CN108843614B - Double-end-face shaft sealing device - Google Patents
Double-end-face shaft sealing device Download PDFInfo
- Publication number
- CN108843614B CN108843614B CN201810810849.3A CN201810810849A CN108843614B CN 108843614 B CN108843614 B CN 108843614B CN 201810810849 A CN201810810849 A CN 201810810849A CN 108843614 B CN108843614 B CN 108843614B
- Authority
- CN
- China
- Prior art keywords
- ring
- seat
- pump
- machine
- static
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 88
- 230000003068 static effect Effects 0.000 claims abstract description 64
- 230000006835 compression Effects 0.000 claims abstract description 22
- 238000007906 compression Methods 0.000 claims abstract description 22
- 239000000110 cooling liquid Substances 0.000 claims abstract description 16
- 239000012809 cooling fluid Substances 0.000 claims 2
- 238000001816 cooling Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 5
- 238000009837 dry grinding Methods 0.000 abstract description 4
- 239000000463 material Substances 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000011344 liquid material Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/10—Shaft sealings
- F04D29/12—Shaft sealings using sealing-rings
- F04D29/126—Shaft sealings using sealing-rings especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/586—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The double-end-face shaft sealing device comprises a static ring assembly and a moving ring assembly which rotates along with a rotating shaft (2), wherein the static ring assembly comprises a machine sealing seat, a front static ring (3) and a rear static ring (4), the machine sealing seat comprises a front machine sealing seat (5) and a rear machine sealing seat (6), the moving ring assembly comprises a driving ring seat (7) and a front moving ring (8), a secondary moving ring seat (9) and a rear moving ring (10), the secondary moving ring seat (9) is sleeved outside the driving ring seat (7), and the front moving ring (8) and the rear moving ring (10) are provided with compression springs (11); the contact surface of each movable ring and the contact surface of the static ring are mutually clung to form a friction pair; an annular cavity (12) is formed between the machine seal seat and the movable ring assembly, and the machine seal seat is provided with a cooling liquid inlet and outlet (13) which is communicated with the annular cavity (12); the mechanical seal cooling effect is good, the dry grinding phenomenon can not occur, the matching stability of the dynamic ring and the static ring is good, the mechanical seal structure is compact and reasonable, and the service life is long; the movable ring seat is connected with the rotating shaft (2) outside the machine seal, so that the movable ring seat is safe and convenient to install and detach.
Description
Technical Field
The invention relates to a double-end-face shaft sealing device, in particular to a double-end-face shaft sealing device for a rotor pump.
Background
Various conveying pumps or mixers are required to be provided with shaft sealing devices, such as a rotor pump for conveying fluid materials, the mechanical shaft sealing devices are rotating pairs which are formed by mutually clinging the end faces of a movable ring which moves along with a shaft and a static ring which is relatively static by using a compression spring, and peripheral gaps are sealed by sealing rings. When the pump works, the moving ring and the static ring are rubbed, and the mechanical sealing parts comprising the moving ring, the static ring and the sealing ring are required to bear heating abrasion. A set of dynamic and static rings, also known as a single-ended shaft seal, is typically employed, and two sets of dynamic and static rings, also known as double single-ended shaft seals, are employed to enhance sealing performance. The shaft seal of the pump is very important, and the shaft seal of the pump is one of the relevant technology all the time; the shaft sealing performance of the pump and the service life of the shaft seal are improved, and the pollution of leakage to the environment is reduced, so that the pump is a long-sought goal of those skilled in the art.
In the technical scheme of the prior mechanical shaft sealing device, the pump shaft sealing device cools by utilizing fluid materials conveyed by the pump shaft sealing device, and is also provided with a cooling liquid circulating device for cooling, so that more or less dynamic and static rings are not matched stably enough, the mechanical seal cooling is insufficient, the mechanical seal dry grinding phenomenon is often caused, and the installation and maintenance inspection are inconvenient.
In addition, in the existing mechanical shaft sealing device, such as a rotor pump shaft sealing device, a connecting pin connected with a rotating ring and a rotating shaft is positioned in a machine seal, the connecting pin easily loosens and slides out in the working process of the rotor pump, and because the connecting pin is positioned in the machine seal, the looseness phenomenon is difficult to discover in time, the connecting pin is always completely separated, so that a machine seal part is damaged, the machine seal part is seized, and economic loss and production plan delay are caused.
