CN210510290U - High stability bearing seal structure - Google Patents
High stability bearing seal structure Download PDFInfo
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- CN210510290U CN210510290U CN201921350596.2U CN201921350596U CN210510290U CN 210510290 U CN210510290 U CN 210510290U CN 201921350596 U CN201921350596 U CN 201921350596U CN 210510290 U CN210510290 U CN 210510290U
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- shaft sleeve
- static
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Abstract
The utility model provides a high stability bearing seal structure, include and fix the axle sleeve on the main shaft through hold-down mechanism to and fix at axle sleeve outside elastic compensation mechanism through cramping the piece, and rotating ring and quiet ring. The utility model has the advantages of reasonable design, it is sealed wear resistance good to create, has solved the external risk toward the inside infiltration impurity of equipment, and the life-span of bearing seal is close to the same with the main rotating parts maintenance cycle of equipment, has reduced cost of maintenance, has guaranteed that production is stable.
Description
Technical Field
The invention belongs to the technical field of mechanical sealing, and particularly relates to a high-stability shaft seal structure.
Background
In the prior art, a sealing structure at a main shaft of a material mixing device is usually sealed by a framework oil seal, a steel ring oil seal and a matched tetrafluoro shaft sleeve. The existing problem is that, skeleton oil blanket and steel ring oil blanket life are short, easily decrease the consumption, simultaneously, the tetrafluoro axle sleeve easily rubs with the axle, causes the tetrafluoro bits that the friction produced to fall into the inside contaminated material of equipment, and the material gets into inside the back of bearing seal, causes seal structure inefficacy easily, and the cost that changes, maintains and equipment shut down produced all is than higher, needs to improve seal structure urgently.
Disclosure of Invention
In view of this, the present invention provides a high stability shaft seal structure to overcome the defects in the prior art.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a high stability shaft seal structure comprising:
the shaft sleeve is fixed on the main shaft through a pressing mechanism;
the elastic compensation mechanism is fixed on the outer side of the shaft sleeve through a tightening piece;
a seal assembly comprising a rotating ring and a stationary ring, wherein:
the movable ring is fixed on the movable ring fixing mechanism, the movable ring fixing mechanism comprises a fixed seat arranged corresponding to the hooping piece, an axial adjusting piece is arranged between the fixed seat and the hooping piece, and the movable ring is arranged on the fixed seat;
the static ring is fixed on the static ring seat by a static ring fixing mechanism; an inner retaining ring and an outer retaining ring are respectively arranged on the inner side and the outer side of the static ring seat corresponding to the combining part of the movable ring and the static ring, a scrap falling cavity is formed between the inner retaining ring and the sealing assembly, and a water storage cavity is formed between the outer retaining ring and the sealing assembly; and a cleaning channel communicated with the chip falling cavity is arranged on the static ring seat.
Furthermore, hold-down mechanism includes wedge snap ring and is used for locking wedge snap ring, makes axle sleeve and main shaft locking's clamping piece, the clamping piece includes upper gland and lower gland, and the two passes through screw connection and adjustment between the two.
Furthermore, the elasticity compensation mechanism includes the bellows of suit in the axle sleeve outside, and this bellows includes fixed part and deformation portion of lower extreme, by the binding member is with fixed part locking in the axle sleeve, and deformation portion fixes at the fixing base inboard.
Furthermore, O-shaped rings are arranged between the fixing part of the corrugated pipe and the shaft sleeve and between the shaft sleeve and the main shaft.
Further, a sealing ring is arranged between the movable ring and the deformation part of the corrugated pipe.
Furthermore, an adjusting ring is arranged on the shaft sleeve corresponding to the upper end of the tightening piece, the adjusting ring is sleeved outside the shaft sleeve and fixed on the shaft sleeve by a set screw, and an adjusting screw is arranged on the adjusting ring along the axial direction of the main shaft and penetrates through one end of the adjusting ring to abut against the tightening piece.
Furthermore, the height of the inner baffle ring is greater than the height of the combined surface of the movable ring and the static ring; the height of the outer baffle ring is greater than the height of the combined surface of the movable ring and the static ring.
Further, the inner wall of the shaft sleeve towards one end of the sealing assembly is provided with an inner groove, and the upper end of the inner baffle ring is inserted into the inner groove to form a labyrinth splash-proof structure.
