CN206860542U - Double suction spiral flow constant-pressure pump - Google Patents

Abstract

It the utility model is related to pump technical field, disclose a kind of double suction spiral flow constant-pressure pump, including front pump shell, rear pump shell, pump shaft and impeller, front pump shell is connected to form spiral pump chamber with rear pump shell, spiral pump chamber includes preceding suction chamber, pumping chamber and rear suction chamber, preceding suction chamber is provided with the advance mouth of a river, and rear suction chamber is provided with rear water inlet, and pumping chamber is provided with delivery port；Impeller is installed in spiral pump chamber by pump shaft, and impeller includes that there is the wheel disc of wheel hub and the multiple front vanes and rear blade positioned at wheel disc leading flank and trailing flank, adjacent front vane and adjacent rear blade to construct impeller channel respectively；Front vane is identical with the quantity of rear blade.The advance mouth of a river and rear water inlet are set, increase the flow of pump, front vane is identical with rear blade quantity, avoids impeller from being axially moveable, and reduces vibration, improves efficiency.

Description

Double suction spiral flow constant-pressure pump

Technical field

Water pump technology is the utility model is related to, more particularly to a kind of double suction spiral flow constant-pressure pump.

Background technology

The pump that some existing fire-fightings, Industrial Engineering, agriculture project use has for pressure of increasing export, raising lift Pump design multistage centrifugal combining structure multistage centrifugal sundstrand pump, multistage centrifugal sundstrand pump exist is unable to balancing axial thrust and footpath Xiang Li, it is big to shake big noise, big to machine's sealing, the shortcomings that poor sealing performance, easy leak, easy pressure release；Some pump designs There is the variable-frequency control pump of RHVC or gear speedup case and improve pressure to increase rotating speed, there is pressure for variable-frequency control pump It is unstable, the shortcomings that volume is big, and fault rate is high.

China Patent Publication No. CN101294580A discloses a kind of spiral flow constant-pressure pump, the spiral flow constant-pressure pump relative to Multistage centrifugal combines and variable-frequency control pump, has the advantages of flow is larger and lift is higher.But with technology growth requirement, it is existing The flow for having the spiral flow constant-pressure pump of technology is difficult to reach nuclear industry, the requirement of high building fire fighting, and efficiency is relatively low.Especially It is the quickening with Urbanization in China, building is more and more intensive, more and more taller and bigger, and scene of a fire situation becomes increasingly complex, and High building fire-proof technology does not catch up with the speed of high building rising much.

Utility model content

(1) technical problems to be solved

The purpose of this utility model is to provide the double suction spiral flow constant pressure that a kind of outlet pressure for increasing constant pressure pump has flow Pump.

(2) technical scheme

In order to solve the above-mentioned technical problem, the utility model provides a kind of double suction spiral flow constant-pressure pump, including front pump shell, after Pump case, pump shaft and impeller, the front pump shell are connected to form spiral pump chamber with the rear pump shell, and the spiral pump chamber includes preceding absorb water Room, pumping chamber and rear suction chamber, the preceding suction chamber are provided with the advance mouth of a river, and the rear suction chamber is provided with rear water inlet, the pressure Hydroecium is provided with delivery port；The impeller is installed in the spiral pump chamber by the pump shaft, and the impeller includes having wheel hub Wheel disc and the multiple front vanes and rear blade positioned at the wheel disc leading flank and trailing flank, the adjacent front vane and adjacent institute State rear blade and construct impeller channel respectively；The front vane is identical with the quantity of rear blade.

Wherein, each front vane and the rear blade include main lobe section and bending section respectively, the main lobe section edge with The direction that the rotation direction of impeller is opposite tilts extension and forms the first angle, the bending section with the radial direction of the wheel hub Along and the impeller rotation direction identical direction tilt extension and with main lobe section formed the second angle, the bending section meet to The one side of fluid has canted coil inclined-plane, and the canted coil inclined-plane is from close to the main lobe section to the close wheel plate edge Gradually tilted from the one side met to fluid to the face canted coil backwards to fluid.

Wherein, the bending section inclines close to the end face of the wheel plate edge from top to bottom to away from the wheel disc direction Tiltedly, end slope angle is formed.

Wherein, the angle at the end slope angle is 1~2.5 °.

Wherein, first angle is 20~45 °, and second angle is 20~45 °.

Wherein, the surface roughness of the spiral pump chamber and the impeller channel is less than 12.5 μm.

Wherein, the delivery port is configured with taper anemostat.

Wherein, the taper anemostat includes first half anemostat and later half anemostat, and the first half anemostat is located at described Front pump shell, the later half anemostat are located at the rear pump shell.

Wherein, the unilateral angle of flare of the taper diffusion tubular construction is 6~8 °.

(3) beneficial effect

Double suction spiral flow constant-pressure pump provided by the utility model, including front pump shell, rear pump shell, pump shaft and impeller, front pump shell It is connected to form spiral pump chamber with rear pump shell, spiral pump chamber includes preceding suction chamber, pumping chamber and rear suction chamber, before preceding suction chamber is provided with Water inlet, rear suction chamber are provided with rear water inlet, and pumping chamber is provided with delivery port；Impeller is installed in spiral pump chamber by pump shaft, leaf Wheel include with wheel hub wheel disc and the multiple front vanes and rear blade positioned at wheel disc leading flank and trailing flank, adjacent front vane and Adjacent rear blade constructs impeller channel respectively；Front vane is identical with the quantity of rear blade.The advance mouth of a river and rear water inlet are set, The flow of pump is increased, front vane is identical with rear blade quantity, avoids impeller from being axially moveable, and reduces vibration, improves efficiency.

Brief description of the drawings

Fig. 1 is the sectional view of one embodiment of the double suction spiral flow constant-pressure pump of the utility model embodiment；

Fig. 2 is the front view of the impeller of the double suction spiral flow constant-pressure pump of the utility model embodiment；

Fig. 3 is the rearview of the front pump shell of the double suction spiral flow constant-pressure pump of the utility model embodiment.

In figure, 100：Pump case；200：Impeller；210：Front vane；211：Main lobe section；212：Bending section；220：Rear blade； 230：Wheel disc；240：Wheel hub；300：Rear pump shell；400：Pump shaft；410：Bearing；420：Shaft coupling；500：Spiral pump chamber；510：Before Suction chamber； 520：Pumping chamber；530：Suction chamber afterwards.

Embodiment

With reference to the accompanying drawings and examples, specific embodiment of the present utility model is described in further detail.Below Example is used to illustrate the utility model, but is not limited to the scope of the utility model.

, it is necessary to which explanation, unless otherwise clearly defined and limited, term " are pacified in description of the present utility model Dress ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integratedly Connection；Can be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected by intermediary, It can be the connection of two element internals.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition Concrete meaning of the language in the utility model.

Embodiment 1

As shown in Figures 1 to 3, double suction spiral flow constant-pressure pump of the present utility model includes front pump shell 100, impeller 200, rear pump Shell 300 and pump shaft 400.

Front pump shell 100 is connected to form spiral pump chamber 500 with rear pump shell 300, and the spiral pump chamber 500 includes preceding suction chamber 510th, pumping chamber 520 and rear suction chamber 530, the preceding suction chamber 510 is provided with the advance mouth of a river, after the rear suction chamber 530 is provided with Water inlet, the pumping chamber 520 are provided with delivery port.The impeller 200 is installed on the spiral pump chamber by the pump shaft 400 In 500, pump shaft 400 is pivotally mounted to front pump shell 100 and rear pump shell 300 by bearing 410, and passes through spiral pump chamber 500, pump One end that axle 400 stretches out front pump shell 100 is provided with shaft coupling 420, is used for and motor connection.The impeller 200 includes having wheel hub 240 wheel disc 230 and the multiple front vanes 210 and multiple rear blades 220 positioned at the leading flank of wheel disc 230 and trailing flank, phase The adjacent front vane 210 and the adjacent rear blade 220 construct impeller channel respectively；The front vane 210 and rear blade 220 Quantity it is identical.

Front vane 210 extends from wheel hub 240 to the edge of wheel disc 230, and rear blade 220 is from wheel hub 240 to the side of wheel disc 230 Edge extends.The quantity of front vane 210 and rear blade 220 is 6~16, and blade 210 and rear blade 220 are along the center ring of wheel disc 230 Shape arranges.Such as 6,8,12 and 16 can be used, blade 210 is identical with the quantity of rear blade 220.

The utility model increases the flow of pump, front vane and rear blade quantity by setting the advance mouth of a river and rear water inlet It is identical, avoid impeller from being axially moveable, reduce vibration, improve efficiency.

Each front vane 210 and rear blade 220 include main lobe section 211 and bending section 212, wherein, main lobe section 211 is close to wheel Hub 240, section 212 is sold off close to the edge of wheel disc 230, main lobe section 211 extends from wheel hub 240 to the edge direction of wheel disc 230, bending Section 212 is connected to the end of main lobe section 211.Main lobe section 211 along the direction opposite with the rotation direction of impeller 200 tilt extension and The first angle is formed with the radial direction of wheel hub 240, bending section 212 tilts along with the rotation direction identical direction of impeller 200 Extend and form the second angle with main lobe section 211, the bending section 212, which is met to the one side of fluid, has canted coil inclined-plane, institute State canted coil inclined-plane from close to the main lobe section 211 to close to the edge of wheel disc 230 gradually from meet to fluid one towards Distort and tilt backwards to the one side of fluid.Due to impeller 200 wheel disc 230 rotate when, if from leading flank be seen as clockwise, from Trailing flank is seen as counterclockwise, i.e., front vane 210 and rear blade 220 are being met to the one side of fluid on the contrary, therefore, front vane 210 First angle of the first angle, the second angle and canted coil inclined-plane and rear blade 220, the second angle and canted coil inclined-plane In the opposite direction.

Bending section 212 is met into the advantages of being arranged to canted coil inclined-plane to the one side of fluid is fluid from close to wheel hub Larger pressure differential is produced during the outside flowing of 240 interior laterally closer wheel plate edge, and fluid produces stronger spiral flow, energy Enough improve the pressure of double suction spiral flow constant-pressure pump, improve lift and efficiency, reach constant pressure, and it is more preferable with cavitation performance Advantage.It should be noted that canted coil inclined-plane can be tilted only in a face canted coil of bending section towards fluid, can also It is that whole bending section canted coil tilts.What the utility model defined meet to the one side of fluid refer to wheel rotation when, front vane And rear blade is towards the one side of the forward side in wheel rotation direction.

Double suction spiral flow constant-pressure pump provided by the utility model, main lobe section form the first angle, folding with wheel hub radial direction Curved segment and main lobe section form the second angle, and set to meet to the one side of fluid in bending section and set canted coil inclined-plane, can the The effect of one angle, the second angle and canted coil face, fluid is produced the spiral flow more stronger than prior art, increase constant pressure The outlet pressure of pump, improve lift and efficiency.

Further, bending section 212 close to the end face at the edge of wheel disc 230 from top to bottom to away from the wheel disc 230 directions tilt, and form end slope angle.The angle at end slope angle is 1~2.5 °, preferably 1.5 °.

Preferably, the first angle is 20~45 °, preferably 30 °, and the second angle is 20~45 °, preferably 30 °.It is preferred that , the surface roughness of spiral pump chamber is less than 12.5 μm, reduces the flowage friction loss of fluid, improves efficiency.

Further, delivery port is configured with taper anemostat.The unilateral angle of flare of taper diffusion tubular construction for 6~ 8 °, divergence loss is reduced, improves efficiency.

Further, taper anemostat includes first half anemostat and later half anemostat, and the first half anemostat is located at described Front pump shell, the later half anemostat are located at the rear pump shell.Taper anemostat is divided into two parts in casting, and a part is in front pump Shell is cast, and a part is combined to form anemostat in rear pump shell casting, assembling.

Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model Within the spirit and principle of utility model, any modification, equivalent substitution and improvements made etc., the utility model should be included in Protection domain within.

Claims (9)

1. A kind of 1. double suction spiral flow constant-pressure pump, it is characterised in that：Including front pump shell, rear pump shell, pump shaft and impeller, the front pump shell It is connected to form spiral pump chamber with the rear pump shell, the spiral pump chamber includes preceding suction chamber, pumping chamber and rear suction chamber, before described Suction chamber is provided with the advance mouth of a river, and the rear suction chamber is provided with rear water inlet, and the pumping chamber is provided with delivery port；The impeller passes through The pump shaft is installed in the spiral pump chamber, the impeller include wheel disc with wheel hub and positioned at the wheel disc leading flank and The multiple front vanes and rear blade of trailing flank, the adjacent front vane and the adjacent rear blade construct impeller channel respectively； The front vane is identical with the quantity of rear blade.
2. 2. double suction spiral flow constant-pressure pump as claimed in claim 1, it is characterised in that：Each front vane and the rear blade Include main lobe section and bending section respectively, the main lobe section along the direction opposite with the rotation direction of impeller tilt extension and with it is described The radial direction of wheel hub forms the first angle, and the bending section tilts extension along with the rotation direction identical direction of the impeller And the second angle is formed with main lobe section, the bending section, which is met to the one side of fluid, has canted coil inclined-plane, the canted coil Plate edge is taken turns gradually from meeting to fluid when the while torsion to fluid backwards to close to described from close to the main lobe section in inclined-plane Bent spiral inclination.
3. 3. double suction spiral flow constant-pressure pump as claimed in claim 2, it is characterised in that：The bending section is close to the wheel plate edge End face tilted from top to bottom to away from the wheel disc direction, form end slope angle.
4. 4. double suction spiral flow constant-pressure pump as claimed in claim 3, it is characterised in that：The angle at the end slope angle be 1~ 2.5°。
5. 5. double suction spiral flow constant-pressure pump as claimed in claim 2, it is characterised in that：First angle is 20~45 °, described Second angle is 20~45 °.
6. 6. double suction spiral flow constant-pressure pump as claimed in claim 1, it is characterised in that：The spiral pump chamber and the impeller channel Surface roughness be less than 12.5 μm.
7. 7. double suction spiral flow constant-pressure pump as claimed in claim 1, it is characterised in that：The delivery port is configured with taper diffusion Pipe.
8. 8. double suction spiral flow constant-pressure pump as claimed in claim 7, it is characterised in that：The taper anemostat spreads including first half Pipe and later half anemostat, the first half anemostat are located at the front pump shell, and the later half anemostat is located at the rear pump shell.
9. 9. double suction spiral flow constant-pressure pump as claimed in claim 7, it is characterised in that：The unilateral expansion of the taper diffusion tubular construction It is 6~8 ° to dissipate angle.