CN220059995U

CN220059995U - Integrated shielding sleeve

Info

Publication number: CN220059995U
Application number: CN202321726227.5U
Authority: CN
Inventors: 韩元平; 周万波; 李硕; 汪令捷
Original assignee: Hefei Xinhu Canned Motor Pump Co Ltd
Current assignee: Hefei Xinhu Canned Motor Pump Co Ltd
Priority date: 2023-07-04
Filing date: 2023-07-04
Publication date: 2023-11-21
Anticipated expiration: 2033-07-04

Abstract

The utility model discloses an integrated shielding sleeve, which relates to the technical field of shielding electric pumps, and specifically comprises a middle section, a reinforcing flange and an end surface flange, wherein one end of the middle section is provided with a first transition section, the other end of the first transition section is connected with the end surface flange through a spherical surface, the outer side surface of the end surface flange is provided with at least one circle of sealing ring, and the other end of the middle section is connected with the reinforcing flange through a second transition section. This integral type shield cover is formed by the whole punching press of a corrosion resistant plate, does not have the secondary welding, has cancelled the part of installation bearing for the structure is simpler, has reduced manufacturing cost, and the deflection is little, and dimensional accuracy is high, and has cancelled the bearing position that is located the shield cover terminal in the current design, has reduced because of the shield cover size is out of tolerance causes rotor concentricity poor, and then leads to vibration, the noise grow's of pump phenomenon.

Description

Integrated shielding sleeve

Technical Field

The utility model relates to the technical field of shielded electric pumps, in particular to an integrated shielding sleeve.

Background

The shielding pump eliminates the rotary shaft seal device of the traditional centrifugal pump due to the self structural characteristics, and is widely applied to the transportation of corrosive, inflammable, explosive or toxic liquid in hot water circulation, domestic cold water pressurization, refrigeration systems and chemical devices by virtue of the excellent performances of compact structure, small vibration and noise, safety, no leakage and the like. The shielding sleeve is used as a key component for isolating water from a motor in the shielding pump, the quality of the shielding sleeve directly influences the service life of the shielding electric pump, the shielding sleeve is one of the most important parts in the whole shielding pump structure, and the shielding sleeve with high strength and safety and reliability is the subject of important research.

In the prior art, one structure of the shielding sleeve is that a front end flange, a middle sleeve and a rear end bearing seat are welded together, when the shielding sleeve with the structure is used, a rear bearing of a shielding pump is arranged on a rear end bearing seat of the shielding sleeve, and the shielding sleeve not only bears the function of isolating water in the pump and a motor, but also plays a role of a bearing position. However, the shielding sleeve with the structure has the following defects in use: the three-section welded shielding sleeve cannot be processed after being welded, so that the dimensional tolerance and the form and position tolerance of parts cannot be guaranteed, particularly, the form and position tolerance gap of a bearing on the shielding sleeve is larger, the bearing cannot meet the technical requirements after being installed, the vibration and the noise are larger when the whole pump operates, the middle section of the shielding sleeve is deformed greatly after being welded, and a larger gap is generated after the middle section of the shielding sleeve is assembled with a motor stator, so that the noise problem is also caused to the pump; the three-section welding type shielding sleeve has a plurality of procedures and high cost.

Disclosure of Invention

The utility model provides an integrated shielding sleeve, which solves the problems that the three-section welding type shielding sleeve provided in the background art cannot ensure dimensional tolerance and form and position tolerance due to a processing mode, and further causes vibration and noise of a shielding pump to become large.

The utility model provides the following technical scheme: the integral shielding sleeve is formed by integrally stamping a stainless steel plate, a bearing position at the tail end of the shielding sleeve in the existing design is eliminated, the structure is simple, the processing difficulty is low, and the phenomenon that the concentricity of a rotor is poor due to the out-of-tolerance size of the shielding sleeve, so that the vibration and noise of a pump are increased is reduced; the water pump is arranged in a gap between the stator and the rotor, so that water flowing into the shielding sleeve is not contacted with a stator coil of the motor, and the pump is prevented from being burnt due to the fact that the stator coil is contacted with water.

