Pumping serial mechanical seal device and pumping ring thereof

Abstract

The invention provides a pumping serial mechanical seal device and a pumping ring thereof. A movable ring component (21) of a secondary mechanical seal (2) is fixedly connected with the pumping ring (6); through holes (63) are distributed and formed in the periphery of the pump ring part (61) of the pumping ring (6); grooves (65) with opened left sides, corresponding to the through holes (63) are formed; a movable ring component spring tailstock (22) of the secondary mechanical seal is provided with diversion through holes (25); and the rear end part of a static friction ring (43) on an inner gland (4) is provided with a diversion through hole (45) communicated with the inner cavity of a gland (5). The pumping serial mechanical seal device is simple in structure and convenient in manufacture, and can be used for simultaneously pumping and circulating seal blocking liquids in the left and right cavities of the pumping ring (6), improving the flowing property of the seal blocking liquids in the cavities and preventing impurities from being accumulated.

Description

technical field [0001] The invention relates to a mechanical seal device for a pump, in particular to a serial mechanical seal device for a pump. Background technique [0002] The tandem mechanical seal device for pumps includes two-stage spring-type mechanical seal device, shaft sleeve, inner gland, and outer gland. The moving ring assembly of the two-stage spring-type mechanical seal device is connected with the shaft sleeve. The static ring assembly of the device is connected with the inner gland and the outer gland respectively, and the inner gland and the outer gland are docked with the pump body. In order to prevent the medium in the pump chamber from leaking outward, a blocking seal is provided on the outer gland. The liquid enters and exits the liquid hole, and the blocking liquid is passed into the secondary mechanical seal cavity. The blocking liquid simultaneously takes away the heat generated by the friction of the secondary mechanical seal, that is, cools the se...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, the shaft sleeve of the pumping ring is fitted and fixedly mounted on the tailstock of the moving ring assembly of the secondary mechanical seal. The tailstock of the ring assembly divides the inner cavity of the outer gland into two left and right chambers, both of which are filled with blocking liquid, that is, the rear part of the primary seal and the secondary sealing chamber are filled with blocking liquid, However, the L groove or through hole of the pumping ring can only function in the right chamber of the outer gland, and the blocking liquid only circulates in the right chamber of the pumping ring, while the blocking liquid in the left chamber of the pumping ring is Without circulation, the heat in the left chamber of the pumping ring cannot be taken away by the flow of the blocking liquid, and the left chamber of the pumping ring is closed for a long time and is prone to accumulate impurities, which will have a negative impact on the safe operation of the mechanical seal

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