CN102619720B - Plunger type motor pump - Google Patents

Plunger type motor pump Download PDF

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Publication number
CN102619720B
CN102619720B CN201210090290.4A CN201210090290A CN102619720B CN 102619720 B CN102619720 B CN 102619720B CN 201210090290 A CN201210090290 A CN 201210090290A CN 102619720 B CN102619720 B CN 102619720B
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cylinder
plunger
duct
rotor
suction chamber
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CN102619720A (en
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朱碧海
贺小峰
王伟伟
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Huazhong University of Science and Technology
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Huazhong University of Science and Technology
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Abstract

The invention discloses a plunger type motor pump, and belongs to a plunger pump. The problems of weak strength and low overall power density of a cylinder of the conventional plunger motor pump are solved. According to the plunger type motor pump, a motor stator is assembled in a housing. The two ends of the cylinder are supported in the centers of a left end cover and a right end cover respectively. A motor rotor is sleeved on and fixedly connected with a lug boss on the middle part of the cylinder. N plunger cavities are reserved in each of the left and right end faces of the lug boss of the cylinder. A plunger piston shoe component is arranged in each plunger cavity. Suction and forcing valve components are arranged in correspondence to each plunger piston shoe component on the lug boss of the cylinder. A left swash plate is fixed on the inner side of the left end cover, and a right swash plate is fixed on the inner side of the right end cover. The plate surfaces of the left and right swash plates are parallel. Every two coaxial plunger piston shoe components are pressed against each other through a support rod, and piston shoe heads at the two ends are pressed on the plate surfaces of the left and right swash plates respectively. Reverse thrust generated between the plunger piston shoe components at the two ends and the swash plates and hydraulic acting force in the cylinder are transmitted through the support rods, and internal reacting force is fully utilized, so that the number of the parts is decreased, the overall strength of the pump is strengthened, and the internal space utilization rate of the cylinder is increased.

Description

A kind of plunger type motor pump
Technical field
The invention belongs to plunger pump, particularly a kind of plunger type motor pump.
Background technique
Electric-motor pump is a kind of novel hydraulic power unit, and motor and pump are combined as entirety by it, simple and compact for structure, efficiency is high, amount of leakage is few, noise is low.Compared to " 3 stops " power unit that coupling in the past connects, electric-motor pump structure assembly degree is very high, and volume size has and reduces very greatly on basis in the past, be extremely easy to carry, and the very high special occasions of many narrow space environmental requirements can be directly used in.
The level of integration of electric-motor pump own is very high, it also makes its inner space very nervous while bringing the advantage of compact structure, when electric-motor pump works, in order to ensure phase mutual noninterference between the part of the inside and reliable and stable realize its function, a lot of very scabrous problem can be run in the setting of its structural parameter, especially electric-motor pump overall power density and pump integral rigidity, intensity balance choice between the two, often in order to ensure the intensity of electric-motor pump entirety, designer can only select the specific power of sacrificing electric-motor pump part, so how can effectively optimize electric-motor pump internal structure, the specific power that effectively can improve the electric-motor pump of compact structure is the biggest problem of facing of electric-motor pump development now.
The application number that claimant submits to is " Double-swashplate valve distributing axial plunger-type water hydraulic canned motor pump " of 201010103656.8, comprise shell, motor stator, rotor, cylinder body, plunger piston slippery boots assembly, return plate, ball pivot, swash plate and flow-distributing valve assembly, at cylinder body left and right sides symmetrical placement two swash plate, such design effectively can improve flow, but because the spatial constraints of both sides return plate and spherical hinge structure makes the pump cylinder support zone diameter of axle less than normal, and cavitation erosion is not produced while ensureing the overall flow of pump, the aperture of its water sucking mouth and setting-out mouth can not be too little, the wall thickness dimension at cylinder body two end supports position is so made greatly to cut down, have impact on the intensity of pump cylinder structure position, moreover, can not the becoming of water sucking mouth size also determines greatly the overall flow of pump and can not do greatly, hinders the raising of electric-motor pump specific power, reduces the development space of electric-motor pump to a great extent.
