WO2024000832A1

WO2024000832A1 - Plunger pump

Info

Publication number: WO2024000832A1
Application number: PCT/CN2022/119669
Authority: WO
Inventors: 刘昊; 韦文术; 耿翔宇; 李然; 李东泽; 于天亮; 叶健; 陈荣明
Original assignee: 北京天玛智控科技股份有限公司; 北京煤科天玛自动化科技有限公司
Priority date: 2022-07-01
Filing date: 2022-09-19
Publication date: 2024-01-04
Also published as: CN115045817A

Abstract

Provided in the present disclosure is a plunger pump. The plunger pump comprises a pump body, a crankshaft, and a plunger group, wherein the pump body is provided with a plurality of working cavities; the crankshaft is rotatably assembled on the pump body, the crankshaft is provided with an eccentric section, and the axis of the eccentric section and the axis of the crankshaft are arranged in parallel at an interval; and the plunger group comprises a plurality of plungers and star wheels, the plurality of plungers being arranged at intervals in a circumferential direction of the star wheels, one end of each plunger being connected to a star wheel, the other ends of the plungers being guided and assembled in the working cavities so as to adjust the volume of the working cavities, and the star wheels being rotatably assembled on the eccentric section so as to drive the plungers to slide in the working cavities when the crankshaft rotates.

Description

柱塞泵plunger pump

相关申请的交叉引用Cross-references to related applications

本申请基于申请号为202210770032.4、申请日为2022年07月01日的中国专利申请提出，并要求该中国专利申请的优先权，该中国专利申请的全部内容在此引入本申请作为参考。This application is filed based on a Chinese patent application with application number 202210770032.4 and a filing date of July 1, 2022, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby incorporated into this application as a reference.

技术领域Technical field

本公开涉及液体泵技术领域，具体地，涉及一种柱塞泵。The present disclosure relates to the technical field of liquid pumps, and in particular, to a plunger pump.

背景技术Background technique

柱塞泵依靠柱塞在缸体中往复运动，使密封工作容腔的容积发生变化来实现吸油、压油。径向柱塞泵是一种活塞或柱塞的往复运动方向与驱动轴垂直的柱塞泵，径向柱塞泵噪声低、工作压力高，然而额定流量较低。The plunger pump relies on the reciprocating movement of the plunger in the cylinder to change the volume of the sealed working chamber to achieve oil suction and oil pressure. Radial piston pump is a piston pump in which the reciprocating direction of the piston or plunger is perpendicular to the drive shaft. The radial piston pump has low noise and high working pressure, but its rated flow rate is low.

发明内容Contents of the invention

本公开旨在至少在一定程度上解决相关技术中的技术问题之一。为此，本公开的实施例提出一种柱塞泵，具有高的额定流量。The present disclosure aims to solve one of the technical problems in the related art, at least to a certain extent. To this end, embodiments of the present disclosure propose a plunger pump with a high rated flow rate.

本公开实施例的柱塞泵包括泵体，所述泵体设有多个工作容腔；曲轴，所述曲轴可转动地装配于所述泵体，所述曲轴设有偏心段，所述偏心段的轴线与所述曲轴的轴线平行间隔布置；柱塞组，所述柱塞组包括多个柱塞和星轮，多个所述柱塞沿所述星轮的周向间隔布置，所述柱塞的一端与所述星轮相连，所述柱塞的另一端导向装配于所述工作容腔以适于调整所述工作容腔的容积，所述星轮可转动地装配于所述偏心段，以适于在所述曲轴转动时驱动所述柱塞在所述工作容腔内滑移。The plunger pump in the embodiment of the present disclosure includes a pump body, the pump body is provided with a plurality of working chambers; a crankshaft, the crankshaft is rotatably assembled to the pump body, the crankshaft is provided with an eccentric section, and the eccentric The axis of the segment is spaced parallel to the axis of the crankshaft; a plunger group, the plunger group includes a plurality of plungers and a star wheel, and the plurality of plungers are spaced apart along the circumferential direction of the star wheel, and the One end of the plunger is connected to the star wheel, and the other end of the plunger is guided and assembled in the working chamber to be suitable for adjusting the volume of the working chamber. The star wheel is rotatably assembled in the eccentric section, adapted to drive the plunger to slide within the working chamber when the crankshaft rotates.

本公开实施例的柱塞泵具有较大的额定流量。The plunger pump of the embodiment of the present disclosure has a larger rated flow rate.

在一些实施例中，所述泵体内设有装配空间，所述工作容腔与所述装配空间连通，所述工作容腔的内径的公称尺寸与所述柱塞的外径的公称尺寸相同。In some embodiments, the pump body is provided with an assembly space, the working chamber is connected to the assembly space, and the nominal size of the inner diameter of the working chamber is the same as the nominal size of the outer diameter of the plunger.

在一些实施例中，所述曲轴包括轴芯，所述曲轴的所述轴芯沿前后方向延伸，所述曲轴的轴芯转动配合于所述装配空间内，所述偏心段设于所述轴芯的外周侧，所述偏心段的延伸方向与所述曲轴的延伸方向相同，所述偏心段的半径大于所述曲轴轴芯的半径，所述偏心段的轴线与所述曲轴的轴线的间距为所述偏心段的偏心距，所述偏心段偏心距小于所述轴芯的半径。In some embodiments, the crankshaft includes an axis core, the axis core of the crankshaft extends in the front and rear direction, the axis core of the crankshaft is rotationally fitted in the assembly space, and the eccentric section is provided on the shaft. On the outer peripheral side of the core, the extension direction of the eccentric section is the same as the extension direction of the crankshaft, the radius of the eccentric section is greater than the radius of the crankshaft core, and the distance between the axis of the eccentric section and the axis of the crankshaft is is the eccentricity of the eccentric segment, and the eccentricity of the eccentric segment is smaller than the radius of the axis core.

在一些实施例中，多个所述柱塞组沿前后方向平行间隔布置，所述星轮为环形结构，所述星轮沿前后方向延伸，所述星轮转动装配于所述偏心段的外周侧，且所述星轮相对于所述偏心段可转动，所述柱塞位于所述星轮的外周侧，所述柱塞沿着所述曲轴的周向间隔布置，且任意相邻的两个所述曲轴的间距相同。In some embodiments, a plurality of the plunger groups are arranged in parallel and spaced apart along the front-to-back direction, the star wheel is an annular structure, the star wheel extends along the front-to-back direction, and the star wheel is rotatably assembled on the outer periphery of the eccentric section. side, and the star wheel is rotatable relative to the eccentric section, the plungers are located on the outer peripheral side of the star wheel, the plungers are arranged at intervals along the circumference of the crankshaft, and any two adjacent ones The distance between the crankshafts is the same.

在一些实施例中，所述柱塞组有多个，所述偏心段有多个，多个所述偏心段与多个所述柱塞组一一对应，多个偏心段沿着所述曲轴的长度方向间隔布置，相邻的两个所述偏心段之间具有设定偏转角度。In some embodiments, there are multiple plunger groups and multiple eccentric segments. Multiple eccentric segments correspond to multiple plunger groups. Multiple eccentric segments are arranged along the crankshaft. are arranged at intervals in the length direction, and there is a set deflection angle between two adjacent eccentric sections.

在一些实施例中，多个所述偏心段沿着前后方向间隔布置，多个所述偏心段的偏心距和半径相同，多个所述偏心段包括第一段和第二段，所述第一段的轴线在前后方向上的投影和所述曲轴的轴线在前后方向的投影的连线和所述第二段的轴线在前后方向上的投影和所述曲轴的轴线在前后方向的投影的连线具有夹角，所述第一段和所述第二段之间具有设定偏转角度。In some embodiments, a plurality of the eccentric segments are arranged at intervals along the front-to-back direction, the eccentric distances and radii of the plurality of eccentric segments are the same, and the plurality of eccentric segments include a first segment and a second segment, and the third eccentric segment The line connecting the projection of the axis of one section in the front-to-back direction and the projection of the axis of the crankshaft in the front-to-back direction and the projection of the axis of the second section in the front-to-back direction and the projection of the axis of the crankshaft in the front-to-back direction The connecting line has an included angle, and there is a set deflection angle between the first section and the second section.

