CN109386462B - Rotor pump shaft sealing device - Google Patents
Rotor pump shaft sealing device Download PDFInfo
- Publication number
- CN109386462B CN109386462B CN201811510136.1A CN201811510136A CN109386462B CN 109386462 B CN109386462 B CN 109386462B CN 201811510136 A CN201811510136 A CN 201811510136A CN 109386462 B CN109386462 B CN 109386462B
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- Prior art keywords
- ring
- seat
- sealing
- shaft
- pump
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- 238000007789 sealing Methods 0.000 title claims abstract description 156
- 239000000463 material Substances 0.000 claims abstract description 55
- 230000003068 static effect Effects 0.000 claims abstract description 47
- 230000006835 compression Effects 0.000 claims abstract description 27
- 238000007906 compression Methods 0.000 claims abstract description 27
- 230000005540 biological transmission Effects 0.000 claims description 16
- 239000000110 cooling liquid Substances 0.000 claims description 15
- 238000007667 floating Methods 0.000 claims description 7
- 238000003825 pressing Methods 0.000 claims description 6
- 230000000284 resting effect Effects 0.000 claims 1
- 230000035939 shock Effects 0.000 abstract description 4
- 238000005336 cracking Methods 0.000 abstract description 3
- 210000003205 muscle Anatomy 0.000 abstract 1
- 239000012530 fluid Substances 0.000 description 13
- 238000001816 cooling Methods 0.000 description 10
- 239000003921 oil Substances 0.000 description 6
- 238000009825 accumulation Methods 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 3
- 230000003139 buffering effect Effects 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 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
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
- F04C15/0003—Sealing arrangements in rotary-piston machines or pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
- F04C15/0096—Heating; Cooling
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model provides a rotor pump shaft sealing device, including quick-witted seal seat (1), quiet ring seat (2), quiet ring (3), moving ring seat (5), moving ring (6), quiet ring (3) set up corresponding recess (9), moving ring seat (5) set up protruding muscle (8), moving ring (6) set up corresponding recess (9); the device comprises a movable ring seat (5), a movable ring (6), a static ring (3) and a static ring seat (2), wherein material sections in the inner cavity of the machine seal seat (1) are sequentially laminated and arranged along a shaft (4) from the inside of a pump to the outside of the pump, a ring-shaped cavity (10) allowing materials to enter is formed between the machine seal seat (1) and the movable ring (6) and between the machine seal seat (3), a compression spring (11) is arranged on the inner cavity seal section of the machine seal seat (1), the concave parts (9) of the movable ring (6) and the static ring (3) are formed only in part of the thickness of the movable ring (6) and the thickness of the rest part of the static ring (3) are kept in the original circular shape; the contact surfaces of the movable ring (6) and the stationary ring (3) are mutually clung; greatly improves the shock resistance of the movable ring and the static ring, and can effectively avoid the vibration cracking phenomenon of the friction pair.
Description
Technical Field
The invention relates to a rotor pump shaft sealing device.
Background
The rotor pump is also called as colloid pump, impeller pump, universal delivery pump, etc., because its impeller is like cam, also called as cam pump, the rotor pump belongs to the positive displacement pump; typically a dual rotor. The rotor pump achieves the purpose of conveying fluid materials by means of periodic conversion of a plurality of fixed-volume conveying units in the working cavity. A pair of synchronous gears are driven by a motor generally to drive a main shaft and a secondary shaft, and the double rotors are driven by the main shaft and the secondary shaft to synchronously rotate in opposite directions so as to change the volume of the pump, thereby forming higher vacuum degree and discharge pressure; the inlet is a low-pressure area, and the outlet is a high-pressure area. The rotor pump is mainly used for conveying sanitary materials and corrosive high-viscosity materials.
Because the material is required to bear higher pressure at the output end of the rotor pump during operation, the material is easy to leak from the rotating shafts. In order to avoid leakage of fluid materials, the shaft seal of the rotor pump is very important, and is one of the related technologies along with development of rotor pump technologies; improving the shaft sealing performance and the service life of the shaft sealing of the rotor pump is a long-sought goal of those skilled in the art. The shaft seal of the existing rotor pump mainly comprises a mechanical shaft seal and a packing type shaft seal, and the mechanical shaft seal is mainly used. The mechanical shaft seal of the rotor pump is a revolute pair which is formed by mutually clinging the end surfaces of a movable ring which moves along with the shaft and a static ring which is relatively static by utilizing a spring, and the peripheral gap is sealed by an O-shaped ring. Because the movable ring rubs with the static ring when the rotor pump works, the mechanical sealing parts comprising the movable ring, the static ring and the O-shaped ring are required to bear heating abrasion, so that the performance of the mechanical sealing parts is reduced, and the mechanical sealing parts are required to be shut down for maintenance until obvious leakage of fluid materials occurs. In the prior art, there is also a scheme of lubricating and cooling the mechanical seal by using the fluid materials conveyed by the mechanical seal, and the mechanical seal is fixed in the axial direction, for example, the chinese patent document CN201401323Y is an utility model disclosure document filed by the related company of the applicant of the present utility model, and because the fluid materials entering and exiting the space where the mechanical seal is located have higher pressure, there is a larger extrusion force on the mechanical seal, and once too much accumulation is not circulated, the temperature is continuously raised, so that the cooling effect of the fluid materials on the mechanical seal is reduced, and the shaft sealing performance of the rotor pump and the service life of the shaft sealing are affected.
