CN115492771A - Novel shaftless silent magnetic transmission double-suction rotary shell pump - Google Patents

Abstract

The invention discloses a novel shaftless silent magnetic transmission double-suction rotary shell pump. The pump outer shell is provided with a main shaft, a collecting pipe and a shunting inner shell, a rotor cavity shell sleeved outside the collecting pipe and the main shaft is arranged in the shunting inner shell, a left impeller and a right impeller are arranged in an inner cavity of the rotor cavity shell, and the rotor cavity shell and the left impeller and the right impeller form a whole and rotate around the main shaft and the collecting pipe; fluid flows into a vertical flow channel between the shunting inner shell and the pump outer shell through the top end of the pump outer shell, then sequentially flows into a rotor cavity between the left impeller and the right impeller through a horizontal flow channel between the collecting pipe and the main shaft and a ring flow channel between the impellers and the rotor cavity shell; the permanent magnet steel on the periphery of the rotor cavity shell and the coil winding of the pump shell are matched to drive the pump shell to rotate so as to drive the impeller, fluid enters the rotor cavity from the left side and the right side under the centrifugal action, and then flows out after passing through the hollow channel of the collecting pipe. The invention improves the maximum flow of the rotary shell pump, improves the integral silencing effect of the rotary shell pump, has better flow state of the flow field, prolongs the service life, has smaller size and lighter weight.

Description

Novel shaftless silent magnetic transmission double-suction rotary shell pump

Technical Field

The invention relates to a rotary shell pump, in particular to a novel shaftless silent magnetic transmission double-suction rotary shell pump for fluid conveying in the fields of petrochemical industry, papermaking, food and the like.

Background

The rotary shell pump is a single-stage, cantilever type, small-flow and high-lift pump, is mainly applied to the fields of petrochemical industry, papermaking, food and the like at present, and is used for conveying clean liquid or liquid containing solid particles. Since the rotary shell pump has the advantages of simple structure, small volume, stable operation, low rotating speed, good cavitation resistance and good sealing performance, and the good reputation and the strong subsequent development in the fields, the rotary shell pump is widely applied. The rotary shell pump is a liquid delivery pump of a drilling and flushing system in the automobile manufacturing industry and a feeding pump of a carbon black production line at present, and is a first-choice device in the field of deep well waste treatment of chemical plants, and a standard matching device of high-pressure cleaning systems in food processing, manufacturing workshops, paper making industry and the like.

In the practical engineering application, the single-suction cantilever type rotary shell pump already has excellent performance, but the defects existing in the practical use process are also found, the maximum flow rate and the stability in operation are limited, and in addition, the structure of the motor and the pump body still has larger volume and installation space in the installation and use process, particularly the axial dimension is longer due to the existence of the motor. Meanwhile, due to the adoption of mechanical sealing, leakage exists in the water delivery process.

Disclosure of Invention

In order to overcome the defects of the existing rotary shell pump in the background art, solve the problems in the background art and in combination with actual production, and make some technical improvements and optimizations aiming at the defects of the single-suction small-flow and cantilever type shell rotary shell pump, the invention invents a novel shaftless mute magnetic transmission double-suction rotary shell pump.

The invention can be used for fluid conveying in the fields of petrochemical industry, papermaking, food and the like. Compared with the traditional rotary shell pump, the rotary shell pump has the advantages that the maximum conveying flow of the rotary shell pump is improved, the motor drive is cancelled, the magnetic drive is adopted, the weight and the whole axial length of the rotary shell pump are effectively reduced, the size is smaller, and the weight is lighter. The integral silencing effect of the rotary shell pump is improved, so that the flow state of a flow field is better, and the service life is prolonged;

the technical scheme adopted by the invention is as follows:

