CN214836933U

CN214836933U - Double-ball disc two-dimensional plunger motor pump

Info

Publication number: CN214836933U
Application number: CN202120347203.3U
Authority: CN
Inventors: 裘信国; 徐钢锋; 赏鸿斌; 王晨; 姜伟; 阮健
Original assignee: Zhejiang University of Technology ZJUT
Current assignee: Zhejiang University of Technology ZJUT
Priority date: 2021-02-07
Filing date: 2021-02-07
Publication date: 2021-11-23
Anticipated expiration: 2031-02-07

Abstract

The double-ball disc two-dimensional plunger motor pump comprises a motor shell, wherein the motor shell is provided with a stator, a rotor and a plunger pump body, the stator and the motor shell are relatively fixed, the rotor is rotatably arranged in the stator, a rotating sleeve is arranged in the rotor, the plunger pump body is arranged in the rotating sleeve, and the plunger pump body comprises a pump core assembly and a transmission assembly; the pump core assembly comprises a cylinder body, wherein a plunger is arranged in the cylinder body and can do linear reciprocating motion along the axial direction of the cylinder body; the transmission assembly comprises a main shaft left cam guide rail, a main shaft right cam guide rail and a cam follower, and the plunger does linear reciprocating motion under the constraint of the cam follower while rotating along with the main shaft; the left distributing groove and the right distributing groove on the plunger are respectively communicated with the oil absorption window and the oil discharge window on the cylinder body, the cavity with gradually increased volume absorbs oil, and the cavity with gradually decreased volume discharges oil. The utility model has the advantages of compact structure, small volume, light weight, low noise, high efficiency, no external leakage and the like.

Description

Double-ball disc two-dimensional plunger motor pump

Technical Field

The utility model relates to a motor pump technical field especially relates to two ball disc two dimension plunger motor pumps.

Background

The hydraulic technology has the outstanding advantages of high power density, flexible element arrangement, convenient control, good dynamic characteristic, easy realization of linear motion and the like, and is one of the key technologies of modern transmission and control. The traditional hydraulic power source is a three-section structure consisting of an electric motor, a coupling and a hydraulic pump, but the traditional hydraulic power source has large volume and weight. The volume and the weight of a hydraulic pump serving as the core of the hydraulic power unit are only about 12% of those of a motor with the same power, the motor occupies the most of the whole structure of the volume of the whole hydraulic power unit, the size is large, the shaft end leaks, and the vibration noise is severe.

Disclosure of Invention

In order to overcome the problems, the utility model provides a two-dimensional plunger motor pump of two ball disc.

The utility model adopts the technical proposal that: the double-ball disc two-dimensional plunger motor pump comprises a cylindrical motor shell with openings at two ends, wherein a left end cover and a right end cover are respectively connected to two ends of the motor shell, a stator, a rotor and a plunger pump body are arranged in a cavity formed among the motor shell, the left end cover and the right end cover, the stator and the motor shell are relatively fixed, the rotor is rotatably arranged in the stator, a rotating sleeve is arranged in the rotor, the plunger pump body is arranged in the rotating sleeve, axial leads of the stator, the rotor, the rotating sleeve and the plunger pump body are collinear, and the plunger pump body comprises a pump core assembly and a transmission assembly;

the pump core assembly comprises a cylindrical shell and a cylinder body, the shell is arranged in the rotor, the cylinder body is arranged in the shell, and the left end face of the cylinder body is provided with an oil suction hole and an oil discharge hole; the outer surface of the cylinder body is provided with a first semi-annular groove and a second semi-annular groove, the oil suction hole is communicated with the first semi-annular groove, and the oil discharge hole is communicated with the second semi-annular groove; a plunger is arranged in the cylinder body and can do linear reciprocating motion along the axial direction of the cylinder body; the left end of the plunger and the cylinder body enclose a left chamber, the right end of the plunger and the cylinder body enclose a right chamber, the volumes of the left chamber and the right chamber change along with the reciprocating motion of the plunger, when the plunger axially moves from the leftmost end to the rightmost end, the volume of the left chamber gradually increases, and the volume of the right chamber gradually decreases; conversely, when the plunger axially moves from the rightmost end to the leftmost end, the volume of the right chamber gradually increases, and the volume of the left chamber gradually decreases;

the outer surface of the plunger is uniformly provided with two left distributing grooves and two right distributing grooves with opposite opening directions at intervals, the notch positions of the left distributing grooves and the notch positions of the right distributing grooves are staggered, the positions of the cylinder body corresponding to the left distributing grooves and the right distributing grooves are provided with an oil absorption window and an oil discharge window, the oil absorption window is communicated with the first semi-annular groove, and the oil discharge window is communicated with the second semi-annular groove;