Summary of the invention
The invention provides a kind of plunger type motor pump, solve the problem that cylinder strength is on the weak side and overall power density is not high of existing plunger type motor pump.
A kind of plunger type motor pump provided by the present invention, comprise shell, motor stator, rotor, cylinder body, 2N plunger piston slippery boots assembly, left swash plate, right swash plate and 2N suction valve assembly and 2N delivery valve assembly, N is the odd number of 3 ~ 11, described shell, motor stator and rotor are cylindrical shape, motor stator is assemblied in shell, left end cap and right end cap are fixed on two ends, described shell left and right respectively by bolt, described cylinder body is the Step Shaft with middle part boss, its two ends are supported on left end cap center and right end cap center by tapered roller bearing respectively, left bearing lid by screw fastening at left end cap center, the tapered roller bearing of left end is held out against in cylinder body left end, left bearing lid center has oil through, in the middle part of cylinder body, projection section cover has rotor and is connected, rotor is positioned at motor stator inside and there is air gap between the two, cylinder body, rotor, motor stator three is coaxial, cylinder body longitudinal center line is as the central rotating shaft of rotor,
The left and right two ends of described cylinder body have axial inlet port and oil drain out, the left and right end face axial of cylinder body boss has circumferentially equally distributed N number of plunger cavity, N number of plunger cavity of the left and right end face of cylinder body boss is coaxial corresponding one by one, and by the first hole link; Be inlaid with plunger bushing in each plunger cavity, plunger bushing is built-in with the plunger piston slippery boots assembly of Spielpassung; Described cylinder body boss radial direction has N number of left suction chamber, N number of left extrusion chamber, N number of right suction chamber, N number of right extrusion chamber, and N number of left suction chamber, N number of left extrusion chamber, N number of right suction chamber and N number of right extrusion chamber are coaxial corresponding one by one; N number of left suction chamber position is corresponding with N number of plunger cavity position of cylinder body boss left side respectively, and is communicated with plunger cavity and inlet port; N number of left extrusion chamber is respectively by the second hole link oil drain out; N number of right suction chamber is respectively by the 3rd hole link inlet port; N number of right extrusion chamber is communicated with plunger cavity and oil drain out respectively; Respectively suction valve assembly is housed in N number of left suction chamber and N number of right suction chamber, in N number of left extrusion chamber and N number of right extrusion chamber, delivery valve assembly is housed respectively; It is characterized in that:
Fastening by locating stud with left swash plate, right swash plate respectively inside left end cap and inside right end cap, central coaxial, the card of described left swash plate and right swash plate are parallel;
Held mutually by the strut in described first duct between every two the coaxial corresponding plunger piston slippery boots assemblies of the left and right end face of described cylinder body boss, form plunger-piston shoes pair, each plunger-piston shoes are pressed in the card of left swash plate and right swash plate to two ends piston shoes head respectively;
Described cylinder body right-hand member stretches out right end cap, and adopt the oil drain out of screw plug closed cylinder right side, cylinder body right end side has the radial oil drainage hole of oil drain out described in UNICOM;
Right bearing lid by screw fastening in right end cap outer side center, tapered roller bearing is held in cylinder body right-hand member, described right bearing lid is the cylindrical shape of bottom lock, the inside is equipped with end cover, limited by the Cock screw through right bearing lid and rotate in a circumferential direction, end cover is the inwardly protruded cylinder of lower edges, its upper and lower bore and described cylinder body right-hand member major diameter fit, be placed on described cylinder body right-hand member, end cover one end is by the circlip axial limiting be embedded in right bearing lid; The radial oil drainage hole position of the corresponding described cylinder body right end side of described right bearing lid and end cover side has oil outlet; Hydraulic oil is communicated with extraneous hydraulic system by end cover with the oil outlet of right bearing lid from side of cylinder block oil drainage hole.
