CN209228750U - A kind of weight closing type hydraulic system - Google Patents
A kind of weight closing type hydraulic system Download PDFInfo
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- CN209228750U CN209228750U CN201821725212.6U CN201821725212U CN209228750U CN 209228750 U CN209228750 U CN 209228750U CN 201821725212 U CN201821725212 U CN 201821725212U CN 209228750 U CN209228750 U CN 209228750U
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Abstract
The utility model relates to a kind of weight closing type hydraulic system, including solenoid directional control valve, mechanical commutation valve, oil leak storage box, flow is adjustable inserted valve, opening and closing inserted valve, guide vane governor, guide vane servomotor, weight, operation oil circuit and control oil circuit.The utility model hydraulic system for weight off-load component using standard component design, production simply, and small volume, using safe；Solenoid directional control valve, mechanical commutation valve, oil leak storage box, flow is adjustable inserted valve and opening and closing inserted valve are designed in the system front end, when turbine-generator units revolving speed is excessively high or low-voltage occurs, when guide vane governor closes the operation failure of water distributor, form hydraulic cushion control unit, it is automatic controllable, vibration and noise is smaller, long service life；It is equipped with oil leak storage box in solenoid directional control valve and the bypass of mechanical commutation valve, is collected convenient for revealing reflux to oil liquid；Toning rectification flow displacement-adjustable amount and maximum opening within the servomotor shut-in time achieve the purpose that control flow.
Description
Technical field
The utility model relates to hydraulic system fields, and in particular to a kind of weight closing type hydraulic system.
Background technique
In hydropower scheduling, weight unloading valve is for being closed and being opened in weight closing type hydraulic system.
When low oil pressure situation occurs for turbine-generator units or governor closes water distributor operation failure, or in turbine-generator units
Overspeed protection system in, when generating unit speed is excessively high, when governor closes the operation failure of water distributor, pile combined type heavy hammer off-load
The weight of valve closes water distributor under the effect of gravity, prevents accident, provides peace for the normal operation of turbine-generator units
Complete reliable protection.
Weight closing type hydraulic system traditional at present has the following problems:
1, wherein electromagnetic distributing valve, hydraulic oil valve and weight unloading valve are designed using non-standard, and production is got up very numb
It is tired, and volume is larger, uses more danger；
2, weight unloading valve roar in action process is larger, and movement vibration is larger, and service life is shorter；
3, the uninterrupted of servomotor can not freely be adjusted.
Utility model content
The utility model provides a kind of weight closing type hydraulic system, solves the problems, such as techniques discussed above.
The scheme that the utility model solves above-mentioned technical problem is as follows: a kind of weight closing type hydraulic system, described hydraulic
System includes solenoid directional control valve, mechanical commutation valve, oil leak storage box, flow is adjustable inserted valve, opening and closing inserted valve, guide vane speed regulation
Device, guide vane servomotor, weight, operation oil circuit and control oil circuit；The solenoid directional control valve is two-position four-way solenoid directional control valve, described
Solenoid directional control valve is equipped with P2Mouth, T2Mouth, A2Mouth and B2Mouthful, the P2Mouth and the control oil communication, the T2Mouthful with it is described
The connection of oil leak storage box, the B2Mouth is in blocked state, the A2One end of mouth and the cavity in the mechanical commutation valve connects
Logical, the other end of the cavity in the mechanical commutation valve is connected to the oil leak storage box, and the mechanical commutation valve is equipped with P3
Mouth, T3Mouth, A3Mouth and B3Mouthful, the P3Mouth and the operation oil communication, the T3Mouth is connected to the oil leak storage box, institute
State A3Mouth is connected to the inlet of the opening and closing inserted valve, the B3Mouth is connected to the inlet of the adjustable inserted valve of the flow,
The opening and closing inserted valve is equipped with the first liquid outlet and the second liquid outlet, and the guide vane governor is equipped with governor and opens pipeline
And governor closes pipeline, and guide vane servomotor is equipped in the guide vane servomotor and opens chamber, guide vane servomotor closing chamber and relay
Device piston rod, the guide vane servomotor opens chamber and the guide vane servomotor closes chamber and is located at the servomotor piston rod
Two sides, it is described opening and closing inserted valve the first liquid outlet and the adjustable inserted valve of the flow liquid outlet with the guide vane servomotor
Guide vane servomotor open chamber connection, one end of the servomotor piston rod is fixed with the weight, the opening and closing inserted valve
Second liquid outlet is opened pipeline with the governor and is connected to, and the governor closes pipeline and the guide vane servomotor is closed chamber and connected
It is logical.
