CN114810611B - Improve mechanical seal operational environment's immersible pump - Google Patents
Improve mechanical seal operational environment's immersible pump Download PDFInfo
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- CN114810611B CN114810611B CN202210348212.3A CN202210348212A CN114810611B CN 114810611 B CN114810611 B CN 114810611B CN 202210348212 A CN202210348212 A CN 202210348212A CN 114810611 B CN114810611 B CN 114810611B
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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
- F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
- F04D7/04—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous
- F04D7/045—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous with means for comminuting, mixing stirring or otherwise treating
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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
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
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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
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2261—Rotors specially for centrifugal pumps with special measures
- F04D29/2288—Rotors specially for centrifugal pumps with special measures for comminuting, mixing or separating
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention provides a submersible pump for improving the operating environment of a mechanical seal, which comprises a submersible electric pump, a volute, a bottom cover, an impeller, a mechanical seal seat and a mechanical seal, wherein the submersible electric pump, the volute and the bottom cover are sequentially connected from top to bottom; the impeller is arranged at the end part of a rotor shaft of the submersible electric pump and is positioned in the volute; a first cavity is formed between the impeller and the mechanical seal seat, and the mechanical seal is arranged on the mechanical seal seat and is positioned in the first cavity; the end part of the impeller is in clearance fit with the end part of the mechanical sealing seat to form a first cutting pair, a sealing pair and a second cutting pair which are connected in sequence. The submersible pump capable of improving the operation environment of the mechanical seal can effectively prevent fibers and sand grains from entering the cavity where the mechanical seal is located, so that the fibers are prevented from being wound on the mechanical seal, and the long-term safe use of the mechanical seal is ensured.
Description
Technical Field
The invention belongs to the technical field of water pumps, and particularly relates to a submersible pump capable of improving the mechanical seal operation environment.
Background
The submersible sewage pump is widely applied to the transportation of domestic sewage and industrial wastewater, but the components of the domestic sewage and the industrial wastewater are complex, and the submersible sewage pump contains a large amount of sand grains and fibers, so that the submersible sewage pump can cause great influence on the safe operation of the submersible pump.
When the submersible pump is in operation, sand grains and fine fibers enter the cavity where the mechanical seal is located, the fibers are wound on the mechanical seal, and the sand grains and the fibers influence the sealing effect of the mechanical seal, so that liquid enters the motor cavity to damage a motor. Meanwhile, the heat dissipation performance of the mechanical seal is reduced, and the reliable use of the mechanical seal is influenced.
Disclosure of Invention
Aiming at the defects, the invention provides the submersible pump for improving the operating environment of the mechanical seal, which can effectively prevent sand grains and fibers from entering a cavity in which the mechanical seal is arranged, thereby avoiding the fibers from being wound on the mechanical seal, protecting the friction surface of the mechanical seal and ensuring the long-term safe use of the mechanical seal.
In order to solve the technical problem, the embodiment of the invention adopts the following technical scheme:
the embodiment of the invention provides a submersible pump capable of improving the operation environment of a mechanical seal, which comprises a submersible electric pump, a volute and a bottom cover, an impeller, a mechanical seal seat and a mechanical seal, wherein the submersible electric pump, the volute and the bottom cover are sequentially connected from top to bottom; the impeller is arranged at the end part of a rotor shaft of the submersible electric pump and is positioned in the volute; a first cavity is formed between the impeller and the mechanical seal seat, and the mechanical seal is arranged on the mechanical seal seat and is positioned in the first cavity; the end part of the impeller is in clearance fit with the end part of the mechanical sealing seat to form a first cutting pair, a sealing pair and a second cutting pair which are connected in sequence.
As a further improvement of the embodiment of the invention, the first cutting pair and the second cutting pair are horizontally arranged, and the sealing pair is vertically arranged.
As a further improvement of the embodiment of the invention, the second cutting pair, the sealing pair and the first cutting pair are sequentially arranged from inside to outside of the first cavity; and the first cutting pair is positioned below the second cutting pair.
As a further improvement of the embodiment of the present invention, the diameter of the fibers shearable by the second cutting pair is smaller than the diameter of the fibers shearable by the first cutting pair.