Described plunger type motor pump, is characterized in that:
Described left suction chamber, right suction chamber shape are identical, are secondary shoulder hole, and the upper hole larger by internal diameter and the less lower opening UNICOM of internal diameter are formed; Described suction valve assembly is made up of spool, spring, valve seat and bonnet, spool, spring, valve seat and bonnet are sequentially inserted in the upper hole of left suction chamber or right suction chamber, spool is spherical, be pressed in the lower opening place of left suction chamber or right suction chamber, form valve port, described spring one end withstands spool, the spring the other end withstands valve seat, valve seat is ring, have stepped shaft endoporus, withstood above valve seat by bonnet, described bonnet has undercut shape cross section, bonnet abdicates the position in the first duct after inserting the upper hole of left suction chamber or right suction chamber; The lower opening of N number of right suction chamber is communicated with inlet port by N number of 3rd duct;
Described left extrusion chamber, right extrusion cavity shape are identical, and be three grades of shoulder holes, hole, the upper, middle and lower UNICOM of being successively decreased successively by internal diameter is formed; Described delivery valve assembly is made up of spring, spool and valve gap, described spring is inserted in the mesopore in left extrusion chamber or right extrusion chamber, one end is spacing by lower opening, described spool and valve gap sequentially insert the upper hole in left extrusion chamber or right extrusion chamber, the spool pressing spring the other end, is withstood by valve gap above spool, and described valve gap has undercut shape cross section, valve gap abdicates the position in the first duct after inserting the upper hole in left extrusion chamber or right extrusion chamber; The lower opening in N number of left extrusion chamber is communicated with oil drain out by N number of second duct;
Described second duct and the 3rd duct are inclination duct, and they are uniformly distributed cylinder interior is alternate with each other, and completely cut off mutually between the second duct and the 3rd duct.
Second duct and the 3rd duct manufacturing process can adopt the method for casting, also can parts processing then at assembly welding.
Described plunger type motor pump, in the middle part of described cylinder body, projection section and rotor attachment can be: in the middle part of described cylinder body, boss left hand edge has seam step, the left side of rotor is withstood spacing by described seam step, and the right side of rotor and the right side of cylinder body boss are by flat key, sunk screw and thrust button tight joint.
In the middle part of described cylinder body, projection section and rotor attachment also can be: the left and right end face of rotor and the left and right end face of cylinder body boss are respectively by flat key, sunk screw and thrust button tight joint.
Working procedure of the present invention is as follows: when motor stator switches on power, the rotating magnetic field produced inside motor stator produces electromagnetic torque on rotor, under the effect of electromagnetic torque, the integrative-structure that rotor becomes with cylinder body tight joint rotates around cylinder body central axis, then the plunger piston slippery boots assembly be assemblied in cylinder body plunger cavity is driven to rotate together, because the parallel spacing of the swash plate assembly of cylinder body both sides limits, a pair plunger piston slippery boots assembly corresponding to cylinder body both sides is to reciprocating in plunger cavity back and forth under the effect that holds of strut, coordinate the periodicity opening and closing of suction valve assembly and the delivery valve assembly be installed in cylinder body simultaneously, plunger piston slippery boots assembly by hydraulic oil from the inlet port of cylinder body in inspiration cylinder body plunger cavity, and then the hydraulic oil of high pressure is pressed onto oil extraction end from the oil drain out of cylinder body, complete the suction-oil extraction process of electric-motor pump, end cover is set with in cylinder body oil extraction splaying, under cylinder body rotary course middle-end is enclosed within the effect of Cock screw, keep motionless, conservative control gap value size makes cylinder body oil extraction section and end inner room form stable rotary seal, enter the high pressure oil of oil extraction end owing to holding in the space of the rotary seal effect of cover and the formation of cylinder body oil extraction end smoothly by runner inlet end cover in cylinder body, and drain into extraneous hydraulic system for follow-up hydraulic equipment.
The working medium adopted in the present invention, is not limited to above-mentioned hydraulic oil, can be the medium that water or other hydraulic pressure installation adopt.
Compared with existing two inclined plate hydraulic plunger type electric-motor pump, the present invention has the following advantages:
1. fully effectively make use of the Interaction Force of cylinder interior hydraulic coupling and part, strut is introduced between two plungers of correspondence, by the effect of strut, two ends plunger piston slippery boots assembly and the reaction thrust produced between swash plate and cylinder interior hydraulic action are passed to a corresponding other end plug, impel its return motion, serve a kind of effect impelling plunger backhaul, thus eliminate the return mechanism of pump in traditional sense, comprise return plate, a series of part such as ball pivot and retracting spring, the number of pump component is decreased from structure, eliminate the trouble design of ball pivot simultaneously, ensure that the wall thickness of pump cylinder supporting section is (when designing ball pivot, because pump cylinder two end supports section needs through parts such as swash plate ball pivots, and be limited to ball pivot outside diameter within the specific limits, the size that ball pivot center hole can be allowed is limited, the cylinder body supporting section diameter of axle will certainly be made to attenuate, the strength and stiffness of very big weakening cylinder body), effectively improve the strength and stiffness of cylinder body.
2. greatly improve pump cylinder inner space utilization ratio, owing to being no longer subject to the constraint of a series of return mechanism size when pump cylinder designs, making pump cylinder inherence design flow distribution apparatus time space more sufficient, give the performance space that structural design is larger.
Accompanying drawing explanation
Fig. 1 is embodiment of the present invention plan view
Fig. 2 (A) is suction valve assembly assembling schematic diagram;
The left view that Fig. 2 (B) is Fig. 2 (A);
Fig. 3 (A) is delivery valve assembling components schematic diagram;
The left view that Fig. 3 (B) is Fig. 3 (A);
Fig. 4 is cylinder body centre section schematic diagram.
Mark in figure: bolt 1, left end cap 2, screw 3, left bearing lid 4, tapered roller bearing 5, locating stud 6, left swash plate 7, shell 8, plunger piston slippery boots assembly 9, plunger bushing 10, cylinder body 11, suction valve assembly 12, delivery valve assembly 13, strut 14, rotor 15, motor stator 16, right end cap 17, thrust button 18, right bearing lid 19, Cock screw 20, screw plug 21, end cover 22, circlip 23, right swash plate 24, first duct 25, second duct 26, 3rd duct 27, spool 28, spring 29, valve seat 30, bonnet 31, , valve gap 32.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further described.
As shown in Figure 1, the embodiment of the present invention comprises shell 8, motor stator 16, rotor 15, cylinder body 11, 10 plunger piston slippery boots assemblies 9, left swash plate 7, right swash plate 24 and 10 suction valve assemblies 12 and 10 delivery valve assemblies 13, described shell 8, motor stator 16 and rotor 15 are cylindrical shape, motor stator 16 is assemblied in shell 8, left end cap 2 and right end cap 17 are fixed on described shell about 8 two ends respectively by bolt 1, described cylinder body 11 is for having the Step Shaft of middle part boss, its two ends are supported on left end cap 2 center and right end cap 17 center by tapered roller bearing 5 respectively, left bearing lid 4 is fastened on left end cap 2 center by screw 3, the tapered roller bearing 5 of left end is held out against in cylinder body 11 left end, left bearing lid 4 center has oil through, in the middle part of cylinder body 11, projection section cover has rotor 15 and is connected, (the left and right end face of rotor 15 and the left and right end face of cylinder body 11 boss are respectively by flat key, sunk screw and thrust button 18 tight joint, ) to be positioned at motor stator 16 inner and there is air gap between the two for rotor 15, cylinder body 11, rotor 15, motor stator 16 three is coaxial, cylinder body longitudinal center line is as the central rotating shaft of rotor 15,
The described left and right two ends of cylinder body 11 have axial inlet port and oil drain out, the left and right end face axial of cylinder body boss has circumferentially equally distributed 10 plunger cavities, 10 plunger cavities of the left and right end face of cylinder body boss are coaxial corresponding one by one, and are communicated with by the first duct 25; Be inlaid with plunger bushing 10 in each plunger cavity, plunger bushing 10 is built-in with the plunger piston slippery boots assembly 9 of Spielpassung; Described cylinder body boss radial direction has 5 left suction chambers, 5 left extrusion chambeies, 5 right suction chambers, 5 right extrusion chambeies, and 5 left suction chambers, 5 left extrusion chambeies, 5 right suction chambers and 5 right extrusion chambeies are coaxial corresponding one by one; 5 left suction chamber positions are corresponding with 5 plunger cavity positions of cylinder body boss left side respectively, and are communicated with plunger cavity and inlet port; 5 left extrusion chambeies are communicated with oil drain out respectively by the second duct 26; 5 right suction chambers are communicated with inlet port respectively by the 3rd duct 27; 5 right extrusion chambeies are communicated with plunger cavity and oil drain out respectively; In 5 left suction chambers and 5 right suction chambers, suction valve assembly 12 is housed respectively, in 5 left extrusion chambeies and 5 right extrusion chambeies, delivery valve assembly 13 is housed respectively;
