CN211975410U

CN211975410U - Self-priming pump

Info

Publication number: CN211975410U
Application number: CN202020658506.2U
Authority: CN
Inventors: 陈斌
Original assignee: Zhejiang Wigo Co ltd
Current assignee: Zhejiang Weige Intelligent Pump Industry Co ltd
Priority date: 2020-04-26
Filing date: 2020-04-26
Publication date: 2020-11-20
Anticipated expiration: 2030-04-26

Abstract

The utility model provides a self priming pump belongs to mechanical technical field. It has solved the not high problem of current self priming pump cooling effect. This self priming pump includes the pump case, impeller assembly and motor, the pump chamber has in the pump case, be equipped with the impeller assembly in the pump chamber, the motor peripheral hardware has the shell, establish rotor and stator in the casing, be equipped with the pivot of interior cavity form on the rotor, one end and impeller assembly are connected, the other end is equipped with the bearing and articulates with the rear end housing of casing, the front end housing is established to the casing end, set up the connecting hole on the front end housing, set up logical groove on the rear end housing, the housing is established to the rotor overcoat, form sealed cooling chamber between housing and the rotor, its one end supports tightly with the front end housing, the other end supports tightly with the support portion of rear end housing, the housing with support and be equipped with sealing washer one between the portion. The self-priming pump can be used for delivering water sucked by the rotating shaft to the cooling cavity to dissipate heat of the rotor, and can return to the pump cavity through the connecting hole and be discharged through the water outlet pipe.

Description

Self-priming pump

Technical Field

The utility model belongs to the technical field of machinery, a self priming pump is related to.

Background

The pump is the more popular instrument among people's daily life, and self priming pump is as one kind of pump, by in the middle of people's extensive application to daily life and industrial production, current self priming pump generally all includes parts such as impeller, motor, water inlet, delivery port, liquid storage pot, and when the motor began work, the motor shaft can drive the rotatory centrifugal force that produces of impeller, makes the impeller inhale the pump intracavity with external water, along with the continuous quilt of water is inhaled, water also can pass through pipeline flow direction delivery port or liquid storage pot.

When the motor starts, a magnetic field is generated between the rotor and the stator in the motor, the rotor starts to rotate at a high speed to drive the rotating shaft, but due to long-time rotation, the rotor can be overheated, the service life of the rotor can be greatly reduced, so that a cooling jacket is arranged outside the motor by general people, the cooling jacket is internally provided with cooling liquid, and when the motor works, the cooling liquid can absorb heat emitted by the rotation of the rotor, so that a certain cooling effect is achieved.

However, this cooling method has the disadvantages that the rotor is installed in the stator, the stator is fixed in the motor, the cooling jacket is installed outside the motor and only fully contacts with the casing of the motor, the motor casing and the stator are separated from the rotor, the heat energy generated by the rotor needs to be transferred outside through the stator and the casing, the rotor is not cooled sufficiently, and the rotor is still in a high temperature state for a long time, and the service life of the rotor itself is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at having the above-mentioned problem to current technique, provided a self priming pump, the utility model aims to solve the technical problem that: how to make self priming pump cooling effect better.

The purpose of the utility model can be realized by the following technical proposal: the utility model provides a self priming pump, includes pump case, impeller group and motor, is equipped with the pump chamber in the pump case, impeller group installs at the pump intracavity, and the motor includes casing, stator, rotor and pivot, casing one end is equipped with the front end housing, and the other end is equipped with the rear end cap, a serial communication port, the pivot is cavity form and both ends run through, be equipped with the housing shield between rotor and the stator, it is sealed between housing shield one end and the front end housing, sealed between other end and the rear end cap, form the cooling chamber between housing shield and front end housing and the rear end cap, set up the connecting hole of a plurality of intercommunication pump chambers and cooling chamber on the front end housing.

