CN111503008A - An amphibious shielded permanent magnet high-speed multistage pump - Google Patents

Abstract

The invention discloses an amphibious shielded permanent magnet high-speed multi-stage pump, which has the advantages of good motor heat dissipation, high lift and high efficiency, and can realize various uses under water and on land. The technical scheme is as follows: It includes a pump casing, a motor assembly and an impeller. The motor assembly includes a motor barrel, a stator, a rotor and a rotor shaft. The pump casing is sleeved on the outside of the motor barrel. The pump casing is provided with an upper connecting seat and a lower connecting seat for fixing the motor barrel. A water-passing cavity is formed between the pump casing and the motor cylinder. The lower end of the rotor shaft is provided with a wheel shaft. The impeller is a multi-stage structure and is installed on the lower end of the rotor shaft. The upper end of the pump casing is provided with a press-out chamber. It is the water inlet. The water inlet, the water passage chamber and the pressure outlet are connected in sequence. The water inlet is provided with a bottom end connecting seat. The invention is applicable to the technical field of water pumps.

Description

An amphibious shielded permanent magnet high-speed multistage pump

technical field

The invention belongs to the technical field of water pumps, in particular to an amphibious shielded permanent magnet high-speed multi-stage pump.

Background technique

The existing water pump, whose function is usually single, can only be used in specific occasions and cannot be used in general. , During the use of the water pump, the motor will generate a lot of heat, and the overheating of the motor can easily lead to damage to the internal components, so the existing water pump needs to be improved.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide an amphibious shielded permanent magnet high-speed multi-stage pump, which has the advantages of good motor heat dissipation, high lift and high efficiency, and can be used for various purposes underwater and on land.

The object of the present invention is achieved in this way: an amphibious shielded permanent magnet high-speed multistage pump, comprising a pump casing, a motor assembly and an impeller, and the motor assembly includes a motor barrel, a stator, a rotor and a rotor shaft, and is characterized in that: The pump casing is sleeved on the outside of the motor cylinder, the upper connecting seat and the lower connecting seat for fixing the motor cylinder are arranged in the pump casing, a water passage is formed between the pump casing and the motor cylinder, a wheel shaft is arranged on the lower end of the rotor shaft, and the impeller is The multi-stage structure is installed on the lower end of the rotor shaft. The upper end of the pump casing is provided with a press-out chamber, and the lower end of the pump casing is a water inlet. The end connection seat, the bottom end connection seat includes a shaft sleeve part adapted to the wheel axle and a threaded connection port for external connection.

The present invention further provides that: the upper connecting seat includes an upper end cover, the lower connecting seat includes a lower end cover, both the upper end cover and the lower end cover are provided with shaft holes, and the shaft holes are provided with graphite sleeves sleeved on the rotor shaft.

According to the present invention, the rotor shaft is further provided with a ceramic coating matched with the graphite sleeve.

The present invention is further provided as follows: the rotor shaft is also sleeved with a thrust structure disposed between the lower connecting seat and the stator, and the thrust structure includes an upper friction sheet, a lower friction sheet and a thrust which are arranged in sequence from top to bottom The upper end surface of the shaft hole of the lower end cover is provided with a spherical groove, and the bottom of the thrust seat is provided with a spherical projection adapted to the spherical groove.

The present invention is further provided as follows: the top surface of the thrust seat is provided with a first limiting groove, and the bottom surface of the lower friction plate is provided with a first limiting protrusion adapted to the first limiting groove. The groove is provided with a second limiting groove, and the outer wall of the spherical convex block is provided with a second limiting convex block adapted to the second limiting groove.

The present invention is further set up as follows: the rotor shaft is also sleeved with a sand throwing mechanism placed under the lower end cover, the sand throwing mechanism includes a suitable sand throwing seat and a sand throwing ring, and a sand throwing seat and the lower end cover are also provided between the sand throwing seat and the lower end cover. There is a skeleton oil seal sleeved on the rotor shaft.

The present invention further provides that: the motor assembly adopts a shielded permanent magnet motor.

The present invention further provides that: the upper end cover and the lower end cover are both provided with water passage holes communicating with the inside of the motor cylinder, and filter screens are arranged on the water passage holes.

The present invention is further provided as follows: an upper friction ring in axial conflict is further provided between the upper end cover and the rotor, and a lower friction ring in axial conflict is also provided between the uppermost end of the impeller and the wheel shaft.

The present invention is further provided that: the upper end cover is provided with a cable cavity for the cable to be drawn out.

