CN216524132U

CN216524132U - Impeller assembly and flow meter

Info

Publication number: CN216524132U
Application number: CN202123439546.1U
Authority: CN
Inventors: 柯天津
Original assignee: Xiamen Jingzhun Intelligent Water Meter Co ltd
Current assignee: Xiamen Jingzhun Intelligent Water Meter Co ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-05-13
Anticipated expiration: 2031-12-31

Abstract

The utility model relates to the field of water flow sensors, in particular to an impeller assembly and a flowmeter, wherein the impeller assembly comprises a front support body, an impeller and a rear support body which are coaxially connected in sequence along the water flow direction; the impeller comprises a circular ring part and a rotating shaft part positioned in the center of the inside of the circular ring part, and the circular ring part is connected with the rotating shaft part through a plurality of spiral curved surface blades distributed along the radial direction; guide grooves are further arranged on the outer side of the circumference of the circular ring part at intervals, the two side faces of each guide groove are arc-shaped curved surfaces, and straight lines where the two ends of each arc-shaped curved surface are located are intersected with the water flow direction and are not perpendicular to the water flow direction; the center shaft of impeller wears to locate in the pivot portion, and both ends rotate with the bearing of installing on front support body and back supporter respectively and be connected. The impeller in the impeller assembly is provided with the spiral curved surface blades and the guide grooves on the inner side and the outer side of the circumference of the circular ring part respectively, so that the impeller can be driven to rotate under the condition of extremely low axial water flow so as to further improve the metering sensitivity.

Description

Impeller assembly and flow meter

Technical Field

The utility model relates to the field of water flow sensors, in particular to an impeller assembly and a flowmeter.

Background

The water flow sensor, also called flowmeter, is an instrument for detecting water flow by sensing water flow and outputting signals such as current, voltage and the like, and can be used for management and flow calculation in water control. The magnetic impeller is a core part in the water flow sensor, and the structure and the quality of the magnetic impeller directly influence the metering accuracy of the water flow sensor, so that the improvement of the structure of the magnetic impeller of the water flow sensor and the improvement of the service life of the magnetic impeller of the water flow sensor are very important.

If the publication number is CN206556702U, the publication date is 2017, 10 and 13, a magnetic impeller device of a water flow sensor is disclosed, which comprises an impeller base, guide vanes, a permanent magnet packaging cavity, permanent magnets, a concave table type guide shaft hole and a convex table type guide shaft, wherein the guide vanes are uniformly distributed around the impeller base in a divergent shape, the permanent magnets are packaged in the permanent magnet packaging cavity at one time by the permanent magnet packaging cavity, the permanent magnet packaging cavity is arranged in an annular shape, the permanent magnets are annular magnets, and the convex table type guide shaft and the concave table type guide shaft hole are concentric and provide guide support for the magnetic impeller. The boss type guide shaft of the technical scheme is matched with the fixed shaft with the same shape, so that higher concentricity is achieved, and the metering precision of the water flow sensor is greatly improved; and the wear resistance is higher, the probability of dead clamping of the impeller is greatly reduced, and the service life of the product is greatly prolonged.

SUMMERY OF THE UTILITY MODEL

In order to improve the accuracy of the measurement of the water flow sensor, the utility model provides an impeller assembly which comprises a front support body, an impeller and a rear support body which are coaxially connected in sequence along the water flow direction;

the impeller comprises a circular ring part and a rotating shaft part positioned in the center of the inside of the circular ring part, and the circular ring part is connected with the rotating shaft part through a plurality of spiral curved surface blades distributed along the radial direction;

guide grooves are further arranged on the outer side of the circumference of the circular ring part at intervals, two side faces of each guide groove are arc-shaped curved faces, and straight lines at two ends of each arc-shaped curved face are intersected with the water flow direction and are not perpendicular to the water flow direction;

the center shaft of impeller wears to locate in the pivot portion, and both ends respectively with install the bearing rotation connection on preceding supporter and the back supporter.

In one embodiment, two end faces of the guide groove are respectively on the same plane with the end face of the ring part close to the guide groove.

In one embodiment, the number of the guide grooves is 4.

In one embodiment, the number of the helical curved surface blades is 2, and the helical curved surface blades are arranged in a centrosymmetric manner.

In one embodiment, the bearing is made of ruby.

In one embodiment, the front support body and the rear support body are both annular structural bodies, a bearing portion for mounting a bearing is arranged in the center of the front support body and the rear support body, the annular structural bodies are connected with the bearing portion through a plurality of support plates distributed along the radial direction, and a water passing passage is formed between the support plates.

In one embodiment, an end of the bearing portion of the rear support body, which end is remote from the bearing, is provided as a tip.

In one embodiment, the axial end face of the circular ring part is symmetrically provided with groove bodies for placing the magnetic steel.

In one embodiment, the magnetic steel in the groove body forms a closed structure through encapsulation.

The utility model also provides a flow meter employing an impeller assembly as described in any of the above.

