CN105114277A - Radial plunger type valve-free and pulse-free metering pump - Google Patents
Radial plunger type valve-free and pulse-free metering pump Download PDFInfo
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- CN105114277A CN105114277A CN201510585260.4A CN201510585260A CN105114277A CN 105114277 A CN105114277 A CN 105114277A CN 201510585260 A CN201510585260 A CN 201510585260A CN 105114277 A CN105114277 A CN 105114277A
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Abstract
The invention discloses a radial plunger type valve-free and pulse-free metering pump. The radial plunger type valve-free and pulse-free metering pump is mainly composed of a pump body, a rotor, plungers, a baffle tongue and an eccentric wheel. According to the metering pump, the movement principle of an eccentric mechanism is used for achieving the sucking function and the discharging function of the pump; when the rotor is driven by power to rotate, the plungers move back and forth along radial holes in the rotor while rotating around the eccentric wheel under the restraint of the eccentric wheel, and thus the volume is changed; a pressure difference is generated between a discharging cavity and a suction cavity through the isolation of the baffle tongue, and by the adoption of the positive displacement pump principle, both hydraulic loss and volume loss are small, the efficiency is high, and the self-suction capacity is high; after a valve structure is omitted, the pump can work at a high speed; the multiple plungers which are evenly distributed are used for conveying alternately and continuously, output flow is smooth and free of pulses, vibration is small, and noise is low. The radial plunger type valve-free and pulse-free metering pump belongs to positive displacement pumps, the delivery quantity of each stroke of each plunger is fixed due to the fact that liquid cannot be compressed, and thus the delivery quantity of the pump in unit time is basically fixed, and the purpose of accurate metering is realized.
Description
Technical field
The present invention relates to a kind of displacement pump, particularly a kind of radial plunger type valveless Pulseless metering pump.
Background technique
Metering pump forms primarily of fluid end and power end, and fluid end is a reciprocating plunger and import one-way valve, Outlet check valves composition mainly, be Leakage prevention sometimes, also has employing plunger to add the structure of elastic diaphragm; Its effect of power end provides reciprocating power to plunger, and this power has: electromagnetic force, hydraulic coupling, mechanical force etc.; Electromagnetic force is less due to power, is difficult to obtain large flow and pressure; Hydraulic coupling needs hydraulic power supply and hydraulic system, and overall structure is comparatively complicated, and floor space is large, have impact on its using scope; The power comparatively generally adopted is mechanical force, for making plunger reciprocating, and general employing connecting rod or eccentric machinery.Which kind of power no matter metering pump adopt, because fluid end has import one-way valve and Outlet check valves, certainly exist the retardation phenomenon of valve, when plunger is in suction stroke end of a period return, suction valve does not cut out in time, partially liq gets back to suction pipe from fluid cylinder, equally, when discharging stroke end of a period return, expulsion valve does not cut out in time, and partially liq is got back to liquid cylinder from discharge tube through expulsion valve, the retardation phenomenon of Here it is valve, reciprocal time, all below 200 times, can not reach the speed up of 550 times per minute, and use is subject to a definite limitation; If raising reciprocal time, retardation phenomenon shows even more serious, even produces the unsettled phenomenon of valve block; In order to ensure that measuring accuracy generally adopts low reciprocal time, about more than 100 times per minute, this just must make the raw pulsation of liquid miscarriage, and with vibration and noise; In order to avoid bringing bad reaction to production procedure, the accumulator of enough capacity be had to be balanced, the major defect of current metering pump existence that Here it is.
Application number is 200710025082.5, name is called that " flow is adjustable pulsating movement free high precision elastic diaphragm metering pump " and application number are 200910101694.7, name is called in " Pulseless metering pump " two patent applications the measure being proposed and solving fluid pulse, mainly increases the quantity of plunger; The former proposes the structure of five plungers, and the latter proposes double-plunger and adds archimedes curve eccentric wheel structure, but both still remain valve arrangement, and therefore, the reciprocal time of pump is still very low, pulses still inevitable.
Summary of the invention
The object of the invention is to: for the shortcoming of the pulsation that existing metering pump exists, propose a kind of cancellation valve arrangement, speed up, multiplunger rotator type valveless Pulseless metering pump.