The utility model provides an integral type shielding cover, includes interlude, strengthener flange and terminal surface flange, the one end of interlude is equipped with first changeover portion, the other end of first changeover portion passes through spherical surface and terminal surface flange joint, be equipped with at least round sealing ring on the lateral surface of terminal surface flange, the other end of interlude is connected with strengthener flange through the second changeover portion.

Preferably, the sealing ring is in a protruding state on the end face flange, and the height of the sealing ring higher than the end face flange is 0.3-0.5 mm.

Preferably, the spherical surface is spherical, the inner radius of the spherical surface is 60-150 mm, the thickness of the spherical surface is 1-1.5 mm, and the included angle between the spherical surface and the end face flange is 30-40 degrees.

Preferably, the wall thickness of the middle section is 0.2-0.5 mm, the outer circle of the middle section is directly contacted with the inner hole of the stator of the shielding pump, and the wall thickness of the middle section is smaller than the wall thickness of the first transition section and the second transition section.

Preferably, the outer diameter of the reinforcing flange is smaller than that of the middle section, the height of the reinforcing flange is larger than 2mm, the thickness of the reinforcing flange is 1-1.5 mm, and the bullnose radius between the reinforcing flange and the second transition section is not smaller than 2.5mm.

Preferably, the inner diameter of the end face flange is larger than that of the middle section, the first transition section is a concave curved surface, the inner diameter of one end, connected with the middle section, of the first transition section is identical to that of the middle section, and the inner diameter of one end, close to the end face flange, of the first transition section is larger than that of the other end of the first transition section.

Preferably, the outer diameter of one end of the second transition section connected with the middle section is the same as the outer diameter of the middle section, a bullnose is arranged between the two ends of the second transition section, the radius of the bullnose is not less than 2.5mm, and the other end of the second transition section is flush with the end face of the reinforcing flange.

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

1. this integral type shield cover is formed by the whole punching press of a corrosion resistant plate, does not have the secondary welding, has cancelled the part of installation bearing for the structure is simpler, has reduced manufacturing cost, and the deflection is little, and dimensional accuracy is high, and has cancelled the bearing position that is located the shield cover terminal in the current design, has reduced because of the shield cover size is out of tolerance causes rotor concentricity poor, and then leads to vibration, the noise grow's of pump phenomenon.

2. According to the integrated shielding sleeve, through the design of the spherical surface, the bearing strength of the shielding sleeve is increased, the deformation of the shielding sleeve is reduced, the bearing capacity of the shielding sleeve is increased, and the reliability is higher; the shielding sleeve is not deformed due to extrusion of the O-shaped ring through the design of the reinforcing flange; through the setting of sealing ring, increased the leakproofness of rubber pad, prevent to appear leaking.

Drawings

FIG. 1 is a schematic diagram of the front of the structure of the present utility model;

FIG. 2 is an enlarged schematic view of a structural seal ring of the present utility model;

FIG. 3 is a schematic diagram of the structure of the present utility model.

In the figure: 1. a seal ring; 2. spherical surface; 3. a first transition section; 4. an intermediate section; 5. reinforcing the flange; 6. an end face flange; 7. a second transition section; 10. a shielding sleeve; 11. a rubber pad; 12. a base; 13. and a rear bearing seat.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The present utility model provides an embodiment: the integral shielding sleeve is formed by integrally stamping a stainless steel plate, the bearing position at the tail end of the shielding sleeve in the existing design is eliminated, the structure is simple, the processing difficulty is small, the phenomenon that the concentricity of a rotor is poor due to the out-of-tolerance size of the shielding sleeve, and further the vibration and noise of a pump are increased is reduced, the wall thickness of the shielding sleeve is 1-1.5 mm at the place with the largest wall thickness, and the wall thickness of the shielding sleeve is 0.2-0.5 mm at the place with the thinnest wall thickness.

