CN-117846913-B - Discrete cylinder body wobble plate type swash plate plunger pump

CN117846913BCN 117846913 BCN117846913 BCN 117846913BCN-117846913-B

Abstract

The invention discloses a discrete cylinder body wobble plate type swash plate plunger pump, which belongs to the technical field of plunger pumps, and adopts a floating disc design, single sliding shoes in the traditional plunger pump are omitted, all plungers are arranged on the floating disc, an oil film generated by a larger matching surface of the floating disc and a swash plate is more stable, an integral sealing belt is adopted, the sliding speed of an inner sealing belt and an outer sealing belt on the swash plate is ensured to be stable, the temperature rise of oil liquid caused by shearing force and pressure difference is consistent, the sliding shoes deflection caused by different oil liquid temperature rises is not caused, the anti-overturning capability is stronger, a central universal joint is adopted for limiting the relative position between two floating pressure plates, and the relative position of two components is not changed while the universal joint can swing, so that the positioning effect can be well achieved. The traditional cylinder bodies are discretized, and each discrete cylinder body can follow along with the swing of the plunger, so that the effect of eliminating the lateral force is achieved.

Inventors

AN GAOCHENG
GUO JIAQI
WANG WENWEI
LIU BAOYU
XU BING

Assignees

太原科技大学
浙江大学

Dates

Publication Date: 20260508
Application Date: 20240119

Claims (6)

1. The utility model provides a discrete cylinder body pendulum disc type swash plate plunger pump which characterized in that, includes swash plate plunger pump actuating mechanism and fixed connection's casing, swash plate plunger pump actuating mechanism includes sloping cam plate, floating disc, movable floating pressure disk and fixed floating pressure disk that arrange in order, the sloping cam plate is connected with the main shaft drive, the sloping cam plate has the slope installation face, the floating disc is installed on the slope installation face, the floating disc with movable floating pressure disk fixed connection, floating disc with fixed floating pressure disk articulates with the bulb of fine plunger and the bulb of discrete cylinder body respectively, the floating disc with set up on the junction surface of movable floating pressure disk with the sealed circular slot of fine plunger's bulb looks adaptation, the floating disc with the slope installation face of sloping cam plate laminating in real time; the fixed floating pressure plate is in a vertical state, and the thin plunger can reciprocate along the axis of the discretization cylinder body; the fixed floating pressure plate is movably connected with the movable floating pressure plate through a central universal joint, and the axis of the central universal joint on the fixed floating pressure plate is positioned on the rotating axis of the main shaft; the inclined plane of the swash plate is provided with all plunger oil ports used for communicating a high-pressure side and a low-pressure side, the circumferential surface of the swash plate is provided with a high-pressure oil groove which is communicated with the oil port on the inclined plane to balance lateral force, and the high-pressure oil groove is perforated to the end face of the swash plate for static pressure support; the shell is internally provided with an installation space, a swash plate plunger pump driving mechanism is arranged in the installation space, and the main shaft and the swash plate are both in rotary connection with the shell; a wear-resistant disc is arranged between the end face of the swash plate and the shell, the wear-resistant disc is connected with the shell through a locating pin, and a sliding shaft sleeve is arranged between the circumferential face of the swash plate and the shell.
2. The discrete cylinder wobble plate swash plate plunger pump of claim 1, wherein the fine plungers are evenly annularly distributed along the centers of the floating plate and the movable floating platen, and the discrete cylinders are evenly annularly distributed along the centers of the distribution end cap and the fixed floating platen.
3. The discrete cylinder wobble plate swash plate plunger pump of claim 1, wherein the discrete cylinder and the fine plunger each comprise a plunger rod and a plunger ball connected, a plunger cavity is formed in the plunger rod of the discrete cylinder, and the plunger rod of the fine plunger is insertable into the plunger cavity for axial movement.
4. The discrete cylinder wobble plate swash plate plunger pump of claim 1, wherein the swash plate bottom plane is provided with an annular hydrostatic support band.
5. The discrete cylinder wobble plate swash plate plunger pump of claim 1, further comprising a flow distribution end cover and a rear end cover, wherein the flow distribution end cover is provided with a vertical mounting surface, a fixed floating pressure plate is coaxially arranged on the vertical mounting surface, the flow distribution end cover and the fixed floating pressure plate are hinged with a ball head of a discrete cylinder, and a sealing circular groove matched with the ball head of the discrete cylinder is formed in a connecting surface of the flow distribution end cover and the fixed floating pressure plate; The flow distribution end cover is provided with a one-way valve and a plug, the one-way valve is arranged at an oil inlet and an oil outlet of the flow distribution end cover, and the plug separates the high-pressure oil cavity from the low-pressure oil cavity.
6. The swash plate plunger pump of claim 5, wherein the swash plate includes a cylindrical section and an inclined section connected to each other, the cylindrical section is coaxially connected to the main shaft by a spline and is axially positioned by a retainer ring, and an outer circle of the cylindrical section is rotatably connected to the housing by a sliding sleeve.

