CN107152423B - Closed type hydraulic system with balanced valve - Google Patents
Closed type hydraulic system with balanced valve Download PDFInfo
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- CN107152423B CN107152423B CN201710460166.5A CN201710460166A CN107152423B CN 107152423 B CN107152423 B CN 107152423B CN 201710460166 A CN201710460166 A CN 201710460166A CN 107152423 B CN107152423 B CN 107152423B
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- valve
- interface
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- outlet
- motor
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Classifications
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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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
Abstract
The present invention relates to a kind of closed type hydraulic systems, specifically with the closed type hydraulic system of balanced valve, especially suitable for scientific investigation class winch and other elevator class winches.It includes enclosed pump, motor.The enclosed pump has first interface and second interface, and the motor has third interface and the 4th interface.The enclosed pump is connected with the first fuel tank, and the first interface of enclosed pump is connected by pipeline with the third interface of motor.Its main feature is that further including counterbalance valve, the counterbalance valve has import, outlet and control mouth, the import of counterbalance valve is connected by pipeline with the 4th interface of motor, the outlet of counterbalance valve is connected by pipeline with the second interface that enclosed pumps, there is check valve between the import and outlet of counterbalance valve, the flow direction of check valve is the import that exports to from counterbalance valve, and the control mouth of counterbalance valve is connected with control oil circuit by pipeline.The hydraulic system can keep loading, and calorific value is small, it is ensured that system operates normally.
Description
Technical field
The present invention relates to a kind of closed type hydraulic systems, particularly suitable specifically with the closed type hydraulic system of balanced valve
In scientific investigation class winch and other elevator class winches.
Background technique
Closed type hydraulic system because have compact-sized, stable drive, transmission efficiency it is high, without throttling and spill losses, system
The advantages that fast is responded, so pulling winch is generally used closed type hydraulic system driving.
Currently, the closed type hydraulic system of pulling winch includes enclosed pump, motor.The enclosed pump has first interface and second
Interface, the motor have third interface and the 4th interface.The enclosed pump is connected with the first fuel tank, and the first interface of enclosed pump is logical
Piping is connected with the third interface of motor, and the second interface of enclosed pump is connected by pipeline with the 4th interface of motor.This
Closed type hydraulic system is planted due to the characteristic of system itself, along with fluid pressure line arrangement is general all longer, when pulling winch hangs load
For weight when starting moment, system pressure can not establish required value at once, there are problems that cannot keep load, lead to weight
Have it is secondary under the risk fallen.Also have in the prior art and be directly added into pressure elements balanced valve in closed type hydraulic system, passes through production
The pressure loss is given birth to achieve the purpose that keep load.However, be directly added into balanced valve will lead to system heat generation amount increase, influence be
System operates normally.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of closed type hydraulic systems with balanced valve, which can
Load is kept, calorific value is small, it is ensured that system operates normally.
To solve the above problems, the following technical schemes are provided:
Closed type hydraulic system with balanced valve of the invention includes enclosed pump, motor.The enclosed pump has first interface
And second interface, the motor have third interface and the 4th interface.The enclosed, which pumps, is connected with the first fuel tank, and the first of enclosed pump
Interface is connected by pipeline with the third interface of motor.Its main feature is that further including counterbalance valve, which has import, outlet and control
The import of donsole, counterbalance valve is connected by pipeline with the 4th interface of motor, what the outlet of counterbalance valve was pumped by pipeline and enclosed
Second interface is connected, and has check valve between the import and outlet of counterbalance valve, and the flow direction of check valve is to export to import from counterbalance valve,
The control mouth of counterbalance valve is connected with control oil circuit by pipeline.
Wherein, the control oil circuit includes solenoid directional control valve and gear pump, and gear pump has oil inlet and oil outlet, and electromagnetism changes
Have inlet, the first liquid outlet and the second liquid outlet to valve, the oil inlet of gear pump is connected with the second fuel tank, gear pump it is fuel-displaced
Mouth is connected with the inlet of solenoid directional control valve, and the first liquid outlet of solenoid directional control valve passes through the control mouth phase of pipeline and counterbalance valve
Even, the second liquid outlet of solenoid directional control valve is connected with third fuel tank by pipeline, and the oil outlet of gear pump passes through pipeline and third
Fuel tank is connected, and has overflow valve on the pipeline between the oil outlet of gear pump and third fuel tank.
