CN217682296U - Guide vane type low-pressure water coal slurry pump - Google Patents
Guide vane type low-pressure water coal slurry pump Download PDFInfo
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- CN217682296U CN217682296U CN202221471768.3U CN202221471768U CN217682296U CN 217682296 U CN217682296 U CN 217682296U CN 202221471768 U CN202221471768 U CN 202221471768U CN 217682296 U CN217682296 U CN 217682296U
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Abstract
The utility model provides a stator formula low pressure water coal stuff pump inhales cantilever type centrifugal pump for vertical single-stage list, including pump mount, the cover body, with cover body coupling's inlet elbow and inlet nozzle stub, play water section the play water section inboard is equipped with the stator, and the impeller sets up the stator is inboard, the impeller passes through the pump shaft, impeller upper portion is equipped with hinders and seals the impeller, hinders and seals impeller upper portion and be equipped with the axle sleeve, it is equipped with out the water nozzle stub outward to go out the water section, it is equipped with pump cover and upper portion and hinders and seal the stator to go out water section lower part, it is equipped with the intermediate strut to hinder and seal stator upper portion, collection dress formula mechanical seal subassembly is fixed on the intermediate strut and with the axle sleeve overlap joint, intermediate strut upper portion is equipped with bearing unit, the bearing is equipped with in the bearing unit, the bearing unit dress is on the pump shaft to it is fixed with round nut locking, impeller and hinder and seal the impeller dress on the pump shaft bearing unit upper portion be equipped with motor support, motor support upper portion is equipped with the motor, the motor passes through the shaft coupling assembly with the pump shaft coupling.
Description
Technical Field
The utility model relates to a centrifugal pump field especially relates to a stator formula low pressure water coal stuff pump.
Background
The low-pressure water coal slurry pump is one of the important coal slurry conveying devices in the coal slurry gasification process, and the normal operation of the gasification device is directly influenced by the operation, performance and service life of the coal slurry due to the special properties of the coal slurry.
The water outlet section form that present coal slurry pump is commonly used is mostly single volute structure and two volute structures. The coal water pump only provided with the single volute water outlet section structure has the advantages that the water outlet section is low in manufacturing cost, the flow channel is easy to cast and process, and the water coal pump has the defects that when the pump operates at a point deviated from a designed working condition point, additional radial force acting on the impeller can be generated in the flow channel of the water outlet section, and the stability and the service life of the operation of the pump can be influenced. The coal water pump with the water outlet section of the double-volute structure can balance radial force, but the water outlet section of the double-volute structure is a double-layer flow channel, so that the water outlet section of the double-volute structure is difficult to cast and difficult to sand clean in an outer side flow channel, and the outer side flow channel is blocked to influence the performance of the pump. The water-coal-slurry at the outlet of the impeller does work through the impeller, the kinetic energy is high, the flow speed is high, the water-coal-slurry directly enters the water outlet section, the high-speed water-coal-slurry has strong erosion and abrasiveness on the water outlet section of the single volute or the water outlet section of the double volute, the water outlet section is a quick-wear part, and the outlet pipeline needs to be removed when the water outlet section is replaced, so that time and labor are wasted.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of providing a guide vane type low pressure water coal slurry pump, which adopts a structure that a guide vane and a single volute water outlet section are combined, can automatically balance the radial force generated when operating at an non-operating point, and ensures the stable operation of the pump; the guide vane can reduce the flow velocity of the coal water slurry and convert the kinetic energy of the coal water slurry into pressure energy; the flow rate of the coal water slurry flowing out of the guide vane and entering the water outlet section is greatly reduced, so that the erosion and abrasion of the coal water slurry to the water outlet section are reduced, the service life of the water outlet section is prolonged, the replacement frequency of the water outlet section is reduced, and the maintenance cost and the maintenance efficiency are reduced; the surfaces of the guide vanes and the flow channel of the water outlet section of the single volute are easy to clean and polish, so that the performance of the pump is ensured, and the efficiency of the pump is improved.
