CN216923194U - Powder mixing, stirring and gas conveying seal - Google Patents
Powder mixing, stirring and gas conveying seal Download PDFInfo
- Publication number
- CN216923194U CN216923194U CN202220033086.8U CN202220033086U CN216923194U CN 216923194 U CN216923194 U CN 216923194U CN 202220033086 U CN202220033086 U CN 202220033086U CN 216923194 U CN216923194 U CN 216923194U
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- ring
- static
- static ring
- installation cavity
- seat
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Abstract
The utility model discloses a powder mixing, stirring and conveying gas seal which comprises a static ring seat and a movable ring seat, wherein the left end of the static ring seat is provided with a movable ring seat installation cavity for accommodating the movable ring seat, the bottom of the movable ring seat installation cavity is provided with a static ring installation cavity for installing a static ring, the left end of the static ring is provided with an annular static ring boss, the part of the annular static ring boss is positioned in the static ring installation cavity, and a static ring positioning pin is connected between the static ring installation cavity and the annular static ring boss so as to limit the rotation of the static ring; the static ring installation cavity and the static ring positioning pin simultaneously ensure that the static ring can only generate axial displacement; the moving ring and the static ring of the utility model have almost no abrasion during the operation, and only have little abrasion when being started and stopped; compared with a common spiral pressure spring, the wave spring 400 can save about half of space when bearing similar loads, further reduce the whole volume of gas seal and save cost.
Description
Technical Field
The utility model relates to gas seal, in particular to gas seal for powder mixing, stirring and conveying.
Background
The gas seal and the contact type mechanical seal are not greatly different in structure, and also comprise a movable ring, a static ring, a spring and the like; the difference lies in that the end face of the moving ring is provided with a pneumatic dynamic pressure groove, the sealing end face of the groove of the moving ring is divided into two functional areas, namely an outer area and an inner area, the outer area is composed of the dynamic pressure groove and a sealing weir, and the inner area is also called a sealing dam and is a plane part of the moving ring. During operation, the moving ring rotates along with the rotor, gas is introduced into the dynamic pressure groove, the gas introduced into the groove is blocked by the sealing weir when being compressed, the pressure is further increased, the pressure overcomes the spring force behind the static ring and the fluid pressure acting on the static ring, the static ring is pushed open, the contact surface between the dynamic and static rings is separated to form a layer of stable dynamic pressure gas film, the gas film provides sufficient lubrication and cooling for the end surfaces of the dynamic and static rings, a certain sealing gap is kept between the sealing end surfaces by the gas film, and the gas medium is decompressed by the throttling and blocking effects when passing through the sealing gap, so that the sealing of the gas medium is realized; the existing gas seal has a large axial size and occupies a large space.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a powder mixing, stirring and conveying gas seal to solve the problems in the background technology.
In order to achieve the purpose, the utility model provides the following technical scheme:
the powder mixing, stirring and conveying gas seal comprises a static ring seat and a movable ring seat, wherein a movable ring seat installation cavity for accommodating the movable ring seat is formed in the left end of the static ring seat, a static ring installation cavity for installing a static ring is formed in the bottom of the movable ring seat installation cavity, an annular static ring boss is arranged at the left end of the static ring, part of the annular static ring boss is located in the static ring installation cavity, and a static ring positioning pin is connected between the static ring installation cavity and the annular static ring boss to limit the rotation of the static ring; the static ring installation cavity and the static ring positioning pin simultaneously ensure that the static ring can only generate axial displacement; meanwhile, a wave spring is arranged between the right end face of the static ring boss and the bottom of the static ring installation cavity to ensure that the static ring has enough axial thrust; the movable ring seat is sleeved on the main shaft, a movable ring installation cavity for installing a movable ring is formed in the left side of the movable ring seat, and a movable ring positioning pin is fixedly connected between the movable ring installation cavity and the movable ring; the right end of the movable ring is abutted with the left end of the static ring.
Furthermore, a first sealing ring is arranged between the side wall of the static ring and the side wall of the static ring installation cavity.
Furthermore, a second sealing ring is arranged between the movable ring seat and the main shaft.
Furthermore, a third sealing ring is arranged between the movable ring seat and the movable ring.
Furthermore, the right end face of the moving ring is provided with a plurality of dynamic pressure grooves which are arranged in a circular array.
