CN211951794U - High airtight rotary joint - Google Patents
High airtight rotary joint Download PDFInfo
- Publication number
- CN211951794U CN211951794U CN202020621547.4U CN202020621547U CN211951794U CN 211951794 U CN211951794 U CN 211951794U CN 202020621547 U CN202020621547 U CN 202020621547U CN 211951794 U CN211951794 U CN 211951794U
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- ring baffle
- inner cylinder
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Abstract
The utility model relates to a high airtight type rotary joint includes axle inner tube, urceolus, magnetic current body, permanent magnet, O type circle baffle, enclosing cover, bearing arrangement. The shaft inner cylinder and the outer cylinder are supported and fixed by a bearing device, a flange on the outer cylinder is connected with a rotating pipe orifice on the fixing equipment, an O-shaped ring baffle and a permanent magnet which are fixed on the outer cylinder rotate along with the outer cylinder, and the outer cover is static along with the shaft inner cylinder in a concave disc on the flange of the outer cylinder. The magnetic fluid is filled in a sealing cavity among the O-shaped ring baffle on the shaft inner cylinder, the shaft inner cylinder and the permanent magnet. Under the action of the magnetic field of the permanent magnet, the magnetic fluid forms a radial magnetic linkage in a sealing cavity on the inner shaft cylinder, a groove on the inner shaft cylinder establishes a multi-stage magnetic fluid O-shaped sealing ring and combines with two O-shaped ring baffles to form a dynamic sealing community, and the aim of high-air-tightness sealing is fulfilled between the inner shaft cylinder and the outer cylinder.
Description
Technical Field
The utility model relates to a rotary joint specifically is a high airtight type rotary joint.
Background
The rotary joint on the market is a connection sealing part for entering and exiting fluid media (oil, gas and water) from a static pipeline into and out of rotary equipment, and the rotary joint needs to be installed between two pipelines which transport the media and rotate relatively, so that the rotary connection of the pipelines is realized. 1. The rotary joints are all sealed in the radial direction, the processing and assembling difficulty of the sealed cavity is high, the cost is high, the requirement on the smoothness of the surface is extremely high beyond the strict requirement on the processing size, the sealing piece and the rotating shaft are easy to collide, and the shaft holding phenomenon and the like are caused. 2. The sealing of the rotary joint is mostly of a rigid sealing structure, so that the sealing element of the rotary joint is easy to wear in the operation process, the gap between the inner barrel and the sealing element is enlarged, the phenomena of leakage, seepage and the like occur, and the sealing effect is influenced. 3. When the abrasion of the sealing element inside the rotary joint is excessive, the friction coefficient value of the rotation of the rotary joint is increased, so that the high airtight sealing performance of the rotary joint is reduced, and the service life of the rotary joint is shortened.
SUMMERY OF THE UTILITY MODEL
The to-be-solved problem of the utility model is to overcome not enough that current rotary joint exists, provide a high airtight type rotary joint.
In order to achieve the above purpose, the present invention is realized by the following technical solutions: a high-air-tightness rotary joint comprises an inner shaft cylinder, an outer cylinder, a magnetic fluid, a permanent magnet, an O-shaped ring baffle, an outer cover, a bearing device and a screw.
One end of the shaft inner cylinder is provided with a flange. The flange on the shaft inner cylinder is used for connecting a rotating or static pipe orifice on the fixed equipment, and the rotating or static pipe orifice is used for matching with medium conveying when the equipment moves.
A flange is arranged at one end of the outer cylinder, and a concave disc for installing an outer cover is reserved at the flange end of the outer cylinder. The thickness of the outer cover is smaller than the groove depth of the concave disc, and the surface of the outer cover installed in the concave disc is lower than the surface of the flange.
The flange on the outer cylinder is used for connecting a static or rotary nozzle on the fixed equipment, and the static or rotary nozzle is used for matching with medium conveying when the equipment moves.
The outer cylinder is made of a non-magnetic material. For example: plastic, aluminum, copper, resin, and other non-magnetic materials.
