Novel high-pressure waterproof high-speed rotating joint
By using the bearing inner compensation ring and outer compensation ring in the high-speed rotary joint, combined with the composite maze structure and static and dynamic sealing ring, the problems of uneven bearing force and leakage of high-pressure fluid media are solved, and the effect of high-speed stable rotation and long life is achieved.
Patent Information
- Application Number
- CN202421314193.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-11
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2034-06-11
AI Technical Summary
The bearings of existing medium-pressure high-speed rotary joints are subjected to uneven axial stress, which leads to easy wear and high-pressure fluid media entering the bearing cavity, making the bearings easily scrapped, and the investment cost is high.
A new high-pressure waterproof high-speed rotary joint is designed, using an inner bearing compensation ring and an outer bearing compensation ring to reduce the tendency of the inner bearing ring to protrude by axial force and achieve high-speed and stable rotation. At the same time, through the cooperation of the composite maze-like sealing assembly and the static sealing ring and dynamic sealing ring, the high-pressure fluid medium is effectively isolated and the device weight and wear are reduced.
It effectively reduces the possibility of damage and scrapping of bearings, reduces input costs, and improves the service life and sealing effect of the device by optimizing the seal structure.
Smart Images
Figure CN222634080U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a high-speed rotary joint, in particular to a novel high-pressure waterproof high-speed rotary joint. Background Art
[0002] In the field of CNC machining, the axial force of the bearings of existing medium-pressure high-speed rotary joints is uneven. For example, in the medium-pressure high-speed rotary joint with application number CN201610565621.3, the first bearing and the second bearing are not coaxial in axial force on the inner ring and outer ring of the first bearing and the second bearing due to the elastic retaining rings of the holes on both sides and the elastic retaining rings of the first shaft, and all the assembled parts in the device are easily worn parts. Due to long-term operation, it is easy to cause wear of the parts inside the device, so that the transmitted high-pressure fluid medium enters the inner cavity of the bearing, and then causes the bearing to be stuck; in addition, because the inner ring and the outer ring of the two bearings are in a working state of uneven axial force for a long time, this leads to a gap between the two bearings. Therefore, as the eccentricity of high-speed rotation increases, it is easy to cause the high-speed rotary joint to be scrapped, thereby increasing the investment cost. Utility Model Content
[0003] In order to solve the problems in the related technology, the present application provides a new type of high-pressure waterproof high-speed rotary joint, which solves the problems of easy wear of the internal structure, easy entry of high-pressure fluid medium into the bearing cavity, easy scrapping of the bearing and high investment cost.
[0004] The technical solution is as follows:
[0005] A novel high-pressure, waterproof, high-speed rotary joint comprises a shell, a rotating shaft and a back cover, wherein a first bearing and a second bearing are fixedly sleeved on the outer periphery of the rotating shaft, and the first bearing and the second bearing are fixedly connected to the inner wall surface of the shell in an adaptable manner, so that one end of the rotating shaft is axially fixed and circumferentially rotatable in the shell; a first through hole is arranged along the length direction of the rotating shaft, and an "L"-shaped second through hole is arranged in the back cover, and the back cover is detachably installed in the shell at one end away from the first bearing, so that the second through hole and the horizontal part in the first through hole are connected; the characteristic is that an inner bearing compensation ring is fixedly arranged between the inner rings of the first bearing and the second bearing, and the inner bearing compensation ring is adapted to the rotating shaft, and the outer rings of the first bearing and the second bearing are connected. A bearing outer compensation ring is fixedly arranged between the bearings, and the bearing outer compensation ring is matched with the inner wall surface of the housing; a fixed sleeve on the rotating shaft is provided with a hole elastic retaining ring, a shaft elastic retaining ring, a spring washer and a first sealing component arranged in a composite labyrinth structure, the hole elastic retaining ring is arranged in the first bearing at a side elevation away from the second bearing, the shaft elastic retaining ring is arranged in the inner ring of the second bearing at a side elevation away from the first bearing, the spring washer is arranged in the outer ring of the second bearing at a side elevation away from the first bearing, the first sealing component is arranged in the spring washer at a side elevation away from the second bearing, and the outer periphery of the first sealing component is matched with the inner wall surface of the housing; the rotating shaft is fixedly connected to the rear cover through the second sealing component.
