CN212539283U - Shaftless magnetic suspension turbine meter body assembly, meter core assembly and flowmeter - Google Patents

Abstract

The utility model relates to a shaftless magnetic suspension turbine meter body component, which comprises a meter body, wherein the meter body is provided with a flow passage, and a meter body permanent magnet is arranged in the flow passage; the sleeve is inserted into the runner, and a sleeve permanent magnet is arranged at the end part of the sleeve inserted into the runner; and a turbine is positioned between the sleeve permanent magnet and the meter body permanent magnet in the flow channel, the central axis of the turbine is parallel to the central axis of the flow channel, the blades of the turbine are provided with inner magnets, and the magnetic poles of the inner magnets and the magnetic poles of the outer magnets are oppositely arranged to suspend the turbine between the sleeve permanent magnet and the meter body permanent magnet. The utility model also discloses a watch core sub-assembly and shaftless magnetic suspension turbine flowmeter. The utility model discloses utilize magnetic suspension structure to replace the bearing support structure of current turbine, the entity axis of rotation has been removed to the turbine for the internal space increase of table, the measured fluid unit interval pass rate is high, and the pressure loss is little.

Description

Shaftless magnetic suspension turbine meter body assembly, meter core assembly and flowmeter

Technical Field

The utility model relates to a fluid measuring equipment belongs to measurement apparatus technical field. In particular to a shaftless magnetic suspension turbine meter body component; and simultaneously, the utility model discloses still based on this shaftless magnetic suspension turbine meter body subassembly, disclose a watch core sub-assembly and shaftless magnetic suspension turbine flowmeter.

Background

The flowmeter is known by its english name flowmeter, which is defined by the national committee for the examination and determination of scientific and technical terms as: meters that indicate the measured flow rate and/or the total amount of fluid in a selected time interval. Simply a meter for measuring the flow of fluid in a pipe or open channel. The flow meters are further classified into vane wheel flow meters, differential pressure flow meters, rotor flow meters, throttle flow meters, slit flow meters, volumetric flow meters, electromagnetic flow meters, ultrasonic flow meters, and the like. The liquid flow meter and the gas flow meter are classified according to media.

The turbine flowmeter is one of the impeller flow (flow velocity) meters, has the advantages of mature technology, simple structure, good repeatability, higher measurement precision, wide working range and the like, and is widely applied to the measurement of fluids such as petroleum, liquefied gas, natural gas and the like. Basic working principle of the turbine flowmeter: when the fluid flows into the flowmeter, the fluid is rectified and accelerated under the action of the inlet rectifier, and the turbine generates a rotation torque because the turbine blades form a certain angle with the flow direction of the fluid, and the turbine starts to rotate after the friction torque and the fluid resistance torque are overcome. In a certain flow range, the rotating angular speed of the turbine is in direct proportion to the volume flow of the fluid, the angular speed of the turbine is read by a sensor and converted into a corresponding electric signal to be transmitted to a control display component of the instrument, the electric signal is amplified, filtered and shaped and then is sent to a flow calculation microprocessor together with signals of a temperature sensor and a pressure sensor to be subjected to operation processing, and the obtained volume flow and total flow of the fluid are displayed on a display screen.

When the turbine rotates, an electric pulse with a frequency f proportional to the turbine speed is generated by the turbine speed sensor, namely proportional to the flow Q. The electric pulse signal is amplified by a preamplifier and then sent to a microprocessor, wherein the relation between the measured flow Q and the pulse frequency f is as follows: f = KQ, where K is a constant of proportionality, so that the microprocessor can determine the instantaneous flow rate of the fluid flowing through and the accumulated flow rate in a certain period of time by the number of pulses.

Although the traditional turbine flowmeter has numerous advantages and wide application, the traditional turbine flowmeter has some inherent defects, mainly: 1. the traditional turbine flowmeter is characterized in that a turbine is supported by a bearing, the turbine bearing has friction force, the measurement accuracy of the flowmeter is influenced, the initial flow rate is high, the range ratio is small (1: 20), 2, the traditional turbine flowmeter is supported by the bearing, the turbine bearing occupies a gas circulation space, a high back pressure ratio is caused, the gas passing rate is low, 3, the bearing is easy to wear and age under the condition that the measured fluid contains solid impurities, 4, lubricating oil needs to be filled into the bearing periodically, and the use and maintenance cost is increased.

