CN219452422U - High-efficiency quenching water circulating pump for large ethylene device - Google Patents

Abstract

The utility model discloses a high-efficiency quenching water circulating pump for a large-scale ethylene device, relates to the technical field of circulating pumps, and particularly relates to a high-efficiency quenching water circulating pump for a large-scale ethylene device. The pump body is made in an integral casting mode, comprises a suction chamber and an extrusion chamber, and has a pump body structure integrating suction and discharge functions; a double sealing structure is arranged between the pump body and the pump cover; the pump body adopts a double suction wheel structure, so that axial force caused by asymmetry of the structure can be effectively balanced, and a throat bush is arranged on the pump body; a pump cover mouth ring and an impeller mouth ring are arranged between the impeller and the pump cover; the impeller is axially fixed by adopting a snap ring sleeve assembly. The technical scheme of the utility model has the advantages of simple structure, safety, reliability and high efficiency, and can meet various requirements of the high-efficiency quenching water circulating pump for the large ethylene device.

Description

High-efficiency quenching water circulating pump for large ethylene device

Technical Field

The utility model discloses a high-efficiency quenching water circulating pump for a large-scale ethylene device, relates to the technical field of circulating pumps, and particularly relates to a high-efficiency quenching water circulating pump for a large-scale ethylene device.

Background

The quench water circulation pump is one of the important devices in the ethylene plant, and the reliability of the operation of the quench water circulation pump severely affects the effective operation of the ethylene plant. Foreign ethylene technology has been developed earlier and has been in the leading position for a long time, and the technology has been developed to date. But China does not have the manufacturing performance of a quenching water pump for a 100 ten thousand ton/year ethylene device. At present, import equipment is always adopted for a quenching water pump unit in a million tons ethylene device in China. In the development process, the demands of the countries for important equipment are increasing, and the equipment cannot be completely dependent on import, and foreign countries cannot be completely provided for China. Therefore, the localization of the quenching water pump for the ethylene device not only can reduce project investment, but also has important significance for improving the domestic factory level and the national industry.

The quenching water circulating pump has a certain content of hard solid particles in a process medium in partial engineering application, namely a wearing working condition exists, the running efficiency of equipment can be reduced along with the increase of the operation time, and however, the inlet equipment does not take effective measures in the aspect of efficiency improvement.

Aiming at the problems in the prior art, the research and design of a novel high-efficiency quenching water circulating pump for a large-scale ethylene device is necessary to overcome the problems in the prior art.

Disclosure of Invention

According to the technical problems of the prior art, the efficient quenching water circulating pump for the large-sized ethylene device has the advantages of simple structure, safety, reliability and high efficiency.

The utility model adopts the following technical means:

a high efficiency quench water circulation pump for a large ethylene plant comprising: the pump comprises a pump body, a pump cover, an impeller, a shaft, a sealing component and a bearing component; the impeller is arranged on the shaft, and the pump body is sleeved outside the impeller; two ends of the pump body are respectively provided with a pump cover; the outer parts of the two pump covers are symmetrically provided with a sealing part and a bearing part; the shaft is connected with the motor through a coupler;

further, the pump body is made in an integral casting mode and comprises a suction chamber and an extrusion chamber, and the pump body structure integrates suction and discharge functions;

further, a double sealing structure is arranged between the pump body and the pump cover;

further, the pump body adopts a double suction wheel structure, so that axial force caused by asymmetry of the structure can be effectively balanced, and the throat bush is arranged on the pump body;

further, a pump cover mouth ring and an impeller mouth ring are arranged between the impeller and the pump cover;

further, the impeller is axially fixed by a snap ring sleeve assembly.

Further, the suction chamber has a spiral structure.

Further, the extrusion chamber is of a double-volute structure.

Further, the throat bush is designed into a labyrinth structure, a plurality of throttling gaps are arranged between the shaft and the throat bush, the fluid pressure head is lowered and fluid leakage is reduced through a plurality of throttling, mechanical sealing components in the sealing cavity are protected, leakage loss is reduced, and the efficiency of the pump is improved.

Further, the pump cover mouth ring and the impeller mouth ring are hardened to improve the wear resistance of the friction pair and protect the impeller from being damaged;

further, the labyrinth structure is arranged on the impeller mouth ring, a plurality of throttling gaps are formed between the pump cover mouth ring and the impeller mouth ring, and the pressure head is reduced to reduce the leakage of fluid through repeated throttling, so that the efficiency of the pump is improved.

Further, the double seal structure includes: an inboard static seal and an outboard static seal;

further, the inner static seal is arranged at the joint of the pump body and the inside of the pump cover to isolate the suction chamber from the extrusion chamber, so that fluid leakage from the high pressure side to the low pressure side is effectively blocked, the operation stability of the pump is improved, and meanwhile, the efficiency of the pump is improved;

further, the outside static seal is arranged at the joint of the pump body and the outside of the pump cover, so that the tightness of the bearing boundary is realized, and the stable operation of the pump is ensured.