In order to solve the problem, the utility model provides a stator formula low pressure water coal stuff pump, for vertical single-stage single suction cantilever type centrifugal pump, including the pump seat, the cover body, with cover body coupling's inlet elbow and inlet nozzle stub, play water section the play water section inboard is equipped with the stator, and the impeller setting is in the stator is inboard, the impeller passes through the pump shaft, impeller upper portion is equipped with the block and seals the impeller, and block and seal impeller upper portion and be equipped with the axle sleeve, it is equipped with the outlet nozzle stub outward to go out the water section, it is equipped with the pump cover and upper portion and blocks and seal the stator to go out water section lower part, it is equipped with the intermediate strut to block and seal stator upper portion, and collection dress formula mechanical seal subassembly is fixed on the intermediate strut and with the axle sleeve overlap joint, intermediate strut upper portion is equipped with the bearing part, the bearing part is equipped with in the bearing part, the bearing part is adorned on the pump shaft to it is fixed with round nut locking, impeller and block and seal the impeller dress on the pump shaft bearing part upper portion is equipped with motor support, motor support upper portion is equipped with the motor shaft coupling, motor passes through the subassembly and couples.
Furthermore, it is single spiral case structure to go out the water section, and its inboard is equipped with the stator and is used for balancing stator formula low pressure water coal slurry pump goes out the additional radial force of water section to the impeller.
Furthermore, the impeller is a composite impeller, the main blades are long blades and short blades which are uniformly distributed at intervals, and the front cover plate and the rear cover plate of the impeller are both provided with auxiliary blades so as to prevent the coal water slurry at the outlet of the impeller from leaking to the inlet of the impeller and a sealing cavity connected with the impeller.
Further, the number of main blades of the impeller and the number of guide blades of the guide vane are relatively prime.
Further, the guide vane type low-pressure coal water slurry pump is characterized in that a gap between the impeller and the blocking guide vane is 1.5-2 mm; the clearance between the impeller and the pump cover is 1.5 mm-2 mm.
Furthermore, the integrated mechanical seal assembly is fixed on the middle support, the lower part of the integrated mechanical seal assembly is lapped on the shaft sleeve, the integrated mechanical seal assembly and the shaft sleeve are sealed by an O-shaped ring, and the shaft sleeve of the integrated mechanical seal assembly is fixed on the pump shaft by a set screw.
Furthermore, the water inlet short pipe is connected with the water inlet bent pipe, and the caliber of the flange of the water inlet short pipe at the connected end is larger than or equal to that of the flange of the water inlet bent pipe.
Furthermore, the water outlet short pipe is connected with the water outlet section, and the size of the flange at the joint end of the water inlet short pipe and the pipeline is matched with that of the pipeline flange.
The beneficial effects of the utility model are that:
(1) The structure that the guide vane and the single volute water outlet section are combined is adopted, so that the radial force generated when the water-coal-slurry pump operates at a non-operating point can be automatically balanced, and the operation of the water-coal-slurry pump is more stable.
(2) The guide vane can reduce the flow velocity of the coal water slurry and convert the kinetic energy of the coal water slurry into pressure energy; the flow rate of the coal water slurry flowing out of the guide vane and entering the water outlet section is greatly reduced, so that the erosion and abrasion of the coal water slurry to the water outlet section are reduced, the service life of the water outlet section is prolonged, the replacement frequency of the water outlet section is reduced, and the maintenance cost and the maintenance efficiency are reduced.
(3) The surfaces of the flow passages of the guide vanes and the single volute water outlet section are easy to clean and polish, so that the performance of the pump can be ensured, and the efficiency of the pump can be improved.
(4) The impeller adopts the conforming impeller, and the main blades of the impeller adopt the long blades and the short blades which are alternately arranged at intervals to form the composite blades, so that the inlet area of the impeller can be increased, the suction performance of the pump is improved, the hydraulic loss of the inlet of the pump is reduced, and the siltation of the water-coal-slurry at the inlet of the pump is prevented. Meanwhile, the number of main blades at the outlet side of the impeller is increased, so that the influence of outlet flow separation and backflow phenomena on the performance of the pump can be reduced or prevented, the hydraulic loss of the pump is reduced, and the scouring abrasion of the pump is reduced; the efficiency is improved, and energy conservation is realized.
(5) When a user requires to change the caliber, the pressure grade and the flange standard of the inlet flange and the outlet flange, only the water inlet short pipe and the water outlet short pipe are required to be changed, and the universality of the water outlet section and the water inlet bent pipe is improved.
Drawings
FIG. 1 is a schematic view showing the structure of a vane-type low-pressure water-coal-slurry pump according to the present invention;
fig. 2 is a schematic layout of the water outlet section, the guide vanes and the impeller.