The O-shaped ring baffle is made of non-magnetic sealing materials, such as: non-magnetic conductive sealing materials such as graphite, polytetrafluoroethylene, rubber, ceramics and the like.
The shaft inner cylinder is made of a magnetic conductive material, and the magnetic fluid can be fixed by the shaft inner cylinder made of the magnetic conductive material, and the magnetic field intensity in the seal gap is increased.
The cylinder body in the cylinder at the middle position of the shaft inner cylinder is provided with a groove.
The permanent magnet is fixed in the concave strip in the outer cylinder and is made of neodymium iron boron materials. The magnetizing direction of the permanent magnet is selected according to the requirement. The magnetizing direction of the permanent magnet can be radial magnetizing, the inner part is an N pole, and the outer part is an S pole.
The inner diameter of the O-shaped ring baffle is the same as the outer diameter of the shaft inner cylinder, and the outer diameter of the O-shaped ring baffle is the same as the inner diameter of the outer cylinder.
The plate thickness of the O-shaped ring baffle is 0.2-5 mm, and the length of the O-shaped ring baffle is 5-38 mm.
The surface of the O-shaped ring baffle is provided with a concave hole. The outer surface of the O-shaped ring baffle fixed on the shaft inner cylinder is provided with a concave hole, and the inner surface of the O-shaped ring baffle fixed on the outer cylinder is provided with a concave hole.
The shape of the concave hole is round, square or long strip.
The concave hole on the O-shaped ring baffle forms a labyrinth seal. The hole area of the concave hole accounts for 30-95% of the surface area of the O-shaped ring baffle, and the function that fluid generates resistance through the labyrinth concave hole and reduces the flow is called as labyrinth effect.
The O-shaped ring baffle is sleeved on the shaft inner cylinder. The O-shaped ring baffle is tightly attached to the shaft inner cylinder, and the O-shaped ring baffle and the shaft inner cylinder are not fixed together.
The O-shaped ring baffle plays a role in sealing the inner cylinder and the outer cylinder of the shaft, plays a role in fixedly connecting the inner cylinder and the outer cylinder of the support shaft and also plays a role in non-magnetic conduction. The O-shaped ring baffle is sleeved on the shaft inner cylinder, the O-shaped ring baffle, the shaft inner cylinder and the permanent magnet form a sealed cavity, and the magnetic fluid performs magnetic sealing work in the closed sealed cavity.
The O-shaped ring baffle is fixed on the inner wall of the outer cylinder through screws or fixing glue or embedded on the cylinder body of the shaft inner cylinder; the O-shaped ring baffle and the outer cylinder or the shaft inner cylinder are fixedly sealed into a whole.
1. After the screw penetrates through the hole in the outer barrel, the O-shaped ring baffle is filled, and the screw fixes the O-shaped ring baffle on the outer barrel.
2. After the fixing glue penetrates through the hole in the outer barrel, the fixing glue is filled between the O-shaped ring baffle and the inner wall of the outer barrel, and the O-shaped ring baffle is fixed on the outer barrel through the fixing glue.
3. The fixing glue is filled between the O-shaped ring baffle and the cylinder body of the shaft inner cylinder, and the O-shaped ring baffle is fixed on the cylinder body of the shaft inner cylinder by the fixing glue. When the O-shaped ring baffle is fixed on the shaft inner cylinder, no hole is formed on the outer cylinder.
The shaft inner cylinder is arranged in the outer cylinder, and one end of the shaft inner cylinder without the flange is inserted into the outer cylinder from one end of the outer cylinder without the flange.
The bearing device is arranged between the shaft inner cylinder and the shaft outer cylinder, and the shaft inner cylinder and the shaft outer cylinder are supported and fixed by the bearing device. The two ends of the shaft inner cylinder and the outer cylinder are supported and fixed by a bearing device.