[0006] Through the above technical solution, through the arrangement of the inner compensation ring of the bearing and the outer compensation ring of the bearing, the inner compensation ring of the bearing forms a fixing effect on the inner rings of the first bearing and the second bearing, and the outer compensation ring of the bearing forms a fixing effect on the outer rings of the first bearing and the second bearing, thereby reducing the tendency of the inner rings of the first bearing and the second bearing to protrude to one side under the axial force, and realizing the high-speed and stable rotation of the first bearing and the second bearing without axial force, avoiding the excessive gap between the first bearing and the second bearing, thereby reducing the possibility of damage and scrapping of the first bearing and the second bearing, thereby reducing the investment cost;
[0007] In addition, by using the first sealing component arranged in a composite labyrinth structure, the weight of the device can be reduced while effectively isolating the high-pressure fluid medium.
[0008] Preferably, the second sealing assembly includes a static shaft and a compensation spring; a third through hole is provided along the axial direction of the static shaft, one end of the static shaft is adapted to be installed in the second through hole, so that the third through hole and the horizontal part of the second through hole are connected, and the other end of the static shaft is fixedly sleeved with a first fixing ring, a first strip-shaped notch is provided in the back cover, one end of the compensation spring is provided on the back cover in the first strip-shaped notch, and the other end of the compensation spring is in abutment with the side elevation of the first fixing ring; a first annular notch is provided at the end of the first fixing ring away from the static shaft, a static sealing ring is adapted to be installed in the first annular notch, a second annular notch corresponding to the position of the first annular notch is provided on the rotating shaft, a dynamic sealing ring is adapted to be installed in the second annular notch, and the side elevations of the static sealing ring and the dynamic sealing ring are in abutment with each other; there are gaps between the two side ends of the first fixing ring and the side elevations of the rotating shaft and the back cover.
[0009] Through the above technical scheme, by the connection between the static sealing ring and the dynamic sealing ring, the excess high-pressure fluid medium when being transported from the second through hole to the first through hole can be thrown out to avoid it from remaining in the inner cavity of the rotating shaft, thereby improving its service life; through the compensation spring set on the side surface of the first fixed ring, a gap is generated between the rotating shaft and the back cover due to wear. When a gap is generated between the static sealing ring and the dynamic sealing ring, the compensation spring rebounds and pushes the static sealing ring to make it rest against the side end surface of the dynamic sealing ring again, that is, the gap between the rotating shaft and the back cover is compensated by the compensation spring, thereby ensuring the close connection between the static sealing ring and the dynamic sealing ring, thereby ensuring the service life of the rotating shaft.
[0010] Preferably, the first sealing assembly includes a dynamic labyrinth ring and a static labyrinth ring; the dynamic labyrinth ring is arranged in an interference fit shape on the outer periphery of the rotating shaft, the dynamic labyrinth ring is arranged in a "U" shape, and the opening in the dynamic labyrinth ring faces the spring washer, and a gap is left between the side elevation of the dynamic labyrinth ring and the back cover; the static labyrinth ring includes a second fixing ring and a third fixing ring arranged in an integral shape, one end of the second fixing ring is arranged in the opening of the dynamic labyrinth ring, the third fixing ring is arranged at the other end of the second fixing ring, and the outer diameter of the third fixing ring is greater than the outer diameter of the second fixing ring, and the side elevation of the third fixing ring away from the second fixing ring is arranged on one side of the spring washer.