Reference numerals:
1. a pump mount; 2. A water inlet bent pipe;
3. a sleeve body; 4. A pump cover;
5. a water outlet section; 6. A short water outlet pipe;
7. a guide vane; 8. Blocking guide vanes;
9. a blocking baffle; 10. A middle support;
11. a bearing member; 12. A motor bracket;
13. a coupling assembly; 14. An electric motor;
15. a round nut; 16. A bearing;
17. a shaft; 18. A cartridge-type mechanical seal assembly;
19. a shaft sleeve; 20. Blocking the impeller;
21. an impeller; 22. A stud;
23. a short water inlet pipe.
Detailed Description
The following will explain in detail the specific embodiments of the vane type low pressure water coal slurry pump provided by the present invention with reference to the drawings.
Fig. 1 shows a schematic structural view of a guide vane type low-pressure water-coal-slurry pump of the present invention. The utility model discloses in, centrifugal coal-water slurry pump is vertical single-stage single suction cantilever type centrifugal pump. Referring to fig. 1, the centrifugal water-coal-slurry pump includes a pump base 1, a cover 3, a water inlet elbow 2, a water inlet short pipe 23 and a water outlet section 5, the water outlet section 5 is provided with a guide vane 7 at the inner side, an impeller 21 is arranged at the inner side of the guide vane 7, the impeller 21 passes through a pump shaft 17, the impeller 21 is provided with a blocking impeller 20 at the upper part, a shaft sleeve 19 is arranged at the upper part of the impeller 20, the water outlet section 5 is provided with a water outlet short pipe 6 at the outer side, the lower part of the water outlet section 5 is provided with a pump cover 4 and the upper part is provided with a blocking guide vane 8, the upper part of the blocking guide vane 8 is provided with a middle support 10, a container type mechanical seal assembly 18 is fixed on the middle support 10 and is overlapped with the shaft sleeve 19, the middle support 10 is provided with a bearing assembly 10, the bearing 15 is arranged in the bearing assembly 10, the bearing 15 is arranged on the pump shaft 17 and is locked and fixed by a round nut 15, the impeller 21 and the blocking impeller 20 are arranged on the pump shaft 17, the bearing assembly 10 is provided with a motor support 12, the motor 14 at the upper part of the motor support 12, and the motor 14 is connected with the pump shaft 17 by a coupling assembly 13.
The water outlet section 5 is of a single volute structure, and guide vanes 7 are arranged on the inner side of the water outlet section and used for balancing the additional radial force of the guide vane type low-pressure coal water slurry pump water outlet section 5 on the impeller 21. The guide vane 7 can reduce the flow rate of the coal water slurry and convert the kinetic energy of the coal water slurry into pressure energy; greatly reduces the erosion and abrasion of the water outlet section 5 caused by the coal water slurry, and greatly prolongs the service life of the water outlet section 5.
The impeller 21 is a composite impeller, the main blades are long and short blades which are uniformly distributed at intervals, and the front cover plate and the rear cover plate of the impeller are both provided with auxiliary blades so as to prevent coal water slurry at the outlet of the impeller from leaking to the inlet of the impeller and a sealing cavity connected with the impeller.
The number of main blades of the impeller 5 and the number of guide blades of the guide vane 7 are relatively prime to prevent periodic vibration.
The clearance between the impeller 21 and the blocking guide vane 8 is 1.5 mm-2 mm; the clearance between the impeller 21 and the pump cover 4 is 1.5 mm-2 mm, the clearance can prevent mutual friction, and meanwhile, the back blades on the impeller 21 can effectively prevent the coal water slurry from leaking to low pressure.
The integrated mechanical seal assembly 18 is fixed on the middle bracket 10, the lower part of the integrated mechanical seal assembly is lapped on the shaft sleeve 19, an O-shaped ring is used for sealing between the integrated mechanical seal assembly 18 and the shaft sleeve 19, and the shaft sleeve of the integrated mechanical seal assembly 18 is fixed on the pump shaft 17 by a set screw; by the structure, the axial positioning of the integrated mechanical seal assembly 18 is not influenced by size accumulated errors, the normal operation of the integrated mechanical seal assembly 18 is ensured, and the service life is prolonged.
The water inlet short pipe 23 is connected with the water inlet bent pipe 2, the size of the flange of the connection end of the water inlet short pipe 23 and the pipeline is consistent with that of the pipeline flange, the caliber of the flange is generally larger than or equal to that of the flange of the connection end of the water inlet bent pipe 2, and when the calibers of the two ends are different, the eccentric short pipe is adopted and the lower part of the flange is flush when the flange is installed. Be equipped with into water nozzle stub 23, can improve into the commonality of water return bend 2, can satisfy the different import pipe diameter connection requirements of user simultaneously.
