阅读说明：本技术 基于端面点接触的二维柱塞泵 (Two-dimensional plunger pump based on end surface point contact ) 是由 裘信国 徐钢锋 王晨 阮健 于 2021-02-07 设计创作，主要内容包括：基于端面点接触的二维柱塞泵,包括泵芯组件和传动组件,泵芯组件包括缸体,缸体设置在左壳体内,左端盖上开有吸油孔和排油孔；缸体内设有柱塞,且柱塞可沿缸体的轴向作直线往复运动；柱塞的左端与缸体围合成左腔室,柱塞的右端与缸体围合成右腔室,左腔室、右腔室的容积随柱塞的往复运动变化；柱塞的外表面间隔均布有开口方向相反的左配流槽和右配流槽各两个；传动组件包括主轴和凸轮从动件,柱塞在随主轴转动的同时,在凸轮从动件的约束下做直线往复运动；柱塞上的左配流槽和右配流槽分别与缸体上的吸油窗口、排油窗口发生沟通,容积逐渐变大的腔室吸油,容积逐渐减小的腔室排油。本发明运动灵活速度快,可以实现较高速运动。(The two-dimensional plunger pump based on end surface point contact comprises a pump core assembly and a transmission assembly, wherein the pump core assembly comprises a cylinder body, the cylinder body is arranged in a left shell, and an oil suction hole and an oil discharge hole are formed in a left end cover; 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, and the volumes of the left chamber and the right chamber change along with the reciprocating motion of the plunger; two left distributing grooves and two right distributing grooves with opposite opening directions are uniformly distributed on the outer surface of the plunger at intervals; the transmission assembly comprises a main shaft 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 invention has flexible and fast movement and can realize higher-speed movement.)

1. Two-dimensional plunger pump based on end point contact, its characterized in that: the left end of the right shell is fixedly connected with the right end of the left shell; a left end cover is fixedly arranged at the left end of the left shell; a pump core assembly is arranged in the left shell, and a transmission assembly is arranged in the right shell;

the pump core assembly comprises a cylinder body, the cylinder body is arranged in the left shell, and an oil suction hole and an oil discharge hole are formed in the left end cover; 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, wherein the left end and the right end in the right shell are respectively fixedly provided with the left cam guide rail and the right cam guide rail which are provided with equal-acceleration and equal-deceleration curved surface tracks, 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 a fixed steel ball roller, the fixed steel ball roller is mechanically connected with the left circular disc by adopting straight threads, the outer end of the fixed steel ball roller is contacted 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 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.

2. The two-dimensional plunger pump based on end-surface point contact as recited in claim 1, wherein: the right shell is in a hollow cylinder shape, and is equally divided into two parts along the same radial section, and the two parts are fixedly connected together through bolts.

3. The two-dimensional plunger pump based on end-surface point contact as recited in claim 1, wherein: the left disc and the right disc are fixedly connected through the socket head cap screws.

Technical Field

The invention relates to a plunger pump, in particular to a two-dimensional plunger pump based on end surface point contact.

Background

The traditional axial plunger pump has a complex layout structure, a high manufacturing process requirement and high processing, maintenance and use costs. Constrained by the structure principle, the displacement is not high and the self-priming performance is poor. The moving friction pairs are more, the performance and the service life of the plunger pump are directly influenced, and the plunger pump is not suitable for high-speed and high-load working conditions. Aiming at the defects of the traditional axial plunger pump, a novel plunger pump is designed in demand from the development concept of noise reduction, simplification and efficient manufacturing, the problems are effectively solved, and the development theme of energy conservation and environmental protection in the modern society is met.

Disclosure of Invention

To overcome the above problems, the present invention provides a two-dimensional plunger pump based on end-face point contact.

