CN102367788B - Staggered phase parallel combined plunger-type hydraulic pump - Google Patents

Abstract

The invention discloses a staggered phase parallel combined plunger-type hydraulic pump which comprises M plunger pumps, 2M-2 synchronous belt wheels of the same structure, M-1 synchronous belts of the same structure, M-1 tension pulleys (14) of the same structure, 2M-2 expansion coupling sleeves (15) of the same structure and a servo motor (18), wherein M is a natural number which is greater than or equal to 2; the M plunger pumps are installed on a parallel combined pump installation plate, thus rotation axes of the plunger pumps are parallel mutually and are in the same horizontal plane; each of the M plunger pumps, except for the plunger pumps at two ends, are provided with two synchronous belt wheels of the same structure; the synchronous belt wheels on two adjacent plunger pumps are connected by adopting synchronous belts of the same structure; oil inlets and oil pressing ports of the M plunger pumps are connected respectively by pipelines; the output end of one plunger pump is connected with the servo motor (18); and a plunger of one plunger pump in the two adjacent plunger pumps has a staggered phase angle beta relative to a plunger of the previous plunger pump.

Description

Staggered phase parallel combined plunger-type hydraulic pump

Technical field

The present invention relates to a kind of combined liquid press pump that is applied to mechanical engineering hydraulic transmission technology field, or rather, the present invention relates to a kind of staggered phase parallel combined plunger-type hydraulic pump.

Background technique

Pluger type hydraulic pump (referred to as plunger pump), it is the to-and-fro motion that relies on plunger, the volume in change plunger case sucks and discharges the pump of liquid.The form of plunger pump is a lot, different with moving direction by the arrangement of plunger, can be divided into radial plunger pump and axial piston pump.Plunger pump becomes the important motivity element in hydraulic transmission because having the advantages such as parameter is high, efficiency is high, the life-span is long, variable is convenient.Be widely used in high pressure, large flow, powerful system and occasion that flow need to regulate, as double column planing machine, broaching machine, hydraulic press, engineering machinery, Aero-Space, precision optical machinery etc. are widely used.According to the flow theory of plunger pump, all there is flow pulsation in the plunger pump of any structural type bar none, and the instantaneous output flow of plunger pump is cyclically-varying.The even piston pump flow pulsation that odd piston pump closes on than it is much smaller, and along with the increase of plunger number but flow pulsation reduce.Flow pulsation in hydraulic system must cause pressure pulsation, thereby can cause that each element in whole hydraulic system periodically vibrates, creeps, noise, even damages.In order to reduce pulsation, traditional oil hydraulic pump often adopts odd piston pump, and adopts measures such as increasing accumulator and application flexible pipe, and these measures can only be eliminated part pulsation, but cannot quantitatively calculate the value that reduces of pulsation; Also have the method that adopts oil hydraulic pump to increase plunger number, but limit by structure, plunger number is difficult to too many and stepless, cannot significantly reduce flow system flow pulsation and pressure pulsation that oil hydraulic pump causes.

Summary of the invention

Technical problem to be solved by this invention is to have overcome flow system flow pulsation that existing oil hydraulic pump causes and the problem of pressure pulsation, and a kind of staggered phase parallel combined plunger-type hydraulic pump is provided.

For solving the problems of the technologies described above, the present invention adopts following technological scheme to realize: a kind of staggered phase parallel combined plunger-type hydraulic pump, described staggered phase parallel combined plunger-type hydraulic pump comprises axial piston pump No. 1, No. 2 axial piston pumps, No. 3 axial piston pumps, ..., M-1 axial piston pump, M axial piston pump, No. 1 output synchronous pulley, No. 2 input synchronous pulleys, No. 2 output synchronous pulleys, No. 3 input synchronous pulleys, No. 3 output synchronous pulleys, No. 4 input synchronous pulleys, No. 4 output synchronous pulleys, No. 5 input synchronous pulleys, ..., No. M-1 input synchronous pulley, No. M-1 output synchronous pulley, No. M input synchronous pulley, Timing Belt, 2 to No. 3 Timing Belts, 3 to No. 4 Timing Belts, ... with M-1 to M Timing Belt, M-1 the Idle wheel that structure is identical, 2M-2 expansion connecting sleeve and the servomotor that structure is identical, wherein M is more than or equal to 2 natural number.

No. 1 axial piston pump, No. 2 axial piston pumps, No. 3 axial piston pumps, ..., M-1 axial piston pump and M axial piston pump are arranged on parallel combination pump mounting plate in vertical position by bolt, No. 1 axial piston pump, No. 2 axial piston pumps, No. 3 axial piston pumps, ..., the rotational axis of M-1 axial piston pump and M axial piston pump is parallel to each other and locates in same level, No. 1 axial piston pump, No. 2 axial piston pumps, No. 3 axial piston pumps, ..., No. 1 transmission shaft in M-1 axial piston pump and M axial piston pump, No. 2 transmission shafts, No. 3 transmission shafts, ..., the input end of M-1 transmission shaft and M transmission shaft is positioned at right side.No. 1 output synchronous pulley is fixedly mounted on the input end of No. 1 transmission shaft by the identical expansion connecting sleeve of structure, No. 2 input synchronous pulleys with export synchronous pulley for No. 2 and be fixedly mounted on the input end of No. 2 transmission shafts by the identical expansion connecting sleeve of 2 structures, No. 3 input synchronous pulleys with export synchronous pulley for No. 3 and be fixedly mounted on the input end of No. 3 transmission shafts by the identical expansion connecting sleeve of 2 structures, No. 4 input synchronous pulleys with export synchronous pulley for No. 4 and be fixedly mounted on the input end of No. 4 transmission shafts by the identical expansion connecting sleeve of 2 structures, ..., No. M-1 input synchronous pulley with export synchronous pulley for No. M-1 and be fixedly mounted on the input end of M-1 transmission shaft by the identical expansion connecting sleeve of 2 structures, No. M input synchronous pulley is fixedly mounted on the input end of M transmission shaft by the identical expansion connecting sleeve of structure.No. 1 output synchronous pulley is connected by Timing Belt with No. 2 input synchronous pulleys, No. 2 output synchronous pulley is connected by 2 to No. 3 Timing Belts with No. 3 input synchronous pulleys, No. 3 output synchronous pulley is connected by 3 to No. 4 Timing Belts with No. 4 input synchronous pulleys, No. 4 output synchronous pulley is connected by 4 to No. 5 Timing Belts with No. 5 input synchronous pulleys, ..., No. M-1 output synchronous pulley is connected by M-1 to M Timing Belt with No. M input synchronous pulley.Timing Belt, 2 to No. 3 Timing Belts, 3 to No. 4 Timing Belts ... with the outside of M-1 to M Timing Belt, Idle wheel that structure is identical is installed and is connected for contact.No. 1 axial piston pump, No. 2 axial piston pumps, No. 3 axial piston pumps ..., M-1 axial piston pump adopts pipeline be connected and be connected with fuel tank with the axial fuel inlet mouth in M axial piston pump, No. 1 axial piston pump, No. 2 axial piston pumps, No. 3 axial piston pumps ..., M-1 axial piston pump is connected and is connected with hydraulic system with the axial force feed mouth employing pipeline in M axial piston pump.The input end of No. 1 transmission shaft of No. 1 axial piston pump or the M transmission shaft of M axial piston pump connects servomotor by coupling, axial plunger on the pump housing of a rear axial piston pump of adjacent two axial piston pumps from No. 1 axial piston pump to M axial piston pump is 1 misphase parallactic angle β with respect to the axial plunger on the pump housing of previous axial piston pump

the unit of misphase parallactic angle β in formula is radian,

If by angle calculation, above formula is expressed as

No. 1 axial piston pump described in technological scheme, No. 2 axial piston pumps, No. 3 axial piston pumps ..., M-1 axial piston pump is identical with M axial plunger pump structure.No. 1 output synchronous pulley, No. 2 input synchronous pulleys, No. 2 output synchronous pulleys, No. 3 input synchronous pulleys, No. 3 output synchronous pulleys, No. 4 input synchronous pulleys, No. 4 output synchronous pulleys, No. 5 input synchronous pulleys ..., No. M-1 output synchronous pulley be with to input synchronous belt wheel structure No. M identical.Timing Belt, 2 to No. 3 Timing Belts, 3 to No. 4 Timing Belts ... identical with M-1 to M Timing Belt structure.

A kind of staggered phase parallel combined plunger-type hydraulic pump, described staggered phase parallel combined plunger-type hydraulic pump comprises radial plunger pump No. 1, No. 2 radial plunger pumps, No. 3 radial plunger pumps, ..., M-1 radial plunger pump, M radial plunger pump, radially export synchronous pulley No. 1, radially input synchronous pulley No. 2, radially export synchronous pulley No. 2, radially input synchronous pulley No. 3, radially export synchronous pulley No. 3, radially input synchronous pulley No. 4, radially export synchronous pulley No. 4, radially input synchronous pulley No. 5, ..., radially input synchronous pulley No. M-1, radially export synchronous pulley No. M-1, radially input synchronous pulley No. M, Timing Belt radially, 2 to No. 3 Timing Belts radially, 3 to No. 4 Timing Belts radially, ... with M-1 to M number Timing Belt radially, M-1 the Idle wheel that structure is identical, 2M-2 expansion connecting sleeve and the servomotor that structure is identical, wherein M is more than or equal to 2 natural number.