Adopting the above technical solution has the following advantages: when in use, the water flow directly passes through the motor casing, the motor dissipates heat quickly and is not easy to generate heat, the efficiency of the whole machine can be improved, and it is more energy-saving and power-saving;

The bottom of the shell is connected to the bottom connection seat, and the multistage pump can be used as a submersible pump underwater when the filter housing is installed on the threaded connection port of the bottom connection seat; when the threaded connection port is flanged, it can be used to install in On the pipeline, it acts as a pipeline booster pump; when the threaded connection port is connected with a one-way valve and a water pipe, it can be used on land as a self-priming pump, so as to achieve amphibious use; in addition, when connected to a pipeline, it can be used in A pressure sensor is set on the water outlet of the multi-stage pump to detect the water pressure. The pressure sensor feeds back the detection signal to the drive control system of the permanent magnet motor, and the drive control system adjusts the speed of the permanent magnet motor according to the pressure change to achieve constant pressurized water supply;

The motor coil is sealed with epoxy resin, which has good waterproof and explosion-proof performance.

Description of drawings

Fig. 1 is the structural representation of the present invention;

The reference signs in the figure are: 1, pump casing; 2, impeller; 3, motor barrel; 4, rotor shaft; 5, upper connecting seat; 6, lower connecting seat; 7, water passage; 8, wheel shaft; 9, Press-out chamber; 10. Bottom connecting seat; 11. Shaft sleeve part; 12. Screw connection port; 13. Upper end cover; 14. Lower end cover; 15. Graphite sleeve; 16. Upper friction plate; 17. Lower friction plate; 18, thrust seat; 19, spherical bump; 20, first limit bump; 21, sand rejection seat; 22, sand rejection ring; 23, skeleton oil seal; 24, upper friction ring; 25, lower friction ring; 26. Cable cavity.

Detailed ways

Below in conjunction with the accompanying drawings, the present invention will be further described with specific embodiments, referring to Fig. 1:

An amphibious shielded permanent magnet high-speed multistage pump, comprising a pump casing 1, a motor assembly and an impeller 2, the motor assembly comprising a motor barrel 3, a stator, a rotor and a rotor shaft 4, characterized in that: one set of the pump casing On the outside of the motor barrel 3, the pump casing 1 is provided with an upper connecting seat 5 and a lower connecting seat 6 for fixing the motor barrel 3, a water passage 7 is formed between the pump casing 1 and the motor barrel 3, and the lower end of the rotor shaft 4 is provided with the upper connecting seat 5 and the lower connecting seat 6. There is a wheel shaft 8, the impeller 2 is a multi-stage structure and is installed on the lower end of the rotor shaft 4, the upper end of the pump casing 1 is provided with a press-out chamber 9, the lower end of the pump casing 1 is the water inlet, the water inlet, the water passage 7 and the The press-out chambers 9 are communicated in sequence, and the water inlet is provided with a bottom end connecting seat 10 , and the bottom end connecting seat 10 includes a shaft sleeve portion 11 adapted to the axle 8 and a threaded connection port 12 for external connection.

The upper connecting seat 5 and the motor barrel 3 and between the lower connecting seat 6 and the motor barrel 3 can be fixed by screws, the upper connecting seat 5 and the pump shell 1 can be connected by riveting, and the lower end of the upper connecting seat 5 is connected to the pump casing 1. The volute outside the impeller 2 interferes axially and plays a fixed role. Both the upper connecting seat 5 and the lower connecting seat 6 need to be provided with water passages, so that the water inlet, the water passage chamber 7 and the pressure outlet chamber 9 can be communicated in sequence; wherein the pump The bottom of the casing 1 is also provided with a bottom cover for fixing the bottom end connecting seat 10. The bottom end of the bottom cover faces the bottom end connecting seat 10 and plays an axial fixing role. The outer peripheral wall of the bottom cover and the pump casing 1 are connected by pins Connection, the bottom cover of the pump casing 1 is also provided with a set screw that axially interferes with the connection seat. Through the above structure, when the top set screw is tightened, the set screw produces an upward pressure on the connection seat. Through the connecting seat, the volute is axially interfered to ensure its stability.

When in use, water is sucked from the water inlet at the bottom end of the pump casing 1, and then passes through the multi-stage impeller 2 and enters the water passage 7, and is then discharged from the water outlet on the press-out chamber 9. Through the above method, the water flow can affect the flow of the motor assembly. The outer wall plays the role of rapid cooling and heat dissipation; the threaded connection port 12 is convenient for external connection of different components according to the requirements of use. For example, when a filter housing is installed on the threaded connection port 12, the multi-stage pump can be used as a submersible pump underwater; when the threaded connection port is used as a submersible pump When the flange plate 12 is attached, it can be used to install on the pipeline and act as a pipeline booster pump; when the threaded connection port 12 is connected to a one-way valve and a water pipe, it can be used on land to act as a self-priming pump.

