop ring 20 is used to limit the axial displacement of the inner tube 6 to ensure its safe operation. These design features enable the high-temperature and high-speed rotary joint to operate stably in harsh working environments, while ensuring lubrication, sealing and cooling effects, extending the service life of the equipment and improving working efficiency. A spring 21 is arranged inside the positioning ring 11 to help reduce the impact of external vibration on the system. A cylindrical core 22 is fixedly connected to the bottom of the spring 21 to avoid unnecessary swinging or falling off during operation. The right side of the positioning ring 11 A spring 23 is fixedly connected to the side to adapt to the working state of the joint under different conditions. One side of the spring 23 is fixedly connected to the left side of the positioning ring 11, and the other side of the spring 23 is fixedly connected to the right side of the tapered roller bearing 2 12. A retaining ring 24 is fixedly connected to the bottom of the positioning ring 11 to ensure that it is stably fixed in the set position. A spring 3 25 is arranged on the left side of the tapered roller bearing 10 to ensure the stability of the bearing during high-speed rotation. The left side of the spring 3 25 is fixedly connected to an end face seal 3 26 to prevent leakage of external impurities and lubricating oil. The left side of the end face seal 3 26 is fixedly connected to an end face seal 4 27 to ensure that the lubricating oil in the system is not affected by the external environment. The left side of the end face seal 4 27 is fixedly connected to a connecting block 28.

[0036] Reference Figure 6 - Figure 7 As shown, to ensure the stability and reliability of the end face seal, an O-ring 29 is arranged on the outside of the graphite ring 14 to prevent the leakage of lubricating oil and protect the system from pollution of the external environment. The outside of the O-ring 29 is arranged between the graphite ring 14 and the bearing box 3. The outside of the rotor 5 is fixedly connected with an elastic sealing body 30 to prevent the leakage of lubricating oil and reduce friction loss. The internal thread of the fixing ring 17 is connected with a hexagon socket bolt 21 to maintain the stability and reliability of the joint. The outside of the rotor 5 is fixedly connected with a fastening screw 32 to prevent loosening or falling off during high-speed rotation.

[0037] Working principle: When the device is running, the elbow 1 is connected to the housing 2 by bolts, the housing 2 is connected to the bearing box 3 by bolts, the bearing box 3 is equipped with tapered roller bearing 10 and tapered roller bearing 2 12 and positioning ring 11, the bearing box 3 is connected to the end cover 4 by bolts, the end cover 4 is equipped with end face seal 1 8 and end face seal 2 9, the rotor 5 is positioned by the inner ring 18 and tapered roller bearing 10 and tapered roller bearing 2 12, the rotor 5 is equipped with a heat insulation sleeve 7, and the inner tube 6 is installed on the inner wall of the rotor 5 through the sleeve 19 and the stop ring 20. The low-temperature medium is input into the device through the elbow 1 and the inner tube 6, and the heat medium in the device is output through the gap between the rotor 5 and the inner tube 6 and the orifice on the housing 2. The thin oil flows in through the port on the end cover 4, and flows out through the ports on the tapered roller bearing 10, the positioning ring 11, the tapered roller bearing 2 12, and the bearing box 3, to lubricate and cool the bearing, thereby achieving normal operation of the rotary joint under high temperature and high speed conditions.

[0038] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-temperature and high-speed rotary joint with thin oil circulation lubrication and cooling, comprising an elbow (1) and a housing (2), a bearing box (3), an end cover (4), a rotor (5), and an inner tube (6), characterized in that: The rotor (5) is provided with a heat insulating sleeve (7) inside, the end cover (4) is provided with an end face seal (1) inside, the end cover (4) is provided with an end face seal (9) inside, the bearing box (3) is provided with a tapered roller bearing (10) inside, the bearing box (3) is provided with a positioning ring (11) inside, the bearing box (3) is provided with a tapered roller bearing (12) inside, the bearing box (3) is provided with a mounting assembly inside, the rotor (5) is fixedly connected with a graphite ring (14) outside, the rotor (5) is fixedly connected with a graphite ring (15) outside, the rotor (5) is fixedly connected with a bellows (16) outside, the rotor (5) is detachably connected with a fixing ring (17), the housing (2) is provided with an inner ring (18), the outer sleeve of the inner tube (6) is provided with a shaft sleeve (19), and the shaft sleeve (19) is fixedly connected with a retaining ring (20) inside.

2. A high-temperature and high-speed rotary joint with thin oil circulation lubrication and cooling according to claim 1, characterized in that: The mounting assembly comprises two hexagon socket head bolts (13), the external threads of the hexagon socket head bolts (13) being connected to the interior of the bearing box (3).

3. A high-temperature and high-speed rotary joint with thin oil circulation lubrication and cooling according to claim 1, characterized in that: A spring 1 (21) is arranged inside the positioning ring (11), the bottom of the spring 1 (21) is fixedly connected to a cylindrical core body (22), the right side of the positioning ring (11) is fixedly connected to a spring 2 (23), the bottom of the positioning ring (11) is fixedly connected to a retaining ring (24), a spring 3 (25) is arranged on the left side of the tapered roller bearing 1 (10), the left side of the spring 3 (25) is fixedly connected to an end face seal 3 (26), the left side of the end face seal 3 (26) is fixedly connected to an end face seal 4 (27), and the left side of the end face seal 4 (27) is fixedly connected to a connecting block (28).

4. A high-temperature and high-speed rotary joint with thin oil circulation lubrication and cooling according to claim 1, characterized in that: An O-ring (29) is arranged outside the graphite ring (14), an elastic sealing body (30) is fixedly connected to the outside of the rotor (5), a hexagon socket bolt (31) is threadedly connected to the inside of the fixing ring (17), and a fastening screw (32) is fixedly connected to the outside of the rotor (5).

5. The high-temperature and high-speed rotary joint with thin oil circulation lubrication and cooling according to claim 1, characterized in that: One end of the heat insulating sleeve (7) is connected to the rotor (5) by a thread, and the other end is connected by a conical surface.

6. A high-temperature and high-speed rotary joint with thin oil circulation lubrication and cooling according to claim 4, characterized in that: The outside of the O-type sealing ring (29) is arranged between the graphite ring 1 (14) and the bearing box (3).

7. A high-temperature and high-speed rotary joint with thin oil circulation lubrication and cooling according to claim 1, characterized in that: One end of the positioning ring (11) is fixedly connected to the outer ring of the second tapered roller bearing (12).

8. The high-temperature and high-speed rotary joint with thin oil circulation lubrication and cooling according to claim 3, characterized in that: One side of the second spring (23) is fixedly connected to the left side of the positioning ring (11), and the other side of the second spring (23) is fixedly connected to the right side of the second tapered roller bearing (12).

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