CN115992913A - Rotary transmission joint - Google Patents
Rotary transmission joint Download PDFInfo
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- CN115992913A CN115992913A CN202310103255.XA CN202310103255A CN115992913A CN 115992913 A CN115992913 A CN 115992913A CN 202310103255 A CN202310103255 A CN 202310103255A CN 115992913 A CN115992913 A CN 115992913A
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- shell
- transmission joint
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Abstract
The invention discloses a rotary transmission joint, and belongs to the technical field of mechanical elements. The rotary transmission joint includes: the valve comprises a valve core, a shell body and a bearing assembly, wherein a plurality of annular channels are formed between the valve core and the shell body, the valve core is provided with a core channel communicated with the annular channels, the shell body is provided with a shell channel communicated with the annular channels, the number of the core channel, the number of the shell channel and the number of the annular channels are matched, the outer wall of the valve core is provided with a plurality of core stepped portions, the inner wall of the shell body is provided with a plurality of shell stepped portions, a core stepped portion and a shell stepped portion are arranged between every two adjacent annular channels, the axial surfaces of the core stepped portions and the shell stepped portions are propped against each other, and the bearing assembly is arranged at two ends of the valve core. The invention meets the sealing requirement of the annular channel in high-pressure operation, greatly reduces the axial dimension of the rotary transmission joint, and solves the problem that the rotary transmission joint in the prior art is difficult to install and use due to overlarge axial dimension.
Description
Technical Field
The invention belongs to the technical field of mechanical elements, and particularly relates to a rotary transmission joint.
Background
In application number: 201010555803.5, name: in the technical scheme disclosed in the prior patent publication of the rotary three-channel independent transmission joint, although the problem that water, gas, oil and other fluids can be transmitted in a mechanism of relative rotary motion without pipeline winding can be realized, the rotary three-channel independent transmission joint is structurally characterized in that an outer shell is sleeved on a valve core, in order to ensure smooth assembly, the inner diameter size of the outer shell is larger than the outer diameter size of the valve core in processing, namely, a gap is necessarily reserved between the outer shell and the valve core, and at least two sealing rings which are axially matched in parallel are necessarily arranged between adjacent annular grooves between the outer shell and the valve core to form two sealing rings so as to meet the sealing requirement of the annular channel in high-pressure working, and at least two sealing rings are arranged between two adjacent annular channels, so that the problem that the rotary transmission joint is excessively large in axial size and difficult to install and use is solved.
Disclosure of Invention
The invention aims to: a rotary transmission joint capable of reducing the axial dimension while satisfying the high-pressure operation requirement is provided.
The technical scheme of the invention is as follows: the rotary transmission joint includes: the valve core is sleeved on the outer shell outside the valve core, and the bearing assembly is arranged between the valve core and the outer shell.
A plurality of annular channels are formed between the valve core and the outer shell, the valve core is provided with a core channel communicated with the annular channels, the outer shell is provided with an outer shell channel communicated with the annular channels, and the number of the core channels, the number of the outer shell channels and the number of the annular channels are matched.
The outer wall of the valve core is provided with a plurality of core step parts, the inner wall of the outer shell is provided with a plurality of outer shell step parts, a core step part and an outer shell step part are arranged between every two adjacent annular channels, the axial surfaces of the core step parts and the outer shell step parts are propped against each other, and the annular channels are channels surrounded by the core step parts and the outer shell step parts.
The bearing assemblies are arranged at two ends of the valve core.
In a further embodiment, the spool has a spool land outside diameter at one end that is smaller than a spool land outside diameter at the other end.
The inner diameter of the stepped part of the outer shell at one end is larger than that of the stepped part of the outer shell at the other end, so that the outer shell can be sleeved outside the valve core.
In a further embodiment, the rotary transmission joint further comprises: and a seal ring disposed between the core step portion and the housing step portion.
The mounting groove is formed between the core step part and the shell step part, the sealing ring is arranged in the mounting groove, the defect of low machining precision is complemented by the sealing ring, and the sealing effect is ensured while the machining cost of the core step part and the shell step part is reduced.
In a further embodiment, the bearing assembly includes a first ball bearing disposed at one end of the spool, a second ball bearing disposed at the other end of the spool, and a stop disposed at the other end of the spool.
One end of the valve core is provided with a mounting step, the first ball bearing is arranged between the mounting step and the outer shell, and the second ball bearing is arranged between the outer shell and the stop piece, so that coaxiality of the valve core and the outer shell can be ensured, and the valve core and the outer shell can rotate relatively.
