CN114014191B - Hydraulic system of double-insurance winch - Google Patents
Hydraulic system of double-insurance winch Download PDFInfo
- Publication number
- CN114014191B CN114014191B CN202111466733.0A CN202111466733A CN114014191B CN 114014191 B CN114014191 B CN 114014191B CN 202111466733 A CN202111466733 A CN 202111466733A CN 114014191 B CN114014191 B CN 114014191B
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- China
- Prior art keywords
- brake
- valve
- oil
- winch
- emergency
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
- B66D1/02—Driving gear
- B66D1/08—Driving gear incorporating fluid motors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
- B66D1/02—Driving gear
- B66D1/14—Power transmissions between power sources and drums or barrels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
- B66D1/28—Other constructional details
- B66D1/30—Rope, cable, or chain drums or barrels
- B66D1/34—Attachment of ropes or cables to drums or barrels
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- 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
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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
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- 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
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- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Fluid-Pressure Circuits (AREA)
- Control And Safety Of Cranes (AREA)
Abstract
The invention provides a hydraulic system of a double-insurance winch, which comprises a brake hydraulic system, wherein the brake hydraulic system comprises an oil tank, an output oil circuit, a brake oil circuit and an emergency oil circuit; a brake oil way is arranged between the oil tank and the output oil way, and the brake oil way comprises a first brake valve group and a second brake valve group; the first brake valve bank comprises a first brake shuttle valve and a first brake pressure reducing valve, the second brake valve bank comprises a second brake shuttle valve, a second brake pressure reducing valve and a brake regulating valve bank, one end of the first brake shuttle valve is connected with a lifting port, the other end of the second brake shuttle valve is connected with a descending port, the third end of the second brake shuttle valve is connected with the brake regulating valve bank, the brake regulating valve bank is also connected with the second brake valve, and a second brake pressure reducing valve is arranged between the third end of the second brake shuttle valve and the brake regulating valve bank; the first brake valve and the second brake valve are adopted for brake control, so that the stability of braking is further enhanced.
Description
Technical Field
The invention relates to the technical field of winch brake safety, in particular to a hydraulic system of a double-insurance winch.
Background
The winch is a light and small hoisting device for hoisting or pulling heavy objects by winding a steel wire rope or a chain by using a winding drum, and is generally provided with a safety protection device for playing a role in safety protection when the winch does not work or when a power source suddenly fails during the working process of the winch.
The existing winch safety protection device comprises a brake disc, a hydraulic cylinder driving the brake disc to act and a control oil way controlling the hydraulic cylinder to act. When the hydraulic motor for driving the winch fails, the control oil way controls the hydraulic oil cylinder to drive the brake disc to act, the winch realizes braking, and the heavy object is prevented from falling from the air, so that the effect of safety protection is achieved.
When the crane has the requirement of hanging people, according to the standard requirement of an ABS class society, a set of brake system is additionally added to the winch, and a brake control oil way of the winch is independent of a brake control oil way of an original reduction gearbox, so that two brake functions are abnormal when the original brake oil way is abnormal.
Disclosure of Invention
The invention provides a hydraulic system of a double-insurance winch, which is provided with two sets of braking systems with different control oil ways, so that the stability of braking is further enhanced, when a winch hangs a person, if one of the oil ways of the braking valve is abnormal, the other braking valve can also realize braking control, so that the personnel safety problem of the winch when the winch hangs the person is ensured, and the hydraulic system is provided with an emergency function, so that the normal operation of the braking function can be ensured when the oil ways cannot normally supply oil.
In order to achieve the above purpose, the technical scheme of the invention is as follows: the hydraulic system of the double-insurance winch comprises a brake hydraulic system, wherein the brake hydraulic system comprises an oil tank, an output oil circuit, a brake oil circuit and an emergency oil circuit; and a brake oil circuit is arranged between the oil tank and the output oil circuit, and the brake oil circuit comprises a first brake valve group and a second brake valve group.
And the oil tank is provided with a lifting port, a descending port, an oil drainage port and an emergency port.
The output oil circuit comprises a winch motor and a brake valve, the winch motor is connected with an oil tank, the brake valve is arranged on the winch motor, the brake oil circuit drives the brake valve to be arranged, and the brake valve comprises a first brake valve and a second brake valve.