The magnetic fluid is arranged in a sealing cavity among the O-shaped ring baffle on the shaft inner cylinder, the shaft inner cylinder and the permanent magnet. The magnetic fluid is filled in the seal cavity between the permanent magnet and the shaft inner cylinder and the groove of the shaft inner cylinder to enhance the seal, and the magnetic fluid is held in the seal cavity between the permanent magnet and the shaft inner cylinder by the magnetic field generated around the permanent magnet.
The magnetic fluid can form a fluid with a uniform structure and the characteristic of flowing liquid under the action of the magnetic field of the permanent magnet, a radial magnetic linkage is formed in a closed-loop sealing cavity on the shaft inner cylinder, the magnetic fluid has certain yield stress and can bear certain axial air pressure (hydraulic pressure), and a multi-stage magnetic fluid O-shaped sealing ring is established in the sealing cavity to achieve the purpose of high-air-tightness sealing.
The utility model discloses high airtight type rotary joint's preparation method of processing is as follows: for clarity of presentation, the bearing arrangement is divided into a first bearing arrangement and a second bearing arrangement; the O-shaped ring baffle is divided into a first O-shaped ring baffle and a second O-shaped ring baffle.
The permanent magnet is fixed in a cylinder inner concave strip of the outer cylinder, and a bearing of the first bearing device is fixedly arranged on a shaft inner cylinder with a flange end of the shaft inner cylinder.
And step two, fixedly mounting the cylinder body without the flange end of the outer cylinder on a bearing seat of a first bearing device on the shaft inner cylinder. The end without the flange of the inner shaft cylinder is inserted into the outer cylinder from the end without the flange of the outer cylinder, and the connecting end of the inner shaft cylinder and the outer cylinder is supported and fixed by a first bearing device.
And step three, sleeving the first O-shaped ring baffle on the shaft inner cylinder, and pressing and pushing the first O-shaped ring baffle to move to the first bearing device on the shaft inner cylinder. After the first O-shaped ring baffle plate is attached to the first bearing device, a screw penetrates through a hole in the outer barrel and is inserted into a screw hole in the first O-shaped ring baffle plate, the first O-shaped ring baffle plate is fixed on the outer barrel through the screw, and the first O-shaped ring baffle plate and the outer barrel are fixed and sealed into a whole.
And step four, filling the magnetic fluid in a sealing cavity among the first O-shaped ring baffle on the shaft inner cylinder, the shaft inner cylinder and the permanent magnet. A magnetic fluid is filled in a seal cavity between the permanent magnet and the shaft inner cylinder to enhance a hermetic seal, the magnetic fluid being held in the seal cavity between the outer cylinder and the shaft inner cylinder by a magnetic field generated around the magnet.
The O-shaped ring baffle is sleeved on the shaft inner cylinder, and a sealing cavity is formed among the O-shaped ring baffle, the shaft inner cylinder and the permanent magnet. The magnetic fluid is filled in a sealing cavity among the O-shaped ring baffle, the permanent magnet and the groove of the shaft inner cylinder, and the magnetic fluid is kept between the outer cylinder and the shaft inner cylinder through a magnetic field generated around the permanent magnet to perform high-airtight type sealing work.
And step five, sleeving a second O-shaped ring baffle on the shaft inner cylinder, and pressing and pushing the second O-shaped ring baffle to move to the magnetic fluid on the shaft inner cylinder. After the first O-shaped ring baffle is attached to the magnetic fluid, a screw penetrates through a hole in the outer barrel and is inserted into a screw hole in the second O-shaped ring baffle, the second O-shaped ring baffle is fixed on the outer barrel through the screw, and the second O-shaped ring baffle and the outer barrel are fixedly sealed into a whole.
And step six, sleeving a bearing of the second bearing device on the inner shaft cylinder, pressing and pushing the second bearing device to move to a second O-shaped ring baffle on the inner shaft cylinder, installing and fixing the bearing of the second bearing device on the inner shaft cylinder, and fixedly installing a bearing seat of the second bearing device on the outer cylinder body. The connecting ends of the inner shaft cylinder and the outer shaft cylinder are supported and fixed by a second bearing device.