The impeller assembly generates negative pressure in the rotation process, water is sucked into the pump cavity through the water inlet pipe, the pump cavity and the impeller assembly are filled with water, in the water sucking process, the rotating shaft is arranged in a hollow mode, part of water sucked into the pump cavity can enter the shell along the rotating shaft, the inflowing water enters the shielding sleeve and absorbs heat dissipated by the rotor when the rotor rotates in the cooling cavity, the rotor is cooled, one end of the shielding sleeve is abutted against the front end cover, the other end of the shielding sleeve is abutted against the rear end cover, the cooling cavity in the shielding sleeve is in a sealed state when two ends of the shielding sleeve are abutted against, the water in the cooling cavity cannot seep out of the shielding sleeve through a gap to cause short circuit or other faults to a coil on the stator, the self-sucking water can finally flow out through the water outlet pipe, when the pump cavity is filled with water and is discharged through the water outlet pipe, the water in the cooling cavity, the water for cooling can not be wasted, and the follow-up water source can continuously enter the cooling cavity through the rotating shaft, so that the water has the characteristic of fluidity, and the rotor cooling effect of the motor in the self-sucking pump is better.

In foretell self priming pump, the tip that the pivot is close to the rear end cap is equipped with the annular connecting block of circle, the connecting block inserts in the rear end cap, and can the rear end cap internal rotation, the outside extension of rear end cap one end lateral wall forms and supports and lean on the portion, support to be equipped with sealing washer one on the portion, shield cover one end supports and leans on to support and press from both sides sealing washer one on the rear end cap lateral wall.

The circular connecting block at one end of the rotating shaft is directly inserted into the rear end cover, when the rotating shaft rotates, the connecting block can rotate in the rear end cover, so that the components such as bearings are reduced, the structure is more compact, and in the rotating process of the rotating shaft, the shaking may occur unstably, the rotation of the rotating shaft is more stable through the matching of the connecting block and the rear end cover, and the splicing part of the rear end cover and the connecting block is provided with a gap, water flowing to the cooling cavity in the shielding sleeve can flow out through the gap, in the flowing process of water, the water can also play a role in lubricating the connecting block and the rear end cover to prevent the blocking phenomenon between the connecting block and the rear end cover, the side wall of the rear end cover extends outwards to form a butting part, a first sealing ring is arranged on the butting part, when one end of the shielding sleeve butts against the surface of the butting part, the inside wall of housing can be with a sealing washer chucking on the lateral wall of rear end cap, has improved the sealed effect in sealed chamber, prevents that water from flowing through the gap.

In foretell self priming pump, be equipped with the step hole in the rear end cap, step hole one end is equipped with the sealing member, it is downthehole that the pivot is inserted the step, the clearance has between connecting block and the step hole step face, it has a plurality of logical grooves to open on the rear end cap inside wall, the inside through-hole of pivot passes through clearance and step hole intercommunication, the step hole passes through the clearance and leads to the groove intercommunication, lead to groove and cooling chamber intercommunication.

Water in the rotating shaft flows out through a gap between the connecting block and the rear end cover, the speed of water flowing into the cooling cavity of the shielding sleeve is too low probably due to the fact that the gap is too small, the water in the cooling cavity flows fully in the subsequent use process, the cooling effect of the rotor is greatly reduced, therefore, a plurality of through grooves are formed in the inner side wall of the rear end cover, step holes are further formed in the rear end cover, one end of each through groove is plugged through a sealing piece, the rotating shaft is inserted into the other end of the through groove, gaps are formed between the connecting block and the step holes, the water can flow into the step holes from the rotating shaft and then flows out from the gaps, and finally flows into the cooling cavity through the through grooves, on the one hand, the operation between the connecting block and the rear end cover is not influenced, on the other hand, the.

In foretell self priming pump, the protruding step face one and the step face two that form of front end housing one end, be equipped with sealing washer two on the step face two, the housing other end supports with step face one and leans on, and presss from both sides sealing washer two tightly on front end housing one end lateral wall.