As a further improvement of the embodiment of the present invention, the impeller includes a hub shaft, a hub, an annular first sealing body and blades, the hub is coaxially disposed on the hub shaft, the first sealing body is disposed at the upper end of the hub, and the blades are disposed at the lower end of the hub; a first sealing position is formed between the outer ring of the first sealing body and the upper end of the hub; the mechanical seal seat comprises a body, an annular second seal body is arranged at the lower end of the body, and a second seal groove is formed between the inner ring of the second seal body and the lower end of the body; the first sealing body is positioned in the second sealing groove and in clearance fit, and the second sealing body is positioned in the first sealing position and in clearance fit.
As a further improvement of the embodiment of the invention, the upper end surface of the hub in the first sealing position is provided with a first cutting edge, the lower end surface of the second sealing body is provided with a third cutting edge, and the first cutting edge and the third cutting edge are in clearance fit to form the first cutting pair.
As a further improvement of the embodiment of the invention, a spiral is arranged on the outer circle surface of the first sealing body, and the inner circle surface of the second sealing body and the spiral form the sealing pair.
As a further improvement of the embodiment of the present invention, the flow direction of the water flow generated by the rotation of the spiral is from top to bottom.
As a further improvement of the embodiment of the present invention, a second blade is disposed on an upper end surface of the first sealing body, a fourth blade is disposed on a lower end surface of the body located in the second sealing groove, and the second blade and the fourth blade are in clearance fit to form the second cutting pair.
As a further improvement of the embodiment of the invention, a guide plate is arranged at the joint of the hub body and the hub and is positioned in the first cavity.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects: according to the submersible pump for improving the mechanical seal operation environment, the end part of the impeller is in clearance fit with the end part of the mechanical seal seat to form the first cutting pair, the sealing pair and the second cutting pair which are sequentially connected, so that fibers inside and outside the first cavity where the mechanical seal is located can be cut, sand grains and fibers are effectively prevented from entering the first cavity, the fibers are prevented from being wound on the mechanical seal, the mechanical seal friction surface is prevented from being abraded by the sand grains, the mechanical seal friction surface is protected, and the long-term safe use of the mechanical seal is ensured.
Drawings
Fig. 1 is a schematic structural diagram of a submersible pump for improving a mechanical seal operation environment according to an embodiment of the present invention;
FIG. 2 is a schematic view of the structure of an impeller in an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a mechanical seal seat in an embodiment of the present invention.
The figure shows that: the submersible electric pump comprises a submersible electric pump 1, a mechanical seal seat 2, a body 21, a second seal groove 22, a mounting hole 23, a fourth blade 24, a third blade 25, a second seal body 26, an impeller 3, a hub shaft 31, a first seal body 32, a hub 33, a blade 34, a first blade 35, a spiral 36, a second blade 37, a guide plate 38, a volute 4, a bottom cover 5, a first cutting pair 6, a seal pair 7, a second cutting pair 8 and a mechanical seal 9.
Detailed Description
The technical solution of the present invention will be described in detail below with reference to the accompanying drawings.
The following description is merely exemplary in nature and is not intended to limit the present disclosure, application, or uses. It should be understood that throughout the drawings, corresponding reference numerals indicate like or corresponding parts and features.
It should be noted that, for convenience of description, the term "lower end" is hereinafter used to refer to the installation orientation of the impeller relative to the motor in fig. 1 to 2; the "upper end" is the installation orientation of the motor relative to the impeller in fig. 1-2.
The embodiment of the invention provides a submersible pump for improving the operating environment of a mechanical seal, which comprises a submersible electric pump 1, a volute 4, a bottom cover 5, an impeller 3, a mechanical seal seat 2 and a mechanical seal 9, and is shown in figure 1. The upper end of the volute 4 is connected with the lower end of the submersible electric pump 1, and the upper end of the bottom cover 5 is connected with the bottom of the volute 4. The mechanical seal seat 2 penetrates through a rotor shaft of the submersible electric pump 1 and is arranged at the end part of the submersible electric pump 1, and the impeller 3 is arranged at the end part of the rotor shaft of the submersible electric pump 1 and is positioned in the volute 4. A first cavity is formed between the impeller 3 and the mechanical seal seat 2, and the mechanical seal 9 is arranged on the mechanical seal seat 2 and is positioned in the first cavity. The end part of the impeller 3 is in clearance fit with the end part of the mechanical seal seat 2 to form a first cutting pair 6, a seal pair 7 and a second cutting pair 8 which are connected in sequence.
