WO2023115330A1 - 一种采用滚动支撑的水润滑高压泵 - Google Patents

一种采用滚动支撑的水润滑高压泵 Download PDF

Info

Publication number
WO2023115330A1
WO2023115330A1 PCT/CN2021/140070 CN2021140070W WO2023115330A1 WO 2023115330 A1 WO2023115330 A1 WO 2023115330A1 CN 2021140070 W CN2021140070 W CN 2021140070W WO 2023115330 A1 WO2023115330 A1 WO 2023115330A1
Authority
WO
WIPO (PCT)
Prior art keywords
water
plunger
curve
housing
aqueous solution
Prior art date
Application number
PCT/CN2021/140070
Other languages
English (en)
French (fr)
Inventor
张帆
Original Assignee
张帆
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 张帆 filed Critical 张帆
Priority to PCT/CN2021/140070 priority Critical patent/WO2023115330A1/zh
Priority to US18/271,310 priority patent/US20240060488A1/en
Priority to CN202180075613.XA priority patent/CN116802402A/zh
Publication of WO2023115330A1 publication Critical patent/WO2023115330A1/zh

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/18—Lubricating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/006—Crankshafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/14—Pistons, piston-rods or piston-rod connections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
    • F04B9/04—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms
    • F04B9/045—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms the means being eccentrics