The other end of the shielding sleeve is abutted against the first step face of the front end cover, the second sealing ring is arranged on the second step face, when the shielding sleeve is abutted against the first step face, the second sealing ring can be abutted against the side wall of the front end cover by the inner side wall of the shielding sleeve, the second sealing ring can ensure that the shielding sleeve is sealed with one end abutted against the front end cover, and water in a sealing cavity of the shielding sleeve can not flow into a motor through a gap, so that a short circuit or other faults are caused to a coil on a stator, and the first sealing ring is matched with the second sealing ring, so that the effect of a cooling cavity in.

In the self-priming pump, a third sealing ring is arranged between the pump cavity and the front end cover.

And the third pair of front end covers and the pump cavity are sealed, so that water in the first shell is prevented from entering the shell of the motor through a gap between the pump cavity and the front end covers, and short circuits are prevented from being caused to other parts such as an electric wire in the shell.

In the self-priming pump, the shielding case is made of plastic.

When the motor is powered on, the rotor starts to rotate at a high speed to drive the rotating shaft in the stator under the influence of the magnetic field, the shielding sleeve is made of plastic, on one hand, the plastic has higher cost performance and is cheaper, and if the shielding sleeve breaks down, the cost required for replacing and maintaining is not high, and on the other hand, the shielding sleeve made of plastic materials cannot influence the magnetic field between the rotor and the stator.

In the self-priming pump, the outer wall of the impeller set is provided with a through hole for communicating the pump cavity with the impeller set, a separation blade is installed in the pump cavity, and the separation blade can tightly support the through hole when the impeller set rotates.

The through-hole can communicate impeller assembly inside and pump chamber, under usual state, the through-hole intercommunication both make impeller assembly inside internal pressure keep unanimous with the pump chamber, reduce the pressure that internals received, secondly, when impeller assembly begins to rotate, when the impeller rotates and produces the negative pressure and pass through the inlet tube and absorb water, the through-hole also constantly inwards breathes in, the in-process of breathing in, the separation blade can block the through-hole, make the through-hole be in encapsulated situation, make impeller assembly can inhale full water fast and be full of the pump chamber fast, when the water height in the pump chamber does not have the through-hole outside the impeller assembly, internal pressure in the impeller assembly keeps unanimous with the internal pressure in the pump chamber, the separation blade just can.

In the self-priming pump, the rear end cover and the connecting block are made of ceramics.

The connecting block and the rear end cover are required to be soaked in water for a long time, so that the connecting block and the connecting block made of ceramic materials are not corroded, in addition, the ceramic surface is smoother, the friction between the connecting block and the connecting block is smaller under the action of water flow, and the consumed energy is also smaller.

Compared with the prior art, the self-priming pump has the following advantages:

one, this self priming pump's pivot can rotate through impeller assembly, and the sealed intracavity that inwards absorbs water and inhales shield sleeve with some water cools off the rotor, and used water can get back to the pump intracavity through the connecting hole on the front end housing to discharge through the outlet pipe on the pump chamber, the water in the cooling chamber has mobility, and the cooling effect is better

One end of the shielding sleeve and the rear end cover are sealed in a reinforced mode through the first sealing ring, the other end of the shielding sleeve and the front end cover are sealed in a reinforced mode through the second sealing ring, and therefore the sealing performance of the cooling cavity is improved.

Third, epaxial connecting block of commentaries on classics makes self priming pump operation more stable with the rear end cap cooperation, and connecting block and rear end constitute by ceramic material, have the surface smooth, the characteristics that frictional force is little and difficult corrosion, in addition, water outflow pivot back, through logical groove outflow on the rear end cap, water can be lubricated between connecting block and the rear end cap at the in-process that flows.

And the shielding sleeve is made of plastic, so that the influence on the magnetic field between the rotor and the stator is avoided, the cost performance of the shielding sleeve made of plastic is higher, and the cost required by replacement and maintenance is low.

