WO2019047592A1 - 高密封二级高压泵 - Google Patents

高密封二级高压泵 Download PDF

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Publication number
WO2019047592A1
WO2019047592A1 PCT/CN2018/093020 CN2018093020W WO2019047592A1 WO 2019047592 A1 WO2019047592 A1 WO 2019047592A1 CN 2018093020 W CN2018093020 W CN 2018093020W WO 2019047592 A1 WO2019047592 A1 WO 2019047592A1
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WO
WIPO (PCT)
Prior art keywords
pressure
stage
piston
cylinder
sealing
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PCT/CN2018/093020
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English (en)
French (fr)
Inventor
高雪峰
陈进海
苏明明
戴艳飞
高杨清
Original Assignee
南通广兴气动设备有限公司
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Application filed by 南通广兴气动设备有限公司 filed Critical 南通广兴气动设备有限公司
Priority to EP18853519.9A priority Critical patent/EP3575598B1/en
Priority to ES18853519T priority patent/ES2855677T3/es
Priority to US16/464,686 priority patent/US11002263B2/en
Publication of WO2019047592A1 publication Critical patent/WO2019047592A1/zh

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    • 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
    • F04B25/00—Multi-stage pumps
    • F04B25/005—Multi-stage pumps with two cylinders
    • 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
    • F04B25/00—Multi-stage pumps
    • 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
    • F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
    • F04B35/01—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being mechanical
    • 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
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • 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
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/0005—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 adaptations of pistons
    • F04B39/0016—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 adaptations of pistons with valve arranged in the piston
    • 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
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/0094—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 crankshaft
    • 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
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/06—Cooling; Heating; Prevention of freezing
    • 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
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/10—Adaptations or arrangements of distribution members
    • 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
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/16—Filtration; Moisture separation
    • 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
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/08—Regulating by delivery pressure
    • 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
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
    • 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
    • F04B53/143—Sealing provided on the piston

