High-speed high-pressure rotary joint

Abstract

The utility model belongs to the technical field of rotating joints, and particularly relates to a high-speed high-pressure rotating joint. The joint comprises a joint shell, a joint seat, a joint shaft, a shell end oil seal, a first shaft body bearing, a second shaft body bearing, a seat end oil seal and a shaft tail bearing, the joint shaft is arranged in the joint cavity and extends out of the cavity; the shell end oil seal, the first shaft body bearing, the second shaft body bearing, the seat end oil seal and the shaft tail bearing are sequentially arranged in the connector cavity and arranged on the connector shaft in a sleeving mode. An in-shaft oil duct is arranged in the connector shaft and communicated with an oil inlet hole in the seat body. According to the high-speed high-pressure rotary joint, the operation stability and the sealing performance of the rotary joint can be improved.

Description

Technical Field

[0001] The present application belongs to the technical field of rotary joints, and in particular relates to a high-speed and high-pressure rotary joint. Background Art

[0002] The rotary joint in this application specifically refers to a joint that transfers high-pressure liquid oil from a high-speed rotating pipeline to a high-speed rotating device. Existing rotary joints often leak oil during use, especially in high-speed and high-hydraulic applications, resulting in frequent accumulation of oil stains on the floor of the production site. Utility Model Content

[0003] In view of this, the present application provides a high-speed and high-pressure rotary joint to solve all or part of the technical problems described in the background technology section of the present application.

[0004] The solutions provided by this application to solve its technical problems are:

[0005] A high-speed and high-pressure rotary joint, characterized in that it includes a joint shell, a joint seat, a joint shaft, a shell end oil seal, a shaft body bearing, a seat end oil seal, and a shaft tail bearing; a shell cavity and a shell shaft hole are provided in the joint shell, and a seat body cavity and a seat body oil hole are provided in the joint seat; the joint shell and the joint seat are fixedly connected, the joint shaft is provided in the shell cavity and the seat body cavity and extends out of the shell shaft hole; the shell end oil seal, the shaft body bearing, the seat end oil seal, and the shaft tail bearing are sequentially provided in the shell cavity and / or the seat body cavity and are sleeved on the joint shaft; an inner shaft oil channel is provided in the joint shaft, and the inner shaft oil channel is connected to the seat body oil hole.

[0006] Preferably, the shell cavity includes a shell end oil seal portion, a shaft body bearing portion, and a shaft seat embedding portion; the joint seat includes an embedding section and a seat body section; the seat body cavity includes a seat end oil seal portion and a shaft tail bearing portion; the seat body oil hole is opened on the seat body section and passes through the shaft tail bearing portion of the seat body cavity; the embedding section is assembled in the shaft seat embedding portion, the shell end oil seal is assembled in the shell end oil seal portion, the shaft body bearing is assembled in the shaft body bearing portion, the seat end oil seal is assembled in the seat end oil seal portion, and the shaft tail bearing is assembled in the shaft tail bearing portion; one end of the joint shaft extends out of the shell shaft hole, and the other end of the joint shaft is assembled in the shaft tail bearing portion; the oil channel in the shaft is connected to the seat body oil hole.

[0007] Preferably, the shaft body bearing comprises a first shaft body bearing and a second shaft body bearing, and the first shaft body bearing and the second shaft body bearing are both arranged in the shaft body bearing portion of the housing cavity.

[0008] Preferably, the seat body cavity further comprises a transition portion, which is arranged between the seat end oil seal portion and the shaft tail bearing portion.

[0009] Preferably, the joint seat further comprises a connecting section, the connecting section protrudes out of the seat body section, and the seat body oil hole passes through the connecting section.

[0010] Preferably, the joint shaft includes a connecting head, a shaft body section, a limiting section, and a shaft tail section from the outside to the inside; the size of the limiting section is larger than the size of the shaft body section and the shaft tail section; the connecting head is arranged outside the shell cavity, the shell end oil seal and the shaft body bearing are sleeved on the shaft body section, the seat end oil seal is sleeved on the limiting section, and the shaft tail bearing is sleeved on the shaft tail section.

[0011] Preferably, a curved surface is provided on one side of the limiting section close to the shaft tail section.

[0012] Preferably, a connecting groove is provided on the connecting head.

[0013] Preferably, the shell end oil seal comprises an annular body and an annular oil groove arranged on the annular body.

[0014] Preferably, the joint shell is provided with a screw hole, and the joint seat is provided with a light hole, and a fixed connection is established between the joint shell and the joint seat through the cooperation between the screw and the screw hole and the light hole.

[0015] Preferably, a lubrication hole is also provided on the joint shell.