Drawings

Fig. 1 is a first schematic structural diagram of the self-priming pump.

FIG. 2 is a first cross-sectional view of the present self-primer pump.

FIG. 3 is a schematic structural view of a front end cap of the present self-primer pump.

FIG. 4 is a schematic structural view of a rear end cap of the present self-primer pump.

Fig. 5 is an enlarged view at a in fig. 2.

Fig. 6 is an enlarged view at B in fig. 2.

Fig. 7 is a diagram of the method at C in fig. 2.

In the drawings, 1, a pump casing; 2. an impeller assembly; 3. a motor; 4. a pump chamber; 5. a housing; 6. a stator; 7. a rotor; 8. a rotating shaft; 9. a front end cover; 10. a rear end cap; 10a, a stepped hole; 10b, a seal; 11. a shielding sleeve; 12. a cooling chamber; 13. connecting holes; 14. connecting blocks; 15. an abutting portion; 16. a first sealing ring; 17. a through groove; 18. a first step surface; 19. a step surface II; 20. a second sealing ring; 21. a third sealing ring; 22. a through hole; 23. a baffle plate.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1-7, the present self-primer pump comprises: the pump casing 1, the impeller group 2, the motor 3, the pump cavity 4, the casing 5, the stator 6, the rotor 7, the rotating shaft 8, the front end cover 9, the rear end cover 10, the step hole 10a, the sealing piece 10b, the shielding sleeve 11, the cooling cavity 12, the connecting hole 13, the connecting block 14, the abutting part 15, the first sealing ring 16, the through groove 17, the first step surface 18, the second step surface 19, the second sealing ring 20, the third sealing ring 21, the through hole 22 and the blocking piece 23.

As shown in fig. 1-7, the self-priming pump has a housing, a pump chamber 4 and a motor 3 are provided in the pump, the pump housing 1 can protect the pump chamber 4 and the motor 3, etc. in the interior, a water inlet pipe and a water outlet pipe are provided in the pump housing 1 and communicated with the pump chamber 4, an impeller assembly 2 is provided in the pump chamber 4, the impeller assembly 2 is communicated with the water inlet pipe, the motor 3 includes an external housing 5, one end of the housing 5 is provided with a front end cover 9, the other end is provided with a rear end cover 10, one end of the front end cover 9 abuts against the outer wall of one end of the pump chamber 4, a rotor 7 and a stator 6 are provided in the housing 5, the rotor 7 is connected with a hollow rotating shaft 8, one end of the rotating shaft 8 passes through the front end cover 9 and is connected with the impeller assembly 2, and the end connected with the water inlet pipe is close to the other end, a connecting block 14, the shielding sleeve 11 is sleeved outside the rotor 7, one end of the shielding sleeve is tightly abutted against the front end cover 9, the other end of the shielding sleeve is tightly abutted against an abutting part 15 of the rear end cover 10, a sealed cooling cavity 12 is formed between the shielding sleeve 11 and the rotor 7, a step hole 10a is arranged in the rear end cover 10, one end of the step hole 10a is sealed by a sealing piece 10b, the sealing piece 10b can specifically enable one bolt, four through grooves 17 are arranged on the inner side wall of the splicing part of the rear end cover 10 and the connecting block 14, one end of each through groove 17 is communicated with the cooling cavity 12, the other end of each through groove 17 extends downwards, a gap is formed between the connecting block 14 and the step hole 10a, water flowing out through the rotating shaft 8 can flow into the step hole 10a and flow to the cooling cavity 12 through the gap between the step hole 10a and the connecting block 14 and the through grooves 17, four, when the motor 3 is powered on, a magnetic field generated by a coil between the rotor 7 and the stator 6 drives the rotor 7 to rotate, the rotating shaft 8 connected with the rotor 7 also starts to rotate, the rotating shaft 8 drives the impeller set 2 to rotate, centrifugal force generated by rotation of the impeller set 2 can absorb water from the outside through the water inlet pipe, in the process that the water flows to the pump cavity 4, as the rotating shaft 8 is hollow and two ends of the rotating shaft penetrate through, part of the water can be absorbed into the rotating shaft 8 and flows into the shaft shell 5 and flows into the cooling cavity 12 between the shielding sleeve 11 and the rotor 7 through the through groove 17 in the rear end cover 10, and the other part of the water fills the impeller set 2 and the pump cavity 4 along with the rotation of the.

