CN118188568B - Shaft end mechanical sealing device of chemical centrifugal pump and application method thereof - Google Patents
Shaft end mechanical sealing device of chemical centrifugal pump and application method thereof Download PDFInfo
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- CN118188568B CN118188568B CN202410586752.4A CN202410586752A CN118188568B CN 118188568 B CN118188568 B CN 118188568B CN 202410586752 A CN202410586752 A CN 202410586752A CN 118188568 B CN118188568 B CN 118188568B
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- 238000007789 sealing Methods 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000000126 substance Substances 0.000 title claims abstract description 13
- 230000003068 static effect Effects 0.000 claims abstract description 17
- 230000000694 effects Effects 0.000 claims abstract description 13
- 238000005299 abrasion Methods 0.000 claims abstract description 7
- 239000012530 fluid Substances 0.000 claims abstract description 5
- 239000004576 sand Substances 0.000 claims abstract description 5
- 230000033001 locomotion Effects 0.000 claims description 11
- 230000005540 biological transmission Effects 0.000 claims description 10
- 230000007246 mechanism Effects 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims 1
- 230000001360 synchronised effect Effects 0.000 claims 1
- 239000004575 stone Substances 0.000 abstract description 3
- 238000001125 extrusion Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 239000013589 supplement Substances 0.000 description 2
- 230000001502 supplementing effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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- 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
- F04D29/106—Shaft sealings especially adapted for liquid pumps
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- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
Abstract
The invention relates to the field of centrifugal pump sealing. The invention discloses a shaft end mechanical sealing device of a chemical centrifugal pump and a use method thereof, and aims to solve the problem that the existing centrifugal pump improves the sealing effect in the operation process of a pump body through contact between a movable ring and a static ring, and when the movable ring is driven to rotate by a driving shaft due to extrusion of a spring, a small gap can appear between the movable ring and the static ring, so that fine quicksand in fluid enters the space between the movable ring and the static ring to cause abrasion of the movable ring and the static ring to be large, and the use of a sealing ring and the sealing effect of the pump body are affected. When the pump body runs, the movable ring and the static ring can be effectively contacted to avoid abrasion caused by micro fine sand stone contained in fluid entering the space between the movable ring and the static ring, and the sealing ring can be effectively compensated after the pump body runs.
Description
Technical Field
The invention relates to the field of centrifugal pump sealing, in particular to a mechanical sealing device for a shaft end of a chemical centrifugal pump and a use method thereof.
Background
Centrifugal pumps operate by using rotation of an impeller to cause centrifugal movement of water. Before the water pump is started, the pump shell and the water suction pipe are filled with water, then the motor is started, the pump shaft drives the impeller and the water to do high-speed rotation movement, the water is centrifugally moved and thrown to the outer edge of the impeller, and the water flows into the water pressing pipeline of the water pump through the runner of the volute pump shell.
The prior patent (publication number: CN 116857220B) discloses a mechanical sealing device at the shaft end of a chemical centrifugal pump, which comprises a second pump shell and further comprises: the device comprises a driving shaft, a fixed disc, a rotating shaft, a sealing disc and a first spring; the driving shaft is rotationally connected to the second pump shell, a columnar sealing cavity is arranged on the second pump shell, and a sinking groove is arranged at one end, close to the first pump shell, of the sealing cavity; the fixed disc is fixed on the sinking groove, an annular static ring is arranged in the sinking groove, and the rotating shaft is rotationally connected to the fixed disc; the sealing disc is movably arranged in the sealing cavity. The first spring promotes the sealing disk, and then makes sealing disk and fixed disk sealing connection, and when the sealing disk rotated, sealing disk and fixed disk formed the terminal surface seal, even when the liquid in the pump flowed through the gap between fixed disk and the axis of rotation, also can not follow sealing disk and fixed disk flow department pump outward to improve centrifugal pump's leakproofness. In the process of implementing the present invention, the inventor finds that at least the following problems in the prior art are not solved: the existing centrifugal pump improves the sealing effect in the operation process of the pump body through the contact of the movable ring and the static ring, and when the movable ring is only extruded by adopting a spring to cause the movable ring to rotate under the drive of the driving shaft, a small gap can appear between the movable ring and the static ring, so that small quicksand in fluid can enter the space between the movable ring and the static ring to cause the abrasion of the movable ring and the static ring to become large, and the use of a sealing ring and the sealing effect of the pump body are affected.
Disclosure of Invention
The invention aims to provide a shaft end mechanical sealing device of a chemical centrifugal pump and a use method thereof, so as to solve the problems in the background technology. In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a shaft end mechanical seal device of chemical industry centrifugal pump, includes the casing that sets up, be connected with the pump case on the casing, set up the inner chamber in the pump case, be provided with the card chamber on the casing with the pump case corresponds, the one end of pump case is connected with the driver, and driver and pump case normal running fit.
Preferably, the driving piece comprises a driving shaft which is rotatably arranged on the pump shell, a first connecting plate and a second connecting plate are fixedly connected in an inner cavity of the pump shell, the driving shaft extends towards the first connecting plate and the second connecting plate, a driving disc is fixedly connected on the driving shaft, a chuck is arranged on the driving disc in a clamping mode, a movable ring is arranged on the chuck, a pressure spring is arranged between the chuck and the second connecting plate, a stationary ring which corresponds to the movable ring is arranged in a clamping cavity of the shell, and the movable ring and the stationary ring are both sealing ring mechanisms.
