CN213392701U - High-temperature high-pressure wear-resistant centrifugal pump - Google Patents
High-temperature high-pressure wear-resistant centrifugal pump Download PDFInfo
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- CN213392701U CN213392701U CN202022058960.7U CN202022058960U CN213392701U CN 213392701 U CN213392701 U CN 213392701U CN 202022058960 U CN202022058960 U CN 202022058960U CN 213392701 U CN213392701 U CN 213392701U
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Abstract
The utility model discloses a high-temperature high-pressure wear-resistant centrifugal pump, which comprises an impeller, a pump body and a suspension component, wherein a pump shaft is connected in the suspension component, the front end of the suspension component is connected with a sealing head through a screw, and the pump shaft is provided with the impeller; the front of the impeller is provided with a front lining plate, and the back of the impeller is provided with a back lining plate; the rear lining plate flange is clamped in a groove formed by the seal head and the pump body positioning spigot, and metal winding gaskets are arranged at the joint of the two sides of the rear lining plate flange and the seal head and the pump body; a pump cover is arranged on the front side of the pump body, and an inlet bushing is arranged in the pump cover; the front lining plate flange is clamped in a groove formed by the pump cover and the pump body positioning spigot, and metal wound gaskets are arranged at the joint of the two sides of the front lining plate flange and the pump cover and the pump body. The utility model has the advantages of simple and reasonable structure, it is convenient to dismantle the maintenance, the stable performance, and safe and reliable has improved wear resistance, has prolonged life, is applicable to and carries high lift under the high temperature high pressure environment and contains solid medium.
Description
Technical Field
The utility model relates to a centrifugal pump technical field especially relates to a high temperature high pressure wear-resisting pump.
Background
In the coal gasification key process in the coal chemical industry, a key pump for conveying high-temperature and high-pressure black water and grey water containing solid particles is needed to realize the functions of chilled water pressurization, black water circulation and the like, the pressure bearing of the pump can reach 12Mpa at the medium temperature of 300 ℃ at the maximum, the lift of the pump can reach 200 m at the maximum, and the medium contains 10% of solid particles such as coal ash and coal cinder, so the pump also has certain wear resistance, the centrifugal pump generally used for conveying clean liquid can not meet the wear resistance requirement, and the single-stage centrifugal slurry pump generally used for conveying solid-containing medium can not meet the requirements of high temperature and high lift. The centrifugal pump in the prior art can not meet the requirements of the working conditions simultaneously, or can meet the requirements of the working conditions simultaneously, but has the defects of unsatisfactory service life, poor reliability, inconvenience in installation and maintenance and the like, so that a product which has comprehensive performance better meeting the requirements and is safer and more reliable and convenient to maintain needs to be developed aiming at the working conditions.
Disclosure of Invention
The purpose of the utility model is to solve the technical problem and provide a high-temperature high-pressure wear-resistant centrifugal pump.
In order to realize the technical purpose, reach foretell technical requirement, the utility model discloses the technical scheme who adopts is:
the utility model provides a wear-resisting centrifugal pump of high temperature high pressure, includes impeller, the pump body, suspension part, its characterized in that: the suspension component is internally connected with a pump shaft, the front end of the suspension component is connected with an end enclosure through a screw, the joints of the end enclosure and the suspension component are provided with O-shaped sealing rings, the front end of the pump shaft is provided with a mechanical seal close to the suspension component, and the pump shaft at the front end of the mechanical seal is provided with an impeller; the impeller is arranged in the pump body, a front lining plate is arranged in front of the impeller, and a rear lining plate is arranged behind the impeller; the rear lining plate flange is clamped in a groove formed by the seal head and the pump body positioning spigot, the seal head and the pump body are fastened through a stud, a nut and a washer, and metal wound gaskets are arranged at the joint of the two sides of the rear lining plate flange and the seal head and the pump body; a pump cover is arranged on the front side of the pump body, and an inlet bushing is arranged in the pump cover; the pump cover is fastened with the pump body through a stud, a nut and a gasket, and metal wound gaskets are arranged at the joint of the two sides of the front lining plate flange and the pump cover and the pump body.