Definitions

  • the invention relates to the technical field of high-pressure water pumps, in particular to a water-lubricated high-pressure pump using rolling supports.
  • High-pressure water pumps are used to produce high-pressure water.
  • core components they are widely used in high-pressure cleaning, fine mist fire extinguishing, spraying, seawater desalination, and deburring of mechanical parts.
  • Reciprocating pumps have a long history and are widely used to produce high-pressure water. They are mainly composed of crankshafts, connecting rods, crossheads, plungers and other components. Lubricating oil is used to lubricate the power end. Sealing is performed while keeping out water and lubricating oil. The main problems of this type of pump are: the lubricating oil needs to be replaced regularly, and the lubricating oil will pollute the environment; the life of the sealing structure is short, and it is troublesome to replace.
  • the high-pressure water pump realized by the water lubrication technology of the power end is environmentally friendly and high-efficiency, and is undoubtedly an important development direction of the high-pressure water pump.
  • the viscosity of water is low, the high-performance materials suitable for water are limited, and the design and matching of kinematic pairs are difficult. Therefore, water-lubricated high-pressure water pumps with higher pressure, strong environmental adaptability, and good economical efficiency have not been commercialized yet.
  • the purpose of the present invention is to provide a water-lubricated high-pressure pump with rolling support, so that the main shaft of the existing high-pressure water pump can realize economical and reliable support under the condition of significant deflection and deformation.
  • the present invention provides the following scheme:
  • the invention provides a water-lubricated high-pressure pump adopting a rolling support, which includes a driving mechanism, a housing, a rolling bearing, an isolation structure, at least one plunger and a plunger chamber;
  • the driving mechanism includes a main shaft and a shaft arranged on the main shaft At least one eccentric structure, the main shaft is rotatably connected to the housing through the rolling bearing at least on one side;
  • the eccentric structure is located in the first inner cavity of the housing, and the first inner cavity is also used for filling water or an aqueous solution;
  • the rolling bearing is located in the second inner cavity of the housing, and the isolation structure is used to seal the water or aqueous solution in the housing to prevent it from entering the second inner cavity; when the eccentric structure rotates, the The eccentric structure can push the plunger to move in the plunger chamber to pressurize the water or aqueous solution.
  • the isolation structure is a sealing structure
  • the sealing structure is a contact sealing structure
  • the rolling bearing is lubricated with grease.
  • a thrust structure is sheathed on the outer side of each of the eccentric structures, and the thrust structures are all located in the first inner chamber of the housing, and the thrust structure and the eccentric structure can rotate relatively, and the thrust structure
  • the structure and the eccentric structure form a first sliding friction pair, water or aqueous solution can enter the first sliding friction pair in the first inner cavity, and when the eccentric structure rotates, the thrust structure can push the column
  • the movement of the plug in the plunger cavity realizes the pressurization of water or aqueous solution.
  • the outer edge curve of the section perpendicular to the main shaft axis of the thrust structure includes a first curve and a second curve, and the vertical distance from a point on the first curve to the main shaft axis is determined by the first curve One end of the first curve gradually increases to the other end of the first curve, and the vertical distance from a point on the second curve to the axis of the main axis is determined by one end of the second curve connected to the other end of the first curve gradually decreases toward the other end of the second curve connected to one end of the first curve.
  • the outer surface of the eccentric structure and/or the inner surface of the thrust structure is provided with a first anti-friction layer; the first anti-friction layer is made of plastic.
  • the plunger includes a plunger body, one end of the plunger body extends into the plunger cavity, the plunger body and the plunger cavity form a second friction pair, and the plunger body
  • the outer surface of the piston and/or the inner surface of the plunger cavity is fixed with a second anti-friction layer; the second anti-friction layer is made of plastic.
  • a drainage cavity is provided between the isolation structure and the rolling bearing, and a water retaining ring is arranged in the drainage cavity, and the water retaining ring is sleeved on the main shaft, and the drainage cavity and the housing
  • the fluid channel is connected, and the water or aqueous solution in the drainage chamber is discharged to the outside of the housing through the fluid channel.
  • the driving mechanism of the high-pressure water pump of the present invention uses water and aqueous solution to achieve lubrication, and at the same time, water and aqueous solution can effectively solve the heat dissipation problem of the motion pair; the isolation structure isolates the housing space (second inner cavity) where the rolling bearing is located, avoiding water or aqueous solution
  • the impact on the rolling bearing makes it possible to adopt the economical traditional rolling bearing structure for the main shaft support structure, and solves the problem of the high-pressure water pump's main shaft deflection support.
  • the housing corresponding to the second inner cavity where the rolling bearing is located can transfer the heat generated by the rolling bearing to the water or aqueous solution, avoiding heat accumulation and enabling the high-pressure water pump to work continuously for a long time under high load conditions.
  • the driving mechanism of the high-pressure water pump of the present invention does not use lubricating oil, does not need regular maintenance work for changing lubricating oil, and the output pressure exceeds 30 MPa, which also has positive significance for protecting the environment.
  • the main shaft support structure of the present invention adopts traditional rolling bearings, avoids static pressure support, has simple structure, good economy, and no flow loss, which helps the high-pressure water pump to achieve higher pressure and volumetric efficiency, and the anti-pollution ability is also significantly improved.
  • Fig. 1 is the internal structure schematic diagram (embodiment 1) of the water-lubricated high-pressure pump adopting rolling support of the present invention
  • Fig. 2 is the A-A sectional view of Fig. 1 of the present invention (isolating structure one in embodiment one, adopts oil seal sealing structure);
  • Fig. 3 is the A-A cross-sectional view of Fig. 1 of the present invention (isolating structure two in embodiment one, adopts the lip seal structure with compensating function);
  • Fig. 4 is the A-A sectional view of Fig. 1 of the present invention (isolating structure three in embodiment one, adopts mechanical seal structure);
  • Fig. 5 is a schematic diagram of a driving mechanism of the present invention (Embodiment 1);
  • Fig. 6 is the B-B sectional view of Fig. 5 (embodiment one);
  • Fig. 7 is the second schematic diagram of the drive mechanism of the present invention (embodiment two);
  • Fig. 8 is the C-C sectional view of Fig. 7 (embodiment two);
  • 100-water-lubricated high-pressure pump with rolling support 1-liquid cylinder body, 2-housing body, 3-plunger body, 4-driving mechanism, 5-main shaft, 6-cam, 7-thrust structure, 8- First anti-friction layer, 9-rebound structure, 10-first baffle, 11-first elastic element, 12-plunger cavity, 13-second anti-friction layer, 14-isolation structure, 15-water retaining ring , 16-retaining ring, 17-rolling bearing, 18-first inner chamber, 19-second inner chamber, 20-drain chamber, 21-plunger, 22-first curve, 23-second curve, 24-fluid Channel, 32-eccentric structure, 35-connecting rod journal, 36-crank, 37-check valve, 54-housing water inlet, 55-hydraulic cylinder body water inlet.
  • the purpose of the present invention is to provide a water-lubricated high-pressure pump with rolling support, so that the main shaft of the existing high-pressure water pump can realize economical and reliable support under the condition of significant deflection and deformation.
  • this embodiment provides a water-lubricated high-pressure pump 100 using a rolling support, including a driving mechanism 4, a liquid cylinder body 1, a rebound structure 9, a rolling bearing 17, at least one plunger 21 and The plunger chamber 12;
  • the hydraulic cylinder body 1 is also called the pump head, which has the same function as the hydraulic cylinder body 1 of the existing reciprocating pump, and is one of the parts that mainly bear hydraulic pressure in the pump;
