External circulation type shield pump for conveying high-temperature strong-alkali medium

Abstract

The utility model discloses an external circulation type shield pump for conveying high-temperature and strong-alkali media, and relates to the technical field of shield pumps. The device comprises a front bearing assembly, a rear bearing assembly and a connecting bearing, the front bearing assembly comprises a front bearing shell; a front bearing seat is fixed on the inner wall of the front bearing shell; a bearing steel sleeve is arranged on the inner wall of the front bearing seat; a first cylindrical pin penetrates through the side surface of the bearing steel sleeve; an Sic bearing is arranged on the inner wall of the bearing steel sleeve; a shaft sleeve is arranged on the inner wall of the Sic bearing; linings are arranged on the inner walls of the shaft sleeves; a thrust disc is arranged on the side face of the bush. The front bearing shell and the front bearing seat are connected through the hexagon socket head cap screws, the front bearing seat and the bearing steel sleeve are connected through the first cylindrical pin, the Sic bearing and the bearing steel sleeve are connected through the second cylindrical pin, and the shaft sleeve and the thrust disc are connected through the hexagon socket head cap screws, so that the front bearing assembly is in a fixed static state. Therefore, under the working conditions of high temperature and strong alkali, the bearing is prevented from being corroded and loosened, and meanwhile, the Sic bearing is prevented from rotating.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of canned motor pump, especially relates to a outer circulation type canned motor pump for conveying high-temperature strong alkali medium. BACKGROUND

[0002] With the gradual decrease of current fossil resources, the demand for clean energy such as hydrogen energy, biomass energy and geothermal energy is increasing, and its production is accelerating. Alkaline electrolytic water hydrogen production technology is widely used because of its high maturity and low cost, but its application range is limited due to the strong corrosive nature of the medium.

[0003] At present, the sliding graphite bearing or superhard bearing is used for the canned motor pump above 710 large motor, which cannot meet the requirement of the axial force of the large flow low-lift pump on the bearing strength, so that the service life of the sliding graphite bearing or superhard bearing is greatly reduced under the working condition of large flow low-lift. The alkali solution under high temperature and high pressure has strong corrosive nature, and the ordinary canned motor pump locking screw anti-loose structure is easy to loosen under the corrosion of strong corrosive medium, so as to cause the bearing to shake in the pump and wear other parts, and the axial force balance is broken under the high flow low-lift working condition, which leads to the axial movement of the impeller, and further affects the gap between the impeller and the pump body, so that the impeller and the pump body are in contact, causing friction and wear.

[0004] Therefore, we provide an outer circulation type canned motor pump for conveying high-temperature strong alkali medium to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model discloses a kind of outer circulation type canned motor pumps for conveying high-temperature strong alkali medium, and the front bearing shell is fixedly connected with front bearing seat by hexagonal head screw, the front bearing seat is fixedly connected with bearing steel cover by first cylindrical pin, Sic bearing is fixedly connected with bearing steel cover by second cylindrical pin, shaft sleeve is fixedly connected with thrust disc by hexagonal screw, so that front bearing assembly is in fixed stationary state, to prevent bearing from loosening under corrosion under high-temperature strong alkali working condition, simultaneously prevent Sic bearing from rotating, solve the problem that ordinary canned motor pump locking screw anti-loose structure is easy to loosen under the corrosion of strong corrosive medium, so as to cause the bearing to shake in the pump and wear other parts, and the axial force balance is broken under the high flow low-lift working condition, which leads to the axial movement of the impeller, and further affects the gap between the impeller and the pump body, so that the impeller and the pump body are in contact, causing friction and wear.

[0006] To solve the above technical problems, the utility model is through the following technical schemes realizes: the utility model discloses a kind of outer circulation type shield pump for conveying high-temperature strong base medium, including front bearing assembly and rear bearing assembly;Connecting bearing is sealingly connected between the front bearing assembly and rear bearing assembly;The front bearing assembly includes front bearing shell;Front bearing seat is fixed in the inner wall of the front bearing shell;The front bearing seat is fixed in the inner wall of the front bearing shell by internal hexagonal cylindrical head screw;Bearing steel sleeve is arranged in the inner wall of the front bearing seat;First cylindrical pin is arranged in the side surface of the bearing steel sleeve;The first cylindrical pin extends into the side surface of the front bearing seat;Sic bearing is arranged in the inner wall of the bearing steel sleeve;Bushing is arranged in the inner wall of the shaft sleeve;Thrust disc is arranged in the side surface of the bushing.