In fact, the inventor finds that the pressure of fluid materials in and out of the space where the mechanical seal is located and in contact with the space is changed through many years of research, and finds that the mechanical seal is in a fixed design in the axial direction in the prior art, and the pressure change of the fluid materials does not take proper countermeasures, so that the impact of the pressure of the changed fluid materials has a great influence on the shaft sealing performance and the service life of the shaft seal; how to overcome the great influence of fluid material pressure impact on the shaft sealing performance and the service life of the shaft seal; in this regard, the inventor proposes a scheme that a floating pin is arranged between a movable ring seat and a rotor impeller on the basis of the arrangement of a compression spring on the movable ring seat in the prior art, so that a mechanical seal can float along the axial direction, and the tightness is synchronously increased along with the change of the pressure of fluid materials, so that the sealing when the pressure of the materials is increased can be ensured; when the material pressure is reduced, the mechanical seal is automatically reset, so that the mechanical seal can be reset; thus, dynamic balance can be achieved, and the great influence of fluid material pressure impact on the shaft sealing performance and the service life of the shaft seal can be effectively overcome; and the phenomenon that the shaft sealing performance of the rotor pump and the service life of the shaft seal are influenced due to continuous heating caused by excessive accumulation and non-circulation of materials can be effectively avoided. In this regard, the applicant's associated corporation filed a patent application CN201610917398.4 entitled "rotor pump shaft seal device" to 2016.10.21, which is now published under the publication number CN106286291a. In the publication scheme, the circumference of the inner wall of the stationary ring seat is provided with convex ribs, the circumference of the outer side wall of the stationary ring is provided with corresponding concave grooves, the circumference of the inner wall of the movable ring seat is provided with convex ribs, the circumference of the outer side wall of the movable ring is provided with corresponding concave grooves, and loose fit is formed between each convex rib and each concave groove; therefore, the positioning of the movable ring and the static ring and the transmission between the movable ring and the shaft are solved. For easy manufacture, the recesses of the movable ring and the stationary ring penetrate through the thickness of the wall where the recesses are located.
Although the scheme proposed in the 201610917398.4 patent application has a great technical progress compared with the traditional rotor pump shaft sealing device, the inventor finds that the moving ring and the stationary ring are generally made of materials such as silicon carbide, graphite, ceramics, silicon nitride, hard alloy and the like, the hardness is high, the wear resistance is good, but the moving ring and the stationary ring are friction pairs for long-term relative friction and vibration, a stress concentration area is formed during working, the moving ring and the stationary ring can be broken after a certain time of working, and the through depressions of the moving ring and the stationary ring greatly weaken the shock resistance of the moving ring and the stationary ring in the prior art including CN 106286291A; after working for a certain time, the friction pair is easy to generate vibration cracking phenomenon during working.
In addition, it is very important to maintain the elasticity of the compression spring of the rotor pump, and if the compression spring is lowered, the sealing performance of the shaft sealing device and the service life of the shaft seal are seriously affected. In the prior art, the compression springs of the shaft sealing device of the rotor pump are designed to be in contact with materials, such as the prior invention solutions of the inventor, which are filed by the applicant company. One is a CN201610917398.4 patent application filed by 2016.10.21, the invention is named as a 'rotor pump shaft sealing device', and the publication number is CN106286291A; secondly, the patent application of CN201610916537.1 is named as a shaft sealing device of a rotor pump, and the publication number of the device is CN106286290A; the material is easy to accumulate at the pressure spring of the inner cavity. Thirdly, CN201710368428.5 patent application filed by 2017.05.22 is named as a rotor pump and a shaft sealing device thereof, and publication number is CN107061266A; the annular opening replaces a plurality of through holes in the original scheme, so that the material can enter into an inner cavity where the compression spring is positioned more smoothly, and the accumulation phenomenon of the material at the compression spring in the inner cavity can be reduced; but the defects caused by the contact of the compression spring and the materials are not fundamentally eliminated, and the material accumulation phenomenon can occur at the spring, so that the elasticity of the compression spring is influenced, and the shaft sealing performance of the rotor pump and the service life of the shaft seal are further influenced.
The present invention aims to solve the above-mentioned problems. The present invention can be regarded as a further improvement of the scheme disclosed in the above chinese patent document.
Disclosure of Invention
The technical problem underlying the present invention is to provide a rotor pump, in particular a shaft sealing device thereof, which is aimed at the state of the art.