  • the hydraulic cylinder body 1 has high and low pressure fluid passages and One-way valve 37, one plunger 21 corresponds to one suction valve and one discharge valve to realize fluid distribution, realize the inflow of low-pressure water and the output of high-pressure water;
  • the cylinder body 1 can be integrally processed and formed, and can also be composed of multiple parts;
  • the housing 2 is fixedly connected to the right end of the liquid cylinder body 1, and the liquid cylinder body 1 and the housing 2 are detachably connected or integrally formed;
  • the housing 2 is also It can be fixed by combining multiple components.
  • the driving mechanism 4 includes a main shaft 5 and at least one eccentric structure 32 arranged on the main shaft 5.
  • the eccentric structure 32 is a cam 6, preferably in the form of an eccentric wheel.
  • the main shaft 5 is rotationally connected with the housing 2 through a rolling bearing 17 at least on one side.
  • the inner ring of the rolling bearing 17 is sleeved on the main shaft 5, and the outer ring of the rolling bearing 17 is sleeved inside the housing 2.
  • the rolling bearing 17 is preferably lubricated with grease.
  • each cam 6 is provided with a thrust structure 7, the thrust structure 7 and the cam 6 can rotate relatively, and the thrust structure 7 and the cam 6 form the first sliding friction pair;
  • the outer edge curve of the section of the thrust structure 7 perpendicular to the axis of the main shaft 5 includes The first curve 22 and the second curve 23, the vertical distance from the point on the first curve 22 to the axis of the main shaft 5 increases gradually from one end of the first curve 22 to the other end of the first curve 22, and the point on the second curve 23 The vertical distance to the axis of the main shaft 5 gradually decreases from one end of the second curve 23 connected with the other end of the first curve 22 to the other end of the second curve 23 connected with one end of the first curve 22 .
  • Both the cam 6 and the thrust structure 7 are located in the first inner cavity 18 of the housing 2, the rolling bearing 17 is located in the second inner cavity 19 of the housing 2, and an isolation structure 14 is arranged between the first inner cavity 18 and the second inner cavity 19,
  • the first inner cavity 18 is simultaneously used for filling water or aqueous solution, and water or aqueous solution can enter the first sliding friction pair, so that the first sliding friction pair can improve lubrication and heat dissipation through water or aqueous solution;
  • the thrust structure 7 The plunger 21 can be pushed to move in the plunger chamber 12 to pressurize water or aqueous solution; the left end of each plunger 21 is located in the liquid cylinder body 1, and the right end of each plunger 21 is in contact with the thrust structure 7, and the upper end of each plunger 21 is in contact with the thrust structure 7.
  • a rebound structure 9 is provided.
  • One end of the main shaft 5 is connected with a power device (such as a motor).
  • a power device such as a motor
  • the thrust structure 7 rolls against the contact surface of the plunger 21 (there may be some sliding), and pushes the plunger 21 in the liquid through contact.
  • the plunger chamber 12 of the cylinder body 1 moves toward the liquid cylinder body 1 to pressurize the water or aqueous solution and discharge the water; then, through the function of the rebound structure 9, ensure that the plunger 21 is 21 maintains contact with the thrust structure 7 and sucks in water.
  • the isolation structure 14 isolates the space of the first inner cavity 18 where the eccentric structure 32 is located from the space of the second inner cavity 19 where the rolling bearing 17 is located.
  • the isolation structure 14 is installed between the housing 2 and the main shaft 5, and the isolation structure 14 is located between the outermost eccentric structure 32 and the rolling bearing 17, and the outer side of the rolling bearing 17 is provided with a circlip 16.
  • the isolation structure 14 can prevent the water in the first inner cavity 18 of the housing 2 from entering the installation space of the rolling bearing 17 in the second inner cavity 19.
  • the isolation structure 14 can choose an oil seal structure, a lip seal structure with compensation function, or a mechanical seal structure wait.
  • the existing contact sealing structure is difficult to achieve complete sealing of water
  • a small amount of water or aqueous solution may enter the second inner cavity 19 from the first inner cavity 18 through the isolation structure 14, in order to prevent water or aqueous solution from
  • the water retaining ring 15 is fixed on the main shaft 5 between the isolation structure 14 and the rolling bearing 17, and the water retaining ring 15 is also located in the drainage cavity 20, and the drainage cavity 20 is provided with a fluid channel 24 to the outside of the housing 2.
  • the water retaining ring 15 can further prevent the leaked water or aqueous solution from reaching the rolling bearing 17 in the axial direction, and at the same time, the leaked water or aqueous solution can be discharged from the drain chamber 20 to the outside of the housing 2 through the fluid passage 24, ensuring that the rolling bearing 17 is completely isolated from the water or aqueous solution .
  • the contact seal structure is a vulnerable part, and the arrangement of the water retaining ring 15 and the drainage cavity 20 also helps to protect the rolling bearing 17 when the contact seal is damaged.
  • the outer surface of the cam 6 and/or the inner surface of the thrust structure 7 is provided with a first anti-friction layer 8 .
  • the first anti-friction layer 8 can be fixed with the cam 6 or the thrust structure 7 by bonding, interference fit, or can be formed directly on the surface by direct injection molding, spraying, etc., and water or aqueous solution enters the first sliding friction pair to generate fluid The hydrodynamic lubrication effect.
  • the first anti-friction layer 8 is made of plastic, preferably a thermoplastic material, such as polyether ether ketone, polyphenylene sulfide, polyamide, polyarylether, etc., by adding fibers, graphite, polytetrafluoroethylene, etc. Improve tribological properties.
  • the cam 6 and the main shaft 5 can be manufactured as an integral part, or can be manufactured separately and assembled and fixed, so that the cam 6 and the main shaft 5 rotate synchronously.
  • Each thrust structure 7 is respectively sleeved on each cam 6.
  • three cams 6 are arranged on the main shaft 5, and each cam 6 pushes a plunger 21 to pressurize water or aqueous solution; in the direction of rotation, the three cams There is a phase difference of 120 degrees between 6.
  • the plunger 21 can be formed by a single part or a combination of multiple parts.
  • the plunger 21 includes the plunger body 3 .
  • Each plunger body 3 is arranged on one side of the main shaft 5, which can simplify the structure and facilitate manufacture.
  • One end of the plunger body 3 extends into the plunger chamber 12 of the cylinder body 1, the plunger body 3 and the plunger chamber 12 form a second friction pair, and a gap of 1 ⁇ m-30 ⁇ m is set in the second friction pair, and the gap guarantee column
  • the plug body 3 moves smoothly in the plunger chamber 12, while preventing the high-pressure fluid in the plunger chamber 12 from leaking to the low-pressure end, and the water or aqueous solution acts as a lubricant for the friction pair in the gap, and at the same time takes away the frictional heat.
  • the outer surface of the plunger body 3 and/or the inner surface of the plunger chamber 12 is fixed with a second anti-friction layer 13 .
  • the second anti-friction layer 13 is plastic, preferably thermoplastic material, such as polyether ether ketone, polyphenylene sulfide, polyamide, polyarylether, etc., by adding fiber, graphite, polytetrafluoroethylene, etc. to the plastic, the friction can be effectively improved academic performance.
  • the second antifriction layer 13 can be fixed to the outer surface of the plunger body 3 or the inner surface of the plunger cavity 12 by bonding or interference fit, or it can be directly applied to the second friction layer 13 by injection molding, spraying or other processes. Secondary surface molding.
  • the rebound structure 9 includes a first baffle 10 and a first elastic element 11, the first baffle 10 is fixed to the right end of the plunger body 3, and one end of the first elastic element 11 abuts against the cylinder body 1, The other end of the first elastic element 11 abuts against the first baffle 10 .
  • This embodiment has a simple structure, the driving mechanism 4 does not need lubricating oil, is easy to maintain, and can realize a pressure output exceeding 30 MPa.
  • the eccentric structure 32 is a crankshaft
  • the connecting rod journal 35 is connected to the main shaft 5 through a crank 36
  • the thrust structure 7 is set on
  • the first antifriction layer 8 is provided on the outer surface of the connecting rod journal 35 and/or on the inner surface of the thrust structure 7 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details Of Reciprocating Pumps (AREA)