And step seven, after the outer cover is pressed and attached in the concave disc at the flange end of the outer cylinder, the outer cover is fixedly arranged on the shaft inner cylinder. The outer cover and the outer cylinder are separated, the outer cover and the shaft inner cylinder are fixed into a whole, the outer cover supports and fixes the corresponding positions of the shaft inner cylinder and the shaft inner cylinder, movement dislocation cannot be generated, and the phenomenon that the shaft inner cylinder withdraws from the outer cylinder under the action of external force to cause damage to the high-airtight rotary joint and incapability of use is avoided.
The utility model discloses high airtight type rotary joint's application method as follows:
the flange on the outer cylinder is connected with a static pipe orifice on the fixing equipment, and the O-shaped ring baffle and the permanent magnet which are fixed on the outer cylinder are static along with the outer cylinder. The flange on the shaft inner cylinder is connected to a rotating pipe orifice on the fixing equipment, and the outer cover fixed on the shaft inner cylinder and the shaft inner cylinder rotate together along with the rotating pipe orifice; the surface of an outer cover mounted in a concave disk on the flange of the outer cylinder is lower than the surface of the flange, and the outer cover rotates together with the inner cylinder of the shaft in the concave disk on the flange of the outer cylinder. The shaft inner cylinder and the shaft outer cylinder are supported and fixed by a bearing device.
And secondly, a flange on the outer cylinder is connected with a rotary pipe orifice on the fixing equipment, and an O-shaped ring baffle and a permanent magnet which are fixed on the outer cylinder rotate together with the outer cylinder. The dimples on the O-ring baffle form a 'labyrinth seal'. The flange on the shaft inner cylinder is connected to a static pipe orifice on the fixing equipment, the surface of an outer cover in a concave disc arranged on the flange of the outer cylinder is lower than the surface of the flange, the outer cover is static along with the shaft inner cylinder in the concave disc on the flange of the outer cylinder, and the shaft inner cylinder and the outer cylinder are supported and fixed by a bearing device.
The magnetic fluid can form fluid with uniform structure and the characteristic of flowing liquid under the action of the magnetic field of the permanent magnet, the magnetic fluid forms a radial magnetic linkage in a closed-loop sealing cavity on the inner shaft cylinder, has certain yield stress and can bear certain axial air pressure (hydraulic pressure), and a multi-stage magnetic fluid O-shaped sealing ring is established between grooves of the inner shaft cylinder.
And fourthly, a groove of the shaft inner cylinder in the sealed cavity is provided with a multi-stage magnetic fluid O-shaped sealing ring, and the fluid generates resistance through the multi-stage magnetic fluid O-shaped sealing ring and has a function of reducing the flow rate, namely a labyrinth effect.
Grooves on the inner shaft cylinder establish a multi-stage magnetic fluid O-shaped sealing ring and two O-shaped ring baffles to form a dynamic sealing device of a community, and the aim of high-air-tightness sealing between the inner shaft cylinder and the outer cylinder is fulfilled.
The magnetic fluid is liquid and has no abrasion to other mechanical parts in the sealed cavity, the technical requirements on the jumping, eccentricity and roughness of the inner cylinder of the shaft are low, the sealing performance is strong, dry friction is avoided, the lubricating effect is good, and the like. Has no special requirement on environment, and can be used for dust prevention, pressure difference and vacuum sealing. The sealing device is suitable for sealing application of various auxiliary machines such as steam turbines, generators, vacuum dryers and the like in industrial departments, and is simple in overall structure, low in manufacturing cost and convenient to popularize.
