Double-layer water pump shell capable of improving sealing performance

Abstract

The utility model provides a double-layer water pump shell capable of improving sealing performance. The double-layer water pump shell comprises an outer cylinder, an inner cylinder, a ring cover and a rotor. The outer cylinder and the inner cylinder are coaxially arranged, a gap is reserved between the outer cylinder and the inner cylinder, the stator is placed in the gap, the two ring covers are arranged in the gap between the two ends of the outer cylinder and the two ends of the inner cylinder in a sealed mode, the rotor is inserted into the inner cylinder, one end of the rotor is fixedly connected with the impeller, and the other end of the rotor is rotationally connected to the ring covers through thrust parts. According to the double-layer water pump shell with the improved sealing performance, through the double-layer shell structure design, the rigidity and the sealing performance of the shell are enhanced, and the leakage problem under the working condition of high pressure difference or high-speed rotation is effectively prevented; by arranging the screw plug and the groove, pouring liquid can be conveniently injected, and the sealing effect between the stator and the shell is enhanced; through the stable structure design of the thrust part, the operation stability of the rotor is improved; and through fixed connection of the end cover and the ring cover, the stability of the whole structure is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of water pumps, and particularly relates to a double-layer water pump shell with improved sealing performance. Background Art

[0002] With the acceleration of the processes of industrial automation and urbanization, the demand for fluid conveying equipment in various industries is increasing day by day. As the core equipment for fluid conveying, the performance of water pumps directly affects the stability and efficiency of the entire system. Among numerous performance indicators, sealing performance is one of the key factors for measuring the performance of water pumps. Currently, most water pumps on the market adopt the traditional single-layer housing design, which often fails to provide a durable and reliable sealing effect when facing application scenarios with high pressure differences or high-speed rotation.

[0003] In existing technical solutions, in order to improve the sealing performance of water pumps, engineers have tried various methods, such as using high-performance sealing materials, increasing the number of sealing rings or improving the design of sealing rings. Although these methods have improved the sealing effect to a certain extent, there are still limitations. For example, the cost of high-performance sealing materials is relatively high, and they may wear out rapidly under extreme working conditions; while increasing the number of sealing rings or improving the design may increase the complexity of the system and the difficulty of maintenance. The main problem existing in the existing water pump housing design is that under working conditions with high pressure differences or high-speed rotation, the traditional single-layer housing is difficult to provide sufficient sealing pressure, resulting in uneven pressure distribution between the sealing surfaces, thereby causing leakage. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a double-layer water pump shell with improved sealing performance to solve the problem of poor sealing effect easily caused by the existing single-layer housing design of water pumps.

[0005] To achieve the above purpose, the technical solution of the utility model is realized as follows:

[0006] A double-layer water pump shell with improved sealing performance, including an outer cylinder and an inner cylinder, arranged coaxially. There is a gap between the outer cylinder and the inner cylinder, and a stator is placed in the gap; there are two ring covers, which are hermetically arranged at the gaps at both ends of the outer cylinder and the inner cylinder; a rotor is inserted inside the inner cylinder, one end of the rotor is fixedly connected to an impeller, and the other end is rotatably connected to the ring cover through a thrust portion.

[0007] By adopting the above technical solution, a double-layer housing structure is realized, enhancing the rigidity and sealing performance of the housing, and effectively preventing leakage problems under working conditions with high pressure differences or high-speed rotation.

[0008] Furthermore, a first threaded hole for injecting casting liquid into the gap is opened on the ring cover, and a plug is screwed in the first threaded hole.

[0009] By adopting the above technical solution, the injection of the pouring liquid is facilitated, and the sealing effect between the stator and the housing is enhanced.

[0010] Furthermore, a groove for placing the plug is provided at the first threaded hole of the ring cover.

[0011] By adopting the above technical solution, a stable placement position is provided for the plug, preventing the plug from falling off during the operation of the water pump.

[0012] Furthermore, the thrust portion includes a smooth plate fixedly provided at the end of the rotor, a support block abutted against the smooth plate, and a cover body covering the outside of the support block and the smooth plate, and the support block is inserted into the cover body.

[0013] By adopting the above technical solution, a stable thrust structure is formed, improving the running stability of the rotor.

[0014] Furthermore, an end cover is rotatably connected to the rotor, and the end cover is fixedly installed on the ring cover.

[0015] By adopting the above technical solution, the fixed connection between the end cover and the ring cover is realized, enhancing the stability of the overall structure.

[0016] Furthermore, a second threaded hole is provided on the ring cover, and a stud through which the end cover and the cover body pass is screwed in the second threaded hole, and a nut for fastening the end cover and the cover body is provided at the top of the stud.

[0017] By adopting the above technical solution, the fastening connection between the end cover and the cover body is realized, improving the sealing performance and stability of the structure.

[0018] Furthermore, a slot is provided in the cover body, and a plug inserted into the slot is fixedly provided on the support block.

[0019] By adopting the above technical solution, the fixed connection between the support block and the cover body is realized, enhancing the stability of the thrust portion.

[0020] Furthermore, at least three groups of the support blocks are circumferentially arranged.

[0021] By adopting the above technical solution, the number of the support blocks is increased, improving the load-bearing capacity and stability of the thrust portion.

[0022] Compared with the prior art, the present utility model has the following beneficial effects:

[0023] The double-layer water pump housing for improving sealing performance according to the present utility model enhances the rigidity and sealing performance of the housing through the double-layer housing structure design, effectively preventing leakage problems under high pressure difference or high-speed rotation conditions; by providing a plug and a groove, it facilitates the injection of pouring liquid and enhances the sealing effect between the stator and the housing; through the stable structure design of the thrust portion, the operating stability of the rotor is improved; and through the fixed connection between the end cover and the ring cover, the stability of the overall structure is enhanced. Description of the Drawings

[0024] The drawings constituting a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation of the present utility model.

[0025] In the drawings:

[0026] Figure 1 is a schematic diagram of the overall structure of the double-layer water pump housing for improving sealing performance according to an embodiment of the present utility model;

[0027] Figure 2 is a partially exploded view of the stator and the outer cylinder according to an embodiment of the present utility model;

[0028] Figure 3 is a partially exploded view of the end cover and the ring cover according to an embodiment of the present utility model;

[0029] Figure 4 is a partial view of the rotor and the end cover according to an embodiment of the present utility model;

[0030] Figure 5 is a sectional view of the double-layer water pump housing for improving sealing performance according to an embodiment of the present utility model;

[0031] Figure 6 is a sectional view of the cover part according to an embodiment of the present utility model.

[0032] Description of the Reference Numerals:

[0033] 1. Outer cylinder; 2. Inner cylinder; 3. Gap; 4. Stator; 5. Ring cover; 6. Rotor;

[0034] 7. Thrust portion; 701. Smooth plate; 702. Support block; 703. Cover; 704. Slot; 705. Plug;

[0035] 8. First threaded hole; 9. Plug; 10. Groove; 11. End cover; 12. Second threaded hole; 13. Stud; 14. Nut. Detailed Embodiment

[0036] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0037] In the description of the present utility model, it should be noted that if terms indicating orientation or positional relationship such as "upper", "lower", "inner", "back", etc. appear, they are based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation on the present utility model. In addition, if terms such as "first", "second", etc. appear, they are also only for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0038] In addition, in the description of the present utility model, unless otherwise clearly defined, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood in combination with specific situations.

[0039] The present utility model will be described in detail below with reference to the drawings and in combination with embodiments.

[0040] This embodiment relates to a double-layer water pump housing for improving sealing performance. In terms of the overall structure, as Figure 1 and Figure 2 shown, it includes an outer cylinder 1, an inner cylinder 2, a ring cover 5, and a rotor 6.

[0041] Among them, the outer cylinder 1 and the inner cylinder 2 are arranged coaxially, there is a gap 3 between the outer cylinder 1 and the inner cylinder 2, a stator 4 is placed in the gap 3, the number of ring covers 5 is two, and they are hermetically arranged at the gaps 3 at both ends of the outer cylinder 1 and the inner cylinder 2. The rotor 6 is inserted inside the inner cylinder 2. One end of the rotor 6 is fixedly connected to the impeller, and the other end is rotatably connected to the ring cover 5 through a thrust portion 7.

[0042] It is worth mentioning that the stator 4 and the rotor 6 are conventional components in the motor and will not be elaborated here. The stator 4 is located between the outer cylinder 1 and the inner cylinder 2, and then the gap 3 is blocked by the ring cover 5. The ring cover 5 can be welded to the outer cylinder 1 and the inner cylinder 2. Such a setting can improve the sealing performance of the stator 4 and prevent the stator 4 from short-circuiting after contacting water. The rotor 6 is located inside the inner cylinder 2. Using the common force of the magnetic field on the current in the motor, the rotor 6 rotates. Then, after the rotor 6 passes through the inner cylinder 2, it is key-connected to the impeller, and the impeller is driven to rotate by the rotor 6 to achieve the water pumping function. The thrust portion 7 is located at one end of the rotor 6 away from the impeller, and the thrust portion 7 can ensure the stability of the rotor 6 during rotation.

[0043] Based on the above overall introduction, an exemplary structure of the double-layer water pump housing for improving the sealing performance in this embodiment is as follows Figure 6 As shown, a first threaded hole 8 for injecting casting liquid into the gap 3 is provided on the ring cover 5, and a plug 9 is screwed into the first threaded hole 8. A groove 10 for placing the plug 9 is provided at the position of the first threaded hole 8 on the ring cover 5.

[0044] Specifically, the casting liquid is a material such as resin, which is used to fix the winding, improve the insulation performance or enhance the heat dissipation effect. The casting liquid is injected into the first threaded hole 8, and then the first threaded hole 8 is blocked by a plunger. In order for the plunger not to occupy space, a groove 10 is provided on the ring cover 5. The groove 10 and the first threaded hole 8 are coaxially arranged to ensure that the plunger is located in the groove 10, which is convenient for the installation of the thrust portion 7.

[0045] As a preferred embodiment, as shown in Figure 3 and Figure 4 In this embodiment, the thrust portion 7 includes a smooth plate 701 fixedly arranged at the end of the rotor 6, a support block 702 abutted against the smooth plate 701, and a cover body 703 covering the outside of the support block 702 and the smooth plate 701. The support block 702 is inserted into the cover body 703. An end cover 11 is rotatably connected to the rotor 6, and the end cover 11 is fixedly installed on the ring cover 5.

[0046] It should be noted that the smooth plate 701 is circular, and the center is inserted into the rotor 6. It can be connected by a key or fixed to the rotor 6 by a nut. The support block 702 is fixed to the cover body 703. When the smooth plate 701 rotates, the support block 702 can ensure the stability of the rotation of the smooth plate 701. Before installation, the smooth plate 701 and the support block 702 are polished to reduce the friction between the smooth plate 701 and the support block 702. The end cover 11 is installed on the ring cover 5, the cover body 703 is installed on the end cover 11, the rotor 6 passes through the end cover 11, and the smooth plate 701 is located on the end face outside the end cover 11 to ensure that the smooth plate 701 can abut against the support block 702.

[0047] Preferably, as shown in Figure 3 , Figure 5 and Figure 6 In this embodiment, a second threaded hole 12 is provided on the ring cover 5, and a stud 13 for the end cover 11 and the cover body 703 to pass through is screwed into the second threaded hole 12. A nut 14 for fastening the end cover 11 and the cover body 703 is provided at the top of the stud 13. A slot 704 is provided in the cover body 703, and a plug rod 705 inserted into the slot 704 is fixedly arranged on the support block 702. At least three groups of support blocks 702 are arranged circumferentially.