According to the submersible pump in the embodiment, the end part of the impeller 3 is in clearance fit with the end part of the mechanical seal seat 2 to form the first cutting pair 6, the sealing pair 7 and the second cutting pair 8 which are connected in sequence, the sealing pair 7 is used for preventing sand grains and fibers outside the first cavity from entering the first cavity where the mechanical seal 9 is located, the first cutting pair 6 and the second cutting pair 8 are used for cutting fibers inside and outside the first cavity, the first cutting pair 6, the sealing pair 7 and the second cutting pair 8 form a labyrinth seal, triple protection is formed, not only can sand grains and fibers be effectively prevented from entering the first cavity where the mechanical seal is located, and the fibers are prevented from being wound on the mechanical seal, so that the friction surface of the mechanical seal is prevented from being abraded by the sand grains, but also the fibers inside and outside the first cavity can be cut, even if the cut fine fibers enter the first cavity, the fine fibers cannot be wound on the mechanical seal, and long-term safe use of the mechanical seal is ensured.
As a preferred example, the first cutting pair 6 and the second cutting pair 8 are horizontally arranged, and the sealing pair 7 is vertically arranged. The first cutting pair 6 that the level set up, the sealed pair 7 of vertical setting and the vice 8 labyrinth seals that form the zigzag of second cutting of horizontal setting, the labyrinth seal of zigzag has two perpendicular flex points, sand grain and fibre outside the first cavity need change twice direction in labyrinth seal and just can get into in the first cavity, the degree of difficulty in sand grain and fibre get into the first cavity has been increased, can effectively prevent sand grain and fibre to get into in the first cavity, prevent that the fibre winding is on mechanical seal, prevent sand grain wearing and tearing mechanical seal friction surface, guarantee mechanical seal's long-term safe handling. Even if a few sand grains and fibers enter the front section of the labyrinth seal, the first cutting pair 6 cuts the sand grains and the fibers to form finer sand grains and fibers; finer sand grains and fibers hardly enter the sealing pair 7 from the horizontal direction to the vertical direction, and meanwhile, the sealing pair 7 prevents the finer sand grains and fibers from continuously moving into the first cavity again; even if a few finer sand grains and fibers pass through the sealing pair 7 and hardly change from the vertical direction to the horizontal direction to enter the second cutting pair 8, the second cutting pair 8 can cut the finer sand grains and fibers to form the finer sand grains and fibers.
According to the preferred embodiment, the cutting action of the first cutting pair 6, the sealing action of the sealing pair 7 and the cutting action of the second cutting pair 8, and the Z-shaped arrangement formed by the first cutting web 6, the sealing pair 7 and the second cutting web 8 further improve the effect of preventing sand grains and fibers from entering the first cavity, further effectively prevent the fibers from being wound on the mechanical seal, prevent the sand grains from wearing the friction surface of the mechanical seal, and ensure the long-term safe use of the mechanical seal.
As a preferable example, as shown in fig. 2, the impeller 3 includes a hub shaft 31, a hub 33, an annular first sealing body 32, and blades 34. The hub shaft 31 is disposed at a center portion of the impeller, the hub shaft 31 is a cylinder including a shaft hole, and the impeller 3 is assembled at a lower end of the submersible electric pump 1 through the shaft hole. The hub 33 is disposed at a lower portion of the hub axle 31, the hub 33 is circular plate-shaped, and the hub 33 is disposed coaxially with the hub axle 31. An annular first sealing body 32 is provided perpendicularly to the upper end face of the boss 33, and the first sealing body 32 is coaxial with the boss 33. The blades 34 are arranged on the lower end face of the hub 33, and the blades 34 work on the water body to generate required flow and lift performance. The first sealing body 32 divides the upper part of the hub 33 into two parts, and one part is a first sealing position formed between the outer ring of the first sealing body 32 and the upper end of the hub 33 and is in clearance fit with the end part of the mechanical sealing seat 2. The other part is between the inner ring of the first sealing body 32, the upper end of the hub 33 and the outer ring of the hub shaft 31, and forms a first cavity together with the inner wall of the mechanical sealing seat 2.
