CN206889328U

CN206889328U - A kind of centrifugal pump seal structure

Info

Publication number: CN206889328U
Application number: CN201720843343.3U
Authority: CN
Inventors: 胡振东; 朱小微
Original assignee: Shanghai Glenn Colin (group) Co Ltd
Current assignee: Shanghai Glenn Colin (group) Co Ltd
Priority date: 2017-07-12
Filing date: 2017-07-12
Publication date: 2018-01-16
Anticipated expiration: 2027-07-12

Abstract

It the utility model is related to a kind of centrifugal pump seal structure, centrifugal pump includes the pump housing and impeller, and sealing structure includes import choma, impeller port ring and multiple sealing rings, and import choma is positioned in pump housing male half coupling, impeller port ring is set in impeller neck, is then positioned in the lump in import choma；Import choma inner surface offers a plurality of groove ring, impeller port ring outer surface forms a plurality of bulge loop, groove ring and bulge loop are engaged and form labyrinth seal, and bulge loop forms multiple-sealed structure by import choma and impeller port ring crush seal circle with setting sealing ring in groove ring cavity body.During the impeller rotation of centrifugal pump, the fluid of higher-pressure region, which flows to low-pressure area, to be stopped by similar runcinate labyrinth seal and sealing gasket, reduce leakage rate, improve sealing property and the volumetric efficiency of pump.

Description

A kind of centrifugal pump seal structure

Technical field

It the utility model is related to centrifugal pump field, and in particular to a kind of centrifugal pump seal structure.

Background technology

During the impeller rotation of centrifugal pump, pump housing inner chamber is higher-pressure region, and impeller inlet is low-pressure area, and the fluid of higher-pressure region can be to Low-pressure area flows, and the pump housing and impeller need to set sealing, and normally, the water inlet of centrifugal pump and impeller use the impeller of straight mouth Control ring seal, this sealing means resistance is small, and leakage rate is big, and sealing effectiveness is poor, so as to cause the volumetric efficiency of pump relatively low, wastes The energy.

Utility model content

The purpose of this utility model is to provide a kind of centrifugal pump seal structure, to strengthen its sealing property.

The purpose of this utility model can be realized by following technical proposals：A kind of centrifugal pump seal structure, it is described from Heart pump includes the pump housing and impeller, and the sealing structure includes import choma, impeller port ring and multiple sealing rings, and the pump housing enters The mouth of a river sets male half coupling, and the import choma is positioned in pump housing male half coupling, and the impeller port ring is set in impeller neck, then It is positioned in the lump in import choma；The import choma inner surface is engaged with impeller port ring outer surface, import choma inner surface More sliver transvers sections groove ring in a rectangular trapezoid is offered, impeller port ring outer surface forms the rectangular triangle of more sliver transvers sections Bulge loop, a plurality of bulge loop are respectively implanted in a plurality of groove ring, wherein, every groove ring is divided into right angled triangle part and rectangle Part, the size of bulge loop are adapted with the right angled triangle part of groove ring, bulge loop and the horizontal stroke of the rectangle part composition of groove ring Sealing ring is set in the cavity of rectangular in cross-section.

Compared with prior art, the utility model has the advantage of：Inserted using import choma in pump housing male half coupling, impeller Choma is set in impeller neck, and import choma inner surface opens up a plurality of groove ring, and impeller port ring outer surface forms a plurality of bulge loop, entered The a plurality of bulge loop of a plurality of the groove ring and impeller port ring of mouthful choma is engaged and forms labyrinth seal, and in every groove ring and Sealing ring is provided with the cavity that every bulge loop is formed, is formed by import choma and impeller port ring crush seal circle multiple-sealed Structure, when the impeller of such centrifugal pump rotates, the fluid of higher-pressure region flows to low-pressure area can be by similar runcinate labyrinth seal And the stop of sealing gasket, reduce leakage rate, improve sealing property and the volumetric efficiency of pump.

Brief description of the drawings

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

Fig. 2 is the partial enlarged drawing at A in Fig. 1.

Marked in figure as follows：

1 pump housing, 2 impellers, 3 import chomas, 4 impeller port rings, 5 sealing rings.