在一些实施例中，所述曲轴包括轴环，所述轴环设于相邻的两个所述偏心段之间，所述轴环与所述曲轴同轴延伸，所述轴环的半径尺寸大于所述偏心段的半径尺寸与所述偏心段的偏心距的和。In some embodiments, the crankshaft includes a collar, the collar is disposed between two adjacent eccentric sections, the collar extends coaxially with the crankshaft, and the radius size of the collar It is greater than the sum of the radius size of the eccentric segment and the eccentricity of the eccentric segment.

在一些实施例中，所述轴环设于所述第一段和所述第二段之间，所述轴环设于所述曲轴的轴芯的外周侧，所述轴环与所述曲轴的轴芯同轴延伸，所述轴环外圈的半径大于所述偏心段的半径和偏心距的和，所述偏心段在前后方向的投影完全落入所述轴环在前后方向的投影内。In some embodiments, the collar is provided between the first section and the second section, the collar is provided on the outer peripheral side of the axis core of the crankshaft, and the collar is connected to the crankshaft. The axis core extends coaxially, the radius of the outer ring of the collar is greater than the sum of the radius and the eccentricity of the eccentric segment, and the projection of the eccentric segment in the front-rear direction completely falls within the projection of the collar in the front-rear direction. .

在一些实施例中，所述柱塞泵包括驱动器，所述曲轴的端部伸出所述泵体并形成外延段，所述驱动器适于与所述外延段相连以驱动所述曲轴转动。In some embodiments, the plunger pump includes a driver, an end of the crankshaft extends out of the pump body and forms an extension section, and the driver is adapted to be connected with the extension section to drive the crankshaft to rotate.

在一些实施例中，所述星轮与所述偏心段同轴延伸，所述星轮内设有第一孔和多个第二孔，多个所述第二孔沿所述第一孔的外周侧间隔布置，所述第一孔和所述第二孔沿所述星轮的轴向延伸，所述偏心段可转动地装配于所述第一孔内，多个所述第二孔与所述柱塞一一对应以供多个所述柱塞与所述星轮相连。In some embodiments, the star wheel extends coaxially with the eccentric section, the star wheel is provided with a first hole and a plurality of second holes, and the plurality of second holes are along the edges of the first hole. The first hole and the second hole extend along the axial direction of the star wheel. The eccentric section is rotatably assembled in the first hole. A plurality of the second holes are connected with the first hole. The plungers are in one-to-one correspondence so that multiple plungers are connected to the star wheel.

在一些实施例中，所述星轮的轴线与所述偏心段的轴线重合，所述星轮的内圈与所述偏心段的外圈可转动的相连，所述星轮的内圈形成所述第一孔，所述第一孔为通孔，所述第一孔的内壁和所述偏心段的外圈之间设有轴承。In some embodiments, the axis of the star wheel coincides with the axis of the eccentric section, the inner ring of the star wheel is rotatably connected to the outer ring of the eccentric section, and the inner ring of the star wheel forms the The first hole is a through hole, and a bearing is provided between the inner wall of the first hole and the outer ring of the eccentric section.

在一些实施例中，所述第二孔的延伸方向与所述星轮的轴向相同，且所述第二孔为贯穿所述星轮前后两端的通孔，所述柱塞通过与其对应的所述第二孔与所述星轮相连，且所述柱塞被配置为沿着与其对应的所述第二孔的轴线摆动。In some embodiments, the extension direction of the second hole is the same as the axial direction of the star wheel, and the second hole is a through hole penetrating both front and rear ends of the star wheel, and the plunger passes through the corresponding The second hole is connected to the star wheel, and the plunger is configured to swing along an axis corresponding to the second hole.

在一些实施例中，所述柱塞组包括多个活塞部和多个连杆，所述连杆的一端装配于所述第二孔，所述连杆的另一端与所述活塞部可转动地相连，所述柱塞设于所述活塞部背离所述连杆的一端，所述活塞部可滑动地装配于所述泵体。In some embodiments, the plunger assembly includes a plurality of piston parts and a plurality of connecting rods, one end of the connecting rod is assembled to the second hole, and the other end of the connecting rod is rotatable with the piston part. The plunger is disposed on an end of the piston part away from the connecting rod, and the piston part is slidably assembled on the pump body.

在一些实施例中，多个所述活塞部与多个所述柱塞一一对应，多个所述连杆与多个得到柱塞一一对应，所述柱塞的一端配合于所述工作容腔，所述柱塞的另一端和与其对应的所述活塞部相连，所述活塞部的延伸方向与所述连杆的延伸方向相同。In some embodiments, a plurality of piston parts correspond to a plurality of plungers, a plurality of connecting rods correspond to a plurality of plungers, and one end of the plunger cooperates with the working The other end of the plunger is connected to the corresponding piston part of the cavity, and the extension direction of the piston part is the same as the extension direction of the connecting rod.

在一些实施例中，所述泵体设有活塞腔，所述活塞腔设于所述工作容腔靠近所述装配空间的一侧，所述活塞腔与所述工作容腔一一对应，且所述活塞腔和与之对应的所述工作容腔同轴延伸。In some embodiments, the pump body is provided with a piston chamber, the piston chamber is located on a side of the working chamber close to the assembly space, the piston chamber corresponds to the working chamber one by one, and The piston chamber and the corresponding working chamber extend coaxially.

在一些实施例中，所述泵体包括多个套筒组，多个所述套筒组与所述柱塞组一一对应，所述套筒组中包括多个沿所述曲轴的周向间隔布置的套筒，套筒沿着所述曲轴的径向延伸，所述活塞部和所述套筒一一对应，且所述活塞部导向装配于所述套筒内。In some embodiments, the pump body includes a plurality of sleeve groups, the plurality of sleeve groups correspond to the plunger group one-to-one, and the sleeve group includes a plurality of sleeve groups along the circumferential direction of the crankshaft. Sleeves are arranged at intervals, and the sleeves extend along the radial direction of the crankshaft. The piston parts correspond to the sleeves one by one, and the piston parts are guided and assembled in the sleeves.

在一些实施例中，多个所述连杆包括主连杆和多个副连杆，所述主连杆的一端与所述星轮固定相连，所述主连杆的另一端与所述活塞部可转动地相连，所述副连杆的一端可转动地装配于所述第二孔，所述副连杆的另一端与所述活塞部可转动地相连。In some embodiments, the multiple connecting rods include a main connecting rod and a plurality of auxiliary connecting rods. One end of the main connecting rod is fixedly connected to the star wheel, and the other end of the main connecting rod is connected to the piston. The second end of the auxiliary connecting rod is rotatably connected to the second hole, and the other end of the auxiliary connecting rod is rotatably connected to the piston part.

在一些实施例中，多个所述柱塞组的主连杆的延伸方向具有夹角。In some embodiments, the extending directions of the main connecting rods of multiple plunger groups have included angles.

在一些实施例中，所述泵体包括多个外壳，多个所述外壳沿所述曲轴的轴向平行间隔布置，所述柱塞组配合于所述外壳，且多个所述外壳与多个所述柱塞组一一对应。In some embodiments, the pump body includes a plurality of housings, the plurality of housings are arranged at parallel intervals along the axial direction of the crankshaft, the plunger group is matched with the housings, and the plurality of housings are connected to multiple housings. The plunger groups correspond one to one.

在一些实施例中，所述外壳为环形，所述外壳沿所述曲轴的周向闭合延伸，所述外壳内设有通孔，所述通孔沿所述曲轴的延伸方向贯穿所述外壳，所述曲轴转动配合于所述通孔内，多个所述外壳的通孔沿所述曲轴的轴向排列形成所述装配空间，与所述外壳对应的所述柱塞组的所述星轮配合在所述曲轴与所述外壳之间。In some embodiments, the housing is annular, the housing is closed and extends along the circumference of the crankshaft, and a through hole is provided in the housing, and the through hole penetrates the housing along the extension direction of the crankshaft, The crankshaft is rotatably fitted in the through hole, a plurality of through holes of the housing are arranged along the axial direction of the crankshaft to form the assembly space, and the star wheel of the plunger group corresponding to the housing Fitted between the crankshaft and the housing.

