CN216617915U - Magnetic drive self-priming peripheral pump - Google Patents

Abstract

The utility model relates to a self-priming vortex pump, in particular to a magnetic drive self-priming vortex pump.A pump cover is fixedly connected with the front end of a shell to form an annular flow channel together, and a motor is fixedly connected with the rear end of the shell; the pump shaft is fixed in the shell through a chuck, the impeller is in key fit with the front end of the pump shaft and is positioned in the annular flow channel, the inner rotor is fixed at the rear end of the pump shaft, the outer rotor is in key fit with the motor, and the isolation sleeve is arranged between the inner rotor and the outer rotor and is fixed on the shell; the shell is provided with a liquid inlet and a liquid outlet section which are communicated with the annular flow passage, and the liquid outlet section comprises a gas-liquid separation chamber communicated with the annular flow passage, a reflux port communicated with the gas-liquid separation chamber and the annular flow passage, and a liquid outlet arranged on the gas-liquid separation chamber; the lower end of the impeller is provided with a liquid storage area formed by the shell and the pump cover together. Compared with the prior art, the utility model adopts magnetic drive to realize the conversion of the shaft seal of the self-priming vortex pump from dynamic seal to static seal, and effectively solves the phenomena of running, overflowing, dripping, leaking and the like.

Description

Magnetic drive self-priming peripheral pump

Technical Field

The utility model relates to a self-priming peripheral pump, in particular to a magnetic drive self-priming peripheral pump.

Background

The vortex pump is mainly composed of an impeller, a pump body, a pump cover and an annular flow passage formed by the impeller, the pump body and the pump cover, wherein the impeller of the vortex pump is different from the impeller of the centrifugal pump and is a disc with radial blades on an outer wheel. The liquid enters the flow passage through the suction pipe, repeatedly makes vortex motion in the vanes and the flow passage of the pump body, obtains energy through the rotating impeller, and is conveyed to the discharge pipe to complete the working process of the pump. The specific number of revolutions of the peripheral pump is generally between 6 and 50. The pump is a pump with small flow and high lift, and is suitable for conveying liquid or gas-liquid mixture with viscosity not greater than 5 DEG E, no solid particles and no impurities. The flow rate range is 0.18-45m³And the single-stage lift can reach about 250 m. The vortex pump is generally applied to the petroleum and chemical industry departments, particularly to the aspects of chemical fibers, medicines, fertilizers, small boiler water supply and the like.

The shaft seal of the existing self-priming vortex pump adopts dynamic seal mechanical seal or packing seal, and the phenomena of running, overflowing, dripping, leaking and the like can be generated in the mode, so that the existing self-priming vortex pump cannot or is difficult to be suitable for conveying flammable, explosive, harmful, toxic and rare precious liquids, and needs to be improved.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve at least one of the problems, and provides a magnetic-driven self-priming volute pump, which realizes that the shaft seal of the self-priming volute pump is converted from dynamic seal to static seal by adopting magnetic drive, effectively solves the phenomena of running, overflowing, dripping, leakage and the like, enables the magnetic-driven self-priming volute pump to be suitable for conveying flammable and explosive, harmful and toxic and rare precious liquids, and widens the application range.

The purpose of the utility model is realized by the following technical scheme:

a magnetic drive self-priming vortex pump comprises a shell, wherein a pump cover is fixedly connected to the front end of the shell to form an annular flow passage together, and a motor is fixedly connected to the rear end of the shell;

the inner part of the shell comprises a pump shaft fixed in the shell through a chuck, an impeller which is in key fit with the front end of the pump shaft and is positioned in the annular flow channel, an inner rotor fixed at the rear end of the pump shaft, an outer rotor in key fit with the motor and an isolation sleeve which is arranged between the inner rotor and the outer rotor and is fixed on the shell;

the shell is provided with a liquid inlet and a liquid outlet section which are communicated with the annular flow passage, and the liquid outlet section comprises a gas-liquid separation chamber communicated with the annular flow passage, a reflux port communicated with the gas-liquid separation chamber and the annular flow passage, and a liquid outlet arranged on the gas-liquid separation chamber; the lower end of the impeller is provided with a liquid storage area formed by the shell and the pump cover together;

the motor drives the outer rotor to rotate, and magnetic field force generated by the outer rotor pushes and pulls the inner rotor to rotate so as to drive the pump shaft and the impeller to synchronously rotate (magnetic drive); the air sucked from the liquid inlet is mixed with the liquid stored in the liquid storage area, the gas-liquid mixture is conveyed to the gas-liquid separation chamber under the rotation of the impeller, the air leaves from the liquid outlet, the liquid returns to the annular flow passage through the return port until the air is completely discharged (self-priming), and the magnetic force drives the self-priming vortex pump to start normal operation.

