CN111396367A - Drag-reducing wear-resistant slurry pump volute - Google Patents
Drag-reducing wear-resistant slurry pump volute Download PDFInfo
- Publication number
- CN111396367A CN111396367A CN202010391863.1A CN202010391863A CN111396367A CN 111396367 A CN111396367 A CN 111396367A CN 202010391863 A CN202010391863 A CN 202010391863A CN 111396367 A CN111396367 A CN 111396367A
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- air
- ring block
- casing
- wall
- volute
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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
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps 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
- F04D29/007—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
- F04D29/60—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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
- F04D7/04—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous
- F04D7/045—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous with means for comminuting, mixing stirring or otherwise treating
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a volute of a drag-reducing and wear-resisting slurry pump, which comprises a shell, wherein a flow passage of the shell is a flow passage curved surface, the flow passage curved surface is of an arc structure, a mounting hole for mounting a one-way air inlet valve is formed in the shell, an air injection ring block for injecting air into the flow passage is embedded in the inner wall of the flow passage of the shell, the air injection ring block is hermetically connected with the one-way air inlet valve, and the inner wall of the air injection ring block corresponds to and is flush with. By utilizing the principle of gas film resistance reduction, the gas injection ring block is embedded in the inner wall of the volute flow channel of the slurry pump, and the injected gas is attached to the whole volute flow channel under the driving of high-speed rotation of slurry, so that a layer of uniform gas film is formed between the slurry and the inner wall of the volute flow channel, the erosion of the slurry to the inner wall of the flow channel is reduced, the slurry conveying efficiency in the volute is improved, and the gas film resistance and wear resistance double-layer effect is achieved.
Description
Technical Field
The invention relates to the technical field of centrifugal slurry pumps, in particular to a volute of a drag-reducing and wear-resistant slurry pump.
Background
The centrifugal slurry pump is a solid-liquid impurity pump which is most widely applied, is widely applied to various fields of national economy such as mining industry, metallurgy, water conservancy, petroleum, chemical engineering, environmental protection, river channel dredging and the like, a volute is one of core components, and is also one of overflowing components which are most seriously worn in the process of conveying slurry materials, the economic loss caused by the abrasion is huge, and the good volute can be designed and manufactured to improve the wear resistance and the efficiency.
Chinese patent No. CN208950968U discloses a wear-resistant silicon carbide ceramic volute, wherein a wear-resistant inner lining layer is fixedly arranged on the inner wall of the casing, and the wear-resistant inner lining layer is made of a silicon carbide ceramic material. However, ceramic materials are very fragile, are very easy to crack under the impact of solid particles, and are not easy to use under the working conditions of high concentration and strong particle impact, so that the application range of the ceramic materials is limited, and the effect is not obvious in the aspect of efficiency improvement.
Disclosure of Invention
In order to overcome the problems in the prior art, the invention provides a volute of a drag-reducing and wear-resistant slurry pump. By utilizing the principle of gas film resistance reduction, the gas injection ring block is embedded in the inner wall of the volute flow channel of the slurry pump, and the injected gas is attached to the whole volute flow channel under the driving of high-speed rotation of slurry, so that a layer of uniform gas film is formed between the slurry and the inner wall of the volute flow channel, the erosion of the slurry to the inner wall of the flow channel is reduced, the slurry conveying efficiency in the volute is improved, and the gas film resistance and wear resistance double-layer effect is achieved.
The technical scheme adopted by the invention for solving the technical problems is as follows: the volute casing of the drag-reducing and wear-resisting slurry pump comprises a casing, wherein a flow channel of the casing is a flow channel curved surface, the flow channel curved surface is of an arc-shaped structure, a mounting hole for mounting a one-way air inlet valve is formed in the casing, an air injection ring block for injecting air into the flow channel is embedded in the inner wall of the flow channel of the casing, the air injection ring block is connected with the one-way air inlet valve in a sealing mode, and the inner wall of the air injection ring block corresponds.
Furthermore, an annular groove is formed in the inner wall of the flow channel of the shell, and the air injection ring block is embedded and fixed in the annular groove.
Furthermore, damping cotton is arranged between the air injection ring block and the annular groove, and the damping cotton is tightly attached to the annular groove and the air injection ring block.
