CN108167261A - A kind of hydraulic reciprocating driving mechanism and hydraulic reciprocating transfer tube - Google Patents
A kind of hydraulic reciprocating driving mechanism and hydraulic reciprocating transfer tube Download PDFInfo
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- CN108167261A CN108167261A CN201711170432.7A CN201711170432A CN108167261A CN 108167261 A CN108167261 A CN 108167261A CN 201711170432 A CN201711170432 A CN 201711170432A CN 108167261 A CN108167261 A CN 108167261A
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- pressure chamber
- hydraulic pressure
- segment
- piston
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
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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
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/02—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having two cylinders
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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
- F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
- F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
- F04B9/10—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid
- F04B9/109—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1447—Pistons; Piston to piston rod assemblies
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/202—Externally-operated valves mounted in or on the actuator
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Details Of Reciprocating Pumps (AREA)
- Reciprocating Pumps (AREA)
Abstract
The invention discloses a kind of hydraulic reciprocating driving mechanism and hydraulic reciprocating transfer tube, hydraulic reciprocating driving mechanism includes：Piston shell, piston shell is interior to be equipped with hydraulic pressure chamber；Piston, piston are arranged in the hydraulic pressure chamber of piston shell, and hydraulic pressure chamber is separated into the first hydraulic pressure chamber, the second hydraulic pressure chamber and third hydraulic pressure chamber；Hydraulic system, hydraulic system are passed through low pressure liquid to first hydraulic pressure chamber, are passed through highly pressurised liquid to the second hydraulic pressure chamber, hydraulic system may be actuated into：Under first default operating mode, low pressure liquid is passed through in third hydraulic pressure chamber, piston is moved to first direction；Under second default operating mode, highly pressurised liquid is passed through in third hydraulic pressure chamber, piston is moved to second direction, and second direction is opposite with first direction.The hydraulic reciprocating driving mechanism of the present invention and hydraulic reciprocating transfer tube, it is compact-sized, it is small, light-weight, and type of drive is simple, it can realize automatic reverse, few easy workout part, operating cost is low.
Description
Technical field
The present invention relates to the structure-design technique field of pump, a kind of hydraulic reciprocating driving mechanism and hydraulic reciprocating transfer tube.
Background technology
At present in reciprocating pump application field, most popular is three cylinder single-acting piston type reciprocating pumps.Fig. 1 and Fig. 2
It is three cylinder single action piston pump fundamental diagrams being widely used at present.Under the driving in Fig. 1 right side powers source, the three of reciprocating pump
A piston H does bilateral reciprocation in out of phase."T"-shaped element in figure is check valve D, and check valve D can be with piston H
Movement is automatically turned on or is closed.Three cylinder single-acting reciprocating pumps of this structure are the motion principle using crankshaft-link rod mostly,
Can not use hydraulic-driven, can not automatic reverse, complicated in mechanical structure, bulky, mechanical efficiency is low, moving component is easy
Abrasion, maintenance cost are high.
Therefore, the applicant is dedicated to providing a kind of hydraulic reciprocating driving mechanism and hydraulic reciprocating transfer tube.
Invention content
The object of the present invention is to provide a kind of hydraulic reciprocating driving mechanism and hydraulic reciprocating transfer tube, simple in structure, bodies
Product is small, and its type of drive is simple, and mechanical efficiency is high.
Technical solution provided by the invention is as follows：
A kind of hydraulic reciprocating driving mechanism, including：Piston shell, the piston shell is interior to be equipped with hydraulic pressure chamber；Piston, the piston
It is arranged in the hydraulic pressure chamber of the piston shell, and the hydraulic pressure chamber is separated into the first hydraulic pressure chamber, the second hydraulic pressure chamber and third liquid
Pressure chamber；Hydraulic system, the hydraulic system are passed through low pressure liquid to first hydraulic pressure chamber, and height is passed through to second hydraulic pressure chamber
Press liquid, the hydraulic system may be actuated into：Under first default operating mode, low pressure liquid is passed through in the third hydraulic pressure chamber, it is described
Piston is moved to first direction；Under second default operating mode, it is passed through highly pressurised liquid in the third hydraulic pressure chamber, the piston is to second
Direction is moved, and the second direction is opposite to the first direction.
Preferably, first hydraulic pressure chamber, the second hydraulic pressure chamber and third hydraulic pressure chamber are set gradually, the second hydraulic pressure chamber position
Between first hydraulic pressure chamber and third hydraulic pressure chamber；The first direction is directed toward the side of the second hydraulic pressure chamber for the first hydraulic pressure chamber
To the second direction is directed toward the direction of first hydraulic pressure chamber for the second hydraulic pressure chamber.
