CN110937541B - Winch hydraulic system using O-shaped median function reversing valve - Google Patents
Winch hydraulic system using O-shaped median function reversing valve Download PDFInfo
- Publication number
- CN110937541B CN110937541B CN201911387344.1A CN201911387344A CN110937541B CN 110937541 B CN110937541 B CN 110937541B CN 201911387344 A CN201911387344 A CN 201911387344A CN 110937541 B CN110937541 B CN 110937541B
- Authority
- CN
- China
- Prior art keywords
- oil
- valve
- port
- hydraulic
- oil port
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000003921 oil Substances 0.000 claims description 300
- 230000007935 neutral effect Effects 0.000 claims description 13
- 238000007599 discharging Methods 0.000 claims description 10
- 239000010720 hydraulic oil Substances 0.000 claims description 9
- 238000011144 upstream manufacturing Methods 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 abstract description 2
- 230000007547 defect Effects 0.000 abstract description 2
- 230000001502 supplementing effect Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D5/00—Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
- B66D5/02—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes
- B66D5/24—Operating devices
- B66D5/26—Operating devices pneumatic or hydraulic
- B66D5/28—Operating devices pneumatic or hydraulic specially adapted for winding gear, e.g. in mining hoists
-
- 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
-
- 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
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/0401—Valve members; Fluid interconnections therefor
-
- 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
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
- F15B20/007—Overload
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/50—Pressure control
- F15B2211/505—Pressure control characterised by the type of pressure control means
- F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
- F15B2211/50518—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using pressure relief valves
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/80—Other types of control related to particular problems or conditions
- F15B2211/86—Control during or prevention of abnormal conditions
- F15B2211/863—Control during or prevention of abnormal conditions the abnormal condition being a hydraulic or pneumatic failure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2121/00—Type of actuator operation force
- F16D2121/02—Fluid pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2125/00—Components of actuators
- F16D2125/02—Fluid-pressure mechanisms
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention provides a winch hydraulic system using an O-shaped median function reversing valve, which is formed by connecting an O-shaped median function reversing valve (21), a shuttle valve II (22), a load release valve (23), a shuttle valve I (13), a balance valve group (14), a winch motor (17), a brake (18) and a hydraulic valve (19) with a pressure reducing valve (10). The invention uses the O-shaped median function reversing valve to replace the existing Y-shaped median function reversing valve for a hydraulic control system of a winch, and adds the shuttle valve II and the load release valve, and the shuttle valve II and the load release valve are connected to the original valve group through simple pipelines, thereby solving the defect that a brake generated when the O-shaped median function reversing valve is used on the hydraulic control system of the winch cannot lock a hydraulic motor in time, and being capable of replacing the Y-shaped median function reversing valve to finish the hydraulic transmission and control functions of the winch under the condition that the Y-shaped median function reversing valve cannot be used or is limited in use, and having strong adaptability and low cost.
Description
Technical Field
The invention relates to a hydraulic control system of a piling machine, in particular to a hydraulic system of a winch using an O-shaped median function reversing valve.
Background
With the continuous development of piling machinery, many pile presses are equipped with windlass, windlass is generally used for lifting or descending a drill rod, the windlass adopts a hydraulic motor to drive, the existing windlass hydraulic system adopts a Y-shaped median function reversing valve as a main control valve, the existing windlass hydraulic system adopting the Y-shaped median function reversing valve as the main control valve is shown in a schematic diagram of fig. 1, the existing windlass hydraulic system adopting the Y-shaped median function reversing valve as the main control valve comprises a Y-shaped median function reversing valve 12, a shuttle valve I13, a balance valve group 14, a windlass motor 17, a brake 18, a hydraulic valve 19 and a pressure reducing valve 10, when the left and right pilot hydraulic ports of the Y-shaped median function reversing valve 12 are not provided with pilot hydraulic signals, the Y-shaped median function reversing valve 12 is positioned in the middle position, at the moment, two working oil ports A and B of the Y-shaped median function reversing valve 12 are communicated with an oil tank, two control ports of the balance valve 14 are not provided with pressure, two working oil-free C and D of the windlass motor are closed, an oil inlet and an oil outlet of the pressure reducing valve 10 are both pressed, the hydraulic oil inlet of the pressure reducing valve 19 is positioned in the left position and the hydraulic oil outlet of the windlass is closed, and the hydraulic oil is released from the left position of the oil tank 18 through the brake 18, and the hydraulic oil is braked by the left and the brake valve 18 is positioned in the left position of the oil tank.
