Multi-race variable diameter ball type high-strength rotary joint

Abstract

The utility model discloses a kind of multi-race different-diameter ball type high-strength rotary joints, belong to fluid conveying supporting equipment technical field, for connecting a rotator and a static body, rotary joint is equipped between the rotator and static body, to allow to keep fluid seal when relative rotation, it is characterized by: the rotary joint includes: flow inner ring, the flow passage is formed in the flow inner ring, the flow inner ring and outer ring flange have dynamic seal between, flow inner ring and inner ring flange have static seal between, outer ring is sleeved in flow inner ring, flow inner ring is detachably connected with inner ring flange, there is static secondary seal on the connecting surface of flow inner ring and inner ring flange, outer ring is detachably connected with outer ring flange, there is secondary dynamic seal on the connecting surface of outer ring and outer ring flange, solve the problem that raceway wears seriously when rotary joint bears outer ring shearing force, mainly applied to tank truck crane pipe connection aspect.

Description

Technical Field

[0001] This utility model belongs to the technical field of fluid conveying equipment, specifically relating to a high-strength rotary joint with multi-track unequal diameter ball joint. Background Technology

[0002] Currently, the loading and unloading of fluid media between transport tank trucks and receiving station storage tanks is mainly achieved through loading arms. During the transport process, the loading arms can rotate with multiple degrees of freedom. The rotary joint is the key component for realizing the multi-joint rotation of the loading arms. It must also bear the weight of the loading arms, the weight of the fluid media, and the forces generated by personnel operating the loading arms. Furthermore, it is required to achieve a dynamic seal during rotation to prevent leakage of the fluid media.

[0003] The structure of a rotary joint is inherently determined by its load-bearing capacity and performance. Chinese Patent Publication No. (CN220366088U) discloses a rotary joint that adopts a double raceway design with the same rotation diameter for both raceways. The balls are set in the raceway between the outer and inner rings. When the rotary joint is subjected to external forces, the balls will bear the shear force of the inner and outer rings. Long-term operation can easily cause severe wear of the raceways, resulting in a weak load-bearing capacity and a short service life. Moreover, most rotary joints currently in use adopt a double raceway design with the same rotation diameter. Utility Model Content

[0004] The purpose of this invention is to provide a high-strength rotary joint mechanism for multi-raceway unequal diameter ball joints, which solves the problem of severe raceway wear when the rotary joint is subjected to outer ring shear force.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a multi-raceway reducing ball type high-strength rotary joint for connecting a rotating body and a stationary body, wherein a rotary joint is provided between the rotating body and the stationary body to allow fluid sealing during relative rotation, characterized in that: the rotary joint includes: a flow inner ring, a flow channel formed within the flow inner ring, a dynamic seal between the flow inner ring and an outer ring flange, a static seal between the flow inner ring and the inner ring flange, an outer ring fitted onto the flow inner ring, the flow inner ring being detachably fixedly connected to the inner ring flange, a static secondary seal on the connection surface between the flow inner ring and the outer ring flange, the outer ring being detachably fixedly connected to the outer ring flange, and a secondary dynamic seal on the connection surface between the flow inner ring and the inner ring flange.

[0006] Further: the outer side of the inner circulation ring is formed in a stepped shape, which includes at least 3 stepped surfaces, including at least one transverse section and two vertical sections connected to the transverse section. A first rolling diameter is opened on the transverse section, a second rolling diameter is opened on one vertical section, and a third rolling diameter is opened on the other vertical section.

[0007] The outer ring has a stepped surface that matches the inner ring, and a fourth, fifth, and sixth roller diameter corresponding to the first, second, and third roller diameters are formed on the stepped surface.

[0008] The first roller diameter and the fourth roller diameter form the first raceway, the second roller diameter and the fifth roller diameter form the second raceway, and the third roller diameter and the sixth roller diameter form the third raceway, wherein the rotation diameters of the first raceway, the second raceway and the third raceway are different;

[0009] The first raceway contains the first ball, the second raceway contains the second ball, and the third raceway contains the third ball.

[0010] Furthermore: the first and third rolling balls have the same diameter, while the second rolling ball has a different diameter than the first rolling ball.

