CN201209585Y

CN201209585Y - Sealing arrangement for pump

Info

Publication number: CN201209585Y
Application number: CNU2008201199065U
Authority: CN
Inventors: 张国林
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-06-03
Filing date: 2008-06-03
Publication date: 2009-03-18
Anticipated expiration: 2018-06-03

Abstract

The utility model relates to a sealing device for a pump. An impeller (3) and a shaft sleeve (6) which are arranged in a pump body (1) are sleeved on a pump shaft (8) through a key (7); the impeller and the shaft sleeve are tightly locked on the pump shaft by impeller nuts (2); a gland (5) is arranged on the pump cover; tightening sealing faces between the impeller and the impeller nut, between the impeller and the shaft sleeve and between the pump cover and the gland are all stepped end faces, and the convex faces of the tightening sealing faces are tightening stressed faces and the concave faces are sealing faces on which sealing rings are arranged to separate the sealing faces from the stressed faces and avoid the influence on the sealing effect due to direct stress. The anticipated tightening effect is achieved through the stressed faces to prevent the impeller nuts from dropping off. The sealing device realizes the total sealing of the tightening sealing faces between the impeller and the impeller nut, between the impeller and the shaft sleeve and between the pump cover and the gland, roots out the liquid leakage, improves the sealing performance of the pump body, and prolongs the service life of the pump.

Description

A kind of Sealing used for pump

Technical field

The utility model relates to a kind of Sealing used for pump, is applicable to the static seal device and the supporting dynamic seal apparatus of chemical pump, pollution discharge pump.

Background technique

The seal approach between movement parts and Sealing lip is generally adopted in the sealing of existing chemical pump or pollution discharge pump, and has ignored the sealing of pump housing inner piece fitting surface.The mutual fit sealing face of the impeller of existing pump housing inside and impeller nut, impeller and axle sleeve, pump cover and gland is the plane fit sealing.Impeller directly lock onto on the pump shaft by impeller nut, or directly set up planar seal ring at impeller and the fastening stressed place of impeller nut, the fastening stressed place of impeller and axle sleeve and pump cover and gland adopts directly mode fastening or that set up planar seal ring at fastening place, and sealing surface and stress surface are same working surface.Wherein, a kind of direct fastening means, because of the precision of fit sealing face exists deviation to influence sealability, it is unreliable to seal, and easily produces chemical liquid and sewage and leaks, and causes the corrosion of other parts, shortens the working life of pump.Another kind is set up the fastening means of planar seal ring, as when the fastening impeller nut of fit sealing face, if fastening force is excessive, easily causes the damage of planar seal ring, and loses its seal action; If when fastening force was too small, impeller nut did not have fastening effect, easily loose or dislocation causes the damage of pump, reduces the working life of pump.

Summary of the invention

In order to overcome in the prior art direct fastening means and to set up the shortcoming that the fastening means of planar seal ring exists, the purpose of this utility model provides a kind of Sealing used for pump that does not have leakage, good seal performance, long service life.

The technical solution adopted in the utility model is: a kind of Sealing used for pump, the impeller nut of pump shaft axle head lock onto impeller, axle sleeve on the pump shaft, pump cover is installed in the pump housing, gland is installed on the pump cover, and the fit sealing face between described impeller and impeller nut, impeller and axle sleeve, pump cover and the gland is step end face, and its convex surface is a stress surface, concave surface is a sealing surface, seal ring is installed on the sealing surface, thereby reaches separating of all fastening stress surfaces and sealing surface, realize hermetically sealed.

Further, step end face is located on the impeller fit sealing face or on the impeller nut fit sealing face, on the impeller fit sealing face or on the axle sleeve fit sealing face, on the pump cover fit sealing face or on the gland fit sealing face.

The sectional shape of described seal ring is circular oval or square.

This seal arrangement is that seal ring is installed on the sealing surface of fit sealing face, makes the sealing surface of two parts separate with stress surface, avoids directly stressed influence to sealing effect.When secure component, because the compressive deformation of seal ring, distortion place contacts with the seal face perfect elasticity, has realized the end face seal of seal ring contacting point; Along with the increasing of fastening force, stress surface reaches the fastening effect of expection, has prevented that impeller nut from coming off.

