CN2247730Y

CN2247730Y - Axial inlet vortex pump

Info

Publication number: CN2247730Y
Application number: CN 96203684
Authority: CN
Inventors: 王乐勤; 朱祖超
Original assignee: Zhejiang University ZJU
Current assignee: Zhejiang University ZJU
Priority date: 1996-02-07
Filing date: 1996-02-07
Publication date: 1997-02-19
Anticipated expiration: 2006-02-07

Abstract

The utility model discloses an axial inlet vortex pump which comprises a bearing stand which support a shaft through a ball bearing, the shaft passes through a mechanical seal press cover and an inner press cover, and the end of the shaft is connected with am impeller; the impeller is arranged in the pump body and provided with a flow conducting block in the front, and the inner press cover is connected with the pump body; the pump body is provided with a pump cover which is connected with the bearing stand; a two-stage mechanical seal is arranged between the shaft and the mechanical seal press cover and the inner press cover; an annular channel, a horizontal axial inlet and a vertical radial outlet are arranged in the flow conducting block. The utility model realizes the axial inlet of mediums and is convenient for the process flow and on-site pipe installation; the adoption of two-stage mechanical seal achieves the best sealing effect.

Description

The axial entrance peripheral pump

The utility model relates to peripheral pump, relates in particular to the axial entrance peripheral pump.

Peripheral pump is owing to the high characteristics of the little lift of its fed sheet of a media flow are widely used in industrial departments such as chemical industry, chemical fertilizer, electric power, food, light industry and pharmacy.But existing peripheral pump but ubiquity following four problems:

1. be the radially structure of outlet that radially enters the mouth, just need to dispose inlet bend pipe and outlet bend pipe when therefore installing at the scene, therefore be not easy to very much technological process and line arrangement;

2. its flow lift characteristic curve is steeper, causes its job applications scope narrow;

3. efficient is lower;

4. cavitation performance is poor, thereby needs the bigger inlet energy of configuration.

The purpose of this utility model provides a kind of axial entrance peripheral pump.

Be illustrated below in conjunction with accompanying drawing.

Fig. 1 is an axial entrance peripheral pump structural representation;

Fig. 2 is an axial entrance peripheral pump baffle structural representation.

The axial entrance peripheral pump comprises bearing bracket stand 11, and by ball bearing 10 back shafts 12, axle one end links to each other with motor 14 through shaft coupling 13, the axle middle part is provided with disc 9, beam warp machine sealed cover 7, internal gland 4, the end links to each other with impeller 3, and impeller places in the pump housing 1, is provided with baffle 2 before the impeller, internal gland links to each other with the pump housing, the pump housing is provided with pump cover 8, and pump cover links to each other with bearing bracket stand, is provided with seal arrangement between axle and internal gland and the machine sealed cover, seal arrangement is the two-shipper envelope, promptly has first mechanical seal 5 and second mechanical seal 6.The ring runner 15 that is provided with in the baffle, horizontal axis inlet 16, vertical diameter is to outlet 17.When lift was 100～200m, the ring runner external diameter was 120～235mm, and the runner flow area is 300～500mm ²

During peripheral pump work, by driven by motor, liquid enters baffle from the pump housing, enter runner and the impeller blade from the liquor inlet of baffle, because the motion of circumferencial direction is all arranged with the interior liquid of runner in the impeller, and generation centrifugal force, the peripheral velocity of liquid is greater than the peripheral velocity of liquid in the runner in the impeller, the centrifugal force that is the liquid in the impeller is bigger, therefore just forms vertical vortex, and liquid relies on vertical vortex to obtain energy, liquid is every just to obtain primary energy through a blade, just obtain multiple energy through a plurality of blades, final liquid enters the pump housing from the liquid outlet of baffle, enters export pipeline from pump housing outlet again.

Structural feature of the present utility model is:

1. be the structure (Fig. 2) of horizontal axis inlet and vertical outlet, the structure (Fig. 2) that the utility model peripheral pump has adopted baffle has realized the medium axial entrance, therefore is convenient to very much technological process and on-the-spot line arrangement.

2. adopt two-stage mechanical seal, reached best sealing effect.

3. first order sealing is adopted from flushing mechanism, promptly draws the sub-fraction medium from pump discharge, passes through filter and cooler in case of necessity, enter Seal cage to the first order sealing cool off and wash.

4. second level sealing is adopted water or other liquid to cool off and is washed, even its effect is exactly that the medium that the first order is sealed with leakage is taken away with flushing liquids such as water.Therefore this novel peripheral pump has best sealing effect, can be used to import very harsh medium of requirement such as media such as liquid gas, liquid hydrocarbon and liquefied ammonia.

5. pump bearing sets up in respect of annular cooling chamber, can introduce the cooling water that temperature is lower than 25 ℃ bearing is cooled off, and has improved the functional reliability of bearing.

6. for adapting to the functional reliability under the high temperature, can introduce cooling medium on pump cover and machine sealed cover cools off pump chamber and Seal cage; Be to adapt to low temperature functional reliability down, can on pump cover and machine sealed cover, introduce thermal medium to pump chamber with the raising operating temperature.

7. vane rings is got rid of in design between machine envelope and oil sealing, even will have the medium and the lubricant oil of the second level Seal cage of water clock to keep apart.

8. adopt bigger Flow area, widened the operating range of peripheral pump.

9. the pump inlet employing is tubaeform, has reduced the axis plane velocity of liquid inflow entrance and the dynamic depression head of impeller, has improved the cavitation performance of peripheral pump.

Axial entrance vortex technical data required for the pump is:

Flow Q=0.5～5.0m ³/ h lift H=100～200m

Efficiency eta=12～24% NPSH=1.5～3.5m

Claims

1. axial entrance peripheral pump, it comprises bearing bracket stand [11], bearing bracket stand is by bearing [10] back shaft [11], beam warp machine sealed cover [7], internal gland [4], its end links to each other with impeller [3], impeller places in the pump housing [1], is provided with baffle [2] before the impeller, and internal gland links to each other with the pump housing, the pump housing is provided with pump cover [8], pump cover links to each other with bearing bracket stand, is provided with seal arrangement between axle and machine sealed cover and the internal gland, it is characterized in that being provided with in the said baffle ring runner [15], horizontal axis inlet [16], vertical diameter is to outlet.

2. a kind of axial entrance peripheral pump according to claim 1 is characterized in that said seal arrangement is the two-shipper envelope, promptly has first mechanical seal [5] and second mechanical seal [6].

3. a kind of axial entrance peripheral pump according to claim 1 and 2 is characterized in that when lift is 100～200m the ring runner external diameter that is provided with in the baffle is 120～235mm, and the runner flow area is 300～500mm ²