CN215213961U

CN215213961U - Double-shell radial subdivision self-balancing axial force multistage pump

Info

Publication number: CN215213961U
Application number: CN202121346035.2U
Authority: CN
Inventors: 韩闯; 邓朝红; 范学民; 胡芳楠
Original assignee: Shenyang Great Pump Co ltd
Current assignee: Shenyang Great Pump Co ltd
Priority date: 2021-06-17
Filing date: 2021-06-17
Publication date: 2021-12-17
Anticipated expiration: 2031-06-17

Abstract

A double-shell radial subdivision self-balancing axial force multistage pump relates to an axial force multistage pump, wherein a suction box body (2) and a cylinder body (1) of the multistage pump are fixedly connected by bolts and nuts, and are sealed by a winding pad; the middle section (4) and the cylinder body (1) are positioned by adopting a seam allowance and sealed by a winding gasket, and an anti-rotation positioning pin is installed; the guide vane (6) and the other guide vane (7) are symmetrically arranged between the middle section (4) and the other middle section (5), a center sleeve (8) is positioned in the middle of the guide vane and the other guide vane (7) through a spigot, the guide vane (6) and the other guide vane (7) form a positive and negative double flow passage, and an anti-rotation positioning pin is arranged between each stage; a compressible winding pad is assembled between the guide vane (6) and the pump cover (3) to form a pump core with the rotor assembly, and the pump cover (3) presses the pump core in the cylinder body (1); the impellers (9) are symmetrically arranged and are sequentially arranged on the shaft (10) in a sliding way. The utility model discloses multistage pump is applicable to 3 incessant moving petrochemical industry and carries easily burning, explosive, high temperature or high-pressure medium.

Description

Double-shell radial subdivision self-balancing axial force multistage pump

Technical Field

The utility model relates to an axial force multistage pump especially relates to a radial subdivision self-balancing axial force multistage pump of bivalve body.

Background

Most of the petrochemical industry in China uses process barrel type pumps. The API BB5 type barrel pump is one of the most technically advanced industrial centrifugal pumps manufactured to date according to the API 610 standard, designed and designed according to the latest ISO 13709/standard. The prior commonly used barrel-type pump impeller is sequentially arranged on a shaft, the axial force is balanced by a balancing device, and the residual axial force and the additional axial force generated under special working conditions are born by a thrust bearing; in the process of high-speed operation of the pump, if the pump cannot bear the forces, the vibration of the pump is aggravated, the mechanical seal fails, and a plurality of parts in the pump are seriously abraded, so that the long-period uninterrupted operation cannot be met. To solve this problem, it is necessary to develop an improvement of the existing barrel type pump.

Disclosure of Invention

An object of the utility model is to provide a radial subdivision self-balancing axial force multistage pump of bivalve body, the utility model discloses stator and another stator set up in the centre of middle section and another middle section symmetrically, and stator and another stator are all established on the center pin, realize the self-balancing axial force, and the additional axial force that residual axial force and produced under special operating mode is undertaken by thrust bearing, reduces pump vibration index, makes the pump operate steadily, prolongs sealed life.

The utility model aims at realizing through the following technical scheme:

a double-shell radial subdivision self-balancing axial force multistage pump is characterized in that a suction box body and a cylinder body of the multistage pump are fixedly connected through bolts and nuts, and are sealed through a winding pad; the middle section and the barrel are positioned by adopting a seam allowance and sealed by a winding gasket, and an anti-rotation positioning pin is installed; the guide vane and the other guide vane are symmetrically arranged between the middle section and the other middle section, a spigot is used for positioning the central sleeve in the middle of the guide vane and the other guide vane, a positive and negative double flow passage is formed by the guide vane and the other guide vane, and an anti-rotation positioning pin is arranged between each stage; a compressible winding pad is assembled between the guide vane and the pump cover, the compressible winding pad and the rotor assembly form a pump core, and the pump cover presses the pump core in the cylinder body; the impellers are symmetrically arranged and sequentially arranged on the shaft in a sliding manner; the balance sleeve is arranged in the symmetrical middle position of the impeller to form a rotor assembly; the sliding bearing component uses a pin to position the bearing cover I and the bearing body and is in clearance fit on the shaft; the thrust block is mounted on the thrust bearing seat by using a positioning pin, the thrust bearing seat and the thrust disk are in clearance fit on the shaft, and the sliding bearing component is positioned on the thrust bearing shell and the bearing body end cover by using the pin.

The double-shell radial subdivision self-balancing axial force multistage pump is characterized in that the cylinder body and the pump cover are sealed through a winding pad and fixed through bolts and nuts.

The rotor assembly of the double-shell radial subdivision self-balancing axial force multistage pump is radially supported and axially fixed by two radial bearing body parts and a thrust bearing.