Definitions

  • the invention relates to an air pump. Specifically, it relates to a high-sealing secondary high-pressure pump.
  • the existing ram type air pump basically comprises a pump body and a motor for driving the pump body installed outside the pump body.
  • the output air pressure requirement is getting higher and higher.
  • the conventional air pump on the market is obviously difficult to meet the requirements, and the pressure is often insufficient and the sealing performance is poor.
  • the object of the present invention is to provide a high-sealing two-stage high-pressure pump with high output gas pressure and good sealing performance against the defects and deficiencies of the prior art.
  • a high-sealing secondary high-pressure pump which is characterized in that it comprises a motor, a muffler filter and a high-pressure filter, and a gearbox is arranged in front of the motor, and the gearbox interior
  • a gearbox is arranged in front of the motor, and the gearbox interior
  • There is an output shaft one end of the output shaft is connected with a crankshaft, one end of the crankshaft is connected with a connecting rod, one end of the connecting rod is connected with the crankshaft, and the other end is connected with a first stage piston, and one end of the first stage piston is provided with one stage.
  • a cylinder the other end is connected with a secondary piston rod
  • one end of the first stage cylinder is provided with a first stage cylinder head
  • a cylinder block is fixed on the periphery of the first stage cylinder
  • the first stage cylinder head is connected with a muffler filter
  • the second piston rod is sealingly connected to the first stage piston
  • the other end of the second stage piston rod is connected with a high pressure piston
  • one end of the high pressure piston is provided with a secondary cylinder
  • one end of the second stage cylinder is connected with a high pressure cylinder cover.
  • One end of the high-pressure cylinder head is connected with a pressure limit explosion-proof device, and the other side is connected with a high-pressure filter through a high-pressure gas pipe.
  • a pressure gauge is disposed above the high pressure filter, and a lower end of the high pressure filter is provided with a gas release valve.
  • the high pressure filter is internally provided with a water and water separation component, and a high pressure outlet is disposed on one side of the high pressure filter.
  • a one-way valve piece is disposed between the first-stage cylinder head and the first-stage cylinder.
  • the first-stage piston is internally provided with a gas storage chamber, and one end of the first-stage piston is provided with a first-stage one-way valve, and the first-stage piston is sleeved with a guide ring.
  • the secondary piston rod is internally provided with a gas hole, one end of which is connected to the gas storage chamber, and the other end is connected to the high pressure piston.
  • the high pressure piston is internally provided with a two-stage check valve, and a high pressure check valve is arranged on one side of the high pressure cylinder cover.
  • the cylinder block is connected to a reduction gear box.
  • a heat dissipating device is further disposed on the exterior of the secondary cylinder.
  • the primary piston has a larger diameter area than the secondary piston rod.
  • the primary cylinder is disposed 180° coaxially with the compression chamber of the secondary cylinder.
  • the beneficial effects of the invention are: the first stage and the second stage cylinder of the air pump are 180° coaxial design, the working process is balanced, the volume is small, the energy saving and environmental protection, the output pressure pressure is high and the sealing property is good.
  • Figure 1 is a schematic view of the structure of the present invention.
  • a high-sealing two-stage high-pressure pump which comprises a motor 6 , a muffler filter 1 and a high-pressure filter 15 , and a gear box 7 is arranged in front of the motor 6 .
  • the reduction gear box 7 has an output shaft 20 therein.
  • One end of the output shaft 20 is connected with a crankshaft 8 .
  • One end of the crankshaft 8 is connected with a connecting rod 9 .
  • One end of the connecting rod 9 is connected with the crankshaft 8 and the other end is connected.
  • first stage piston 4 there is a first stage piston 4, one end of the first stage piston 4 is provided with a first stage cylinder 3, and the other end is connected with a secondary piston rod 19, one end of which is provided with a first stage cylinder head 2, the first stage cylinder 3
  • the periphery of the cylinder block 21 is fixed, and the first stage cylinder head 2 is connected to the muffler filter 1.
  • the second stage piston rod 19 is sealingly connected to the first stage piston 4, and the other end of the second stage piston rod 19 is connected with a high voltage.
  • a high-pressure piston 10 is provided with a secondary cylinder 11 at one end thereof, and a high-pressure cylinder cover 12 is connected to one end of the secondary cylinder 11 , and one end of the high-pressure cylinder cover 12 is connected with a pressure limit explosion-proof device 17 , and the other The side is connected to the high pressure filter 15 through a high pressure gas pipe 13.
  • a pressure gauge 14 is disposed above the high pressure filter 15, and a lower end of the high pressure filter 15 is provided with a deflation valve 16, and the inside of the high pressure filter 15 is provided with a water and water separation member 23, and the high pressure filter side A high pressure output port 22 is provided.
  • a one-way valve piece 31 is disposed between the primary cylinder head 2 and the primary cylinder 3.
  • the first stage piston 4 is internally provided with a gas storage chamber 18, and one end of the first stage piston 4 is provided with a first-stage check valve 41, and the first stage piston 4 is sleeved with a guide ring 42.
  • the secondary piston rod 19 is internally provided with a gas hole 192, one end of which is connected to the gas storage chamber 18, and the other end is connected to the high pressure piston 10.
  • the high pressure piston 10 is internally provided with a two-stage check valve 191, and a high pressure check valve 101 is disposed on one side of the high pressure cylinder cover 12.
  • the cylinder block 21 is connected to the reduction gear box 7.
  • a heat sink 5 is further disposed on the outside of the secondary cylinder 11.
  • the diameter of the primary piston 4 is larger than the diameter of the secondary piston rod 19.
  • the primary cylinder 3 is disposed 180° coaxially with the compression chamber of the secondary cylinder 11.
  • the working principle of the invention the output of the motor 6 is decelerated by the reduction gear box 7 to increase the output torque.
  • the crankshaft 8 uses a disk crankshaft to reduce vibration at high rotational speeds.
  • the crankshaft 8 drives the connecting rod 9 to perform piston movement, and the gas enters the first-stage cylinder 3 through the muffler filter 1 on the first-stage cylinder head 2.
  • the gas After the first-stage piston 4 is compressed, the gas enters the gas storage chamber 18 to form an intermediate-pressure gas, and a part of the medium-pressure
  • the gas enters the secondary cylinder 11 from the gas storage chamber 18 through the hole 192 in the secondary piston rod and the high pressure piston 10.
  • the high pressure piston 10 When the high pressure piston 10 is compressed, the high pressure gas is generated by the two compressions to pass through the high pressure check valve 101 to enter the high pressure filtration.
  • the device 15 is outputted by the high voltage output port 22.
  • the beneficial effects of the invention are: the first stage and the second stage cylinder of the air pump are 180° coaxial design, the working process is balanced, the volume is small, the energy saving and environmental protection, the output pressure pressure is high and the sealing property is good.

