Magnetic coupling type dynamic balance impeller

Abstract

The utility model provides a magnetic coupling type dynamic balance impeller. The magnetic coupling type dynamic balance impeller comprises an impeller body, magnetic steel, an upper lining and a lower lining. The lower bush is installed at the center of one end face of the impeller body, the supporting piece, the annular fixing piece and the annular reinforcing piece are arranged on the other end face of the impeller body and are all coaxial with the lower bush, the upper bush is wrapped and fixed by the annular fixing piece, one end of the upper bush makes contact with the supporting piece, and the other end of the upper bush makes contact with the annular reinforcing piece. A plurality of first reinforcing ribs are arranged between the supporting piece and the annular fixing piece, a plurality of second reinforcing ribs are arranged between the annular fixing piece and the annular reinforcing piece, and magnetic steel is installed on the second reinforcing ribs. The supporting piece, the annular fixing piece, the annular reinforcing piece, the first reinforcing rib and the second reinforcing rib form a honeycomb structure, so that high structural strength is kept when the weight of the magnetic coupling type dynamic balance impeller is small, and the friction resistance of the magnetic coupling type dynamic balance impeller during operation is reduced.

Description

Technical Field

[0001] The utility model relates to the field of flow measurement, in particular to a magnetic coupling type dynamic balancing impeller. Background Art

[0002] At present, the main material of the impeller used in general dry water meters is ABS, which is composed of an impeller, an impeller shaft, a magnetic steel, etc. The combined impeller is heavy, resulting in large friction resistance and an unstable center of gravity. It is easy to cause unidirectional deviation during the rotation of the impeller, which means that it cannot meet the requirements of high metering levels. Under long-term friction, the bearings and corundum will cause a certain degree of wear, reducing the life of the water meter. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a magnetically coupled dynamically balanced impeller, which has the characteristics of reducing the weight of the magnetically coupled dynamically balanced impeller while ensuring the structural strength of the magnetically coupled dynamically balanced impeller, thereby reducing the friction resistance of the magnetically coupled dynamically balanced impeller during operation.

[0004] A magnetically coupled dynamically balanced impeller comprises an impeller body, a magnetic steel, an upper bushing and a lower bushing; a lower bushing is installed at the center of one end face of the impeller body, and a support member, an annular fixing member and an annular reinforcement member are provided on the other end face and are all coaxially arranged with the lower bushing; the upper bushing is wrapped and fixed by the annular fixing member, one end of the upper bushing is in contact with the support member, a plurality of first reinforcing ribs are provided between the support member and the annular fixing member, a plurality of second reinforcing ribs are provided between the annular fixing member and the annular reinforcement member, and a magnetic steel is installed on the second reinforcing ribs.

[0005] Through the above technical solution, the weight of the magnetic coupling dynamic balancing impeller is reduced, thereby reducing the friction resistance of the magnetic coupling dynamic balancing impeller during operation, while ensuring the structural strength of the magnetic coupling dynamic balancing impeller.

[0006] Preferably, the first reinforcing ribs are evenly arranged in a radial pattern between the support member and the annular fixing member, and the second reinforcing ribs are evenly arranged in a radial pattern between the annular fixing member and the annular reinforcing member.

[0007] Through the above technical solution, the support member, the annular fixing member, the annular reinforcement member, the first reinforcement rib and the second reinforcement rib form a honeycomb structure, so as to achieve a high structural strength when the weight of the magnetically coupled dynamic balancing impeller is small.

[0008] Preferably, the number of the first reinforcing ribs is 3, and the number of the second reinforcing ribs is 6.

[0009] Through the above technical solution, the distribution of the first reinforcing ribs and the second reinforcing ribs is made more reasonable, which is convenient for industrial production.

[0010] Preferably, a first groove is formed on the annular fixing member, and the first groove is used to connect the spaces inside and outside the annular fixing member. A second groove is formed on the first reinforcing rib, and the second groove is used to connect the spaces on both sides of the first reinforcing rib.

[0011] The above technical solution provides a first groove on the annular fixing member and a second groove on the first reinforcing rib, thereby preventing the annular fixing member from being blocked after the bushing is installed, ensuring that the water flow can fully fill the internal space of the annular fixing member. This prevents air from entering the impeller, thus avoiding weightlessness caused by air.

[0012] Preferably, a center hole is provided on the impeller body, and the center hole is used for installing the lower bushing.

