CN2551790Y

CN2551790Y - Combined sealer for sand digging pump

Info

Publication number: CN2551790Y
Application number: CN 02218056
Authority: CN
Inventors: 胡滨; 骆建国
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-06-08
Filing date: 2002-06-08
Publication date: 2003-05-21
Anticipated expiration: 2012-06-08

Abstract

The utility model relates to a combined sealing element of a sand digging pump, which belongs to the field of mechanical sealing elements. The utility model is an improved solution suggested by aiming to the short service life and the troubled change of sealing elements of the present river sand digging pump. The solution has the essential point that a packing sealing component and a mechanical sealing component are sheathed on a shaft sleeve. The two end surfaces of the shaft sleeve are provided with an O-shaped ring. A plurality of attachment screws and check screws are arranged in the axial direction of a material filling cavity. A pump cavity is provided with a high pressure flushing hole communicated with the shaft sleeve. The shaft sleeve is provided with a gasket and a stationary ring. The utility model uses the device with mechanical seal, high pressure flushing and packing seal compensation to solve the difficult problem of the dredging field. The combined sealing element of a sand digging pump makes the structural design reasonable and is convenient to install. The integrative sealing property is in good condition and the service life of the dredge pump is enhanced. The utility model adapts to the matching with the large-scale sand digging pump and is suitable for the matching of other pumps for turbidity fluid.

Description

The sand digging pump combination seal

Affiliated technical field

The utility model relates to the mechanical sealing element field, is a kind of sand digging pump combination seal.

Background technique

Because Yellow River mud deposits in a large number, country drops into a large amount of human and material resources and carries out training of river channel.At present, the sand digging pump of one of capital equipment of dredging is inhaled husky, because sandy concentration height, than great, condense in easily and causes damage of components in the equipment.So, not reaching designing requirement working life, this is not only the difficult problem in domestic dredging field, and is a difficult problem in international dredging field.

Summary of the invention

The utility model will be on the basis of mechanical seal at the problems referred to above, and with a kind of combination seal substituting, i.e. the difficult problem in the device solves dredging field of blow wash, packing seal compensation is increased in mechanical seal.And make its structural design comparatively reasonable, be convenient to install, comprehensive sealing is functional, improves the working life of dredging pump.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

Now in conjunction with the accompanying drawings, its feature is described as follows: the sand digging pump combination seal, mainly formed by packing seal assembly and mechanical sealing assembly, promptly form the packing seal assembly by Gland 2, packing cavity 3, packing seal 5; Form mechanical sealing assembly by sealing gasket 6, stationary ring 7, O shape circle 8, spring 9, throw-out collar 10, O shape circle 11, driving pin 12, rotating ring 13, stationary ring pressing plate 14; It is characterized in that packing seal assembly and mechanical sealing assembly all are set on the axle sleeve 15, both ends of the surface at axle sleeve all are equipped with O shape circle 1, be axially arranged with several attachment screws 18 and housing screw 17 at packing cavity 3, on pump chamber 19, be provided with high pressure washing hole 16, the high pressure washing hole is connected with axle sleeve, is lined with O shape circle 4 between pump chamber and the packing cavity.Axle sleeve 15 is provided with sealing gasket 6, stationary ring 7, O shape circle 8, spring 9, throw-out collar 10, O shape circle 11, driving pin 12, rotating ring 13, stationary ring pressing plate 14.The high pressure water that mechanical sealing assembly and high pressure washing hole are inserted is to guarantee that mechanical seal moves in the river washing solution of cleaning relatively, and mechanical seal is to be finished by the driving pin 12 of locating on the axle sleeve 15 with axial concentricity.By the swing compensation of spring 9 and the self-alignment of driving pin, rotating ring 13 is realized mechanical seal with stationary ring 7 even break-ins in the running.

Embodiment

After the utility model assembling, axle sleeve is to be set on the pump shaft of sand digging pump, and former and later two end faces are connected with adjacent part by O shape circle 1, by attachment screw 18 connections, O shape is enclosed be in sealing state.During sand digging pump work, spring 9 avoids silt to enter by 8 protections of O shape circle, makes spring failure.Rotating ring adopts the pin transmission, has improved the degrees of freedom of installing.Because have the high pressure washing hole on the pump chamber, the pressure of sparge water makes silt can not enter Sealing in a large number greater than the pressure of silt in the pump.The packing seal assembly mainly is to use when mechanical seal leakage, so before the mechanical seal normally, housing screw 17 is releasing orientation, has avoided the gland sealed dry friction with this.In case during mechanical seal leakage, then must tighten housing screw, and needn't frequently change mechanical sealing element.It is supporting that the combination seal of this structure can be adapted to large-scale sand digging pump, can also be applied to other pump that mixes the erosion fluid with supporting, and certain application value is arranged.

Claims

1, sand digging pump combination seal is mainly formed by the packing seal assembly with mechanical sealing assembly, promptly forms the packing seal assembly by Gland (2), packing cavity (3), packing seal (5); Form mechanical sealing assembly by sealing gasket (6), stationary ring (7), O shape circle (8), spring (9), throw-out collar (10), O shape circle (11), driving pin (12), rotating ring (13), stationary ring pressing plate (14); It is characterized in that packing seal assembly and mechanical sealing assembly all are set on the axle sleeve (15), both ends of the surface at axle sleeve all are equipped with O shape circle (1), be axially arranged with several attachment screws (18) and housing screw (17) at packing cavity (3), on pump chamber (19), be provided with high pressure washing hole (16), the high pressure washing hole is connected with axle sleeve, is lined with O shape circle (4) between pump chamber and the packing cavity; Axle sleeve (15) is provided with sealing gasket (6), stationary ring (7), O shape circle (8), spring (9), throw-out collar (10), O shape circle (11), driving pin (12), rotating ring (13), stationary ring pressing plate (14).