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

Abstract

一种高密封二级高压泵，即一种气泵。减速箱（7）设于电机（6）前方，曲轴（8）与减速箱（7）内部的输出轴（20）相连，连杆（9）一侧与曲轴（8）相连，另一侧与一级活塞（4）相连，一级活塞（4）一端设有一级单向阀（41），一级活塞（4）中间设有气体储藏室（18）。一级活塞（4）另一端与二级活塞杆（19）高密封相连，二级活塞杆（19）中间设有气孔（192），另一端与高压活塞（10）相连；高压活塞（10）内设有二级单向阀（191）；一级气缸盖（2）进气口设有消音过滤器（1）及单向阀片（31），二级气缸（11）外部设有散热装置（5）；高压气缸盖（12）一侧设有二级气缸（11），另一侧设有压力限位防爆装置（17），高压气管（13）一端连接在高压气缸盖（12）一侧，另一端连接在高压过滤器（15）上。该气泵一级与二级气缸为180°同轴设计，工作过程用力均衡，体积小，节能环保，输出气体压力高且密封性好。

Description

高密封二级高压泵 技术领域
本发明涉及一种气泵。具体涉及一种高密封二级高压泵。
背景技术
现有的柱塞式气泵基本上包括有一个泵体，以及安装在泵体外的驱动泵体的电机构成，随着用到气泵的各种小家电越来越多，气泵的应用领域越来越广，输出的气压要求越来越高，然目前市面上的普通气泵显然难以达到要求，使用时经常出现压力不足的情况且密封性较差。
发明内容
本发明的目的在于针对现有技术的缺陷和不足，提供一种输出气体压力高且密封性好的高密封二级高压泵。
为实现上述目的，本发明采用以下技术方案是：高密封二级高压泵，其特征在于：它包括电机、消音过滤器和高压过滤器，所述电机前方设有减速箱，所述减速箱内部有输出轴，所述输出轴一端连接有曲轴，所述曲轴的一端连接有一连杆，所述连杆的一端与曲轴连接，另一端连接有一级活塞，所述一级活塞的一端设有一级气缸，另一端连接有二级活塞杆，所述一级气缸的一端设有一级气缸盖，所述一级气缸的外围固定有气缸座，所述一级气缸盖与消音过滤器连接，所述二级活塞杆与一级活塞密封连接，所述二级活塞杆的另一端连接有高压活塞，所述高压活塞一端设有二级气缸，所述二级气缸的一端连接有高压气缸盖，所述高压气缸盖的一端连接有压力限位防爆装置，另一侧通过高压气管与高压过滤器连接。
所述高压过滤器的上方设有压力表，所述高压过滤器的下端设有泄气阀，所述高压过滤器的内部设有油水分离部件，所述高压过滤器一侧设有高压输出口。
所述一级气缸盖与一级气缸之间设有单向阀片。
所述一级活塞内部设有气体储藏室，所述一级活塞一端设有一级单向阀，所述一级活塞上套有导向环。
所述二级活塞杆内部设有气孔，所述气孔的一端与气体储藏室连接，另一端与高压活塞连接。
所述高压活塞内部设有二级单向阀，所述高压气缸盖一侧设有高压单向阀。
所述气缸座与减速箱连接。
所述二级气缸的外部还设有一散热装置。
所述一级活塞的直径面积大于二级活塞杆的直径面积。
所述一级气缸与二级气缸的压缩腔体同轴180°设置。
采用上述技术方案后，本发明有益效果为：该气泵一级与二级气缸为180°同轴设计，工作过程用力均衡，体积小，节能环保，输出气压压力高且密封性好。
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，下面将对实施例或现有技术描述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性的前提下，还可以根据这些附图获得其他的附图。
图1是本发明的结构示意图。
具体实施方式
参看图1所示，本具体实施方式采用的技术方案是：一种高密封二级高压泵，它包括电机6、消音过滤器1和高压过滤器15，所述电机6前方设有减速箱7，所述减速箱7内部有输出轴20，所述输出轴20一端连接有曲轴8，所述曲轴8的一端连接有一连杆9，所述连杆9的一端与曲轴8连接，另一端连接有一级活塞4，所述一级活塞4的一端设有一级气缸3，另一端连接有二级活塞杆19，所述一级气缸3的一端设有一级气缸盖2，所述一级气缸3的外围固定有气缸座21，所述一级气缸盖2与消音过滤器1连接，所述二级活塞杆19与一级活塞4密封连接，所述二级活塞杆19的另一端连接有高压活塞10，所述高压活塞10一端设有二级气缸11，所述二级气缸11的一端连接有高压气缸盖12，所述高压气缸盖12的一端连接有压力限位防爆装置17，另一侧通过高压气管13与高压过滤器15连接。
所述高压过滤器15的上方设有压力表14，所述高压过滤器15的下端设有泄气阀16，所述高压过滤器15的内部设有油水分离部件23，所述高压过滤器一侧设有高压输出口22。
所述一级气缸盖2与一级气缸3之间设有单向阀片31。
所述一级活塞4内部设有气体储藏室18，所述一级活塞4一端设有一级单向阀41，所述一级活塞4上套有导向环42。
所述二级活塞杆19内部设有气孔192，所述气孔192的一端与气体储藏室18连接，另一端与高压活塞10连接。
所述高压活塞10内部设有二级单向阀191，所述高压气缸盖12一侧设有高压单向阀101。
所述气缸座21与减速箱7连接。
所述二级气缸11的外部还设有一散热装置5。
所述一级活塞4的直径面积大于二级活塞杆19的直径面积。
所述一级气缸3与二级气缸11的压缩腔体同轴180°设置。
本发明的工作原理：电机6输出通过减速箱7减速，加大输出扭力。曲轴8采用圆盘曲轴，在高转速时减少震动。曲轴8带动连杆9做活塞运动，气体通过一级气缸盖2上的消音过滤器1进入一级气缸3，一级活塞4压缩后，气体进入气体储藏室18形成中压气体，一部分中压气体再由气体储藏室18通过二级活塞杆内的孔192和高压活塞10进入二级气缸11，高压活塞10压缩时，通过两次压缩产生高压气体通过高压单向阀101止回进入高压过滤器15后由高压输出口22输出。
采用上述技术方案后，本发明有益效果为：该气泵一级与二级气缸为180°同轴设 计，工作过程用力均衡，体积小，节能环保，输出气压压力高且密封性好。
以上所述，仅用以说明本发明的技术方案而非限制，本领域普通技术人员对本发明的技术方案所做的其它修改或者等同替换，只要不脱离本发明技术方案的精神和范围，均应涵盖在本发明的权利要求范围当中。