The technical scheme adopted for solving the technical problems is as follows:
The utility model provides a rotor pump shaft sealing device, including quick-witted seal seat (1), quiet ring seat (2), quiet ring (3), rotating ring seat (5) and by its driven rotating ring (6) of axle (4), all the cover is adorned outside axle (4), quick-witted seal seat (1) cover dress is outside and with pump body (7) fixed connection, quick-witted seal seat (1) inner chamber is including the material section that allows the material to get into and the sealed section that does not allow the material to get into, the internal diameter of material section is greater than the internal diameter of sealed section; at least 2 convex ribs (8) are arranged on the inner side of the pump of the stationary ring seat (2) along the circumference of the inner wall of the stationary ring seat, corresponding concave grooves (9) are arranged on the outer side wall circumference of the stationary ring (3), at least 2 convex ribs (8) are arranged on the outer side of the pump of the moving ring seat (5) along the circumference of the inner wall of the stationary ring seat, corresponding concave grooves (9) are arranged on the outer side wall circumference of the moving ring (6), and loose fit is formed between each convex rib (8) and each concave groove (9); the automatic sealing device is characterized in that the movable ring seat (5), the movable ring (6), the static ring (3) and the static ring seat (2) are sequentially attached to each other along the shaft (4) from the inside to the outside of the pump in the inner cavity of the mechanical sealing seat (1), an annular cavity (10) allowing materials to enter is formed between the mechanical sealing seat (1) and the movable ring (6) and between the mechanical sealing seat and the static ring (3), a compression spring (11) is arranged in the inner cavity sealing section of the mechanical sealing seat (1), the concave parts (9) of the movable ring (6) and the static ring (3) are formed only in part of the thickness of the concave parts, and the thicknesses of the movable ring (6) and the rest parts of the static ring (3) keep the original circular shape; the contact surface of the movable ring (6) is clung to the contact surface of the static ring (3).
The following are further solutions, respectively.
Set up first O shape circle (12) between quick-witted seal seat (1) and quiet ring seat (2), set up second O shape circle (13) between quick-witted seal seat (1) and the pump body (7), set up third O shape circle (14) between moving ring seat (5) and axle (4), set up fourth O shape circle (15) between moving ring seat (5) and moving ring (6), set up fifth O shape circle (16) between quiet ring (3) and quiet ring seat (2).
The movable ring seat (5) is provided with a step ring (17), and the movable ring (6) is placed outside the step ring (17).
Threaded holes (18) are formed in the sealing section of the machine sealing seat (1), at least 2 threaded holes (18) are uniformly distributed along the circumference of the cylinder body of the machine sealing seat (1), each threaded hole (18) is inserted into a stop bolt (19) in a sealing fit mode, and the front end of each stop bolt (19) is provided with a stop pin (20); a gap (21) is formed in the outer side of the pump of the static ring seat (2), and a stop pin (20) at the front end of a stop bolt (19) is inserted into the gap (21) of the static ring seat (2) in a loose fit mode; the movable ring seat (2) is connected with the impeller (23) through at least 2 transmission pins (22), one end of each transmission pin (22) is tightly matched with the impeller (23), and the inner side of the pump of the movable ring seat (5) is provided with a corresponding number of notches (21) for the transmission pins (22) to be inserted in a floating mode.
2 Pin holes (24) are symmetrically formed in the outer side of the pump on the impeller (23), one end of each of the 2 transmission pins (22) is respectively tightly inserted into the 2 pin holes (24) on the impeller (23), and 2 notches (21) are symmetrically formed in the inner side of the pump of the movable ring seat (5) for the transmission pins (22) to be inserted in a floating mode.
The sealing section of the inner cavity of the mechanical seal seat (1) is provided with a spring retainer ring (25), the cross section of the spring retainer ring (25) is in an angle square shape, the spring retainer ring is provided with a sleeve part (25A) and a retainer ring part (25B), the sleeve part (25A) of the spring retainer ring (25) is sleeved on the shaft (4), and the compression spring (11) is a single traditional large spring or a wave spring sleeved outside the sleeve part (25A) of the spring retainer ring (25); or the compression springs (11) are a plurality of small springs uniformly distributed along the outer circumference of the sleeve part (25A) of the spring retainer ring (25); the two ends of the compression spring (11) are respectively clamped between the static ring seat (2) and the retainer ring part (25B) of the spring retainer ring (25), and a spring washer (31) is further arranged between the static ring seat (2) and the retainer ring part (25B) of the spring retainer ring (25).
The periphery wall of the machine sealing seat (1) is provided with a cooling liquid inlet and outlet hole (26), and a cooling liquid circulation system is arranged outside the machine sealing seat (1); the sealing structure is characterized in that the shaft (4) is sleeved with the shaft sleeve (27) at the sealing section of the machine sealing seat (1), the shaft sleeve (27) is fixedly arranged on the outer surface of the shaft (4) through a stop screw, an oil seal ring (28) is arranged at the outer end of the machine sealing seat (1), the oil seal ring (28) is sleeved outside the shaft sleeve (27), a pressing plate (29) is arranged at the outer side of the sealing section of the machine sealing seat (1) to press the oil seal ring (28), the pressing plate (29) is fixedly arranged at the outer side of the sealing section of the machine sealing seat (1) through a bolt, and a sixth O-shaped ring (30) is arranged between the shaft sleeve (27) and the shaft (4).
The machine seal seat (1) is an integral body, a flange end (32) is arranged on the inner side of the pump of the machine seal seat (1), a plurality of connecting holes (33) are formed along the circumference of the flange end (32), and the machine seal seat is fixedly connected with the outer side of the pump body (7) through a plurality of bolts; the flange end (32) of the mechanical seal seat (1) is provided with a ring groove (34), and the second O-shaped ring (13) is embedded in the ring groove (34).
The method comprises the steps that a material section and a sealing section of a machine sealing seat (1) are arranged as a machine sealing front seat (1A) and a machine sealing rear seat (1B) in a split mode, the machine sealing seat (1) is a component formed by assembling the machine sealing front seat (1A) and the machine sealing rear seat (1B), a flange end (32) is arranged on the inner side of a pump of the machine sealing front seat (1A), a plurality of connecting holes (33) are formed along the circumference of the flange end (32), a flange mounting cavity is formed in an inner cavity of a pump body (7), the flange end (32) of the machine sealing front seat (1A) is embedded into the flange mounting cavity, and the machine sealing seat (1) is fixedly connected with the pump body (7) through a plurality of bolts from the inner cavity of the pump body (7); the second O-shaped ring (13) is arranged between the flange end (32) of the mechanical seal front seat (1A) and the pump body (7).
