High-reliability-196 DEG C-resistant immersed pump motor top cover immersed in LNG (Liquefied Natural Gas) medium

Abstract

The utility model discloses a high reliability-196 DEG C resistant immersed pump motor top cover immersed in LNG medium, and relates to the immersed pump field, the high reliability-196 DEG C resistant immersed pump motor top cover comprises a first cover body, a second cover body and a plurality of locking members, the first cover body is connected on the second cover body, the first cover body and the second cover body are forgings, and the first cover body and the second cover body are connected and fixed through the plurality of locking members. The high-reliability-196 DEG C-resistant immersed pump motor top cover immersed in the LNG medium, provided by the utility model, adopts a combined forging numerical control machining structure, can greatly improve the yield and quality of finished products, reduce the defects of parts, avoid the situation that the parts are easy to break in a low-temperature environment, can normally work in the environment of 196 DEG C, is higher in reliability, and can be widely applied to the field of LNG (liquefied natural gas) engines. And the structure is simpler, manufacturing and machining are easy, and the size precision and the surface smoothness of parts are higher.

Description

Technical Field

[0001] The utility model relates to the field of submersible pumps, in particular to a submersible pump motor top cover with high reliability and resistance to -196°C immersed in LNG medium. Background Art

[0002] A submersible pump generally includes a motor top cover, a pump body housing, a motor, an impeller, a motor bottom cover, etc. Among them, the motor top cover is fixed on the pump body housing, and the motor and the impeller are installed inside the pump body housing; during operation, the entire pump body and the motor are immersed and installed in a sealed metal container filled with LNG medium; due to the low-temperature characteristics of LNG, the submersible pump is required to have the performance of withstanding low temperatures.

[0003] At present, this kind of submersible pump motor top cover is generally an integral aluminum alloy casting. This casting structure will result in a low finished product yield and unsatisfactory finished product quality, and may crack and break in a low-temperature environment, that is, it cannot work normally in an environment of -196°C.

[0004] Therefore, it is necessary to design a new structure for the submersible pump motor top cover to ensure the finished product rate and quality, and ensure normal operation in a low-temperature environment of -196°C. Summary of the Utility Model

[0005] In view of the above deficiencies, the utility model provides a submersible pump motor top cover with high reliability and resistance to -196°C immersed in LNG medium, which has a high finished product yield and quality, high reliability, is not prone to fracture in a low-temperature environment, can work normally in an environment of -196°C, and has a simple structure and is easy to manufacture and process.

[0006] To achieve the above object, the embodiments of the utility model adopt the following technical solutions:

[0007] A submersible pump motor top cover with high reliability and resistance to -196°C immersed in LNG medium, including a first cover body, a second cover body, and a plurality of locking members. The first cover body is connected to the second cover body, and both are forgings, and the two are connected and fixed by a plurality of locking members.

[0008] According to one aspect of the utility model, a connection groove is provided inside the first cover body, and a connection protrusion is provided on the second cover body, and the connection protrusion is connected in the connection groove.

[0009] According to one aspect of the utility model, a plurality of first connection holes are provided on the first cover body, and a plurality of second connection holes are provided on the second cover body. The plurality of first connection holes are aligned with the plurality of second connection holes one by one, and the second connection holes are regularly distributed around the connection protrusion.

[0010] According to one aspect of the utility model, one end of the locking member is connected in the first connection hole and the other end is connected in the second connection hole.

[0011] According to one aspect of the present utility model, the first connection hole is a light hole or a threaded hole, the second connection hole is a threaded hole, the connection groove is a circular groove, and the connection protrusion is a columnar protrusion.

[0012] According to one aspect of the present utility model, it further includes a sealing ring, and the sealing ring is arranged between the first cover body and the second cover body.

[0013] According to one aspect of the present utility model, a sealing groove is provided on the second cover body, and the sealing ring is installed in the sealing groove.

[0014] According to one aspect of the present utility model, both the first cover body and the second cover body are made of aluminum alloy material.

[0015] According to one aspect of the present utility model, a liquid extraction flow channel is provided in the second cover body, a liquid extraction channel is provided in the first cover body, and the liquid extraction flow channel is communicated with the liquid extraction channel.

[0016] Advantages of the implementation of the present utility model: By optimizing the original top cover of the submersible pump motor into a combined structure connected by a first cover body and a second cover body, and manufacturing it by numerical control machining of forgings. Compared with the integral aluminum alloy casting structure of the original top cover of the submersible pump motor, the defects of the parts of the present utility model are reduced, the finished product yield and the finished product quality are greatly improved, it is not easy to break in a low-temperature environment, and it can work normally in an environment of -196°C. At the same time, the structure is simpler and easier to manufacture and process; after manufacturing by numerical control machining of forgings, the dimensional accuracy and surface finish of the parts are also higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a structural schematic diagram of the present utility model;

[0019] Figure 2 It is an exploded schematic diagram of the present utility model;

[0020] Figure 3 It is a partial schematic diagram when the present utility model is applied and installed.

[0021] The names corresponding to the serial numbers in the figure are as follows:

[0022] 1. First cover body; 2. Second cover body; 3. Connecting groove; 4. Connecting protrusion; 5. First connecting hole; 6. Second connecting hole; 7. Sealing groove; 8. Liquid extraction flow channel; 9. Liquid extraction channel; 10. Pump body housing. Specific implementation mode

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention. In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "top", "bottom", "one side", "the other side", "front", "rear", "middle part", "inside", "top end", "bottom end", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0024] As Figure 1 , Figure 2 , Figure 3 shown, a highly reliable submersible pump motor top cover resistant to -196°C immersed in LNG medium is installed on the submersible pump; this submersible pump motor top cover includes a first cover body 1, a second cover body 2, and several locking parts. This submersible pump motor top cover separates the original integral casting structure of the submersible pump motor top cover into a forging structure of two cover bodies. Among them, both the first cover body 1 and the second cover body 2 are integrally forged from aluminum alloy materials and then subjected to numerical control machining operations such as internal hole drilling. Both the first cover body 1 and the second cover body 2 are rotary part structures; the first cover body 1 is connected to the second cover body 2, and the two are connected and fixed by several locking parts. By setting the original submersible pump motor top cover into two separate parts, the first cover body 1 and the second cover body 2, manufacturing by forging numerical control machining, and then connecting and fixing with locking parts to form a combined structure. Compared with the original integral aluminum alloy casting structure of the submersible pump motor top cover, the structure is simpler, easier to manufacture and process, reduces component defects, greatly improves the finished product yield and quality, is not prone to fracture in a low-temperature environment, can work normally in an environment of -196°C, and improves the dimensional accuracy and surface finish of the components.

[0025] In practical applications, a circular connecting groove 3 is provided at the bottom of the first cover body 1, and a columnar connecting protrusion 4 is provided above the second cover body 2. The connecting protrusion 4 is connected in the connecting groove 3; in this way, it is convenient for the positioning and installation of the first cover body 1 and the second cover body 2, and the structural connection can also be made more compact.

[0026] In practical applications, a number of first connection holes 5 are provided on the first cover body 1, and a number of second connection holes 6 are provided on the second cover body 2. The number of first connection holes 5 and the number of second connection holes 6 are aligned one by one. The second connection holes 6 are regularly distributed around the connection protrusion 4. One end of the locking member is connected in the first connection hole 5 and the other end is connected in the second connection hole 6. The first connection hole 5 is a smooth hole or a threaded hole, the second connection hole 6 is a threaded hole, and the locking member is a bolt-like fastener. Through the settings of the first connection hole 5, the second connection hole 6, the locking member, etc., it is convenient to connect and fix the first cover body 1 and the second cover body 2.

[0027] In practical applications, the submersible pump motor top cover of the present invention further includes a sealing ring, and the sealing ring is provided between the first cover body 1 and the second cover body 2. An annular sealing groove 7 is provided on the second cover body 2, and the annular sealing groove 7 is concentrically arranged on the outer ring of the connection protrusion 4. The sealing ring is installed in the sealing groove 7. In this way, it is convenient to enhance the structural sealing performance.

[0028] In practical applications, a liquid extraction flow channel 8 is provided in the second cover body 2, and a liquid extraction channel 9 is provided in the first cover body 1. The liquid extraction flow channel 8 and the liquid extraction channel 9 are communicated, and the two are used for the outflow of liquid during the operation of the submersible pump. During actual installation, after the first cover body 1 is fixed to the second cover body 2, that is, after the submersible pump motor top cover is installed, the second cover body 2 is installed on the pump body housing 10 of the submersible pump.

[0029] A manufacturing method of a submersible pump motor top cover includes the following steps:

[0030] Blank cutting, forging blanks of the first cover body 1 and the second cover body 2 by using aluminum alloy materials;

[0031] Hole machining, respectively performing operations such as drilling and boring on the blanks of the first cover body 1 and the second cover body 2 through a numerical control machine tool;

[0032] Deburring, performing operations such as grinding on the blanks of the first cover body 1 and the second cover body 2 after hole machining to form finished products;

[0033] Assembly, using bolt-like fasteners to lock and fix the first cover body 1 and the second cover body 2, and assembling them into the final finished product of the submersible pump motor top cover.

[0034] Advantages of the implementation of the present invention: By optimizing the original submersible pump motor top cover into a combined structure connected by the first cover body 1 and the second cover body 2, and manufacturing by numerical control machining of forgings, compared with the integral aluminum alloy casting structure of the original submersible pump motor top cover, the defects of the parts of the present invention are reduced, the yield rate and quality of the finished products are greatly improved, the reliability is high, it is not easy to break in a low-temperature environment, and it can work normally in an environment of -196°C. At the same time, the structure is simpler and easier to manufacture and process; after manufacturing by numerical control machining of forgings, the dimensional accuracy and surface finish of the parts are also higher.

[0035] As described above, it is only the specific implementation manner of the present utility model. However, the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed by the present utility model should be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claimed rights.

Claims

1. A submersible pump motor top cover with high reliability and resistance to -196°C immersed in LNG medium, characterized in that, It includes a first cover body (1), a second cover body (2), and several locking parts. The first cover body (1) is connected to the second cover body (2), both of which are forgings, and they are connected and fixed by several locking parts.

2. The submersible pump motor top cover according to claim 1, characterized in that A connecting groove (3) is provided in the first cover body (1), and a connecting protrusion (4) is provided on the second cover body (2). The connecting protrusion (4) is connected in the connecting groove (3).

3. The submerged pump motor top cover according to claim 2, characterized in that, Several first connecting holes (5) are provided on the first cover body (1), and several second connecting holes (6) are provided on the second cover body (2). The several first connecting holes (5) are aligned with the several second connecting holes (6) one by one, and the second connecting holes (6) are regularly distributed around the connecting protrusion (4).

4. The submerged pump motor top cover according to claim 3, characterized in that, One end of the locking part is connected in the first connecting hole (5), and the other end is connected in the second connecting hole (6).

5. The submerged pump motor top cover according to claim 3, characterized in that, The first connecting hole (5) is a smooth hole or a threaded hole, the second connecting hole (6) is a threaded hole, the connecting groove (3) is a circular groove, and the connecting protrusion (4) is a columnar protrusion.

6. The submersible pump motor top cover according to claim 1, wherein It further includes a sealing ring, and the sealing ring is arranged between the first cover body (1) and the second cover body (2).

7. The submerged pump motor top cover according to claim 6, characterized in that, A sealing groove (7) is provided on the second cover body (2), and the sealing ring is installed in the sealing groove (7).

8. The submerged pump motor top cover according to claim 1, characterized in that, Both the first cover body (1) and the second cover body (2) are made of aluminum alloy material.

9. The submersible pump motor top cover according to claim 8, characterized in that, A liquid extraction flow channel (8) is provided in the second cover body (2), and a liquid extraction channel (9) is provided in the first cover body (1). The liquid extraction flow channel (8) and the liquid extraction channel (9) are communicated.

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