CN114909317A - Bearing body assembly structure of multistage centrifugal pump and assembling method - Google Patents
Bearing body assembly structure of multistage centrifugal pump and assembling method Download PDFInfo
- Publication number
- CN114909317A CN114909317A CN202210549013.9A CN202210549013A CN114909317A CN 114909317 A CN114909317 A CN 114909317A CN 202210549013 A CN202210549013 A CN 202210549013A CN 114909317 A CN114909317 A CN 114909317A
- Authority
- CN
- China
- Prior art keywords
- bearing
- sleeve
- angular contact
- bearing body
- cylindrical roller
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/046—Bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/007—Details, component parts, or accessories especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/041—Axial thrust balancing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/043—Shafts
- F04D29/044—Arrangements for joining or assembling shafts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
- F04D29/628—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for liquid pumps
Abstract
The invention discloses a bearing body assembly structure of a multistage centrifugal pump and an assembly method, wherein a pump coupling is arranged at the input shaft end of a pump shaft, and the pump shaft at the end where the pump coupling is positioned is rotatably supported in a front bearing body; the other shaft end of the pump shaft is rotatably arranged in the rear bearing body through a second cylindrical roller bearing; a mounting hole is processed in the rear bearing body, two angular contact bearings which are arranged in parallel are sleeved in the mounting hole through a sleeve, and the sleeve and the mounting hole are in clearance fit so that the angular contact bearings only bear axial force; and a third bearing end cover is fixed on the outer side surface of the angular contact bearing. The bearing body assembly structure adopts a combined type rotating support structure combining a needle bearing and an angular contact bearing, so that the radial force generated by a main shaft is borne by the needle bearing alone in the running process of a pump body; and the axial force generated by the main shaft is born by the angular contact bearing alone, and the angular contact bearing cannot bear the radial force in the operation process, so that the service life of the bearing is effectively prolonged.
Description
Technical Field
The invention relates to the field of centrifugal pumps, in particular to a bearing body assembly structure of a multistage centrifugal pump and an assembling method.
Background
The rear bearing assembly of the existing multistage centrifugal pump mainly adopts an independently arranged angular contact bearing, the main shaft of the pump body needs to bear double loads of axial force and radial force in the actual operation process, the angular contact bearing can simultaneously bear the axial force and the radial force at the moment, and the angular contact bearing only preferably bears the axial force in the normal operation process, if simultaneously bears the radial force again, the abrasion of the bearing can be accelerated, so that the bearing body is scrapped, and the normal operation of the pump body is influenced.
For example, CN 212028074U of the present applicant company, a balanced multistage centrifugal pump, in which the bearing assembly is a pair of first angular contact bearing and second angular contact bearing structure arranged in a single row to counteract the axial force, but which itself is subjected to large radial force, resulting in premature wear failure.
Disclosure of Invention
The invention aims to provide a bearing body assembly structure of a multistage centrifugal pump and an assembly method, wherein the bearing body assembly structure adopts a combined type rotating support structure combining a needle bearing and an angular contact bearing, so that the radial force generated by a main shaft is borne by the needle bearing alone in the running process of a pump body; and the axial force generated by the main shaft is born by the angular contact bearing alone, and the angular contact bearing cannot bear the radial force in the operation process, so that the service life of the bearing is effectively prolonged.
In order to achieve the technical features, the invention is realized as follows: the bearing body assembly structure of the multistage centrifugal pump comprises a pump shaft, wherein a pump coupling is arranged at the input shaft end of the pump shaft, and the pump shaft at the end where the pump coupling is arranged is rotatably supported in a front bearing body; the other shaft end of the pump shaft is rotatably arranged in the rear bearing body through a second cylindrical roller bearing; a mounting hole is processed in the rear bearing body, two angular contact bearings which are arranged in parallel are sleeved in the mounting hole through a sleeve, and the sleeve and the mounting hole are in clearance fit so that the angular contact bearings only bear axial force; and a third bearing end cover is fixed on the outer side surface of the angular contact bearing.
A first cylindrical roller bearing is arranged in the front bearing body and used for rotatably supporting the pump shaft; the two sides of the first cylindrical roller bearing are respectively limited and fixed through a first bearing end cover and a second bearing end cover; one side of the inner ring of the first cylindrical roller bearing is limited through a first bearing retaining sleeve.
