Throw-out collar of mechanical sealing device and mechanical sealing device

Abstract

The invention relates to a throw-out collar of a mechanical sealing device and a mechanical sealing device. The throw-out collar with an axially perforated inner hole comprises a radially expanding collar body and an annular lug boss structure which convexly protrudes along the central shaft on one side surface, wherein an annular groove which is opened in the hole wall surface is arranged in the wall of the perforated inner hole; and a spacing structure is kept between the wall of the annular groove on the side in the lug boss structure direction and the end surface of the annular lug boss structure. According to the throw-out collar in such structure and the mechanical sealing device with the throw-out collar, many types of seal rings can be utilized to enhance the pressure resistance of the sealing. When the radial deformation of the throw-out collar occurs, the deformation amount and deformation cone angle of the corresponding component can be greatly reduced, thereby obviously lowering the unfavorable deformation of the stationary ring sealing end surface, and obviously enhancing the high pressure resistance of the sealing.

Description

technical field [0001] The invention relates to a push ring in a mechanical sealing device and a corresponding mechanical sealing device, and is especially suitable for the shaft end sealing device of various rotating machines including compressors, expanders, separators, pumps, and reactors. Background technique [0002] A typical mechanical seal structure such as figure 1 with figure 2 As shown, it includes a moving ring (1) which is axially fixed and can rotate with the shaft (12), and a non-rotating static ring (2) which is arranged opposite to the moving ring (1) through the shaft end sealing surface and can be used for axial floating. ), the moving ring (1) is fixed on the shaft sleeve (8) with its inner hole surface and / or non-sealed end surface through the transmission structure (13), and is further fixedly connected with the shaft (12); the static ring (2) is fixed through The push ring (3) and the elastic structure (6) arranged on the opposite side of its sealin...

AI Technical Summary

Problems solved by technology

Under the action of high medium pressure, the deformation of the inner cylinder of the static ring seat increases significantly, and the key point is that the inner cylindrical peripheral wall structure will present a near-conical deformation, which can significantly affect the floating of the push ring and the sealing performance of the sealing ring; Moreover, there are very significant stress concentrations at the two corners where the radial ring plane at the bottom of the static ring seat connects the inner and outer cylindrical peripheral walls, and plastic deformation or local cracks may occur;

[0004] 2) The types of sealing rings that can be used are limited

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