the invention comprises a main shaft, a pump shell, a left impeller, a coil winding, permanent magnetic steel, a rotor cavity shell, a collecting pipe and a right impeller; the outer wall of one end of the pump outer shell is connected with and provided with a bearing box, a main shaft is arranged in the bearing box, the end part of the main shaft extends into the pump outer shell, a shunting inner shell is arranged in a cavity in the pump outer shell, a pump shell is fixedly arranged in an inner cavity of the shunting inner shell, a rotor cavity shell is arranged in the pump shell, and the rotor cavity shell is hinged with the pump shell through a hinge shaft along the axial direction of the main shaft; the outer peripheral surface of the rotor cavity shell is embedded with permanent magnet steel, and the inner peripheral surface of the pump shell corresponding to the circumference of the permanent magnet steel is embedded with a coil winding; through holes which are coaxial with the axial direction of the main shaft and are used for the main shaft and the collecting pipe to penetrate through are respectively formed in the two sides of the shunting inner shell, the pump shell and the rotor cavity shell, and the main shaft penetrates through the through holes in one sides of the shunting inner shell, the pump shell and the rotor cavity shell and is arranged in the through holes; the collecting pipe is arranged in a cavity inside the rotor cavity shell and comprises a shaft part and a diameter part, the shaft part extends into the pump shell from the outside of the pump shell and then extends into the rotor cavity shell after penetrating through holes on the other sides of the shunting inner shell, the pump shell and the rotor cavity shell, the shaft part and the main shaft are coaxially arranged but are not connected, the shaft part is connected with the diameter part at the tail end extending into the rotor cavity shell, the diameter part is perpendicular to the shaft part and extends from the end part of the shaft in the radial direction, and the shaft part and the diameter part are connected to form an L shape; the left impeller and the right impeller are arranged in the inner cavity of the rotor cavity shell, the end part of the main shaft extends into the pump shell and penetrates through the shunting inner shell, the pump shell and the end part of the through hole on one side of the rotor cavity shell to be coaxially and fixedly connected with the left impeller, the right impeller is coaxially and movably arranged on the shaft part of the collecting pipe through a water lubrication bearing, and the peripheral edges of the left impeller and the right impeller are fixedly connected to the inner peripheral surface of the rotor cavity shell, so that the rotor cavity shell, the left impeller and the right impeller form a whole and rotate around the main shaft and the shaft part of the collecting pipe.

The top end of the pump outer shell is provided with a liquid inlet, two ends of the shunting inner shell along the axial direction of the main shaft respectively have gaps communicated with the liquid inlet with the inner wall of the inner cavity of the pump outer shell and respectively serve as two independent vertical flow channels, gaps are respectively arranged between the shaft part of the collecting pipe and the main shaft and between the shaft part of the main shaft and the through hole walls of the shunting inner shell, the pump shell and the rotor cavity shell at two sides respectively and respectively serve as a left horizontal flow channel and a right horizontal flow channel, gaps are respectively arranged between the inner end surface of the rotor cavity shell at one side close to the left impeller and between the inner end surface of the rotor cavity shell at one side close to the right impeller and respectively serve as a left annular flow channel and a right annular flow channel; the inner cavity part of the rotor cavity shell between the left impeller and the right impeller is used as a rotor cavity, the outer ring parts of the two annular flow channels corresponding to the left impeller and the right impeller are communicated with the rotor cavity through the hollow through grooves between the peripheral edges of the left impeller and the right impeller and the inner circumferential surface of the rotor cavity shell, and the inner ring parts of the two annular flow channels corresponding to the left impeller and the right impeller are respectively communicated with the two vertical flow channels through the left horizontal flow channel and the right horizontal flow channel corresponding to the shaft parts of the main shaft and the collecting pipe.

Fluid flows into the two vertical flow channels at the front end and the rear end of the shunting inner shell along the axial direction of the main shaft after flowing in from the liquid inlet, the two vertical flow channels respectively flow into the two annular flow channels corresponding to the left impeller and the right impeller after passing through the left horizontal flow channel and the right horizontal flow channel, and then flow into the rotor cavity through the hollow through grooves between the peripheral edges of the left impeller and the right impeller and the inner peripheral surface of the rotor cavity shell.

The top surface of the shunting inner shell opposite to the liquid inlet is provided with a ridge-shaped surface as an inlet section wall surface.

The collecting pipe diameter part is positioned in the rotor cavity, the tail end of the collecting pipe diameter part is perpendicularly bent along the tangential direction to form a bent part, and the tangential direction of the perpendicular bending of the collecting pipe bent part is opposite to the tangential direction of an hour hand rotating around the main shaft and the collecting pipe shaft part, wherein the whole body is formed by the rotor cavity shell, the left impeller and the right impeller; the collecting pipe is internally provided with a hollow passage, the hollow passage is communicated with the bent part from the shaft part of the collecting pipe through the radial part, two ends of the hollow passage respectively penetrate through the end faces of the shaft part and the bent part of the collecting pipe, and the port of the hollow passage on the shaft part of the collecting pipe is used as a liquid outlet; the fluid in the rotor cavity flows in through the hollow channel inlet on the end face of the bent part of the collecting pipe and flows out from the hollow channel outlet on the end face of the shaft part of the collecting pipe.

The collecting main prevents the leakage of the fluid medium by means of mechanical sealing. The mechanical seal mainly refers to a structure between the collecting pipe and the rotor, so that leakage of fluid in operation is prevented, and the reliability of the seal is good.