In order to achieve the above object, radial plunger type valveless Pulseless metering pump of the present invention, comprise the pump housing 1 with suction port and exhaust port, the described pump housing 1 inner chamber is equipped with coaxial rotor 2, this rotor 2 has multiple uniform radial hole 3, described radial hole 3 built with can be reciprocating plunger 4, the described pump housing 1 inner chamber is shaped with the cut water 5 pump housing 1 inner chamber being divided into zone of high pressure and low pressure area, and its special way is: the described pump housing 1 inner chamber is also equipped with an eccentric wheel maintained static 6; The inner of described plunger 4 is close on the periphery of eccentric wheel 6 in the presence of a tensile force.
The inner chamber of the pump housing 1 described in technical solution of the present invention can be equipped with cut water cover 7, and described cut water cover 7 is shaped with the cut water 5 pump housing 1 inner chamber being divided into zone of high pressure and low pressure area.
The cylindrical of eccentric wheel 6 described in technical solution of the present invention can be fixed with rolling bearing 8.
The cylindrical of rotor 2 described in technical solution of the present invention can be fixedly mounted with a rotor cover 9, this rotor cover 9 corresponds to rotor 2 radial hole 3 position and is shaped with coaxial with radial hole 3 and less than radial hole 3 diameter radial hole 10, these radial hole 10 both sides are shaped with the narrow groove 11 be communicated with it, form the radial passage of rotor cover 9.
The width of cut water 5 described in technical solution of the present invention can equal the width of radial passage on rotor cover 9.
In the radial hole 3 of rotor 2 described in technical solution of the present invention, plunger 4 and elastic diaphragm 12 can be housed.
Rotor 2 described in technical solution of the present invention can be shaped with many rows radial hole 3 of in-built plunger 4 vertically.
The present invention utilizes the motion principle of eccentric stiffener, realize the suction function of pump, when power rotor driven 2 rotates, due to the restriction of eccentric wheel 6, plunger 4 is while rotate around eccentric wheel 6, and the radial hole 3 on an edge rotor 2 is reciprocating, and the to-and-fro motion of plunger 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, and measuring accuracy is high, and efficiency is high, and suction capacity is strong, multiple uniform angled layout of plunger 4, and under motor runs up, liquid stream exports steady no pulse, vibrate little, noise is low.
In order to improve the gap sealed performance of cut water 5, sealing area must be increased; According to " short stroke, high frequency " feature of plunger motion, its reciprocal time is very high, but the flow carried each time is little, and on rotor 2, therefore add a rotor cover 9, on rotor cover 9, the diameter of radial hole 10 can diminish; In addition, quantity delivered in each stroke turned of plunger 4 is also unequal, and plunger quantity delivered when two limit positions is minimum, then increases gradually, therefore, the narrow groove 11 communicated can be made in the both sides of radial hole 10, form less radial passage, pass through to adapt to small flow, thus reach the area increasing cut water sealing surface, strengthen sealing effect, reduce volumetric loss, improve the object of measuring accuracy.
Good effect of the present invention is: eliminate valve arrangement, thus eliminates the retardation phenomenon of valve, and the reciprocal time of pump can bring up to more than 550 times speed ups per minute; Constantly carried in turn by multiple uniform plunger 4, the flow trim pulsating movement free therefore exported; In addition, the invention belongs to displacement pump, the stroke of plunger 4 is twices of eccentric wheel 6 throw of eccentric, due to liquid incompressibility, the quantity delivered of the every one stroke of plunger is fixing, therefore, the quantity delivered of pump within the unit time is fixing substantially, reaches the object of accurate-metering.
Accompanying drawing explanation
Fig. 1 is the structural drawing of embodiments of the invention.
Fig. 2 is the A-A sectional view of Fig. 1.
Fig. 3 is the B-B sectional view of Fig. 1.
Fig. 4 is the structural drawing of plunger 4.
Structural drawing when Fig. 5 is the equal diameters of the width of cut water 5 and plunger 4.
Fig. 6 is the projection drawing of sealing surface in Fig. 5.
Fig. 7 be the width of cut water 5 equal with the radial passage width that rotor overlaps on 9 time structural drawing.
Fig. 8 is the projection drawing of sealing surface in Fig. 7.
Fig. 9 is the structural drawing that plunger 4 adds elastic diaphragm 12.
Figure 10 is the structural drawing of two row's radial holes 3 and plunger 4.
Embodiment
Fig. 1 is the structural drawing of embodiments of the invention, and Fig. 2 is the A-A sectional view of Fig. 1, and Fig. 3 is the B-B sectional view of Fig. 1.
Show the pump housing 1 inner chamber in figure and the rotor 2 coaxial with it, rotor 2 two supports are housed on bearing 18, rotor 2 is shaped with multiple radial hole 3 be evenly arranged, and radial hole 3 is built with can reciprocating plunger 4 by eccentric wheel 6; The pump housing 1 inner chamber is also fixedly mounted with a coaxial cut water cover 7, and cut water cover 7 is shaped with the cut water 5 of being isolated in the zone of high pressure in the pump housing 1 and low pressure area; An eccentric wheel do not turned 6 passes rotor 2 inner chamber and is packed on protecgulum 17, and its other end is bearing on bearing 19, and bearing 19 is arranged on the axis place of rotor 2, and eccentric wheel 6 cylindrical is fixedly mounted with a rolling bearing 8; Plunger 4 is pressed to the surface of the rolling bearing 8 outside eccentric wheel 6 by the plunger 4 in radial hole 3 together with sheath 15 by Compress Spring 14; Rotor 2 projecting shaft side also has bonnet 20 and shaft seal 16.
When power rotor driven 2 rotates, due to the restriction of eccentric wheel 6, plunger 4 is while rotate around eccentric wheel 6, radial hole 3 on one edge rotor 2 is reciprocating, the to-and-fro motion of plunger 4 produces volume-variation, and plunger 4 sucks liquid from low pressure area, discharges liquid to zone of high pressure, cut water 5 between zone of high pressure and low pressure area plays iris action, prevents the liquid of zone of high pressure from flowing to the precision of low pressure area backflow and impact metering.
Fig. 4 is the structural drawing of plunger 4.Each radial hole is built with guide pin bushing 13, plunger 4, Compress Spring 14 and plunger sheath 15.
Structural drawing when Fig. 5 is the equal diameters of the width of cut water 5 and plunger 4, this is the ideal structure of general classical Theoretical Design, and the width design of cut water 5 is become strictly equal with plunger 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. 6.
Fig. 7 be the width of cut water 5 equal with the radial passage width that rotor overlaps on 9 time structural drawing, according to the feature of plunger motion " short stroke; high frequency ", the flow that it is carried each time is little, therefore be fixedly mounted with a rotor cover 9 at the cylindrical of rotor 2, the diameter of radial hole 10 coaxial with the radial hole 3 on rotor 2 on this rotor cover 9 can diminish; In addition, quantity delivered in each stroke turned of plunger 4 is also unequal, plunger 4 quantity delivered when two limit positions is minimum, then increase gradually, therefore, the narrow groove 11 communicated with it can be shaped with in the both sides of this radial hole 10, form the radial flow path of rotor cover 9, increase sealing area and length, this is confirmed from the dense front cover projection drawing of Fig. 8.
Fig. 9 is the structural drawing that plunger 4 adds elastic diaphragm 12, show plunger 4 in figure and be set with an elastic diaphragm 12, with pressing plate 21, elastic diaphragm 12 is packed on rotor 2, elastic diaphragm 12, be pre-stretching when mounted, therefore, plunger 4 is at elastic diaphragm 12, elastic force effect under, all the time be close to the surface of the rolling bearing 8 outside eccentric wheel 6, elastic diaphragm 12, can make of rubber or elastomeric plastics.
Figure 10 is the structural drawing of two row's radial holes 3 and plunger 4, and many row's radial holes and plunger (as two rows, three rows) can make pump when not affecting measuring accuracy, flow be doubled.
Claims (7)
1. a radial plunger type valveless Pulseless metering pump, comprise the pump housing (1) with suction port and exhaust port, the described pump housing (1) inner chamber is equipped with coaxial rotor (2), this rotor (2) has multiple uniform radial hole (3), described radial hole (3) built with can be reciprocating plunger (4), the described pump housing (1) inner chamber is shaped with the cut water (5) pump housing (1) inner chamber being divided into zone of high pressure and low pressure area, it is characterized in that: the described pump housing (1) inner chamber is also equipped with an eccentric wheel maintained static (6); The inner of described plunger (4) is close on the periphery of eccentric wheel (6) in the presence of a tensile force.
2. radial plunger type valveless Pulseless metering pump according to claim 1, it is characterized in that: the described pump housing (1) inner chamber is equipped with cut water cover (7), described cut water cover (7) is shaped with the cut water (5) pump housing (1) inner chamber being divided into zone of high pressure and low pressure area.
3. radial plunger type valveless Pulseless metering pump according to claim 1 and 2, is characterized in that: the cylindrical of described eccentric wheel (6) is fixed with rolling bearing (8).
4. radial plunger type valveless Pulseless metering pump according to claim 1 and 2, it is characterized in that the outer garden of described rotor (2) is fixedly mounted with a rotor cover (9), this rotor cover (9) is shaped with the radial hole (10) coaxial and less than radial hole (3) diameter with radial hole (3) corresponding to rotor (2) radial hole (3) position, this radial hole (10) both sides are shaped with the narrow groove (11) be communicated with it, form the radial passage of rotor cover (9).
5. radial plunger type valveless Pulseless metering pump according to claim 4, is characterized in that: the width of described cut water (5) equals the width of the upper radial passage of rotor cover (9).
6. radial plunger type valveless Pulseless metering pump according to claim 1, is characterized in that: the radial hole (3) of described rotor (2) is built with plunger (4) and elastic diaphragm (12).
7. radial plunger type valveless Pulseless metering pump according to claim 1, is characterized in that: described rotor (2) is shaped with many rows radial hole (3) of in-built plunger (4) vertically.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510585260.4A CN105114277A (en) | 2015-09-11 | 2015-09-11 | Radial plunger type valve-free and pulse-free metering pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510585260.4A CN105114277A (en) | 2015-09-11 | 2015-09-11 | Radial plunger type valve-free and pulse-free metering pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105114277A true CN105114277A (en) | 2015-12-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510585260.4A Pending CN105114277A (en) | 2015-09-11 | 2015-09-11 | Radial plunger type valve-free and pulse-free metering pump |
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| CN (1) | CN105114277A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106246537A (en) * | 2016-08-25 | 2016-12-21 | 陈兆红 | Associated mode vane pump |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62251475A (en) * | 1986-04-24 | 1987-11-02 | Toyota Motor Corp | Fixed displacement pump |
| CN101865100A (en) * | 2010-06-23 | 2010-10-20 | 余文凌 | Multi-cylinder radial piston pump |
| DE102009054876A1 (en) * | 2009-12-17 | 2011-06-22 | ZF Friedrichshafen AG, 88046 | Method for determining the absorption volume of a radial piston machine |
| CN103233873A (en) * | 2013-04-18 | 2013-08-07 | 西安交通大学 | External-rotor radial plunger hydraulic pump integrated with motors |
| CN104179659A (en) * | 2014-08-11 | 2014-12-03 | 宁波泰源工量具有限公司 | Air pump with multiple cylinder bodies |
| CN104329232A (en) * | 2014-09-03 | 2015-02-04 | 西安交通大学 | Integrated radial plunger pump driven by permanent magnet disc type electric machines |
| CN204283774U (en) * | 2014-10-22 | 2015-04-22 | 宁波市北仑鑫星双赢金属材料有限公司 | A kind of multi plungerpump core assembly |
-
2015
- 2015-09-11 CN CN201510585260.4A patent/CN105114277A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62251475A (en) * | 1986-04-24 | 1987-11-02 | Toyota Motor Corp | Fixed displacement pump |
| DE102009054876A1 (en) * | 2009-12-17 | 2011-06-22 | ZF Friedrichshafen AG, 88046 | Method for determining the absorption volume of a radial piston machine |
| CN101865100A (en) * | 2010-06-23 | 2010-10-20 | 余文凌 | Multi-cylinder radial piston pump |
| CN103233873A (en) * | 2013-04-18 | 2013-08-07 | 西安交通大学 | External-rotor radial plunger hydraulic pump integrated with motors |
| CN104179659A (en) * | 2014-08-11 | 2014-12-03 | 宁波泰源工量具有限公司 | Air pump with multiple cylinder bodies |
| CN104329232A (en) * | 2014-09-03 | 2015-02-04 | 西安交通大学 | Integrated radial plunger pump driven by permanent magnet disc type electric machines |
| CN204283774U (en) * | 2014-10-22 | 2015-04-22 | 宁波市北仑鑫星双赢金属材料有限公司 | A kind of multi plungerpump core assembly |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106246537A (en) * | 2016-08-25 | 2016-12-21 | 陈兆红 | Associated mode vane pump |
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Application publication date: 20151202 |