CN115773256A

CN115773256A - Magnetic shielding pump

Info

Publication number: CN115773256A
Application number: CN202211632169.XA
Authority: CN
Inventors: 张睿杰; 汪家琼
Original assignee: Jiangsu University
Current assignee: Jiangsu University
Priority date: 2022-12-19
Filing date: 2022-12-19
Publication date: 2023-03-10

Abstract

The invention provides a magnetic shielding pump which comprises a pump body, an intermediate body, a motor shell, a motor stator, a motor rotor and a hollow shaft, wherein the motor stator and the motor rotor are arranged inside the motor shell, and the intermediate body and the motor shell are connected with the pump body through bolts; the hollow shaft is supported in the middle body, one end of the hollow shaft extends into the pump body and is connected with the impeller, and the other end of the hollow shaft is positioned in the motor shell and is connected with the motor rotor; be equipped with the separation sleeve between electric motor rotor and the motor stator, the separation sleeve passes through the screw connection midbody, the separation sleeve outside is located to the motor stator cover, just the motor stator inboard leaves the clearance with the separation sleeve outside. Through setting up independent spacer sleeve, avoided the welding at the spacer sleeve in the motor stator outside, make things convenient for the dismantlement of daily work time to overhaul.

Description

Magnetic shielding pump

Technical Field

The invention relates to the field of pumps, in particular to a magnetic shielding pump.

Background

Cooling pumps in the fields of aviation, aerospace, vehicles and electronic systems are required to be safe, reliable, small and lightweight. The motor and the pump head of the traditional canned motor pump are designed coaxially, the middle part of the canned motor pump is free of a coupler, shaft seal leakage is avoided, the canned motor pump is safe and reliable, and compared with other centrifugal pumps, the canned motor pump is compact in structure and is a relatively optimal pump type, but the traditional canned motor pump still cannot meet the higher requirements of certain special fields on light weight and small size. In addition, the conventional canned motor pump has a canned motor jacket welded to the outside of the motor stator to ensure insulation between the stator winding and the rotor and not corroded by the conveyed medium, and this welded structure may cause inconvenience in disassembly and inspection of the canned motor pump.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a magnetic canned motor pump, which solves the problems that the traditional canned motor pump cannot meet the higher requirements of certain special fields on light weight and small volume and is inconvenient to disassemble and maintain; bearing blocks at two ends of the canned motor pump are fixed on the intermediate body, so that a bearing block supporting structure and a flange structure connected with a motor shell are omitted; an independent isolation sleeve is arranged and fixed on the intermediate body through threaded connection, so that a shielding sleeve is prevented from being welded on the outer side of the motor stator, and the motor stator is convenient to disassemble and maintain; the motor shell is an integral body, so that the heaviness caused by flange connection is avoided.

The present invention achieves the above-described object by the following technical means.

A magnetic shield pump comprises a pump body, an intermediate body, a motor shell, a motor stator, a motor rotor and a hollow shaft, wherein the motor stator and the motor rotor are arranged inside the motor shell; the hollow shaft is supported in the middle body, one end of the hollow shaft extends into the pump body and is connected with the impeller, and the other end of the hollow shaft is positioned in the motor shell and is connected with the motor rotor; be equipped with the separation sleeve between electric motor rotor and the motor stator, the separation sleeve passes through the screw connection midbody, the separation sleeve outside is located to the motor stator cover, just the motor stator inboard leaves the clearance with the separation sleeve outside.

Furthermore, a spindle head nut fixing impeller is sleeved at one end of the hollow shaft in the pump body, and a nut fixing motor rotor is sleeved at one end in the motor shell.

Furthermore, a first shaft sleeve and a second shaft sleeve are sleeved outside the hollow shaft, a first sliding bearing is sleeved outside the first shaft sleeve, a first bearing seat is sleeved outside the first sliding bearing, and the first bearing seat is connected with the inner side of the intermediate body; and a second sliding bearing is sleeved outside the second shaft sleeve, a second bearing seat is sleeved outside the second sliding bearing, and the second bearing seat is connected with the inner side of the intermediate body.

Furthermore, a first thrust disc is arranged between the first sliding bearing and the impeller, and the first thrust disc is sleeved outside the hollow shaft; and a second thrust disc is arranged between the second sliding bearing and the motor rotor, and the second thrust disc is sleeved outside the hollow shaft.

Further, a spindle head nut through hole is formed in the top of the spindle head nut, a shaft hole inlet is formed in the tail portion of one end, located in the motor shell, of the hollow shaft, and the spindle head nut through hole is communicated with the shaft hole inlet.