[0011] Furthermore, the diameters of the first, second, and third rolling balls are all different.

[0012] Furthermore, the connection surface between the outer ring and the inner ring flange is also provided with a dust seal.

[0013] Furthermore, the connection surface between the outer ring and the outer ring flange has a sealing gasket.

[0014] This utility model has the following advantages: by setting first, second, and third raceways with different rotation diameters, and first, second, and third balls with different diameters, the second ball bears the main positive pressure. The positions of the first and third balls are used to achieve positioning between the inner ring 1 and the outer ring 7, and at the same time, the second ball is positioned. Meanwhile, the first and third raceways with different rotation diameters allow the first and third balls to bear the main bending moment, thereby improving the load-bearing capacity of the rotary joint. Attached Figure Description

[0015] Figure 1 This is a structural diagram of the present invention;

[0016] Figure 2 This utility model Figure 1 Enlarged view of a portion of point A in the middle.

[0017] In the diagram: 1. Inner flow ring; 2. Flow channel; 3. Outer ring flange; 4. Dynamic seal; 5. Inner ring flange; 6. Static seal; 7. Outer ring; 8. Static secondary seal; 9. Secondary dynamic seal; 10. First roller diameter; 11. Second roller diameter; 12. Third roller diameter; 13. Fourth roller diameter; 14. Fifth roller diameter; 15. Sixth roller diameter; 16. First ball; 17. Second ball; 18. Third ball; 19. Dust seal; 20. Sealing gasket. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] In one embodiment, such as Figures 1-2 As shown, a multi-raceway reducing ball type high-strength rotary joint is used to connect a rotating body and a stationary body. The rotary joint is provided between the rotating body and the stationary body to allow fluid sealing during relative rotation. The rotary joint is characterized by comprising: a flow inner ring 1, a flow channel 2 formed within the flow inner ring 1, a dynamic seal 4 between the flow inner ring 1 and an outer ring flange 3, a sealing gasket 20 at the connection surface between the outer ring 7 and the outer ring flange 3, a static seal 6 between the flow inner ring 1 and the inner ring flange 5, an outer ring 7 fitted onto the flow inner ring 1, the flow inner ring 1 being detachably fixedly connected to the inner ring flange 5, a static secondary seal 8 at the connection surface between the flow inner ring 1 and the outer ring flange 3, the outer ring 7 being detachably fixedly connected to the outer ring flange 3, a secondary dynamic seal 9 at the connection surface between the outer ring 7 and the outer ring flange 3, and a dust seal 19 at the connection surface between the outer ring 7 and the inner ring flange 5.

[0020] The outer side of the inner circulation ring 1 is stepped, which includes at least 3 stepped surfaces, including at least one transverse section and two vertical sections connected to the transverse section. A first rolling diameter 10 is opened on the transverse section, a second rolling diameter 11 is opened on one vertical section, and a third rolling diameter 12 is opened on the other vertical section.

[0021] The outer ring 7 has a stepped surface that matches the inner ring 1, and a fourth rolling diameter 13, a fifth rolling diameter 14 and a sixth rolling diameter 15 corresponding to the first rolling diameter 10, the second rolling diameter 11 and the third rolling diameter 12 are opened on the stepped surface.

[0022] The first roller diameter 10 and the fourth roller diameter 13 form a first raceway, the second roller diameter 11 and the fifth roller diameter 14 form a second raceway, and the third roller diameter 12 and the sixth roller diameter 15 form a third raceway, wherein the rotation diameters of the first raceway, the second raceway and the third raceway are different.

[0023] The first raceway contains a first rolling ball 16, the second raceway contains a second rolling ball 17, and the third raceway contains a third rolling ball 18. The diameters of the first rolling ball 16, the second rolling ball 17, and the third rolling ball 18 are all different.