Abstract

本发明公开了一种采用滚动支撑的水润滑高压泵，涉及高压水泵技术领域，包括驱动机构、壳体、滚动轴承、隔离结构、至少一个柱塞及柱塞腔；驱动机构包括主轴和至少一个偏心结构，主轴至少在一侧通过滚动轴承与壳体转动连接；偏心结构位于壳体的第一内腔，第一内腔同时用于填充水或水溶液；滚动轴承位于壳体的第二内腔，隔离结构用于密封所述壳体内的水或水溶液，防止进入所述第二内腔；偏心结构旋转时，偏心结构能够推动柱塞在柱塞腔中运动实现对水或水溶液的增压。本发明的驱动机构不采用润滑油，主轴支撑结构采用传统滚动轴承，避免了静压支撑，结构简单。

Description

一种采用滚动支撑的水润滑高压泵 技术领域
本发明涉及高压水泵技术领域，特别是涉及一种采用滚动支撑的水润滑高压泵。
背景技术
高压水泵用于生产高压水，作为核心部件，广泛应用于高压清洗、细雾灭火、喷雾、海水淡化、去除机械零件毛刺等领域。
目前广泛应用的高压水泵有往复式泵，水润滑轴向柱塞泵。
往复式泵具有悠久的历史，大量用于生产高压水，主要由曲轴、连杆、十字头、柱塞等部件组成，采用润滑油对动力端进行润滑，需要采用接触式密封结构对增压水进行密封，同时隔绝水和润滑油。该类型泵最主要的问题在于：需要定期更换润滑油，且润滑油会污染环境；密封结构的寿命较短，更换麻烦。
上世界90年代，以丹佛斯为代表成功推出了商业化的水润滑轴向柱塞泵，相比往复式泵具有环保、能效高等优点；主要运动部件采用流体静压支承，实现了最大16MPa的压力输出。此外，公开号为CN105240237A的中国专利提出了一种水润滑柱塞泵。
采用动力端水润滑技术实现的高压水泵，具有环保性和高效率，无疑是高压水泵重要的发展方向。但水的粘度低，适用于水的高性能材料有限，运动副设计匹配困难，所以至今仍然未商业化实现具有更高压力、耐受环境适应性强、且经济性良好的水润滑高压水泵。
其中，制约动力端水润滑高压水泵发展的一个重要具体问题是主轴的支撑问题；在受载条件下，凸轮轴或者曲轴会产生挠曲变形，因此传统油润滑机械主轴两端的支撑普遍采用适应挠曲变形较好的滚动轴承。在水环境条件，GCr15等经济型轴承钢材料无法耐受腐蚀；由于缺乏润滑，且传统不锈钢材料接触疲劳强度远远不能保证长寿命的使用要求，因此除了采用昂贵的陶瓷滚动体轴承，没有经济型滚动轴承可以支撑水环境下的高强 度使用要求。此外，滑动轴承寿命长，可以耐腐蚀，但对轴的挠曲变形敏感，特别是针对低粘度流体环境条件，也难以使用。为此专利CN105240237A中，水泵主轴支撑不得不采用了流体静压支撑，显著提高了结构复杂性，同时带来高压流体泄露，污染物敏感等问题。
发明内容
本发明的目的是提供一种采用滚动支撑的水润滑高压泵，使现有高压水泵主轴在显著挠曲变形条件下，能够实现经济且可靠的支撑。
为实现上述目的，本发明提供了如下方案：
本发明提供了一种采用滚动支撑的水润滑高压泵，包括驱动机构、壳体、滚动轴承、隔离结构、至少一个柱塞及柱塞腔；所述驱动机构包括主轴和设置在所述主轴上的至少一个偏心结构，所述主轴至少在一侧通过所述滚动轴承与所述壳体转动连接；所述偏心结构位于所述壳体的第一内腔，所述第一内腔同时用于填充水或水溶液；所述滚动轴承位于所述壳体的第二内腔，所述隔离结构用于密封所述壳体内的水或水溶液，防止进入所述第二内腔；所述偏心结构旋转时，所述偏心结构能够推动所述柱塞在所述柱塞腔中运动实现对水或水溶液的增压。
优选地，所述隔离结构为密封结构，所述密封结构为接触式密封结构。
优选地，所述滚动轴承采用润滑脂进行润滑。
优选地，各所述偏心结构的外侧套设有推力结构，所述推力结构均位于所述壳体的所述第一内腔，所述推力结构与所述偏心结构能够相对转动，所述推力结构与所述偏心结构组成第一滑动摩擦副，水或水溶液能够进入所述第一内腔中的所述第一滑动摩擦副，所述偏心结构旋转时，所述推力结构能够推动所述柱塞在所述柱塞腔中运动实现对水或水溶液的增压。
优选地，所述推力结构垂直于所述主轴轴线的截面的外缘曲线包括第一曲线和第二曲线，所述第一曲线上的点到所述主轴轴线的垂直距离由所述第一曲线的一端向所述第一曲线的另一端逐渐增大，所述第二曲线上的点到所述主轴轴线的垂直距离由与所述第一曲线的另一端连接的所述第二曲线的一端向与所述第一曲线的一端连接的所述第二曲线的另一端逐 渐减小。
优选地，所述偏心结构的外表面和/或所述推力结构的内表面设置有第一减摩层；所述第一减摩层采用塑料制成。
优选地，所述柱塞包括柱塞本体，所述柱塞本体的一端伸入所述柱塞腔中，所述柱塞本体与所述柱塞腔组成第二摩擦副，所述柱塞本体的外表面和/或所述柱塞腔的内表面固定有第二减摩层；所述第二减摩层采用塑料制成。
