CN211009067U

CN211009067U - Double-blade impeller and rotor pump thereof

Info

Publication number: CN211009067U
Application number: CN201920946772.2U
Authority: CN
Inventors: 谭在良
Original assignee: Ningbo Bonve Pumps Co ltd
Current assignee: Ningbo Bonve Pumps Co ltd
Priority date: 2019-06-21
Filing date: 2019-06-21
Publication date: 2020-07-14
Anticipated expiration: 2029-06-21

Abstract

The utility model provides a bilobed wheel and rotor pump thereof, both ends face is protruding arc surface (3) of end for laminating mutually with rotor pump body (10) inner chamber arc surface (11) about bilobed wheel (1), protruding arc surface (3) of end and the both sides of bilobed wheel (1) form transition protruding arc surface (4) respectively, set up one section well protruding arc surface (5) in the centre of bilobed wheel (1) left and right sides, form concave yield arc surface (6) of laminating mutually and matcing with transition protruding arc surface (4) between well protruding arc surface (5) and transition protruding arc surface (4), smooth transition between each crossing protruding arc surface and concave yield arc surface (6). The material trapping phenomenon between the traditional double-blade impellers is eliminated, the surface contact between the impellers is increased, and the efficiency and the service life of the rotor pump are improved.

Description

Double-blade impeller and rotor pump thereof

Technical Field

The utility model belongs to the technical field of the rotor pump is made, a two-bladed impeller who is used as the rotor pump rotor is extremely rotor pump related to.

Background

The rotor pump is also called colloid pump, cam pump, universal delivery pump, etc., and belongs to the field of displacement pump. The rotor pump achieves the purpose of conveying fluid materials by means of the periodic conversion of a plurality of fixed volume conveying units in the working cavity; the mechanical energy of the prime motor is directly converted into pressure energy for conveying liquid through the pump; the flow rate of the pump depends only on the value of the change in the volume of the working chamber and its frequency of change per unit of time, theoretically independently of the discharge pressure. The rotor pump relies on 2 rotors rotating in opposite directions in synchronism to generate suction at the inlet during rotation to draw in the fluid material to be conveyed. The rotor of a rotodynamic pump is an impeller, which is typically 1 to 4, most commonly 2 or 3, lobes. A vane rotor: the device is suitable for conveying large-particle materials, has low breakage rate on the large-particle materials, but has large pulsation, low pressure and small volume. A two-blade rotor: the material conveying device is suitable for conveying materials containing medium and small particles, the crushing rate of the medium and small particle materials is relatively low, the medium and small particle materials have pulsation, and the volume capacity of the medium and small particle materials is larger than that of a one-blade rotor. Three-blade rotor: the general rotor type, the volume capacity is greater than other types of rotors, various performance indexes are superior to one-blade rotor and two-blade rotor, and the three-blade rotor has certain breaking rate to particulate matters in the process of conveying materials. The 2 matched impellers divide the inner cavity of the pump body into a plurality of small spaces, and the pump body rotates according to the rotation sequence to change the positions, so that the materials are conveyed to the discharge hole. The materials are continuously conveyed out by the circulation reciprocating. The rotor pump actually achieves the purpose of conveying materials through a pair of impellers rotating synchronously in the working process. Therefore, the ideal state is that the peripheral wall of 2 complex impellers and 2 lateral walls are contacted with the pump body inner chamber wall all the time closely, and the material zero leaks, and the two contact is durable wear-resisting again. Of course, absolute zero leakage and long wear resistance are not possible, and our task is to continuously improve the close contact and wear resistance index.