The sealing device is reasonable in design, simple in structure, it is hermetically sealed that the fit sealing face of impeller and impeller nut, impeller and axle sleeve, pump cover and gland has been realized, the leakage of having stopped liquid, improve the sealability of pump housing inside, guaranteed the long-term stability running of equipment.

Description of drawings

Fig. 1 is the pump structure schematic representation that is provided with seal arrangement;

Fig. 2 is the local enlarged diagram in A place of Fig. 1;

Fig. 3 is the local enlarged diagram in B place of Fig. 1;

Fig. 4 is the local enlarged diagram in C place of Fig. 1.

Embodiment

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

A kind of Sealing used for pump as shown in Figure 1, comprise the pump housing 1, impeller 3, impeller nut 2, axle sleeve 6, pump shaft 8, key 7, pump cover 4, gland 5, impeller 3 in the pump housing 1, axle sleeve 6 is set on the pump shaft 8 by key 7, and the impeller nut 2 that passes through the pump shaft axle head is with impeller, axle sleeve lock onto on the pump shaft, on pump cover 4 installations and the pump housing 1, gland 5 is installed on the pump cover 4, wherein impeller 3 and impeller nut 2, impeller 3 and axle sleeve 6, fit sealing face between pump cover 4 and the gland 5 is step end face, its convex surface is a stress surface, concave surface is a sealing surface, and seal ring is installed on the sealing surface.Step end face is arranged on the impeller fit sealing face or on the impeller nut fit sealing face, on the impeller fit sealing face or on the axle sleeve fit sealing face, on the pump cover fit sealing face or on the gland fit sealing face.

Among Fig. 2, the stressed place of fit sealing of impeller 3 and impeller nut 2, fastening stressed as stress surface 11a and impeller 3 by the impeller nut step end face, the concave surface sealing surface 10a of impeller nut goes up suit seal ring 9a; Perhaps fastening stressed as stress surface and impeller nut by impeller 3 step end faces, suit seal ring on the concave surface sealing surface of impeller, seal ring is the acid-fast alkali-proof elastic material, seals tightly, makes impeller nut and the stressed place of impeller fit sealing reach fully the effect of sealing.

Among Fig. 3, the stressed place of fit sealing of impeller 3 and axle sleeve 6, fastening stressed as stress surface 11b and impeller 3 by the axle sleeve step end face, the concave surface sealing surface 10b of axle sleeve goes up suit seal ring 9b; Perhaps fastening stressed as stress surface and axle sleeve by impeller 3 step end faces, suit seal ring on the concave surface sealing surface of impeller seals tightly, makes impeller and the stressed place of axle sleeve fit sealing reach fully the effect that seals.

Among Fig. 4, the stressed place of fit sealing of pump cover 4 and gland 5, fastening stressed as stress surface 11c and gland 5 by the step end face of pump cover, the concave surface sealing surface 10c of pump cover goes up suit seal ring 9c; Perhaps fastening stressed as stress surface and pump cover by the step end face of gland, suit seal ring on the concave surface sealing surface of gland makes pump cover and the stressed place of gland fit sealing reach the effect of sealing fully.

Other unlisted fit sealing faces all adopt convex fit sealing face of the present utility model in the pump housing, also in protection domain of the present utility model.

Claims

1, a kind of Sealing used for pump, impeller (3), axle sleeve (6) in the pump housing (1) are set on the pump shaft (8) by key (7), the impeller nut of pump shaft axle head (2) lock onto impeller, axle sleeve on the pump shaft, pump cover (4) is installed in the pump housing, gland (5) is installed on the pump cover, it is characterized in that: the fit sealing face between described impeller and impeller nut, impeller and axle sleeve, pump cover and the gland is step end face, its convex surface is fastening stress surface, concave surface is a sealing surface, seal ring is installed on the sealing surface, fastening stress surface is separated with sealing surface.

2, a kind of Sealing used for pump according to claim 1 is characterized in that: step end face is arranged on the impeller fit sealing face or on the impeller nut fit sealing face, on the impeller fit sealing face or on the axle sleeve fit sealing face, on the pump cover fit sealing face or on the gland fit sealing face.

3, a kind of Sealing used for pump according to claim 1 is characterized in that: the sectional shape of seal ring is for circular oval or square.