The middle part of the main shaft penetrates out of the pump shell and then is sleeved in the bearing box through the bearing support, the bearing box is filled with lubricating oil, and the other end of the main shaft is connected with the bearing box and self-lubricated through the lubricating oil in the bearing box.

The top of the bearing box is provided with an oil filling through hole, an oil plug is arranged in the oil filling through hole, and an oil pointer is arranged at the bottom of the bearing box.

The rotor cavity shell, the left impeller and the right impeller are integrally cast.

The rotor cavity shell and the pump shell are in transmission connection through magnetic force of the coil winding and the permanent magnet steel, namely the coil winding is electrified, and a magnetic field generated by the coil winding drives the permanent magnet steel to rotate so as to drive the rotor cavity shell to rotate in the pump shell.

The wall surface of the inlet section and the left and right flow channels of the invention mean that when fluid medium flows vertically downwards from the liquid inlet, the fluid flows into the rotor cavity from the left and right channels respectively due to the action of the wall surface of the inlet section. The left channel is formed by the main shaft and the rotor cavity shell, and the right channel is formed by the collecting pipe and the rotor cavity shell.

Permanent magnet steel is embedded in the outer periphery of the rotor cavity shell, and the coil winding is installed in the pump shell. The rotary shell pump is connected with the coil winding through an electric wire by means of an external three-phase power supply to form an annular rotary variable magnetic field surrounding the pump shell, and the permanent magnetic steel in the rotor cavity shell is driven to rotate.

Fluid medium flows in through the liquid inlet, the liquid inlet is arranged in the vertical direction of the rotor cavity, a rotor cavity shell, a pump shell for fixedly supporting the rotor cavity shell at two ends, an inner cavity and an inlet section wall surface for flow separation are sequentially arranged between the rotor cavity and the liquid inlet from inside to outside, the fluid flows and is separated left and right under the action of the inlet section wall surface, the rotor cavity shell drives the impeller to rotate under the action of magnetic force due to the fact that the impeller is connected with the rotor cavity shell, the fluid enters the rotor cavity rotating synchronously at high speed from the left side and the right side under the action of centrifugal force of the left impeller and the right impeller, liquid around the rotor cavity has high pressure, the high-speed liquid flows into a static collecting pipe, the flow pipe is equivalent to a water pressing chamber of a common centrifugal pump and has a pressure expansion effect, the speed energy is converted into pressure energy, and finally the high-pressure liquid is output through the collecting pipe.

Compared with the prior art, the invention has the beneficial effects that:

the double-suction inlet is adopted, and compared with the traditional spiral shell pump, the double-suction inlet is sensitive to cavitation during medium conveying, so that the flow velocity of the inlet is not easy to be overlarge, and the maximum flow which can be conveyed by the spiral shell pump is limited; meanwhile, under the same cavitation allowance requirement, the maximum conveying flow of the rotary shell pump can be increased, and the double-suction inlet can enable the axial force of the rotary shell pump to be self-balanced.

The rotary shell pump provided by the invention has the advantages that the motor drive is omitted, the shaftless electromagnetic drive is adopted, the weight and the whole axial length of the rotary shell pump are effectively reduced, the size is smaller, and the weight is lighter. Compared with the traditional motor drive, the shaftless electromagnetic drive pump can reduce noise, improve internal flow state and reduce flow loss.

Drawings

FIG. 1 is a cross-sectional view of the present invention;

FIG. 2 is a three-dimensional view of a manifold;

fig. 3 is a sectional view of the impeller.

In the figure: 1. oil pointer, 2, bearing, 3, main shaft, 4, bearing box, 5, oil plug, 6, felt ring, 7, pump shell, 8, left horizontal flow channel, 9, left impeller, 10, liquid inlet, 11, inlet section wall surface, 12, inner cavity, 13, pump shell, 14, coil winding, 15, permanent magnet steel, 16, rotor cavity shell, 17, collecting pipe, 18, water lubrication bearing, 19, packing seal, 20, right horizontal flow channel, 21, liquid outlet, 22, right impeller, 23 and rotor cavity.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

As shown in fig. 1, the pump includes a main shaft 3, a pump housing 7, a left impeller 9, a coil winding 14, a permanent magnet 15, a rotor cavity housing 16, a collecting pipe 17, and a right impeller 22.