在一些实施例中，所述外壳的外周侧设有多个阀体，多个所述阀体与多个所述工作容腔一一对应，所述工作容腔设于所述阀体内，所述套筒设于所述工作容腔和所述曲轴之间，与所述外壳对应的所述柱塞组的所述活塞部配合于所述套筒内，与所述外壳对应的所述柱塞组的所述柱塞配合于所述工作容腔内。In some embodiments, a plurality of valve bodies are provided on the outer peripheral side of the housing, and the plurality of valve bodies correspond to a plurality of the working chambers, and the working chambers are provided in the valve body, so The sleeve is provided between the working chamber and the crankshaft, the piston portion of the plunger group corresponding to the housing is fitted in the sleeve, and the column corresponding to the housing is The plunger of the plug assembly is fitted in the working chamber.

附图说明Description of drawings

图1是本公开实施例的柱塞泵的剖视示意图。Figure 1 is a schematic cross-sectional view of a plunger pump according to an embodiment of the present disclosure.

图2是本公开实施例的柱塞泵的柱塞组的示意图。Figure 2 is a schematic diagram of a plunger group of a plunger pump according to an embodiment of the present disclosure.

图3是本公开实施例的柱塞泵的星轮的示意图。Figure 3 is a schematic diagram of a star wheel of a plunger pump according to an embodiment of the present disclosure.

图4是本公开实施例的柱塞泵的曲轴的示意图。4 is a schematic diagram of a crankshaft of a plunger pump according to an embodiment of the present disclosure.

图5是本公开实施例的柱塞泵的示意图。Figure 5 is a schematic diagram of a plunger pump according to an embodiment of the present disclosure.

附图标记：Reference signs:

泵体1；工作容腔11；装配空间12；套筒13；外壳14；阀体141； Pump body 1; working chamber 11; assembly space 12; sleeve 13; shell 14; valve body 141;

曲轴2；偏心段21；第一段211；第二段212；轴环22；外延段23； Crankshaft 2; eccentric section 21; first section 211; second section 212; collar 22; extension section 23;

柱塞组3；第一柱塞组301；第二柱塞组302；柱塞31；星轮32；连杆33；主连杆331；副连杆332；活塞部34。Plunger group 3; first plunger group 301; second plunger group 302; plunger 31; star wheel 32; connecting rod 33; main connecting rod 331; auxiliary connecting rod 332; piston part 34.

具体实施方式Detailed ways

下面详细描述本公开的实施例，所述实施例的示例在附图中示出。下面通过参考附图描述的实施例是示例性的，旨在用于解释本公开，而不能理解为对本公开的限制。The embodiments of the present disclosure are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are exemplary and intended to explain the present disclosure, but are not to be construed as limitations of the present disclosure.

下面结合图1至图5描述本公开实施例的柱塞泵。The plunger pump according to the embodiment of the present disclosure will be described below with reference to FIGS. 1 to 5 .

本公开实施例的柱塞泵包括泵体1、曲轴2和多个柱塞组3。The plunger pump in the embodiment of the present disclosure includes a pump body 1, a crankshaft 2 and a plurality of plunger groups 3.

泵体1设有多个工作容腔11。具体地，泵体1内设有装配空间12，工作容腔11与装配空间12连通，工作容腔11的内径的公称尺寸与柱塞31的外径的公称尺寸相同，使柱塞31可以与工作容腔11过渡配合，从而使柱塞31和工作容腔11密封配合。The pump body 1 is provided with a plurality of working chambers 11 . Specifically, the pump body 1 is provided with an assembly space 12, and the working chamber 11 is connected with the assembly space 12. The nominal size of the inner diameter of the working chamber 11 is the same as the nominal size of the outer diameter of the plunger 31, so that the plunger 31 can be The working chamber 11 is transitionally fitted, so that the plunger 31 and the working chamber 11 are sealed and matched.

曲轴2可转动地装配于泵体1，曲轴2设有偏心段21，偏心段21的轴线与曲轴2的轴线平行间隔布置。具体地，曲轴2包括轴芯，曲轴2的轴芯沿前后方向延伸，曲轴2的轴芯转动配合于装配空间12内，偏心段21设于轴芯的外周侧，偏心段21的延伸方向与曲轴2的延伸方向相同，偏心段21的半径大于曲轴2轴芯的半径，偏心段21的轴线与曲轴2的轴线的间距为偏心段21的偏心距，偏心段21的偏心距小于轴芯的半径。The crankshaft 2 is rotatably assembled to the pump body 1. The crankshaft 2 is provided with an eccentric section 21. The axis of the eccentric section 21 is arranged parallel to the axis of the crankshaft 2 at intervals. Specifically, the crankshaft 2 includes a shaft core. The shaft core of the crankshaft 2 extends in the front-rear direction. The shaft core of the crankshaft 2 rotates and fits in the assembly space 12. The eccentric section 21 is provided on the outer peripheral side of the shaft core. The extension direction of the eccentric section 21 is in line with that of the shaft core. The extension direction of the crankshaft 2 is the same. The radius of the eccentric section 21 is greater than the radius of the axis of the crankshaft 2. The distance between the axis of the eccentric section 21 and the axis of the crankshaft 2 is the eccentricity of the eccentric section 21. The eccentricity of the eccentric section 21 is smaller than the eccentricity of the axis of the crankshaft 2. radius.

多个柱塞组3沿着曲轴2的长度方向间隔设于偏心段21，柱塞组3包括多个柱塞31和星轮32，多个柱塞31沿着星轮32的周向间隔布置，柱塞31的一端与星轮32相连，柱塞31导向装配于工作容腔11以适于调整工作容腔11的容积，偏心段21转动装配于星轮32，以适于在曲轴2转动时驱动柱塞31在工作容腔11内滑移。A plurality of plunger groups 3 are spaced apart from the eccentric section 21 along the length direction of the crankshaft 2. The plunger group 3 includes a plurality of plungers 31 and a star wheel 32. The plurality of plungers 31 are spaced apart along the circumferential direction of the star wheel 32. , one end of the plunger 31 is connected to the star wheel 32, the plunger 31 is guided and assembled to the working chamber 11 to be suitable for adjusting the volume of the working chamber 11, and the eccentric section 21 is rotatably assembled to the star wheel 32 to be suitable for rotating on the crankshaft 2 When the plunger 31 is driven to slide in the working chamber 11.

具体地，多个柱塞组3沿前后方向平行间隔布置，每个柱塞组3包括多个柱塞31和一个星轮32，星轮32为环形结构，星轮32沿前后方向延伸，星轮32转动装配于偏心段21的外周侧，且星轮32相对于偏心段21可转动，柱塞31位于星轮32的外周侧，柱塞31沿着曲轴2的周向间隔布置，且任意相邻的两个曲轴2的间距相同。Specifically, multiple plunger groups 3 are arranged in parallel and spaced apart along the front-to-back direction. Each plunger group 3 includes multiple plungers 31 and a star wheel 32. The star wheel 32 is an annular structure. The star wheel 32 extends along the front-to-back direction. The star wheel 32 extends along the front-to-back direction. The wheel 32 is rotatably assembled on the outer circumferential side of the eccentric section 21, and the star wheel 32 is rotatable relative to the eccentric section 21. The plunger 31 is located on the outer circumferential side of the star wheel 32, and the plungers 31 are arranged at intervals along the circumferential direction of the crankshaft 2, and can be arbitrarily arranged. The distance between two adjacent crankshafts 2 is the same.

本公开实施例的柱塞泵，在曲轴2上设置多个柱塞组3，每个柱塞组3中设置有多个柱塞31，多个柱塞31与泵体1的工作容腔11配合，当曲轴2转动时，星轮32随着偏心轴做偏心转动运动，驱动柱塞31在工作容腔11内导向滑动，使多个工作容腔11的容积随着曲轴2的转动周期性变化，从而使油液依次被吸入多个工作容腔11后排出，多个柱塞31配合运动，从而增大了本公开实施例的柱塞泵的额定流量，使本公开实施例的柱塞泵具有较大的额定流量。The plunger pump according to the embodiment of the present disclosure is provided with multiple plunger groups 3 on the crankshaft 2. Each plunger group 3 is provided with multiple plungers 31. The multiple plungers 31 are connected to the working chamber 11 of the pump body 1. When the crankshaft 2 rotates, the star wheel 32 makes an eccentric rotational movement with the eccentric shaft, and the driving plunger 31 guides and slides in the working chamber 11, so that the volumes of the multiple working chambers 11 rotate periodically with the rotation of the crankshaft 2. changes, so that the oil is sequentially sucked into multiple working chambers 11 and then discharged, and the multiple plungers 31 move together, thereby increasing the rated flow rate of the plunger pump according to the disclosed embodiment, making the plunger according to the disclosed embodiment The pump has a larger rated flow rate.

