Shield pump impeller sealing assembly structure

By using a combined sealing mechanism of mounting ring and elastic sealing ring in the shielding pump, the efficiency loss problem caused by leakage of volute shell and impeller is solved, reducing manufacturing costs and significantly improving the efficiency of the pump.

CN222596379UActive Publication Date: 2025-03-11BROAD OCEAN MOTOR FUEL CELL TECH (ZHONGSHAN) CO LTD
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Patent Information

Application Number
CN202420243792.4
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-01-31
Publication Date
2025-03-11
Estimated Expiration
2034-01-31

AI Technical Summary

Technical Problem

The leakage of the gap between the volute and the impeller in the existing shielded pump leads to loss of efficiency, and the high machining accuracy of the parts leads to high manufacturing costs and poor efficiency.

Method used

A shielded pump impeller seal assembly structure is designed, and a combined sealing mechanism of the mounting ring and the elastic sealing ring is used. The mounting ring is pressed on the inner wall of the volute. The elastic sealing ring is installed inside the mounting ring, and the inner side abuts the outer side of the impeller to form a tip to reduce friction and enhance the seal.

Benefits of technology

Basically eliminate the gap between the volute and the impeller in the shielded pump, reduce the processing accuracy requirements of parts, reduce manufacturing costs, and significantly improve the efficiency of the pump.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a shield pump impeller sealing assembly structure, which comprises a motor, a volute and an impeller, the volute is arranged on the motor, a pump cavity is arranged in the volute, the impeller is arranged in the pump cavity, a shaft extension end of a rotating shaft of the motor is connected with the impeller, and a sealing mechanism is arranged between the outer side of the impeller and the inner wall of the volute. The sealing mechanism comprises an installation ring and an elastic sealing ring, the installation ring is installed on the inner wall of the volute in a pressed mode, the elastic sealing ring is installed in the installation ring, and the installation ring is installed in the volute in a pressed mode and has elastic compensation. The elastic sealing ring is installed in the installation ring, after the inner side of the elastic sealing ring is designed to be in a tip shape, the elastic sealing ring abuts against the outer side of the impeller, the sealing effect is achieved while friction is reduced through the design, the elastic sealing ring and the sealing tongue are made of rubber materials, and when the pressure difference between an inlet of the impeller and the interior of the volute is large, the sealing tongue abuts against the outer side wall of the impeller, and sealing is enhanced. The three parts are integrally formed through injection molding, the efficiency of the water pump is effectively improved, cost is low, the structure is simple, installation and maintenance are convenient, and space is saved.
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Description

Technical Field

[0001] The utility model relates to a field, in particular to a shielded pump impeller sealing component structure. Background Art

[0002] In the design and application of existing centrifugal pumps, especially shielded structures, in order to improve the efficiency of the water pump, it is usually necessary to consider reducing various possible losses, among which volume loss, that is, the loss caused by leakage in the gap between the stationary volute and the rotating impeller. In order to reduce this loss, usually only a very small gap is left between the impeller and the volute, see Figure 1 As shown, this type of structure requires high precision in parts processing and still has relatively large efficiency losses. Summary of the invention

[0003] One purpose of the utility model is to provide a shielded pump impeller sealing assembly structure, which solves the technical problems of the loss caused by the gap leakage between the volute and the impeller in the shielded pump of the prior art, the high manufacturing cost caused by the high processing accuracy of parts, and the still poor efficiency.

[0004] The technical solution of the utility model is achieved as follows: a shielded pump impeller sealing component structure, a motor, a volute and an impeller, the volute is installed on the motor, a pump chamber is arranged inside the volute, the impeller is placed inside the pump chamber, the shaft extension end of the motor's rotating shaft is connected to the impeller, a sealing mechanism is arranged between the outer side of the impeller and the inner wall of the volute, the sealing mechanism includes a mounting ring and an elastic sealing ring, the mounting ring is pressed onto the inner wall of the volute, the elastic sealing ring is installed inside the mounting ring, and the inner side of the elastic sealing ring abuts against the outer side of the impeller.