[0011] Through the above technical solution, the dynamic labyrinth ring and the static labyrinth ring are arranged in coordination, so that the leaked high-speed fluid medium can be effectively isolated to prevent the leaked high-speed fluid medium from entering the inner cavity of the bearing where the first bearing and the second bearing are located, thereby preventing the first bearing and the second bearing from getting stuck, thereby reducing the investment cost;
[0012] In addition, the static labyrinth ring can be combined with a spring washer to axially fix the outer ring of the second bearing, which can reduce the possibility of displacement of the second bearing and thus avoid the scrapping of the rotating shaft due to high-speed rotation and increased eccentricity, thereby reducing investment costs.
[0013] Preferably, a second strip-shaped notch is provided on the outer periphery of the first fixing ring, and a positioning elastic opening pin is provided in the second strip-shaped notch; a third strip-shaped notch corresponding to the position of the second strip-shaped notch is provided on the back cover, and the other end of the positioning elastic opening pin is adapted to be provided in the third strip-shaped notch.
[0014] Through the above technical solution, by setting the positioning elastic cotter pin, a fixing effect can be provided when the rotating shaft and the rear cover become loose due to wear, thereby ensuring the stability of the connection between the rotating shaft and the rear cover.
[0015] Preferably, fourth through holes are symmetrically arranged on the side elevation of the shell at the outer periphery of the dynamic labyrinth ring, and the axial direction of the fourth through hole is perpendicular to the axial direction of the first through hole and parallel to the axial direction of the vertical portion of the second through hole.
[0016] Through the above technical solution, through the symmetrically arranged fourth through holes, when in use, the fourth through hole on one side can be blocked, and the fourth through hole on the other side is in an unobstructed state. At this time, when the rotating shaft rotates at high speed, the overflowing high-pressure fluid medium will be thrown out from the fourth through hole in the unobstructed state, thereby preventing it from entering the inner cavity where the first bearing and the second bearing are located, reducing the possibility of damage to the first bearing and the second bearing, thereby extending the service life of the rotating shaft and reducing investment costs.
[0017] Preferably, the outer periphery of one end of the rotating shaft located outside the shell, the periphery of the inner wall surface of the inner compensation ring of the bearing, the outer periphery of one end of the static shaft away from the first bearing and the outer periphery of the rotating shaft on which the dynamic labyrinth ring is sleeved are respectively provided with a third annular notch, and connecting O-rings are provided in each of the four third annular notches.
[0018] Through the above technical scheme, by setting the connecting O-ring, since the end of the rotating shaft outside the shell is used to connect with the external equipment, the connecting O-ring set on the outer periphery of the rotating shaft can ensure the static seal between the two. Similarly, the connecting O-ring is installed on the compensation ring inside the bearing and the static shaft, which can ensure the airtightness of the connection between the compensation ring inside the bearing and the rotating shaft, the static shaft and the second through hole, thereby avoiding the overflow of high-pressure fluid medium during the high-speed rotation of the rotating shaft, ensuring the integrity of each component in the device, effectively improving the service life of the device, and thus reducing the investment cost.