The outer rotor and the inner rotor are made of magnetic materials, so that the outer rotor can generate a magnetic field after being driven by a motor to rotate so as to drive the inner rotor to rotate, and static sealing can be realized; meanwhile, the isolation sleeve is made of a non-magnetic material, so that the isolation sleeve is prevented from changing or moving under the action of a magnetic field.

Preferably, 40-56 blades are uniformly arranged on both sides of the impeller along the circumferential direction.

Further preferably, 48 blades are uniformly arranged on both sides of the impeller along the circumferential direction.

Under the action of rotation of the impeller (when the magnetic drive self-priming vortex pump works), the blades symmetrically distributed on two sides of the impeller along the circumferential direction can transmit energy to liquid entering the flow channel, the energy transmission process is carried out through momentum exchange of three-dimensional flow, the energy is repeatedly transmitted in the flow channel of the whole pump for several times to dozens of times, energy is obtained once when the longitudinal vortex passes through the impeller once in the flow channel, and the stored energy can be converted into pressure energy and kinetic energy at the outlet of the pump through repeated superposition, so that the liquid is pumped into the next position.

Preferably, the housing comprises a pump body and a bracket which are fixedly connected; the pump cover is fixedly connected to the front end of the pump body, and an annular flow channel (for liquid to pass through and accumulate energy in) and a liquid storage area (reserved part of liquid in the liquid storage area can realize self-absorption) are formed together; the rear end of the bracket is fixedly connected with the motor; the liquid inlet and the liquid outlet section are both arranged on the pump body; the support supports the isolation sleeve against the rear end of the pump body, so that the isolation sleeve is fixed.

Preferably, sealing gaskets are arranged between the pump cover and the pump body and between the pump body and the isolation sleeve. The sealing gasket is arranged to further improve the sealing performance and prevent the leakage of internal liquid or medium.

Preferably, the pump shaft is sleeved with a pair of bearings, and the bearings are fixed on the chuck through positioning pins. The bearing can support the pump shaft, reduce the friction coefficient in the rotation process of the pump shaft and simultaneously ensure the rotation precision of the pump shaft.

Preferably, the bearing comprises a bearing inner ring sleeved on the outer side of the pump shaft and a bearing outer ring sleeved on the outer side of the bearing inner ring, and the bearing outer ring is fixed on the chuck through a positioning pin. The bearing outer ring and the bearing inner ring are both made of SiC, and are good in wear resistance and corrosion resistance, so that the bearing outer ring and the bearing inner ring can be applied to bearings and rotary sealing, and in addition, the sealing effect and the bearing performance can be further improved due to extra hardness and electric conductivity.

Preferably, a front seat disc, a bearing thrust ring, a shaft sleeve and a rear seat disc are further sleeved on the outer side of the pump shaft, and the shaft sleeve is abutted between the bearings; the bearing thrust rings are provided with a pair and respectively abut against the outer sides of the bearings; the front seat disc and the rear seat disc are respectively abutted to the outer sides of the bearing thrust rings.

Preferably, a plurality of O-shaped rings are further sleeved on the pump shaft and on the inner side of the bearing inner ring. The O-shaped ring can further improve the sealing capability, and meanwhile, the O-shaped ring is used for elastically tensioning the inner ring of the bearing, so that a gap between the SIC bearing inner ring and the shaft is prevented, and the bearing is prevented from being damaged.

