CN206681922U - A kind of hydraulic fluid port shaft orientation plunger variable pump of low noise parallel connection distributing construction four - Google Patents

Abstract

The utility model discloses a kind of hydraulic fluid port shaft orientation plunger variable pump of low noise parallel connection distributing construction four.The pump is made up of parts such as housing, pump protecgulum, pump postoperculum, main shaft, swash plate reel cage, return plate, cylinder body, valve plate, plunger, piston shoes, bearing, variable control mechanisms.The cylinder body of the pump has ten plunger holes, is divided into two groups, every group five, respectively on different reference circles, plunger is adapted with cylinder body plunger hole；Cylinder center is provided with splined hole, and main shaft coordinates through cylinder body and splined hole；Cylinder body flow end face and valve plate composition friction pair, its piston shoes part of plunger and swash plate reel cage composition friction pair in cylinder body plunger hole；Plane valving surface end face corresponding with valve plate is static connection on pump postoperculum；Valve plate uses the window structure form of inner and outer rings flow, and it is in symmetrically twin nuclei in parallel that suction oil oil-distribution port above bottom dead centre line, which is,；Pump postoperculum has four hydraulic fluid ports, each independent, and the combination of four hydraulic fluid ports can make the plunger pump have different working methods.

Description

A kind of hydraulic fluid port shaft orientation plunger variable pump of low noise parallel connection distributing construction four

Technical field

Shaft orientation plunger variable pump technology is the utility model is related to, specially a kind of hydraulic fluid port axle of low noise parallel connection distributing construction four To plunger variable pump.

Background technology

Electrohydraulic control technology is divided to valve control and the major class of pump control two.The deficiency for the valve control technology maximum being widely used at present is to exist Big restriction loss, energy efficiency are low.Low energy efficiency not only increases system installed power, also causes system heat generation, attached The cooling device added further increases system installed power and cost, and heating is also to cause the main of hydraulic system failure One of reason.Valve control system is mostly to use open circuit, and fluid usage amount is big, and meeting generation environment, which pollutes, when handling waste oil asks Topic.Using direct pump control technology, using pump control principle, energy efficiency can be improved compared with valve control system, reduce system heat generation, reduce dress Acc power, it is current study hotspot.Shaft orientation plunger variable pump directly controls the technology of asymmetric cylinder to reach maturation at present Level, it is widely used.But in terms of shaft orientation plunger variable pump directly controls cylinder with differential effect, though numerous studies are had been carried out, technology Level also greatly improves, but because the chamber flow of cylinder with differential effect two has differences, prior art is still undesirable, in actual use, needs Introduce external hydraulic system or element auxiliary shaft orientation plunger variable pump drives cylinder with differential effect to move jointly, without finding a kind of energy picture Control asymmetric cylinder the same, need to only use shaft orientation plunger variable pump can autobalance cylinder with differential effect asymmetric flow, control It is moved.Shaft orientation plunger variable pump directly controls the application of cylinder with differential effect cost height, technical sophistication to be present at present, is only applicable to some The problems such as certain loads operating mode, its extensive use are restricted.Meanwhile for synchronizing control loop, largely use at present Method is in addition to valve control, also volumetric speed control mode, is exactly using two pump co- controllings, two executive components or the control of single pump Single syncmotor or oil cylinder；In addition, the double hydraulic fluid port shaft orientation plunger variable pumps of open circuit standard are only used for single direction rotation, at present The country is also no can be both used for open circuit and can and be used for closed circuit with single direction rotation and can bidirectional rotation, moreover it is possible to straight Connect the shaft orientation plunger variable pump of two synchronous executing agencies of control driving.

The content of the invention

The utility model for solve existing axial plunger pump can not bidirectional rotation cause its can not only be used for open circuit but also Closed circuit and the larger technical problem of work noise can be used for, there is provided a kind of hydraulic fluid port axial columns of low noise parallel connection distributing construction four Fill in variable pump.