Preferably, the first connecting plate is further provided with a transmission part in transmission fit with the driving shaft, the transmission part comprises an outer sleeve disc fixedly arranged on the driving shaft, a pawl is slidably arranged on the outer sleeve disc, a pressure spring is arranged between the pawl and the outer sleeve disc, the first connecting plate is rotatably provided with a ratchet disc, and the pawl is in contact with the ratchet disc.
Preferably, the outer wall of the first connecting plate is further provided with an annular frame, a plurality of groups of clamping grooves are distributed on the inner wall of the annular frame around the circumference of the annular frame, a spring piece is arranged in the annular frame, the spring piece is connected with the outer wall of the ratchet plate, one end of the spring piece is provided with a clamping groove contact on the buckle and the annular frame, the end part of the ratchet plate is further fixedly provided with a rotary gear, the rotary gear is in running fit with the first connecting plate, the first connecting plate is connected with the second connecting plate through two groups of fixing rods, and moving parts are oppositely arranged on two sides of the rotary gear on the first connecting plate.
Preferably, the two sets of moving parts all include the locating lever of relative fixed setting between first connecting plate and second connecting plate, rotate between first connecting plate and the second connecting plate and be provided with the hob, one side of hob is provided with the rotation gear rather than the rotation gear meshing, still be provided with on the hob rather than screw thread complex thread bush, the last rotation of thread bush is provided with the spacing, spacing and two sets of locating lever sliding fit.
Preferably, a limiting block is longitudinally arranged on the limiting frame in a sliding manner, a limiting groove which is clamped with the limiting block is formed in the outer wall of the threaded sleeve, an abutting spring is arranged between the limiting block and the limiting frame, a wedge-shaped plate is also transversely arranged on the limiting frame in a sliding manner, a V-shaped sliding groove is formed in the wedge-shaped plate, and a clamping rod matched with the V-shaped sliding groove on the wedge-shaped plate is arranged on the limiting block.
Preferably, two sets of the fixing rods extend to the circle center of the second connecting plate, the two sets of the brackets are provided with adjusting gears in a rotating mode, the end face of the second connecting plate is provided with a supporting frame which is arranged in a sliding mode, an elastic spring is arranged between the supporting frame and the second connecting plate, the outer wall of the supporting frame is in contact with the limiting block, and the two sets of supporting frames are further provided with movable racks meshed with the adjusting gears.
Preferably, the locating plate is fixedly arranged on the end face of the opposite side of the second connecting plate, which is opposite to the adjusting gear, the rotating disk is rotationally arranged on the locating plate, the rotating disk is connected with the adjusting gear, three groups of inclined arc grooves are distributed on the rotating disk around the circumference of the rotating disk, clamping rods are arranged in the three groups of inclined arc grooves, the three groups of clamping rods are in sliding fit with the outer wall of the locating plate, the three groups of clamping rods are in contact with the inner wall of the movable ring, the side edge of the chuck is in inclined arrangement, and the chuck is in contact with the abutting frame.
Preferably, the application method of the mechanical sealing device at the shaft end of the chemical centrifugal pump comprises the following steps:
S1: when the centrifugal pump is in use, the driving shaft rotates to drive the driving disc to rotate, the driving disc rotates to enable the chuck clamped on the driving disc to rotate, the chuck rotates to drive the movable ring to rotate, and the movable ring rotates to be in contact with the stationary ring in the shell, so that the sealing effect in the operation process of the pump body is achieved;
S2: when the driving shaft rotates, the driving shaft rotates to drive the outer sleeve disc to rotate, pawls which are arranged by rotating the outer sleeve disc are contacted with the ratchet disc to drive the ratchet disc to synchronously rotate, the ratchet disc rotates to drive the rotating gear to rotate, the rotating gear rotates to drive the two groups of moving parts to synchronously move, and the two groups of moving parts can be synchronously driven while the driving shaft rotates through the arrangement, so that the movable ring can be conveniently clamped by the two groups of moving parts;
S3: under the drive of the rotary gear, the rotary gear drives the rotary gear to rotate, the rotary gear drives the screw rod to rotate, the screw sleeve moves towards the second connecting plate from the first connecting plate under the limit of the limiting frame and the positioning rod when the screw rod rotates, when the wedge plate on the limiting frame contacts with the outer wall of the second connecting plate, the wedge plate slides in the limiting frame and contacts with the clamping rod on the limiting block through the V-shaped sliding groove, so that the limiting block moves on the limiting frame, at the moment, the limiting block is not clamped with the limiting groove on the screw sleeve any more, the limit of the limiting frame to the screw sleeve is relieved, only the screw sleeve can be driven to rotate when the screw rod rotates, and when the screw rod rotates to drive the screw sleeve to move through the arrangement, the movement can be converted into rotary motion after contacting with the outer wall of the second connecting plate, and the continuous rotation of the screw rod is avoided, so that the limiting frame is blocked by the contact with the second connecting plate;
S4: when the limiting block moves on the limiting frame, the limiting block is positioned at the side of the abutting frame, the limiting block moves out to the limiting frame and then contacts with the abutting frame, the abutting frame is driven to move, the abutting frame drives the movable rack to move, the movable rack moves to drive the adjusting gear to rotate, the adjusting gear rotates to drive the rotating disc to rotate, when the rotating disc rotates, three groups of clamping rods can be enabled to move through three groups of oblique arc grooves, the clamping rods slide on the positioning disc to be positioned and locked at the inner wall of the moving ring, the moving ring can be contacted and attached with the chuck, the chuck can drive the moving ring to rotate and attach with the stationary ring when rotating, the sealing effect of the moving ring and the stationary ring can be enhanced through the arrangement, and in the continuous rotating process of the driving shaft, the spiral rod can also synchronously and continuously rotate, so that the limiting frame is enabled to be continuously contacted with the outer wall of the second connecting plate, and loosening of the clamping rods can be avoided when the moving ring and the stationary ring;
S5: when the centrifugal pump stops working, when the driving shaft does not rotate any more, the spring piece can reset, the ratchet disc can be driven to rotate in the spring piece resetting process, the pawl can not be driven to rotate the driving shaft when the ratchet disc rotates, the rotating gears can rotate to enable the two groups of rotating gears to reversely rotate along with the rotation of the ratchet disc, when the rotating gears reversely rotate, the limiting block can reset under the driving of the abutting springs, the limiting block resets and the clamping groove on the threaded sleeve can drive the threaded sleeve to reset to the first connecting plate, and meanwhile the abutting frame resets under the driving of the elastic springs, the adjusting gears can be rotated through the movable racks, further the clamping rod can not lock the movable ring any more, after the movable ring is locked, the movable ring is pushed to be supplemented through the set pressure spring, further the supplement operation of the movable ring after the operation of the pump body is realized, the movable ring and the stationary ring can be effectively contacted and prevented from entering the movable ring and the stationary ring to cause the abrasion after the operation of the pump body.
