CN203452989U - Single-swash-plate staggered phase bidirectional plunger pump - Google Patents

Abstract

The utility model discloses a single-swash-plate staggered phase bidirectional plunger pump, and belongs to the technical field of control hydraulic hydromechanics. The single-swash-plate staggered phase bidirectional plunger pump solves the problems that flow is small, pulsation is large and working is unstable in the prior art. The single-swash-plate staggered phase bidirectional plunger pump comprises a transmission shaft, a swash plate, a shell, left plungers and right plungers. The swash plate is fixed to the transmission shaft through a spline, the m left plungers and the n right plungers are circumferentially and evenly distributed on the left end face and the right end face of the swash plate, the transmission shaft, the swash plate, the left plungers and the right plungers are integrally arranged inside the shell, the circumference of the m left plungers and the circumference of the n right plungers are the same in diameter, the difference of the installing angles between the m left plungers and the n right plungers is a half of a work cycle, and a motor drives the swash plate to rotate through the transmission shaft, and further drives the left plungers and the right plungers to work. According to the single-swash-plate staggered phase bidirectional plunger pump, the single-swash-plate left-plunger-right-plunger symmetrical structure is adopted, the axial force of the plunger pump is reduced, working accuracy is improved, the staggered phase of the plungers at the two sides of the swash plate is designed to be a half of the cycle, the plungers work at the same time, instantaneous flow is doubled, and flow pulsation is reduced to a quarter of the original flow pulsation.

Description

The intertwining phase place bidirectional ram pump of monocline

Technical field

The utility model belongs to controls Hydro-mechanics technical field, is specifically related to the intertwining phase place bidirectional ram pump of a kind of monocline.

Background technique

Oil hydraulic pump is energy conversion elements, the mechanical energy of motor is changed into the hydraulic energy of fluid, is the key link of Hydraulic Power Transmission System, directly affects the performance of whole machine and the stability of work.When traditional oil hydraulic pump works, because its flow pulsation is large and working pressure unstability, can produce many harmful effects to the work of machine, cause fluid conduit failure, cause that hydraulic element are destroyed, ineffective or operating accuracy is not high, thus cause that the irregular vibration of each several part original paper in installations produces noise.

Publication number is that the Chinese patent of CN2247728 discloses a technological scheme that denomination of invention is Double swashplate two-way flow axial plunger pump, this plunger pump comprises that transmission shaft, pump case, swash plate, bimetallic plates and upper and lower plunger pump form, upper and lower plunger pump is arranged on the upper/lower terminal of pump case, bimetallic plates are arranged among pump case, swash plate is arranged on transmission shaft, transmission shaft is arranged on the centre of pump case and upper and lower plunger pump, and upper and lower plunger pump uses same transmission shaft connection for transmission.This plunger pump is equivalent to two axial piston pumps to be installed together simultaneously and to work, although increased the instantaneous working flow of product, has improved working pressure, and the flow pulsation of plunger pump does not have substantial variation.

Model utility content

The purpose of this utility model is to propose the intertwining phase place bidirectional ram pump of a kind of monocline, solves prior art and has that flow is little, pulsation is large, and the problems such as job insecurity, reduce and avoid that each element in whole hydraulic system periodically vibrates, creeps, noise.

For achieving the above object, the intertwining phase place bidirectional ram pump of monocline of the present utility model comprises transmission shaft, swash plate, housing, left plunger and right plunger; Described swash plate is fixed on described transmission shaft by spline, a described m left plunger and described n right plunger circumference uniform distribution is on the left side and right side of described swash plate, described transmission shaft, swash plate, left plunger and right plunger integral body are positioned at described enclosure interior, described left plunger is identical with the diameter of the circumference that right plunger distributes, described m left plunger and n right plunger setting angle differ the operation cycle half, motor drives described swash plate to rotate by described transmission shaft, and then drives described left plunger and right plunger work.

Described plunger pump also comprises left oil outlet, left oil inleting port, left filling valve, left gap hydraulic fluid port, right oil outlet, right filler opening, right filling valve and right end clearance hydraulic fluid port; Described left oil outlet and described right oil outlet are communicated with left bank oil pocket and right oil-discharging cavity respectively, and described left oil inleting port and described right filler opening are communicated with described left oil sucting cavity and right oil sucting cavity respectively; Described left filling valve is connected with right plunger with left plunger respectively with described right filling valve, and 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 are equal, and the span of described m and n is: m >=6, n >=6.

