CN201053396Y

CN201053396Y - Single-stage single-suction condensation pump

Info

Publication number: CN201053396Y
Application number: CNU200720063678XU
Authority: CN
Inventors: 周寿云
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-06-28
Filing date: 2007-06-28
Publication date: 2008-04-30
Anticipated expiration: 2017-06-28

Abstract

A single stage single suction condenser pump for conveying condensed water or similar medium mainly comprises a pump body 1, a front sealing ring 2, an impeller 3, an impeller nut 5, a back sealing ring 6, a pump cover 8, a shaft housing 9, a bracket 10, a bearing 11, a shaft 12 and a bearing gland bush 13, wherein, the shaft 12 is fixedly arranged on the bracket 10 through the bearing 11 and the bearing gland bush 13; the pump body 1 is connected with the pump cover 8 through bolts and then arranged on the bracket 10; the shaft housing 9 is arranged on the joint of a shaft hole of the pump cover 8 and the shaft 12; the impeller 3 is fixed on a tail end of the shaft 12 through the impeller nut 5; an auxiliary impeller 4 is arranged on the shaft 12 between the impeller 3 and the pump cover 8; vanes direction of the auxiliary impeller 4 is opposite to the vanes direction of the impeller 3; the front sealing ring 2 and the back sealing ring 6 respectively seal between the impeller 3 and the pump body 1 and the pump cover 8; a cavity of the pump cover 8 is communicated with a return pipe 7 arranged in the pump body. The condenser pump with the structure has convenient installation, low fabricating cost and better stability and sealing.

Description

A kind of one step single sucking condensate extractionpump

Technical field

The utility model relates to a kind of centrifugal pump that is used for carrying condensed water or similar mediums, is exactly a kind of one step single sucking condensate extractionpump specifically.

Background technique

The patent No. is that 97234172.2 Chinese patent discloses a kind of single stage single suction cantilever type condensate extractionpump, this condensate extractionpump is by the pump housing, impeller, impeller nut, pump shaft, tail-hood, mechanical seal parts or soft packing seal parts, sprung parts, bearing constitutes, pump shaft is contained in the sprung parts, sprung parts supporting pump shaft and wheel rotation, impeller, impeller nut are fixed on the pump shaft, the pump housing, tail-hood, sprung parts match the back with nut tightly being integral, after leveling sprung parts tail end bearing is steady, pump and base are fixed.This cantilevered condensate extractionpump, poor stability will be regulated height of support during installation, is on the same horizontal plane to guarantee the bearing bottom surface, otherwise very easily damages condensate extractionpump.In addition, the condensate extractionpump of this structure is when operation, and its Seal cage internal pressure is bigger, causes seal leakage easily.

The model utility content

The purpose of this utility model is intended to overcome the deficiency of existing cantilever type condensate extractionpump, a kind of good stability is provided, easy, the less one step single sucking condensate extractionpump of pump housing Seal cage internal pressure are installed.

For reaching above-mentioned purpose, the utility model has adopted following technological scheme: a kind of one step single sucking condensate extractionpump, mainly by the pump housing, preceding seal ring, impeller, impeller nut, increasing back sealing ring, pump cover, axle sleeve, carriage, bearing, axle, bearing gland is formed, axle is packed on the carriage by bearing and bearing gland, the carriage bottom is provided with the screw of several mounted pumps, be contained on the carriage after the pump housing and the pump cover Bolt Connection, the axis hole of pump cover is equipped with axle sleeve with the junction point of axle, impeller is fixed in shaft tail end by impeller nut, sub-propeller be installed between impeller and the pump cover the axle on, the direction blade of sub-propeller and impeller is reverse.Seal with preceding seal ring and increasing back sealing ring respectively between the impeller and the pump housing and the pump cover.

In addition, in technique scheme, the chamber and the pump housing of return pipe UNICOM pump cover can also be set.

In the utility model, adopt integral bracket to replace the bearing of cantilever type condensate extractionpump, the stability of pump is better, the level that need not regulate bearing during installation again, easier for installation, the carriage floor space is littler, thereby can reduce the installation civil engineering costs; Condensate extractionpump is designed to the pump housing and Seal cage pipeline UNICOM, and the liquid of impeller rear pump cover can be recycled to the import of pump by return pipe, has reduced the pressure of sealed chamber, has improved the packing seal performance.In addition, in the utility model, sub-propeller is set, it can be in time throws away the liquid of back shroud of impeller, has reduced Seal cage pressure, and sealing effect is better.

