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Mechanical seal cooling structure, high-temperature hot water circulating pump with mechanical seal cooling structure and method

A technology of cooling structure and high-temperature hot water, which is applied to the components, pumps, and pump components of pumping devices for elastic fluids, can solve the problems of poor cooling effect of high-temperature circulating pumps, etc., to solve the problems of poor cooling effect, The effect of extending the cooldown time and strengthening the cooling effect

Pending Publication Date: 2021-08-06
高道密封科技(苏州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] One of the purposes of the present invention is to solve the problem of poor cooling effect of high temperature circulating pumps in the prior art

Method used

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  • Mechanical seal cooling structure, high-temperature hot water circulating pump with mechanical seal cooling structure and method
  • Mechanical seal cooling structure, high-temperature hot water circulating pump with mechanical seal cooling structure and method
  • Mechanical seal cooling structure, high-temperature hot water circulating pump with mechanical seal cooling structure and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] A mechanical seal cooling structure applied to high temperature hot water circulating pumps, wherein, such as figure 1 As shown, it includes: shaft sleeve 1, connecting seat 2, throttle ring 4.

[0055] The connecting seat 2 is sheathed on the shaft sleeve 1, and there is a hot water chamber 3 for passing hot water between the connecting seat 2 and the shaft sleeve 1.

[0056] Such as Figure 1-3 As shown, the throttling ring 4 is located in the hot water chamber 3, and the throttling ring 4 divides the hot water chamber 3 into left and right parts. The flow gap H is connected, so that the high-temperature hot water flows through the hot water chamber 3, and is blocked by the throttle ring 4, and then the flow volume of the hot water is limited through the flow gap H so that the hot water is connected with the throttle ring 4 Seat 2 fully exchanges heat.

[0057] The throttle ring 4 has a casing hole 5 and a buffer cooling groove 6 , and the throttle ring 4 is sleeve...

Embodiment 2

[0072] A mechanical seal cooling structure, which is applied to high-temperature hot water circulating pumps, has the same characteristic structure as that of Embodiment 1, wherein, such as image 3 As shown, the ratio of the flow gap H formed by the outer end surface of the throttle ring 4 and the inner surface of the connecting seat 2 to the size of the hot water chamber 3 can also be set to 0.03:0.97. The size of the overcurrent gap H is 0.5mm or cm or dm or m.

[0073] After many tests, under the condition of high temperature hot water at 260°C, with this setting, after the high temperature hot water passes through the overflow gap H, its temperature will drop by about 150°C. And it is also found that this is the best choice found at present. If the size of the overflow gap H continues to be reduced, the problem of reducing the cooling effect on the mechanical seal may occur when the hot water is circulated (too little water flow for cooling flow) .

Embodiment 3

[0075] A high-temperature hot water circulation pump, which has the mechanical seal cooling structure in any one of the above-mentioned embodiment 1 or 2.

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Abstract

The invention discloses a mechanical seal cooling structure, and relates to the technical field of mechanical cooling. The structure comprises a shaft sleeve, a connecting seat and a throttling ring. The throttling ring is arranged in a hot water cavity between the shaft sleeve and the connecting seat, so that an overflowing gap is formed in the hot water cavity, the flowing space of the hot water cavity is reduced, firstly, the flowing volume of hot water is limited to achieve heat exchange and cooling of the hot water, and buffering cooling grooves distributed on the side of the throttling ring act; secondly, the hot water in the flowing gap can be buffered, the cooling time is prolonged, and the cooling effect is enhanced; and thirdly, when the throttling ring rotates, the buffering cooling grooves play a role in labyrinth sealing, that is, after the throttling ring rotates, the hot water passes through each buffering cooling groove when passing through, and the cooling time is further prolonged. The throttling ring for throttling is applied to a high-temperature hot water circulating pump, the throttling performance of the throttling ring is brought into full play, the effect of combining buffering and cooling is achieved, cooling is effective, and the problem that in the prior art, the cooling effect of the high-temperature hot water circulating pump is poor is solved.

Description

technical field [0001] The invention relates to the technical field of mechanical cooling, in particular to a mechanical seal cooling structure. Background technique [0002] In the Hualong No. 1 nuclear power technology, the containment heat export pump is an important part of the containment heat export system. It is mainly used to take water from the containment refueling water tank (IRWST) (the water intake is equipped with a filter screen) for containment spraying, active pit water injection and pit filter backwashing under the conditions beyond the design reference, thereby limiting the safety The pressure inside the shell and the guaranteed decay heat are exported from the containment shell. It plays an important role in the safe operation of a class of nuclear power plants using Hualong No. 1 nuclear power technology. The containment heat export pump used in Hualong No. 1 nuclear power technology requires mechanical seals and auxiliary systems to have extremely hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/58F04D29/10F04D29/12F04D29/04
CPCF04D29/5886F04D29/106F04D29/126F04D29/04
Inventor 韩伟黄虎张凯
Owner 高道密封科技(苏州)有限公司
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