The utility model discloses compare with current sealing device joint and have following beneficial effect: a high-air-tightness rotary joint comprises an inner shaft cylinder, an outer cylinder, a magnetic fluid, a permanent magnet, an O-shaped ring baffle, an outer cover and a bearing device. The shaft inner cylinder and the outer cylinder are supported and fixed by a bearing device, a flange on the outer cylinder is connected with a rotating pipe orifice on the fixing equipment, an O-shaped ring baffle and a permanent magnet which are fixed on the outer cylinder rotate along with the outer cylinder, and the outer cover is static along with the shaft inner cylinder in a concave disc on the flange of the outer cylinder. The magnetic fluid is filled in a sealing cavity among the O-shaped ring baffle on the shaft inner cylinder, the shaft inner cylinder and the permanent magnet. Under the action of the magnetic field of the permanent magnet, the magnetic fluid forms a radial magnetic linkage in a sealing cavity on the shaft inner cylinder, a groove on the shaft inner cylinder establishes a multi-stage magnetic fluid O-shaped sealing ring and two O-shaped ring baffles to form a dynamic sealing device of a common body, and the aim of high-air-tightness sealing between the shaft inner cylinder and the outer cylinder is fulfilled.
Description of the drawings:
fig. 1 is a schematic structural view of a high airtight rotary joint of the present invention;
fig. 2 is a schematic structural diagram of the O-ring baffle of the high airtight rotary joint of the present invention.
In the figure: 1. the shaft comprises a shaft inner cylinder, 2, an outer cylinder, 3, a magnetic fluid, 4, a permanent magnet, 5, an O-shaped ring baffle, 6, an outer cover, 7, a fixed end, 8, a bearing, 9, a flange, 10, a screw, 11, a groove, 12 and a concave hole.
The specific implementation mode is as follows:
the present invention will be further described with reference to the accompanying drawings and examples.
Example 1:
as shown in fig. 1 and 2, the high airtight type rotary joint includes a shaft inner cylinder 1, an outer cylinder 2, a magnetic fluid 3, a permanent magnet 4, an O-ring baffle 5, an outer cover 6, a bearing device 8, and a screw 10.
One end of the shaft inner cylinder 1 is provided with a flange 9, one end of the outer cylinder 2 is provided with a flange 9, and a concave disc for installing the outer cover 6 is reserved on the flange 9 of the outer cylinder 2.
The outer cylinder 2 is made of non-magnetic conductive material aluminum.
The O-shaped ring baffle 5 is made of polytetrafluoroethylene.
The shaft inner cylinder 1 is made of a magnetic conductive material, and a groove 11 is formed in the cylinder body of the shaft inner cylinder 1.
The permanent magnet 4 is fixed in a concave strip in the outer cylinder 2. .
The inner diameter of the O-shaped ring baffle 5 is the same as the outer diameter of the shaft inner cylinder 1, and the outer diameter of the O-shaped ring baffle 5 is the same as the inner diameter of the outer cylinder 2.
The plate thickness of the O-shaped ring baffle 5 is 2mm, and the length of the O-shaped ring baffle 5 is 18 mm.
The O-shaped ring baffle 5 is sleeved on the shaft inner cylinder 1, the O-shaped ring baffle 5 is tightly attached to the shaft inner cylinder 1, and the O-shaped ring baffle 5 and the shaft inner cylinder 1 are not fixed together.
The surface of the O-shaped ring baffle 5 is provided with a concave hole 12, and the shape of the concave hole 12 is circular.
The inner surface of the O-shaped ring baffle 5 fixed on the outer cylinder is provided with a concave hole 12; the hole area of the concave hole 12 accounts for 50% of the inner surface area of the O-ring baffle 5, and the concave hole 12 on the O-ring baffle 5 forms a labyrinth seal.
The O-shaped ring baffle 5 plays a role in sealing and also plays a role in non-magnetic conduction. The O-shaped ring baffle 5 is sleeved on the shaft inner cylinder 1, the O-shaped ring baffle 5, the shaft inner cylinder 1 and the permanent magnet 4 form a sealed cavity, and the magnetic fluid 3 performs magnetic sealing work in the sealed cavity.