And the second cylindrical roller bearing is fixed in a bearing hole in the rear bearing body through a second bearing end cover.
And the second cylindrical roller bearing and the inner ring of one angular contact bearing are mutually positioned and supported through a bearing positioning sleeve.
And the matching end surfaces of the sleeve and the third bearing end cover are provided with positioning pins.
A plurality of screw holes which are arranged along the radial direction of the sleeve are processed on the sleeve, screws are installed inside the screw holes, and the tail ends of the screws are tightly propped against the outer ring of the angular contact bearing.
And a rear mechanical seal gland is arranged between the rear bearing body and the pump shaft.
And an inner ring of the angular contact bearing at the end head of the pump shaft is fixed by a round nut.
The assembling method of the bearing body assembly structure of the multistage centrifugal pump comprises the following steps:
firstly, a second cylindrical roller bearing is matched and connected with a pump shaft, and the second cylindrical roller bearing is integrally installed in a rear bearing body;
secondly, positioning and installing the two groups of angular contact bearings in the back direction inside the sleeve, and fixing the sleeve and the outer ring of the angular contact bearings through screws installed inside screw holes;
step three, integrally pressing the angular contact bearing and the sleeve at the end of the pump shaft; the sleeve is fixed through a round nut, and a certain gap is kept between the sleeve and the mounting hole;
step four, the third bearing end cover is in positioning fit with the sleeve through the positioning pin, and the third bearing end cover is fixed;
step five, after the assembly is finished, in the normal running process of the pump shaft, the generated radial force is solely borne by the second cylindrical roller bearing; because the sleeve is in clearance fit with the mounting hole, the angular contact bearing does not bear radial force and only bears axial force.
The invention has the following beneficial effects:
1. the bearing body assembly structure adopts a combined type rotating support structure combining a needle bearing and an angular contact bearing, so that the radial force generated by a main shaft is borne by the needle bearing alone in the running process of a pump body; and the axial force generated by the main shaft is born by the angular contact bearing alone, and the angular contact bearing cannot bear the radial force in the operation process, so that the service life of the bearing is effectively prolonged.
2. The first cylindrical roller bearing can be used for rotatably supporting the front end of the pump shaft, so that smooth rotation of the pump shaft is guaranteed, and the pump shaft can well bear radial force.
3. The second bearing end cap described above can be used to effectively position the second cylindrical roller bearing.
4. The positioning of the second cylindrical roller bearing and the inner ring of the angular contact bearing can be realized through the bearing positioning sleeve.
5. The positioning pin can be used for limiting the sleeve, and further preventing the sleeve from rotating.
6. By mounting the screw in the screw hole, the sleeve and the angular contact bearing can be reliably positioned.
Drawings
The invention is further illustrated by the following figures and examples.
Fig. 1 is an overall structural view of the present invention.
Fig. 2 is a partial view of the front bearing body portion of fig. 1 in accordance with the present invention.
Figure 3 is a partial view of the rear bearing body portion of figure 1 in accordance with the present invention.
In the figure: the bearing comprises a pump coupler 1, a pump shaft 2, a first bearing end cover 3, a first cylindrical roller bearing 4, a front bearing body 5, a second bearing end cover 6, a first bearing baffle sleeve 7, a rear machine sealing cover 8, a second bearing end cover 9, a second cylindrical roller bearing 10, a bearing positioning sleeve 11, a rear bearing body 12, a third bearing end cover 13, a mounting hole 14, a sleeve 15, an angular contact bearing 16, a round nut 17, a positioning pin 18 and a screw hole 19.
Detailed Description
Embodiments of the present invention will be further described with reference to the accompanying drawings.
Example 1:
as shown in fig. 1-3, the bearing body assembly structure of the multistage centrifugal pump includes a pump shaft 2, a pump coupling 1 is installed at an input shaft end of the pump shaft 2, and the pump shaft 2 at the end where the pump coupling 1 is located is rotatably supported inside a front bearing body 5; the other shaft end of the pump shaft 2 is rotatably arranged inside the rear bearing body 12 through a second cylindrical roller bearing 10; a mounting hole 14 is formed in the rear bearing body 12, two angular contact bearings 16 which are arranged in parallel are sleeved in the mounting hole 14 through a sleeve 15, and the sleeve 15 and the mounting hole 14 are in clearance fit so that the angular contact bearings 16 only bear axial force; a third bearing end cap 13 is fixed to the outer side surface of the angular contact bearing 16. By adopting the bearing body assembly structure and adopting the combined rotary supporting structure combining the needle bearing and the angular contact bearing, the radial force generated by the main shaft is borne by the needle bearing alone in the running process of the pump body; and the axial force generated by the main shaft is born by the angular contact bearing alone, and the angular contact bearing cannot bear the radial force in the operation process, so that the service life of the bearing is effectively prolonged.