Based on the defects, the turbine flowmeter in the prior art has the problems of poor stability, low accuracy, small range ratio, large initial flow, large pressure loss, low passing rate of the measured fluid, high maintenance cost and the like, so that improvement and innovation on the turbine flowmeter in the prior art are urgently needed.

SUMMERY OF THE UTILITY MODEL

Based on above technical problem, the utility model provides a shaftless magnetic suspension turbine meter body subassembly to solved among the prior art turbine flowmeter poor stability, range than little, the pick-up flow is big, by the technical problem that the fluid through-point is low.

For solving the above technical problem, the utility model discloses a technical scheme as follows:

a shaftless magnetic suspension turbine meter body assembly comprises a meter body, wherein the meter body is provided with a flow passage penetrating through the meter body, and a meter body permanent magnet is arranged in the flow passage; the sleeve is inserted into the end part of the flow passage, and a sleeve permanent magnet is arranged at the end part of the flow passage, and is matched with the meter body permanent magnet to form an outer magnet; and a turbine is positioned between the sleeve permanent magnet and the meter body permanent magnet in the flow channel, the central axis of the turbine is parallel to the central axis of the flow channel, the blades of the turbine are provided with inner magnets, and the magnetic poles of the inner magnets and the magnetic poles of the outer magnets are oppositely arranged to suspend the turbine between the sleeve permanent magnet and the meter body permanent magnet.

Preferably, the sleeve permanent magnet and the surface permanent magnet are both arc-shaped structures on the sides facing the turbine, and are closely attached and then paired to form the outer magnet with the semi-arc-shaped groove.

Preferably, one side of the inner magnet facing the outer magnet forms an arc surface with the same radian as the semi-arc-shaped groove.

Preferably, the inner magnet comprises a first turbine permanent magnet and a second turbine permanent magnet which are arranged side by side at intervals, and the cross sections of the first turbine permanent magnet and the second turbine permanent magnet are different in size.

Preferably, the sleeve comprises a cylindrical part matched with the flow passage shaft hole and a flange part matched and fixed with the meter body port.

Preferably, a non-contact turbine speed sensor is further arranged on the meter body, and a probe of the non-contact turbine speed sensor penetrates through the meter body and the outer magnet and is arranged opposite to the circumferential surface of the turbine at an interval.

Preferably, the meter body permanent magnet, the sleeve permanent magnet and the inner magnet are arranged in a welding, bonding or embedding manner.

Preferably, the turbine is made of a light composite material.

Compared with the prior art, the beneficial effects of the utility model are as follows:

1. this subassembly utilizes the bearing structure of magnetic suspension structure replacement current turbine, and the entity axis of rotation has been removed to the turbine for table body inner space increases, and the measured fluid passage rate per unit time is high, and the pressure loss is little.

2. The assembly adopts a magnetic suspension structure, the turbine is suspended and borne, the friction force on the turbine fixing assembly (such as a bearing and a bearing seat) is eliminated, the assembly has better mechanical and mechanical characteristics, the structure is simple, the stability and the accuracy of the turbine rotation are improved, the initial flow is low, the range ratio is large, and the dynamic working reliability and the accuracy are higher.

4. The turbine of the assembly adopts a magnetic suspension structure, the turbine is small in abrasion, lubricating oil does not need to be added, the maintenance period is long, the cost is low, and the service life is prolonged.

5. The turbine is positioned by the aid of the insertion mode of the sleeve and the meter body, the turbine is convenient to assemble and disassemble, and the requirement for air tightness of the meter body can be met.