Preferably, the piston includes the first service portion arranged successively, the first driving portion, the second driving portion and the second work
With portion, wherein the radial dimension of first service portion, first driving portion and second driving portion successively increases, it is described
First service portion is identical with the radial dimension of second service portion；The hydraulic pressure chamber of the piston shell is first to arrange successively
Section, second segment, third section, the 4th section and the 5th section, the radial dimension of the third section are less than the second segment and the 4th section；Institute
The sealing of the first driving portion is stated to be slidedly arranged at the third section of the hydraulic pressure chamber, and the second segment and described 4th section are separated, institute
Second segment is stated as the first chamber；The second driving portion sealing is slidedly arranged at the 4th section of the hydraulic pressure chamber, and by described in
4th section is divided into the second chamber and third chamber；The first service portion sealing is slidedly arranged on the first segment of the hydraulic pressure chamber
Place, the second service portion sealing are slidedly arranged at the 5th section of the hydraulic pressure chamber.
Preferably, the hydraulic system includes low pressure liquid output terminal and highly pressurised liquid output terminal, and the low pressure liquid is defeated
Outlet is directly connected with first hydraulic pressure chamber, and the highly pressurised liquid output terminal is directly connected with second hydraulic pressure chamber.
Preferably, the hydraulic system further includes two position three-way valve, and the two position three-way valve includes and first hydraulic pressure
The first hydraulic fluid port, the second hydraulic fluid port connected with second hydraulic pressure chamber and the third connected with the third sub-chamber the oil of room connection
Mouthful；Under first default operating mode, first hydraulic fluid port is connected with third hydraulic fluid port；Under second default operating mode, second hydraulic fluid port and
Three hydraulic fluid ports connect.
Preferably, the two position three-way valve is located at the inside of the piston, and the piston is equipped with the first oil circuit, the second oil
Road and third oil circuit；The Single port of first oil circuit is connected with first hydraulic pressure chamber, another port and first hydraulic fluid port
Connection；The Single port of second oil circuit is connected with second hydraulic pressure chamber, and another port is connected with second hydraulic fluid port；It is described
The Single port of third oil circuit is connected with the third hydraulic pressure chamber, and another port is connected with the third hydraulic fluid port.
Preferably, the two position three-way valve includes valve casing and spool；The spool includes fixed part and sliding part, the cunning
Dynamic portion includes the first segment arranged successively along the first direction, second segment, third section and the 4th section, the first segment of the sliding part,
Second segment and the outer diameter of third section are gradually reduced, and the 4th section of outer diameter of the second segment of the sliding part and its is equal, the slip
Ladder hole is equipped in portion, the aperture of the first segment of the ladder hole is more than the aperture of its second segment, the ladder hole edge
The first segment through-hole sealing of first direction is slidedly arranged on the outside of the fixed part；The internal chamber of the valve casing is included along first party
To the first segment and second segment arranged successively, the radial dimension of the first segment of the valve casing is more than its second segment, the valve casing
First segment and second segment are located at the both sides of first hydraulic fluid port, and second hydraulic fluid port and described is equipped at the second segment of the valve casing
Third hydraulic fluid port；The first segment sealing of the sliding part is slidedly arranged on the first segment of the valve casing, the second segment of the sliding part and the
Four sections seal the second segment for being slidedly arranged on the valve casing.
The piston is equipped with the 4th oil circuit, and the second segment of the valve casing is equipped with the 4th hydraulic fluid port, the 4th oil circuit
Single port is connected with second hydraulic pressure chamber, and another port is connected with the 4th hydraulic fluid port, and the 4th oil circuit is with being located at institute
The internal chamber for stating the valve casing of the side of spool connects always；The piston is equipped with the 5th oil circuit, the first segment of the valve casing
The 5th hydraulic fluid port is equipped with, the Single port of the 5th oil circuit is connected with the 5th hydraulic fluid port；When the other end of the 5th oil circuit
When mouth is connected with first hydraulic pressure chamber, the sliding part moves in a second direction, and first hydraulic fluid port is connected with third hydraulic fluid port；
When the another port of the 5th oil circuit is connected with second hydraulic pressure chamber, the sliding part moves along the first direction, described
Second hydraulic fluid port is connected with third hydraulic fluid port.
The invention also discloses a kind of hydraulic reciprocating pump, including：Above-mentioned hydraulic reciprocating driving mechanism；Pump case is arranged on institute
The outside of piston shell is stated, is internally provided with the first working chamber, and the first end of the piston acts on first working chamber；The
Under one default operating mode, first working chamber sucks working fluid；Under second default operating mode, first working chamber discharges work
Liquid.
Preferably, first working chamber is equipped with the first check valve and the second check valve, first check valve and institute
State the not homonymy that the second check valve is arranged on first working chamber；Under first default operating mode, first check valve is opened, institute
State the second closed check valve；Under second default operating mode, first closed check valve, second check valve is opened.
Preferably, the second working chamber is additionally provided in the pump case, second working chamber and first working chamber are symmetrical
Setting, the second end of the piston act on second working chamber；Under first default operating mode, second working chamber discharges work
Make liquid；Under second default operating mode, second working chamber sucks working fluid, and it is unidirectional that second working chamber is equipped with third
Valve and the 4th check valve, the third check valve and the 4th check valve are separately positioned on the difference of second working chamber
Side, and the third check valve and the first check valve are located at the same side, the 4th check valve and the second check valve are located at same
Side；Under first default operating mode, the third closed check valve, the 4th check valve is opened；Under the described second default operating mode,
The third check valve is opened, the 4th closed check valve.