Compared with the prior art, the invention has the beneficial effects that:
According to the invention, under the drive of the rotary gear, the rotary gear drives the rotary gear to rotate, the rotary gear drives the screw rod to rotate, the screw sleeve moves from the first connecting plate to the second connecting plate under the limit of the limiting frame and the positioning rod when the screw rod rotates, when the wedge plate on the limiting frame contacts with the outer wall of the second connecting plate, the wedge plate slides in the limiting frame and contacts with the clamping rod on the limiting block through the V-shaped sliding groove, so that the limiting block moves on the limiting frame, at the moment, the limiting block is not clamped with the limiting groove on the screw sleeve any more, the limit of the limiting frame to the screw sleeve is released, only the screw sleeve can be driven to rotate when the screw rod rotates to drive the screw sleeve to move through the arrangement, and the movement can be converted into rotary motion after the wedge plate contacts with the outer wall of the second connecting plate, so that the limiting frame is prevented from being clamped due to continuous rotation of the screw rod.
According to the invention, after the limiting block moves on the limiting frame, the limiting block is positioned at the side of the abutting frame, at the moment, the limiting block moves out to the limiting frame and then contacts with the abutting frame, the limiting block drives the abutting frame to move, the abutting frame drives the moving rack to move, the moving rack moves to drive the adjusting gear to rotate, the adjusting gear rotates to drive the rotating disc to rotate, when the rotating disc rotates, three groups of clamping rods can move through three groups of oblique arc grooves, the clamping rods slide on the positioning disc to the inner wall of the moving ring to perform positioning locking, so that the moving ring can contact and joint with the chuck, the chuck can drive the moving ring to rotate and joint with the stationary ring when rotating, joint treatment can be effectively performed on the moving ring and the stationary ring through the arrangement, the sealing effect of the moving ring and the stationary ring can be enhanced through the clamping rods, and in the continuous rotation process of the driving shaft, the spiral rod can continuously rotate synchronously, the pressure of the limiting frame can be continuously provided, the limiting frame can be continuously contacted with the outer wall of the second connecting plate, and loosening of the clamping rods can be avoided when the moving ring and the stationary ring are operated.
When the centrifugal pump stops working, the spring leaf can reset when the driving shaft does not rotate any more, the ratchet disc can be driven to rotate in the spring leaf resetting process, the pawl can not be driven to rotate when the ratchet disc rotates to enable the driving shaft to rotate, the gears can be rotated to enable the two groups of rotating gears to reversely rotate along with the rotation of the ratchet disc, the limiting block can reset under the driving of the abutting spring when the rotating gears reversely rotate, the limiting block resets and is clamped with the clamping groove on the threaded sleeve to enable the threaded sleeve to reset to the first connecting plate, meanwhile, the abutting frame resets under the driving of the elastic spring, the adjusting gear can be rotated through the moving rack, the clamping rod can not lock the movable ring any more, after the movable ring is contacted with the locking of the movable ring, the movable ring is pushed to be supplemented through the pressure spring, and then the supplement operation of the movable ring after the operation of the pump body is achieved, when the pump body is operated, the movable ring and the static ring can be effectively contacted with the movable ring to avoid the miniature fine sand contained in fluid from entering the space between the pump body and the movable ring to wear the movable ring, and the static ring can effectively compensate the sealing ring after the operation.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic view of a partial perspective view of the present invention;
FIG. 3 is a schematic perspective view of a driving member according to the present invention;
FIG. 4 is a schematic view of a partial perspective view of a driving member according to the present invention;
FIG. 5 is a partial perspective view of the present invention;
FIG. 6 is a partial perspective view of a moving member of the present invention;
FIG. 7 is a schematic diagram of a partial perspective view of a second embodiment of the present invention;
FIG. 8 is a schematic view of a partial perspective view of a third embodiment of the present invention;
fig. 9 is a partial perspective view of the present invention.