Preferably, a liquid flow passage is further arranged in the housing, and the liquid flow passage comprises a flow guide pin fixed on the housing by the chuck, a chuck inner flow passage, a pump shaft inner flow passage and an inner flow passage of the isolation sleeve. Liquid flows into the shell through the flow guide pin arranged at the high-pressure area (the outlet of the magnetic drive self-priming vortex pump), then reaches the pump shaft inner flow channel through the chuck inner flow channel (flows through the intersection of the chuck and the bearing during the process to lubricate the bearing), cools the inside of the pump shaft, then flows into the inner flow channel of the isolating sleeve through the pump shaft inner flow channel, cools the isolating sleeve and the outside of the pump shaft, and finally flows out of the shell through the chuck inner flow channel arranged at the low-pressure area and the flow guide pin. The arrangement of the flow guide pin can enable liquid to flow according to a flow channel designed completely, and the possibility of leakage is effectively reduced.

Preferably, the isolation sleeve is made of carbon fiber reinforced polyetheretherketone material. The carbon fiber reinforced PEEK (polyether ether ketone) has good heat resistance, can be continuously used at an allowable temperature of 250 ℃, and can be manufactured into a thin-wall container with corrosion resistance, impact resistance, wear resistance and pressure resistance. The vortex pump is characterized by small flow and high lift, small power of a driving motor and low pump efficiency, if a terminal isolation sleeve of the magnetic vortex pump is made of metal, the metal isolation sleeve can generate vortex heat in a generated rotating magnetic field, and because the vortex pump is in small-flow conveying, the medium circulation quantity inside the isolation sleeve is very small, the circulation medium can not take away all the vortex heat generated by the isolation sleeve, the temperature inside the pump is gradually raised, so that each part inside the pump can not normally work due to thermal expansion deformation, and if the flow of the circulation medium in the isolation sleeve is increased, the hydraulic loss inside the pump is large, and the flow and the lift of the pump can not reach design parameters; if the isolating sleeve made of the nonmetal carbon fiber reinforced peek is adopted, eddy heat cannot be generated in a rotating magnetic field, and the pump efficiency can be effectively improved. In addition, the carbon fiber reinforced peek isolating sleeve only needs to be subjected to compression molding, so that the machining time is greatly saved, and raw materials are saved.

The working principle of the utility model is as follows:

when the motor is started, the motor drives the outer rotor to rotate, the rotation of the outer rotor forms a magnetic field, magnetic field force passes through the isolation sleeve and directly acts on the inner rotor, the inner rotor further rotates under the action of the magnetic field force, the rotation of the inner rotor drives the pump shaft and the impeller which are fixedly connected to synchronously rotate, and power transmission without direct contact is achieved.

Meanwhile, the rotation of the impeller can suck air in the pipeline into the annular flow channel and mix the air with liquid stored in the liquid storage area to form a gas-liquid mixture, when the gas-liquid mixture rotates to the gas-liquid separation chamber along with the impeller, due to the sudden change of the volume, the air can leave the magnetic force driving self-priming vortex pump from the liquid outlet of the gas-liquid separation chamber, the liquid can flow back into the annular flow channel from the backflow port communicated to the annular flow channel and mix with the air again, after a period of exhaust, the air in the pipeline connected with the liquid inlet is completely discharged to complete self-priming, and then normal work (liquid pumping) is started.

Compared with the prior art, the utility model has the following beneficial effects:

1. through the cooperation of outer rotor, inner rotor and separation sleeve, realized through the magnetic drive rotation, can avoid the dynamic seal that uses in the mechanical transmission process and produce the possibility of revealing to the rotation of inner rotor is passed through the pump shaft and is transmitted the impeller, makes the impeller take place synchronous rotation, realizes the pumping function of volute pump. The dynamic seal in the prior art is replaced by the static seal, and meanwhile, the liquid entering the pump can not leak through the sealing fit of the isolating sleeve and the sealing gasket, so that the problems of leakage, overflow, dripping and leakage are solved, and the pump is further suitable for conveying flammable and explosive, harmful and toxic and rare precious liquids.

2. The vortex pump can complete the self-suction function through the liquid remained in the liquid storage area and the return port communicating the gas-liquid separation chamber and the annular flow channel; and a liquid flow channel is arranged between a high-pressure area and a low-pressure area which are close to the outlet of the annular flow channel, and the liquid flow channel sequentially passes through a chuck, a pump shaft, an isolating sleeve and other parts, so that the cooling of a plurality of parts can be completed, the cooling can be automatically performed under the action of pressure difference after the motor is driven to rotate, an additional external part or device is not needed, and the investment of equipment can be reduced.

