CN108979993A - A kind of high-pressure bench scale pump group unit shaft flow distribution apparatus - Google Patents
A kind of high-pressure bench scale pump group unit shaft flow distribution apparatus Download PDFInfo
- Publication number
- CN108979993A CN108979993A CN201810722811.0A CN201810722811A CN108979993A CN 108979993 A CN108979993 A CN 108979993A CN 201810722811 A CN201810722811 A CN 201810722811A CN 108979993 A CN108979993 A CN 108979993A
- Authority
- CN
- China
- Prior art keywords
- valve
- control
- pump housing
- way valve
- fluid
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
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
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
-
- 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
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
- F04B1/0404—Details or component parts
- F04B1/0448—Sealing means, e.g. for shafts or housings
-
- 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
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
- F04B1/06—Control
-
- 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
- F04B53/10—Valves; Arrangement of valves
Abstract
A kind of high-pressure bench scale pump group unit shaft flow distribution apparatus, including matching streaming system, shuttle valve component, fluid-control one-way valve module, spill valve embedded in the intracorporal axis of pump, the present invention using on miniaturization Integrated design advantageously and the more stable axis flow distribution radial plunger pump pattern of operating, it proposes each micro valve and hydraulic medium runner carrying out integral fusion design concept embedded in pump body, to realize that pump group unit small-sized is integrated；Meanwhile optimizing pump group unit shaft flow system structure and dimensional fits relationship, it effectively solves the problems, such as to leak phenomenon in pintle force unbalance and pump group unit in hyperbaric environment, promotes pump group cell operation efficiency and service life.
Description
Technical field
The present invention relates to a kind of high-pressure bench scale pump group unit shaft flow distribution apparatus.
Background technique
Critical component of the electro-hydraulic remote control valve as auxiliary system mainly passes through minitype motor driving pump group unit
Bidirectional hydraulic power output is realized in rotation, to control the working condition of electro-hydraulic remote control valve, and can quick accurate perception system pipes
The motion states such as road fluid flow, flow velocity and flow direction.Pump group unit is the important link that electro-hydraulic remote control valve realizes kinetic energy output,
In view of the particularity of marine environment, and existing hydraulic pump volume weight is big, oil circuit is external, fits ship deficiency, Bu Nengman
Sufficient marine system device future miniaturization, lightweight, integrated, intelligentized growth requirement.
Summary of the invention
Its purpose of the invention, which is that, provides a kind of high-pressure bench scale pump group unit shaft flow distribution apparatus, solves existing hydraulic
Pump volume weight is big, oil circuit is external, fits ship deficiency, is not able to satisfy the future miniaturization of marine system device, lightweight, integrates
Change, intelligentized growth requirement problem.
It adopts the technical scheme that achieve the above object, a kind of high-pressure bench scale pump group unit shaft flow distribution apparatus, including
Match streaming system, shuttle valve component, fluid-control one-way valve module, spill valve embedded in intracorporal axis is pumped, the axis includes with streaming system
Flow shaft assembly and rotor assembly, rotor assembly include copper sheathing, rotor and plunger, and flow shaft assembly one end is installed on rotor assembly
In inner hole, and the copper sheathing clearance fit with rotor assembly, internal rotor is radially uniform to be equipped with plunger cavity, and plunger is placed in plunger cavity
Interior, rotor assembly one end is equipped with shaft coupling, and rotor outer sheath is equipped with stator bearing, and stator bearing one end is equipped with eccentric pressure
Set is equipped with " O " type sealing ring between eccentric pressing sleeve and micromotor；The shuttle valve component includes shuttle valve plug, pump housing two sides
One end of shuttle valve plug be respectively equipped with shuttle valve spool and shuttle valve nut, between the shuttle valve plug and the pump housing of the pump housing two sides
Equipped with shuttle valve gasket seal, shuttle valve spool and shuttle valve nut thread are connected and installed in pump body；The fluid-control one-way valve module
Including the hydraulic control one-way valve plug that pump housing two sides are arranged symmetrically, fluid-control one-way valve module position among the pump housing is equipped with 2# hydraulic control
Inner elements of check valve, one end of hydraulic control one-way valve plug are connected with fluid-control one-way valve sealing gasket, hydraulic control one-way valve compression bullet in turn
Spring, hydraulic stifled ball and 1# fluid-control one-way valve core；The spill valve includes overflow valve plug, and one end of overflow valve plug is set
There is relief valve spool, overflow valve compressed spring is equipped between overflow valve plug and relief valve spool.
