CN105134544A

CN105134544A - Efficient small submersible pump

Info

Publication number: CN105134544A
Application number: CN201510581565.8A
Authority: CN
Inventors: 余文凌
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-09-11
Filing date: 2015-09-11
Publication date: 2015-12-09

Abstract

The invention provides an efficient small submersible pump which comprises a submersible motor, a pump body, a rotor, a piston, a baffle tongue, a standard shaft and an eccentric wheel. An eccentric distance E1 exists between the axis of the standard shaft and the axis of an inner cavity of the pump body. An eccentric distance E2 exists between the axis of the eccentric wheel and the axis of the standard shaft. By means of the moving principle of an eccentric mechanism, suction and discharge functions of the pump are achieved, when the submersible motor drives the standard shaft to rotate, the standard shaft and the eccentric wheel enable the rotor to rotate through the piston, at the time, the piston moves along a radial through hole in the rotor in a reciprocating mode while rotating around the standard shaft, the volume is changed, and liquid is sucked in from a suction cavity and then discharged from a discharge cavity, and circulation is unceasingly performed; due to blocking of the baffle tongue, pressure difference is generated between the discharge cavity and the suction cavity to form discharge pressure; the volume-changing displacement pump principle is little in hydropower loss and volume loss, efficiency is over 70%, the energy-saving effect is obvious, and the submersible pump is an efficient energy-saving product upgraded from a centrifugal submersible pump.

Description

Efficient small submersible pump

Technical field

The present invention relates to a kind of displacement pump, be particularly applicable to the efficient small submersible pump of operation under liquid.

Background technique

Current known submersible pump is all centrifugal submersible pumps, this pump structure is simple, component are few, cost is low, therefore market owning amount is very big, but its efficiency is low, particularly small compact radial submersible pump efficiency is extremely low, the efficiency of such as, working out in Chinese machinery industry standard JB/T8902-96 " small-sized diving electric pump ", flow per hour is 1.5 tons, lift is the pump of 7 meters, its efficiency is 14.2%, flow per hour is 3 tons, lift is the pump of 8 meters, its efficiency is 21.9%, visual efficiency is extremely low, belong to energy-consuming product, the numerical value of the specific speed being pump of tracing it to its cause is little, concerning centrifugal pump, specific speed is little, efficiency is low is an intrinsic fatal defects, the difficult problem that all cannot overcome so far, in addition the impeller outlet width of small compact radial submersible pump is little, and casting manufacturability is poor, the blade path rough surface in impeller, easily by blockings such as pasture and water, snail shell, impurity, and easy motor damage time serious, for the shortcoming of centrifugal submersible pumps, adopting positive displacement pump to replace centrifugal pump is a direction, because the efficiency of displacement pump is general all at 60%-90%, piston type reciprocating pump efficiency is very high, but because inlet/outlet has the existence of one-way valve, the reciprocal time of pump is very low, complicated structure, the shortcoming that I exists for above-mentioned centrifugal and submersible pump and other submersible pumps, propose that a kind of volume is little, structure is simple, cost is low, runner is unobstructed, efficiency more than 70%, energy-efficient " rotor-type submersible pump ", and patented power, the patent No. is 201010202658.2, afterwards, I further provides that a kind of technical conceive is different, energy-saving effect is identical, the application for a patent for invention of " rotor-type submersible pump of eccentric shaft and motor direct connection " more compact in structure, and application number is 201410122748.9, its advantage is: the axial dimension of whole pump is reduced, and structure is more compact.

The good effect of these two kinds of rotor-type submersible pumps is: by the efficiency of small compact radial submersible pump 15%, 20%, bring up to the efficiency of rotor-type submersible pump 70%, 80% quickly, energy-saving effect clearly, belong to energy-conserving product, but blemish in an otherwise perfect thing: these two kinds of rotor-type submersible pumps are owing to being subject to structural limitations, and its eccentric shaft is all single-ended supporting, belong to cantilever structure, bear the limited in one's ability of piston radial power, therefore the range of flow of pump and pressure range are all restricted.