In the figure: 1. a housing; 11. a pump housing; 2. a driving member; 21. a drive shaft; 22. a first connection plate; 23. a second connecting plate; 24. a drive plate; 25. a chuck; 26. a moving ring; 27. a pressure spring; 28. a stationary ring; 3. a transmission member; 31. a jacket plate; 32. a pawl; 33. a pressure spring; 34. a ratchet plate; 35. an annular frame; 36. a clamping groove; 37. a spring piece; 38. a buckle; 39. a rotary gear; 391. a fixed rod; 4. a moving member; 41. a positioning rod; 42. a screw rod; 43. rotating the gear; 44. a thread sleeve; 45. a limiting frame; 46. a limiting block; 47. a limit groove; 48. a contact spring; 49. wedge plate; 491. v-shaped sliding grooves; 492. a clamping rod; 5. a bracket; 51. an adjusting gear; 52. a supporting frame; 53. an elastic spring; 54. moving the rack; 55. a positioning plate; 56. a rotating disc; 57. an oblique arc groove; 58. and a locking rod.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which are obtained by a worker of ordinary skill in the art without creative efforts, are within the protection scope of the present invention based on the embodiments of the present invention.
Referring to fig. 1 to 9, the present invention provides a technical solution: the utility model provides a shaft end mechanical seal device of chemical industry centrifugal pump, includes the casing 1 that sets up, be connected with pump case 11 on the casing 1, the inner chamber has been seted up in the pump case 11, be provided with the card chamber on the casing 1 with pump case 11 corresponds, the one end of pump case 11 is connected with driver 2, and driver 2 and pump case 11 normal running fit.
In this embodiment, as shown in fig. 1,2 and 9, the driving part 2 includes a driving shaft 21 rotatably disposed on a pump casing 11, a first connecting plate 22 and a second connecting plate 23 are fixedly connected in an inner cavity of the pump casing 11, the driving shaft 21 extends to the first connecting plate 22 and the second connecting plate 23, a driving disc 24 is fixedly connected to the driving shaft 21, a chuck 25 is clamped on the driving disc 24, a moving ring 26 is disposed on the chuck 25, a pressure spring 27 is disposed between the chuck 25 and the second connecting plate 23, a stationary ring 28 disposed corresponding to the moving ring 26 is disposed in a clamping cavity of the casing 1, and the moving ring 26 and the stationary ring 28 are both sealing ring mechanisms; when the centrifugal pump is in use, the driving shaft 21 rotates to drive the driving disc 24 to rotate, the driving disc 24 rotates to enable the chuck 25 clamped on the driving disc 24 to rotate, the chuck 25 rotates to drive the movable ring 26 to rotate, the movable ring 26 rotates to be in contact with the stationary ring 28 in the shell 1, and then the sealing effect in the operation process of the pump body is achieved.
In this embodiment, as shown in fig. 1, 2, 3 and 4, the first connecting plate 22 is further provided with a transmission member 3 in transmission fit with the driving shaft 21, the transmission member 3 includes an outer sleeve disc 31 fixedly disposed on the driving shaft 21, a pawl 32 is slidably disposed on the outer sleeve disc 31, a compression spring 33 is disposed between the pawl 32 and the outer sleeve disc 31, a ratchet disc 34 is rotatably disposed on the first connecting plate 22, and the pawl 32 contacts with the ratchet disc 34;
The outer wall of the first connecting plate 22 is further provided with an annular frame 35, a plurality of groups of clamping grooves 36 are distributed on the inner wall of the annular frame 35 around the circumference of the annular frame 35, a spring piece 37 is arranged in the annular frame 35, the spring piece 37 is connected with the outer wall of the ratchet plate 34, one end of the spring piece 37 is provided with a clamping buckle 38 to be in contact with the clamping groove 36 on the annular frame 35, the end part of the ratchet plate 34 is further fixedly provided with a rotary gear 39, the rotary gear 39 is in rotary fit with the first connecting plate 22, the first connecting plate 22 is connected with the second connecting plate 23 through two groups of fixing rods 391, and moving pieces 4 are oppositely arranged on two sides of the rotary gear 39 on the first connecting plate 22;
When the driving shaft 21 rotates, the driving shaft 21 rotates to drive the outer sleeve disc 31 to rotate, the pawl 32 rotatably arranged on the outer sleeve disc 31 contacts with the ratchet disc 34 to drive the ratchet disc 34 to synchronously rotate, the ratchet disc 34 rotates to drive the rotary gear 39 to rotate, the rotary gear 39 rotates to drive the two groups of moving parts 4 to synchronously move, and the driving shaft 21 rotates and simultaneously drives the two groups of moving parts 4 to synchronously drive the movable ring 26 conveniently to be clamped by the two groups of moving parts 4;
When the pawl 32 drives the ratchet plate 34 to rotate, the ratchet plate 34 rotates to drive the spring piece 37 to be stressed continuously, and when the spring piece 37 is stressed gradually to the maximum state, the buckles 38 on the spring piece 37 of the ratchet plate 34 are contacted with the clamping grooves 36 on the annular frame 35, and the plurality of groups of clamping grooves 36 arranged on the annular frame 35 can play a role in protection to prevent the spring piece 37 from being clamped continuously under stress.