When the pump cavity 4 is filled with water, the water continuously sucked by the impeller set 2 presses out the water in the pump cavity 4 originally through the water outlet pipe, the hollow rotating shaft 8 can suck the water continuously, the water flows into the cooling cavity 12 of the shielding sleeve 11 through the through groove 17 on the rear end cover 10, the water in the cooling cavity 12 of the shielding sleeve 11 originally exists, the water is pressed into the pump cavity 4 through the connecting hole 13 on the front end cover 9, and the water is discharged out of the water outlet pipe along with the water in the pump cavity 4.

The connecting block 14 and the rear end cover 10 are made of ceramics, and the connecting block 14 inserted into the rear end cover 10 is subjected to smaller friction when rotating, so that unnecessary loss of energy is reduced to a certain extent.

The front end cover 9 is raised to form a first step surface 18 and a second step surface 19, one end of the shielding sleeve 11 abuts against the first step surface 18 of the end cover, the other end of the shielding sleeve abuts against the end surface of the abutting part 15, the first sealing ring 16 is arranged on the second step surface 19 of the front end cover 9, the second sealing ring 20 is arranged on the abutting part 15, the shielding sleeve 11 abuts against one end of the first step surface 18, the inner side wall of the front end cover abuts against the first sealing ring 16 on the front end cover 9, the abutting part 15 is provided with the second sealing ring 20, the other end of the shielding sleeve 11 abuts against the abutting part 15 and can abut against the second sealing ring 20 on the outer side wall of the rear end cover 10, the sealing performance of the cooling cavity 12 is ensured through the sealing rings at the two ends, the water in the cooling cavity 12 is prevented from seeping out, the use safety of the motor 3 is ensured, in addition, a third sealing ring 21 is arranged between the front end cover 9 and the first shell body, the sealing rings ensure that in the working process, the water in the first shell can not extend into the machine shell 5 through the gap between the front end cover 9 and the second shell.

The through hole 22 that sets up on the impeller assembly 2 outer wall can be when not using the water pump internal pressure in the better balanced impeller assembly 2, and when impeller assembly 2 during operation, through hole 22 can be constructed and is stopped up by separation blade 23, and the separation blade 23 is firmly inhaled to through hole 22 makes through hole 22 be in the state of being stopped up all the time, and when pump chamber 4 water-logging did not cross the height of through hole 22, the both sides internal pressure reached unanimously, and separation blade 23 just can loosen.

The shielding 11 is made of plastic, the shielding 11 made of plastic is located between the rotor 7 and the stator 6 without any influence on the magnetic field between the rotor 7 and the stator 6, and the plastic material is high in cost performance and relatively cheap.