[0005] Furthermore, a sealing tongue extends from the elastic sealing ring, and the end of the sealing tongue abuts against the outer side of the impeller.

[0006] Furthermore, the mounting ring, the elastic sealing ring and the sealing tongue are integrally injection molded.

[0007] Furthermore, the inner side of the elastic sealing ring forms a tip portion, and the tip portion abuts against the outer side of the impeller.

[0008] Furthermore, the mounting ring comprises a cylindrical portion and a bottom plate, the elastic sealing ring is supported on the bottom plate, a baffle plate extends outwardly from the elastic sealing ring, and the baffle plate abuts against the inner wall of the cylindrical portion.

[0009] Furthermore, a step is provided below the water inlet of the volute, and the top end of the cylindrical portion of the mounting ring abuts against the step.

[0010] Furthermore, the motor includes a rotor assembly, a stator assembly, a rotating shaft, a front end cover, a rear end cover, a shielding sleeve and a shell. The front end cover and the rear end cover are respectively installed at the two ends of the shell. The front end cover, the rear end cover and the shell form an accommodating cavity. The rotor assembly and the stator assembly are installed in the accommodating cavity. A shielding sleeve is installed between the rotor assembly and the stator assembly, and the volute is installed on the front end cover.

[0011] Furthermore, the outer side of the elastic sealing ring is tightened by an annular spring.

[0012] Furthermore, the mounting ring is made of metal material, or plastic or ceramic material; the elastic sealing ring is made of rubber material.

[0013] A shielded pump impeller sealing component structure comprises a motor, a volute and an impeller, wherein the volute is mounted on the motor, a pump chamber is arranged inside the volute, the impeller is placed inside the pump chamber, the shaft extension end of the motor's rotating shaft is connected to the impeller, a sealing member is arranged between the outer side of the impeller and the inner wall of the volute, and the sealing member is an elastic sealing ring, the inner side of the elastic sealing ring abuts against the outer side of the impeller.

[0014] Furthermore, a sealing tongue extends from the elastic sealing ring, and the end of the sealing tongue abuts against the outer side of the impeller.

[0015] Furthermore, the elastic sealing ring, the sealing tongue and the volute are integrally injection molded.

[0016] Furthermore, the motor includes a rotor assembly, a stator assembly, a rotating shaft, a front end cover, a rear end cover, a shielding sleeve and an outer shell. The front end cover and the rear end cover are respectively installed at the two ends of the outer shell. The front end cover, the rear end cover and the outer shell form an accommodating cavity. The rotor assembly and the stator assembly are installed in the accommodating cavity. A shielding cover is installed between the rotor assembly and the stator assembly, and the volute is installed on the front end cover.

[0017] Compared with the prior art, the utility model has the following advantages:

[0018] 1. A sealing mechanism is arranged between the outer side of the impeller and the inner wall of the volute, and the sealing mechanism comprises a mounting ring and an elastic sealing ring. The mounting ring is pressed onto the inner wall of the volute, and the elastic sealing ring is installed inside the mounting ring. The inner side of the elastic sealing ring abuts against the outer side of the impeller, thereby basically eliminating the gap between the volute and the impeller in the canned pump, and the requirements for the machining accuracy of the parts are not high, the manufacturing cost can be reduced, and the efficiency is greatly improved.

[0019] 2. The mounting ring is pressed into the volute and has elastic force compensation. The elastic sealing ring is installed in the mounting ring, and the inner side of the elastic sealing ring is designed to be pointed and abuts against the outer side of the impeller. This design reduces friction while achieving a sealing effect. The elastic sealing ring and the sealing tongue are made of rubber. When the pressure difference between the impeller inlet and the volute is large, the sealing tongue abuts against the outer wall of the impeller to enhance the sealing.