In addition, when connected to the pipeline, a pressure sensor can be set on the water outlet of the multistage pump to detect the water pressure. The pressure sensor feeds back the detection signal to the drive control system of the permanent magnet motor, and the drive control system changes according to the pressure. The speed of the permanent magnet motor is adjusted to achieve constant pressure water supply.

The upper connecting seat 5 includes an upper end cover 13, and the lower connecting seat 6 includes a lower end cover 14. Both the upper end cover 13 and the lower end cover 14 are provided with shaft holes, and the shaft holes are provided with graphite sleeves 15 sleeved on the rotor shaft 4. .

The graphite sleeve 15 is installed in the shaft hole, and the graphite sleeve 15 and the shaft hole are used to ensure the stability of the rotor shaft 4 during rotation, and at the same time, the graphite sleeve 15 plays a role in reducing wear.

The rotor shaft 4 is also provided with a ceramic coating that cooperates with the graphite sleeve 15. Through the porcelain spraying technology, the ceramic coating is sprayed on the surface of the metal rotor shaft 4 to make it cooperate with the graphite sleeve 15, which can further reduce wear and tear. effect.

The rotor shaft 4 is also sleeved with a thrust structure placed between the lower connecting seat 6 and the stator. The thrust structure includes an upper friction plate 16, a lower friction plate 17 and a thrust seat 18 arranged in sequence from top to bottom , the upper end surface of the shaft hole of the lower end cover 14 is provided with a spherical groove, and the bottom of the thrust seat 18 is provided with a spherical projection 19 which is adapted to the spherical groove.

The top surface of the thrust seat 18 is provided with a first limiting groove, and the bottom surface of the lower friction plate 17 is provided with a first limiting bump 20 that is adapted to the first limiting groove. There is a second limiting groove, and the outer wall of the spherical bump 19 is provided with a second limiting protrusion that is adapted to the second limiting groove.

The thrust structure is used to bear the axial load of the motor assembly, and when the rotor rotates, the upper friction plate 16 rotates smoothly relative to the lower friction plate 17; The groove and the structure of the first limiting protrusion 20 realize the circumferential limit, while the second limiting groove and the second limiting protrusion are adapted to realize the circumferential limit between the thrust seat 18 and the lower connecting seat 6 . The first limit groove and the second limit groove can both be strip-shaped groove structures; the thrust seat 18 and the lower end cover 14 are fitted together by a spherical surface, so that there is an automatic centering effect between them. Stability is better.

The rotor shaft 4 is also sleeved with a sand throwing mechanism placed under the lower end cover 14. The sand throwing mechanism includes a suitable sand throwing seat 21 and a sand throwing ring 22. There is a skeleton oil seal 23 sleeved on the rotor shaft 4 .

The sand throwing seat 21 is statically installed on the slot hole on the lower surface of the lower end cover 14, the skeleton oil seal 23 is located in the sand throwing seat 21, and is used to increase the sealing between the lower end cover 14 and the rotor shaft 4, and the sand throwing ring 22 is connected to the rotor shaft. 4 can be connected by a key or a spline, so that the sand throwing ring 22 can rotate with the rotor shaft 4 to prevent impurities from entering the shaft hole.

The motor assembly adopts a shielded permanent magnet motor, the motor coil is fully encapsulated and sealed by epoxy resin, the water flow can pass through the through hole on the motor casing or the rotor, the motor assembly can fully dissipate heat and prevent explosion, improve efficiency and save energy. Power saving, in the actual test, the water pump can be submerged 1000 meters underwater, and the permanent magnet high-speed motor speed can reach 6000 rpm.

The upper end cover 13 and the lower end cover 14 are both provided with water passage holes communicating with the interior of the motor barrel 3 , and filter screens are provided on the water passage holes.

The water passage facilitates part of the water flow to directly enter the motor. Since the motor adopts a shielded structure, it will not be affected, and the interior of the motor will be dissipated. The filter screen can prevent sediment from entering the motor cylinder 3.

An upper friction ring 24 is also provided between the upper end cover 13 and the rotor, which is in axial conflict, and a lower friction ring 25 is also provided between the uppermost end of the impeller 2 and the axle 8 .