Summary of the invention

The object of the invention is to: provide a kind of technical conceive difference, energy-efficient effect identical, its eccentric shaft can bear larger piston radial power, thus expands the range of flow of pump and the efficient small submersible pump of head pressure scope.

In order to achieve the above object, efficient small submersible pump of the present invention, comprise the pump housing 1, be contained in the described pump housing 1 inner chamber and and its coaxial rotor 2, described rotor 2 is shaped with at least one radial direction through hole 3, described radial direction through hole 3 built with piston 4 that can be reciprocating by eccentric stiffener, in the described pump housing 1, is shaped with a pair cut water 5 of being isolated in zone of high pressure and low pressure area; Its special way is: the reciprocating eccentric stiffener of described drive piston 4 is made up of standard shaft 6 and one or more eccentric wheel 7, one end of described standard shaft 6 and the projecting shaft direct connection of submersible motor 8, the other end of described standard shaft 6 passes the eccentric opening 9 of the eccentric wheel 7 of described piston 4 waist, and et key (10) connects; The axis of described standard shaft 6 has a throw of eccentric E1 to the pump housing 1 inner chamber axis; The axis of axis to described standard shaft 6 of described eccentric wheel 7 has a throw of eccentric E2.

The value of throw of eccentric E2 described in the technology of the present invention solution can be equal with the value of throw of eccentric E1.

The value of throw of eccentric E2 described in the technology of the present invention solution can be greater than the value of throw of eccentric E1.

In the technology of the present invention solution, the described pump housing 1 inner chamber can be fixedly mounted with a coaxial cut water cover 11, and described cut water cover 11 is shaped with a pair cut water 5 of being isolated in zone of high pressure and low pressure area.

The cylindrical of rotor 2 described in the technology of the present invention solution can be fixedly mounted with a rotor cover 12, described rotor cover 12 has and the radial hole 13 that the radial direction through hole 3 of rotor 2 is coaxial, diameter is less, the both sides of described radial hole 13 are shaped with the narrow groove 14 communicated, and form the radial flow path 15 of rotor cover 12.

The width of cut water 5 described in the technology of the present invention solution can to overlap the width of the radial flow path 15 of 12 equal with rotor.

The present invention utilizes the motion principle of eccentric stiffener, realize the suction function of pump, as shown in Figure 1, when submersible motor 8 drives standard shaft 6 to rotate, eccentric wheel promotes piston 4 makes rotor 2 rotate, and at this moment piston 4 rotates around standard shaft 6, radial direction through hole 3 on one edge rotor 2 is reciprocating, the to-and-fro motion of piston 4 produces volume-variation, sucks liquid and discharges liquid from discharge side again, constantly circulate from suction chamber; Due to the obstruct of cut water 5, make to produce pressure difference between discharge side and suction chamber, form head pressure; The displacement pump principle of this volume-variation, hydraulic loss and volumetric loss are all little, energy-efficient, and piston 4 is double-action work, and rotor often rotates a circle liquor charging twice, and under motor runs up, liquid stream exports steady no pulse, vibrate little, noise is low.

If throw of eccentric E2 and throw of eccentric E1 is equal, then motor turns around, rotor 2 turns of half-turns, and the stroke of piston 4 is 4 times of throw of eccentric E1; If throw of eccentric E2 is greater than throw of eccentric E1, then motor turns around, and rotor 2 also turns around, and the stroke of piston 4 is 2 times of throw of eccentric E1.

