CN107524661B - A kind of hydraulic system of rack-and-pinion lifting device - Google Patents
A kind of hydraulic system of rack-and-pinion lifting device Download PDFInfo
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- CN107524661B CN107524661B CN201710739254.9A CN201710739254A CN107524661B CN 107524661 B CN107524661 B CN 107524661B CN 201710739254 A CN201710739254 A CN 201710739254A CN 107524661 B CN107524661 B CN 107524661B
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- hydraulic system
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/08—Servomotor systems incorporating electrically operated control means
- F15B21/087—Control strategy, e.g. with block diagram
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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
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
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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
- 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
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
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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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/042—Controlling the temperature of the fluid
Abstract
The invention discloses a kind of hydraulic systems of rack-and-pinion lifting device, belong to hydraulic system field.The hydraulic system includes: slippage pump, enclosed main pump, first electromagnetic switch valve, second electromagnetic switch valve, fuel tank and even number execution unit, each execution unit includes: hydraulic motor, first balanced valve, second balanced valve, first check valve, second one-way valve and the first hot oil shuttle valve, the oil outlet of first balanced valve is connected to the first actuator port of the hydraulic motor, second actuator port of the hydraulic motor is connected to the oil outlet of second balanced valve, the oil inlet of first check valve is connected to the oil outlet of first balanced valve, the oil outlet of first check valve is connected to the oil inlet of first balanced valve, the oil inlet of the second one-way valve is connected to the oil outlet of second balanced valve.The hydraulic system is influenced by ambient temperature small, to improve the reliability and stability of hydraulic system.
Description
Technical field
The present invention relates to hydraulic system field, in particular to a kind of hydraulic system of rack-and-pinion lifting device.
Background technique
Self-elevating ocean platform works suitable for neritic province domain, can be used for the exploitation of offshore oil.Self-elevating ocean platform
It is used generally as auxiliary accommodation platform, it can be with the different continuous change operation places of oil recovery point, this kind of auxiliary accommodation platform
The lifting frequency is higher, and pinion and-rack jacking system is because of its lift capability with continuous and stable, and lifting speed is fast, operation side
Just the advantages that and be widely used in self-elevating ocean platform.
A kind of open type hydraulic system of existing rack-and-pinion lifting device, which includes: single-acting hydraulic
The oil outlet of pump, three position four-way directional control valve, motor and fuel tank, single-acting hydraulic pump is connected to the P of three position four-way directional control valve mouth, and three
The A mouth of position and four-way reversing valve is connected to the first actuator port of motor, the second actuator port and three position four-way directional control valve of motor
B mouth connection, T mouthfuls of oil return of three position four-way directional control valve are connected to fuel tank, in order to ensure the open type liquid of rack-and-pinion lifting device
The perfect performance of pressure system, can also include multiple function valve groups (such as overflow valve) in the open type hydraulic system, and these function
The drain tap of energy valve group is required to be connected to fuel tank.
In the implementation of the present invention, the inventor finds that the existing technology has at least the following problems:
In the open type hydraulic system, fuel tank needs to receive draining and oil return in the system, this makes the volume of the fuel tank
Also larger, also increasing so as to cause open type hydraulic system occupied space, this is unfavorable for the open type of rack-and-pinion lifting device
Hydraulic system is mounted on the limited self-elevating ocean platform in space.
Summary of the invention
In order to solve the problems, such as that open type hydraulic system occupied space is big in the prior art, the embodiment of the invention provides one kind
The hydraulic system of rack-and-pinion lifting device.The technical solution is as follows:
The embodiment of the invention provides a kind of hydraulic system of rack-and-pinion lifting device, the hydraulic system includes: to mend
Oil pump, enclosed main pump, the first electromagnetic switch valve, the second electromagnetic switch valve, fuel tank and even number execution unit.
Each execution unit includes: hydraulic motor, the first balanced valve, the second balanced valve, the first check valve, second
Check valve and the first hot oil shuttle valve, the oil outlet of first balanced valve are connected to the first actuator port of the hydraulic motor,
Second actuator port of the hydraulic motor is connected to the oil outlet of second balanced valve.