[0013] Through the above technical solution, the installation structure of the lower bushing is made simpler and convenient for industrial production.

[0014] Preferably, two symmetrically arranged second reinforcing ribs are respectively provided with magnetic steel mounting grooves, and magnetic steel is installed on the magnetic steel mounting grooves.

[0015] Through the above technical solution, the magnetic field of the magnet is distributed more evenly in the impeller body, making the coupling between the magnet and the magnet that transmits signals in the water meter more stable.

[0016] Preferably, the impeller body, the upper bushing and the lower bushing are respectively made of polypropylene, and a counterweight is further installed on the impeller body, and the counterweight enables the magnetically coupled dynamic balancing impeller to be suspended in water.

[0017] Through the above technical solution, the magnetic coupling dynamic balancing impeller is placed in a state of equilibrium between gravity and buoyancy in water, further reducing the frictional resistance of the magnetic coupling dynamic balancing impeller during operation.

[0018] A first through hole and a second through hole are alternately arranged between the two end faces of the impeller body. The first through hole and the second through hole form a stepped surface. A counterweight is installed in the first through hole. A boss is arranged in the first through hole. The boss cooperates with the stepped surface to fix the counterweight.

[0019] Through the above technical solution, when the counterweight block needs to be replaced, a tool can be used to push the counterweight block out through the second through hole for replacement.

[0020] Preferably, n counterweights are evenly mounted on the impeller body, and the weight of each counterweight is W. 配重 ,

[0021] W 配重 =(V 总 *ρ 测量介质 -W 总 +F磁 )*ρ 配重 / n(ρ 配重 -ρ 测量介质 ),

[0022] V 总 =V 叶轮本体 +V 磁钢 +V 上衬套 +V 下衬套

[0023] W 总 =W 叶轮本体 +W 磁钢 +W 上衬套 +W 下衬套

[0024] F 磁 ≈B 2 ·A / 2·μ0·d

[0025] Where V 叶轮本体 is the volume of the impeller body; V 磁钢 is the volume of the magnet; V 上衬套 + is the volume of the upper bushing; V 下衬套 is the volume of the lower bushing; W 叶轮本体 is the weight of the impeller body; W 磁钢 is the weight of the magnet; W 上衬套 + is the weight of the upper bushing; W 下衬套 is the weight of the lower bushing; ρ 测量介质 is the density of the measuring medium; ρ 配重 is the density of the counterweight; F 磁 is the magnetic attraction; B is the magnetic field strength, A is the pole area, μ0 is the magnetic permeability in vacuum, and d is the distance between the magnet and the magnet it is coupled to.

[0026] The above technical solution can make it easier to calculate and design the mass of the counterweight.

[0027] Preferably, the counterweight is a ceramic counterweight.

[0028] Through the above technical solution, the chemical stability of the counterweight in water is higher.

[0029] The beneficial effects of the utility model are:

[0030] 1. The support member, the annular fixing member, the annular reinforcement member, the first reinforcement rib and the second reinforcement rib form a honeycomb structure to achieve a high structural strength when the weight of the magnetically coupled dynamic balancing impeller is small.

[0031] 2. A first groove is formed on the annular fixing member, and a second groove is formed on the first reinforcing rib to prevent the annular fixing member from being blocked after the bushing is installed. This ensures that the water flow can fill the internal space of the annular fixing member. No air will be trapped inside the impeller, thus avoiding weightlessness caused by air.

[0032] 3. The impeller body, upper bushing and lower bushing are made of polypropylene material, and the overall mass of the coupled dynamic balancing impeller is adjusted by the counterweight. The counterweight is easy to adjust and facilitates fine-tuning during testing.

[0033] 4. The counterweight is installed between the first through hole and the second through hole at the lower part of the impeller body to stabilize the bottom center of gravity and ensure the stability of the impeller rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without inventive work. Among them:

[0035] Figure 1 This is a top view of Example 1;

[0036] Figure 2 for Figure 1 AA cross-sectional view;

[0037] Figure 3 for Figure 1 BB cross-sectional view;

[0038] Figure 4 This is a bottom view of Example 1;

[0039] Figure 5 Schematic diagram of the impeller body structure;

[0040] Figure 6 is a top view of the impeller body;

[0041] Figure 7 for Figure 5 CC cross-sectional view;

[0042] Figure 8 for Figure 5 DD cross-sectional view; DETAILED DESCRIPTION

[0043] In order to make the above-mentioned purposes, features and advantages of the present invention more clearly understood, the following detailed description of the specific embodiments of the present invention is given in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can also be implemented in other ways different from the description. Those skilled in the art can make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0044] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0045] Example 1

[0046] like Figure 1-8 As shown, a magnetically coupled dynamic balancing impeller includes an impeller body 1, a magnetic steel 2, an upper bushing 3 and a lower bushing 4.

