CN111396316B - Double-suction pump with cylindrical roller bearing at driving side - Google Patents
Double-suction pump with cylindrical roller bearing at driving side Download PDFInfo
- Publication number
- CN111396316B CN111396316B CN202010174460.1A CN202010174460A CN111396316B CN 111396316 B CN111396316 B CN 111396316B CN 202010174460 A CN202010174460 A CN 202010174460A CN 111396316 B CN111396316 B CN 111396316B
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- driving side
- bearing
- shaft
- sleeve
- impeller
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- 238000007789 sealing Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D1/006—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps double suction pumps
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- 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
- F04D29/0467—Spherical bearings
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- 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
- F04D29/049—Roller bearings
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- 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
- F04D29/08—Sealings
- F04D29/086—Sealings especially adapted for liquid pumps
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- 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
- F04D29/18—Rotors
- F04D29/20—Mounting rotors on shafts
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- 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
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2205—Conventional flow pattern
- F04D29/2222—Construction and assembly
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to a double-suction pump with a cylindrical roller bearing at the driving side; comprising the following steps: the device comprises a driving side bearing, a bearing retaining sleeve, a shaft sleeve, a flat key, an impeller, a pump shaft, a non-driving side bearing, a gasket and a round nut, wherein the impeller is fixedly arranged on the pump shaft through the flat key; the non-driving side bearing is fixed on the non-driving side of the pump shaft through a round nut, the shaft sleeve is sleeved on the pump shaft at two sides of the impeller, a bearing stop sleeve is arranged between the shaft sleeve and the driving side bearing, a bearing stop sleeve is arranged between the shaft sleeve and the non-driving side bearing, and the driving side bearing is a driving side cylindrical roller bearing; the shaft sleeve is matched with the impeller in a spigot matched mode; the diameter of the bearing retainer and the shaft sleeve is smaller than the shaft diameter of the driving side bearing. The invention can improve the strength of the pump shaft, reduce the risk of shaft breakage and prolong the service life of the pump.
Description
Technical Field
The invention relates to a double-suction pump, in particular to a double-suction pump with a cylindrical roller bearing on the driving side, which can improve the strength of a pump shaft, reduce the risk of shaft breakage and prolong the service life of the pump.
Background
The single-stage double-suction horizontal centrifugal pump is widely applied to occasions such as urban water supply and drainage, central heating, steel works, power plants and stations, petrochemical industry, water supply of air conditioning systems, farm irrigation and the like, and is characterized by high lift, large flow and convenient maintenance; the structure is symmetrical, the axial force in the running process is very small, and the running is stable.
The structural mode of the rotor component of the horizontal split double suction pump is characterized in that: the driving side and the non-driving side adopt deep groove ball bearings; the bearing on the driving side is positioned by virtue of the retainer ring and the shaft shoulder. The shaft is provided with grooves due to the fact that the check rings are required to be installed. In actual operation, stress concentration is easy to occur at the groove, and the strength of the shaft is reduced; when the pump is operated under off-design conditions, the radial forces experienced by the rotor components increase. Under the action of the two factors, the pump shaft is broken and the like when serious, so that the service life of the pump is shortened.
Disclosure of Invention
The invention aims to solve the problems, and the main purpose of the invention is to provide a double-suction pump which can improve the strength of a pump shaft, reduce the risk of shaft breakage and prolong the service life of the pump and adopts a cylindrical roller bearing on the driving side.
The invention solves the technical problems by the following technical proposal: a double suction pump with a cylindrical roller bearing at the driving side; the double suction pump with the cylindrical roller bearing at the driving side comprises: the device comprises a driving side bearing, a bearing retaining sleeve, a shaft sleeve, a flat key, an impeller, a pump shaft, a non-driving side bearing, a gasket and a round nut, wherein the impeller is fixedly arranged on the pump shaft through the flat key; the non-driving side bearing is fixed on the non-driving side of the pump shaft through a round nut, the shaft sleeve is sleeved on the pump shaft at two sides of the impeller, a bearing stop sleeve is arranged between the shaft sleeve and the driving side bearing, a bearing stop sleeve is arranged between the shaft sleeve and the non-driving side bearing, and the driving side bearing is a driving side cylindrical roller bearing; the shaft sleeve is matched with the impeller in a spigot matched mode; the diameter of the bearing retainer and the shaft sleeve is smaller than the shaft diameter of the driving side bearing.