The outer side of the pump of the mechanical seal front seat (1A) is provided with a plurality of threaded holes (18) along the circumference of the wall thickness of the pump; the inner side of the pump of the machine sealing rear seat (1B) is also provided with a flange end (32), a plurality of connecting holes (33) are formed along the circumference of the flange end (32), and the machine sealing front seat (1A) is fixedly connected with the machine sealing rear seat (1B) through a plurality of bolts; a seventh O-shaped ring (35) is arranged between the front mechanical seal seat (1A) and the rear mechanical seal seat (1B).
According to the shaft sealing device, aiming at the through concave of the movable ring and the static ring, the shock resistance of the movable ring and the static ring can be greatly weakened, after a certain period of work, the vibration crack phenomenon of a friction pair is easy to occur during the work, and the concave (9) of the movable ring (6) and the static ring (3) is only formed in part of the thickness of the movable ring and the static ring, and the thicknesses of the movable ring (6) and the rest parts of the static ring (3) keep the original circular shape; greatly improves the shock resistance of the movable ring and the static ring, and can effectively avoid the vibration cracking phenomenon of the friction pair.
The compression spring of the shaft sealing device is positioned in the inner cavity sealing section of the mechanical seal seat and is not contacted with materials all the time, so that the defects caused by the contact of the compression spring and the materials are fundamentally eliminated, the phenomenon of material accumulation at the spring position is avoided, the compression spring can well keep the elasticity of the compression spring, and further the shaft sealing performance of the rotor pump and the service life of the shaft sealing can be well kept.
In addition, the fourth O-shaped ring (15) between the movable ring seat (5) and the movable ring (6) and the fifth O-shaped ring (16) between the stationary ring (3) and the stationary ring seat (2) of the shaft sealing device not only play a role in sealing, but also play a role in buffering and damping. According to the shaft sealing device, the movable ring seat (5) is provided with the step ring (17), and the movable ring (6) is placed outside the step ring (17), so that damage caused by mutual contact between the movable ring and the shaft can be effectively avoided. The shaft sealing device is provided with the spring retainer ring (25) so as to effectively prevent the two ends of the compression spring (11) from touching the shaft and possibly scratching the surface of the shaft.
The invention also provides an optimized scheme for setting the material section and the sealing section of the mechanical seal seat as the mechanical seal front seat and the mechanical seal rear seat separately, and the mechanical seal is installed from the inside of the pump body, so that an inlet and outlet pipeline of the pump is not required to be disassembled when the mechanical seal is replaced, and the maintenance work of a rotor pump user is facilitated.
Drawings
FIG. 1 is a schematic diagram of a cross-sectional structure of a single shaft seal device and a pump body and an impeller of a rotor pump with a cooling system according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of a dual-shaft seal and pump body with a cooling system rotor pump according to an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of a seal device for a single shaft with a cooling system rotor pump according to an embodiment of the present invention;
Fig. 4 and fig. 5 are schematic perspective views of a mechanical seal seat according to a first embodiment of the present invention, showing different orientations;
FIGS. 6 and 7 are schematic perspective views of the movable ring seat of the present invention, respectively showing different orientations;
FIGS. 8 and 9 are perspective views of the moving ring of the present invention, respectively showing different orientations;
FIGS. 10 and 11 are schematic perspective views of the stationary ring base of the present invention, respectively showing different orientations;
FIGS. 12 and 13 are schematic perspective views of a stationary ring according to the present invention, showing different orientations, respectively;
FIGS. 14 and 15 are schematic perspective views of a sleeve according to the present invention, showing different orientations;
FIG. 16 is a schematic front view of a two-bladed impeller adapted according to the present invention;
FIG. 17 is a schematic cross-sectional view of a two-bladed impeller adapted according to the present invention;
FIG. 18 is a schematic cross-sectional view of a seal device for a single shaft of a rotor pump without cooling system according to the second embodiment of the present invention;
FIG. 19 is a schematic cross-sectional view of a seal device for a split rotor pump with a cooling system seal base according to an embodiment of the present invention;
FIG. 20 is a schematic cross-sectional view of a seal assembly for a split rotor pump without a cooling system according to a fourth embodiment of the present invention;
FIG. 21 is a schematic diagram of a cross-sectional structure of a single shaft seal device and a pump body of a split rotor pump with a cooling system in accordance with an embodiment of the present invention;
fig. 22 is a schematic diagram of a cross-sectional structure of a dual-shaft seal device and a pump body of a split rotor pump with a cooling system machine seal seat according to an embodiment of the present invention.
Detailed Description
Specific embodiments of the present invention are described in detail below with reference to fig. 1 to 22. For convenience of description, the side of the shaft sealing device 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.
The shaft sealing device is mainly suitable for a rotor pump, and generally the rotor pump comprises a pump body 7, wherein 2 impellers 23 serving as interaction rotors are positioned in the pump body 7, and two parallel shafts 4 output by a synchronous box are fixedly connected with the corresponding impellers 23 respectively; impeller 23 is typically double-bladed or three-bladed, as well as single-bladed, four-bladed, five-bladed. The shaft sealing device is particularly suitable for a rotor pump for conveying various fluid materials.
