Radial drainage guide vane structure of low-temperature immersed pump for LNG (Liquefied Natural Gas) ship and floating device

Abstract

The utility model discloses a radial drainage guide vane structure of a low-temperature immersed pump for an LNG (Liquefied Natural Gas) ship and a floating device, and relates to the technical field of immersed pump production and manufacturing, in particular to the radial drainage guide vane structure of the low-temperature immersed pump for the LNG ship and the floating device. The guide vane structure is sleeved on the shaft; the bearing box is assembled on the shaft, and the bearing box and the guide vane structure are packaged on the shaft and in the pump body through the flow guide shell. The shape of the guide shell is designed according to the shape of the guide vane structure; a bearing mounting position is arranged at a lower-end shaft hole of the guide shell; a bearing box is omitted, a bearing is installed in a bearing installation position on the flow guide shell, and after the bearing is installed on the shaft, the bearing is fixedly installed through a round nut. And a bearing bush is assembled between the bearing and the flow guide shell. The lower portion of the flow guide shell is further provided with a balance disc through bolts. A spacer ring is further assembled between the bearing and the round nut. According to the technical scheme, the problems that in the prior art, a pump is low in efficiency, the height of a pump body is increased, the overall appearance is large, and the installation requirement of a compact control in a bin cannot be met are solved.

Description

TECHNICAL FIELD

[0001] The utility model discloses a low temperature immersed liquid pump radial flow guide vane structure for LNG ship and floating device relates to immersed liquid pump production and manufacturing technical field, and especially relates to a low temperature immersed liquid pump radial flow guide vane structure for LNG ship and floating device. BACKGROUND

[0002] At present, low temperature conveying pump needs to be used in the conveying of low temperature medium in LNG low temperature medium transport ship and floating device, and because the medium has the characteristics of low temperature, flammable, explosive and easy vaporization, the pump equipment conveying the medium has the characteristics of reliable sealing, small medium vaporization amount and safe, stable and reliable structure. The pump is difficult to design, manufacture and test, therefore, at present, the domestic vertical low temperature ship immersed liquid pump relies on import, and there are problems of expensive product price and slow service response. The domestication of vertical low temperature ship immersed liquid pump equipment is beneficial to the cost control of LNG transportation link, the application expansion of vertical low temperature ship immersed liquid pump in propane, ethylene and other transportation ship fields and the improvement of domestic large low temperature immersed liquid pump design and manufacturing level. The liquid cargo pump for LNG ship and floating device is blank in China.

[0003] The flow guide structure of the land pump generally adopts axial guide vane, and the efficiency is relatively low, the pump height is increased, and the overall appearance is large. The radial guide vane structure of the land pump collects liquid to the outlet cavity through radial blades, and then press out through the press-out chamber, so that the efficiency is improved, and the hydraulic flow stability is improved, but the bearing box cannot be made into a whole with the bearing box, and the axial length of the pump is increased, the volume and weight are increased, and the installation space requirement in the cabin is not met.

[0004] The radial flow guide vane structure improves the efficiency of the liquid cargo pump, is compact in structure, reduces the height of the pump body, and reduces the weight of the equipment, and is suitable for the requirement of the equipment structure in the ship and floating device.

[0005] The existing technology has the problems of increased pump body height, large overall appearance and unable to meet the installation requirement of the compact space in the cabin.

[0006] In view of the problems in the prior art, it is necessary to research and design a new low temperature immersed liquid pump radial flow guide vane structure for LNG ship and floating device to overcome the problems in the prior art. SUMMARY

[0007] The low temperature immersed liquid pump radial flow guide vane structure for LNG ship and floating device is provided to solve the problems of low pump efficiency, increased pump body height, large overall appearance and unable to meet the installation requirement of the compact space in the cabin. The utility model mainly installs bare body bearing in the bearing installation position in the flow guide shell, so that the volume of the pump is reduced, and the installation requirement of the compact space in the cabin is met.

[0008] The technical means adopted by the utility model are as follows:

[0009] A low-temperature submerged liquid pump radial flow guide vane structure for LNG ships and floating devices, comprising: a flow guide shell, a shaft, and a vane structure; the vane structure is sleeved on the shaft; a bearing box is assembled on the shaft, and the bearing box and the vane structure are encapsulated on the shaft and in the pump body through the flow guide shell;

[0010] Further, the shape of the flow guide shell is designed according to the shape of the vane structure;

[0011] Further, a bearing mounting position is arranged at the lower end shaft hole of the flow guide shell;

[0012] Further, the bearing box is cancelled, and a bearing is mounted in the bearing mounting position on the flow guide shell; after the bearing is mounted on the shaft, the bearing is fixedly installed through a round nut.

[0013] Further, a bearing bush is assembled between the bearing and the flow guide shell.

[0014] Further, the lower part of the flow guide shell is further assembled with a balance disc through a bolt;

[0015] Further, the balance disc plays a role of limiting the bearing in the axial direction.

[0016] Further, a spacer ring is further assembled between the bearing and the round nut.

[0017] Compared with the prior art, the utility model has the following advantages:

[0018] 1. The low-temperature submerged liquid pump radial flow guide vane structure for LNG ships and floating devices provided by the utility model cancels the independent bearing box body, reduces the shape size, and reduces the weight of the flow guide shell.

[0019] 2. The low-temperature submerged liquid pump radial flow guide vane structure for LNG ships and floating devices provided by the utility model reduces the shape size and the weight of the flow guide shell by designing the shape of the flow guide shell according to the shape of the vane.

[0020] In summary, the technical scheme of the utility model solves the problems of low pump efficiency, increased pump body height, large overall shape, and failure to meet the installation requirements of compact controls in the bin in the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor.

[0022] Figure 1 It is the structural schematic view of the utility model.

[0023] Figure 2 It is the structural schematic view of the utility model's flow guide shell.

[0024] Figure 3 It is the structural schematic view of the prior bearing box.

[0025] In the drawing: 1, flow guide shell 2, balance disc 3, bearing bush 4, shaft 5, bearing 6, 7, round nut 8, spacer ring. DETAILED DESCRIPTION

[0026] It should be noted that the embodiments and features in the embodiments in the utility model can be combined with each other without conflict. The utility model will be described in detail below with reference to the drawings and in combination with the embodiments.

[0027] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, not as any limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the scope of protection of the utility model.

[0028] It should be noted that the terms used here are only for describing the specific embodiments, not intended to limit the exemplary embodiments according to the utility model. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form, and in addition, it should be understood that when the terms "comprise" and / or "include" are used in the specification, it means that there is a feature, step, operation, device, component and / or its combination.

[0029] The foregoing description, for purposes of explanation, sets forth specific values and arrangements of components and steps that are subject to many options. The intent is to be accurate in describing the principles and novel features of the application. Thus, although the application has been described with reference to specific embodiments thereof, it will be apparent to those of ordinary skill in the art that a number of changes can be made thereto without departing from the spirit and scope of the application. For example, the various features of the application can be used in any combination or sub-combination thereof. Accordingly, the application is not to be limited by the above description but is to be given full scope of the appended claims.

[0030] In the description of the present application, it should be understood that the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" and the like indicated orientation or position relationship are usually based on the orientation or position relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, without making the opposite statement, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, therefore, it cannot be understood as a limitation on the scope of protection of the present application: the orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.

[0031] For the convenience of description, spatial relative terms such as "over", "above", "upper surface", "upper" and the like can be used herein to describe the spatial position relationship of one device or feature with other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the drawings. For example, if the device in the drawing is inverted, the device described as "above" or "over" other devices or structures will be positioned "below" or "under" other devices or structures. Thus, the example term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative description used herein is interpreted accordingly.

[0032] In addition, it should be noted that the use of "first", "second" and the like words to limit parts, only for the convenience of distinguishing the corresponding parts, if there is no further declaration, the above words have no special meaning, therefore, it cannot be understood as a limitation on the scope of protection of the present application.

[0033] As shown in the drawings, the utility model provides a kind of low temperature submerged pump radial flow guide vane structure for LNG ship and floating device, comprising: guide vane shell 1, shaft 4, guide vane structure;Guide vane structure is sleeved on shaft 4;Shaft 4 is assembled bearing box, and bearing box and guide vane structure are encapsulated on shaft 4 and pump body by guide vane shell 1;

[0034] The outer shape of guide vane shell 1 is designed according to the shape of guide vane structure;Bearing mounting position is arranged at the lower end shaft hole of guide vane shell 1;Cancel bearing box, bearing 5 is installed in bearing mounting position on guide vane shell 1, bearing 5 is fixedly installed after being installed on shaft.

[0035] Bearing bush 3 is assembled between bearing 5 and guide vane shell 1.

[0036] The lower part of guide vane shell 1 is also assembled with balance disc 2 by bolt;Balance disc 2 plays the role of axial limiting bearing 5.

[0037] Spacing ring 8 is also assembled between bearing 5 and round nut 7.

[0038] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the utility model, and are not limited thereto;Although the utility model has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement to part or all of the technical features;And these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A radial flow guide vane structure for a cryogenic immersed liquid pump for LNG carriers and floating units, comprising: The guide shell (1), the shaft (4), the guide vane structure; the guide vane structure is sleeved on the shaft (4), and the guide vane structure is packaged on the shaft (4) and in the pump body through the guide shell (1); characterized in that: The outer shape of the guide shell (1) is designed according to the shape of the guide vane structure; The lower end shaft hole of the guide shell (1) is provided with a bearing mounting position; The bearing (5) is installed in the bearing mounting position on the guide shell (1), and the bearing (5) is fixedly installed on the shaft through the round nut (7) after being installed on the shaft.

2. The radial flow guide vane structure of the low-temperature submerged liquid pump for LNG ships and floating devices according to claim 1, characterized in that: The bearing (5) and the guide shell (1) are assembled with a bearing bushing (3).

3. The radial flow guide vane structure of the low-temperature submerged liquid pump for LNG ships and floating devices according to claim 2, characterized in that: The lower part of the guide shell (1) is further assembled with a balance disc (2) through bolts; The balance disc (2) plays a role in limiting the axial direction of the bearing (5).

4. The radial flow guide vane structure of the low-temperature submerged liquid pump for LNG ships and floating devices according to claim 1, characterized in that: The bearing (5) and the round nut (7) are further assembled with a spacing ring (8).

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