The double-shell radial subdivision self-balancing axial force multistage pump is characterized in that a first bearing cover and a bearing body are connected through bolts to form a radial bearing body part and are connected with a suction box body, and the connection mode is bolts and nuts.

The double-shell radial subdivision self-balancing axial force multistage pump is characterized in that a thrust bearing shell and a bearing body end cover are connected through bolts, a second bearing cover is fixed on the thrust bearing shell and the bearing body end cover through screws, and a rubber ring is used for sealing between the thrust bearing shell and the bearing body end cover to form a thrust bearing.

The double-shell radial subdivision self-balancing axial force multistage pump is characterized in that the thrust bearing is installed behind the pump cover through bolts, and the rotor assembly is fixed at the axial position.

The utility model has the advantages and effects that:

1. the utility model discloses a stator and another stator set up in the centre of middle section and another middle section symmetrically, and stator and another stator form positive and negative double-flow-passage. The guide vane and the other guide vane are sleeved on the central shaft.

2. The utility model discloses the impeller is symmetrical arrangement, has a central sleeve and balance sleeve to compensate the axial force to realize self-balancing axial force, the additional axial force that residual axial force and produced under special operating mode is undertaken by thrust bearing.

3. The utility model discloses reduce pump vibration index to make the pump operate steadily, prolong sealed life, solve the serious phenomenon of pump internals wearing and tearing.

Drawings

Fig. 1 is the structure diagram of the double-casing radial subdivision self-balancing axial force multistage pump of the present invention.

The components in the figure: 1. the thrust bearing comprises a cylinder body, 2, an intake box body part, 3, a pump cover part, 4, a middle section, 5, another middle section, 6, a guide vane, 7, another guide vane, 8, a central sleeve, 9, an impeller, 10, a shaft, 11, a balance sleeve, 12, a radial bearing part, 13, a thrust bearing, 14, a sliding bearing part, 15, a bearing cover I, 16, a bearing body and 17, wherein the thrust bearing comprises a thrust disc, 18, a thrust block, 19, a thrust bearing seat, 20, a thrust bearing shell, 21, a bearing body end cover and 22, and a bearing cover II.

Detailed Description

The present invention will be described in detail with reference to the embodiments shown in the drawings.

The utility model discloses stator and another stator set up in the centre of middle section and another middle section symmetrically, and stator and another stator form positive and negative double flow way. The impellers are symmetrically arranged, and a central sleeve and a balance sleeve are arranged to compensate the axial force, so that the self-balancing axial force is realized, and the residual axial force and the additional axial force generated under special working conditions are borne by a thrust bearing.

The utility model discloses the radial subdivision of double housing is from balancing axial force multistage pump comprises outside casing, inside casing subassembly, rotor subassembly, bearing body part.

The outer shell part consists of a cylinder body 1, an inhalation box body 2, a pump cover 3 and the like.

The inner housing assembly consists of a middle section 4, another middle section 5, a guide vane 6, another guide vane 7, a central sleeve 8, etc.

The rotor component consists of an impeller 9, a shaft 10 and a balance sleeve 11; the impellers are symmetrically arranged, and a central sleeve 8 and a balance sleeve 11 are arranged to compensate the axial force, so that the self-balance axial force is realized, and the residual axial force and the additional axial force generated under special working conditions are borne by a thrust bearing 13. The bearing body members include a radial bearing member 12 and a thrust bearing 13.

Examples

As shown in the figure, the suction box body 2 and the cylinder body 1 of the utility model are fixedly connected by bolts and nuts, and are sealed by a winding pad; the middle section 4 and the cylinder body 1 are positioned by adopting a spigot, sealed by a winding pad and provided with an anti-rotation positioning pin; the guide vane 6 and the other guide vane 7 are symmetrically arranged between the middle section 4 and the other middle section 5, a spigot positioning central sleeve 8 is arranged between the guide vane 6 and the other guide vane 7, a positive and negative double flow passage is formed between the guide vane 6 and the other guide vane 7, and an anti-rotation positioning pin is arranged between each stage. A compressible winding pad is assembled between the guide vane 6 and the pump cover 3 to form a pump core together with the rotor assembly, so that the pump cover 3 can reliably press the pump core in the cylinder body 1. The cylinder body 1 and the pump cover 3 are sealed by a winding pad and fixed by special bolts and nuts.

The impellers 9 are symmetrically arranged and are sequentially arranged on a shaft 10 in a sliding way; the balance sleeve 11 is arranged at the symmetrical middle position of the impeller 9 to form a rotor assembly.

The rotor assembly is radially supported and axially fixed by two radial bearing body components 12 and a thrust bearing 13.