The technical scheme adopted by the invention is as follows: the two-dimensional plunger pump based on end surface point contact comprises a left end cover, a left shell and a right shell which are sequentially and coaxially arranged along an axial lead, wherein the left end of the right shell is fixedly connected with the right end of the left shell; a left end cover is fixedly arranged at the left end of the left shell; a pump core assembly is arranged in the left shell, and a transmission assembly is arranged in the right shell;

the pump core assembly comprises a cylinder body, the cylinder body is arranged in the left shell, and an oil suction hole and an oil discharge hole are formed in the left end cover; 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, wherein the left end and the right end in the right shell are respectively fixedly provided with the left cam guide rail and the right cam guide rail which are provided with equal-acceleration and equal-deceleration curved surface tracks, 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 a fixed steel ball roller, the fixed steel ball roller is mechanically connected with the left circular disc by adopting straight threads, the outer end of the fixed steel ball roller is contacted with the left cam guide rail, and the other two threaded holes are fixedly connected with the right circular disc by an inner hexagon screw; 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 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.

Furthermore, the right shell is in a hollow cylinder shape, the right shell is equally divided into two parts along the same radial section, and the two parts are fixedly connected together through bolts.

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

The invention has the beneficial effects that: when the contact mode of the cam and the cam follower is point contact, compared with a line contact mode, the flexible and fast motion can be realized, and high-speed motion can be realized. The processing requirement is not too high, the cost is reduced, the structure is simple, the friction degree is reduced, the service life is prolonged, the size is small, and the structure is simple.

Drawings

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

Fig. 2 is a schematic diagram of the transmission assembly and piston.

Fig. 3 is a schematic view of a drive shaft and piston and structure.

Fig. 4 is a sectional view taken along line B-B in fig. 3.

Fig. 5 is a left side view of the left housing.

Fig. 6 is a sectional view taken along line C-C in fig. 5.

Fig. 7 is a schematic view of the structure of the disc assembly.

Fig. 8 is a schematic view of the structure of the disc.

Fig. 9 is a schematic structural view of the left end cap.

Fig. 10 is a schematic view of the present invention with the right housing and right end cap removed.

Fig. 11 is a sectional view taken along the line a-a in fig. 10.

Description of reference numerals: 1. a left housing; 2. a right housing; 3. a plunger; 3-1, a left distributing groove; 3-2, a right flow distribution groove; 4-1, a left cam guide rail; 4-2, right cam guide rail; 5. a main shaft; 6. a disc; 6-1, a fixed steel ball roller; 6-2, inner hexagon screws; 7-1, right chamber; 7-2, left chamber; 7-3 cylinder bodies; 7-4, oil inlet holes; 7-5, oil drain hole; a. c, a left distributing groove; b. d, a right distributing groove.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments, but not all embodiments, of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the orientations or positional relationships indicated as the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., appear based on the orientations or positional relationships shown in the drawings only for the convenience of describing the present invention and simplifying the description, but not for indicating or implying that the referred devices or elements must have a specific orientation, be constructed and operated in a specific orientation, 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 should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" should be interpreted broadly, e.g., as being fixed or detachable 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 meanings 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 two-dimensional plunger pump based on end surface point contact comprises a left end cover, a left shell 1 and a right shell 2 which are sequentially and coaxially arranged along an axial lead, wherein the left shell 1 is in a cylindrical shape with an opening at the left end and a closed right end, the right shell 2 is in a hollow cylindrical shape, the right shell 2 is equally divided into two parts along the same radial section, and the two parts are fixedly connected together through bolts. The left end of the right shell 2 is fixedly connected with the right end of the left shell 1 through a bolt; a left end cover is fixedly arranged at the left end of the left shell 1; the left shell 1 is provided with a pump core assembly, and the right shell 2 is provided with a transmission assembly;