3. The isolation sleeve is made of carbon fiber reinforced peek materials, has good heat resistance, corrosion resistance, impact resistance, wear resistance and pressure resistance, and can not generate eddy heat in a magnetic field, so that a large amount of heat can not be generated in the pump due to the action of the magnetic field on the isolation sleeve, and the pump can realize cooling by adopting self small-flow circulation (the liquid flow channel). Meanwhile, the carbon fiber reinforced peek material can be prepared by compression molding, is convenient and simple, can greatly improve the production efficiency, and reduces the material cost.

Drawings

FIG. 1 is a schematic side sectional view of a magnetically driven self-priming volute pump of the present invention;

FIG. 2 is a schematic cross-sectional view (section A-A in FIG. 1) of the magnetically driven self-priming vortex pump of the present invention;

in the figure: 1-pump cover; 2-an impeller; 3-a pump body; 4-a flow guide pin; 5-front seat disc; 6-bearing thrust ring; 7-bearing outer race; 8-shaft sleeve; 9-bearing inner race; 10-a rear seat disc; 11-an inner rotor; 12-a spacer sleeve; 13-an outer rotor; 14-a scaffold; 15-a sealing gasket; 16-O-ring; 17-a pump shaft; 18-round nuts; 19-a motor; 20-a chuck; 21-liquid inlet; 22-a gas-liquid separation chamber; 23-a reflux port; 24-a liquid outlet; 25-liquid storage area.

Detailed Description

The utility model is described in detail below with reference to the figures and specific embodiments.

Example 1

A magnetic force driven self-priming vortex pump is shown in figures 1 and 2 and comprises a shell, wherein the front end of the shell is fixedly connected with a pump cover 1 to form an annular flow channel together, and the rear end of the shell is fixedly connected with a motor 19; the inner part of the shell comprises a pump shaft 17 fixed in the shell through a chuck 20, an impeller 2 in key fit with the front end of the pump shaft 17 and positioned in an annular flow channel, an inner rotor 11 fixed at the rear end of the pump shaft 17, an outer rotor 13 in key fit with a motor 19, and an isolation sleeve 12 arranged between the inner rotor 11 and the outer rotor 13 and fixed on the shell; the shell is provided with a liquid inlet 21 and a liquid outlet section which are communicated with the annular flow passage, and the liquid outlet section comprises a gas-liquid separation chamber 22 communicated with the annular flow passage, a return opening 23 communicated with the gas-liquid separation chamber 22 and the annular flow passage, and a liquid outlet 24 arranged on the gas-liquid separation chamber 22; the lower end of the impeller 2 is provided with a liquid storage area 25 formed by the shell and the pump cover 1 together; the motor 19 drives the outer rotor 13 to rotate, and magnetic field force generated by the outer rotor 13 pushes and pulls the inner rotor 11 to rotate the inner rotor 11, so that the pump shaft 17 and the impeller 2 are driven to rotate synchronously (magnetic drive); the air sucked from the liquid inlet 21 is mixed with the liquid stored in the liquid storage area 25, the gas-liquid mixture is conveyed to the gas-liquid separation chamber 22 under the rotation of the impeller 2, the air leaves from the liquid outlet 24, the liquid returns to the annular flow passage through the return port 23 until the air is completely discharged (self-priming), and the self-priming vortex pump is driven by magnetic force to start normal operation.

More specifically, in the present embodiment:

