CN201148990Y

CN201148990Y - Pump shaft mechanical sealing device

Info

Publication number: CN201148990Y
Application number: CNU2007200593801U
Authority: CN
Inventors: 孙臣军
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-11-09
Filing date: 2007-11-09
Publication date: 2008-11-12
Anticipated expiration: 2017-11-09

Abstract

The utility model provides a mechanical sealing device of a pump shaft, which can effectively solve the problem of leakage in the pump shaft seal position and improve working efficiency. An O-shaped ring of a moving ring is arranged on the outer end surface of the moving ring; an O-shaped ring of a static ring presses and seals between the static ring and an end surface gland; a spring is arranged inside a sealing chamber of a pump body and keeps the moving ring and the static ring in close contact; an adjusting ring is arranged between the end surface gland and the pump shaft and can automatically correct the perpendicularity of the end surface of the mechanical sealing device and the pump shaft; a flow reflector is arranged between the static ring and a connecting bolt of the gland and enables cooling water to uniformly flush the friction surfaces of the moving and the static rings; and auxiliary blades are arranged on the moving ring. The mechanical sealing device is technically characterized by simple structure, easy and convenient operation, corrosion resistance, fatigue resistance, good sealing effect, long service life, etc.

Description

The pump shaft mechanical seal device

Technical field

The utility model relates to a kind of seal arrangement of pump shaft, refers to a kind of mechanical seal device especially.

Background technique

Widely used various types of centrifugal pumps exist a leakage problem in various degree in chemical industry and other industry, in order to solve the leakage between pump case and the pump shaft, always adopt single end surface mechanical sealing, its deficiency is that sealing effect is poor, when being corrosive liquids in the pump, the corrosive liquid that leaks is known from experience and is being carried solid impurity secretly and the plucking sealing surface causes the increase of leakage rate, the destruction of equipment and the pollution of environment; And, reduced the rigidity of liquid piston in the pump because sealing effect is relatively poor, cause the efficient deficiency of pump.

Summary of the invention

For overcoming the shortcomings and deficiencies of prior art, the utility model proposes a kind of mechanical seal device, this device can overcome the shaft sealing leakage of pump effectively, improves the efficient of pump.

For achieving the above object, the utility model is achieved by the following technical solutions: the pump shaft mechanical seal device comprises pump shaft, the pump housing, rotating ring and stationary ring, the end face gland, positioning block, the positioning block screw, driving pin, rotating shaft O type snare becomes annexation movingly on pump shaft and with pump shaft, stationary ring and rotating ring are connected on the end face gland by connecting sleeve, wherein, rotating ring presses in the pump shaft end, stationary ring is loaded on end face gland inboard, the end face gland is connected to the pump housing by the gland connecting bolt, described rotating ring is provided with follows the auxiliary blade that pump shaft rotates, rotating ring O type circle is equipped with in the rotating ring exterior edge face, between stationary ring and end face gland, compress sealing by stationary ring O type circle, the Seal cage of the described pump housing is built-in with one and can pressure is provided and makes dynamic and static ring keep the closely spring of contact to dynamic and static ring, between end face gland and pump shaft, be provided with the adjustment ring of automatically calibrating mechanical seal device end face and pump shaft perpendicularity, be provided with the baffle that can make the flushing cooling water evenly wash cooling dynamic and static ring rubbing surface between described stationary ring and the gland connecting bolt.

Further measure is: above-mentioned baffle is the covering of the fan flow passage structure, and stop pin and fixing stationary ring are installed on the described stationary ring, and stop pin be axial installation.

Mechanical seal device of the present utility model has simple in structure, easy to operate, corrosion-resistant, endurance and good seal performance, characteristics such as long service life.

Compared with prior art, the utlity model has following obvious improvement and outstanding characteristics:

1, novel structure, reasonable in design, easy to operate.

2, corrosion-resistant, endurance, good sealing effect, the efficient of raising pump.

3, long service life.

Description of drawings

The utility model is described in further detail below in conjunction with drawings and Examples.

Fig. 1 is the surface structure schematic representation of pump shaft mechanical seal device.

Fig. 2 is the cross-sectional schematic of pump shaft mechanical seal device.

