CN103883520A

CN103883520A - Rotor type immersible pump with eccentric shaft directly connected with motor

Info

Publication number: CN103883520A
Application number: CN201410122748.9A
Authority: CN
Inventors: 余文凌
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-03-27
Filing date: 2014-03-27
Publication date: 2014-06-25
Anticipated expiration: 2034-03-27
Also published as: CN103883520B

Abstract

The invention discloses a rotor type immersible pump with an eccentric shaft directly connected with a motor and the rotor type immersible pump is applicable to work under liquids. The rotor type immersible pump comprises a pump body, a rotor, a piston, the eccentric shaft, a pump seat and a submersible motor. According to the eccentric mechanism principle, the piston reciprocates; the eccentric shaft is directly arranged on a projecting shaft of the submersible motor; when the eccentric shaft is driven to rotate by the motor, the piston rotates around the eccentric shaft while reciprocating, so that liquid is sucked and discharged. Due to high-speed running, the piston conveys liquid twice when the rotor rotates for every turn and consequently the liquid flow is outputted steadily with no pulse, small vibration and low noise; besides, the rotor type immersible pump with a small size, a few parts, low cost, small hydraulic loss and small volume loss has efficiency of over 70% and remarkable energy-saving effect, and is an upgraded high-efficiency energy-saving product of a centrifugal immersible pump. In addition, the rotor type immersible pump has the good self-pumping performance of a displacement pump, thereby being capable of not only conveying water type liquids, but also pumping viscous liquids such as oils as well as gas-containing liquids; the application range of the rotor type immersible pump is expanded.

Description

The rotor-type submersible pump of eccentric shaft and motor direct connection

Technical field

The present invention relates to a kind of displacement pump, be particularly applicable to the eccentric shaft of operation under liquid and the rotor-type submersible pump of motor direct connection.

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-sized centrifugal submersible pumps efficiency is extremely low, the efficiency of for example 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 that is pump of tracing it to its cause is little, concerning centrifugal pump, specific speed is little, efficiency is low is an intrinsic fatal shortcoming, the difficult problem that all cannot overcome so far, in addition the impeller outlet width of small-sized centrifugal submersible pumps is little, and casting manufacturability is poor, the blade path rough surface in impeller, and easily by obstructions such as pasture and water, snail shell, impurity, easy motor damage when 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 generally 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, I am for the shortcoming of above-mentioned centrifugal and submersible pump and the existence of other submersible pumps, propose that a kind of volume is little, simple in structure, 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.

Existing small-sized centrifugal submersible pumps price is very cheap, but the electricity charge that monthly pay are very high; The advantage of rotor-type submersible pump is that the low efficiency of small-sized centrifugal submersible pumps is brought up to 70%, 80% by 15%, 20% quickly, and power savings is very obvious, and user can save a large amount of electricity charge, meanwhile, meets the industrial policy of energy-saving and emission-reduction.

Summary of the invention

The object of the invention is to: provide a kind of technical conceive different technological schemes, made its energy-saving effect can reach the level of existing rotor-type submersible pump; And it is more compact in structure.

In order to achieve the above object, the rotor-type submersible pump of eccentric shaft of the present invention and motor direct connection, comprise with the pump housing 1 of suction port and exhaust port, be contained in the described pump housing 1 inner chamber and and its coaxial rotor 2, described rotor 2 be shaped with at least one row's radial direction through hole 3, in described radial direction through hole 3, be equipped with can be reciprocating by eccentric stiffener piston 4; The cylindrical of described rotor 2 is fixedly mounted with a rotor cover 5, on described rotor cover 5, has the radial hole 6 that the diameter coaxial with the radial direction through hole 3 of rotor 2 is less, and the both sides of described radial hole 6 are shaped with the narrow groove 7 communicating with radial hole 6, form radial flow path; The described pump housing 1 inner chamber is also equipped with coaxial cut water cover 8, on described cut water cover 8, be shaped with the cut water 9 of the zone of high pressure in the pump housing 1 and low pressure area isolation, its special way is: the reciprocating eccentric shaft 10 of described drive piston 4 is made up of standard shaft section 11 and eccentric segment 12, the standard shaft section 11 of described eccentric shaft 10 and the projecting shaft direct connection of submersible motor 13; The eccentric segment 12 of described eccentric shaft 10 inserts in the inner sleeve of rolling bearing 14 of described piston 4 waists and is affixed with it; The axis of the standard shaft section 11 of described eccentric shaft 10 has a throw of eccentric E to the pump housing 1 inner chamber axis; The axis of the standard shaft section 11 of the axis of the eccentric segment 12 of described eccentric shaft 10 to described eccentric shaft 10 has an identical throw of eccentric E.

The present invention utilizes the motion principle of eccentric stiffener, realize the suction function of pump, as shown in Figure 1, in the time that submersible motor 13 drives eccentric shaft 10 to rotate, the radial direction through hole that piston 4 rotates on an edge rotor 2 on one side around eccentric shaft 10 does relatively reciprocating motion, and reciprocating stroke is 4 times of throw of eccentric of eccentric shaft, the to-and-fro motion generation volume-variation of piston 4, suck liquid from suction chamber and discharge liquid from discharge side again, constantly circulation; Due to the obstruct of cut water 9 on cut water cover 8, make to produce pressure difference between discharge side and suction chamber; The displacement pump principle of this volume-variation, hydraulic loss and volumetric loss are all little, efficiency is very high, piston 4 is double-action work, the rotor liquor charging twice that often rotates a circle, under motor runs up, the steady no pulse of liquid stream output, vibrate little, noise is low.

