CN2328816Y - Two end liquid feeding labyrinth screw pump - Google Patents

Abstract

The utility model discloses a labyrinth type screw pump, which is used for the occasions with small flow and high pump lift, and the pump lift can reach up as high as 300 to 400 meters. The liquid inflow cavity for the liquid inflow of the two ends of the labyrinth type screw pump is close to a spiral stator part and a spiral rotor part, an annular jointing liquid distribution cavity which is used for liquid outflow and liquid storage and a flow guide hole which is communicated with the liquid distribution cavity and a liquid inflow cavity are arranged in the liquid inflow cavity, corresponding flow guide surfaces are arranged on the rotor and the minor axis of the rotor and are matched with mechanical sealing devices. The utility model solves the problem of the practical improvement of the prior art and shows the new foreground of the structure products.

Description

Both-end feed liquor mazy type volute pump

Model utility relates to non-varactor pump, specifically a kind of belong to high-lift, small flow carry the pump of liquid with the helical rotor rotation.

Existing volute pump comprises the patent 91227268.6 disclosed technological schemes identical with title, and structure that is adopted and packing seal because all be difficult to get a desired effect, are difficult to make potential advantage to obtain performance, and practical application is had any problem.

The purpose of this utility model is to provide a kind of improved both-end feed liquor mazy type volute pump technological scheme, utilizes the effect of cloth sap cavity, the cooperative mechanical sealing of setting up obviously to improve the complete machine service behaviour, has solved the difficult problem of application prospect aspect.

The both-end feed liquor mazy type volute pump of model utility, comprise bearing, helical stator, helical rotor reaches two minor axises that are unified into an integral body with it, and seal arrangement is housed on axle, the pump housing partly is symplex structure, the centre is provided with liquid entering hole, liquid outlet, liquid entering hole divides two the road to be communicated with admission chamber from two ends, an external motor of axle head of helical rotor, it is characterized in that being provided with an annular near the helical stator of admission chamber and helical rotor, the cloth sap cavity of fluid storage usefulness, the pod apertures that is provided with circumferential configuration and communicates between cloth sap cavity and the admission chamber, be provided with the guide face of garden taper type in the said admission chamber between helical rotor and its minor axis, said seal arrangement is a mechanical seal device.

The utility model had both kept the advantage that both-end feed liquor mazy type volute pump axial force offsets, working surface does not have the machinery contact, bearing life is grown, again owing to be provided with the cloth sap cavity, water conservancy diversion and the evenly effect of feed flow have been increased, adopt mechanical seal to improve sealability, thereby solved this class formation product technology performance problem that influences practical application on the low side, made the application of mazy type volute pump present good prospect.

Further be illustrated below in conjunction with specific embodiment and accompanying drawing.

Fig. 1 is the structural principle schematic representation of model utility.

Fig. 2 is the A-A cross sectional view at Fig. 1 liquid in-out mouth place.

Fig. 3 is the axial B-B cross sectional view in Fig. 1 liquid entering hole position.

Fig. 4 is the enlarged view of cloth sap cavity structure.

Referring to accompanying drawing.

As seen from Figure 1, both-end feed liquor mazy type volute pump is made up of bearing 1, the pump housing 2 and motor three parts, and motor does not show in the drawings, and motor is connected on the axle head on the left side.Pump housing part-structure symmetry on the bearing, two ends are provided with each one of lid and stifle.Liquid entering hole 19 is positioned at the side (seeing Fig. 2,3) of the pump housing, is liquid outlet 5 above.Establish helical stator 3, helical rotor 4 in the pump housing, outside thread 7a on the helical rotor 4 and the internal thread 7b on the helical stator are multiple thread; And leave the gap, do not contact mutually.Its number of starts then can be selected between 5-120.