Beneficial effect
The present invention has the following advantages that compared with prior art.
1. advantageously and operating more stable axis flow distribution radial plunger pump pattern on use miniaturization Integrated design, mention
Each micro valve and hydraulic medium runner are subjected to integral fusion design concept embedded in pump body out, to realize pump group unit
Small integrated；
2. optimize pump group unit shaft flow system structure and dimensional fits relationship, effectively solve in hyperbaric environment pintle by
Phenomenon is leaked in power disequilibrium problem and pump group unit, promotes pump group cell operation efficiency and service life；
3. the device structure is arranged symmetrically, built-in oil circuit layout is simplified, the integrated trend of miniaturization is higher, reliable working performance,
Volumetric efficiency is more excellent, easy for installation, it can be achieved that Seriation Design, meets the needs of ship different application, has two-way liquid
The functions such as pressure power output, self-locking, the safety overflow control of bidirectional hydraulic.
Detailed description of the invention
Below in conjunction with attached drawing, the invention will be further described.
Fig. 1 is decomposition diagram of the invention；
Fig. 2 is outline structural diagram of the invention；
Fig. 3 is axis flow system schematic of the invention；
Fig. 4 is one schematic diagram of micro valve of the invention；
Fig. 5 is two schematic diagram of micro valve of the invention；
Fig. 6 is the working principle of the invention figure.
Specific embodiment
A kind of high-pressure bench scale pump group unit shaft flow distribution apparatus of the present apparatus matches streaming system, shuttle valve including the axis in the pump housing 1
Component, fluid-control one-way valve module, spill valve, as Figure 1-Figure 5, the axis include 2 He of flow shaft assembly with streaming system
Rotor assembly, rotor assembly include copper sheathing 3, rotor 4 and plunger 5, and 2 one end of flow shaft assembly is installed in rotor assembly inner hole,
And with 3 clearance fit of the copper sheathing of rotor assembly, 4 inner radial of rotor is uniformly provided with plunger cavity, and plunger 5 is placed in plunger cavity, turns
Sub-component one end is equipped with shaft coupling 9, and 4 outer sheath of rotor is equipped with stator bearing 6, and described 6 one end of stator bearing is equipped with eccentric pressing sleeve
7, " O " type sealing ring 8 is equipped between eccentric pressing sleeve 7 and micromotor；The shuttle valve component includes shuttle valve plug 19, and 1 liang of the pump housing
One end of the shuttle valve plug 19 of side is respectively equipped with shuttle valve spool 21 and shuttle valve nut 22, and the shuttle valve of 1 two sides of the pump housing is stifled
Shuttle valve gasket seal 20 is equipped between first 19 and the pump housing 1, shuttle valve spool 21 is threadedly coupled with shuttle valve nut 22 and is installed in the pump housing 1
Portion；The fluid-control one-way valve module includes the hydraulic control one-way valve plug 13 that 1 two sides of the pump housing are arranged symmetrically, fluid-control one-way valve module
It is equipped with 2# fluid-control one-way valve core 18 in the intermediate position of the pump housing 1, one end of hydraulic control one-way valve plug 13 is connected with hydraulic control list in turn
To valve sealing gasket 14, hydraulic control one-way valve compressed spring 15, hydraulic stifled ball 16 and 1# fluid-control one-way valve core 17；The overflow valve
Component includes overflow valve plug 10, and one end of overflow valve plug 10 is equipped with relief valve spool 12, overflow valve plug 10 and overflow valve
Overflow valve compressed spring 11 is equipped between spool 12.