As shown in fig. 3, the mechanical seal holder 2 comprises a body 21, a mounting hole 23 is provided at a middle position of an upper portion of the body 21, and the mechanical seal holder 2 is assembled at an end of the submersible motor 1 through the mounting hole 23 and is used for mounting the mechanical seal 9. The lower end of the body 21 is vertically provided with an annular second sealing body 26. A second seal groove 22 is formed between the inner ring of the second seal body 26 and the lower end of the body 21.
The first seal 32 is located in the second seal groove 22 and is clearance fit, and the second seal 26 is located in the first seal location and is clearance fit. That is, the upper end surface of the first seal body 32 is in clearance fit with the lower end surface of the main body 21 in the second seal groove 22, the outer circumferential surface of the first seal body 32 is in clearance fit with the inner circumferential surface of the second seal body 26, and the upper end surface of the boss 33 is in clearance fit with the lower end surface of the second seal body 26 in the first seal position, thereby forming a zigzag labyrinth seal.
Preferably, as shown in fig. 2, the upper end surface of the hub 33 in the first sealing position is provided with a first blade 35, the lower end surface of the second sealing body 26 is provided with a third blade 25, the rotating first blade 35 and the stationary third blade 25 are in clearance fit to form a horizontally arranged first cutting pair 6, and the first cutting pair 6 is used for cutting fine sand grains and fibers entering the front section of the labyrinth seal, so that the working environment of the mechanical seal is improved for the first time. The length of the first cutting edge 35 is adapted to the length of the third cutting edge 25 to ensure the cutting effect of the first cutting pair 6.
The first sealing body 32 is provided with a spiral 36 on the outer circumferential surface, and the second sealing body 26 and the spiral 36 form a sealing pair 7 which is vertically arranged. The rotation of the spiral 36 produces a water flow direction from top to bottom and a high velocity water flow from top to bottom, which stops the movement of the broken fibres or finer fibres and fine grit into the first chamber and discharges these fibres out of the labyrinth, improving the working environment of the mechanical seal a second time.
As shown in fig. 3, the upper end surface of the first sealing body 32 is provided with a second blade 37, the lower end surface of the body 21 in the second sealing groove 22 is provided with a fourth blade 24, and the rotating second blade 37 and the stationary fourth blade 24 are in clearance fit to form a second cutting pair 8 which is horizontally arranged. The second cutting pair 8 is used for cutting the broken or finer fibers entering the labyrinth seal rear section. The second cutting pair 8 has two functions: firstly, cutting the finer fibers entering the labyrinth seal rear section through the first cutting pair 6 and the seal pair 7, and improving the working environment of mechanical seal for the third time; and secondly, when the finer fibers in the first cavity move to the second cutting pair 8, the finer fibers are cut by the second cutting pair 8, so that the ultrafine fibers are prevented from being wound on the mechanical seal, the working environment of the mechanical seal is improved for the fourth time, and the mechanical seal is ensured to be safely and reliably used for a long time.