Furthermore, the right-hand member butt of rotating ring seat has a lantern ring, is equipped with the axle card between the lantern ring and the main shaft, and axle card inner circle part card is gone into in the main epaxial draw-in groove, and the outer lane of axle card passes through the screw and is fixed with the lantern ring.
Furthermore, a fourth sealing ring is arranged between the movable ring seat and the sleeve ring.
Furthermore, the side wall of the static ring seat is also provided with an air inlet.
Furthermore, a labyrinth seal structure is arranged between the left end side wall of the movable ring seat installation cavity of the static ring seat and the left end outer side wall of the movable ring seat.
Compared with the prior art, the utility model has the beneficial effects that:
the moving ring and the static ring have almost no abrasion during the operation, and only have small abrasion when being started and stopped;
compared with a common spiral pressure spring, the wave spring 400 can save about half of space when bearing similar loads, further reduce the whole volume of gas seal and save cost.
Drawings
Fig. 1 is a schematic structural diagram of powder mixing, stirring and gas conveying seal.
FIG. 2 is a schematic view of a wave spring in a powder mixing, stirring and transporting gas seal.
FIG. 3 is a schematic end view of a moving ring in a powder mixing, stirring and transporting gas seal.
Fig. 4 is a schematic structural diagram of a labyrinth seal structure in the powder mixing, stirring and conveying gas seal.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, the powder mixing, stirring and transporting gas seal comprises a stationary ring seat 100 and a movable ring seat 200,
a movable ring seat installation cavity 101 for accommodating the movable ring seat 200 is formed in the left end of the fixed ring seat 100, a fixed ring installation cavity 102 for installing the fixed ring 300 is formed in the bottom of the movable ring seat installation cavity 101, an annular fixed ring boss 301 is formed in the left end of the fixed ring 300, part of the annular fixed ring boss 301 is located in the fixed ring installation cavity 102, and a fixed ring positioning pin 103 is connected between the fixed ring installation cavity 102 and the annular fixed ring boss 301 to limit rotation of the fixed ring 300; the static ring installation cavity 102 and the static ring positioning pin 103 simultaneously ensure that the static ring can only generate axial displacement; meanwhile, a wave spring 400 is arranged between the right end face of the static ring boss 301 and the bottom of the static ring installation cavity 102 to ensure that the static ring 300 has enough axial thrust; compared with a common spiral pressure spring, the wave spring 400 can save about half of space when bearing similar load, further reduce the whole volume of gas seal and save cost; the wave spring 400 is provided with a through hole for the fixed ring positioning pin 103 to pass through;
further, a first sealing ring 302 is arranged between the side wall of the stationary ring 300 and the side wall of the stationary ring installation cavity 102;
The movable ring seat 200 is sleeved on the spindle 500, a movable ring installation cavity 201 for installing the movable ring 600 is formed in the left side of the movable ring seat 200, and a movable ring positioning pin 202 is fixedly connected between the movable ring installation cavity 201 and the movable ring 600; the right end of the moving ring 600 is abutted against the left end of the stationary ring 300;
further, a second sealing ring 203 is arranged between the movable ring seat 200 and the main shaft 500;
further, a third seal ring 204 is arranged between the movable ring seat 200 and the movable ring 600;
further, the right end face of the moving ring 600 is provided with a plurality of dynamic pressure grooves 601 arranged in a circular array;
further, a lantern ring 700 is abutted to the right end of the movable ring seat 200, a shaft clamp 701 is arranged between the lantern ring 700 and the main shaft 500, the inner ring part of the shaft clamp 701 is clamped into a clamping groove 702 on the main shaft 500, and the outer ring of the shaft clamp 701 is fixed with the lantern ring 700 through a screw;
further, a fourth sealing ring 703 is arranged between the movable ring seat 200 and the collar 700;
further, the side wall of the stationary ring seat 100 is further provided with an air inlet 104;
further, a labyrinth seal structure 105 is arranged between the left end side wall of the moving ring seat mounting cavity 101 of the stationary ring seat 100 and the left end outer side wall of the moving ring seat 200;