Further, the clamping ring sleeve component is in a combined form of a half clamping ring and a clamping ring sleeve; the axial positioning of the impeller is carried out through the combined form, the structure is simple, the axial matching size is short, and the axial positioning device has the characteristics of convenient installation and disassembly.

Furthermore, the bearing parts are supported at two ends, radial sliding bearings are adopted to bear radial force, and the radial sliding bearings have good radial bearing capacity and support stability, so that the reliability and stability of unit operation are improved.

Compared with the prior art, the utility model has the following advantages:

1. the pump body of the high-efficiency quenching water circulating pump for the large ethylene device adopts a double-suction wheel structure, so that axial force caused by asymmetry of the structure can be effectively balanced;

2. the utility model provides a high-efficiency quenching water circulating pump for a large ethylene device, wherein a throat bush is designed into a labyrinth structure, a plurality of throttling gaps are arranged between a shaft and the throat bush, a fluid pressure head is lowered and fluid leakage is reduced through multiple throttling, a mechanical sealing part in a sealing cavity is protected, leakage loss is reduced, and the efficiency of the pump is improved

3. The utility model provides a high-efficiency quenching water circulating pump for a large ethylene device, wherein a labyrinth structure is arranged on an impeller mouth ring, a plurality of throttling gaps are formed between a pump cover mouth ring and the impeller mouth ring, and the pressure head is reduced through multiple throttling so as to reduce the leakage of fluid, and the efficiency of the pump is improved

4. The high-efficiency quenching water circulating pump for the large ethylene device provided by the utility model has the advantages that the double-sealing structure effectively blocks the fluid leakage from the high pressure side to the low pressure side, the operation stability of the pump is improved, and the efficiency of the pump is also improved

5. The high-efficiency quenching water circulating pump for the large ethylene device provided by the utility model has the advantages that the clamping ring sleeve assembly adopts the combination mode of the split clamping ring and the clamping ring sleeve to axially position the impeller, the structure is simple, the axial matching size is short, and the installation and the disassembly are convenient

6. According to the high-efficiency quenching water circulating pump for the large ethylene device, the bearing components are supported at two ends, radial sliding bearings are adopted to bear radial force, and have good radial bearing capacity and supporting stability, so that the reliability and stability of unit operation are improved.

In conclusion, the technical scheme of the utility model has the advantages of simple structure, safety, reliability and high efficiency, and can meet various requirements of the quenching water circulating pump.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to the drawings without inventive effort to a person skilled in the art.

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic diagram of the pump body of the present utility model;

FIG. 3 is a schematic view of the throat insert of the present utility model;

FIG. 4 is a schematic view of the structure of the impeller collar of the present utility model;

FIG. 5 is a schematic view of a dual static seal structure according to the present utility model;

FIG. 6 is a schematic view of a snap ring sleeve assembly according to the present utility model.

In the figure: 1. pump body 2, pump cover 3, impeller 4, shaft 5, pump cover collar 6, impeller collar 7, throat bush 8, snap ring sleeve assembly 9, sealing member 10, bearing member 11, inside static seal 12, outside static seal 13, split snap ring 14, snap ring sleeve.

Detailed Description

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present utility model. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise. Meanwhile, it should be clear that the dimensions of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

In the description of the present utility model, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present utility model: the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present utility model.

As shown in fig. 1, the present utility model provides a high-efficiency quench water circulation pump for a large-sized ethylene plant, comprising: the pump comprises a pump body 1, a pump cover 2, an impeller 3, a shaft 4, a sealing part 9 and a bearing part 10; the impeller 3 is arranged on the shaft 4, and the pump body 1 is sleeved outside the impeller; two ends of the pump body 1 are respectively provided with a pump cover 2; the outer parts of the two pump covers 2 are symmetrically provided with a sealing part 9 and a bearing part 10; the shaft 4 is connected with the motor through a coupler; the pump body 1 is made in an integral casting mode, comprises a suction chamber and an extrusion chamber, and has a pump body structure integrating suction and discharge functions; a double sealing structure is arranged between the pump body 1 and the pump cover 2; the pump body 1 adopts a double suction wheel structure, can effectively balance axial force caused by the asymmetry of the structure, and is provided with a throat bush 7; a pump cover mouth ring 5 and an impeller mouth ring 6 are arranged between the impeller 3 and the pump cover 2; the impeller 3 is axially fixed by a snap ring sleeve assembly 8.

As shown in fig. 2, the suction chamber is of a spiral structure, the extrusion chamber is of a double-volute structure, and the structure is compact and convenient for field installation.