Thus, the formed first cutting pair 6 and second cutting pair 8 are arranged horizontally, and the sealing pair 7 is arranged vertically. And the second cutting pair 8, the sealing pair 7 and the first cutting pair 6 are sequentially distributed from the first cavity from inside to outside, and the first cutting pair 6 is positioned below the second cutting pair 8. In the moving direction from the outside of the first cavity to the inside of the first cavity, the first cutting pair 6 is positioned at the front section of the labyrinth seal, the sealing pair 7 is positioned at the middle section of the labyrinth seal, and the second cutting pair 8 is positioned at the rear end of the labyrinth seal. Sand grains and fibers need to sequentially pass through the first cutting pair 6, the sealing pair 7 and the second cutting pair 8 to move from outside to inside and from bottom to top if entering the first cavity. Finer sand and fibers formed after entering the first cutting pair 6 and being cut by the first cutting pair 6 are difficult to enter the sealing pair 7 under the blockage of water flow flowing from top to bottom generated by the spiral 36 rotating at high speed, even if a small amount of finer sand and fibers enter the sealing pair 7, because the sealing pair 7 is vertically arranged, an inlet of the sealing pair 7 is positioned at the lower end of the sealing pair 7, and an outlet of the sealing pair 7 is positioned at the upper end of the sealing pair 7, the finer sand and fibers entering the sealing pair 7 can only instantly enter the bottom of the sealing pair 7, are rapidly discharged out of the sealing pair 7 under the action of the spiral 36 rotating at high speed and then enter the first cutting pair 6, and then are discharged out of the first cutting pair 6 by high-pressure water flow. Therefore, finer grit and fibers cannot enter the first cavity through the sealing pair 7, thereby effectively protecting the operating environment of the mechanical seal.
Further, the diameter of the fibers that can be sheared by the second cutting pair 8 is smaller than the diameter of the fibers that can be sheared by the first cutting pair 6. The first cutting pair 6 at the outer end of the labyrinth seal cuts the fine fiber matter, and the first cutting pair 6 cuts the fine fiber matter into chopped fiber segments. Sealing pair 7 prevents the broken fiber pieces and finer fibers and fine sand particles in first cutting pair 6 from entering second cutting pair 8. By the interaction of the first cutting pair 6 and the sealing pair 7, it is very difficult for finer fibers and fine sand particles to enter the second cutting pair 8. Even if finer fibers such as hairs enter the second cutting pair 8, the fibers which can be cut by the second cutting pair 8 have smaller diameters, and the second cutting pair 8 cuts the finer fibers to cut the finer fibers into fragments, so that the cutting efficiency is further improved.
As a preferred example, a baffle 38 is disposed at the connection position of the hub body 31 and the hub 33, and the baffle 38 is located in the first cavity. The deflector 38 rotates creating a turbulent effect within the first chamber. On one hand, heat generated by mechanical sealing is taken away in time, and on the other hand, the finer chopped fibers in the first cavity continuously change positions and enter the second cutting pair 8 under the action of higher pressure in the first cavity when the chopped fibers move to the second cutting pair 8. Due to the fact that the length of the second cutting pair 8 is small, the chopped fibers move from top to bottom in the sealing pair 7 under the driving of the spiral of the sealing pair 7 and then move into the first cutting pair 6 to be discharged out of the first cavity under the action of fluid with certain pressure. The pressure of the fluid is the sum of the pressure generated by the deflector 38 and the pressure generated by the spiral 36.
The working process of the submersible pump for improving the mechanical seal operation environment of the embodiment of the invention is as follows:
the submersible pump is started, sewage enters the volute 4 through the lower part of the bottom cover 5, the impeller 3 rotating at a high speed applies work to liquid, and the liquid is discharged.
The impeller 3 rotating at high speed and the mechanical seal seat 2 in a static state form a Z-shaped labyrinth seal consisting of a first cutting pair 6, a seal pair 7 and a second cutting pair 8, the labyrinth seal has good sealing performance, large fibers and large sand grains outside the first cavity are prevented from entering the first cavity, fine sand grains and fibers entering the labyrinth seal are cut, and the fine sand grains and the fibers are prevented from entering the first cavity strongly.