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

The beneficial effects of the utility model are: compared with prior art, the intertwining phase place bidirectional ram pump of monocline of the present utility model has improved traditional plunger pump structure, use the monocline right plunger symplex structure of facing left, the plunger misphase position half period design of swash plate both sides, and work, instantaneous flow doubles; simultaneously flow pulsation reduces to original 1/4th, due to the reverse axial force that interacts, therefore reduce plunger pump axial force, improve operating accuracy; Monocline dish double plunger pump of the present utility model has been realized twice co-operation in left and right, complete oil suction oil extraction, compare with traditional plunger pump, the plunger that has been equivalent to increase by one times is realized to-and-fro motion, increased work cavity volume, rated pressure doubles, and has solved traditional little problem of plunger pump pressure; The intertwining phase place bidirectional ram pump of monocline adopts the obliquity structures such as left and right sides plunger and thrust plate, and the installation of plunger differs half period with operating angle simultaneously, the pulsating quantity of the air-quantity chart gained of plunger pump is reduced to 1/4 of common plunger pump, reduce and avoid each element in whole hydraulic system to do periodically vibration, improving operating accuracy.

Accompanying drawing explanation

Fig. 1 is the intertwining phase place bidirectional ram pump of monocline of the present utility model overall structure erection drawing;

Fig. 2 is the plunger motion sketch of plunger pump of the present utility model;

Fig. 3 is that the pipeline of plunger pump of the present utility model connects sketch;

Fig. 4 is the oblique disk structure figure in plunger pump of the present utility model;

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

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

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

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

Wherein: 1, right oil outlet, 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 outlet, 10, left oil inleting port, 11, bearing, 12, right filler opening, 13, right filling valve, 14, transmission shaft, 15, total oil-discharging cavity, 16, left bank oil pocket, 17, left oil sucting cavity, 18, total oil sucting cavity, 19, pipeline A, 20, right oil sucting cavity, 21, right oil-discharging cavity, 22, pipeline B, 23, bearing hole, 24, piston shoes hole, 25, left side plunger ports, 26, right side plunger ports.

Embodiment

Below in conjunction with accompanying drawing, the utility model is described further.

Referring to accompanying drawing 1, accompanying drawing 2, accompanying drawing 3, accompanying drawing 5 and accompanying drawing 6, the intertwining phase place bidirectional ram pump of monocline of the present utility model comprises transmission shaft 14, swash plate 5, housing, left plunger 7 and right plunger 3; Described swash plate 5 is fixed on described transmission shaft 14 by spline, described 6 left plungers 7 and described 6 right plunger 3 circumference uniform distributions are on the left side and right side of described swash plate 5, described transmission shaft 14, swash plate 5, left plunger 7 and right plunger 3 integral body are positioned at described enclosure interior, described left plunger 7 is identical with the diameter of the circumference that right plunger 3 distributes, described m left plunger 7 and n right plunger 3 setting angles differ the operation cycle half, motor drives described swash plate 5 to rotate by described transmission shaft 14, and then drives described left plunger 7 and 3 work of right plunger.

Described plunger pump also comprises left oil outlet 9, left oil inleting port 10, left filling valve 8, left gap hydraulic fluid port 6, right oil outlet 1, right filler opening 12, right filling valve 2,13 and right end clearance hydraulic fluid port 4; Described left plunger 7 and right plunger 3 communicate with top by axial bore, radial hole, on the head cylndrical surface of described left plunger 7 and described right plunger 3, have cut skewed slot, change fuel delivery per cycle; On plunger bushing, be shaped with into, spill port, all communicate with the high and low pressure oil pocket in the pump housing, left oil outlet 9 as herein described and described right oil outlet 1 are communicated with left bank oil pocket 16 and right oil-discharging cavity 21 respectively.

Left filling valve 8 and right filling valve the 2, the 13rd, a kind of one-way valve, when acting on spring pressure, valve upper cone face contacts with valve seat sealing, and its effect is when fuel cut-off, high-pressure oil pipe and plunger upper end cavity volume is isolated, prevent that the oil in high-pressure oil pipe from blowing back in Injection Pump.The bottom of oiling valve is cross section, can lead, and can make again diesel oil pass through.Under the conical surface of outlet valve, have a little cylndrical surface, 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 dripping phenomenon.In the time of in endless belt falls into valve seat, make top volume increase fast, pressure reduces rapidly, and stop-spraying is rapid.Described left filling valve 8 is connected with right plunger 3 with left plunger 7 respectively with described right filling valve 2,13, and described housing 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 bearing hole 23 and piston shoes hole 24, and the bearing hole 23 of described swash plate 5 is connected with described housing by bearing 11, and described left plunger 7 and described right plunger 3 coordinate with described piston shoes hole 24 respectively.

