CN221857006U - Water-proof centrifugal water pump - Google Patents

Abstract

The application relates to the field of pump body design, and provides a waterproof centrifugal water pump which comprises a shell component, a rotating shaft, an impeller and a magnetic driving component; the inside of the shell component is provided with a centrifugal cavity and an inner mounting cavity, and the impeller is rotationally arranged in the centrifugal cavity; the rotating shaft is rotatably arranged in the inner mounting cavity, and the end part of the rotating shaft is fixedly connected with the impeller; the fixed cover in periphery side of pivot is equipped with the bearing seal, and the bearing seal shutoff is in the port position of interior installation cavity. Based on this, can reduce the circumstances that magnet or stator coil contacted with the liquid of infiltration, reduce the possibility that the magnetic drive subassembly appears corrosion to ensure centrifugal water pump's normal use.

Description

Water-proof centrifugal water pump

Technical Field

The application relates to the field of pump body design, in particular to a water-proof centrifugal water pump.

Background

The miniature centrifugal water pump has the characteristics of small volume and large flow, and is widely applied to sewage sampling, large-flow liquid transfer and low-noise continuous working occasions.

The existing miniature centrifugal water pump mainly comprises a shell, a magnetic drive assembly, a rotating shaft and an impeller, wherein a driving cavity and a centrifugal cavity are formed in the shell, the impeller is arranged in the centrifugal cavity, a water inlet and a water outlet are formed in the outer side of the shell, and the water inlet and the water outlet are respectively communicated with the centrifugal cavity; the rotating shaft is rotatably arranged in the driving cavity, and the end part of the rotating shaft penetrates through the centrifugal cavity and is connected with the impeller. The magnetic drive assembly comprises a stator coil and a magnet, the magnet is fixedly sleeved on the outer peripheral side of the rotating shaft, the stator coil is fixedly arranged on the outer peripheral side of the magnet, when the stator coil is electrified, the magnet and the rotating shaft connected with the magnet can be forced to rotate together through electromagnetic induction, and then the impeller is driven to rotate, so that liquid can be pumped and transferred smoothly.

However, when liquid enters the centrifugal cavity, the liquid can enter the driving cavity through a gap between the rotating shaft and the shell, so that the magnet or the stator coil is easy to rust, and further the rotation of the rotating shaft is interfered or blocked, thereby affecting the normal use of the centrifugal water pump and needing improvement.

Disclosure of utility model

Based on the structure, the application provides the waterproof centrifugal water pump, which can reduce the contact condition of a magnet or a stator coil and permeated liquid, and reduce the possibility of rust of a magnetic drive assembly so as to ensure the normal use of the centrifugal water pump.

The application provides a water-proof centrifugal water pump which adopts the following technical scheme:

A water-proof centrifugal water pump comprises a shell component, a rotating shaft, an impeller and a magnetic driving component; the inside of the shell component is provided with a centrifugal cavity and an inner mounting cavity, and the impeller is rotationally arranged in the centrifugal cavity; the rotating shaft is rotatably arranged in the inner mounting cavity, and the end part of the rotating shaft is fixedly connected with the impeller; the fixed cover in periphery side of pivot is equipped with the bearing seal, and the bearing seal shutoff is in the port position of interior installation cavity.

By adopting the technical scheme, the shaft seal sleeved on the periphery of the rotating shaft is arranged, the shaft seal is blocked at the port position of the inner installation cavity, the sealing and waterproof effects between the centrifugal cavity and the inner installation cavity are improved, the condition that liquid permeates into the inner installation cavity when entering the centrifugal cavity can be reduced, the possibility of rusting of the magnetic drive assembly is reduced, and the normal use of the centrifugal water pump is ensured.

Optionally, a sleeve groove is formed in the side face of the impeller, and the end portion of the rotating shaft is tightly inserted into the sleeve groove.

Through adopting foretell technical scheme, after the impeller passes through the cover groove cover and locates the pivot, closely connect the cooperation between impeller and the pivot has the convenient advantage of installation, is favorable to the quick assembly shaping of this centrifugal water pump.

Optionally, the sleeve groove is a through groove penetrating through two opposite sides of the impeller, and the rotating shaft is matched and penetrated in the sleeve groove; the outer periphery side of the rotating shaft is fixedly sleeved with a clamp spring for positioning the impeller.

