CN103397992B - The intertwining phase place bidirectional ram pump of monocline - Google Patents

Abstract

The intertwining phase place bidirectional ram pump of monocline belongs to controls Hydro-mechanics technical field, and object is to solve prior art and has that flow is little, pulsation is large, the problems such as job insecurity. The present invention includes power transmission shaft, swash plate, housing, left plunger and right plunger; Swash plate is fixed on power transmission shaft by spline, m left plunger and n right plunger circumference uniform distribution are on the left side and right side of swash plate, power transmission shaft, swash plate, left plunger and right plunger entirety are positioned at enclosure interior, left plunger is identical with the diameter of the circumference that right plunger distributes, m left plunger and n right plunger setting angle differ the work period half, motor drives described swash plate to rotate by described power transmission shaft, and then drives described left plunger and right plunger work. The present invention uses the monocline right plunger symmetrical structure of facing left, and reduces plunger displacement pump axial force, improves operating accuracy, the plunger misphase position half period design of swash plate both sides, and simultaneously working, and instantaneous delivery doubles, and flow pulsation reduces to original 1/4th.

Description

The intertwining phase place bidirectional ram pump of monocline

Technical field

The invention belongs to and control Hydro-mechanics technical field, be specifically related to the intertwining Phase Double of a kind of monocline toPlunger displacement pump.

Background technology

Hydraulic pump is energy conversion elements, the mechanical energy of motor is changed into the hydraulic energy of fluid, is that hydraulic pressure passesThe key link of moving system, directly affects the performance of whole machine and the stability of work. Traditional hydraulic pressureWhen pump is normally worked, because its flow pulsation is large and operating pressure unstability, can produce the work of machineMany harmful effects, cause fluid conduit failure, cause that Hydraulic Elements are destroyed, ineffective or work essenceSpend not high, thereby cause that the irregular vibration of each several part original paper in installations produces noise.

Publication number is that to disclose a denomination of invention be Double swashplate two-way flow axial columns to the Chinese patent of CN2247728The technical scheme of plug pump, this plunger displacement pump comprises power transmission shaft, pump case, swash plate, bimetallic plates and upper and lower plungerPump composition, upper and lower plunger displacement pump is arranged on the upper/lower terminal of pump case, and bimetallic plates are arranged among pump case,Swash plate is arranged on power transmission shaft, and power transmission shaft is arranged on the centre of pump case and upper and lower plunger displacement pump, upper and lower plungerPump uses same power transmission shaft connection for transmission. This plunger displacement pump is equivalent to two axial plunger pumps to be installed togetherWork simultaneously, although increased the instantaneous working flow of product, improved operating pressure, the stream of plunger displacement pumpAmount pulsation does not have substantial variation.

Summary of the invention

The object of the invention is to propose the intertwining phase place bidirectional ram pump of a kind of monocline, solve prior art and existFlow is little, pulsation is large, and the problems such as job insecurity reduce and avoid each element in whole hydraulic system to do weekThe vibration of phase property, creep, noise.

For achieving the above object, the intertwining phase place bidirectional ram pump of monocline of the present invention comprise power transmission shaft, swash plate,Housing, left plunger and right plunger; Described swash plate is fixed on described power transmission shaft by spline, and described m leftPlunger and described n right plunger circumference uniform distribution on the left side and right side of described swash plate, described power transmission shaft,Swash plate, left plunger and right plunger entirety are positioned at described enclosure interior, the circle that described left plunger and right plunger distributeThe diameter in week is identical, and described m left plunger and n right plunger setting angle differ work period, electricity halfMachine drives described swash plate to rotate by described power transmission shaft, and then drives described left plunger and right plunger work.

Described plunger displacement pump also comprises left oil-out, left oil inleting port, left filling valve, left gap hydraulic fluid port, right fuel-displacedMouth, right oil-in, right filling valve and right end clearance hydraulic fluid port; Described left oil-out and described right oil-out are respectivelyBe communicated with left bank oil pocket and right oil-discharging cavity, described left oil inleting port and described right oil-in respectively with described left oil suctionChamber and right oil sucting cavity are communicated with; Described left filling valve is connected with left plunger and right plunger respectively with described right filling valve,Described housing top has described left gap hydraulic fluid port and right end clearance hydraulic fluid port.