优选地，所述隔离结构和所述滚动轴承之间设置有排水腔，所述排水腔内设置有挡水圈，所述挡水圈套设在所述主轴上，所述排水腔与所述壳体的流体通道连通，所述排水腔内的水或水溶液通过所述流体通道排出至所述壳体的外部。
本发明相对于现有技术取得了以下技术效果：
本发明的高压水泵驱动机构采用水和水溶液实现润滑，同时水和水溶液能够有效解决运动副的散热问题；通过隔离结构对滚动轴承所在壳体空间(第二内腔)的隔离，避免了水或者水溶液对滚动轴承的影响，使主轴支撑结构采用经济的传统滚动轴承结构成为可能，解决了困扰高压水泵的主轴挠曲支撑的问题。同时，滚动轴承所在的第二内腔对应的壳体可以将滚动轴承运转所产生的热量传递给水或水溶液，避免了热量的累积，使高压水泵能够在高载荷条件下长时间连续工作。本发明的高压水泵的驱动机构不采用润滑油，无需定时进行更换润滑油的维护工作，输出压力超过30MPa，对保护环境也具有积极意义。本发明的主轴支撑结构采用传统的滚动轴承，避免了静压支撑，结构简单，经济性好，且无流量损失，有助于高压水泵达到更高的压力和容积效率，抗污染能力也显著提高。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本发明的采用滚动支撑的水润滑高压泵的内部结构示意图(实施例一)；
图2为本发明的图1的A-A剖视图(实施例一中的隔离结构一，采用油封密封结构)；
图3为本发明的图1的A-A剖视图(实施例一中的隔离结构二，采用具有补偿功能的唇形密封结构)；
图4为本发明的图1的A-A剖视图(实施例一中的隔离结构三，采用机械密封结构)；
图5为本发明的驱动机构示意图一(实施例一)；
图6为图5的B-B剖视图(实施例一)；
图7为本发明的驱动机构示意图二(实施例二)；
图8为图7的C-C剖视图(实施例二)；
其中：100-采用滚动支撑的水润滑高压泵，1-液缸体，2-壳体，3-柱塞本体，4-驱动机构，5-主轴，6-凸轮，7-推力结构，8-第一减摩层，9-回弹结构，10-第一挡板，11-第一弹性元件，12-柱塞腔，13-第二减摩层，14-隔离结构，15-挡水圈，16-弹性挡圈，17-滚动轴承，18-第一内腔，19-第二内腔，20-排水腔，21-柱塞，22-第一曲线，23-第二曲线，24-流体通道，32-偏心结构，35-连杆轴颈，36-曲柄，37-单向阀，54-壳体入水口，55-液缸体入水口。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有付出创造性劳动的前提下所获得的所有其他实施例，都属于本发明保护的范围。
本发明的目的是提供一种采用滚动支撑的水润滑高压泵，使现有高压水泵主轴在显著挠曲变形条件下，能够实现经济且可靠的支撑。
为使本发明的上述目的、特征和优点能够更加明显易懂，下面结合附图和具体实施方式对本发明作进一步详细的说明。
实施例一
如图1-图6所示：本实施例提供了一种采用滚动支撑的水润滑高压泵100，包括驱动机构4、液缸体1、回弹结构9、滚动轴承17、至少一 个柱塞21及柱塞腔12；液缸体1也称为泵头，同现有往复泵的液缸体1功能相同，是泵中主要承受液压的零件之一；液缸体1内有高低压流体通道及单向阀37，一个柱塞21对应一个吸入阀和排出阀实现流体的配流，实现低压水的流入和高压水的输出；柱塞腔12可以设置在液缸体1或者壳体2上，液缸体1可以整体加工成型，也可以多部件组合而成；壳体2固定连接于液缸体1的右端，液缸体1和壳体2为可拆卸连接或者一体成型制造；壳体2也可由多部件组合固定而成。驱动机构4包括主轴5和设置在主轴5上的至少一个偏心结构32，本实施例中，偏心结构32为凸轮6，优选偏心轮形式。主轴5至少在一侧通过滚动轴承17与壳体2转动连接，滚动轴承17的内圈套接在主轴5上，滚动轴承17的外圈套接在壳体2内部，滚动轴承17优选润滑脂进行润滑。
各凸轮6的外侧套设有推力结构7，推力结构7与凸轮6能够相对转动，推力结构7与凸轮6组成第一滑动摩擦副；推力结构7垂直于主轴5轴线的截面的外缘曲线包括第一曲线22和第二曲线23，第一曲线22上的点到主轴5轴线的垂直距离由第一曲线22的一端向第一曲线22的另一端逐渐增大，第二曲线23上的点到主轴5轴线的垂直距离由与第一曲线22的另一端连接的第二曲线23的一端向与第一曲线22的一端连接的第二曲线23的另一端逐渐减小。