[0019] In summary, the beneficial effects of a new type of high-pressure waterproof high-speed rotary joint are:
[0020] 1. By setting the inner compensation ring of the bearing and the outer compensation ring of the bearing, the inner compensation ring of the bearing forms a fixing effect on the inner rings of the first bearing and the second bearing, and the outer compensation ring of the bearing forms a fixing effect on the outer rings of the first bearing and the second bearing, thereby reducing the tendency of the inner rings of the first bearing and the second bearing to protrude to one side under the axial force, and realizing the high-speed and stable rotation of the first bearing and the second bearing without axial force, avoiding the excessive gap between the first bearing and the second bearing, thereby reducing the possibility of damage and scrapping of the first bearing and the second bearing, thereby reducing the investment cost; in addition, by the first sealing component arranged in a composite labyrinth structure, the weight of the device can be reduced while effectively isolating the high-pressure fluid medium;
[0021] 2. By setting the static sealing ring and the dynamic sealing ring in a connected state, the excess high-pressure fluid medium when being transported from the second through hole to the first through hole can be thrown out to avoid it from remaining in the inner cavity of the rotating shaft, thereby increasing its service life; by setting the compensation spring on the side elevation of the first fixed ring, a gap is generated between the rotating shaft and the back cover due to wear. When a gap is generated between the static sealing ring and the dynamic sealing ring, the compensation spring rebounds and pushes the static sealing ring to make it rest against the side end surface of the dynamic sealing ring again, that is, the gap between the rotating shaft and the back cover is compensated by the compensation spring, thereby ensuring the close connection between the static sealing ring and the dynamic sealing ring, thereby ensuring the service life of the rotating shaft;
[0022] 3. The coordinated arrangement of the dynamic labyrinth ring and the static labyrinth ring can effectively isolate the leaked high-speed fluid medium, and prevent it from entering the inner cavity of the bearing where the first bearing and the second bearing are located, thereby preventing the first bearing and the second bearing from getting stuck, thereby reducing the investment cost; in addition, the static labyrinth ring can be combined with the spring washer to axially fix the outer ring of the second bearing, thereby reducing the possibility of displacement of the second bearing, thereby avoiding the scrapping of the rotating shaft due to high-speed rotation and increased eccentricity, thereby reducing the investment cost;
[0023] 4. By setting the positioning elastic cotter pin, a fixing effect can be provided when the rotating shaft and the rear cover become loose due to wear, thereby ensuring the stability of the connection between the rotating shaft and the rear cover;
[0024] 5. Through the symmetrically arranged fourth through holes, when in use, the fourth through hole on one side can be blocked, and the fourth through hole on the other side is in a free state. At this time, when the rotating shaft rotates at a high speed, the overflowing high-pressure fluid medium will be thrown out from the free-flowing fourth through hole, thereby preventing it from entering the inner cavity where the first bearing and the second bearing are located, reducing the possibility of damage to the first bearing and the second bearing, thereby extending the service life of the rotating shaft and reducing the investment cost;
[0025] 6. By setting a connecting O-ring, since one end of the rotating shaft outside the shell is used to connect with external equipment, the connecting O-ring set on the outer periphery of the rotating shaft can ensure the static seal between the two. Similarly, the connecting O-ring is installed on the inner compensation ring of the bearing and the static shaft, which can ensure the airtightness of the connection between the inner compensation ring of the bearing and the rotating shaft, the static shaft and the second through hole, thereby avoiding the overflow of high-pressure fluid medium during the high-speed rotation of the rotating shaft, ensuring the integrity of each component in the device, effectively improving the service life of the device, and thus reducing the investment cost.
[0026] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] The accompanying drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present utility model, and together with the description, are used to explain the principles of the present utility model.
[0028] Figure 1 It is a structural schematic diagram of a new type of high-pressure waterproof high-speed rotary joint;
[0029] Figure 2 It is a top view of a new type of high-pressure waterproof high-speed rotary joint;
[0030] Figure 3 for Figure 2 Sectional view in the AA direction;
[0031] Figure 4 for Figure 3 A partial enlarged view of the label B;
[0032] Figure 5 It is a structural schematic diagram of a rotating shaft in a new type of high-pressure waterproof high-speed rotating joint;
[0033] In the figure, 1, housing; 2, rotating shaft; 3, back cover; 4, first bearing; 5, second bearing; 6, first through hole; 7, second through hole; 8, inner compensation ring of bearing; 9, outer compensation ring of bearing; 10, spring washer; 11, first sealing assembly; 1101, dynamic labyrinth ring; 1102, static labyrinth ring; 12, static shaft; 13, compensation spring; 14, third through hole; 15, first fixing ring; 16, static sealing ring; 17, dynamic sealing ring; 18, positioning elastic cotter pin; 19, fourth through hole; 20, connecting O-ring; 21, elastic retaining ring for hole; 22, elastic retaining ring for shaft. DETAILED DESCRIPTION
[0034] Here, exemplary embodiments will be described in detail, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the utility model. Instead, they are only examples of devices and methods consistent with some aspects of the utility model as detailed in the attached claims.