The stator bearing 6 is eccentrically mounted inside the pump housing 1 relative to rotor 4, and copper sheathing 3 is embedded in 4 inner hole of rotor, flow
One end of shaft assembly 2 and the pump housing 1 are interference fitted, the other end and 3 clearance fit of copper sheathing of flow shaft assembly 2.
The shuttle valve plug 19 and shuttle valve gasket seal 20 are symmetrically arranged in 1 two sides of the pump housing, shuttle valve spool 21 and shuttle in groups
It is installed on inside the pump housing 1 between valve nut 22 through being threadedly coupled, and can be in pump body side-to-side movement according to rotor rotation direction；
When work, operating of the combined axis with streaming system is so that shuttle valve component one end forms hydraulic medium access, the other end and the pump housing 1
The conical surface fits closely sealing, realizes the output of hydraulic medium Bidirectional power.
It is the hydraulic control one-way valve plug 13, fluid-control one-way valve sealing gasket 14, hydraulic control one-way valve compressed spring 15, hydraulic stifled
Ball 16 and 1# fluid-control one-way valve core 17 are symmetrically arranged in pump housing two sides in groups；The 2# fluid-control one-way valve core 18 is installed on pump
Inside body 1,1# fluid-control one-way valve core 17 is equipped with oil outlet, and oil outlet is communicated with oil circuit built in the pump housing 1；The hydraulic stifled ball
16 fit on the sealing cone of 1# fluid-control one-way valve core 17 under the effect of hydraulic control one-way valve compressed spring 15.
In the present invention, the shuttle valve component, fluid-control one-way valve module and spill valve are embedded in pump body, so that whole
The dimensional structure of a pump group unit is more compact and minimizes.Hydraulic medium is flowed to inside pump group unit and is gated by each miniature valve
System.
Axis with streaming system be both energy conversion device and pump group unit kinetic energy output driving device, through shaft coupling with
Micromotor is connected.It specifically includes that flow shaft assembly 2 and rotor assembly, and rotor assembly is by copper sheathing 3, rotor 4, plunger 5 and determines
Sub- bearing 6 is constituted.Copper sheathing 3 is embedded in 4 inner hole of rotor using cold setting method, generates when reducing working rotor with pintle inter-module
Frictional resistance；Cause pressure that can not establish and maintain the oil film ring in plunger cavity to avoid pump group unit from interior leakage phenomenon occur
Border, plunger 5 and a pair of of precision pair of the plunger cavity as high-pressure bench scale pump group unit, cooperate precision should control+
Within 0.015mm.It is interference fitted between flow shaft assembly one end and the pump housing, the other end and copper sheathing clearance fit cooperate precision controlling
Within+0.010mm；A pair of of circular hole (not through) is set on the cylindrical surface at flow shaft assembly and pump housing cooperation, respectively with pump
Body two sides oil circuit communicates；It slots on the flow shaft assembly cylindrical surface contacted with plunger cavity, increases the contact surface with plunger cavity,
Promote the suction oil effect of pump group unit.It is passed through between grooved bore on flow shaft assembly cylindrical surface and pintle component internal oilhole
The axial fabrication hole that its end face opens up is connected.Stator bearing and rotor relative eccentric are installed on pump body, and outside stator bearing
Circle is compressed by eccentric pressing sleeve.
Motion state control hydraulic medium flow direction of the shuttle valve component according to axis with streaming system, is that pump group unit bidirectional hydraulic is dynamic
The key link of power output.It specifically includes that shuttle valve plug 19, shuttle valve gasket seal 20, shuttle valve spool 21, shuttle valve nut 22.
Shuttle valve spool is built in pump body through being threadedly coupled with shuttle valve nut, can control in the pump housing under the action of axis matches streaming system
Movement, side and pump housing oil circuit form access, the other side and pump housing conical surface gluing, sealing.