The beneficial effects of the utility model are: the utility model provides a kind of weight closing type hydraulic system, have with
Lower advantage:
1, in the hydraulic system be used for weight off-load major component be all made of standard component design, production get up compared with
To be simple, and small volume, using safer；
2, the system front end devise solenoid directional control valve, mechanical commutation valve, oil leak storage box, flow is adjustable inserted valve and
Inserted valve is opened and closed, when turbine-generator units revolving speed is excessively high or low-voltage occurs, guide vane governor closes the operation of water distributor
When failure, a hydraulic cushion control unit is formed, it is easy to operate, automatic controllable, vibration and noise is acted in action process
It is smaller, substantially prolong its service life；
3, it is equipped with oil leak storage box, in the bypass of solenoid directional control valve and mechanical commutation valve convenient for solenoid directional control valve and machine
The oil liquid leakage of tool reversal valve carries out reflux collection；
4, within the servomotor shut-in time can by adjusting flow it is adjustable inserting valve core displacement and maximum opening,
To achieve the purpose that control flow；
5, the system can both found dress, and can also crouch dress, easy for installation, and arrangement place is small.
Based on the above technical solution, the utility model can also do following improvement.
Further, the hydraulic system further includes check valve and oil return tank of speed controller, is closed on pipeline in the governor
Equipped with a branch, the branch is connected to by the check valve with the oil return tank of speed controller.
Beneficial effect using above-mentioned further scheme is: a branch is equipped on pipeline by closing in the governor
Road, the branch are connected to by the check valve with the oil return tank of speed controller, check valve should be mounted on oil return box than pasta compared with
Low position, to facilitate, the oil liquid in oil return tank of speed controller 103 closes chamber 82 to guide vane servomotor and governor closes pipeline 72
Interior oil liquid loss compensates.
Further, the check valve is installed on the lower section of the oil return box.
Further, the hydraulic system further includes fixed pulley, and one end of the servomotor piston rod passes through the fixed pulley
It is fixedly connected with the weight.
Beneficial effect using above-mentioned further scheme is: by by one end of servomotor piston rod by fixed pulley with again
Hammer is fixedly connected, and it is more stable in dropping process to be easy to implement weight.
Further, the hydraulic system further includes hand-operated direction valve, and the hand-operated direction valve is two position three way directional control valve, institute
Hand-operated direction valve is stated equipped with P1Mouth, T1Mouth and B1Mouthful, the P1Mouth and the control oil communication, the T1Mouth connects with fuel tank
It is logical, the B1Mouth and the P2Mouth connection.
Beneficial effect using above-mentioned further scheme is: by being equipped with hand-operated direction valve in the front end of hydraulic system,
A kind of manual control mode is provided on the basis of automatically controlled, in case solenoid directional control valve introduces a kind of hand the case where controlling failure
Dynamic regulative mode, two ways enable the control for the weight closing type system more safe and effective.
The above description is merely an outline of the technical solution of the present invention, in order to better understand the skill of the utility model
Art means, and can be implemented in accordance with the contents of the specification, below on the preferred embodiment of the present invention and the accompanying drawings in detail
It describes in detail bright as after.Specific embodiment of the present utility model is shown in detail by following embodiment and its attached drawing.
Detailed description of the invention
Attached drawing described herein is used to provide a further understanding of the present invention, and is constituted part of this application,
The exemplary embodiment of the utility model and the description thereof are used to explain the utility model, does not constitute to the improper of the utility model
It limits.In the accompanying drawings:
Fig. 1 is a kind of structural schematic diagram for weight closing type hydraulic system that an embodiment of the present invention provides.
In attached drawing, parts list represented by the reference numerals are as follows:
100, hydraulic system；10, hand-operated direction valve；20, solenoid directional control valve；30, mechanical commutation valve；40, oil leak storage box；
50, the adjustable inserted valve of flow；60, inserted valve is opened and closed；70, guide vane governor；71, governor opens pipeline；72, governor closes
Stopped pipe road；80, guide vane servomotor；81, guide vane servomotor opens chamber；82, guide vane servomotor closes chamber；83, servomotor piston rod；
90, fixed pulley；101, weight；102, check valve；103, oil return tank of speed controller；104, oil circuit is operated；105, oil circuit is controlled.
Specific embodiment
The principles of the present invention and feature are described below in conjunction with attached drawing 1, example is served only for explaining this reality
With novel, it is not intended to limit the scope of the utility model.It is more specifically retouched by way of example in the following passage referring to attached drawing
State the utility model.According to following explanation and claims, will be become apparent from feature the advantages of the utility model.It should be noted
It is that attached drawing is all made of very simplified form and using non-accurate ratio, only to facilitate, lucidly aid in illustrating this reality
With the purpose of new embodiment.
It should be noted that it can be directly on another component when component is referred to as " being fixed on " another component
Or there may also be components placed in the middle.When a component is considered as " connection " another component, it, which can be, is directly connected to
To another component or it may be simultaneously present component placed in the middle.When a component is considered as " being set to " another component, it
It can be and be set up directly on another component or may be simultaneously present component placed in the middle.Term as used herein is " vertical
", " horizontal ", "left", "right" and similar statement for illustrative purposes only.
Unless otherwise defined, all technical and scientific terms used herein are led with the technology for belonging to the utility model
The normally understood meaning of the technical staff in domain is identical.Terminology used in the description of the utility model herein only be
The purpose of description specific embodiment, it is not intended that in limitation the utility model.Term " and or " used herein includes
Any and all combinations of one or more related listed items.
As shown in Figure 1, the utility model provides a kind of weight closing type hydraulic system, the hydraulic system 100 includes
Solenoid directional control valve 20, mechanical commutation valve 30, oil leak storage box 40, flow is adjustable inserted valve 50, opening and closing inserted valve 60, guide vane speed regulation
Device 70, guide vane servomotor 80, weight 101, operation oil circuit 104 and control oil circuit 105；The solenoid directional control valve 20 is four two-ways
Solenoid directional control valve, the solenoid directional control valve 20 are equipped with P2Mouth, T2Mouth, A2Mouth and B2Mouthful, the P2Mouth and the control oil circuit 105
Connection, the T2Mouth is connected to the oil leak storage box 40, the B2Mouth is in blocked state, the A2Mouth is changed with the machinery
One end of cavity into valve 30 is connected to, the other end of the cavity in the mechanical commutation valve 30 and the oil leak storage box 40
Connection, the mechanical commutation valve 30 are equipped with P3Mouth, T3Mouth, A3Mouth and B3Mouthful, the P3Mouth is connected to the operation oil circuit 104,
The T3Mouth is connected to the oil leak storage box 40, the A3Mouth is connected to the inlet of the opening and closing inserted valve 60, the B3Mouthful
It is connected to the inlet of the adjustable inserted valve 50 of the flow, the opening and closing inserted valve 60 is equipped with the first liquid outlet and second and goes out liquid
Mouthful, the guide vane governor 70 is equipped with governor and opens pipeline 71 and governor closing pipeline 72, the guide vane servomotor 80
Interior guide vane servomotor unlatching chamber 81, guide vane servomotor closing chamber 82 and servomotor piston rod 83, the guide vane servomotor of being equipped with is opened
It opens chamber 81 and the guide vane servomotor closes the two sides that chamber 82 is located at the servomotor piston rod 83, the opening and closing inserted valve
Guide vane servomotor of the liquid outlet of 60 the first liquid outlet and the adjustable inserted valve 50 of the flow with the guide vane servomotor 80
Chamber 81 to be opened to be connected to, one end of the servomotor piston rod 83 is fixed with the weight 101, and the of the opening and closing inserted valve 60
Two liquid outlets are opened pipeline 71 with the governor and are connected to, and the governor closes pipeline 72 and the guide vane servomotor closes chamber
82 connections.
It is understood that working as A2When thering is control oil to pass through in mouthful, due to the A2Mouthful in the mechanical commutation valve 30
One end of cavity is connected to, and the other end of the cavity in the mechanical commutation valve 30 is connected to the oil leak storage box 40, the cavity
The interior spool equipped with mechanical commutation valve 30, control oil circuit 105 will will push spool and move right, which is in the right side
Position work, i.e. T3Mouth and B3Mouth communicates, P3Mouth and A3Mouth communicates.Oil leak storage box 40 is for changing solenoid directional control valve 20 and machinery
The oil liquid revealed into valve 30 collects, with oil-free outside leakage.
A kind of weight closing type hydraulic system is provided in above-described embodiment, is had the advantage that
1, it is designed for being used for major component of weight off-load in the hydraulic system using standard component, production is got up more
Simply, and small volume, using safer；
2, solenoid directional control valve 20, mechanical commutation valve 30, oil leak storage box 40, flow adjustable insertion are devised in the system front end
Valve 50 and opening and closing inserted valve 60 are filled, when turbine-generator units revolving speed is excessively high or low-voltage occurs, guide vane governor closes water guide
When the operation failure of mechanism, a hydraulic cushion control unit is formed, it is easy to operate, automatic controllable, it is acted in action process
Vibration and noise is smaller, substantially prolongs its service life；
3, it is equipped with oil leak storage box 40, in the bypass of solenoid directional control valve 20 and mechanical commutation valve 30 convenient for changing electromagnetism
Reflux collection is carried out to the leakage of the oil liquid of valve 20 and mechanical commutation valve 30；
4, it can be opened within the servomotor shut-in time by adjusting the displacement and maximum of adjustable 50 spool of inserted valve of flow
Degree, to achieve the purpose that control flow；
5, the system can both found dress, and can also crouch dress, easy for installation, and arrangement place is small.
Preferably, as shown in Figure 1, the hydraulic system 100 further includes check valve 102 and oil return tank of speed controller 103, in institute
It states governor and closes pipeline 72 equipped with a branch, the branch passes through the check valve 102 and the oil return tank of speed controller
103 connections.
A branch is equipped on pipeline 72 by closing in the governor, the branch by the check valve 102 with
The oil return tank of speed controller 103 is connected to, and check valve 102 should be mounted on oil return box position more lower than pasta, to facilitate governor
Oil liquid in oil return box 103 is closed the oil liquid loss that chamber 82 and governor are closed in pipeline 72 to guide vane servomotor and is compensated.
Preferably, as shown in Figure 1, the check valve 102 is installed on the lower section of the oil return box.
Preferably, as shown in Figure 1, the hydraulic system 100 further includes fixed pulley 90, the one of the servomotor piston rod 83
End is fixedly connected by the fixed pulley 90 with the weight 101.
By the way that one end of servomotor piston rod 83 to be fixedly connected by fixed pulley 90 with weight 101, it is easy to implement weight
101 is more stable in dropping process.
Preferably, as shown in Figure 1, the hydraulic system 100 further includes hand-operated direction valve 10, the hand-operated direction valve 10 is
Two position three way directional control valve, the hand-operated direction valve 10 are equipped with P1Mouth, T1Mouth and B1Mouthful, the P1Mouth and the control oil circuit
105 connections, the T1Mouth is connected to fuel tank, the B1Mouth and the P2Mouth connection.
By being equipped with hand-operated direction valve 10 in the front end of hydraulic system 100, provided on the basis of automatically controlled a kind of manual
Control mode, in order to avoid solenoid directional control valve introduces one kind the case where controlling failure and manually adjusts mode, two ways makes pair
It can more safely and effectively in the control of the weight closing type system.
The working condition of the utility model can be divided into two kinds of situations:
1. operate normally
Solenoid directional control valve 10 is in the work of right position, P1Mouth and B1Mouth communicates, T1The logical fuel tank of mouth, solenoid directional control valve 20 are in the right side
Position work, P2Mouth and A2Mouth communicates, T2Mouth and B2Mouth communicates, T2Mouth is communicated with oil leak storage box 40, A2Mouth and the mechanical commutation
One end of cavity in valve 30 is connected to, and the other end of the cavity in the mechanical commutation valve 30 and the oil leak storage box 40 connect
It is logical, from P1Control oil circuit 105 is passed through at mouthful, then control oil successively passes through B1Mouth, P2Mouth and A2Enter mechanical commutation valve 30 after mouthful
One end of interior cavity pushes spool in push chamber body to move right, which is in left position work, i.e. T3Mouthful with
A3Mouth communicates, P3Mouth and B3Mouth communicates；
From P3Mouth is passed through operation oil circuit 104, and operation oil passes through B3Mouth enters the inlet of the adjustable inserted valve 50 of the flow,
Downwardly against the spool of the adjustable inserted valve 50 of the flow, it is closed the lower mouth of the adjustable inserted valve 50 of flow；The A3Mouthful with it is described
The inlet connection of inserted valve 60 is opened and closed, i.e., the described opening and closing inserted valve 60 is through A3Mouth and T3Mouth is passed through oil leak storage box 40；
It is equipped with governor in guide vane governor 70 and opens chamber and governor closing chamber, governor opens chamber and governor is opened
Pipeline 71 is connected to, and governor is closed chamber and is connected to governor closing pipeline 72, and governor unlatching is intracavitary to be passed through pressure oil, driving
The spool of opening and closing inserted valve 60, which moves up, blocks the suitable for reading of opening and closing inserted valve 60, the lower mouth that pressure oil passes through opening and closing inserted valve 60
Guide vane servomotor into 80 left side of guide vane servomotor opens chamber 81, so that the guide vane of servomotor piston rod 83 to the right be pushed to connect
Power device closes the movement of chamber 82, and the oil liquid that guide vane servomotor is closed in chamber 82 closes pipeline 72 by governor and returns to guide vane servomotor
It closes in chamber 82, realizes the normal operation of guide vane servomotor 80.
A branch is equipped on pipeline 72 by closing in the governor, the branch by the check valve 102 with
The oil return tank of speed controller 103 is connected to, and check valve 102 should be mounted on oil return box position more lower than pasta, to facilitate governor
Oil liquid in oil return box 103 is closed the oil liquid loss that chamber 82 and governor are closed in pipeline 72 to guide vane servomotor and is compensated.
2. turbine-generator units revolving speed is excessively high or low-voltage occurs, the operation that guide vane governor closes water distributor is lost
Spirit.
A kind of settling mode is direct operation hand-operated direction valve 10, and hand-operated direction valve 10 be in left position and works, P1Mouth is in
Blocked state, T1Mouth and B1Mouth communicates and leads directly to fuel tank, and solenoid directional control valve 20 is in right position work, but due to control oil
It can not be from P1Mouth enters, and the spool of the mechanical commutation valve 30 is moved to the left under the reduction of spring force, mechanical commutation valve 30
It works in right position, i.e. T3Mouth and B3Mouth communicates, P3Mouth and A3Mouth communicates；
From P3Mouth is passed through operation oil circuit 104, and operation oil passes through A3Mouth enters the inlet of the opening and closing inserted valve 60, downwards
The spool for pushing down the opening and closing inserted valve 60 makes the lower mouth closure for opening and closing inserted valve 60, that is, cuts off the company with guide vane governor 70
It is logical；The B3It mouthful is connected to the inlet of the adjustable inserted valve 50 of the flow, i.e., described flow is adjustable inserted valve 50 is through B3Mouth and T3
Mouth is passed through 40 oil return of oil leak storage box；
Flow is adjustable, and inserted valve 50 connects the progress oil return of oil leak storage box 40, and guide vane servomotor opens chamber 81 and flow can
The liquid outlet connection of inserted valve 50 is adjusted, servomotor piston rod 83, which moves downward, under the active force of weight gravity closes servomotor
It closes, opens adjustable 50 inner spool of inserted valve of flow and connect oil return, it can be adjustable by adjusting flow within the servomotor shut-in time
The displacement and maximum opening of 50 spool of inserted valve, to achieve the purpose that control flow.
Another settling mode is after solenoid directional control valve 20 receives signalizing activity commutation, and solenoid directional control valve 20 is in left position
Work, P2Mouth and B2Mouth communicates, T2Mouth and A2Mouth communicates, T2Mouth is communicated with oil leak storage box 40, from P1The control oil warp that mouth is passed through
Cross B1Mouth is passed through B3Mouthful after be in blocked state, with the spool of the mechanical commutation valve 30 under the reduction of spring force to the left
Mobile, mechanical commutation valve 30 is in the work of right position, i.e. T3Mouth and B3Mouth communicates, P3Mouth and A3Mouth communicates；
From P3Mouth is passed through operation oil circuit 104, and operation oil passes through A3Mouth enters the inlet of the opening and closing inserted valve 60, downwards
The spool for pushing down the opening and closing inserted valve 60 makes the lower mouth closure for opening and closing inserted valve 60, that is, cuts off the company with guide vane governor 70
It is logical；The B3It mouthful is connected to the inlet of the adjustable inserted valve 50 of the flow, i.e., described flow is adjustable inserted valve 50 is through B3Mouth and T3
Mouth is passed through 40 oil return of oil leak storage box；
Flow is adjustable, and inserted valve 50 connects the progress oil return of oil leak storage box 40, and guide vane servomotor opens chamber 81 and flow can
The liquid outlet connection of inserted valve 50 is adjusted, servomotor piston rod 83, which moves downward, under the active force of weight gravity closes servomotor
It closes, opens adjustable 50 inner spool of inserted valve of flow and connect oil return, it can be adjustable by adjusting flow within the servomotor shut-in time
The displacement and maximum opening of 50 spool of inserted valve, to achieve the purpose that control flow.
The above, the only preferred embodiment of the utility model not make in any form the utility model
Limitation；The those of ordinary skill of all industry can be shown in by specification attached drawing and described above and swimmingly to implement this practical
It is novel；But all those skilled in the art are not departing within the scope of technical solutions of the utility model, using being taken off above
The technology contents shown and the equivalent variations of a little variation, modification and evolution made, are the equivalent embodiment of the utility model；
Meanwhile it the change of all substantial technological any equivalent variationss to the above embodiments according to the utility model, modifying and drilling
Become etc., within the protection scope for still falling within the technical solution of the utility model.
Claims (5)
1. a kind of weight closing type hydraulic system, which is characterized in that the hydraulic system (100) include solenoid directional control valve (20),
Mechanical commutation valve (30), oil leak storage box (40), flow is adjustable inserted valve (50), opening and closing inserted valve (60), guide vane governor
(70), guide vane servomotor (80), weight (101), operation oil circuit (104) and control oil circuit (105)；
The solenoid directional control valve (20) is two-position four-way solenoid directional control valve, and the solenoid directional control valve (20) is equipped with P2Mouth, T2Mouthful,
A2Mouth and B2Mouthful, the P2Mouth is connected to the control oil circuit (105), the T2Mouth is connected to the oil leak storage box (40), institute
State B2Mouth is in blocked state, the A2Mouth is connected to one end of the cavity in the mechanical commutation valve (30), the mechanical commutation
The other end of cavity in valve (30) is connected to the oil leak storage box (40), and the mechanical commutation valve (30) is equipped with P3Mouth, T3
Mouth, A3Mouth and B3Mouthful, the P3Mouth is connected to the operation oil circuit (104), the T3Mouth connects with the oil leak storage box (40)
It is logical, the A3Mouth is connected to the inlet of opening and closing inserted valve (60), the B3Mouth and the adjustable inserted valve of the flow (50)
Inlet connection, the opening and closing inserted valve (60) are equipped with the first liquid outlet and the second liquid outlet, the guide vane governor (70)
It is equipped with governor and opens pipeline (71) and governor closing pipeline (72), be equipped with guide vane relay in the guide vane servomotor (80)
Device opens chamber (81), guide vane servomotor closes chamber (82) and servomotor piston rod (83), and the guide vane servomotor opens chamber (81)
And the guide vane servomotor closes the two sides that chamber (82) are located at the servomotor piston rod (83), the opening and closing inserted valve
(60) guide vane of the liquid outlet of the first liquid outlet and the adjustable inserted valve of the flow (50) with the guide vane servomotor (80)
Servomotor opens chamber (81) connection, and one end of the servomotor piston rod (83) is fixed with the weight (101), and the opening and closing is inserted
The second liquid outlet and the governor for filling valve (60) are opened pipeline (71) and are connected to, governor closing pipeline (72) with it is described
Guide vane servomotor closes chamber (82) connection.
2. a kind of weight closing type hydraulic system according to claim 1, which is characterized in that the hydraulic system (100) is also
Including check valve (102) and oil return tank of speed controller (103), is closed in the governor and be equipped with a branch, institute on pipeline (72)
Branch is stated to be connected to by the check valve (102) with the oil return tank of speed controller (103).
3. a kind of weight closing type hydraulic system according to claim 2, which is characterized in that check valve (102) installation
In the lower section of the oil return box.
4. a kind of weight closing type hydraulic system according to claim 1, which is characterized in that the hydraulic system (100) is also
Including fixed pulley (90), one end of the servomotor piston rod (83) is solid by the fixed pulley (90) and the weight (101)
Fixed connection.
5. -4 any a kind of weight closing type hydraulic system according to claim 1, which is characterized in that the hydraulic system
It (100) further include hand-operated direction valve (10), the hand-operated direction valve (10) is two position three way directional control valve, the hand-operated direction valve
(10) P1 mouthfuls, T1 mouthfuls and B1 mouthfuls are equipped with, described P1 mouthfuls is connected to the control oil circuit (105), and described T1 mouthfuls is connected to fuel tank,
Described B1 mouthfuls is connected to described P2 mouthfuls.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821725212.6U CN209228750U (en) | 2018-10-24 | 2018-10-24 | A kind of weight closing type hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821725212.6U CN209228750U (en) | 2018-10-24 | 2018-10-24 | A kind of weight closing type hydraulic system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209228750U true CN209228750U (en) | 2019-08-09 |
Family
ID=67500704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821725212.6U Active CN209228750U (en) | 2018-10-24 | 2018-10-24 | A kind of weight closing type hydraulic system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209228750U (en) |
-
2018
- 2018-10-24 CN CN201821725212.6U patent/CN209228750U/en active Active
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