[0016] Beneficial technical effects: The high-speed and high-pressure rotary joint disclosed in the present application improves the stability of the joint shaft during rotation by adopting a joint shell and a joint seat to form a accommodating cavity and configuring multiple shaft body bearings and shaft tail bearings for the joint shaft in the accommodating cavity; by respectively configuring a shell end oil seal and a seat end oil seal at both ends of the joint shaft, the sealing effect of the joint shaft is improved, so that the high-speed and high-pressure rotary joint disclosed in the present application can be suitable for high-speed and high-pressure application environments, and solves the technical problem of oil leakage during the operation of the rotary joint.

[0017] The technical solution and technical effects of the present application are described in detail below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 : Stereoscopic view of high-speed and high-pressure rotary joint;

[0019] Figure 2 : Exploded view of high speed and high pressure rotary joint;

[0020] Figure 3 : High speed and high pressure rotary joint assembly drawing;

[0021] Figure 4 : High-speed and high-pressure rotary joint shell structure perspective view;

[0022] Figure 5 : High-speed and high-pressure rotary joint seat structure perspective view;

[0023] Icon Description:

[0024] 10-joint shell, 20-joint seat, 30-joint shaft, 40-shell end oil seal, 50-shaft body bearing, 60-seat end oil seal, 70-shaft tail bearing, 80-screw; 110-housing cavity, 120-housing shaft hole, 130-screw hole, 140-lubrication hole;

[0025] 210-seat body cavity, 220-seat body oil hole, 230-embedded section, 240-seat body section, 250-connecting section, 260-light hole;

[0026] 310-shaft inner oil channel, 320-connector, 330-shaft body section, 340-limiting section, 350-shaft tail section, 360-arc surface;

[0027] 1110-shell end oil seal part, 1120-shaft body bearing part, 1130-shaft seat embedding part;

[0028] 2110-seat end oil seal part, 2120-shaft tail bearing part, 2130-transition part;

[0029] 3210-connection slot;

[0030] 410-ring body, 420-ring oil groove;

[0031] 510-first shaft bearing, 520-second shaft bearing. DETAILED DESCRIPTION

[0032] See also Figure 1-Figure 5 The high-speed and high-pressure rotary joint disclosed in the present application includes a joint shell 10, a joint seat 20, a joint shaft 30, a shell end oil seal 40, a shaft body bearing 50, a seat end oil seal 60, a shaft tail bearing 70 and a screw 80.

[0033] The joint shell 10 is provided with a housing cavity 110, one end of the housing cavity 110 is open and the other end is closed, a housing shaft hole 120 is provided on the end surface of the closed end, and the housing shaft hole 120 passes through the housing cavity 110; a screw hole 130 is provided on the end surface of the open end, and the screw hole 130 is used to assemble the joint seat 20. The joint shell 10 is also provided with a lubrication hole 140 for supplying lubricating oil, and the lubrication hole 140 passes through the housing cavity 110.

[0034] The housing cavity 110 includes a housing end oil seal portion 1110, a shaft body bearing portion 1120, and a shaft seat embedding portion 1130 from the closed end to the open end. The housing end oil seal portion 1110 is used to assemble the housing end oil seal 40, the shaft body bearing portion 1120 is used to assemble the shaft body bearing 50, and the shaft seat embedding portion 1130 is used to accommodate and assemble the joint seat 20.

[0035] The joint seat 20 includes an embedding section 230, a seat body section 240, and a connecting section 250, which are integrally formed. The embedding section 230 is an open structure; the connecting section 250 protrudes from the seat body section 240 and is used to introduce high-pressure liquid oil to be transported. The embedding section 230 is used to be assembled into the shaft seat embedding portion 1130 of the housing cavity 110.

[0036] A seat body cavity 210 is provided in the joint seat 20, and the seat body cavity 210 includes a seat end oil seal portion 2110, a shaft tail bearing portion 2120, and a transition portion 2130 provided between the seat end oil seal portion 2110 and the shaft tail bearing portion 2120. The seat end oil seal portion 2110 is provided at the open end of the joint seat 20. A seat body oil hole 220 penetrating the joint seat 20 is provided on the joint seat 20, and both ends of the seat body oil hole 220 are opened at the end surface of the connecting section 250 and the cavity bottom of the shaft tail bearing portion 2120 of the seat body cavity 210, and can form a continuous oil path with the shaft inner oil passage 310 on the joint shaft 30. A light hole 260 for fixed assembly with the joint shell 10 is also provided on the seat body section 240 of the joint seat 20.

