Single phase cyclone cutting pump

Abstract

The utility model provides a single -phase cyclone type cutting pump, including motor, pump body, cutting mechanism, motor includes base, upper bearing seat, top cover, and base has inner chamber, and upper bearing seat will the opening of top portion of inner chamber close, and the upper bearing seat is equipped with the axial sealing washer on the sleeve, and the axial sealing washer sets up at the union surface of upper bearing seat and base top, and the top cover sets up at the top of base, and the top cover is pressed tightly axial sealing washer and upper bearing seat simultaneously in the axial direction. The axial sealing washer in this single -phase cyclone type cutting pump can form the seal above the union surface of upper bearing seat and base, can also limit upper bearing seat rotation, is favorable to the installation structure of simplifying upper bearing seat.

Description

Technical Field

[0001] This utility model relates to the technical field of cutting pumps, and in particular to a single-phase vortex cutting pump. Background Technology

[0002] Single-phase vortex cutting pumps are a type of pump suitable for transporting complex liquids. They combine cutting function with vortex fluid dynamics design and are widely used in sewage treatment, agricultural irrigation, and household sewage disposal. They are particularly good at handling sewage or slurry containing fibers and solid particles (such as vegetable leaves, hair, and small stones), and can effectively prevent pipe blockage.

[0003] "Single-phase" here specifically refers to the pump using single-phase alternating current, corresponding to the most common household power supply. "Swirl-flow" describes the movement of the fluid inside the pump. Its working principle is as follows: The pump body has a specially shaped impeller (usually a vortex impeller) and flow channels. When the impeller rotates at high speed, it creates a rotating vortex field inside the pump chamber. The liquid is accelerated by the centrifugal force of the vortex and simultaneously transported from the suction end to the discharge end along the spiral flow channel.

[0004] A Chinese patent with authorization announcement number CN201013653Y discloses a cutting type submersible electric pump for sewage and waste, including a motor, a pump body, a sealing assembly, and a cutting device. The motor consists of a base, an end cover, a stator and a rotor installed in the base, and a motor shaft. An impeller connected to the motor shaft is installed in the pump body. The pump body and the motor are connected by a sealed cylinder filled with mechanical oil. The pump body has an inlet and an outlet. The cutting device consists of an impeller and a cutting disc installed at the inlet of the pump body.

[0005] The existing technical solution described above has the following drawbacks: the end cover of this cutting-type submersible sewage pump is only fixed to the base with screws, and this single connection method cannot completely eliminate the gaps at the joint surface. In actual operation, sewage and other liquids can easily seep into the interior of the base through these gaps, resulting in poor overall sealing of the equipment and obvious sealing defects. Utility Model Content

[0006] The problem this invention aims to solve is to provide a single-phase vortex cutting pump that addresses the aforementioned shortcomings in the prior art, thereby resolving the issue of poor sealing in the prior art.

[0007] The above-mentioned utility model objective is achieved through the following technical solution: a single-phase vortex cutting pump, including a motor, a pump body, and a cutting mechanism. The motor includes a base, an upper bearing seat, and a top cover. The base has an inner cavity. The upper bearing seat closes the opening at the top of the inner cavity. An axial sealing gasket is fitted on the upper bearing seat. The axial sealing gasket is positioned above the mating surface between the upper bearing seat and the base. The top cover is positioned on the top of the base. The top cover simultaneously axially presses against the axial sealing gasket and the upper bearing seat.

[0008] The present invention is further configured such that: a radial sealing groove is provided at the bottom of the outer side wall of the top cover, and a radial O-ring that fits into the base is embedded in the radial sealing groove.

[0009] The present invention is further configured such that: the pump body is disposed at the bottom of the base, the pump body has a pump cavity, an inlet and an outlet connected to both ends of the pump cavity, the pump shaft of the motor passes through the pump cavity of the pump body, and an impeller located in the pump cavity is coaxially disposed on the pump shaft.

[0010] The present invention is further configured such that the impeller is an open impeller.