Further, a front opening ring is sleeved on the contact surface of the impeller and the pump body; and a back opening ring is sleeved at the contact surface of the impeller and the intermediate body and used for circulating a liquid medium.

Further, the motor shell is a U-shaped shell.

Further, a base is arranged at the bottom of the motor shell.

The invention has the beneficial effects that:

1. the magnetic shield pump omits a middle body and a flange structure connected with the motor shell, and the overall length of the shield pump is shortened.

2. The magnetic shielding pump is provided with the independent isolation sleeve, and the isolation sleeve is fixedly connected through the threads, so that the isolation sleeve welded on the outer side of the motor stator is avoided, and the magnetic shielding pump is convenient to disassemble and maintain in daily work.

3. According to the magnetic shield pump, the motor shell is an integral body, so that the heaviness caused by flange connection of the motor shell and the cover plate is avoided, the structure of the shield pump is simplified, the small size and light weight of the shield pump are realized, and the shield pump is convenient to disassemble and overhaul in daily work.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained from the drawings without creative efforts.

Fig. 1 is an assembly diagram of the magnetic shield pump according to the present invention.

In the figure:

1-a pump body; 2-an impeller; 3-a rear mouth ring; 4-a first sleeve; 5-a first sliding bearing; 6-screw; 7-an isolation sleeve; 8-an intermediate; 9-a second sliding bearing; 10-a motor rotor; 11-a motor stator; 12-a motor housing; 13-a nut; 14-a hollow shaft; 15-a base; 16-a second thrust disc; 17-a second bearing block; 18-a second bushing; 19-a first bearing seat; 20-a first thrust disc; 21-anterior orifice ring; 22-a spindle nose nut; a1-pump inlet; a2, a through hole of the spindle nose nut; a3, pumping out an outlet; a4-inlet of shaft hole.

Detailed Description

The invention will be further described with reference to the following figures and specific examples, but the scope of the invention is not limited thereto.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "axial," "radial," "vertical," "horizontal," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

As shown in fig. 1, the magnetic shield pump of the present invention includes a pump body 1, an intermediate body 8, a motor housing 12, a hollow shaft 14, a motor rotor 10 and a motor stator 11, wherein the motor housing 12 is a U-shaped housing, and a base 15 is disposed at a bottom of the motor housing 12. The motor rotor 10 and the motor stator 11 are arranged in the motor shell 12, and the intermediate body 8 and the motor shell 12 are connected to the pump body 1 through bolts to form a pump cavity of a closed structure. The hollow shaft 14 runs through the pump chamber, 14 one end of the hollow shaft stretches into the pump body 1, connect impeller 2, the other end is located motor casing 12, connect electric motor rotor 10, electric motor rotor 10 includes inner cylinder part and outer cylinder part, the one end that hollow shaft 14 is located motor casing 12 is fixed to the inner cylinder part, outer cylinder part extends to the outside of midbody 8, the one end that the hollow shaft 14 is located the pump body 1 uses spindle nose nut 22 to fix impeller 2, the one end that is located motor casing 12 uses nut 13 to fix electric motor rotor 10, and spindle nose nut 22 top has seted up spindle nose nut through-hole A2, the one end afterbody that the hollow shaft is located motor casing is equipped with shaft hole import A4, spindle nose nut through-hole A2 is linked together with shaft hole import A4, be used for the circulation of liquid medium. An isolation sleeve 7 is arranged between the motor rotor 10 and the motor stator 11, the isolation sleeve 7 is fixedly connected with the intermediate body 8 through a screw 6, the motor stator 11 is sleeved outside the isolation sleeve 7, a gap is reserved between the motor stator and the isolation sleeve 7, and the isolation sleeve welded on the motor rotor 10 is avoided. A first shaft sleeve 4 and a second shaft sleeve 18 are sleeved outside the hollow shaft 14, a first sliding bearing 5 is sleeved outside the first shaft sleeve 4 on the hollow shaft 14, a first bearing seat 19 is sleeved outside the first sliding bearing 5, and the first bearing seat 19 is connected with the inner side of the intermediate body 8; the second sliding bearing 9 is sleeved outside a second shaft sleeve 18 positioned on the hollow shaft 14, a second bearing seat 17 is sleeved outside the second sliding bearing 9, and the second bearing seat 17 is connected with the inner side of the intermediate body 8. A first thrust disc 20 is arranged between the first sliding bearing 5 and the impeller 2, and the first thrust disc 20 is sleeved outside the hollow shaft 14; a second thrust disc 16 is arranged between the second sliding bearing 9 and the motor rotor 10, and the second thrust disc 16 is sleeved outside the hollow shaft 14. At the contact part of the impeller 2 and the pump body 1, the impeller 2 is sleeved with a front opening ring 21; at the contact position of the impeller 2 and the intermediate body 8, the impeller 2 is sleeved with a back mouth ring 3 for the circulation of a liquid medium in the pump body 1. The pump body 1 is also provided with a pump inlet A1 and a pump outlet A3.