The number m of described left plunger and the number n of described right plunger equate, the span of described m and nFor: m >=6, n >=6.

Described swash plate is provided with dead eye and piston shoes hole, and the dead eye of described swash plate is by bearing and described housingConnect, described left plunger and described right plunger coordinate with described piston shoes hole respectively.

Beneficial effect of the present invention is: compared with prior art, and the intertwining phase place bidirectional ram of monocline of the present inventionPump has improved traditional plunger pump structure, uses the monocline right plunger symmetrical structure of facing left, the plunger of swash plate both sidesThe half period design of misphase position, and work, instantaneous delivery doubles, and it is original that flow pulsation reduces to. simultaneously1/4th, due to the reverse axial force of interacting, therefore reduce plunger displacement pump axial force, raising workPrecision; Monocline dish duplex plunger pump of the present invention has been realized left and right and has jointly been worked for twice, completes oil suction oil extraction, andTraditional plunger displacement pump is compared, and the plunger that has been equivalent to increase by a times is realized reciprocating motion, has increased work cavity volume,Rated pressure doubles, and has solved traditional little problem of plunger displacement pump pressure; The intertwining phase place two-way column of monoclinePlug pump adopts the obliquity structures such as left and right sides plunger and valve plate, and the installation of plunger and operating angle simultaneouslyDiffer half period, the pulsating quantity of the air-quantity chart gained of plunger displacement pump is reduced to 1/4 of common plunger displacement pump,Reduce and avoid each element in whole hydraulic system to do periodically vibration, improving operating accuracy.

Brief description of the drawings

Fig. 1 is the intertwining phase place bidirectional ram pump of monocline of the present invention overall structure installation diagram;

Fig. 2 is the plunger motion sketch of plunger displacement pump of the present invention;

Fig. 3 is that the pipeline of plunger displacement pump of the present invention connects sketch;

Fig. 4 is the oblique disk structure figure in plunger displacement pump of the present invention;

Fig. 5 is the A-A cutaway view of Fig. 2;

Fig. 6 is the B-B cutaway view of Fig. 2;

Fig. 7 is single plunger displacement pump air-quantity chart figure;

Fig. 8 is the intertwining phase place bidirectional ram pump of monocline instantaneous delivery simulation curve figure;

Wherein: 1, right oil-out, 2, right filling valve, 3, right plunger, 4, right end clearance hydraulic fluid port, 5, swash plate,6, left gap hydraulic fluid port, 7, left plunger, 8, left filling valve, 9, left oil-out, 10, left oil inleting port, 11,Bearing, 12, right oil-in, 13, right filling valve, 14, power transmission shaft, 15, total oil-discharging cavity, 16, left bankOil pocket, 17, left oil sucting cavity, 18, total oil sucting cavity, 19, pipeline A, 20, right oil sucting cavity, 21, right rowOil pocket, 22, pipeline B, 23, dead eye, 24, piston shoes hole, 25, left side plunger ports, 26, right side plungerMouthful.

Detailed description of the invention

Below in conjunction with accompanying drawing, the present invention is described further.

Referring to accompanying drawing 1, accompanying drawing 2, accompanying drawing 3, accompanying drawing 5 and accompanying drawing 6, the intertwining Phase Double of monocline of the present inventionComprise power transmission shaft 14, swash plate 5, housing, left plunger 7 and right plunger 3 to plunger displacement pump; Described swash plate 5 passes throughSpline is fixed on described power transmission shaft 14, described 6 left plungers 7 and described 6 right plunger 3 circumference uniform distributionsOn the left side and right side of described swash plate 5, described power transmission shaft 14, swash plate 5, left plunger 7 and right postFill in 3 entirety and be positioned at described enclosure interior, the diameter of the circumference that described left plunger 7 distributes with right plunger 3 is identical,Described m left plunger 7 and n right plunger 3 setting angles differ the work period half, described in motor passes throughPower transmission shaft 14 drives described swash plate 5 to rotate, and then drives described left plunger 7 and right plunger 3 to work.

