CN209195729U

CN209195729U - A kind of self-priming gas energy-saving gas-liquid mixed centrifugal pump

Info

Publication number: CN209195729U
Application number: CN201821783281.2U
Authority: CN
Inventors: 刘祥龙; 管焕钦
Original assignee: Guangdong Famous Aviation Environmental Protection Technology Co Ltd
Current assignee: Guangdong Famous Aviation Environmental Protection Technology Co Ltd
Priority date: 2018-10-31
Filing date: 2018-10-31
Publication date: 2019-08-02
Anticipated expiration: 2028-10-31

Abstract

The utility model discloses a kind of self-priming gas energy-saving gas-liquid mixed centrifugal pumps, it includes pedestal, the pump housing, impeller, transmission parts, shaft coupling and motor, the water inlet current limiter being mounted at pump housing water inlet end flanges suction inlet, the space to intake between current limiter and impeller eye form the lnp cache room that vacuum degree is greater than ISO Series Centrifugal pump, the volume of lnp cache device is greater than the volume of ISO Series Centrifugal pump water inlet room, and the pump housing water inlet end is equipped with the air inlet being connected to lnp cache room.The utility model is able to achieve voluntarily air-breathing and is not likely to produce cavitation, and efficiency is higher than the efficiency of peripheral pump by 30%, power and energy saving.

Description

A kind of self-priming gas energy-saving gas-liquid mixed centrifugal pump

Technical field

The utility model category pump technical field is related to ISO Series Centrifugal pump, and in particular to a kind of self-priming gas energy-saving gas-liquid is mixed Close centrifugal pump.

Background technique

In sewage treatment, micro-nano bubble air flotation technology is largely used, what existing micro-nano bubble generated Capital equipment self-priming air pump product is developed on the basis of peripheral pump, and efficiency is 35% hereinafter, peripheral pump has following deficiency Place: energy consumption is high, low efficiency, and the highest pump of efficiency is 39% in peripheral pump performance table；Due to the impeller and the pump housing, pump cover of peripheral pump Between seal clearance very little, but inevitably have minimal amount of silt in sewage treatment and enter in pump chamber, it is very difficult to avoid grinding Damage is easy to cause pump to damage.

The efficiency of ISO50-40-200 centrifugal pump is 67%, higher than above-mentioned peripheral pump by 41.2% or more, the utility model R & D design goes out the centrifugal pump special product of Self inhaling on this basis.

The water inlet of conventional centrifugal pump cannot have gas to leak into, and otherwise will cause cavitation.

The reason of generating cavitation and harm:

Pump in operation, if shown in the K1(Fig. 2 of impeller blade import later) at because gas leak into, pump the exhausted of liquid The pressure for vaporization of liquid can be reduced to pressure, liquid is just begun vaporization at this, generates a large amount of steam, forms bubble.

When the liquid containing a large amount of bubbles forward through the higher-pressure region in impeller when, the highly pressurised liquid around bubble causes bubble It sharp reduces so that rupturing.While bubble is condensed and ruptured, liquid particle is with very high speed filling hole, in this moment Very strong water hammer is generated, and metal surface is hit with very high frequency of impact, impact stress is up to hundreds to thousands Atmospheric pressure, frequency of impact can puncture wall thickness when serious up to tens of thousands of times per second.

For the bearing body of ISO series pump without very reliable bearing, displacement can be generated by pumping to have when overloading, this is a hidden Shape killer.

Utility model content

The purpose of this utility model is to provide a kind of Self inhalings for being exclusively used in micro-nano bubble air-floating sewage treatment system Energy saving gas-liquid mixed centrifugal pump improves cavitation erosion performance and efficiency, to solve shortcoming in the prior art.

The technical solution adopted in the utility model is: a kind of self-priming gas energy-saving gas-liquid mixed centrifugal pump, including pedestal, pump Body, impeller, transmission parts, shaft coupling and motor, the water inlet current limiter being mounted at pump housing water inlet end flanges suction inlet, The space to intake between current limiter and impeller eye forms the lnp cache room that vacuum degree is greater than ISO Series Centrifugal pump, and negative pressure is slow The volume of storage is greater than the volume of ISO Series Centrifugal pump water inlet room, and the pump housing water inlet end is equipped with and is connected to lnp cache room Air inlet.

Further, the pump housing being pumped relative to ISO Series Centrifugal, the area expansion of the pump housing water inlet end suction inlet is twice, Suction passage length doubles, and the volume of lnp cache room is four times of ISO Series Centrifugal pump water inlet room.

Further, relative to ISO Series Centrifugal impeller of pump, the area expansion of the suction eye is twice, front shroud Width between corner and back shroud doubles, and the width of water outlet reduces 30%, expands the area of suction eye, pumps Water inlet flow velocity can reduce by 50% or more, increase the width between front shroud corner and back shroud, improve fluid in impeller Stability reduces the width of water outlet, controls flowing and pressure in impeller more, it is made to flow raising in an orderly manner The stability of fluid in impeller.

Further, the rear bearing cover of the transmission parts is equipped with the integral extended supporting part downwards of processing, supporting part It is fixed on the base by adjusting bolt, self-priming air pump utilizes rear bearing cover, makes to operate three times of rigidity raising or more, eliminates pump Stealthy killer, the noise of pump and vibrate smaller compared with ISO series pump, operate more stable, reliable.

Further, the axis of the transmission parts is sealed using mechanical sealing member.