Through adopting foretell technical scheme, through making the pivot wear to locate the impeller, utilize jump ring location impeller in epaxial position of pivot, can improve the axial runout condition of this centrifugal pump during operation impeller, ensure the steady pumping of this centrifugal pump during operation liquid.

Optionally, a sealing rubber ring is fixedly sleeved on the outer peripheral side of the rotating shaft, and the sealing rubber ring is positioned between the impeller and the clamp spring.

Through adopting foretell technical scheme, the sealed effect in clearance between impeller and the pivot can be improved in the setting of sealed rubber ring, also can reduce the inside condition of installation cavity in the liquid infiltration, reduces the possibility that the corrosion appears in the magnetic drive subassembly.

Optionally, the housing assembly comprises a stator seat and a volute casing connected with the stator seat in a matching way, the centrifugal cavity is arranged on the side surface of the volute casing, which is close to the stator seat, and the inner mounting cavity is arranged on the side surface of the stator seat, which is close to the volute casing; the end opening of the inner mounting cavity is fixedly embedded with a baffle plate, and the shaft seal is abutted against the side surface of the baffle plate, which is far away from the volute.

Through adopting foretell technical scheme, at centrifugal pump's concrete tissue in-process, through rotating the pivot and installing in interior installation cavity, after the port position in interior installation cavity is located in the pivot and shutoff to the bearing seal cover, establishes baffle and spiral case in proper order and be fixed in the pivot, is fixed in the stator seat with the spiral case again at last, can accomplish the integrated into one piece of this centrifugal pump fast.

Optionally, the magnetic drive assembly includes a magnet, a stator coil, and a drive plate; the magnet is fixedly arranged on the outer peripheral side of the rotating shaft, and the magnet and the rotating shaft are in circumferential linkage; an outer mounting cavity is formed in the side surface, away from the volute, of the stator seat, and the driving plate and the stator coil are both mounted in the outer mounting cavity; the stator coil is fixedly connected to the driving plate, and the driving plate is electrically connected with an external power supply and is used for supplying power to the stator coil.

By adopting the technical scheme, the magnet is fixed with the rotating shaft, the stator coil is fixed in the outer mounting cavity, the stator coil is powered by the driving plate, and the magnetic field generated by the stator coil can force the magnet to rotate so as to drive the rotating shaft and the impeller connected with the rotating shaft to rotate circumferentially, so that the centrifugal water pump works to pump liquid.

Optionally, the magnet is in a circular ring shape, the inner diameter of the magnet is larger than the outer diameter of the rotating shaft, and the magnet and the rotating shaft are coaxially arranged; and an integrally glue-filled sealing rubber sleeve is arranged between the magnet and the rotating shaft.

By adopting the technical scheme, when the magnet and the rotating shaft are installed, the magnet is sleeved on the outer peripheral side of the rotating shaft in an empty mode, and then plastic liquid is poured between the magnet and the rotating shaft to solidify the magnet and the rotating shaft to form a sealing rubber sleeve, so that the magnet and the rotating shaft can be firmly connected to form an integral structure; and compared with the way that the magnet is directly and tightly sleeved on the rotating shaft, the assembly mode can avoid damage caused by mutual contact between the magnet and the rotating shaft, ensure that the perpendicularity error of the rotating shaft is kept in a qualified range, and ensure that the centrifugal water pump has good mechanical life.

Optionally, a plastic sealing layer is formed in the outer mounting cavity by glue filling.

Through adopting foretell technical scheme, install stator coil and drive plate outside after the installation cavity, outside install the intracavity and pour into plastic liquid and make it solidify and form the plastic sealing layer, the plastic sealing layer can play fixed and the effect of protection to inside components and parts for stator coil and drive plate have good mechanical life, and then make centrifugal water pump keep good mechanical life.

Optionally, a water-stop plate is arranged between the shaft seal and the inner mounting cavity, and the water-stop plate is fixed on the inner wall of the inner mounting cavity.

Through adopting foretell technical scheme, the setting of water-stop can further improve the water-proof effects between centrifugal cavity and the interior installation cavity to further reduce the condition of installation cavity in the infiltration of liquid, ensure centrifugal water pump's normal use.

Alternatively, the shaft seal is made of an elastomeric material.

Through adopting foretell technical scheme, make the bearing seal through using elastic material processing, make the bearing seal closely support in the lateral wall of interior installation cavity, can play good sealed, waterproof effect, reduce the possibility of the interior installation cavity of liquid infiltration.