Described plunger displacement pump also comprise left oil-out 9, left oil inleting port 10, left filling valve 8, left gap hydraulic fluid port 6,Right oil-out 1, right oil-in 12, right filling valve 2,13 and right end clearance hydraulic fluid port 4; Described left plunger 7 and the right sidePlunger 3 communicates with top by axial hole, radial hole, the head of described left plunger 7 and described right plunger 3On the face of cylinder, cut skewed slot, changed fuel delivery per cycle; On plunger bushing, be shaped with into, spill port, all with the pump housing inHigh and low pressure oil pocket communicate, left oil-out 9 as herein described and described right oil-out 1 respectively with left bank oilChamber 16 and right oil-discharging cavity 21 are communicated with.

Left filling valve 8 and right filling valve the 2, the 13rd, a kind of check valve, in the time acting on spring pressure, on valvePortion's taper seat contacts with valve seat sealing, and its effect is in the time of fuel cut-off, and high-pressure oil pipe and plunger upper end are heldChamber is isolated, prevents that the oil in high-pressure oil pipe from blowing back in injection pump. The bottom of inlet valve is cross section, bothCan lead, can make again diesel oil pass through. Under the conical surface of delivery valve, there is a little face of cylinder, be called decompression endless belt,Its effect is at fuel feeding at the end, and the oil pressure in high-pressure oil pipe is declined rapidly, avoids spray orifice to produce oil drippingPhenomenon. In endless belt falls into valve seat time, make top volume increase fast, pressure reduces rapidly, and stop-spraying is rapid.Described left filling valve 8 is connected with left plunger 7 and right plunger 3 respectively with described right filling valve 2,13, described inHousing top has described left gap hydraulic fluid port 6 and right end clearance hydraulic fluid port 4.

Referring to accompanying drawing 4, described swash plate 5 is provided with dead eye 23 and piston shoes hole 24, the bearing of described swash plate 5Hole 23 is connected with described housing by bearing 11, described left plunger 7 and described right plunger 3 respectively with described inPiston shoes hole 24 coordinates.

Monocline dish double plunger misphase position hydraulic pump overall structure adopt the swash plate 5 at an inclination angle such as two-sided complete withPiston valving work, the left plunger 7 of swash plate 5 left and right sides and right plunger 3 move back and forth jointly, simultaneously completeBecome oil suction and oil extraction work separately. Therefore pipeline when, monocline dish double plunger misphase position hydraulic pump is normally workedConnect as shown in Figure 3: left oil sucting cavity 17 and the right oil suction of the swash plate 5 left plungers 7 in the left and right sides and right plunger 3Chamber 20 use pipeline A19 are connected to form total oil sucting cavity 18, the swash plate 5 left plunger 7 in the left and right sides and right plungers 3Left bank oil pocket 16 and right oil-discharging cavity 21 use pipeline B22 be connected to form total oil-discharging cavity 15, and right side plunger portsThe operating angle that 26 operating angles of installing and left side plunger ports 25 are installed differs the half in plunger motion cycle,Ensure the stack of both sides flow curve in the time of Wave crest and wave trough, reduce flow pulsation.

Motor drives power transmission shaft 14 to drive the two-sided inclination angle swash plate 5 that waits to rotate, and left and right sides plunger is transported simultaneously back and forthMoving, realize oil suction oil extraction work, the plunger that is simultaneously distributed in swash plate 5 circumference does cycle movement, motion weekPhase isWherein z represents number of plungers.

The inclination angle symmetrical structures such as described swash plate 5 employings, object is to make left and right sides work piston valving condition phaseWith, make its working environment identical.

The intertwining phase place bidirectional ram pump of monocline operation principle is as follows: motor drives power transmission shaft 14 to drive swash plate 5 to doCircumference rotatablely moves, and the left and right plunger 3 being in contact with it does linear reciprocating motion simultaneously, when first plunger doesWhen compression movement, volume diminishes, and it is large that pressure becomes, and fluid is discharged by right oil drain out and left oil-out 9, realExisting oil extraction process. In the time that first plunger does stretching exercise, it is large that volume becomes, and pressure diminishes, and fluid is by rightOil-in 12 and left oil inleting port 10 suck, and realize oil-absorbing process. Left plunger 7 is for being distributed in swash plate 5 left sidesThe plunger at circumference top, and right plunger 3 is the plungers that are distributed in swash plate 5 circumference tops, right side, both sides plungerSetting angle differs the work period half, but works simultaneously, ensures the additivity of flow curve.