6. The first turbine permanent magnet and the second turbine permanent magnet in the assembly adopt a design mode that the cross sections are different in size, so that the turbine can be more stable when being impacted by fluid in the meter body, the dynamic pressure generated by the fluid on the turbine is more balanced, and the turbine rotates stably and uniformly.

And simultaneously, the utility model discloses based on above-mentioned shaftless magnetic suspension turbine table body subassembly provides a watch core sub-assembly, and this watch core sub-assembly includes foretell shaftless magnetic suspension turbine table body subassembly, is provided with preceding rectifier in the sleeve, is provided with back rectifier in the runner.

The watch core assembly of the utility model has all the technical effects of the shaftless magnetic suspension turbine watch body assembly, and the description is not repeated here.

Finally, the utility model discloses still based on above-mentioned shaftless magnetic suspension turbine table body subassembly or table core sub-assembly, provide a shaftless magnetic suspension turbine flowmeter, this flowmeter includes foretell shaftless magnetic suspension turbine table body subassembly or foretell table core sub-assembly, and the table body external connection of shaftless magnetic suspension turbine table body subassembly or table core sub-assembly has the measurement control display module.

The utility model discloses a shaftless magnetic suspension turbine flowmeter has all technological effects of above-mentioned shaftless magnetic suspension turbine meter body subassembly, and here no longer states tiredly.

Drawings

FIG. 1 is an exploded view of a shaftless maglev turbine meter body assembly, with part of the structure not shown;

FIG. 2 is a first assembly view of the shaftless maglev turbine meter body assembly, with portions of the structure not shown;

FIG. 3 is a second assembly view of the shaftless maglev turbine meter body assembly;

FIG. 4 is a schematic view of the structure of a turbine;

FIG. 5 is an assembly view of the watch movement assembly, with portions of the structure not shown;

FIG. 6 is an exploded view of the watch movement assembly, with portions of the structure not shown;

FIG. 7 is a schematic structural diagram of a shaftless magnetic levitation turbine flowmeter;

the symbols in the figures are respectively represented as: 1. a sleeve; 2. a flange portion; 3. a cylindrical portion; 4. a sleeve permanent magnet; 5. an inner magnet; 6. a turbine; 7. a meter body permanent magnet; 8. a watch body; 9. a flow channel; 10. mounting holes; 11. a temperature pressure sensor mounting hole; 12. a first turbine permanent magnet; 13. a second turbine permanent magnet; 14. a front rectifier; 15. a rear rectifier; 16. and a measurement control display module.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

In the description of the present invention, it should be understood that the terms "one end", "the other end", "both ends", "between", "middle part", "lower part", "upper end", "lower end", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The shaftless magnetic levitation turbine meter body assembly as shown in fig. 1-5 comprises at least one meter body 8, and the meter body 8 can be made of stainless steel welding or metal (carbon steel, alloy steel, cast iron and the like) casting, so that the strength and the cost are guaranteed, and the manufacturing and installation are convenient. The structure of the watch body 8 is a structure in the prior art, such as the prior art: the two ends of the cylinder structure are provided with connecting flange plates, a circular hole is formed in the cylinder to form a fluid flow channel, and the flow channel penetrates through the cylinder, namely the meter body. Specifically, in the runner 9 of the watch body 8, a watch body permanent magnet 7 is further arranged, the watch body permanent magnet 7 has magnetism and can be made of permanent magnet materials such as neodymium iron boron, samarium cobalt, aluminum nickel cobalt and ferrite, and the watch body permanent magnet 7 can be arranged in the runner 9 in a welding, bonding or embedding mode.

As the utility model discloses a big core structure, this table body subassembly still including a sleeve 1, this sleeve 1 at least include one with runner complex drum structure, sleeve 1 can insert in the runner 9 of above-mentioned table body subassembly, form shaft hole cooperation structure, for guaranteeing the cooperation precision, sleeve 1 external diameter is equal to or is greater than runner 9 internal diameter slightly better, also the two interference fit or transition fit, sleeve 1 can be made by stainless steel welding or metal (carbon steel, alloy steel, cast iron etc.) casting. Specifically, a sleeve permanent magnet 4 is further arranged at one end of the sleeve 1 inserted into the flow channel 9, the sleeve permanent magnet 4 also has magnetism, and the material and arrangement mode of the sleeve permanent magnet 4 can be the same as or similar to those of the watch body permanent magnet 7, which will not be described in detail herein.