In this embodiment, as shown in fig. 2, 5, 6 and 7, each of the two sets of moving members 4 includes a positioning rod 41 disposed between the first connection plate 22 and the second connection plate 23, which are relatively fixed, a screw rod 42 is rotatably disposed between the first connection plate 22 and the second connection plate 23, a rotating gear 43 meshed with the rotating gear 39 is disposed on one side of the screw rod 42, a threaded sleeve 44 in threaded engagement with the screw rod 42 is further disposed on the screw rod 42, a limiting frame 45 is rotatably disposed on the threaded sleeve 44, and the limiting frame 45 is slidably engaged with the two sets of positioning rods 41;
A limiting block 46 is longitudinally and slidably arranged on the limiting frame 45, a limiting groove 47 which is clamped with the limiting block 46 is formed in the outer wall of the threaded sleeve 44, an abutting spring 48 is arranged between the limiting block 46 and the limiting frame 45, a wedge plate 49 is also transversely and slidably arranged on the limiting frame 45, a V-shaped sliding groove 491 is formed in the wedge plate 49, and a clamping rod 492 which is matched with the V-shaped sliding groove 491 on the wedge plate 49 is arranged on the limiting block 46;
Under the drive of the rotary gear 39, the rotary gear 39 drives the rotary gear 43 to rotate, the rotary gear 43 rotates to drive the screw rod 42 to rotate, when the screw rod 42 rotates, the screw sleeve moves from the first connecting plate 22 to the second connecting plate 23 under the limit of the limit frame 45 and the positioning rod 41, when the wedge plate 49 on the limit frame 45 contacts with the outer wall of the second connecting plate 23, the wedge plate 49 slides in the limit frame 45 and contacts with the clamping rod 492 on the limiting block 46 through the V-shaped sliding groove 491, so that the limiting block 46 moves on the limit frame 45, and at the moment, the limiting block 46 is not clamped with the limiting groove 47 on the screw sleeve 44 any more, the limit of the limit frame 45 to the screw sleeve 44 is released, and when the screw rod 42 rotates to drive the screw sleeve 44 to move, the movement can be converted into rotary movement after the wedge plate 49 contacts with the outer wall of the second connecting plate 23, so that the continuous rotation of the screw rod 42 is avoided, and the limiting frame 45 contacts with the second connecting plate 23, and the limiting block is blocked.
In this embodiment, as shown in fig. 2, 5, 6, 7 and 8, two sets of fixing rods 391 extend to the center of the second connecting plate 23, two sets of brackets 5 are rotatably provided with adjusting gears 51, the end surface of the second connecting plate 23 is provided with a supporting frame 52 which is relatively slidably arranged, an elastic spring 53 is arranged between the supporting frame 52 and the second connecting plate 23, the outer wall of the supporting frame 52 contacts with the limiting block 46, and two sets of supporting frames 52 are also provided with moving racks 54 meshed with the adjusting gears 51;
A positioning disc 55 is fixedly arranged on the end surface of the second connecting plate 23, which is positioned on the other side opposite to the adjusting gear 51, a rotating disc 56 is rotatably arranged on the positioning disc 55, the rotating disc 56 is connected with the adjusting gear 51, three groups of inclined arc grooves 57 are distributed on the rotating disc 56 around the circumference of the rotating disc 56, clamping rods 58 are arranged in the three groups of inclined arc grooves 57, the three groups of clamping rods 58 are in sliding fit with the outer wall of the positioning disc 55, the three groups of clamping rods 58 are in contact with the inner wall of the movable ring 26, the side edge of the chuck 25 is obliquely arranged, and the chuck 25 is in contact with the abutting frame 52;
When the limiting block 46 moves on the limiting frame 45, the limiting block 46 is positioned at the side of the abutting frame 52, at the moment, the limiting block 46 moves out to the limiting frame 45 and then contacts with the abutting frame 52, the limiting block 46 drives the abutting frame 52 to move, the abutting frame 52 drives the moving rack 54 to move, the moving rack 54 moves to drive the adjusting gear 51 to rotate, the adjusting gear 51 rotates to drive the rotating disc 56 to rotate, when the rotating disc 56 rotates, three groups of clamping rods 58 can be enabled to move through three groups of inclined arc grooves 57, the clamping rods 58 slide on the positioning disc 55 to the inner wall of the moving ring 26 to perform positioning locking, the moving ring 26 can be enabled to be in contact with and fit with the chuck 25, the moving ring 26 can be driven to rotate and be in fit with the stationary ring 28 when the chuck 25 rotates, the sealing effect of the moving ring 26 and the stationary ring 28 can be effectively enhanced through the arrangement of the clamping rods 58, and in the continuous rotation of the driving shaft 21, the spiral rod 42 can continuously provide pressure of the limiting frame 45, the limiting frame 45 can be enabled to be in contact with the outer wall of the second connecting plate 23 and the moving ring 26 and the stationary ring 28 can be prevented from loosening when the clamping rod 28 is continuously rotated;
When the centrifugal pump stops working, when the driving shaft 21 does not rotate any more, the spring piece 37 resets, the spring piece 37 can drive the ratchet plate 34 to rotate in the resetting process, the ratchet plate 34 can not drive the pawl 32 to rotate the driving shaft 21 when rotating, the rotating gear 39 can rotate the two groups of rotating gears 43 reversely along with the rotation of the ratchet plate 34, when the rotating gears 43 reversely rotate, the limiting block 46 can reset the limiting block 46 under the driving of the abutting springs 48, the limiting block 46 resets and is clamped with the clamping grooves 36 on the threaded sleeve 44, the threaded sleeve 44 is driven to reset to the first connecting plate 22, the abutting frame 52 is reset under the driving of the elastic springs 53, the adjusting gear 51 can be rotated by moving the rack 54, the clamping rod 58 can not lock the moving ring 26 any more, after the moving ring 26 is locked, the moving ring 26 is pushed to be supplemented by the arranged pressure springs 27, and the supplementing operation of the moving ring 26 after the pump body in the operation process is realized, the moving ring 26 and the moving ring 28 can effectively contact with the miniature sand stone 26 and the moving ring 28 in the operation process, and the abrasion of the pump body can be effectively compensated after the moving ring 28.