Embodiment

Specific embodiment of the present utility model is described in detail below in conjunction with accompanying drawing, becomes apparent from those skilled in the art Ground understands how to put into practice the utility model.Although describing the utility model with reference to its preferred embodiment, these Embodiment simply illustrates, rather than limitation the scope of the utility model.

Referring to Fig. 1 and Fig. 2, a kind of centrifugal pump seal structure, the import of the pump housing 1 and the neck of impeller 2 are installed on.The centrifugal pump Including the pump housing 1 and impeller 2, the sealing structure includes import choma 3, impeller port ring 4 and multiple sealing rings 5, the pump housing 1 Water inlet sets male half coupling, and the import choma 3 is inserted in the male half coupling of the pump housing 1, and the impeller port ring 4 is set in the neck of impeller 2, Then it is positioned in the lump in import choma 3；The inner surface of import choma 3 is engaged with the outer surface of impeller port ring 4, import choma 3 inner surfaces offer more sliver transvers sections groove ring in a rectangular trapezoid, and it is rectangular that the outer surface of impeller port ring 4 forms more sliver transvers sections The bulge loop of triangle, a plurality of bulge loop are respectively implanted in a plurality of groove ring, wherein, every groove ring is divided into right angled triangle portion Point and rectangle part, the size of every bulge loop and the right angled triangle part of bar groove ring be adapted, every bulge loop and every Sealing ring 5 is set in the rectangular cavity in cross section that the rectangle part of groove ring is formed.So a plurality of groove of import choma 3 The a plurality of bulge loop of ring and impeller port ring 4 is engaged and forms labyrinth seal, and formed in every groove ring and every bulge loop Sealing ring 5 is provided with cavity, multiple-sealed structure is formed by import choma 3 and the crush seal circle 5 of impeller port ring 4, so When the impeller 2 of centrifugal pump rotates, the fluid of higher-pressure region flows to low-pressure area can be by similar runcinate labyrinth seal and sealing The stop of pad, reduces leakage rate, improves sealing property and the volumetric efficiency of pump.

In the specific implementation, multiple sealing rings 5 are respectively embedded into the rectangle part of a plurality of groove ring, or will be multiple close Seal 5 is attached respectively to the right-angle side institute of a plurality of bulge loop on the whole.

In the specific implementation, the import choma 3 and the male half coupling of the pump housing 1 are interference fit, impeller port ring 4 and the neck of impeller 2 Portion coordinates for gap, and the inner surface of import choma 3 coordinates with the outer surface of impeller port ring 4 for gap, wherein, impeller port ring 4 and impeller 2 The unilateral gap of neck is 0.15 ~ 0.3mm, preferably 0.19mm.

It should be pointed out that for the utility model through absolutely proving, can also have a variety of conversion and the implementation of remodeling Scheme, it is not limited to the specific embodiment of above-mentioned embodiment.Above-described embodiment as just explanation of the present utility model, and It is not to limitation of the present utility model.In a word, the scope of protection of the utility model should include those for ordinary skill Obviously convert or substitute and retrofit for personnel, and be determined by the appended claims.

Claims

1. a kind of centrifugal pump seal structure, the centrifugal pump includes the pump housing and impeller, it is characterised in that the sealing structure includes Import choma, impeller port ring and multiple sealing rings, the water inlet of the pump housing set male half coupling, and the import choma is positioned over pump In external seam, the impeller port ring is set in impeller neck, is then positioned in the lump in import choma；In the import choma Surface is engaged with impeller port ring outer surface, and import choma inner surface offers more sliver transvers sections groove ring in a rectangular trapezoid, Impeller port ring outer surface forms the bulge loop of the rectangular triangle of more sliver transvers sections, and a plurality of bulge loop is respectively implanted a plurality of groove ring It is interior, wherein, every groove ring is divided into right angled triangle part and rectangle part, the size of bulge loop and the right angled triangle of groove ring Part is adapted, and sealing ring is set in the bulge loop cavity rectangular with the cross section of the rectangle part composition of groove ring.