After the motor is electrified, the motor stator 11 generates a rotating magnetic field, the motor rotor 10 cuts magnetic lines of force and generates rotary motion under the rotating magnetic field, the motor rotor 10 drives the hollow shaft 14 and the impeller 2 to synchronously rotate, liquid media enters the pump body 1 from the pump inlet A1, the impeller 2 drives the liquid media to do work and flow out from the pump outlet A3, and liquid media conveying is achieved; meanwhile, part of liquid flows to the back of the impeller 2 from the gap of the back opening ring 3 of the impeller 2 and the opening of the intermediate body 8, flows through the first sliding bearing 5 and the second sliding bearing 9, cools and lubricates the friction pair, flows through the shaft hole inlet A4, enters the hollow shaft 14, flows out from the shaft nut through hole A1, flows into the impeller 2, and circulates sequentially.

It should be understood that although the present description has been described in terms of various embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and those skilled in the art will recognize that the embodiments described herein may be combined as suitable to form other embodiments, as will be appreciated by those skilled in the art.

The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.

Claims

1. The magnetic shield pump is characterized by comprising a pump body (1), an intermediate body (8), a motor shell (12), a motor stator (11), a motor rotor (10) and a hollow shaft (14), wherein the motor stator (11) and the motor rotor (10) are arranged inside the motor shell (12), and the intermediate body (8) and the motor shell (12) are connected with the pump body (1) through bolts; the hollow shaft (14) is supported in the intermediate body (8), one end of the hollow shaft (14) extends into the pump body (1) and is connected with the impeller (2), and the other end of the hollow shaft is positioned in the motor shell (12) and is connected with the motor rotor (10); be equipped with between electric motor rotor (10) and motor stator (11) separation sleeve (7), separation sleeve (7) are through screw (6) connection midbody (8), separation sleeve (7) outside is located to motor stator (11) cover, just motor stator (11) inboard leaves the clearance with separation sleeve (7) outside.

2. The magnetic shield pump according to claim 1, characterized in that the hollow shaft (14) is provided with a spindle head nut (22) for fixing the impeller (2) at one end in the pump body (1), and is provided with a nut (13) for fixing the motor rotor (10) at one end in the motor housing (12).

3. The magnetic shielding pump according to claim 1, characterized in that the hollow shaft (14) is externally sleeved with a first shaft sleeve (4) and a second shaft sleeve (18), the first shaft sleeve (4) is externally sleeved with a first sliding bearing (5), the first sliding bearing (5) is externally sleeved with a first bearing seat (19), and the first bearing seat (19) is connected with the inner side of the intermediate body (8); the second sliding bearing (9) is sleeved outside the second shaft sleeve (18), the second bearing seat (17) is sleeved outside the second sliding bearing (9), and the second bearing seat (17) is connected with the inner side of the intermediate body (8).

4. The magnetic shield pump according to claim 3, characterized in that a first thrust disc (20) is arranged between the first sliding bearing (5) and the impeller (2), and the first thrust disc (20) is sleeved outside the hollow shaft (14); a second thrust disc (16) is arranged between the second sliding bearing (9) and the motor rotor (10), and the second thrust disc (16) is sleeved outside the hollow shaft (14).

5. The magnetic shield pump according to claim 1, characterized in that a spindle nose nut through hole (A2) is formed in the top of the spindle nose nut (22), a shaft hole inlet (A4) is formed in the tail portion of one end, located in the motor housing (12), of the hollow shaft (14), and the spindle nose nut through hole (A2) is communicated with the shaft hole inlet (A4).

6. The magnetic shield pump according to claim 1, characterized in that a front opening ring (21) is sleeved at the contact surface of the impeller (2) and the pump body (1); the contact surface of the impeller (2) and the intermediate body (8) is sleeved with a rear opening ring (3) for circulating a liquid medium.

7. The magnetic canned pump of claim 1, wherein the motor housing (12) is a U-shaped housing.

8. The magnetic shield pump according to claim 1, characterized in that the motor housing (12) is provided with a base (15) at the bottom.