[0007] The utility model further sets up, the inner wall of the Sic bearing is arranged with second cylindrical pin;Second cylindrical pin extends into the inner wall of the bearing steel sleeve;The Sic bearing is fixedly connected with bearing steel sleeve by second cylindrical pin.

[0008] The utility model further sets up, internal hexagonal screw is arranged on the shaft sleeve;Internal hexagonal screw extends into thrust disc and penetrates thrust disc;The shaft sleeve is fixedly connected with thrust disc by internal hexagonal screw.

[0009] The utility model further sets up, and the rear bearing assembly includes rear bearing shell;Rear bearing seat is fixed in the inner wall of the rear bearing shell;Thrust tile bearing is arranged in the inner wall of the rear bearing seat;Connecting bearing is fixedly connected with front bearing shell and rear bearing shell respectively.

[0010] The utility model further sets up, and pump body is fixed on the circumferential surface of the front bearing shell;Circulation pipe is fixed on the circumferential surface of the rear bearing shell;One end of the circulation pipe is connected with the inside of thrust tile bearing, and the other end is connected with the inside of pump body.

[0011] The utility model further sets up, and water cooling jacket is arranged on the circumferential surface of the circulation pipe;Valve is fixed on the circumferential surface of the water cooling jacket and is connected with the inside thereof;Cold water is connected to one end of the valve.

[0012] The utility model further sets up, and rotor assembly and stator assembly are arranged in the inner wall of connecting bearing;Rotor shield sleeve and stator shield sleeve are arranged between the rotor assembly and stator assembly.

[0013] The utility model has the following beneficial effects: 1, the utility model passes through the internal hexagonal cylindrical head screw fixed connection front bearing shell and front bearing seat, passes through the first cylindrical pin fixed connection front bearing seat and bearing steel cover, passes through the second cylindrical pin fixed connection Sic bearing and bearing steel cover, passes through the internal hexagonal screw fixed connection axle sleeve and thrust disc, makes front bearing assembly be in fixed stationary state, thereby under high temperature strong alkali working condition, prevents bearing from corrosion and loosening, simultaneously prevents Sic bearing from rotating.

[0014] 2, the utility model transports high flow low lift's high temperature strong alkali medium, high temperature strong alkali medium is cooled by water cooling jacket after passing through pump body and flows into rear bearing seat inner chamber through circulating pipe, enters the clearance between thrust disc and tile block in thrust tile bearing, when rotor assembly produces axial thrust, the medium in the clearance is pressed and is passed to tile block, because tile block is eccentric support stress and produces deflection, forms wedge clearance between thrust disc, forms liquid friction, thereby makes thrust tile bearing bear most of axial force, makes axial force reach balance, reduces the load that sliding bearing bears, avoids causing abnormal wear and tear.

[0015] Of course, any product implementing the utility model does not necessarily need to achieve all the advantages described above. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment description, obviously, the drawings in the following description only some embodiments of the utility model, for those skilled in the art, under the premise of not paying creative labor, other drawings can also be obtained according to these drawings.

[0017] Fig. 1 It is a kind of structure schematic diagram of the outer circulation type shield pump of conveying high temperature strong alkali medium.

[0018] Fig. 2 It is the structure schematic diagram of the front bearing assembly of the utility model.

[0019] In the drawings, the component list represented by each sign is as follows:

[0020] 1, front bearing seat;2, bearing steel cover;3, first cylindrical pin;4, second cylindrical pin;5, internal hexagonal screw;6, bushing;7, thrust disc;8, axle sleeve;9, Sic bearing;10, pump body;11, water cooling jacket;12, thrust tile bearing;13, rear bearing shell;14, rotor assembly;15, connecting bearing;16, front bearing shell;17, rear bearing seat;18, circulating pipe;19, valve;20, stator assembly. DETAILED DESCRIPTION