Description of drawings

Fig. 1 is a right elevation of the present utility model;

Fig. 2 is a plan view of the present utility model.

Embodiment

As depicted in figs. 1 and 2, a kind of one step single sucking condensate extractionpump, mainly by the pump housing 1, preceding seal ring 2, impeller 3, impeller nut 5, increasing back sealing ring 6, pump cover 8, axle sleeve 9, carriage 10, bearing 11, axle 12, bearing gland 13 is formed, axle 12 is packed on the carriage 10 by bearing 11 and bearing gland 13, carriage 10 bottoms are provided with the screw of several mounted pumps, by bolt condensate extractionpump is fixed on the mounting base, be fixed on the carriage 10 after the pump housing 1 and pump cover 8 Bolt Connection, the axis hole of pump cover 8 is equipped with axle sleeve 9 with the junction point of axle 12, impeller 3 is fixed in axle 12 tail ends by impeller nut 5, sub-propeller 4 is installed on the axle 12 between impeller 3 and the pump cover 8, and sub-propeller 4 is reverse with the direction blade of impeller 3.Seal with preceding seal ring 2 and increasing back sealing ring 6 respectively between the impeller 3 and the pump housing 1 and the pump cover 8.Owing to adopted sub-propeller 4, it can be immediately throws away the liquid of the sealed chamber between impeller 3 and the pump cover 8, thereby effectively reduce the sealed chamber's pressure between impeller 3 and the pump cover 8, thereupon, the corresponding multiple sealed chamber sealing means that derives: sub-propeller and filler are used and form dynamic seal (packing), sub-propeller is used the no filler of formation with the machine envelope does not have external water-stop.For simplicity, in Fig. 2, demonstrate this two kinds of sealing means, but in actual use, be not in a product, used this dual mode simultaneously.Sub-propeller and filler are used and form dynamic sealing means is that Gland 16 is fixed on filler 17 and packing ring 18 between axle sleeve 9 and the pump cover 8, and sub-propeller and machine envelope are used the no filler of formation not to be had external water tight enclosure and be changed to machine sealed cover 14 and machine is sealed 15 be fixed between axle sleeve 9 and the pump cover 8.In order to reduce the pressure of sealed chamber, between the chamber of pump cover 8 and the pump housing 1, return pipe 7 UNICOMs are set.

Claims

1. one step single sucking condensate extractionpump, mainly by the pump housing (1), preceding seal ring (2), impeller (3), impeller nut (5), increasing back sealing ring (6), pump cover (8), axle sleeve (9), carriage (10), bearing (11), axle (12), bearing gland (13) is formed, it is characterized in that: axle (12) is packed on the carriage (10) by bearing (11) and bearing gland (13), carriage (10) bottom is provided with the screw of several mounted pumps, be contained on the carriage (10) after the pump housing (1) and pump cover (8) Bolt Connection, the axis hole of pump cover (8) is equipped with axle sleeve (9) with the junction point of axle (12), impeller (3) is fixed in axle (12) tail end by impeller nut (5), sub-propeller (4) is installed on the axle (12) between impeller (3) and the pump cover (8), sub-propeller (4) is reverse with the direction blade of impeller (3), uses the sealing of preceding seal ring (2) and increasing back sealing ring (6) between the impeller (3) and the pump housing (1) and the pump cover (8) respectively.

2. a kind of one step single sucking condensate extractionpump according to claim 1 is characterized in that: between the chamber of pump cover (8) and the pump housing (1) return pipe (7) UNICOM is set.

3. a kind of one step single sucking condensate extractionpump according to claim 1 and 2 is characterized in that: be provided with mechanical seal device between the axis hole of pump cover (8) and the axle sleeve (9), machine sealed cover (14) is fixed on machine envelope (15) between axle sleeve (9) and the pump cover (8).

4. a kind of one step single sucking condensate extractionpump according to claim 1 and 2, it is characterized in that: be provided with stuffing seal between the axis hole of pump cover (8) and the axle sleeve (9), Gland (16) is fixed on filler (17) and packing ring (18) between axle sleeve (9) and the pump cover (8).