the transmission assembly comprises a main shaft, a left cam guide rail, a right cam guide rail and a cam follower, the right end of the main shaft penetrates out of the cylinder body rightwards, the left cam guide rail and the right cam guide rail which are provided with equal-addition equal-deceleration curved surface tracks are fixedly installed in a rotating sleeve on the right side of the cylinder body, the phase difference between the left cam guide rail and the right cam guide rail is 90 degrees, namely the highest point and the lowest point of the left cam guide rail correspond to the lowest point and the highest point of the right cam guide rail respectively; a cam follower is fixedly connected to the position, which is positioned on the main shaft and between the left cam guide rail and the right cam guide rail, and comprises a left disc and a right disc, and the structures of the left disc and the right disc are in mirror symmetry; four threaded holes are uniformly distributed in the circumferential direction of the left circular disc, wherein two threaded holes which are opposite up and down are internally and rotatably provided with fixed steel ball rollers, the fixed steel balls are mechanically connected with the left circular disc through straight threads, the outer ends of the fixed steel ball rollers are in contact with the left cam guide rail, and the other two threaded holes are fixedly connected with the right circular disc; the left disc and the right disc are fixedly arranged on the main shaft and are fixedly connected with each other, and the fixed steel ball rollers on the left disc and the right disc are respectively contacted with the left cam guide rail and the right cam guide rail; the part of the main shaft, which is positioned in the cylinder body, is provided with a plunger, and the plunger rotates along with the main shaft and simultaneously makes linear reciprocating motion under the restraint of the left cam guide rail, the right cam guide rail and the cam follower; the left distributing groove and the right distributing groove on the plunger are respectively communicated with the oil absorption window and the oil discharge window on the cylinder body, the cavity with gradually increased volume absorbs oil, and the cavity with gradually decreased volume discharges oil;

a fixed shaft radially penetrates through the right end of the main shaft, bearings are connected to two ends of the fixed shaft, a sleeve is sleeved at the right end of the main shaft, and the right end of the sleeve is fixedly connected with the rotor; the sleeve is provided with an axial sliding groove at a position corresponding to the bearing, the bearing is arranged in the sliding groove, and the bearing can roll in the sliding groove.

Further, the stator comprises a stator core, a winding clamping groove is formed in the stator core, a winding is wound in the winding clamping groove, and a groove wedge matched with a notch of the winding clamping groove is formed in the stator core; the rotor comprises a rotor core, a magnetic steel groove is arranged on the rotor core, and magnetic steel is arranged in the magnetic steel groove; and two ends of the rotor core are provided with circular ring type magnetic isolation plates.

Furthermore, the left disc and the right disc are fixedly connected through socket head cap screws.

The utility model has the advantages that: the rotor of the permanent magnet synchronous motor and the rotor of the two-dimensional plunger pump are combined, so that the hydraulic pump and the motor are integrated. The shaft coupling and the cooling fan are omitted, the size is small, the weight is light, leakage at the end of the outward extending shaft is avoided, and vibration and noise are greatly reduced. The device has a series of outstanding advantages of compact structure, small volume, low noise, high efficiency, no external leakage and the like, and is particularly suitable for being applied to occasions of silence, cleanness and the like.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a side view of the present invention.

Fig. 3 is a sectional view taken along the line a-a in fig. 2.

Fig. 4 is a schematic structural view of the plunger pump body.

Fig. 5 is a sectional view taken along line B-B in fig. 4.

Fig. 6 is a schematic structural view of the cylinder.

Fig. 7 is a left side view of the cylinder.

Fig. 8 is a schematic view of the u-shaped structure of the present invention.

Fig. 9 is a schematic structural view of the plunger of the present invention.