The outer wall of one end of the pump shell 7 is coaxially connected with and provided with a bearing box 4, a main shaft 3 is coaxially arranged in the bearing box 4 through a bearing 2, the end part of the main shaft 3 extends into the pump shell 7, and a felt ring 6 is arranged for sealing when the main shaft 3 penetrates through the pump shell 7. A shunting inner shell is installed in a cavity inside a pump outer shell 7, the bottom of the shunting inner shell is fixed to the bottom of the pump outer shell 7, a pump shell 13 is fixedly arranged in an inner cavity 12 of the shunting inner shell, a rotor cavity shell 16 is arranged in the pump shell 13, the rotor cavity shell 16 is hinged with the pump shell 13 through a hinge shaft along the axial direction of a main shaft 3, the rotor cavity shell 16 is rotatably hinged with the pump shell 13 through a packing seal 19, and the rotor cavity shell 16 is rotatably connected with the bottoms of the two ends of the shunting inner shell and the bottom of the inner cavity of the pump outer shell 7 in a sealing mode. Specifically, the end faces of the through holes at the two ends of the rotor cavity shell 16 are respectively and rotationally connected with the bottoms at the two ends of the shunt inner shell and the bottom of the pump outer shell 7 through packing seals 19.

As shown in fig. 1, in a specific implementation, a pump housing 13 is installed in an inner cavity of the shunting inner shell, the pump housing 13 is sleeved outside a rotor cavity housing 16 above a collecting pipe 17 and a main shaft 3, an inner surface of the pump housing 13 is connected with an outer surface of the rotor cavity housing 16 in a rotating fit manner, and two ends of the rotor cavity housing 16 are axially fixed under the action of the pump housing 13 for fixing and supporting, so that the left end and the right end of the rotor cavity housing 16 can be well axially fixed, and the stability of the rotor cavity housing 16 in a rotating process can be ensured.

The outer peripheral surface of the rotor cavity shell 16 is inlaid with annular permanent magnet steel 15, the coil winding 14 is installed in the pump housing 13, the inner peripheral surface of the pump housing 13 corresponding to the circumference of the permanent magnet steel 15 is inlaid with annular coil winding 14, the rotor cavity shell 16 and the pump housing 13 are connected through magnetic transmission of the coil winding 14 and the permanent magnet steel 15, namely, the coil winding 14 is electrified, a magnetic field generated through the coil winding 14 drives the permanent magnet steel 15 to rotate, and then the rotor cavity shell 16 is driven to rotate in the pump housing 13.

The through holes which are coaxial with the main shaft 3 and are used for the main shaft 3 and the collecting pipe 17 to penetrate through are respectively arranged on two sides of the shunting inner shell, the pump shell 13 and the rotor cavity shell 16, and the main shaft 3 penetrates through the through holes in one side of the shunting inner shell, the pump shell 13 and the rotor cavity shell 16 to be arranged.

Install pressure manifold 17 in the inside cavity of rotor chamber shell 16, pressure manifold 17 includes axial region and footpath, the axial region stretches into in pump shell 7 from pump shell 7 is outer, the axial region wears to establish when pump shell 7 and pump shell 7 fixed connection, wear to establish the reposition of redundant personnel inner shell again, stretch into in rotor chamber shell 16 behind the other side through-hole of pump shell 13 and rotor chamber shell 16, axial region and main shaft 3 coaxial arrangement are not continuous, relative arrangement is in the both sides of reposition of redundant personnel inner shell, pump shell 13 and rotor chamber shell 16, the end connection footpath of axial region in stretching into rotor chamber shell 16, the footpath is perpendicular to the axial region and extends along radial direction from axial region tip, the axial region is connected with the footpath and is formed the L shape.

The left impeller 9 and the right impeller 22 are arranged in the inner cavity of the rotor cavity shell 16, the end part of the main shaft 3 extends into the pump outer shell 7 and penetrates through the shunting inner shell, the pump shell 13 and the end part of the rotor cavity shell 16 after passing through a through hole at one side and then is coaxially and fixedly connected with the left impeller 9, the left impeller 9 and the main shaft 3 are coaxially sleeved and fixed through a round head flat key, the right impeller 22 is coaxially and movably arranged on the shaft part of the collecting pipe 17 through a water lubricating bearing 18, and the peripheral edges of the left impeller 9 and the right impeller 22 are fixedly connected to the inner peripheral surface of the rotor cavity shell 16, so that the rotor cavity shell 16, the left impeller 9 and the right impeller 22 form a whole and rotate around the shaft part of the main shaft 3 and the collecting pipe 17.

The liquid inlet 10 is arranged at the top end of the pump outer shell 7, gaps communicated with the liquid inlet 10 are respectively arranged between two axial ends of the shunting inner shell along the main shaft 3 and the inner wall of the inner cavity of the pump outer shell 7 and respectively used as two independent vertical flow channels, gaps are respectively arranged between the shaft part of the collecting pipe 17 and the main shaft 3 and between the shaft part of the collecting pipe 3 and the shunting inner shell, the pump shell 13 and through hole walls on two sides of the rotor cavity shell 16 and respectively used as a left horizontal flow channel 8 and a right horizontal flow channel 20, gaps are respectively arranged between the inner end surface of one side, close to the left impeller 9, of the rotor cavity shell 16 and the inner end surface of one side, close to the right impeller 22, of the rotor cavity shell 16 and the right impeller 22 and respectively used as a left annular flow channel and a right annular flow channel.