Further, a first cylindrical roller bearing 4 is installed inside the front bearing body 5, and the first cylindrical roller bearing 4 is used for rotatably supporting the pump shaft 2; the two sides of the first cylindrical roller bearing 4 are respectively limited and fixed through a first bearing end cover 3 and a second bearing end cover 6; one side of the inner ring of the first cylindrical roller bearing 4 is limited by a first bearing baffle sleeve 7. The first cylindrical roller bearing 4 can be used for rotatably supporting the front end of the pump shaft 2, so that smooth rotation of the pump shaft is guaranteed, and the radial force bearing capacity of the pump shaft 2 is guaranteed.
Further, the second cylindrical roller bearing 10 is fixed to a bearing hole in the rear bearing body 12 through the second bearing end cap 9. The second bearing end cap 9 described above can be used to effectively position the second cylindrical roller bearing 10.
Further, the second cylindrical roller bearing 10 and the inner ring of one of the angular contact bearings 16 are mutually positioned and supported through the bearing positioning sleeve 11. The positioning of the inner rings of the second cylindrical roller bearing 10 and the angular contact bearing 16 can be realized by the bearing positioning sleeve 11.
Further, the fitting end surfaces of the sleeve 15 and the third bearing end cap 13 are mounted with positioning pins 18. The positioning pin 18 can be used to limit the position of the sleeve 15 and prevent the sleeve from rotating.
Further, a plurality of screw holes 19 are formed in the sleeve 15 in the radial direction, screws are mounted inside the screw holes 19, and the tail ends of the screws are tightly pressed against the outer ring of the angular contact bearing 16. By mounting screws inside the screw holes 19, the sleeve 15 and the angular bearing 16 can be reliably positioned.
Further, a rear mechanical seal gland 8 is arranged between the rear bearing body 12 and the pump shaft 2.
Further, the inner ring of the angular contact bearing 16 at the end of the pump shaft 2 is fixed by a round nut 17. The round nut 17 can be used for limiting and fixing the end of the angular contact bearing 16.
Example 2:
the assembling method of the bearing body assembly structure of the multistage centrifugal pump comprises the following steps:
firstly, a second cylindrical roller bearing 10 is matched and connected with a pump shaft 2, and the second cylindrical roller bearing 10 is integrally installed in a rear bearing body 12;
secondly, positioning and installing the two groups of angular contact bearings 16 in the sleeve 15 in a back-to-back manner, and fixing the sleeve 15 and the outer ring of the angular contact bearing 16 through screws installed in the screw holes 19;
step three, integrally pressing the angular contact bearing 16 and the sleeve 15 at the end of the pump shaft 2; the sleeve is fixed through a round nut, and meanwhile, a certain gap is kept between the sleeve 15 and the mounting hole 14;
step four, the third bearing end cover 13 is in positioning fit with the sleeve 15 through the positioning pin 18, and the third bearing end cover 13 is fixed;
step five, after the assembly is finished, in the normal operation process of the pump shaft 2, the generated radial force is solely borne by the second cylindrical roller bearing 10; due to the clearance fit between the sleeve 15 and the mounting hole 14, the angular contact bearing 16 is not subjected to radial forces, but only to axial forces.
The working process and principle of the invention are as follows:
in the invention, the angular contact bearing 16 only bears axial force and not radial force by sleeving the corresponding sleeve 15 outside the angular contact bearing 16 and ensuring clearance fit between the sleeve 15 and the mounting hole 14.