Preferably: and a gap is formed at the joint of the pump cover and the pump body.
Preferably: and a gap is arranged at the joint of the seal head and the pump body.
Preferably: the pump body is characterized in that a gap of 0.5mm is arranged at the joint of the outer circle of the front lining plate flange and the outer circle of the rear lining plate flange and the pump body, and a gap of 0.05-0.15 is arranged at the joint of the front lining plate, the outer circle of the rear lining plate and the positioning spigot of the pump body.
Preferably: a baffling labyrinth A is arranged at the joint of the pump cover and the front lining plate, which is far away from the flange; a baffling labyrinth B is arranged at the joint of the seal head and the rear lining plate, which is far away from the flange; a pressure balance cavity A is arranged at the joint of the pump cover and the front lining plate, which is close to the flange; and a pressure balance cavity B is arranged at the joint of the seal head and the rear lining plate, which is close to the flange.
Preferably: the impeller adopts a closed impeller structure.
Preferably: the pump body adopts a central line installation form, and the pump body pumping water chamber adopts a double-vortex chamber spiral side outlet form.
Compared with the traditional structure, the beneficial effects of the utility model are that: simple structure is reasonable, dismantles and maintains the convenience, and the stable performance, safe and reliable has improved wear resistance, has prolonged life, is applicable to and carries high-lift under the high temperature high pressure environment and contains solid medium.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view of the front and rear liners of FIG. 1;
FIG. 3 is a view illustrating a pressure balance manner of front and rear liners in FIG. 1;
FIG. 4 is an enlarged view of the baffle labyrinth of FIG. 3;
FIG. 5 is a schematic view of the structure of the pump body of the present invention;
FIG. 6 is a schematic view of a mounting and fixing structure of front and rear liners in the prior art;
in the figure: 1. the pump comprises a pump cover, 2 parts of an inlet bushing, 3 parts of a double-end stud, 6 parts of a metal wound gasket, 7 parts of a front lining plate, 8 parts of an impeller, 9 parts of a pump body, 10 parts of a rear lining plate, 11 parts of a sealing head, 12 parts of an O-shaped sealing ring, 14 parts of a mechanical seal, 15 parts of a suspension component, 16 parts of a pump shaft, 17 parts of a throttling bushing, 18 parts of a liquid discharge pipeline, 19 parts of a pressure balance cavity A, 20 parts of a pressure balance cavity B, 21 parts of a deflection labyrinth A, 22 parts of a deflection labyrinth B and 23 screws.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
With reference to the accompanying drawings: the utility model discloses well impeller is closed blade impeller, and the lift of wear-resisting centrifugal pump is inhaled to general sediment thick liquid formula single-stage list, and the highest lift can reach 200 meters for satisfying coal chemical industry gasification key pump to the high-lift requirement of single-stage wear-resisting centrifugal pump, through modes such as the hydraulic design of innovation, the impeller diameter that increases, high rotational speed (2900 rpm). The impeller is made of high-hardness wear-resistant alloy materials so as to meet the wear-resistant requirement under the high-speed rotation working condition, the front cover plate and the rear cover plate of the impeller are not provided with back blades, particularly, under the condition of high inlet pressure, the back blades and the throttling hole ring structures which are common in common centrifugal pumps are removed by the rear cover plate, the function of balancing partial axial force is achieved, and the residual axial force is borne by a bearing.
The pump body is a main pressure-bearing part, the pressurized-water chamber of the pump adopts a double-vortex chamber spiral side outlet design, and compared with a guide vane mode adopted under the same working condition, the utility model has the advantages that the permitted maximum particle diameter is larger, and the wear resistance is better; the use of twin scroll chambers has the advantage of reducing radial forces compared to single scroll chambers.