Furthermore, the air injection ring block comprises a ring block body, an air injection ring block air inlet is formed in the outer wall of the air injection ring block and communicated with the one-way air inlet valve, an air cavity is formed in the ring block body and communicated with the air injection ring block air inlet, and the air cavity is communicated with the flow channel through a one-way air outlet valve arranged on the inner wall of the air injection ring block.
Furthermore, a plurality of one-way air outlet valves are uniformly arranged on the inner wall of the air injection ring block.
Furthermore, the one-way air outlet valve is composed of a valve body II, a valve core II and a spring II, the one-way air outlet valve is communicated with the air cavity through an air inlet II and is communicated with the flow channel through an air outlet II, and the air outlet II is a circular nozzle or a rectangular gap nozzle.
Furthermore, the air outlet direction of the air outlet II forms an angle of 10-45 degrees relative to the section of the mounting hole position vertical to the axis of the shell.
Furthermore, the one-way air inlet valve is installed in the installation hole of the shell, an air inlet I of the one-way air inlet valve is connected with an air pipe on the outer side of the shell, and the air pipe is used for ventilating the one-way air inlet valve.
Furthermore, the one-way air inlet valve is composed of a valve body I, a valve core I and a spring I.
Furthermore, a plurality of air injection ring blocks for injecting air to the flow passage are uniformly embedded in the inner wall of the flow passage of the shell.
In summary, the technical scheme of the invention has the following beneficial effects:
(1) the gas film resistance reduction principle is applied to resistance reduction and wear resistance of the volute of the slurry pump, so that the conveying efficiency of the slurry can be improved, and the erosion of the slurry to the flow passage component of the volute can be reduced.
(2) The embedded arrangement of the air injection ring block in the shell effectively avoids occupying the volute flow channel space and reduces the resistance.
(3) The air injection ring block is convenient to mount and dismount, so that the working condition application range of the slurry pump is wider.
Drawings
FIG. 1 is a cross-sectional view of a volute of a drag reducing and wear resistant slurry pump of the present invention;
FIG. 2 is an enlarged view of a portion of the volute of the present invention;
FIG. 3 is a three-dimensional view of the volute of the present invention;
FIG. 4 is a three-dimensional view of the volute annular groove of the present invention;
FIG. 5 is a three-dimensional view of the gas injection ring of the present invention;
fig. 6 is a cross-sectional view of the housing of the present invention.
In the figure:
the damping valve comprises a shell 1, a shell 2, an air inlet, a one-way air inlet valve 3, a valve body I3, a valve core I3, a spring I3, a sealing ring I4, damping cotton 5, an air injection ring block air inlet 5, an air cavity 6, a one-way air outlet valve 7, a valve body II 7, a valve core II 7, a spring II 7, a sealing ring II 7, an air outlet II 7, an installation hole 8, an annular groove 9, a flow channel 10, a volute outlet 11, a first cross section 12, a second cross section 13, a third cross section 14, an air pipe 15, a fourth cross section 16 and an air injection port 17.
Detailed Description
The features and principles of the present invention will be described in detail below with reference to the accompanying drawings, which illustrate embodiments of the invention and are not intended to limit the scope of the invention.
As shown in fig. 1 to 6, the volute of the drag-reducing and wear-resistant slurry pump comprises a shell 1, an air inlet 2, a one-way air inlet valve 3, damping cotton 4, an air injection ring block 5, an air cavity 6, a one-way air outlet valve 7, a mounting hole 8, an air pipe 15 and an air injection port 17.
As shown in fig. 6, for convenience of description, four sections on the shell are defined, namely a first section 12, a second section 13, a third section 14 and a fourth section 16, and the four sections divide the shell into four equal parts, and each section is perpendicular to the shell 1.
The one-way air inlet valve 3 is in threaded sealing connection with the first section 12, the second section 13, the third section 14 and the fourth section 16 of the shell 1, so that four air inlets 2 are formed on the shell 1, and the four air inlets 2 are communicated with the air pipe 15.