The intertwining phase place bidirectional ram pump of monocline increases operating pressure, reduces the principle of flow pulsation: single plungerWhen work, producing air-quantity chart is periodicity trigonometric function curve, when two plungers are worked jointly, producesThe curve of instantaneous delivery is equivalent to two periodically trigonometric function curve combinings, will when therefore two plungers combineThe stagger angle of half period of the work phase angle of two plungers, its geometric meaning is three of two same waveformThe stagger phase place of half period of angle function curve superposes, and amplitude doubles, and amplitude variable quantity reduces four/ mono-.

If pressure, flow and instantaneous delivery that left plunger 7 and right plunger 3 produce are respectively p₁、p₂、Q₁、Q₂、(Q_sh)₁、(Q_sh)₂, pressure, flow and the instantaneous delivery of the intertwining phase place bidirectional ram pump of monocline be p, Q,Σ(Q_sh), there is formula (1):

$\left\{\begin{array}{c}{p}_1=p_2\\ Q_1=Q_2\\ Q=Q_1+Q_2\\ \mathrm{\Σ}\left(Q_{\mathrm{sh}}\right)={\left(Q_{\mathrm{sh}}\right)}_1+{\left(Q_{\mathrm{sh}}\right)}_2\end{array}\right.---\left(1\right)$

In the time that the plunger of the left and right sides is even number: the corner when establishing left plunger 7 and right plunger 3 and working is respectivelyDue toRepresent the work period of single plunger, therefore the work phase angle of left and right plunger 3 differsHalf period,The operating angle lagging behind with respect to left plunger 7 for right plunger 3.

Instantaneous delivery (Q_sh)₁(Q_sh)₂Shown in formula (2) and formula (3):

Wherein,For the performance parameter of product, becauseFall behindInAngle, to realize?Should meet the operating angle shown in formula (4):

Through mathematical formulae (1), formula (2), formula (3) and formula (4) derive draw formula (5) andΣ (Q shown in formula (6)_sh)_maxAnd Σ (Q_sh)_min：

$\mathrm{\Σ}{\left(Q_{\mathrm{sh}}\right)}_{\max }=k\frac{2\cos \frac{\mathrm{\π}}{2z}}{\sin \frac{\mathrm{\π}}{z}}---\left(5\right)$

$\mathrm{\Σ}{\left(Q_{\mathrm{sh}}\right)}_{\min }=k\frac{2\cos \frac{\mathrm{\π}}{2z}\cos \frac{\mathrm{\π}}{2z}}{\sin \frac{\mathrm{\π}}{z}}---\left(6\right)$

Formula (7) is instability of flow property coefficient:

$\mathrm{\δ}=\frac{\mathrm{\Σ}{\left(Q\right)}_{\max }-\mathrm{\Σ}{\left(Q\right)}_{\min }}{{\left(Q_t\right)}_1+{\left(Q_t\right)}_2}=\frac{k\tan \frac{\mathrm{\π}}{4z}}{2Q_t}=\frac{\mathrm{\π}}{2z}\tan \frac{\mathrm{\π}}{4z}---\left(7\right)$

Wherein, Q_tRepresent plunger displacement pump average discharge, k is particular product performance parameters, and Q is plunger displacement pump instantaneous delivery,Z is the intertwining phase place of monocline to the number of plunger being installed in plunger displacement pump.

The flow pulsation coefficient of the intertwining phase place bidirectional ram pump of monocline flow pulsation coefficient and common plunger displacement pump is businessObtain formula (8):

Wherein: z represents that the intertwining phase place of monocline is to the number of plunger being installed in plunger displacement pump, due to z >=1, the equation right sideLimit exists a maximum to beTherefore the flow pulsation coefficient of the intertwining phase place bidirectional ram pump of monocline is to the maximum general1/4th of the flow pulsation of logical plunger displacement pump.

In like manner, in the time that the plunger quantity in the intertwining phase place bidirectional ram pump of monocline is odd number; Its flow pulsationDerivation is the same. Conclusion: the intertwining phase place bidirectional ram pump of monocline flow pulsation coefficient and common plunger displacement pumpFlow pulsation coefficient is business and obtains formula (9):

In formula, z represents to install in the intertwining phase place bidirectional ram pump of monocline the number of plunger, due to z >=1, and equationThe right exists a maximum to beTherefore the flow pulsation coefficient of the intertwining phase place bidirectional ram pump of monocline is to the maximum1/4th of the flow pulsation of common plunger displacement pump.