在一些实施例中，偏心段21有多个，多个偏心段21与多个柱塞组3一一对应，多个偏心段21沿着曲轴2的长度方向间隔布置，相邻的两个偏心段21之间具有设定偏转角度。In some embodiments, there are multiple eccentric segments 21 , and the multiple eccentric segments 21 correspond to the multiple plunger groups 3 one-to-one. The multiple eccentric segments 21 are spaced apart along the length direction of the crankshaft 2 , and two adjacent eccentric segments 21 are spaced apart along the length direction of the crankshaft 2 . There is a set deflection angle between the segments 21.

具体地，多个偏心段21沿着前后方向间隔布置，多个偏心段21的偏心距和半径都相同，多个偏心段21包括第一段211和第二段212，第一段211的轴线在前后方向上的投影和曲轴2的轴线在前后方向的投影的连线和第二段的轴线在前后方向上的投影和曲轴2的轴线在前后方向的投影的连线具有夹角，从而使第一段211和第二段212之间具有设定偏转角度。Specifically, the plurality of eccentric segments 21 are spaced apart along the front-to-back direction. The eccentric distances and radii of the multiple eccentric segments 21 are the same. The multiple eccentric segments 21 include a first segment 211 and a second segment 212. The axis of the first segment 211 The line connecting the projection of the axis of the crankshaft 2 in the front and rear direction and the line connecting the projection of the axis of the second segment in the front and rear direction and the projection of the axis of the crankshaft 2 in the front and rear direction have an included angle, so that There is a set deflection angle between the first section 211 and the second section 212.

由此，通过设置多个偏心段21，且多个偏心段21与多个柱塞组3一一对应，使曲轴2在转动时保持动平衡，减小了本公开实施例的柱塞泵在工作时的振动幅度，降低了本公开实施例的柱塞泵在工作时的噪音。Therefore, by arranging multiple eccentric sections 21 , and the multiple eccentric sections 21 correspond to the multiple plunger groups 3 one-to-one, the crankshaft 2 maintains dynamic balance when rotating, thereby reducing the problem of the plunger pump according to the embodiment of the present disclosure. The vibration amplitude during operation reduces the noise of the plunger pump according to the embodiment of the present disclosure during operation.

在一些实施例中，曲轴2包括轴环22，轴环22设于相邻的两个偏心段21之间，轴环22与曲轴2同轴延伸，轴环22的半径尺寸大于偏心段21的半径尺寸与偏心段21的偏心距的和。In some embodiments, the crankshaft 2 includes a collar 22 , which is disposed between two adjacent eccentric sections 21 . The collar 22 extends coaxially with the crankshaft 2 . The radius of the collar 22 is larger than that of the eccentric section 21 . The sum of the radius size and the eccentricity of the eccentric segment 21.

具体地，多个轴环22设于第一段211和第二段212之间，轴环22设于曲轴2的轴芯的外周侧，轴环22与曲轴2的轴芯同轴延伸，轴环22外圈的半径大于偏心段21的半径和偏心距的和，使偏心段21在前后方向的投影完全落入轴环22在前后方向的投影内。Specifically, a plurality of collars 22 are provided between the first section 211 and the second section 212. The collars 22 are provided on the outer peripheral side of the axis of the crankshaft 2. The collars 22 extend coaxially with the axis of the crankshaft 2. The radius of the outer ring of the ring 22 is greater than the sum of the radius and the eccentricity of the eccentric segment 21, so that the projection of the eccentric segment 21 in the front-rear direction completely falls within the projection of the collar 22 in the front-rear direction.

由此，一方面轴环22设于第一段211和第二段212之间，可以防止在本公开实施例的柱塞泵工作时，与第一段211相对应的柱塞组3和与第二段212相对应的柱塞组3互相干涉，另一方面在把柱塞组3安装于偏心段21时，柱塞组3抵靠在轴环22的前端面或后端面，从而便于柱塞组3沿前后方向定位。Therefore, on the one hand, the collar 22 is provided between the first section 211 and the second section 212, which can prevent the plunger group 3 corresponding to the first section 211 and the plunger group 3 corresponding to the first section 211 when the plunger pump of the embodiment of the present disclosure is operating. The plunger groups 3 corresponding to the second section 212 interfere with each other. On the other hand, when the plunger group 3 is installed on the eccentric section 21, the plunger group 3 abuts the front or rear end surface of the collar 22, thereby facilitating the The plug group 3 is positioned in the front-to-back direction.

在一些实施例中，柱塞泵包括驱动器，曲轴2的端部伸出泵体1并形成外延段23，驱动器适于与外延段23相连以驱动曲轴2转动。In some embodiments, the plunger pump includes a driver. The end of the crankshaft 2 extends out of the pump body 1 and forms an extension section 23 . The driver is adapted to be connected with the extension section 23 to drive the crankshaft 2 to rotate.

具体地，驱动器为电机，曲轴2的前端伸出泵体1形成外延段23，外延段23的外周设有花键，外延段23与电机的输出轴通过花键配合。Specifically, the driver is a motor, and the front end of the crankshaft 2 extends out of the pump body 1 to form an extension section 23. The extension section 23 is provided with splines on its outer periphery, and the extension section 23 cooperates with the output shaft of the motor through splines.

由此，驱动器与外延段23相连以驱动曲轴2转动，由于曲轴2上设有多个偏心段21、可以安装多个柱塞组3，从而使驱动器在驱动曲轴2转动时，可以同时驱动多个柱塞组3的多个柱塞31在与之对应的工作容腔11内导向移动，可以同时改变多个工作容腔11的容积，从而提高了本公开实施例的柱塞泵的额定流量。Therefore, the driver is connected to the extension section 23 to drive the crankshaft 2 to rotate. Since the crankshaft 2 is provided with multiple eccentric sections 21, multiple plunger groups 3 can be installed, so that when the driver drives the crankshaft 2 to rotate, it can drive multiple plungers at the same time. The multiple plungers 31 of each plunger group 3 are guided and moved in the corresponding working chambers 11, and the volumes of the multiple working chambers 11 can be changed simultaneously, thereby increasing the rated flow rate of the plunger pump according to the embodiment of the present disclosure. .

在一些实施例中，星轮32与偏心段21同轴延伸，星轮32内设有第一孔和多个第二孔，多个第二孔沿第一孔的外周侧间隔布置，第一孔和第二孔沿星轮32的轴向延伸，偏心段21可转动地装配于第一孔内，多个第二孔与柱塞31一一对应以供多个柱塞31与星轮32相连。In some embodiments, the star wheel 32 extends coaxially with the eccentric section 21 . A first hole and a plurality of second holes are provided in the star wheel 32 . The plurality of second holes are spaced apart along the outer circumferential side of the first hole. The hole and the second hole extend along the axial direction of the star wheel 32, the eccentric section 21 is rotatably assembled in the first hole, and the plurality of second holes correspond to the plunger 31 one-to-one to accommodate the plurality of plungers 31 and the star wheel 32. connected.

具体地，星轮32的轴线与其对应的偏心段21的轴线重合，星轮32的内圈与偏心段21的外圈可转动的相连，星轮32的内圈形成第一孔，第一孔为通孔，第一孔的内壁和偏心段21的外圈之间设有轴承，从而减少星轮32与偏心段21之间的摩擦作用。Specifically, the axis of the star wheel 32 coincides with the axis of its corresponding eccentric section 21, the inner ring of the star wheel 32 is rotatably connected to the outer ring of the eccentric section 21, and the inner ring of the star wheel 32 forms a first hole. It is a through hole, and a bearing is provided between the inner wall of the first hole and the outer ring of the eccentric section 21, thereby reducing the friction between the star wheel 32 and the eccentric section 21.