There is shuttle valve on that segment pipe between first liquid outlet of the solenoid directional control valve and the control mouth of counterbalance valve, shuttle valve is also
It is connected by pipeline with the first interface that enclosed pumps.
The above scheme has the following advantages:
What it is due to the closed type hydraulic system with balanced valve of the invention further includes counterbalance valve, which has import, goes out
The import of mouth and control mouth, counterbalance valve is connected by pipeline with the 4th interface of motor, and the outlet of counterbalance valve by pipeline and is closed
The second interface of formula pump is connected, and has check valve between the import and outlet of counterbalance valve, the flow direction of check valve is from the outlet of counterbalance valve
Control mouth to import, counterbalance valve is connected with control oil circuit by pipeline.Parallel valve is constituted using check valve and counterbalance valve, so that
The closed type hydraulic system can keep loading.Moreover, when in use, when the second interface of enclosed pump is fuel-displaced, first interface oil inlet, horse
Up to when being in promotion state, control oil circuit is not involved in movement, and the oil liquid of the second interface of enclosed pump enters horse by check valve
The 4th interface reached, due to check valve back pressure very little, so balanced valve generates heat very little caused by hydraulic system under this state.When
The first interface of enclosed pump is fuel-displaced, second interface oil inlet, and when motor is in decentralization state, control oil circuit participation movement passes through back
The control mouth of pressure valve opens counterbalance valve, so that oil liquid successively passes through the 4th interface and back of the third interface of motor, motor, motor
The second interface that motor closed pump is arrived after pressure valve, since balanced valve is in the open state, so balanced valve is to hydraulic pressure system under this state
It generates heat caused by system very little.Therefore, calorific value is small at work for this closed type hydraulic system, and the influence to system operation is smaller,
So that system can operate normally.
Detailed description of the invention
The structure principle chart of the position Fig. 1 closed type hydraulic system with balanced valve of the invention.
Specific embodiment
Below in conjunction with attached drawing, present invention is further described in detail.
As shown in Figure 1, the closed type hydraulic system with balanced valve of the invention includes enclosed pump 1, motor 4 and counterbalance valve 3.
The enclosed pump 1 has first interface A1 and second interface B1, and the motor 4 has third interface A4 and the 4th interface B4.It is described to close
Formula pump 1 is connected with the first fuel tank 11, and the first interface A1 of enclosed pump 1 is connected by pipeline with the third interface A4 of motor 4.It is described
Counterbalance valve 3 has import A3, outlet B3 and control mouth C, and the import A3 of counterbalance valve 3 passes through the 4th interface B4 phase of pipeline and motor 4
Even, the outlet B3 of counterbalance valve 3 is connected by pipeline with the second interface B1 of enclosed pump 1, between the import A3 and outlet B3 of counterbalance valve 3
There is check valve 2, the flow direction of check valve 2 is the outlet B3 to import A3 from counterbalance valve 3, and the control mouth C of counterbalance valve 3 is connected by pipeline
It is connected to control oil circuit.
Wherein, the control oil circuit includes solenoid directional control valve 6 and gear pump 10, and gear pump 10 has oil inlet A10 and fuel-displaced
Mouth B10, solenoid directional control valve 6 have inlet P, the first liquid outlet A6 and the second liquid outlet B6, the oil inlet A10 connection of gear pump 10
There is the second fuel tank 9, the oil outlet B10 of gear pump 10 is connected with the inlet P of solenoid directional control valve 6, and the first of solenoid directional control valve 6 goes out
Liquid mouth A6 is connected by pipeline with the control mouth C of counterbalance valve 3, and the second liquid outlet B6 of solenoid directional control valve 6 is connected with by pipeline
Third fuel tank 8, the oil outlet B10 of gear pump 10 are connected by pipeline with third fuel tank 8, and the oil outlet B10 of gear pump 10 and
There is overflow valve 7 on pipeline between third fuel tank 8.