In summary, the present application includes at least one of the following beneficial technical effects:

1. The shaft seal is arranged to be plugged at the port position of the inner mounting cavity, so that the sealing and waterproof effects between the centrifugal cavity and the inner mounting cavity can be improved, the possibility of rust of the magnetic drive assembly is reduced, and the normal use of the centrifugal water pump is ensured;

2. The clamping spring is arranged to position the impeller on the rotating shaft, so that the axial runout condition of the impeller during the operation of the centrifugal water pump can be improved, and the stable pumping of liquid during the operation of the centrifugal water pump is ensured;

3. Through pouring plastic liquid between magnet and pivot and make it solidify and form sealed gum cover, can make firm the connection form overall structure between magnet and the pivot to this assembly method can avoid the damage that leads to the fact because the extrusion contact between the two, ensures that the straightness error of perpendicularity of pivot keeps in qualified within range, makes this centrifugal water pump have good mechanical life.

Drawings

FIG. 1 is a half sectional view of the overall structure in example 1;

FIG. 2 is a half sectional view of the stator base in embodiment 1;

FIG. 3 is an exploded view of the whole structure in example 1

FIG. 4 is a partial cross-sectional view of the overall structure of example 2, mainly showing the structure of the connection position of the impeller and the rotation shaft;

FIG. 5 is an exploded view of the impeller, shaft, circlip, and seal ring of example 2;

FIG. 6 is a half sectional view of the whole structure in example 3;

fig. 7 is a half sectional view of the whole structure in example 4.

Reference numerals illustrate: 1. a stator base; 11. an inner mounting cavity; 111. a first region; 112. a second region; 113. a third region; 114. a fourth region; 115. a baffle ring; 12. an outer mounting cavity; 2. a volute; 21. a centrifugal chamber; 22. a water inlet; 23. a water outlet; 3. a rotating shaft; 31. clamping springs; 32. sealing rubber rings; 33. a bearing; 34. wear-resistant gaskets; 4. an impeller; 41. a sleeve groove; 5. a magnetic drive assembly; 51. a magnet; 52. a stator coil; 53. a driving plate; 6. a shaft sleeve; 61. a ring groove; 7. a plastic sleeve; 8. a partition plate; 9. a shaft seal; 91. and a water stop plate.

Detailed Description

The application is described in further detail below with reference to fig. 1-7.

Example 1:

The embodiment of the application discloses a water-proof centrifugal water pump.

Referring to fig. 1, a water-blocking centrifugal water pump comprises a shell assembly, a rotating shaft 3, an impeller 4 and a magnetic driving assembly 5; the housing assembly comprises a stator seat 1 and a volute casing 2 which is matched and connected with the stator seat, and the volute casing 2 is fixedly connected with one end part of the stator seat 1.

An inner mounting cavity 11 is formed in the side surface, close to the volute 2, of the stator seat 1, the rotating shaft 3 is rotatably arranged in the inner mounting cavity 11, and the end part of the rotating shaft 3 extends into the centrifugal cavity 21; the side of the volute 2, which is close to the stator seat 1, is provided with a centrifugal cavity 21, and the impeller 4 is arranged in the centrifugal cavity 21. The impeller 4 is provided with a sleeve groove 41 on the side surface close to the stator seat 1, the sleeve groove 41 and the impeller 4 are kept coaxial, and the inner diameter of the sleeve groove 41 is equal to the outer diameter of the rotating shaft 3; the end of the rotating shaft 3 can be tightly inserted into the sleeve groove 41, and the two parts are in interference fit, so that the impeller 4 can rotate along with the rotating shaft 3.

In addition, the outer side of the volute 2 is provided with a water inlet 22 and a water outlet 23, and the water inlet 22 and the water outlet 23 are respectively communicated with the centrifugal cavity 21; the liquid can smoothly enter the centrifugal chamber 21 through the water inlet 22 and smoothly exit the centrifugal chamber 21 through the water outlet 23.

Referring to fig. 2, the inner installation chamber 11 in the present embodiment includes a first region 111, a second region 112, a third region 113, and a fourth region 114, which are sequentially disposed from one end of the inner installation chamber 11 remote from the scroll case 2 toward one end of the inner installation chamber 11 near the scroll case 2, the inner diameter of the first region 111 being smaller than the outer diameter of the second region 112.