[0011] The present invention is further configured such that: the cutting mechanism includes a cutter disc and a cutting blade; the cutter disc is disposed on the pump body and located below the inlet; a shaft hole is provided at the center of the cutter disc; a plurality of axial cutting through holes are evenly distributed circumferentially on the wall of the shaft hole; and the pump shaft passes through the shaft hole outward and is coaxially connected to the cutting blade.

[0012] The present invention is further configured such that: the cutting blade includes a blade holder and a planar cutting main blade, the blade holder is located in the middle of the cutting blade, and a plurality of planar cutting main blades are evenly distributed circumferentially on the outer side wall of the blade holder, and the planar cutting main blades cooperate with the edge of the opening of the axial cutting through hole to form a shearing pair.

[0013] The present invention is further configured such that: the hole wall of the shaft hole is evenly distributed with a plurality of inner plane cutting auxiliary grooves in the circumferential direction, the inner plane cutting auxiliary grooves and the axial cutting through hole are alternately arranged in the circumferential direction, and the main cutting blade of the plane and the groove edge of the inner plane cutting auxiliary groove cooperate to form a shearing pair.

[0014] The present invention is further configured such that: the cutter disc has a plurality of planar cutting through holes through the thickness direction, the plurality of planar cutting through holes are equidistantly distributed circumferentially on the outside of the shaft hole, and a plurality of planar fixed blades are fixedly connected to the hole wall of each planar cutting through hole, the planar cutting main blade and the planar fixed blades cooperate to form a shearing pair.

[0015] The present invention is further configured such that: a plurality of external plane cutting auxiliary grooves are equidistantly circumferentially formed on the outer disk surface of the cutter disc, the external plane cutting auxiliary grooves are formed along the thickness direction of the cutter disc, and the plane cutting main blade and the groove edge of the external plane cutting auxiliary groove cooperate to form a shearing pair.

[0016] The present invention is further configured such that: a secondary cutting edge seat is coaxially arranged on the end face of the tool holder facing the tool disc, and a plurality of axial cutting secondary edges are evenly distributed on the outer side wall of the secondary cutting edge seat in a circumferential direction, and the secondary cutting edge seat and the axial cutting secondary edges extend into the central hole of the tool disc.

[0017] In summary, the beneficial technical effects of this utility model are as follows:

[0018] (1) The axial sealing gasket in this single-phase vortex cutting pump can not only form a seal above the mating surface of the upper bearing housing and the machine base, but also restrict the rotation of the upper bearing housing, which is conducive to simplifying the installation structure of the upper bearing housing.

[0019] (2) This single-phase vortex cutting pump uses multiple shear pairs to perform shearing work, and has an axial cutting pair blade and a planar cutting opening for auxiliary cutting. This single-phase vortex cutting pump has the advantage of good cutting effect. Attached Figure Description

[0020] Figure 1 This is a cross-sectional view of the single-phase vortex cutting pump in this utility model.

[0021] Figure 2 This is a partial cross-sectional view of the motor in this utility model;

[0022] Figure 3 This is a partial cross-sectional view of the pump body in this utility model;

[0023] Figure 4 This is a cross-sectional view of the pump body in this utility model;

[0024] Figure 5 This is a schematic diagram of the cutter head structure in this utility model;

[0025] Figure 6 This is a first-view structural schematic diagram of the cutting blade in this utility model;

[0026] Figure 7 This is a structural schematic diagram of the cutting blade from a second perspective in this utility model.