There is shuttle valve 5 on that segment pipe between first liquid outlet A6 of the solenoid directional control valve 6 and the control mouth C of counterbalance valve 3,
Shuttle valve 5 is also connected by pipeline with the first interface A1 of enclosed pump 1.
In use, state one, the second interface B1 of enclosed pump 1 is fuel-displaced, first interface A1 oil inlet.
Under this state, control oil circuit is not involved in movement, and counterbalance valve 3 is closed, and the inlet P of solenoid directional control valve 6 goes out with first
Liquid mouth A6 is obstructed, and the inlet P of solenoid directional control valve 6 is communicated with the second liquid outlet B6, under the action of gear pump 10, the second fuel tank
Oil outlet B10, the electromagnetic switch of the oily oil inlet A10 for successively passing through gear pump 10 of control, gear pump 10, gear pump 10 in 9
The inlet P of valve 6, solenoid directional control valve 6, solenoid directional control valve 6 the second liquid outlet B6 after enter in third fuel tank 8, unloaded
Lotus.Under the action of enclosed pump 1, the system oil in the first fuel tank 11 successively pass through enclosed pump 1, enclosed pump 1 second interface B1,
Check valve 2, the 4th interface B4 of motor 4, motor 4, the third interface A4 of motor 4, enclosed pump 1 first interface A1 after again into
Enter into enclosed pump 1, so recycle, system oil successively pass through the 4th interface B4 of motor 4, motor 4, motor 4 third connect
During mouth A4, drive motor 4 makes motor 4 be in promotion state.
The first interface A1 of state two, enclosed pump 1 is fuel-displaced, second interface B1 oil inlet.
Under this state, control oil circuit participation movement, the inlet P of solenoid directional control valve 6 are communicated with the first liquid outlet A6, electromagnetism
The inlet P of reversal valve 6 and the second liquid outlet B6 are obstructed, and under the action of gear pump 10, the control oil in the second fuel tank 9 is successively
By the oil inlet A10 of gear pump 10, gear pump 10, the oil outlet B10 of gear pump 10, solenoid directional control valve 6 inlet P, electricity
The control mouth C of counterbalance valve 3 is entered after magnetic reversal valve 6, the first liquid outlet A6 of solenoid directional control valve 6, shuttle valve 5, opens counterbalance valve
3.Meanwhile under the action of enclosed pump 1, the system oil in the first fuel tank 11 successively passes through enclosed pump 1, enclosed pumps 1 first interface
Third interface A4, motor 4, the 4th interface B4 of motor 4, the import A3 of counterbalance valve 3, counterbalance valve 3, the counterbalance valve 3 of A1, motor 4
Outlet B3, enclosed pump 1 second interface B1 after be re-introduced into enclosed pump 1 in, so recycle, system oil pass through motor 4
Third interface A4, motor 4, motor 4 the 4th interface B4 during, drive motor 4 makes motor 4 be in decentralization state
In the case where state two, when control oil circuit break down when, from enclosed pump 1 first interface A1 go out system
Be divided into two parts, portion flow to motor 4, another by shuttle valve 5 enter counterbalance valve 3 control mouth C, open counterbalance valve 3 so that
Hydraulic system can still operate normally.