The utility model is provided with a front lining plate and a rear lining plate, wherein the front lining plate is fastened by a pump cover and a pump body through a double-end stud, a nut and a gasket, and the front lining plate is fixed in a double-butt clamp mode; the rear lining plate is fastened by the seal head and the pump body through a double-end stud, a nut and a washer, and the rear lining plate is fixed in a double-butt clamp mode. And wear-resisting welt passes through the bolt fastening around the current structure, even if not need the bolt fastening, also needs bolt and boss structure to prevent that the welt from rotatory, and this structure is complicated, and the assembly difficulty can cause the bolt wearing and tearing after the use, leads to the welt not to demolish, maintains the difficulty. This the utility model discloses succinct structure more, preceding welt passes through the pump cover and the pump body presss from both sides tight mode is fixed, and the back welt passes through head and the pump body presss from both sides tightly fixedly, need not through need the bolt fastening with prevent changeing can guarantee around the welt firm location to it is more convenient to make the installation maintain.
The front lining plate and the rear lining plate are made of high-hardness wear-resistant alloy, the hardness is high, the front lining plate and the pump cover are particularly communicated through the deflection labyrinth, the pressure inside the pump cavity is transmitted to the space between the front lining plate and the pump cover, the pressure on the inner side and the outer side of the front lining plate is balanced, and the deflection labyrinth is used for preventing the slurry between the front lining plate of the pump body and the pump cover from rotating. Similarly, the back lining plate is communicated with the end enclosure through a baffling labyrinth, so that the pressure in the pump cavity is transmitted between the back lining plate and the end enclosure, and the pressure on the inner side and the outer side of the back lining plate is balanced. The baffling labyrinth has the function of effectively preventing slurry between the front lining plate of the pump body and the pump cover from rotating under the driving of the rotor to generate abrasion and energy consumption while communicating, so that the pump cover, the seal head and the pump body bear the action of a pressure pump shell, and the front lining plate and the rear lining plate mainly play a role in abrasion resistance.
The front lining plate, the rear lining plate and the pump body positioning spigot are in clearance fit, the clearance is controlled to be 0.05-0.15 mm through calculation and experimental verification, the matching surfaces in the other circumferential directions are designed to be clearances not smaller than 0.5mm, and the pump body positioning spigot is aimed at reserving a part deformation space at high temperature and high pressure and preventing the part from being broken due to excessive internal stress.
The pressure pump shell is sealed by adopting a metal winding gasket, the sealing point of the existing structure is between the pump cover and the pump body and between the pump body and the seal head, the metal winding gasket is clamped between the two parts after being extruded and deformed, and great friction resistance is generated, so that the pump cover and the seal head are difficult to disassemble. The utility model discloses with the sealed rebound of the pump cover and the pump body to the split is sealed for the pump body and the end face seal of preceding welt and the end face seal twice of pump cover and preceding welt, and the risk is leaked in the dispersion. Similarly, the seal between the pump body and the seal head is moved inwards and is split into two seals, and the same effect is achieved. The groove for placing the metal winding gasket for sealing is formed in one part, so that friction resistance cannot be generated when the pump cover and the front lining plate are detached, the pump cover and the front lining plate can be pulled out easily, and friction resistance cannot be generated when the pump body and the seal head are detached, so that the pump body and the seal head are detached easily.
The above embodiments of the present invention are only examples for clearly illustrating the present invention, but not for limiting the scope of the present invention, and all equivalent technical solutions also belong to the scope of the present invention, and the scope of the present invention should be defined by the claims.