Monocline dish double-plunger misphase position oil hydraulic pump overall structure adopts the swash plate 5 at an inclination angle such as two-sided to complete and piston valving work, and the left plunger 7 of swash plate 5 left and right sides and the common to-and-fro motion of right plunger 3 complete oil suction and oil extraction work separately simultaneously.Therefore, when monocline dish double-plunger misphase position oil hydraulic pump works, pipeline connects as shown in Figure 3: left oil sucting cavity 17 and the right oil sucting cavity 20 use pipeline A19 of the swash plate 5 left plungers 7 in the left and right sides and right plunger 3 are connected to form total oil sucting cavity 18, left bank oil pocket 16 and the right oil-discharging cavity 21 use pipeline B22 of the swash plate 5 left plungers 7 in the left and right sides and right plunger 3 are connected to form total oil-discharging cavity 15, and the operating angle that the operating angle that right side plunger ports 26 is installed and left side plunger ports 25 are installed differs the plunger motion cycle half, guarantee the stack of both sides flow curve when Wave crest and wave trough, reduce flow pulsation.

Motor drives transmission shaft 14 to drive inclination angle swash plate 5 rotations such as two-sided, and the to-and-fro motion simultaneously of left and right sides plunger, realizes oil suction oil extraction work, and the plunger that is simultaneously distributed in swash plate 5 circumference is done cyclical movement, and the cycle of motion is wherein z represents number of plungers.

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

The intertwining phase place bidirectional ram pump of monocline working principle is as follows: motor drives transmission shaft 14 to drive swash plate 5 to do circumference and rotatablely moves, the left and right plunger 3 being in contact with it is done linear reciprocating motion simultaneously, when first plunger is done compression movement, volume diminishes, it is large that pressure becomes, fluid is discharged by right oil drain out and left oil outlet 9, realizes oil extraction process.When first plunger is done stretching exercise, it is large that volume becomes, and pressure diminishes, and fluid sucks by right filler opening 12 and left oil inleting port 10, realizes oil-absorbing process.Left plunger 7 is for being distributed in the plunger at swash plate 5 left circumference tops, and right plunger 3 is the plungers that are distributed in swash plate 5 circumference tops, right side, and both sides plunger setting angle differs the operation cycle half, but works simultaneously, guarantees the additivity of flow curve.

The intertwining phase place bidirectional ram pump of monocline increases working pressure, reduces the principle of flow pulsation: during single plunger work, producing air-quantity chart is periodicity trigonometric function curve, the curve of the instantaneous flow producing during two plunger co-operation is equivalent to two periodically trigonometric function curve combinings, the angle of the half period that when therefore two plungers combine, staggered in the work phase angle of two plungers, its geometric meaning is that the stagger phase place of half period of the trigonometric function curve of two same waveform superposes, amplitude doubles, and amplitude variable quantity reduces 1/4th.

If pressure, flow and instantaneous flow that left plunger 7 and right plunger 3 produce are respectively p ₁, p ₂, Q ₁, Q ₂, (Q _sh) ₁, (Q _sh) ₂, pressure, flow and the instantaneous flow of the intertwining phase place bidirectional ram pump of monocline are p, Q, ∑ (Q _sh), there is formula (1):

$\left\{\begin{array}{c}{\mathrm{<figure-callout\; id="1"\; label="p"\; filenames="HDA00003629415500012.png"\; state="\{\{state\}\}">p</figure-callout>}}_1=p_2\\ {\mathrm{<figure-callout\; id="1"\; label="Q"\; filenames="HDA00003629415500012.png"\; state="\{\{state\}\}">Q</figure-callout>}}_1=Q_2\\ Q=Q_1+{\mathrm{<figure-callout\; id="2"\; label="Q"\; filenames="HDA00003629415500011.png"\; state="\{\{state\}\}">Q</figure-callout>}}_2\\ \mathrm{\&Sigma;}\left(Q_{\mathrm{sh}}\right)={\left(Q_{\mathrm{sh}}\right)}_1+{\left(Q_{\mathrm{sh}}\right)}_2\end{array}\right.---\left(1\right)$

When the plunger of the left and right sides is even number: the corner while establishing left plunger 7 and 3 work of right plunger is respectively

due to

the operation cycle that represents single plunger, so the work phase angle of left and right plunger 3 differs half period,

for the operating angle of right plunger 3 with respect to left plunger 7 hysteresis.