In a further embodiment, the bearing assembly further comprises a first thrust bearing disposed at one end of the spool and a second thrust bearing disposed at the other end of the spool.
The stop piece comprises a stop piece arranged at the other end of the valve core and a screw penetrating through the stop piece and connected with the valve core.
The first thrust bearing is arranged between the mounting step and the first ball bearing, and the second thrust bearing is arranged between the second ball bearing and the stop piece, so that the connection strength of the valve core and the outer shell can be ensured, and the sealing effect of the core step part and the outer shell step part is ensured.
In a further embodiment, the valve core is internally provided with a cavity, so that the weight of the rotary transmission joint can be further reduced, the installable space is increased, and the installation difficulty of the rotary transmission joint is reduced.
In a further embodiment, the sealing ring is a graphite sealing ring, so that the service life of the sealing ring can be prolonged, and the use and maintenance cost of the device can be reduced.
The beneficial effects of the invention are as follows: the axial face rigidity through core step portion and shell step portion offsets and need not reserve the clearance size in the face of offset, need reserve the clearance size with prior art and lead to having the gap between shell body and the case certainly and need set up at least two axial parallel complex sealing washer and form the sealed requirement when two adjacent ring channels can satisfy the ring channel high pressure work, only need set up a set of step seal structure between two adjacent annular channels and can satisfy the sealed requirement of annular channel high pressure work, greatly reduced rotary transmission joint's axial dimension, solved the too big difficult installation of rotary transmission joint axial dimension of prior art and used problem.
Drawings
Fig. 1 is a schematic overall cross-sectional view of the present invention.
Fig. 2 is an enlarged schematic view of a portion of fig. 1 at a.
The reference numerals shown in the figures are: the valve core 1, the outer housing 2, the annular channel 3, the bearing assembly 4, the stopper 5, the seal ring 6, the core channel 11, the outer housing channel 21, the first ball bearing 41, the second ball bearing 42, the first thrust bearing 43, the second thrust bearing 44, the stopper 51, and the screw 52.
Description of the embodiments
In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the invention may be practiced without one or more of these details. In other instances, well-known features have not been described in detail in order to avoid obscuring the invention.
The application discloses can satisfy rotation type transmission joint of high pressure work requirement when reducing axial dimensions.
The rotary transmission joint includes: the valve cartridge 1, the outer housing 2 and the bearing assembly 4.
The outer shell 2 is sleeved outside the valve core 1, a plurality of annular channels 3 are formed between the valve core 1 and the outer shell 2, and the bearing assembly 4 is arranged between the valve core 1 and the outer shell 2.
The two ends of the valve core 1 can be processed into a preset shape or the mounting holes can be processed according to the adapting mechanical element, the valve core 1 is provided with core channels 11 communicated with the annular channels 3, the number of the core channels 11 and the number of the annular channels 3 are matched, the outer wall of the valve core 1 is provided with a plurality of core stepped parts, in the further embodiment of the valve core 1, a cavity is formed in the valve core 1, as shown in the cross section of the embodiment of the cylindrical cavity in FIG. 1, the cavity can also be a cavity with a polygonal prism structure such as a cuboid cavity or a triangular prism, the shape of the cavity can also be processed into the preset shape according to the adapting mechanical element, the weight of the rotary transmission joint can be further reduced by forming the cavity, the mountable space is increased, and the mounting difficulty of the rotary transmission joint is reduced.
The outer shell 2 is of an inner wall cylindrical structure, the outer wall can be machined into a preset shape or a mounting hole is machined according to the adaptive mechanical element, the outer wall is integrally cylindrical as shown in fig. 1, the outer shell 2 is provided with outer shell channels 21 communicated with the annular channels 3, the outer shell channels 21 are matched with the annular channels 3 in number, and the inner wall of the outer shell 2 is provided with a plurality of outer shell step parts.
The number of the annular channels 3, the number of the core channels 11 and the number of the shell channels 21 can be one-to-one or one-to-many, and the number of the annular channels 3, the core step portions and the shell step portions comprise at least one annular channel 3, at least two core step portions and shell step portions, six annular channels 3, seven core step portions and seven shell step portions are arranged as shown in fig. 1, wherein the number of the annular channels 3, the core step portions and the shell step portions can be adjusted according to requirements.
Working principle: the axial surfaces of the core step part and the shell step part are rigidly propped against each other without reserving a gap size on the propped surfaces, so that the sizes of the two annular channels 3 in the axial direction can be connected as shown in fig. 1, the axial direction size of the rotary transmission joint is fully utilized, the sealing requirement of the annular channels 3 in high-pressure operation can be met only by arranging a group of step sealing structures between the two adjacent annular channels 3, and the axial size of the rotary transmission joint is greatly reduced.