[0037] The assembly relationship between the joint shell 10 and the joint seat 20 is as follows: the embedded section 230 is assembled in the shaft seat embedded portion 1130 , and a fixed connection is established through the cooperation between the screw 80 and the screw hole 130 and the light hole 260 .

[0038] The joint shaft 30 is provided with an inner shaft oil passage 310 that penetrates the joint shaft 30. The joint shaft 30 includes a connector 320, a shaft body section 330, a stop section 340, and a shaft tail section 350 from the outside to the inside. The size of the stop section 340 is larger than that of the shaft body section 330 and the shaft tail section 350. A connection groove 3210 is provided on the connector 320. A curved surface 360 ​​is provided on one side of the stop section 340 close to the shaft tail section 350.

[0039] The connector 320 and its connecting groove 3210 are used to connect high-speed rotating equipment that requires high-pressure liquid oil. The shaft body section 330 is used to assemble the shaft body bearing 50, and the shaft tail section 350 is used to assemble the shaft tail bearing 70; the size of the limiting section 340 is larger than the size of the shaft body section 330 and the shaft tail section 350, which can limit the shaft body bearing 50 and the shaft tail bearing 70 to prevent the joint shaft 30 from sliding left and right.

[0040] The shell end oil seal 40 includes an annular body 410 and an annular oil groove 420 disposed on the annular body 410. The annular body 410 is used to form a sealing effect, and the annular oil groove 420 is used to store lubricating oil.

[0041] The shaft bearing 50 includes a first shaft bearing 510 and a second shaft bearing 520, and both the first shaft bearing 510 and the second shaft bearing 520 are disposed in the shaft bearing portion 1120 of the housing cavity 110. Using two shaft bearings in series can increase the support length of the bearing for the joint shaft 30 and increase the stability of the joint shaft 30 during operation.

[0042] The assembly relationship among the joint shaft 30, the housing oil seal 40, the first shaft body bearing 510, the second shaft body bearing 520, the seat end oil seal 60, and the shaft tail bearing 70 is as follows:

[0043] The joint shaft 30 is arranged in the shell cavity 110 and the seat cavity 210, one end with the connecting head 320 extends out of the shell shaft hole 120, and the other end is assembled in the shaft tail bearing part 2120 of the seat cavity 210; the oil channel 310 in the shaft is connected to the seat oil hole 220.

[0044] The shell end oil seal 40 is assembled in the shell end oil seal part 1110, the shaft body bearing 50 (including the first shaft body bearing 510 and the second shaft body bearing 520) is assembled in the shaft body bearing part 1120, the seat end oil seal 60 is assembled in the seat end oil seal part 2110, and the shaft tail bearing 70 is assembled in the shaft tail bearing part 2120 (the shaft tail section 350 of the joint shaft 30 is arranged in the shaft tail bearing 70).

[0045] The shell end oil seal 40, the shaft body bearing 50 (including the first shaft body bearing 510 and the second shaft body bearing 520), the seat end oil seal 60, and the shaft tail bearing 70 are sequentially arranged in the housing cavity 110 and / or the seat body cavity 210 and sleeved on the joint shaft 30. The shell end oil seal 40 and the shaft body bearing 50 (including the first shaft body bearing 510 and the second shaft body bearing 520) are sleeved on the shaft body section 330, the seat end oil seal 60 is sleeved on the limiting section 340, and the shaft tail bearing 70 is sleeved on the shaft tail section 350.

[0046] Implementation principle and effect: The high-speed high-pressure rotary joint disclosed in the present application is connected to the equipment that needs to deliver high-pressure liquid oil through the connector 320, and the joint shaft 30 is driven by the equipment that needs to supply oil to perform high-speed rotation together with the equipment. At the same time, the high-pressure liquid oil is fed from the seat body oil hole 220 to the shaft inner oil channel 310 of the connector 320, so that the high-pressure liquid oil can be delivered to the high-speed rotating equipment when the joint shaft 30 rotates at high speed. When the joint shaft 30 rotates at high speed, the first shaft body bearing 510, the second shaft body bearing 520, and the shaft tail bearing 70 can form a multi-point stable rotation support for the joint shaft 30 from the shaft body and the shaft tail, and can prevent the joint shaft 30 from moving left and right through the limiting cooperation between the limiting section 340 and the shaft body bearing 50 and the shaft tail bearing 70; at the same time, the shell end oil seal 40 and the seat end oil seal 60 respectively arranged at both ends of the joint shaft 30 can also effectively improve the sealing effect of the joint shaft, thereby improving the operation stability of the rotary joint and solving the technical problem of oil leakage during the operation of the rotary joint.