[0035] In a possible embodiment, as shown in the attached Figure 1-5 As shown, a novel high-pressure waterproof high-speed rotary joint comprises a housing 1, a rotating shaft 2 and a back cover 3. A first bearing 4 and a second bearing 5 are fixedly sleeved on the outer peripheral edge of the rotating shaft 2, and the first bearing 4 and the second bearing 5 are fixedly connected to the inner wall surface of the housing 1 in an adaptable manner, so that one end of the rotating shaft 2 is arranged in the housing 1 in an axially fixed and circumferentially rotatable manner; a first through hole 6 is arranged along the length direction of the rotating shaft 2, and an "L"-shaped second through hole 7 is arranged in the back cover 3. The back cover 3 is detachably installed in the housing 1 at one end away from the first bearing 4. In this embodiment, a plurality of threaded holes are arranged in the back cover 3, and a fastening bolt is arranged in each threaded hole to achieve connection with the housing 1, and the second through hole 7 is connected to the horizontal portion of the first through hole 6;
[0036] An inner bearing compensation ring 8 is fixedly arranged between the inner rings of the first bearing 4 and the second bearing 5, and the inner bearing compensation ring 8 is matched with the rotating shaft 2. An outer bearing compensation ring 9 is fixedly arranged between the outer rings of the first bearing 4 and the second bearing 5, and the outer bearing compensation ring 9 is matched with the inner wall surface of the housing 1.
[0037] The rotating shaft 2 is provided with a fixed sleeve with a hole elastic circlip 21, a shaft elastic circlip 22, a spring washer 10 and a first sealing assembly 11 arranged in a composite labyrinth structure. The hole elastic circlip 21 is arranged in the first bearing 4 on the side surface away from the second bearing 5, the shaft elastic circlip 22 is arranged in the second bearing 5 in the inner ring on the side surface away from the first bearing 4, the spring washer 10 is arranged in the second bearing 5 in the outer ring on the side surface away from the first bearing 4, the first sealing assembly 11 is arranged in the spring washer 10 on the side surface away from the second bearing 5, and the outer periphery of the first sealing assembly 11 is matched with the inner wall surface of the housing 1; the rotating shaft 2 passes through The second sealing component is fixedly connected to the rear cover 3; the first bearing 4 and the second bearing 5 do not generate axial force through the coordinated use of the inner bearing compensation ring 8 and the outer bearing compensation ring 9, so that when the first bearing 4 and the second bearing 5 rotate at high speed without axial force, the first bearing 4 and the second bearing 5 can rotate stably at high speed without axial force, avoiding excessive clearance between the first bearing 4 and the second bearing 5, thereby reducing the possibility of damage and scrapping of the first bearing 4 and the second bearing 5, and thus reducing the investment cost; the first sealing component 11 arranged in a composite labyrinth structure can reduce the weight of the device while effectively isolating the high-pressure fluid medium.
