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Controllable mechanical seal based on closing force change

A mechanical seal, closing force technology, applied in the direction of engine seal, mechanical equipment, engine components, etc., can solve the problems of slow dynamic control response and poor reliability of mechanical seals

Inactive Publication Date: 2014-12-03
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] In order to expand the working range of the mechanical seal, improve the service life and working reliability of the seal, and solve the main contradiction of ensuring low friction and low wear of the sealing pair while ensuring low leakage, the present invention proposes a controllable seal based on changing the closing force. type mechanical seal; solve the actual situation of slow response and poor reliability of the existing mechanical seal dynamic control; through the introduction of an axial force electromagnetic loading device and end surface friction torque test device, the dynamic control of the seal is realized

Method used

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  • Controllable mechanical seal based on closing force change
  • Controllable mechanical seal based on closing force change
  • Controllable mechanical seal based on closing force change

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Embodiment 1

[0036] In order to expand the working range of the mechanical seal, improve the service life and working reliability of the seal, and solve the main contradiction of ensuring low friction and low wear of the sealing pair while ensuring low leakage, the present invention proposes a controllable seal based on changing the closing force. Type mechanical seal, (controllable mechanical seal is classified according to the controlled quantity, which can be divided into the following two types: one is to control the working condition of the sealing by adjusting the opening force, and the other is to control the working condition of the sealing by adjusting the closing force According to the control method of the mechanical seal, it can be divided into two types: open loop and closed loop; the earliest controllable mechanical seals are all adjusted to the closing force through the open loop control system.) Including the static ring seat 2, the installation The electromagnetic loading d...

Embodiment 2

[0043] The technical scheme of sealing control proposed in this proposal is to adjust the closing force of the sealing by changing the dynamic compensation force of the sealing to realize the closed-loop control of the sealing. attached figure 1 A structural schematic diagram of a mechanical seal is given. The dynamic compensation force is supplied and realized by the axial electromagnetic loading device 13 loaded on the end cover part, such as Figure 4 shown.

[0044] After using the electromagnetic loading device 13, the closing force of the mechanical seal is composed of three parts, namely the spring compensation unit F s , The hydrostatic pressure load F caused by the seal gap fluid d and the electromagnetic force F provided by the electromagnetic loading device 13 e .

[0045] f c =F d +F s +F e (1)

[0046] After monitoring and comparing the state parameters of the controllable seal during operation, the state of the seal can be controlled by changing the m...

Embodiment 3

[0073] attached figure 1 A schematic diagram of the mechanical seal structure is given, with Figure 4 A schematic diagram of the structure of a controllable mechanical seal with an electromagnetic loading device is given.

[0074] As mentioned earlier, the closing force of most previous sealing devices is determined by the hydrodynamic and static pressure F in the sealing gap d and spring force F s Composition, in the process of sealing operation, dynamic adjustment cannot be realized, it can only be realized by changing the number of springs in the stop state. Therefore, an electromagnetic loading closing force control device is introduced, which can realize real-time adjustment of the sealing closing force during operation, so as to more effectively study the influence of axial load on the sealing performance and the controllability of the sealing.

[0075] Most of the existing mechanical seals and their device systems test the seal power consumption, including the motor...

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Abstract

The invention relates to a controllable mechanical seal device, in particular to a controllable mechanical seal based on closing force change. The controllable mechanical seal comprises a stationary ring seat, an electromagnetic loading device mounted on the stationary ring seat as well as a friction torque sensor unit and a U-shaped plug which are arranged on the electromagnetic loading device. The principle of the controllable mechanical seal is that the mechanical seal is controlled by the electromagnetic loading device capable of changing closing force. According to the scheme, a method for directly testing friction of a seal face and the seal face temperature rising is provided and applied to the controllable mechanical seal device; the seal is actively controlled by controlling the current change of the electromagnetic loading device; and the controllable mechanical seal can be used for related engineering fields such as aerospace, petrochemical engineering, energy power and the like and can be used in engineering equipment such as pumps, compressors, reaction kettles, expansion machines, separators and the like.

Description

technical field [0001] The invention relates to a controllable mechanical seal based on changing the closing force, which can be used in aerospace, petrochemical, energy and power and other related engineering fields, and can be used in gas turbines, various pumps, compressors, reactors, expanders, separators, etc. Applicable to engineering equipment. Background technique [0002] Mechanical seals have been widely used in many industrial productions, especially in petrochemical, aerospace, energy and power fields. Most of the mechanical seal patents under development are dedicated to the study of increasing the number of sealing stages and changing the shape of the sealing surface to achieve the stability and wear resistance of the seal, thereby improving its service life and reliability; such as the patent application 200880117493.X proposed A mechanical seal and a tandem type seal that can obtain suitable sliding characteristics under any conditions such as low or high pr...

Claims

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Application Information

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IPC IPC(8): F16J15/16F16J15/53
Inventor 张国渊赵伟刚段清娟陈永琴胡锐锋
Owner XIDIAN UNIV
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