Claims (9)
1. Bearing body subassembly structure of multistage centrifugal pump, its characterized in that: the pump comprises a pump shaft (2), wherein a pump coupler (1) is arranged at the input shaft end of the pump shaft (2), and the pump shaft (2) at the end of the pump coupler (1) is rotatably supported in a front bearing body (5); the other shaft end of the pump shaft (2) is rotatably arranged in the rear bearing body (12) through a second cylindrical roller bearing (10); a mounting hole (14) is processed in the rear bearing body (12), two angular contact bearings (16) which are arranged in parallel are sleeved in the mounting hole (14) through a sleeve (15), and the sleeve (15) and the mounting hole (14) are in clearance fit so that the angular contact bearings (16) only bear axial force; a third bearing end cover (13) is fixed on the outer side surface of the angular contact bearing (16).
2. The bearing body assembly structure of a multistage centrifugal pump according to claim 1, characterized in that: a first cylindrical roller bearing (4) is installed inside the front bearing body (5), and the first cylindrical roller bearing (4) is used for rotatably supporting the pump shaft (2); two sides of the first cylindrical roller bearing (4) are respectively limited and fixed through a first bearing end cover (3) and a second bearing end cover (6); one side of the inner ring of the first cylindrical roller bearing (4) is limited by a first bearing retaining sleeve (7).
3. The bearing body assembly structure of a multistage centrifugal pump according to claim 1, characterized in that: the second cylindrical roller bearing (10) is fixed in a bearing hole in the rear bearing body (12) through a second bearing end cover (9).
4. The bearing body assembly structure of a multistage centrifugal pump according to claim 1, characterized in that: the second cylindrical roller bearing (10) and the inner ring of one of the angular contact bearings (16) are mutually positioned and supported through a bearing positioning sleeve (11).
5. The bearing body assembly structure of a multistage centrifugal pump according to claim 1, characterized in that: and the matching end surfaces of the sleeve (15) and the third bearing end cover (13) are provided with positioning pins (18).
6. The bearing body assembly structure of a multistage centrifugal pump according to claim 1 or 5, characterized in that: a plurality of screw holes (19) arranged along the radial direction of the sleeve are processed on the sleeve (15), screws are mounted in the screw holes (19), and the tail ends of the screws are tightly propped against the outer ring of the angular contact bearing (16).
7. The bearing body assembly structure of a multistage centrifugal pump according to claim 1, characterized in that: and a rear mechanical seal gland (8) is arranged between the rear bearing body (12) and the pump shaft (2).
8. The bearing body assembly structure of a multistage centrifugal pump according to claim 1, characterized in that: the inner ring of the angular contact bearing (16) at the end of the pump shaft (2) is fixed through a round nut (17).
9. A method of assembling a bearing body assembly structure of a multistage centrifugal pump according to any one of claims 1 to 8, comprising the steps of:
firstly, a second cylindrical roller bearing (10) is matched and connected with a pump shaft (2), and the second cylindrical roller bearing (10) is integrally installed in a rear bearing body (12);
secondly, positioning and mounting the two groups of angular contact bearings (16) in the sleeve (15) in a back direction, and fixing the sleeve (15) and the outer ring of the angular contact bearing (16) through screws mounted in screw holes (19);
step three, integrally pressing the angular contact bearing (16) and the sleeve (15) at the end of the pump shaft (2); the sleeve is fixed through a round nut, and a certain gap is kept between the sleeve (15) and the mounting hole (14);
fourthly, the third bearing end cover (13) is in positioning fit with the sleeve (15) through a positioning pin (18), and the third bearing end cover (13) is fixed;
step five, after the assembly is finished, in the normal operation process of the pump shaft (2), the generated radial force is solely borne by the second cylindrical roller bearing (10); because the sleeve (15) and the mounting hole (14) are in clearance fit, the angular contact bearing (16) does not bear radial force at the moment and only bears axial force.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210549013.9A CN114909317A (en) | 2022-05-20 | 2022-05-20 | Bearing body assembly structure of multistage centrifugal pump and assembling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210549013.9A CN114909317A (en) | 2022-05-20 | 2022-05-20 | Bearing body assembly structure of multistage centrifugal pump and assembling method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114909317A true CN114909317A (en) | 2022-08-16 |