[0038] The second sealing assembly includes a static shaft 12 and a compensation spring 13; a third through hole 14 is provided along the axial direction of the static shaft 12, one end of the static shaft 12 is adapted to be installed in the second through hole 7, so that the third through hole 14 and the horizontal part of the second through hole 7 are in a connected state, the other end of the static shaft 12 is fixedly sleeved with a first fixing ring 15, a first strip-shaped notch is provided in the rear cover 3, one end of the compensation spring 13 is provided on the rear cover 3 in the first strip-shaped notch, and the other end of the compensation spring 13 is in abutment with the side elevation of the first fixing ring 15; a first annular notch is provided at one end of the first fixing ring 15 away from the static shaft 12, a static sealing ring 16 is adapted to be installed in the first annular notch, a second annular notch corresponding to the position of the first annular notch is provided on the rotating shaft 2, a dynamic sealing ring 17 is adapted to be installed in the second annular notch, and the side elevations of the static sealing ring 16 and the dynamic sealing ring 17 are in abutment with each other;
[0039] There are gaps between the two side ends of the first fixed ring 15 and the side elevations of the rotating shaft 2 and the rear cover 3; when a gap is generated between the rotating shaft 2 and the rear cover 3 due to wear, the compensation spring 13 pushes the static sealing ring 16 after rebounding, so that it rests against the side end surface of the dynamic sealing ring 17 again, that is, the gap between the rotating shaft 2 and the rear cover 3 is compensated by the compensation spring 13, ensuring the close connection between the static sealing ring 16 and the dynamic sealing ring 17, thereby extending the service life of the rotating shaft 2.
[0040] The first sealing assembly 11 includes a dynamic labyrinth ring 1101 and a static labyrinth ring 1102; the dynamic labyrinth ring 1101 is arranged in an interference fit on the outer periphery of the rotating shaft 2, the dynamic labyrinth ring 1101 is arranged in a "U" shape, and the opening in the dynamic labyrinth ring 1101 faces the spring washer, and a gap is left between the side elevation of the dynamic labyrinth ring 1101 and the back cover 3; the static labyrinth ring 1102 includes a second fixing ring and a third fixing ring arranged in an integral shape, one end of the second fixing ring is arranged in the opening in the dynamic labyrinth ring 1101, and the third fixing ring is arranged at the other end of the second fixing ring, and the outer diameter value of the third fixing ring is greater than the outer diameter value of the second fixing ring, and the side elevation of the third fixing ring away from the second fixing ring is arranged on one side of the spring washer; the cooperation of the dynamic labyrinth ring 1101 and the static labyrinth ring 1102 can effectively isolate the leaked high-speed fluid medium, and prevent it from entering the bearing inner cavity where the first bearing 4 and the second bearing 5 are located, causing the first bearing 4 and the second bearing 5 to be stuck, thereby reducing the investment cost;
[0041] The static labyrinth ring 1102 can be combined with a spring washer to axially fix the outer ring of the second bearing 5, which can reduce the possibility of displacement of the second bearing 5 and thus avoid the scrapping of the rotating shaft 2 due to high-speed rotation and increased eccentricity, thereby reducing investment costs.
[0042] A second strip-shaped notch is provided on the outer periphery of the first fixing ring 15, and a positioning elastic opening pin 18 is provided in the second strip-shaped notch; a third strip-shaped notch corresponding to the position of the second strip-shaped notch is provided on the back cover 3, and the other end of the positioning elastic opening pin 18 is adapted to be arranged in the third strip-shaped notch; the positioning elastic opening pin 18 can provide a fixing effect when the rotating shaft 2 and the back cover 3 become loose due to wear, thereby ensuring the stability of the connection between the rotating shaft 2 and the back cover 3.
[0043] A fourth through hole 19 is symmetrically arranged on the side elevation of the shell 1 at the outer periphery of the dynamic labyrinth ring 1101, and the axial direction of the fourth through hole 19 is perpendicular to the axial direction of the first through hole 6, and is parallel to the axial direction of the vertical portion of the second through hole 7; when in use, the fourth through hole 19 on one side can be blocked, and the fourth through hole 19 on the other side is in an unobstructed state. At this time, when the rotating shaft 12 rotates at high speed, the overflowing high-pressure fluid medium will be thrown out from the fourth through hole 19 in an unobstructed state, thereby preventing it from entering the inner cavity where the first bearing 4 and the second bearing 5 are located, reducing the possibility of damage to the first bearing 4 and the second bearing 5, thereby extending the service life of the rotating shaft 2 and reducing the investment cost.