Furthermore, the fixed ring fixing mechanism comprises a pressing piece, and the pressing piece is fixed on the fixed ring seat through a set screw to press and fix the fixed ring on the fixed ring seat.
Furthermore, sealing elements are arranged between the pressing piece and the static ring and between the static ring and the static ring seat.
Compared with the prior art, the invention has the following advantages:
the invention has reasonable structural design, is additionally provided with the inner baffle ring, the outer baffle ring, the cleaning channel and other structures, improves the sealed working environment, solves the risk of impurities permeating into the equipment from the outside, has the service life of the shaft seal nearly the same as the maintenance cycle of the main rotating parts of the equipment, reduces the maintenance cost and ensures the stable production.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the invention without limitation. In the drawings:
FIG. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic structural diagram of a wedge-shaped snap ring in the invention;
FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;
FIG. 4 is a schematic view of a pressing mechanism in the invention;
FIG. 5 is a schematic structural view of a sleeve portion in the invention;
fig. 6 is a schematic structural diagram of a fixing seat portion in the invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings, which are merely for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be construed as limiting the invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, the meaning of "a plurality" is two or more unless otherwise specified.
In the description of the invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "connected" are to be construed broadly, e.g. as being fixed or detachable or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art through specific situations.
The invention will be described in detail with reference to the following embodiments with reference to the attached drawings.
A high stability shaft seal structure, as shown in fig. 1 to 6, comprising:
the shaft sleeve 1 is fixed on the main shaft 2 through a pressing mechanism;
the elastic compensation mechanism is fixed on the outer side of the shaft sleeve through the hoop part 5;
seal assembly, including rotating ring 3 and stationary ring 4, wherein:
the movable ring is fixed on the movable ring fixing mechanism, the movable ring fixing mechanism comprises a fixed seat 6 which is arranged corresponding to the hooping piece, an axial adjusting piece 7 (generally, an axially arranged spring can be adopted) which can push the fixed seat to be adjusted along the axial direction is arranged between the fixed seat and the hooping piece, and the movable ring is arranged on the fixed seat; an inner mounting table 8 is arranged on one side of the fixed seat facing the center of the main shaft, the movable ring is fixed on the inner mounting table through gluing (or other connection modes can be adopted), and the part of the movable ring matched with the static ring is exposed out of the inner mounting table;
the stationary ring is fixed on the stationary ring seat 9 by a stationary ring fixing mechanism; an inner retaining ring 10 and an outer retaining ring 11 are respectively arranged on the inner side and the outer side of the static ring seat corresponding to the joint part of the movable ring and the static ring, a scrap falling cavity 12 is formed between the inner retaining ring and the sealing assembly, and a water storage cavity 13 is formed between the outer retaining ring and the sealing assembly; and a cleaning channel 14 communicated with the chip falling cavity is arranged on the static ring seat.
The pressing mechanism comprises a wedge-shaped clamping ring and a clamping piece used for locking the wedge-shaped clamping ring and locking the shaft sleeve and the main shaft, wherein the clamping piece comprises an upper pressing cover 15 and a lower pressing cover 16 which are connected and adjusted through screws.
It should be noted that, a plurality of slots 27 (openings) are axially formed in the upper end of the shaft sleeve, the slots are located at positions corresponding to the pressing mechanism, the upper pressing cover and the lower pressing cover are close to each other by screwing the screw, the wedge-shaped clamping ring can be pressed, the wedge-shaped clamping ring generates an acting force for hooping the shaft sleeve, the slots (openings) of the shaft sleeve can contract, and then the main shaft is tightly held, so that the fixing purpose is achieved.
The wedge-shaped clamping ring is provided with an opening 17 (as an adjusting seam) along the axial direction, and the wedge-shaped clamping ring and an upper pressure cover and a lower pressure cover outside the wedge-shaped clamping ring; the wedge-shaped snap ring is sleeved on the shaft sleeve, an outer mounting platform 18 matched with the inner wall of the wedge-shaped snap ring is arranged on the outer wall of the upper end of the shaft sleeve, and the shape of the inner wall of the upper pressing cover and the shape of the inner wall of the lower pressing cover are matched with the structure of the cambered surface or the inclined surface on the outer wall of the wedge-shaped.