The utility model is realized using following technical scheme：A kind of hydraulic fluid port axial columns of low noise parallel connection distributing construction four Variable pump is filled in, including the swash plate reel cage of housing, pump postoperculum, pump protecgulum, cylinder body, main shaft, tilt adjustable section, return plate, is matched somebody with somebody Flow table and one end are provided with the plunger of piston shoes；The main shaft sequentially passes through is opened in swash plate reel cage, return plate, cylinder body and flow respectively Centre bore on disk is simultaneously fixedly connected with cylinder body；On pump postoperculum is plane with stream interface, and it is plane that valve plate, which corresponds to end face, flow It is plane static connection, valve plate and cylinder body with being Plane Rotation flow between stream interface that disk and pump postoperculum, which are matched somebody with somebody between stream interface,；On cylinder body Ten plunger holes are provided with around its centre bore, are provided with a plunger in each plunger hole, plunger axially bored line is parallel with main-shaft axis； Its piston shoes of plunger and swash plate reel cage composition friction pair；Each plunger hole is penetrated to cylinder body by an assignment hole matches somebody with somebody stream interface； The assignment hole is divided into two groups, and every group five, two assemble discharge orifice is located at two differences respectively in cylinder body with the port on stream interface Reference circle on so that respectively constitute one group inner side assignment hole and one group on the outside of assignment hole and inner side assignment hole and outside assignment hole It is set in distance；Be opened in the window structure form that oil-distribution port on valve plate uses inner and outer rings flow, the oil-distribution port with The upper bottom dead centre line of valve plate is that symmetry axis is in twin nuclei in parallel, and then forms a pair of inner ring oil-distribution ports and a pair of outer shrouds Oil-distribution port；The pair of inner ring oil-distribution port is used for and each inner side assignment hole connects, the pair of outer shroud oil-distribution port For being connected with each outside assignment hole；Pump postoperculum is provided with four each independent hydraulic fluid ports, and each hydraulic fluid port is by being opened in pump Separate flow oil duct inside bonnet is connected with an oil-distribution port.

Plunger pump described in the utility model when in use, is first adjusted the angle of inclination of swash plate reel cage, appointed in four hydraulic fluid ports Two hydraulic fluid ports of meaning side, both can also be used as oil-out as oil inlet；Cylinder body rotates under the drive of main shaft, position Coordinate in the plunger in cylinder body plunger hole and plunger hole, moved reciprocatingly along plunger hole, outside oil passes through corresponding flow oil Road, oil-distribution port and assignment hole enter plunger hole, defeated by other flow oil duct, oil-distribution port in the presence of plunger afterwards Go out to oil-out.Four hydraulic fluid ports can be divided into two groups, and the angle of inclination of swash plate reel cage can be adjusted, and cylinder body can coordinate tiltedly The angle of inclination Double-directional rotary of disk reel cage, and then every group of hydraulic fluid port can both be used as oil-out, can also be used as oil inlet；Hydraulic fluid port Arrangement mode can be distributed on pump postoperculum according to being actually needed.

Oil-distribution port on valve plate is twin nuclei in parallel, and oil-distribution port uses the structure type of inside and outside reference circle, with The corresponding matching of oil-distribution port on pump postoperculum.The plunger pump both can be with single direction rotation, again can be with bidirectional rotation；Open type can be worked as Pump, and can work as enclosed pump, and its use range is more extensive.

Further, it is horizontal plane at the top of the swash plate reel cage, the relative both ends in bottom are semicircular arc, respective pump protecgulum The slideway of a pair of half-circle-arc shapes is inside provided with, swash plate reel cage is located in the slideway and adjusts its angle of inclination by controlling organization；Tiltedly The not semicircular arc both ends of disk reel cage extend to form extension laterally；The controlling organization include a pair of spacing adjusting rods and A pair of variable control mechanisms；The spacing adjusting rod by pump protecgulum bottom end face stretch into enclosure interior and with the extension of swash plate reel cage Section bottom connection touches, and the part that spacing adjusting rod is located on the outside of pump protecgulum is arranged with locking nut；The variable control mechanism is adopted With control piston assembly；The base of control piston assembly is fixed on the inwall of pump postoperculum, control the movable end of piston assembly with tiltedly The regulation both ends of disk reel cage（That is the upper surface of extension）It is in contact.