凸轮6和推力结构7均位于壳体2的第一内腔18，滚动轴承17位于壳体2的第二内腔19，第一内腔18和第二内腔19之间设置有隔离结构14，第一内腔18同时用于填充水或水溶液，水或水溶液能够进入第一滑动摩擦副，使第一滑动摩擦副能够通过水或水溶液来改善润滑和散热；偏心结构32旋转时，推力结构7能够推动柱塞21在柱塞腔12中运动实现对水或水溶液的增压；各柱塞21的左端位于液缸体1中，各柱塞21的右端与推力结构7接触，柱塞21上设置有回弹结构9。主轴5的一端与动力设备(如电机)相连，主轴5带动凸轮6旋转时，推力结构7在抵靠柱塞21接触面滚动(可能有部分滑动)的同时，通过接触推动柱塞21在液缸体1的柱塞腔12中向液缸体1的方向运动，实现对水或水溶液的增压并排出水；再通过回弹结构9的作用，确保柱塞21在回程过程中，柱塞21保持和推力结构7的接触，并吸入水。
如图2-图4所示隔离结构14将偏心结构32所在的第一内腔18的空间与滚动轴承17所在的第二内腔19的空间进行隔离。隔离结构14安装在壳体2和主轴5之间，且隔离结构14位于最外端的偏心结构32和滚动轴承17之间，滚动轴承17的外侧设置有弹性挡圈16。隔离结构14能够防止壳体2中第一内腔18的水进入第二内腔19的滚动轴承17安装空间，隔离结构14可以选择油封密封结构、具有补偿功能的唇形密封结构，或者机械密封结构等。在工作中，由于现有接触密封结构难以实现对水的完全密封，可能会有微量的水或水溶液通过隔离结构14由第一内腔18进入到第二内腔19，为了防止水或水溶液对滚动轴承17的侵蚀，在隔离结构14和滚动轴承17间的主轴5上固定有挡水圈15，挡水圈15同时位于排水腔20内，排水腔20设置有流体通道24至壳体2外部。挡水圈15可以进一步阻挡泄露的水或水溶液沿轴向到达滚动轴承17，同时泄露的水或水溶液通过流体通道24可从排水腔20排出到壳体2外部，确保滚动轴承17彻底和水或水溶液隔绝。接触密封结构是易损件，挡水圈15和排水腔20的设置也有助于在接触密封件受损时保护滚动轴承17。
本实施例中，凸轮6的外表面和/或推力结构7的内表面设置有第一减摩层8。第一减摩层8具体可通过粘接、过盈配合与凸轮6或推力结构7进行固定，也可直接注塑、喷涂等工艺直接在表面成型，水或水溶液进入第一滑动摩擦副中产生流体动压润滑效应。
第一减摩层8采用塑料制成，优选热塑性材料，例如聚醚醚酮、聚苯硫醚、聚酰胺、聚芳醚等，通过在塑料中添加纤维、石墨、聚四氟乙烯等可以有效改善摩擦学性能。
本实施例中，凸轮6可以和主轴5制造成为整体部件，也可以分部件制造并组装固定而成，使凸轮6和主轴5同步旋转。各推力结构7分别套设在各凸轮6上，本实施例在主轴5上设置三个凸轮6，每个凸轮6推动一个柱塞21对水或水溶液进行增压；在旋转方向，三个凸轮6之间互有120度相位差。
柱塞21可以通过单一零件或者多个零件组合构成，本实施例中，柱塞21包括柱塞本体3。各柱塞本体3均布置在主轴5的一侧，可简化结构，方便制造。柱塞本体3的一端伸入液缸体1的柱塞腔12中，柱塞本 体3与柱塞腔12组成第二摩擦副，第二摩擦副中设置有1μm-30μm的间隙，间隙保证柱塞本体3在柱塞腔12内顺畅运动，同时抑制柱塞腔12内的高压流体泄露到低压端，水或水溶液在间隙中起到摩擦副的润滑作用，同时带走摩擦热。
本实施例中柱塞本体3的外表面和/或柱塞腔12的内表面固定有第二减摩层13。第二减摩层13为塑料，优选热塑性材料，例如聚醚醚酮、聚苯硫醚、聚酰胺、聚芳醚等，通过在塑料中添加纤维、石墨、聚四氟乙烯等可以有效改善摩擦学性能。
本实施例中，第二减摩层13可通过粘接、过盈配合与柱塞本体3外表面或者柱塞腔12内表面进行固定，也可直接采用注塑、喷涂等工艺直接在第二摩擦副表面成型。
本实施例中，回弹结构9包括第一挡板10和第一弹性元件11，第一挡板10与柱塞本体3的右端固定，第一弹性元件11的一端与液缸体1相抵，第一弹性元件11的另一端与第一挡板10相抵。
本实施例结构简单，驱动机构4无需润滑油，维护便利，可以实现超过30MPa的压力输出。
实施例二
如图7-图8所示：本实施例与实施例一的区别在于：本实施例中，偏心结构32为曲轴，连杆轴颈35均通过曲柄36与主轴5连接，推力结构7套在连杆轴颈35的外周上，第一减摩层8设置连杆轴颈35的外表面和/或推力结构7的内表面。
本说明书中应用了具体个例对本发明的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本发明的方法及其核心思想；同时，对于本领域的一般技术人员，依据本发明的思想，在具体实施方式及应用范围上均会有改变之处。综上所述，本说明书内容不应理解为对本发明的限制。