[0047] The technical scheme and technical effects of the present application are described in detail above in combination with the drawings and specific embodiments of the specification. It should be noted that technicians in this field can also develop other embodiments on this basis; any simple deformation and equivalent substitution that does not deviate from the innovative concept of the present application are covered by the present application and belong to the scope of protection of this patent.

Claims

1. A high-speed and high-pressure rotary joint, characterized in that: It comprises a joint shell (10), a joint seat (20), a joint shaft (30), a shell end oil seal (40), a shaft body bearing (50), a seat end oil seal (60), and a shaft tail bearing (70); The joint shell (10) is provided with a housing cavity (110) and a housing shaft hole (120), and the joint seat (20) is provided with a seat body cavity (210) and a seat body oil hole (220); The joint shell (10) and the joint seat (20) are fixedly connected, and the joint shaft (30) is arranged in the shell cavity (110) and the seat cavity (210) and extends out of the shell shaft hole (120); The shell end oil seal (40), the shaft body bearing (50), the seat end oil seal (60), and the shaft tail bearing (70) are sequentially arranged in the shell cavity (110) and / or the seat body cavity (210) and sleeved on the joint shaft (30); An inner shaft oil passage (310) is provided in the joint shaft (30), and the inner shaft oil passage (310) is connected to the seat body oil hole (220).

2. The high-speed and high-pressure rotary joint according to claim 1, characterized in that: The housing cavity (110) comprises a housing end oil seal portion (1110), a shaft body bearing portion (1120), and a shaft seat embedding portion (1130); The joint seat (20) comprises an embedding section (230) and a seat body section (240); The seat body cavity (210) comprises a seat end oil seal portion (2110) and a shaft tail bearing portion (2120); The seat body oil hole (220) is provided on the seat body section (240) and passes through the shaft tail bearing portion (2120) of the seat body cavity (210); The embedding section (230) is assembled in the shaft seat embedding portion (1130), the shell end oil seal (40) is assembled in the shell end oil seal portion (1110), the shaft body bearing (50) is assembled in the shaft body bearing portion (1120), the seat end oil seal (60) is assembled in the seat end oil seal portion (2110), and the shaft tail bearing (70) is assembled in the shaft tail bearing portion (2120); One end of the joint shaft (30) extends out of the housing shaft hole (120), and the other end of the joint shaft (30) is assembled in the shaft tail bearing portion (2120); the shaft inner oil passage (310) is connected to the seat body oil hole (220).

3. The high-speed and high-pressure rotary joint according to claim 2, characterized in that: The shaft body bearing (50) comprises a first shaft body bearing (510) and a second shaft body bearing (520); the first shaft body bearing (510) and the second shaft body bearing (520) are both arranged in a shaft body bearing portion (1120) of the housing cavity (110).

4. The high-speed and high-pressure rotary joint according to claim 2, characterized in that: The seat body cavity (210) further comprises a transition portion (2130), wherein the transition portion (2130) is arranged between the seat end oil seal portion (2110) and the shaft tail bearing portion (2120).

5. The high-speed and high-pressure rotary joint according to claim 2, characterized in that: The joint seat (20) further comprises a connecting section (250), wherein the connecting section (250) protrudes from the seat body section (240), and the seat body oil hole (220) passes through the connecting section (250).

6. The high-speed and high-pressure rotary joint according to claim 1, characterized in that: The joint shaft (30) comprises, from the outside to the inside, a connecting head (320), a shaft body section (330), a limiting section (340), and a shaft tail section (350); the size of the limiting section (340) is larger than the size of the shaft body section (330) and the shaft tail section (350); The connecting head (320) is arranged outside the housing cavity (110), the housing end oil seal (40) and the shaft body bearing (50) are sleeved on the shaft body section (330), the seat end oil seal (60) is sleeved on the limiting section (340), and the shaft tail bearing (70) is sleeved on the shaft tail section (350).

7. The high-speed and high-pressure rotary joint according to claim 6, characterized in that: A curved surface (360) is provided on one side of the limiting section (340) close to the shaft tail section (350).

8. The high-speed and high-pressure rotary joint according to claim 6, characterized in that: The connecting head (320) is provided with a connecting groove (3210).

9. The high-speed and high-pressure rotary joint according to claim 1, characterized in that: The shell end oil seal (40) comprises an annular body (410) and an annular oil groove (420) arranged on the annular body (410).

10. The high-speed and high-pressure rotary joint according to any one of claims 1 to 9, characterized in that: The joint shell (10) is provided with a screw hole (130), and the joint seat (20) is provided with a light hole (260); the joint shell (10) and the joint seat (20) are fixedly connected by the cooperation between the screw (80) and the screw hole (130) and the light hole (260).

Images