The first brake valve group comprises a first brake shuttle valve and a first brake pressure reducing valve, one end of the first brake shuttle valve is connected with a lifting port, the other end of the first brake shuttle valve is connected with a descending port, the third end of the first brake shuttle valve is connected with the first brake valve, and the first brake pressure reducing valve is arranged between the third end of the first brake shuttle valve and the first brake valve.
Above setting, when the winch plays to rise and need loosen the brake after the brake, the oil tank passes through to rise the port and exports hydraulic oil to first brake valve, and the one end of first brake shuttle valve can be opened and make the one end intercommunication third end of first brake shuttle valve, and the hydraulic oil that follows to rise the port and export flows to first brake valve through the third end of first brake shuttle valve for first brake valve opens and makes the winch normally rise.
When the winch descends and is braked, the brake is required to be released, the oil tank outputs hydraulic oil to the first brake valve through the descending port, the other end of the first brake shuttle valve is opened to enable the other end of the first brake shuttle valve to be communicated with the third end, and the hydraulic oil output from the descending port flows to the first brake valve through the third end of the first brake shuttle valve to enable the first brake valve to be opened and enable the winch to descend normally.
The second brake valve group comprises a second brake shuttle valve, a second brake pressure reducing valve and a brake regulating valve group, one end of the second brake shuttle valve is connected with a lifting port, the other end of the second brake shuttle valve is connected with a descending port, the third end of the second brake shuttle valve is connected with the brake regulating valve group, the brake regulating valve group is further connected with the second brake valve, and a second brake pressure reducing valve is arranged between the third end of the second brake shuttle valve and the brake regulating valve group.
Above setting, the winch is when the hoist is in the hoist, and the switching-over of brake regulating valve group is blocked the oil circuit between second brake valve and the oil tank for the hydraulic oil in the second brake valve can't flow back to the oil tank, thereby makes the second brake valve be in normally open state always.
When the winch hangs a person, the brake adjusting valve group reverses, and an oil way between the second brake valve and the oil tank is communicated; when the oil tank stops supplying oil to the winch motor, hydraulic oil in the second brake valve normally flows back to the oil tank, so that the normally open second brake valve is closed through the pressing action of the hydraulic oil to realize braking.
When the winch is lifted, the brake is required to be released after the winch is braked, one end of the second brake shuttle valve is opened, so that one end of the second brake shuttle valve is communicated with the third end, hydraulic oil output from the lifting port flows to the brake adjusting valve group through the third end of the second brake shuttle valve, and hydraulic oil flows to the second brake valve through the brake adjusting valve group, so that the second brake valve is opened, and the winch is lifted normally.
When the winch descends, the other end of the second brake shuttle valve is opened, so that the other end of the second brake shuttle valve is communicated with the third end, hydraulic oil output from the descending port flows to the brake adjusting valve group through the third end of the second brake shuttle valve, and hydraulic oil flows to the second brake valve through the brake adjusting valve group to realize braking, so that the second brake valve is opened, and the winch descends normally.
Still be equipped with emergent oil circuit between oil tank and output oil circuit, emergent oil circuit includes first emergent ball valve, second emergent ball valve, third emergent ball valve and emergent oil pump, emergent port is connected to the one end of emergent oil pump, second brake valve is connected to the other end of emergent oil pump, is equipped with first emergent ball valve between the other end of second brake valve and emergent oil pump, is equipped with second emergent ball valve between second brake valve and brake adjusting valve group, and the other end of emergent oil pump still is connected with the other end of first brake shuttle valve through third emergent ball valve, and first emergent ball valve is normally closed with third emergent ball valve, and second emergent ball valve is normally open.
According to the arrangement, when the first brake valve and the second brake valve cannot normally supply oil, the first emergency ball valve and the third emergency ball valve are opened, the second emergency ball valve is closed, and the emergency oil pump conveys hydraulic oil to the second brake valve through the first emergency ball valve so that the second brake valve is opened to release braking; hydraulic oil still flows to the other end of the first brake shuttle valve through the third emergency ball valve, and hydraulic oil flows to the first brake valve from the first brake shuttle valve to enable the first brake valve to be opened so as to achieve the purpose of releasing braking, so that normal operation of a braking function is guaranteed when oil cannot be supplied normally through an emergency oil way.