Specifically, the one-way air inlet valve is composed of a valve body I3-1, a valve core I3-2 and a spring I3-3, and a sealing ring I3-4 is arranged between the one-way air inlet valve 3-1 and the air injection ring block 5. The one-way air inlet valve 3 is arranged in the mounting hole of the shell 1, an air inlet I of the one-way air inlet valve 3 is connected with an air pipe 15 on the outer side of the shell, and the air pipe 15 is used for ventilating the one-way air inlet valve 3. The provision of a plurality of one-way inlet valves 3 ensures adequate gas injection within the volute flow path 10.
The mounting holes 8 are respectively arranged on the side edges of the air injection ring block 5 and the shell 1. The air injection ring block 5 comprises a ring block body, an air injection ring block air inlet 5-1 is formed in the outer wall of the air injection ring block 5, the air injection ring block air inlet 5-1 is communicated with the one-way air inlet valve 3, an air cavity 6 is formed in the ring block body, the air cavity 6 is communicated with the air injection ring block air inlet 5-1, and the air cavity 6 is communicated with a flow channel through a one-way air outlet valve 7 arranged on the inner wall of the air injection ring block 5.
The annular air cavity 6 is arranged in the air injection ring block 5, so that the coating area of air on the flow channel is increased, and the flow obstruction of the wall surface of the flow channel to the slurry and the impact of the slurry on the wall surface of the flow channel are reduced to the maximum extent.
The flow surface of the air injection ring block 5 is the same as the curved surface of the inner wall of the volute flow channel. By utilizing the principle of gas film resistance reduction, the gas injection ring block 5 is embedded in the inner wall of the volute flow channel of the slurry pump, and the sprayed gas is attached to the whole volute flow channel under the driving of high-speed rotation of slurry, so that a layer of uniform gas film is formed between the slurry and the inner wall of the volute flow channel, the erosion of the slurry to the inner wall of the flow channel is reduced, the slurry conveying efficiency in the volute is improved, and the gas film resistance and wear resistance double-layer effect is achieved.
An annular groove 9 is arranged in a flow passage 10 of the shell 1, and the annular groove 9 is respectively arranged at a first section 12, a second section 13, a third section 14 and a fourth section 16. The air injection ring block 5 is embedded in the annular groove 9, and the damping cotton 4 is filled between the annular groove 9 and the air injection ring block 5 and is in threaded connection with the shell 1 through the mounting hole 8. The vibration caused by the hydraulic impact of the slurry can be effectively reduced, the working stability of the air injection ring block 5 is ensured, and the installation error of the air injection ring block is reduced.
The annular groove 9 and the housing 1 may be integrally cast or the housing 1 may be post-processed with the annular groove 9.
The one-way air inlet valve 3 is hermetically connected with the air injection ring block 5 through an air injection ring block air inlet 5-1 and is communicated with the air cavity 6. The air chamber 6 is annular and can surround the entire volute flow passage 10. A plurality of one-way air outlet valves 7 are arranged on the inner side of the air injection ring block 5, and the one-way air outlet valves 7 are in threaded sealing connection with the air injection ring block, so that slurry in a flow channel is prevented from entering a hollow air cavity, and the air injection ring block is damaged.
The one-way air outlet valve 7 consists of a valve body II 7-1, a valve core II 7-2 and a spring II 7-3, and the one-way air outlet valve 7 is hermetically connected with the air injection ring block 5 through a sealing ring II 7-4. The one-way air outlet valve 7 is communicated with the air cavity 6 through an air inlet II and is communicated with the flow channel 10 through an air outlet II 7-5, and the air outlet II is a circular nozzle or a rectangular gap nozzle. The air injection angle of the air outlet 7-5 forms an included angle of 10-45 degrees relative to the volute flow channel 10, and can be flexibly arranged according to different working conditions. The air outlet 7-5 can be a circular nozzle or a rectangular gap nozzle.
During operation, gas enters the gas pipe 15 from the gas injection port 17, flows through the gas inlet 2 at the first section 12, the second section 13, the third section 14 and the fourth section 16 in sequence, flows into the one-way gas inlet valve 7 from the gas inlet 2, and then flows into the gas cavity 6 through the valve core I3-2 compression spring I3-3 under the action of gas pressure. Similarly, under the action of the gas pressure in the gas cavity 6, the gas is compressed by the spring II 7-3 through the valve core II 7-2 and then is injected into the flow channel 10. When the slurry pump works, the impeller rotates, slurry rotates in the flow channel 10 under the action of centrifugal force and flows out from the volute outlet 11, and meanwhile, gas is attached to the inner wall of the whole flow channel 10 under the driving of slurry rotation, so that the erosion of the slurry to the inner wall of the flow channel 10 is isolated.