As shown in fig. 3, the throat bush 7 is designed into a labyrinth structure, a plurality of throttling gaps are arranged between the shaft 4 and the throat bush 7, the fluid pressure head is lowered and the fluid leakage is reduced through a plurality of throttling, the mechanical sealing components in the sealing cavity are protected from damage, and meanwhile, the leakage loss is reduced, and the efficiency of the pump is improved.

As shown in fig. 4, the pump cover ring 5 and the impeller ring 6 are hardened to improve the wear resistance of the friction pair and protect the impeller 3 from damage; the impeller ring 6 is provided with a labyrinth structure, a plurality of throttling gaps are formed between the pump cover ring 5 and the impeller ring 6, and the pressure head is reduced to reduce the leakage of fluid through repeated throttling, so that the efficiency of the pump is improved.

As shown in fig. 5, the double seal structure includes: an inboard static seal 11 and an outboard static seal 12; the inner static seal 11 is arranged at the joint of the pump body 1 and the inside of the pump cover 2, isolates the suction chamber from the extrusion chamber, effectively blocks fluid leakage from the high pressure side to the low pressure side, improves the operation stability of the pump and improves the efficiency of the pump; the outside static seal 12 is arranged at the joint of the pump body 1 and the outside of the pump cover 2, so that the tightness of the bearing boundary is realized, and the stable operation of the pump is ensured.

As shown in fig. 6, the snap ring sleeve assembly 8 is a combination of a half snap ring 13 and a snap ring sleeve 14; the axial positioning of the impeller 3 is carried out through the combined form, the structure is simple, the axial matching size is short, and the assembly and disassembly are convenient.

As shown in fig. 1, the bearing component 10 is arranged in a manner of supporting at two ends, and adopts a radial sliding bearing to bear radial force, so that the radial sliding bearing has better radial bearing capacity and supporting stability, and the reliability and stability of unit operation are improved.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims (8)

1. A high efficiency quench water circulation pump for a large ethylene plant comprising: the pump comprises a pump body (1), a pump cover (2), an impeller (3), a shaft (4), a sealing component (9) and a bearing component (10); the impeller (3) is arranged on the shaft (4), and the pump body (1) is sleeved outside the impeller; two ends of the pump body (1) are respectively provided with a pump cover (2); the outer parts of the two pump covers (2) are symmetrically provided with a sealing part (9) and a bearing part (10); the shaft (4) is connected with the motor through a coupler; the method is characterized in that:

the pump body (1) is made in an integral casting mode, comprises a suction chamber and an extrusion chamber, and is of a pump body structure integrating suction and discharge functions;

a double sealing structure is arranged between the pump body (1) and the pump cover (2);

the pump body (1) adopts a double suction wheel structure, and a throat bush (7) is arranged on the pump body;

a pump cover mouth ring (5) and an impeller mouth ring (6) are arranged between the impeller (3) and the pump cover (2);

the impeller (3) is axially fixed by adopting a snap ring sleeve assembly (8).

2. The high-efficiency quench water circulation pump for a large ethylene plant of claim 1, wherein:

the suction chamber is of a spiral structure.

3. The high-efficiency quench water circulation pump for a large ethylene plant of claim 1, wherein:

the extrusion chamber is of a double-volute structure.

4. The high-efficiency quench water circulation pump for a large ethylene plant of claim 1, wherein:

the throat bush (7) is designed into a labyrinth structure, and a plurality of throttling gaps are arranged between the shaft (4) and the throat bush (7).

5. The high-efficiency quench water circulation pump for a large ethylene plant of claim 1, wherein:

the pump cover mouth ring (5) and the impeller mouth ring (6) are subjected to hardening treatment to improve the wear resistance of the friction pair, and the impeller (3) is protected from being damaged;

the impeller ring (6) is provided with a labyrinth structure, and a plurality of throttling gaps are formed between the pump cover ring (5) and the impeller ring (6).

6. The high-efficiency quench water circulation pump for a large ethylene plant of claim 1, wherein:

the double seal structure includes: an inner static seal (11) and an outer static seal (12);

the inner static seal (11) is arranged at the joint of the pump body (1) and the inside of the pump cover (2) to isolate the suction chamber from the extrusion chamber;

the outside static seal (12) is arranged at the joint of the pump body (1) and the outside of the pump cover (2) to realize the tightness of the bearing boundary.

7. The high-efficiency quench water circulation pump for a large ethylene plant of claim 1, wherein:

the clamping ring sleeve assembly (8) is in a combined form of a half clamping ring (13) and a clamping ring sleeve (14); the axial positioning of the impeller (3) is carried out by means of this combination.

8. The high-efficiency quench water circulation pump for a large ethylene plant of claim 1, wherein:

the bearing part (10) is arranged in a manner of being supported at both ends and is subjected to radial forces by means of a radial sliding bearing.