[0021] With reference to the accompanying drawings, the technical solutions in the embodiments of the present application will be clearly and completely described, obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0022] Specific embodiment one, please refer to Figs. 1-2 The utility model discloses a kind of outer circulation type shield pumps for conveying high-temperature strong base medium, including front bearing assembly and rear bearing assembly;Front bearing assembly and rear bearing assembly are sealingly connected with connecting bearing 15;Front bearing assembly includes front bearing shell 16;Front bearing shell 16 inner wall is fixed with front bearing seat 1;Front bearing seat 1 is fixed in the inner wall of front bearing shell 16 by internal hexagonal cylindrical head screw;Front bearing seat 1 inner wall is provided with bearing steel sleeve 2;First cylindrical pin 3 is provided with first cylindrical pin 3 on the side of bearing steel sleeve 2;First cylindrical pin 3 extends into the side of front bearing seat 1;Sic bearing 9 is provided in the inner wall of bearing steel sleeve 2;Sic bearing 9 inner wall is provided with shaft sleeve 8;Shaft sleeve 8 inner wall is provided with bushing 6;Bushing 6 side is provided with thrust disc 7.

[0023] Specifically, second cylindrical pin 4 is provided in the inner wall of Sic bearing 9;Second cylindrical pin 4 extends into the inner wall of bearing steel sleeve 2;Sic bearing 9 and bearing steel sleeve 2 are fixedly connected by second cylindrical pin 4.

[0024] Further, internal hexagonal screw 5 is provided on shaft sleeve 8;Internal hexagonal screw 5 extends into thrust disc 7 and penetrates thrust disc 7;Shaft sleeve 8 and thrust disc 7 are fixedly connected by internal hexagonal screw 5.

[0025] The operation process of the embodiment is as follows: front bearing assembly, connecting bearing 15 and rear bearing assembly are sequentially fixedly connected, front bearing shell 16 and front bearing seat 1 are fixedly connected by internal hexagonal cylindrical head screw, front bearing seat 1 and bearing steel sleeve 2 are fixedly connected by first cylindrical pin 3, Sic bearing 9 and bearing steel sleeve 2 are fixedly connected by second cylindrical pin 4, and shaft sleeve 8 and thrust disc 7 are fixedly connected by internal hexagonal screw 5, so that the front bearing assembly is in a fixed and stationary state, thereby preventing the bearing from loosening due to corrosion and preventing Sic bearing 9 from rotating under high-temperature strong base working conditions.

[0026] Specific embodiment two, please refer to Figs. 1-2 On the basis of specific embodiment one, rear bearing assembly includes rear bearing shell 13;Rear bearing shell 13 inner wall is fixed with rear bearing seat 17;Rear bearing seat 17 inner wall is provided with thrust pad bearing 12;Connecting bearing 15 is fixedly connected with front bearing shell 16 and rear bearing shell 13 respectively.

[0027] Specifically, the front bearing shell 16 is fixed with the pump body 10 on the peripheral side; the rear bearing shell 13 is fixed with the circulating pipe 18 on the peripheral side; the circulating pipe 18 is connected with the inside of the thrust pad bearing 12 at one end, and is connected with the inside of the pump body 10 at the other end.

[0028] Further, the circulating pipe 18 is provided with the water cooling jacket 11 on the peripheral side; the water cooling jacket 11 is fixed with the valve 19 penetrating through the peripheral side and being connected with the inside; the valve 19 is connected with the cold water at one end.

[0029] Further, the connecting bearing 15 is provided with the rotor assembly 14 and the stator assembly 20 on the inner wall; the rotor assembly 14 and the stator assembly 20 are provided with the rotor shield sleeve and the stator shield sleeve.

[0030] The operation process of the embodiment is as follows: the rear bearing shell 13 and the rear bearing seat 17 are fixedly connected through the internal hexagonal cylindrical head screw, the rear bearing seat 17 and the thrust pad bearing 12 are fixedly connected through the internal hexagonal cylindrical head screw, the connecting bearing 15 is fixedly connected with the front bearing shell 16 and the rear bearing shell 13 through the internal hexagonal cylindrical head screw at both ends, the thrust pad bearing 12 has the thrust disc and the pad, there is a gap between the thrust disc and the pad, the pad is eccentrically supported, the working principles of the rotor assembly 14 and the stator assembly 20 are the prior art, and details are not described herein.