Referring to fig. 1 to 3, a shaft sleeve 6 is disposed in the first region 111, and a rotation limiting structure is disposed between the shaft sleeve 6 and the inner wall of the first region 111, so as to realize rotation connection between the shaft sleeve 6 and the stator base 1. Specifically, one end of the rotating shaft 3 is inserted into the inner ring of the shaft sleeve 6, and the rotating shaft 3 and the shaft sleeve 6 are in interference fit, so that the rotating shaft 3 can be driven to rotate together by the rotation of the shaft sleeve 6, and further the rotating connection between the rotating shaft 3 and the stator seat 1 is realized.

It should be noted that, the rotation limiting structure of the present embodiment includes a baffle ring 115 and a ring groove 61 engaged with the baffle ring 115, the baffle ring 115 is integrally formed on the inner wall of the first region 111, and the ring groove 61 is opened on the outer peripheral surface of the shaft sleeve 6; through the cooperation of the baffle ring 115 and the ring groove 61, the shaft sleeve 6 can rotate around the central axis of the shaft sleeve 6 and simultaneously limit the axial movement of the shaft sleeve 6, thereby limiting the axial movement of the rotating shaft 3.

The inner diameter of the second region 112 is smaller than the inner diameter of the third region 113; the driving assembly comprises a magnet 51, a stator coil 52 and a driving plate 53, wherein the magnet 51 is arranged in a circular shape, and the inner diameter of the magnet 51 is larger than the outer diameter of the rotating shaft 3; in the present embodiment, the magnet 51 is located inside the second region 112, and the magnet 51 is disposed on the outer peripheral side of the rotating shaft 3 in a hollow manner; and, be equipped with integrative encapsulating fashioned plastic cover 7 between magnet 51 and the pivot 3, the setting of plastic cover 7 can make the circumference linkage between magnet 51 and the pivot 3, and the pivot 3 can rotate with magnet 51 promptly.

Before the spindle 3 is installed in the inner installation cavity 11 in a specific assembly process, the spindle 3 and the magnet 51 are placed into a customized mold together, so that the spindle 3 and the magnet 51 are kept coaxial, then plastic liquid is poured into the mold, the plastic liquid is solidified to form a plastic sleeve 7, and the spindle 3 can rotate along with the magnet 51 through the plastic sleeve 7.

An outer mounting cavity 12 is formed in the side surface, far away from the volute casing 2, of the stator seat 1, and the stator coil 52 and the driving plate 53 are both mounted in the outer mounting cavity 12; the stator coil 52 is located on the outer peripheral side of the magnet 51, and is kept coaxial therebetween. The driving plate 53 is fixed with the stator coil 52, and the driving plate 53 is electrically connected with an external power supply; the external power supply supplies power to the stator coil 52 through the driving plate 53, a magnetic field can be generated around the stator coil 52 after the power is supplied, and the magnet 51 can be forced to rotate through electromagnetic induction, so that the rotating shaft 3 and the impeller 4 are smoothly driven to rotate, and the normal liquid pumping function of the centrifugal water pump is realized.

In addition, a plastic sealing layer (not shown) is molded in the outer mounting cavity 12 for fixing and protecting the stator coil 52 and the driving plate 53. In a specific assembly process, after the stator coil 52 is mounted in the outer mounting cavity 12 by the driving plate 53, plastic liquid is poured into the outer mounting cavity 12 to fill the outer mounting cavity 12, at this time, the plastic liquid can wrap the stator coil 52 and the driving plate 53, and after the plastic liquid is solidified, a plastic sealing layer is formed.

The inner diameter of the third region 113 is smaller than the inner diameter of the fourth region 114; a partition plate 8 is arranged in the fourth region 114 in a matching way, the partition plate 8 is provided with a through port, and one end of the rotating shaft 3, which is far away from the shaft sleeve 6, passes through the through port in a matching way and is connected with the impeller 4; moreover, when the volute casing 2 is fixedly connected to the stator base 1, the volute casing 2 can partially abut against the partition plate 8, so that the partition plate 8 is stably installed in the fourth area 114. The provision of the partition 8 serves to separate the centrifugal chamber 21 from the inner mounting chamber 11, reducing the likelihood of liquid entering the inner mounting chamber 11 directly into contact with the magnet 51, and reducing the likelihood of rust on the magnet 51.

In addition, a shaft seal 9 is fixedly sleeved on the outer periphery side of the rotating shaft 3, and the shaft seal 9 is positioned in the third area 113; the shaft seal 9 in this embodiment is made of elastic materials such as silica gel or rubber, so that the shaft seal 9 can be tightly installed inside the third area 113, and the end surface of the shaft seal 9 can be tightly abutted against the side surface of the baffle plate 8 away from the volute 2, thereby improving the sealing and waterproof effects between the centrifugal cavity 21 and the inner installation cavity 11, and further reducing the possibility of liquid penetrating into the inner installation cavity 11.

The implementation principle of the embodiment 1 of the application is as follows:

According to the embodiment, the shaft seal 9 sleeved on the outer peripheral side of the rotating shaft 3 is arranged, so that the shaft seal 9 is blocked in the third area 113, namely, the port position of the inner installation cavity 11, the sealing and waterproof effects between the centrifugal cavity 21 and the inner installation cavity 11 are improved, the condition that liquid permeates into the inner installation cavity 11 when liquid enters the centrifugal cavity 21 is reduced, the possibility that the magnetic drive assembly 5 is corroded is reduced, and the normal use of the centrifugal water pump is ensured.

Example 2:

The embodiment of the application discloses a water-proof centrifugal water pump.

Referring to fig. 4, in the water-blocking centrifugal water pump disclosed in the embodiment of the present application, the other components are the same as those in embodiment 1, and are not described in detail here; the difference from embodiment 1 is that the sleeve groove 41 in this embodiment is a through groove axially penetrating through two opposite sides of the impeller 4, the rotating shaft 3 is matched with and penetrates through the sleeve groove 41, and one end of the rotating shaft 3 far away from the shaft sleeve 6 can be partially exposed out of the impeller 4.

Referring to fig. 5, the outer peripheral surface of the rotating shaft 3 is fixedly sleeved with a clamp spring 31, and the clamp spring 31 is positioned on the side surface of the impeller 4 away from the stator seat 1, so that the position of the impeller 4 on the rotating shaft 3 can be positioned; in addition, the outer periphery side of the rotating shaft 3 is fixedly sleeved with a sealing rubber ring 32, the sealing rubber ring 32 is positioned between the impeller 4 and the clamp spring 31, sealing and waterproof effects between the rotating shaft 3 and the sleeve groove 41 can be improved, and the possibility of liquid penetrating into the inner mounting cavity 11 is reduced.

The implementation principle of the embodiment 2 of the application is as follows:

When the centrifugal water pump of the embodiment is assembled, the rotating shaft 3 is arranged through the impeller 4 in a penetrating way, the position of the impeller 4 on the rotating shaft 3 is positioned by the clamp spring 31, the axial runout condition of the impeller 4 during the operation of the centrifugal water pump can be improved, and the stable pumping of liquid during the operation of the centrifugal water pump is ensured.

Example 3:

The embodiment of the application discloses a water-proof centrifugal water pump.

Referring to fig. 6, the water-blocking centrifugal water pump disclosed in the embodiment of the application has the same corresponding components as those in embodiment 2, and the details are not repeated here; the difference from the embodiment 2 is that the side surface of the partition plate 8, which is close to the volute 2, is provided with a caulking groove, and the impeller 4 is embedded in the caulking groove in a matching way; the design can effectively reduce the volume of the centrifugal cavity 21, so that the miniature centrifugal water pump has smaller volume, thereby being convenient for the application of the centrifugal water pump in certain narrow spaces.

A water stop plate 91 is arranged between the shaft seal 9 and the inner mounting cavity 11, and the water stop plate 91 in the embodiment is matched and embedded in the third area 113 and is fixed with the inner peripheral wall of the third area 113, so as to further enhance the waterproof capability between the centrifugal cavity 21 and the inner mounting cavity 11; the shaft seal 9 is embedded in the water stop 91, which can play a second mode effect and reduce the occurrence of the condition that liquid permeates into the inner mounting cavity 11 from the gap between the rotating shaft 3 and the partition plate 8.

In addition, the side surface of the water stop plate 91 far away from the partition plate 8 is embedded with a bearing 33, and the rotating shaft 3 is arranged on the peripheral side in a penetrating manner and is rotationally connected with the bearing 33; through the cooperation of bearing 33 and axle sleeve 6, can improve the stability when pivot 3 rotates, ensure the stationarity when centrifugal water pump works.