It should be noted that, in the structure diagram of the mechanical seal shown in fig. 1, except for the case that the sealing element is not damaged at other positions of the contact surface of the moving ring and the static ring, the mechanical seal will not leak normally, but there is a possibility of leakage at the contact surface of the moving ring and the static ring, when the internal pressure of the device is large and the device tries to break through the sealing surface, the good contact of the sealing surface is ensured by the action force of the bellows structure and the axial adjusting member (spring). In an alternative embodiment, the elastic compensation mechanism includes a bellows sleeved outside the shaft sleeve, the bellows includes a fixing portion 19 and a deformation portion 20 at a lower end thereof, the fixing portion is locked to the shaft sleeve by the tightening member, the deformation portion is fixed inside the fixing base, the connection between the deformation portion and the fixing base may be made by gluing or by using a connecting member such as a screw, which is not specifically limited herein, and the tightening member is usually made by using a half joint in the prior art.
The O-shaped rings 26 are arranged between the fixing part of the corrugated pipe and the shaft sleeve and between the shaft sleeve and the main shaft, the static sealing form stability is good, the reliability is high, the sealing performance between the corrugated pipe and the shaft sleeve is guaranteed, the sealing performance between the elastic compensation mechanism and the shaft sleeve is good, the end face leakage pollution is avoided, and meanwhile, the sealing performance between the shaft sleeve and the main shaft is also guaranteed.
Usually, a seal ring may be provided between the dynamic ring and the deformed portion of the bellows, and a seal member 25 (seal ring or seal gasket) may be provided between the pressing member and the static ring and between the static ring and the static ring seat, so that a good sealing property is ensured by the static seal.
The shaft sleeve is provided with an adjusting ring 21 corresponding to the upper end of the clamping member, the adjusting ring is sleeved outside the shaft sleeve and fixed on the shaft sleeve by a set screw 22, an adjusting screw 23 is arranged on the adjusting ring along the axial direction of the main shaft, and one end of the adjusting screw penetrating through the adjusting ring is abutted against the upper end face of the clamping member.
Under normal conditions, the height of the inner baffle ring is greater than the height of the combined surface of the movable ring and the static ring; the height of the outer baffle ring is greater than the height of the combined surface of the movable ring and the static ring. When the rotating speed of the machine seal is very high, water (or other liquid) needs to be added into a water storage cavity between the outer baffle ring and the sealing assembly for cooling and lubrication, and although water is not added when the rotating speed is low, the friction surface of the machine seal is abraded faster than that of the machine seal without adding water when the machine seal is in a dry grinding state, so that the arrangement of the water storage cavity for cooling, lubricating and lubricating the working surface of the static ring is necessary.
Because the rotating friction of the movable ring and the static ring can generate extremely tiny abrasive dust (the higher the rotating speed is, the more the abrasive dust is), and the abrasive dust is not allowed to fall into a medium for the working condition with high cleanliness (such as the pharmaceutical industry), the invention provides a dust falling cavity and a cleaning channel corresponding to the dust falling cavity. It should be pointed out that, leave certain clearance volume between interior fender ring and main shaft, not only prevent to produce with the main shaft and interfere, simultaneously, when absorbing the abrasive dust of the intracavity that falls bits through clearance passageway, play micro-tonifying qi effect, avoid falling bits intracavity abrasive dust difficult to absorb.
The inner wall of the shaft sleeve towards one end of the sealing assembly is provided with an inner groove, the upper end of the inner retaining ring is inserted into the inner groove to form a labyrinth splash-proof structure, and abrasive dust is prevented from splashing to the position near the main shaft. As for the outer retaining ring part, a sealing ring can be arranged between the outer retaining ring and the static ring seat to ensure the sealing property.
In an alternative embodiment, the stationary ring fixing mechanism includes a pressing member 24 fixed to the stationary ring base by a set screw to press and fix the stationary ring to the stationary ring base. The compressing member can be a ring-shaped pressing plate, and a fixed table matched with the compressing member is arranged outside the static ring.
