CN2103670U - High-lift small-flow maze screw pump - Google Patents

Abstract

The utility model provides a high-lift small-flow maze screw pump which is characterized in that a pump shell inside is sheathed with a barrel screw sleeve; the front end of a rotating shaft in the barrel screw sleeve is sheathed with a screw rotor simultaneously rotating with the rotating shaft; the front part of the rotor is provided with a taper false ogive, and the shaft segment at the back part of the rotor is provided with a sealing device. After pumped in from the circumferential inlet holes of the pump shell, medium is continuously pushed forward axially by the interactions of the screw rotor and the screw threads of the screw sleeve, is gradually formed into a press head and is finally pumped out from outlet holes at the front end of the pump shell. Thus, the utility model is a novel high-lift small-flow pump with high efficiency and low noise.

Description

High-lift small-flow maze screw pump

The utility model relates to a kind of pump, particularly a kind of labyrinth screw pump that soars small flow.

In recent years, high-lift low-capacity pump is very fast in China's development, DaM1 type such as the Ministry of Aerospace Industry's the 11st Research Institute, the XB series small flow anti-corrosive pump of accessory six factories of Dalian anti-corrosive pump affiliated company all belongs to this type of, but, they all belong to centrifugal, their working principle is to lean on the centrifugal force of impeller to reach required lift, expect higher lift, then must strengthen the diameter of impeller and reduce its width of flow path, but so, not only caused the reduction of efficient, and stop up easily, especially all the more so when breaking short fibre class material, in addition, the requirement of narrow runner makes processing become difficult again.Under the situation of small flow, fluid can not be full of the impeller inner flow passage, therefore has the airflow breakaway vortex to produce, and this airflow breakaway vortex also is a principal element that causes decrease in efficiency, and in addition, the airflow breakaway vortex has also caused the generation of vibration and noise.Particularly when specific speed was following less than 20, the efficiency value of the pump of exocentric structure was very low.

The purpose of this utility model just is to overcome the above-mentioned shortcoming and defect of existing in prior technology, and the labyrinth screw pump of a kind of high-lift small flow, simple in structure, high efficiency, low noise is provided.

Effect of the present utility model is:

Under the rotating speed of routine, have higher lift, especially under the lower situation of specific speed, still can keep higher efficiency value.Because it is very narrow that its runner gap can be designed, therefore, there is not the airflow breakaway vortex to produce, so, have higher efficient and lower noise and stable flow characteristic.In addition, this kind pump is to be made of rotor that has multi-head spiral and screw-casing, has characteristic of simple structure, in addition, the acquisition of this pump head relies on helical tooth flank to drive progressively supercharging and obtains, thereby its pressure head is stable, vibration is little, noise is little, the difficult obstruction.

The realization of the utility model purpose reaches like this, be set with a bearing support at the rotating shaft back segment that turned by motor, be connected with an awl tubular pump case on the bearing support front end flange, the pump case internal sleeve is equipped with a tubular screw-casing, the rotating shaft leading portion cover of tubular screw-casing inside is connected with a helical rotor with the rotating shaft rotation, there is a taper rectification cap rotor front portion, be equipped with stuffing box packing case and gland on the rotating shaft section at rotor rear portion, when medium is gone into to squeeze into by the circumferential hand-hole of pump case, the helical rotor that the process rotation direction is opposite and the interaction of screw-casing, and the axial force that medium produced is the pressure of pump, under this pressure effect promoted, medium was got by the front end place of portalling.

Concrete structure of the present utility model is that the following examples and accompanying drawing thereof provide.

Fig. 1 is first kind of structure principle chart of the present utility model.

Fig. 2 is second kind of structure principle chart of the present utility model.

Below in conjunction with embodiment and attached Fig. 1 and 2 thereof concrete structure of the present utility model is described in detail:

Having spiral shell level 5a outside the bull with the periphery of the helical rotor 5 of the solid mutually cover of rotating shaft 9 leading portions, at helical rotor 5 outside spacer sleeves the screw-casing 4 that has multiple-internal screw thread 4a is housed, screw-casing 4 outer cover are equipped with the pump case 1 of awl tubular, one lining 2 identical with its shape is housed in the taper section of pump case 1 leading portion, one taper rectification cap 3 is arranged in lining 2 inner chambers of helical rotor 5 front portions, on rotating shaft 9 segment lengths at helical rotor 5 rear portions a seal arrangement 6 is arranged, the import blue dish 1a and the blue dish of the outlet 1b that differ 90 degree are arranged on the pump case 1, and there is a flange plate 1c who is connected with motor flange or external bearing block flange at pump case 1 cylindrical section rear portion.Referring to Fig. 1 and Fig. 2.

Multiple thread 5a on helical rotor 5 and its outer screw-casing 4 of interval suit is opposite with the thread rotary orientation of 4a, and the radial diameter gap between two screw threads is in 0.15 to 0.8 millimeter scope.Referring to Fig. 1 and Fig. 2.

Be sleeved on seal arrangement 6 on rotating shaft 9 segment lengths and fill out the packing seal 6b of putting by the Stuffing box 6a of the bowl-shape of hollow and Qi Nei and constitute, press at packing seal 6b rear portion to be connected with sealing gland 8, an axle sleeve 7 is arranged between seal arrangement 6 and the rotating shaft 9.Referring to Fig. 1 and Fig. 2.

Between the outer lining 2 of taper rectification cap 3 and its annular space is arranged, taper rectification cap 3 be directly twist be connected in rotating shaft 9 front ends or directly and screw-casing 4 be linked as an overall structure.Referring to Fig. 1 and Fig. 2.

First kind of structure of the present utility model (being Fig. 1) directly interlocks mutually with machine shaft 9, and it is relatively simple for structure, and the section of spy lengthening is outward but must make motor shaft.

Second kind of structure of the present utility model is that motor shaft need not extend, and adopt a rotating shaft 9 to be housed in the pump housing, then machine shaft and rotating shaft rear end are coupled together by shaft coupling, at this moment, to install the bearing support 10 of a ∪ shape tubular at pump case 1 rear portion additional, place spring bearing 11 at bearing support 10 middle parts and rear portion and get final product.Two kinds of pump case outer bottoms all have the base mouth referring to Fig. 2.

Working mechanism of the present utility model is:

After medium enters thread pitch by the blue dish of the import on the circumferential top of pump case, then under helical rotor rotation and screw-casing relativity, produce axial force, this axial force then promotes medium advances, and medium whenever exceeded a screw thread, and pressure increases progressively once.So the acquisition of medium pressure energy is different from the centrifugal action of centrifugal pump, but produce by the thread driving.So the pressure head of labyrinth spiral is directly proportional with number of starts and axial length.The motion of medium in honeycomb ceramics belongs to turbulent skin friction, the square value of pressure head direct ratio what heliconid roulette speed.These are different with the laminar motion in the single-screw body, and under same diameter and rotating speed, its pressure head is much smaller, because its motion belongs to the laminar flow friction, rely on viscous friction and obtain pressure head, so proportional with the first power of moving.Labyrinth spiral pressure head and dielectric viscosity are irrelevant substantially, and this is the main distinction of moving with single-screw.In addition, pump head is also relevant with spirochetal flute profile.Used flute profile generally has rectangle, trapezoidal, triangle and half garden shape, and wherein the highest, the semicircular hydraulic efficiency of the pressure head of triangle profile of tooth is the highest.Condition according to design can suitably be selected for use.

Therefore the high-lift low-capacity pump that this labyrinth screw pump is a kind of novel structure, pressure head is stable, efficient is high, noise is low has good application prospects.

Claims (4)

1, a kind of high-lift small flow labyrinth screw pump, it is characterized in that: having spiral shell level 5a outside the bull with the periphery of the helical rotor 5 of the solid mutually cover of rotating shaft 9 leading portions, at helical rotor 5 outside spacer sleeves the screw-casing 4 that has multiple-internal screw thread 4a is housed, screw-casing 4 outer cover are equipped with the pump case 1 of awl tubular, one lining 2 identical with its shape is housed in the taper section of pump case 1 leading portion, one taper rectification cap 3 is arranged in lining 2 inner chambers of helical rotor 5 front portions, on rotating shaft 9 segment lengths at helical rotor 5 rear portions a seal arrangement 6 is arranged, the import blue dish 1a and the blue dish of the outlet 1b that differ 90 degree are arranged on the pump case 1, and there is a flange plate 1c who is connected with motor flange or external bearing support 10 flanges at pump case 1 cylindrical section rear portion.

2, according to the described high-lift small flow labyrinth screw pump of claim 1, it is characterized in that: the multiple thread 5a on helical rotor 5 and its outer screw-casing 4 of interval suit is opposite with the 4a thread rotary orientation, and the radial diameter gap between two screw threads is in 0.15 and 0.8 millimeter scope.

3, according to claim 1 or 2 described high-lift small flow labyrinth screw pumps, it is characterized in that: be sleeved on seal arrangement 6 on rotating shaft 9 segment lengths and fill out the packing seal 6b of putting by the Stuffing box 6a of the bowl-shape of hollow and Qi Nei and constitute, pressure is connected with sealing gland 8 at packing seal 6b rear portion, and an axle sleeve 7 is arranged between seal arrangement 6 and the rotating shaft 9.

4, according to claim 1 or 2 described high-lift small flow labyrinth screw pumps, it is characterized in that: between the outer lining 2 of taper rectification cap 3 and its annular space is arranged, taper rectification cap 3 be directly twist be connected in rotating shaft 9 front ends or directly and screw-casing 4 be linked as an overall structure.