A new pump group housing structure

Abstract

The utility model provides a novel pump group shell structure, including pump body shell, the pump body shell is rubbed and is welded with lower bearing seat, the upper bearing seat is provided with in the upper bearing seat, the lower bearing seat and the upper bearing seat are outside interference and are equipped with the base, the top of base is connected with the top cover thread. Friction welding is fused as one, fundamentally eliminates the use of screw, friction welding need not open threaded hole, eliminates the potential leak path of threaded hole, thereby improves the sealing performance. The screw hole is the typical stress concentration point, is easy to produce crack under the alternating load, cancels the screw hole, and the structure is more continuous, and the stress distribution is more reasonable, improves the pressure -resisting capacity and the service life.

Description

Technical Field

[0001] This utility model relates to the technical field of water pumps, and in particular to a novel pump set housing structure. Background Technology

[0002] The pump casing is an integrated protective and functional carrier that encloses the core working units of the pump (pump body and motor). It is mainly composed of the pump body casing, motor base, and motor top cover. As a key component that comes into direct contact with the external working environment (such as water, corrosive media, and silt), the pump casing is not only the main support for the structural strength of the equipment, but also the core barrier that protects the pump body and motor from external media intrusion, physical impact, and pressure damage. Its performance directly determines the pump's operational reliability, service life, and applicable application range.

[0003] A Chinese patent with authorization announcement number CN201013653Y discloses a cutting-type submersible sewage pump, including a motor, a pump body, and a cylinder. The motor includes a base and a top cover, with the top cover screwed onto the base. The pump body and motor are connected via the cylinder. The motor's base is screwed onto the upper end of the cylinder, and the lower end of the cylinder is screwed onto the pump body. In this cutting-type submersible sewage pump, the pump body, cylinder, base, and top cover are all connected by screws, and the screw connections rely on sealing gaskets to achieve gap sealing.

[0004] The existing technical solutions mentioned above have the following defects: 1. Long-term vibration will cause the screw preload to decrease, and the sealing gasket will gradually age and deform during use. Under the combined effect of these two factors, it is very easy to cause media leakage; 2. The opening of screw holes will directly reduce the overall strength of the pump set shell and form a stress concentration point. Under alternating load, cracks are prone to occur at this point, which will eventually lead to a decrease in the pressure resistance of the pump set shell and a shortened service life. Utility Model Content

[0005] The present invention aims to address the aforementioned shortcomings in the prior art by providing a novel pump housing structure that resolves the problems of easy media leakage and weakened pump housing strength and lifespan in the prior art.

[0006] The above-mentioned utility model objective is achieved through the following technical solution: a novel pump set housing structure, including a pump body housing, a lower bearing seat friction-welded on the pump body housing, an upper bearing seat disposed above the lower bearing seat, a machine base interference-fitted around the lower bearing seat and the upper bearing seat, and a top cover threadedly connected to the top of the machine base.

[0007] The present invention is further configured such that: the pump body shell includes a lower pump body and an upper pump body disposed above the lower pump body; the upper surface of the lower pump body is recessed to form a lower pump cavity; the bottom of the lower pump body has an inlet that communicates with the lower pump cavity; several support seats are provided on the outer side wall of the lower pump body; the upper surface of the lower pump body is convex to form a lower boss surrounding the outer periphery of the lower pump cavity; the lower surface of the upper pump body is recessed to form an upper pump cavity adapted to the lower pump cavity; the top of the upper pump body has an outlet that communicates with the upper pump cavity; the lower surface of the upper pump body is convex to form an upper boss surrounding the outer periphery of the upper pump cavity; and the upper pump body is fixedly connected to the lower pump body by friction welding of the upper boss and the lower boss.

[0008] The present invention is further configured such that: a lower connecting ring is formed protruding on the upper surface of the upper pump body and surrounding the outer periphery of the outlet; an outlet flange is provided at the outlet of the upper pump body; an upper connecting ring is formed by the lower surface of the outlet flange; and the outlet flange is fixedly connected to the upper pump body by friction welding of the upper connecting ring and the lower connecting ring.

[0009] The present invention is further configured such that: the lower bearing seat includes a connecting seat and a base disposed above the connecting seat; the lower surface of the connecting seat protrudes to form an upper connecting seat ring; the upper surface of the upper pump body protrudes to form a lower connecting seat ring; and the upper pump body is fixedly connected to the connecting seat by friction welding of the upper connecting seat ring and the lower connecting seat ring.