The application method and the advantages of the invention are as follows: the application method of the shaft end mechanical sealing device of the chemical centrifugal pump comprises the following working processes:
As shown in fig. 1, 2,3, 4,5, 6, 7, 8:
S1: when the centrifugal pump is in use, the driving shaft 21 rotates to drive the driving disc 24 to rotate, the driving disc 24 rotates to enable the chuck 25 clamped on the driving disc 24 to rotate, the chuck 25 rotates to drive the movable ring 26 to rotate, and the movable ring 26 rotates to be in contact with the stationary ring 28 in the shell 1, so that a sealing effect in the operation process of the pump body is achieved;
S2: when the driving shaft 21 rotates, the driving shaft 21 rotates to drive the outer sleeve disc 31 to rotate, the pawl 32 rotatably arranged on the outer sleeve disc 31 contacts with the ratchet disc 34 to drive the ratchet disc 34 to synchronously rotate, the ratchet disc 34 rotates to drive the rotary gear 39 to rotate, the rotary gear 39 rotates to drive the two groups of moving parts 4 to synchronously move, and the driving shaft 21 rotates and simultaneously drives the two groups of moving parts 4 to synchronously drive the movable ring 26 conveniently to be clamped by the two groups of moving parts 4;
S3: under the drive of the rotary gear 39, the rotary gear 39 drives the rotary gear 43 to rotate, the rotary gear 43 rotates to drive the screw rod 42 to rotate, when the screw rod 42 rotates, the screw sleeve moves from the first connecting plate 22 to the second connecting plate 23 under the limit of the limit frame 45 and the positioning rod 41, when the wedge plate 49 on the limit frame 45 contacts with the outer wall of the second connecting plate 23, the wedge plate 49 slides in the limit frame 45 and contacts with the clamping rod 492 on the limiting block 46 through the V-shaped sliding groove 491, so that the limiting block 46 moves on the limit frame 45, and at the moment, the limiting block 46 is not clamped with the limiting groove 47 on the screw sleeve 44 any more, the limit of the limit frame 45 to the screw sleeve 44 is released, and when the screw rod 42 rotates to drive the screw sleeve 44 to move, the movement can be converted into rotary movement after the continuous rotation of the screw rod 42, so that the limiting frame 45 contacts with the second connecting plate 23 is prevented from being blocked;
S4: when the limiting block 46 moves on the limiting frame 45, the limiting block 46 is positioned at the side of the abutting frame 52, at the moment, the limiting block 46 moves out to the limiting frame 45 and then contacts with the abutting frame 52, the limiting block 46 drives the abutting frame 52 to move, the abutting frame 52 drives the moving rack 54 to move, the moving rack 54 moves to drive the adjusting gear 51 to rotate, the adjusting gear 51 rotates to drive the rotating disc 56 to rotate, when the rotating disc 56 rotates, three groups of clamping rods 58 can be enabled to move through three groups of inclined arc grooves 57, the clamping rods 58 slide on the positioning disc 55 to the inner wall of the moving ring 26 to perform positioning locking, the moving ring 26 can be enabled to be in contact with and fit with the chuck 25, the moving ring 26 can be driven to rotate and be in fit with the stationary ring 28 when the chuck 25 rotates, the sealing effect of the moving ring 26 and the stationary ring 28 can be effectively enhanced through the arrangement of the clamping rods 58, and in the continuous rotation of the driving shaft 21, the spiral rod 42 can continuously provide pressure of the limiting frame 45, the limiting frame 45 can be enabled to be in contact with the outer wall of the second connecting plate 23 and the moving ring 26 and the stationary ring 28 can be prevented from loosening when the clamping rod 28 is continuously rotated;
S5: when the centrifugal pump stops working, when the driving shaft 21 does not rotate any more, the spring piece 37 resets, the spring piece 37 can drive the ratchet plate 34 to rotate in the resetting process, the ratchet plate 34 can not drive the pawl 32 to rotate the driving shaft 21 when rotating, the rotating gear 39 can rotate the two groups of rotating gears 43 reversely along with the rotation of the ratchet plate 34, when the rotating gears 43 reversely rotate, the limiting block 46 can reset the limiting block 46 under the driving of the abutting springs 48, the limiting block 46 resets and is clamped with the clamping grooves 36 on the threaded sleeve 44, the threaded sleeve 44 is driven to reset to the first connecting plate 22, the abutting frame 52 is reset under the driving of the elastic springs 53, the adjusting gear 51 can be rotated by moving the rack 54, the clamping rod 58 can not lock the moving ring 26 any more, after the moving ring 26 is locked, the moving ring 26 is pushed to be supplemented by the arranged pressure springs 27, and the supplementing operation of the moving ring 26 after the pump body in the operation process is realized, the moving ring 26 and the moving ring 28 can effectively contact with the miniature sand stone 26 and the moving ring 28 in the operation process, and the abrasion of the pump body can be effectively compensated after the moving ring 28.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above-described embodiments, and that the above-described embodiments and descriptions are only preferred embodiments of the present invention, and are not intended to limit the invention, and that various changes and modifications may be made therein without departing from the spirit and scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (3)