A kind of hydraulic reciprocating driving mechanism and hydraulic reciprocating transfer tube provided by the invention can bring following at least one
Advantageous effect：
1st, hydraulic reciprocating driving mechanism of the invention is passed through low pressure always into the first hydraulic pressure chamber respectively by hydraulic system
Liquid is passed through highly pressurised liquid always into the second hydraulic pressure chamber, and low pressure liquid and highly pressurised liquid are each led into third hydraulic pressure chamber
When piston can be made to be moved to two different directions, and current hydraulic reciprocating driving mechanism be by same hydraulic pressure chamber input
The hydraulic oil of different pressures, so as to fulfill the movement of piston, this control mode is relatively complicated, hydraulic reciprocating of the invention driving
Mechanism structure is fixed there are two the hydraulic oil being passed through in hydraulic pressure chamber, and the hydraulic pressure chamber that only third hydraulic pressure chamber is passed through is variable
, therefore, drive control mode of the invention is more simple.
2nd, in the present invention, the first hydraulic pressure chamber, the second hydraulic pressure chamber and third hydraulic pressure chamber are set gradually, wherein only third hydraulic pressure chamber
It is different so as to be generated between three hydraulic pressure chambers by adjusting the pressure of hydraulic oil in third hydraulic pressure chamber for a hydraulic variable room
The thrust in direction promotes piston to be moved to both direction.
3rd, in the present invention, piston and piston shell be set as the different step structure of diameter, so that it is determined that the hydraulic pressure of piston
Stress surface, under specific piston structure, as long as the oil pressure in the first hydraulic pressure chamber is less than the oil pressure in the second hydraulic pressure chamber, third liquid
Low pressure oil is passed through in pressure chamber or high pressure oil determines that piston is moved to two different directions, that is to say, that the end face of piston
The face area ratio value size of area and piston shell determines the running parameter of hydraulic reciprocating driving mechanism, therefore, can basis
Different application scene, different user or different application operating mode etc. design the size of aforementioned proportion value, to reach this product most
While Optimization Work efficiency, personalized and different operating parameter this product seriation and mass production can be also carried out.
4th, in the present invention, hydraulic system adjusts the hydraulic oil being passed into third hydraulic pressure chamber by a two position three-way valve,
Two position three-way valve may be disposed at outside piston shell, and the external structure of reversal valve can individually carry out module design, be easily changed.
5th, in the present invention, hydraulic system adjusts the hydraulic oil being passed into third hydraulic pressure chamber by a two position three-way valve,
Two position three-way valve can also be set to internal piston, so as to make the structure of head office more compact, occupy volume smaller, and safety
Performance is more preferable.
6th, in the present invention, when two position three-way valve is set on internal piston, set what is connected with two position three-way valve on piston
Oil circuit, and the hydraulic fluid port connected with hydraulic pressure chamber is set, when the piston is moving, the hydraulic fluid port and the first hydraulic pressure chamber or the second hydraulic pressure chamber connect
It is logical, so as to drive the switching of two position three-way valve, the switching of the moving direction of piston is further controlled, so as to fulfill the automatic of piston
Reciprocating reversing, in this way setting further simplify the control mode of driving mechanism.
Description of the drawings
Below by a manner of clearly understandable, preferred embodiment is described with reference to the drawings, above-mentioned characteristic, skill to the present invention
Art feature, advantage and its realization method are further described.
Fig. 1 is the front view of three existing cylinder single action piston pump operation principles；
Fig. 2 is the vertical view of three cylinder single action piston pump operation principles shown in Fig. 1；
Fig. 3 is that the hydraulic reciprocating driving mechanism of the present invention and a kind of specific embodiment of hydraulic reciprocating transfer tube are pre- first
If the operation principle schematic diagram under operating mode；
Fig. 4 is the work of hydraulic reciprocating driving mechanism and hydraulic reciprocating transfer tube under the second default operating mode shown in Fig. 3
Make principle schematic；
Fig. 5 is that work of the two position three-way valve under the first default operating mode is former in hydraulic reciprocating driving mechanism shown in Fig. 3
Manage schematic diagram；
Fig. 6 is that work of the two position three-way valve under the second default operating mode is former in hydraulic reciprocating driving mechanism shown in Fig. 4
Manage schematic diagram；
Fig. 7 is the knot of hydraulic reciprocating driving mechanism and hydraulic reciprocating transfer tube under the first default operating mode shown in Fig. 3
Structure schematic diagram；
Fig. 8 is the knot of hydraulic reciprocating driving mechanism and hydraulic reciprocating transfer tube shown in fig. 7 under the second default operating mode
Structure schematic diagram.