The invention utilizes the principle of gas film resistance reduction, and the gas injection ring block is embedded in the inner wall of the volute flow channel of the slurry pump, and the injected gas is attached to the whole volute flow channel under the driving of high-speed rotation of slurry, so that a layer of uniform gas film is formed between the slurry and the inner wall of the volute flow channel, the erosion of the slurry to the inner wall of the flow channel is reduced, the slurry conveying efficiency in the volute is improved, and the gas film type volute has the double-layer effects of resistance reduction and wear resistance.
The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the present invention by those skilled in the art without departing from the spirit of the present invention are intended to be covered by the protection scope defined by the claims of the present invention.
Claims (10)
1. The utility model provides a sediment stuff pump spiral case that resistance drag wear-resistants, includes the casing, and the runner of casing is the runner curved surface, and the runner curved surface is the arc structure, and its characterized in that is equipped with the mounting hole of installation one-way admission valve on the casing, and the runner inner wall of casing inlays and is fixed with the jet-propelled ring block of jet-propelled to the runner, and jet-propelled ring block and one-way admission valve sealing connection, and the inner wall of jet-propelled ring block corresponds and the parallel and level with runner.
2. The volute casing of the drag-reducing and wear-resistant slurry pump as claimed in claim 1, wherein the inner wall of the flow passage of the casing is provided with an annular groove, and the air injection ring block is embedded in the annular groove.
3. The volute casing of the drag-reducing and wear-resistant slurry pump as claimed in claim 2, wherein damping cotton is disposed between the annular groove and the jet ring block, and the damping cotton is closely attached to the annular groove and the jet ring block.
4. The volute casing of the drag-reducing and wear-resistant slurry pump as claimed in claim 1, wherein the air injection ring block comprises a ring block body, the outer wall of the air injection ring block is provided with an air injection ring block air inlet, the air injection ring block air inlet is communicated with the one-way air inlet valve, an air cavity is arranged inside the ring block body and is communicated with the air injection ring block air inlet, and the air cavity is communicated with the flow passage through a one-way air outlet valve arranged on the inner wall of the air injection ring block.
5. The volute casing of the drag-reducing and wear-resistant slurry pump as claimed in claim 4, wherein the inner wall of the air injection ring block is uniformly provided with a plurality of one-way air outlet valves.
6. The volute casing of the drag-reducing and wear-resistant slurry pump as claimed in claim 4 or 5, wherein the one-way air outlet valve is composed of a valve body II, a valve core II and a spring II, the one-way air outlet valve is communicated with the air cavity through an air inlet II and is communicated with the flow channel through an air outlet II, and the air outlet II is a circular nozzle or a rectangular gap nozzle.
7. The volute casing of the drag-reducing and wear-resistant slurry pump according to claim 6, wherein the air outlet direction of the air outlet II forms an angle of 10-45 degrees with respect to the section perpendicular to the axis of the casing at the position of the mounting hole.
8. The volute casing of the drag-reducing and wear-resistant slurry pump as claimed in claim 1, wherein the one-way air intake valve is installed in the installation hole of the casing, an air inlet hole i of the one-way air intake valve is connected with an air pipe outside the casing, and the air pipe supplies air to the one-way air intake valve.
9. The volute casing of the drag-reducing and wear-resistant slurry pump as claimed in claim 1 or 8, wherein the one-way air inlet valve is composed of a valve body I, a valve core I and a spring I.