The O-shaped ring baffle 5 is fixed on the inner wall of the outer cylinder 2. After the screw 10 penetrates through the hole in the outer barrel 2, the screw 10 is inserted into the hole of the screw 10 in the O-shaped ring baffle 5, the O-shaped ring baffle 5 is fixed on the outer barrel 2 through the screw 10, and the O-shaped ring baffle 5 and the outer barrel 2 are fixed and sealed into a whole.
The shaft inner cylinder 1 is arranged in the outer cylinder 2, and one end of the shaft inner cylinder 1 without the flange 9 is inserted into the outer cylinder 2 from one end of the outer cylinder 2 without the flange 9. The shaft inner cylinder 1 and the shaft outer cylinder 2 are supported and fixed by a bearing device 8; the two ends of the shaft inner cylinder 1 and the shaft outer cylinder 2 are supported and fixed by a bearing device 8.
A sealed cavity is formed among the O-shaped ring baffle 5, the shaft inner cylinder 1 and the permanent magnet 4; the magnetic fluid 3 is filled in a sealing cavity between the O-shaped ring baffle 5, the permanent magnet 4 and the shaft inner cylinder 1, and a multi-stage magnetic fluid O-shaped sealing ring is established between the grooves 11 of the shaft inner cylinder 1. The magnetic fluid 3 is held between the outer cylinder 2 and the shaft inner cylinder 1 by a magnetic field generated around the permanent magnet 4 to perform a high airtight type sealing operation.
The utility model discloses high airtight type rotary joint's preparation method of processing is as follows:
firstly, the permanent magnet 4 is fixed in a cylinder inner concave strip of the outer cylinder 2, and a bearing of the first bearing device 8 is fixedly arranged on the shaft inner cylinder 1 at the end, with the flange 9, of the shaft inner cylinder 1.
And step two, a cylinder body of the outer cylinder 2 without the flange 9 end is fixedly arranged on a bearing seat of the first bearing device 8 on the shaft inner cylinder 1. The end of the shaft inner cylinder 1 without the flange 9 is inserted into the outer cylinder 2 from the end of the outer cylinder 2 without the flange 9, and the connecting end between the shaft inner cylinder 1 and the outer cylinder 2 is supported and fixed by a first bearing device 8.
And step three, sleeving the first O-shaped ring baffle 5 on the shaft inner cylinder 1, and pushing the first O-shaped ring baffle 5 to move to the first bearing device 8 on the shaft inner cylinder 1. After the first O-shaped ring baffle 5 is attached to the first bearing device 8, the screw 10 penetrates through a hole in the outer barrel 2 and is inserted into the hole 10 in the first O-shaped ring baffle 5, the first O-shaped ring baffle 5 is fixed on the outer barrel 2 through the screw 10, and the first O-shaped ring baffle 5 and the outer barrel 2 are fixedly sealed into a whole.
And step four, the magnetic fluid 3 is filled in a sealing cavity formed among the first O-shaped ring baffle 5 on the shaft inner cylinder 1, the shaft inner cylinder 1 and the permanent magnet 4. The magnetic fluid 3 is filled in the seal cavity between the permanent magnet 4 and the shaft inner cylinder 1 to enhance the seal, and the magnetic fluid 3 is held in the seal cavity between the outer cylinder 2 and the shaft inner cylinder 1 by the magnetic field generated around the magnet.
And step five, sleeving the second O-shaped ring baffle 5 on the shaft inner cylinder 1, and pressing and pushing the second O-shaped ring baffle 5 to move to the magnetic fluid 3 on the shaft inner cylinder 1. After the second O-shaped ring baffle 5 is attached to the magnetic fluid 3, the screw 10 penetrates through the hole in the outer barrel 2 and is inserted into the hole of the screw 10 in the second O-shaped ring baffle 5, the second O-shaped ring baffle 5 is fixed on the outer barrel 2 through the screw 10, and the second O-shaped ring baffle 5 and the outer barrel 2 are fixedly sealed into a whole.