Drawing reference numeral explanation：
Piston shell 1, the first hydraulic pressure chamber A', low-pressure port T, the second hydraulic pressure chamber B', high pressure port P, third hydraulic pressure chamber C' are living
Plug 2, the first service portion 21, the first driving portion 22, the second driving portion 23, the second service portion 24, two position three-way valve 3, valve casing 31, the
One hydraulic fluid port A, the second hydraulic fluid port B, third hydraulic fluid port C, the 5th hydraulic fluid port F, spool 32, fixed part 321, sliding part 322, pump case 4, the first work
Make chamber 41, the second working chamber 42, the first check valve 43, cavity 51 of intaking, water outlet cavity 52.
The direction of motion of piston or spool；
The circulating direction of highly pressurised liquid；
The circulating direction of low pressure liquid；
The circulating direction of working fluid。
Specific embodiment
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, control is illustrated below
The specific embodiment of the present invention.It should be evident that the accompanying drawings in the following description is only some embodiments of the present invention, for
For those of ordinary skill in the art, without creative efforts, other are can also be obtained according to these attached drawings
Attached drawing, and obtain other embodiments.To make simplified form, only schematically showing and phase of the present invention in each figure
The part of pass, they do not represent its practical structures as product.
As shown in Figure 3 and Figure 4, this specific embodiment discloses a kind of hydraulic reciprocating driving mechanism, packet piston shell 1, piston 2
And hydraulic system (not shown), piston shell 1 is interior to be equipped with hydraulic pressure chamber, and piston 2 is arranged in the hydraulic pressure chamber of piston shell 1, and will
Hydraulic pressure chamber is separated into the first hydraulic pressure chamber A' set gradually from left to right, the second hydraulic pressure chamber B' and third hydraulic pressure chamber C'.In this tool
In body embodiment, hydraulic system includes low pressure liquid output terminal and highly pressurised liquid output terminal, and low pressure liquid output terminal passes through first
Low-pressure port T on hydraulic pressure chamber A' directly conveys low pressure liquid to the first hydraulic pressure chamber A', and highly pressurised liquid output terminal passes through the second liquid
High pressure port P on pressure chamber B' is directly to the second hydraulic pressure chamber B' conveying high-pressure liquid.
Hydraulic system may be actuated into：Under the first default operating mode as shown in Figure 3, low pressure liquid is passed through in third hydraulic pressure chamber C'
Body, piston 2 are mobile to first direction (direction from left to right i.e. shown in Fig. 3)；Second default operating mode as shown in Figure 4
Under, highly pressurised liquid is passed through in third hydraulic pressure chamber C', piston 2 is moved to second direction (direction from right to left i.e. shown in Fig. 4)
It is dynamic.
In this embodiment, piston 2 includes the first service portion 21 arranged successively, the first driving portion 22, second drives
Dynamic 23 and second service portion 24 of portion, the first service portion 21 is identical with the radial dimension of the second service portion 24, wherein the first service portion
21st, the radial dimension of the first driving portion 22 and the second driving portion 23 is respectively D3, D2, D1, and D3, D2, D1 are sequentially increased.Piston
The hydraulic pressure chamber of shell 1 be the first segment arranged successively, second segment, third section, the 4th section and the 5th section, the radial dimension of third section is small
In second segment and the 4th section, the sealing of the first driving portion 22 is slidedly arranged at the third section of hydraulic pressure chamber, and by the second segment and the 4th
Section separates, and second segment is first chamber；The sealing of second driving portion 23 is slidedly arranged at the 4th section of the hydraulic pressure chamber, and by the 4th section
It is divided into second chamber and third chamber；The sealing of first service portion 21 is slidedly arranged at the first segment of hydraulic pressure chamber, the second service portion 24
Sealing is slidedly arranged at the 5th section of hydraulic pressure chamber.
As shown in Figure 5 and Figure 6, hydraulic system further includes the two position three-way valve 3 positioned at the inside of piston 2.Piston 2 is equipped with
First oil circuit, the second oil circuit and third oil circuit, two position three-way valve 3 include the first hydraulic fluid port A, the second hydraulic fluid port B and with third hydraulic fluid port C.
The Single port of first oil circuit is connected with the first hydraulic pressure chamber A', and another port is connected with the first hydraulic fluid port A；The Single port of second oil circuit with
Second hydraulic pressure chamber B' is connected, and another port is connected with the second hydraulic fluid port B；The Single port of third oil circuit is connected with third hydraulic pressure chamber C',
Another port is connected with third hydraulic fluid port C.Under first default operating mode, the first hydraulic fluid port A is connected with third hydraulic fluid port C；Second default operating mode
Under, the second hydraulic fluid port B is connected with third hydraulic fluid port C.
Specifically, two position three-way valve 3 includes valve casing 31 and spool 32.Wherein, valve casing 31 is integrally formed with piston 2, spool
32 include fixed part 321 and sliding part 322, sliding part 322 include along the first direction (as described in Fig. 4,5 from left to right
Direction) first segment, second segment, third section and the 4th section arranged successively, first segment, second segment and the third section of sliding part 322
Outer diameter be gradually reduced, it is D4 that the 4th section of outer diameter of the second segment of sliding part 322 and its is equal, and the outer diameter of first segment is D5,
Ladder hole, the hole of the first segment (left-half of ladder hole as shown in Figure 6) of ladder hole are equipped in sliding part 322
Diameter is more than the aperture of its second segment (right half part of the ladder hole as shown in Fig. 5,6), and ladder hole is along the first direction (i.e.
Fig. 5, the direction from left to right shown in 6) the sealing of first segment through-hole be slidedly arranged on the outside of fixed part 321, fixed part 321
Outer diameter is D6.The internal chamber of valve casing 31 includes the first segment and second segment arranged successively along the first direction, and the first of valve casing 31
The radial dimension of section is more than its second segment, and the first segment and second segment of valve casing 31 are located at the both sides of the first hydraulic fluid port A, and the of valve casing 31
The second hydraulic fluid port B and third hydraulic fluid port C is equipped at two sections.The first segment sealing of sliding part 322 is slidedly arranged on the first segment of valve casing 31, slides
The second segment in portion 322 and the 4th section of sealing are slidedly arranged on the second segment of valve casing 31.
Specifically, piston 2 is equipped with the 4th oil circuit, the second segment of valve casing 31 is equipped with the 4th hydraulic fluid port, the one of the 4th oil circuit
Port is connected with the second hydraulic pressure chamber B', and another port is connected with the 4th hydraulic fluid port, and side of the 4th oil circuit with being located at spool 32
The internal chamber of valve casing 31 connects always, that is to say, that the highly pressurised liquid in the second hydraulic pressure chamber B' passes through the 4th oil on piston 2
Road is connected with the 4th hydraulic fluid port on valve casing 31, and the inner chamber of the valve casing 31 positioned at the side of spool 32 is entered to through the 4th hydraulic fluid port
Room, so as to make the internal chamber of the valve casing 31 positioned at the side of the spool 32 right part chamber of the valve casing 31 shown in 6 (i.e. Fig. 5)
In be passed through highly pressurised liquid always.Specifically, piston 2 is equipped with the 5th oil circuit, the first segment of valve casing 31 is equipped with the 5th hydraulic fluid port F,
The Single port of 5th oil circuit is connected with the 5th hydraulic fluid port F, and with the movement of piston, the another port F' of the 5th oil circuit is respectively with first
Hydraulic pressure chamber A' and the second hydraulic pressure chamber B' connections.
The specific work process of the hydraulic reciprocating driving mechanism of this specific embodiment is as described below：
Fig. 3,5 be hydraulic reciprocating driving mechanism the first default operating mode, when the another port of the 5th oil circuit (i.e. institute in Fig. 3
The F' mouths shown) when being connected with the first hydraulic pressure chamber A', the low pressure liquid in the first hydraulic pressure chamber A' is circulated to valve casing by the 5th oil circuit
31 first segment, and entered in valve casing 31 by the 5th hydraulic fluid port F of valve casing 31, at this point, the left end chamber of spool 32 is low pressure
State, and the right end chamber of spool 32 is connected always with connecting the 4th hydraulic fluid port of the second hydraulic pressure chamber B', therefore remains high pressure
State, the first hydraulic fluid port A and third hydraulic fluid port C are interconnected, and are connected with the first hydraulic pressure chamber A', low-pressure state are kept, in hydraulic pressure
(hydraulic pressure is F=pS=p π (D4 to pressure2-D62)/4) promotion under, the sliding part 322 in spool 32 is moved to the left to attached drawing
Position shown in 5.
At this point, the first hydraulic fluid port A and third hydraulic fluid port C are interconnected, towards the low-voltage interface T of piston shell 1, and at this point,
Channel between two hydraulic fluid port B and third hydraulic fluid port C is blocked by the 4th section of cylindrical surface of sliding part 322, and oil circuit is separated.Due to
One hydraulic fluid port A is connected by the first oil circuit on piston 2 with the first hydraulic pressure chamber A', third hydraulic fluid port C by third oil circuit on piston 2 with
Third hydraulic pressure chamber C' is connected, so, when the first hydraulic fluid port A in two position three-way valve is connected with third hydraulic fluid port C, the in piston shell
One hydraulic pressure chamber A' is connected with third hydraulic pressure chamber C', and low pressure liquid is flowed into from the first hydraulic pressure chamber A' in third hydraulic pressure chamber C', so as to
The movement oil circuit of the piston 2 shown in attached drawing 3 is formed, at this point, the first hydraulic pressure chamber A' and third hydraulic pressure chamber C' are low-pressure state,
Second hydraulic pressure chamber B' is high pressure conditions, and (hydraulic pressure is F=pS=p π (D1 under hydraulic pressure promotion2-D22)/4), piston is whole
(i.e. first direction) moves body to the right.Two position three-way valve 3 by spool 32 by being set as fixed part 321 and sliding part 322, Ke Yiyou
Effect reduces the impact force that spool 32 commutates, by F=pS=p π D42/ 4 are reduced to F=pS=p π (D42-D62)/4。
Fig. 4,6 the second default operating mode for hydraulic reciprocating driving mechanism, when piston 2 is transported to the right under the driving of hydraulic oil
It is dynamic, when being moved to 4 position of attached drawing, another port (the F' mouths i.e. shown in Fig. 4) and the second hydraulic pressure of the 5th oil circuit on piston 2
Room B' is connected, and the high pressure oil in the second hydraulic pressure chamber B' is circulated to the first segment of valve casing 31 by the 5th oil circuit, and passes through valve casing 31
The 5th hydraulic fluid port F enter in valve casing 31, at this point, the left part chamber of spool 32 is high pressure conditions, and due to the on valve casing 31
One hydraulic fluid port A is connected with the first oil circuit on piston 2, keeps low pressure, and the second hydraulic fluid port B and third hydraulic fluid port C be interconnected, and with the
Two hydraulic pressure chamber B' are connected, and keep high pressure conditions, and the right part chamber of spool 32 is connected by the 4th oil circuit with the second hydraulic pressure chamber B', are protected
High pressure conditions are held, (hydraulic pressure is F=pS=p π (D5 in hydraulic pressure2-D42)/4) promotion under, spool 32 moves right to
The shown position of attached drawing 6.