Outside thread 7a bilateral symmetry on the helical rotor 4, rotation direction are opposite, and the liquid at its two ends is caught up with toward the centre.Be included in the internal thread 7b of the outer helical stator 3 of helical rotor, also bilateral symmetry, rotation direction is opposite, and, must make the rotation direction of its internal thread 7b opposite with the rotation direction of the corresponding outside thread 7a of the helical rotor that is contained.In order to increase the resistance of helical rotor 3 when liquid is carried in the centre, make the part kinetic energy that is transferred liquid change pressure into and can improve its pressure head.At last, the fluid ring cavity 6 by the centre pumps from liquid outlet 5.The tooth-shape structure of screw thread adopts triangle, rectangle, trapezoidal saw shape and garden shape.First-selected triangle, garden arc or trapezoidal.Diametrical clearance Δ d can select between the 0.045-1.200 millimeter between screw thread, and concrete data are determined with technical parameter, the specification of different product.The helical rotor two ends are connected to concentric minor axis, are respectively equipped with sealed support 9 and bearing housing 10 on the minor axis, and sealed support is provided with mechanical seal.Comprise O-ring seals 14 and 15.The 13rd, oil sealing.Ball bearing 11 is housed in the bearing housing.The two ends of helical rotor 4 respectively form an admission chamber 8, the helical stator of close admission chamber and helical rotor are provided with an annular, the cloth sap cavity 18 that fluid storage liquid is used, it is formed by the involutory configuration of the vallecular cavity of two annulars, binding site is the inboard of thread head, screw thread 7 places of helical rotor end are furnished with a circle pod apertures 17 along garden Zhou Fangxiang, other has the guide face 16 that is the garden taper type between helical rotor and rotating shaft, when rotating, liquid medium makes liquid pass through pod apertures under the action of the centrifugal in the admission chamber, enter the cloth sap cavity, can ensure the good homogeneous continuous liquid supply.Mechanical seal shown in the figure is the conventional mechanical sealing configuration, and its sealing effect is reliable more than packing seal here, and test shows can satisfy product requirement.Fig. 2,3 has represented the position that is provided with of liquid entering hole 19 emphatically, and separately two branch roads are guided the approach that two ends arrive admission chamber 8 into.The 20th, liquid inlet pipe, the 21st, annular admission chamber 8 is directly led in the feed liquor duct of vertical turnover.Fig. 4 is the enlarged view of c shown in Figure 1 part, expression cloth sap cavity 18 is formed by two involutory configurations of circular groove that the branch of correspondence is located on helical stator and the helical rotor, epitrochanterian cell wall is provided with the pod apertures 17 that distributes along circle, links up feed flow supply contact between cloth sap cavity 18 and the admission chamber 8.

The working procedure of brief description both-end feed liquor mazy type volute pump:

1, introduces liquid mediums from liquid entering hole 19, enter the admission chamber 8 at helical rotor two ends along liquid inlet pipe 20 and feed liquor duct 21;

2, start external motor, drive helical rotor 4 and rotate, make the liquid medium in the admission chamber enter cloth sap cavity 18, and then enter among the gap between screw;

3, under the effect of up and down corresponding screw thread 7a and 7b, body medium is advanced to the centre from two ends, improve pressure head gradually, be pooled in the fluid ring cavity 6 and draw from liquid outlet 5 again.

The experimental prototype of present embodiment, 2900 rev/mins of input power 22kw (substituting) rotating speeds, threading path is 0.30 millimeter to clearance delta d, several 72, long 210 millimeters of single-ended screw thread 7b journey, diameter 155mm, 300 meters of output lifts, the aqueous medium flow reaches 6 meters/hour.This external noise and machine shake very little.Reached the effect of expection fully.

Claims (1)

1, a kind of both-end feed liquor mazy type volute pump, comprise bearing (1), helical stator (3), helical rotor (4) and be unified into two minor axises of an integral body with it and seal arrangement is housed on axle, the pump housing (1) part is symplex structure, the centre is provided with liquid entering hole (19), liquid outlet (5), liquid entering hole (19) divides two the road to be communicated with admission chamber (8) from two ends, an external motor of axle head of helical rotor (4), it is levied and is to be provided with an annular near the helical stator (3) of admission chamber (8) and helical rotor (4), the cloth sap cavity (18) that fluid storage liquid is used, the pod apertures (17) that is provided with circumferential configuration and communicates between cloth sap cavity (18) and the admission chamber (8), be provided with the guide face (16) of garden taper type in the said admission chamber between helical rotor and its minor axis, said seal arrangement is a mechanical seal device.

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