Example 1
As shown in fig. 1 and 2, a shaft 1 of the rotor pump is fixedly connected with an impeller 2 serving as a rotor, 2 impellers (23) serving as interaction rotors are positioned in a pump body (7), and two parallel shafts (4) output through a synchronous box are respectively fixedly connected with the corresponding impellers (23). The shaft sealing device of the rotor pump comprises a machine sealing seat (1), a stationary ring seat (2), a stationary ring (3), a movable ring seat (5) rotating along with a shaft (4) and a movable ring (6) driven by the movable ring seat (5), which are sleeved outside the shaft (4), as shown in fig. 3. The machine seal seat is shown in fig. 4 and 5, the stationary ring seat is shown in fig. 10 and 11, the stationary ring is shown in fig. 12 and 13, the movable ring seat is shown in fig. 6 and 7, and the movable ring is shown in fig. 8 and 9. The mechanical seal seat (1) is sleeved outside and fixedly connected with the pump body (7), the inner cavity of the mechanical seal seat (1) comprises a material section allowing materials to enter and a sealing section not allowing the materials to enter, and the inner diameter of the material section is larger than that of the sealing section. At least 2 convex ribs (8) are arranged on the inner side of the pump of the stationary ring seat (2) along the circumference of the inner wall of the stationary ring seat, corresponding concave grooves (9) are arranged on the stationary ring (3) along the circumference of the outer side wall of the stationary ring seat, at least 2 convex ribs (8) are arranged on the outer side of the pump of the movable ring seat (5) along the circumference of the inner wall of the stationary ring seat, corresponding concave grooves (9) are arranged on the movable ring (6) along the circumference of the outer side wall of the stationary ring seat, and loose fit is formed between each convex rib (8) and each concave groove (9); the number of the convex ribs (8) and the concave grooves (9) is preferably 4. The device comprises a movable ring seat (5), a movable ring (6), a static ring (3) and a static ring seat (2), wherein material sections in the inner cavity of the machine seal seat (1) are sequentially laminated and arranged along a shaft (4) from the inside of a pump to the outside of the pump, a ring-shaped cavity (10) allowing materials to enter is formed between the machine seal seat (1) and the movable ring (6) and between the machine seal seat (3), a compression spring (11) is arranged on the inner cavity seal section of the machine seal seat (1), the concave parts (9) of the movable ring (6) and the static ring (3) are formed only in part of the thickness of the movable ring (6) and the thickness of the rest part of the static ring (3) are kept in the original circular shape; the contact surface of the movable ring (6) is mutually clung to the contact surface of the static ring (3).
As shown in fig. 3, a first O-ring (12) is arranged at the gap between the machine seal seat (1) and the stationary ring seat (2), a second O-ring (13) is arranged at the gap between the machine seal seat (1) and the pump body (7), a third O-ring (14) is arranged at the gap between the movable ring seat (5) and the shaft (4), a fourth O-ring (15) is arranged at the gap between the movable ring seat (5) and the movable ring (6), and a fifth O-ring (16) is arranged at the gap between the stationary ring (3) and the stationary ring seat (2). The inner cavity of the mechanical seal seat (1) is formed with a material section which allows the material to enter and a sealing section which does not allow the material to enter. The fourth O-shaped ring (15) between the movable ring seat (5) and the movable ring (6) and the fifth O-shaped ring (16) between the static ring (3) and the static ring seat (2) have the sealing function and the buffering and damping functions.
As shown in fig. 3, the movable ring seat (5) is provided with a step ring (17), and the movable ring (6) is placed outside the step ring (17). Thus, the movable ring (6) and the shaft (4) can not touch each other, and damage caused by mutual touch can be avoided.
As shown in fig. 3, threaded holes (18) are formed in the sealing section of the machine sealing seat (1), at least 2 threaded holes (18) are uniformly distributed along the circumference of the cylinder body of the machine sealing seat (1); generally, it is enough to symmetrically provide 2 cylinders along the cylinder of the seal holder 3, and of course, 3 or 4 cylinders may be uniformly provided along the circumference of the cylinder of the seal holder 3. The threaded holes (18) are inserted into the stop bolts (19) in a sealing fit manner, and the front ends of the stop bolts (19) are stop pins (20). To achieve a sealing fit, a sealing band or sealant can be screwed around the stop bolt (19). A gap (21) is formed at the outer side of the pump of the static ring seat (2), and a stop pin (20) at the front end of a stop bolt (19) is inserted into the gap (21) of the static ring seat (2) in a loose fit mode; the movable ring seat (2) is connected with the impeller (23) through at least 2 transmission pins (22), one end of each transmission pin (22) is tightly matched with the impeller (23), and the inner side of the pump of the movable ring seat (5) is provided with a corresponding number of notches (21) for the floating insertion of the transmission pins (22). In general, it is sufficient that 2 pin holes (24) are symmetrically formed on the outer side of the pump on the impeller (23), and as shown in fig. 16 and 17, one end of each of the 2 transmission pins (22) is tightly inserted into the 2 pin holes (24) on the impeller (23); as shown in fig. 6 and 7, 2 notches (21) are symmetrically formed on the inner side of the pump of the movable ring seat (5) for the floating insertion of the transmission pin (22).