[0027] In the above attached figures: 1. Motor; 2. Pump body; 3. Cutting mechanism; 4. Base; 5. Inner cavity; 6. Upper bearing seat; 7. Axial sealing gasket; 8. Top cover; 9. Radial sealing groove; 10. Radial O-ring; 11. Locking screw; 12. Pump cavity; 13. Inlet; 14. Outlet; 15. Pump shaft; 16. Impeller; 17. Cutter disc; 18. Mounting lug; 19. Mounting hole; 20. Shaft hole; 21. Axial cutting through hole; 22. Inner plane cutting auxiliary groove; 23. Planar cutting through hole; 24. Planar fixed blade; 25. Outer plane cutting auxiliary groove; 26. Cutting blade; 27. Blade holder; 28. Planar cutting main blade; 29. ​​Secondary blade holder; 30. Axial cutting secondary blade; 31. Planar cutting opening; 32. Countersunk hole; 33. Countersunk screw. Detailed Implementation

[0028] To make the technical means, creative features, objectives and effects of this utility model clearer and easier to understand, the present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0029] like Figure 1 As shown, this utility model proposes a single-phase vortex cutting pump, including a motor 1, a pump body 2, and a cutting mechanism 3.

[0030] like Figure 1 and 2 As shown, the motor 1 includes a base 4, an upper bearing housing 6, a top cover 8, and a pump shaft 15. The base 4 has an inner cavity 5, and the upper bearing housing 6 closes the opening at the top of the inner cavity 5. An axial sealing washer 7 is fitted on the upper bearing housing 6, and the axial sealing washer 7 is located above the mating surface of the upper bearing housing 6 and the base 4. The axial sealing washer 7 is made of rubber. The top cover 8 is screwed to the top of the base 4, and the bottom surface of the top cover 8 presses against the top surface of the axial sealing washer 7. The top cover 8 can simultaneously axially press the axial sealing washer 7 and the upper bearing housing 6.

[0031] The detailed working principle of this embodiment is as follows: the axial sealing gasket 7 is set above the mating surface of the upper bearing seat 6 and the base 4. The axial sealing gasket 7 can restrict sewage and other liquids from entering the inner cavity 5 of the base 4 through the mating surface of the upper bearing seat 6 and the base 4, which is beneficial to improving the sealing performance of this single-phase vortex cutting pump.

[0032] The detailed working principle of this embodiment is as follows: The axial sealing gasket 7 made of rubber has a high surface friction coefficient. When the top cover 8 axially presses the axial sealing gasket 7, the upper and lower contact surfaces of the axial sealing gasket 7 will generate huge positive pressure, which in turn forms a large friction force. When the upper bearing seat 6 and the axial sealing gasket 7 attempt to rotate relative to each other, the friction force between the contact surfaces of the axial sealing gasket 7 and the upper bearing seat 6 will form a resistance torque, which will counteract the rotation tendency.

[0033] The axial sealing gasket 7 in this single-phase vortex cutting pump can not only form a seal above the mating surface of the upper bearing housing 6 and the base 4, but also restrict the rotation of the upper bearing housing 6, which helps to simplify the installation structure of the upper bearing housing 6.

[0034] like Figure 2 As shown, a radial sealing groove 9 is provided at the bottom of the outer side wall of the top cover 8. A radial O-ring 10 is embedded in the radial sealing groove 9. The radial O-ring 10 fits against the base 4. The radial O-ring 10 forms a seal between the mating surfaces of the top cover 8 and the base 4, restricting sewage and other liquids from passing through the mating surfaces of the top cover 8 and the base 4.

[0035] This single-phase vortex cutting pump uses a radial O-ring 10, which, in conjunction with the axial sealing gasket 7, forms a double-layer sealing structure, which helps to improve the sealing performance of this single-phase vortex cutting pump.

[0036] like Figure 2 and 4 As shown, the pump body 2 is fixedly installed on the bottom of the base 4 by locking screws 11. The pump body 2 has a pump chamber 12, which adopts an annular flow channel. The pump body 2 has an inlet 13 and an outlet 14. The inlet 13 is located at the bottom of the pump body 2 and communicates with the pump chamber 12. The outlet 14 is located at the water outlet end of the pump chamber 12. The pump shaft 15 of the motor 1 passes through the pump chamber 12 of the pump body 2. An impeller 16 is coaxially connected to the pump shaft 15 by a key. The impeller 16 is an open impeller 16, which faces the inlet 13 of the pump body 2.