Description of reference numerals: 1-1, right end cover; 1-2, a motor shell; 1-3, a left end cover; 3-1, a shell; 3-2, left chamber; 3-3, a cylinder body; 3-4, oil suction holes; 3-5, oil drain holes; 3-6 plunger; 3-7, a first semi-annular groove; 3-8, a second half annular groove; 4-1, a left disc; 4-2, right disc; 4-3, a fixed steel ball roller, 4-4 and a right cam guide rail; 4-5, a main shaft; 5. a stator core; 5-1, rotating the sleeve; 6. a winding; 7. a magnetic shield plate; 8. magnetic steel; 9. a slot wedge; 10. a left distributing groove; 11. a right distributing groove; 12. a sleeve; 13. a fixed shaft; 14. bearing, 15, spout.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the directions or positional relationships indicated as the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., appear based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" as appearing herein are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" should be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to the attached drawings, the double-ball disc two-dimensional plunger motor pump comprises a cylindrical motor shell 1-2 with openings at two ends, wherein two ends of the motor shell 1-2 are respectively connected with a left end cover 1-3 and a right end cover 1-1, a stator, a rotor and a plunger pump body are arranged in a cavity formed among the motor shell 1-2, the left end cover 1-3 and the right end cover 1-1, the stator and the motor shell 1-2 are relatively fixed, the rotor is rotatably arranged in the stator, the stator comprises a stator iron core, a winding clamping groove is formed in the stator iron core 5, a winding 6 is wound in the winding clamping groove, and a slot wedge 9 matched with a slot opening of the winding clamping groove is formed in the stator iron core 5; the rotor comprises a rotor core, a magnetic steel groove is arranged on the rotor core, and magnetic steel 8 is arranged in the magnetic steel groove; and two ends of the rotor core are provided with circular ring type magnetic isolation plates 7. The rotor is internally provided with a rotating sleeve 5-1, a plunger pump body is arranged in the rotating sleeve 5-1, the axial leads of the stator, the rotor, the rotating sleeve 5-1 and the plunger pump body are collinear, and the plunger pump body comprises a pump core assembly and a transmission assembly;

the pump core assembly comprises a cylindrical outer shell 3-1 and a cylinder body 3-3, the outer shell 3-1 is arranged in the rotor, the cylinder body 3-3 is arranged in the outer shell 3-1, and the left end face of the cylinder body 3-3 is provided with an oil suction hole 3-4 and an oil discharge hole 3-5; the outer surface of the cylinder body 3-3 is provided with a first semi-annular groove 3-7 and a second semi-annular groove 3-8, the oil suction hole 3-4 is communicated with the first semi-annular groove 3-7, and the oil discharge hole 3-5 is communicated with the second semi-annular groove 3-8; a plunger 3-6 is arranged in the cylinder 3-3, the plunger 3-6 is fixed on the main shaft 4-5, and the plunger 3-6 can do linear reciprocating motion along the axial direction of the cylinder 3-3; the left end of the plunger 3-6 and the cylinder 3-3 enclose a left chamber 3-2, the right end of the plunger 3-6 and the cylinder 3-3 enclose a right chamber, the volumes of the left chamber 3-2 and the right chamber change along with the reciprocating motion of the plunger 3-6, when the plunger 3-6 axially moves from the leftmost end to the rightmost end, the volume of the left chamber 3-2 gradually increases, and the volume of the right chamber gradually decreases; conversely, when the plunger 3-6 moves axially from the rightmost end to the leftmost end, the volume of the right chamber gradually increases, and the volume of the left chamber gradually decreases;

the outer surface of the plunger 3-6 is uniformly provided with two left flow distribution grooves 10 and two right flow distribution grooves 11 with opposite opening directions at intervals, the notch positions of the left flow distribution grooves 10 and the right flow distribution grooves 11 are arranged in a staggered manner, the positions of the cylinder body 3-3 corresponding to the left flow distribution grooves 10 and the right flow distribution grooves 11 are provided with an oil absorption window and an oil discharge window, the oil absorption window is communicated with the first half annular groove 3-7, and the oil discharge window is communicated with the second half annular groove 3-8;

the transmission assembly comprises a main shaft 4-5, a left cam guide rail, a right cam guide rail 4-4 and a cam follower, the right end of the main shaft 4-5 penetrates out of the cylinder body 3-3 rightwards, a left cam guide rail and a right cam guide rail 4-4 which have the same equal deceleration curved surface track are fixedly installed in a rotating sleeve 5-1 on the right side of the cylinder body 3-3, the phase difference between the left cam guide rail and the right cam guide rail 4-4 is 90 degrees, namely the highest point and the lowest point of the left cam guide rail correspond to the lowest point and the highest point of the right cam guide rail 4-4 respectively; a cam follower is fixedly connected to the main shaft 4-5 and positioned between the left cam guide rail and the right cam guide rail 4-4, the cam follower comprises a left disc 4-1 and a right disc 4-2, and the left disc 4-1 and the right disc 4-2 are in mirror symmetry; four threaded holes are uniformly distributed in the circumferential direction of the left disc 4-1, wherein two threaded holes which are opposite up and down are internally and rotatably provided with fixed steel ball rollers, one part of a fixed steel ball is exposed out of the left disc 4-1 and is contacted with the left cam guide rail, and the other two threaded holes are fixedly connected with the right disc 4-2; the left disc 4-1 and the right disc 4-2 are fixedly arranged on the main shaft 4-5 and are fixedly connected with each other through hexagon socket head cap screws, and fixed steel balls on the left disc 4-1 and the right disc 4-2 are respectively contacted with a left cam guide rail and a right cam guide rail 4-4 corresponding to the fixed steel balls; the part of the main shaft 4-5, which is positioned in the cylinder body 3-3, is provided with a plunger 3-6, and the plunger 3-6 does linear reciprocating motion under the restriction of the left cam guide rail, the right cam guide rail and the cam follower while rotating along with the main shaft 4-5; the left distributing groove and the right distributing groove on the plungers 3-6 are respectively communicated with an oil absorption window and an oil discharge window on the cylinder body, the chambers with gradually increased volumes absorb oil, and the chambers with gradually decreased volumes discharge oil;