The water outlet short pipe 6 is connected with the water outlet section 5, the size of the flange of the connecting end of the water outlet short pipe 6 and the pipeline is consistent with that of the pipeline flange, and when the calibers of the two ends are different, the concentric short pipes are adopted. The short water outlet pipe 6 is arranged, so that the universality of the water outlet section 5 can be improved, and the connection requirements of different outlet pipe diameters of users can be met.
The utility model discloses in, the part that overflows includes into water return bend 2, pump cover 4, play water section 5, stator 7, hinders to seal the stator, hinders to seal baffle 9, impeller 21, hinders to seal impeller 20, axle sleeve 19, into water return bend 23, play water nozzle stub 6 and overflows parts etc. and make by high abrasion resistant material.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (9)
1. The guide vane type low-pressure water coal slurry pump is a vertical single-stage single-suction cantilever type centrifugal pump and is characterized by comprising a pump base, a sleeve body, a water inlet bent pipe, a water inlet short pipe and a water outlet section, wherein the water inlet bent pipe, the water inlet short pipe and the water outlet section are connected with the sleeve body, guide vanes are arranged on the inner side of the water outlet section, impellers are arranged on the inner side of the guide vanes, the impellers pass through a pump shaft, a blocking impeller is arranged on the upper portion of each impeller, a shaft sleeve is arranged on the upper portion of the blocking impeller, a water outlet short pipe is arranged outside the water outlet section, a pump cover is arranged on the lower portion of the water outlet section, the blocking guide vanes are arranged on the upper portion of the blocking guide vanes, a container type mechanical sealing assembly is fixed on the middle support and is in lap joint with the shaft sleeve, a bearing component is arranged on the upper portion of the middle support, a bearing is installed on the pump shaft and is locked and fixed by a round nut, a motor support is arranged on the upper portion of the bearing component, and the motor support is connected with the pump shaft through a coupling assembly.
2. The slurry pump according to claim 1, wherein the water outlet section is of a single volute structure, and a guide vane is arranged on the inner side of the water outlet section to balance the additional radial force of the water outlet section of the slurry pump on the impeller.
3. The guide vane type low-pressure water coal slurry pump according to claim 1, wherein the impeller is a composite impeller, the main blades are long and short blades which are uniformly distributed at intervals, and the front cover plate and the rear cover plate of the impeller are both provided with auxiliary blades so as to prevent the water coal slurry at the outlet of the impeller from leaking to the inlet of the impeller and a sealing cavity connected with the impeller.
4. The slurry pump according to claim 3, wherein the number of main vanes of the impeller is relatively prime to the number of guide vanes of the guide vane.
5. The slurry pump according to claim 1, wherein the clearance between the impeller and the blocking guide vane is 1.5mm to 2mm; the clearance between the impeller and the pump cover is 1.5 mm-2 mm.
6. The slurry pump according to claim 3, wherein the auxiliary vane is fixed to the pump shaft above the impeller to balance the axial force of the pump.
7. The slurry pump according to any of claims 1 to 6, wherein the integrated mechanical seal assembly is fixed on the middle support, the lower part of the integrated mechanical seal assembly is lapped on the shaft sleeve, an O-shaped ring is used for sealing between the mechanical seal and the shaft sleeve, and the shaft sleeve of the integrated mechanical seal assembly is fixed on the pump shaft by a set screw.
8. The slurry pump according to claim 7, wherein the inlet stub is connected to the inlet elbow, and the flange diameter of the inlet stub at the end of the connection is greater than or equal to the flange diameter of the inlet elbow.
9. The slurry pump according to claim 7, wherein the outlet pipe is connected to the outlet section, and the flange of the connecting end of the inlet pipe and the pipeline is matched with the flange of the pipeline in size.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221471768.3U CN217682296U (en) | 2022-06-14 | 2022-06-14 | Guide vane type low-pressure water coal slurry pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221471768.3U CN217682296U (en) | 2022-06-14 | 2022-06-14 | Guide vane type low-pressure water coal slurry pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217682296U true CN217682296U (en) | 2022-10-28 |
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ID=83709522
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221471768.3U Active CN217682296U (en) | 2022-06-14 | 2022-06-14 | Guide vane type low-pressure water coal slurry pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217682296U (en) |
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2022
- 2022-06-14 CN CN202221471768.3U patent/CN217682296U/en active Active
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