多个第二孔沿第一孔的外周侧均匀间隔布置，第二孔的延伸方向与星轮32的轴向相同，且第二孔为贯穿星轮32前后两端的通孔，柱塞31通过与之对应的第二孔与星轮32相连，且柱塞31可沿着与之对应的第二孔的轴线摆动。A plurality of second holes are evenly spaced along the outer circumferential side of the first hole. The extension direction of the second holes is the same as the axial direction of the star wheel 32. The second holes are through holes that penetrate the front and rear ends of the star wheel 32, and the plunger 31 passes through them. The corresponding second hole is connected to the star wheel 32, and the plunger 31 can swing along the axis of the corresponding second hole.

由此，偏心段21可转动地装配于第一孔，偏心段21的外周侧与第一孔的内壁面接触，增加了曲轴2与星轮32的接触面积，在减小曲轴2与星轮32之间的摩擦作用的同时提高了本公开实施例的柱塞泵工作时的稳定性。Therefore, the eccentric section 21 is rotatably assembled in the first hole, and the outer peripheral side of the eccentric section 21 contacts the inner wall surface of the first hole, which increases the contact area between the crankshaft 2 and the star wheel 32, and reduces the contact area between the crankshaft 2 and the star wheel 32. The friction between the pumps 32 also improves the stability of the plunger pump in the embodiment of the present disclosure during operation.

在一些实施例中，柱塞组3包括多个活塞部34和多个连杆33，连杆33的一端装配于第二孔，连杆33的另一端与活塞部34可转动地相连，柱塞31设于活塞部34背离连杆33的一端，活塞部34可滑动地装配于泵体1。In some embodiments, the plunger group 3 includes a plurality of piston parts 34 and a plurality of connecting rods 33. One end of the connecting rod 33 is assembled in the second hole, and the other end of the connecting rod 33 is rotatably connected to the piston part 34. The column The plug 31 is provided at an end of the piston part 34 away from the connecting rod 33 , and the piston part 34 is slidably assembled to the pump body 1 .

具体地，多个活塞部34与多个柱塞31一一对应，多个连杆33与多个柱塞31一一对应，柱塞31的一端配合于工作容腔11，柱塞31的另一端和与之对应的活塞部34相连，活塞部34的延伸方向与连杆33的延伸方向相同，泵体1设有活塞腔，活塞腔设于工作容腔11靠近装配空间12的一侧，活塞腔与工作容腔11一一对应，且活塞腔和与之对应的工作容腔11同轴延伸。Specifically, the plurality of piston parts 34 correspond to the plurality of plungers 31 one-to-one, and the plurality of connecting rods 33 correspond to the plurality of plungers 31 one by one. One end of the plunger 31 is matched with the working chamber 11, and the other end of the plunger 31 is matched with the working chamber 11. One end is connected to the corresponding piston part 34. The extension direction of the piston part 34 is the same as the extension direction of the connecting rod 33. The pump body 1 is provided with a piston chamber, and the piston chamber is located on the side of the working chamber 11 close to the assembly space 12. The piston chamber corresponds to the working chamber 11 one-to-one, and the piston chamber and the corresponding working chamber 11 extend coaxially.

由此，活塞部34与柱塞31同轴延伸，且活塞部导向配合于活塞腔，一方面提高柱塞31在工作容腔11内移动的导向性，另一方面活塞部的直径大于柱塞31，活塞部和柱塞31组合体在收到径向力时，由活塞部承载径向力，提高了柱塞31配合于工作容腔11的配合精度。Therefore, the piston part 34 and the plunger 31 extend coaxially, and the piston part is guided and matched with the piston cavity. On the one hand, the guideability of the plunger 31 in moving in the working chamber 11 is improved, and on the other hand, the diameter of the piston part is larger than that of the plunger. 31. When the combination of the piston part and the plunger 31 receives a radial force, the piston part carries the radial force, which improves the matching accuracy of the plunger 31 in the working chamber 11.

在一些实施例中，泵体1包括多个套筒13组，多个套筒13组与柱塞组3一一对应，套筒13组中包括多个沿曲轴2的周向间隔布置的套筒13，套筒13沿着曲轴2的径向延伸，活塞部和套筒13一一对应，且活塞部导向装配于套筒13内。In some embodiments, the pump body 1 includes multiple sets of sleeves 13 , which correspond to the plunger set 3 one-to-one. The set of sleeves 13 includes a plurality of sleeves arranged at intervals along the circumferential direction of the crankshaft 2 . The sleeve 13 extends along the radial direction of the crankshaft 2 . The piston part corresponds to the sleeve 13 one-to-one, and the piston part is guided and assembled in the sleeve 13 .

具体地，套筒13组在前后方向的位置和与之对应的柱塞组3在前后方向的位置重合，套筒13组包括多个套筒13，套筒13与泵体1可拆卸的相连，多个套筒13与多个活塞部一一对应，套筒13的内腔形成活塞腔，活塞部导向配合与套筒13内。Specifically, the position of the sleeve group 13 in the front-to-back direction coincides with the position of the corresponding plunger group 3 in the front-to-back direction. The sleeve group 13 includes a plurality of sleeves 13, and the sleeves 13 are detachably connected to the pump body 1. , the plurality of sleeves 13 correspond to the plurality of piston parts one by one, the inner cavity of the sleeve 13 forms a piston cavity, and the piston part is guided and matched with the sleeve 13 .

由此，一方面活塞部滑动配合于套筒13，套筒13可拆卸便于在套筒13磨损后更换，从而提高本公开实施例的柱塞泵的寿命，另一方面套筒13的体积较小，易于控制加工精度，从而提高泵体1与活塞部之间的配合精度。Therefore, on the one hand, the piston part is slidingly fitted to the sleeve 13, and the sleeve 13 is detachable and easy to replace after the sleeve 13 is worn, thereby increasing the life of the plunger pump of the embodiment of the present disclosure. On the other hand, the volume of the sleeve 13 is relatively large. Small, it is easy to control the machining accuracy, thereby improving the matching accuracy between the pump body 1 and the piston part.

在一些实施例中，如图5所示，泵体1包括多个外壳14，多个外壳14沿曲轴2的轴向平行布置，柱塞组3配合于外壳14，且多个外壳14与多个柱塞组3一一对应。In some embodiments, as shown in FIG. 5 , the pump body 1 includes a plurality of housings 14 , the plurality of housings 14 are arranged in parallel along the axial direction of the crankshaft 2 , the plunger group 3 is matched with the housings 14 , and the plurality of housings 14 are connected with the plurality of housings 14 . Each plunger group 3 corresponds one to one.

具体地，外壳14为环形，外壳14沿曲轴2的周向闭合延伸，外壳14内设有通孔，通孔沿曲轴2的延伸方向贯穿外壳14，曲轴2转动配合于通孔内，多个外壳14的通孔沿曲轴的轴向排列形成装配空间12，与外壳14对应的柱塞组3的星轮32配合在曲轴2与外壳14之间，外壳14的外周侧设有多个阀体141，多个阀体141与多个工作容腔11一一对应，工作容腔11设于阀体141内，套筒13设于工作容腔11和曲轴2之间，与外壳14对应的柱塞组3的活塞部34配合于套筒13内，与外壳14对应的柱塞组3的柱塞31配合于工作容腔11内。Specifically, the housing 14 is annular, and the housing 14 is closed and extended along the circumferential direction of the crankshaft 2. A through hole is provided in the housing 14, and the through hole penetrates the housing 14 along the extension direction of the crankshaft 2. The crankshaft 2 rotates and fits in the through hole, and a plurality of The through holes of the housing 14 are arranged along the axial direction of the crankshaft to form an assembly space 12. The star wheel 32 of the plunger group 3 corresponding to the housing 14 is fitted between the crankshaft 2 and the housing 14. A plurality of valve bodies are provided on the outer peripheral side of the housing 14. 141. The plurality of valve bodies 141 correspond to the plurality of working chambers 11 one by one. The working chamber 11 is arranged in the valve body 141. The sleeve 13 is arranged between the working chamber 11 and the crankshaft 2. The column corresponding to the housing 14 The piston portion 34 of the plug group 3 is fitted in the sleeve 13 , and the plunger 31 of the plunger group 3 corresponding to the housing 14 is fitted in the working chamber 11 .