As shown in fig. 3, the outer edges of the left impeller 9 and the right impeller 22 are respectively provided with a hollow through groove between the inner peripheral surface of the rotor cavity shell 16, the inner cavity part of the rotor cavity shell 16 between the left impeller 9 and the right impeller 22 is used as a rotor cavity 23, the outer ring parts of the two annular flow passages corresponding to the left impeller 9 and the right impeller 22 are communicated with the rotor cavity 23 through the hollow through grooves between the edges of the left impeller 9 and the right impeller 22 and the inner peripheral surface of the rotor cavity shell 16, and the inner ring parts of the two annular flow passages corresponding to the left impeller 9 and the right impeller 22 are respectively communicated with the two vertical flow passages between the shunting inner shell and the pump outer shell 7 through the left horizontal flow passage 8 and the right horizontal flow passage 20 corresponding to the shaft parts of the main shaft 3 and the current collecting pipe 17.

After flowing in from the liquid inlet 10, the fluid flows into two vertical flow channels at the front end and the rear end of the inner shunting shell along the axial direction of the spindle 3 under the guiding action of the wall surface 11 of the inlet section, and the two vertical flow channels respectively flow into two annular flow channels corresponding to the left impeller 9 and the right impeller 22 after passing through the left horizontal flow channel 8 and the right horizontal flow channel 20, and then flow into the rotor cavity 23 through the hollow through grooves between the peripheral edges of the left impeller 9 and the right impeller 22 and the inner circumferential surface of the rotor cavity shell 16.

The top surface of the inner shunting shell opposite to the liquid inlet 10 is provided with a ridge-shaped surface as an inlet section wall surface 11, and fluid flowing in from the liquid inlet 10 impacts the inlet section wall surface 11. The wall surface 11 of the inlet section is used as a flow passage of fluid medium, and the surface of the inlet section is subjected to smoothing treatment and corrosion prevention treatment.

As shown in fig. 2, the diameter part of the collecting pipe 17 is located in the rotor cavity 23, the end of the diameter part of the collecting pipe 17 is perpendicularly bent along the tangential direction to form a bent part, and the tangential direction of the bent part of the collecting pipe 17 is opposite to the tangential direction of the hour hand which is formed by the rotor cavity shell 16, the left impeller 9 and the right impeller 22 and rotates around the main shaft 3 and the shaft part of the collecting pipe 17; a hollow passage is formed in the collecting pipe 17, the hollow passage is communicated with the bent part from the shaft part of the collecting pipe 17 through the radial part, two ends of the hollow passage respectively penetrate through the end faces of the shaft part and the bent part of the collecting pipe 17, and a port of the hollow passage on the shaft part of the collecting pipe 17 is used as a liquid outlet 21; the fluid in the rotor cavity 23 flows in through the hollow channel inlet on the end face of the bent part of the collecting pipe 17 and flows out from the hollow channel outlet on the end face of the shaft part of the collecting pipe 17, and the end face of the shaft part of the collecting pipe 17 is fixed on the pump shell 7. The hollow channel on the end face of the shaft part of the collecting pipe 17 is used as a liquid outlet 21 of the double-suction rotary shell pump.

The liquid inlet 10 makes fluid medium flow and separate under the action of the wall surface 11 of the inlet section, and the fluid medium respectively enters the rotor cavity 23 from a left flow channel and a right flow channel which are formed by sequentially connecting a left vertical flow channel, a right horizontal flow channel and an annular flow channel under the action of the left impeller 9 and the right impeller 22, so that the fluid enters the rotor cavity 23 from the left side and the right side, and finally flows out of the liquid outlet 21 through the collecting pipe 17.

The middle part of main shaft 3 is worn out pump case 7 and is supported the suit through bearing 2 in bearing box 4, is filled with lubricating oil in bearing box 4, and the other end of main shaft 3 links to each other with bearing box 4 to lubricating oil through in the bearing box 4 carries out the self-lubricating.

The oiling through-hole that is used for bearing box 4 to 4 oiling of bearing box is seted up at the top of bearing box 4, installs oil plug 5 in the oiling through-hole, and oil pointer 1 that is used for monitoring 4 interior oil capacities of bearing box is installed to the bottom of bearing box 4, can make things convenient for the interpolation and the monitoring of lubricating oil more like this.