Claims (7)
1. The utility model provides a wear-resisting centrifugal pump of high temperature high pressure, includes impeller (8), pump body (9), suspension part (15), its characterized in that: a pump shaft (16) is connected in the suspension component (15), the front end of the suspension component (15) is connected with an end enclosure (11) through a screw, O-shaped sealing rings (12) are arranged at the joints of the end enclosure (11) and the suspension component (15),
a mechanical seal (14) is arranged at the position, close to the suspension component (15), of the front end of the pump shaft (16), and an impeller (8) is arranged on the pump shaft (16) at the front end of the mechanical seal (14); the impeller (8) is arranged in the pump body (9), a front lining plate (7) is arranged in front of the impeller (8), and a rear lining plate (10) is arranged behind the impeller (8); the flange of the rear lining plate (10) is clamped in a groove formed by a seal head (11) and a positioning spigot of the pump body (9), the seal head (11) and the pump body (9) are fastened through a stud (3), a nut and a gasket, and metal winding gaskets (6) are arranged at the joint of the two sides of the flange of the rear lining plate (10) with the seal head (11) and the pump body (9); a pump cover (1) is arranged on the front side of the pump body (9), and an inlet bushing (2) is arranged in the pump cover (1); preceding welt (7) flange card is established in the recess that pump cover (1) and pump body (9) location tang are constituteed, pump cover (1) and pump body (9) are through stud (3), nut, packing ring fastening, preceding welt (7) flange both sides and pump cover (1) and pump body (9) department of meeting all are provided with metal winding gasket (6).
2. A high temperature, high pressure, wear resistant centrifugal pump according to claim 1, wherein: a gap is arranged at the joint of the pump cover (1) and the pump body (9).
3. A high temperature, high pressure, wear resistant centrifugal pump according to claim 1, wherein: and a gap is arranged at the joint of the seal head (11) and the pump body (9).
4. A high temperature, high pressure, wear resistant centrifugal pump according to claim 1, wherein: the joint of the flange excircle of the front lining plate (7) and the flange excircle of the rear lining plate (10) with the pump body (9) is provided with a gap of 0.5mm, and the joint of the flange excircle of the front lining plate (7) and the flange excircle of the rear lining plate (10) with the positioning spigot of the pump body (9) is provided with a gap of 0.05-0.15 mm.
5. A high temperature, high pressure, wear resistant centrifugal pump according to claim 1, wherein: a baffling labyrinth A (21) is arranged at the joint of the pump cover (1) and the front lining plate (7) far away from the flange; a baffling labyrinth B (22) is arranged at the joint of the seal head (11) and the rear lining plate (10) far away from the flange; a pressure balance cavity A (19) is arranged at the joint of the pump cover (1) and the front lining plate (7) close to the flange; and a pressure balance cavity B (20) is arranged at the joint of the seal head (11) and the rear lining plate (10) close to the flange.
6. A high temperature, high pressure, wear resistant centrifugal pump according to claim 1, wherein: the impeller (8) adopts a closed impeller structure.
7. A high temperature, high pressure, wear resistant centrifugal pump according to claim 1, wherein: the pump body (9) adopts a central line installation form, and the pump body pumping water chamber adopts a double-vortex chamber spiral side outlet form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022058960.7U CN213392701U (en) | 2020-09-19 | 2020-09-19 | High-temperature high-pressure wear-resistant centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022058960.7U CN213392701U (en) | 2020-09-19 | 2020-09-19 | High-temperature high-pressure wear-resistant centrifugal pump |
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| Publication Number | Publication Date |
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| CN213392701U true CN213392701U (en) | 2021-06-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022058960.7U Active CN213392701U (en) | 2020-09-19 | 2020-09-19 | High-temperature high-pressure wear-resistant centrifugal pump |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113803264A (en) * | 2021-10-12 | 2021-12-17 | 怀化辰州机械有限责任公司 | Integrated full-automatic ore pulp reversing conveying method |
-
2020
- 2020-09-19 CN CN202022058960.7U patent/CN213392701U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113803264A (en) * | 2021-10-12 | 2021-12-17 | 怀化辰州机械有限责任公司 | Integrated full-automatic ore pulp reversing conveying method |
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