Family
ID=82769280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210549013.9A Pending CN114909317A (en) | 2022-05-20 | 2022-05-20 | Bearing body assembly structure of multistage centrifugal pump and assembling method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114909317A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201599234U (en) * | 2009-12-15 | 2010-10-06 | 上海邦浦实业集团有限公司 | Multistage centrifugal pump bearing arrangement |
| JP2012172801A (en) * | 2011-02-23 | 2012-09-10 | Nsk Ltd | Matched mounting angular contact ball bearing |
| CN202579279U (en) * | 2012-03-15 | 2012-12-05 | 长沙佳能通用泵业有限公司 | Device for combining horizontal type multi-stage pump rolling bearing |
| CN105298897A (en) * | 2015-11-20 | 2016-02-03 | 湖南省湘衡盐化有限责任公司 | Rear bearing of brine pump and cooling device of rear bearing |
| CN209875533U (en) * | 2019-04-09 | 2019-12-31 | 无锡艾比德泵业有限公司 | Rolling bearing combination device of horizontal multistage pump |
| CN215890564U (en) * | 2021-08-16 | 2022-02-22 | 江苏飞跃泵业股份有限公司 | Bearing box structure for pump |
| CN217558561U (en) * | 2022-05-20 | 2022-10-11 | 宜昌市西峡泵业有限公司 | Bearing body assembly structure of multistage centrifugal pump |
-
2022
- 2022-05-20 CN CN202210549013.9A patent/CN114909317A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201599234U (en) * | 2009-12-15 | 2010-10-06 | 上海邦浦实业集团有限公司 | Multistage centrifugal pump bearing arrangement |
| JP2012172801A (en) * | 2011-02-23 | 2012-09-10 | Nsk Ltd | Matched mounting angular contact ball bearing |
| CN202579279U (en) * | 2012-03-15 | 2012-12-05 | 长沙佳能通用泵业有限公司 | Device for combining horizontal type multi-stage pump rolling bearing |
| CN105298897A (en) * | 2015-11-20 | 2016-02-03 | 湖南省湘衡盐化有限责任公司 | Rear bearing of brine pump and cooling device of rear bearing |
| CN209875533U (en) * | 2019-04-09 | 2019-12-31 | 无锡艾比德泵业有限公司 | Rolling bearing combination device of horizontal multistage pump |
| CN215890564U (en) * | 2021-08-16 | 2022-02-22 | 江苏飞跃泵业股份有限公司 | Bearing box structure for pump |
| CN217558561U (en) * | 2022-05-20 | 2022-10-11 | 宜昌市西峡泵业有限公司 | Bearing body assembly structure of multistage centrifugal pump |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN217558561U (en) | Bearing body assembly structure of multistage centrifugal pump | |
| CN110439847B (en) | Centrifugal compressor shafting structure and centrifugal compressor | |
| CN210599549U (en) | Impeller anti-abrasion structure on water pump | |
| CN114909317A (en) | Bearing body assembly structure of multistage centrifugal pump and assembling method | |
| CN216894641U (en) | Gas turbine bearing casing structure | |
| CN114043215A (en) | Bearing eccentric adjusting mechanism based on in shaft transmission | |
| CN209881571U (en) | Motor rotor axial positioning structure and windscreen wiper motor | |
| CN218771547U (en) | Bearing structure of high-speed motor and high-speed centrifugal fan | |
| CN214304498U (en) | Compressor and air conditioner | |
| CN210565795U (en) | Bearing capable of preventing ring from running | |
| CN210738901U (en) | Rolling bearing mounting structure capable of being axially assembled and disassembled without damage | |
| CN216767837U (en) | Automatic axial force balancing device of environment-friendly maintenance-free double-suction split pump | |
| CN214727897U (en) | Novel omnidirectional wheel, mobile base and mobile robot | |
| CN217502088U (en) | Non-cantilever energy-saving centrifugal pump | |
| CN115111263B (en) | Split type gap automatic compensation bearing | |
| CN217652952U (en) | Single suction centrifugal pump capable of self-balancing axial force | |
| CN220264091U (en) | Tail chain wheel shaft assembly of scraper conveyor | |
| CN219062679U (en) | Integral manipulator wall-penetrating assembly | |
| CN217017970U (en) | Idler shaft with double-oil-film bearing for high-speed rolling mill | |
| CN217440346U (en) | Dynamic and static balancing device for water pump | |
| CN220929968U (en) | Rolling bearing with special fixing groove on outer ring | |
| CN220523057U (en) | Pin shaft assembly, arm support and engineering machinery | |
| CN220769991U (en) | Shaft sleeve group | |
| CN220118322U (en) | Oil-free lubrication anti-rotation vortex air compressor | |
| CN216150784U (en) | Spinning wheel chamber assembly for spinning machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |