CN109441751A - A kind of fully water lubricating axial multiple plunger water pump based on new engineering material - Google Patents

Abstract

The invention discloses a kind of fully water lubricating axial multiple plunger water pump based on new engineering material, including cylinder body and pump case, cylinder body left end are connected with left end cap, and pump case right end is equipped with right end cap；Pump case is equipped with inner cavity, and is equipped with main shaft, and main shaft both ends are equipped with the left and right bearing of main shaft, and middle part is equipped with thrust swash plate, and thrust swash plate two sides are equipped with left and right thrust bearing；Cylinder body right end face is equipped with cylinder holes, and plunger is equipped in cylinder holes, and cylinder body right center is equipped with retracting spring, and left thrust bearing side is equipped with piston shoes, and piston shoes are pressed on the toroidal race of left thrust bearing by retracting spring by flexural pivot, return plate；Plunger base is equipped with flow distributing chamber, discharge van and the inlet valve being connected to plunger；Cylinder body left side center is equipped with drainage cavity, and drainage cavity is connected to discharge outlet.It is the configuration of the present invention is simple, compact；It is light-weight, small in size；Reliable operation；Contamination resistance is strong；Flow and pressure fluctuation are small；Intake performance is good.

Description

A kind of fully water lubricating axial multiple plunger water pump based on new engineering material

Technical field

The present invention relates to water pump more particularly to a kind of fully water lubricating axial multiple plunger water pumps based on new engineering material.

Background technique

From the point of view of the development prospect of hydraulic technique, directly using natural sea-water or fresh water proxy mineral oil as hydraulic system work The water hydrostatic transmission for making medium has pollution-free and environment compared with traditional hydraulic technology for making working media with mineral oil And product is compatible；It is non-ignitable, without fire hazard；Without mineral oil, energy saving；System is simple；Outstanding advantages of reliable operation.It is Generally acknowledged ideal " green " technology, safe practice and power-saving technology in the world have very wide application prospect, are current One highly important developing direction of internationally recognized hydraulic technique.Water Hydraulic Pump is the key that power member in water hydraulic system Part is the heart in water hydraulic system.The superiority and inferiority of its performance has conclusive shadow to the performance of entire water hydraulic system and development It rings.

From the point of view of the needs of Vehicles Collected from Market, high performance volumetric water pump is the urgent need of many novel branchs of industry.Such as； Indispensable steam trap connection, desalination plant and fine spray extinguisher on sea water desalination, fine water mist fire-extinguishing system and naval vessel Deng, be all China be badly in need of development sunshine industry.The key that these engineering departments shape up, depends primarily on pump performance Superiority and inferiority.Regrettably, the matching used water pump of institute, these branchs of industry at present, have the shortcomings that it is different degrees of, so as to cause It runs and maintenance cost is high；Vibration noise is big；Functional reliability is low, in some instances it may even be possible to there are potential danger (such as occur fire When, water mist is pumped because failing to start) the problems such as.New type of valve fluid-distributing axial multiple plunger volumetric water provided by the present invention Pump, has the advantages that uniqueness, can meet the urgent need of above-mentioned novel branch of industry well.

Up to the present, the widely applied mesohigh on sea water desalination, fine water mist fire-extinguishing system and naval vessel both at home and abroad Water pump mainly has following four seed type:

The first is the domestic and international three-plunger reciprocating Pumpp structure driven by crank link mechanism widely applied already.It contains crank Link mechanism, deceleration mechanism and individual oil lubrication mechanism.This pump work is reliable, but its volume is big, weight weight, revolving speed Low, flow pulsation is big, vibration and noise are big.Since instability of flow usually will also configure pressure stabilizing and set when being used for sea water desalination It is standby.