Pass through spacing adjusting rod and variable control mechanism, it is possible to achieve the regulation at swash plate reel cage angle of inclination, thus The regulation of variable pumpage can be conveniently realized, while can also realize the bidirectional rotation of variable pump, and can be according to reality Border needs to adjust the flow and pressure into and out of oil.

Further, an end of each oil-distribution port on valve plate or both ends are provided with pocketed oil damping trough；The pocketed oil The U-shaped ladder grading structure of damping trough, the i.e. depth and width of pocketed oil damping trough are outwards gradually reduced by the end of oil-distribution port.

The end of each oil-distribution port of valve plate is designed with the pocketed oil damping trough specially designed, reduces the pressure punching of hydraulic pump Hit, the characteristic for making plunger pump that there is low noise to run.According to the facilities of valve plate oil-distribution port end pocketed oil damping trough not Together, the plunger pump both can be with single direction rotation, again can be with bidirectional rotation；Open type pump can be worked as, and can works as enclosed pump.

Cylinder center is provided with internal splined hole, and main shaft coordinates through cylinder body and internal splined hole；Main shaft is used with cylinder body through hole and set Spline connection at internal splined hole.

The return plate and piston shoes are located between cylinder body and swash plate reel cage；Wherein return plate is provided with spacing hole, spacing hole Centre bore around return plate is arranged symmetrically, and piston shoes are placed in the spacing hole on return plate；The piston shoes be in and spacing hole phase The boss-shaped matched somebody with somebody, and piston shoes are spacing by return plate, it is relative with swash plate reel cage supporting surface to slide, piston shoes and swash plate reel cage supporting surface it Between mutually constitute friction pair.

The piston shoes bottom is provided with static pressure supporting surface structure, and is engaged with swash plate reel cage supporting surface, is provided with the top of piston shoes Ball-and-socket, plunger bottom is provided with bulb, and the ball-and-socket at the top of piston shoes and the bulb of plunger bottom match.

Plunger uses annular hollow structure, and centre is damping oil hole, and damping oil duct and and damping oil are machined with inside bulb Hole penetrates.

Hydraulic fluid port on pump postoperculum is grouped two-by-two, respectively on two relative sides of pump postoperculum.

The hydraulic fluid port plunger variable pump technique of distributing construction in parallel four described in the utility model is simple, pressure up to 350bar with On, structural stability is good, reliability is high, noise is low, long lifespan, has higher stability and reliability.The utility model can To realize single pump direct enclosed control cylinder with differential effect loop, four hydraulic fluid port shaft orientation plunger variable pumps can asymmetric flow, match cylinder with differential effect Two chamber difference in flow；Simultaneously can also symmetrical flow, realize the action of synchronous two hydraulic actuators of driving of single pump, can also make Used for common standard shaft orientation plunger variable pump.

Brief description of the drawings

Fig. 1 is the hydraulic fluid port plunger variable pump cross-sectional view of distributing construction four in parallel.

Fig. 2 is the hydraulic fluid port plunger variable pump A-A cross-sectional views of distributing construction four in parallel.

Fig. 3 is main shaft dimensional structure diagram.

Fig. 4 is switch plunger structure diagram, and wherein a is dimensional structure diagram, and b is its cross-sectional view.

Fig. 5 is cylinder body dimensional structure diagram.

Fig. 6 is cylinder body main structure diagram.

Fig. 7 is cylinder C-C cross-sectional views.

Fig. 8 is that cylinder body matches somebody with somebody stream interface structural representation.

Fig. 9 is valve plate bispin dimensional structure diagram.

Figure 10 is that valve plate list revolves dimensional structure diagram.

Figure 11 is valve plate bispin structural representation.

Figure 12 is that valve plate list revolves structural representation.

Figure 13 is valve plate bispin pocketed oil damping slot structure schematic diagram.

Figure 14 is that valve plate list revolves pocketed oil damping slot structure schematic diagram.

Figure 15 is that plunger, piston shoes, return plate and swash plate reel cage combine partial enlargement structural representation.