However, sometimes, the limitation of the practical situation is imposed (for example, the stock of the Y-type median function reversing valve is small, and the stock of the O-type median function reversing valve is large), the O-type median function reversing valve is needed to replace the Y-type median function reversing valve as the main control valve of the hydraulic system of the winch when repairing and replacing or producing new machines, but the problem exists that the O-type median function reversing valve directly replaces the Y-type median function reversing valve to be used in the hydraulic system of the winch: when the winch motor is to stop rotating and needs to brake, the O-shaped median function reversing valve is in a neutral position, the working oil ports A and B are not communicated with the oil tank, the balance valve group 14 is in an open state, the oil pressure at the outlet of the pressure reducing valve 10 is large, the hydraulic valve 9 cannot return to the left position, and the brake 18 cannot release pressure through the hydraulic valve, so that the brake cannot lock the winch motor timely, and therefore, in the prior art, a scheme is needed to solve the problem that the O-shaped median function reversing valve directly replaces the Y-shaped median function reversing valve and cannot brake when the Y-shaped median function reversing valve is used in the existing winch hydraulic system.
Disclosure of Invention
The invention aims to provide a winch hydraulic system using an O-shaped median function reversing valve, which aims to solve the problems in the background technology.
The winch hydraulic system comprises an O-shaped neutral position function reversing valve, a shuttle valve II, a load release valve, a shuttle valve I, a balance valve group, a winch motor, a brake, a hydraulic valve and a pressure reducing valve, wherein the O-shaped neutral position function reversing valve is provided with a working oil port A, a working oil port B, an oil return port T 1 communicated with an oil tank and a power oil port P 1 connected with an oil pump, the winch motor is provided with a working oil port C and a working oil port D, the working oil port A is connected with the working oil port C through an oil way L, and the working oil port B is connected with the working oil port D through an oil way M;
The balance valve group is connected between the oil way L and the oil way M, two oil inlets of the shuttle valve I are respectively connected with the oil way L and the oil way M, and the shuttle valve I is positioned at the upstream of the balance valve group when the oil way L and the oil way M are respectively used as oil inlet pipelines of the winch motor;
an oil cavity of the brake is connected with an oil outlet of the pressure reducing valve through an oil way N, an oil inlet of the pressure reducing valve is connected with an oil outlet of the shuttle valve I, and the hydraulic valve is arranged on the oil way N between the brake and the pressure reducing valve;
The hydraulic valve is used for enabling the brake oil cavity to be switched between oil inlet and oil return, and the pressure reducing valve is used for controlling the oil pressure entering the brake oil cavity when the brake oil cavity is filled with oil so as to prevent the brake from being damaged due to overhigh pressure;
The hydraulic valve is provided with an oil port G, an oil port H and an oil port I, wherein the oil port G is connected with an oil cavity of the brake, the oil port H is connected with an oil tank, the oil port I is connected with an oil outlet of the pressure reducing valve, a right pilot oil port of the hydraulic valve is connected to a pipeline between the oil port I and the oil outlet of the pressure reducing valve, when the hydraulic valve is positioned at the left position, the oil port I is blocked, the oil port G is communicated with the oil port H, when the hydraulic valve is positioned at the right position, the oil port H is blocked, and the oil port G is communicated with the oil port I;
The load-discharging valve is provided with an oil port E and an oil port F communicated with the oil tank, the oil port E is connected to a pipeline between the oil inlet of the pressure reducing valve and the oil outlet of the shuttle valve I, when the load-discharging valve is positioned at the left position, the oil port E is disconnected from the oil port F, and when the load-discharging valve is positioned at the right position, the oil port E is connected with the oil port F;
The two oil inlets of the shuttle valve II are respectively connected with the left pilot oil way and the right pilot oil way of the O-shaped median function reversing valve, the oil outlet of the shuttle valve II is connected with the left pilot oil way of the relief valve, when the winch motor needs to stop and the O-shaped median function reversing valve is switched from left position or right position to the median position, the pilot hydraulic signals of the left pilot oil way and the right pilot oil way of the O-shaped median function reversing valve are cut off, the relief valve is not operated and is positioned at the right position at the moment, the oil inlet of the relief valve is communicated with the oil tank, the hydraulic valve returns to the left position at the moment, hydraulic oil in the brake oil cavity returns to the oil tank through the left position of the hydraulic valve, and pressure oil at the side with higher oil pressure in the working oil port A and the working oil port B returns to the oil tank through the relief valve.
Furthermore, the winch hydraulic system using the O-shaped median function reversing valve comprises a safety valve and an oil supplementing valve, wherein the safety valve and the oil supplementing valve are both connected between an oil way L and an oil way M, and the balance valve group is positioned at the upstream of the safety valve and the oil supplementing valve when the oil way L and the oil way M are respectively used as oil inlet pipelines of a winch motor.
Preferably, the left and right pilot oil paths of the O-type meso-position function reversing valve provide pilot hydraulic signals through a hydraulic handle, and the hydraulic handle is provided with a power oil port P 2 connected with pressure oil and an oil return port T 2 connected with an oil tank.
The invention has at least the following beneficial effects:
the invention uses the O-shaped median function reversing valve to replace the existing Y-shaped median function reversing valve for a hydraulic control system of a winch, and adds the shuttle valve II and the load release valve, and the shuttle valve II and the load release valve are connected to the original valve group through simple pipelines, thereby solving the defect that a brake cannot release pressure and can not lock a hydraulic motor in time when the O-shaped median function reversing valve is used in the valve group which can be generated on the hydraulic control system of the winch, and being capable of effectively replacing the Y-shaped median function reversing valve to complete the hydraulic transmission and control functions of the winch under the condition that the Y-shaped median function reversing valve cannot be used or is limited in use, and having strong adaptability and low cost.
In addition to the objects, features and advantages described above, the present invention has other objects, features and advantages. The present invention will be described in further detail with reference to the drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:
FIG. 1 is a schematic diagram of a conventional hoist hydraulic system using Y-type neutral position reversing valves;
fig. 2 is a schematic diagram of a hoist hydraulic system using an O-type neutral function reversing valve in accordance with a preferred embodiment of the present invention.
In the figure: 10-reducing valve, 12-Y-type median function reversing valve, 13-shuttle valve I, 14-balance valve group, 17-hoist motor, 18-brake, 19-hydraulic valve, 20-hydraulic handle, 21-O-type median function reversing valve, 22-shuttle valve II, 23-relief valve, 24-oil tank, 25-relief valve and 26-oil supplementing valve.
Detailed Description
Embodiments of the invention are described in detail below with reference to the attached drawings, but the invention can be implemented in a number of different ways, which are defined and covered by the claims.
Referring to fig. 2, a hydraulic system of a winch using an O-type neutral position function reversing valve comprises an O-type neutral position function reversing valve 21, a shuttle valve two 22, a load release valve 23, a shuttle valve one 13, a balance valve group 14, a safety valve 25, an oil supplementing valve 26, a winch motor 17, a brake 18, a hydraulic valve 19 and a pressure reducing valve 10, wherein the O-type neutral position function reversing valve 21 is provided with a working oil port a, a working oil port B, an oil return port T 1 communicated with an oil tank 24 and a power oil port P 1 connected with an oil pump, the winch motor is provided with a working oil port C and a working oil port D, the working oil port a is connected with the working oil port C through an oil path L, and the working oil port B is connected with the working oil port D through an oil path M.
The two oil inlets of the first shuttle valve 13 are respectively connected with the oil path L and the oil path M, the balance valve group 14, the safety valve 25 and the oil compensating valve 26 are respectively connected between the oil path L and the oil path M, when the oil path L and the oil path M are respectively used as oil inlet pipelines of a hoisting motor, the balance valve group 14 is positioned at the upstream of the safety valve 15 and the oil compensating valve 26, and the first shuttle valve 13 is positioned at the upstream of the balance valve group 14.
Specifically, when the oil path L is in oil feeding and the oil path M is in oil feeding, the working oil port C of the winch motor is in oil feeding and the working oil port D of the winch motor is in oil feeding, the balance valve on the right side of the balance valve group 14 is opened, hydraulic oil flowing out of the working oil port D flows into the oil tank through the balance valve on the right side, and in addition, part of hydraulic oil in the oil path L flows into the oil cavity of the brake through the shuttle valve I, the pressure reducing valve 10 and the hydraulic valve 19, so that the brake releases the locking of the winch motor. Conversely, when the winch motor rotates in the direction of changing, the oil way M is required to enter and return oil from the oil way L, and the principle is the same as that of the oil way L.
The safety valve 25 mainly plays a role in preventing the system pressure from being too high, and the oil supplementing valve 26 is used for supplementing oil lost by the winch motor due to leakage and preventing a mechanism or an object hung by the steel wire rope from stalling and falling due to the fact that the winch motor is empty.
The oil cavity of the brake 18 is connected with the oil outlet of the pressure reducing valve 10 through an oil path N, the oil inlet of the pressure reducing valve 10 is connected with the oil outlet of the shuttle valve I13, and the hydraulic valve 19 is arranged on the oil path N between the brake and the pressure reducing valve 10.
The hydraulic valve is used for enabling the brake oil cavity to be switched between oil inlet and oil return, and the pressure reducing valve is used for controlling oil pressure entering the brake oil cavity when the brake oil cavity is filled with oil, so that the brake is prevented from being damaged due to the fact that the pressure is too high.
In this embodiment, the hydraulic valve 19 is a two-position three-way pilot operated directional valve, the hydraulic valve is provided with an oil port G, an oil port H and an oil port I, the oil port G is connected with an oil cavity of the brake 18, the oil port H is connected with an oil tank, the oil port I is connected with an oil outlet of the pressure reducing valve, a right pilot oil port of the hydraulic valve is connected to a pipeline between the oil port I and the oil outlet of the pressure reducing valve, when the hydraulic valve is positioned at the left position, the oil port I is blocked, the oil port G is communicated with the oil port H, when the hydraulic valve is positioned at the right position, the oil port H is blocked, and the oil port G is communicated with the oil port I.
In this embodiment, the load-discharging valve 23 is a two-position two-way reversing valve with a pilot control port at two left positions, the load-discharging valve 23 is provided with an oil port E and an oil port F for communicating with an oil tank, the oil port E is connected to a pipeline between the oil inlet of the pressure reducing valve 10 and the oil outlet of the shuttle valve one 13, when the load-discharging valve 23 is located at the left position, the oil port E is disconnected from the oil port F, and when the load-discharging valve 23 is located at the right position, the oil port E is connected to the oil port F.
The two oil inlets of the shuttle valve II 22 are respectively connected with the left and right pilot oil paths of the O-shaped median function reversing valve, the oil outlet of the shuttle valve II 22 is connected with the left pilot oil path of the relief valve 23, when the winch motor needs to stop and the O-shaped median function reversing valve is switched from left or right to the median, the pilot hydraulic signals of the left and right pilot oil paths of the O-shaped median function reversing valve are cut off, the relief valve 23 is not operated and is positioned at the right, the oil inlet of the relief valve 10 is communicated with an oil tank, the oil outlet of the relief valve 10 does not have oil pressure to drive the hydraulic valve, the hydraulic valve 19 returns to the left at the moment, the oil cavity of the brake 18 returns, and hydraulic oil flowing out from the oil cavity of the brake 18 returns to the oil tank through the left position of the hydraulic valve. At this time, the pressure oil on the side with higher oil pressure in the working oil port a and the working oil port B returns to the oil tank through the shuttle valve one 13 and the relief valve 23, and the function is the same as the effect of the Y-position function reversing valve.
When the motor is required to rotate, a pilot hydraulic signal is arranged on a left pilot oil path or a right pilot oil path of the O-shaped median function reversing valve, the left pilot pressure oil or the right pilot pressure oil of the O-shaped median function reversing valve is divided into two paths, one path is used for driving the O-shaped median function reversing valve, the other path is used for driving the load release valve 23 through the shuttle valve II 22, so that the load release valve 23 is switched to the left position, namely, the connection between an oil inlet of the pressure release valve 10 and an oil tank is cut off, the hydraulic valve 19 is switched to the right position, an oil cavity of a brake is filled with oil, and the brake is released from braking.
In this embodiment, the left and right pilot oil paths of the O-type neutral position function switching valve provide pilot hydraulic signals through the hydraulic handle 20, and the hydraulic handle 20 is provided with a power oil port P 2 connected with pressure oil and an oil return port T 2 connected with an oil tank.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. The hydraulic system of the winch using the O-shaped median function reversing valve is characterized by comprising the O-shaped median function reversing valve (21), a shuttle valve II (22), a load release valve (23), a shuttle valve I (13), a balance valve group (14), a winch motor (17), a brake (18), a hydraulic valve (19) and a pressure reducing valve (10), wherein the O-shaped median function reversing valve is provided with a working oil port A and a working oil port B, the winch motor is provided with a working oil port C and a working oil port D, the working oil port A is connected with the working oil port C through an oil way L, and the working oil port B is connected with the working oil port D through an oil way M;
The balance valve group is connected between the oil way L and the oil way M, two oil inlets of the shuttle valve I are respectively connected with the oil way L and the oil way M, and the shuttle valve I is positioned at the upstream of the balance valve group when the oil way L and the oil way M are respectively used as oil inlet pipelines of the winch motor;
an oil cavity of the brake is connected with an oil outlet of the pressure reducing valve through an oil way N, an oil inlet of the pressure reducing valve is connected with an oil outlet of the shuttle valve I, and the hydraulic valve is arranged on the oil way N between the brake and the pressure reducing valve;
The hydraulic valve is used for enabling the brake oil cavity to be switched between oil inlet and oil return, and the pressure reducing valve is used for controlling the oil pressure entering the brake oil cavity when the brake oil cavity is filled with oil so as to prevent the brake from being damaged due to overhigh pressure;
The hydraulic valve is provided with an oil port G, an oil port H and an oil port I, wherein the oil port G is connected with an oil cavity of the brake, the oil port H is connected with an oil tank, the oil port I is connected with an oil outlet of the pressure reducing valve, a right pilot oil port of the hydraulic valve is connected to a pipeline between the oil port I and the oil outlet of the pressure reducing valve, when the hydraulic valve is positioned at the left position, the oil port I is blocked, the oil port G is communicated with the oil port H, when the hydraulic valve is positioned at the right position, the oil port H is blocked, and the oil port G is communicated with the oil port I;
The load-discharging valve is provided with an oil port E and an oil port F communicated with the oil tank, the oil port E is connected to a pipeline between the oil inlet of the pressure reducing valve and the oil outlet of the shuttle valve I, when the load-discharging valve is positioned at the left position, the oil port E is disconnected from the oil port F, and when the load-discharging valve is positioned at the right position, the oil port E is connected with the oil port F;
The two oil inlets of the shuttle valve II are respectively connected with the left pilot oil way and the right pilot oil way of the O-shaped median function reversing valve, the oil outlet of the shuttle valve II is connected with the left pilot oil way of the relief valve, when the winch motor needs to stop and the O-shaped median function reversing valve is switched from left position or right position to the median position, the pilot hydraulic signals of the left pilot oil way and the right pilot oil way of the O-shaped median function reversing valve are cut off, the relief valve is not operated and is positioned at the right position at the moment, the oil inlet of the relief valve is communicated with the oil tank, the hydraulic valve returns to the left position at the moment, hydraulic oil in the brake oil cavity returns to the oil tank through the left position of the hydraulic valve, and pressure oil at the side with higher oil pressure in the working oil port A and the working oil port B returns to the oil tank through the relief valve.
2. The hydraulic system of a hoist using an O-type neutral position selector valve according to claim 1, characterized in that the hydraulic system of a hoist using an O-type neutral position selector valve further includes a relief valve (25) and an oil compensating valve (26), both of which are connected between the oil passage L and the oil passage M, and the balance valve group is located upstream of both of the relief valve and the oil compensating valve when the oil passage L and the oil passage M are respectively used as an oil feed line of the hoist motor.
3. The hoist hydraulic system using the O-type neutral position switching valve according to claim 1, characterized in that the left and right pilot oil passages of the O-type neutral position switching valve supply pilot hydraulic signals through a hydraulic handle (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911387344.1A CN110937541B (en) | 2019-12-27 | 2019-12-27 | Winch hydraulic system using O-shaped median function reversing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911387344.1A CN110937541B (en) | 2019-12-27 | 2019-12-27 | Winch hydraulic system using O-shaped median function reversing valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110937541A CN110937541A (en) | 2020-03-31 |
| CN110937541B true CN110937541B (en) | 2024-05-03 |
Family
ID=69913672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911387344.1A Active CN110937541B (en) | 2019-12-27 | 2019-12-27 | Winch hydraulic system using O-shaped median function reversing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110937541B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112744690A (en) * | 2021-01-08 | 2021-05-04 | 上海电气风电集团股份有限公司 | Single-blade lifting appliance transmission device and single-blade lifting appliance |
| CN112777503B (en) * | 2021-02-23 | 2022-05-03 | 三一汽车起重机械有限公司 | Winch device, hydraulic system thereof, use method and operation machine |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2081849A (en) * | 1980-07-14 | 1982-02-24 | Bryne Mek Verksted As | Valve assembly |
| CN2892805Y (en) * | 2006-04-29 | 2007-04-25 | 徐州重型机械有限公司 | Motor rotational speed memory hoisting braker control device |
| CN201686408U (en) * | 2010-05-13 | 2010-12-29 | 卢宇 | Mechanically operated three-pump hydraulic system |
| CN105217508A (en) * | 2014-10-30 | 2016-01-06 | 徐州重型机械有限公司 | A kind of hoist brake control system, method and hoisting crane |
| CN106744452A (en) * | 2016-12-20 | 2017-05-31 | 柳州柳工液压件有限公司 | Hoisting brake system |
| CN211169662U (en) * | 2019-12-27 | 2020-08-04 | 恒天九五重工有限公司 | Winch hydraulic system using O-shaped neutral position function reversing valve |
-
2019
- 2019-12-27 CN CN201911387344.1A patent/CN110937541B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2081849A (en) * | 1980-07-14 | 1982-02-24 | Bryne Mek Verksted As | Valve assembly |
| CN2892805Y (en) * | 2006-04-29 | 2007-04-25 | 徐州重型机械有限公司 | Motor rotational speed memory hoisting braker control device |
| CN201686408U (en) * | 2010-05-13 | 2010-12-29 | 卢宇 | Mechanically operated three-pump hydraulic system |
| CN105217508A (en) * | 2014-10-30 | 2016-01-06 | 徐州重型机械有限公司 | A kind of hoist brake control system, method and hoisting crane |
| CN106744452A (en) * | 2016-12-20 | 2017-05-31 | 柳州柳工液压件有限公司 | Hoisting brake system |
| CN211169662U (en) * | 2019-12-27 | 2020-08-04 | 恒天九五重工有限公司 | Winch hydraulic system using O-shaped neutral position function reversing valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110937541A (en) | 2020-03-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103047207B (en) | Flow dividing and collecting valve bank, hydraulic system, load sensitive type hydraulic system and engineering machine | |
| CN102874704B (en) | Hydraulic system, hoisting mechanism and engineering machinery | |
| CN202251199U (en) | Electro-hydraulic proportional combined maneuvering valve | |
| CN110937541B (en) | Winch hydraulic system using O-shaped median function reversing valve | |
| CN102995680B (en) | Hydraulic bucket rod control circuit for hydraulic excavating machine | |
| CN211169662U (en) | Winch hydraulic system using O-shaped neutral position function reversing valve | |
| JP2006329341A (en) | Hydraulic control unit of working machine | |
| CN101230870A (en) | Flow-control module of crane executing mechanism | |
| CN104564885A (en) | High-integration bidirectional rotary valve for pilot control mode | |
| CN106315442A (en) | Automatic cable arranging hydraulic control system for cable dragging machine | |
| WO2016092809A1 (en) | Hydraulic drive system for construction machinery | |
| CN102829011A (en) | Double-pump confluence hydraulic loop combined valve and application thereof | |
| CN219672958U (en) | Hydraulic traveling driving system applied to digging and anchoring machine and digging and anchoring machine | |
| CN115370628A (en) | Rotary hydraulic system, rotary device and working machine | |
| CN105805074A (en) | Three-pump confluence multi-way valve block and hydraulic excavator | |
| JP5481853B2 (en) | Hydraulic circuit for construction machinery | |
| CN112112867B (en) | Hydraulic control type exhaust valve unit, hydraulic control type exhaust winch control system and winch | |
| CN103511379A (en) | Crane, hydraulic system and change-over valve | |
| CN202176562U (en) | Electro-hydraulic speed control valve | |
| CN105422530A (en) | Pilot integrated multi-way valve group and crane | |
| CN102659049B (en) | Dual-winch hydraulic control system and engineering machine | |
| CN202251166U (en) | Pilot oil control loop | |
| CN207864488U (en) | A kind of control valve group for brake release | |
| CN220378586U (en) | Electrohydraulic intelligent continuous oil pipe hydraulic integrated valve group | |
| CN203532380U (en) | Crane, hydraulic system and changeover valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |