CN213870323U - Cryogenic pump with novel heat-insulating sealing cavity - Google Patents

Abstract

The utility model discloses cryogenic pump with novel heat preservation sealed chamber relates to low temperature liquid medium delivery pump technical field, especially relates to a cryogenic liquids (liquid nitrogen, liquid argon) delivery pump that is arranged in the air separation device. The utility model discloses pump body, impeller, pump cover part, shaft coupling, motor part, seal part and axle; the top of the shaft is connected with the motor part through a coupling, and the bottom of the shaft penetrates through the pump cover part to be connected with the impeller; a sealing part is arranged between the shaft and the pump cover part; the impeller is encapsulated in the pump body through the pump cover part; the pump body, the pump cover part and the motor part are connected together through fasteners such as screws. The technical scheme of the utility model the cryogenic pump among the prior art has been solved because the operating mode condition is harsh and the sealed manufacturing degree of difficulty that causes is big, life is short, easily takes place to damage and leak and lead to the unable normal work scheduling problem of pump.

Description

Cryogenic pump with novel heat-insulating sealing cavity

Technical Field

The utility model discloses cryogenic pump with novel heat preservation sealed chamber relates to low temperature liquid medium delivery pump technical field, especially relates to a cryogenic liquids (liquid nitrogen, liquid argon) delivery pump that is arranged in the air separation device.

Background

At present, in an air separation device, a low-temperature liquid (liquid nitrogen and liquid argon) delivery pump has the defects of high sealing technical requirement, high manufacturing difficulty and short service life in the using process because the temperature of a delivered medium can reach-196 ℃ and the delivered medium is in contact with the low-temperature medium in normal working, and the pump cannot work normally due to damage and leakage.

Aiming at the problems in the prior art, a novel cryogenic pump with a novel heat-preservation sealing cavity is researched and designed, so that the problem in the prior art is very necessary to be solved.

Disclosure of Invention

The cryogenic pump provided according to the prior art has the technical problems that the difficulty of sealing and manufacturing is high, the service life is short, the pump cannot normally work due to damage and leakage and the like, which are caused by harsh working conditions, and the cryogenic pump with the novel heat-preservation sealed cavity is provided. The utility model discloses mainly utilize and set up sealed chamber and the annular intake pipe that has the fin on the pump cap part, design multislot labyrinth design simultaneously on seal assembly's sealed axle sleeve to and at the axial hollow slot hole of epaxial design, thereby realize increasing heat radiating area, strengthen heat transfer effect, and reduce the purpose of cold volume conduction.

The utility model discloses a technical means as follows:

a cryogenic pump with a novel insulated sealed chamber comprises: the pump comprises a pump body, an impeller, a pump cover part, a coupling, a motor part, a sealing part and a shaft;

furthermore, the top of the shaft is connected with the motor part through a coupling, and the bottom of the shaft penetrates through the pump cover part to be connected with the impeller;

furthermore, a sealing part is arranged between the shaft and the pump cover part;

further, the impeller is packaged in the pump body through a pump cover component;

furthermore, the pump body, the pump cover part and the motor part are connected together through fasteners such as screws.

Furthermore, the pump cover part is provided with a sealing cavity with radiating fins, so that the heat exchange area is increased, and the heat exchange effect is enhanced.

Further, an annular air inlet pipe is arranged on the pump cover component.

Furthermore, a plurality of air inlets are uniformly distributed on the air inlet pipe in an annular manner, so that the protective gas is uniformly blown and swept, the gas circulation convection at the sealing cavity is enhanced, and the heat transfer effect is improved.

Furthermore, a multi-groove labyrinth design is designed on the sealing shaft sleeve in the sealing part, and is used for reducing cold conduction.

Further, the inside of the shaft is provided with a hollow long hole along the axis direction for reducing the cold conduction.

The utility model discloses during the use:

the medium enters the pump body from the suction inlet of the pump, enters the outlet of the pump body through the impeller under the action of centrifugal force, the inside of the pump body, the impeller and the lower part of the pump cover part are filled with flowing medium, the upper part of the pump cover part and the sealing cavity are also filled with medium but do not flow, the medium in the sealing cavity at the upper part of the pump cover part is gasified by a method of heat exchange and cold conduction reduction, a gas-liquid balance state is achieved, and the temperature in the sealing cavity is controlled to be higher than minus 50 ℃.