Based on the above, compared with the prior art, the impeller assembly provided by the utility model is composed of the front support body, the impeller and the rear support body which are coaxially connected in sequence, so that the rotation concentricity of the impeller can be improved, and the service life is prolonged; the inner side and the outer side of the circumference of the circular ring part of the impeller are respectively provided with a spiral curved surface blade and a guide groove, so that the impeller can be driven to rotate under the condition of extremely low axial water flow so as to further improve the metering sensitivity.

Additional features and advantages of the utility model will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model. The objectives and other advantages of the utility model will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts; in the following description, the drawings are illustrated in a schematic view, and the drawings are not intended to limit the present invention.

FIG. 1 is a schematic view of an embodiment of an impeller assembly provided by the present invention;

FIG. 2 is an exploded view of FIG. 1;

FIG. 3 is a schematic structural diagram of an embodiment of an impeller;

FIG. 4 is a schematic view of another angle of the impeller of FIG. 3;

FIG. 5 is a schematic structural view of an embodiment of a front support;

fig. 6 is a schematic structural view of an embodiment of the rear support body.

Reference numerals are as follows:

110 front support 200 impeller 230 helical curved blade

120 back supporter 210 circular ring part 240 guide groove

130 bearing portion 211 groove body 250 center shaft

140 support plate 220 rotation shaft part

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments; the technical features designed in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other; all other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be noted that all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs, and are not to be construed as limiting the present invention; it will be further understood that terms used herein should be interpreted as having a meaning that is consistent with their meaning in the context of this specification and the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

Referring to fig. 1 and 2, the present invention provides an embodiment of an impeller assembly, which includes a front supporter 110, an impeller 200, and a rear supporter 120 coaxially connected in sequence in a water flow direction;

the impeller 200 is composed of a circular ring part 210 and a rotating shaft part 220 positioned in the center of the circular ring part 210, the circular ring part 210 and the rotating shaft part 220 are fixedly connected through a plurality of spiral curved surface blades 230 distributed along the radial direction, and two end surfaces of each spiral curved surface blade 230 are respectively flush with the end surface of the circular ring part close to each other, so that when water flows through the spiral curved surface blades 230, the impeller 200 is driven to rotate;

preferably, referring to fig. 4, in an embodiment, the number of the helical cambered vanes 230 is 2, and the helical cambered vanes are arranged in a central symmetry manner, so that the measuring precision is improved, and the processing and manufacturing cost and the material cost can be reduced.

The guide groove 240 is arranged on the outer side of the circumference of the circular ring portion 210 at intervals, two side faces of the guide groove 240 are arc-shaped curved faces, and straight lines at two ends of each arc-shaped curved face are intersected with the water flow direction and are not perpendicular to the water flow direction, so that when water flows pass through the guide groove 240 from the outer side of the circular ring portion 210, acting force can be generated on the side wall of the guide groove 240, and the impeller 200 is further driven to rotate.

The direction of the water flow is changed by the spiral curved blades 230 and the guide grooves, so that the impeller 200 is driven to rotate under the condition of extremely low axial water flow, and the metering sensitivity of the impeller assembly is improved.

Preferably, the number of the guide grooves 240 is set to 4, which is beneficial to improving the accuracy of the measurement of the impeller assembly, and can also improve the rigidity of the impeller 200 and prolong the service life.

The pivot portion 220 is hollow columnar structure, and the center pin 250 of impeller 200 wears to locate in pivot portion 220, and both ends rotate with the bearing of installing on fore-stock 110 and back supporter 120 respectively and be connected, through fore-stock 110 and back supporter 120 of coaxial coupling respectively in the both sides of impeller 200 to improve impeller assembly's concentricity, thereby guarantee the accuracy nature and the reducing wear of measurement, extension impeller assembly's life.

Preferably, two end surfaces of the guide groove 240 are respectively on the same plane with the end surface of the adjacent circular portion 210.

In specific implementation, as shown in fig. 3, two end surfaces of the guide groove 240 are respectively on the same plane with the end surface of the adjacent circular ring portion 210, on one hand, the length of the side wall of the guide groove 240 in the axial direction is maximized, so that the guide groove 240 on the impeller 200 can receive the impact of the water flow as much as possible, and the metering accuracy is further improved; another aspect is to facilitate the machining of the impeller 200, i.e. the formation of the guide grooves 240 directly outside the circumference of the ring portion 210 by a milling process.

Preferably, the bearing is made of ruby, and the ruby has the advantages of small friction number, high hardness, corrosion resistance, small thermal expansion coefficient and high compressive strength, so that the use requirement of the bearing of the instrument can be met, and the service life of the impeller assembly is further prolonged.

In one embodiment, the front support 110 and the rear support 120 are both ring-shaped structures, and the bearing portion 130 for mounting a bearing is disposed at the inner center of the ring-shaped structures, the ring-shaped structures are connected with the bearing portion 130 through a plurality of support plates 140 distributed along the radial direction, and a water passing path is formed between the support plates 140.