the pump core assembly comprises a cylinder body 7-3, the cylinder body 7-3 is arranged on the left shell 1, and an oil suction hole 7-3 and an oil discharge hole are formed in a left end cover; the outer surface of the cylinder body 7-3 is provided with a first semi-annular groove and a second semi-annular groove, the oil suction hole 7-4 is communicated with the first semi-annular groove, and the oil discharge hole 7-5 is communicated with the second semi-annular groove; a plunger 3 is arranged in the cylinder body 7-3, and the plunger 3 can do linear reciprocating motion along the axial direction of the cylinder body 7-3; the left end of the plunger 3 and the cylinder body 7-3 are enclosed to form a left chamber 7-2, the right end of the plunger 3 and the cylinder body 7-3 are enclosed to form a right chamber 7-1, the volumes of the left chamber 7-2 and the right chamber 7-1 are changed along with the reciprocating motion of the plunger 3, when the plunger 3 axially moves from the leftmost end to the rightmost end, the volume of the left chamber 7-2 is gradually increased, and the volume of the right chamber 7-1 is gradually decreased; conversely, when the plunger 3 axially moves from the rightmost end to the leftmost end, the volume of the right chamber 7-1 gradually increases, and the volume of the left chamber 7-2 gradually decreases;

the outer surface of the plunger 3 is uniformly provided with two left distributing grooves 3-1 and two right distributing grooves 3-2 with opposite opening directions at intervals, the notch positions of the left distributing groove 3-1 and the right distributing groove 3-2 are arranged in a staggered manner, the positions of the cylinder body 7-3 corresponding to the left distributing groove 3-1 and the right distributing groove 3-2 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 5, a left cam guide rail 4-1, a right cam guide rail 4-2 and a cam follower, wherein a left cam guide rail 4-1 and a right cam guide rail 4-2 which are provided with equal-speed reducing curved surface tracks are fixedly arranged at the left end and the right end in the right shell 2 respectively, the phase difference between the left cam guide rail 4-1 and the right cam guide rail 4-2 is 90 degrees, namely the highest point and the lowest point of the left cam guide rail 4-1 correspond to the lowest point and the highest point of the right cam guide rail 4-2 respectively; a cam follower is fixedly connected to the main shaft 5 and positioned between the left cam guide rail and the right cam guide rail, the cam follower comprises a disc 6, the disc comprises a left disc and a right disc, and the left disc and the right disc are in mirror symmetry in structure; 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 a fixed steel ball roller 6-2, the fixed steel ball roller 6-2 is mechanically connected with the left circular disc by straight threads, the outer end of the fixed steel ball roller 6-2 is in contact with a left cam guide rail 4-1, 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 5 and are fixedly connected with each other through inner hexagon screws 6-1, and fixed type steel ball rollers 6-2 on the left disc and the right disc are respectively contacted with a left cam guide rail 4-1 and a right cam guide rail 4-2; a plunger 3 is arranged on the main shaft 5 and positioned in the cylinder body 7-3, and the plunger 3 does linear reciprocating motion under the constraint of the cam follower while rotating along with the main shaft 5; the left distributing groove 3-1 and the right distributing groove 3-2 on the plunger 3 are respectively communicated with an oil absorption window and an oil discharge window on the cylinder body 7-3, a chamber with gradually increased volume absorbs oil, and a chamber with gradually decreased volume discharges oil.

The specific working principle is as follows: the fixed steel ball rollers 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 a transmission shaft of a motor through a spline coupler, and the spline coupler can allow a small amount of axial displacement; when the motor transmits torque to the plunger through the transmission shaft to drive the plunger to rotate circumferentially, a left flow distribution groove and a right flow distribution groove are distributed on the outer surface of the plunger circumferentially, when hydraulic oil enters from the oil inlet and enters the cylinder body through the first semi-annular groove, four left flow distribution grooves and four right flow distribution grooves which are formed on the surface of the plunger and 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 two oil inlet windows, enters the left flow distribution grooves a and c, the volume of a left cavity is increased to absorb oil, when the plunger rotates a certain angle, the oil in the left cavity flows out from the oil outlet through the oil discharge window and the second semi-annular groove, meanwhile, the volume of the right side is gradually increased, the oil enters the right flow distribution, 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 concept and the scope of the present invention should not be considered limited to the specific forms set forth in the embodiments but rather by the equivalents thereof as may occur to those skilled in the art upon consideration of the present inventive concept.