The utility model compared with prior art, has the advantages that

1, the utility model can increase the water inlet resistance of water inlet, reduce the liquid of impeller by setting water inlet current limiter Inlet flow rate；The lnp cache room that vacuum degree is greater than conventional centrifugal pump, negative pressure are formed between water inlet current limiter and impeller eye The volume of caching room is four times of conventional centrifugal pump upstream chamber, alleviates impeller blade import directly from the slow indoor water inlet of negative pressure and passes 90 degree of sharp turns of system are able to maintain and pump pressure for vaporization of the absolute pressure of liquid higher than liquid, so that liquid is not will form bubble, keep away Exempt from cavitation；Pump housing water inlet end is equipped with the air inlet being connected to lnp cache room, and air enters negative under atmospheric pressure Pressure caching room, realizes self-priming airway dysfunction.

2, the efficiency of the utility model self-priming air pump is higher than the efficiency of peripheral pump by 30%, power and energy saving.

Detailed description of the invention

Fig. 1 is the utility model partial cutaway structural schematic diagram；

Fig. 2 is the structure comparison schematic diagram of the utility model impeller Yu existing impeller.

In figure, 1. pedestals, 2. pump housings, 3. impellers, 4. transmission parts, 5. shaft couplings,

6. motor, 7. water inlet current limiters, 8. lnp cache devices, 9. air inlets, 10. adjust bolt；

41. rear bearing cover, 42. mechanical sealing members；

411. supporting part.

Specific embodiment

The utility model is described in detail with reference to the accompanying drawings and detailed description.

As shown in Figure 1, a kind of self-priming gas energy-saving gas-liquid mixed centrifugal pump of the utility model, including pedestal 1, the pump housing 2, impeller 3, transmission parts 4, shaft coupling 5 and motor 6, the water inlet current limiter 7 being mounted at the water inlet end flanges suction inlet of the pump housing 2, into Space between 3 entrance of water current limiter 7 and impeller forms the lnp cache room 8 that vacuum degree is greater than ISO Series Centrifugal pump, and negative pressure is slow The volume of storage be greater than ISO Series Centrifugal pump water inlet room volume, 2 water inlet end of the pump housing be equipped be connected to lnp cache room 8 into Port 9, the rear bearing cover 41 of transmission parts 4 are equipped with processing integral extended supporting part 411, supporting part 411 downwards and pass through tune Section bolt 10 is fixed on pedestal 1, and the axis of transmission parts 4 is sealed using mechanical sealing member 42.

The utility model pumps the pump housing relative to ISO Series Centrifugal, and the area expansion of pump housing water inlet end suction inlet is twice, sucks Passage length L is doubled, it is established that a lnp cache room, the volume of lnp cache room are ISO Series Centrifugal pump water inlet rooms Four times.

As shown in Fig. 2, the left side is the blade wheel structure schematic diagram of the utility model, D1A ratio D1B area is twice more in figure, Greatly by about one time, water inlet flow velocity is less than 1.2M/S to B1A ratio B1B width, this makes the water inlet velocity ratio of pump reduce 50% compared with conventional pump More than.Arrow indicates that the turning radius of water flow increases nearly 1 times, improves the stability of fluid in impeller.B2A ratio B2B small 30% makes Liquid flowing and pressure in impeller are more controlled, it is made to flow the stability for improving fluid in impeller in an orderly manner. K2 moves H millimeters to center, and what pump generated at K2 during operation is centrifugal force, and pressure is higher than the vaporization pressure of liquid Power will not generate bubble, so cavitation phenomenons will not be generated.

The utility model can be realized voluntarily sucking air in the water inlet end of pump and be not likely to produce cavitation,

When the impeller in water pump makees high speed rotation, the water that is present in impeller while making high speed rotation, makes to be present in leaf Water in wheel generates centrifugal force, into the pump housing after transform into the pressure of water water conveyed toward eminence, impeller eye room loses water After form negative pressure, realize that Self inhaling, gas and liquid become gas-liquid by strong stirring in impeller and the pump housing from air inlet Mixed liquor.

The efficiency of the utility model self-priming air pump is higher than the efficiency of peripheral pump by 30%, power and energy saving.

Above embodiment is specific embodiment of the utility model, be not intended to limit the implementation of the utility model with Interest field, all equivalence changes and modification made according to content described in utility model application scope of patent protection, should all wrap It includes in present utility model application the scope of the patents.

Claims

1. a kind of self-priming gas energy-saving gas-liquid mixed centrifugal pump, including pedestal, the pump housing, impeller, transmission parts, shaft coupling, Yi Ji electricity Motivation, which is characterized in that further include the water inlet current limiter being mounted at pump housing water inlet end flanges suction inlet, intake current limiter and leaf It takes turns the space between entrance and forms the lnp cache room that vacuum degree is greater than ISO Series Centrifugal pump, the volume of lnp cache device is greater than The volume of ISO Series Centrifugal pump water inlet room, the pump housing water inlet end are equipped with the air inlet being connected to lnp cache room.

2. a kind of self-priming gas energy-saving gas-liquid mixed centrifugal pump according to claim 1, which is characterized in that relative to ISO system The area expansion of column centrifugal pump body, the pump housing water inlet end suction inlet is twice, and suction passage length doubles, lnp cache The volume of room is four times of ISO Series Centrifugal pump water inlet room.

3. a kind of self-priming gas energy-saving gas-liquid mixed centrifugal pump according to claim 2, which is characterized in that relative to ISO system The area expansion of column centrifugal pump impeller, the suction eye is twice, and the width between front shroud corner and back shroud increases One times, the width of water outlet reduces 30%.

4. a kind of self-priming gas energy-saving gas-liquid mixed centrifugal pump according to claim 1, which is characterized in that the transmission parts Rear bearing cover be equipped with the integral extended supporting part downwards of processing, supporting part is fixed on the base by adjusting bolt.

5. a kind of self-priming gas energy-saving gas-liquid mixed centrifugal pump according to claim 1, which is characterized in that the transmission parts Axis using mechanical sealing member seal.