[0047] The magnetic coupling dynamic balancing impeller manufactured in this embodiment is used in a water meter, and its working environment is water at room temperature. The impeller body 1 of this embodiment is made of polypropylene injection molding.

[0048] The impeller body 1 comprises a support member 11, an annular fixing member 12, and an annular reinforcement member 14. A central hole 15 is provided on one end face of the impeller body 1, into which the lower bushing 4 is mounted. A support member 11 is provided on one end face of the impeller body 1, and is used to support the upper bushing 3. The annular fixing member 12 is positioned around the upper bushing 3 to wrap around and secure it. The upper bushing 3 is mounted within the space formed by the annular fixing member 12, with the end of the upper bushing 3 in contact with the support member 11.

[0049] The annular fixing member 12 is provided with a first groove 121, which connects the spaces inside and outside the annular fixing member 12. When installed in water, water flows through the first groove 121 and fills the space inside the annular fixing member 12. The support member 11 is located at the center of the annular fixing member 12. A plurality of first reinforcing ribs 18 are radially arranged between the support member 11 and the annular fixing member 12. The first reinforcing ribs 18 are provided with second grooves 181, which connect the spaces on either side of the first reinforcing ribs 18. This allows water to flow between the spaces divided by the first reinforcing ribs 18. The annular reinforcement member 14 is coaxially disposed outside the annular fixing member 12. A plurality of second reinforcing ribs 15 are disposed between the annular fixing member 12 and the annular reinforcement member 14. The support member 11, first reinforcing ribs 18, annular fixing member 12, second reinforcing ribs 15, and annular reinforcement member 14 form a honeycomb structure, which ensures sufficient structural strength while reducing the weight of the impeller body 1.

[0050] Two of the second reinforcing ribs 13 are provided with magnetic steel installation slots 131, and the magnetic steel 2 is installed in the magnetic steel installation slots 131. The magnetic steel is coupled with the magnet on the metering device in the water meter to transmit the water flow signal.

[0051] Six first through holes 16 and six second through holes 17 are interlaced between the two end surfaces of the impeller body 1. Each first through hole 16 corresponds to and partially connects with one of the second through holes 17. The first through holes 16 and the second through holes 17 form a stepped surface. The counterweight 5 is mounted in the space where the first and second through holes 16 and 17 intersect. A boss 161 is provided on the inner wall of the first through hole 16, and the boss 161 cooperates with the stepped surface to secure the counterweight 5.

[0052] The counterweight 5 is used to adjust the weight of the magnetically coupled dynamic balancing impeller so that the magnetically coupled dynamic balancing impeller can be suspended in water. Assuming that the number of counterweights is n, in this embodiment n=6, the weight of each counterweight is calculated as follows:

[0053] W 配重 =(V 总 *ρ 测量介质 -W 总 +F 磁 )*ρ 配重 / n(ρ 配重 -ρ 测量介质 )

[0054] V 总 =V 叶轮本体 +V 磁钢 +V 上衬套 +V 下衬套

[0055] W 总 =W叶轮本体 +W 磁钢 +W 上衬套 +W 下衬套

[0056] F 磁 ≈B 2 ·A / 2·μ0·d

[0057] Where W 配重 is the weight of each counterweight; V 叶轮本体 is the volume of the impeller body; V 磁钢 is the volume of the magnet; V 上衬套 + is the volume of the upper bushing; V 下衬套 is the volume of the lower bushing; W 叶轮本体 is the weight of the impeller body; W 磁钢 is the weight of the magnet; W 上衬套 + is the weight of the upper bushing; W 下衬套 is the weight of the lower bushing; ρ 测量介质 is the density of the measuring medium; ρ 配重 is the density of the counterweight; F 磁 is the magnetic attraction; B is the magnetic field strength, A is the pole area, μ0 is the magnetic permeability in vacuum, and d is the distance between the magnet and the magnet it is coupled to.