[0044] The outer periphery of one end of the rotating shaft 2 located outside the shell 1, the inner wall periphery of the bearing inner compensation ring 8, the outer periphery of the end of the static shaft 12 away from the first bearing 4 and the outer periphery of the rotating shaft 2 sleeved with the dynamic labyrinth ring 1101 are respectively provided with a third annular notch, and a connecting O-ring 20 is provided in each of the four third annular notches; because the end of the rotating shaft 2 located outside the shell 1 is used to connect with external equipment, the connecting O-ring 20 provided on the outer periphery of the rotating shaft 2 can ensure the static seal between the two. Similarly, the connecting O-ring 20 is installed on the bearing inner compensation ring 8 and the static shaft 12, which can ensure the airtightness of the connection between the bearing inner compensation ring 8 and the rotating shaft 2, the static shaft 12 and the second through hole 7, thereby avoiding the overflow of high-pressure fluid medium during the high-speed rotation of the rotating shaft 2, ensuring the integrity of each component in the device, effectively improving the service life of the device, and thus reducing the investment cost.
[0045] Working principle: After the rotating shaft 2, the shell 1, the back cover 3 and the other parts in the shell 1 and the back cover 3 are assembled, a high-speed rotating joint device is obtained, and the end of the rotating shaft 2 located outside the shell 1 is connected to the external device. After the connection is completed, the high-pressure fluid medium begins to be transmitted. The high-pressure fluid medium enters the back cover 3 from the second through hole 7, and is transmitted to the external device after passing through the third through hole 14 and the first through hole 6; at this time, the rotating shaft 2 is in a high-speed rotating state. During the rotation of the rotating shaft 2, the inner rings of the first bearing 4 and the second bearing 5 will rotate synchronously, while the outer rings of the first bearing 4 and the second bearing 5 are in a stationary state. During the rotation of the first bearing 4 and the second bearing 5, the static labyrinth ring 1102 and the spring washer will play an axial fixing role on the second bearing 5. The inner compensation ring 8 and the outer compensation ring 9 of the bearing make the axial force of the first bearing 4 and the second bearing 5 disappear in the axial direction, thereby realizing high-speed and stable rotation; with the long-term high-speed rotation of the rotating shaft 2, a certain gap will be generated between the dynamic sealing ring 17 and the static sealing ring 16. At this time, the static sealing ring 16 is pushed by the rebound force of the compensation spring 13, so that it is pressed against the side surface of the dynamic sealing ring 17 again, thereby avoiding the leakage of the high-pressure fluid medium; due to the setting of the static labyrinth ring 1102 and the dynamic labyrinth ring 1101, the effect of static sealing can also be achieved; during the use of the device, the overflowed high-pressure fluid medium is thrown out from the first through hole 19 to avoid damage to the first bearing 4 and the second bearing 5 and other components, thereby reducing their wear rate.
[0046] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the present invention. This application is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not present in the present invention. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present invention are indicated by the appended claims.
[0047] It should be understood that the present invention is not limited to the precise structure described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.
Claims
1. A novel high-pressure waterproof high-speed rotary joint, comprising a shell, a rotating shaft and a back cover, wherein a first bearing and a second bearing are fixedly sleeved on the outer peripheral edge of the rotating shaft, and the first bearing and the second bearing are fixedly connected to the inner wall surface of the shell in an adaptable manner, so that one end of the rotating shaft is axially fixed and circumferentially rotatable in the shell; a first through hole is provided along the length direction of the rotating shaft, and an "L"-shaped second through hole is provided in the back cover, and the back cover is detachably installed in the shell at one end away from the first bearing, so that the second through hole and the horizontal part of the first through hole are connected; characterized in that An inner bearing compensation ring is fixedly arranged between the inner rings of the first bearing and the second bearing, and the inner bearing compensation ring is matched with the rotating shaft, and an outer bearing compensation ring is fixedly arranged between the outer rings of the first bearing and the second bearing, and the outer bearing compensation ring is matched with the inner wall surface of the housing; a fixed sleeve is provided with a hole elastic retaining ring, a shaft elastic retaining ring, a spring washer and a first sealing assembly arranged in a composite labyrinth structure, the hole elastic retaining ring is arranged in the first bearing on the side elevation away from the second bearing, the shaft elastic retaining ring is arranged in the inner ring of the second bearing on the side elevation away from the first bearing, the spring washer is arranged in the outer ring of the second bearing on the side elevation away from the first bearing, the first sealing assembly is arranged in the spring washer on the side elevation away from the second bearing, and the outer periphery of the first sealing assembly is matched with the inner wall surface of the housing; the rotating shaft is fixedly connected to the back cover through the second sealing assembly.