Compared with " rotor-type submersible pump " that be 201010202658.2 with the patent No., the present invention has following advantages:

The 1st, cancel the eccentric shaft on pump seat in " rotor-type submersible pump ", the axial dimension of whole pump is dwindled, structure is more compact.

The 2nd, the eccentric segment 12 of eccentric shaft 10 inserts in the inner sleeve of rolling bearing 14 and is affixed with it, and eccentric segment 12 does not does not wear and tear, and has reduced friction and heating, has also reduced power consumpiton.

The 3rd, the axis of the standard shaft section 11 of eccentric shaft 10 has a throw of eccentric E to the pump housing 1 inner chamber axis, the axis of the standard shaft section 11 of the axis of the eccentric segment 12 of eccentric shaft 10 to described eccentric shaft 10 has an identical throw of eccentric E, the value of two throw of eccentric equates, consequently submersible motor 13 drives eccentric shaft 10 to rotate a circle, and 2 of rotors turn half cycle, the rotating speed that is rotor 2 is the half of submersible motor 13 rotating speeds, and this is conducive to extend the life-span of piston ring.

Good effect of the present invention is; Energy-efficient, hydraulic loss is little, volumetric efficiency is high, and total efficiency can reach more than 70%, belongs to energy-efficient product; Structure is more simple compact; The rotating speed of rotor is the half of submersible motor rotating speed, extends the life-span of piston ring.

Brief description of the drawings

Fig. 1 is embodiment of the present invention structural drawing.

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

Fig. 3 is the B-B sectional view of Fig. 1.

Embodiment

Fig. 1 is embodiment of the present invention structural drawing, and Fig. 2 is the A-A sectional view of Fig. 1, and Fig. 3 is the B-B sectional view of Fig. 1.

In figure, show, the rotor-type submersible pump of eccentric shaft and motor direct connection includes 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 supported by two rolling bearings 15, on rotor 2, be shaped with at least one row's radial direction through hole 3, in radial direction through hole 3, be equipped with by the reciprocating piston 4 of eccentric stiffener energy; The cylindrical of rotor 2 is fixedly mounted with a rotor cover 5, on rotor cover 5, have the radial hole 6 that the diameter coaxial with the radial direction through hole 3 of rotor 2 is less, the both sides of radial hole 6 are shaped with the narrow groove 7 communicating with radial hole 6, form radial flow path, such structure, its objective is the sealing area that increases cut water 9, be conducive to improve volumetric efficiency and head pressure; The pump housing 1 inner chamber is also equipped with coaxial cut water cover 8, is shaped with the cut water 9 of the zone of high pressure in the pump housing 1 and low pressure area isolation on cut water cover 8; Drive the reciprocating eccentric shaft 10 of piston 4 to be formed by standard shaft section 11 and eccentric segment 12, the projecting shaft direct connection of its standard shaft section 11 and submersible motor 13; Its eccentric segment 12 inserts in the inner sleeve of rolling bearing 14 of piston 4 waists and is affixed with it; The axis of the standard shaft section 11 of eccentric shaft 10 has a throw of eccentric E to the pump housing 1 inner chamber axis.The axis of the standard shaft section 11 of the axis of the eccentric segment 12 of eccentric shaft 10 to eccentric shaft 10 has an identical throw of eccentric E, and two throw of eccentric are equal, and motor turns around, and rotor 2 turns half-turn, and the stroke of piston 4 is 4 times of throw of eccentric E.

In the time that submersible motor 13 drives eccentric shaft 10 to rotate, the eccentric segment 12 of eccentric shaft 10 rotates by rolling bearing 14 rotor drivens 2 of piston 4 waists, and piston 4 rotates while be reciprocating, sucks liquid from suction chamber, discharge liquid from discharge side again, go round and begin again.

Rotor-type submersible pump belongs to displacement pump, has very high efficiency, generally, more than 70%, has obvious power savings, belongs to energy-conserving product.

The present invention except power savings obviously, compact structure, volume is little, wherein many component can adopt engineering plastics, not only can antirust but also weight reduction, can reduce again cost.

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

Claims

1. the rotor-type submersible pump of an eccentric shaft and motor direct connection, comprise with the pump housing (1) of suction port and exhaust port, be contained in the described pump housing (1) inner chamber and and its coaxial rotor (2), described rotor (2) be shaped with at least one row's radial direction through hole (3), in described radial direction through hole (3), be equipped with by the reciprocating piston (4) of eccentric stiffener energy; The cylindrical of described rotor (2) is fixedly mounted with a rotor cover (5), on described rotor cover (5), have and the coaxial less radial hole (6) of diameter of radial direction through hole (3) of rotor (2), the narrow groove (7) that the both sides of described radial hole (6) are shaped with and radial hole (6) communicates, forms radial flow path; The described pump housing (1) inner chamber is also equipped with coaxial cut water cover (8), on described cut water cover (8), be shaped with the cut water (9) of the zone of high pressure in the pump housing (1) and low pressure area isolation, it is characterized in that: the reciprocating eccentric shaft (10) of described drive piston (4) is made up of standard shaft section (11) and eccentric segment (12), the standard shaft section (11) of described eccentric shaft (10) and the projecting shaft direct connection of submersible motor (13); The eccentric segment (12) of described eccentric shaft (10) inserts in the inner sleeve of rolling bearing (14) of described piston (4) waist and is affixed with it; The axis of the standard shaft section (11) of described eccentric shaft (10) has a throw of eccentric E to the pump housing (1) inner chamber axis; The axis of the standard shaft section (11) of the axis of the eccentric segment (12) of described eccentric shaft (10) to described eccentric shaft (10) has an identical throw of eccentric E.