[0024] By adopting the above technical solution, the outer ring flange 3 is connected to the rotating body, and the inner ring flange 5 is connected to the stationary body. The flow medium flows from the rotating body to the stationary body through the flow channel 2. The diameter of the second ball 17 is smaller than that of the first ball 16 and the third ball 18. The first ball 16 and the third ball 18 are loaded in the first raceway and the third raceway with different rotation diameters to realize the positioning between the inner ring 1 and the outer ring 7, and at the same time realize the positioning of the second ball in the second raceway. The first ball 16, the second ball 17 and the third ball 18 move in a circular motion in the first raceway, the second raceway and the third raceway with corresponding different rotation diameters, so that the inner ring and the outer ring form independent rotation.

[0025] After the rotating body and the stationary body are connected, when the rotary joint is subjected to positive pressure, the positive pressure borne by the outer ring flange 3 and the inner ring flange 5 is mostly borne by the second ball 17 located in the second raceway in the transverse section of the inner ring 1 and the outer ring 7. Since the rotation diameters of the first raceway and the third raceway are different, the first ball 16 and the third ball 18 bear a small portion of the positive pressure. The first ball 16 and the third ball 18 bear shear force, which improves the load-bearing capacity of the rotary joint.

[0026] In one embodiment, the first rolling ball 16 and the third rolling ball 18 have the same diameter, and the second rolling ball 17 has a different diameter than the first rolling ball 16.

[0027] This invention is simple to operate, convenient to use, and suitable for widespread promotion and application. Although embodiments of this invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and alterations can be made to these embodiments without departing from the principles and spirit of this invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-raceway reducing ball joint for connecting a rotating body and a stationary body, wherein the rotating body and the stationary body are provided with a rotary joint to allow fluid sealing during relative rotation, characterized in that: The rotary joint includes: a flow inner ring (1), a flow channel (2) formed inside the flow inner ring (1), a dynamic seal (4) between the flow inner ring (1) and the outer ring flange (3), a static seal (6) between the flow inner ring (1) and the inner ring flange (5), an outer ring (7) fitted on the flow inner ring (1), the flow inner ring (1) being detachably fixedly connected to the inner ring flange (5), a static secondary seal (8) on the connection surface between the flow inner ring (1) and the outer ring flange (3), the outer ring (7) being detachably fixedly connected to the outer ring flange (3), and a secondary dynamic seal (9) on the connection surface between the fluid inner ring (1) and the inner ring flange (5).

2. The multi-raceway reducing ball joint with high strength according to claim 1, characterized in that: The inner circulation ring (1) is formed in a stepped shape, which includes at least three stepped surfaces, including at least one transverse section and two vertical sections connected to the transverse section. A first rolling diameter (10) is opened on the transverse section, a second rolling diameter (11) is opened on one vertical section, and a third rolling diameter (12) is opened on another vertical section. The outer ring (7) has a stepped surface that matches the inner ring (1), and a fourth rolling diameter (13), a fifth rolling diameter (14) and a sixth rolling diameter (15) corresponding to the first rolling diameter (10), the second rolling diameter (11) and the third rolling diameter (12) are opened on the stepped surface. The first roller diameter (10) and the fourth roller diameter (13) form the first raceway, the second roller diameter (11) and the fifth roller diameter (14) form the second raceway, and the third roller diameter (12) and the sixth roller diameter (15) form the third raceway, wherein the rotation diameters of the first raceway, the second raceway and the third raceway are different; A first ball (16) is located in the first raceway, a second ball (17) is located in the second raceway, and a third ball (18) is located in the third raceway.

3. A high-strength rotary joint with multi-raceway reducing diameter balls according to claim 2, characterized in that: The first rolling ball (16) and the third rolling ball (18) have the same diameter, while the second rolling ball (17) has a different diameter than the first rolling ball (16).

4. A high-strength rotary joint with multi-raceway reducing diameter balls according to claim 3, characterized in that: The diameters of the first rolling ball (16), the second rolling ball (17), and the third rolling ball (18) are all different.

5. A high-strength rotary joint with multi-raceway reducing diameter balls according to claim 1, characterized in that: The connection surface between the outer ring (7) and the inner ring flange (5) is also provided with a dust seal (19).

6. A high-strength rotary joint with multi-raceway reducing diameter balls according to claim 2, characterized in that: The connection surface between the outer ring (7) and the outer ring flange (3) has a sealing gasket (20).

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