At this point, the second hydraulic fluid port B and third hydraulic fluid port C are interconnected, towards the high voltage interface P of piston shell 1, and at this point,
Channel between one hydraulic fluid port A and third hydraulic fluid port C is blocked by the cylindrical surface of the second segment of sliding part 322, and oil circuit is separated.Due to
Two hydraulic fluid port B are connected by the second oil circuit on piston 2 with the second hydraulic pressure chamber B', third hydraulic fluid port C by third oil circuit on piston 2 with
Third hydraulic pressure chamber C' is connected, so, when the second hydraulic fluid port B in two position three-way valve is connected with third hydraulic fluid port C, the in piston shell
Two hydraulic pressure chamber B' are connected with third hydraulic pressure chamber C', and highly pressurised liquid is flowed into from the second hydraulic pressure chamber B' in third hydraulic pressure chamber C', so as to
The movement oil circuit of the piston 2 shown in attached drawing 4 is formed, the first hydraulic pressure chamber A' is low-pressure state, the second hydraulic pressure chamber B' and third liquid
Pressure chamber C' is high pressure conditions, and (hydraulic pressure is F=pS=p π (D2 under hydraulic pressure promotion2-D32)/4), piston it is whole to
Left (i.e. second direction) movement.
Hydraulic reciprocating driving mechanism disclosed in this specific embodiment is due to special structure design, as long as the first hydraulic pressure chamber
Hydraulic pressure in A' can realize the reciprocating motion of piston 2 less than the hydraulic pressure in the second hydraulic pressure chamber B', and the commutation of piston is certainly
Move to not needing to external control, in commutation, spool 32 and piston 2 in reversal valve change the reversing impact power being subject to and all compare
Smaller, piston 2 operates steadily, and three more traditional cylinder single action piston pumps are compared, the hydraulic reciprocating driving in this specific embodiment
Mechanism irrotationality rotation member, can realize automatic reverse, and few easy workout part, control mode is simple, and operating cost is low, and structure is tight
It gathers, is small, is light-weight.
It of courses, in other specific embodiments of the hydraulic reciprocating driving mechanism mechanism of invention, the phase of three hydraulic pressure chambers
Position relationship can be adjusted according to actual needs, corresponding piston, piston shell concrete structure should adapt to therewith
Adjustment, when adjustment only needs to ensure to lead to highly pressurised liquid in hydraulic variable room, piston moves under the action of hydraulic coupling to a direction
Dynamic, when leading to low pressure oil in hydraulic variable room, piston moves round about under the action of hydraulic coupling；In addition, hydraulic system
Highly pressurised liquid and low pressure liquid can be inputted directly into the first hydraulic pressure chamber and the second hydraulic pressure chamber, can also by valve or other
Structure conveys；For controlling the reversal valve that piston turns to that can also use other control structures other than two position three-way valve；
Two position three-way valve can be arranged on internal piston, can also be arranged on piston exterior；The concrete structure of two position three-way valve and its control
The mode of piston processed can be adaptively adjusted according to actual needs, and details are not described herein again.
As shown in Figure 7 and Figure 8, this specific embodiment discloses a kind of hydraulic reciprocating pump, is driven including above-mentioned hydraulic reciprocating
Mechanism and a pump case 4, pump case 4 are arranged on the outside of piston shell 1, are internally provided with the first working chamber 41 and the second working chamber 42,
First working chamber 41 and the second working chamber 42 are symmetrical arranged, and the first service portion 21 of the first end of piston 2, i.e. piston, effect
In the first working chamber 41, the second service portion 24 of the second end of piston 2, i.e. piston acts on the second working chamber 42.First is default
Under operating mode, the first working chamber 41 sucking working fluid, the second working chamber 42 discharge working fluid；Under second default operating mode, first
Working chamber 41 discharges working fluid, the second working chamber 42 sucking working fluid.