The traditional double-blade impeller is shown in figure 1 and is shaped like a double-end axe, the upper end surface and the lower end surface of the traditional double-blade impeller are end convex arc surfaces 3 which can be attached to the arc surface of the inner cavity of the rotor pump body, and the traditional double-blade impeller can form surface contact with the arc surface 11 of the inner cavity of the pump body during operation. A section of middle convex arc surface 5 is arranged in the middle of the left side and the right side of the double-blade impeller, and an arc-shaped concave gap 13 is formed between the middle convex arc surface 5 and the end convex arc surface 3, so that sharp corners 14 are formed at the two ends of the end convex arc surface. In operation, the convex arc surface 5 of one bilobed impeller is in line contact with the convex arc surface 3 of the other bilobed impeller, as shown in state 3 in fig. 2 or 3, and is easily worn. The temporary space a formed between the curved concave indentations of the 2 double bladed impellers temporarily traps the material, as shown in state 1 of figure 3, which increases the resistance of the pump. Although the traditional two-blade rotor is surface-sealed between the rotor and the pump body, the rotor and the rotor are in line contact, meanwhile, each blade is in a 45-degree state twice, as shown in a state 1 in fig. 3, a temporary space A formed between arc-shaped concave notches of 2 double-blade impellers can form a trapping phenomenon, so that the trapping phenomenon can occur for 4 times in each revolution of the rotor pump, the energy consumption of the rotor pump is increased, the trapped material can flow back to an inlet of a low-pressure area, the flow of the displacement in each revolution is small, and the working efficiency of the rotor pump is reduced. In the conventional three-vane rotor, as shown in fig. 4, 5 and 6, when the rotor is in operation, the rotor and the pump body are in linear sealing, and although a certain gap is formed between the rotor and the pump body, the rotor and the pump body are easily worn in material flow for a long time, so that the service life of the rotor pump is seriously influenced.

Disclosure of Invention

The utility model aims to solve the technical problem to above-mentioned technical current situation, provide a bilobed impeller who is used as the rotor pump rotor.

The utility model provides a technical scheme that above-mentioned technical problem adopted does:

the utility model provides a bilobed wheel (1) as rotor pump rotor, for the tensile body that has the same cross section, shaft hole (2) have been seted up at its center, bilobed wheel (1) cross section uses the location water flat line at shaft hole (2) center presents longitudinal symmetry as the central line, with the location vertical line at shaft hole (2) center presents bilateral symmetry as the central line, its characterized in that, both ends face is the protruding arc surface (3) of end that laminates with rotor pump body (10) inner chamber arc surface (11) about bilobed wheel (1), protruding arc surface of end (3) forms transition protruding arc surface (4) respectively with the both sides of bilobed wheel (1), the centre of bilobed wheel (1) left and right sides sets up protruding arc surface (5) in one section, form between protruding arc surface (5) of well and the protruding arc surface of transition (4) with concave arc surface (6) that transition protruding arc surface (4) matches mutually laminates, the convex arc surfaces and the concave arc surfaces (6) which are intersected are in smooth transition.

The following is a further proposal of the double-blade impeller (1).

The shaft hole (2) is provided with more than 1 convex rib (7) or more than 1 key slot.

The shaft hole (2) is provided with 4 convex ribs (7) which are uniformly distributed along the circumference of the shaft hole (2), or 4 key grooves which are uniformly distributed along the circumference of the shaft hole (2).

The periphery of the double-blade impeller (1) is wrapped by a wrapping layer (8) for reducing the gaps between the rotor and the inner cavity of the pump body (10) and between the rotor and increasing the wear resistance of the double-blade impeller.

The wrapping layer (8) is a rubber layer.

The wrapping layer (8) is a plastic layer.

The wrapping layer (8) is a polytetrafluoroethylene plastic layer.

A rotor pump comprises a pump body (10), wherein two parallel rotating shafts (9) which are output through a synchronous box and rotate oppositely penetrate through the pump body (10), and 2 double-blade impellers (1) which serve as interactive rotors in the pump body (10) are fixedly arranged on the two rotating shafts (9) respectively.

The double-blade impeller of the utility model has no material trapping phenomenon between the rotor and the rotor, thus thoroughly solving the material trapping phenomenon between the rotor and the rotor of the traditional double-blade impeller; the utility model discloses a all be surface contact between the bilobed blade impeller and the pump body, form surface contact between the protruding arc surface of transition of rotor and the concave yield arc surface of 1 rotor in addition, eliminated the predicament phenomenon to obviously improve the operating efficiency and the life of rotor pump.