During specific implementation, the outer diameter of each of the front support body 110 and the rear support body 120 is matched with the inner diameter of an installed pipeline, so that the impeller assembly can be conveniently installed and fixed in a water pipe, a bearing portion for installing a bearing is arranged in the center of the inside of each of the annular structure bodies, the annular structure bodies are connected with the bearing portions 130 through a plurality of support plates 140 distributed along the radial direction, the number of the support plates 140 is 3, a water passing passage is formed between the support plates 140, the blocking effect on water flow is reduced while the front support body 110 and the rear support body 120 are improved, and the influence on metering precision is avoided.

Referring to fig. 6, in an embodiment, an end of the bearing portion 130 of the rear support 120 away from the bearing is configured as a bullet-shaped tip, which further reduces resistance of the rear support 120 to water flow, so that water flow is smoother.

In an embodiment, the axial end surface of the circular ring portion 210 is symmetrically provided with grooves 211 for placing magnetic steel, when water flows through the impeller assembly, the impeller 200 is driven to rotate, so as to drive the magnetic steel to rotate to generate a changing magnetic field, and the hall element is used for detecting the change of the magnetic field to obtain water flow parameters.

In one embodiment, the magnetic steel in the slot 211 forms a closed structure by encapsulation, so as to prevent the magnetic steel from being released from the slot 211 when the impeller 200 rotates.

The utility model also provides an embodiment of the flowmeter, which adopts the impeller assembly as described above, the impeller assembly comprises the front support 110, the impeller 200 and the rear support 120 which are coaxially connected in sequence, the rotation concentricity of the impeller 200 can be improved, the service life is prolonged, meanwhile, the inner side of the circular ring part 210 of the impeller 200 is provided with the spiral curved surface blade 230, the outer side of the circumference is also provided with the guide groove 240, so that the impeller 200 can be driven to rotate under the condition of extremely low axial water flow, and the metering sensitivity of the flowmeter is improved.

In summary, compared with the prior art, the impeller assembly provided by the utility model is composed of the front support body, the impeller and the rear support body which are coaxially connected in sequence, so that the rotation concentricity of the impeller can be improved, and the service life is prolonged; the inner side and the outer side of the circumference of the circular ring part of the impeller are respectively provided with a spiral curved surface blade and a guide groove, so that the impeller can be driven to rotate under the condition of extremely low axial water flow so as to further improve the metering sensitivity.

In addition, it will be appreciated by those skilled in the art that, although there may be many problems with the prior art, each embodiment or aspect of the present invention may be improved only in one or several respects, without necessarily simultaneously solving all the technical problems listed in the prior art or in the background. It will be understood by those skilled in the art that nothing in a claim should be taken as a limitation on that claim.

Although terms such as front support, rear support, bearing portion, support plate, impeller, circular ring portion, groove portion, rotation shaft portion, helical curved blade, guide groove, center shaft, etc. are used more often herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention; the terms "first," "second," and the like in the description and in the claims, and in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An impeller assembly, characterized by: comprises a front support body (110), an impeller (200) and a rear support body (120) which are coaxially connected in sequence along the water flow direction;

the impeller (200) comprises a circular ring part (210) and a rotating shaft part (220) positioned in the center of the inside of the circular ring part (210), and the circular ring part (210) and the rotating shaft part (220) are connected through a plurality of spiral curved surface blades (230) distributed along the radial direction;

guide grooves (240) are further arranged on the outer side of the circumference of the circular ring part (210) at intervals, two side faces of each guide groove (240) are arc-shaped curved faces, and straight lines at two ends of each arc-shaped curved face are intersected with the water flow direction and are not perpendicular to the water flow direction;

the central shaft (250) of the impeller (200) penetrates through the rotating shaft part (220), and two ends of the central shaft are respectively connected with bearings arranged on the front supporting body (110) and the rear supporting body (120) in a rotating mode.

2. The impeller assembly of claim 1, wherein: two end faces of the guide groove (240) are respectively on the same plane with the end face of the circular ring part (210) close to the guide groove.

3. The impeller assembly of claim 1, wherein: the number of the guide grooves (240) is 4.

4. The impeller assembly of claim 1, wherein: the number of the spiral curved surface blades (230) is 2, and the spiral curved surface blades are arranged in a centrosymmetric manner.

5. The impeller assembly of claim 1, wherein: the bearing is made of ruby.

6. The impeller assembly of claim 1, wherein: the front support body (110) and the rear support body (120) are both annular structural bodies, a bearing portion (130) for mounting a bearing is arranged in the center of the front support body and the rear support body, the annular structural bodies are connected with the bearing portion (130) through a plurality of support plates (140) distributed along the radial direction, and a water passing channel is formed between the support plates (140).

7. The impeller assembly of claim 6, wherein: one end, far away from the bearing, of the bearing part (130) on the rear supporting body (120) is arranged to be a tip.

8. The impeller assembly of claim 1, wherein: the axial end face of the circular ring part (210) is symmetrically provided with groove bodies (211) for placing magnetic steel.

9. The impeller assembly of claim 8, wherein: the magnetic steel in the groove body (211) forms a closed structure through encapsulation.

10. A flow meter, characterized by: use of an impeller assembly according to any one of claims 1 to 9.