The first blade 35 rotating at high speed and the third blade 25 in the static state form a first cutting pair 6 in the horizontal direction, the first cutting pair 6 is arranged at the front section of the labyrinth seal, and when the fine fibers enter the first cutting pair 6, the first cutting pair 6 cuts the fine fibers into chopped fibers. The sealing pair 7 in the middle section of the labyrinth seal is vertically arranged and is vertical to the first cutting pair 6 and the second cutting pair 8, and broken fiber, finer fiber and fine sand in the first cutting pair 6 need to change direction from a horizontal state, then move upwards from bottom to top, and then change direction to enter the second cutting pair 8, which is very difficult. Meanwhile, the spiral 36 in the sealing pair 7 rotates at high speed along with the impeller 3, and the generated water flow flows from top to bottom, so that the broken fibers, the finer fibers and the fine sand grains in the first cutting pair 6 are prevented from entering the sealing pair 7 and moving to the rear section of the labyrinth seal, and the finer fibers are prevented from entering the first cavity where the mechanical seal 9 is located. Even if a small amount of finer sand grains and fibers enter the sealing pair 7, since the sealing pair 7 is vertically arranged, the inlet is positioned at the lower end of the sealing pair 7, and the outlet is positioned at the upper end of the sealing pair 7, the finer sand grains and fibers entering the sealing pair 7 can only instantly enter the bottom of the sealing pair 7, are rapidly discharged out of the sealing pair 7 under the action of the spiral 36 rotating at high speed, enter the first cutting pair 6, and are then discharged out of the first cutting pair 6 by high-pressure water flow. If very small and very fine grits and fibres enter the labyrinth seal back section, the fourth blade 24 rotating at high speed and the second blade 37 in the stationary state form a second cutting pair 8, cutting the very fine fibres, grits and fine fragment fibres into smaller fragments, which even if they enter the first chamber do not get entangled around the mechanical seal and have no effect on the mechanical seal.
The guide plate 38 on the impeller 3 rotates at high speed along with the impeller to form turbulent flow in the first cavity. On one hand, the fluid takes away heat generated by the mechanical sealing pair in time, on the other hand, the positions of finer broken fibers in the cavity are continuously changed, and when the broken fibers move to the second cutting pair 8, the broken fibers enter the second cutting pair 8 under the action of higher pressure in the first cavity. Due to the fact that the length of the second cutting pair 8 is small, the chopped fibers move from top to bottom in the sealing pair 7 under the driving of the spiral of the sealing pair 7 and then move into the first cutting pair 6 to be discharged out of the first cavity under the action of fluid with certain pressure.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are intended to further illustrate the principles of the invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention, which is also intended to be covered by the appended claims. The scope of the invention is defined by the claims and their equivalents.
Claims (4)
1. The submersible pump capable of improving the mechanical seal operation environment is characterized by comprising a submersible electric pump (1), a volute (4) and a bottom cover (5) which are sequentially connected from top to bottom, and further comprising an impeller (3), a mechanical seal seat (2) and a mechanical seal (9), wherein the mechanical seal seat (2) penetrates through a rotor shaft of the submersible electric pump (1) and is arranged at the end part of the submersible electric pump (1); the impeller (3) is arranged at the end part of a rotor shaft of the submersible electric pump (1) and is positioned in the volute (4); a first cavity is formed between the impeller (3) and the mechanical seal seat (2), and the mechanical seal (9) is arranged on the mechanical seal seat (2) and is positioned in the first cavity; the end part of the impeller (3) is in clearance fit with the end part of the mechanical sealing seat (2) to form a first cutting pair (6), a sealing pair (7) and a second cutting pair (8) which are connected in sequence;
the impeller (3) comprises a hub shaft (31), a hub (33), an annular first sealing body (32) and blades (34), wherein the hub (33) is coaxially arranged on the hub shaft (31), the first sealing body (32) is arranged at the upper end of the hub (33), and the blades (34) are arranged at the lower end of the hub (33); a first sealing position is formed between the outer ring of the first sealing body (32) and the upper end of the hub (33); the mechanical seal seat (2) comprises a body (21), an annular second seal body (26) is arranged at the lower end of the body (21), and a second seal groove is formed between the inner ring of the second seal body (26) and the lower end of the body (21); the first sealing body (32) is positioned in the second sealing groove (22) and is in clearance fit, and the second sealing body (26) is positioned in the first sealing position and is in clearance fit;
the upper end face, located in the first sealing position, of the hub (33) is provided with a first cutting edge (35), the lower end face of the second sealing body (26) is provided with a third cutting edge (25), and the first cutting edge (35) and the third cutting edge (25) are in clearance fit to form the first cutting pair (6);
a spiral (36) is arranged on the outer circle surface of the first sealing body (32) in a circle, and the inner circle surface of the second sealing body (26) and the spiral (36) form the sealing pair (7); the flow direction of the water flow generated by the rotation of the spiral (36) is from top to bottom;
a second cutting edge (37) is arranged on the upper end face of the first sealing body (32), a fourth cutting edge (24) is arranged on the lower end face of the body (21) located in the second sealing groove, and the second cutting edge (37) and the fourth cutting edge (24) are in clearance fit to form the second cutting pair (8);
a guide plate (38) is arranged at the joint of the hub body (31) and the hub (33), and the guide plate (38) is located in the first cavity.