[0010] The present invention is further configured such that: a connecting groove is provided on the top surface of the connecting seat, and a plurality of reinforcing rings are provided circumferentially on the groove wall of the connecting groove; the bottom of the base is inserted into the connecting groove, and a plurality of reinforcing grooves that are engaged with the reinforcing rings are provided circumferentially on the bottom of the outer side wall of the base.

[0011] The present invention is further configured such that: a plurality of threaded holes are provided on the top surface of the base, and a plurality of locking screws are provided on the upper bearing seat, the bottom of which is threadedly connected to the threaded holes.

[0012] The present invention is further configured such that: a plurality of lower sealing grooves are provided in the upper circumferential direction of the outer side wall of the base, and a lower sealing ring is embedded in the lower sealing grooves and abuts against the inner wall of the base.

[0013] The present invention is further configured such that: an upper groove is provided circumferentially at the bottom of the outer wall of the upper bearing seat, a lower groove is provided circumferentially at the top of the outer wall of the base, and an inner cylinder is provided on the inner wall of the base. The top of the inner cylinder is embedded in the upper groove and the top surface of the inner cylinder abuts against the upper bearing seat, and the bottom of the inner cylinder is embedded in the lower groove and the bottom surface of the inner cylinder abuts against the lower bearing seat.

[0014] The present invention is further configured such that: the top of the inner wall of the base has an internal thread, and the lower part of the outer wall of the top cover has an external thread that engages with the internal thread of the base.

[0015] The present invention is further configured such that: a plurality of upper sealing grooves are provided in the upper circumferential direction of the outer side wall of the top cover, and an upper sealing ring is embedded in the upper sealing groove and abuts against the inner wall of the base.

[0016] In summary, the beneficial technical effects of this utility model are as follows: 1. Friction welding integrates two components into one, fundamentally eliminating the use of screws. Friction welding eliminates the need for threaded holes, thus eliminating potential leakage paths and improving sealing performance; 2. Uneven pressure distribution in screw connections can easily lead to uneven sealing stress. Friction welding creates a unified connection with uniform stress distribution, ensuring the integrity of the seal; 3. Compared to screw connections, which rely on the interlocking force of the threads, friction welding significantly improves the tensile strength, torsional strength, and fatigue strength of the connection; 4. Water pumps generate vibration during operation. Traditional screw connections are prone to loosening or falling off under long-term vibration, which is a common failure point. Friction welding forms a rigid, integrated structure, solving the problem of screw loosening and greatly improving the product's dynamic load resistance. 5. The pump with this new pump unit shell structure exhibits excellent vibration resistance and long-term reliability. Screw holes are typical stress concentration points, prone to cracking under alternating loads. Eliminating screw holes results in a more continuous structure, more reasonable stress distribution, and improved pressure resistance and service life. 6. The elimination of screws, washers, and some sealing rings (reducing the total number of required sealing rings) simplifies material management and assembly processes, reducing labor costs and the probability of errors. 7. Since no space is needed for screw heads and wrench operation, the pump body structure can be designed to be more compact and streamlined, helping to reduce volume and weight, lowering design complexity, and resulting in a seamless, aesthetically pleasing appearance. 8. It avoids potential electrochemical corrosion between screws and the metal shell, enhancing corrosion resistance. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the novel pump set housing in this utility model; Figure 2 This is a cross-sectional view of the outer shell structure of the novel pump unit in this utility model; Figure 3 This is a schematic diagram of the lower pump body of this utility model; Figure 4 This is a first-view structural schematic diagram of the upper pump body in this utility model; Figure 5 This is a structural schematic diagram of the upper pump body from a second perspective in this utility model; Figure 6 This is a structural schematic diagram of the lower bearing housing and the outlet flange in this utility model; Figure 7 This is a partial sectional view of the lower bearing housing in this utility model; Figure 8 This is a cross-sectional view of the lower bearing housing, upper bearing housing, base, and top cover of this utility model.

[0018] In the above attached figures: 1. Pump body shell; 2. Lower pump body; 21. Lower pump chamber; 22. Inlet; 23. Support seat; 24. Lower boss; 3. Upper pump body; 31. Upper pump chamber; 32. Outlet; 33. Upper boss; 34. Lower connecting ring; 35. Outlet flange; 36. Upper connecting ring; 37. Connector; 38. Lower connecting ring; 4. Lower bearing seat; 5. Connecting seat; 51. Connecting groove; 52. Reinforcing ring; 53. Upper connecting ring; 6. Base; 61. Reinforcing groove; 62. Threaded hole; 63. Lower sealing groove; 64. Lower sealing ring; 7. Upper bearing seat; 71. Locking screw; 8. Base; 81. Inner sleeve; 82. Upper groove; 83. Lower groove; 9. Top cover; 91. Upper sealing groove; 92. Upper sealing ring. Detailed Implementation

[0019] 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.

[0020] like Figure 1 and 2 As shown, this utility model proposes a novel pump set housing structure, including a pump body housing 1, a lower bearing seat 4, an upper bearing seat 7, a base 8, and a top cover 9.

[0021] like Figure 1 and 2 As shown, the pump housing 1 includes a lower pump body 2 and an upper pump body 3 disposed above the lower pump body 2.

[0022] like Figure 3 As shown, the upper surface of the lower pump body 2 is recessed to form a lower pump cavity 21. The bottom of the lower pump body 2 is provided with a water inlet 22 that communicates with the lower pump cavity 21. Several support seats 23 are provided on the outer side wall of the lower pump body 2. The upper surface of the lower pump body 2 is raised to form a lower boss 24 surrounding the lower pump cavity 21. The lower boss 24 and the lower pump body 2 are integrally formed by injection molding. The materials of the lower pump body 2 and the lower boss 24 are glass fiber reinforced ABS.

[0023] like Figure 3 and 4As shown, the lower surface of the upper pump body 3 is concave to form an upper pump cavity 31 that matches the lower pump cavity 21. The top of the upper pump body 3 has an outlet 32 ​​communicating with the upper pump cavity 31. The lower surface of the upper pump body 3 convexes to form an upper boss 33 surrounding the upper pump cavity 31. The upper boss 33 and the upper pump body 3 are integrally molded by injection molding. The materials of the upper pump body 3 and the upper boss 33 are glass fiber reinforced ABS. The width of the upper boss 33 is less than the width of the lower boss 24, and the distance between the outer wall of the upper boss 33 and the outer wall of the lower boss 24 is equal to the distance between the inner wall of the upper boss 33 and the inner wall of the lower boss 24. The upper pump body 3 is fixedly connected to the lower pump body 2 by friction welding of the upper boss 33 and the lower boss 24.

[0024] like Figure 5 and 6 As shown, a lower connecting ring 34 protrudes from the upper surface of the upper pump body 3, surrounding the outlet 32. The lower connecting ring 34 and the upper pump body 3 are integrally molded by injection molding. The material of the lower connecting ring 34 is glass fiber reinforced ABS. A hollow outlet flange 35 is provided at the outlet 32 ​​of the upper pump body 3. The outlet flange 35 communicates with the outlet 32. An upper connecting ring 36 protrudes from the lower surface of the outlet flange 35. The outlet flange 35 is fixedly connected to the upper pump body 3 by friction welding of the upper connecting ring 36 and the lower connecting ring 34. Figure 2 As shown, the inner wall of the outlet flange 35 has internal threads, and the outlet flange 35 is connected to the connector 37 through the internal threads.

[0025] like Figure 7 As shown, the lower bearing housing 4 includes a connecting seat 5 and a base 6 disposed above the connecting seat 5.

[0026] like Figure 6 and 7 As shown, the connecting seat 5 is injection molded below the base 6. A connecting groove 51 for the bottom of the base 6 to be inserted is formed on the top surface of the connecting seat 5. Two annular reinforcing rings 52 are integrally connected to the groove wall of the connecting groove 51. An upper connecting ring 53 protrudes from the lower surface of the connecting seat 5. The reinforcing rings 52, the upper connecting ring 53, and the connecting seat 5 are integrally formed by injection molding. The materials of the reinforcing rings 52, the upper connecting ring 53, and the connecting seat 5 are glass fiber reinforced ABS. A lower connecting ring 38 protrudes from the upper surface of the upper pump body 3. The lower connecting ring 38 is integrally formed with the upper pump body 3 by injection molding. The material of the lower connecting ring 38 is glass fiber reinforced ABS. The upper pump body 3 is fixedly connected to the connecting seat 5 of the lower bearing seat 4 by friction welding of the upper connecting ring 53 and the lower connecting ring 38.

[0027] like Figure 7As shown, the bottom of the base 6 is inserted into the connecting groove 51. Two annular reinforcing grooves 61 are opened circumferentially on the bottom of the outer wall of the base 6. The two reinforcing rings 52 of the connecting seat 5 are embedded in the two reinforcing grooves 61 of the base 6, which helps to improve the connection strength between the connecting seat 5 and the base 6.

[0028] like Figure 2 As shown, a number of threaded holes 62 are provided on the top surface of the base 6. The upper bearing seat 7 is located directly above the base 6 of the lower bearing seat 4. A number of locking screws 71 are provided on the upper bearing seat 7. The bottom of the locking screws 71 is threadedly connected to the threaded holes 62 of the base 6.

[0029] like Figure 2 and 8 As shown, the base 8 is interference-fitted onto the lower bearing seat 4 and the upper bearing seat 7. A cylindrical inner sleeve 81 is integrally fixed to the inner wall of the base 8. An upper groove 82 is circumferentially formed at the bottom of the outer wall of the upper bearing seat 7, and a lower groove 83 is circumferentially formed at the top of the outer wall of the base 6. The top of the inner sleeve 81 is embedded in the upper groove 82 and the top surface of the inner sleeve 81 abuts against the upper bearing seat 7. The bottom of the inner sleeve 81 is embedded in the lower groove 83 and the bottom surface of the inner sleeve 81 abuts against the lower bearing seat 4. At the same time, since the base 8 is interference-fitted with the lower bearing seat 4 and the upper bearing seat 7, relative axial slippage between the base 8 and the lower bearing seat 4 and the upper bearing seat 7 is not likely to occur.

[0030] like Figure 8 As shown, the top of the inner wall of the base 8 has an internal thread, and the lower part of the outer wall of the top cover 9 has an external thread that engages with the internal thread of the base 8. The top cover 9 is threadedly connected to the base 8, and the bottom surface of the top cover 9 abuts against the top surface of the upper bearing seat 7.

[0031] like Figure 8 As shown, two lower sealing grooves 63 are circumferentially formed on the upper part of the outer wall of the base 6. A lower sealing ring 64, abutting against the inner wall of the base 8, is embedded in each lower sealing groove 63. The function of the lower sealing ring 64 is to achieve a seal between the base 6 and the base 8. Two upper sealing grooves 91 are circumferentially formed on the upper part of the outer wall of the top cover 9. An upper sealing ring 92, abutting against the inner wall of the base 8, is embedded in each upper sealing groove 91. The function of the upper sealing ring 92 is to achieve a seal between the top cover 9 and the base 8.

[0032] The lower pump body 2 and upper pump body 3 of this novel pump set housing are connected by friction welding, and the upper pump body 3 and lower bearing seat 4 are connected by friction welding. This screwless connection method has the following advantages: 1. Friction welding integrates two components into one, fundamentally eliminating the use of screws. Friction welding does not require threaded holes 62, eliminating potential leakage paths of threaded holes 62, thereby improving sealing performance. 2. Uneven pressure distribution in screw connections can easily lead to uneven sealing stress. Friction welding, on the other hand, creates a seamless connection with uniform stress distribution, ensuring the integrity of the seal. 3. Compared with screw connections, which rely on the interlocking force of the threads, friction welding significantly improves the tensile strength, torsional strength, and fatigue strength of friction welded connections. 4. Water pumps generate vibrations during operation. Traditional screw connections are prone to loosening or falling off under long-term vibration, which is a common point of failure. Friction welding forms a rigid integrated structure, which solves the problem of screw loosening and greatly improves the long-term reliability of the product under dynamic loads. Water pumps using this new pump set shell structure have excellent anti-vibration performance. 5. Screw holes are typical stress concentration points, which are prone to cracking under alternating loads. Removing screw holes makes the structure more continuous, the stress distribution more reasonable, and improves the pressure resistance and service life. 6. It directly eliminates the need for standard and non-standard parts such as screws, washers, and some sealing rings (reducing the total number of sealing rings required), simplifying material management and assembly processes, and reducing labor costs and the probability of errors; 7. Since there is no need to leave space for screw heads and wrench operations, the pump body structure can be designed to be more compact and streamlined, which helps to reduce size and weight, reduce design complexity, and has no fasteners in appearance, resulting in a strong sense of unity and a beautiful appearance. 8. It avoids potential electrochemical corrosion between the screw and the metal casing, which helps to enhance corrosion resistance.

[0033] In summary, the new pump unit's outer casing structure represents not merely a change in connection method, but a complete reshaping of product reliability, sealing performance, and production efficiency. While it places higher demands on welding processes and equipment, the resulting superior waterproofing and extremely high structural reliability are crucial for ensuring the pump's long-term, trouble-free operation under harsh conditions.