Second is water-oil separating, Flat valve, axial multiple plunger formula structure.This kind of pump is immersed in except flat valve and plunger hole Water China and foreign countries, other main friction pairs (such as piston shoes-swash plate, each class bearing, plunger ball-piston shoes ball-and-socket) are submerged in lubricating oil In chamber.Such pump, due to lacking high performance water lubrication antithesis friction pair material, was haveed no alternative but in the water hydrostatic transmission early stage of development And a kind of structural shape used.The Central China University of Science and Technology's patent being applied successfully extensively on many naval equipments in China already produces Product " a kind of novel axial multiple plunger volumetric water pump " (application number: 97109327.X) just belong to this structural shape.Practice It proves, compared with crankshaft reciprocating pump, this pump has that small volume, lighter in weight, uniform flow, pressure fluctuation be small, noise Low, outstanding advantages of intake performance is good.It is close in the secondary necessary device of plunger-cylinder holes friction of this pump to prevent oil, water from ganging up Seal, to keep the oil in the water and lubricant reservoir in plunger cavity completely separated.But once the sealing ring fails, grease string Logical, some friction pairs in lubricant reservoir may be quickly invalidated, this is a deadly defect of such pump.

The third is centrifugal multistage pump multiple centrifugal pump.This pump configuration is simple, reliable operation.But its output flow is with the increasing of load pressure Add and drastically reduce, since its operating point changes, keeps its working efficiency very low, or even up to 50% or less.Such as it is used for sea water desalination Device greatly improves its operating cost.

4th kind is fully water lubricating, valve plate distribution, axial multiple plunger formula structure.Most typically Denmark Danfoss company The PAHF type and APP type axial piston pump of production.The small in size, light-weight of this pump, uniform flow, specific power are big.It is according to Replacing between the kidney slot and high-speed rotating cylinder body end face plunger hole in flow side surface changes and flow.Cylinder body end face It is the key that a pair of of receiving high speed, heavy duty, unbalance loading and pulsating load friction are secondary between valve plate, under the conditions of water lubrication, very Be easy to fail due to eccentric wear or excessive wear, especially when there is particulate pollutant in water, by the abrasion of sharply acceleration pump and Failure.Using when such pump, there are following two serious problems:

(1) suction capacity of this kind of pump is poor.Therefore, it is (1 that Danfoss, which is distinctly claimed the inlet pressure that PAHF type must be kept to pump, ~6 bars), the inlet pressure of APP type pump is (2~10 bars).This requires the entrances in pump in addition to install a small pump additional.

(2) contamination resistance of this kind of pump is very poor.Therefore, Danfoss be distinctly claimed be pumped into the absolute cleanliness degree of saliva must 10 μm or less must be maintained at, that is to say, that ensure to there is solid particle of the size greater than 10 μm to deposit in pumped water ?.This, which just must install the high accuracy depth type filter being made of porous materials in the entrance of pump, (can not use surface type mistake Strainer), by obstruction and suction-operated, water pollutant is blocked in filter element.But the contaminant holding capacity of filter element It is limited, if water pollutant blocks the gap in filter core, pressure difference increases, cannot filtration again, it is necessary to Filter core (because depth type filter core is used again after back flush can not be leaned on clean) is replaced immediately.So this pump such as goes out for water mist The open systems such as fire, sea water desalination just must install the ultra-filtration system of a large capacity on suction line, while when wanting Monitoring filter differential pressure is carved, in time the expensive filter element of replacement.This will be such that operating cost greatly improves.In fact, will be Remained in open system the cleannes of water reach 10 μm or less be it is very difficult, as a result due in water pollution be easy to Abrasion is caused to aggravate, the lost of life of pump, functional reliability reduces.Especially pumped for fire-fighting system, if it happens when this When fire, excessive wear or it is stuck etc. due to and cause pump normally cannot start and operate, it is possible to after causing calamity Fruit.

Summary of the invention

The present invention is to provide a kind of fully water lubricating axial direction multicolumn based on new engineering material to solve above-mentioned deficiency Fill in water pump.

Above-mentioned purpose of the invention is realized by technical solution below: a kind of Quan Shuirun based on new engineering material Sliding axial multiple plunger water pump, it is characterised in that: including cylinder body and pump case, the cylinder body left end is connected with left end cap, left end cap Right side is equipped with left end cap O-ring, and left end cap is equipped with discharge outlet and water sucking mouth, and the cylinder body right end passes through pump case attachment screw It is connect with pump case, pump case right end is equipped with right end cap by right end cap attachment screw, is equipped with rubber and plastic on the inside of right end cap and combines Rotate water seal；

The pump case is equipped with the inner cavity being connected to water sucking mouth, is equipped with main shaft in the inner cavity, main shaft both ends are equipped with main shaft Left bearing and main shaft right bearing, main shaft left bearing and main shaft right bearing are respectively supported at cylinder center and right end cap center, and main Axis right end passes through right end cap and rubber and plastic combination rotation water seal；