Fluid-control one-way valve module is the end component of pump group unit control hydraulic medium flow direction, is that pump group unit realizes two-way
Hydraulic self-locking key.It specifically includes that hydraulic control one-way valve plug 13, fluid-control one-way valve sealing gasket 14, hydraulic control one-way valve pressure
Contracting spring 15, hydraulic stifled ball 16,1# fluid-control one-way valve core 17,2# fluid-control one-way valve core 18.2# fluid-control one-way valve core cloth
It sets in the middle part of pump group unit, it is hydraulic control one-way valve plug, fluid-control one-way valve sealing gasket, hydraulic control one-way valve compressed spring, hydraulic stifled
Ball, 1# fluid-control one-way valve core are symmetrically arranged in pump group unit two sides in groups.It is opened on cylindrical surface the fluid-control one-way valve core front 1#
If the hole communicated with pump housing oil circuit, the ground processing of sealing surface at 1# fluid-control one-way valve core inner hole, in hydraulic control one-way valve pressure
Sealed environment is formed with hydraulic stifled ball under the action of contracting spring.When pump group cell operation, hydraulic medium oil circuit stream as built in the pump housing
It is opened hydraulic stifled ball at fluid-control one-way valve module to export to next moving cell, while 2# fluid-control one-way valve core is in hydraulic Jie
The hydraulic stifled ball in the other side is pushed open under matter effect, the hydraulic medium exported by next moving cell is received, thus in entire pump group list
First internal formation oil circuit closed-loop control.
The component that spill valve is protected as the superpressure safety overflow of pump group unit, specifically includes that overflow valve plug
10, overflow valve compressed spring 11, relief valve spool 12.Pump group unit can be controlled by the pretightning force of regulation relief valve compressed spring
Make its oil pressure relief.
The working principle of the invention is: as shown in fig. 6, when micromotor receives tele-control system or local control box
When instruction forward direction work, driving rotates in same direction with the pump group unit rotor that it is connected through shaft coupling；At this point, plunger turns with rotor
It moves and moves back and forth in plunger cavity, plunger cavity is respectively formed oil sucting cavity and pumping cavity at left and right sides of rotor；Shuttle valve spool to
Side movement, seals shuttle valve other side oil circuit；Hydraulic medium enters rotor oil sucting cavity through shuttle valve access, flow shaft assembly, then by
Rotor pumping cavity and flow shaft assembly and by pump group unit side hydraulic control one-way valve through pump group unit bottom oil outlet to next
Moving cell；Meanwhile 2# fluid-control one-way valve core 18 move to opposite side under hydraulic medium effect and pushes that the other side is hydraulic to be blocked up open
Ball forms oil circuit closed-loop control.When micromotor reverse operation, working principle is similar.The high-pressure bench scale pump group unit is main
It is each micro valve and hydraulic circuit to be built in pump body to realize small integrated, and establish high pressure with streaming system by axis
Environment, in conjunction with the function control hydraulic medium flow direction of fluid-control one-way valve module, shuttle valve component and spill valve and superpressure overflow
Protecting effect.