In a specific embodiment of the present invention; the non-drive side bearing is a non-drive side deep groove ball bearing.
In a specific embodiment of the present invention; a sealing ring is arranged between the bearing retaining sleeve and the shaft sleeve.
In a specific embodiment of the present invention; the section of the matching part of the shaft sleeve and the impeller is an L-shaped step, and the impeller is provided with a step-shaped spigot matched with the L-shaped step on the shaft sleeve.
The invention has the positive progress effects that: the double-suction pump with the cylindrical roller bearing at the driving side has the following advantages: the double-suction pump with the cylindrical roller bearing at the driving side can improve the strength of the pump shaft, reduce the risk of shaft breakage and prolong the service life of the pump.
Drawings
Fig. 1 is a schematic diagram of a rotor structure of a conventional double suction pump.
Fig. 2 is a schematic view showing a structure of a conventional driving side bearing of a double suction pump.
Fig. 3 is a schematic diagram of a rotor structure of a double suction pump according to the present invention.
Fig. 4 is a schematic view showing a rotor structure at a driving side bearing of the double suction pump of the present invention.
The following are names corresponding to the reference numerals in the present invention:
The device comprises a flat key 1, an elastic retainer ring 2 for a shaft, a driving side deep groove ball bearing 3, a driving side cylindrical roller bearing 3', a bearing retaining sleeve 4, a shaft sleeve 5, a flat key 6, an impeller 7, a pump shaft 8, a non-driving side deep groove ball bearing 9, a gasket 10 and a round nut 11.
Detailed Description
The following description of the preferred embodiments of the present invention is given with reference to the accompanying drawings, so as to explain the technical scheme of the present invention in detail.
The invention aims to solve the problems in the background technology and provides a novel rotor component structure of a double-suction pump, which improves the strength of a pump shaft. Fig. 1 is a schematic diagram of a rotor structure of a conventional double suction pump. Fig. 2 is a schematic view showing a structure of a conventional driving side bearing of a double suction pump. As shown in fig. 1-2: the original rotor component mainly comprises a flat key 1, an elastic retainer ring 2 for a shaft, a driving side deep groove ball bearing 3, a bearing retaining sleeve 4, a shaft sleeve 5, a flat key 6, an impeller 7, a pump shaft 8 and a non-driving side deep groove ball bearing 9; the gasket 10, the round nut 11 and other parts. The positioning mode of the rotor component mainly depends on the positions of the driving side deep groove ball bearings 3 positioned by the elastic retainer ring 2 and the shaft shoulder, then the axial positions of the bearing retaining sleeve 4, the impeller 7, the shaft sleeve 8 and the non-driving side deep groove ball bearings 9 are sequentially determined by taking the bearings as the reference from the driving side deep groove ball bearings 3, and finally the non-driving side deep groove ball bearings 9 are locked by the round nuts 11 and the gaskets 10, so that the position positioning of the rotor component is completed.
The invention is modified based on the original rotor component structure, as shown in figures 3-4: the double suction pump with a cylindrical roller bearing at the driving side provided by the invention comprises: the driving side bearing, the bearing retaining sleeve 4, the shaft sleeve 5, the flat key 6, the impeller 7, the pump shaft 8, the non-driving side deep groove ball bearing 9, the gasket 10 and the round nut 11, wherein the impeller 7 is fixedly arranged on the pump shaft 8 through the flat key 6; the non-driving side deep groove ball bearing 9 is fixed on the non-driving side of the pump shaft 8 through a round nut 11, the shaft sleeve 5 is sleeved on the pump shaft 8 at two sides of the impeller 7, the bearing retaining sleeve 4 is arranged between the shaft sleeve 5 and the driving side bearing, the bearing retaining sleeve 4 is arranged between the shaft sleeve 5 and the non-driving side deep groove ball bearing 9, and the driving side bearing is a driving side cylindrical roller bearing 3'; the shaft sleeve 5 and the impeller 7 are matched in a spigot matching mode; the diameter of the bearing housing 4 and the bushing 5 is smaller than the diameter of the shaft where the drive side bearing is mounted. A sealing ring is arranged between the bearing baffle sleeve 4 and the shaft sleeve 5.