In a further embodiment of the mating of the core step with the housing step shown in fig. 1, the core step outside diameter at one end of the valve spool 1 is smaller than the core step outside diameter at the other end.
The inner diameter of the step portion of the outer shell 2 is larger than that of the step portion of the outer shell at the other end.
The outer diameter of the stepped portion of the core is gradually decreased from one end to the other end, the inner diameter of the stepped portion of the shell is gradually increased from one end to the other end, the stepped portion of the core at the other end of the valve core 1 can be prevented from blocking the stepped portion of the shell at one end of the shell 2 in the process that the shell 2 is sleeved outside the valve core 1, and the shell 2 can be sleeved outside the valve core 1.
In a further embodiment of the core step and the housing step shown in fig. 2, the rotary transmission joint further comprises: and a seal ring 6 provided between the core step and the housing step.
A mounting groove is provided between the core step and the housing step, and the seal ring 6 is provided in the mounting groove, which is provided at the end of the core step as shown in fig. 2, and may be provided at the end of the housing step in other embodiments.
Can guarantee sealed effect when the surface precision of core step portion and shell step portion is lower through sealing washer 6, reach and complement machining precision effect for core step portion and shell step portion can process with lower precision, make the certain probability that has the gap to become after the low precision processing of prior art have the gap, complement the defect of low machining precision through sealing washer 6 again, guaranteed sealed effect when having reduced core step portion and shell step portion processing cost.
And the sealing ring 6 is arranged in the mounting groove, so that the sealing ring 6 does not occupy the axial dimension of the rotary transmission joint.
In this embodiment, the seal ring is a graphite seal ring.
The self-lubricating performance of the graphite sealing ring is good, the friction force between the graphite sealing ring and a moving part is small, and the graphite sealing ring has the advantages of wear resistance and high temperature resistance, so that the service life of the sealing ring can be prolonged, and the use and maintenance cost of the device can be reduced.
In a further embodiment of the bearing assembly 4 shown in fig. 1, the bearing assembly 4 comprises a first ball bearing 41 provided at one end of the spool 1, a second ball bearing 42 provided at the other end of the spool 1, and a stop 5 provided at the other end of the spool 1.
One end of the valve element 1 is provided with an installation step, a first ball bearing 41 is provided between the installation step and the outer housing 2, and a second ball bearing 42 is provided between the outer housing 2 and the stopper 5.
In the present embodiment, the stopper 5 may be a shaft retaining ring which is engaged with the other end of the valve element 1, or an annular stopper 51 which is connected to the other end of the valve element 1 by a screw 52.
The coaxiality of the valve core 1 and the outer housing 2 can be ensured through the first ball bearing 41 and the second ball bearing 42, and the two can rotate relatively.
In a further embodiment of the bearing assembly 4 shown in fig. 1, the bearing assembly 4 further comprises a first thrust bearing 43 arranged at one end of the spool 1 and a second thrust bearing 44 arranged at the other end of the spool 1.
The stopper 5 includes a stopper piece 51 provided at the other end of the valve body 1, and a screw 52 connected to the valve body 1 through the stopper piece 51.
A first thrust bearing 43 is provided between the mounting step and the first ball bearing 41, and a second thrust bearing 44 is provided between the second ball bearing 42 and the stopper 5. The axial precision of the valve core 1 and the outer shell 2 can be improved through the thrust bearing, and when high-pressure fluid is introduced into the annular channel 3, the connection strength of the valve core 1 and the outer shell 2 can be ensured, and the sealing effect of the step part of the valve core and the step part of the outer shell is ensured.
In this embodiment, the assembly method for the rotary transmission joint includes: s1. The first thrust bearing 43, the first ball bearing 41, the outer housing 2, the second ball bearing 42 and the second thrust bearing 44 are sequentially sleeved on the valve core 1, and when combined with the sealing ring 6 embodiment, the sealing ring 6 needs to be sleeved on the valve core 1 before the outer housing 2.
S2. The screw 52 is connected to the valve body 1 through the blocking piece 51, and the blocking piece 51 abuts against the second thrust bearing 44.
And S3, introducing fluid into the annular channel 3, testing the tightness of the valve body and the outer shell 2, simultaneously enabling the valve core 1 and the outer shell 2 to rotate relatively, and testing whether the rotation resistance meets the working requirement.
When the tightness of the valve body and the outer shell 2 meets the requirement and the rotation resistance is smaller than the resistance threshold, the assembly qualification of the rotary transmission joint is judged, and the valve body and the outer shell 2 are qualified pieces.