As shown in fig. 3, a spring retainer ring (25) is arranged at the inner cavity sealing section of the machine seal seat (1), the cross section of the spring retainer ring (25) is in an angle square shape, as shown in fig. 14 and 15, the machine seal seat is provided with a sleeve part (25A) and a retainer ring part (25B), the sleeve part (25A) of the spring retainer ring (25) is sleeved on the shaft (4), and the compression spring (11) is a single traditional large spring or a wave spring sleeved outside the sleeve part (25A) of the spring retainer ring (25); or the compression springs (11) are a plurality of small springs uniformly distributed along the outer circumference of the sleeve part (25A) of the spring retainer ring (25); the two ends of the compression spring (11) are respectively clamped between the static ring seat (2) and the retainer ring part (25B) of the spring retainer ring (25), and a spring washer (31) is further arranged between the static ring seat (2) and the retainer ring part (25B) of the spring retainer ring (25). The spring retainer ring (25) can effectively prevent the two ends of the compression spring (11) from touching the shaft to possibly scratch the surface of the shaft.
As shown in fig. 3, a cooling liquid inlet and outlet hole (26) is formed in the circumferential wall of the machine seal seat (1), and a cooling liquid circulation system is arranged outside the machine seal seat (1); when in use, the cooling liquid circulates with the outside through the sealing section of the machine sealing seat (1) to cool the machine sealing. In order to prevent the leakage of the cooling liquid, a cooling liquid leakage preventing mechanism is arranged at the outer side of the pump of the mechanical seal seat (1). The coolant leakage prevention mechanism may be provided as follows: the shaft (4) is sleeved with the shaft sleeve (27) at the sealing section of the machine seal seat (1), the shaft sleeve (27) is fixedly arranged on the outer surface of the shaft (4) through a stop screw, an oil seal ring (28) is arranged at the outer end of the machine seal seat (1), the oil seal ring (28) is sleeved outside the shaft sleeve (27), a pressing plate (29) is arranged at the outer side of the sealing section of the machine seal seat (1) to press the oil seal ring (28), the pressing plate (29) is fixedly arranged at the outer side of the sealing section of the machine seal seat (1) through a bolt, and a sixth O-shaped ring (30) is arranged between the shaft sleeve (27) and the shaft (4).
As shown in fig. 3,4 and 5, the machine seal seat (1) is a whole, a flange end (32) is arranged at the inner side of the pump of the machine seal seat (1), a plurality of connecting holes (33) are formed along the circumference of the flange end (32), and the machine seal seat is fixedly connected with the outer side of the pump body (7) through a plurality of bolts; the flange end (32) of the machine seal seat (1) is provided with a ring groove (34), and a second O-shaped ring (13) is embedded in the ring groove (34).
When the rotor pump shaft sealing device is assembled, the related parts of the shaft sealing device can be directly and sequentially installed on the outer side of the pump body (7).
Example two
As shown in fig. 18, the second embodiment is different from the first embodiment in that: the outside of the machine sealing seat (1) is not provided with a cooling liquid circulation system. Therefore, the circumferential wall of the machine sealing seat (1) does not need to be provided with cooling liquid inlet and outlet holes (26) and a cooling liquid leakage prevention mechanism. The other aspects of the first embodiment are all followed. In the assembly of the shaft sealing device of the second rotor pump in this embodiment, the related components of the shaft sealing device can be directly and sequentially installed on the outer side of the pump body (7).
Example III
As shown in fig. 19, the third embodiment differs from the first embodiment in that: the method comprises the steps that a material section and a sealing section of a machine sealing seat (1) are arranged as a machine sealing front seat (1A) and a machine sealing rear seat (1B) in a split mode, the machine sealing seat (1) is a component formed by assembling the machine sealing front seat (1A) and the machine sealing rear seat (1B), a flange end (32) is arranged on the inner side of a pump of the machine sealing front seat (1A), a plurality of connecting holes (33) are formed along the circumference of the flange end (32), a flange mounting cavity is formed in an inner cavity of a pump body (7), the flange end (32) of the machine sealing front seat (1A) is embedded into the flange mounting cavity, and the machine sealing seat (1) is fixedly connected with the pump body (7) through a plurality of bolts from the inner cavity of the pump body (7); the second O-shaped ring (13) is arranged between the flange end (32) of the mechanical seal front seat (1A) and the pump body (7). The outer side of the pump of the mechanical seal front seat (1A) is provided with a plurality of threaded holes (18) along the circumference of the wall thickness; the inner side of the pump of the machine seal back seat (1B) is also provided with a flange end (32), a plurality of connecting holes (33) are formed along the circumference of the flange end (32), and the machine seal front seat (1A) is fixedly connected with the machine seal back seat (1B) through a plurality of bolts; a seventh O-shaped ring (35) is arranged between the front sealing seat (1A) and the rear sealing seat (1B). The other aspects of the first embodiment are all followed. The cross-sectional structure of the triple-axis seal device of this embodiment is shown in fig. 21, the cross-sectional structure of the triple-axis seal device of this embodiment and the pump body is shown in fig. 21, and the cross-sectional structure of the triple-axis seal device of this embodiment and the pump body is shown in fig. 22. When the shaft sealing device of the tri-rotor pump is assembled, the front seat (1A) of the machine seal is required to be installed from the inner side to the outer side of the pump body (7), and other components can be directly installed on the outer side of the pump body (7) in sequence. The mechanical seal of this embodiment can be installed from the pump body inside, just need not dismantle the import and export pipeline of pump when changing the mechanical seal, has brought the convenience for rotor pump user's maintenance.
