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Water-lubricated bearing suitable for seawater desalination and energy recovery all-in-one machine

A water-lubricated bearing and energy recovery technology, applied in the field of lubrication, can solve the problems of high pressure, pressure difference, affecting the economic efficiency and practicability of the integrated machine, and achieve the effect of improving stability

Pending Publication Date: 2022-03-15
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The speed of the turbine energy recovery integrated machine is as high as tens of thousands of revolutions, which requires high stability of the main shaft, while the working environment of the integrated machine water-lubricated bearing has the characteristics of high pressure and pressure difference between the two ends of the bearing, which has great restrictions on slotting; On the other hand, in the transitional stage of the start-up and shutdown of the all-in-one machine, the water-lubricated bearings are in direct contact, and the friction and wear are severe, which seriously affects the life of the bearing and affects the economic benefits and practicability of the all-in-one machine

Method used

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  • Water-lubricated bearing suitable for seawater desalination and energy recovery all-in-one machine
  • Water-lubricated bearing suitable for seawater desalination and energy recovery all-in-one machine
  • Water-lubricated bearing suitable for seawater desalination and energy recovery all-in-one machine

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Experimental program
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Effect test

Embodiment 1

[0027] In one implementation of the present invention, the first groove 3 and the second groove 8 are arranged axially symmetrically, the axis of the first flow channel 5, the second flow channel 10 and the bearing 2 are arranged on the same plumb plane, and the second The geometric centers of the first groove 3 and the second groove 8 are respectively offset by 10 to 15 degrees relative to the plumb surface in the opposite direction of the main axis rotation, such as figure 1 shown.

Embodiment 2

[0029] In another implementation of the present invention, the first groove 3 and the second groove 8 are arranged in axisymmetric manner, the geometric centers of the first groove 3 and the second groove 8, the first flow channel 5, and the second flow channel 10 and the axis line of the bearing 2 are arranged on the same plane. When assembling with the main shaft 1, the plane is offset by 10-15 degrees relative to the plumb surface in the opposite direction of the main shaft rotation, such as figure 2 shown.

[0030] In the above two implementations, the grooves can be replaced with H-shaped, Tian-shaped, Japanese-shaped, T-shaped, such as image 3 As shown, the functional principle is essentially the same as that of the present invention.

[0031] The working principle of the present invention is as follows:

[0032] In the transitional stage of start-up and shutdown of the seawater desalination energy recovery integrated machine, when the main shaft 1 rotates at a low s...

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Abstract

The invention provides a water-lubricated bearing suitable for a seawater desalination and energy recovery all-in-one machine, the water-lubricated bearing is made of 2205 bidirectional stainless steel materials, the whole water-lubricated bearing is of a hollow cylinder structure, and when the all-in-one machine operates, the fluid dynamic pressure lubrication effect of a water film between the bearing and a main shaft provides bearing force. The bearing wall is provided with two round-hole-shaped flow channels, wherein one flow channel is communicated with the end face on one side and the inner cylindrical face, and the other flow channel is communicated with the end face on the other side and the inner cylindrical face. And a groove is engraved around the runner opening on the inner wall surface of the bearing. The internal fluid pressure distribution rule of the all-in-one machine is ingeniously utilized, the water film pressure distribution of the water-lubricated bearing is adjusted, the frictional wear of the water-lubricated bearing in the start-stop transition stage is effectively reduced, and the effect of improving the stability of the rotor in the high-speed operation stage is achieved.

Description

technical field [0001] The invention belongs to the technical field of lubrication, and in particular relates to a water-lubricated bearing suitable for a seawater desalination energy recovery integrated machine. Background technique [0002] The seawater desalination energy recovery integrated machine uses the pressure of concentrated brine intercepted by the reverse osmosis membrane to pressurize fresh seawater. It is the core component of the seawater desalination system to save energy and ensure economy. [0003] Among them, the turbine-type energy recovery integrated machine integrates the booster pump and the energy recovery turbine coaxially. The main shaft is composed of the turbine impeller, the main shaft and the pump impeller, and is supported by water-lubricated bearings. The raw water pressurized by the pre-pump is further boosted to the working pressure of the reverse osmosis membrane through the pump impeller of the integrated machine, and the high-pressure co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/046F04D29/06
CPCF04D29/046F04D29/061
Inventor 李岩张德胜赵睿杰高雄发潘强黄亚冬
Owner JIANGSU UNIV