由此，通过设置多个外壳14拼接形成泵体1，一方面泵体1可沿曲轴2的轴向拆分以便于对本公开实施例的柱塞泵进行维修，另一方面泵体1可沿曲轴2的轴向拼合，以便于泵体1和多个柱塞组3装配于曲轴2。Therefore, by arranging multiple housings 14 and splicing them together to form the pump body 1, on the one hand, the pump body 1 can be disassembled along the axial direction of the crankshaft 2 to facilitate the maintenance of the plunger pump of the embodiment of the present disclosure; on the other hand, the pump body 1 can be disassembled along the axial direction of the crankshaft 2. The crankshaft 2 is axially assembled to facilitate the assembly of the pump body 1 and the plurality of plunger groups 3 on the crankshaft 2 .

在一些实施例中，多个连杆33包括主连杆331和多个副连杆332，主连杆331的一端与星轮32固定相连，主连杆331的另一端与活塞部可转动地相连，副连杆332的一端可转动地装配于第二孔，副连杆332的另一端与活塞部可转动地相连。In some embodiments, the plurality of connecting rods 33 includes a main connecting rod 331 and a plurality of auxiliary connecting rods 332. One end of the main connecting rod 331 is fixedly connected to the star wheel 32, and the other end of the main connecting rod 331 is rotatably connected to the piston part. Connected, one end of the auxiliary connecting rod 332 is rotatably assembled in the second hole, and the other end of the auxiliary connecting rod 332 is rotatably connected to the piston part.

具体地，每个柱塞组3中包括多个连杆33，每个柱塞组3中的多个连杆33中都有一个主连杆331，其余的连杆33为副连杆332，主连杆331与星轮32固定相连，副连杆332与星轮32可转动地相连，主连杆331与活塞部可转动地相连，副连杆332与活塞部可转动地相连。Specifically, each plunger group 3 includes multiple connecting rods 33. Each of the multiple connecting rods 33 in each plunger group 3 has a main connecting rod 331, and the remaining connecting rods 33 are auxiliary connecting rods 332. The main connecting rod 331 is fixedly connected to the star wheel 32, the auxiliary connecting rod 332 is rotatably connected to the star wheel 32, the main connecting rod 331 is rotatably connected to the piston part, and the auxiliary connecting rod 332 is rotatably connected to the piston part.

由此，星轮32在装配空间12内只能绕曲轴2的转轴做平移圆周运动，避免星轮32在装配空间12内做圆周运动，完全将曲轴2的转动运动转化为柱塞31在工作容腔11内的平移运动。Therefore, the star wheel 32 can only make a translational circular motion around the rotation axis of the crankshaft 2 in the assembly space 12 , preventing the star wheel 32 from making a circular motion in the assembly space 12 , and completely converting the rotational motion of the crankshaft 2 into the work of the plunger 31 Translational movement in the cavity 11.

在一些实施例中，多个柱塞组3的主连杆331的延伸方向具有夹角。In some embodiments, the extending directions of the main connecting rods 331 of the plurality of plunger groups 3 have included angles.

具体地，多个柱塞组3包括第一柱塞组301和第二柱塞组302，第一柱塞组301的主连杆331的延伸方向与第二柱塞组302的主连杆331的延伸方向在前后方向的投影具有夹角。Specifically, the plurality of plunger groups 3 include a first plunger group 301 and a second plunger group 302. The extension direction of the main connecting rod 331 of the first plunger group 301 is in the same direction as the main connecting rod 331 of the second plunger group 302. The projection of the extending direction in the front-to-back direction has an included angle.

由此，在本公开实施例的柱塞泵工作时，主连杆331收到较大的径向力，第一柱塞组301的主连杆331的延伸方向与第二柱塞组302的主连杆331的延伸方向不同，使第一柱塞组301的主连杆331的受力方向与第二柱塞组302的主连杆331的受力方向不同，从而减小本公开实施例的柱塞泵在工作时的振动幅度。Therefore, when the plunger pump of the embodiment of the present disclosure is operating, the main connecting rod 331 receives a large radial force, and the extension direction of the main connecting rod 331 of the first plunger group 301 is in line with the extension direction of the second plunger group 302. The extension directions of the main connecting rods 331 are different, so that the force-bearing direction of the main connecting rod 331 of the first plunger group 301 is different from the force-bearing direction of the main connecting rod 331 of the second plunger group 302, thereby reducing the size of the embodiment of the present disclosure. The vibration amplitude of the plunger pump during operation.

在一些实施例中，柱塞组3中柱塞31的数量为奇数。In some embodiments, the number of plungers 31 in the plunger group 3 is an odd number.

具体地，柱塞组3中有七个柱塞31，七个柱塞31沿着曲轴2的周向均匀间隔布置。由此，柱塞组3中有奇数个柱塞31，一方面当曲轴2转动时，曲轴2转动的功率可以均匀传递至每个柱塞31，另一方面避免星轮32在装配空间12内做单纯平移运动，从而降低了本公开实施例的柱塞泵在工作时的振动幅度。Specifically, there are seven plungers 31 in the plunger group 3 , and the seven plungers 31 are evenly spaced along the circumferential direction of the crankshaft 2 . Therefore, there are an odd number of plungers 31 in the plunger group 3. On the one hand, when the crankshaft 2 rotates, the power of the rotation of the crankshaft 2 can be evenly transmitted to each plunger 31; on the other hand, the star wheel 32 is prevented from being in the assembly space 12. A simple translational movement is performed, thereby reducing the vibration amplitude of the plunger pump according to the embodiment of the present disclosure during operation.

在本公开的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”“内”、“外”、“顺时针”、“逆时针”、“轴向”、“径向”、“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本公开和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本公开的限制。In the description of the present disclosure, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " "Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inside", "Outside", "Clockwise", "Counterclockwise", "Axis", The orientations or positional relationships indicated by "radial direction", "circumferential direction", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply the referred devices or elements. Must have a specific orientation, be constructed and operate in a specific orientation and therefore are not to be construed as limitations on the disclosure.

此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。在本公开的描述中，“多个”的含义是至少两个，例如两个，三个等，除非另有明确具体的限定。In addition, the terms “first” and “second” are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Therefore, features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present disclosure, "plurality" means at least two, such as two, three, etc., unless otherwise expressly and specifically limited.

在本公开中，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”、“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接或彼此可通讯；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系，除非另有明确的限定。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本公开中的具体含义。In this disclosure, unless otherwise explicitly stated and limited, the terms "installation", "connection", "connection", "fixing" and other terms should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection. , or integrated; it can be mechanically connected, electrically connected or communicable with each other; it can be directly connected or indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction between two elements, Unless otherwise expressly limited. For those of ordinary skill in the art, the specific meanings of the above terms in this disclosure can be understood according to specific circumstances.

在本公开中，除非另有明确的规定和限定，第一特征在第二特征“上”或“下”可以是第一和第二特征直接接触，或第一和第二特征通过中间媒介间接接触。而且，第一特征在第二特征“之上”、“上方”和“上面”可是第一特征在第二特征正上方或斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”可以是第一特征在第二特征正下方或斜下方，或仅仅表示第一特征水平高度小于第二特征。In this disclosure, unless otherwise expressly stated and limited, a first feature being "on" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features may be in indirect contact through an intermediary. touch. Furthermore, the terms "above", "above" and "above" the first feature is above the second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "below" and "beneath" the first feature to the second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature has a smaller horizontal height than the second feature.

在本公开中，术语“一个实施例”、“一些实施例”、“示例”、“具体示例”、或“一些示例”等意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本公开的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不必须针对的是相同的实施例或示例。而且，描述的具体特征、结构、材料或者特点可以在任一个或多个实施例或示例中以合适的方式结合。此外，在不相互矛盾的情况下，本领域的技术人员可以将本说明书中描述的不同实施例或示例以及不同实施例或示例的特征进行结合和组合。In this disclosure, the terms "one embodiment," "some embodiments," "example," "specific examples," or "some examples" or the like mean that a particular feature, structure, material, or other feature is described in connection with the embodiment or example. Features are included in at least one embodiment or example of the disclosure. In this specification, the schematic expressions of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and combine different embodiments or examples and features of different embodiments or examples described in this specification unless they are inconsistent with each other.