Claims (8)

  1. 一种采用滚动支撑的水润滑高压泵，其特征在于：包括驱动机构、壳体、滚动轴承、隔离结构、至少一个柱塞及柱塞腔；所述驱动机构包括主轴和设置在所述主轴上的至少一个偏心结构，所述主轴至少在一侧通过所述滚动轴承与所述壳体转动连接；所述偏心结构位于所述壳体的第一内腔，所述第一内腔同时用于填充水或水溶液；所述滚动轴承位于所述壳体的第二内腔，所述隔离结构用于密封所述壳体内的水或水溶液，防止进入所述第二内腔；所述偏心结构旋转时，所述偏心结构能够推动所述柱塞在所述柱塞腔中运动实现对水或水溶液的增压。
  2. 根据权利要求1所述的采用滚动支撑的水润滑高压泵，其特征在于：所述隔离结构为密封结构，所述密封结构为接触式密封结构。
  3. 根据权利要求2所述的采用滚动支撑的水润滑高压泵，其特征在于：所述滚动轴承采用润滑脂进行润滑。
  4. 根据权利要求2所述的采用滚动支撑的水润滑高压泵，其特征在于：各所述偏心结构的外侧套设有推力结构，所述推力结构均位于所述壳体的所述第一内腔，所述推力结构与所述偏心结构能够相对转动，所述推力结构与所述偏心结构组成第一滑动摩擦副，水或水溶液能够进入所述第一内腔中的所述第一滑动摩擦副，所述偏心结构旋转时，所述推力结构能够推动所述柱塞在所述柱塞腔中运动实现对水或水溶液的增压。
  5. 根据权利要求4所述的采用滚动支撑的水润滑高压泵，其特征在于：所述推力结构垂直于所述主轴轴线的截面的外缘曲线包括第一曲线和第二曲线，所述第一曲线上的点到所述主轴轴线的垂直距离由所述第一曲线的一端向所述第一曲线的另一端逐渐增大，所述第二曲线上的点到所述主轴轴线的垂直距离由与所述第一曲线的另一端连接的所述第二曲线的一端向与所述第一曲线的一端连接的所述第二曲线的另一端逐渐减小。
  6. 根据权利要求5所述的采用滚动支撑的水润滑高压泵，其特征在于：所述偏心结构的外表面和/或所述推力结构的内表面设置有第一减摩层；所述第一减摩层采用塑料制成。
  7. 根据权利要求2所述的采用滚动支撑的水润滑高压泵，其特征在于：所述柱塞包括柱塞本体，所述柱塞本体的一端伸入所述柱塞腔中，所述柱 塞本体与所述柱塞腔组成第二摩擦副，所述柱塞本体的外表面和/或所述柱塞腔的内表面固定有第二减摩层；所述第二减摩层采用塑料制成。
  8. 根据权利要求1所述的采用滚动支撑的水润滑高压泵，其特征在于：所述隔离结构和所述滚动轴承之间设置有排水腔，所述排水腔内设置有挡水圈，所述挡水圈套设在所述主轴上，所述排水腔与所述壳体的流体通道连通，所述排水腔内的水或水溶液通过所述流体通道排出至所述壳体的外部。
PCT/CN2021/140070 2021-12-21 2021-12-21 一种采用滚动支撑的水润滑高压泵 WO2023115330A1 (zh)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PCT/CN2021/140070 WO2023115330A1 (zh) 2021-12-21 2021-12-21 一种采用滚动支撑的水润滑高压泵
US18/271,310 US20240060488A1 (en) 2021-12-21 2021-12-21 Water-lubricated high-pressure pump using rolling support
CN202180075613.XA CN116802402A (zh) 2021-12-21 2021-12-21 一种采用滚动支撑的水润滑高压泵

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2021/140070 WO2023115330A1 (zh) 2021-12-21 2021-12-21 一种采用滚动支撑的水润滑高压泵

Publications (1)