Claims (4)
1. a kind of high-pressure bench scale pump group unit shaft flow distribution apparatus, including the axis in the pump housing (1) with streaming system, shuttle valve component,
Fluid-control one-way valve module, spill valve, which is characterized in that the axis includes flow shaft assembly (2) and rotor set with streaming system
Part, rotor assembly include copper sheathing (3), rotor (4) and plunger (5), and flow shaft assembly (2) one end is installed on rotor assembly inner hole
In, and with the copper sheathing of rotor assembly (3) clearance fit, rotor (4) inner radial is uniformly provided with plunger cavity, and plunger (5) is placed in column
Fill in it is intracavitary, rotor assembly one end be equipped with shaft coupling (9), rotor (4) outer sheath be equipped with stator bearing (6), the stator bearing (6)
One end is equipped with eccentric pressing sleeve (7), and " O " type sealing ring (8) is equipped between eccentric pressing sleeve (7) and micromotor；The shuttle valve component
Including shuttle valve plug (19), one end of the shuttle valve plug (19) of the pump housing (1) two sides is respectively equipped with shuttle valve spool (21) and shuttle valve
Nut (22) is equipped with shuttle valve gasket seal (20) between the shuttle valve plug (19) and the pump housing (1) of the pump housing (1) two sides, shuttle
Valve core (21) is threadedly coupled with shuttle valve nut (22) is installed on the pump housing (1) inside；The fluid-control one-way valve module includes the pump housing
(1) the hydraulic control one-way valve plug (13) that two sides are arranged symmetrically, fluid-control one-way valve module are equipped with 2# liquid in the intermediate position of the pump housing (1)
It controls inner elements of check valve (18), one end of hydraulic control one-way valve plug (13) is connected with fluid-control one-way valve sealing gasket (14), liquid in turn
Control one-way valve compression spring (15), hydraulic stifled ball (16) and 1# fluid-control one-way valve core (17)；The spill valve includes overflowing
It flows valve plug head (10), one end of overflow valve plug (10) is equipped with relief valve spool (12), overflow valve plug (10) and overflow valve valve
Overflow valve compressed spring (11) are equipped between core (12).
2. a kind of high-pressure bench scale pump group unit shaft flow distribution apparatus according to claim 1, which is characterized in that the stator axis
Hold that (6) are eccentrically mounted internal in the pump housing (1) relative to rotor (4), and copper sheathing (3) is embedded in rotor (4) inner hole, flow shaft assembly
(2) one end and the pump housing (1) is interference fitted, the other end and copper sheathing (3) clearance fit of flow shaft assembly (2).
3. a kind of high-pressure bench scale pump group unit shaft flow distribution apparatus according to claim 1, which is characterized in that the shuttle valve is stifled
Head (19) and shuttle valve gasket seal (20) are symmetrically arranged in the pump housing (1) two sides in groups, shuttle valve spool (21) and shuttle valve nut (22)
Between be threadedly coupled that be installed on the pump housing (1) internal, and can be in pump body side-to-side movement according to rotor rotation direction；Work
When, so that shuttle valve component one end forms hydraulic medium access, the other end and the pump housing (1) are bored for operating of the combined axis with streaming system
Face fits closely sealing, realizes the output of hydraulic medium Bidirectional power.
4. a kind of high-pressure bench scale pump group unit shaft flow distribution apparatus according to claim 1, which is characterized in that the hydraulic control list
To valve plug head (13), fluid-control one-way valve sealing gasket (14), hydraulic control one-way valve compressed spring (15), hydraulic stifled ball (16) and 1# liquid
Control inner elements of check valve (17) is symmetrically arranged in pump housing two sides in groups；The 2# fluid-control one-way valve core (18) is installed on the pump housing (1)
Inside, 1# fluid-control one-way valve core (17) are equipped with oil outlet, and oil outlet is communicated with oil circuit built in the pump housing (1)；It is described hydraulic stifled