尽管已经示出和描述了上述实施例，可以理解的是，上述实施例是示例性的，不能理解为对本公开的限制，本领域普通技术人员对上述实施例进行的变化、修改、替换和变型均在本公开的保护范围内。Although the above embodiments have been shown and described, it can be understood that the above embodiments are illustrative and should not be construed as limitations of the present disclosure. Changes, modifications, substitutions and modifications of the above embodiments may be made by those of ordinary skill in the art. All are within the protection scope of this disclosure.

Claims

一种柱塞泵，包括：A plunger pump including:

泵体，所述泵体设有多个工作容腔；A pump body, which is provided with multiple working chambers;

曲轴，所述曲轴可转动地装配于所述泵体，所述曲轴设有偏心段，所述偏心段的轴线与所述曲轴的轴线平行间隔布置；A crankshaft, the crankshaft is rotatably assembled to the pump body, the crankshaft is provided with an eccentric section, and the axis of the eccentric section is spaced parallel to the axis of the crankshaft;

柱塞组，所述柱塞组包括多个柱塞和星轮，多个所述柱塞沿所述星轮的周向间隔布置，所述柱塞的一端与所述星轮相连，所述柱塞的另一端导向装配于所述工作容腔，以适于调整所述工作容腔的容积，所述星轮可转动地装配于所述偏心段，以适于在所述曲轴转动时驱动所述柱塞在所述工作容腔内滑移。A plunger group, the plunger group includes a plurality of plungers and a star wheel, a plurality of the plungers are arranged at intervals along the circumference of the star wheel, one end of the plunger is connected to the star wheel, the The other end of the plunger is guided and assembled to the working chamber to be suitable for adjusting the volume of the working chamber. The star wheel is rotatably assembled to the eccentric section to be driven when the crankshaft rotates. The plunger slides within the working chamber.
根据权利要求1所述的柱塞泵，其中，所述泵体内设有装配空间，所述工作容腔与所述装配空间连通，所述工作容腔的内径的公称尺寸与所述柱塞的外径的公称尺寸相同。The plunger pump according to claim 1, wherein an assembly space is provided in the pump body, the working chamber is connected to the assembly space, and the nominal size of the inner diameter of the working chamber is the same as that of the plunger. The nominal dimensions of the outer diameter are the same.
根据权利要求2所述的柱塞泵，其中，所述曲轴包括轴芯，所述曲轴的所述轴芯沿前后方向延伸，所述曲轴的轴芯转动配合于所述装配空间内，所述偏心段设于所述轴芯的外周侧，所述偏心段的延伸方向与所述曲轴的延伸方向相同，所述偏心段的半径大于所述曲轴轴芯的半径，所述偏心段的轴线与所述曲轴的轴线的间距为所述偏心段的偏心距，所述偏心段偏心距小于所述轴芯的半径。The plunger pump according to claim 2, wherein the crankshaft includes an axis core, the axis core of the crankshaft extends in the front-rear direction, and the axis core of the crankshaft is rotationally fitted in the assembly space, and the An eccentric section is provided on the outer peripheral side of the shaft core. The extension direction of the eccentric section is the same as the extension direction of the crankshaft. The radius of the eccentric section is greater than the radius of the crankshaft core. The axis of the eccentric section is consistent with the extension direction of the crankshaft. The distance between the axes of the crankshaft is the eccentricity of the eccentric section, and the eccentricity of the eccentric section is smaller than the radius of the axis core.
根据权利要求1至3中任一项所述的柱塞泵，其中，多个所述柱塞组沿前后方向平行间隔布置，所述星轮为环形结构，所述星轮沿前后方向延伸，所述星轮转动装配于所述偏心段的外周侧，且所述星轮相对于所述偏心段可转动，所述柱塞位于所述星轮的外周侧，所述柱塞沿着所述曲轴的周向间隔布置，且任意相邻的两个所述曲轴的间距相同。The plunger pump according to any one of claims 1 to 3, wherein a plurality of the plunger groups are arranged in parallel and spaced apart along the front and rear direction, the star wheel is an annular structure, and the star wheel extends along the front and rear direction, The star wheel is rotatably assembled on the outer circumferential side of the eccentric section, and the star wheel is rotatable relative to the eccentric section. The plunger is located on the outer circumferential side of the star wheel, and the plunger moves along the The crankshafts are arranged at intervals in the circumferential direction, and the distance between any two adjacent crankshafts is the same.
根据权利要求1至4中任一项所述的柱塞泵，其中，所述柱塞组有多个，所述偏心段有多个，多个所述偏心段与多个所述柱塞组一一对应，多个偏心段沿着所述曲轴的长度方向间隔布置，相邻的两个所述偏心段之间具有设定偏转角度。The plunger pump according to any one of claims 1 to 4, wherein there are multiple plunger groups, multiple eccentric segments, multiple eccentric segments and multiple plunger groups. In one-to-one correspondence, a plurality of eccentric segments are arranged at intervals along the length direction of the crankshaft, and there is a set deflection angle between two adjacent eccentric segments.
根据权利要求5所述的柱塞泵，其中，多个所述偏心段沿着前后方向间隔布置，多个所述偏心段的偏心距和半径相同，多个所述偏心段包括第一段和第二段，所述第一段的轴线在前后方向上的投影和所述曲轴的轴线在前后方向的投影的连线和所述第二段的轴线在前后方向上的投影和所述曲轴的轴线在前后方向的投影的连线具有夹角，所述第一段和所述第二段之间具有设定偏转角度。The plunger pump according to claim 5, wherein a plurality of the eccentric segments are arranged at intervals along the front-rear direction, the eccentric distances and radii of the plurality of eccentric segments are the same, and the plurality of eccentric segments include a first segment and a first segment. The second section is a line connecting the projection of the axis of the first section in the front-rear direction and the projection of the axis of the crankshaft in the front-rear direction, and the projection of the axis of the second section in the front-rear direction and the projection of the axis of the crankshaft in the front-rear direction. The line connecting the projection of the axis in the front-to-back direction has an included angle, and there is a set deflection angle between the first section and the second section.
根据权利要求6所述的柱塞泵，其中，所述曲轴包括轴环，所述轴环设于相邻的两个所述偏心段之间，所述轴环与所述曲轴同轴延伸，所述轴环的半径尺寸大于所述偏心段的半径尺寸与所述偏心段的偏心距的和。The plunger pump according to claim 6, wherein the crankshaft includes a collar, the collar is provided between two adjacent eccentric sections, and the collar extends coaxially with the crankshaft, The radius size of the collar is greater than the sum of the radius size of the eccentric segment and the eccentricity of the eccentric segment.
根据权利要求7所述的柱塞泵，其中，所述轴环设于所述第一段和所述第二段之间，所述轴环设于所述曲轴的轴芯的外周侧，所述轴环与所述曲轴的轴芯同轴延伸，所述轴环外圈的半径大于所述偏心段的半径和偏心距的和，所述偏心段在前后方向的投影完全落入所述轴环在前后方向的投影内。The plunger pump according to claim 7, wherein the collar is provided between the first section and the second section, and the collar is provided on the outer peripheral side of the axis core of the crankshaft, so The collar extends coaxially with the axis of the crankshaft. The radius of the outer ring of the collar is greater than the sum of the radius and the eccentricity of the eccentric segment. The projection of the eccentric segment in the front and rear direction completely falls into the shaft. The ring is within the projection in the anteroposterior direction.
根据权利要求5至8中任一项所述的柱塞泵，其中，所述柱塞泵包括驱动器，所述曲轴的端部伸出所述泵体并形成外延段，所述驱动器适于与所述外延段相连以驱动所述曲轴转动。The plunger pump according to any one of claims 5 to 8, wherein the plunger pump includes a driver, the end of the crankshaft extends out of the pump body and forms an extension section, and the driver is adapted to be connected with the pump body. The extension sections are connected to drive the crankshaft to rotate.