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

1. the utility model provides a cryogenic pump with a novel heat-preservation sealing cavity, which realizes the increase of heat exchange area and the enhancement of heat exchange effect by arranging the sealing cavity with radiating fins on the pump cover part;

2. the utility model provides a cryogenic pump with novel heat preservation sealed chamber through be provided with annular intake pipe on pump cover part, and annular equipartition has a plurality of inlet ports in the intake pipe, makes the protective gas evenly sweep, strengthens sealed chamber department gas circulation convection current, increases heat transfer effect

3. The utility model provides a cryogenic pump with a novel heat-insulating sealing cavity, which is used for reducing the conduction of cold energy by designing a multi-groove labyrinth design on a sealing shaft sleeve in a sealing part;

4. the utility model provides a cryogenic pump with a novel heat-insulating sealing cavity, which is used for reducing the conduction of cold energy by arranging a hollow long hole in the shaft along the axis direction;

5. the utility model provides a cryogenic pump with novel heat preservation sealed chamber can effectively reduce conduction, the sealed chamber temperature of control of cold volume, improves sealed service environment, prolongs sealed life, reduces cost of maintenance.

To sum up, use the technical scheme of the utility model the cryogenic pump among the prior art has been solved because the operating mode condition is harsh and the sealed manufacturing degree of difficulty that causes is big, life is short, easily takes place to damage and leak and lead to the unable normal work scheduling problem of pump.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 is a schematic structural diagram of the present invention.

In the figure: 1. the pump body 2, the impeller 3, the pump cover component 3.1, the sealing cavity 3.2, the air inlet pipe 4, the coupling 5, the motor component 6, the sealing component 6.1, the sealing shaft sleeve 7, the shaft 7.1 and the hollow long hole.

Detailed Description

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

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

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 example embodiments in accordance with the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the 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. Any specific values in all examples shown and discussed herein are to be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element in question must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of the present invention: the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship 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 of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.

As shown in figure 1, the utility model provides a cryogenic pump with novel heat preservation sealed chamber includes: the pump comprises a pump body 1, an impeller 2, a pump cover part 3, a coupling 4, a motor part 5, a sealing part 6 and a shaft 7; the top of the shaft 7 is connected with the motor part 5 through the coupling 4, and the bottom of the shaft passes through the pump cover part 3 to be connected with the impeller 2; a sealing part 6 is arranged between the shaft 7 and the pump cover part 3; the impeller 2 is encapsulated in the pump body 1 through a pump cover component 3; the pump body 1, the pump cover part 3 and the motor part 5 are connected together through fasteners such as screws.

The pump cover component 3 is provided with a sealing cavity 3.1 with radiating fins for increasing the heat exchange area and enhancing the heat exchange effect.

An annular air inlet pipe 3.2 is arranged on the pump cover part 3; a plurality of air inlets are uniformly distributed on the air inlet pipe 3.2 in an annular mode, so that the protective gas is uniformly blown and swept, the gas circulation convection at the position of the sealing cavity is enhanced, and the heat transfer effect is improved.

The sealing shaft sleeve 6.1 in the sealing part 6 is designed with a multi-groove labyrinth design for reducing the cold conduction.

The inside of the shaft 7 is provided with a hollow long hole 7.1 along the axis direction for reducing cold conduction.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (6)

1. The utility model provides a cryogenic pump with novel heat preservation sealed chamber which characterized in that, cryogenic pump with novel heat preservation sealed chamber include: the pump comprises a pump body (1), an impeller (2), a pump cover component (3), a coupling (4), a motor component (5), a sealing component (6) and a shaft (7);

the top of the shaft (7) is connected with the motor part (5) through the coupling (4), and the bottom of the shaft passes through the pump cover part (3) to be connected with the impeller (2);

a sealing part (6) is arranged between the shaft (7) and the pump cover part (3);

the impeller (2) is encapsulated in the pump body (1) through a pump cover component (3);

the pump body (1), the pump cover part (3) and the motor part (5) are connected together through fasteners such as screws.

2. The cryogenic pump with the novel heat-preservation sealed cavity as claimed in claim 1, characterized in that the pump cover part (3) is provided with a sealed cavity (3.1) with cooling fins.

3. The cryogenic pump with the novel heat-preservation sealed cavity as claimed in claim 2, characterized in that the pump cover part (3) is provided with an annular air inlet pipe (3.2).

4. The cryogenic pump with the novel heat-preserving sealed cavity as claimed in claim 3, characterized in that a plurality of air inlets are uniformly distributed on the air inlet pipe (3.2) in an annular manner.

5. The cryogenic pump with the novel heat-preserving sealed cavity according to claim 1, characterized in that a multi-groove labyrinth design is designed on a sealing shaft sleeve (6.1) in the sealing part (6).

6. The cryogenic pump with the novel heat-insulating sealed cavity as claimed in claim 1, characterized in that the inside of the shaft (7) is provided with a hollow long hole (7.1) along the axial direction.

Images