Claims (2)
1. the closed type hydraulic system with balanced valve, including enclosed pump (1), motor (4)；The enclosed pump (1) has first interface
(A1) and second interface (B1), the motor (4) have third interface (A4) and the 4th interface (B4)；Enclosed pump (1) connection
Have the first fuel tank (11), the first interface (A1) of enclosed pump (1) is connected by pipeline with the third interface (A4) of motor (4)；Its
It is characterized in that further including counterbalance valve (3), which has import (A3), outlet (B3) and control mouth (C), counterbalance valve (3)
Import (A3) is connected by pipeline with the 4th interface (B4) of motor (4), and the outlet (B3) of counterbalance valve (3) passes through pipeline and enclosed
The second interface (B1) for pumping (1) is connected, and has check valve (2) between the import (A3) and outlet (B3) of counterbalance valve (3), check valve (2)
Flow direction be from the outlet (B3) of counterbalance valve (3) to import (A3), the control mouth (C) of counterbalance valve (3) is connected with control by pipeline
Liquefaction road；The control oil circuit includes solenoid directional control valve (6) and gear pump (10), and gear pump (10) has oil inlet (A10) and goes out
Hydraulic fluid port (B10), solenoid directional control valve (6) have inlet (P), the first liquid outlet (A6) and the second liquid outlet (B6), gear pump (10)
Oil inlet (A10) be connected with the second fuel tank (9), the inlet of the oil outlet (B10) of gear pump (10) and solenoid directional control valve (6)
(P) it is connected, the first liquid outlet (A6) of solenoid directional control valve (6) is connected by pipeline with the control mouth (C) of counterbalance valve (3), electromagnetism
The second liquid outlet (B6) of reversal valve (6) is connected with third fuel tank (8) by pipeline, and the oil outlet (B10) of gear pump (10) is logical
Piping is connected with third fuel tank (8), and has on the pipeline between the oil outlet (B10) and third fuel tank (8) of gear pump (10) excessive
It flows valve (7).
2. as described in claim 1 with the closed type hydraulic system of balanced valve, it is characterised in that the solenoid directional control valve (6)
Have shuttle valve (5) on that segment pipe between first liquid outlet (A6) and the control mouth (C) of counterbalance valve (3), shuttle valve (5) also passes through pipeline
It is connected with the first interface (A1) of enclosed pump (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710460166.5A CN107152423B (en) | 2017-06-17 | 2017-06-17 | Closed type hydraulic system with balanced valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710460166.5A CN107152423B (en) | 2017-06-17 | 2017-06-17 | Closed type hydraulic system with balanced valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107152423A CN107152423A (en) | 2017-09-12 |
| CN107152423B true CN107152423B (en) | 2019-03-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710460166.5A Active CN107152423B (en) | 2017-06-17 | 2017-06-17 | Closed type hydraulic system with balanced valve |
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| Country | Link |
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| CN (1) | CN107152423B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109773103A (en) * | 2019-03-18 | 2019-05-21 | 杭州诺祥科技有限公司 | A kind of hydraulic motor servo-controlled system of flow matches formula |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102518610A (en) * | 2011-12-15 | 2012-06-27 | 常德中联重科液压有限公司 | Motor control loop and control valve |
| CN102874704A (en) * | 2012-09-28 | 2013-01-16 | 三一重工股份有限公司 | Hydraulic system, hoisting mechanism and engineering machinery |
| CN103256264A (en) * | 2013-05-10 | 2013-08-21 | 三一汽车起重机械有限公司 | Hydraulic system and engineering machinery with same |
| CN204138254U (en) * | 2014-07-29 | 2015-02-04 | 徐州五洋科技股份有限公司 | Flame-proof mine hydraulic wireline winch hydraulic efficiency pressure system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4268784B2 (en) * | 2002-04-08 | 2009-05-27 | 株式会社関ヶ原製作所 | Auto tension device in hydraulic crane |
| JP4432707B2 (en) * | 2004-09-30 | 2010-03-17 | コベルコ建機株式会社 | Hydraulic control circuit for construction machinery |
| JP6282941B2 (en) * | 2014-06-10 | 2018-02-21 | 株式会社神戸製鋼所 | Hydraulic drive device for work machine |
-
2017
- 2017-06-17 CN CN201710460166.5A patent/CN107152423B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102518610A (en) * | 2011-12-15 | 2012-06-27 | 常德中联重科液压有限公司 | Motor control loop and control valve |
| CN102874704A (en) * | 2012-09-28 | 2013-01-16 | 三一重工股份有限公司 | Hydraulic system, hoisting mechanism and engineering machinery |
| CN103256264A (en) * | 2013-05-10 | 2013-08-21 | 三一汽车起重机械有限公司 | Hydraulic system and engineering machinery with same |
| CN204138254U (en) * | 2014-07-29 | 2015-02-04 | 徐州五洋科技股份有限公司 | Flame-proof mine hydraulic wireline winch hydraulic efficiency pressure system |
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| Publication number | Publication date |
|---|---|
| CN107152423A (en) | 2017-09-12 |
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