The invention has reasonable structural design, is additionally provided with the inner baffle ring, the outer baffle ring, the cleaning channel and other structures, improves the sealed working environment, solves the risk of impurities permeating into the equipment from the outside, has the service life of the shaft seal nearly the same as the maintenance cycle of the main rotating parts of the equipment, reduces the maintenance cost and ensures the stable production.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the invention, so that any modifications, equivalents, improvements and the like, which are within the spirit and principle of the present invention, should be included in the scope of the present invention.
Claims (10)
1. A high stability shaft seal structure, comprising:
the shaft sleeve is fixed on the main shaft through a pressing mechanism;
the elastic compensation mechanism is fixed on the outer side of the shaft sleeve through a tightening piece;
a seal assembly comprising a rotating ring and a stationary ring, wherein:
the movable ring is fixed on the movable ring fixing mechanism, the movable ring fixing mechanism comprises a fixed seat arranged corresponding to the hooping piece, an axial adjusting piece is arranged between the fixed seat and the hooping piece, and the movable ring is arranged on the fixed seat;
the static ring is fixed on the static ring seat by a static ring fixing mechanism; an inner retaining ring and an outer retaining ring are respectively arranged on the inner side and the outer side of the static ring seat corresponding to the combining part of the movable ring and the static ring, a scrap falling cavity is formed between the inner retaining ring and the sealing assembly, and a water storage cavity is formed between the outer retaining ring and the sealing assembly; and a cleaning channel communicated with the chip falling cavity is arranged on the static ring seat.
2. The high stability shaft seal structure according to claim 1, wherein: the pressing mechanism comprises a wedge-shaped clamping ring and a clamping piece for locking the wedge-shaped clamping ring and locking the shaft sleeve and the main shaft; the clamping part comprises an upper gland and a lower gland which are connected and adjusted through screws.
3. The high stability shaft seal structure according to claim 1, wherein: the elastic compensation mechanism comprises a corrugated pipe sleeved outside the shaft sleeve, the corrugated pipe comprises a fixing part and a deformation part at the lower end of the fixing part, the fixing part is locked on the shaft sleeve by the hooping part, and the deformation part is fixed on the inner side of the fixing seat.
4. The high stability shaft seal structure according to claim 3, wherein: o-shaped rings are arranged between the fixing part of the corrugated pipe and the shaft sleeve and between the shaft sleeve and the main shaft.
5. The high stability shaft seal structure according to claim 3, wherein: and a sealing ring is arranged between the movable ring and the deformation part of the corrugated pipe.
6. The high stability shaft seal structure according to claim 1, wherein: the shaft sleeve is provided with an adjusting ring corresponding to the upper end of the tightening piece, the adjusting ring is sleeved outside the shaft sleeve and fixed on the shaft sleeve by a set screw, and the adjusting ring is provided with an adjusting screw along the axial direction of the main shaft, and the adjusting screw penetrates through one end of the adjusting ring to abut against the tightening piece.
7. The high stability shaft seal structure according to claim 1, wherein: the height of the inner baffle ring is greater than the height of the combined surface of the movable ring and the static ring; the height of the outer baffle ring is greater than the height of the combined surface of the movable ring and the static ring.
8. The high stability shaft seal structure according to claim 1 or 7, wherein: the inner wall of the shaft sleeve towards one end of the sealing assembly is provided with an inner groove, and the upper end of the inner baffle ring is inserted into the inner groove to form a labyrinth splash-proof structure.
9. The high stability shaft seal structure according to claim 1, wherein: the static ring fixing mechanism comprises a pressing piece, and the pressing piece is fixed on the static ring seat through a set screw to press and fix the static ring on the static ring seat.
10. The high stability shaft seal structure according to claim 9, wherein: and sealing elements are arranged between the pressing element and the static ring and between the static ring and the static ring seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921350596.2U CN210510290U (en) | 2019-08-20 | 2019-08-20 | High stability bearing seal structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921350596.2U CN210510290U (en) | 2019-08-20 | 2019-08-20 | High stability bearing seal structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210510290U true CN210510290U (en) | 2020-05-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921350596.2U Active CN210510290U (en) | 2019-08-20 | 2019-08-20 | High stability bearing seal structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210510290U (en) |
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2019
- 2019-08-20 CN CN201921350596.2U patent/CN210510290U/en active Active
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