When the self-priming pump starts to work, the motor 3 is powered on, a magnetic field is generated between the inner rotor 7 and the stator 6, the rotor 7 rotates and drives the rotating shaft 8 to rotate, the rotating shaft 8 drives the impeller assembly 2 in the pump cavity 4 to rotate, the impeller assembly 2 sucks water inwards when rotating, so that an external water source is sucked into the pump cavity 4 through the water inlet pipe, a small part of water flows into a step hole 10a in the rear end cover 10 through the rotating shaft 8 in the suction process, flows out through a gap between the step hole 10a and the connecting block 14 and flows into the cooling cavity 12 between the shielding sleeve 11 and the rotor 7 through the through groove 17, when the pump cavity 4 is filled with water, the water pressure in the cooling cavity 12 and the shell tends to be the same, the water in the cooling cavity 12 can cool the rotor 7, the motor 3 continues to work, the impeller assembly 2 continues to rotate and suck water inwards, the water continuously enters the cooling cavity 12 through the rotating shaft 8, and the water flowing in the original cooling cavity 12 is pressed out of the cooling cavity 12 through, mixing with the water in the pump chamber 4 and the water in the pump chamber 4 is discharged through the outlet pipe also in the pump chamber 4.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although the terms of the cabinet 5, the rotary shaft 8, the front cover 9, the rear cover 10, the stepped hole 10, the seal member 10b, the shield sleeve 11, the cooling chamber 12, the connecting hole 13, the connecting block 14, the abutting portion 15, the through groove 17, the first stepped surface 18, the second stepped surface 19, and the like are used more frequently herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Claims

1. A self-priming pump comprises a pump shell (1), an impeller group (2) and a motor (3), wherein a pump cavity (4) is arranged in the pump shell (1), the impeller set (2) is arranged in the pump cavity (4), the motor (3) comprises a casing (5), a stator (6), a rotor (7) and a rotating shaft (8), one end of the shell (5) is provided with a front end cover (9), the other end is provided with a rear end cover (10), it is characterized in that the rotating shaft (8) is hollow and two ends of the rotating shaft penetrate through the rotating shaft, a shielding sleeve (11) is arranged between the rotor (7) and the stator (6), one end of the shielding sleeve (11) is sealed with the front end cover (9), the other end is sealed with the rear end cover (10), a cooling cavity (12) is formed among the shielding sleeve, the front end cover (9) and the rear end cover (10), the front end cover (9) is provided with a plurality of connecting holes (13) for communicating the pump cavity (4) with the cooling cavity (12).

2. The self-priming pump of claim 1, wherein the end of the rotating shaft (8) close to the rear end cover (10) is provided with a circular connecting block (14), the connecting block (14) is inserted into the rear end cover (10) and can rotate in the rear end cover (10), the outer side wall of one end of the rear end cover (10) extends outwards to form a first abutting portion (15), the first abutting portion (15) is provided with a first sealing ring (16), and one end of the shielding sleeve (11) abuts against the first abutting portion (15) and clamps the first sealing ring (16) on the outer side wall of the rear end cover (10).

3. The self-priming pump of claim 2, wherein a stepped hole (10a) is formed in the rear end cover (10), a sealing member (10b) is arranged at one end of the stepped hole (10a), the rotating shaft (8) is inserted into the stepped hole (10a), a gap is formed between the connecting block (14) and the stepped surface of the stepped hole (10a), a plurality of through grooves (17) are formed in the inner side wall of the rear end cover (10), the through hole in the rotating shaft (8) is communicated with the stepped hole (10a) through the gap, the stepped hole (10a) is communicated with the through grooves (17) through the gap, and the through grooves (17) are communicated with the cooling cavity (12).

4. The self-priming pump of claim 1, wherein one end of the front end cover (9) is protruded to form a first step surface (18) and a second step surface (19), the second step surface (19) is provided with a second sealing ring (20), the other end of the shielding sleeve (11) abuts against the first step surface (18), and the second sealing ring (20) is clamped on the side wall of one end of the front end cover (9).

5. The self-primer pump of claim 4 wherein a third seal ring (21) is disposed between the pump chamber (4) and the front end cap (9).

6. The self-primer pump of claim 1 or 4 wherein said shield (11) is constructed of plastic.

7. The self-priming pump of claim 1, wherein the outer wall of the impeller assembly (2) is provided with a through hole (22) for communicating the pump cavity (4) with the impeller assembly (2), a baffle (23) is installed in the pump cavity (4), and the baffle (23) can abut against the through hole (22) when the impeller assembly (2) rotates.

8. The self-primer pump of claim 3 wherein the rear end cap (10) and the connector block (14) are constructed of ceramic.