Monocline dish double plunger misphase in this paper position axial plunger pump, through theory analysis and Practical Calculation,The instantaneous delivery of its pump equals two times of common plunger displacement pump flow, and ripple factor reduces, and pulsation rate is to the maximum1/4 of conventional pump. The instantaneous delivery unstability operating pressure large, that produce that has solved conventional hydraulic pumps can notMeet machine demand, operating pressure is difficult to stable problem, reduce and avoid each several part in whole installationsElement is done the vibration of erratic behavior and the noise that causes. Research to hydraulic pump product and hydraulicdriven machineThere is using value.

Referring to accompanying drawing 7, the air-quantity chart that driving ram pump produces is periodicity trigonometric function curve, due toThe plunger of the hydraulic pump left and right sides, monocline dish double plunger misphase position carries out oil suction oil extraction work, therefore its wink simultaneouslyTime flow curve to be equivalent to two amplitudes identical, the trigonometric function curve combining that the cycle is the same, again because left and rightThe operating angle of both sides plunger differs the half in single plunger motion cycle, therefore the intertwining phase place two-way column of monoclineThe geometric meaning of plug pump air-quantity chart is two duplicate trigonometric function curves half period phases that staggerThe curve that position (the Wave crest and wave trough of two periodicity curves superposes mutually) produces. Its amplitude superposes mutually,Amplitude variable quantity is folded subtracting mutually.

Referring to accompanying drawing 8, represent the intertwining phase place bidirectional ram pump of monocline instantaneous delivery simulation curve figure, a represents postPlug number be the 6 o'clock intertwining phase place bidirectional ram pump of monocline air-quantity charts, b represent number of plungers be 6 o'clock generalLogical pump instantaneous delivery dotted line, the intertwining phase place bidirectional ram pump of monocline flow doubles as seen from the figure, flow arteries and veinsMoving 1/4 of the conventional pump that is reduced to.

Be more than the specific embodiment of the present invention, but limitation of the present invention absolutely not.

Claims (4)

1. the intertwining phase place bidirectional ram pump of monocline, is characterized in that, comprise power transmission shaft (14), swash plate (5),Housing, left plunger (7) and right plunger (3); Described swash plate (5) is fixed on described power transmission shaft by spline(14) upper, m described left plunger (7) and n described right plunger (3) circumference uniform distribution are at described swash plate(5) on left side and right side, described power transmission shaft (14), swash plate (5), left plunger (7) and right postPlug (3) entirety is positioned at described enclosure interior, the circumference that described left plunger (7) and right plunger (3) distributeDiameter is identical, and m described left plunger (7) and n right plunger (3) setting angle differ work week halfPhase, motor drives described swash plate (5) to rotate by described power transmission shaft (14), and then drives described left plungerAnd right plunger (3) work (7).

2. the intertwining phase place bidirectional ram pump of monocline according to claim 1, is characterized in that described postPlug pump also comprise left oil-out (9), left oil inleting port (10), left filling valve (8), left gap hydraulic fluid port (6),Right oil-out (1), right oil-in (12), right filling valve (2,13) and right end clearance hydraulic fluid port (4); DescribedLeft oil-out (9) and described right oil-out (1) respectively with left bank oil pocket (16) and right oil-discharging cavity (21)Be communicated with, described left oil inleting port (10) and described right oil-in (12) respectively with left oil sucting cavity (17) and the right sideOil sucting cavity (20) is communicated with; Described left filling valve (8) and described right filling valve (2,13) respectively with left postPlug (7) is connected with right plunger (3), and described housing top has described left gap hydraulic fluid port (6) and right end clearanceHydraulic fluid port (4).

3. the intertwining phase place bidirectional ram pump of monocline according to claim 1, is characterized in that a described left sideThe number n of the number m of plunger (7) and described right plunger (3) equates, the span of described m and nFor: m >=6, n >=6.

4. the intertwining phase place bidirectional ram pump of monocline according to claim 1, is characterized in that, described obliqueDish (5) is provided with dead eye (23) and piston shoes hole (24), and the dead eye (23) of described swash plate (5) is logicalCross bearing (11) and be connected with described housing, described left plunger (7) and described right plunger (3) are respectively and instituteStating piston shoes hole (24) coordinates.