No. 1 radial plunger pump, No. 2 radial plunger pumps, No. 3 radial plunger pumps, ..., M-1 radial plunger pump and M radial plunger pump are arranged on parallel combination radial pump mounting plate in vertical position by bolt, No. 1 radial plunger pump, No. 2 radial plunger pumps, No. 3 radial plunger pumps, ..., the rotational axis of M-1 radial plunger pump and M radial plunger pump is parallel to each other and locates in same level, No. 1 radial plunger pump, No. 2 radial plunger pumps, No. 3 radial plunger pumps, ..., in M-1 radial plunger pump and M radial plunger pump No. 1 transmission shaft radially, No. 2 transmission shafts radially, No. 3 transmission shafts radially, ..., No. M-1 radially transmission shaft and No. M radially the input end of transmission shaft be positioned at right side.Radially export synchronous pulley for No. 1 and be fixedly mounted on No. 1 radially on the input end of transmission shaft by the identical expansion connecting sleeve of structure, radially input synchronous pulley for No. 2 and radially export synchronous pulley for No. 2 and be fixedly mounted on No. 2 radially on the input end of transmission shaft by the identical expansion connecting sleeve of 2 structures, radially input synchronous pulley for No. 3 and radially export synchronous pulley for No. 3 and be fixedly mounted on No. 3 radially on the input end of transmission shaft by the identical expansion connecting sleeve of 2 structures, radially input synchronous pulley for No. 4 and radially export synchronous pulley for No. 4 and be fixedly mounted on No. 4 radially on the input end of transmission shaft by the identical expansion connecting sleeve of 2 structures, ..., radially input synchronous pulley for No. M-1 and radially export synchronous pulley for No. M-1 and be fixedly mounted on No. M-1 radially on the input end of transmission shaft by the identical expansion connecting sleeve of 2 structures, radially input synchronous pulley for No. M and be fixedly mounted on No. M radially on the input end of transmission shaft by the identical expansion connecting sleeve of structure.Radially export synchronous pulley for No. 1 and radially input synchronous pulley for No. 2 and be connected by Timing Belt radially, radially export for No. 2 synchronous pulley with radially input for No. 3 synchronous pulley by 2 to No. 3 radially Timing Belt be connected, radially export for No. 3 synchronous pulley with radially input for No. 4 synchronous pulley by 3 to No. 4 radially Timing Belt be connected, radially export for No. 4 synchronous pulley with radially input for No. 5 synchronous pulley by 4 to No. 5 radially Timing Belt be connected, ..., radially export for No. M-1 synchronous pulley with radially input for No. M synchronous pulley by M-1 to M number radially Timing Belt be connected.Radially Timing Belt, 2 to No. 3 radially Timing Belt, 3 to No. 4 radially Timing Belt ... with M-1 to M number radially the outside of Timing Belt Idle wheel that structure is identical be installed connected for contact.No. 1 radial plunger pump, No. 2 radial plunger pumps, No. 3 radial plunger pumps ..., M-1 radial plunger pump adopts pipeline be connected and be connected with fuel tank with the radially filler opening in M radial plunger pump, No. 1 radial plunger pump, No. 2 radial plunger pumps, No. 3 radial plunger pumps ..., M-1 radial plunger pump is connected and is connected with hydraulic system with the radially force feed mouth employing pipeline in M radial plunger pump.No. 1 of No. 1 radial plunger pump radially transmission shaft or M radial plunger pump No. M radially the input end of transmission shaft by coupling, connect servomotor.From No. 1 radially transmission shaft to the radial plunger on the pump housing of a rear radial plunger pump of adjacent two radial plunger pumps M radial plunger pump with respect to the radial plunger on the pump housing of previous radial plunger pump, be 1 misphase parallactic angle β,

the unit of misphase parallactic angle β in formula is radian,

If by angle calculation, above formula is expressed as

No. 1 radial plunger pump described in technological scheme, No. 2 radial plunger pumps, No. 3 radial plunger pumps ..., M-1 radial plunger pump is identical with M radial plunger pump structure.Radially export synchronous pulley for No. 1, radially input synchronous pulley for No. 2, radially export synchronous pulley for No. 2, radially input synchronous pulley for No. 3, radially export synchronous pulley for No. 3, radially input synchronous pulley for No. 4, radially export synchronous pulley for No. 4, radially input synchronous pulley for No. 5 ..., radially input synchronous pulley for No. M-1, radially export synchronous pulley for No. M-1 and radially to input synchronous belt wheel structure No. M identical.Radially Timing Belt, 2 to No. 3 radially Timing Belt, 3 to No. 4 radially Timing Belt ... radially Timing Belt structure is identical with M-1 to M number.

Compared with prior art the invention has the beneficial effects as follows:

1. staggered phase parallel combined plunger-type hydraulic pump of the present invention adopts specifications and models, performance parameter, plunger pump that plunger number is identical in parallel, by changing the phase beta that is staggered when the deflection angle of adjacent two plunger pumps in parallel makes adjacent two plunger pumps output, β=2 π/(MZ), wherein: the plunger number that Z is single pump, M is plunger pump number, doubly, flow pulse rate is about the 1/M of single pump to the M of the flow that now specified output flow is single pump ².

2. staggered phase parallel combined plunger-type hydraulic pump of the present invention is given hydraulic system fuel feeding simultaneously, does not need specialized designs to manufacture multi-plunger oil hydraulic pump, can in the time of augmented flow, reduce pulsation, improves hydraulic work system performance and stability.

3. the transmission of staggered phase parallel combined plunger-type hydraulic pump of the present invention does not need special-purpose driving mechanism, the identical synchronous pulley of Dimensions that each is arranged on each plunger pump input shaft links together by Timing Belt, makes synchronous, the equidirectional rotation of each plunger pump in parallel and while to hydraulic system fuel feeding.

Accompanying drawing explanation

Below in conjunction with accompanying drawing, the present invention is further illustrated:

Fig. 1 adopts axial plunger type hydraulic pump to form the plan view that staggered phase parallel combined plunger-type hydraulic pump of the present invention is misphase position parallel combination axial plunger type hydraulic pump structure and principle;

Fig. 2-c is the sectional view at B-B place in the misphase position parallel combination axial plunger type hydraulic pump shown in Fig. 1;

Fig. 2-d is the sectional view at A-A place in the misphase position parallel combination axial plunger type hydraulic pump shown in Fig. 1;

Fig. 2-e is the sectional view at C-C place in the misphase position parallel combination axial plunger type hydraulic pump shown in Fig. 1;

Fig. 3 is the experimental liquid hydraulic circuit schematic diagram of staggered phase parallel combined plunger-type hydraulic pump of the present invention;

Fig. 4 adopts radial plunger pump to form the plan view that staggered phase parallel combined plunger-type hydraulic pump of the present invention is misphase position parallel combination radial plunger type hydraulic pump structure and principle;

Fig. 5 is the sectional view at D-D place in the misphase position parallel combination radial plunger type oil hydraulic pump shown in Fig. 4;

Fig. 6 adopts three axial piston pumps to form the plan view that staggered phase parallel combined plunger-type hydraulic pump of the present invention is misphase position parallel combination axial plunger type hydraulic pump structure and principle;

Fig. 7 is the sectional view that Fig. 6 adopts E-E place in the misphase position parallel combination axial plunger type hydraulic pump that three axial piston pumps form;

Fig. 8 is axial (radially) pluger type hydraulic pump fuel supply flow rate pulsation curves figure of misphase position parallel combination that adopts three axial (radially) plunger pumps to form;

Fig. 9 adopts three radial plunger pumps to form the plan view that staggered phase parallel combined plunger-type hydraulic pump of the present invention is misphase position parallel combination radial plunger type hydraulic pump structure and principle;

Figure 10 is the sectional view that Fig. 9 adopts F-F place in the misphase position parallel combination radial plunger type oil hydraulic pump that three radial plunger pumps form;

Figure 11 is that M axial piston pump of employing forms the plan view that staggered phase parallel combined plunger-type hydraulic pump of the present invention is each input, the installation of output synchronous pulley and annexation in the parallel combination axial plunger type hydraulic pump of misphase position, and M is more than or equal to 4 odd number;

Figure 12 is that M axial piston pump of employing forms the plan view that staggered phase parallel combined plunger-type hydraulic pump of the present invention is each input, the installation of output synchronous pulley and annexation in the parallel combination axial plunger type hydraulic pump of misphase position, and M is more than or equal to 4 even number;

Figure 13 is that M radial plunger pump of employing forms the plan view that staggered phase parallel combined plunger-type hydraulic pump of the present invention is each input, the installation of output synchronous pulley and annexation in the parallel combination radial plunger type oil hydraulic pump of misphase position, and M is more than or equal to 4 odd number;

Figure 14 is that M radial plunger pump of employing forms the plan view that staggered phase parallel combined plunger-type hydraulic pump of the present invention is each input, the installation of output synchronous pulley and annexation in the parallel combination radial plunger type oil hydraulic pump of misphase position, and M is more than or equal to 4 even number;

Figure 15 is axial (radially) pluger type hydraulic pump fuel supply flow rate pulsation curves figure of misphase position parallel combination that adopts five axial (radially) plunger pumps to form;

Figure 16 is the partial enlarged drawing at the G place in Figure 15;