when the dynamic pressure groove is used, when the dynamic ring rotates, the sealing gas is sucked into the dynamic pressure groove, the sealing gas flows from the outer diameter to the center, and the radial component of the sealing gas flows to the sealing weir; due to the throttling action of the sealing weir, gas entering the sealing surfaces is compressed, the gas pressure is raised, the sealing surfaces are pushed open under the action of the pressure, a thin gas film is formed between the two sealing surfaces of the movable ring and the static ring by flowing gas, when the closing force formed by gas static pressure and spring force is equal to the counter force of the gas film, the thickness of the gas film is very stable, and the gas film between dry gas sealing surfaces has good gas film rigidity, so that the stable and reliable sealing operation is ensured.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "left", "right", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or orientations or positional relationships that are conventionally placed when the products of the present invention are used, or orientations or positional relationships that are conventionally understood by those skilled in the art, and are used only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the equipment or elements that are referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance. In the description of the present invention, it is also to be noted that, unless otherwise explicitly stated or limited, the terms "disposed" and "connected" are to be interpreted broadly, and for example, "connected" may be a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; the connection may be direct or indirect via an intermediate medium, and may be a communication between the two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Claims (9)
1. The powder mixing, stirring and conveying gas seal comprises a static ring seat and a movable ring seat, and is characterized in that a movable ring seat installation cavity for accommodating the movable ring seat is formed in the left end of the static ring seat, a static ring installation cavity for installing a static ring is formed in the bottom of the movable ring seat installation cavity, an annular static ring boss is arranged at the left end of the static ring, the annular static ring boss is located in the static ring installation cavity, and a static ring positioning pin is connected between the static ring installation cavity and the annular static ring boss to limit the rotation of the static ring; the static ring installation cavity and the static ring positioning pin simultaneously ensure that the static ring can only generate axial displacement; meanwhile, a wave spring is arranged between the right end face of the static ring boss and the bottom of the static ring installation cavity to ensure that the static ring has enough axial thrust; the movable ring seat is sleeved on the main shaft, a movable ring installation cavity for installing a movable ring is formed in the left side of the movable ring seat, and a movable ring positioning pin is fixedly connected between the movable ring installation cavity and the movable ring; the right end of the movable ring is abutted with the left end of the static ring.
2. The powder mixing, stirring and conveying gas seal according to claim 1, wherein a first sealing ring is arranged between a side wall of the stationary ring and a side wall of the stationary ring installation cavity.
3. The powder mixing, stirring and transporting gas seal according to claim 1, wherein a second seal ring is disposed between the moving ring seat and the main shaft.
4. The powder mixing, stirring and transporting gas seal according to claim 1, wherein a third seal ring is disposed between the moving ring seat and the moving ring.
5. The powder mixing, stirring and conveying gas seal according to claim 1, wherein the right end surface of the rotating ring is provided with a plurality of dynamic pressure grooves arranged in a circular array.
6. The powder mixing, stirring and conveying gas seal according to claim 1, wherein a sleeve ring is abutted to the right end of the movable ring seat, a shaft clamp is arranged between the sleeve ring and the main shaft, an inner ring part of the shaft clamp is clamped in a clamping groove on the main shaft, and an outer ring of the shaft clamp is fixed with the sleeve ring through a screw.
7. The powder mixing, stirring and transporting gas seal according to claim 1, wherein a fourth seal ring is disposed between the moving ring seat and the collar.
8. The powder mixing, stirring and conveying gas seal according to claim 1, wherein the side wall of the stationary ring seat is further provided with an air inlet.
9. The powder mixing, stirring and conveying gas seal as claimed in claim 1, wherein a labyrinth seal structure is provided between the left end side wall of the moving ring seat installation cavity of the stationary ring seat and the left end outer side wall of the moving ring seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220033086.8U CN216923194U (en) | 2022-01-07 | 2022-01-07 | Powder mixing, stirring and gas conveying seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220033086.8U CN216923194U (en) | 2022-01-07 | 2022-01-07 | Powder mixing, stirring and gas conveying seal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216923194U true CN216923194U (en) | 2022-07-08 |
Family
ID=82256255
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220033086.8U Active CN216923194U (en) | 2022-01-07 | 2022-01-07 | Powder mixing, stirring and gas conveying seal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216923194U (en) |
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2022
- 2022-01-07 CN CN202220033086.8U patent/CN216923194U/en active Active
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