Example IV
As shown in fig. 20, the third embodiment differs from the first embodiment in that: the outside of the machine sealing seat (1) is not provided with a cooling liquid circulation system. Therefore, the circumferential wall of the machine sealing seat (1) does not need to be provided with cooling liquid inlet and outlet holes (26) and a cooling liquid leakage prevention mechanism. The other versions of the third embodiment are all followed. When the shaft sealing device of the tri-rotor pump is assembled, the front seat (1A) of the machine seal is required to be installed from the inner side to the outer side of the pump body (7), and other components can be directly installed on the outer side of the pump body (7) in sequence. The mechanical seal of this embodiment can be installed from the pump body inside, just need not dismantle the import and export pipeline of pump when changing the mechanical seal, has brought the convenience for rotor pump user's maintenance.
Claims (10)
1. The utility model provides a rotor pump shaft sealing device, including quick-witted seal seat (1), quiet ring seat (2), quiet ring (3), rotating ring seat (5) and by its driven rotating ring (6) of axle (4), all the cover is adorned outside axle (4), quick-witted seal seat (1) cover dress is outside and with pump body (7) fixed connection, quick-witted seal seat (1) inner chamber is including the material section that allows the material to get into and the sealed section that does not allow the material to get into, the internal diameter of material section is greater than the internal diameter of sealed section; at least 2 convex ribs (8) are arranged on the inner side of the pump of the stationary ring seat (2) along the circumference of the inner wall of the stationary ring seat, corresponding concave grooves (9) are arranged on the outer side wall circumference of the stationary ring (3), at least 2 convex ribs (8) are arranged on the outer side of the pump of the moving ring seat (5) along the circumference of the inner wall of the stationary ring seat, corresponding concave grooves (9) are arranged on the outer side wall circumference of the moving ring (6), and loose fit is formed between each convex rib (8) and each concave groove (9); the automatic sealing device is characterized in that the movable ring seat (5), the movable ring (6), the static ring (3) and the static ring seat (2) are sequentially attached to each other along the shaft (4) from the inside to the outside of the pump in the inner cavity of the mechanical sealing seat (1), an annular cavity (10) allowing materials to enter is formed between the mechanical sealing seat (1) and the movable ring (6) and between the mechanical sealing seat and the static ring (3), a compression spring (11) is arranged in the inner cavity sealing section of the mechanical sealing seat (1), the concave parts (9) of the movable ring (6) and the static ring (3) are formed only in part of the thickness of the concave parts, and the thicknesses of the movable ring (6) and the rest parts of the static ring (3) keep the original circular shape; the contact surface of the movable ring (6) is clung to the contact surface of the static ring (3).
2. Shaft sealing device according to claim 1, characterized in that a first O-ring (12) is arranged between the machine seal seat (1) and the stationary ring seat (2), a second O-ring (13) is arranged between the machine seal seat (1) and the pump body (7), a third O-ring (14) is arranged between the movable ring seat (5) and the shaft (4), a fourth O-ring (15) is arranged between the movable ring seat (5) and the movable ring (6), and a fifth O-ring (16) is arranged between the stationary ring (3) and the stationary ring seat (2).
3. Shaft sealing device according to claim 2, characterized in that the moving ring seat (5) is provided with a step ring (17), the moving ring (6) resting outside the step ring (17).
4. The shaft sealing device according to claim 2, wherein the sealing section of the mechanical seal seat (1) is provided with at least 2 threaded holes (18), the threaded holes (18) are uniformly distributed along the circumference of the cylinder body of the mechanical seal seat (1), each threaded hole (18) is inserted into a stop bolt (19) in a sealing fit manner, and the front end of the stop bolt (19) is provided with a stop pin (20); a gap (21) is formed in the outer side of the pump of the static ring seat (2), and a stop pin (20) at the front end of a stop bolt (19) is inserted into the gap (21) of the static ring seat (2) in a loose fit mode; the movable ring seat (5) is connected with the impeller (23) through at least 2 transmission pins (22), one end of each transmission pin (22) is tightly matched with the impeller (23), and the inner side of the pump of the movable ring seat (5) is provided with a corresponding number of notches (21) for the transmission pins (22) to be inserted in a floating mode.
5. The shaft sealing device according to claim 4, wherein 2 pin holes (24) are symmetrically formed on the outer side of the pump on the impeller (23), one end of each of the 2 transmission pins (22) is respectively tightly inserted into the 2 pin holes (24) on the impeller (23), and 2 notches (21) are symmetrically formed on the inner side of the pump of the movable ring seat (5) for the transmission pins (22) to be inserted in a floating mode.
6. The shaft sealing device according to claim 1, wherein the inner cavity sealing section of the mechanical seal seat (1) is provided with a spring retainer ring (25), the cross section of the spring retainer ring (25) is in an angle square shape, the cross section of the spring retainer ring is provided with a sleeve part (25A) and a retainer ring part (25B), the sleeve part (25A) of the spring retainer ring (25) is sleeved on the shaft (4), and the compression spring (11) is a single traditional large spring or a wave spring sleeved outside the sleeve part (25A) of the spring retainer ring (25); or the compression springs (11) are a plurality of small springs uniformly distributed along the outer circumference of the sleeve part (25A) of the spring retainer ring (25); the two ends of the compression spring (11) are respectively clamped between the static ring seat (2) and the retainer ring part (25B) of the spring retainer ring (25), and a spring washer (31) is further arranged between the static ring seat (2) and the retainer ring part (25B) of the spring retainer ring (25).