[0037] In this embodiment, when the pump body 2 is working, the motor 1 drives the impeller 16 to rotate through the pump shaft 15. Wastewater containing impurities passes sequentially through the inlet 13, pump chamber 12, and outlet 14. The pump chamber 12 adopts an annular flow channel design. Unlike the straight or constricting flow channels of traditional pumps, the annular flow channel can form a smoother, dead-angle-free liquid circulation path. When the impurity-containing liquid enters the pump body 2, the annular flow channel guides the liquid to flow smoothly in a circular direction, avoiding the problem of impurity accumulation caused by sudden changes in flow channel diameter or eddies at corners. This design significantly reduces the local resistance within the flow channel, allowing larger volumes of impurities (such as fibers, lumpy impurities, etc.) to pass smoothly with the liquid, fundamentally reducing the possibility of blockage in the pump body 2's flow channel.

[0038] like Figure 3 As shown, the cutting mechanism 3 is located below the inlet 13, and the cutting mechanism 3 includes a blade disc 17 and a cutting blade 26.

[0039] like Figure 5As shown, the outer circumference of the cutter head 17 is provided with several mounting ears 18 with mounting holes 19 at equal intervals. Screws are inserted through the mounting holes 19 to screw the cutter head 17 to the bottom surface of the pump body 2. The cutter head 17 is located below the inlet 13. The end face of the cutter head 17 facing the inlet 13 is the inner disc surface, and the end face of the cutter head 17 away from the inlet 13 is the outer disc surface. A shaft hole 20 is provided at the center of the cutter head 17. The shaft hole 20 is a circular hole for the pump shaft 15 to pass through.

[0040] like Figure 5 As shown, in this embodiment, the axial hole 20 has several axial cutting through holes 21 and several inner plane cutting auxiliary grooves 22 evenly distributed circumferentially on its hole wall. The axial cutting through holes 21 are opened along the thickness direction of the cutter head 17 and penetrate the cutter head 17. The inner plane cutting auxiliary grooves 22 are opened on the outer surface of the cutter head 17 and are opened along the thickness direction of the cutter head 17 but do not penetrate the cutter head 17. There are four axial cutting through holes 21 and four inner plane cutting auxiliary grooves 22. The axial cutting through holes 21 and the inner plane cutting auxiliary grooves 22 are arranged alternately circumferentially. Both the axial cutting through holes 21 and the inner plane cutting auxiliary grooves 22 are arc-shaped and radially distributed.

[0041] like Figure 5 As shown, the cutter head 17 has several planar cutting through holes 23 through the thickness direction. The several planar cutting through holes 23 are equidistantly distributed on the outside of the shaft hole 20. In this embodiment, two planar fixed cutting blades 24 are fixedly connected to the hole wall of each planar cutting through hole 23.

[0042] like Figure 5 As shown, a number of external plane cutting auxiliary grooves 25 are equidistantly circumferentially opened on the outer surface of the cutter head 17. The external plane cutting auxiliary grooves 25 are opened along the thickness direction of the cutter head 17. There are ten external plane cutting auxiliary grooves 25. The external plane cutting auxiliary grooves 25 are arc-shaped grooves. The ten external plane cutting auxiliary grooves 25 are radially distributed.

[0043] like Figure 3 As shown, the pump shaft 15 extends outward through the shaft hole 20 and is coaxially connected to the cutting blade 26. The cutting blade 26 is driven to rotate by the pump shaft 15. When the cutting blade 26 rotates, it can completely cover the axial cutting through hole 21, the inner plane cutting auxiliary groove 22, the plane cutting through hole 23, and the outer plane cutting auxiliary groove 25.

[0044] like Figure 6 and 7As shown, the cutting blade 26 is positioned below the cutter head 17. The cutting blade 26 includes a blade holder 27 and two planar cutting main blades 28. The blade holder 27 is located in the middle of the cutting blade 26. There are two planar cutting main blades 28, which are evenly distributed circumferentially on the outer wall of the blade holder 27. Among them, the edge of the axial cutting through hole 21, the edge of the inner planar cutting auxiliary groove 22, the planar fixed blade 24, and the edge of the outer planar cutting auxiliary groove 25 serve as fixed blades. The two planar cutting main blades 28, driven to rotate by the pump shaft 15, serve as movable blades. The planar cutting main blades 28 cooperate with the edge of the axial cutting through hole 21, the edge of the inner planar cutting auxiliary groove 22, the planar fixed blade 24, and the edge of the outer planar cutting auxiliary groove 25 to form a shearing pair.