In figure: No. 1.2 input synchronous pulleys, No. 2.2 swash plates, No. 3.2 axial plungers, No. 4.2 transmission shafts, No. 5.2 pump housings, No. 6.2 oil distribution casings, 7. Timing Belt, No. 8.1 axial plungers, No. 9.1 output synchronous pulleys, 10.1 number transmission shaft, 11.1 number oil distribution casing, 12.1 number pump housing, 13.1 number swash plate, 14. Idle wheels, 15. expansion connecting sleeves, 16. pressure gauges, 17. relief valves, 18. servomotors, 19.1 number axial piston pump, 20.2 number stator, 21.2 number radial plunger, 22.2 number rotor, 23.2 number oil distributing shaft, 24.1 number stator, 25.1 number radial plunger, 26.1 number rotor, 27.1 number oil distributing shaft, No. 28.2 transmission shafts radially, radially input synchronous pulley No. 29.2, radially export synchronous pulley No. 30.1, No. 31.1 transmission shafts radially, 32. parallel combination pump mounting plates, 33.2 number axial piston pump, 34.1 number radial plunger pump, 35.2 number radial plunger pump, 36. Timing Belts radially, 37.3 number axial piston pump, 38.M-1 axial piston pump, 39.M axial piston pump, 40.3 number radial plunger pump, 41. parallel combination radial pump mounting plates, 42.M-1 radial plunger pump, 43.M radial plunger pump, a. axial fuel inlet mouth, b. axial force feed mouth, m. filler opening radially, n. force feed mouth radially.

Embodiment

The present invention proposes a kind of parallel combination pluger type hydraulic pump, its basic structure is to adopt two or more specifications and models, performance ginseng flow number, plunger hydraulic parallel connection of pumps that plunger number is identical, by mechanical drive mode make the transmission shaft of a plurality of pluger type hydraulic pumps synchronous, equidirectional rotation.The plunger of every two adjacent pluger type hydraulic pumps is at the circumferential distribution angle beta that is staggered, β=2 π/(MZ), the plunger number that Z is single pluger type hydraulic pump, the number that M is pluger type hydraulic pump.Single plunger hydraulic pumping flow pulsation is large, the problem of underfed in order to solve for parallel combination pluger type hydraulic pump, the specified output flow of parallel combination pluger type hydraulic pump is M times of single plunger type hydraulic pump duty, and flow pulse rate is about the 1/M of single plunger type hydraulic pump ².

Parallel combination pluger type hydraulic pump both can be by axial piston pump parallel combination, also can be by radial plunger pump parallel combination.Below in conjunction with accompanying drawing, the structure of staggered phase parallel combined plunger-type hydraulic pump of the present invention and annexation are described further:

1. misphase position parallel combination axial plunger type hydraulic pump

Consult Fig. 1, Fig. 2-c, Fig. 2-d and Fig. 2-e, staggered phase parallel combined plunger-type hydraulic pump of the present invention can be to consist of M specification, model, axial piston pump and mechanical transmissioning piece that performance parameter is identical, and wherein M gets the natural number that is more than or equal to 2.In figure, with two specifications, model, performance parameter identical No. 1 axial piston pump 19 and No. 2 axial piston pumps 33, implement to be connected in parallel, they comprise basic building block is 5, No. 1 pump housing 12 of No. 2 pump housings, 3, No. 1 axial plunger 8 of No. 2 axial plungers, 2, No. 1 swash plate 13 of No. 2 swash plates, No. 2 oil distribution casing 11, No. 2 transmission shafts 4 of 6, No. 1 oil distribution casing and No. 1 transmission shaft 10.No. 1 axial piston pump No. 2 input synchronous pulleys 1 and No. 1 output synchronous pulley 9 identical with physical dimension of power intake fixed installation with the transmission shaft motion of No. 2 axial piston pumps, No. 2 input synchronous pulleys 1 are with and are connected by Timing Belt 7 realizations with No. 1 output synchronous pulley 9, make that No. 1 axial piston pump can be synchronizeed with No. 2 axial piston pumps, equidirectional rotation.Idle wheel 14 has been installed in Timing Belt 7 one outsides.Axial fuel inlet mouth a in 2 axial piston pumps adopts pipeline link together and be connected and realize oil suction with fuel tank, and the axial force feed mouth b in 2 axial piston pumps adopts pipeline link together and be connected to its fuel feeding with hydraulic system.

No. 1 pump housing 12 of No. 1 axial piston pump 19 and No. 2 axial piston pumps 33 and No. 2 pump housings 5 be circumferentially evenly equipped with Z No. 1 axial plunger 8 and No. 2 axial plungers 3, shown in figure, be Z=5.Wherein No. 2 axial plungers 3 on No. 2 pump housings 12 are 1 misphase parallactic angle circumferentially distributing (being called for short misphase parallactic angle) β with respect to No. 1 axial plunger 8 on No. 1 pump housing 5.Be that No. 1 axial plunger 8 being positioned in Fig. 1 on No. 1 pump housing 12 that No. 2 axial plungers 3 on the pump housing 5 of No. 2, top are positioned at bottom is relatively 1 misphase parallactic angle β.Misphase parallactic angle β is calculated as follows value

$\mathrm{\β}=\frac{\mathrm{\π}}{Z}---\left(1\right)$

The misphase position angular unit of formula (1) is radian, if by angle calculation, above formula is expressed as

Shown in Fig. 1, be the basic structure that forms misphase position parallel combination axial plunger type hydraulic pump.During work, servomotor 18 inputs to No. 1 transmission shaft 10 or No. 2 transmission shafts 4 by motion and power, drives No. 1 pump housing 12 and No. 2 pump housings 5 to rotate with rotational speed omega.No. 1 axial piston pump 19 and No. 2 axial piston pumps i.e. axial fuel inlet mouth a inhalant liquid force feed from No. 1 oil distribution casing 11 and No. 2 oil distribution casings 6, from axial force feed mouth b pressure oil output.

According to the working principle of axial piston pump, the output flow of the misphase position parallel combination axial plunger type hydraulic pump consisting of two same specification models is calculated as follows, the actual flow of the axial piston pump that is odd number for axial plunger number:

$Q=\frac{\mathrm{\&pi;}}{4}{\mathrm{<figure-callout\; id="2"\; label="d"\; filenames="HDA0000116446070000032.png"\; state="\{\{state\}\}">d</figure-callout>}}^2\mathrm{zRn}\tan \mathrm{\&alpha;}{\mathrm{\&eta;}}_v$

In formula: Z-1 axial plunger number;

D-1 axial plunger diameter, unit, mm;

The R-1 axial plunger circle radius that circumferentially distributes, unit, mm;

No. 1 swashplate angle of α-No. 1 axial piston pump, unit, degree;

The rotating speed of n-1 axial piston pump, unit, r/m;

η _vthe volumetric efficiency of-No. 1 axial piston pump;

According to flow pulsation definition and geometrical relationship, the axial piston pump of installing for misphase position, when misphase parallactic angle is

time, calculate flow pulsation coefficient,

and when misphase parallactic angle β=0, $\mathrm{\&delta;}=1-\cos \frac{\mathrm{\&pi;}}{2Z},$

Ratio is made on above-mentioned two formula the right:

$\frac{1-\cos \frac{\mathrm{\&pi;}}{2Z}}{1-\cos \frac{\mathrm{\&pi;}}{4Z}}=2(1+\cos \frac{\mathrm{\&pi;}}{4Z})\&ap;4{|}_{Z=3~9}$

Conclusion: misphase position parallel combination axial plunger type hydraulic POF average is identical with non-misphase position parallel combination axial plunger type hydraulic POF average, but flow pulsation amplitude reduces, flow pulse rate is about 1/4 of non-misphase position parallel combination axial plunger type hydraulic pumping flow pulsation rate.

The misphase parallactic angle β of above-mentioned misphase position parallel combination axial plunger type hydraulic pump, can reach requirement by adjusting the circumferential relative position of No. 2 pump housings 5 and No. 1 pump housing 12.The method of adjusting is to make in No. 2 input synchronous pulleys 1 and No. 1 output synchronous pulley 9 one with respect to fastening again after a misphase parallactic angle β of another rotation.To relatively rotate the method for a misphase parallactic angle β relevant with the Placement of synchronous pulley and transmission shaft with exporting synchronous pulley 9 for No. 1 to make No. 2 input synchronous pulleys 1, the expansion connecting sleeve 15 that in embodiments of the invention, between No. 2 input synchronous pulleys 1 and No. 2 transmission shafts 4 and No. 1 output synchronous pulley 9 and No. 1 transmission shaft 10, all the structure of employing is identical is connected, when needs are adjusted misphase parallactic angle β, can unclamp expansion connecting sleeve 15, can carry out continuous stepless and regulate misphase parallactic angle β size.