Fastening by locating stud 6 with left swash plate 7, right swash plate 24 respectively inside left end cap 2 and inside right end cap 17, central coaxial, the card of described left swash plate 7 and right swash plate 24 are parallel;
Held mutually by the strut 14 in described first duct 25 between every two the coaxial corresponding plunger piston slippery boots assemblies 9 of the left and right end face of described cylinder body boss, form plunger-piston shoes pair, each plunger-piston shoes are pressed in the card of left swash plate 7 and right swash plate 24 to two ends piston shoes head respectively;
Described cylinder body 11 right-hand member stretches out right end cap 17, and adopt the oil drain out of screw plug 21 closed cylinder 11 right side, cylinder body 11 right end side has the radial oil drainage hole of oil drain out described in UNICOM,
Right bearing lid 19 is fastened on right end cap 17 outer side center by screw 3, tapered roller bearing 5 is held in cylinder body 11 right-hand member, described right bearing lid 19 is the cylindrical shape of bottom lock, the inside is equipped with end cover 22, limited by the Cock screw 20 through right bearing lid 19 and rotate in a circumferential direction, end cover 22 is the inwardly protruded cylinder of lower edges, its upper and lower bore and described cylinder body 11 right-hand member major diameter fit, be placed on described cylinder body 11 right-hand member, end cover 22 one end is by circlip 23 axial limiting be embedded in right bearing lid 19; The radial oil drainage hole position of corresponding described cylinder body 11 right end side of described right bearing lid 19 and end cover 22 side has oil outlet; Hydraulic oil is communicated with extraneous hydraulic system by end cover 22 with the oil outlet of right bearing lid 19 from cylinder body 11 side oil drainage hole.
As shown in Fig. 2 (A), Fig. 2 (B), described left suction chamber, right suction chamber shape are identical, are secondary shoulder hole, and the upper hole larger by internal diameter and the less lower opening UNICOM of internal diameter are formed, described suction valve assembly 12 is by spool 28, spring 29, valve seat 30 and bonnet 31 form, spool 28, spring 29, valve seat 30 and bonnet 31 are sequentially inserted in the upper hole of left suction chamber or right suction chamber, spool 28 is spherical, be pressed in the lower opening place of left suction chamber or right suction chamber, form valve port, spool 28 is withstood in described spring 29 one end, spring 29 the other end withstands valve seat 30, valve seat 30 is ring, there is stepped shaft endoporus, withstood by bonnet 31 above valve seat 30, described bonnet 31 has undercut shape cross section, after bonnet 31 inserts the upper hole of left suction chamber or right suction chamber, abdicate the position in the first duct 25, the lower opening of 5 right suction chambers is communicated with inlet port by 5 the 3rd ducts 27,
As shown in Fig. 3 (A), Fig. 3 (B), described left extrusion chamber, right extrusion cavity shape are identical, and be three grades of shoulder holes, hole, the upper, middle and lower UNICOM of being successively decreased successively by internal diameter is formed; Described delivery valve assembly is made up of spring 29, spool 28 and valve gap 32, described spring 29 is inserted in the mesopore in left extrusion chamber or right extrusion chamber, one end is spacing by lower opening, described spool 28 and valve gap 32 sequentially insert the upper hole in left extrusion chamber or right extrusion chamber, spool 28 pressing spring 29 the other end, is withstood by valve gap 32 above spool 28, and described valve gap 32 has undercut shape cross section, after valve gap 32 inserts the upper hole in left extrusion chamber or right extrusion chamber, abdicate the position in the first duct 25; The lower opening in 5 left extrusion chambeies is communicated with oil drain out by 5 the second ducts 26;
As shown in Figure 4, described second duct 26 and the 3rd duct 27 are inclination duct, and they are uniformly distributed cylinder interior is alternate with each other, and completely cut off mutually between the second duct 26 and the 3rd duct 27.
Second duct 26 and the 3rd duct 27 manufacturing process can adopt the method for casting, also can parts processing then at assembly welding.
In the middle part of described cylinder body 11, projection section and rotor 15 attachment are: in the middle part of described cylinder body 11, boss left hand edge has seam step, the left side of rotor 15 is withstood spacing by described seam step, and the right side of rotor 15 and the right side of cylinder body 11 boss are by flat key, sunk screw and thrust button 18 tight joint.
In the middle part of described cylinder body 11, projection section and rotor 15 attachment can also be:
The left and right end face of rotor 15 and the left and right end face of cylinder body 11 boss are respectively by flat key, sunk screw and thrust button 18 tight joint.

Claims (4)

1. a plunger type motor pump, comprise shell (8), motor stator (16), rotor (15), cylinder body (11), 2N plunger piston slippery boots assembly (9), left swash plate (7), right swash plate (24) and 2N suction valve assembly (12) and 2N delivery valve assembly (13), N is the odd number of 3 ~ 11, described shell (8), motor stator (16) and rotor (15) are cylindrical shape, motor stator (16) is assemblied in shell (8), left end cap (2) and right end cap (17) are fixed on described shell (8) two ends, left and right respectively by bolt (1), described cylinder body (11) is for having the Step Shaft of middle part boss, its two ends are supported on left end cap (2) center and right end cap (17) center by tapered roller bearing (5) respectively, left bearing lid (4) is fastened on left end cap (2) center by screw (3), the tapered roller bearing (5) of left end is held out against in cylinder body (11) left end, left bearing lid (4) center has oil through, cylinder body (11) middle part projection section cover has rotor (15) and is connected, rotor (15) is positioned at motor stator (16) inside and there is air gap between the two, cylinder body (11), rotor (15), motor stator (16) three is coaxial, cylinder body longitudinal center line is as the central rotating shaft of rotor (15),
Described cylinder body (11) left and right two ends have axial inlet port and oil drain out, the left and right end face axial of cylinder body boss has circumferentially equally distributed N number of plunger cavity, N number of plunger cavity of the left and right end face of cylinder body boss is coaxial corresponding one by one, and is communicated with by the first duct (25); Be inlaid with plunger bushing (10) in each plunger cavity, plunger bushing (10) is built-in with the plunger piston slippery boots assembly (9) of Spielpassung; Described cylinder body boss radial direction has N number of left suction chamber, N number of left extrusion chamber, N number of right suction chamber, N number of right extrusion chamber, and N number of left suction chamber, N number of left extrusion chamber, N number of right suction chamber and N number of right extrusion chamber are coaxial corresponding one by one; N number of left suction chamber position is corresponding with N number of plunger cavity position of cylinder body boss left side respectively, and is communicated with plunger cavity and inlet port; N number of left extrusion chamber is communicated with oil drain out respectively by the second duct (26); N number of right suction chamber is communicated with inlet port respectively by the 3rd duct (27); N number of right extrusion chamber is communicated with plunger cavity and oil drain out respectively; In N number of left suction chamber and N number of right suction chamber, suction valve assembly (12) is housed respectively, in N number of left extrusion chamber and N number of right extrusion chamber, delivery valve assembly (13) is housed respectively;
Fastening by locating stud (6) with left swash plate (7), right swash plate (24) respectively inside left end cap (2) inner side and right end cap (17), central coaxial, the card of described left swash plate (7) and right swash plate (24) are parallel;
Described cylinder body (11) right-hand member stretches out right end cap (17), adopt the oil drain out of screw plug (21) closed cylinder (11) right side, cylinder body (11) right end side has the radial oil drainage hole of oil drain out described in UNICOM
Right bearing lid (19) is fastened on right end cap (17) outer side center by screw (3), tapered roller bearing (5) is held in cylinder body (11) right-hand member, the cylindrical shape that described right bearing lid (19) is bottom lock, the inside is equipped with end cover (22), limited by the Cock screw (20) through right bearing lid (19) and rotate in a circumferential direction, end cover (22) is the inwardly protruded cylinder of lower edges, its upper and lower bore and described cylinder body (11) right-hand member major diameter fit, be placed on described cylinder body (11) right-hand member, end cover (22) one end is by circlip (23) axial limiting be embedded in right bearing lid (19), the radial oil drainage hole position of corresponding described cylinder body (11) right end side of described right bearing lid (19) and end cover (22) side has oil outlet, hydraulic oil is communicated with extraneous hydraulic system by end cover (22) with the oil outlet of right bearing lid (19) from cylinder body (11) side oil drainage hole, it is characterized in that:
Held mutually by the strut (14) in described first duct (25) between every two the coaxial corresponding plunger piston slippery boots assemblies (9) of the left and right end face of described cylinder body boss, form plunger-piston shoes pair, each plunger-piston shoes are pressed in the card of left swash plate (7) and right swash plate (24) respectively to two ends piston shoes head.
2. plunger type motor pump as claimed in claim 1, is characterized in that:
Described left suction chamber, right suction chamber shape are identical, are secondary shoulder hole, and the upper hole larger by internal diameter and the less lower opening UNICOM of internal diameter are formed, described suction valve assembly (12) is by spool (28), spring (29), valve seat (30) and bonnet (31) composition, spool (28), spring (29), valve seat (30) and bonnet (31) are sequentially inserted in the upper hole of left suction chamber or right suction chamber, spool (28) is for spherical, be pressed in the lower opening place of left suction chamber or right suction chamber, form valve port, spool (28) is withstood in described spring (29) one end, spring (29) the other end withstands valve seat (30), valve seat (30) is ring, there is stepped shaft endoporus, valve seat (30) top is withstood by bonnet (31), described bonnet (31) has undercut shape cross section, after bonnet (31) inserts the upper hole of left suction chamber or right suction chamber, abdicate the position of the first duct (25), the lower opening of N number of right suction chamber is communicated with inlet port by N number of 3rd duct (27),
Described left extrusion chamber, right extrusion cavity shape are identical, and be three grades of shoulder holes, hole, the upper, middle and lower UNICOM of being successively decreased successively by internal diameter is formed, described delivery valve assembly is by spring (29), spool (28) and valve gap (32) composition, described spring (29) is inserted in the mesopore in left extrusion chamber or right extrusion chamber, one end is spacing by lower opening, described spool (28) and valve gap (32) sequentially insert the upper hole in left extrusion chamber or right extrusion chamber, spool (28) pressing spring (29) the other end, spool (28) top is withstood by valve gap (32), described valve gap (32) has undercut shape cross section, after valve gap (32) inserts the upper hole in left extrusion chamber or right extrusion chamber, abdicate the position of the first duct (25), the lower opening in N number of left extrusion chamber is communicated with oil drain out by N number of second duct (26),
Described second duct (26) and the 3rd duct (27) are inclination duct, and they are uniformly distributed cylinder interior is alternate with each other, and completely cut off mutually between the second duct (26) and the 3rd duct (27).
3. plunger type motor pump as claimed in claim 1 or 2, is characterized in that:
Described cylinder body (11) middle part projection section and rotor (15) attachment are: described cylinder body (11) middle part boss left hand edge has seam step, the left side of rotor (15) is withstood spacing by described seam step, and the right side of rotor (15) and the right side of cylinder body (11) boss are by flat key, sunk screw and thrust button (18) tight joint.
4. plunger type motor pump as claimed in claim 1 or 2, is characterized in that:
Described cylinder body (11) middle part projection section and rotor (15) attachment are: the left and right end face of rotor (15) and the left and right end face of cylinder body (11) boss are respectively by flat key, sunk screw and thrust button (18) tight joint.
CN201210090290.4A 2012-03-30 2012-03-30 Plunger type motor pump Active CN102619720B (en)

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CN105781925B (en) * 2016-03-07 2018-06-29 同济大学 A kind of axial plunger piston hydraulic electric motor pump
CN107939758B (en) * 2017-11-29 2020-04-17 四川航天烽火伺服控制技术有限公司 Double plunger valve flow distribution load sensitive linear motor pump
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