The section of the matching part of the shaft sleeve 5 and the impeller 7 is an L-shaped step, and the impeller 7 is provided with a step-shaped spigot matched with the L-shaped step on the shaft sleeve 5.
According to the invention, a cylindrical roller bearing is used for replacing a deep groove ball bearing used on a driving side, a positioning structure of an elastic retainer ring 2 for a shaft is omitted, the shaft diameter of the driving side bearing and the shaft extension is increased, the axial positions of a bearing retaining sleeve 4, a shaft sleeve 5, an impeller 7 and a non-driving side deep groove ball bearing 9 are sequentially determined by taking a shaft shoulder as a reference, the end face matching of the impeller and the shaft sleeve is changed into spigot matching, and finally, the non-driving side deep groove ball bearing 9 is locked by a round nut 11 and a washer 10, so that the position positioning of a rotor part is completed, one part is reduced, and the strength of the shaft is also improved.
According to the reinforcing structure of the rotor component of the double-suction pump, the shaft diameter of the driving side bearing is increased on the basis of the original rotor component, so that the shaft diameter of the driving side bearing is larger than that of the left bearing retaining sleeve 4, meanwhile, the diameter of the shaft extension is also increased, the cylindrical roller bearing is used for replacing the deep groove ball bearing of the driving side, the structures of the shaft sleeve 5 and the impeller 7 are also adjusted, the end face matching is changed into spigot matching, the strength of the shaft is enhanced, the bearing capacity of the rotor component is improved, meanwhile, the assembly size is also ensured, and the original bearing box body and other parts can be directly used continuously.
The part which is canceled on the basis of the original parts is the elastic retainer ring 2 for the shaft. The parts to be replaced are as follows: pump shaft 8, driving side deep groove ball bearing 3, flat key 1. The parts for modifying the model based on the original parts are as follows: an impeller 7 and a sleeve 5.
In the original structure, in order to install the circlip for the shaft, a groove is required to be reserved on the shaft, the surface runout and the circular runout of the groove surface are both required to be clear, in the practical operation, stress concentration is easy to occur at the groove, the strength of the shaft is reduced, the groove is eliminated in the new structure, the diameter of the shaft is enlarged, the diameter of the shaft extension is increased, and the specification of keys at the coupling is increased, as shown in figures 2 and 4. In the original structure, the diameter of the bearing retainer is larger than the shaft diameter (D1 > D2) of the installation driving side bearing; in the novel structure, the diameter of the bearing retainer is smaller than the shaft diameter of the driving side bearing (D1 is smaller than D3). Thus, the processing amount is reduced, and the strength of the shaft is improved. In the original structure, the driving side bearing adopts the driving side deep groove ball bearing 3, and when the pump runs under the rated working condition, the radial force born by the structural characteristic is smaller, but in the actual running process, the situation of deviating from the working condition also occurs frequently, and the radial force born by the pump is relatively larger. The novel structure replaces the deep groove ball bearing 3 on the driving side by the cylindrical roller bearing 3', the radial load bearing capacity is increased, and the strength of the pump shaft is further improved. In the original structure, the bearing 3 at the driving side is positioned by virtue of the retainer ring 2 and the shaft shoulder, the shaft sleeve and the impeller are of an end face matching structure, in the new structure, the shaft diameter is increased to cause the change of the positioning mode of rotor parts, the shaft shoulder can directly position the axial position of the bearing retaining sleeve 4, the shaft sleeve and the impeller are matched by the spigot, and after the parts such as the bearing retaining sleeve 4, the shaft sleeve 5, the impeller 7 and the like are installed, the non-driving side deep groove ball bearing 9 is installed. Thus, the positioning reliability is ensured, and the operation reliability is improved.
The foregoing has shown and described the basic principles and main features of the present invention and the advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the foregoing embodiments, which have been described in the foregoing embodiments and description merely illustrates the principles of the invention, and that various changes and modifications may be effected therein without departing from the spirit and scope of the invention as defined in the appended claims and their equivalents.