the pump cover 1, the pump body 3, the bracket 14 and the motor 19 are arranged from front to back (from left to right in figure 1) in sequence; the pump cover 1 is fixed at the front end of the pump body 3 through bolts, and an annular flow passage which can be provided with the impeller 2 and can accommodate liquid flow and a liquid storage area 25 which can automatically store liquid are formed between the pump cover 1 and the pump body; the rear end of the pump body 3 is fixedly connected with the front end of the bracket 14 through a bolt; the rear end of the bracket 14 is fixedly connected with a motor 19. The impeller 2 disposed in the annular flow passage is provided with 48 blades (the same as the impeller 2 of the conventional vortex pump, the blades are only disposed on the outer edge portion of the impeller 2) on both sides thereof uniformly in the circumferential direction, and the lower portion thereof extends into the liquid storage region 25, so that the liquid stored therein can be taken up when the impeller 2 rotates. The impeller 2 is fixed on the pump shaft 17 through key fit, and can rotate together with the pump shaft 17. As shown in fig. 2, the liquid inlet 21 and the gas-liquid separation chamber 22 on the upper portion of the pump body 3 are respectively connected to the annular flow channel, so that the entering liquid can completely go through the annular flow channel to obtain large kinetic energy, and therefore a baffle is disposed between the liquid inlet 21 and the gas-liquid separation chamber 22, and at the same time, the baffle is required not to influence the rotation of the impeller 2, so that only a small gap is left between the baffle and the impeller 2, and when the impeller 2 rotates counterclockwise (in the structure shown in the figure), the liquid flows from the liquid inlet 21 to the annular flow channel and then moves forward along the rotation direction of the impeller 2, and does not directly leave the pump through the liquid outlet 24. A baffle is also arranged in the gas-liquid separation chamber 22, so that when the magnetically-driven self-priming vortex pump is started, the gas-liquid mixture obtained by mixing the sucked air and the liquid stored in the liquid storage area 25 can firstly move upwards along the baffle and the air can continuously move forwards and leave from the liquid outlet 24 due to the sudden increase of the volume when the liquid is close to the liquid outlet 24, the liquid can cross the baffle to flow back, the liquid flowing to the right side of the baffle returns to the annular flow channel through the annular flow channel and the return port 23 of the gas-liquid separation chamber 22 and is mixed with the gas again until the gas in the pipeline connected with the liquid inlet 21 is completely discharged (self-priming), and then the liquid enters the normal working stage. Flanges are arranged at the end parts of the liquid inlet 21 and the liquid outlet 24, so that the connection with other pipelines is convenient. A pair of supporting feet are arranged at the lower part of the pump body 3, and can complete the supporting of the magnetic driving vortex pump together with the fixed points of the motor 19 and the bracket 14.

The pair of bearings is established to the cover in the pump shaft 17 outside, and the bearing is fixed and is being close to pump shaft 17 front and back both ends position, and it can fixed stay pump shaft 17 to can reduce coefficient of friction at pump shaft 17 rotation in-process, reduce the loss of rotation speed (kinetic energy loss) that friction caused, can also ensure pump shaft 17's gyration precision simultaneously, and then avoid taking place the condition that impeller 2 moved in disorder. The bearing is fixed on the chuck 20 through a positioning pin, and the chuck 20 is fixed on the pump body 3 through the guide pin 4, so that the pump shaft 17 is fixed. The bearing can be divided into a bearing outer ring 7 and a bearing inner ring 9, the bearing inner ring 9 is directly sleeved outside the pump shaft 17, and the bearing outer ring 7 is sleeved outside the bearing inner ring 9. The bearing outer ring 7 and the bearing inner ring 9 are both made of SiC materials which have good wear resistance and corrosion resistance, and in addition, the sealing effect and the bearing performance can be further improved due to high hardness and conductivity. Besides the bearing, a front seat disk 5, a bearing thrust ring 6, a shaft sleeve 8 and a rear seat disk 10 are sleeved on the outer side of the pump shaft 17. Wherein, the bearing thrust rings 6 are provided with a pair, which respectively abut against the outer sides of the bearing outer ring 7 (the outer sides refer to the front end of the bearing outer ring 7 close to the front end and the rear end of the bearing outer ring 7 close to the rear end) and are sleeved outside the bearing inner ring 9, and the bearing thrust rings 6 are arranged for bearing axial force; the shaft sleeve 8 is arranged between the bearings, the front seat disk 5 and the rear seat disk 10 respectively support against the outer sides of the bearing thrust rings 6 (the outer sides refer to the front end of the bearing thrust ring 6 close to the front end and the rear end of the bearing thrust ring 6 close to the rear end), and the parts sleeved on the pump shaft 17 can be fixed by matching with each other. Specifically, the front end of the pump shaft 17 is an impeller 2 which is matched through a key, the rear end of the pump shaft is an inner rotor 11 which is fixed through the key and a round nut 18, a front seat disc 5, a bearing thrust ring 6, a bearing, a shaft sleeve 8, a bearing, the bearing thrust ring 6 and a rear seat disc 10 are sequentially sleeved on the outer side of the pump shaft 17 between the impeller 2 and the inner rotor 11, and mutual abutting is easy to realize fixing. An O-ring 16 is also sleeved on the pump shaft 17 inside the bearing inner ring 9 to further provide sealing capability.

An outer rotor 13 is arranged corresponding to the inner rotor 11 and is not contacted with the outer side (rear end) of the inner rotor, the outer rotor 13 is fixed with the motor 19 through key matching, an isolation sleeve 12 is arranged between the outer rotor 13 and the inner rotor 11, the isolation sleeve 12 is integrally shaped like a Chinese character 'ji', two ends of the isolation sleeve are supported by a bracket 14 at the rear end of the pump body 3 to be fixed, and the middle part of the isolation sleeve is blocked between the outer rotor 13 and the inner rotor 11 to complete the closed space at the side of the inner rotor 11. In order to further improve the tightness, sealing gaskets 15 are arranged between the isolation sleeve 12 and the pump body 3 and between the pump cover 1 and the pump body 3 so as to completely block the leakage of liquid. The outer rotor 13 and the inner rotor 11 are made of magnetic materials, so that the outer rotor 13 can generate a magnetic field after being driven by the motor 19 to rotate so as to drive the inner rotor 11 to rotate (without contact power transmission), and static sealing can be realized; meanwhile, the isolation sleeve 12 is made of a non-magnetic material to prevent the isolation sleeve from changing or moving under the action of a magnetic field, and is specifically made of a carbon fiber reinforced polyetheretherketone (peek) material. Because the vortex pump is characterized by small flow and high lift, the power of the driving motor 19 is usually small, the pump efficiency is low, if the isolation sleeve 12 is made of metal, vortex heat is generated in a magnetic field formed by the rotation of the outer rotor 13, the generated heat cannot be cooled through circulation of small flow, the temperature inside the pump body 3 can be continuously increased, and further, all parts are expanded and deformed under the action of heat, so that the pump cannot normally work; on the premise of not changing materials, in order to overcome the condition of internal high temperature, the flow of the internal circulation needs to be increased, so that the hydraulic performance of the internal circulation is greatly lost, and further the integral flow and the integral lift cannot meet the design requirements and cannot be practically used; the isolation sleeve 12 made of the carbon fiber reinforced peek which is a non-metal material does not generate eddy heat in the formed rotating magnetic field, so that the isolation sleeve 12 does not need to be cooled, the performance is better, the heat resistance is good, the allowable temperature can reach 250 ℃ after continuous use, a thin-walled part which is corrosion-resistant, impact-resistant, wear-resistant and pressure-resistant can be manufactured through simple compression molding, the production efficiency is high, the production cost is low, and the magnetic-driven self-priming vortex pump is suitable for being used in the magnetic-driven self-priming vortex pump of the embodiment.

Impeller 2 is when rotatory doing work (magnetic drive is promptly from inhaling the vortex pump during operation), the blade on impeller 2 can be for the liquid that gets into in the runner pivoted energy transfer, the momentum exchange through three-dimensional flow carries out the energy transfer process, can constantly repeat the transmission energy in the runner of whole pump, the vertical swirl of liquid is once obtained energy through impeller 2 once in the runner, through the stack many times, vertical swirl can have powerful internal energy, it can be with the energy conversion of storage pressure energy and kinetic energy in pump export department, pump next position with liquid pump.

The pump shaft 17 generates heat when it rotates, so that a fluid flow path is also provided between the pump body 3 and the bracket 14. The liquid flow passage starts from a high pressure area (namely a position close to an outlet of the annular flow passage) of the annular flow passage, and flows into a low pressure area of the annular flow passage through the flow guide pin 4, the flow passage in the chuck 20, the flow passage in the pump shaft 17 and the flow passage in the separation sleeve 12, and then the flow passage in the chuck 20 and the flow guide pin 4 close to the low pressure area. Referring to fig. 1, a liquid enters the guide pin 4 from the upper end of the annular flow passage, and flows to the junction between the chuck 20 and the bearing through the flow passage inside the chuck 20, at this time, the liquid lubricates the bearing to further reduce the loss of kinetic energy, then enters the inside of the pump shaft 17 and flows along the inner flow passage of the pump shaft 17 to cool the inside of the pump shaft 17, the liquid then flows out of the inner flow passage of the pump shaft 17 from the rear end of the pump shaft 17 and enters the inner flow passage of the spacer sleeve 12, so as to facilitate the diversion of the liquid and the strength guarantee of the spacer sleeve 12, the spacer sleeve 12 at the outlet of the inner flow passage of the pump shaft 17 is in a form of thickening and obtuse vertex, the liquid entering the inner flow passage of the spacer sleeve 12 continues to flow through the gap between the spacer sleeve 12 and the inner rotor 11, the outer part of the pump shaft 17 and the inner rotor 11 are cooled, and finally flows through the flow passage 20 at the inner flow passage of the chuck 20 at the lower portion of the chuck 20 and flows through the guide pin 4 corresponding to the lower end of the annular flow passage and returns to the annular flow passage, the cooling cycle is completed. Because the liquid flows back to the inner flow channel through the guide pin 4, the leakage possibility of the part of liquid can be effectively reduced, and meanwhile, the leakage of the liquid can be avoided due to the arrangement of the isolation sleeve 12 and the arrangement of the sealing gasket 15. In addition, after the impeller 2 rotates, high pressure and low pressure are automatically formed inside the annular flow passage, so that the circulation of liquid inside the liquid flow passage can be realized without the aid of external force.

The working mode of the magnetic drive self-priming vortex pump of the embodiment is as follows: after the motor 19 is started, the outer rotor 13 rotates under the driving of the motor 19 to form a magnetic field, magnetic field force passes through the isolation sleeve 12 and directly acts on the inner rotor 11 to enable the inner rotor 11 to rotate, and the rotating power can be transmitted to the impeller 2 through the pump shaft 17 matched with the key to enable the impeller 2 to synchronously rotate. Under the rotation of impeller 2, the air in the outside pipeline that is linked together with inlet 21 can be taken out to pump body 3 in, with the liquid (when installing for the first time, liquid accessible inlet 21 adds in the stock solution district 25 in, can be because self structure after the use, automatic partial liquid that remains is in stock solution district 25, need not all to add at every turn) phase mixture, form gas-liquid mixture, gas-liquid mixture is sent to gas-liquid separation room 22 under impeller 2's effect afterwards, under the condition that the volume increases suddenly, gas-liquid mixture can separate, the air can continue upwards to flow out by liquid outlet 24, and liquid then can return back to annular flow path in with the air remixing by return opening 23. After a period of time, the air will be completely exhausted, and the magnetically-driven self-priming volute pump will start to operate normally, and the gas-liquid separation chamber 22 and the return port 23 will be filled with liquid.

The working principle of the utility model is as follows:

when the motor is started, the motor 19 drives the outer rotor 13 to rotate, the rotation of the outer rotor 13 forms a magnetic field, magnetic field force passes through the isolation sleeve 12 and directly acts on the inner rotor 11, the inner rotor 11 further rotates under the action of the magnetic field force, the rotation of the inner rotor 11 drives the pump shaft 17 and the impeller 2 which are fixedly connected to rotate synchronously, and power transmission without direct contact is achieved.

Meanwhile, when the impeller 2 rotates, air in the pipeline is sucked into the annular flow channel and mixed with liquid stored in the liquid storage area 25 to form a gas-liquid mixture, when the gas-liquid mixture rotates to the gas-liquid separation chamber 22 along with the impeller 2, due to the sudden change of the volume, the air leaves the magnetic force driving self-priming vortex pump from the liquid outlet 24 of the gas-liquid separation chamber 22, the liquid flows back into the annular flow channel from the return port 23 communicated with the annular flow channel and is mixed with the air again, after a period of exhaust, the air in the pipeline connected with the liquid inlet 21 is completely discharged, self priming is completed, and then normal work (liquid pumping) is started.

The embodiments described above are intended to facilitate the understanding and use of the utility model by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.