And step six, sleeving a bearing of the second bearing device 8 on the shaft inner cylinder 1. After the second bearing device 8 is pushed to move to the second O-shaped ring baffle 5 on the inner shaft cylinder 1, the bearing of the second bearing device 8 is fixedly arranged on the cylinder of the inner shaft cylinder 1, and the cylinder of the outer cylinder 2 is fixedly arranged on the bearing seat of the second bearing device 8. The connecting end between the shaft inner cylinder 1 and the shaft outer cylinder 2 is supported and fixed by a second bearing device 8.
And seventhly, pressing the outer cover 6 into a concave disc at the flange 9 end of the outer cylinder 2, and then fixedly mounting the outer cover 6 on the shaft inner cylinder 1. The outer cover 6 and the outer cylinder 2 are separated, the outer cover 6 and the shaft inner cylinder 1 are fixed into a whole, the outer cover 6 supports and fixes the corresponding positions of the shaft inner cylinder 1 and the shaft inner cylinder 2, movement dislocation cannot be generated, and the phenomenon that the shaft inner cylinder 1 is withdrawn from the outer cylinder 2 under the action of external force to cause damage to a high-airtight rotary joint and incapability of use is avoided.
The utility model discloses high airtight type rotary joint's application method as follows:
firstly, a flange 9 on the outer cylinder 2 of a fixed end 7 of the high-airtight type rotary joint is connected with a static pipe orifice on a fixing device, and an O-shaped ring baffle 5 and a permanent magnet 4 which are fixed on the outer cylinder are static along with the outer cylinder 2. The flange 9 on the shaft inner cylinder 1 is connected to a rotating pipe orifice on the fixing equipment, and the outer cover 6 fixed on the shaft inner cylinder 1 and the shaft inner cylinder 1 rotate along with the rotating pipe orifice.
The magnetic fluid 3 forms a radial magnetic linkage in a closed-loop sealing cavity on the shaft inner cylinder 1, the groove 11 establishes a multi-stage magnetic fluid O-shaped sealing ring and two O-shaped ring baffles 5 to form a dynamic sealing device of a community, and the aim of high-air-tightness sealing is fulfilled between the shaft inner cylinder 1 and the outer cylinder 2.
Example 2:
as shown in fig. 1 and 2, the high airtight rotary joint includes a shaft inner cylinder 1, an outer cylinder 2, a magnetic fluid 3, a permanent magnet 4, an O-ring baffle 5, an outer cover 6, and a bearing device 8.
The same points of the combination structure of the high airtight type rotary joint of the present embodiment 2 and the high airtight type rotary joint described in embodiment 1 will not be described again.
The utility model discloses high airtight type rotary joint's preparation method of processing is as follows:
the first O-shaped ring baffle 5 is sleeved on the shaft inner cylinder 1, and the first O-shaped ring baffle 5 is pushed to move to the first bearing device 8 on the shaft inner cylinder 1. After the first O-shaped ring baffle 5 is attached to the first bearing device 8 and the fixing glue penetrates through the hole in the outer barrel 2, the fixing glue is filled between the first O-shaped ring baffle 5 and the inner wall of the outer barrel 2, and the first O-shaped ring baffle 5 is fixed on the outer barrel 2 by the fixing glue.
And sleeving the second O-shaped ring baffle 5 on the shaft inner cylinder 1, and pressing and pushing the second O-shaped ring baffle 5 to move to the magnetic fluid 3 on the shaft inner cylinder 1. After the second O-shaped ring baffle 5 is attached to the magnetic fluid 3 and the fixing glue penetrates through the hole in the outer barrel 2, the fixing glue is filled between the second O-shaped ring baffle 5 and the inner wall of the outer barrel 2, and the second O-shaped ring baffle 5 is fixed on the outer barrel 2 through the fixing glue.
Example 3:
as shown in fig. 1 and 2, the high airtight rotary joint includes a shaft inner cylinder 1, an outer cylinder 2, a magnetic fluid 3, a permanent magnet 4, an O-ring baffle 5, an outer cover 6, and a bearing device 8.