On the basis of the structure, after the sleeve 1 is inserted into the watch body 8, the sleeve permanent magnet 4 and the watch body permanent magnet 7 are matched with each other to form a complete outer magnet, and the outer magnet is used as one of magnetic suspension assemblies of the watch body assembly and is mainly used for supporting and positioning.

It is necessary that a turbine 6 is further positioned inside the outer magnet in the flow channel 9, that is, between the sleeve permanent magnet 4 and the meter body permanent magnet 7, the rotating shaft of the turbine 6 is removed, as a specific structure, the turbine 6 can only retain the blade(s) and the wheel body connected with the blade(s), the central axis of the turbine 6 is arranged parallel to the central axis of the flow channel 9 after installation, in order to ensure the balance and the rotational stability of the operation of the turbine 6, it is better to ensure that the central axis of the turbine 6 is arranged coaxially with the central axis of the flow channel 9 after installation, wherein the blades of the turbine 6 are all provided with inner magnets 5, the materials and arrangement modes of the inner magnets 5 can be referred to the sleeve permanent magnet 4 or the meter body permanent magnet 7, and it is not mentioned here again that the inner magnets and the outer magnets are arranged in a mode of opposite magnetic poles, that is the opposite magnetic poles on the two opposite sides, the device is mainly used for being matched with an outer magnet so as to suspend and bear the turbine 6 under the support and positioning of the outer magnet, and the turbine 6 is installed in the watch body assembly under the action of no rotating shaft and no bearing.

The meter body assembly structure is combined, assembly and disassembly are very convenient, the turbine 6 is placed in the flow channel 9 in advance and located on one side of the meter body permanent magnet 7, then the sleeve 1 is inserted into the flow channel 9, the turbine 6 is located between the sleeve permanent magnet 4 and the meter body permanent magnet 7 to complete installation, the turbine 6 can be suspended and located in the flow channel 9 under the action of an external magnet after installation, the sleeve 1 and the meter body 8 can be sealed by using sealing structures (sealing rings, sealing discs, sealing glue and the like as necessary to ensure integral air tightness of the meter body, when disassembly is needed, the sleeve 1 is disassembled from the flow channel 9 by using a tool, the turbine 6 is located by using the sleeve structure, the integral structure of the meter body is simplified, the volume and the consumption of the meter body are reduced, and cost is reduced.

Meanwhile, the rotating shaft structure and the fixing components (bearings, bearing seats and the like) of the existing turbine 6 are removed from the meter body assembly structure, more inner spaces of the flow channel 9 are reserved while the meter body structure is simplified, so that the fluid passing rate in the flow channel 9 is high, the pressure loss is small, the turbine 6 is integrally suspended and positioned in the flow channel 9 by utilizing the magnetic force action of the outer magnet and the inner magnet, the turbine 6 is not integrally contacted with the meter body 8 or the sleeve 1, the abrasion of the turbine 6 is reduced, lubricating oil is not required to be added, the maintenance period is long, the cost is low, the service life is prolonged, the friction force and partial resistance on the conventional turbine bearing can be eliminated, the stability and the accuracy of the turbine rotation are improved, the initial flow rate is low, the range ratio is large, the range ratio can reach about 1:100, and the dynamic.

In the above-mentioned table body subassembly, sleeve permanent magnet 4, table body permanent magnet 7 all adopt annular structure best, and sleeve permanent magnet 4 is the annular setting promptly and forms round magnet structure at sleeve 1 tip, and table body permanent magnet 7 is the annular and sets up the round along runner 9 inner wall circumferencial direction, and the two all can adopt whole magnetic ring to set up, also can form by a plurality of magnetic stripes, magnetic path concatenation.