Ball (16) fits on the sealing cone of 1# fluid-control one-way valve core (17) in the case where hydraulic control one-way valve compressed spring (15) act on.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810722811.0A CN108979993A (en) | 2018-07-04 | 2018-07-04 | A kind of high-pressure bench scale pump group unit shaft flow distribution apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810722811.0A CN108979993A (en) | 2018-07-04 | 2018-07-04 | A kind of high-pressure bench scale pump group unit shaft flow distribution apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108979993A true CN108979993A (en) | 2018-12-11 |
Family
ID=64536073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810722811.0A Pending CN108979993A (en) | 2018-07-04 | 2018-07-04 | A kind of high-pressure bench scale pump group unit shaft flow distribution apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108979993A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1699749A (en) * | 2004-05-18 | 2005-11-23 | 卢堃 | Swing angle type radial plunger variable pump |
| CN201531384U (en) * | 2009-09-29 | 2010-07-21 | 上海融德机电工程设备有限公司 | Hydraulic hand-operated pump used for driving hydraulic actuating element |
| CN202579414U (en) * | 2012-05-29 | 2012-12-05 | 特福隆集团有限公司 | Hydraulic combined valve |
| CN204921518U (en) * | 2015-08-31 | 2015-12-30 | 南通航海机械集团有限公司 | Miniature power pack of marine electrohydraulic valve |
| CN108150374A (en) * | 2017-12-22 | 2018-06-12 | 赛克思液压科技股份有限公司 | The axis distributing construction and closed type hydraulic pump of a kind of closed type hydraulic pump |
-
2018
- 2018-07-04 CN CN201810722811.0A patent/CN108979993A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1699749A (en) * | 2004-05-18 | 2005-11-23 | 卢堃 | Swing angle type radial plunger variable pump |
| CN201531384U (en) * | 2009-09-29 | 2010-07-21 | 上海融德机电工程设备有限公司 | Hydraulic hand-operated pump used for driving hydraulic actuating element |
| CN202579414U (en) * | 2012-05-29 | 2012-12-05 | 特福隆集团有限公司 | Hydraulic combined valve |
| CN204921518U (en) * | 2015-08-31 | 2015-12-30 | 南通航海机械集团有限公司 | Miniature power pack of marine electrohydraulic valve |
| CN108150374A (en) * | 2017-12-22 | 2018-06-12 | 赛克思液压科技股份有限公司 | The axis distributing construction and closed type hydraulic pump of a kind of closed type hydraulic pump |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106837725B (en) | two-dimensional axial plunger pump | |
| CN106894962A (en) | A kind of high-pressure high-flow hydraulic planger pump | |
| CN101131152A (en) | Constant-pressure variable radial-plunger pump | |
| CN209781143U (en) | Axial plunger pump | |
| CN103573618B (en) | A kind of car variable-displacement power steering pump | |
| CN103233873A (en) | External-rotor radial plunger hydraulic pump integrated with motors | |
| CN115898748B (en) | Radial plunger hydraulic device for controlling double-valve flow distribution by using single-group oil way and working method | |
| CN112377382B (en) | Variable axial plunger pump based on proportional pressure reducing valve control | |
| CN108979993A (en) | A kind of high-pressure bench scale pump group unit shaft flow distribution apparatus | |
| CN108194454A (en) | A kind of oil pump and oil cylinder integrated apparatus of AC servomotor driving | |
| CN203285640U (en) | Auxiliary pump type plunger pump with flow distributed by valve | |
| CN106593730B (en) | A kind of high-pressure common rail variable pump testing pressure-regulating valve | |
| CN214660668U (en) | Large-traffic compact electricity liquid all-in-one | |
| CN110939565B (en) | External gear pump and electric lubricating oil pump | |
| CN108425820A (en) | A kind of cam-type axial piston pump of included slippage pump | |
| CN212690331U (en) | External gear pump and electric lubricating oil pump | |
| CN108999817B (en) | Hydraulic pressure transformation method | |
| CN207111332U (en) | A kind of ship hand steering gear novel plunger-type self-lock manual pump | |
| CN103114994B (en) | A kind of Vane-type hydraulic machine | |
| CN104895754B (en) | An axial plunger and radial plunger combined hydraulic pump | |
| CN110836208A (en) | Unloading stop valve | |
| CN206753835U (en) | A kind of manual pump high/low pressure conversion device | |
| CN201627718U (en) | Built-in variable-speed pump | |
| CN111980632B (en) | Reciprocating oil pumping device of submersible motor | |
| CN219993853U (en) | Auxiliary pressure oil output mechanism |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20181211 |
|
| WD01 | Invention patent application deemed withdrawn after publication |