Instantaneous flow (Q _sh) ₁(Q _sh) ₂shown in formula (2) and formula (3):

Wherein, for the performance parameter of product, because

fall behind

in angle, to realize

?

should meet the operating angle shown in formula (4):

Through mathematical formulae (1), formula (2), formula (3) and formula (4), derive and draw the ∑ (Q shown in formula (5) and formula (6) _sh) _maxand ∑ (Q _sh) _min:

$\mathrm{\&Sigma;}{\left(Q_{\mathrm{sh}}\right)}_{\max }=\mathrm{<figure-callout\; id="2"\; label="k"\; filenames="HDA00003629415500011.png"\; state="\{\{state\}\}">k</figure-callout>}\frac{2\cos \frac{\mathrm{\&pi;}}{2z}}{\sin \frac{\mathrm{\&pi;}}{z}}---\left(5\right)$

$\mathrm{\&Sigma;}{\left(Q_{\mathrm{sh}}\right)}_{\min }=\mathrm{<figure-callout\; id="2"\; label="k"\; filenames="HDA00003629415500011.png"\; state="\{\{state\}\}">k</figure-callout>}\frac{2\cos \frac{\mathrm{\&pi;}}{2z}\cos \frac{\mathrm{\&pi;}}{2z}}{\sin \frac{\mathrm{\&pi;}}{z}}---\left(6\right)$

Formula (7) is instability of flow property coefficient:

$\mathrm{\&delta;}=\frac{\mathrm{\&Sigma;}{\left(Q\right)}_{\max }-\mathrm{\&Sigma;}{\left(Q\right)}_{\min }}{{\left(Q_t\right)}_1+{\left(Q_t\right)}_2}=\frac{k\tan \frac{\mathrm{\&pi;}}{4z}}{2Q_t}=\frac{\mathrm{\&pi;}}{2z}\tan \frac{\mathrm{\&pi;}}{4z}---\left(7\right)$

Wherein, Q _trepresent plunger pump mean flowrate, k is particular product performance parameters, and Q is plunger pump instantaneous flow, and z is the intertwining phase place of monocline to the number of plunger being installed in plunger pump.

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

Wherein: z represents that the intertwining phase place of monocline is to the number of plunger being installed in plunger pump, due to z>=1, equation the right exists a maximum value to be

therefore the flow pulsation coefficient of the intertwining phase place bidirectional ram pump of monocline be to the maximum common plunger pump flow pulsation 1/4th.

When in like manner, the plunger quantity in the intertwining phase place bidirectional ram pump of monocline is odd number; The derivation of its flow pulsation is the same.Conclusion: the flow pulsation coefficient of the intertwining phase place bidirectional ram pump of monocline flow pulsation coefficient and common plunger pump is business and is obtained formula (9):

In formula, z represents to install in the intertwining phase place bidirectional ram pump of monocline the number of plunger, and due to z>=1, equation the right exists a maximum value to be

therefore the flow pulsation coefficient of the intertwining phase place bidirectional ram pump of monocline be to the maximum common plunger pump flow pulsation 1/4th.

Monocline dish double-plunger misphase in this paper position axial piston pump, through theory analysis and Practical Calculation, the instantaneous flow of its pump equals two times of common plunger pump flow, and ripple factor reduces, and pulsation rate is 1/4 of conventional pump to the maximum.The instantaneous flow unstability working pressure large, that produce that has solved conventional hydraulic pumps can not meet machine demand, working pressure is difficult to stable problem, reduces and avoids each several part element in whole installations to do the vibration of erratic behavior and the noise that causes.The research of hydraulic pump product and hydraulicdriven machine are had to using value.

Referring to accompanying drawing 7, the air-quantity chart that driving ram pump produces is periodicity trigonometric function curve, because the plunger of the oil hydraulic pump left and right sides, monocline dish double-plunger misphase position carries out oil suction oil extraction work simultaneously, therefore to be equivalent to two amplitudes identical for its air-quantity chart, the trigonometric function curve combining that cycle is the same, again because the operating angle of left and right sides plunger differs half of single plunger motion cycle, therefore the geometric meaning of the intertwining phase place bidirectional ram pump of monocline air-quantity chart is two duplicate trigonometric function curves curves of half period phase place (two periodically the Wave crest and wave trough of curves mutually superpose) generation that stagger.Its amplitude superposes mutually, and amplitude variable quantity is folded subtracting mutually.

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

Be more than embodiment of the present utility model, but absolutely not to restriction of the present utility model.

Claims (4)

1. the intertwining phase place bidirectional ram pump of monocline, is characterized in that, comprises transmission shaft (14), swash plate (5), housing, left plunger (7) and right plunger (3), described swash plate (5) is fixed on described transmission shaft (14) by spline, described m left plunger (7) and described n right plunger (3) circumference uniform distribution is on the left side and right side of described swash plate (5), described transmission shaft (14), swash plate (5), left plunger (7) and right plunger (3) integral body are positioned at described enclosure interior, described left plunger (7) is identical with the diameter of the circumference that right plunger (3) distributes, described m left plunger (7) and n right plunger (3) setting angle differ the operation cycle half, motor drives described swash plate (5) to rotate by described transmission shaft (14), and then drive described left plunger (7) and right plunger (3) to work.

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

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

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

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