The thickness of the upper friction ring 24 and the lower friction ring 25 can be adjusted according to the axial gap between them, and the axial direction between the upper friction ring 24 and the lower friction ring 25 can be stabilized by the installation of the upper friction ring 24 and the lower friction ring 25 to ensure the stability during rotation. sex.

The upper end cover 13 is provided with a cable cavity 26 for cables to be drawn out. One end of the cable cavity 26 is communicated with the motor barrel 3, and a sealing sleeve for the cable to pass through needs to be set on the connecting end. The other end of the cable cavity 26 can be The extrusion chamber 9 is led out.

The above-mentioned embodiments are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore: all equivalent changes made according to the structure, shape and principle of the present invention shall be covered by the protection of the present invention. within the range.

Claims (10)

1. An amphibious shielded permanent magnet high-speed multistage pump comprises a pump shell (1), a motor assembly and an impeller (2), wherein the motor assembly comprises a motor barrel (3), a stator, a rotor and a rotor shaft (4), and is characterized in that: the utility model discloses a motor pump, including pump case (1), motor case (3), be equipped with in pump case (1) and be used for the last connecting seat (5) and the lower connecting seat (6) of fixed motor case (3), form water passing cavity (7) between pump case (1) and motor case (3), be equipped with shaft (8) on the lower extreme of rotor shaft (4), impeller (2) are multi-stage structure and all install on the lower extreme of rotor shaft (4), the upper end of pump case (1) is equipped with extrusion chamber (9), the lower extreme of pump case (1) is the water inlet, water passing cavity (7) and extrusion chamber (9) communicate in proper order, be equipped with bottom connecting seat (10) on the water inlet, bottom connecting seat (10) include with shaft sleeve portion (11) of shaft (8) adaptation and be used for external threaded connection mouth (12).

2. An amphibious shielded permanent magnet high speed multistage pump according to claim 1, characterised in that: the upper connecting seat (5) comprises an upper end cover (13), the lower connecting seat (6) comprises a lower end cover (14), shaft holes are formed in the upper end cover (13) and the lower end cover (14), and graphite sleeves (15) sleeved on the rotor shafts (4) are arranged in the shaft holes.

3. An amphibious shielded permanent magnet high speed multistage pump according to claim 2, characterised in that: and the rotor shaft (4) is also provided with a ceramic coating matched with the graphite sleeve (15).

4. An amphibious shielded permanent magnet high speed multistage pump according to claim 2, characterised in that: the anti-thrust structure is characterized in that the rotor shaft (4) is further sleeved with an anti-thrust structure arranged between the lower connecting seat (6) and the stator, the anti-thrust structure comprises an upper friction plate (16), a lower friction plate (17) and a thrust block (18) which are sequentially arranged from top to bottom, a spherical groove is formed in the upper end face of the shaft hole of the lower end cover (14), and a spherical convex block (19) matched with the spherical groove is arranged at the bottom of the thrust block (18).

5. An amphibious shielded permanent magnet high speed multistage pump according to claim 4, characterised in that: the top surface of the thrust block (18) is provided with a first limiting groove, the bottom surface of the lower friction plate (17) is provided with a first limiting lug (20) matched with the first limiting groove, a second limiting groove is arranged in the spherical groove, and the outer wall of the spherical lug (19) is provided with a second limiting lug matched with the second limiting groove.

6. An amphibious shielded permanent magnet high speed multistage pump according to claim 2, characterised in that: still the cover is equipped with on rotor shaft (4) and arranges the husky mechanism of getting rid of lower extreme cover (14) below in, gets rid of husky mechanism and includes that the adaptation gets rid of husky seat (21) and get rid of husky ring (22), gets rid of still to be equipped with between husky seat (21) and lower extreme cover (14) skeleton oil blanket (23) of cover on rotor shaft (4).

7. An amphibious shielded permanent magnet high speed multistage pump according to claim 1, characterised in that: the motor assembly adopts a shielding type permanent magnet motor.

8. An amphibious shielded permanent magnet high speed multistage pump according to claim 7, characterised in that: and water passing holes communicated with the inside of the motor barrel (3) are formed in the upper end cover (13) and the lower end cover (14), and filter screens are arranged on the water passing holes.

9. An amphibious shielded permanent magnet high speed multistage pump according to claim 7, characterised in that: an upper friction ring (24) which is axially abutted is further arranged between the upper end cover (13) and the rotor, and a lower friction ring (25) which is axially abutted is further arranged between the uppermost end of the impeller (2) and the wheel shaft (8).

10. An amphibious shielded permanent magnet high speed multistage pump according to claim 7, characterised in that: and a cable cavity (26) for leading out a cable is arranged on the upper end cover (13).

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