[0048] Specifically, at least three second threaded holes 12 can be provided on the ring cover 5. The stud 13 is screwed to the second threaded hole 12. Through holes are respectively formed in the end cover 11 and the housing 703. The stud 13 is inserted into the through hole. By screwing the nut 14 to the stud 13, the end cover 11 and the housing 703 can be fastened to the ring cover 5. The connection between the ring cover 5, the end cover 11 and the housing 703 can be sealed by a sealing ring. At least three support blocks 702 are used and are arranged circumferentially and uniformly to ensure the uniformity of the force on the light plate 701 by the three support blocks 702. The design of the insertion rod 705 and the slot 704 is adopted to ensure the convenient disassembly and assembly of the support block 702. After removing the housing 703, only the insertion rod 705 on the support block 702 needs to be inserted into the slot 704, and then by screwing the nut 14 to the stud 13, it is ensured that the support block 702 is always in contact with the light plate 701.

[0049] In the double-layer water pump housing for improving the sealing performance in this embodiment, through the design of the double-layer housing structure, the rigidity and sealing performance of the housing are enhanced, effectively preventing leakage problems under high pressure difference or high-speed rotation conditions; by providing the plug 9 and the groove 10, the injection of the pouring liquid is facilitated, enhancing the sealing effect between the stator 4 and the housing; through the stable structure design of the thrust portion 7, the running stability of the rotor 6 is improved; through the fixed connection between the end cover 11 and the ring cover 5, the stability of the overall structure is enhanced.

[0050] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A double-layer water pump housing for improving sealing performance, characterized in that, Comprising: An outer cylinder (1) and an inner cylinder (2), arranged coaxially, with a gap (3) left between the outer cylinder (1) and the inner cylinder (2), and a stator (4) is placed in the gap (3); Ring covers (5), two in number, are hermetically arranged at the gaps (3) at both ends of the outer cylinder (1) and the inner cylinder (2); A rotor (6) is inserted inside the inner cylinder (2). One end of the rotor (6) is fixedly connected to an impeller, and the other end is rotatably connected to the ring cover (5) through a thrust portion (7).

2. The double-layer water pump housing for improving sealing performance according to claim 1, wherein: A first threaded hole (8) for injecting casting liquid into the gap (3) is formed in the ring cover (5), and a plug (9) is screwed into the first threaded hole (8).

3. The double-layer water pump housing for improving sealing performance according to claim 2, wherein: A groove (10) for placing the plug (9) is formed at the first threaded hole (8) of the ring cover (5).

4. The double-layer water pump housing for improving sealing performance according to claim 1, wherein: The thrust portion (7) includes a smooth plate (701) fixedly arranged at the end of the rotor (6), a support block (702) abutted against the smooth plate (701), and a cover body (703) covering the outside of the support block (702) and the smooth plate (701). The support block (702) is inserted into the cover body (703).

5. The double-layer water pump housing for improving sealing performance according to claim 4, wherein: An end cover (11) is rotatably connected to the rotor (6), and the end cover (11) is fixedly installed on the ring cover (5).

6. The double-layer water pump housing for improving sealing performance according to claim 5, wherein: A second threaded hole (12) is formed in the ring cover (5), and a stud (13) through which the end cover (11) and the cover body (703) pass is screwed into the second threaded hole (12). A nut (14) for fastening the end cover (11) and the cover body (703) is arranged at the top of the stud (13).

7. The double-layer water pump housing for improving sealing performance according to claim 4, wherein: A slot (704) is formed inside the cover body (703), and a plug rod (705) fixedly arranged on the support block (702) is inserted into the slot (704).

8. The double-layer water pump housing for improving sealing performance according to claim 7, wherein: At least three groups of the support blocks (702) are arranged circumferentially.

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