Example 4:

The embodiment of the application discloses a water-proof centrifugal water pump.

Referring to fig. 6, the water-blocking centrifugal water pump disclosed in the embodiment of the application has the same corresponding components as those in embodiment 2, and the details are not repeated here; the difference from embodiment 2 is that the rotating shaft 3 in this embodiment is sleeved with two wear-resistant gaskets 34, and the two wear-resistant gaskets 34 are respectively abutted against two ends of the plastic sleeve 7 for positioning the magnet 51, and can reduce the wear on two ends of the plastic sleeve 7, so as to improve the service life of the centrifugal water pump.

The above is a preferred embodiment of the present application, and is not intended to limit the scope of the present application in this way, therefore: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.

Claims (10)

1. The utility model provides a waterproof type centrifugal water pump, includes casing subassembly, pivot (3), impeller (4) and magnetic drive subassembly (5), its characterized in that: a centrifugal cavity (21) and an inner mounting cavity (11) are arranged in the shell assembly, and the impeller (4) is arranged in the centrifugal cavity (21); the rotating shaft (3) is rotatably arranged in the inner mounting cavity (11), and the end part of the rotating shaft (3) is fixedly connected with the impeller (4); the shaft seal (9) is fixedly sleeved on the outer peripheral side of the rotating shaft (3), and the shaft seal (9) is blocked at the port position of the inner mounting cavity (11).

2. The water-resistant centrifugal water pump according to claim 1, wherein: the side of the impeller (4) is provided with a sleeve groove (41), and the end part of the rotating shaft (3) is tightly inserted into the sleeve groove (41).

3. The water-resistant centrifugal water pump according to claim 2, wherein: the sleeve groove (41) is a through groove penetrating through two opposite sides of the impeller (4), and the rotating shaft (3) is matched and penetrated in the sleeve groove (41); the outer peripheral side of the rotating shaft (3) is fixedly sleeved with a clamp spring (31) for positioning the impeller (4).

4. A water-barrier centrifugal water pump according to claim 3, wherein: the outer periphery side of the rotating shaft (3) is fixedly sleeved with a sealing rubber ring (32), and the sealing rubber ring (32) is positioned between the impeller (4) and the clamp spring (31).

5. The water-resistant centrifugal water pump according to claim 1, wherein: the shell assembly comprises a stator seat (1) and a volute (2) which is connected with the stator seat in a matching way, the centrifugal cavity (21) is formed in the side face of the volute (2) close to the stator seat (1), and the inner mounting cavity (11) is formed in the side face of the stator seat (1) close to the volute (2); the end opening of the inner mounting cavity (11) is fixedly embedded with a baffle plate (8), and the shaft seal (9) is abutted against the side surface, far away from the volute (2), of the baffle plate (8).

6. The water-resistant centrifugal water pump according to claim 5, wherein: the magnetic drive assembly (5) comprises a magnet (51), a stator coil (52) and a drive plate (53); the magnet (51) is fixedly arranged on the outer peripheral side of the rotating shaft (3), and the magnet (51) and the rotating shaft (3) are in circumferential linkage;

An outer mounting cavity (12) is formed in the side surface, far away from the volute casing (2), of the stator seat (1), and the driving plate (53) and the stator coil (52) are both mounted in the outer mounting cavity (12); the stator coil (52) is fixedly connected to the driving plate (53), and the driving plate (53) is electrically connected with an external power supply and is used for supplying power to the stator coil (52).

7. The water-resistant centrifugal water pump according to claim 6, wherein: the magnet (51) is arranged in a circular ring shape, the inner diameter of the magnet (51) is larger than the outer diameter of the rotating shaft (3), and the magnet and the rotating shaft are coaxially arranged; an integrated glue-pouring plastic sleeve (7) is arranged between the magnet (51) and the rotating shaft (3).

8. The water-resistant centrifugal water pump according to claim 6, wherein: and a plastic sealing layer is formed in the outer mounting cavity (12) by glue filling.

9. The water-resistant centrifugal water pump according to claim 1, wherein: a water stop plate (91) is arranged between the shaft seal (9) and the inner mounting cavity (11), and the water stop plate (91) is fixed on the inner wall of the inner mounting cavity (11).

10. The water-resistant centrifugal water pump according to claim 1, wherein: the shaft seal (9) is made of an elastic material.