Claims (10)

  1. 高密封二级高压泵，其特征在于：它包括电机、消音过滤器和高压过滤器，所述电机前方设有减速箱，所述减速箱内部有输出轴，所述输出轴一端连接有曲轴，所述曲轴的一端连接有一连杆，所述连杆的一端与曲轴连接，另一端连接有一级活塞，所述一级活塞的一端设有一级气缸，另一端连接有二级活塞杆，所述一级气缸的一端设有一级气缸盖，所述一级气缸的外围固定有气缸座，所述一级气缸盖与消音过滤器连接，所述二级活塞杆与一级活塞密封连接，所述二级活塞杆的另一端连接有高压活塞，所述高压活塞一端设有二级气缸，所述二级气缸的一端连接有高压气缸盖，所述高压气缸盖的一端连接有压力限位防爆装置，另一侧通过高压气管与高压过滤器连接。
  2. 根据权利要求1所述的高密封二级高压泵，其特征在于：所述高压过滤器的上方设有压力表，所述高压过滤器的下端设有泄气阀，所述高压过滤器的内部设有油水分离部件，所述高压过滤器一侧设有高压输出口。
  3. 根据权利要求1所述的高密封二级高压泵，其特征在于：所述一级气缸盖与一级气缸之间设有单向阀片。
  4. 根据权利要求1所述的高密封二级高压泵，其特征在于：所述一级活塞内部设有气体储藏室，所述一级活塞一端设有一级单向阀，所述一级活塞上套有导向环。
  5. 根据权利要求1所述的高密封二级高压泵，其特征在于：所述二级活塞杆内部设有气孔，所述气孔的一端与气体储藏室连接，另一端与高压活塞连接。
  6. 根据权利要求1所述的高密封二级高压泵，其特征在于：所述高压活塞内部设有二级单向阀，所述高压气缸盖一侧设有高压单向阀。
  7. 根据权利要求1所述的高密封二级高压泵，其特征在于：所述气缸座与减速箱连接。
  8. 根据权利要求1所述的高密封二级高压泵，其特征在于：所述二级气缸的外部还设有一散热装置。
  9. 根据权利要求1所述的高密封二级高压泵，其特征在于：所述一级活塞的直径面积大于二级活塞杆的直径面积。
  10. 根据权利要求1所述的高密封二级高压泵，其特征在于：所述一级气缸与二级气缸的压缩腔体同轴180°设置。
PCT/CN2018/093020 2017-09-11 2018-06-27 高密封二级高压泵 WO2019047592A1 (zh)

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