根据权利要求1至9中任一项所述的柱塞泵，其中，所述星轮与所述偏心段同轴延伸，所述星轮内设有第一孔和多个第二孔，多个所述第二孔沿所述第一孔的外周侧间隔布置，所述第一孔和所述第二孔沿所述星轮的轴向延伸，所述偏心段可转动地装配于所述第一孔内，多个所述第二孔与所述柱塞一一对应以供多个所述柱塞与所述星轮相连。The plunger pump according to any one of claims 1 to 9, wherein the star wheel extends coaxially with the eccentric section, and a first hole and a plurality of second holes are provided in the star wheel. The second holes are spaced apart along the outer circumferential side of the first hole, the first holes and the second holes extend along the axial direction of the star wheel, and the eccentric section is rotatably assembled on the In the first hole, a plurality of second holes correspond to the plungers one-to-one for connecting the plurality of plungers to the star wheel.
根据权利要求10所述的柱塞泵，其中，所述星轮的轴线与所述偏心段的轴线重合，所述星轮的内圈与所述偏心段的外圈可转动的相连，所述星轮的内圈形成所述第一孔，所述第一孔为通孔，所述第一孔的内壁和所述偏心段的外圈之间设有轴承。The plunger pump according to claim 10, wherein the axis of the star wheel coincides with the axis of the eccentric section, the inner ring of the star wheel is rotatably connected to the outer ring of the eccentric section, and the The inner ring of the star wheel forms the first hole, the first hole is a through hole, and a bearing is provided between the inner wall of the first hole and the outer ring of the eccentric section.
根据权利要求10或11所述的柱塞泵，其中，所述第二孔的延伸方向与所述星轮的轴向相同，且所述第二孔为贯穿所述星轮前后两端的通孔，所述柱塞通过与其对应的所述第二孔与所述星轮相连，且所述柱塞被配置为沿着与其对应的所述第二孔的轴线摆动。The plunger pump according to claim 10 or 11, wherein the extending direction of the second hole is the same as the axial direction of the star wheel, and the second hole is a through hole penetrating both front and rear ends of the star wheel. , the plunger is connected to the star wheel through the second hole corresponding to it, and the plunger is configured to swing along the axis of the second hole corresponding to it.
根据权利要求10至12中任一项所述的柱塞泵，其中，所述柱塞组包括多个活塞部和多个连杆，所述连杆的一端装配于所述第二孔，所述连杆的另一端与所述活塞部可转动地相连，所述柱塞设于所述活塞部背离所述连杆的一端，所述活塞部可滑动地装配于所述泵体。The plunger pump according to any one of claims 10 to 12, wherein the plunger group includes a plurality of piston parts and a plurality of connecting rods, one end of the connecting rod is assembled to the second hole, The other end of the connecting rod is rotatably connected to the piston part, the plunger is provided on an end of the piston part away from the connecting rod, and the piston part is slidably assembled on the pump body.
根据权利要求13所述的柱塞泵，其中，多个所述活塞部与多个所述柱塞一一对应，多个所述连杆与多个得到柱塞一一对应，所述柱塞的一端配合于所述工作容腔，所述柱塞的另一端和与其对应的所述活塞部相连，所述活塞部的延伸方向与所述连杆的延伸方向相同。The plunger pump according to claim 13, wherein a plurality of the piston portions are in a one-to-one correspondence with a plurality of the plungers, a plurality of the connecting rods are in a one-to-one correspondence with a plurality of plungers, and the plungers are One end of the plunger is matched with the working chamber, and the other end of the plunger is connected to the corresponding piston part. The extension direction of the piston part is the same as the extension direction of the connecting rod.
根据权利要求2至14中任一项所述的柱塞泵，其中，所述泵体设有活塞腔，所述活塞腔设于所述工作容腔靠近所述装配空间的一侧，所述活塞腔与所述工作容腔一一对应，且所述活塞腔和与之对应的所述工作容腔同轴延伸。The plunger pump according to any one of claims 2 to 14, wherein the pump body is provided with a piston chamber, and the piston chamber is located on a side of the working chamber close to the assembly space, and the The piston chamber corresponds to the working chamber one-to-one, and the piston chamber and the corresponding working chamber extend coaxially.
根据权利要求13或14所述的柱塞泵，其中，所述泵体包括多个套筒组，多个所述套筒组与所述柱塞组一一对应，所述套筒组中包括多个沿所述曲轴的周向间隔布置的套筒，套筒沿着所述曲轴的径向延伸，所述活塞部和所述套筒一一对应，且所述活塞部导向装配于所述套筒内。The plunger pump according to claim 13 or 14, wherein the pump body includes a plurality of sleeve groups, the plurality of sleeve groups correspond to the plunger group one-to-one, and the sleeve group includes A plurality of sleeves are arranged at intervals along the circumferential direction of the crankshaft. The sleeves extend along the radial direction of the crankshaft. The piston part corresponds to the sleeve one-to-one, and the piston part is guided and assembled on the inside the sleeve.
根据权利要求16所述的柱塞泵，其中，多个所述连杆包括主连杆和多个副连杆，所述主连杆的一端与所述星轮固定相连，所述主连杆的另一端与所述活塞部可转动地相连，所述副连杆的一端可转动地装配于所述第二孔，所述副连杆的另一端与所述活塞部可转动地相连。The plunger pump according to claim 16, wherein the plurality of connecting rods includes a main connecting rod and a plurality of auxiliary connecting rods, one end of the main connecting rod is fixedly connected to the star wheel, and the main connecting rod The other end of the auxiliary connecting rod is rotatably connected to the piston part, one end of the auxiliary connecting rod is rotatably assembled in the second hole, and the other end of the auxiliary connecting rod is rotatably connected to the piston part.
根据权利要求17所述的柱塞泵，其中，多个所述柱塞组的主连杆的延伸方向具有夹角。The plunger pump according to claim 17, wherein the extending directions of the main connecting rods of the plurality of plunger groups have included angles.
根据权利要求1至18中任一项所述的柱塞泵，其中，所述泵体包括多个外壳，多个所述外壳沿所述曲轴的轴向平行间隔布置，所述柱塞组配合于所述外壳，且多个所述外壳与多个所述柱塞组一一对应。The plunger pump according to any one of claims 1 to 18, wherein the pump body includes a plurality of housings, the plurality of housings are arranged in parallel and spaced apart along the axial direction of the crankshaft, and the plunger group cooperates with In the housing, a plurality of the housings corresponds to a plurality of the plunger groups in a one-to-one manner.
根据权利要求19所述的柱塞泵，其中，所述外壳为环形，所述外壳沿所述曲轴的周向闭合延伸，所述外壳内设有通孔，所述通孔沿所述曲轴的延伸方向贯穿所述外壳，所述曲轴转动配合于所述通孔内，多个所述外壳的通孔沿所述曲轴的轴向排列形成所述装配空间，与所述外壳对应的所述柱塞组的所述星轮配合在所述曲轴与所述外壳之间。The plunger pump according to claim 19, wherein the casing is annular, the casing extends closedly along the circumferential direction of the crankshaft, and a through hole is provided in the casing, and the through hole extends along the circumferential direction of the crankshaft. The extension direction penetrates the housing, the crankshaft is rotationally fitted in the through hole, a plurality of through holes of the housing are arranged along the axial direction of the crankshaft to form the assembly space, and the column corresponding to the housing The star wheel of the plug assembly is fitted between the crankshaft and the housing.
根据权利要求19或20所述的柱塞泵，其中，所述外壳的外周侧设有多个阀体，多个所述阀体与多个所述工作容腔一一对应，所述工作容腔设于所述阀体内，所述套筒设于所述工作容腔和所述曲轴之间，与所述外壳对应的所述柱塞组的所述活塞部配合于所述套筒内，与所述外壳对应的所述柱塞组的所述柱塞配合于所述工作容腔内。The plunger pump according to claim 19 or 20, wherein a plurality of valve bodies are provided on the outer peripheral side of the housing, and the plurality of valve bodies correspond to a plurality of the working chambers, and the working chambers are The cavity is provided in the valve body, the sleeve is provided between the working chamber and the crankshaft, and the piston part of the plunger group corresponding to the outer shell is fitted in the sleeve, The plungers of the plunger group corresponding to the housing are fitted in the working chamber.