CN206054313U - Double volute flow guiding machine configuration centrifugal multistage pump multiple centrifugal pumps - Google Patents

Abstract

The utility model discloses double volute flow guiding machine configuration centrifugal multistage pump multiple centrifugal pumps, are related to centrifugal multistage pump multiple centrifugal pump field, and in particular to a kind of double volute deflectors of centrifugal multistage pump multiple centrifugal pump.Including the pump housing；Pump housing medial axis position is horizontally installed with pump shaft；Pump housing centre position is double volute stage casings, and double volute stage casings section is ellipsoidal structure；At least both stage impellers are installed in double volute stage casings, impeller is installed on pump shaft, enclosing per one-level impeller outer has volute chamber, volute chamber is two at a distance of 180 ° of symmetrical screw type diversion cavity；The left front side external surface in double volute stage casings has inlet segment, and double volute stage casings outside surface thereof has water exit end；Pump shaft or so two ends are passed from double volute stage casings inner chamber, and pump housing left end is provided with gland, and pump housing right-hand member is provided with stuffing box body, pump shaft or so two ends and is separately installed with a parts of bearings.This utility model solves existing centrifugal multistage pump multiple centrifugal pump due to the effect of radial force, and pump often occurs the problem of noise and vibration in the running.

Description

Double volute flow guiding machine configuration centrifugal multistage pump multiple centrifugal pumps

Technical field

This utility model is related to centrifugal multistage pump multiple centrifugal pump field, and in particular to a kind of double volute deflectors of centrifugal multistage pump multiple centrifugal pump.

Background technology

Centrifugal multistage pump multiple centrifugal pump is that the plural pump with said function gathers together, on fluid channel structure, table Now the medium pressure relief opening of the first order is communicated with the import of the second level, the medium pressure relief opening of the second level and the import phase of the third level Logical, the mechanism of so series connection defines centrifugal multistage pump multiple centrifugal pump.The meaning of centrifugal multistage pump multiple centrifugal pump is to improve setting pressure.It is generally multistage from Heart pump structure is using single scroll casing shape pump housing（Stage casing）, there is corresponding volute casing the periphery of each impeller, stator portion is inlayed in volute casing Part.When the impeller in motor moving axis rotates at a high speed, liquid in impeller is filled under the influence of centrifugal force, from impeller The heart gets rid of the surrounding to impeller along interlobate runner, as liquid is acted on by blade, makes pressure and speed while increasing, The impeller of time one-level is drawn towards through the runner of stator, by above-mentioned principle, all of impeller and stator is successively flow through, is entered One step increases the pressure energy of liquid.After each impeller is superimposed step by step, certain lift is just obtained, underground liquid is lifted To ground.But this structure is due to the effect of radial force, pump is made often to occur the phenomenon of noise and vibration in the running.

Utility model content

This utility model provides a kind of pair of volute flow guiding machine configuration centrifugal multistage pump multiple centrifugal pump, and this utility model solves existing many Due to the effect of radial force, often there is the problem of noise and vibration to level centrifugal pump in the running in pump.

To solve the above problems, this utility model is adopted the following technical scheme that：Double volute flow guiding machine configuration centrifugal multistage pump multiple centrifugal pumps, Including the pump housing；Pump housing medial axis position is horizontally installed with pump shaft；Pump housing centre position is double volute stage casings, and double volute stage casings are cut Face is ellipsoidal structure；At least both stage impellers are installed in double volute stage casings, impeller is installed on pump shaft, enclose per one-level impeller outer There is volute chamber, volute chamber is two at a distance of 180 ° of symmetrical screw type diversion cavity；The left front side external surface in double volute stage casings have into Water section, inlet segment are communicated with the volute chamber of first order impeller periphery；Double volute stage casings outside surface thereof has water exit end, water exit end and end The volute chamber of one stage impeller periphery is communicated；Pump shaft or so two ends are passed from double volute stage casings inner chamber, and pump housing left end is provided with filler pressure Lid, pump housing right-hand member are provided with stuffing box body, pump shaft or so two ends and are separately installed with a parts of bearings.

Of the present utility model pair of volute stage casing section is ellipsoidal structure, the small in volume of pump；It is of the present utility model Centrifugal multistage pump multiple centrifugal pump employs two at a distance of 180 ° of symmetrical screw type deflectors, and the arrow from Fig. 2 finds out liquid flow Dynamic is symmetrical, and the radial force that the radial force of generation is equal in magnitude, in opposite direction therefore produced can cancel each other, from leaf It is divided into two identical a fluid streams at the water under high pressure that wheel flows out AA two in fig. 2 and enters next stage；Pump smooth running, flow make With scope is wide, high efficient district width, noise be little, long service life, and the desirable abatement vibration means of centrifugal multistage pump multiple centrifugal pump of the present utility model, pump exist Any operating mode operation is no more than power of motor.

Description of the drawings

Fig. 1 is this utility model structural representation；

Fig. 2 is the sectional view in double volute stage casings in Fig. 1（The deflector of two screw types is distributed in symmetrical at a distance of 180 ° On position, the water under high pressure flowed out from impeller is divided into two identical a fluid streams at AA two into the schematic diagram of next stage）.

Symbol description in figure：Pump shaft 1, parts of bearings 2, gland 3, filler 4, inlet segment 5, impeller 6, double volute stage casings 7, water exit end 8, stuffing box body 9, retaining ring 10, volute chamber 11.

Specific embodiment

This utility model is described in detail with optimal embodiment below.

As shown in Figure 1-2, double volute flow guiding machine configuration centrifugal multistage pump multiple centrifugal pumps, including the pump housing；Pump housing medial axis position level Pump shaft 1 is installed；Pump housing centre position is double volute stage casings 7, and double 7 sections of volute stage casing are ellipsoidal structures；Double volute stage casings 7 At least both stage impellers 6 are inside installed, impeller 6 is installed on pump shaft 1, have volute chamber 11 per 6 periphery of one stage impeller, volute chamber is two At a distance of 180 ° of symmetrical screw type diversion cavity；Diversion cavity is located at 7 inner surface of double volute stage casings in the bathtub construction that concaves.It is double 7 left front side external surface of volute stage casing has inlet segment 5, and inlet segment 5 is communicated with the volute chamber 11 of 6 periphery of first order impeller, and inlet segment 5 enters Mouth is outwardly；Double 7 outside surface thereofs of volute stage casing have water exit end 8, and water exit end 8 is communicated with the volute chamber 11 of last 6 periphery of one stage impeller, gone out The outlet of water section 8 is vertically upward；1 or so two ends of pump shaft are passed from double 7 inner chambers of volute stage casing, and pump housing left end is provided with gland 3, there is filler on the inside of gland 3；3 Jing glands screw of gland is compressed axially to filler 4, when pump shaft 1 has phase with filler 4 To during motion, due to the plasticity of filler 4, make filler 4 produce radial force, and be in close contact so as to realize packing seal with pump shaft 1； Pump housing right-hand member is provided with stuffing box body 9, and stuffing box body 9 includes filler 4, seal cage, filling tube, gland 3 and water sealing (sealing water) pipe；Fill out The effect of material letter body 9 be prevent water from spilling pump is outer and air is entered in pump, remain the vacuum in pump, when pump shaft 1 and filler 4 Friction generates heat will lean on water sealing (sealing water) pipe water filling in water seal circle to cool down filler 4；1 or so two ends of pump shaft are separately installed with one Parts of bearings 2, parts of bearings 2 adopt babbit glide bearing, and with oil ring voluntarily band oil lubrication, lubricating oil is using 20 ﹟ or 30 ﹟ Machinery oil；Retaining ring 10 is separately installed with 1 or so two ends of pump shaft, between the parts of bearings 2 and filler 4 of 1 left end of pump shaft, has gear Hydrosphere 10, has retaining ring 10 between the parts of bearings 2 and stuffing box body 9 of 1 right-hand member of pump shaft；The effect of retaining ring 10 is to prevent liquid Into in bearing.Static faying face between the inlet segment 5 of pump, double volute stage casings 7, water exit end 8 employs " O " type oil resistant rubber Sealing ring, by turnbuckle tightening seal.The rotating part sealing that pump is at different levels is reached by the gap of rotating part.

The steering of pump：It is seen as being rotated clockwise from motor direction.

Finally it should be noted that：Obviously, above-described embodiment is only intended to clearly illustrate this utility model example, And the not restriction to embodiment.For those of ordinary skill in the field, may be used also on the basis of the above description To make other changes in different forms.There is no need to be exhaustive to all of embodiment.And thus It is amplified obvious change or change still in protection domain of the present utility model among.

Claims (1)

1. pair volute flow guiding machine configuration centrifugal multistage pump multiple centrifugal pump, including the pump housing；Characterized in that, pump housing medial axis position is horizontally mounted There is pump shaft；Pump housing centre position is double volute stage casings, and double volute stage casings section is ellipsoidal structure；It is provided with double volute stage casings At least both stage impellers, impeller are installed on pump shaft, and enclosing per one-level impeller outer has volute chamber, and volute chamber is two at a distance of 180 ° symmetrical point The screw type diversion cavity of cloth；The left front side external surface in double volute stage casings has an inlet segment, the volute chamber of inlet segment and first order impeller periphery Communicate；Double volute stage casings outside surface thereof has water exit end, and water exit end is communicated with the volute chamber of last one stage impeller periphery；Pump shaft or so two End is passed from double volute stage casings inner chamber, and pump housing left end is provided with gland, and pump housing right-hand member is provided with stuffing box body, pump shaft or so Two ends are separately installed with a parts of bearings.