10. The volute casing of the drag-reducing and wear-resistant slurry pump as claimed in claim 1, wherein a plurality of air injection ring blocks for injecting air to the flow passage are uniformly embedded in the inner wall of the flow passage of the casing.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010391863.1A CN111396367A (en) | 2020-05-11 | 2020-05-11 | Drag-reducing wear-resistant slurry pump volute |
| PCT/CN2020/106926 WO2021227263A1 (en) | 2020-05-11 | 2020-08-05 | Resistance-reduction and abrasion-resistance slurry pump volute |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010391863.1A CN111396367A (en) | 2020-05-11 | 2020-05-11 | Drag-reducing wear-resistant slurry pump volute |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111396367A true CN111396367A (en) | 2020-07-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010391863.1A Pending CN111396367A (en) | 2020-05-11 | 2020-05-11 | Drag-reducing wear-resistant slurry pump volute |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN111396367A (en) |
| WO (1) | WO2021227263A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021227263A1 (en) * | 2020-05-11 | 2021-11-18 | 山东省章丘鼓风机股份有限公司 | Resistance-reduction and abrasion-resistance slurry pump volute |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4873913A (en) * | 1986-09-12 | 1989-10-17 | Helix Technology Corporation | Dry roughing pump having a gas film bearing |
| CN1108733A (en) * | 1994-03-14 | 1995-09-20 | 潘代发 | Air-cushion vane turbine system of gas turbine |
| JPH08312641A (en) * | 1995-05-15 | 1996-11-26 | Mitsubishi Heavy Ind Ltd | Dynamic pressure gas bearing |
| CN202719330U (en) * | 2012-05-14 | 2013-02-06 | 北京北方微电子基地设备工艺研究中心有限责任公司 | Anti-corrosion and anti-deposition vacuum pipeline and microelectronic equipment with same |
| CN104100299A (en) * | 2013-04-12 | 2014-10-15 | 北京星旋世纪科技有限公司 | Rotating device, fluid motor, engine, compressor and pump using same |
| CN106321461A (en) * | 2014-07-31 | 2017-01-11 | 吴小再 | Wear and impact resistance submersible pump |
| CN208138674U (en) * | 2018-03-22 | 2018-11-23 | 新能能源有限公司 | A kind of strength protection wear-resistant bend |
| CN209976892U (en) * | 2019-04-25 | 2020-01-21 | 石家庄凯恩机械有限公司 | Slurry pump volute with wear-resistant ceramic insert |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104179710B (en) * | 2014-07-31 | 2016-10-12 | 苏州海而仕信息科技有限公司 | Immersible pump |
| CN111396367A (en) * | 2020-05-11 | 2020-07-10 | 山东省章丘鼓风机股份有限公司 | Drag-reducing wear-resistant slurry pump volute |
-
2020
- 2020-05-11 CN CN202010391863.1A patent/CN111396367A/en active Pending
- 2020-08-05 WO PCT/CN2020/106926 patent/WO2021227263A1/en active Application Filing
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4873913A (en) * | 1986-09-12 | 1989-10-17 | Helix Technology Corporation | Dry roughing pump having a gas film bearing |
| CN1108733A (en) * | 1994-03-14 | 1995-09-20 | 潘代发 | Air-cushion vane turbine system of gas turbine |
| JPH08312641A (en) * | 1995-05-15 | 1996-11-26 | Mitsubishi Heavy Ind Ltd | Dynamic pressure gas bearing |
| CN202719330U (en) * | 2012-05-14 | 2013-02-06 | 北京北方微电子基地设备工艺研究中心有限责任公司 | Anti-corrosion and anti-deposition vacuum pipeline and microelectronic equipment with same |
| CN104100299A (en) * | 2013-04-12 | 2014-10-15 | 北京星旋世纪科技有限公司 | Rotating device, fluid motor, engine, compressor and pump using same |
| CN106321461A (en) * | 2014-07-31 | 2017-01-11 | 吴小再 | Wear and impact resistance submersible pump |
| CN208138674U (en) * | 2018-03-22 | 2018-11-23 | 新能能源有限公司 | A kind of strength protection wear-resistant bend |
| CN209976892U (en) * | 2019-04-25 | 2020-01-21 | 石家庄凯恩机械有限公司 | Slurry pump volute with wear-resistant ceramic insert |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021227263A1 (en) * | 2020-05-11 | 2021-11-18 | 山东省章丘鼓风机股份有限公司 | Resistance-reduction and abrasion-resistance slurry pump volute |
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| Publication number | Publication date |
|---|---|
| WO2021227263A1 (en) | 2021-11-18 |
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Application publication date: 20200710 |
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