The hole end faces of the through holes at the two ends of the rotor cavity shell 16 are respectively and rotationally connected with the bottoms at the two ends of the shunt inner shell and the bottom of the pump outer shell 7 through packing seals 19. A felt ring 6 is installed between the main shaft 3 and the pump housing 7 for sealing.

The left main shaft and the right collecting pipe 17 are sealed by a packing seal 19 to prevent the leakage of fluid medium, so that no fluid enters the inner cavity 12 between the pump shell 13 and the shunting inner shell; the gap between the collecting pipe 17 and the right impeller 22 is filled with water flow and is connected through the water lubrication bearing 18, so that the right bearing can rotate better on one hand, and the collecting pipe and the rotor cavity can be sealed better on the other hand. And the pressure between the main shaft 3 and the pump shell 7 is not high, and a felt ring 8 seal is selected instead of a mechanical seal selected by a common rotary shell pump, so that the leakage of fluid in operation is prevented, and the reliability of the seal is good.

The rotor cavity shell 16, the left impeller 9 and the right impeller 22 are integrally cast. The main shaft is connected with the left impeller through a key, the left impeller and the right impeller are integrated with the whole rotor cavity shell, so that the left impeller and the right impeller are easier and more convenient to mount and dismount. The traditional rotary shell pump is characterized in that a rotor cavity shell and a main shaft are connected into a whole through an impeller and a shell which are connected together through a screw, and the problem that the traditional rotary shell pump cannot be conveniently disassembled and assembled is solved.

The rotor cavity shell 16 is in transmission connection with the pump shell 13 through magnetic force of the coil winding 14 and the permanent magnet steel 15, namely the coil winding 14 is electrified, a magnetic field generated by the coil winding 14 drives the permanent magnet steel 15 to rotate, and then the rotor cavity shell 16 is driven to rotate in the pump shell 13.

The pump housing 13 is sleeved outside the rotor cavity housing 16, and the inner surface of the pump housing 13 is in transmission connection with the outer surface of the rotor cavity housing 16 through magnetic force. The rotary shell pump is connected with the coil winding 14 through an electric wire by virtue of an external three-phase power supply to form an annular rotary variable magnetic field surrounding the pump shell, and drives the permanent magnet steel 15 in the rotor cavity shell 16 to rotate so as to drive the left impeller and the right impeller to operate; the fluid in the rotor cavity shell 16 is accelerated and pressurized by the impeller volute and then flows out from the liquid outlet 21 of the collecting pipe 17.

Thus, shaftless electromagnetic driving is realized, noise is reduced, the internal flow state is improved, and flow loss is reduced.

The invention realizes double suction of the rotary shell pump through the separation of the wall surfaces of the inlet section and the action of the left impeller and the right impeller, effectively reduces noise, improves internal flow state, reduces flow loss and the weight and the whole axial length of the rotary shell pump by canceling motor drive and adopting shaftless electromagnetic drive, and has smaller size and lighter weight.

In specific implementation, as shown in fig. 1, the working process of the present invention is as follows:

after the pump is first installed in the pipeline and set, the coil winding 14 is supplied with three-phase alternating current, so that a circular rotating and changing magnetic field is formed in the coil winding 14 around the pump housing. When the permanent magnet steel 15 around the rotor cavity shell induces the changing magnetic field, induced current is generated, and the permanent magnet steel 15 rotates under the action of lorentz force in the magnetic field, and the permanent magnet steel 15 is embedded in the outer circumference of the rotor cavity shell 16, and the left impeller 9, the right impeller 22 and the rotor cavity shell 16 are connected, so that the impeller is driven to rotate integrally.

In the integral rotation process formed by the rotor cavity shell 16, the left impeller 9 and the right impeller 22, a fluid medium enters the interior of the pump shell 7 through the liquid inlet 10, respectively enters the left horizontal flow channel 8 at the main shaft side and the right horizontal flow channel 20 at the collecting pipe side from the vertical flow channel at the main shaft side and the vertical flow channel at the collecting pipe side along the inlet section wall 11 under the action of the inlet section wall 11, and then respectively enters the annular flow channel at the main shaft side and the inner ring part of the annular flow channel at the collecting pipe side and then flows into the rotor cavity 23;

the two impellers and the rotor cavity shell 16 rotate to generate centrifugal force, so that fluid media in the rotor cavity 23 are driven to be thrown to the outer edge of the rotor cavity 23 from the center of the rotor cavity 23, the speed is increased, certain pressure is achieved, high speed energy is achieved, and due to the rotation of the left impeller and the right impeller, fluid in left flow channels and fluid in right flow channels have high speed energy, so that double suction on the left side and the right side can be achieved, and the maximum flow of the rotary shell pump is improved.