[0020] 3. The mounting ring, elastic sealing ring and sealing tongue are integrally injection molded, which effectively improves the efficiency of the water pump, has low cost, simple structure, convenient installation and maintenance, and saves space. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the cross-sectional structure of a canned motor pump provided by the prior art;

[0022] Figure 2 It is a three-dimensional schematic diagram of the overall structure provided by the first embodiment of the utility model;

[0023] Figure 3 yes Figure 2 Schematic diagram of the cross-sectional structure of AA;

[0024] Figure 4 It is a cross-sectional schematic diagram of the combined structure of the front end cover and the impeller of the canned motor pump provided in the first embodiment of the utility model;

[0025] Figure 5 is a three-dimensional schematic diagram of the sealing assembly provided in the first embodiment after a spring is added;

[0026] Figure 6 yes Figure 5 Schematic diagram of the cross-section structure provided by CC;

[0027] Figure 7 It is a three-dimensional schematic diagram of the overall structure of the canned motor pump provided in the second embodiment of the utility model;

[0028] Figure 8 yes Figure 7 Schematic diagram of the cross-sectional structure of the middle BB;

[0029] Fig. 9 It is a cross-sectional schematic diagram of the integrated volute and elastic sealing ring combined structure provided in the second embodiment of the present utility model;

[0030] Fig.10 is a three-dimensional schematic diagram of a sealing member provided in Embodiment 2;

[0031] Fig.11 yes Fig.10 Schematic diagram of the cross-sectional structure provided by DD. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] Embodiment 1:

[0034] like Figures 2 to 6 As shown, this embodiment provides: a shielded pump impeller sealing assembly structure, a motor 100, a volute 5 and an impeller 10, the volute 5 is mounted on the motor 100, a pump chamber is arranged inside the volute 5, the impeller 10 is placed inside the pump chamber, the shaft extension end of the rotating shaft 4 of the motor 100 is connected to the impeller 10, and a sealing mechanism 1 is arranged between the outer side of the impeller 10 and the inner wall of the volute 5, and the sealing mechanism 1 includes a mounting ring 11 and an elastic sealing ring 12, the mounting ring 11 is pressed on the inner wall of the volute 5, the elastic sealing ring 12 is installed in the mounting ring 11, and the inner side of the elastic sealing ring 12 abuts against the outer side of the impeller 10. In this embodiment, the mounting ring 11 is made of metal material, and the elastic sealing ring 12 is made of rubber material. By arranging a mounting ring 11 and an elastic sealing ring 12 in the volute 5, the effect of sealing the connection between the impeller 10 and the volute 5 is achieved. That is, the gap between the volute and the impeller in the shielded pump is basically eliminated, and the requirements for the processing accuracy of the parts are not high, the manufacturing cost can be reduced, and the efficiency is greatly improved. See the efficiency comparison in Table 1 below (the gap in this patent application is 0)

[0035]

[0036] Table 1

[0037] Furthermore, a sealing tongue 13 extends from the elastic sealing ring 12, and the end of the sealing tongue 13 abuts against the outer side of the impeller 10. The sealing tongue 12 is made of rubber material, and when the pressure difference between the impeller inlet and the volute is large, the sealing tongue abuts against the outer side wall of the impeller to enhance the seal.

[0038] Furthermore, the mounting ring 11, the elastic sealing ring 12 and the sealing tongue 13 are integrally injection molded, which effectively improves the efficiency of the water pump, has low cost, simple structure, convenient installation and maintenance, and saves space.

[0039] Furthermore, the inner side of the elastic sealing ring 12 forms a tip portion 121. The tip portion 121 is designed to effectively reduce the friction with the outer side wall of the impeller 10.

[0040] Furthermore, the mounting ring 11 includes a cylindrical portion 111 and a bottom plate 112. The elastic sealing ring 12 is supported on the bottom plate 112. A baffle 113 extends outward from the elastic sealing ring 12. The baffle 113 abuts against the inner wall of the cylindrical portion 111. During injection molding, the injection liquid can be formed by the cylindrical portion 111, the bottom plate 112 and the baffle 113 being connected to each other and integrally injection-molded.