When the tightness of the valve body and the outer shell 2 meets the requirement, and the rotation resistance is greater than or equal to a resistance threshold, the screw 52 is moved in a direction away from the valve core 1, so that the tightness of the valve body and the outer shell 2 meets the requirement, and meanwhile, the rotation resistance is smaller than the resistance threshold, and at the moment, the assembly qualification of the rotary transmission joint is judged, and the valve body and the outer shell 2 are qualified pieces;
when the rotation resistance is smaller than the resistance threshold and the tightness of the valve body and the outer shell 2 is not in accordance with the requirement, the screw 52 is moved to the direction close to the valve core 1, so that the tightness of the valve body and the outer shell 2 is in accordance with the requirement and the rotation resistance is smaller than the resistance threshold, and at the moment, the assembly qualification of the rotary transmission joint is judged, and the valve body and the outer shell 2 are qualified pieces;
when the rotation resistance is smaller than or equal to or greater than the resistance threshold value after the screw 52 is adjusted and the tightness of the valve body and the outer housing 2 is not satisfactory, it is determined that the rotary transmission joint is unqualified for assembly and the valve body and the outer housing 2 are unqualified.
The distance that the valve core 1 is screwed in through the adjusting screw 52 can also be used for adjusting the offset force of the step part of the core and the step part of the shell, so that the valve core 1 and the outer shell 2 can be rotated relatively while the sealing effect of the step part of the core and the step part of the shell is guaranteed, and whether the valve body and the outer shell 2 are qualified in processing can be conveniently checked.
As described above, although the present invention has been shown and described with reference to certain preferred embodiments, it is not to be construed as limiting the invention itself. Various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. Rotary transmission joint, its characterized in that includes: the valve core is sleeved on the outer shell outside the valve core, and the bearing assembly is arranged between the valve core and the outer shell;
a plurality of annular channels are formed between the valve core and the outer shell, the valve core is provided with a core channel communicated with the annular channels, the outer shell is provided with an outer shell channel communicated with the annular channels, and the number of the core channels, the number of the outer shell channels and the number of the annular channels are matched;
the outer wall of the valve core is provided with a plurality of core step parts, the inner wall of the outer shell is provided with a plurality of shell step parts, a core step part and a shell step part are arranged between every two adjacent annular channels, the core step parts are abutted against the axial surfaces of the shell step parts, and the annular channels are channels surrounded by the core step parts and the shell step parts;
the bearing assemblies are arranged at two ends of the valve core.
2. The rotary transmission joint according to claim 1, wherein an outer diameter of the stepped portion of one end of the spool is smaller than an outer diameter of the stepped portion of the other end;
the inner diameter of the step part of the outer shell at one end of the outer shell is larger than that of the step part of the outer shell at the other end.
3. The rotary transmission joint of claim 1, further comprising: a seal ring disposed between the core step portion and the housing step portion;
and a mounting groove is formed between the core step part and the shell step part, and the sealing ring is arranged in the mounting groove.
4. The rotary transmission joint according to claim 1, wherein the bearing assembly comprises a first ball bearing provided at one end of the spool, a second ball bearing provided at the other end of the spool, and a stopper provided at the other end of the spool;
one end of the valve core is provided with an installation step, the first ball bearing is arranged between the installation step and the outer shell, and the second ball bearing is arranged between the outer shell and the stop piece.
5. The rotary transmission joint according to claim 4, wherein the bearing assembly further comprises a first thrust bearing disposed at one end of the spool and a second thrust bearing disposed at the other end of the spool;
the stop piece comprises a stop piece arranged at the other end of the valve core and a screw penetrating through the stop piece and connected with the valve core;
the first thrust bearing is arranged between the mounting step and the first ball bearing, and the second thrust bearing is arranged between the second ball bearing and the stop member.
6. The rotary transmission joint according to claim 1, wherein a cavity is formed in the valve core.
7. A rotary transfer joint as claimed in claim 3 wherein the seal is a graphite seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310103255.XA CN115992913A (en) | 2023-02-13 | 2023-02-13 | Rotary transmission joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310103255.XA CN115992913A (en) | 2023-02-13 | 2023-02-13 | Rotary transmission joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115992913A true CN115992913A (en) | 2023-04-21 |
Family
ID=85990200
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310103255.XA Pending CN115992913A (en) | 2023-02-13 | 2023-02-13 | Rotary transmission joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115992913A (en) |
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2023
- 2023-02-13 CN CN202310103255.XA patent/CN115992913A/en active Pending
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