Drawings

Fig. 1 is a front view schematically showing a conventional double-bladed impeller used as a rotor of a rotary pump.

Fig. 2 is a schematic view of a prior art double-vane impeller in a rotor pump body.

Fig. 3 is a schematic view of 1 pair of prior art double-bladed impellers in different operating states.

Fig. 4 is a front view schematically showing a three-bladed impeller used as a rotor of a conventional rotary pump.

Fig. 5 is a schematic view of a prior art three-bladed impeller in a rotodynamic pump body.

Fig. 6 is a schematic view of 1 pair of prior three-blade impellers in different operating states.

Fig. 7 is a schematic front view of the dual-blade impeller of the present invention.

Fig. 8 is a schematic view of the double-vane impeller of the present invention in the rotor pump body.

Fig. 9 is a schematic view of the dual-bladed impeller of the present invention in different operating states.

Fig. 10 is a schematic view of the double-blade impeller of the present invention with a wrapping layer wrapped around the outer periphery.

Fig. 11 is a schematic cross-sectional view of a two-bladed impeller of the present invention with a layer of wrapping material wrapped around the periphery.

Detailed Description

Hereinafter, a specific embodiment of the present invention will be described with reference to fig. 7 to 11.

The double-bladed impeller 1 of the present invention, used as a rotor of a rotopump, is a stretched body having the same cross section as shown in fig. 7, the center of the impeller is provided with a shaft hole 2, the cross section of the double-blade impeller 1 is symmetrical up and down by taking a positioning horizontal line at the center of the shaft hole 2 as a central line, the vertical positioning line at the center of the shaft hole 2 is used as a central line to present bilateral symmetry, the upper end surface and the lower end surface of the double-blade impeller 1 are end convex arc surfaces 3 which are attached to an inner cavity arc surface 11 of a rotor pump body 10, transition convex arc surfaces 4 are respectively formed on the end convex arc surfaces 3 and the two sides of the double-blade impeller 1, a section of middle convex arc surface 5 is arranged in the middle of the left side and the right side of the double-blade impeller 1, concave arc surfaces 6 which are attached to the transition convex arc surfaces 4 and matched with the transition convex arc surfaces 4 are formed between the middle convex arc surfaces 5 and the transition convex arc surfaces 4, and smooth transition is realized between the crossed convex arc surfaces and the concave.

As shown in fig. 7, the shaft hole 2 of the double-vane impeller 1 is provided with 4 ribs 7 uniformly distributed along the circumference of the shaft hole 2, or provided with 4 key slots uniformly distributed along the circumference of the shaft hole 2, for being fixedly connected with the rotating shaft 9 of the rotor pump.

As shown in fig. 10 and 11, the outer periphery of the double-vane impeller 1 is wrapped by a wrapping layer 8 for reducing the clearance between the rotor and the inner cavity of the pump body 10 and between the rotor and the rotor, and also increasing the wear resistance. The wrapping layer 8 is a rubber layer or a plastic layer, and the plastic layer is preferably a polytetrafluoroethylene plastic layer because the polytetrafluoroethylene plastic has good corrosion resistance and self-lubricating property. The periphery of the double-blade impeller 1 is coated with a rubber or plastic coating layer 8, so that gaps between the pump body and the rotor and between the rotor and the rotor can be reduced, the working efficiency of the rotor pump can be improved, the material backflow amount is reduced, and the suction force of the pump is increased; meanwhile, the sealing performance and the wear resistance between the rotor and the pump body are improved.

The utility model discloses the rotor pump, as shown in fig. 8, including the pump body 10, two of the parallel of synchronous case output turn to opposite pivot 9 and pass the pump body 10, and the biplate impeller 1 more than 2 as interactive rotor is fixed mounting respectively on two pivot 9 in the pump body 10.