Specifically, the first working chamber 41 is equipped with the first check valve 43 and the second check valve, the second working chamber 42 is equipped with
Third check valve and the 4th check valve, the first check valve and the second check valve are arranged on the not homonymy of the first working chamber 41, third
Check valve and the 4th check valve are separately positioned on the not homonymy of the second working chamber 42, and the first check valve and third check valve are located at
The same side, i.e. Fig. 7, the downside shown in 8, the second check valve and the 4th check valve are located at the same side, i.e. Fig. 7, the upside shown in 8.
Under first default operating mode, the first check valve is opened, the second closed check valve, third closed check valve, and the 4th check valve is opened, the
One working chamber 41 sucks working fluid, the second working chamber 42 discharge working fluid.Under second default operating mode, the first check valve closes
It closing, the second check valve is opened, and third check valve is opened, the 4th closed check valve, the first working chamber 41 discharge working fluid, and second
Working chamber 42 sucks working fluid.
As shown in Figure 7,8, the hydraulic reciprocating transfer tube in this specific embodiment further includes shell, and intake antrum is equipped in shell
Body 51 and water outlet cavity 52, the first working chamber 41 are connected by the first check valve with water inlet cavity 51, by the second check valve and
Water outlet cavity 52 connects, and the second working chamber 42 is connected by third check valve with water inlet cavity 51, by the 4th check valve with going out
Water chamber 52 connects.
Hydraulic reciprocating driving mechanism pump disclosed in this specific embodiment can realize automatic reverse, and control mode is simple,
And it is compact-sized, small, light-weight, it is easy to product seriation expansion, it is widely used that current numerous industries can be substituted
Conventional reciprocating pumps and the pump of other structures form, there is good application prospect.
It of courses, in other specific embodiments of the hydraulic reciprocating driving mechanism pump of invention, the working chamber in pump case is also
Can only setting one, the valve set on working chamber can also select the valve of other forms, as long as can be according to working as work
Hydraulic pressure changes switch working chamber in chamber, and details are not described herein again.
It should be noted that above-described embodiment can be freely combined as needed.The above is only the preferred of the present invention
Embodiment, it is noted that for those skilled in the art, in the premise for not departing from the principle of the invention
Under, several improvements and modifications can also be made, these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of hydraulic reciprocating driving mechanism, which is characterized in that including：
Piston shell, the piston shell is interior to be equipped with hydraulic pressure chamber；
Piston, the piston are arranged in the hydraulic pressure chamber of the piston shell, and the hydraulic pressure chamber is separated into the first hydraulic pressure chamber,
Two hydraulic pressure chambers and third hydraulic pressure chamber；
Hydraulic system, the hydraulic system are passed through low pressure liquid to first hydraulic pressure chamber, and height is passed through to second hydraulic pressure chamber
Press liquid, the hydraulic system may be actuated into：
Under first default operating mode, low pressure liquid is passed through in the third hydraulic pressure chamber, the piston is moved to first direction；
Under second default operating mode, it being passed through highly pressurised liquid in the third hydraulic pressure chamber, the piston is moved to second direction, and described the
Two directions are opposite to the first direction.
2. hydraulic reciprocating driving mechanism as described in claim 1, it is characterised in that：
First hydraulic pressure chamber, the second hydraulic pressure chamber and third hydraulic pressure chamber are set gradually, and second hydraulic pressure chamber is located at described first
Between hydraulic pressure chamber and third hydraulic pressure chamber；
The first direction is directed toward the direction of the second hydraulic pressure chamber for the first hydraulic pressure chamber, and the second direction is directed toward for the second hydraulic pressure chamber
The direction of first hydraulic pressure chamber.
3. hydraulic reciprocating driving mechanism as claimed in claim 2, it is characterised in that：
The piston includes the first service portion, the first driving portion, the second driving portion and the second service portion arranged successively, wherein institute
The radial dimension for stating the first service portion, first driving portion and second driving portion successively increases, first service portion
It is identical with the radial dimension of second service portion；
The hydraulic pressure chamber of the piston shell be the first segment arranged successively, second segment, third section, the 4th section and the 5th section, described
Three sections of radial dimension is less than the second segment and the 4th section；
First driving portion sealing is slidedly arranged at the third section of the hydraulic pressure chamber, and by the second segment and described 4th section point
Every the second segment is the first chamber；
The second driving portion sealing is slidedly arranged at the 4th section of the hydraulic pressure chamber, and be divided into described second by described 4th section
Chamber and third chamber；
The first service portion sealing is slidedly arranged at the first segment of the hydraulic pressure chamber, and the second service portion sealing is slidedly arranged on described
At the 5th section of hydraulic pressure chamber.
4. hydraulic reciprocating driving mechanism as claimed in claim 2, it is characterised in that：
The hydraulic system includes low pressure liquid output terminal and highly pressurised liquid output terminal, the low pressure liquid output terminal and described the
One hydraulic pressure chamber directly connects, and the highly pressurised liquid output terminal is directly connected with second hydraulic pressure chamber.