Among the above-mentioned table body subassembly, one side that sleeve permanent magnet 4 and table body permanent magnet 7 face turbine 6 is the arc structure, and the two is mated and is formed the outer magnet of taking half arc recess after closely laminating, and outer magnet half arc recess can be with the fine location of turbine 6 between outer magnet, and turbine 6 displacement is little around the during operation, and the equilibrium is better. Specifically, the radian and the arc length of the sleeve permanent magnet and the arc length of one side of the meter body permanent magnet 7 facing the turbine 6 are the same, so that the two arc surfaces can be spliced into a complete semi-arc groove after being attached, the attachment degree and the streamline design of the two can be ensured, and the stability and the smoothness of the fluid of the internal turbine 6 are ensured.

In the meter body assembly, one side of the inner magnet facing the outer magnet forms an arc surface with the same radian as the semi-arc-shaped groove. The cambered surface of one side of the inner magnet facing the outer magnet is designed, so that the circumference of the turbine 6 and the semi-cambered grooves of the outer magnet form a concave-convex structure, fluid flowing through the circumference of the turbine 6 is more uniform, turbulence or turbulent flow cannot be generated, and the stability and the efficiency of the turbine 6 can be further improved.

As a big core structure of table body subassembly, interior magnet can be by the first turbine permanent magnet 12 and the second turbine permanent magnet 13 two parts that the interval set up side by side and constitute, and the two is located and is set up side by side on the blade of turbine 6 to receive outer magnet magnetic force effect down turbine 6 atress around, can be better stable turbine 6, guarantee that turbine 6 is steady. Further, the cross sections of the first turbine permanent magnet 12 and the second turbine permanent magnet 13 are different in size and are asymmetric, that is, the cross sections of the first turbine permanent magnet 12 and the second turbine permanent magnet 13 are different in size, so that a large asymmetric structure and a small asymmetric structure are formed, when fluid passes through the turbine 6, it will cause a certain impact force to the turbine 6, will cause the turbine 6 to tilt, rock, bump, etc., will affect the subsequent use of the watch body assembly, therefore, the first turbine permanent magnet 12 and the second turbine permanent magnet 13 are designed to have a large and small structure, the smaller cross section is placed on the inlet end side of the flow passage 9, the larger cross section is placed on the outlet end side of the flow passage 9, when the fluid impacts the turbine 6, the rear side of the turbine 6, namely the turbine permanent magnet with a large cross-sectional area, has large magnetic force, so that the whole bearing capacity of the turbine 6 is increased, and the impact resistance of the turbine 6 is high. Furthermore, the first turbine permanent magnet 12 and the second turbine permanent magnet 13 are respectively located on the inner sides of the sleeve permanent magnet 4 and the meter body permanent magnet 7, so that the turbine 6 can be always located in the middle of the inner side of the outer magnet under the action of the magnetic force of the magnetic suspension assembly, and the flow measurement accuracy is improved.

In order to further increase the assembling and disassembling convenience of the sleeve 4, the sleeve 4 comprises a cylindrical part 3 matched with a shaft hole of the flow passage 9 and a flange part 2 matched and fixed with a port of the meter body 8, the cylindrical part 3 is integrally cylindrical and is used for being inserted into the flow passage 9 to form shaft hole matching, the flange part 2 can be used for being matched with the port of the meter body 8, the flange part 2 can be integrally disc-shaped and can be provided with a through hole and a threaded hole, a corresponding bearing hole is arranged at the corresponding port of the meter body 8, the flange part 2 is fixedly connected with the meter body 8 through bolts and screws, if necessary, a sealing groove can be arranged at the end part of the flange part 2 or the meter body 8, and a sealing piece is arranged in the sealing groove to enhance the.