[0045] A hollow secondary cutting edge seat 29 is coaxially disposed on the end face of the cutter head 17 facing the cutter head 17. In this embodiment, three axial cutting secondary edges 30 are evenly distributed circumferentially on the outer side wall of the secondary cutting edge seat 29. The cross-section of the axial cutting secondary edge 30 is fan-shaped. The secondary cutting edge seat 29 and the axial cutting secondary edges 30 extend into the shaft hole 20 of the cutter head 17. The axial cutting secondary edges 30 play an auxiliary shearing role.

[0046] The side wall of the cutter holder 27 has two planar cutting openings 31 circumferentially. The two planar cutting openings 31 are symmetrical to each other and are located in the shaft hole 20 of the cutter head 17. The groove edges of the two planar cutting openings 31 can serve as movable blades to assist in cutting through debris.

[0047] The cutter holder 27 is coaxially connected to the pump shaft 15. A countersunk hole 32 is provided on the bottom surface of the cutter holder 27. A countersunk screw 33 is provided in the countersunk hole 32. The countersunk screw 33 is connected to the pump shaft 15 by screws to coaxially press and fix the cutting blade 26 on the pump shaft 15.

[0048] The detailed working principle of this embodiment is as follows: Both the inner plane cutting auxiliary groove 22 and the outer plane cutting auxiliary groove 25 are radially distributed, which can guide fluid and impurities to gather in the gap between the cutting blade 26 and the cutter head 17. When the fluid flows under the negative pressure in the pump, the tilt angle or spiral direction of the inner plane cutting auxiliary groove 22 and the outer plane cutting auxiliary groove 25 will form a "channel effect", which will concentrate the dispersed impurities (such as fibers, plastics, small solid pieces) into the working range of the cutting blade 26, avoid the disorderly accumulation of impurities on the surface of the cutter head 17, and improve the cutting efficiency.

[0049] The detailed working principle of this embodiment is as follows: the planar cutting main blade 28 of this single-phase vortex cutting pump cooperates with the edge of the axial cutting through hole 21, the edge of the groove of the inner planar cutting auxiliary groove 22, the planar fixed blade 24 and the edge of the groove of the outer planar cutting auxiliary groove 25 to form a shearing pair, and the cutting blade 26 also has an axial cutting auxiliary blade 30 and a planar cutting opening 31 for auxiliary cutting.

[0050] The detailed working principle of this embodiment is as follows: the depth and volume of the inner plane cutting auxiliary groove 22 and the outer plane cutting auxiliary groove 25 can temporarily accommodate impurities that are not completely cut, preventing them from getting "stuck" between the cutting blade 26 and the cutter head 17. For example, when a large impurity enters, the inner plane cutting auxiliary groove 22 and the outer plane cutting auxiliary groove 25 can first "accommodate" part of its volume. By rotating the cutting blade 26, it is gradually pressed into the groove. The side walls of the inner plane cutting auxiliary groove 22 and the outer plane cutting auxiliary groove 25 restrict the displacement of the impurity. Then, the impurity is gradually shredded by the relative movement of the main cutting blade 28 and the groove edges of the inner plane cutting auxiliary groove 22 and the outer plane cutting auxiliary groove 25 (similar to "progressive cutting"), reducing the instantaneous impact force and protecting the service life of the cutter head 17 and the cutting blade 26.