Claims (10)

1. A magnetic drive self-priming vortex pump is characterized by comprising a shell, wherein the front end of the shell is fixedly connected with a pump cover (1) to form an annular flow channel together, and the rear end of the shell is fixedly connected with a motor (19);

the inner part of the shell comprises a pump shaft (17) fixed in the shell through a chuck (20), an impeller (2) in key fit with the front end of the pump shaft (17) and positioned in the annular flow channel, an inner rotor (11) fixed at the rear end of the pump shaft (17), an outer rotor (13) in key fit with a motor (19) and a spacer sleeve (12) arranged between the inner rotor (11) and the outer rotor (13) and fixed on the shell;

the shell is provided with a liquid inlet (21) and a liquid outlet section which are communicated with the annular flow channel, and the liquid outlet section comprises a gas-liquid separation chamber (22) communicated with the annular flow channel, a return opening (23) communicated with the gas-liquid separation chamber (22) and the annular flow channel, and a liquid outlet (24) arranged on the gas-liquid separation chamber (22); the lower end of the impeller (2) is provided with a liquid storage area (25) formed by the shell and the pump cover (1);

the motor (19) drives the outer rotor (13) to rotate, and magnetic field force generated by the outer rotor (13) pushes and pulls the inner rotor (11) to enable the inner rotor (11) to rotate, so that the pump shaft (17) and the impeller (2) are driven to rotate synchronously; air sucked from the liquid inlet (21) is mixed with liquid stored in the liquid storage area (25), the gas-liquid mixture is conveyed to the gas-liquid separation chamber (22) under the rotation of the impeller (2), the air leaves from the liquid outlet (24), the liquid returns to the annular flow channel through the return port (23) until the air is completely discharged, and the magnetic force drives the self-priming vortex pump to start normal operation.

2. The magnetically driven self-priming vortex pump according to claim 1, characterized in that 40-56 blades are uniformly arranged on both sides of the impeller (2) along the circumferential direction.

3. The magnetically driven self-priming vortex pump according to claim 1, characterized in that said housing comprises a fixedly connected pump body (3) and a bracket (14); the pump cover (1) is fixedly connected to the front end of the pump body (3) to form an annular flow channel and a liquid storage area (25) together; the rear end of the bracket (14) is fixedly connected with a motor (19); the liquid inlet (21) and the liquid outlet section are both arranged on the pump body (3); the support (14) enables the isolation sleeve (12) to be abutted against the rear end of the pump body (3).

4. A magnetically driven self-priming volute pump according to claim 3, characterized in that sealing gaskets (15) are provided between the pump cover (1) and the pump body (3) and between the pump body (3) and the isolating sleeve (12).

5. The magnetically-driven self-priming vortex pump according to claim 1, characterized in that a pair of bearings are sleeved on the outside of the pump shaft (17), and the bearings are fixed on the chuck (20) through positioning pins.

6. The magnetically-driven self-priming vortex pump according to claim 5, wherein the bearing comprises a bearing inner ring (9) sleeved outside the pump shaft (17) and a bearing outer ring (7) sleeved outside the bearing inner ring (9), and the bearing outer ring (7) is fixed on the chuck (20) by a positioning pin.

7. The magnetically-driven self-priming vortex pump according to claim 6, wherein a front seat disk (5), a bearing thrust ring (6), a shaft sleeve (8) and a rear seat disk (10) are further sleeved on the outer side of the pump shaft (17), and the shaft sleeve (8) is abutted between the bearings; the bearing thrust rings (6) are provided with a pair and respectively abut against the outer sides of the bearings; the front seat disk (5) and the rear seat disk (10) are respectively abutted to the outer sides of the bearing thrust rings (6).

8. The magnetically-driven self-priming vortex pump according to claim 6, characterized in that a plurality of O-rings (16) are further sleeved on the pump shaft (17) inside the bearing inner ring (9).

9. The magnetically-driven self-priming vortex pump according to claim 1, wherein a fluid flow channel is further provided in the housing, and the fluid flow channel comprises a guide pin (4) for fixing the chuck (20) to the housing, a chuck inner flow channel, a pump shaft inner flow channel, and an inner flow channel of the isolation sleeve.

10. The magnetically driven self-priming vortex pump according to claim 1, characterized in that said spacer sleeve (12) is made of carbon fiber reinforced polyetheretherketone material.

Images