Because the bending tangential direction of the bending part at the tail end of the diameter part of the collecting pipe 17 is opposite to the rotating direction of the two impellers and the rotor cavity shell 16, the fluid which flows in a rotating way at the outer edge of the rotor cavity 23 enters the hollow channel inlet at the end face of the bending part of the collecting pipe 17 and then flows out from the hollow channel outlet at the end face of the shaft part of the collecting pipe 17.

The implementation of the invention can be seen that the invention designs a double-suction inlet formed on the wall surface of the inlet section and a structure for driving the rotor cavity shell and the impeller to rotate by means of magnetic transmission, and fully utilizes the structure of the double-suction inlet formed on the separation cavity shell, thereby improving the maximum flow of the spiral shell pump, canceling the motor drive, realizing shaftless drive by electromagnetic drive, improving the integral mute effect of the spiral shell pump, ensuring that the flow state of a flow field is better and prolonging the service life; the rotary shell pump has the advantages of effectively reducing the weight and the whole axial length of the rotary shell pump, along with smaller size and lighter weight.

Claims (10)

1. The utility model provides a novel shaftless silence magnetic drive double suction revolves shell pump which characterized in that:

the permanent magnet synchronous motor comprises a main shaft (3), a pump shell (7), a left impeller (9), a coil winding (14), permanent magnet steel (15), a rotor cavity shell (16), a collecting pipe (17) and a right impeller (22); the outer wall of one end of the pump outer shell (7) is connected with and provided with the bearing box (4), the main shaft (3) is arranged in the bearing box (4), the end part of the main shaft (3) extends into the pump outer shell (7), the cavity in the pump outer shell (7) is internally provided with the shunting inner shell, the inner cavity (12) of the shunting inner shell is fixedly provided with the pump shell (13), the pump shell (13) is internally provided with the rotor cavity shell (16), and the rotor cavity shell (16) is hinged with the pump shell (13) through a hinge shaft along the axial direction of the main shaft (3); the outer peripheral surface of the rotor cavity shell (16) is embedded with permanent magnet steel (15), and the inner peripheral surface of the pump shell (13) corresponding to the circumference of the permanent magnet steel (15) is embedded with a coil winding (14);

through holes which are coaxial with the main shaft (3) and used for the main shaft (3) and the collecting pipe (17) to penetrate through are respectively formed in two sides of the shunting inner shell, the pump shell (13) and the rotor cavity shell (16), and the main shaft (3) penetrates through the through holes in one side of the shunting inner shell, the pump shell (13) and the rotor cavity shell (16) to be arranged; a collecting pipe (17) is arranged in a cavity inside the rotor cavity shell (16), the collecting pipe (17) comprises a shaft part and a radial part, the shaft part extends into the pump outer shell (7) from the outside of the pump outer shell (7), and then extends into the rotor cavity shell (16) after penetrating through holes on the other sides of the flow distribution inner shell, the pump shell (13) and the rotor cavity shell (16), the shaft part and the main shaft (3) are coaxially arranged but are not connected, the shaft part is connected with the radial part at the tail end extending into the rotor cavity shell (16), the radial part is perpendicular to the shaft part and extends from the end part of the shaft to the radial direction, and the shaft part and the radial part are connected to form an L shape;

the inner cavity of the rotor cavity shell (16) is internally provided with a left impeller (9) and a right impeller (22), the end part of the main shaft (3) extends into the pump outer shell (7) and penetrates through the shunting inner shell, the pump shell (13) and the end part of the rotor cavity shell (16) after passing through a through hole at one side to be coaxially and fixedly connected with the left impeller (9), the right impeller (22) is coaxially and movably arranged on the shaft part of the collecting pipe (17) through a water lubricating bearing (18), and the peripheral edges of the left impeller (9) and the right impeller (22) are fixedly connected to the inner peripheral surface of the rotor cavity shell (16), so that the rotor cavity shell (16), the left impeller (9) and the right impeller (22) form a whole and rotate around the shaft part of the main shaft (3) and the collecting pipe (17).