The same points of the combination structure of the high-airtight rotary joint of the present embodiment 3 and the high-airtight rotary joint described in embodiment 1 will not be described again.
The utility model discloses high airtight type rotary joint's preparation method of processing is as follows:
the O-shaped ring baffle 5 and the shaft inner cylinder 1 are fixed into a whole.
The first O-shaped ring baffle 5 is sleeved on the shaft inner cylinder 1, and the first O-shaped ring baffle 5 is pushed to move to the first bearing device 8 on the shaft inner cylinder 1. The fixing glue is filled between the first O-shaped ring baffle 5 and the inner wall of the shaft inner cylinder 1, the first O-shaped ring baffle 5 is fixed on the shaft inner cylinder 1 by the fixing glue, and the first O-shaped ring baffle 5 and the shaft inner cylinder 1 are fixed into a whole.
The outer cylinder 2 is not provided with holes for screws or fixing glue.
And sleeving the second O-shaped ring baffle 5 on the shaft inner cylinder 1, and pressing and pushing the second O-shaped ring baffle 5 to move to the magnetic fluid 3 on the shaft inner cylinder 1. After the second O-shaped ring baffle 5 is attached to the magnetic fluid 3, fixing glue is filled between the second O-shaped ring baffle 5 and the inner wall of the shaft inner cylinder 1, the second O-shaped ring baffle 5 is fixed on the shaft inner cylinder 1 through the fixing glue, and the second O-shaped ring baffle 5 and the shaft inner cylinder 1 are fixed into a whole.
The above embodiments are only used to help understand the manufacturing method and the core idea of the present invention, and the specific implementation is not limited to the above specific implementation, and those skilled in the art can start from the above conception, and the changes made without creative labor all fall within the protection scope of the present invention.
Claims (1)
1. A high-airtight rotary joint comprises a shaft inner cylinder (1), an outer cylinder (2), a magnetic fluid (3), a permanent magnet (4), an O-shaped ring baffle (5), an outer cover (6) and a bearing device (8); the method is characterized in that: a flange (9) is arranged at one end of the shaft inner cylinder (1), and a concave disc for installing the outer cover (6) is reserved on the flange (9) of the outer cylinder (2);
the O-shaped ring baffle (5) is made of a non-magnetic sealing material, and the concave hole (12) on the O-shaped ring baffle (5) forms labyrinth sealing; the thickness of the O-shaped ring baffle (5) is 0.2-5 mm, and the length of the O-shaped ring baffle (5) is 5-38 mm;
the permanent magnet (4) is fixed in a concave strip in the outer barrel (2);
the shaft inner cylinder (1) is arranged in the outer cylinder (2), the shaft inner cylinder (1) and the outer cylinder (2) are supported and fixed by a bearing device (8), and the outer cover (6) is fixedly arranged on the shaft inner cylinder (1);
the O-shaped ring baffle (5) is sleeved on the shaft inner cylinder (1), and the magnetic fluid (3) is filled in a sealing cavity between the O-shaped ring baffle (5), the permanent magnet (4) and the shaft inner cylinder (1);
a multi-stage magnetic fluid O-shaped sealing ring and two O-shaped ring baffles (5) are established between the grooves (11) on the inner shaft cylinder (1) to form a dynamic sealing device of a common body, and the aim of high-air-tightness sealing is achieved between the inner shaft cylinder (1) and the outer cylinder (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020621547.4U CN211951794U (en) | 2020-04-23 | 2020-04-23 | High airtight rotary joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020621547.4U CN211951794U (en) | 2020-04-23 | 2020-04-23 | High airtight rotary joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211951794U true CN211951794U (en) | 2020-11-17 |
Family
ID=73162120
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020621547.4U Expired - Fee Related CN211951794U (en) | 2020-04-23 | 2020-04-23 | High airtight rotary joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211951794U (en) |
-
2020
- 2020-04-23 CN CN202020621547.4U patent/CN211951794U/en not_active Expired - Fee Related
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