Disclosure of Invention
Aiming at the technical problem, the invention provides the double-end-face shaft sealing device, which has the advantages that the matching of the dynamic ring and the static ring is stable, the machine seal is sufficiently cooled, the machine seal cannot generate dry grinding phenomenon, and the installation, the maintenance and the inspection are convenient.
The technical scheme adopted for solving the technical problems is as follows:
A double-end-face shaft sealing device comprises a static ring component which is static relative to a pump body (1) and a moving ring component which rotates relative to the pump body (1) along with a rotating shaft (2), and is characterized in that the static ring component comprises a machine sealing seat, a front static ring (3) and a rear static ring (4), the machine sealing seat comprises a front machine sealing seat (5) and a rear machine sealing seat (6), the moving ring component comprises a driving ring seat (7), a front moving ring (8) driven by the driving ring seat, a secondary moving ring seat (9) and a rear moving ring (10) driven by the secondary moving ring seat, the moving ring seat is cylindrical and sleeved outside the rotating shaft (2), the machine sealing seat is sleeved outside the moving ring component and is fixedly connected with the pump body (1), the secondary moving ring seat (9) is sleeved outside the driving ring seat (7) and is fixedly connected with each other, the front static ring (3) is fixedly arranged on the inner side of a pump of the front machine sealing seat (5), the rear static ring (4) is fixedly arranged on the outer side of the pump of the rear machine sealing seat (6), the front moving ring (8) is clamped on the inner side of the pump of the driving ring seat (7), the pump 8 is clamped on the inner side of the driving ring seat (7), the inner wall of the driving ring (7) is clamped between the driving ring seat (7) and the inner wall (11), a compression spring (11) is also arranged in the annular cavity between the rear moving ring (10) and the side table of the outer wall of the secondary moving ring seat (9); the contact surface of each movable ring and the contact surface of the static ring are mutually clung to form a friction pair; an annular cavity (12) for containing cooling liquid is formed between the machine seal seat and the movable ring assembly, and a cooling liquid inlet and outlet (13) is formed in the machine seal seat and communicated with the annular cavity (12); sealing rings are respectively arranged between the front machine sealing seat (5) and the pump body (1), between the front machine sealing seat (5) and the rear machine sealing seat (6) and between the driving ring seat (7) and the rotating shaft (2); the driving ring seat (7) is provided with a fixed connection mechanism between the extension section of the driving ring seat, which extends out of the machine sealing seat, and the rotating shaft (2).
The following are further solutions, respectively.
The compression spring (11) is a single traditional large spring or a wave spring sleeved outside the rotating shaft (2); or the compression springs (11) are a plurality of small springs uniformly distributed along the outer circumference of the rotating shaft (2).
And a spring washer (14) is additionally arranged in each annular cavity, and at least one end of the compression spring (11) is propped against one side of the spring washer (14).
At least 2 convex ribs (15) are arranged on the inner side of the pump of the driving ring seat (7) along the circumference of the inner wall of the driving ring seat, and corresponding concave grooves (16) are arranged on the front moving ring (8) along the circumference of the outer side wall of the front moving ring; at least 2 convex ribs (15) are arranged on the inner side of the secondary moving ring seat (9) along the circumference of the inner wall of the secondary moving ring seat, and corresponding concave grooves (16) are arranged on the rear moving ring (10) along the circumference of the outer side wall of the rear moving ring seat.
4 Convex ribs (15) are uniformly distributed on the inner side of the pump of the driving ring seat (7) along the circumference of the inner wall of the pump, and 4 corresponding depressions (16) are uniformly distributed on the front moving ring (8) along the circumference of the outer side wall of the front moving ring; the inner side of the pump of the secondary moving ring seat (9) is uniformly provided with 4 convex ribs (15) along the circumference of the inner wall of the pump, and the rear moving ring (10) is uniformly provided with 4 corresponding depressions (16) along the circumference of the outer side wall of the rear moving ring.
The front machine seal seat (5) comprises an extension part (17) and a flange end (18), 1 pair of pin holes (19) are symmetrically formed in the extension part (17) of the front machine seal seat (5), 1 pair of corresponding notch grooves (20) are symmetrically formed in the inner side of the front static ring (3) pump, and 1 pair of pins (33) penetrate through the pin holes (19) of the front machine seal seat (5) and are inserted into the notch grooves (20) of the front static ring (3) to realize connection of the two; the rear machine seal seat (6) comprises a cylinder body and a flange end (18), the flange ends (18) of the front machine seal seat (5) and the rear machine seal seat (6) are provided with a plurality of connecting holes (22) along the circumference of the flange ends, and the flange ends are fixedly connected with the outer side of the pump body (1) through a plurality of connecting bolts; the outer side of the pump of the barrel body of the rear seal seat (6) is symmetrically provided with 1 pair of pin holes (19), the outer side of the pump of the rear static ring (4) is symmetrically provided with 1 pair of corresponding notch grooves (20), and 1 pair of pins (33) are inserted into the notch grooves (20) of the rear static ring (4) through the pin holes (19) of the rear seal seat (6) to realize the connection of the two.