Publication Number Publication Date
WO2023115330A1 true WO2023115330A1 (zh) 2023-06-29

Family

ID=86900806

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2021/140070 WO2023115330A1 (zh) 2021-12-21 2021-12-21 一种采用滚动支撑的水润滑高压泵

Country Status (3)

Country Link
US (1) US20240060488A1 (zh)
CN (1) CN116802402A (zh)
WO (1) WO2023115330A1 (zh)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08254185A (ja) * 1995-03-15 1996-10-01 Mitsubishi Heavy Ind Ltd 回転ピストン機械
JPH10288146A (ja) * 1997-04-11 1998-10-27 Gijutsu Kaihatsu Sogo Kenkyusho:Kk ラジアルプランジャポンプ
CN201218170Y (zh) * 2008-05-12 2009-04-08 华中科技大学 柱塞配流轴向柱塞液压泵
CN104454420A (zh) * 2014-12-11 2015-03-25 浙江大学 斜盘旋转式内置阀配流轴向柱塞泵
CN104696212A (zh) * 2015-01-15 2015-06-10 浙江沃尔液压科技有限公司 水润滑曲轴式高压柱塞泵
CN204511865U (zh) * 2015-01-15 2015-07-29 沃尔科技有限公司 柱塞组件和水润滑曲轴式高压柱塞泵
CN105240237A (zh) * 2015-10-29 2016-01-13 华中科技大学 一种水润滑柱塞泵
CN108266429A (zh) * 2018-03-04 2018-07-10 太原理工大学 一种油水分离水液压静力平衡密封与润滑柱塞
CN214035951U (zh) * 2020-12-30 2021-08-24 山西方盛液压机电设备有限公司 一种水压驱动液压五星马达

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08254185A (ja) * 1995-03-15 1996-10-01 Mitsubishi Heavy Ind Ltd 回転ピストン機械
JPH10288146A (ja) * 1997-04-11 1998-10-27 Gijutsu Kaihatsu Sogo Kenkyusho:Kk ラジアルプランジャポンプ
CN201218170Y (zh) * 2008-05-12 2009-04-08 华中科技大学 柱塞配流轴向柱塞液压泵
CN104454420A (zh) * 2014-12-11 2015-03-25 浙江大学 斜盘旋转式内置阀配流轴向柱塞泵
CN104696212A (zh) * 2015-01-15 2015-06-10 浙江沃尔液压科技有限公司 水润滑曲轴式高压柱塞泵
CN204511865U (zh) * 2015-01-15 2015-07-29 沃尔科技有限公司 柱塞组件和水润滑曲轴式高压柱塞泵
CN105240237A (zh) * 2015-10-29 2016-01-13 华中科技大学 一种水润滑柱塞泵
CN108266429A (zh) * 2018-03-04 2018-07-10 太原理工大学 一种油水分离水液压静力平衡密封与润滑柱塞
CN214035951U (zh) * 2020-12-30 2021-08-24 山西方盛液压机电设备有限公司 一种水压驱动液压五星马达

Also Published As

Publication number Publication date
US20240060488A1 (en) 2024-02-22
CN116802402A (zh) 2023-09-22

Similar Documents

Publication Publication Date Title
EP2497949B1 (en) Plunger water pump
CN102141022B (zh) 双斜盘阀配流轴向柱塞式水液压屏蔽泵
CN104612958A (zh) 泵
CN108266429B (zh) 一种油水分离水液压静力平衡密封与润滑柱塞
CN108278186B (zh) 一种油水分离式空间凸轮传动的二维柱塞水压泵
WO2018196256A1 (zh) 一种二维活塞输油泵
CN103696921A (zh) 一种采用液压力回程的阀配流式径向柱塞液压泵
CN201615056U (zh) 一种高自吸性能转子泵
CN103742378B (zh) 一种采用滑阀配流的径向柱塞液压泵
CN109653973B (zh) 一种水润滑轴阀复合配流的径向柱塞泵
CN101216022B (zh) 柱塞配流轴向柱塞液压泵
CN111396279B (zh) 力平衡式二维柱塞泵
CN108302033B (zh) 一种高水基柱塞式液压泵的轴向可伸缩缸组件
CN101608607A (zh) 一种超高压柱塞泵
WO2023115330A1 (zh) 一种采用滚动支撑的水润滑高压泵
CN102959259B (zh) 静液压机，尤其是轴向活塞机
CN201606207U (zh) 双斜盘阀配流轴向柱塞式水液压屏蔽泵
RU169276U1 (ru) Уплотнительное устройство для цилиндрических пар гидропневмомашин
WO2023115328A1 (zh) 一种基于水或水溶液润滑的高压水泵
CN108194298B (zh) 一种油水分离式滚轮导轨传动的二维柱塞水压泵
RU2649176C1 (ru) Плунжерный насос
CN114576126A (zh) 液压联动式柱塞推动机构及使用该机构的柱塞隔膜泵
CN212774616U (zh) 一种新型高压钢球滚动管塞泵
CN201539376U (zh) 一种超高压柱塞泵
CN101298868A (zh) 旋片转子泵

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 202180075613.X

Country of ref document: CN

WWE Wipo information: entry into national phase

Ref document number: 18271310

Country of ref document: US

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21968483

Country of ref document: EP

Kind code of ref document: A1