2. The submersible pump for improving the mechanical seal operation environment according to claim 1, characterized in that the first cutting pair (6) and the second cutting pair (8) are horizontally arranged, and the sealing pair (7) is vertically arranged.
3. The submersible pump for improving the mechanical seal operation environment according to claim 1 or 2, wherein the second cutting pair (8), the sealing pair (7) and the first cutting pair (6) are sequentially arranged from inside to outside of the first cavity; and the first cutting pair (6) is positioned below the second cutting pair (8).
4. The submersible pump for improving the operating environment of a mechanical seal according to claim 3, characterized in that the diameter of the fibers which can be sheared by the second cutting pair (8) is smaller than the diameter of the fibers which can be sheared by the first cutting pair (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210348212.3A CN114810611B (en) | 2022-04-01 | 2022-04-01 | Improve mechanical seal operational environment's immersible pump |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210348212.3A CN114810611B (en) | 2022-04-01 | 2022-04-01 | Improve mechanical seal operational environment's immersible pump |
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| CN114810611A CN114810611A (en) | 2022-07-29 |
| CN114810611B true CN114810611B (en) | 2022-12-20 |
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| CN202210348212.3A Active CN114810611B (en) | 2022-04-01 | 2022-04-01 | Improve mechanical seal operational environment's immersible pump |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101255869A (en) * | 2008-04-09 | 2008-09-03 | 南京蓝深制泵集团股份有限公司 | Method for sealing submersible pump |
| CN104100534A (en) * | 2014-07-07 | 2014-10-15 | 南京中德环保设备制造有限公司 | Submersible cutting sewage pump with efficient hydraulic performance |
| CN205779878U (en) * | 2016-07-04 | 2016-12-07 | 许小雷 | A kind of sealing structure in sewage cutting pump |
| CN107725472A (en) * | 2017-11-14 | 2018-02-23 | 利欧集团浙江泵业有限公司 | A kind of mechanical seal protection structure of water pump |
| CN209687735U (en) * | 2019-04-11 | 2019-11-26 | 浙江大元泵业股份有限公司 | A kind of antiwind anti-blockage structure of cutting pump |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104791284A (en) * | 2014-01-20 | 2015-07-22 | 江苏大学 | Cutting anti-blocking device for enclosed impeller ring of sewage pump |
| JP6601677B2 (en) * | 2016-02-16 | 2019-11-06 | 三菱日立パワーシステムズ株式会社 | Sealing device and rotating machine |
-
2022
- 2022-04-01 CN CN202210348212.3A patent/CN114810611B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101255869A (en) * | 2008-04-09 | 2008-09-03 | 南京蓝深制泵集团股份有限公司 | Method for sealing submersible pump |
| CN104100534A (en) * | 2014-07-07 | 2014-10-15 | 南京中德环保设备制造有限公司 | Submersible cutting sewage pump with efficient hydraulic performance |
| CN205779878U (en) * | 2016-07-04 | 2016-12-07 | 许小雷 | A kind of sealing structure in sewage cutting pump |
| CN107725472A (en) * | 2017-11-14 | 2018-02-23 | 利欧集团浙江泵业有限公司 | A kind of mechanical seal protection structure of water pump |
| CN209687735U (en) * | 2019-04-11 | 2019-11-26 | 浙江大元泵业股份有限公司 | A kind of antiwind anti-blockage structure of cutting pump |
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