According to the structure, when the winch normally operates, the oil tank conveys hydraulic oil to the winch motor through the lifting port or the descending port to achieve lifting cable or descending cable of the winch, the first brake valve and the second brake valve are in a normally open state through the action of the hydraulic oil, and when the winch is braked, the lifting port or the descending port stops outputting the hydraulic oil, so that the hydraulic oil in the first brake valve communicated between the oil tank and the winch motor flows back to the oil tank, and the normally open first brake valve is closed through the pressing action of the hydraulic oil originally, so that braking is achieved.
Meanwhile, if the winch is in a cargo lifting state, when the winch is braked, the brake adjusting valve group is switched to block an oil way between the second brake valve and the oil tank, so that hydraulic oil in the second brake valve cannot flow back to the oil tank when the oil tank stops supplying oil to the winch motor, and the second brake valve is always in a normally open state, and therefore brake control is achieved by adopting the first brake valve when the winch is lifted.
If the winch is in a man-hanging state, when the winch is braked, the brake adjusting valve is switched over, an oil way between the second brake valve and the oil tank is communicated, therefore, when the oil tank stops supplying oil to the winch motor, hydraulic oil in the second brake valve normally flows back to the oil tank, so that the normally open second brake valve is closed through the pressing action of the hydraulic oil originally, meanwhile, the first brake valve is also synchronously closed, the first brake valve and the second brake are both braked, the winch can adopt the first brake valve and the second brake valve to carry out brake control when the winch is hoisted, the stability of the brake is further enhanced, and when the winch is hoisted, if one brake valve oil way is abnormal, the other brake valve can also realize brake control, and the personnel safety problem when the winch is hoisted is guaranteed.
Further, the lifting port is connected with one end of the winch motor through a lifting oil pump, the descending port is connected with the other end of the winch motor through a descending oil pump, and the oil drain end of the winch motor is connected with the oil drain port. According to the arrangement, when the winch is lifted, the lifting oil pump outputs hydraulic oil from the oil tank to the winch motor and flows back to the oil tank through the oil drain port to form a circulating oil path so as to realize lifting action of the winch; when the winch descends, the descending oil pump outputs hydraulic oil from the oil tank to the winch motor and flows back to the oil tank through the oil drain port to form a circulating oil path so as to realize the descending action of the winch.
Further, the brake adjusting valve group comprises a brake adjusting reversing valve, a brake adjusting shuttle valve and a brake adjusting one-way valve, the second brake reducing valve is connected with the P end of the brake adjusting reversing valve, the A end of the brake adjusting reversing valve is connected with one end of the brake adjusting shuttle valve, the T end of the brake adjusting reversing valve is connected with a drain port, the B end of the brake adjusting reversing valve is connected with one end of the brake adjusting one-way valve, the other end of the brake adjusting one-way valve is connected with the other end of the brake adjusting shuttle valve, and the third end of the brake adjusting shuttle valve is connected with the second brake valve; and a second emergency ball valve is arranged between the third end of the brake adjusting shuttle valve and the second brake valve.
The hydraulic oil can flow to the second brake valve through the brake adjusting reversing valve, so that the second brake valve is kept in a normally open state; when the winch is used for lifting goods and braking, the oil tank stops supplying oil to the winch motor, the first brake valve is normally closed to realize braking, and a brake adjusting one-way valve is arranged between the end B of the brake adjusting reversing valve and the brake adjusting shuttle valve, and the other end of the brake adjusting shuttle valve is communicated with the third end, so that one end of the brake adjusting shuttle valve is blocked, hydraulic oil in the second brake valve is blocked and cannot normally flow back to the oil tank under the unidirectional circulation effect of the brake adjusting one-way valve, and therefore the condition that the second brake valve is kept normally open during lifting goods is ensured.
When the winch hangs a person, the brake adjusting reversing valve reverses, so that the P end of the brake adjusting reversing valve is communicated with the A end, and one end of the vehicle adjusting shuttle valve is communicated with the third end, therefore, hydraulic oil can flow to the second brake valve through the brake adjusting reversing valve, and the second brake valve is kept in a normally open state; when the winch hangs a person and brakes, the oil tank stops supplying oil to the winch motor, the first brake valve is normally closed to realize braking, and meanwhile, the second brake valve is communicated with the brake adjusting reversing valve, so that hydraulic oil in the second brake valve can normally flow back to the oil tank through the end A and the end P of the brake adjusting reversing valve, and therefore the first brake valve and the second brake valve can both brake, when the winch hangs a person, the winch is guaranteed to be in a state that one brake valve oil path is abnormal, the other brake valve can also realize brake control, and personnel safety problem when the winch hangs a person is guaranteed.
Further, a balance valve bank is arranged between the lifting port and the winch motor, the balance valve bank comprises a balance pressure reducing valve and a balance one-way valve, one end of the balance pressure reducing valve is connected with the lifting port, the other end of the balance pressure reducing valve is connected with the winch motor, the balance one-way valve and the balance pressure reducing valve are arranged in parallel, and therefore the balance pressure reducing valve bank is arranged, so that when the winch is lifted, hydraulic oil flowing to the winch motor from an oil tank is stable, and fluctuation of flow speed is not too large.
Drawings
FIG. 1 is a schematic illustration of a brake hydraulic system of the present invention.
Fig. 2 is a schematic structural view of the winch of the present invention.
Fig. 3 is an enlarged view at C in fig. 1.
Fig. 4 is an enlarged view of D in fig. 1.
Fig. 5 is an enlarged view at E in fig. 1.
Fig. 6 is an enlarged view at F in fig. 2.
Detailed Description
The invention is described in further detail below with reference to the drawings and the detailed description.
As shown in fig. 1 to 6, a hydraulic system of a double-insurance winch includes a brake hydraulic system 1, the brake hydraulic system 1 being used for controlling a winch 2.
As shown in fig. 1, the brake hydraulic system 1 comprises an oil tank 11, an output oil circuit 3, a brake oil circuit 4 and an emergency oil circuit 5; a brake oil circuit 4 is arranged between the oil tank 11 and the output oil circuit 3, and the brake oil circuit 4 comprises a first brake valve group 6 and a second brake valve group 7.
The oil tank 11 is provided with a lifting port 12, a descending port 13, a drain port 14 and an emergency port 15.
The output oil circuit 3 comprises a winch motor 31 and a brake valve 32, the winch motor 31 is connected with the oil tank 11, the brake valve 32 is arranged on the winch motor 31, the brake oil circuit 4 drives the brake valve 32 to be arranged, the winch motor 31 drives the winch 2 to be arranged, and the brake valve 32 comprises a first brake valve 321 and a second brake valve 322. As shown in fig. 1 and 3, the first brake valve group 6 includes a first brake shuttle valve 61 and a first brake pressure reducing valve 62, one end 611 of the first brake shuttle valve 61 is connected to the lifting port 12, the other end 612 of the first brake shuttle valve 61 is connected to the descending port 13, the third end 613 of the first brake shuttle valve 61 is connected to the first brake valve 321, and the first brake pressure reducing valve 62 is disposed between the third end 613 of the first brake shuttle valve 61 and the first brake valve 321.
In this embodiment, the brake valve is opened and closed by pressing a spring disposed in the brake valve through the hydraulic oil flowing into the brake valve, the spring is compressed under the condition of hydraulic oil so that the brake valve is opened, when hydraulic oil flows back, the brake valve is not filled with hydraulic oil, and the spring disposed in the brake valve can close the brake valve through rebound, so that the brake component is driven to realize braking, and specific braking is not described in detail below.
Above setting, when the brake needs to be released after the winch 2 is braked when lifted, the oil tank 11 outputs hydraulic oil to the first brake valve 321 through the lifting port 12, one end 611 of the first brake shuttle valve 61 can be opened to enable one end 611 of the first brake shuttle valve 61 to be communicated with the third end 613, and the hydraulic oil output from the lifting port 12 flows to the first brake valve 321 through the third end 613 of the first brake shuttle valve 61 to enable the first brake valve 321 to be opened and enable the winch 2 to be lifted normally.
When the winch 2 is braked when descending and then the brake is required to be released, the oil tank 11 outputs hydraulic oil to the first brake valve 321 through the descending port 13, the other end 612 of the first brake shuttle valve 61 is opened so that the other end 612 of the first brake shuttle valve 61 is communicated with the third end 613, and the hydraulic oil output from the descending port 13 flows to the first brake valve 321 through the third end 613 of the first brake shuttle valve 61 so that the first brake valve 321 is opened and the winch descends normally.
As shown in fig. 1, 3 and 5, the second brake valve set 7 includes a second brake shuttle valve 71, a second brake pressure reducing valve 72 and a brake adjusting valve set 73, one end 711 of the second brake shuttle valve 71 is connected to the lifting port 12, the other end 712 of the second brake shuttle valve 71 is connected to the descending port 13, the third end 713 of the second brake shuttle valve 71 is connected to the brake adjusting valve set 73, the brake adjusting valve set 73 is further connected to the second brake valve 322, and the second brake pressure reducing valve 72 is disposed between the third end 713 of the second brake shuttle valve 71 and the brake adjusting valve set 73.
In the arrangement, when the winch 2 is used for hoisting goods, the brake adjusting valve group 73 is reversed, and an oil way between the second brake valve 322 and the oil tank 11 is blocked, so that hydraulic oil in the second brake valve 322 cannot flow back to the oil tank 11, and the second brake valve 322 is always in a normally open state;
when the winch 2 hangs a person, the brake adjusting valve group 73 reverses, and an oil way between the second brake valve 322 and the oil tank 11 is communicated; when the oil tank 11 stops supplying oil to the winch motor 31, the hydraulic oil in the second brake valve 322 normally flows back to the oil tank 11, so that the second brake valve 322 which is normally opened by the pressing action of the hydraulic oil is closed to realize braking.
When the winch 2 is braked when lifted, the brake is required to be released, one end 711 of the second brake shuttle valve 71 is opened, so that one end 711 of the second brake shuttle valve 71 is communicated with the third end 713, hydraulic oil output from the lifting port 12 flows to the brake adjusting valve group 73 through the third end 713 of the second brake shuttle valve 71, and hydraulic oil flows to the second brake valve 322 through the brake adjusting valve group 73, so that the second brake valve 322 is opened, and the winch 2 is lifted normally.
When the winch descends, the other end 712 of the second brake shuttle valve 71 is opened such that the other end 712 of the second brake shuttle valve 71 communicates with the third end 713, hydraulic oil output from the descending port 13 flows to the brake adjusting valve group 73 through the third end 713 of the second brake shuttle valve 71, and hydraulic oil flows to the second brake valve 322 through the brake adjusting valve group 73 to achieve braking, so that the second brake valve 322 is opened and the winch 2 descends normally.
As shown in fig. 1, an emergency oil way 5 is further arranged between the oil tank 11 and the output oil way 3, the emergency oil way 5 comprises a first emergency ball valve 51, a second emergency ball valve 52, a third emergency ball valve 53 and an emergency oil pump 54, one end of the emergency oil pump 54 is connected with the emergency port 15, the other end of the emergency oil pump 54 is connected with a second brake valve 322, the first emergency ball valve 51 is arranged between the second brake valve 322 and the other end of the emergency oil pump 54, the second emergency ball valve 52 is arranged between the second brake valve 322 and the brake regulating valve 73, the other end of the emergency oil pump 54 is also connected with the other end 612 of the first brake shuttle valve 61 through the third emergency ball valve 53, the first emergency ball valve 51 and the third emergency ball valve 53 are normally closed, and the second emergency ball valve 52 is normally open;
in the above arrangement, when the first brake valve 321 and the second brake valve 322 cannot normally supply oil, the first emergency ball valve 51 and the third emergency ball valve 53 are opened, the second emergency ball valve 52 is closed, and the emergency oil pump 54 conveys hydraulic oil to the second brake valve 322 through the first emergency ball valve 52 so that the first emergency ball valve 51 and the third emergency ball valve 53 are opened to realize brake release; hydraulic oil also flows to the other end 612 of the first brake shuttle valve 61 through the third emergency ball valve 53, and hydraulic oil flows from the first brake shuttle valve 61 to the first brake valve 321 to be opened so as to release braking, so that normal operation of a braking function is ensured when oil cannot be supplied normally through the emergency oil path 5.
As shown in fig. 2, the winch 2 includes a drum 21, a drum shaft 22, a first support 23, a second support 24, a reduction gearbox 25 and a drum bearing seat 26, the reduction gearbox 25 is disposed on the first support 23, one end of the drum shaft 22 is connected with the reduction gearbox 25, the other end of the drum shaft 22 is rotatably disposed on the second support 24 through the drum bearing seat 26, the drum 21 is disposed on the drum shaft 22 between the first support 23 and the second support 24, the cable 20 is disposed on the drum 21, and the output oil circuit 3 drives the winch 2 to be disposed.
In the above structure, when the winch 2 is operating normally, the oil tank 11 conveys hydraulic oil to the winch motor 31 through the lifting port 12 or the descending port 13 to realize the lifting cable 20 or the descending cable 20 of the winch 2, the first brake valve 321 and the second brake valve 322 are in a normally open state under the action of the hydraulic oil, and when the winch 2 is braking, the lifting port 12 or the descending port 13 stops outputting the hydraulic oil, so that the hydraulic oil in the first brake valve 321 communicated between the oil tank 11 and the winch motor 31 flows back to the oil tank 11, so that the normally open first brake valve 321 is closed by the pressing action of the hydraulic oil, and braking is realized;
meanwhile, if the winch 2 is in a cargo lifting state, the brake adjusting valve group 73 is switched to block an oil path between the second brake valve 322 and the oil tank 11 during braking, so that hydraulic oil in the second brake valve 322 cannot flow back to the oil tank 11 when the oil tank 11 stops supplying oil to the winch motor 31, and the second brake valve 322 is always in a normally open state, and therefore brake control is achieved by adopting the first brake valve 321 during cargo lifting of the winch 2;
if winch 2 is in the condition of hanging the man, when the brake, brake adjusting valve group 73 switching-over, with the oil circuit intercommunication between second brake valve 322 and the oil tank 11, from this, when oil tank 11 stopped supplying oil for winch motor 31, the hydraulic oil in the second brake valve 322 normally flows back to oil tank 11, thereby make originally realize normally open second brake valve 322 closure through the suppression effect of hydraulic oil, first brake valve 321 is also closed simultaneously, first brake valve 321 and second brake valve 322 all brake simultaneously, above setting, can adopt first brake valve 321 and second brake valve 322 to brake the control simultaneously when the winch hangs the man, further strengthen the stability of brake, and when winch 2 hangs the man, if one of them brake valve oil circuit appears unusual, another brake valve can also realize brake control, personnel safety problem when having guaranteed winch 2 hangs the man.
As shown in fig. 1, the lifting port 12 is connected to one end of the winch motor 31 through a lifting oil pump 121, the lowering port 13 is connected to the other end of the winch motor 31 through a lowering oil pump 131, and the drain end 311 of the winch motor 31 is connected to the drain port 14. In the above arrangement, when the winch 2 is lifted, the lifting oil pump 121 outputs hydraulic oil from the oil tank 11 to the winch motor 31 and flows back to the oil tank 11 through the oil drain port 14 to form a circulating oil path so as to realize lifting action of the winch 2; when the winch 2 descends, the descending oil pump 13 outputs hydraulic oil from the oil tank 11 to the winch motor 31 and flows back to the oil tank 11 through the drain port 14 to form a circulation oil path to effect the descending motion of the winch 2.
As shown in fig. 3, the winch 2 further includes a brake actuator including a first actuator 27 and a second actuator 28, the first actuator 27 is disposed on the reduction gearbox 25 and connected to one end of the spool shaft 22, the second actuator 28 is disposed on the spool bearing seat 26 and connected to the other end of the spool shaft 22, and the brake valve 32 drives the brake actuator. In the above arrangement, when braking, the first brake 27 and the second brake 28 are driven by the brake valve 32 to drive the spool shaft 22 to stop rotating, so as to realize braking, and in this embodiment, the first brake 27 and the second brake 28 are common devices for stopping moving parts, and a specific braking manner is the prior art, which will not be described in detail below.
As shown in fig. 5, the brake control valve group 73 includes a brake control reversing valve 731, a brake control shuttle valve 732, and a brake control one-way valve 733, the second brake pressure reducing valve 72 is connected to a P end of the brake control reversing valve 731, an a end of the brake control reversing valve 731 is connected to one end 7321 of the brake control shuttle valve 732, a T end of the brake control reversing valve 731 is connected to the oil drain port 14, a B end of the brake control reversing valve 731 is connected to one end of the brake control one-way valve 733, the other end of the brake control one-way valve 733 is connected to the other end 7322 of the brake control shuttle valve 732, and a third end 7323 of the brake control shuttle valve 732 is connected to the second brake valve 322; a second ball emergency valve 52 is provided between the third end 7323 of the brake adjusting shuttle valve 732 and the second brake valve 322.
In the above arrangement, when the winch 2 is used for hoisting goods, the YV50 end of the brake adjusting reversing valve 731 is electrically reversed, so that the P end of the brake adjusting reversing valve 731 is communicated with the B end, and the other end 7322 of the brake adjusting shuttle valve 732 is communicated with the third end 7323, therefore, hydraulic oil can flow to the second brake valve 322 through the brake adjusting reversing valve 731, and the second brake valve 322 is kept in a normally open state; when the winch 2 is used for lifting and braking, the oil tank 11 stops supplying oil to the winch motor 31, the first brake valve 321 is normally closed to realize braking, and the brake adjusting check valve 733 is arranged between the end B of the brake adjusting reversing valve 731 and the brake adjusting shuttle valve 732, and the other end 7322 of the brake adjusting shuttle valve 732 is communicated with the third end 7323, so that one end 7321 of the brake adjusting shuttle valve 732 is blocked, and hydraulic oil in the second brake valve 322 is blocked and cannot normally flow back to the oil tank 11 under the unidirectional circulation action of the brake adjusting check valve 733, so that the second brake valve 322 is ensured to maintain a normally open state during lifting.
When the winch hangs a person, the YV51 end of the brake adjusting reversing valve 731 is electrically reversed, so that the P end of the brake adjusting reversing valve 731 is communicated with the A end, and one end 7321 of the brake adjusting shuttle valve 732 is communicated with the third end 7323, therefore, hydraulic oil can flow to the second brake valve 322 through the brake adjusting reversing valve 731, and the second brake valve 322 is kept in a normally open state; when the winch hangs and brakes, the oil tank 11 stops supplying oil to the winch motor 31, the first brake valve 311 is normally closed to realize braking, and meanwhile, the second brake valve 322 is communicated with the brake adjusting reversing valve 731, so that hydraulic oil in the second brake valve 322 can normally flow back to the oil tank 11 through the end A and the end P of the brake adjusting reversing valve 731, and therefore, the first brake valve 321 and the second brake valve 322 can both brake, when the winch hangs, the situation that if one brake valve oil path is abnormal, the other brake valve can also realize brake control is ensured, and the personnel safety problem when the winch 2 hangs is ensured.
As shown in fig. 1, a balance valve group 10 is arranged between a lifting port 12 and a winch motor 31, the balance valve group 10 comprises a balance pressure reducing valve 101 and a balance one-way valve 102, one end of the balance pressure reducing valve 101 is connected with the lifting port 12, the other end of the balance pressure reducing valve 101 is connected with the winch motor 31, and the balance one-way valve 102 and the balance pressure reducing valve 101 are arranged in parallel, so that the balance valve group 10 is arranged, when the winch 2 is lifted, hydraulic oil flowing to the winch motor 31 from an oil tank 11 is stable, and the flow speed fluctuation is not too large.
As shown in fig. 2 and 6, the spool 21 includes a spool lever 211 and spool shields 212 provided at both ends of the spool lever 211, and a spool shaft 22 is provided on the spool shields 212; a rope pressing plate 213 is arranged on a drum baffle 212 at one end of the drum rod 211, the rope pressing plate 213 is fixed on the drum baffle 212 through a rope pressing bolt 214, the head of the cable 20 is fixed on the drum baffle 212 through the rope pressing plate 213, the middle of the cable 20 is wound and connected on the drum rod 211, and a lifting hook (not shown in the figure) is connected at the tail of the cable 20. The head of the cable 20 is thereby held by the rope pressing plate 213 so that the cable 20 is not easily detached from the drum 21 even when it is lowered to a limit length.
As shown in fig. 2, the winch motor 31 is connected to the reduction gearbox 25, and when the winch 2 works, the winch motor 31 drives the reduction gearbox 25 to rotate, so as to drive the drum 21 connected to the reduction gearbox 25 to rotate, thereby lifting or lowering the cable 20.
Claims (3)
1. The utility model provides a hydraulic system of double insurance winch, includes brake hydraulic system, its characterized in that: the brake hydraulic system comprises an oil tank, an output oil circuit, a brake oil circuit and an emergency oil circuit; a brake oil way is arranged between the oil tank and the output oil way, and the brake oil way comprises a first brake valve group and a second brake valve group;
a lifting port, a descending port, an oil drain port and an emergency port are arranged on the oil tank;
the output oil circuit comprises a winch motor and a brake valve, the winch motor is connected with the oil tank, the brake valve is arranged on the winch motor, the brake oil circuit drives the brake valve to be arranged, and the brake valve comprises a first brake valve and a second brake valve;
the first brake valve group comprises a first brake shuttle valve and a first brake pressure reducing valve, one end of the first brake shuttle valve is connected with a lifting port, the other end of the first brake shuttle valve is connected with a descending port, the third end of the first brake shuttle valve is connected with the first brake valve, and the first brake pressure reducing valve is arranged between the third end of the first brake shuttle valve and the first brake valve;
the second brake valve group comprises a second brake shuttle valve, a second brake pressure reducing valve and a brake regulating valve group, one end of the second brake shuttle valve is connected with a lifting port, the other end of the second brake shuttle valve is connected with a descending port, the third end of the second brake shuttle valve is connected with the brake regulating valve group, the brake regulating valve group is also connected with the second brake valve, and a second brake pressure reducing valve is arranged between the third end of the second brake shuttle valve and the brake regulating valve group;
an emergency oil way is further arranged between the oil tank and the output oil way, the emergency oil way comprises a first emergency ball valve, a second emergency ball valve, a third emergency ball valve and an emergency oil pump, one end of the emergency oil pump is connected with an emergency port, the other end of the emergency oil pump is connected with a second brake valve, the first emergency ball valve is arranged between the second brake valve and the other end of the emergency oil pump, the second emergency ball valve is arranged between the second brake valve and the brake regulating valve group, the other end of the emergency oil pump is connected with the other end of the first brake shuttle valve through the third emergency ball valve, the first emergency ball valve and the third emergency ball valve are normally closed, and the second emergency ball valve is normally open;
the brake adjusting valve group comprises a brake adjusting reversing valve, a brake adjusting shuttle valve and a brake adjusting one-way valve, the second brake reducing valve is connected with the P end of the brake adjusting reversing valve, the A end of the brake adjusting reversing valve is connected with one end of the brake adjusting shuttle valve, the T end of the brake adjusting reversing valve is connected with an oil drain port, the B end of the brake adjusting reversing valve is connected with one end of the brake adjusting one-way valve, the other end of the brake adjusting one-way valve is connected with the other end of the brake adjusting shuttle valve, and the third end of the brake adjusting shuttle valve is connected with the second brake valve; and a second emergency ball valve is arranged between the third end of the brake adjusting shuttle valve and the second brake valve.
2. The hydraulic system of a double-insurance winch according to claim 1, characterized in that: the lifting port is connected with one end of the winch motor through a lifting oil pump, the descending port is connected with the other end of the winch motor through a descending oil pump, and the oil drain end of the winch motor is connected with the oil drain port.
3. The hydraulic system of a double-insurance winch according to claim 2, characterized in that: and a balance valve bank is arranged between the lifting port and the winch motor, the balance valve bank comprises a balance pressure reducing valve and a balance one-way valve, one end of the balance pressure reducing valve is connected with the lifting port, the other end of the balance pressure reducing valve is connected with the winch motor, and the balance one-way valve and the balance pressure reducing valve are arranged in parallel.
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| CN202111466733.0A CN114014191B (en) | 2021-12-03 | 2021-12-03 | Hydraulic system of double-insurance winch |
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| CN202111466733.0A CN114014191B (en) | 2021-12-03 | 2021-12-03 | Hydraulic system of double-insurance winch |
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