Synchronous pulley (9, No. 2 input synchronous pulleys 1 of No. 1 output synchronous pulley) can adopt key Placement with being connected also of transmission shaft (10, No. 2 transmission shafts 4 of No. 1 transmission shaft), this mode can have level to regulate to misphase parallactic angle β, minimum rotation angular displacement is that No. 1 output synchronous pulley 9 and No. 2 input synchronous pulleys 1 relatively rotate a tooth

$\mathrm{\&theta;}=\frac{2\mathrm{\&pi;}}{Z_1}---\left(2\right)$

Z wherein ₁it is the number of teeth of No. 1 output synchronous pulley 9 or No. 2 input synchronous pulleys 1.In formula (2), misphase position angular unit is radian, if by angle calculation, above formula is expressed as

For existing oil hydraulic pump, can differentiate as follows the circumferential phase state of current plungers pump plunger:

Consult Fig. 3, according to the structure of the oil hydraulic circuit shown in figure, form hydraulic system, servomotor 18 drives staggered phase parallel combined plunger-type hydraulic pump, and relief valve 17 is adjusted to lower force value (5MPa), makes the rotating speed of servomotor 18 at 500rpm.Observe the beat of pointer situation of pressure gauge 16, according to beat of pointer situation, repeatedly adjust No. 1 pump housing 12 on No. 1 axial piston pump 19 and No. 2 axial piston pumps and the misphase parallactic angle β of No. 2 pump housing 5 upper plugs, until the beat of pointer amplitude of pressure gauge 16 reaches minimum.

Pressure gauge 16 in figure in oil hydraulic circuit, also can be replaced with pressure transducer, observes pressure change by electronic pressure indicating meter.

2. misphase position parallel combination radial plunger type oil hydraulic pump

Consult Fig. 4 and Fig. 5, staggered phase parallel combined plunger-type hydraulic pump of the present invention also can consist of M specification, model, radial plunger pump and mechanical transmissioning piece that performance parameter is identical, and wherein M gets the natural number that is more than or equal to 2.In figure, with two specifications, model, performance parameter identical No. 1 radial plunger pump 34 and No. 2 radial plunger pumps 35, implement to be connected in parallel, they comprise basic building block is 20, No. 1 stator 24 of No. 2 stators, 21, No. 1 radial plunger 25 of No. 2 radial plungers, No. 27,2,23, No. 1 oil distributing shaft of 26, No. 2 oil distributing shafts of 22, No. 1 rotor of No. 2 rotors is transmission shaft 28 and No. 1 transmission shaft 31 radially radially.No. 1 radially transmission shaft 31 and No. 2 radially 1 identical radially exporting synchronous pulley 30 for No. 1 and radially inputs synchronous pulley 29 No. 2 of Dimensions of input end fixed installation of transmission shaft 28 of No. 1 radial plunger pump 34 and No. 2 radial plunger pumps 35, radially export synchronous pulley 30 for No. 1 and be connected with radially inputting for No. 2 between synchronous pulley 29 by Timing Belt 36 radially, make that No. 1 radial plunger pump 34 can be synchronizeed with No. 2 radial plunger pumps 35, equidirectional rotation.No. 1 radial plunger pump 34 adopts pipeline link together and be connected and realize oil suction with fuel tank with the radially filler opening m in No. 2 radial plunger pumps 35, and the radially force feed mouth n in No. 1 radial plunger pump 34 and No. 2 radial plunger pumps 35 adopts pipeline link together and be connected to its fuel feeding with hydraulic system.

No. 1 rotor 26 of No. 1 radial plunger pump 34 and No. 2 radial plunger pumps 35 and No. 2 rotors 22 be circumferentially evenly equipped with Z No. 1 radial plunger 25 and No. 2 radial plungers 21, shown in Fig. 4, be Z=5.Wherein No. 2 radial plungers 21 on No. 2 rotors 22 are a misphase parallactic angle β with respect to No. 1 radial plunger 25 on No. 1 rotor 26.Be that No. 2 radial plungers 21 on No. 2 rotors 22 of Fig. 5 middle and upper part are a misphase parallactic angle β with respect to No. 1 radial plunger 25 on No. 1 rotor 26 of bottom.β calculates value by formula (1):

$\mathrm{\&beta;}=\frac{\mathrm{\&pi;}}{Z}$

By angle, represent

The transmission of power of transmission shaft, employing toothed belt transmission identical with above-mentioned axial piston pump; Phase judgment method is also identical with axial piston pump with the computational methods of misphase parallactic angle.

According to the working principle of radial plunger pump, the output flow of the misphase position parallel combination radial plunger type oil hydraulic pump consisting of two same specification models is calculated as follows, the actual output flow of the radial plunger pump that is odd number for radial plunger number:

$Q=\frac{\mathrm{\&pi;}}{2}{\mathrm{<figure-callout\; id="2"\; label="d"\; filenames="HDA0000116446070000032.png"\; state="\{\{state\}\}">d</figure-callout>}}^2\mathrm{eZn}{\mathrm{\&eta;}}_v$

In formula: Z-1 radial plunger number;

The throw of eccentric of e-1 rotor and No. 1 stator, unit, mm;

η _vthe volumetric efficiency of-No. 1 radial plunger pump;

The rotating speed of n-1 radial plunger pump, unit, r/m;

D-1 radial plunger diameter, unit, mm;

When the throw of eccentric of 24 of No. 1 rotor 26 of No. 1 radial plunger pump 34 and No. 1 stators is e, No. 1 radial plunger 25 is in completing once suction, oil extraction process, during dead center position in oil-absorbing process, stretch out plunger the longest, during dead center position in oil extraction process, stretch out plunger the shortest, the range of No. 1 radial plunger is 2e.

According to flow pulsation definition and geometrical relationship, the radial plunger pump of installing for misphase position, when misphase parallactic angle is

time, calculate flow pulsation coefficient,

and when misphase parallactic angle β=0, $\mathrm{\&delta;}={2\mathrm{<figure-callout\; id="2"\; label="tg"\; filenames="HDA0000116446070000032.png"\; state="\{\{state\}\}">tg</figure-callout>}}^2\frac{\mathrm{\&pi;}}{2Z},$

Ratio is made on above-mentioned two formula the right:

$\frac{{2\mathrm{<figure-callout\; id="2"\; label="tg"\; filenames="HDA0000116446070000032.png"\; state="\{\{state\}\}">tg</figure-callout>}}^2\frac{\mathrm{\&pi;}}{2\mathrm{<figure-callout\; id="2"\; label="Z"\; filenames="HDA0000116446070000032.png"\; state="\{\{state\}\}">Z</figure-callout>}}}{{2\mathrm{<figure-callout\; id="2"\; label="tg"\; filenames="HDA0000116446070000032.png"\; state="\{\{state\}\}">tg</figure-callout>}}^2\frac{\mathrm{\&pi;}}{4Z}}\&ap;\frac{1-\cos \frac{\mathrm{\&pi;}}{Z}}{1-\cos \frac{\mathrm{\&pi;}}{2Z}}=2(1+\cos \frac{\mathrm{\&pi;}}{2Z})\&ap;4{|}_{Z=5~9}$

Conclusion: misphase position parallel combination radial plunger type oil hydraulic pump output flow average is identical with non-misphase position parallel combination radial plunger type oil hydraulic pump output flow average, but flow pulsation amplitude reduces, flow pulse rate can reach 1/4 of non-misphase position parallel combination radial plunger type oil hydraulic pump.

3. adopt axial piston pump or the radial plunger pump that plural specifications and models are identical with performance parameter to form staggered phase parallel combined plunger-type hydraulic pump

Such staggered phase parallel combined plunger-type hydraulic pump forms main points:

1) the plunger number of each pluger type hydraulic pump is identical;

2) transmission shaft of each pluger type hydraulic pump must can synchronous, equidirectional rotation;

3) the misphase parallactic angle β of the axial plunger of adjacent two pluger type hydraulic pumps or radial plunger is undertaken by following rule: $\mathrm{\&beta;}=\frac{2\mathrm{\&pi;}}{\mathrm{MZ}}$

Adopt three axial piston pumps to form described staggered phase parallel combined plunger-type hydraulic pump:

Consulting Fig. 6 and Fig. 7, is three described staggered phase parallel combined plunger-type hydraulic pumps of axial piston pumps composition of employing shown in figure.In embodiment, the rated flow of each axial piston pump is 2.5L/min, rated working pressure is 63MPa, the axial plunger of axial piston pump is counted Z=5, and 19, No. 2 axial piston pumps 33 of No. 1 axial piston pump are as all identical in specification, model, performance parameter with other all technical parameters of No. 3 axial piston pumps 37.19, No. 2 axial piston pumps 33 of No. 1 axial piston pump and No. 3 axial piston pumps 37 are arranged on parallel combination pump mounting plate 32 in vertical position by bolt and locating stud, make the rotational axis of 19, No. 2 axial piston pumps 33 of No. 1 axial piston pump and No. 3 axial piston pumps 37 be parallel to each other and locate in same level, the input end of 19, No. 2 axial piston pumps 33 of No. 1 axial piston pump and 10, No. 2 transmission shafts 4 of No. 1 transmission shaft and No. 3 transmission shafts in No. 3 axial piston pumps 37 towards consistent be that input end is positioned at right side.19, No. 2 axial piston pumps 33 of No. 1 axial piston pump are connected by toothed belt transmission mode with No. 3 transmission shafts with 10, No. 2 transmission shafts 4 of No. 1 transmission shaft of No. 3 axial piston pumps 37.Exactly, the input end of No. 1 transmission shaft 10 of No. 1 axial piston pump 19 is by No. 1 output synchronous pulley 9 of expansion connecting sleeve 15 fixed installation, the input end of No. 2 transmission shafts 4 of No. 2 axial piston pumps 33 is by 2 No. 2 input synchronous pulleys 1 of expansion connecting sleeve 15 fixed installation and No. 2 output synchronous pulleys that structure is identical, the input end of No. 3 transmission shafts of No. 3 axial piston pumps 37, by No. 3 input synchronous pulleys of expansion connecting sleeve 15 fixed installation, will be installed No. 3 output synchronous pulleys (being positioned at the left side of No. 3 input synchronous pulleys) while having No. 4 axial piston pumps.Between No. 2 input synchronous pulleys 1 on No. 2 transmission shafts 4 of on No. 1 transmission shaft 10 of No. 1 axial piston pump 19 No. 1 output synchronous pulley 9 and No. 2 axial piston pumps 33, adopt Timing Belt 7 to be connected, inputting between synchronous pulleys for No. 3 on No. 3 transmission shafts exporting synchronous pulley and No. 3 axial piston pumps 37 for No. 2 on No. 2 transmission shafts 4 of No. 2 axial piston pumps 33 adopts 2 to No. 3 Timing Belts to be connected.An Idle wheel 14 that structure is identical is installed in one outside of each Timing Belt.The input end of No. 1 transmission shaft 10 of No. 1 axial piston pump 19 is connected with servomotor 18 by coupling, and servomotor 18 rotates, and drives that 10, No. 2 transmission shafts 4 of No. 1 transmission shaft are synchronizeed with No. 3 transmission shafts, equidirectional rotation.No. 1 axial piston pump 19, No. 1 pump housing 12 of No. 2 axial piston pumps 33 and No. 3 axial piston pumps 37, No. 2 pump housings 5 with on No. 3 pump housings, be circumferentially all evenly equipped with 5 No. 1 axial plungers 8 that structure is identical, No. 2 axial plungers 3 and No. 3 axial plungers, No. 2 axial plungers 3 No. 1 axial plunger 8 identical with respect to 5 structures on No. 1 pump housing 12 in No. 1 axial piston pump 19 that wherein 5 structures on No. 2 pump housings 5 in No. 2 axial piston pumps 33 are identical is 1 misphase parallactic angle β, identical No. 3 axial plungers No. 2 axial plungers 3 identical with respect to 5 structures on No. 2 pump housings 5 in No. 2 axial piston pumps 33 of 5 structures on No. 3 pump housings in No. 3 axial piston pumps 37 are 1 misphase parallactic angle β.The input end of No. 1 transmission shaft 10 of No. 1 axial piston pump 19 connects servomotor 18 by coupling, certainly, also can by coupling, connect servomotor 18 at No. 2 transmission shafts 4 of No. 2 axial piston pumps 33 or No. 3 axial piston pumps 37 or the input end of No. 3 transmission shafts.19, No. 2 axial piston pumps 33 of No. 1 axial piston pump adopt pipeline link together and be connected and realize oil suction with fuel tank with the axial fuel inlet mouth a in No. 3 axial piston pumps 37, and the axial force feed mouth b in 19, No. 2 axial piston pumps 33 of No. 1 axial piston pump and No. 3 axial piston pumps 37 adopts pipeline link together and be connected to its fuel feeding with hydraulic system.

The basic parameter of the servomotor 18 in embodiment is rated power 5kW, rated speed 2000rpm, nominal torque 23Nm.The rated flow 7.5L/min of staggered phase parallel combined plunger-type hydraulic pump, rated working pressure 58MPa.No. 1 axial plunger of No. 1 axial piston pump 19 is counted to Z=5 substitution formula (1) and calculate the axial plunger misphase parallactic angle β=2 π/15=24 ° in staggered phase parallel combined plunger-type hydraulic pump.By after 19, No. 2 axial piston pumps 33 of No. 1 axial piston pump and No. 3 axial piston pump 37 connections, set up the hydraulic system shown in Fig. 3, according to said method, differentiate the circumferential phase place of axial plunger, and by the circumferential relative position of adjacent two axial piston pumps of expansion connecting sleeve 15 change, making the misphase parallactic angle β between No. 2 axial piston pumps 33 and No. 1 axial piston pump 19 is 24 °, and the misphase parallactic angle β between No. 3 axial piston pumps 37 and No. 2 axial piston pumps 33 is 24 °.

Consult Fig. 8, during single axial plunger oil pump feed, the flow of this axial piston pump is with T ₁=π/5 are cycle variation, and its flow pulsation is Q ₁=4.89%Q _max; 19, No. 2 axial piston pumps 33 of No. 1 axial piston pump are connected fuel feeding with No. 3 axial piston pump 37 misphase in parallel positions, output flow is 19, No. 2 axial piston pumps 33 of No. 1 axial piston pump and No. 3 axial piston pump 37 flow sums, the flow pulsation cycle is reduced to 1/3, is T ₂=π/15, flow pulsation is about Q ₂=0.535%Q ' _max, can show that 19, No. 2 axial piston pumps 33 of No. 1 axial piston pump are about 1/3 of single axial piston pump with the flow pulsation of No. 3 axial piston pump 37 gained in parallel ², 1/9.As shown in FIG..

Adopt three radial plunger pumps to form described staggered phase parallel combined plunger-type hydraulic pump:

Consult Fig. 9 and Figure 10, in embodiment, the rated flow of each radial plunger pump is 2.5L/min, rated working pressure is 63MPa, the radial plunger of radial plunger pump is counted Z=5, and 34, No. 2 radial plunger pumps 35 of No. 1 radial plunger pump are as all identical in specification, model, performance parameter with other all technical parameters of No. 3 radial plunger pumps 40.34, No. 2 radial plunger pumps 35 of No. 1 radial plunger pump and No. 3 radial plunger pumps 40 are arranged on parallel combination radial pump mounting plate 41 in vertical position by bolt and locating stud, make the rotational axis of 34, No. 2 radial plunger pumps 35 of No. 1 radial plunger pump and No. 3 radial plunger pumps 40 be parallel to each other and locate in same level, 34, No. 2 radial plunger pumps 35 of No. 1 radial plunger pump with in No. 3 radial plunger pumps 40 No. 1 radially No. 31,2, transmission shaft radially transmission shaft 28 and No. 3 radially transmission shaft input end towards consistent be that input end is positioned at right side.By No. 1 of 34, No. 2 radial plunger pumps 35 of No. 1 radial plunger pump and No. 3 radial plunger pumps 40 radially No. 31,2, transmission shaft radially transmission shaft 28 with No. 3 radially transmission shaft by toothed belt transmission mode, be connected.Exactly, No. 1 of No. 1 radial plunger pump 34 radially the input end of transmission shaft 31 by identical expansion connecting sleeve 15 fixed installations of structure, radially export synchronous pulley 30 No. 1, No. 2 of No. 2 radial plunger pumps 35 radially the input end of transmission shaft 28 by 2 identical expansion connecting sleeves 15 fixed installations of structure, radially input synchronous pulley 29 for No. 2 and radially export synchronous pulley No. 2, No. 3 of No. 3 radial plunger pumps 40 radially the input end of transmission shaft by 2 identical expansion connecting sleeves 15 fixed installations of structure, radially input synchronous pulley No. 3, during if any No. 4 radial plunger pumps, to install and radially export synchronous pulley (being positioned at the left side of radially inputting synchronous pulley for No. 3) for No. 3.No. 1 of No. 1 radial plunger pump 34 radially on transmission shaft 31 radially export for No. 1 synchronous pulley 30 and No. 2 radial plunger pumps 35 No. 2 radially radially inputting for No. 2 between synchronous pulley 29 on transmission shaft 28 adopt radially Timing Belt 36 to be connected, No. 2 of No. 2 radial plunger pumps 35 radially on transmission shaft 28 radially input for No. 2 synchronous pulley 29 and No. 3 radial plunger pumps 40 No. 3 radially radially inputting for No. 3 on transmission shaft between synchronous pulley, adopt 2 to No. 3 radially Timing Belt be connected.An Idle wheel 14 that structure is identical is installed in one outside of each Timing Belt.No. 1 of No. 1 radial plunger pump 34 radially the input end of transmission shaft 31 by coupling, be connected with servomotor 18, servomotor 18 rotates, drive No. 1 radially No. 31,2, transmission shaft radially transmission shaft 28 with No. 3 radially transmission shaft synchronize, equidirectional rotation.No. 1 radial plunger pump 34, No. 1 rotor 26 of No. 2 radial plunger pumps 35 and No. 3 radial plunger pumps 40, No. 2 rotors 22 with on No. 3 rotors, be circumferentially all evenly equipped with 5 No. 1 radial plungers 25 that structure is identical, No. 2 radial plungers 21 and No. 3 radial plungers, No. 2 radial plungers 21 No. 1 radial plunger 25 identical with respect to 5 structures on No. 1 rotor 26 in No. 1 radial plunger pump 34 that wherein 5 structures on No. 2 rotors 22 in No. 2 radial plunger pumps 35 are identical is 1 misphase parallactic angle β, identical No. 3 radial plungers No. 2 radial plungers 21 identical with respect to 5 structures on No. 2 rotors 22 in No. 2 radial plunger pumps 35 of No. 3 epitrochanterian 5 structures in No. 3 radial plunger pumps 40 are 1 misphase parallactic angle β.No. 1 of No. 1 radial plunger pump 34 radially the input end of transmission shaft 31 by coupling, connect servomotor 18, certainly, also can No. 2 radial plunger pumps 35 or No. 3 radial plunger pumps 40 No. 2 radially transmission shaft 28 or No. 3 radially the input end of transmission shaft by coupling, connect servomotor 18.34, No. 2 radial plunger pumps 35 of No. 1 radial plunger pump adopt pipeline link together and be connected and realize oil suction with fuel tank with the radially filler opening m in No. 3 radial plunger pumps 40, and the radially force feed mouth n in 34, No. 2 radial plunger pumps 35 of No. 1 radial plunger pump and No. 3 radial plunger pumps 40 adopts pipeline link together and be connected to its fuel feeding with hydraulic system.

The basic parameter of the servomotor 18 in embodiment is rated power 5kW, rated speed 2000rpm, nominal torque 23Nm.The rated flow 7.5L/min that forms the single radial plunger pump of staggered phase parallel combined plunger-type hydraulic pump, rated working pressure 58MPa.No. 1 radial plunger of No. 1 radial plunger pump 34 is counted to Z=5 substitution formula (1) and calculate the radial plunger misphase parallactic angle β=2 π/15=24 ° in staggered phase parallel combined plunger-type hydraulic pump.By after 34, No. 2 radial plunger pumps 35 of No. 1 radial plunger pump and No. 3 radial plunger pump 40 connections, set up the hydraulic system shown in Fig. 3, according to said method, differentiate the circumferential phase place of radial plunger, and by the circumferential relative position of adjacent two radial plunger pumps of expansion connecting sleeve 15 change, making the misphase parallactic angle β between No. 2 radial plunger pumps 35 and No. 1 radial plunger pump 34 is 24 °, and the misphase parallactic angle β between No. 3 radial plunger pumps 40 and No. 2 radial plunger pumps 35 is 24 °.

Consult Fig. 8, during single radial plunger oil pump feed, the flow of this radial plunger pump is with T ₁=π/5 are cycle variation, and its flow pulsation is Q ₁=4.89%Q _max; 34, No. 2 radial plunger pumps 35 of No. 1 radial plunger pump are 34, No. 2 radial plunger pumps 35 of No. 1 radial plunger pump and No. 3 radial plunger pump 40 flow sums with No. 3 radial plunger pump 40 misphase in parallel position fuel feeding, output flow, and the flow pulsation cycle is reduced to 1/3, is T ₂=π/15, flow pulsation is about Q ₂=0.535%Q ' _max, can show that 34, No. 2 radial plunger pumps 35 of No. 1 radial plunger pump are about 1/3 of single radial plunger pump with the flow pulsation of No. 3 radial plunger pump 40 gained in parallel ², 1/9.As shown in FIG..

Adopting axial piston pump that M specification, model, performance parameter are identical to form described staggered phase parallel combined plunger-type hydraulic pump is misphase position parallel combination axial plunger type hydraulic pump:

Consult Figure 11 and Figure 12, adopting axial piston pump that M specification, model, performance parameter are identical to form described staggered phase parallel combined plunger-type hydraulic pump is misphase position parallel combination axial plunger type hydraulic pump, wherein: M gets the natural number that is more than or equal to 4.At this moment the input end of No. 3 axial drive shaft in No. 3 axial piston pumps 37 is installed in addition with output synchronous pulley No. 3 by expansion connecting sleeve 15, the input end of No. 4 transmission shafts of No. 4 axial piston pumps is by 2 No. 4 input synchronous pulleys of expansion connecting sleeve 15 fixed installation and No. 4 output synchronous pulleys that structure is identical, the input end of No. 5 transmission shafts of No. 5 axial piston pumps is by 2 No. 5 input synchronous pulleys of expansion connecting sleeve 15 fixed installation and No. 5 output synchronous pulleys that structure is identical, the rest may be inferred ..., No. M-1 output synchronous pulley of input end fixed installation of the M-1 transmission shaft of M-1 axial piston pump 38 and No. M-1 output synchronous pulley, No. M input synchronous pulley of input end fixed installation of the M transmission shaft of M axial piston pump 39 is (when M is even number, No. M input synchronous pulley be positioned at M transmission shaft input end in (left side) side, when M is odd number, No. M input synchronous pulley is positioned at outer (right side) side of M transmission shaft input end).On No. 3 transmission shafts in No. 3 axial piston pumps 37 No. 3 output synchronous pulleys adopt 3 to No. 4 Timing Belts to be connected with inputting between synchronous pulleys for No. 4 on No. 4 transmission shafts in No. 4 axial piston pumps, inputting between synchronous pulleys for No. 5 on No. 5 transmission shafts of on No. 4 transmission shafts of No. 4 axial piston pumps No. 4 output synchronous pulleys and No. 5 axial piston pumps adopts 4 to No. 5 Timing Belts to be connected, the rest may be inferred ..., on M-1 transmission shaft in M-1 axial piston pump No. M-1 output synchronous pulley adopts M-1 to M Timing Belt to be connected with inputting between synchronous pulley for No. M on M transmission shaft in M axial piston pump.M axial piston pump is arranged on parallel combination pump mounting plate 32 in vertical position by bolt and locating stud, the rotational axis of the transmission shaft in M axial piston pump is parallel to each other and locates in same level, the input end of the transmission shaft in M axial piston pump is positioned at right side, and the identical Idle wheel 14 of an outside structure of installation that M-1 to M Timing Belt is synchronously taken in an outside of each Timing Belt for 3 to No. 4 to is contact connection.Axial fuel inlet mouth a in M axial piston pump adopts pipeline link together and be connected and realize oil suction with fuel tank, and the axial force feed mouth b in M axial piston pump adopts pipeline link together and be connected to its fuel feeding with hydraulic system.The input end of No. 1 transmission shaft 10 of No. 1 axial piston pump 19 or the M transmission shaft of M axial piston pump 39 connects servomotor 18 by coupling, and servomotor 18 rotates, and drives synchronous, the equidirectional rotation of No. 1 transmission shaft 10 to M transmission shaft.Certainly, the input end that can be also No. 2 any one the axial plunger pump drive shaft in the middle of axial piston pump 33 to M-1 axial piston pumps 38 connects servomotor 18 by coupling, at this moment No. 1 axial piston pump 19 in two ends and No. 1 transmission shaft 10 of M axial piston pump 39 and the input end of M transmission shaft are fixed No. 1 input synchronous pulley by 2 identical expansion connecting sleeves 15 of structure and are inputted synchronous pulley with No. M, the input end of other axial plunger pump drive shaft is all by 21 input synchronous pulley of expansion connecting sleeve 15 fixed installation and 1 output synchronous pulleys that structure is identical.

By No. 4 axial piston pump to the axial plungers on a rear axial piston pump pump housing of central adjacent two axial piston pumps of M axial piston pump 39, with respect to the axial plunger on the previous axial piston pump pump housing, be 1 misphase parallactic angle β.

Be arranged on 1, No. 2 output synchronous pulleys of 9, No. 2 input synchronous pulleys of No. 1 output synchronous pulley on the axial piston pump that M specification, model, performance parameter are identical, No. 3 input synchronous pulleys, No. 3 output synchronous pulleys, No. 4 input synchronous pulleys, No. 4 output synchronous pulleys, No. 5 input synchronous pulleys, No. 5 output synchronous pulleys ... identical with No. M input synchronous pulley (amounting to 2M-2 individual) structure with No. M-1 output synchronous pulley, No. M-1 output synchronous pulley; 7,2 to No. 3 Timing Belts of Timing Belt, 3 to No. 4 Timing Belts ... identical with M-1 to M Timing Belt (amounting to M-1 bar) structure; The Idle wheel 14 that install in one outside of each Timing Belt (being M-1) structure is identical; Expansion connecting sleeve 15 (for the 2M-2) structure identical (all bulging joining sleeve 15 application Z 3 series) that each synchronous pulley is installed.

Adopting radial plunger pump that M specification, model, performance parameter are identical to form described staggered phase parallel combined plunger-type hydraulic pump is misphase position parallel combination radial plunger type oil hydraulic pump:

Consult Figure 13 and Figure 14, adopting radial plunger pump that M specification, model, performance parameter are identical to form described staggered phase parallel combined plunger-type hydraulic pump is misphase position parallel combination radial plunger type oil hydraulic pump, wherein: M gets the natural number that is more than or equal to 4.At this moment No. 3 in No. 3 radial plunger pumps 40 radially input end of transmission shaft are installed in addition with No. 3 by expansion connecting sleeve 15 and radially export synchronous pulley, No. 4 of No. 4 radial plunger pumps radially the input end of transmission shaft by 2 identical expansion connecting sleeves 15 fixed installations of structure, radially input synchronous pulley for No. 4 and radially export synchronous pulley No. 4, No. 5 of No. 5 radial plunger pumps radially the input end of transmission shaft by 2 identical expansion connecting sleeves 15 fixed installations of structure, radially input synchronous pulley for No. 5 and radially export synchronous pulley No. 5, the rest may be inferred ..., No. M-1 of M-1 radial plunger pump 42 radially the input end fixed installation of transmission shaft radially input synchronous pulley for No. M-1 and radially export synchronous pulley No. M-1, No. M of M radial plunger pump 43 radially the input end fixed installation of transmission shaft radially input synchronous pulley for No. M (when M is even number, radially input for No. M synchronous pulley be positioned at No. M radially transmission shaft input end in (left side) side, when M is odd number, radially input synchronous pulley for No. M and be positioned at radially outer (right side) side of transmission shaft input end No. M).In No. 3 radial plunger pumps 40 No. 3 radially on transmission shaft radially export for No. 3 synchronous pulley with in No. 4 radial plunger pumps No. 4 radially radially inputting for No. 4 on transmission shaft between synchronous pulley, adopt 3 to No. 4 radially Timing Belt be connected, No. 4 of No. 4 radial plunger pumps radially on transmission shaft radially export for No. 4 synchronous pulley and No. 5 radial plunger pumps No. 5 radially radially inputting for No. 5 on transmission shaft between synchronous pulley, adopt 4 to No. 5 radially Timing Belt be connected, the rest may be inferred ..., in M-1 radial plunger pump 42 No. M-1 radially on transmission shaft radially export for No. M-1 synchronous pulley with in M radial plunger pump 43 No. M radially radially inputting for No. M on transmission shaft between synchronous pulley, adopt M-1 to M number radially Timing Belt be connected.M radial plunger pump is arranged on parallel combination radial pump mounting plate 41 in vertical position, the rotational axis of the transmission shaft in M radial plunger pump is parallel to each other, the input end of the transmission shaft in M radial plunger pump is positioned at right side, an outside of each Timing Belt is synchronously taken an outside of M-1 to M Timing Belt for 3 to No. 4 to an Idle wheel 14 that structure is identical is installed.Radially filler opening m in M radial plunger pump adopts pipeline link together and be connected and realize oil suction with fuel tank, and the radially force feed mouth n in M radial plunger pump adopts pipeline link together and be connected to its fuel feeding with hydraulic system.No. 1 of No. 1 radial plunger pump 34 radially transmission shaft 31 or M radial plunger pump 43 No. M radially the input end of transmission shaft by coupling, connect servomotor 18, servomotor 18 rotates, and drives No. 1 radially 31 to No. M radially synchronous, equidirectional rotation of transmission shaft 43 of transmission shaft.Certainly, the input end that can be also No. 2 any one the radial plunger pump drive shaft in the middle of radial plunger pump 35 to M-1 radial plunger pumps 42 connects servomotor 18 by coupling, at this moment No. 1 of No. 1 radial plunger pump 34 in two ends and M radial plunger pump 43 radially transmission shaft 31 with No. M radially the input end of transmission shaft by the identical expansion connecting sleeve 15 of 2 structures, fix and radially input synchronous pulley 30 for No. 1 and radially input synchronous pulley No. M, other the radial plunger pump i.e. input end of the radially transmission shaft of any one radial plunger pump in the middle of No. 2 radial plunger pump 35 to M-1 radial plunger pumps 42 is all radially inputted synchronous pulley and 1 by 2 identical expansion connecting sleeves 15 1 of fixed installations of structure and is radially exported synchronous pulley.Adjacent two radial plunger pumps in the middle of from No. 4 radial plunger pumps to M radial plunger pump 43, an epitrochanterian radial plunger of radial plunger pump is 1 misphase parallactic angle β with respect to the epitrochanterian radial plunger of previous radial plunger pump.

Be arranged on M specification, model, on the identical radial plunger pump of performance parameter, radially export synchronous pulley 30 No. 1, radially input synchronous pulley 29 No. 2, radially export synchronous pulley No. 2, radially input synchronous pulley No. 3, radially export synchronous pulley No. 3, radially input synchronous pulley No. 4, radially export synchronous pulley No. 4, radially input synchronous pulley No. 5, radially export synchronous pulley No. 5, ... with radially input synchronous pulley No. M-1, radially export synchronous pulley for No. M-1 and radially to input synchronous pulley (amounting to 2M-2) structure for No. M identical, radially No. 36,2 to 3, Timing Belt radially Timing Belt, 3 to No. 4 radially Timing Belt ... radially Timing Belt (amounting to M-1 bar) structure is identical with M-1 to M number, each Idle wheel 14 that radially install in an outside of Timing Belt and each Timing Belt (being respectively M-1) structure is identical, each radially synchronous pulley identical with expansion connecting sleeve 15 (the being respectively 2M-2) structure that each synchronous pulley is installed (all bulging joining sleeve 15 application Z 3 series) is installed.

Below 5 axles (footpath) to the applicable cases of plunger pump parallel connection:

The basic parameter of the servomotor 18 in embodiment is rated power 5kW, rated speed 2000rpm, nominal torque 23Nm.Form the single axle (footpath) of staggered phase parallel combined plunger-type hydraulic pump to the rated flow 12.5L/min of plunger pump, rated working pressure 58MPa.No. 1 axle (footpath) is counted to Z=5 substitution formula (1) to the plunger of plunger pump and calculate axle (footpath) in staggered phase parallel combined plunger-type hydraulic pump to plunger misphase parallactic angle β=2 pi/2 5=14.4 °.By No. 1 axle (footpath) to plunger pump, No. 2 axles (footpath) to plunger pump and No. 3 axles (footpath) after plunger pump connection, set up the hydraulic system shown in Fig. 3, according to said method, differentiate axle (footpath) to the circumferential phase place of plunger, and change adjacent two axles (footpath) to the circumferential relative position of plunger pump by expansion connecting sleeve 15, making the misphase parallactic angle β between No. 2 radial plunger pumps and No. 1 radial plunger pump is 14.4 °, No. 3 axles (footpath) are 14.4 ° to plunger pump and No. 2 axles (footpath) to the misphase parallactic angle β between plunger pump, No. 4 axles (footpath) are 14.4 ° to plunger pump and No. 3 axles (footpath) to the misphase parallactic angle β between plunger pump, No. 5 axles (footpath) are 14.4 ° to plunger pump and No. 4 axles (footpath) to the misphase parallactic angle β between plunger pump.

Consult Figure 15, during single radial plunger oil pump feed, the flow of this radial plunger pump is with T ₁=π/5 are cycle variation, and its flow pulsation is Q ₁=4.89%Q _max; No. 1 axle (footpath) to plunger pump, No. 2 axles (footpath) to plunger pump with No. 3 axles (footpath) to plunger pump misphase in parallel position fuel feeding, output flow is No. 1 axle (footpath) to plunger pump, No. 2 axles (footpath) to plunger pump, No. 3 axles (footpath) to plunger pump flow, No. 4 axles (footpath) to plunger pump 5 with number axle (footpath) to plunger pump sum, the flow pulsation cycle is reduced to 1/5, is T ₂=pi/2 5, flow pulsation is about Q ₂=0.187%Q ' _max, can draw No. 1 axle (footpath) to plunger pump, No. 2 axles (footpath) to plunger pump, No. 3 axles (footpath) are about single axle (footpath) to 1/5 of plunger pump with No. 5 axles (footpath) to the flow pulsation of plunger pump gained in parallel to plunger pump, No. 4 axles (footpath) to plunger pump ², 1/25.As shown in FIG..

Claims (4)

1. a staggered phase parallel combined plunger-type hydraulic pump, it is characterized in that, described staggered phase parallel combined plunger-type hydraulic pump comprises No. 1 axial piston pump (19), No. 2 axial piston pumps (33), No. 3 axial piston pumps (37), M-1 axial piston pump (38), M axial piston pump (39), No. 1 output synchronous pulley (9), No. 2 input synchronous pulleys (1), No. 2 output synchronous pulleys, No. 3 input synchronous pulleys, No. 3 output synchronous pulleys, No. 4 input synchronous pulleys, No. 4 output synchronous pulleys, No. 5 input synchronous pulleys, No. M-1 input synchronous pulley, No. M-1 output synchronous pulley, No. M input synchronous pulley, 1 to No. 2 Timing Belt (7), 2 to No. 3 Timing Belts, 3 to No. 4 Timing Belts, M-1 to M Timing Belt, M-1 the Idle wheel (14) that structure is identical, 2M-2 the expansion connecting sleeve (15) and servomotor (18) that structure is identical, wherein M is more than or equal to 2 natural number,

No. 1 axial piston pump (19), No. 2 axial piston pumps (33), No. 3 axial piston pumps (37), M-1 axial piston pump (38) is arranged on parallel combination pump mounting plate (32) in vertical position by bolt with M axial piston pump (39), No. 1 axial piston pump (19), No. 2 axial piston pumps (33), No. 3 axial piston pumps (37), M-1 axial piston pump (38) is parallel to each other and locates in same level with the rotational axis of M axial piston pump (39), No. 1 axial piston pump (19), No. 2 axial piston pumps (33), No. 3 axial piston pumps (37), No. 1 transmission shaft (10) in M-1 axial piston pump (38) and M axial piston pump (39), No. 2 transmission shafts (4), No. 3 transmission shafts, the input end of M-1 transmission shaft and M transmission shaft is positioned at right side, No. 1 output synchronous pulley (9) is fixedly mounted on the input end of No. 1 transmission shaft (10) by the identical expansion connecting sleeve of structure (15), No. 2 input synchronous pulleys (1) with export synchronous pulley for No. 2 and be fixedly mounted on the input end of No. 2 transmission shafts (4) by the identical expansion connecting sleeve (15) of 2 structures, No. 3 input synchronous pulleys with export synchronous pulley for No. 3 and be fixedly mounted on the input end of No. 3 transmission shafts by the identical expansion connecting sleeve (15) of 2 structures, No. 4 input synchronous pulleys with export synchronous pulley for No. 4 and be fixedly mounted on the input end of No. 4 transmission shafts by the identical expansion connecting sleeve (15) of 2 structures, No. M-1 input synchronous pulley with export synchronous pulley for No. M-1 and be fixedly mounted on the input end of M-1 transmission shaft by the identical expansion connecting sleeve (15) of 2 structures, No. M input synchronous pulley is fixedly mounted on the input end of M transmission shaft by the identical expansion connecting sleeve of structure (15), No. 1 output synchronous pulley (9) is connected by 1 to No. 2 Timing Belt (7) with No. 2 input synchronous pulleys (1), No. 2 output synchronous pulley is connected by 2 to No. 3 Timing Belts with No. 3 input synchronous pulleys, No. 3 output synchronous pulley is connected by 3 to No. 4 Timing Belts with No. 4 input synchronous pulleys, No. 4 output synchronous pulley is connected by 4 to No. 5 Timing Belts with No. 5 input synchronous pulleys, No. M-1 output synchronous pulley is connected by M-1 to M Timing Belt with No. M input synchronous pulley, 1 to No. 2 Timing Belt (7), 2 to No. 3 Timing Belts, 3 to No. 4 Timing Belts, with an outside of M-1 to M Timing Belt, Idle wheel (14) that structure is identical being respectively installed connects for contact, No. 1 axial piston pump (19), No. 2 axial piston pumps (33), No. 3 axial piston pumps (37), M-1 axial piston pump (38) adopts pipeline be connected and be connected with fuel tank with the axial fuel inlet mouth (a) in M axial piston pump (39), No. 1 axial piston pump (19), No. 2 axial piston pumps (33), No. 3 axial piston pumps (37), M-1 axial piston pump (38) adopts pipeline be connected and be connected with hydraulic system with the axial force feed mouth (b) in M axial piston pump (39), the input end of No. 1 transmission shaft (10) of No. 1 axial piston pump (19) or the M transmission shaft of M axial piston pump (39) connects servomotor (18) by coupling, axial plunger on the pump housing of a rear axial piston pump of adjacent two axial piston pumps from No. 1 axial piston pump (19) to M axial piston pump (39) is 1 misphase parallactic angle β with respect to the axial plunger on the pump housing of previous axial piston pump,

the unit of misphase parallactic angle β in formula is radian, the plunger number that Z is single pump,

If by angle calculation, above formula is expressed as

2. according to staggered phase parallel combined plunger-type hydraulic pump claimed in claim 1, it is characterized in that, described No. 1 axial piston pump (19), No. 2 axial piston pumps (33), No. 3 axial piston pumps (37) ..., M-1 axial piston pump (38) is identical with M axial piston pump (39) structure; No. 1 output synchronous pulley (9), No. 2 input synchronous pulley (1), No. 2 output synchronous pulley, No. 3 input synchronous pulley, No. 3 output synchronous pulley, No. 4 input synchronous pulley, No. 4 output synchronous pulley, No. 5 input synchronous pulley ..., No. M-1 output synchronous pulley be with to input synchronous belt wheel structure No. M identical, 1 to No. 2 Timing Belt (7), 2 to No. 3 Timing Belts, 3 to No. 4 Timing Belts ... identical with M-1 to M Timing Belt structure.

3. a staggered phase parallel combined plunger-type hydraulic pump, is characterized in that, described staggered phase parallel combined plunger-type hydraulic pump comprises No. 1 radial plunger pump (34), No. 2 radial plunger pumps (35), No. 3 radial plunger pumps (40), M-1 radial plunger pump (42), M radial plunger pump (43), radially export synchronous pulley (30) for No. 1, radially input synchronous pulley (29) for No. 2, radially export synchronous pulley No. 2, radially input synchronous pulley No. 3, radially export synchronous pulley No. 3, radially input synchronous pulley No. 4, radially export synchronous pulley No. 4, radially input synchronous pulley No. 5, radially input synchronous pulley No. M-1, radially export synchronous pulley No. M-1, radially input synchronous pulley No. M, 1 to No. 2 Timing Belt (36) radially, 2 to No. 3 Timing Belts radially, 3 to No. 4 Timing Belts radially, M-1 to M number Timing Belt radially, M-1 the Idle wheel (14) that structure is identical, 2M-2 the expansion connecting sleeve (15) and servomotor (18) that structure is identical, wherein M is more than or equal to 2 natural number,

No. 1 radial plunger pump (34), No. 2 radial plunger pumps (35), No. 3 radial plunger pumps (40), M-1 radial plunger pump (42) is arranged on parallel combination radial pump mounting plate (41) in vertical position by bolt with M radial plunger pump (43), No. 1 radial plunger pump (34), No. 2 radial plunger pumps (35), No. 3 radial plunger pumps (40), M-1 radial plunger pump (42) is parallel to each other and locates in same level with the rotational axis of M radial plunger pump (43), No. 1 radial plunger pump (34), No. 2 radial plunger pumps (35), No. 3 radial plunger pumps (40), in M-1 radial plunger pump (42) and M radial plunger pump (43) No. 1 transmission shaft (31) radially, No. 2 transmission shafts (28) radially, No. 3 transmission shafts radially, No. M-1 radially transmission shaft and No. M radially the input end of transmission shaft be positioned at right side, radially export synchronous pulley (30) for No. 1 and be fixedly mounted on No. 1 radially on the input end of transmission shaft (31) by the identical expansion connecting sleeve of structure (15), radially input synchronous pulley (29) for No. 2 and radially export synchronous pulley for No. 2 and be fixedly mounted on No. 2 radially on the input end of transmission shaft (28) by the identical expansion connecting sleeve (15) of 2 structures, radially input synchronous pulley for No. 3 and radially export synchronous pulley for No. 3 and be fixedly mounted on No. 3 radially on the input end of transmission shaft by the identical expansion connecting sleeve (15) of 2 structures, radially input synchronous pulley for No. 4 and radially export synchronous pulley for No. 4 and be fixedly mounted on No. 4 radially on the input end of transmission shaft by the identical expansion connecting sleeve (15) of 2 structures, radially input synchronous pulley for No. M-1 and radially export synchronous pulley for No. M-1 and be fixedly mounted on No. M-1 radially on the input end of transmission shaft by the identical expansion connecting sleeve (15) of 2 structures, radially input synchronous pulley for No. M and be fixedly mounted on No. M radially on the input end of transmission shaft by the identical expansion connecting sleeve of structure (15), radially export for No. 1 synchronous pulley (30) with radially input for No. 2 synchronous pulley (29) by 1 to No. 2 radially Timing Belt (36) be connected, radially export for No. 2 synchronous pulley with radially input for No. 3 synchronous pulley by 2 to No. 3 radially Timing Belt be connected, radially export for No. 3 synchronous pulley with radially input for No. 4 synchronous pulley by 3 to No. 4 radially Timing Belt be connected, radially export for No. 4 synchronous pulley with radially input for No. 5 synchronous pulley by 4 to No. 5 radially Timing Belt be connected, radially export for No. M-1 synchronous pulley with radially input for No. M synchronous pulley by M-1 to M number radially Timing Belt be connected, 1 to No. 2 Timing Belt (36) radially, 2 to No. 3 Timing Belts radially, 3 to No. 4 Timing Belts radially, with M-1 to M number radially an outside of Timing Belt Idle wheel (14) that structure is identical be respectively installed connected for contact, No. 1 radial plunger pump (34), No. 2 radial plunger pumps (35), No. 3 radial plunger pumps (40), M-1 radial plunger pump (42) adopts pipeline be connected and be connected with fuel tank with the radially filler opening (m) in M radial plunger pump (43), No. 1 radial plunger pump (34), No. 2 radial plunger pumps (35), No. 3 radial plunger pumps (40), M-1 radial plunger pump (42) adopts pipeline be connected and be connected with hydraulic system with the radially force feed mouth (n) in M radial plunger pump (43), No. 1 of No. 1 radial plunger pump (34) radially transmission shaft (31) or M radial plunger pump (43) No. M radially the input end of transmission shaft by coupling, connect servomotor (18), from No. 1 radially transmission shaft (31) to the radial plunger on the pump housing of a rear radial plunger pump of adjacent two radial plunger pumps M radial plunger pump (43) with respect to the radial plunger on the pump housing of previous radial plunger pump, be 1 misphase parallactic angle β,

the unit of misphase parallactic angle β in formula is radian, the plunger number that Z is single pump,

If by angle calculation, above formula is expressed as

4. according to staggered phase parallel combined plunger-type hydraulic pump claimed in claim 3, it is characterized in that, described No. 1 radial plunger pump (34), No. 2 radial plunger pumps (35), No. 3 radial plunger pumps (40) ..., M-1 radial plunger pump (42) is identical with M radial plunger pump (43) structure; Radially export synchronous pulley (30) for No. 1, radially input synchronous pulley (29) for No. 2, radially export synchronous pulley for No. 2, radially input synchronous pulley for No. 3, radially export synchronous pulley for No. 3, radially input synchronous pulley for No. 4, radially export synchronous pulley for No. 4, radially input synchronous pulley for No. 5 ..., radially input synchronous pulley No. M-1, radially export synchronous pulley for No. M-1 and radially to input synchronous belt wheel structure No. M identical; 1 to No. 2 radially Timing Belt (36), 2 to No. 3 radially Timing Belt, 3 to No. 4 radially Timing Belt ... radially Timing Belt structure is identical with M-1 to M number.

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