[0051] This single-phase vortex cutting pump utilizes multiple shear pairs for shearing operations and features an axial cutting secondary blade 30 for auxiliary cutting and a planar cutting opening 31. This single-phase vortex cutting pump has the advantage of excellent cutting effect.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A single-phase vortex cutting pump, comprising a motor (1), a pump body (2), and a cutting mechanism (3), characterized in that: The motor (1) includes a base (4), an upper bearing seat (6), and a top cover (8). The base (4) has an inner cavity (5). The upper bearing seat (6) closes the opening at the top of the inner cavity (5). An axial sealing washer (7) is fitted on the upper bearing seat (6). The axial sealing washer (7) is located above the mating surface of the upper bearing seat (6) and the base (4). The top cover (8) is located on the top of the base (4). The top cover (8) simultaneously axially presses the axial sealing washer (7) and the upper bearing seat (6).

2. A single phase rotational flow cutting pump as claimed in claim 1, wherein: The bottom of the outer side wall of the top cover (8) is provided with a radial sealing groove (9), and a radial O-ring (10) that fits against the base (4) is embedded in the radial sealing groove (9).

3. A single phase rotational flow cutting pump as claimed in claim 1, wherein: The pump body (2) is located at the bottom of the base (4). The pump body (2) has a pump chamber (12), an inlet (13) and an outlet (14) connected to both ends of the pump chamber (12). The pump shaft (15) of the motor (1) passes through the pump chamber (12) of the pump body (2). An impeller (16) located in the pump chamber (12) is coaxially arranged on the pump shaft (15).

4. A single phase rotational flow cutting pump according to claim 3, wherein: The impeller (16) is an open impeller (16).

5. A single phase rotational flow cutting pump as claimed in claim 3, wherein: The cutting mechanism (3) includes a cutter disc (17) and a cutting blade (26). The cutter disc (17) is mounted on the pump body (2) and located below the inlet (13). A shaft hole (20) is provided at the center of the cutter disc (17). Several axial cutting through holes (21) are evenly distributed around the hole wall of the shaft hole (20). The pump shaft (15) passes through the shaft hole (20) and is coaxially connected to the cutting blade (26).

6. A single phase rotational flow cutting pump according to claim 5, wherein: The cutting blade (26) includes a blade holder (27) and a planar cutting main blade (28). The blade holder (27) is located in the middle of the cutting blade (26). Several planar cutting main blades (28) are evenly distributed on the outer side wall of the blade holder (27) in the circumferential direction. The planar cutting main blades (28) cooperate with the edge of the opening of the axial cutting through hole (21) to form a shearing pair.

7. A single phase rotational flow cutting pump according to claim 6, wherein: The shaft hole (20) has several inner plane cutting auxiliary grooves (22) evenly distributed circumferentially on the hole wall. The inner plane cutting auxiliary grooves (22) and the axial cutting through hole (21) are alternately arranged circumferentially. The plane cutting main blade (28) and the groove edge of the inner plane cutting auxiliary groove (22) cooperate to form a shearing pair.

8. A single phase rotational flow cutting pump as claimed in claim 6, wherein: The cutter head (17) has several planar cutting through holes (23) extending along the thickness direction. The planar cutting through holes (23) are equidistantly distributed on the outside of the shaft hole (20). Several planar fixed blades (24) are fixedly connected to the hole wall of each planar cutting through hole (23). The planar cutting main blade (28) and the planar fixed blades (24) cooperate to form a shearing pair.

9. A single-phase vortex cutting pump according to claim 6, characterized in that: The cutter head (17) has several external plane cutting auxiliary grooves (25) equidistantly circumferentially opened on the outer disk surface. The external plane cutting auxiliary grooves (25) are opened along the thickness direction of the cutter head (17). The plane cutting main blade (28) and the groove edge of the external plane cutting auxiliary groove (25) cooperate to form a shearing pair.

10. A single phase rotational flow cutting pump as claimed in claim 6, wherein: The tool holder (27) is coaxially provided with a secondary cutting edge (29) on the end face facing the cutter head (17). The outer side wall of the secondary cutting edge (29) is evenly distributed with several axial cutting secondary edges (30). The secondary cutting edge (29) and the axial cutting secondary edges (30) extend into the central hole of the cutter head (17).

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