a fixed shaft 13 radially penetrates through the right end of the main shaft 4-5, two ends of the fixed shaft are exposed out of the main shaft and are connected with bearings 14, a sleeve 12 is sleeved at the right end of the main shaft, and the sleeve 12 is fixedly connected with the rotor; an axial sliding groove 15 is formed in the position, corresponding to the bearing 14, of the sleeve 12, the bearing 14 is arranged in the sliding groove 15, and the bearing 14 can roll in the sliding groove 15.

The utility model discloses an integrate motor and two-dimentional plunger pump in an organic whole, the main shaft cartridge passes through muffjoint with rotor and main shaft together inside electric motor rotor. The fixed steel balls on the left disc and the right disc are matched with the left cam guide rail and the right cam guide rail to move, so that the plunger realizes linear motion; the right end of the main shaft is connected with the rotor through a sleeve, and the sleeve can allow the main shaft to axially displace and simultaneously rotate along with the rotor; when the rotor transmits torque to the plunger through the main shaft to drive the plunger to rotate in the circumferential direction, the outer surface of the plunger is circumferentially provided with a left flow distribution groove and a right flow distribution groove, when hydraulic oil enters from the oil inlet and enters the cylinder body through the first semi-annular groove, the two left flow distribution grooves and the two right flow distribution grooves which are arranged on the surface of the plunger are mutually distributed with the oil inlet and the oil outlet, oil absorption and oil discharge are carried out through two degrees of freedom of the plunger, the plunger starts to move rightwards due to the constraint of the cam, the oil flows into the cylinder body from the oil inlet and passes through the two oil inlet windows, after entering the two left flow distribution grooves, the volume of a left cavity is increased to absorb oil, when the plunger rotates for a certain angle, the plunger moves leftwards, a left cavity is reduced, the oil in the left cavity flows out from the oil outlet through the oil outlet window and the second semi-annular groove, meanwhile, the volume of the right cavity is gradually increased, and the oil enters the two right flow distribution grooves to absorb oil, under the continuous rotating work of the motor, the window communicated with the oil discharge hole of the pump continuously discharges oil, and the window communicated with the oil inlet continuously absorbs oil, so that the plunger can do linear reciprocating motion of rotating circumferential rotation while doing left-right axial motion. The oil sucking and discharging function is realized by utilizing the two-way freedom degree of the plunger in the horizontal and rotary motion.

The embodiments described in this specification are merely illustrative of implementations of the inventive concepts, and the scope of the invention should not be considered limited to the specific forms set forth in the embodiments, but rather the scope of the invention is intended to include equivalent technical means as would be understood by those skilled in the art from the inventive concepts.

Claims

1. Two ball disc two dimension plunger motor pumps, including both ends open-ended cylindric motor casing, the both ends of motor casing are connected with left end housing and right-hand member end cover respectively, are equipped with the stator, the rotor and the plunger pump body in the cavity that forms between motor casing, left end housing and the right-hand member lid, and stator and motor casing relatively fixed, the rotor sets up its characterized in that at the stator internal rotation: the rotor is internally provided with a rotating sleeve, a plunger pump body is arranged in the rotating sleeve, the axial leads of the stator, the rotor, the rotating sleeve and the plunger pump body are collinear, and the plunger pump body comprises a pump core assembly and a transmission assembly;

2. The dual ball disc two dimensional plunger motor pump of claim 1, wherein: the stator comprises a stator iron core, a winding clamping groove is formed in the stator iron core, a winding is wound in the winding clamping groove, and a slot wedge matched with a notch of the winding clamping groove is formed in the stator iron core; the rotor comprises a rotor core, a magnetic steel groove is arranged on the rotor core, and magnetic steel is arranged in the magnetic steel groove; and two ends of the rotor core are provided with circular ring type magnetic isolation plates.

3. The dual ball disc two dimensional plunger motor pump of claim 1, wherein: the left disc and the right disc are fixedly connected through the socket head cap screws.