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Unpressurized LNG (Liquefied Natural Gas) immersed pump

A non-sealed, submersible pump technology, used in pumps, pump devices, pump components, etc., can solve the problems of submersible pump discharge that cannot be filled, unloaded, and take a long time to improve anti-cavitation performance, Improved unloading capacity, small size effect

Active Publication Date: 2015-11-25
HUZHOU SANJING CRYOGENIC EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the situation that the current common LNG tank car has a long time of leakage, or the situation that the submersible pump cannot be filled or unloaded when the liquid is discharged, the present invention provides a vehicle-mounted LNG non-sealed submersible pump to realize the rapid recovery of LNG. , effective unloading

Method used

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  • Unpressurized LNG (Liquefied Natural Gas) immersed pump
  • Unpressurized LNG (Liquefied Natural Gas) immersed pump

Examples

Experimental program
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Effect test

Embodiment 1

[0020] A kind of sealless LNG submersible pump, as attached figure 1 As shown, it includes a casing 1 forming a first cavity 11 and a second cavity 12, a pump main body set in the first cavity 11 through a pump main shaft, and a low temperature bearing 32 set in the second cavity 12. Drive motor; the second cavity 12 is located above the first cavity 11, the housing 1 has a liquid inlet 101 below the first cavity 11, and a liquid outlet 102 above the second cavity 12, LNG It is output from the liquid inlet 101 through the first cavity 11 and the second cavity 12 to the liquid outlet. The functional parts arranged along the pump main shaft 21, from the liquid inlet 101 to the liquid outlet 102, sequentially include the inducer 22, the first impeller 23, the first guide vane 24, the secondary housing 25, the secondary impeller 26, and the secondary guide vane 27 , the driving shaft 31 of the driving motor is arranged coaxially with the pump main shaft 21, and the secondary guid...

Embodiment 2

[0022] A kind of sealless LNG submersible pump, as attached figure 2 As shown, it includes a casing 1 forming a first cavity 11 and a second cavity 12, a pump main body set in the first cavity 11 through a pump main shaft, and a low temperature bearing 32 set in the second cavity 12. Drive motor; the second cavity 12 is located above the first cavity 11, the housing 1 has a liquid inlet 101 below the first cavity 11, and a liquid outlet 102 above the second cavity 12, LNG It is output from the liquid inlet 101 through the first cavity 11 and the second cavity 12 to the liquid outlet. The functional parts arranged along the pump main shaft 21, from the liquid inlet 101 to the liquid outlet 102, sequentially include the inducer 22, the first impeller 23, the first guide vane 24, the secondary housing 25, the secondary impeller 26, and the secondary guide vane 27 , the driving shaft 31 of the driving motor is arranged coaxially with the pump main shaft 21, and the secondary gui...

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Abstract

The invention relates to an unpressurized LNG (Liquefied Natural Gas) immersed pump. The unpressurized LNG immersed pump comprises a shell, wherein a first cavity and a second cavity are formed in the shell; a pump main body is arranged in the first cavity; a drive motor is arranged in the second cavity; a liquid inlet and a liquid outlet are formed in the shell; the second cavity is located above the first cavity; the drive shaft of the drive motor is arranged to be coaxial with the pump axle shaft; the outer side of the rotor and stator of the drive motor is provided with an isolating membrane which separates the rotor and stator from the second cavity; and a liquid outlet passage which communicates the first cavity and the liquid outlet is formed between the isolating membrane and the shell. A rotating shaft sealing device of a traditional centrifugal pump is omitted; zero leakage can be realized; the sealing reliability is high; besides, the structure is compact; the weight is light; the size is small, so that the unpressurized LNG immersed pump is suitable for being mounted on vehicles; a bearing is immersed in a medium, so that the bearing is greased by fully utilizing the medium; and outlet liquid is utilized for cooling the motor and the bearing, and taking heat away, so that the service life of the pump and the motor is greatly prolonged.

Description

technical field [0001] The invention relates to the field of LNG transportation equipment, in particular to a sealless LNG submersible pump required for natural gas applications such as petroleum, chemical industry and ships. Background technique [0002] With the development of natural gas application in China, especially the transshipment of liquefied natural gas requires a large number of delivery pumps. [0003] At present, the unloading of tank trucks on the market mainly adopts the self-pressurized unloading of the gas station or the submersible pump for filling to unload the liquid. It is common that the unloading time is long or the gas filling station cannot refill during unloading, and: 1) the self-pressurized unloading also has the situation that the residual pressure of the tank car is high after unloading and the gas storage capacity is large; 2) the submersible The liquid pump is unloading, and the LNG dosing machine cannot work normally, otherwise the tank tr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D13/08F04D1/08F04D29/06F04D29/58F04D29/44
Inventor 汪国洪吴波段晚儿
Owner HUZHOU SANJING CRYOGENIC EQUIP
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