Figure 16 is return plate dimensional structure diagram.

Figure 17 is swash plate reel cage dimensional structure diagram.

Figure 18 is the cross-sectional view of controlling organization.

Figure 19 is plunger variable pump dimensional structure diagram.

Figure 20 is pump protecgulum dimensional structure diagram.

Figure 21 is pump protecgulum adpting flange, places bearing and rotatory sealing positional structure schematic diagram.

Figure 22 is that pump protecgulum places swash plate reel cage positional structure schematic diagram.

Figure 23 is pump postoperculum dimensional structure diagram.

Figure 24 is that pump postoperculum places valve plate positional structure schematic diagram.

Figure 25 is pump postoperculum oil port structure schematic diagram.

Figure 26 is pump postoperculum flow oil channel structure schematic diagram.

Main element symbol description：

Wherein：1- housings, 2- pump postoperculums, 3- main shafts, 4- plunger holes, 5- cylinder bodies, 6- plungers, 7- internal splined holes, 8- flows Disk, 9- swash plate reel cages, 10- return plates, 11- piston shoes, 12- spacing holes, 13- bulbs, 14- ball-and-sockets, 15- variable control mechanisms, 16- Slideway, 17- pump protecgulums, 18- machinery rotatory sealings, 19- pump drive end bearing brackets, 20- spacing adjusting rods, 21- locking nuts, 22- bearings, 23- main springs, 24- spring collars I, 25- cone bearings, 26- pump rear end caps, 27- ball pivots, 28- alignment pins, 29- flat keys, 30- bullets Spring collar II, 31- assignment holes, 32- flow oil ducts；

8a- inner ring oil-distribution ports, 8b- outer shroud oil-distribution ports, 8c- pocketed oil damping troughs.

Embodiment

A kind of hydraulic fluid port shaft orientation plunger variable pump of low noise parallel connection distributing construction four, including housing, pump protecgulum, pump postoperculum, master The elements such as axle, swash plate reel cage, return plate, cylinder body, valve plate, plunger, piston shoes, bearing, displacement control mechanism, the cylinder body tool of the pump There are ten plunger holes, plunger is adapted with cylinder body plunger hole；Cylinder body assignment hole is divided into two groups, every group five, is located at difference respectively Reference circle on；Cylinder center is provided with splined hole, and main shaft coordinates through cylinder body and splined hole；Plunger axially bored line and master on cylinder body Axle diameter parallel；Valve plate uses the structure type of inner and outer rings oil-distribution port, and suction oil oil-distribution port above bottom dead centre line is It is in symmetrically twin nuclei in parallel；The end of each oil-distribution port of valve plate is designed with the pocketed oil damping trough specially designed, reduces axle To the compression shock of plunger variable pump, the characteristic for making plunger pump that there is low noise to run；Pump postoperculum has four hydraulic fluid ports, each solely It is vertical, it is symmetric, the combination application of four actuator ports can make the plunger pump have different working methods.

The cylinder body profile is cylindrical, cylinder body assignment hole in different reference circles as angle arrangement, and cylinder body bus and post Consent axis is parallel.

The main shaft is connected with cylinder center hole using spline.

The plunger pump includes return plate and plunger sphere coupling part piston shoes, and the return plate connects with plunger sphere Part piston shoes are located between cylinder body and swash plate reel cage；Wherein return plate is provided with spacing hole, and spacing hole is arranged symmetrically, and piston shoes are placed in In spacing hole on return plate.

The piston shoes part is in the boss-shaped to match with return plate spacing hole, and piston shoes are spacing by return plate, with swash plate Reel cage supporting surface is relative to be slided, and friction pair is mutually constituted between piston shoes and swash plate reel cage supporting surface.

The piston shoes section bottom is engaged provided with static pressure supporting surface structure with swash plate reel cage supporting surface, is provided with the top of piston shoes Ball-and-socket, plunger bottom is provided with bulb, and the ball-and-socket at the top of piston shoes and the bulb of plunger bottom match.

The plunger pump also includes displacement control mechanism, and the controlling organization is located at swash plate reel cage both ends.

It is horizontal plane at the top of swash plate reel cage, bottom both ends are semicircular arc, and half-circle-arc shape slideway is provided with corresponding housing, Swash plate reel cage is located in the slideway adjusts its gradient by controlling organization.

Pump postoperculum is provided with four hydraulic fluid ports, each independent, is symmetric；Hydraulic fluid port, which corresponds to, is provided with flow oil duct and control in bonnet Liquefaction road；Flow oil duct communicates with stream interface, and the combination application of the actuator port after four flows can be such that the plunger pump has not Same working method.

Valve plate oil-distribution port is twin nuclei in parallel, and oil-distribution port uses the structure type of inside and outside reference circle, after pump The corresponding matching of oil-distribution port covered.The end of each oil-distribution port of valve plate is designed with the pocketed oil damping trough specially designed, Reduce the compression shock of hydraulic pump, the characteristic for making plunger pump that there is low noise to run.According to valve plate oil-distribution port end pocketed oil The facilities of damping trough are different, and the plunger pump both can be with single direction rotation, again can be with bidirectional rotation；Open type pump, and can be worked as When enclosed pump, its use range are more extensive.

With reference to being specifically illustrating, technological means, creation characteristic to the utility model realization are expanded on further：

As shown in Fig. 1 to 23, a kind of hydraulic fluid port shaft orientation plunger variable pump of low noise parallel connection distributing construction four, including such as Fig. 1, figure Shown in 2, housing 1, pump protecgulum 17, pump postoperculum 2, main shaft 3, the cylinder body 5 for being provided with plunger hole 4；Fitted on cylinder body 5 with the phase of plunger hole 4 The plunger 6 matched somebody with somebody, as shown in figure 4, to mitigate plunger quality, reduce plunger with cylinder body rotate caused by centrifugal force, plunger 6 uses Annular hollow structure, centre is damping oil hole；The center of cylinder body 5 is provided with internal splined hole 7, and main shaft 3 passes through cylinder body 5 and internal splined hole 7 Coordinate；There is valve plate 8 on the top of cylinder body 5, and there is swash plate reel cage 9 bottom of cylinder body 5, and wherein valve plate 8 is connected with pump postoperculum 2, and swash plate shakes Frame 9 is connected with pump protecgulum 17；Main shaft 3 as shown in Figure 2,3, through the bearing of pump protecgulum 17 and sealing, valve plate 8, the center of cylinder body 5 Hole, the bearing of pump postoperculum 2, be located by connecting rotation；The top end face of cylinder body 5 is plane, and the corresponding end face of valve plate 8 is plane, cylinder body 5 and is matched somebody with somebody Plane is cooperation between flow table 8；The axis of plunger hole 4 and the axis of main shaft 3 on cylinder body 5 is parallel, the bottom of plunger hole 4 and main shaft 3 Vertical range is equal with the vertical range of main shaft 3 with the top of plunger hole 4；Pump protecgulum 17, housing 1 and pump postoperculum 2 are positioned by pin, Pump protecgulum 17 keeps concentric with the bearing in pump postoperculum 2, ensures the normal work of main shaft 3.

For the cylinder body 5 as shown in Fig. 5,6,7,8, profile is cylindrical, and the bus of cylinder body 5 is parallel with the axis of plunger hole 4. Main shaft 3 is connected with the centre bore of cylinder body 5 using spline, ensures main shaft 3 and the stable connection of cylinder body 5.It is provided with inside the centre bore of cylinder body 5 Spring cavity, equipped with main spring 23, its effect is pre-pressing force when meeting plunger pump startup, and main spring 23 leans on spring collar I 24 It is positioned in cylinder body 5.

Valve plate structure for plunger pump is divided to bidirectional rotation and single direction rotation two kinds of shapes as shown in Fig. 9,10,11,12,13,14 Formula, oil-distribution port take parallel way to be arranged, and each oil-distribution port is in convex structure, and each oil-distribution port connects respectively One actuator port of logical plunger pump.During plunger pump work, the compression shock, the flow that occur among high-low pressure chamber transfer process fall These factors such as filling, flow pulsation are the main reason for plunger pump produce noise.Plunger pump is in oil-absorbing process, choke-out plunger cavity It is rotated from top dead-centre to bottom dead centre, the closing working chamber volume that plunger is formed with cylinder body plunger hole constantly increases to be formed Negative pressure, fluid enter intracavitary under atmospheric pressure, now can easily dissolve the air of certain volume in hydraulic oil, if matched somebody with somebody Flow table oil-distribution port size design is unreasonable, and the cavity pressure that worked in oil suction is down to below oleo-pneumatic separation pressure, can be caused Air separates out, and produces cavitation；After the closing working chamber that plunger and cylinder body plunger hole are formed is linked up with oil-discharging cavity, bubble exists Crumbled and fall under high pressure, impact can be produced to plunger and cylinder bore, cause plunger pump to produce larger noise.Figure 13 is valve plate pocketed oil Damping slot structure schematic diagram, is U-shaped ladder grading structure, corresponding size be according to pump in 0-350bar working ranges, close Dead plunger cavity rotation after bottom dead center pre-loading and the requirement depressurized in advance, is corrected by upper by simulation calculation and substantial amounts of experiment, So that the physical dimension of pocketed oil damping trough meets flow pulsation caused by pump, the requirement of pressure fluctuation standard, noise grade is kept to most It is low.Valve plate of plunger pump pocketed oil damping slot structure of the present utility model, especially pocketed oil damping trough use U-shaped hierarchic structure, its The Bubble that plunger cavity occurs in release can be suppressed, slow down the compression shock for reducing plunger pump and flow pulsation, and then The noise of plunger pump is reduced, it is all kept the characteristic of low noise when being worked under various operating modes.Plunger pump cylinder body assignment hole with Valve plate counterface is matched, and adjacent plunger bottom of chamber portion flow mounting hole window takes symmetrical cloth one on the other on cylinder body Put, as shown in figure 8, ensure that four actuator ports of plunger pump during work are separate, be independent of each other.Distributing construction four in parallel Hydraulic fluid port shaft orientation plunger variable pump can make it have different working methods by the combination application of four actuator ports：（1）Both may be used To be used when open type pump, it can also work as enclosed pump and use；（2）Single executive component can be driven as common axial plunger pump； （3）Separate unit plunger pump synchronously two executive components of driving can be realized, that is, two hydraulic pump Driven by Coaxial, two execution Element is operated, and inner and outer rings oil-distribution port respectively controls a loop by the actuator port of plunger pump；（4）List can be realized The direct enclosed control cylinder with differential effect loop of pump.In practical application, the inflow of the chamber of cylinder with differential effect two is different with delivery flow, enclosed is taken to return When road controls, flow can be changed by changing the plunger quantity communicated with oil-distribution port or oil-distribution port size, make hydraulic pressure Pumping, the actuator port flow of oil extraction meet the demand of cylinder with differential effect.

The plunger pump also includes as shown in Figure 15,16,17, swash plate reel cage 9, return plate 10 and piston shoes 11, the He of return plate 10 Some piston shoes 11 are located between cylinder body 5 and swash plate reel cage 9；Wherein ball pivot 27 is connected by internal spline with main shaft 3, return plate 10 Central bore and the outer surface of ball pivot 27 are slidably connected, and return plate 10 is provided with some spacing holes 12, and wherein piston shoes 11 are distinguished In the spacing hole 12 on return plate 10；Spacing hole 12 on the return plate 10 respectively with the bottom piston shoes part position of plunger 6 Put one-to-one corresponding；The bottom of plunger 6 is provided with bulb 13, and damping oil duct is machined with inside bulb 13, and the top of piston shoes 11 is provided with ball Nest 14, the ball-and-socket 14 at the top of piston shoes 11 are adapted with the bulb 13 of the bottom of plunger 6；Then each bottom of plunger 6, which can be ensured, to be had pair Position should be stably connected with, further ensures the stability and reliability of transmission.

The piston shoes 11 are in the boss-shaped that is adapted with spacing hole 12, and piston shoes 11 are spacing with swash plate reel cage 9 by return plate 10 Supporting surface is relative to be slided；The compacting of piston shoes 11 is limited on the supporting surface of swash plate reel cage 9 by return plate 10, and ensures the phase of piston shoes 11 Rotational slide is carried out to the supporting surface of swash plate reel cage 9.

The plunger pump also includes as shown in figure 18, variable control mechanism 15, and the controlling organization 15 is located at the water of swash plate reel cage 9 Flat both ends；The variable control mechanism 15 is variable piston assembly, and the variable piston assembly is respectively in hydraulic coupling and spring force In the presence of extend and retract；The change at the angle of inclination of swash plate reel cage 9 can be realized using the controlling organization 15, and then pump can be realized The change of output flow.

The plunger pump also includes as shown in Figure 19,20,21,22,23,24,25,26, the oil of low noise parallel connection distributing construction four The outline structural diagram of mouth shaft orientation plunger variable pump.Figure 19 is plunger pump dimensional structure diagram；In figure, one side for hydraulic fluid port 1, Hydraulic fluid port 2, opposite side are hydraulic fluid port 3, hydraulic fluid port 4.Figure 20 is pump protecgulum dimensional structure diagram；Wherein, Figure 21 is adpting flange and put Bearing, the rotatory sealing location drawing are put, Figure 22 is to put the swash plate reel cage location drawing（It can be seen that the slideway of a pair of half-circle-arc shapes）.Figure 23 is Pump postoperculum dimensional structure diagram, wherein, Figure 24 and Figure 25 are the placement valve plate location drawing and four hydraulic fluid port figures；Figure 26 is flow Oil duct figure.

Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model Within the spirit and principle of utility model, any modification, equivalent substitution and improvements made etc., the utility model should be included in Protection domain within.

Claims (8)

1. a kind of hydraulic fluid port shaft orientation plunger variable pump of low noise parallel connection distributing construction four, including housing（1）, pump postoperculum（2）, pump protecgulum （17）, cylinder body（5）, main shaft（3）, tilt adjustable section swash plate reel cage（9）, return plate（10）, valve plate（8）Set with one end There are piston shoes（11）Plunger（6）；The main shaft（3）Sequentially pass through and be opened in swash plate reel cage respectively（9）, return plate（10）, cylinder body（5） And valve plate（8）On centre bore and and cylinder body（5）Connected by spline；Pump postoperculum（2）On be plane with stream interface, flow Disk（8）Corresponding end face is plane, valve plate（8）With pump postoperculum（2）With being plane static connection between stream interface, valve plate（8）With cylinder Body（5）Between be Plane Rotation flow；Characterized in that, cylinder body（5）It is upper to be provided with ten plunger holes around its centre bore（4）, often Individual plunger hole（4）Inside it is provided with a plunger（6）, plunger hole（4）Axis and main shaft（3）Diameter parallel；Plunger（6）Its piston shoes（11） With swash plate reel cage（9）Form friction pair；Each plunger hole（4）Pass through an assignment hole（31）Penetrate to cylinder body（5）Flow Face；The assignment hole（31）It is divided into two groups, every group five, two assemble discharge orifice（31）In cylinder body（5）With the port point on stream interface Wei Yu not be on two different reference circles, and then respectively constitute assignment hole and inner side flow on the outside of one group of inner side assignment hole and one group Hole and outside assignment hole are set in distance；It is opened in valve plate（8）On oil-distribution port use inner and outer rings flow window structure shape Formula, the oil-distribution port is with valve plate（8）Upper bottom dead centre line for symmetry axis be in twin nuclei in parallel, and then composition one pair in Ring oil-distribution port（8a）With a pair of outer shroud oil-distribution ports（8b）；The pair of inner ring oil-distribution port（8a）For and cylinder body（5）Respectively Individual inner side assignment hole connects, the pair of outer shroud oil-distribution port（8b）For and cylinder body（5）Each outside assignment hole connects； Pump postoperculum（2）Provided with four each independent hydraulic fluid ports, each hydraulic fluid port is by being opened in pump postoperculum（2）The separate of inside is matched somebody with somebody Flow oil duct（32）It is connected with an oil-distribution port.