Embodiment

With reference to Fig. 1, shown in Figure 2, the rotating shaft O type circle 1 of pump shaft mechanical seal device is placed on the pump shaft 18, and with 18 one-tenth of pump shafts annexation movingly closely, can prevent that water or the oily medium in the cavity from outbound flowing by rotating shaft; Connecting sleeve 9 is connected to stationary ring 13 and rotating ring 11 on the end face gland 6, and wherein, rotating ring 11 is pressed on the end of pump shaft 18 and rotates with pump shaft, and stationary ring 13 is installed in end face gland 6 inboards and does not rotate with pump shaft; In stationary ring 13 upper edge pump shaft directions stop pin 14 is installed, can has rotation inhibiting effect and axially movable leading role stationary ring 13; Gland connecting bolt 15 is connected to the pump housing with end face gland 6, and positioning block 8 is fixing by positioning block screw 7.Rotating ring O type circle 2 is installed in the exterior edge face of rotating ring 11 and seals rotating ring, plays to stop water to enter spring 3, prevents that spring is corroded, stops up, and keeps elastic force, thus the effect that keeps dynamic and static ring to combine closely; Stationary ring O type circle 4 is installed between stationary ring 13 and the end face gland 6, and it constitutes sealing mechanism with rotating ring O type circle, makes end face play reliable sealing effect by compressing, thereby makes pump shaft be in good working order.Spring 3 places in the Seal cage of the pump housing 19, and isolates with the flushing cooling water, prevents to stop up and corrosion, guarantees that spring is on-stream not lose efficacy, thereby guarantees that dynamic and static ring remains tight contact condition.Between end face gland 6 and pump shaft 18, establish and adjust ring 5, under mechanical seal device end face and pump shaft off plumb situation, carry out making it vertical from normal moveout correction, and under the complex working condition of and vibration big in the pump shaft swing, can keep the dynamic and static ring sealing face to combine closely, reach good sealing effect.Between stationary ring 13 and gland connecting bolt 15, be provided with the baffle 12 of covering of the fan flow passage structure, it guarantees the rubbing surface of flushing cooling water along covering of the fan uniform flow passage ground flushing cooling dynamic and static ring, and the impurity that has particle in the medium can be washed away, guarantee the dynamic and static ring proper functioning.

In the utility model, on rotating ring 11, also be provided with auxiliary blade, it rotates with pump shaft 18, make and form enough pressure in the Seal cage, in order to the pressure of balance, and stop the medium of pump dispatch to enter Seal cage, guarantee to wash in the Seal cage the clean of cooling water from the pump impeller seal ring, make the flushing cooling water form good circulation simultaneously, guarantee that dynamic and static ring remains good working order.Further, also comprise contiguous block 16 and dead axle screw 17.

The utility model pump shaft sealing device is simple in structure, easy to operate, corrosion-resistant, endurance, mechanical sealing performance are good, long service life, not only can be applicable to the axle envelope place of multiple pump, but also can be used for other rotating shaft sealings, is a kind of novel pump shaft sealing device.

The foregoing description is only enumerated for explanation the utility model, is not to be used to limit the utility model, and the structure of any effects equivalent based on the conversion of the technical program institute all belongs to protection domain of the present utility model.

Claims

1, a kind of pump shaft mechanical seal device, it comprises pump shaft, the pump housing, rotating ring and stationary ring, the end face gland, positioning block, the positioning block screw, driving pin, pump shaft is arranged with rotating shaft O type circle, it becomes to be connected movingly with pump shaft, stationary ring and rotating ring utilize connecting sleeve to be connected on the end face gland, and rotating ring is pressed on the pump shaft end and rotates with pump shaft, stationary ring is installed in end face gland inboard and does not rotate with pump shaft, stop pin is housed on stationary ring, the end face gland is connected to the pump housing by the gland connecting bolt, positioning block is by the positioning block screw, it is characterized in that: described rotating ring exterior edge face is equipped with rotating ring O type circle and is sealed rotating ring, between stationary ring and end face gland, compress sealing by stationary ring O type circle, the Seal cage of the described pump housing is built-in with one and can pressure is provided and makes dynamic and static ring keep the closely spring of contact to dynamic and static ring, between end face gland and pump shaft, be provided with the adjustment ring of automatically calibrating mechanical seal device end face and pump shaft perpendicularity, be provided with the baffle that can make the flushing cooling water evenly wash cooling dynamic and static ring rubbing surface between described stationary ring and the gland connecting bolt, on rotating ring, be provided with and follow the auxiliary blade that pump shaft rotates.

2, pump shaft mechanical seal device according to claim 1 is characterized in that: described baffle is the covering of the fan flow passage structure.