Good effect of the present invention: one is energy-efficient, hydraulic loss is little, volumetric efficiency is high, total efficiency can reach more than 70%, belongs to outside energy-efficient product, and two are standard shafts 6 is dual-supportings, be bearing on bearing 19 and 20 respectively, larger radial force can be born, multiple piston can be arranged, such as two or three, the flow of submersible pump is doubled, and delivery pressure is higher; Three is order about the reciprocating eccentric stiffener of piston 4 to be made up of standard shaft 6 and one or more eccentric wheel 7, eccentric wheel 7 is packed in the rolling bearing 16 of piston 4 waist, standard shaft 6 and eccentric wheel 7 key 10 connect, replace camshaft by such structure, be convenient to processing and assembling, speed production flow process, reduce cost of production.

Accompanying drawing explanation

The structural drawing of Fig. 1 to be the embodiment of the present invention be single piston.

Fig. 2 is the A-A sectional view of Fig. 1.

Fig. 3 is the B-B sectional view of Fig. 2.

Fig. 4 is the structural drawing of the width of cut water 5 and the equal diameters of piston 4.

Fig. 5 is the projection drawing of sealing surface in Fig. 4

Fig. 6 be cut water 5 width with rotor overlap the width of the radial flow path 15 on 12 equal time structural drawing.。

Fig. 7 is the projection drawing of sealing surface in Fig. 6

The structural drawing of Fig. 8 to be the embodiment of the present invention be two row's pistons 4.

Embodiment

The A-A sectional view of Fig. 1 to be the embodiment of the present invention single piston structure figure, Fig. 2 be Fig. 1, Fig. 3 is the B-B sectional view of Fig. 2.

Show in figure, efficient small submersible pump of the present invention, comprise the pump housing 1 with suction port and exhaust port, be contained in the pump housing 1 inner chamber and and its coaxial rotor 2, rotor 2 is shaped with at least one row's radial direction through hole 3, radial direction through hole 3 is built with can reciprocating piston 4 by eccentric stiffener, the pump housing 1 inner chamber is also equipped with coaxial cut water cover 11, cut water cover 11 is shaped with a pair cut water 5 of being isolated in the zone of high pressure in the pump housing 1 and low pressure area, the reciprocating eccentric stiffener of piston 4 is driven to be made up of standard shaft 6 and one or more eccentric wheel 7, one end of standard shaft 6 and the projecting shaft direct connection of submersible motor 8, eccentric wheel 7 be removable mounting in the hole of piston 4 waist, the cylindrical of eccentric wheel 7 is fixed with bearing 16, the other end of standard shaft 6 through the eccentric opening 9 on eccentric wheel 7, and by key connecting, the axis of standard shaft 6 has a throw of eccentric E1 to the pump housing 1 inner chamber axis, and the axis of axis to standard shaft 6 of eccentric wheel 7 has a throw of eccentric E2.

Rotor 2 is bearing on bearing 17 and bearing 18; Standard shaft 6 is bearing on bearing 19 and bearing 20,

The cylindrical of rotor 2 is fixedly mounted with a rotor cover 12, rotor cover 12 has the less radial hole of the diameter coaxial with the radial direction through hole 3 of rotor 2 13, the both sides of radial hole 13 are shaped with the narrow groove 14 communicated with radial hole 13, form radial flow path 15, such structure, its objective is the sealing area increasing cut water 5, be conducive to improving volumetric efficiency and head pressure.

Bearing in the present embodiment can adopt plastic bearing or stainless steel bearing or ceramic bearing, to adapt to the needs of different medium.

When submersible motor 8 drives standard shaft 6 to rotate, eccentric wheel 6 promotes piston 4 makes rotor 2 rotate, at this moment piston 4 is while rotate around standard shaft 6, radial direction through hole 3 on one edge rotor 2 is reciprocating, the to-and-fro motion of piston 4 produces volume-variation, suck liquid from suction chamber and discharge liquid from discharge side again, constantly circulate; Due to the obstruct of cut water 5, make to produce pressure difference between discharge side and suction chamber, form head pressure; The displacement pump principle of this volume-variation, hydraulic loss and volumetric loss are all little, energy-efficient; Piston 4 is double-action work, and rotor often rotates a circle liquor charging twice, and under motor runs up, liquid stream exports steady no pulse, vibrate little, noise is low.