In order to facilitate flow measurement, a non-contact turbine speed sensor is further arranged on the meter body, and a probe of the non-contact turbine speed sensor penetrates through the meter body 8 and the outer magnet and is arranged opposite to the circumferential surface of the turbine 6 at an interval. When fluid passes through turbine 6 and drives turbine 6 and rotate, detect the turbine 6 rotational speed through non-contact turbine speed sensor and can obtain the flow value of being surveyed, flow measurement is convenient accurate. The non-contact turbine speed sensor can adopt an electromagnetic coupling sensor or a photoelectric coupling sensor; the electromagnetic coupling has low requirement on the cleanliness of a measured fluid, the measurement precision has small accumulated change along with time, the defects of the electromagnetic coupling are that the electromagnetic coupling is easy to be subjected to electromagnetic interference, the electromagnetic coupling is sensitive to the electromagnetic environment of a use environment, the processing technology is complex, the cost is high, the photoelectric coupling is suitable for being used under the conditions of no electromagnetic environment and low fluid medium purity, the photoelectric coupling has strong electromagnetic interference resistance and low manufacturing cost, the defects of the photoelectric coupling are that the requirement on the cleanliness of the measured gas is high, the measurement precision can change along with the accumulation of time, the photoelectric coupling is suitable for being used under the conditions of the electromagnetic environment and high fluid medium purity, and the photoelectric coupling can be selected according to specific conditions. Specifically, a mounting hole 10 may be provided on the meter body 8 along the radial direction of the meter body 8 for mounting a non-contact turbine speed sensor or a probe of the non-contact turbine speed sensor, a through hole communicating with the flow channel is provided at the bottom of the mounting hole, and an outlet of the through hole is preferably located in the middle between the sleeve permanent magnet and the meter body permanent magnet, so that the non-contact turbine speed sensor can measure the flow rate.

In order to improve the response speed and stability of the turbine 6 and reduce the vibration and weight of the turbine 6, the turbine 6 is preferably made of a light composite material, the light composite material can be silicon carbide, silicon nitride, magnesium oxide, aluminum silicate and the like, the turbine has the advantages of good corrosion resistance, good impact resistance, good high and low temperature resistance, good oxidation resistance and the like, the weight of the turbine 6 can be greatly reduced, the dynamic pressure loss of fluid can be reduced, the efficient coupling of the turbine 6 and the fluid can be ensured, the turbine 6 can be instantaneously stopped along with the flowing of the fluid or the stopping of the fluid, the response speed is high, and the precision is high.

As shown in fig. 6, the utility model also discloses a watch core sub-assembly, and is concrete, this watch core sub-assembly include foretell shaftless magnetic suspension turbine table body subassembly, in shaftless magnetic suspension turbine table body subassembly, be provided with front rectifier 14 in the sleeve 1, be provided with back rectifier 15 in the runner 9.

The meter core assembly is used as a core component of the flowmeter, fluid is rectified through a front rectifier 14 and a rear rectifier 15 of the meter core assembly to form stable and uniform-speed measured fluid, namely, the measured fluid can be measured through the meter core assembly, when the meter core assembly is used specifically, one end of the sleeve 1 can be used as a fluid inlet and can also be used as a fluid outlet, and the position is not limited, and the front rectifier 14 and the rear rectifier 15 can adopt rectifiers with the same type, such as a pipeline rectifier, so that the front rectifying amplitude and the rear rectifying amplitude are the same.

The utility model discloses a watch core sub-assembly owing to adopted shaftless magnetic suspension turbine meter body subassembly, its all advantages that have shaftless magnetic suspension turbine meter body subassembly have that the fluid is through rate height, the pressure loss is little, stability and accurate nature are high, the inception flow is low, the range is than beneficial effect such as big.

Finally, as shown in fig. 7, the utility model also discloses a shaftless magnetic suspension turbine flowmeter, and is concrete, the foretell shaftless magnetic suspension turbine meter body subassembly of this shafting magnetic suspension turbine flowmeter or foretell watch core sub-assembly, the table external connection of shaftless magnetic suspension turbine meter body subassembly or watch core sub-assembly has measurement control display module 16.