1. The utility model provides a chemical industry centrifugal pump's axle head mechanical seal device which characterized in that: the novel hydraulic pump comprises a shell (1) which is arranged, wherein the shell (1) is connected with a pump shell (11), an inner cavity is formed in the pump shell (11), a clamping cavity is formed in the shell (1) corresponding to the pump shell (11), one end of the pump shell (11) is connected with a driving part (2), the driving part (2) is in running fit with the pump shell (11), the driving part (2) comprises a driving shaft (21) which is rotatably arranged on the pump shell (11), a first connecting plate (22) and a second connecting plate (23) are fixedly connected in the inner cavity of the pump shell (11), the driving shaft (21) extends towards the first connecting plate (22) and the second connecting plate (23), and a driving disc (24) is fixedly connected on the driving shaft (21);
The driving disc (24) is provided with a chuck (25) in a clamping manner, the chuck (25) is provided with a movable ring (26), a pressure spring (27) is arranged between the chuck (25) and the second connecting plate (23), a stationary ring (28) which is arranged corresponding to the movable ring (26) is arranged in a clamping cavity of the shell (1), and the movable ring (26) and the stationary ring (28) are both sealing ring mechanisms;
The first connecting plate (22) is further provided with a transmission piece (3) in transmission fit with the driving shaft (21), the transmission piece (3) comprises an outer sleeve disc (31) fixedly arranged on the driving shaft (21), a pawl (32) is arranged on the outer sleeve disc (31) in a sliding mode, a pressure spring (33) is arranged between the pawl (32) and the outer sleeve disc (31), a ratchet disc (34) is rotatably arranged on the first connecting plate (22), and the pawl (32) is in contact with the ratchet disc (34);
The novel ratchet wheel comprises a first connecting plate (22), wherein an annular frame (35) is further arranged on the outer wall of the first connecting plate (22), a plurality of groups of clamping grooves (36) are distributed on the inner wall of the annular frame (35) around the circumference of the annular frame (35), a spring piece (37) is arranged in the annular frame (35), the spring piece (37) is connected with the outer wall of a ratchet wheel disc (34), a buckle (38) is arranged at one end of the spring piece (37) and is in contact with the clamping groove (36) on the annular frame (35), a rotary gear (39) is further fixedly arranged at the end of the ratchet wheel disc (34), the rotary gear (39) is in running fit with the first connecting plate (22), two groups of fixing rods (391) are connected between the first connecting plate (22) and the second connecting plate (23), and moving pieces (4) are oppositely arranged on two sides of the rotary gear (39) on the first connecting plate (22).
The two groups of moving parts (4) comprise positioning rods (41) which are fixedly arranged between a first connecting plate (22) and a second connecting plate (23) relatively, a screw rod (42) is rotatably arranged between the first connecting plate (22) and the second connecting plate (23), a rotating gear (43) meshed with the rotating gear (39) is arranged on one side of the screw rod (42), a threaded sleeve (44) in threaded fit with the screw rod (42) is further arranged on the screw rod (42), a limiting frame (45) is rotatably arranged on the threaded sleeve (44), and the limiting frame (45) is in sliding fit with the two groups of positioning rods (41);
A limiting block (46) is longitudinally arranged on the limiting frame (45) in a sliding manner, a limiting groove (47) which is clamped with the limiting block (46) is formed in the outer wall of the threaded sleeve (44), a collision spring (48) is arranged between the limiting block (46) and the limiting frame (45), a wedge plate (49) is also transversely arranged on the limiting frame (45) in a sliding manner, a V-shaped sliding groove (491) is formed in the wedge plate (49), and a clamping rod (492) which is matched with the V-shaped sliding groove (491) in the wedge plate (49) is arranged on the limiting block (46);
The two groups of fixing rods (391) extend to the circle center of the second connecting plate (23) and are provided with brackets (5), the two groups of brackets (5) are rotatably provided with adjusting gears (51), the end face of the second connecting plate (23) is provided with a relatively sliding supporting frame (52), an elastic spring (53) is arranged between the supporting frame (52) and the second connecting plate (23), the outer wall of the supporting frame (52) is in contact with a limiting block (46), and the two groups of supporting frames (52) are also provided with movable racks (54) meshed with the adjusting gears (51);
The novel rotary table is characterized in that a positioning disc (55) is fixedly arranged on the end face of the other side, opposite to the adjusting gear (51), of the second connecting plate (23), a rotary disc (56) is rotatably arranged on the positioning disc (55), the rotary disc (56) is connected with the adjusting gear (51), three groups of inclined arc grooves (57) are formed in the rotary disc (56) in a circumferential distribution mode around the rotary disc (56), clamping rods (58) are arranged in the three groups of inclined arc grooves (57), the three groups of clamping rods (58) are in sliding fit with the outer wall of the positioning disc (55), and the three groups of clamping rods (58) are in contact with the inner wall of the movable ring (26).
2. The shaft end mechanical sealing device of a chemical centrifugal pump according to claim 1, wherein: the side edges of the chuck (25) are obliquely arranged, and the chuck (25) is contacted with the abutting frame (52).