7. The shaft sealing device according to claim 1, wherein the circumferential wall of the machine sealing seat (1) is provided with a cooling liquid inlet and outlet hole (26), and a cooling liquid circulation system is arranged outside the machine sealing seat (1); the sealing structure is characterized in that the shaft (4) is sleeved with the shaft sleeve (27) at the sealing section of the machine sealing seat (1), the shaft sleeve (27) is fixedly arranged on the outer surface of the shaft (4) through a stop screw, an oil seal ring (28) is arranged at the outer end of the machine sealing seat (1), the oil seal ring (28) is sleeved outside the shaft sleeve (27), a pressing plate (29) is arranged at the outer side of the sealing section of the machine sealing seat (1) to press the oil seal ring (28), the pressing plate (29) is fixedly arranged at the outer side of the sealing section of the machine sealing seat (1) through a bolt, and a sixth O-shaped ring (30) is arranged between the shaft sleeve (27) and the shaft (4).
8. The shaft sealing device according to claim 2, wherein the machine seal seat (1) is an integral body, a flange end (32) is arranged at the inner side of the pump of the machine seal seat (1), a plurality of connecting holes (33) are formed along the circumference of the flange end (32), and the machine seal seat is fixedly connected with the outer side of the pump body (7) through a plurality of bolts; the flange end (32) of the mechanical seal seat (1) is provided with a ring groove (34), and the second O-shaped ring (13) is embedded in the ring groove (34).
9. The shaft sealing device according to claim 2, characterized in that the material section and the sealing section of the machine sealing seat (1) are separately arranged into a machine sealing front seat (1A) and a machine sealing rear seat (1B), the machine sealing seat (1) is a component assembled by the machine sealing front seat (1A) and the machine sealing rear seat (1B), a flange end (32) is arranged at the inner side of a pump of the machine sealing front seat (1A), a plurality of connecting holes (33) are formed along the circumference of the flange end (32), a flange mounting cavity is formed in the inner cavity of the pump body (7), the flange end (32) of the machine sealing front seat (1A) is embedded into the flange mounting cavity, and the machine sealing seat (1) is fixedly connected with the pump body (7) from the inner cavity of the pump body (7) through a plurality of bolts; the second O-shaped ring (13) is arranged between the flange end (32) of the mechanical seal front seat (1A) and the pump body (7).
10. The shaft sealing device according to claim 9, characterized in that the pump outer side of the machine seal front seat (1A) is provided with a plurality of threaded holes (18) along the circumference of the wall thickness; the inner side of the pump of the machine sealing rear seat (1B) is also provided with a flange end (32), a plurality of connecting holes (33) are formed along the circumference of the flange end (32), and the machine sealing front seat (1A) is fixedly connected with the machine sealing rear seat (1B) through a plurality of bolts; a seventh O-shaped ring (35) is arranged between the front mechanical seal seat (1A) and the rear mechanical seal seat (1B).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811510136.1A CN109386462B (en) | 2018-12-11 | 2018-12-11 | Rotor pump shaft sealing device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811510136.1A CN109386462B (en) | 2018-12-11 | 2018-12-11 | Rotor pump shaft sealing device |
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| CN109386462B true CN109386462B (en) | 2024-06-18 |
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| CN205805997U (en) * | 2016-05-26 | 2016-12-14 | 大唐国际发电股份有限公司张家口发电厂 | Pumps for hot water supply net is without flushing water mechanically-sealing apparatus |
| CN107061266A (en) * | 2017-05-22 | 2017-08-18 | 宁波邦威泵业有限公司 | Impeller pump and its shaft sealer |
| CN108843615A (en) * | 2018-07-23 | 2018-11-20 | 余姚市华泰邦威泵业有限公司 | rotor pump shaft sealing device |
| CN209469577U (en) * | 2018-12-11 | 2019-10-08 | 余姚市华泰邦威泵业有限公司 | Rotor pump shaft sealing device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0629561Y2 (en) * | 1990-02-07 | 1994-08-10 | イーグル工業株式会社 | Double mechanical seal |
| CN204805542U (en) * | 2015-06-17 | 2015-11-25 | 宁波东联密封件有限公司 | Mechanical tighness system |
| CN205064850U (en) * | 2015-10-17 | 2016-03-02 | 江苏创进泵阀制造有限公司 | Mechanical sealing device for pump |
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2018
- 2018-12-11 CN CN201811510136.1A patent/CN109386462B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205805997U (en) * | 2016-05-26 | 2016-12-14 | 大唐国际发电股份有限公司张家口发电厂 | Pumps for hot water supply net is without flushing water mechanically-sealing apparatus |
| CN107061266A (en) * | 2017-05-22 | 2017-08-18 | 宁波邦威泵业有限公司 | Impeller pump and its shaft sealer |
| CN108843615A (en) * | 2018-07-23 | 2018-11-20 | 余姚市华泰邦威泵业有限公司 | rotor pump shaft sealing device |
| CN209469577U (en) * | 2018-12-11 | 2019-10-08 | 余姚市华泰邦威泵业有限公司 | Rotor pump shaft sealing device |
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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 |
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