[0041] Furthermore, a step 52 is provided below the water inlet 51 of the volute 5, and the top of the cylindrical portion 111 of the mounting ring 11 abuts against the step 52. The mounting ring 11 has a certain elastic force compensation, and the mounting ring 11 is pressed on the top of the cylindrical portion 111.

[0042] Furthermore, the motor 100 includes a rotor assembly 2, a stator assembly 3, a rotating shaft 4, a front end cover 61, a rear end cover 62, a shielding sleeve 8 and a shell 7. The front end cover 61 and the rear end cover 62 are respectively installed at two ends of the shell 7. The front end cover 61, the rear end cover 62 and the shell 7 form an accommodating cavity 9. The rotor assembly 2 and the stator assembly 3 are installed in the accommodating cavity 9. A shielding sleeve 8 is installed between the rotor assembly 2 and the stator assembly 3, and the volute 5 is installed on the front end cover 61.

[0043] Furthermore, an annular spring 14 is clamped on the outside of the elastic sealing ring 12. The annular spring 14 clamps the elastic sealing ring 12 to ensure that the elastic sealing ring 12 is in contact with the outer circumferential surface of the impeller 10.

[0044] Embodiment 2:

[0045] like Figures 7 to 11 As shown, a shielded pump impeller sealing assembly structure includes a motor 100, a volute 5 and an impeller 10. The volute 5 is mounted on the motor 100. A pump chamber 51 is provided inside the volute 5. The impeller 10 is placed inside the pump chamber 51. The shaft extension end of the rotating shaft 4 of the motor 100 is connected to the impeller 10. A sealing mechanism 1 is provided between the outer side of the impeller 10 and the inner wall of the volute 5. The sealing mechanism 1 is an elastic sealing ring 12. The inner side of the elastic sealing ring 12 abuts against the outer side of the impeller 10. By providing an elastic sealing ring 12 in the volute 5 and the elastic sealing ring 12 is sleeved outside the impeller 10, a sealing effect is achieved. The elastic sealing ring 12 is made of rubber material and has a certain elasticity. The gap between the volute 5 and the impeller 10 in the shielded pump is basically eliminated. The machining accuracy of the parts is not required to be high, the manufacturing cost can be reduced, and the efficiency is greatly improved.

[0046] Furthermore, a sealing tongue 13 extends from the elastic sealing ring 12, and the end of the sealing tongue 13 abuts against the outer side of the impeller 10. The sealing tongue 12 is made of rubber material, and when the pressure difference between the impeller inlet and the volute is large, the sealing tongue abuts against the outer side wall of the impeller to enhance the seal.

[0047] Furthermore, the elastic sealing ring 12, the sealing tongue 13 and the volute 5 are integrally injection molded, which effectively improves the efficiency of the water pump, has low cost, simple structure, convenient installation and maintenance, and saves space.

[0048] Furthermore, the motor 100 includes a rotor assembly 2, a stator assembly 3, a rotating shaft 4, a front end cover 61, a rear end cover 62, a shielding sleeve 8 and a shell 7. The front end cover 5 and the rear end cover 6 are respectively installed at both ends of the shell 7. The front end cover 61, the rear end cover 62 and the shell 7 form an accommodating cavity 9. The rotor assembly 2 and the stator assembly 3 are installed in the accommodating cavity 9. A shielding sleeve 8 is installed between the rotor assembly 2 and the stator assembly 3, and the volute 5 is installed on the front end cover 61.