5. hydraulic reciprocating driving mechanism as claimed in claim 4, it is characterised in that：
The hydraulic system further includes two position three-way valve, and the two position three-way valve includes connected with first hydraulic pressure chamber first
Hydraulic fluid port, the second hydraulic fluid port connected with second hydraulic pressure chamber and the third hydraulic fluid port connected with the third sub-chamber；
Under first default operating mode, first hydraulic fluid port is connected with third hydraulic fluid port；
Under second default operating mode, second hydraulic fluid port is connected with third hydraulic fluid port.
6. hydraulic reciprocating driving mechanism as claimed in claim 5, it is characterised in that：
The two position three-way valve is located at the inside of the piston, and the piston is equipped with the first oil circuit, the second oil circuit and third oil
Road；
The Single port of first oil circuit is connected with first hydraulic pressure chamber, and another port is connected with first hydraulic fluid port；
The Single port of second oil circuit is connected with second hydraulic pressure chamber, and another port is connected with second hydraulic fluid port；
The Single port of the third oil circuit is connected with the third hydraulic pressure chamber, and another port is connected with the third hydraulic fluid port.
7. hydraulic reciprocating driving mechanism as claimed in claim 6, it is characterised in that：
The two position three-way valve includes valve casing and spool；
The spool includes fixed part and sliding part, and the sliding part includes the first segment arranged successively along the first direction, second
Section, third section and the 4th section, the outer diameter of the first segment of the sliding part, second segment and third section are gradually reduced, the sliding part
The 4th section of outer diameter of second segment and its it is equal, ladder hole is equipped in the sliding part, the first segment of the ladder hole
Aperture is more than the aperture of its second segment, and the first segment through-hole sealing of the ladder hole along the first direction is slidedly arranged on the fixed part
Outside；
The internal chamber of the valve casing includes the first segment and second segment arranged successively along the first direction, the first segment of the valve casing
Radial dimension be more than its second segment, the first segment and second segment of the valve casing are located at the both sides of first hydraulic fluid port, the valve
Second hydraulic fluid port and the third hydraulic fluid port are equipped at the second segment of shell；
The first segment sealing of the sliding part is slidedly arranged on the first segment of the valve casing, the second segment of the sliding part and the 4th section it is close
Envelope is slidedly arranged on the second segment of the valve casing；
The piston is equipped with the 4th oil circuit, and the second segment of the valve casing is equipped with the 4th hydraulic fluid port, one end of the 4th oil circuit
Mouth is connected with second hydraulic pressure chamber, and another port is connected with the 4th hydraulic fluid port, and the 4th oil circuit is with being located at the valve
The internal chamber of the valve casing of the side of core connects always；
The piston is equipped with the 5th oil circuit, and the first segment of the valve casing is equipped with the 5th hydraulic fluid port F, one end of the 5th oil circuit
Mouth is connected with the 5th hydraulic fluid port F；
When the another port of the 5th oil circuit is connected with first hydraulic pressure chamber, the sliding part moves in a second direction,
First hydraulic fluid port is connected with third hydraulic fluid port；
When the another port of the 5th oil circuit is connected with second hydraulic pressure chamber, the sliding part moves along the first direction,
Second hydraulic fluid port is connected with third hydraulic fluid port.
8. a kind of hydraulic reciprocating pump, which is characterized in that including：
Hydraulic reciprocating driving mechanism as described in any one of claim 1 to 7；
Pump case is arranged on the outside of the piston shell, is internally provided with the first working chamber, and the first end of the piston acts on
First working chamber；
Under first default operating mode, first working chamber sucks working fluid；
Under second default operating mode, first working chamber discharges working fluid.
9. hydraulic reciprocating pump as claimed in claim 8, it is characterised in that：
First working chamber is equipped with the first check valve and the second check valve, first check valve and second check valve
It is arranged on the not homonymy of first working chamber；
Under first default operating mode, first check valve is opened, second closed check valve；
Under second default operating mode, first closed check valve, second check valve is opened.
10. hydraulic reciprocating pump as claimed in claim 8, it is characterised in that：
The second working chamber is additionally provided in the pump case, second working chamber is symmetrical arranged with first working chamber, the work
The second end of plug acts on second working chamber；
Under first default operating mode, second working chamber discharges working fluid；
Under second default operating mode, second working chamber sucks working fluid；
Second working chamber is equipped with third check valve and the 4th check valve, the third check valve and the 4th check valve
The not homonymy of second working chamber is separately positioned on, and the third check valve and the first check valve are located at the same side, it is described
4th check valve and the second check valve are located at the same side；
Under first default operating mode, the third closed check valve, the 4th check valve is opened；
Under the described second default operating mode, the third check valve is opened, the 4th closed check valve.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711170432.7A CN108167261B (en) | 2017-11-22 | 2017-11-22 | Hydraulic reciprocating driving mechanism and hydraulic reciprocating driving pump |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711170432.7A CN108167261B (en) | 2017-11-22 | 2017-11-22 | Hydraulic reciprocating driving mechanism and hydraulic reciprocating driving pump |
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| CN108167261A true CN108167261A (en) | 2018-06-15 |
| CN108167261B CN108167261B (en) | 2022-07-12 |
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| CN108167261B (en) | 2022-07-12 |
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