The integrated shielding sleeve comprises a spherical surface 2, a middle section 4, a reinforcing flange 5 and an end surface flange 6. The end face flange 6 of the shielding sleeve is provided with one or a plurality of rings of sealing rings 1, the sealing rings 1 are positioned on the outer side of the shielding sleeve, the height of the highest point of the sealing rings 1, which is higher than the end face flange 6, is 0.3-0.5 mm, and the sealing rings are generally arc-shaped or triangular, so long as the sealing rings can be higher than the end face flange by 0.3-0.5 mm. When the shielding sleeve is used, the sealing ring 1 is contacted with the rubber gasket 11 in the shielding pump, the sealing ring 1 increases the compression ratio of the rubber gasket 11, improves the tightness, reduces the risk of sealing failure caused by deformation of the end face flange 6 of the shielding sleeve, increases the reliability of the whole machine, simultaneously reduces the planeness requirement of the contact surface of the base 12 of the shielding pump and the shielding sleeve, and reduces the processing difficulty of the base 12 and the shielding sleeve.

The spherical surface 2 is connected with the inner wall of the end face flange 6, the spherical surface 2 is a section with the largest bearing pressure of the whole shielding sleeve, the spherical surface 2 is designed into a sphere, the inner radius R=60-150 mm, the wall thickness of the spherical section is generally 1-1.5 mm where the wall thickness of the shielding sleeve is the largest, the included angle between the spherical surface 2 and the end face flange 6 is controlled to be 30-40 degrees, the reinforcement of the spherical surface 2 is realized, the shielding sleeve basically has no deformation when bearing water pressure, and the maximum bearing pressure of 1.5MPa is realized.

The other end of the spherical surface 2 is connected to the intermediate section 4 via a first transition section 3. The first transition section 3 is an arc concave curved surface, the inner diameter of one end, connected with the middle section 4, of the first transition section 3 is the same as the inner diameter of the middle section 4, the inner diameter of one end, close to the end face flange 6, of the first transition section 3 is larger than the inner diameter of the other end of the first transition section, and the inner walls of all parts of the shielding sleeve are in smooth transition.

The middle section 4 is the thinnest place of the shielding sleeve, the wall thickness is only 0.2-0.5 mm, the excircle of the middle section 4 is directly contacted with the inner hole of the stator, the middle section 4 is integrally formed by stamping together with other sections of the shielding sleeve, the tolerance size of the middle section 4 is ensured by a die, the deformation amount is small, and the precision is high.

The other end of intermediate section 4 is connected with the strengthening flange 5 through second changeover portion 7, and the external diameter of the one end that second changeover portion 7 was connected with intermediate section 4 is the same with the external diameter of intermediate section 4, is equipped with the bullnose between the second changeover portion 7 both ends, and this bullnose's radius is not less than 2.5mm, and the other end of second changeover portion 7 flushes with the terminal surface of strengthening flange 5, and the external diameter of strengthening flange 5 is less than the internal diameter of the other end of second changeover portion 7.

When the shielding sleeve is used, an O-shaped ring groove is designed on the rear bearing seat 13 of the shielding pump, a gap between the shielding sleeve 10 and the rear bearing seat 13 is sealed through an O-shaped ring arranged in the O-shaped ring groove, so that the pump burnout caused by water flowing into the stator in the shielding sleeve is prevented, the O-shaped ring has a sealing effect through extrusion deformation between the rear bearing seat 13 and the shielding sleeve 10, and the second transition section 7 of the shielding sleeve, which is in contact with the O-shaped ring, is subjected to larger stress. In order to prevent the deformation of the shielding sleeve, the tail part of the second transition section 7 is internally lined with a reinforcing flange 5, the reinforcing flange 5 is also integrally formed with other parts in a punching mode, the height is larger than 2mm, the thickness is 1-1.5 mm, and in order to prevent the O-shaped ring from being cut by the sharp parts of the rear bearing seat 13 and the shielding sleeve 10 during installation.