Fig. 4 is the structural drawing of the width of cut water 5 and the equal diameters of piston 4, this is the ideal structure of general classical Theoretical Design, the width design of cut water 5 is become strictly equal with piston 4 diameter, can not wide can not be narrow, wide to produce vexed car and be stranded liquid, narrow zone of high pressure and low pressure area will be made to gang up, liquid backflow, volumetric efficiency declines, and head pressure reduces; But the sealing surface of this structure is minimum, and sealing effect is the poorest, this can confirm from the sealing surface projection drawing of Fig. 5.

Fig. 6 be cut water 5 width with rotor overlap the width of the radial flow path 15 on 12 equal time structural drawing, this designs according to the feature of piston movement " short stroke; high frequency ", because the flow that it is carried each time is little, therefore be fixedly mounted with a rotor cover 12 at the cylindrical of rotor 2, the diameter of radial hole 13 coaxial with the radial direction through hole 3 on rotor 2 on this rotor cover 12 can diminish; In addition, quantity delivered in each stroke turned of piston 4 is also unequal, piston 4 quantity delivered when two limit positions is minimum, then increases gradually, therefore, the narrow groove 14 communicated with it can be shaped with in the both sides of this radial hole 13, form the radial flow path 15 of rotor cover 12, increase sealing area and length, improve sealing effect, increase pressure difference, thus increase head pressure; This is confirmed from the dense front cover projection drawing of Fig. 7.

The structural drawing of Fig. 8 to be the embodiment of the present invention be two row's pistons 4, show two row's pistons in figure, this makes the flow of pump double, and make liquid stream more steady, because standard shaft 6 is dual-supportings, larger radial force can be born, according to demand, three row's pistons can be also designed to.

Claims

1. an efficient small submersible pump, comprise the pump housing (1), be contained in the described pump housing (1) inner chamber and and its coaxial rotor (2), described rotor (2) is shaped with at least one radial direction through hole (3), described radial direction through hole (3) built with piston (4) that can be reciprocating by eccentric stiffener, in the described pump housing (1), is shaped with a pair cut water (5) of being isolated in zone of high pressure and low pressure area; It is characterized in that: the eccentric stiffener that described drive piston (4) is reciprocating is made up of standard shaft (6) and one or more eccentric wheel (7), one end of described standard shaft (6) and the projecting shaft direct connection of submersible motor (8), the other end of described standard shaft (6) passes the eccentric opening (9) of the eccentric wheel (7) of described piston (4) waist, and connects with key (10); The axis of described standard shaft (6) has a throw of eccentric E1 to the pump housing (1) inner chamber axis; The axis of axis to described standard shaft (6) of described eccentric wheel (7) has a throw of eccentric E2.

2. efficient small submersible pump according to claim 1, the value of described throw of eccentric E2 is equal with the value of throw of eccentric E1.

3. efficient small submersible pump according to claim 1, the value of described throw of eccentric E2 is greater than the value of throw of eccentric E1.

4. efficient small submersible pump according to claim 1, the described pump housing (1) inner chamber is fixedly mounted with a coaxial cut water cover (11), described cut water cover (11) is shaped with a pair cut water (5) of being isolated in zone of high pressure and low pressure area.

5. efficient small submersible pump according to claim 1, the cylindrical of described rotor (2) is fixedly mounted with a rotor cover (12), described rotor cover (12) has and the radial hole (13) that the radial direction through hole of rotor (2) (3) is coaxial, diameter is less, the both sides of described radial hole (13) are shaped with the narrow groove (14) communicated, and form the radial flow path (15) of rotor cover (12).

6. efficient small submersible pump according to claim 1, the width of described cut water (5) is equal with the width of the radial flow path (15) of rotor cover (12).