The utility model discloses a shaftless magnetic suspension turbine flowmeter utilizes shaftless magnetic suspension turbine meter body subassembly or watch core sub-assembly as fluid carrier and measuring end, measures control display module 16 and shows the end as measuring, has all beneficial effects of shaftless magnetic suspension turbine meter body subassembly or watch core sub-assembly, specifically no longer states by force. The functions of the measurement control display module 16 include a measurement control module, a display module, a processing module, a communication module, etc., and since the measurement control display module 16 belongs to the conventional technology, the description thereof is omitted.

Specifically, as required, still can set up other equipment in the shaftless magnetic suspension turbine flowmeter and be used for increasing other functional demands, if set up temperature pressure sensor mounting hole 11 on the table body, this temperature pressure sensor mounting hole 11 and runner 9 intercommunication can set up temperature pressure sensor in the temperature pressure sensor mounting hole 11, temperature pressure sensor detects control and data transmission through being connected with measurement control display module 16, can be used to simultaneously measure fluid temperature and pressure, and the usable prior art of this part content realizes, the utility model discloses also not mention again.

The above is the embodiment of the present invention. The utility model discloses not limited to above-mentioned embodiment, anybody should learn the structural change who makes under the enlightenment of the utility model, all with the utility model discloses have the same or close technical scheme, all fall into the utility model discloses an within the protection scope.

Claims (10)

1. A shaftless magnetic suspension turbine meter body assembly comprises a meter body, wherein the meter body is provided with a flow passage penetrating through the meter body, and is characterized in that a meter body permanent magnet is arranged in the flow passage;

the sleeve is inserted into the end part of the flow passage, and a sleeve permanent magnet is arranged at the end part of the flow passage, and is matched with the meter body permanent magnet to form an outer magnet;

and a turbine is positioned between the sleeve permanent magnet and the meter body permanent magnet in the flow channel, the central axis of the turbine is parallel to the central axis of the flow channel, the blades of the turbine are provided with inner magnets, and the magnetic poles of the inner magnets and the magnetic poles of the outer magnets are oppositely arranged to suspend the turbine between the sleeve permanent magnet and the meter body permanent magnet.

2. The shaftless magnetic suspension turbine meter body assembly of claim 1, wherein the sides of the sleeve permanent magnet and the meter body permanent magnet facing the turbine are both arc-shaped structures, and the sleeve permanent magnet and the meter body permanent magnet are closely attached and matched to form the outer magnet with a semi-arc-shaped groove.

3. The shaftless magnetic levitation turbine meter body assembly as claimed in claim 2, wherein the side of the inner magnet facing the outer magnet is formed into an arc with the same arc as the semi-arc groove.

4. The shaftless magnetic levitation turbine meter body assembly as recited in claim 1, wherein the inner magnet comprises a first turbine permanent magnet and a second turbine permanent magnet which are arranged side by side at intervals, and the cross sections of the first turbine permanent magnet and the second turbine permanent magnet are different in size.

5. The shaftless magnetic levitation turbine meter body assembly as recited in claim 1, wherein the sleeve comprises a cylindrical portion fitted to the runner shaft bore and a flange portion to be mated and fixed to the meter body port.

6. The shaftless magnetic levitation turbine meter body assembly according to claim 1, wherein a non-contact turbine speed sensor is further arranged on the meter body, and a probe of the non-contact turbine speed sensor penetrates through the meter body and the outer magnet and is arranged opposite to the circumferential surface of the turbine at a spacing.

7. The shaftless magnetic levitation turbine meter body assembly as claimed in claim 1, wherein the meter body permanent magnet, the sleeve permanent magnet and the inner magnet are arranged by welding, bonding or embedding.

8. The shaftless magnetic levitation turbine meter body assembly as claimed in claim 1, wherein the turbine is made of a light composite material.

9. A watch movement assembly comprising a shaftless maglev turbine meter body assembly according to any one of claims 1 to 8, a front commutator being provided in the sleeve and a rear commutator being provided in the flow channel.

10. A shaftless magnetic suspension turbine flowmeter, comprising a shaftless magnetic suspension turbine meter body assembly according to any one of claims 1 to 8 or a meter core assembly according to claim 9, wherein a measurement control display module is connected outside the meter body.

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