A kind of 2. hydraulic fluid port shaft orientation plunger variable pump of low noise parallel connection distributing construction four as claimed in claim 1, it is characterised in that The swash plate reel cage（9）Top is horizontal plane, and the relative both ends in bottom are semicircular arc, respective pump protecgulum（17）Inside it is provided with a pair The slideway of half-circle-arc shape（16）, swash plate reel cage（9）Its angle of inclination is adjusted in the slideway and by controlling organization；Swash plate shakes Frame（9）Not semicircular arc both ends extend to form extension laterally；The controlling organization includes a pair of spacing adjusting rods （20）With a pair of variable control mechanisms（15）；The spacing adjusting rod（20）By pump protecgulum（17）Bottom end face stretches into housing（1） It is internal and with swash plate reel cage（9）Extension bottom connection touch, spacing adjusting rod（20）Positioned at pump protecgulum（17）The part in outside It is arranged with locking nut（21）；The variable control mechanism（15）Using control piston assembly；The base of control piston assembly is consolidated It is scheduled on pump postoperculum（2）Inwall, control the movable end of piston assembly and swash plate reel cage（9）Regulation both ends be in contact.

3. a kind of hydraulic fluid port shaft orientation plunger variable pump of low noise parallel connection distributing construction four as claimed in claim 1 or 2, its feature exist In valve plate（8）On one of each oil-distribution port end or both ends be provided with pocketed oil damping trough（8c）；The pocketed oil damping trough （8c）U-shaped ladder grading structure, i.e. pocketed oil damping trough（8c）Depth and width outwards gradually subtracted by the end of oil-distribution port It is small.

4. a kind of hydraulic fluid port shaft orientation plunger variable pump of low noise parallel connection distributing construction four as claimed in claim 1 or 2, its feature exist In cylinder body（5）Center is provided with internal splined hole（7）, main shaft（3）Through cylinder body（5）With internal splined hole（7）Coordinate；Main shaft（3）With cylinder Body（5）Through hole uses and is located at internal splined hole（7）The spline connection at place.

5. a kind of hydraulic fluid port shaft orientation plunger variable pump of low noise parallel connection distributing construction four as claimed in claim 1 or 2, its feature exist In the return plate（10）And piston shoes（11）Located at cylinder body（5）With swash plate reel cage（9）Between；Wherein return plate（10）It is provided with Spacing hole（12）, spacing hole（12）Around return plate（10）Centre bore be arranged symmetrically, piston shoes（11）It is placed in return plate（10）On Spacing hole（12）In；The piston shoes（11）It is in and spacing hole（12）The boss-shaped to match, and piston shoes（11）By return plate （10）It is spacing, with swash plate reel cage（9）Supporting surface is relative to be slided, piston shoes（11）With swash plate reel cage（9）Mutually formed between supporting surface Friction pair.

6. a kind of hydraulic fluid port shaft orientation plunger variable pump of low noise parallel connection distributing construction four according to claim 5, its feature exist In：The piston shoes（11）Bottom is provided with static pressure supporting surface structure, and with swash plate reel cage（9）Supporting surface is engaged, piston shoes（11）Top Portion is provided with ball-and-socket（14）, plunger（6）Bottom is provided with bulb（13）, and piston shoes（11）The ball-and-socket at top（14）With plunger（6）Bottom Bulb（13）Match.

7. a kind of hydraulic fluid port shaft orientation plunger variable pump of low noise parallel connection distributing construction four according to claim 6, its feature exist In：Plunger（6）Using annular hollow structure, centre is damping oil hole, bulb（13）Inside be machined with damping oil duct and with damping Oilhole penetrates.

8. a kind of hydraulic fluid port shaft orientation plunger variable pump of low noise parallel connection distributing construction four according to claim 1 or 2, its feature It is：Pump postoperculum（2）On hydraulic fluid port be grouped two-by-two, respectively positioned at pump postoperculum（2）On two relative sides.