[0031] In use, the high-temperature strong alkali medium with large flow and low lift is cooled by the pump body 10 through the water cooling jacket 11, and then flows into the inner cavity of the rear bearing seat 17 through the circulating pipe 18, and enters the gap between the thrust disc and the pad in the thrust pad bearing 12; when the rotor assembly 14 generates the axial thrust, the medium in the gap is subjected to the pressure and is transmitted to the pad, the pad is deflected due to the eccentric support under the stress, and a wedge-shaped gap is formed between the pad and the thrust disc, liquid friction is formed, so that the thrust pad bearing 12 bears most of the axial force, the axial force is balanced, the load borne by the sliding bearing is reduced, and abnormal wear is avoided.

[0032] In the description of the present specification, the description of the terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are contained in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0033] The preferred embodiments disclosed above are only used to help describe the utility model. The preferred embodiments do not describe all the details and do not limit the utility model to the specific embodiments. Obviously, according to the content of the specification, many modifications and changes can be made. The specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that the persons skilled in the art can well understand and utilize the utility model. The utility model is limited by the claims and the entire scope and equivalents thereof.

Claims

1. A canned motor pump for conveying high-temperature, highly alkaline media with external circulation, comprising a front bearing assembly and a rear bearing assembly; wherein a connecting bearing (15) is sealed between the front bearing assembly and the rear bearing assembly; characterized in that: The front bearing assembly includes a front bearing housing (16); a front bearing seat (1) is fixed to the inner wall of the front bearing housing (16); the front bearing seat (1) is fixed to the inner wall of the front bearing housing (16) by hexagon socket head cap screws; The inner wall of the front bearing housing (1) is provided with a bearing steel sleeve (2); a first cylindrical pin (3) is provided through the side of the bearing steel sleeve (2); the first cylindrical pin (3) extends into the side of the front bearing housing (1); The bearing steel sleeve (2) is provided with a Sic bearing (9) on its inner wall; the Sic bearing (9) is provided with a bushing (8) on its inner wall; the bushing (8) is provided with a bushing (6) on its inner wall; and the bushing (6) is provided with a thrust disc (7) on its side.

2. The outer-circulation type canned pump for delivering a high-temperature strong alkali medium according to claim 1, characterized by A second cylindrical pin (4) is provided through the inner wall of the Sic bearing (9); the second cylindrical pin (4) extends into the inner wall of the bearing sleeve (2); the Sic bearing (9) and the bearing sleeve (2) are fixedly connected by the second cylindrical pin (4).

3. The outer-circulation type canned pump for delivering a high-temperature strong alkali medium according to claim 2, characterized by The bushing (8) is provided with an internal hexagon screw (5); the internal hexagon screw (5) extends into and passes through the thrust plate (7); the bushing (8) and the thrust plate (7) are fixedly connected by the internal hexagon screw (5).

4. The outer-circulation type canned pump for delivering a high-temperature strong alkali medium according to claim 3, characterized by The rear bearing assembly includes a rear bearing housing (13); a rear bearing seat (17) is fixed to the inner wall of the rear bearing housing (13); a thrust bearing (12) is provided on the inner wall of the rear bearing seat (17); and the connecting bearing (15) is fixedly connected to the front bearing housing (16) and the rear bearing housing (13) respectively.

5. The external circulation type shielded pump for conveying high-temperature strong alkaline media according to claim 4, characterized in that, The pump body (10) is fixed to the circumferential side of the front bearing housing (16); the circulation pipe (18) is fixed to the circumferential side of the rear bearing housing (13); one end of the circulation pipe (18) is connected to the inside of the thrust bearing (12), and the other end is connected to the inside of the pump body (10).

6. The external circulation type shielded pump for conveying high-temperature strong alkaline media according to claim 5, characterized in that, A water-cooled jacket (11) is provided on the periphery of the circulation pipe (18); a valve (19) is fixed through the periphery of the water-cooled jacket (11) and communicates with its interior; one end of the valve (19) is connected to cold water.

7. The external circulation type shielded pump for conveying high-temperature strong alkaline media according to claim 6, characterized in that, The inner wall of the connecting bearing (15) is provided with a rotor assembly (14) and a stator assembly (20); a rotor shield and a stator shield are provided between the rotor assembly (14) and the stator assembly (20).

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