To sum up: when the integrated shielding sleeve is used, as shown in fig. 3, an O-shaped ring groove is designed on a rear bearing seat 13 of a shielding pump, the outer circle of a middle section 4 of the shielding sleeve 10 is directly contacted with an inner hole of a stator, a sealing ring 1 is directly contacted with a rubber pad 11 in the shielding pump, the sealing ring 1 increases the compression rate of the rubber pad 11, the tightness is improved, the risk of sealing failure caused by deformation of an end face flange 6 of the shielding sleeve 10 is reduced, the reliability of the whole machine is improved, the planeness requirement of the contact surface of a machine base 12 and the shielding sleeve 10 is reduced, and the processing difficulty of the machine base 12 and the shielding sleeve 10 is reduced; an O-shaped ring is arranged in the O-shaped ring groove to seal the gap between the shielding sleeve 10 and the rear bearing seat 13, so that the pump is prevented from being burnt due to the fact that water in the shielding sleeve flows into the stator.

Standard parts used in the present utility model can be purchased from the market, the special-shaped parts can be customized according to the descriptions of the specification and the drawings, the specific connection modes of the parts are conventional means such as bolts, rivets, welding and the like which are mature in the prior art, and the machines, the parts and the equipment are conventional models in the prior art, so that details which are not described in detail in the specification belong to the prior art which is well known to the person skilled in the art, and although the embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made in these embodiments without departing from the principle and spirit of the present utility model, and the scope of the present utility model is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides an integral type shielding cover, includes interlude (4), reinforcement flange (5) and terminal surface flange (6), its characterized in that: one end of the middle section (4) is provided with a first transition section (3), the other end of the first transition section (3) is connected with an end face flange (6) through a spherical surface (2), at least one circle of sealing ring (1) is arranged on the outer side face of the end face flange (6), and the other end of the middle section (4) is connected with a reinforcing flange (5) through a second transition section (7).

2. An integrated shield according to claim 1, wherein: the sealing ring (1) is in a protruding state on the end face flange (6), and the height of the sealing ring (1) higher than the end face flange (6) is 0.3-0.5 mm.

3. An integrated shield according to claim 1, wherein: the spherical surface (2) is spherical, the inner radius of the spherical surface (2) is 60-150 mm, the thickness of the spherical surface (2) is 1-1.5 mm, and the included angle between the spherical surface (2) and the end face flange (6) is 30-40 degrees.

4. An integrated shield according to claim 1, wherein: the wall thickness of the middle section (4) is 0.2-0.5 mm, the outer circle of the middle section (4) is directly contacted with the inner hole of the stator of the shielding pump, and the wall thickness of the middle section (4) is smaller than the wall thickness of the first transition section (3) and the second transition section (7).

5. An integrated shield according to claim 1, wherein: the outer diameter of the reinforcing flange (5) is smaller than that of the middle section (4), the height of the reinforcing flange (5) is larger than 2mm, the thickness of the reinforcing flange is 1-1.5 mm, and the bullnose radius between the reinforcing flange (5) and the second transition section (7) is not smaller than 2.5mm.

6. An integrated shield according to claim 1, wherein: the inner diameter of the end face flange (6) is larger than that of the middle section (4), the first transition section (3) is of a concave curved surface, the inner diameter of one end, connected with the middle section (4), of the first transition section (3) is identical to that of the middle section (4), and the inner diameter of one end, close to the end face flange (6), of the first transition section (3) is larger than that of the other end of the first transition section.

7. An integrated shield according to claim 1, wherein: the external diameter of one end that second changeover portion (7) is connected with interlude (4) is the same with the external diameter of interlude (4), be equipped with the bullnose between second changeover portion (7) both ends, the radius of this bullnose is not less than 2.5mm, just the other end of second changeover portion (7) flushes with the terminal surface of strengthening flange (5).