When the pump is operated, as shown in fig. 8, the upper and lower end faces of the bilobed impeller 1 are end convex arc faces 3 which are attached to the arc face 11 of the inner cavity of the pump body 10 of the rotor pump, so that the upper and lower end faces of the bilobed impeller 1 are always in surface contact with the pump body. The utility model discloses 1 is shown as figure 9 to the bilobed impeller in different running states in the pump body 10, and state 1 in the picture, the respective protruding arc surface of transition 4 of 2 bilobed impellers mutually contact, form the line contact to the trapping material phenomenon between traditional bilobed impeller rotor and the rotor has been eliminated. In the figure, the state 2 is that the middle convex arc surface 5 of 1 double-blade impeller rotor is contacted with the end convex arc surface 3 of the other 1 double-blade impeller rotor to form line contact. In the figure, the state 3, wherein the transition convex arc surface 4 of 1 double-blade vane rotor is contacted with the concave arc surface 6 of the other 1 double-blade vane rotor, and the concave arc surface 6 is jointed and matched with the transition convex arc surface 4, so that surface contact is formed. Compared with line contact, the surface contact can obviously improve the sealing property and the wear resistance between the two contact parts, reduce the medium backflow amount, increase the suction force of the pump, and obviously improve the working efficiency and the service life of the rotor pump.

The double-blade impeller 1 of the utility model has no material trapping phenomenon between the rotor and the rotor, and thoroughly solves the material trapping phenomenon between the rotor and the rotor of the traditional double-blade impeller; the utility model discloses a all be surface contact between the bilobed blade impeller 1 and the pump body, form surface contact between the protruding arc surface 4 of transition of rotor and the concave yield arc surface 6 of 1 other rotor, eliminated the predicament phenomenon to obviously improve the operating efficiency and the life of rotor pump.

Claims

1. The utility model provides a bilobed impeller (1), for the tensile body that has the same cross section, shaft hole (2) have been seted up at its center, bilobed impeller (1) cross section uses the location water flat line at shaft hole (2) center presents longitudinal symmetry for the central line, with the vertical line in location at shaft hole (2) center presents bilateral symmetry for the central line, its characterized in that, both ends face is the protruding arc surface (3) of end that laminates with the rotor pump body (10) inner chamber arc surface (11) about bilobed impeller (1), protruding arc surface (3) of end forms transition protruding arc surface (4) respectively with the both sides of bilobed impeller (1), set up protruding arc surface (5) in one section in the centre of bilobed impeller (1) left and right sides, form between protruding arc surface (5) of well and the protruding arc surface (4) of transition and laminate concave recess arc surface (6) that match with protruding arc surface (4) of transition, the convex arc surfaces and the concave arc surfaces (6) which are intersected are in smooth transition.

2. The double-bladed impeller (1) according to claim 1, characterized in that said axial hole (2) is provided with more than 1 rib (7) or with more than 1 keyway.

3. The double-bladed impeller (1) according to claim 2, characterized in that said axial hole (2) is provided with 4 ribs (7) uniformly distributed along the circumference of the axial hole (2) or with 4 keyways uniformly distributed along the circumference of the axial hole (2).

4. The double-bladed impeller (1) according to claim 1, characterized in that the periphery of said double-bladed impeller (1) is coated with a coating (8) for reducing the clearance and increasing its wear resistance.

5. The two-bladed impeller (1) according to claim 4, characterized in that said wrapping (8) is a rubber layer.

6. The double-bladed impeller (1) according to claim 4, characterized in that said wrapping (8) is a plastic layer.

7. The double-bladed impeller (1) according to claim 6, characterised in that said wrapping (8) is a polytetrafluoroethylene plastic layer.

8. A rotor pump comprising a pump body (10) through which two parallel rotating shafts (9) of opposite rotation output by a synchronizing box pass, 2 double-bladed impellers (1) according to any one of claims 1 to 7 in the pump body (10) being interactive rotors being fixedly mounted on the two rotating shafts (9), respectively.