2. A novel high-pressure waterproof high-speed rotary joint according to claim 1, characterized in that: The second sealing assembly includes a static shaft and a compensation spring; a third through hole is provided along the axial direction of the static shaft, one end of the static shaft is adapted to be installed in the second through hole, so that the third through hole and the horizontal part of the second through hole are in a connected state, the other end of the static shaft is fixedly sleeved with a first fixing ring, a first strip-shaped notch is provided in the rear cover, one end of the compensation spring is provided on the rear cover in the first strip-shaped notch, and the other end of the compensation spring is in abutment with the side elevation of the first fixing ring; A first annular notch is provided at one end of the first fixing ring away from the static shaft, a static sealing ring is fitted in the first annular notch, a second annular notch corresponding to the position of the first annular notch is provided on the rotating shaft, a dynamic sealing ring is fitted in the second annular notch, and the side elevations of the static sealing ring and the dynamic sealing ring are in abutment with each other; Gaps are left between both side ends of the first fixing ring and the side elevations of the rotating shaft and the rear cover.
3. A novel high-pressure waterproof high-speed rotary joint according to claim 1, characterized in that: The first sealing assembly includes a dynamic labyrinth ring and a static labyrinth ring; the dynamic labyrinth ring is arranged in an interference fit on the outer periphery of the rotating shaft, the dynamic labyrinth ring is arranged in a "U" shape, and the opening in the dynamic labyrinth ring faces the spring washer, and a gap is left between the side elevation of the dynamic labyrinth ring and the rear cover; The static labyrinth ring includes a second fixing ring and a third fixing ring which are integrally formed, one end of the second fixing ring is arranged in an opening in the dynamic labyrinth ring, the third fixing ring is arranged at the other end of the second fixing ring, and the outer diameter of the third fixing ring is greater than the outer diameter of the second fixing ring, and the side elevation of the third fixing ring away from the second fixing ring is arranged on one side of the spring washer.
4. A novel high-pressure waterproof high-speed rotary joint according to claim 2, characterized in that: The outer periphery of the first fixing ring is provided with a second strip-shaped notch, and a positioning elastic cotter pin is provided in the second strip-shaped notch; The back cover is provided with a third strip-shaped notch corresponding to the position of the second strip-shaped notch, and the other end of the positioning elastic opening pin is adapted to be arranged in the third strip-shaped notch.
5. A novel high-pressure waterproof high-speed rotary joint according to claim 3, characterized in that: A fourth through hole is symmetrically arranged on the side elevation of the shell at the outer periphery of the dynamic labyrinth ring, and the axial direction of the fourth through hole is perpendicular to the axial direction of the first through hole and parallel to the axial direction of the vertical portion of the second through hole.
6. A novel high-pressure waterproof high-speed rotary joint according to claim 2, characterized in that: The outer periphery of one end of the rotating shaft located outside the shell, the periphery of the inner wall of the compensation ring in the bearing, the outer periphery of one end of the static shaft away from the first bearing, and the outer periphery of the rotating shaft with a dynamic labyrinth ring are respectively provided with third annular notches, and connecting O-rings are provided in each of the four third annular notches.
Citation Information
Patent Citations
Medium pressure high speed rotary joint
CN105953000B