[0034] 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 novel pump assembly housing structure, comprising a pump body housing (1), characterized in that: A lower bearing seat (4) is friction-welded onto the pump body housing (1), and an upper bearing seat (7) is provided above the lower bearing seat (4). A machine base (8) is interference-fitted onto the lower bearing seat (4) and the upper bearing seat (7), and a top cover (9) is threaded onto the top of the machine base (8).

2. The novel pump set housing structure according to claim 1, characterized in that: The pump housing (1) includes a lower pump body (2) and an upper pump body (3) disposed above the lower pump body (2). The upper surface of the lower pump body (2) is recessed to form a lower pump cavity (21). The bottom of the lower pump body (2) is provided with an inlet (22) communicating with the lower pump cavity (21). Several support seats (23) are provided on the outer side wall of the lower pump body (2). The upper surface of the lower pump body (2) is convex to form a lower boss (2) surrounding the lower pump cavity (21). 4) The lower surface of the upper pump body (3) is concave to form an upper pump cavity (31) that is adapted to the lower pump cavity (21). The top of the upper pump body (3) is provided with an outlet (32) that communicates with the upper pump cavity (31). The lower surface of the upper pump body (3) is convex to form an upper boss (33) surrounding the outer periphery of the upper pump cavity (31). The upper pump body (3) is fixedly connected to the lower pump body (2) by friction welding of the upper boss (33) and the lower boss (24).

3. The novel pump set housing structure according to claim 2, characterized in that: The upper surface of the upper pump body (3) protrudes to form a lower connecting ring (34) surrounding the outer periphery of the outlet (32). An outlet flange (35) is provided at the outlet (32) of the upper pump body (3). The lower surface of the outlet flange (35) protrudes to form an upper connecting ring (36). The outlet flange (35) is fixedly connected to the upper pump body (3) by friction welding of the upper connecting ring (36) and the lower connecting ring (34).

4. The novel pump set housing structure according to claim 2, characterized in that: The lower bearing seat (4) includes a connecting seat (5) and a base (6) disposed above the connecting seat (5). The lower surface of the connecting seat (5) protrudes to form an upper connecting seat ring (53), and the upper surface of the upper pump body (3) protrudes to form a lower connecting seat ring (38). The upper pump body (3) is fixedly connected to the connecting seat (5) by friction welding of the upper connecting seat ring (53) and the lower connecting seat ring (38).

5. The novel pump set housing structure according to claim 4, characterized in that: The top surface of the connecting seat (5) is provided with a connecting groove (51), and a plurality of reinforcing rings (52) are provided circumferentially on the groove wall of the connecting groove (51). The bottom of the base (6) is inserted into the connecting groove (51), and a plurality of reinforcing grooves (61) that are engaged with the reinforcing rings (52) are provided circumferentially on the bottom of the outer side wall of the base (6).

6. The novel pump set housing structure according to claim 4, characterized in that: The base (6) has several threaded holes (62) on its top surface, and the upper bearing seat (7) has several locking screws (71) whose bottoms are threaded to the threaded holes (62).

7. The novel pump set housing structure according to claim 4, characterized in that: The upper circumferential part of the outer wall of the base (6) is provided with several lower sealing grooves (63), and a lower sealing ring (64) is embedded in the lower sealing groove (63) and abuts against the inner wall of the base (8).

8. The novel pump set housing structure according to claim 4, characterized in that: The bottom of the outer wall of the upper bearing seat (7) is provided with an upper groove (82) and the top of the outer wall of the base (6) is provided with a lower groove (83). The inner wall of the base (8) is provided with an inner cylinder (81). The top of the inner cylinder (81) is embedded in the upper groove (82) and the top surface of the inner cylinder (81) abuts against the upper bearing seat (7). The bottom of the inner cylinder (81) is embedded in the lower groove (83) and the bottom surface of the inner cylinder (81) abuts against the lower bearing seat (4).

9. The novel pump set housing structure according to claim 1, characterized in that: The top of the inner wall of the base (8) has an internal thread, and the lower part of the outer wall of the top cover (9) has an external thread that engages with the internal thread of the base (8).

10. The novel pump set housing structure according to claim 9, characterized in that: The upper circumferential part of the outer side wall of the top cover (9) is provided with several upper sealing grooves (91), and an upper sealing ring (92) that abuts against the inner wall of the base (8) is embedded in the upper sealing grooves (91).

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