3. The application method of the shaft end mechanical sealing device of the chemical centrifugal pump comprises the following steps:
S1: when the centrifugal pump is used, the driving shaft (21) rotates to drive the driving disc (24) to rotate, the driving disc (24) rotates to enable the chuck (25) clamped on the driving disc (24) to rotate, the chuck (25) rotates to drive the movable ring (26) to rotate, and the movable ring (26) rotates to be in contact with the stationary ring (28) in the shell (1), so that a sealing effect in the operation process of the pump body is achieved;
S2: when the driving shaft (21) rotates, the driving shaft (21) rotates to drive the outer sleeve disc (31) to rotate, the pawl (32) which is rotatably arranged on the outer sleeve disc (31) contacts with the ratchet disc (34) to drive the ratchet disc (34) to synchronously rotate, the ratchet disc (34) rotates to drive the rotating gear (39) to rotate, the rotating gear (39) rotates to drive the two groups of moving parts (4) to synchronously move, and the two groups of moving parts (4) can be synchronously driven while the driving shaft (21) rotates, so that the movable ring (26) can be conveniently clamped by the two groups of moving parts (4);
S3: under the drive of the rotary gear (39), the rotary gear (39) can drive the rotary gear (43) to rotate, the rotary gear (43) rotates to drive the screw rod (42) to rotate, the screw sleeve is in clamping connection with the limiting groove (47) on the threaded sleeve (44) no longer when the screw rod (42) rotates, the limiting sleeve (45) moves towards the second connecting plate (23) from the first connecting plate (22), when the wedge plate (49) on the limiting frame (45) is in contact with the outer wall of the second connecting plate (23), the wedge plate (49) slides in the limiting frame (45) through the V-shaped sliding groove (491) arranged and is in contact with the clamping rod (492) on the limiting block (46), so that the limiting block (46) moves on the limiting frame (45), the limiting block (46) is not clamped with the limiting groove (47) on the threaded sleeve (44) any more, the limiting frame (45) can only drive the threaded sleeve (44) to rotate when the screw rod (42) rotates, and the screw rod (42) can be enabled to rotate, so that the threaded sleeve (44) can be enabled to continuously contact with the second connecting plate (23) to rotate, and the movement of the threaded sleeve (23) can be prevented from continuously contacting the second connecting plate (23);
s4: when the limiting block (46) moves on the limiting frame (45), the limiting block (46) is positioned at the side of the abutting frame (52), at the moment, the limiting block (46) moves out to the limiting frame (45) and contacts with the abutting frame (52), the limiting block (46) drives the abutting frame (52) to move, the abutting frame (52) drives the moving rack (54) to move, the moving rack (54) moves to drive the adjusting gear (51) to rotate, the adjusting gear (51) rotates to drive the rotating disc (56) to rotate, when the rotating disc (56) rotates, three groups of clamping rods (58) can be moved through the three groups of inclined arc grooves (57), the clamping rods (58) slide on the positioning disc (55) to the inner wall of the moving ring (26) to be positioned and locked, the moving ring (26) can be contacted with the chuck (25), the moving ring (26) can be driven to rotate and be abutted with the static ring (28) when the moving chuck (25), the moving ring (26) can be effectively abutted with the static ring (28), the rotating disc (28) can be abutted, the clamping rods (58) can be arranged to strengthen the rotating effect of the moving ring (26) and the rotating shaft (42) continuously and can continuously provide the synchronous pressure in the rotating process of the rotating shaft (42, the limiting frame (45) is continuously contacted with the outer wall of the second connecting plate (23), so that the loosening of the clamping rod (58) can be avoided when the movable ring (26) and the stationary ring (28) operate;
S5: when the centrifugal pump stops working, when the driving shaft (21) does not rotate any more, the spring piece (37) can reset, the spring piece (37) can drive the ratchet disc (34) to rotate in the resetting process, the ratchet disc (34) can not drive the pawl (32) to rotate the driving shaft (21) when rotating, the rotating gear (39) can rotate the two groups of rotating gears (43) to reversely rotate along with the rotation of the ratchet disc (34), when the rotating gears (43) reversely rotate, the limiting block (46) can reset under the driving of the abutting springs (48), the limiting block (46) resets, the clamping groove (36) on the threaded sleeve (44) is clamped with the limiting block (46) can drive the threaded sleeve (44) to reset to the first connecting plate (22), and meanwhile, the abutting frame (52) can reset under the driving of the elastic springs (53), the adjusting gear (51) can be rotated by moving the rack (54), the blocking rod (58) can not lock the movable ring (26), after the locking of the movable ring (26), the movable ring (26) can be pushed by the pressure springs (27) arranged after the locking of the movable ring (26) is contacted, the pump body can be operated in a replenishing operation through the replenishing operation, the movable ring (26) and the static ring (28) can be effectively contacted to avoid abrasion caused by micro fine sand contained in fluid entering the space between the movable ring (26) and the static ring (28), and the sealing ring can be effectively compensated after the pump body runs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410586752.4A CN118188568B (en) | 2024-05-13 | 2024-05-13 | Shaft end mechanical sealing device of chemical centrifugal pump and application method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410586752.4A CN118188568B (en) | 2024-05-13 | 2024-05-13 | Shaft end mechanical sealing device of chemical centrifugal pump and application method thereof |
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| CN118188568B true CN118188568B (en) | 2024-07-26 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104763674A (en) * | 2015-04-02 | 2015-07-08 | 北京华晟环能科技有限公司 | Impeller type pressure-adjustable mechanical sealing component |
| CN115492790A (en) * | 2022-09-15 | 2022-12-20 | 中广核核电运营有限公司 | Main pump shaft seal system dismounting method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005048780A (en) * | 2003-06-04 | 2005-02-24 | Nsk Ltd | Seal ring for water pump, rotary supporting device for water pump, and water pump |
| US7878509B2 (en) * | 2004-08-26 | 2011-02-01 | Eagle Industry Co., Ltd. | Mechanical seal device |
| KR20150069437A (en) * | 2013-12-13 | 2015-06-23 | 김현 | rotery wing oil press pump |
| WO2022155123A1 (en) * | 2021-01-12 | 2022-07-21 | Crane Pumps & Systems, Inc. | Pump with impeller for circulating cooling fluid |
| CN217926409U (en) * | 2022-09-07 | 2022-11-29 | 浙江甬尚科技有限公司 | Adjustable mechanical seal structure of pump body |
| CN117329160B (en) * | 2023-11-17 | 2024-03-22 | 丹东顺升机械设备有限公司 | Mechanical sealing device of high-temperature fluid delivery pump |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104763674A (en) * | 2015-04-02 | 2015-07-08 | 北京华晟环能科技有限公司 | Impeller type pressure-adjustable mechanical sealing component |
| CN115492790A (en) * | 2022-09-15 | 2022-12-20 | 中广核核电运营有限公司 | Main pump shaft seal system dismounting method |
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