Description

Discrete cylinder body wobble plate type swash plate plunger pump Technical Field The invention relates to the technical field of plunger pumps, in particular to a discrete cylinder body wobble plate type swash plate plunger pump. Background The axial plunger pump is developed towards large discharge capacity, ultrahigh pressure and wide rotating speed range. However, in the existing common plunger pump, under the working condition of ultrahigh pressure and high speed, the specific pressure and specific work of the sliding shoes and the swash plate are increased to cause abrasion of the sliding shoes to cause lubrication failure, and the large-displacement swash plate plunger pump is characterized in that the diameter of a plunger distribution circle is increased, the revolution radius of the sliding shoes is also increased to cause inconsistent internal and external temperature rise of an auxiliary oil film of the sliding shoes to cause deflection of the sliding shoes, and the sliding shoes and the swash plate are directly contacted and worn to be aggravated, so that the performance of the plunger pump is reduced; because the inertia moment of the rotating assembly is increased at high speed, the overturning phenomenon is easy to occur, the common axial plunger pump in the form of a rotary cylinder body or a rotary swash plate is required to balance the moment of the rotating assembly, the design difficulty of a plunger pump body and a cylinder spline is increased, meanwhile, the lateral force born by a plunger is increased, the lateral force is irregular, the sealing of a plunger pair is unstable, the leakage quantity is increased, a stable plunger pair oil film is difficult to stably establish, the lubrication and service life of the plunger are adversely affected, the dynamic pressure effect of the plunger pair oil film and the dynamic pressure effect of a sliding shoe pair oil film are difficult to establish at extremely low rotating speed, the lateral force causes the dry friction condition of the plunger and the cylinder body, the sliding shoe is easy to produce a booter, and the metal peeling phenomenon further affects the cleanliness of oil liquid to the whole plunger pump and even a hydraulic system. Disclosure of Invention The invention provides a discrete cylinder body wobble plate type swash plate plunger pump, which is used for optimally designing irregular lateral force borne by a plunger according to the fact that sliding shoes are easy to wear and lose effectiveness, the moment of inertia of a cylinder body assembly is large and easy to overturn, an integral floating disc is adopted to replace a plurality of sliding shoes, and a discrete cylinder body is in a cylindrical plunger form and is provided with a ball head. The ball head can be hinged with the flow distribution end cover, the upper cylindrical hole of the ball head can be matched with the fine plunger assembly, a swash plate is adopted, and the swash plate is balanced in a dynamic pressure supporting mode, so that the size of the pump is reduced, the novel structural design of the positioning of the central universal joint is realized, and the rotating speed range, the low-speed stability, the working pressure and the power density ratio of the pump are improved. In order to achieve the above purpose, the invention provides a driving mechanism of a swash plate plunger pump, which comprises a swash plate, a floating disc, a movable floating pressure disc and a fixed floating pressure disc which are sequentially arranged, wherein the swash plate is in driving connection with a main shaft, the swash plate is provided with an inclined mounting surface, the floating disc is mounted on the inclined mounting surface and is fixedly connected with the movable floating pressure disc, the floating disc and the movable floating pressure disc are respectively hinged with a ball head of a fine plunger and a ball head of a discretized cylinder body, a sealing circular groove matched with the ball head of the fine plunger is formed in the connecting surface of the floating disc and the movable floating pressure disc, and the movable floating pressure disc is in real-time fit with the inclined mounting surface of the swash plate; The fixed floating pressure plate is in a vertical state, the fixed floating pressure plate is hinged with the discrete cylinder body, and the thin plunger can reciprocate along the axis of the thick plunger; The fixed floating pressure plate is movably connected with the movable floating pressure plate through a central universal joint, and the axis of the central universal joint on the fixed floating pressure plate is positioned on the rotating axis of the main shaft. Preferably, a high-pressure oil groove is provided on the circumferential surface of the swash plate. Preferably, the fine plungers are uniformly distributed in a ring shape along the centers of the floating disc and the movable floating disc, and the disc