The sliding bearing component 14 is positioned on the first bearing cover 15 and the bearing body 16 by using pins, is in clearance fit with the shaft 10, and the first bearing cover 15 and the bearing body 16 are connected through bolts to form a radial bearing body component 12; is connected with the suction box body 2 by a bolt and a nut.

The thrust block 18 is installed on the thrust bearing seat 19 by using a locating pin, the thrust bearing seat 19 is in clearance fit with the thrust disc 17 on the shaft 10, the sliding bearing component 14 is located on the thrust bearing shell 20 and the bearing body end cover 21 by using a pin, the thrust bearing shell 20 and the bearing body end cover 21 are connected by using a bolt, and the second bearing cover 22 is fixed on the thrust bearing shell 20 and the bearing body end cover 21 by using a bolt; a rubber ring is adopted for sealing to form a thrust bearing 13; the thrust bearing 13 is bolted behind the pump cover 3 and fixes the rotor assembly in axial position.

When the pump works, an operating medium conveyed by the pump passes through a pump inlet of the cylinder body 1 under certain pressure, the kinetic energy and the potential energy of the operating medium are increased through the impellers 9 in the rotor assembly, most of the kinetic energy is converted into the potential energy after flowing into the first-stage discharge flow channel of the guide vane 6, the impellers 9 are symmetrically arranged, liquid is conveyed to the 9 second-stage to five-stage impellers through the flow channel of the guide vane 6, the liquid is conveyed to the 9 sixth-stage to ten-stage impellers through the reverse flow channel of the other guide vane 7, the potential energy of the operating medium is increased step by step, and each stage is boosted to the potential energy of the same operating medium; the central sleeve 8 and the balance sleeve 11 are arranged in the symmetrical middle position of the impeller 9 to compensate the axial force, so that the self-balancing axial force is realized, and the residual axial force and the additional axial force generated under special working conditions are borne by the thrust bearing 13. Finally, the operating medium enters the pump outlet of the cylinder 1 through the final stage discharge channel of the guide vane 6 and flows into the discharge line.

Claims

1. A double-shell radial subdivision self-balancing axial force multistage pump is characterized in that a suction box body (2) and a cylinder body (1) of the multistage pump are fixedly connected through bolts and nuts, and are sealed through a winding pad; the middle section (4) and the cylinder body (1) are positioned by adopting a seam allowance and sealed by a winding gasket, and an anti-rotation positioning pin is installed; the guide vane (6) and the other guide vane (7) are symmetrically arranged between the middle section (4) and the other middle section (5), a center sleeve (8) is positioned in the middle of the guide vane and the other guide vane (7) through a spigot, the guide vane (6) and the other guide vane (7) form a positive and negative double flow passage, and an anti-rotation positioning pin is arranged between each stage; a compressible winding pad is assembled between the guide vane (6) and the pump cover (3) to form a pump core with the rotor assembly, and the pump cover (3) presses the pump core in the cylinder body (1); the impellers (9) are symmetrically arranged and are sequentially arranged on the shaft (10) in a sliding manner; the balance sleeve (11) is arranged in the symmetrical middle position of the impeller (9) to form a rotor assembly; the sliding bearing component (14) uses a pin to position a bearing cover I (15) and a bearing body (16) and is in clearance fit with the shaft (10); the thrust block (18) is arranged on a thrust bearing seat (19) by adopting a positioning pin, the thrust bearing seat (19) and the thrust disc (17) are in clearance fit on the shaft (10), and the sliding bearing component (14) is positioned on a thrust bearing shell (20) and a bearing body end cover (21) by adopting the pin.

2. The double-casing radial subdivision self-balancing axial force multistage pump as claimed in claim 1, characterized in that the cylinder (1) and the pump cover (3) are sealed by a winding gasket and fixed by bolts and nuts.

3. The double-casing radially split self-balancing axial force multistage pump according to claim 1, characterized in that the rotor assembly is radially supported and axially fixed by two radial bearing body parts (12) and a thrust bearing (13).

4. The double-casing radially split self-balancing axial force multistage pump according to claim 1, characterized in that the bearing cover one (15) and the bearing body (16) are bolted to form the radial bearing body member (12) and are connected to the suction box body (2) by bolts and nuts.

5. The double-casing radially-split self-balancing axial force multistage pump as claimed in claim 1, wherein the thrust bearing casing (20) and the bearing body end cover (21) are connected by bolts, the second bearing cover (22) is fixed on the thrust bearing casing (20) and the bearing body end cover (21) by screws, and a rubber ring is used for sealing between the two bearing covers to form the thrust bearing (13).

6. The double-casing radially split self-balancing axial force multistage pump according to claim 5, characterized in that the thrust bearing (13) is mounted behind the pump cover (3) with bolts while fixing the rotor assembly in the axial position.