Claims (1)
1. A double suction pump with a cylindrical roller bearing at the driving side is characterized in that: the double suction pump with the cylindrical roller bearing at the driving side comprises: the device comprises a driving side bearing, a bearing retaining sleeve, a shaft sleeve, a flat key, an impeller, a pump shaft, a non-driving side bearing, a gasket and a round nut, wherein the impeller is fixedly arranged on the pump shaft through the flat key; the non-driving side bearing is fixed on the non-driving side of the pump shaft through a round nut, the shaft sleeve is sleeved on the pump shaft at two sides of the impeller, a bearing stop sleeve is arranged between the shaft sleeve and the driving side bearing, a bearing stop sleeve is arranged between the shaft sleeve and the non-driving side bearing, and the driving side bearing is a driving side cylindrical roller bearing; the shaft sleeve is matched with the impeller in a spigot matched mode; the diameters of the bearing baffle sleeve and the shaft sleeve are smaller than the shaft diameter of the position where the driving side bearing is arranged;
The non-driving side bearing is a non-driving side deep groove ball bearing;
a sealing ring is arranged between the bearing retaining sleeve and the shaft sleeve;
The section of the matching part of the shaft sleeve and the impeller is an L-shaped step, and the impeller is provided with a step-shaped spigot matched with the L-shaped step on the shaft sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010174460.1A CN111396316B (en) | 2020-03-13 | 2020-03-13 | Double-suction pump with cylindrical roller bearing at driving side |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010174460.1A CN111396316B (en) | 2020-03-13 | 2020-03-13 | Double-suction pump with cylindrical roller bearing at driving side |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111396316A CN111396316A (en) | 2020-07-10 |
| CN111396316B true CN111396316B (en) | 2024-05-17 |
Family
ID=71434519
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010174460.1A Active CN111396316B (en) | 2020-03-13 | 2020-03-13 | Double-suction pump with cylindrical roller bearing at driving side |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111396316B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201896756U (en) * | 2010-11-23 | 2011-07-13 | 安徽省天马泵阀集团有限公司 | Dual-suction centrifugal pump |
| CN205036590U (en) * | 2015-09-25 | 2016-02-17 | 江苏新泰泵阀制造有限公司 | Multistage centrifugal pump rotor equipment |
| CN206738172U (en) * | 2017-03-14 | 2017-12-12 | 大连双龙泵业制造有限公司 | A kind of horizontal double-suction centrifugal pump pump configuration |
| CN207701439U (en) * | 2017-12-27 | 2018-08-07 | 广州市白云泵业集团有限公司 | A kind of vertical double suction pump and double suction pump group part |
| CN208651178U (en) * | 2018-07-26 | 2019-03-26 | 辽宁通达泵业集团有限公司 | A kind of energy saving centrifugal multistage pump multiple centrifugal pump of no balancing drum, balancing frame |
| CN212155167U (en) * | 2020-03-13 | 2020-12-15 | 上海凯泉泵业（集团）有限公司 | Double-suction pump with cylindrical roller bearing on driving side |
-
2020
- 2020-03-13 CN CN202010174460.1A patent/CN111396316B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201896756U (en) * | 2010-11-23 | 2011-07-13 | 安徽省天马泵阀集团有限公司 | Dual-suction centrifugal pump |
| CN205036590U (en) * | 2015-09-25 | 2016-02-17 | 江苏新泰泵阀制造有限公司 | Multistage centrifugal pump rotor equipment |
| CN206738172U (en) * | 2017-03-14 | 2017-12-12 | 大连双龙泵业制造有限公司 | A kind of horizontal double-suction centrifugal pump pump configuration |
| CN207701439U (en) * | 2017-12-27 | 2018-08-07 | 广州市白云泵业集团有限公司 | A kind of vertical double suction pump and double suction pump group part |
| CN208651178U (en) * | 2018-07-26 | 2019-03-26 | 辽宁通达泵业集团有限公司 | A kind of energy saving centrifugal multistage pump multiple centrifugal pump of no balancing drum, balancing frame |
| CN212155167U (en) * | 2020-03-13 | 2020-12-15 | 上海凯泉泵业（集团）有限公司 | Double-suction pump with cylindrical roller bearing on driving side |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111396316A (en) | 2020-07-10 |
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