The cylinder of the driving ring seat (7) is symmetrically provided with 1 pair of pin holes (19), the secondary ring seat (9) is symmetrically provided with 1 pair of corresponding notch grooves (20), and 1 pair of pins (33) penetrate through the notch grooves (20) of the secondary ring seat (9) and are inserted into the pin holes (19) of the driving ring seat (7) to realize connection of the two.
The sealing ring comprises a first O-shaped ring (23) clamped between the front static ring (3) and the inner cavity wall of the front machine sealing seat (5), a second O-shaped ring (24) clamped between the front moving ring (8) and the rotating shaft (2), a third O-shaped ring (25) clamped between the driving ring seat (7) and the rotating shaft (2), a fourth O-shaped ring (26) clamped between the rear static ring (4) and the inner cavity wall of the rear machine sealing seat (6), a fifth O-shaped ring (27) clamped between the rear moving ring (10) and the outer wall of the cylinder body of the driving ring seat (7), a sixth O-shaped ring (28) clamped between the front machine sealing seat (5) and the side wall of the pump body (1) and a seventh O-shaped ring (29) clamped between the front machine sealing seat (5) and the rear machine sealing seat (6).
The fixed connection mechanism between the driving ring seat (7) and the rotating shaft (2) comprises a fixed sleeve (30) sleeved on the outer side of the driving ring seat (7) pump, 1 pair of jacking threaded holes (31) are symmetrically formed in the fixed sleeve (30), 1 pair of through holes (34) are symmetrically formed in the extending section of the driving ring seat (7), and 1 pair of jacking screws (32) matched with the jacking threaded holes (31) of the fixed sleeve (30) respectively penetrate through the through holes (34) of the driving ring seat (7) to jack the rotating shaft (2).
The rotating shaft (2) is provided with a pit at the position of the jacking screw (32), and the jacking screw (32) jacks into the pit.
Wear-resistant layers are sprayed on the contact surface of the front stationary ring (3) and the front movable ring (8) and the contact surface of the rear stationary ring (4) and the rear movable ring (10).
An annular cavity (12) between the mechanical seal seat and the movable ring component forms a cooling liquid circulation system with the outside through a cooling liquid inlet and outlet (13).
The double-end-face shaft sealing device adopts a detachable machine seal seat comprising a front machine seal seat (5) and a rear machine seal seat (6) to form a machine seal inner cavity, a movable ring assembly comprises a driving ring seat (7), a front movable ring (8) driven by the driving ring seat, a secondary movable ring seat (9) and a rear movable ring (10) driven by the secondary movable ring seat, the secondary movable ring seat (9) is sleeved outside the driving ring seat (7) and is in interactive connection, and the front movable ring (8) and the rear movable ring (10) are respectively clamped and respectively form friction pairs with a front static ring and a rear static ring (4) positioned at the front end and the rear end of the machine seal inner cavity. The cooling effect is guaranteed by the coolant liquid of the machine seal inner chamber, and the front static ring machine seal piece positioned on the inner side of the pump can be cooled by materials, so that the whole machine seal cooling effect is good, and the dry grinding phenomenon can not occur. Each movable ring is provided with an independent compression spring, the matching stability of the movable ring and the static ring is good, the mechanical seal structure is compact and reasonable, and the manufacturing is convenient. The axial length of the whole mechanical seal is equivalent to that of a single-end surface mechanical seal, and the service life is long. In addition, the fixed connecting mechanism of the movable ring seat is arranged on the extension section of the driving ring seat (7) outside the pump beyond the machine seal seat and is positioned outside the machine seal, so that various defects and potential safety hazards of connecting pins connected with the movable ring seat and the rotating shaft in the prior art in the machine seal are eliminated, and the installation and the disassembly are convenient. The double-end-face shaft sealing device is particularly suitable for a rotor pump and is also suitable for other liquid material conveying pumps or mixers.
Drawings
FIG. 1 is a schematic view of a partial cross-sectional structure of a double-ended shaft seal for a rotor pump according to the present invention;
Fig. 2 and 3 are schematic perspective views of the front machine seal seat, respectively showing different orientations;
Fig. 4 and 5 are schematic perspective views of the rear seal seat, respectively showing different orientations;
FIG. 6 is a schematic perspective view of a front stationary ring;
FIG. 7 is a perspective view of the front ring;
FIG. 8 is a schematic perspective view of a front spring washer;
fig. 9 and 10 are schematic perspective views of the driving ring seat, respectively showing different orientations;
FIG. 11 is a schematic perspective view of a secondary ring seat;
FIG. 12 is a schematic perspective view of the rear ring;
FIG. 13 is a schematic perspective view of a rear stationary ring;
FIG. 14 is a schematic perspective view of a rear spring washer;
Fig. 15 is a schematic perspective view of the retaining sleeve.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the double-ended shaft seal device for a rotor pump shown in fig. 1 to 15. For convenience of description, the side of each seal facing the inside of the rotor pump is referred to as the pump inside, and the side facing the outside of the rotor pump is referred to as the pump outside.
As shown in fig. 1, a double-end-face shaft sealing device comprises a stationary ring assembly which is static relative to a pump body 1 and a movable ring assembly which rotates along with a rotating shaft 2 relative to the pump body 1; the static ring assembly comprises a machine seal seat, a front static ring 3 and a rear static ring 4, the machine seal seat comprises a front machine seal seat 5 and a rear machine seal seat 6, and the movable ring assembly comprises a driving ring seat 7, a front movable ring 8 driven by the driving ring seat, a secondary movable ring seat 9 and a rear movable ring 10 driven by the secondary movable ring seat, which are cylindrical and are sleeved outside the rotating shaft 2; the machine seal seat is sleeved outside the movable ring assembly and fixedly connected with the pump body 1, the secondary movable ring seat 9 is sleeved outside the drive ring seat 7 and fixedly connected with each other, the front static ring 3 is fixedly arranged on the inner side of the pump of the front machine seal seat 5, the rear static ring 4 is fixedly arranged on the outer side of the pump of the rear machine seal seat 6, the front movable ring 8 is clamped on the inner side of the pump of the drive ring seat 7, a compression spring 11 is arranged in an annular cavity between the front movable ring 8 and the side table of the inner wall of the drive ring seat 7, the rear movable ring 10 is clamped on the outer side of the pump of the secondary movable ring seat 9, and a compression spring 11 is also arranged in an annular cavity between the rear movable ring 10 and the side table of the outer wall of the secondary movable ring seat 9; the contact surface of each movable ring and the contact surface of the static ring are mutually clung to form a friction pair; an annular cavity 12 for containing cooling liquid is formed between the machine seal seat and the movable ring assembly, and the machine seal seat is provided with a cooling liquid inlet and outlet 13 which is communicated with the annular cavity 12; sealing rings are respectively arranged on the front static ring 3, the rear static ring 4, the front moving ring 8 and the rear moving ring 10, and sealing rings are respectively arranged between the front machine seal seat 5 and the pump body 1, between the front machine seal seat 5 and the rear machine seal seat 6, and between the driving ring seat 7 and the rotating shaft 2; the driving ring seat 7 is provided with a fixed connection mechanism between the extension section of the driving ring seat outside the pump and the machine sealing seat and the rotating shaft 2.
The compression spring 11 is a single traditional large spring or a wave spring sleeved outside the rotating shaft 2; or the compression springs 11 are a plurality of small springs uniformly distributed along the outer circumference of the rotating shaft 2.
As shown in fig. 1, the sealing ring comprises a first O-shaped ring 23 clamped between the front static ring 3 and the inner cavity wall of the front sealing seat 5, a second O-shaped ring 24 clamped between the front moving ring 8 and the rotating shaft 2, a third O-shaped ring 25 clamped between the driving ring seat 7 and the rotating shaft 2, a fourth O-shaped ring 26 clamped between the rear static ring 4 and the inner cavity wall of the rear sealing seat 6, a fifth O-shaped ring 27 clamped between the rear moving ring 10 and the outer wall of the barrel of the driving ring seat 7, a sixth O-shaped ring 28 clamped between the front sealing seat 5 and the side wall of the pump body 1, and a seventh O-shaped ring 29 clamped between the front sealing seat 5 and the rear sealing seat 6.
As shown in fig. 1, spring washers 14 are respectively added in the annular cavities, and at least one end of the compression spring 11 is propped against one side of the spring washers 14. As shown in fig. 8, 1 front spring washer 14 is provided between the pump inner side of the compression spring 11 and the front moving ring 8, and the pump inner side of the front spring washer 14 is provided with an inner ring boss which extends into the outer ring of the front moving ring 8 and contacts with the second O-ring 24. As shown in fig. 14, the rear spring washers 14 are provided in 2 numbers, and respectively pad both end faces of the rear compression spring 11. Because the elastic force of the compression spring 11 is large, if the length of the compression spring 11 is the whole annular cavity span, the spring can be very difficult to assemble and disassemble, and the spring washer 14 can be additionally arranged to enable the length of the compression spring 11 to be shorter than the cavity span, so that the spring can be easily assembled and disassembled.
As shown in fig. 9 and 10, at least 2 ribs 15 are arranged on the inner side of the pump of the driving ring seat 7 along the circumference of the inner wall of the driving ring seat, and corresponding depressions 16 are arranged on the front moving ring 8 along the circumference of the outer side wall of the front moving ring 8 as shown in fig. 7; as shown in fig. 11, at least 2 ribs 15 are provided on the inside of the secondary ring seat 9 along the circumference of the inner wall thereof, and as shown in fig. 12, corresponding recesses 16 are provided on the rear ring 10 along the circumference of the outer wall thereof.
As shown in fig. 9 and 10, 4 ribs 15 are uniformly distributed on the inner side of the pump of the driving ring seat 7 along the circumference of the inner wall of the driving ring seat, and as shown in fig. 7, 4 corresponding depressions 16 are uniformly distributed on the front moving ring 8 along the circumference of the outer side wall of the front moving ring; as shown in fig. 11, 4 ribs 15 are uniformly distributed on the inner side of the secondary moving ring seat 9 along the circumference of the inner wall, and as shown in fig. 12, 4 corresponding recesses 16 are uniformly distributed on the rear moving ring 10 along the circumference of the outer side wall.
As shown in fig. 2 and 3, the front sealing seat 5 comprises an extension part 17 and a flange end 18, 1 pair of pin holes 19 are symmetrically formed on the extension part 17 of the front sealing seat 5, 1 pair of corresponding notch grooves 20 are symmetrically formed on the inner side of the pump of the front static ring 3 as shown in fig. 6, and 1 pair of pins 33 are inserted into the notch grooves 20 of the front static ring 3 through the pin holes 19 of the front sealing seat 5 to realize connection of the two; as shown in fig. 4 and 5, the rear seal seat 6 comprises a cylinder body and a flange end 18, the flange ends 18 of the front seal seat 5 and the rear seal seat 6 are respectively provided with a plurality of connecting holes 22 along the circumference thereof, and are fixedly connected with the outer side of the pump body 1 through a plurality of connecting bolts; the outer side of the pump of the barrel body of the rear seal seat 6 is symmetrically provided with 1 pair of pin holes 19, as shown in fig. 13, the outer side of the pump of the rear static ring 4 is symmetrically provided with 1 pair of corresponding notch grooves 20, and 1 pair of pins 33 are inserted into the notch grooves 20 of the rear static ring 4 through the pin holes 19 of the rear seal seat 6 to realize the connection of the two.
As shown in fig. 9 and 10, the cylinder body of the driving ring seat 7 is symmetrically provided with 1 pair of pin holes 19, as shown in fig. 11, the secondary ring seat 9 is symmetrically provided with 1 pair of corresponding notch grooves 20, and 1 pair of pins 33 are inserted into the pin holes 19 of the driving ring seat 7 through the notch grooves 20 of the secondary ring seat 9 to realize the connection of the two.
As shown in fig. 1, the fixed connection mechanism between the driving ring seat 7 and the rotating shaft 2 comprises a fixed sleeve 30 sleeved on the outer side of the driving ring seat 7, as shown in fig. 15, the fixed sleeve 30 is symmetrically provided with 1 pair of jacking threaded holes 31, as shown in fig. 9 and 10, the extending section of the driving ring seat 7 is symmetrically provided with 1 pair of through holes 34, and 1 pair of jacking screws 32 matched with the jacking threaded holes 31 of the fixed sleeve 30 respectively penetrate through the through holes 34 of the driving ring seat 7 to jack the rotating shaft 2. In order to enhance the tightening effect, the rotating shaft 2 is provided with a pit at the position of the tightening screw 32, and the tightening screw 32 is pushed into the pit. The fixed connection mechanism is arranged on the extension section of the drive ring seat 7, which exceeds the machine seal seat outside the pump, is positioned outside the machine seal, eliminates various defects and potential safety hazards that the connecting pin for connecting the movable ring and the rotating shaft in the prior art is positioned in the machine seal, and is convenient to install and detach.
In order to enhance the contact wear resistance of the friction pair, a wear-resistant layer can be sprayed on the contact surface of the static ring 3 and the front moving ring 8 and the contact surface of the rear static ring 4 and the rear moving ring 10.
The double-end-face shaft sealing device is closed after cooling liquid is injected into the annular cavity 12 through the cooling liquid inlet and outlet 13, and is cooled by the cooling liquid which rolls along with the ring assembly in the annular cavity 12 during operation. Or the annular cavity 12 between the machine seal seat and the movable ring component forms a cooling liquid circulation system with the outside through the cooling liquid inlet and outlet 13, so that the cooling effect is better. For a rotor pump using a corrosion resistant material, water may be used as the cooling liquid, although other cooling liquids may be used.
The double-end-face shaft sealing device is particularly suitable for a rotor pump and is also suitable for other liquid material conveying pumps or mixers.
Claims (12)
1. A double-end-face shaft sealing device comprises a stationary ring component which is static relative to a pump body (1) and a movable ring component which rotates along with a rotating shaft (2) relative to the pump body (1); the static ring assembly is characterized by comprising a machine sealing seat, a front static ring (3) and a rear static ring (4), wherein the machine sealing seat comprises a front machine sealing seat (5) and a rear machine sealing seat (6), and the moving ring assembly comprises a driving ring seat (7), a front moving ring (8) driven by the driving ring seat, a secondary moving ring seat (9) and a rear moving ring (10) driven by the secondary moving ring seat, which are cylindrical and sleeved outside the rotating shaft (2); the machine seal seat is sleeved outside the movable ring assembly and is fixedly connected with the pump body (1), the secondary movable ring seat (9) is sleeved outside the drive ring seat (7) and is fixedly connected with each other, the front static ring (3) is fixedly arranged on the inner side of the pump of the front machine seal seat (5), the rear static ring (4) is fixedly arranged on the outer side of the pump of the rear machine seal seat (6), the front movable ring (8) is clamped on the inner side of the pump of the drive ring seat (7), a compression spring (11) is arranged in an annular cavity between the front movable ring (8) and an inner wall side table of the drive ring seat (7), the rear movable ring (10) is clamped on the outer side of the pump of the secondary movable ring seat (9), and the compression spring (11) is also arranged in an annular cavity between the rear movable ring (10) and the outer wall side table of the secondary movable ring seat (9); the contact surface of each movable ring and the contact surface of the static ring are mutually clung to form a friction pair; an annular cavity (12) for containing cooling liquid is formed between the machine seal seat and the movable ring assembly, and a cooling liquid inlet and outlet (13) is formed in the machine seal seat and communicated with the annular cavity (12); sealing rings are respectively arranged between the front machine sealing seat (5) and the pump body (1), between the front machine sealing seat (5) and the rear machine sealing seat (6) and between the driving ring seat (7) and the rotating shaft (2); the driving ring seat (7) is provided with a fixed connection mechanism between the extension section of the driving ring seat, which extends out of the machine sealing seat, and the rotating shaft (2).
2. The double-ended shaft sealing device according to claim 1, characterized in that the compression spring (11) is a single conventional large spring or wave spring sleeved outside the rotating shaft (2); or the compression springs (11) are a plurality of small springs uniformly distributed along the outer circumference of the rotating shaft (2).
3. The double-ended shaft sealing device according to claim 1, wherein a spring washer (14) is respectively added in the annular cavities, and at least one end of the compression spring (11) is propped against one side of the spring washer (14).
4. The double-end-face shaft sealing device according to claim 1, wherein the inner side of the pump of the drive ring seat (7) is provided with at least 2 convex ribs (15) along the circumference of the inner wall thereof, and the front ring (8) is provided with corresponding depressions (16) along the circumference of the outer side wall thereof; at least 2 convex ribs (15) are arranged on the inner side of the secondary moving ring seat (9) along the circumference of the inner wall of the secondary moving ring seat, and corresponding concave grooves (16) are arranged on the rear moving ring (10) along the circumference of the outer side wall of the rear moving ring seat.
5. The double-end-face shaft sealing device according to claim 4, wherein 4 convex ribs (15) are uniformly distributed on the inner side of the pump of the driving ring seat (7) along the circumference of the inner wall of the driving ring seat, and 4 corresponding concave recesses (16) are uniformly distributed on the front moving ring (8) along the circumference of the outer side wall of the front moving ring; the inner side of the pump of the secondary moving ring seat (9) is uniformly provided with 4 convex ribs (15) along the circumference of the inner wall of the pump, and the rear moving ring (10) is uniformly provided with 4 corresponding depressions (16) along the circumference of the outer side wall of the rear moving ring.
6. The double-end-face shaft sealing device according to claim 1, wherein the front sealing seat (5) comprises an extending part (17) and a flange end (18), 1 pair of pin holes (19) are symmetrically formed in the extending part (17) of the front sealing seat (5), 1 pair of corresponding notch grooves (20) are symmetrically formed in the inner side of the front static ring (3) pump, and 1 pair of pins (33) penetrate through the pin holes (19) of the front sealing seat (5) and are inserted into the notch grooves (20) of the front static ring (3) to realize connection of the two; the rear machine seal seat (6) comprises a cylinder body and a flange end (18), the flange ends (18) of the front machine seal seat (5) and the rear machine seal seat (6) are provided with a plurality of connecting holes (22) along the circumference of the flange ends, and the flange ends are fixedly connected with the outer side of the pump body (1) through a plurality of connecting bolts; the outer side of the pump of the barrel body of the rear seal seat (6) is symmetrically provided with 1 pair of pin holes (19), the outer side of the pump of the rear static ring (4) is symmetrically provided with 1 pair of corresponding notch grooves (20), and 1 pair of pins (33) are inserted into the notch grooves (20) of the rear static ring (4) through the pin holes (19) of the rear seal seat (6) to realize the connection of the two.
7. The double-end-face shaft sealing device according to claim 1, wherein the cylinder body of the driving ring seat (7) is symmetrically provided with 1 pair of pin holes (19), the secondary ring seat (9) is symmetrically provided with 1 pair of corresponding notch grooves (20), and 1 pair of pins (33) penetrate through the notch grooves (20) of the secondary ring seat (9) and are inserted into the pin holes (19) of the driving ring seat (7) to realize connection of the two.
8. The double-end-face shaft sealing device according to claim 1, wherein the sealing ring comprises a first O-ring (23) clamped between the front static ring (3) and the inner cavity wall of the front machine sealing seat (5), a second O-ring (24) clamped between the front moving ring (8) and the rotating shaft (2), a third O-ring (25) clamped between the driving ring seat (7) and the rotating shaft (2), a fourth O-ring (26) clamped between the rear static ring (4) and the inner cavity wall of the rear machine sealing seat (6), a fifth O-ring (27) clamped between the rear moving ring (10) and the outer wall of the cylinder body of the driving ring seat (7), a sixth O-ring (28) clamped between the front machine sealing seat (5) and the side wall of the pump body (1), and a seventh O-ring (29) clamped between the front machine sealing seat (5) and the rear machine sealing seat (6).
9. The double-end-face shaft sealing device according to claim 1, wherein the fixed connection mechanism between the driving ring seat (7) and the rotating shaft (2) comprises a fixed sleeve (30) sleeved on the outer side of the driving ring seat (7) pump, 1 pair of jacking threaded holes (31) are symmetrically formed in the fixed sleeve (30), 1 pair of through holes (34) are symmetrically formed in the extending section of the driving ring seat (7), and 1 pair of jacking screws (32) matched with the jacking threaded holes (31) of the fixed sleeve (30) respectively penetrate through the through holes (34) of the driving ring seat (7) to jack the rotating shaft (2).
10. The double-end-face shaft sealing device according to claim 9, wherein the rotating shaft (2) is provided with a pit at the position of a jacking screw (32), and the jacking screw (32) jacks into the pit.
11. The double-end-face shaft sealing device according to claim 1, wherein wear-resistant layers are sprayed on the contact surface of the front static ring (3) and the front moving ring (8) and the contact surface of the rear static ring (4) and the rear moving ring (10).
12. The double-end-face shaft sealing device according to claim 1, wherein the annular cavity (12) between the mechanical seal seat and the movable ring assembly forms a cooling fluid circulation system with the outside through the cooling fluid inlet and outlet (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810810849.3A CN108843614B (en) | 2018-07-23 | 2018-07-23 | Double-end-face shaft sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810810849.3A CN108843614B (en) | 2018-07-23 | 2018-07-23 | Double-end-face shaft sealing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108843614A CN108843614A (en) | 2018-11-20 |
| CN108843614B true CN108843614B (en) | 2024-06-07 |
Family
ID=64196756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810810849.3A Active CN108843614B (en) | 2018-07-23 | 2018-07-23 | Double-end-face shaft sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108843614B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202597215U (en) * | 2012-03-27 | 2012-12-12 | 上海阿波罗机械股份有限公司 | Mechanical seal for coolant drain tank pump |
| CN103574039A (en) * | 2012-07-18 | 2014-02-12 | 苏州立德泵技术研究院有限公司 | Embedded double-sealing device without sealing cover |
| CN203783955U (en) * | 2014-04-22 | 2014-08-20 | 苏瑞益 | Double-end-face packaging mechanical seal |
| CN205243929U (en) * | 2015-12-22 | 2016-05-18 | 四川丹罗斯环保科技有限公司 | Desulfurization pump double mechanical seal device |
| CN208651257U (en) * | 2018-07-23 | 2019-03-26 | 余姚市华泰邦威泵业有限公司 | A kind of Double End shaft sealer |
-
2018
- 2018-07-23 CN CN201810810849.3A patent/CN108843614B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202597215U (en) * | 2012-03-27 | 2012-12-12 | 上海阿波罗机械股份有限公司 | Mechanical seal for coolant drain tank pump |
| CN103574039A (en) * | 2012-07-18 | 2014-02-12 | 苏州立德泵技术研究院有限公司 | Embedded double-sealing device without sealing cover |
| CN203783955U (en) * | 2014-04-22 | 2014-08-20 | 苏瑞益 | Double-end-face packaging mechanical seal |
| CN205243929U (en) * | 2015-12-22 | 2016-05-18 | 四川丹罗斯环保科技有限公司 | Desulfurization pump double mechanical seal device |
| CN208651257U (en) * | 2018-07-23 | 2019-03-26 | 余姚市华泰邦威泵业有限公司 | A kind of Double End shaft sealer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108843614A (en) | 2018-11-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203770645U (en) | Two-end-surface mechanical seal device | |
| CN103016391B (en) | A kind of mechanically-sealing apparatus of high pressure water-injection pump | |
| CN110259952B (en) | Rotary dynamic sealing device of centrifugal machine | |
| JP7215829B2 (en) | SHAFT COUPLING AND ROTATING DEVICE INCLUDING THE SHAFT COUPLING | |
| CN108843614B (en) | Double-end-face shaft sealing device | |
| CN105114631A (en) | Shaft end sealing device and fluid conveying equipment | |
| CN113007128B (en) | Mechanical sealing device for wear-resistant corrosion-resistant chemical pump | |
| CN110319022B (en) | Experimental testing device with adjustable front and rear cover plate gaps of centrifugal pump | |
| CN201053499Y (en) | Mechanical seal with fork | |
| CN215762412U (en) | Mechanical sealing device for slurry pump | |
| CN113503128B (en) | All-metal concentric forced flow distribution positive displacement downhole motor | |
| CN210372011U (en) | Extendable and rotatable mechanical seal | |
| CN208651257U (en) | A kind of Double End shaft sealer | |
| CN202483895U (en) | Multiple-group magnetic drive pump | |
| CN212616303U (en) | Mechanical sealing structure | |
| US3152807A (en) | Mechanical seals with inspection means | |
| CN200943607Y (en) | High temperature multi-stage eccentric pump for chemical industry | |
| CN215891119U (en) | Single-spring axially-adjustable slurry pump mechanical sealing device | |
| CN202326267U (en) | Two-stage chemical engineering process pump | |
| CN111396661A (en) | Chemical liquid pipeline flange | |
| CN201434073Y (en) | Deslagging type rotating ring structure used in mechanical seal | |
| CN220435025U (en) | Dry-type screw vacuum pump seal structure | |
| CN204572545U (en) | A kind of mechanical seal meeting ansi standard pump chamber | |
| CN109386462B (en) | Rotor pump shaft sealing device | |
| CN217683242U (en) | Shaft extension end Roots blower container mechanical seal structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Country or region after: China Address after: 315414 Luojiang village, Hemudu Town, Yuyao City, Ningbo City, Zhejiang Province Applicant after: Zhejiang Huatai Bangwei Pump Co.,Ltd. Address before: 315414 Bangwei Pump Industry Company, Luojiang Industrial Zone, Hemudu Town, Yuyao City, Ningbo City, Zhejiang Province Applicant before: YUYAO HUATAI BANGWEI PUMP INDUSTRY Co.,Ltd. Country or region before: China |
|
| GR01 | Patent grant |