2. The novel shaftless silent magnetic transmission double-suction rotary shell pump as claimed in claim 1, wherein: a liquid inlet (10) is formed in the top end of the pump outer shell (7), gaps communicated with the liquid inlet (10) are formed between two ends of the shunting inner shell along the axial direction of the main shaft (3) and the inner wall of an inner cavity of the pump outer shell (7) respectively and used as two independent vertical flow channels, gaps are formed between the shaft part of the collecting pipe (17) and the main shaft (3) and between the shaft part of the shunting inner shell, the pump shell (13) and the through hole walls on two sides of the rotor cavity shell (16) respectively and used as a left horizontal flow channel (8) and a right horizontal flow channel (20), gaps are formed between the inner end surface of the rotor cavity shell (16) close to one side of the left impeller (9) and the left impeller (9), and gaps are formed between the inner end surface of the rotor cavity shell (16) close to one side of the right impeller (22) and used as a left annular flow channel and a right annular flow channel respectively;

the inner cavity part of a rotor cavity shell (16) between a left impeller (9) and a right impeller (22) is used as a rotor cavity (23), the outer ring parts of two annular flow channels corresponding to the left impeller (9) and the right impeller (22) are communicated with the rotor cavity (23) through hollow through grooves between the peripheral edges of the left impeller (9) and the right impeller (22) and the inner circumferential surface of the rotor cavity shell (16), and the inner ring parts of the two annular flow channels corresponding to the left impeller (9) and the right impeller (22) are communicated with two vertical flow channels through a left horizontal flow channel (8) and a right horizontal flow channel (20) corresponding to the shaft parts of a main shaft (3) and a collecting pipe (17) respectively.

3. The novel shaftless mute magnetic transmission double-suction rotary shell pump as claimed in claim 2, wherein: fluid flows into the two vertical flow channels at the front end and the rear end of the inner shunting shell along the axial direction of the main shaft (3) after flowing into the fluid from the fluid inlet (10), the two vertical flow channels respectively flow into the two annular flow channels corresponding to the left impeller (9) and the right impeller (22) after passing through the left horizontal flow channel (8) and the right horizontal flow channel (20), and then flow into the rotor cavity (23) through the hollow through grooves between the peripheral edges of the left impeller (9) and the right impeller (22) and the inner circumferential surface of the rotor cavity shell (16).

4. The novel shaftless silent magnetic transmission double-suction rotary shell pump as claimed in claim 1, wherein: the top surface of the shunting inner shell opposite to the liquid inlet (10) is provided with a ridge-shaped surface as an inlet section wall surface (11).

5. The novel shaftless silent magnetic transmission double-suction rotary shell pump as claimed in claim 1, wherein: the diameter part of the collecting pipe (17) is positioned in the rotor cavity (23), the tail end of the diameter part of the collecting pipe (17) is perpendicularly bent along the tangential direction to form a bent part, and the tangential direction of the bent part of the collecting pipe (17) is opposite to the tangential direction of an hour hand which is formed by the rotor cavity shell (16), the left impeller (9) and the right impeller (22) and rotates around the spindle (3) and the shaft part of the collecting pipe (17); a hollow channel is formed in the collecting pipe (17), the hollow channel is communicated with the bent part from the shaft part of the collecting pipe (17) through the radial part, two ends of the hollow channel respectively penetrate through the shaft part of the collecting pipe (17) and the end face of the bent part, and the port of the hollow channel on the shaft part of the collecting pipe (17) is used as a liquid outlet (21); the fluid in the rotor cavity (23) flows in through the hollow channel inlet on the end face of the bent part of the collecting pipe (17) and flows out from the hollow channel outlet on the end face of the shaft part of the collecting pipe (17).

6. The novel shaftless silent magnetic transmission double-suction rotary shell pump as claimed in claim 1, wherein: the middle part of the main shaft (3) penetrates out of the pump shell (7) and then is supported and sleeved in the bearing box (4) through the bearing (2), the bearing box (4) is filled with lubricating oil, the other end of the main shaft (3) is connected with the bearing box (4), and self-lubricating is carried out through the lubricating oil in the bearing box (4).

7. The novel shaftless silent magnetic transmission double-suction rotary shell pump as claimed in claim 6, wherein: the top of bearing box (4) seted up the oiling through-hole, install in the oiling through-hole oil plug (5), oil pointer (1) is installed to the bottom of bearing box (4).

8. The novel shaftless silent magnetic transmission double-suction rotary shell pump as claimed in claim 1, wherein: the rotor cavity shell (16), the left impeller (9) and the right impeller (22) are integrally cast.

9. The novel shaftless silent magnetic transmission double-suction rotary shell pump as claimed in claim 1, wherein: the rotor cavity shell (16) is in transmission connection with the pump shell (13) through magnetic force of the coil winding (14) and the permanent magnet steel (15), namely the coil winding (14) is electrified, a magnetic field generated by the coil winding (14) drives the permanent magnet steel (15) to rotate, and then the rotor cavity shell (16) is driven to rotate in the pump shell (13).

10. The application of the novel shaftless silent magnetic transmission double-suction rotary shell pump as claimed in any one of claims 1 to 9, which is characterized in that: the method is applied to fluid conveying in the fields of petrochemical industry, papermaking, food and the like.

Images