[0049] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited thereto. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present invention are equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A shielded pump impeller sealing assembly structure, comprising a motor (100), a volute (5) and an impeller (10), wherein the volute (5) is mounted on the motor (100), a pump chamber is arranged inside the volute (5), the impeller (10) is arranged inside the pump chamber, the shaft extension end of the rotating shaft (4) of the motor (100) is connected to the impeller (10), and a sealing mechanism (1) is arranged between the outer side of the impeller (10) and the inner wall of the volute (5), characterized in that: The sealing mechanism (1) comprises a mounting ring (11) and an elastic sealing ring (12); the mounting ring (11) is pressed onto the inner wall of the volute (5); the elastic sealing ring (12) is installed inside the mounting ring (11); and the inner side of the elastic sealing ring (12) abuts against the outer side of the impeller (10).

2. A shielded pump impeller seal assembly structure according to claim 1, characterized in that: A sealing tongue (13) extends from the elastic sealing ring (12), and the end of the sealing tongue (13) abuts against the outer side of the impeller (10).

3. A shielded pump impeller seal assembly structure according to claim 2, characterized in that: The mounting ring (11), the elastic sealing ring (12) and the sealing tongue (13) are integrally injection-molded.

4. A shielded pump impeller seal assembly structure according to claim 3, characterized in that: The inner side of the elastic sealing ring (12) forms a tip portion (121), and the tip portion (121) abuts against the outer side of the impeller (10).

5. A shielded pump impeller seal assembly structure according to claim 1, 2 or 3, characterized in that: The mounting ring (11) comprises a cylindrical portion (111) and a bottom plate (112). The elastic sealing ring (12) is supported on the bottom plate (112). A baffle (113) extends outward from the elastic sealing ring (12), and the baffle (113) abuts against the inner wall of the cylindrical portion (111).

6. A shielded pump impeller seal assembly structure according to claim 5, characterized in that: A step (52) is provided below the water inlet (51) of the volute (5), and the top end of the cylindrical portion (111) of the mounting ring (11) abuts against the step (52).

7. A shielded pump impeller seal assembly structure according to claim 6, characterized in that: The motor (100) comprises a rotor assembly (2), a stator assembly (3), a rotating shaft (4), a front end cover (61), a rear end cover (62), a shielding sleeve (8) and a housing (7). The front end cover (61) and the rear end cover (62) are respectively mounted at two ends of the housing (7). The front end cover (61), the rear end cover (62) and the housing (7) form a receiving cavity (9). The rotor assembly (2) and the stator assembly (3) are mounted in the receiving cavity (9). A shielding sleeve (8) is mounted between the rotor assembly (2) and the stator assembly (3). The volute (5) is mounted on the front end cover (61).

8. A shielded pump impeller seal assembly structure according to claim 1, 2 or 3, characterized in that: The elastic sealing ring (12) is tightened by an annular spring (14) on the outside.

9. A shielded pump impeller seal assembly structure according to claim 1, 2 or 3, characterized in that: The mounting ring (11) is made of metal material, or plastic or ceramic material; the elastic sealing ring (12) is made of rubber material.

10. A shielded pump impeller sealing assembly structure, comprising a motor (100), a volute (5) and an impeller (10), wherein the volute (5) is mounted on the motor (100), a pump chamber is arranged inside the volute (5), the impeller (10) is arranged inside the pump chamber, the shaft extension end of the rotating shaft (4) of the motor (100) is connected to the impeller (10), and a sealing mechanism (1) is arranged between the outer side of the impeller (10) and the inner wall of the volute (5), characterized in that: The sealing mechanism (1) is an elastic sealing ring (12), and the inner side of the elastic sealing ring (12) abuts against the outer side of the impeller (10).

11. A shielded pump impeller seal assembly structure according to claim 10, characterized in that: A sealing tongue (13) extends from the elastic sealing ring (12), and the end of the sealing tongue (13) abuts against the outer side of the impeller (10).

12. A shielded pump impeller seal assembly structure according to claim 10 or 11, characterized in that: The elastic sealing ring (12), the sealing tongue (13) and the volute (5) are integrally injection-molded.