Thrust swash plate is equipped in the middle part of the main shaft, thrust swash plate two sides are separately installed with left thrust bearing and right thrust bearing；

It is evenly equipped with the odd number cylinder holes parallel with cylinder body axis on the same circumference of cylinder body right end face, column is installed in cylinder holes Plug, the cylinder body right center are equipped with retracting spring, and the left thrust bearing side is equipped with piston shoes, and the retracting spring passes through Piston shoes are pressed on the toroidal race of left thrust bearing by flexural pivot, return plate；The plunger is equipped with the plunger ball cooperated with piston shoes Head；

The plunger base is equipped with the flow distributing chamber being connected to plunger, and discharge van, installation above flow distributing chamber are equipped with below flow distributing chamber There is inlet valve, and is fixed by locking nut；Discharge van and inlet valve, which are respectively equipped with, extrudes valve chamber and sucking valve chamber；

Cylinder body left side center is equipped with drainage cavity, and drainage cavity is located on the downside of discharge van and in communication, on the left of drainage cavity and Discharge outlet connection on left end cap is set.

Further, it is inlayed in the cylinder holes by the plunger bushing of the engineering plastics production of carbon fibre enhancing, or directly It is molded one layer of carbon fiber enhancement engineering plastics securely in cylinder holes inner wall.

Further, the plunger can be made of engineering structure ceramics or corrosion resistant alloy, and carry out at hardening to its surface Reason；Or in plunger surface spray layers ceramics or hard alloy, make the engineering plastics plunger bushing and case-hardened column of enhancing Plug constitutes friction pair, and the plunger is in hollow structure, the filled plastics in hollow plunger, or plug is arranged in its end.

Further, the piston shoes include the semicircle boots body made of corrosion resistant alloy, and semicircle boots body is equipped with ball-and-socket, Outside the cylindrical surface of interior, the semicircle boots body of the ball-and-socket of semicircle boots body and the sole of semicircle boots body has been covered each by the increasing of ball-and-socket carbon fiber Strong engineering plastics coating, cylindrical surface carbon fiber enhancement engineering plastics covering and sole carbon fiber enhancement engineering plastics covering；Institute The plunger ball for stating ball-and-socket and plunger forms antithesis friction pair；The cylindrical surface is fitted into the circular hole of return plate；The sole with The raceway surfaces for tilting the left thrust bearing of installation form antithesis friction pair.

Further, the plunger center is provided with limbers O, and pressure water energy is made swimmingly to flow to the top of plunger ball, Piston shoes bottom is flowed into through throttling pore R again；The piston shoes bottom being close to swash plate is provided with annular sealing strip C and inside and outside auxiliary branch Bearing surface E and A；It is required according to the difference of output pressure, flow and structure size, one of following three scheme can be respectively adopted: 1. annular sealing strip C and inside and outside aiding support face E and A is arranged；2. annular sealing strip C and interior aiding support face E is arranged；3. only Annular sealing strip C is set, aiding support face is not provided with.

Further, the main shaft is integrally formed with thrust swash plate, alternatively, being connected main shaft and thrust swash plate by flat key It is integrated.

Further, a radial ceramic ball bearing is inlayed at the center of the left thrust bearing；The seat of the left thrust bearing Circle is close to the sole of all piston shoes；Right thrust bearing is installed, the seat ring of right thrust bearing is tight on the right of the thrust swash plate Paste the inner face of pump case.

Further, in the centre bore of the pump case of the main shaft extension end, be equipped with rubber and plastic combination rotation water seal or Mechanical seal.

Further, the spool and valve seat of the inlet valve and discharge van are by enhancement engineering plastics, engineering ceramics or anti-corrosion Alloy is made, the reasonable disposition according to different require to spool response speed；Difference based on revolving speed and flow, spool are selected Cone cell spool, plate spool or ball spool.

Further, the inlet valve and discharge van form flat valve, according to the difference of maintenance and installation environment, inlet valve Radial installation or axial type installation in cylinder body with discharge van, or the installation of axial direction-radial, or axial direction-radial expansion formula peace Dress.

Wherein, radial is installed, the space small suitable for axial dimension；

Axial type installation, the space small suitable for radial dimension；

The installation of axial direction-radial, is rationally utilized radial and axial size, so that the size of pump is in appropriate size；

The installation of axial direction-radial expansion formula, discharge van is arranged on axial circumference at two circles or multi-turn, only slightly increases axial dimension Can significantly elevator pump flow.

Compared with the prior art, the advantages of the invention are

1. all antithesis friction pairs are all made of enhancement engineering plastics and engineering structure ceramics or anti-corrosion conjunction with self-lubricating property Gold pairing.All bearings are all made of novel full-ceramic bearing or stainless steel bearing or self-lubricating plain bearing.All friction is secondary It is lubricated by the water pumped and is cooled down, there is good friction, abrasion and greasy property, effectively improve the work of pump Reliability and service life.It has following technical advantage compared with the axial piston water pump of water-oil separating:

(1) present invention no longer installs any sealing device between plunger-cylinder holes, therefore completely avoiding must in water-oil separating pump This sealing device that must be installed is easy to the critical defect of failure.The functional reliability for substantially increasing pump, extends pump The MTBF(mean free error time).

(2) the unlubricated oil pocket of the present invention, operation and maintenance is very simple, and mechanical efficiency is higher.

(3) present invention does not have to any lubricating oil or grease, only it is noted that the material of selection is made to meet food and drug safety Requirement, the present invention can be not only used for sea water desalination, automatic assembly line, paper mill, timber processing and other fields, but also can be with It is promoted and applied in industries such as food, beverage, pharmaceutical factory, bioengineering, water treatment plants.

2. replacing valve plate distribution structure using Flat valve structure.It is highly suitable for pumping high pressure, low viscosity (such as seawater, light Water, HFA etc.) liquid, high-efficient , Kang sewage dye ability is strong, and intake performance is good, reliable operation.With the axial multiple plunger of valve plate distribution Pump is compared, and the present invention not only has the advantages that Duan Mian flow pump, in addition also has following technical advantage:

(1) Flat valve structure is that flow is carried out using the opening and closing of flow spool, and spool opens and closes height up to several millimeters, so resistance to sewage It contaminates very capable, the cleannes of water is not specially required.Installing high-precision filter is not needed in the entrance of pump, as long as general Fill 40~100 μm of aperture filter screen can, and this filter screen is again repeatable after back flush is clean It uses.

(2) there is good intake performance, do not need generally to add small pump.

(3) suitable application area and range are wide.It is especially used in the open system under the environment such as ocean, rivers and lakes, such as sea Water desalinates pump, the drainage pump in naval vessel, water mist pump, fire pump etc., has good service performance

3. flap type, cone valve, ball-valve structure can be respectively adopted in flat valve according to the difference of output flow and pressure size.Valve Core and valve seat are rationally matched using engineering plastics, corrosion resistant alloy or the engineering ceramics of enhancing.Keep the properties of flow excessively of flat valve good, inhales Enter performance raising, response is fast, and impact is small, and noise is low.

4. annular sealing strip is arranged in piston shoes sole, band is inside and outside to be respectively set aiding support.It is small that damping is opened at sole center Hole, introduces piston shoes sole for the high pressure water of plunger cavity, generates propulsive thrust by band, thus substantially reduces piston shoes and tiltedly Contact stress between disk can effectively reduce fretting wear, improve functional reliability and service life.By piston shoes sole center Damping hole be formed by liquid resistance and be formed by with sole band and damp constituted Double damping, it is special to be effectively prevented from In the case of compared with gross leak generation, make pump can remain higher volumetric efficiency.

5. cylinder body is fixed, swash plate is rotated with transmission shaft, this not only avoids the technical problem for using big bearing bearing cylinder body, And since the axle journal of both ends of the drive shaft is supported among cylinder center hole and pump housing centre bore by bearing, so the length of axis It is short, span is small, the stress of axis is small, deform it is small, the structure of whole device is extremely compact.

6. transmission shaft swash plate the right and left installs special axial ceramic roller thrust bearing respectively, left side thrust bearing Seat ring annular surface is directly contacted with piston shoes sole, forms very ideal ceramics-engineering plastics friction pair, and piston shoes and pottery Relative motion between porcelain circle is small, and PV value is small, therefore wears small, reliable operation.

7. in the pump case centre bore of transmission shaft extension end, can working environment according to the present invention, install rubber and plastic respectively Combination rotation water seal (when working under atmospheric environment) or mechanical seal (when underwater operation).Therefore the present apparatus both can be any It works under the atmospheric environment of height above sea level, the underwater operation of any depth can also be submerged in.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of first embodiment of the invention.

Fig. 2 is plunger of the invention and piston shoes assembling structure schematic diagram.

Fig. 3 is the schematic top plan view of piston shoes bottom structure in the present invention.

Fig. 4 is piston shoes bottom structure vertical section schematic diagram in the present invention.

Fig. 5 is the structural schematic diagram of thrust bearing in the present invention.

Fig. 6 is the structural schematic diagram of second embodiment of the invention.

Fig. 7 is the structural schematic diagram of third embodiment of the invention.

Fig. 8 is the structural schematic diagram of fourth embodiment of the invention.

Wherein, in Fig. 1: 1- left end cap, 2- extrude valve chamber, and 3- extrudes valve module, 4- flow distributing chamber (i.e. sucking valve outlet and pressure Valve inlet out), 5- suction valve assembly, 6- sucks valve chamber, 7- locking nut, 8- cylinder body, 9- pump case, 10- plunger bushing, 11- column Plug, 12- flexural pivot, 13- return plate, 14- piston shoes, 15- main shaft, 16- thrust swash plate, the right thrust bearing of 17-, 18- right bearing, 19- Right end cap attachment screw, the combination rotation water seal of 20- rubber and plastic, 21- right end cap, the left thrust bearing of 22-, 23- retracting spring, 24- are left Bearing, 25- pump case attachment screw, 26-O shape sealing ring, 27- discharge outlet, the water sucking mouth 28-, the inner cavity 29-, 30- cylinder holes, 31- column Fill in bulb, 32- drainage cavity.

In Fig. 2: 11- plunger, 14-1- piston shoes boots body, 14-2- ball-and-socket carbon fiber enhancement engineering plastics covering, 14-3- cylinder Face carbon fiber enhancement engineering plastics covering, 14-4- sole carbon fiber enhancement engineering plastics covering, the limbers 0-, R- damping hole.

In Fig. 3: the outer aiding support face A-, B- drain tank, C- band, D- intake chamber, aiding support face in E-, R- into Water damping hole.

Specific embodiment

The present invention is described in further detail below with reference to embodiment.

As shown in Figure 1, a kind of fully water lubricating axial multiple plunger water pump based on new engineering material, including cylinder body 8 and pump Shell 9,8 left end of cylinder body are connected with left end cap 1, left end cap O-ring 26 are equipped on the right side of left end cap 1, and left end cap 1 is equipped with row The mouth of a river 27 and water sucking mouth 28,8 right end of cylinder body are connect by pump case attachment screw 25 with pump case 9, and 9 right end of pump case is logical It crosses right end cap attachment screw 19 and right end cap 21 is installed, rubber and plastic combination rotation water seal 20 is equipped on the inside of right end cap 21；

The pump case 9 is equipped with the inner cavity 29 being connected to water sucking mouth, and main shaft 15,15 both ends of main shaft peace are equipped in the inner cavity 29 Equipped with main shaft left bearing 24 and main shaft right bearing 18, main shaft left bearing 24 and main shaft right bearing 18 are respectively supported at 8 center of cylinder body With 21 center of right end cap, and 15 right end of main shaft pass through right end cap 21 and rubber and plastic combination rotation water seal 20；

Thrust swash plate 16 is equipped in the middle part of the main shaft 15,16 two sides of thrust swash plate are separately installed with left thrust bearing 22 and right thrust Bearing 17；

It is evenly equipped with the odd number cylinder holes 30 parallel with 8 axis of cylinder body on the same circumference of 8 right end face of cylinder body, pacifies in cylinder holes 30 Equipped with plunger 11,8 right center of cylinder body is equipped with retracting spring 23, and left 22 side of thrust bearing is equipped with piston shoes 14, Piston shoes 14 are pressed on the toroidal race of left thrust bearing 22 by the retracting spring 23 by flexural pivot 12, return plate 13；It is described Plunger 11 is equipped with the plunger ball 31 cooperated with piston shoes 14；

11 bottom of plunger is equipped with the flow distributing chamber 4 being connected to plunger 11, is equipped with discharge van 3, flow distributing chamber 4 below flow distributing chamber 4 Top is equipped with inlet valve 5, and fixed by locking nut 7；Discharge van 3 and inlet valve 5, which are respectively equipped with, extrudes valve chamber 2 and sucking Valve chamber 6；

The 8 left side center of cylinder body is equipped with drainage cavity 32, and drainage cavity 32 is located at 3 downside of discharge van and in communication, drainage cavity 32 left sides are connected to the discharge outlet 27 being arranged on left end cap 1.

Further, it is inlayed in the cylinder holes 30 by the plunger bushing 10 of the engineering plastics production of carbon fibre enhancing, or It is directly molded one layer of carbon fiber enhancement engineering plastics securely in cylinder holes inner wall.

Further, the plunger 11 can be made of engineering structure ceramics or corrosion resistant alloy, and harden to its surface Processing；Or in 11 surface spray layers ceramics of plunger or hard alloy, keep the engineering plastics plunger bushing 10 of enhancing and surface hard The plunger 11 of change constitutes friction pair, and the plunger 11 is in hollow structure, the filled plastics in hollow plunger, or sets in its end Set plug.

Further, the piston shoes 14 include the semicircle boots body 14-1 made of corrosion resistant alloy, semicircle boots body 14-1 Equipped with ball-and-socket, in the ball-and-socket of semicircle boots body 14-1, outside the cylindrical surface of semicircle boots body and the sole difference of semicircle boots body It is covered with ball-and-socket carbon fiber enhancement engineering plastics covering 14-2, cylindrical surface carbon fiber enhancement engineering plastics covering 14-3 and sole carbon Fine enhancement engineering plastics covering 14-4；It is secondary that the plunger ball 31 of the ball-and-socket and plunger 11 forms antithesis friction；The cylinder Face is fitted into the circular hole of return plate 13；The sole and the raceway surfaces of the left thrust bearing 22 of inclination installation form antithesis friction It is secondary.

Further, 11 center of plunger is provided with limbers O, and pressure water energy is made swimmingly to flow to the top of plunger ball Portion, then piston shoes bottom is flowed into through throttling pore R；The piston shoes bottom being close to swash plate is provided with annular sealing strip C and inside and outside auxiliary Bearing surface E and A；According to output pressure, flow and structure size difference require, can be respectively adopted following three scheme it One: 1. annular sealing strip C and inside and outside aiding support face E and A are set；2. annular sealing strip C and interior aiding support face E is arranged；③ Annular sealing strip C is only set, aiding support face is not provided with.

Further, the main shaft 15 is integrally formed with thrust swash plate 16, alternatively, passing through flat key for main shaft 15 and thrust Swash plate 16 is linked together.

Further, a radial ceramic ball bearing is inlayed at the center of the left thrust bearing 22；The left thrust bearing 22 Seat ring be close to the sole of all piston shoes 14；The right of the thrust swash plate 16 is equipped with right thrust bearing 17, right thrust shaft Hold the inner face of 17 seat ring abutting pump case 9.

Further, in the centre bore of the pump case 9 of 15 extension end of main shaft, it is equipped with rubber and plastic combination rotation water seal 20 or mechanical seal.

Further, the spool and valve seat of the inlet valve 5 and discharge van 3 are by enhancement engineering plastics, engineering ceramics or resistance to Erosion alloy is made, the reasonable disposition according to different require to spool response speed；Difference based on revolving speed and flow, spool choosing With cone cell spool, plate spool or ball spool.

Further, the inlet valve 5 and discharge van 3 form flat valve, according to the difference of maintenance and installation environment, sucking Valve 5 and discharge van 3 radial installation or axial type installation in cylinder body 8, or the installation of axial direction-radial, or axial-radial direction expand The installation of exhibition formula.

Wherein, as shown in Figure 1, radial is installed, the space small suitable for axial dimension；

As shown in fig. 6, axial type is installed, the space small suitable for radial dimension；

As shown in fig. 7, axial direction-radial is installed, radial and axial size is rationally utilized, so that the size of pump is in appropriate Size；

As shown in figure 8, axial direction-radial expansion formula is installed, discharge van 5 is arranged on axial circumference at two circles or multi-turn, only slightly Increase axial dimension can significantly elevator pump flow.

Water pumping process of the invention is as follows: when prime mover drives main shaft 15 to rotate, main shaft 15 drives swash plate 16 to rotate.It returns Pressing force is equably applied on each piston shoes 14 by journey spring 23 by flexural pivot 12 and return plate 13, and piston shoes sole is forced to be close to It is slided on the seat ring annular surface of the left thrust bearing 22 of inclination installation, and cylinder body 8 is always static motionless, therefore, makes plunger 11 It is constantly moved back and forth in the plunger bushing 10 of cylinder body 8.

When plunger 11 moves right, the enclosed volume in plunger cavity increases, and pressure reduces.When the pressure drop in plunger cavity When as low as certain value, the force balance state of 5 spool of inlet valve is broken, and inhalation valve is opened, and water enters plunger from water sucking mouth Chamber, this just forms water absorption course.

When plunger 11 moves downward, the pressure in plunger cavity increases, and the spool of inlet valve 5 is forced to be closed, discharge van 3 Spool is opened, and the pressure water in plunger cavity is discharged from discharge outlet, here it is drainage procedures.

Main shaft 15 often rotates a circle, and each plunger forms a water absorption course and a drainage procedure.For shown in FIG. 1 Seven plunger pumps, the total displacement of each rotation are equivalent to the summation of seven single plunger pump displacement.And its discharge pressure is big It is small, it is unrelated with displacement depending on the size of load.

The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair Equivalent structure or equivalent flow shift made by bright specification and embodiment content, it is relevant to be applied directly or indirectly in other Technical field is included within the scope of the present invention.

Claims (10)

1. a kind of fully water lubricating axial multiple plunger water pump based on new engineering material, it is characterised in that: including cylinder body (8) and pump Shell (9), cylinder body (8) left end are connected with left end cap (1), are equipped with left end cap O-ring (26) on the right side of left end cap (1), left end It covers (1) and is equipped with discharge outlet (27) and water sucking mouth (28), cylinder body (8) right end passes through pump case attachment screw (25) and pump case Body (9) connection, pump case (9) right end are equipped with right end cap (21) by right end cap attachment screw (19), on the inside of right end cap (21) Rotation water seal (20) is combined equipped with rubber and plastic；

The pump case (9) is equipped with the inner cavity (29) being connected to water sucking mouth, is equipped with main shaft (15), main shaft in the inner cavity (29) (15) both ends are equipped with main shaft left bearing (24) and main shaft right bearing (18), main shaft left bearing (24) and main shaft right bearing (18) point It is not supported on cylinder body (8) center and right end cap (21) center, and main shaft (15) right end passes through right end cap (21) and rubber and plastic combination rotation Turn water seal (20)；

Thrust swash plate (16) are equipped in the middle part of the main shaft (15), thrust swash plate (16) two sides are separately installed with left thrust bearing (22) With right thrust bearing (17)；

The odd number cylinder holes (30) parallel with cylinder body (8) axis, cylinder holes are evenly equipped on the same circumference of cylinder body (8) right end face (30) it is equipped in plunger (11), cylinder body (8) right center is equipped with retracting spring (23), the left thrust bearing (22) Side is equipped with piston shoes (14), and piston shoes (14) are pressed on a left side and are stopped by the retracting spring (23) by flexural pivot (12), return plate (13) On the toroidal race of thrust bearing (22)；The plunger (11) is equipped with the plunger ball (31) cooperated with piston shoes (14)；

Plunger (11) bottom is equipped with the flow distributing chamber (4) being connected to plunger (11), is equipped with discharge van below flow distributing chamber (4) (3), it is equipped with inlet valve (5) above flow distributing chamber (4), and fixed by locking nut (7)；Discharge van (3) and inlet valve (5) point Valve chamber (2) and sucking valve chamber (6) She You not extruded；

Cylinder body (8) the left side center is equipped with drainage cavity (32), and drainage cavity (32) is located on the downside of discharge van (3) and connects therewith It is logical, it is connected on the left of drainage cavity (32) with the discharge outlet (27) being arranged on left end cap (1).

2. a kind of fully water lubricating axial multiple plunger water pump based on new engineering material according to claim 1, feature It is: is inlayed in the cylinder holes (30) by the plunger bushing (10) of the engineering plastics production of carbon fibre enhancing, or directly in cylinder Hole inner wall is molded one layer of carbon fiber enhancement engineering plastics securely.

3. a kind of fully water lubricating axial multiple plunger water pump based on new engineering material according to claim 1, feature Be: the plunger (11) can be made of engineering structure ceramics or corrosion resistant alloy, and carry out cure process to its surface；Or Plunger (11) surface spray layers ceramics or hard alloy, make the engineering plastics plunger bushing (10) and case-hardened plunger of enhancing (11) friction pair is constituted, the plunger (11) is in hollow structure, the filled plastics in hollow plunger, or stifled in the setting of its end Head.

4. a kind of fully water lubricating axial multiple plunger water pump based on new engineering material according to claim 1, feature Be: the piston shoes (14) include the semicircle boots body (14-1) made of corrosion resistant alloy, and semicircle boots body (14-1) is equipped with ball Nest, outside the cylindrical surface of interior, the semicircle boots body of ball-and-socket of semicircle boots body (14-1) and the sole of semicircle boots body is covered each by There are ball-and-socket carbon fiber enhancement engineering plastics covering (14-2), cylindrical surface carbon fiber enhancement engineering plastics covering (14-3) and sole carbon Fine enhancement engineering plastics covering (14-4)；It is secondary that the ball-and-socket and the plunger ball (31) of plunger (11) form antithesis friction；Institute Cylindrical surface is stated to be fitted into the circular hole of return plate (13)；The raceway surfaces shape of the sole and the left thrust bearing (22) of inclination installation It rubs at antithesis secondary.

5. a kind of fully water lubricating axial multiple plunger water pump based on new engineering material according to claim 1, feature Be: plunger (11) center is provided with limbers O, so that pressure water energy is swimmingly flow to the top of plunger ball, then through throttling Aperture R flows into piston shoes bottom；The piston shoes bottom being close to swash plate is provided with annular sealing strip C and inside and outside aiding support face E and A； It is required according to the difference of output pressure, flow and structure size, one of following three scheme can be respectively adopted: 1. setting annular Band C and inside and outside aiding support face E and A；2. annular sealing strip C and interior aiding support face E is arranged；3. only setting annular is close Envelope band C, is not provided with aiding support face.

6. a kind of fully water lubricating axial multiple plunger water pump based on new engineering material according to claim 1, feature Be: the main shaft (15) is integrally formed with thrust swash plate (16), alternatively, passing through flat key for main shaft (15) and thrust swash plate (16) it is linked together.

7. a kind of fully water lubricating axial multiple plunger water pump based on new engineering material according to claim 1, feature It is: inlays a radial ceramic ball bearing in the center of the left thrust bearing (22)；The seat ring of the left thrust bearing (22) with The sole of all piston shoes (14) is close to；Right thrust bearing (17), right thrust bearing are installed on the right of the thrust swash plate (16) (17) seat ring is close to the inner face of pump case (9).

8. a kind of fully water lubricating axial multiple plunger water pump based on new engineering material according to claim 1, feature It is: in the centre bore of the pump case (9) of the main shaft (15) extension end, is equipped with rubber and plastic combination rotation water seal (20) or machine Tool sealing.

9. a kind of fully water lubricating axial multiple plunger water pump based on new engineering material according to claim 1, feature Be: the spool and valve seat of the inlet valve (5) and discharge van (3) are by enhancement engineering plastics, engineering ceramics or corrosion resistant alloy system At the reasonable disposition according to different require to spool response speed；Difference based on revolving speed and flow, spool select mitre valve Core, plate spool or ball spool.

10. a kind of fully water lubricating axial multiple plunger water pump based on new engineering material according to claim 1, feature Be: the inlet valve (5) and discharge van (3) composition flat valve, according to maintenance and installation environment difference, inlet valve (5) and Discharge van (3) radial installation or axial type installation in cylinder body (8), or the installation of axial direction-radial, or axial direction-radial expansion Formula installation；

Wherein, radial is installed, the space small suitable for axial dimension；

Axial type installation, the space small suitable for radial dimension；

The installation of axial direction-radial, is rationally utilized radial and axial size, so that the size of pump is in appropriate size；

The installation of axial direction-radial expansion formula, discharge van is arranged on axial circumference at two circles or multi-turn, only slightly increases axial dimension Can significantly elevator pump flow.