[0058] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, and all of these should be included in the scope of the claims of the present invention.

Claims

1. A magnetically coupled dynamic balancing impeller, characterized in that: The invention comprises an impeller body (1), a magnetic steel (2), an upper bushing (3) and a lower bushing (4); a lower bushing (4) is installed at the center of one end face of the impeller body (1), and a support member (11), an annular fixing member (12) and an annular reinforcement member (14) are provided on the other end face and are coaxially arranged with the lower bushing (4); the upper bushing (3) is wrapped and fixed by the annular fixing member (12); one end of the upper bushing (3) is in contact with the support member (11); a plurality of first reinforcement ribs (18) are provided between the support member (11) and the annular fixing member (12); a plurality of second reinforcement ribs (13) are provided between the annular fixing member (12) and the annular reinforcement member (14); and a magnetic steel (2) is installed on the second reinforcement rib (13).

2. The magnetically coupled dynamic balancing impeller according to claim 1, characterized in that: The first reinforcing ribs (18) are evenly arranged in a radial pattern between the support member (11) and the annular fixing member (12), and the second reinforcing ribs (13) are evenly arranged in a radial pattern between the annular fixing member (12) and the annular reinforcing member (14).

3. The magnetically coupled dynamic balancing impeller according to claim 1, characterized in that: The number of the first reinforcing ribs (18) is 3, and the number of the second reinforcing ribs (13) is 6.

4. The magnetically coupled dynamic balancing impeller according to claim 1, characterized in that: The annular fixing member (12) is provided with a first groove (121), and the first groove (121) is used to connect the space inside and outside the annular fixing member (12); the first reinforcing rib (18) is provided with a second groove (181), and the second groove (181) is used to connect the space on both sides of the first reinforcing rib (18).

5. The magnetically coupled dynamic balancing impeller according to claim 1, characterized in that: The impeller body (1) is provided with a central hole (15), and the central hole (15) is used for installing a lower bushing (4).

6. The magnetically coupled dynamic balancing impeller according to claim 1, characterized in that: Two symmetrically arranged second reinforcing ribs (13) are respectively provided with magnetic steel installation grooves (131), and magnetic steel (2) is installed on the magnetic steel installation grooves (131).

7. The magnetically coupled dynamically balanced impeller according to claim 1, characterized in that: The impeller body (1), the upper bushing (3) and the lower bushing (4) are respectively made of polypropylene. A counterweight (5) is also installed on the impeller body (1). The counterweight (5) enables the magnetic coupling dynamic balancing impeller to be suspended in water.

8. The magnetically coupled dynamic balancing impeller according to claim 6, characterized in that: A first through hole (16) and a second through hole (17) are alternately arranged between the two end faces of the impeller body (1); the first through hole (16) and the second through hole (17) form a stepped surface; a counterweight (5) is installed in the first through hole (16); a boss (161) is arranged in the first through hole (16); the boss (161) cooperates with the stepped surface to fix the counterweight (5).

9. The magnetically coupled dynamic balancing impeller according to claim 6, characterized in that: The impeller body (1) is evenly mounted with n counterweights (5), and the weight of each counterweight (5) is W. 配重 , W 配重 =(V 总 *r 测量介质 -W 总 +F 磁 )*r 配重 / n(p 配重 -r 测量介质 ), V 总 =V 叶轮本体 +V 磁钢 +V 上衬套 +V 下衬套 IN 总 =In 叶轮本体 +W 磁钢 +W 上衬套 +W 下衬套 F 磁 ≈B 2 ·A / 2·μ0·d Where V 叶轮本体 is the volume of the impeller body; V 磁钢 is the volume of the magnet; V 上衬套 + is the volume of the upper bushing; V 下衬套 is the volume of the lower bushing; W 叶轮本体 is the weight of the impeller body; W 磁钢 is the weight of the magnet; W 上衬套 + is the weight of the upper bushing; W 下衬套 is the weight of the lower bushing; ρ 测量介质 is the density of the measuring medium; ρ 配重 is the density of the counterweight; F 磁 is the magnetic attraction; B is the magnetic field strength, A is the pole area, μ0 is the magnetic permeability in vacuum, and d is the distance between the magnet and the magnet it is coupled to.

10. The magnetically coupled dynamic balancing impeller according to claim 7, characterized in that: The counterweight (5) is a ceramic counterweight.

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