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Active adaptive control mechanical seal device and control method

A mechanical sealing device and self-adaptive control technology, which is applied in the direction of engine sealing, mechanical equipment, engine components, etc., can solve problems such as low safety and reliability, complex feedback actuators, and poor measurement operability, so as to reduce energy consumption and simplify Effect of control system and improved operability

Active Publication Date: 2011-12-28
NANJING XIANGRUI INTELLIGENT EQUIP TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is to propose a controllable mechanical seal with a simple structure, using the system medium and its pressure difference as the control source, aiming at the poor operability of the measurement of the feedback parameters of the controllable mechanical seal, the complexity of the feedback actuator, or the low safety and reliability. , An adaptive control mechanical seal device that responds actively and quickly to changes in the working conditions of the seal in a pre-programmed and controlled manner

Method used

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  • Active adaptive control mechanical seal device and control method
  • Active adaptive control mechanical seal device and control method
  • Active adaptive control mechanical seal device and control method

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Experimental program
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Effect test

Embodiment 1

[0054] image 3Represents the active adaptive control mechanical seal device of Embodiment 1 of the present invention, which includes a set of common mechanical seals (stationary ring, moving ring, spring and moving ring seat) and a set of active control system. A moving ring assembly composed of a moving ring 12, a compensating spring 14 and a moving ring seat 16. When installing, place the static ring 11 with the hollow bellows 9 on the shaft 1 or the shaft sleeve 23 (in this embodiment, the static ring is sleeved on the shaft sleeve), the moving ring assembly, and place the end gland 6 and Between the fluid working elements 20 of the sealed equipment. A shaft sleeve 23 is sleeved on the shaft 1, and the shaft sleeve and the shaft are connected by a key 32 to limit the circumferential freedom of the shaft sleeve. Fasten the moving ring seat 16 to the shaft sleeve 23 with 3 hexagon socket bolts evenly distributed in the circumferential direction on the moving ring seat 16 ....

Embodiment 2

[0064] Figure 5 The active self-adaptive control mechanical seal device according to Embodiment 2 of the present invention is the same as Embodiment 1 except for the following differences from Embodiment 1, and will not be repeated here. Embodiment 2 Compared with Embodiment 1, in Embodiment 2, a sealing surface flushing inflow channel 31 is also provided on the casing of the sealed device. The sealing surface flushing inflow channel 31 extends along the radial direction of the moving ring, and its axis is aligned with the sealing surface (friction pair) of the moving ring and the static ring. The sealing surface flushing fluid flows into the channel 31 , the cooling fluid flows into the channel 7 and is connected to the high-pressure cooling fluid pipeline 8 . In addition, compared with Embodiment 1, Embodiment 2 does not have the compensating spring (elastic element) 14 in Embodiment 1.

[0065] For Embodiment 2, the cooling fluid inflow channel 7 can also be removed, and...

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Abstract

Aiming at the problems of poor measurement operability of controllable mechanical seal feedback parameters, complex feedback actuators or low safety and reliability, the present invention proposes an adaptive control mechanical seal device with simple structure and using the system medium and its pressure difference as the control source and control methods. Its structure includes a static ring and a moving ring that are set on the shaft and form a friction pair. A hollow bellows installed on the static ring that can sense the temperature of the static ring and is filled with a gas-liquid mixed medium is used to seal the sealed equipment. Fluid extraction from the high-pressure output end of the sealed cavity, flushing and cooling the hollow bellows and / or friction pairs in the sealed cavity, and then sending the fluid delivery pipeline to the low-pressure suction end of the sealed device, and the fluid delivery pipeline between the sealed cavity and the low-pressure suction end A regulating valve capable of regulating fluid flow is connected in series on the fluid delivery pipeline. Using the pressure difference between the high-pressure output end and the low-pressure suction end of the sealed equipment, a small amount of conveying fluid is introduced into the friction pair for flushing or outside the static ring hollow bellows for cooling, and the flow of cooling fluid is transmitted into the air through the hollow bellows. The pressure of the gas-liquid mixed medium in the gas tank of the regulating valve is adjusted by controlling the opening of the regulating valve.

Description

technical field [0001] The invention relates to the technical field of mechanical seals, in particular to a method that uses the system medium and its pressure difference as a control source to change the content of gas and liquid components in the hollow bellows after the static ring, adjust the end surface specific load and end surface temperature, and then realize low leakage. Self-adaptive control mechanical seal device with high volume and long life. Background technique [0002] Mechanical seal is an important functional element for mechanical equipment to prevent leakage, save energy, and control environmental pollution. The structure is as follows: figure 1 shown. A shaft sleeve 1-2 is sleeved on the shaft 1-1, and the shaft sleeve and the shaft are connected by threads to limit the circumferential and axial freedom of the shaft sleeve. The moving ring seat 1-10 cooperates with the two grooves uniformly distributed in the circumferential direction of the flange on ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16J15/16
Inventor 孙见君涂桥安何小元
Owner NANJING XIANGRUI INTELLIGENT EQUIP TECH CO LTD