The oil inlet of first check valve is connected to the oil outlet of first balanced valve, and first check valve goes out
Hydraulic fluid port is connected to the oil inlet of first balanced valve, and the oil inlet of the second one-way valve is fuel-displaced with second balanced valve
Mouth connection, the oil outlet of the second one-way valve are connected to the oil inlet of second balanced valve.
The A mouth of the enclosed main pump is connected to the A mouth of first electromagnetic switch valve, the B of first electromagnetic switch valve
It mouthful is connected to respectively with the oil inlet of each first check valve, the oil inlet of each second one-way valve is respectively with described the
The B mouth of two electromagnetic switch valves is connected to, and the A mouth of second electromagnetic switch valve is connected to the B mouth of the enclosed main pump.
First X1 mouthfuls of oil of control of the A mouth of the first hot oil shuttle valve and the first hot oil shuttle valve is respectively with described first
The B mouth of electromagnetic switch valve is connected to, X2 mouthfuls of oil points of the second control of the B mouth and the first hot oil shuttle valve of the first hot oil shuttle valve
It is not connected to the B mouth of second electromagnetic switch valve, the draining import of the T mouth and the hydraulic motor of the first hot oil shuttle valve
The draining outlet of connection, the hydraulic motor is connected to the fuel tank.
The oil outlet of the slippage pump respectively with the B mouth of first electromagnetic switch valve and second electromagnetic switch valve
B mouthfuls of connections, the oil inlet of the slippage pump are connected to the fuel tank.
Specifically, the hydraulic system further include: third electromagnetic switch valve, each execution unit are equal further include: two
Position and four-way reversing valve, shuttle valve and variable cylinder, the hydraulic motor be variable displacement motor, the oil inlet of the third electromagnetic switch valve with
The oil outlet of the slippage pump is connected to, the oil outlet of the third electromagnetic switch valve respectively with each two position and four-way reversing valve
Control port connection, the first oil inlet of the shuttle valve is connected to the first actuator port of the hydraulic motor, the shuttle valve
The second oil inlet be connected to the second actuator port of the hydraulic motor, the oil outlet of the shuttle valve is changed with two four-ways
It is connected to the P mouth of valve, the A mouth of two position and four-way reversing valve is connected to the rod chamber of the variable cylinder, and two four-ways change
It is connected to the B mouth of valve with the rodless cavity of the variable cylinder, the variable of the T mouth and the hydraulic motor of two position and four-way reversing valve
The connection of commutation control hydraulic fluid port, the piston rod of the variable cylinder are connect with the variant structural of the hydraulic motor.
Specifically, the hydraulic system further include: the 4th electromagnetic switch valve, on the output shaft of each hydraulic motor
Brake is installed, the oil inlet of the 4th electromagnetic switch valve is connected to the oil outlet of the slippage pump, the 4th electromagnetism
The oil outlet of switch valve is connected to the oil inlet of each brake.
Specifically, the hydraulic system further include: the second hot oil shuttle valve, the A mouth of the second hot oil shuttle valve and described the
First X1 mouthfuls of oil of control of two hot oil shuttle valves is connected to the B mouth of first electromagnetic switch valve respectively, the second hot oil shuttle valve
B mouth and the second hot oil shuttle valve second control X2 mouthfuls of oil be connected to respectively with the B mouth of second electromagnetic switch valve, it is described
The T mouth of second hot oil shuttle valve is connected to the fuel tank.
Further, the hydraulic system further include: first throttle valve, the oil inlet of the first throttle valve and described the
The T mouth of two hot oil shuttle valves is connected to, and the oil outlet of the first throttle valve is connected to the fuel tank.
Further, the hydraulic system further include: the first cooler, the oil inlet of first cooler and described the
The T mouth of two hot oil shuttle valves is connected to, and the oil outlet of first cooler is connected to the fuel tank.
Specifically, the hydraulic system further include: second throttle, the oil inlet of the second throttle and described first
The T mouth of hot oil shuttle valve is connected to, the draining inlet communication of the oil outlet of the second throttle and the hydraulic motor.
Specifically, the hydraulic system further include: the second cooler, the oil inlet of second cooler respectively with it is each
The oil outlet of the draining outlet of the hydraulic motor, second cooler is connected to the fuel tank.
Specifically, the hydraulic system further include: overflow valve and third check valve, the oil inlet of the third check valve with
The oil outlet of the slippage pump is connected to, the oil outlet of the third check valve respectively with the B mouth of first electromagnetic switch valve, institute
The B mouth for stating the second electromagnetic switch valve is connected to the oil inlet of the overflow valve, and the oil outlet of the overflow valve and the fuel tank connect
It is logical.
Further, the hydraulic system further include: the 4th check valve and the 5th check valve, the 4th check valve into
The oil inlet of hydraulic fluid port and the 5th check valve is connected to the oil outlet of the third check valve respectively, the 4th check valve
Oil outlet is connected to the B mouth of first electromagnetic switch valve, the oil outlet of the 5th check valve and second electromagnetic switch
The B mouth of valve is connected to.
Technical solution provided in an embodiment of the present invention has the benefit that the embodiment of the invention provides a kind of gears
The hydraulic system of gear rack elevating device, enclosed main pump, slippage pump, the first hot oil shuttle valve, the first electromagnetic switch valve, the second electromagnetism are opened
Closed oil circuit system will be realized by closing valve and even number execution unit, since in closed oil circuit system, the fuel tank of hydraulic system is only
It is only used for the draining of the oil suction of system slippage pump and system, required oil liquid is less, and the pipeline and fuel tank volume of system are very small, significantly
Space is saved, so that the space layout of hydraulic system entirety is smaller, to be conducive to the open type liquid of rack-and-pinion lifting device
Pressure system is mounted on the limited self-elevating ocean platform in space.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is the hydraulic scheme of rack-and-pinion lifting device provided in an embodiment of the present invention；
Fig. 2 is the Hydraulic System Principle that rack-and-pinion lifting device provided in an embodiment of the present invention includes two execution units
Figure.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is described in further detail.
Embodiment
The embodiment of the invention provides a kind of hydraulic systems of rack-and-pinion lifting device, as shown in Figure 1, the hydraulic system
It include: slippage pump 1, enclosed main pump 4, the first electromagnetic switch valve 5,6 fuel tank c of the second electromagnetic switch valve and even number execution unit 7.
In the present embodiment, it is introduced by taking an execution unit 7 as an example.
Each execution unit 7 include: hydraulic motor 8, the first balanced valve 9, the second balanced valve 10, the first check valve 11,
Second one-way valve 12 and the first hot oil shuttle valve 13, the oil outlet of the first balanced valve 9 and the first actuator port of hydraulic motor 8 connect
Logical, the second actuator port of hydraulic motor 8 is connected to the oil outlet of the second balanced valve 10, the oil inlet of the first check valve 11 and the
The oil outlet of one balanced valve 9 is connected to, and the oil outlet of the first check valve 11 is connected to the oil inlet of the first balanced valve 9, and second is unidirectional
The oil outlet of valve 12 is connected to the oil inlet of the second balanced valve 10, and the oil inlet of second one-way valve 12 and the second balanced valve 10 go out
Hydraulic fluid port connection.
The A mouth of enclosed main pump 4 is connected to the A mouth of the first electromagnetic switch valve 5, and the B mouth of the first electromagnetic switch valve 5 is respectively and often
The oil inlet of a first check valve 11 is connected to, the oil inlet of each second one-way valve 12 respectively with the B mouth of the second electromagnetic switch valve 6
Connection, the A mouth of the second electromagnetic switch valve 6 are connected to the B of enclosed main pump 4 mouth.
First X1 mouthfuls of oil of control of the A mouth of the first hot oil shuttle valve 13 and the first hot oil shuttle valve 13 respectively with the first electromagnetic switch
The B mouth of valve 5 is connected to, and the B mouth of the first hot oil shuttle valve 13 and the second X2 mouthfuls of oil of control of the first hot oil shuttle valve 13 are electric with second respectively
The B mouth of magnetic switch valve 6 is connected to, and the draining inlet communication of the T mouth and hydraulic motor 8 of the first hot oil shuttle valve 13, hydraulic motor 8 is let out
Oil export is connected to fuel tank a.
The oil outlet of slippage pump 1 is connected to the B mouth of the B mouth of the first electromagnetic switch valve 5 and the second electromagnetic switch valve 6 respectively,
The oil inlet of slippage pump 1 is connected to fuel tank a.In the present embodiment, enclosed main pump 4 is driven by motor 29.Liquid in the present embodiment
Pressure motor 8 is the driving device for driving the rotation of rack-and-pinion lifting device middle gear.
Specifically, which can also include: third electromagnetic switch valve 14, and each execution unit 7 can also wrap
Include: two position and four-way reversing valves 15, shuttle valve 16 and variable cylinder 17, hydraulic motor 8 be variable displacement motor, third electromagnetic switch valve 14 into
Hydraulic fluid port is connected to the oil outlet of slippage pump 1, the oil outlet of third electromagnetic switch valve 14 respectively with each two position and four-way reversing valve 15
Control port connection, the first oil inlet of shuttle valve 16 is connected to the first actuator port of hydraulic motor 8, shuttle valve 16 second into
Hydraulic fluid port is connected to the second actuator port of hydraulic motor 8, and the oil outlet of shuttle valve 16 is connected to the P mouth of two position and four-way reversing valves 15,
The A mouth of two position and four-way reversing valves 15 is connected to the rod chamber of variable cylinder 17, B mouth and the variable cylinder 17 of two position and four-way reversing valves 15
Rodless cavity connection, the T mouth of two position and four-way reversing valves 15 are connected to the variable commutation control hydraulic fluid port of hydraulic motor 8, variable cylinder 17
Piston rod is connect with the variant structural of hydraulic motor 8.In the present embodiment, variable displacement motor can be inclined disc type variable displacement motor, variable
The piston rod of cylinder 17 is connect with the swash plate of hydraulic motor 8.In other embodiments, variable displacement motor can also be clino-axis type variable horse
It reaches or radial plunger type variable displacement motor.When self-elevating ocean platform carries out lowering action, third electromagnetic switch valve 14 must be electric, by
The high-voltage oil liquid that slippage pump 1 exports flows into the control port of two position and four-way reversing valves 15 by third electromagnetic switch valve 14, thus
Two position and four-way reversing valves 15 are made to commutate, high-voltage oil liquid flows into two position and four-way reversing valves 15 by shuttle valve 16, then passes through variable cylinder 17
It flow to the variable commutation control hydraulic fluid port of hydraulic motor 8, the piston upwards of variable cylinder 17 to range, then hydraulic motor 8
In minimum injection rate, the flow of hydraulic system output is constant, so that hydraulic motor 8 is in high speed rotation state, variable cylinder 17
Piston moves downward to range, then hydraulic motor 8 is in maximum pump discharge, can accurately control hydraulic horse by variable cylinder 17
Up to 8 discharge capacity.When self-elevating ocean platform is in spud leg lifting operating condition, needs hydraulic motor 8 that there is biggish discharge capacity, pass through
Variable displacement motor is then not necessarily to increase the discharge capacity of hydraulic motor 8, it is only necessary to can be increased the lifting of entire hydraulic system by variable displacement motor
Speed.
Specifically, which can also include: the 4th electromagnetic switch valve 19, on the output shaft of each hydraulic motor 8
It is mounted on brake 18, the oil inlet of the 4th electromagnetic switch valve 19 is connected to the oil outlet of slippage pump 1, the 4th electromagnetic switch valve
19 oil outlet is connected to the oil inlet of each brake 18.Brake 18 for realizing hydraulic motor 8 braking.Work as jack up
When ocean platform is acted, the 4th electromagnetic switch valve 19 must be electric, and brake 18 makes hydraulic motor 8 stop operating.
Specifically, which can also include: the second hot oil shuttle valve 20, the A mouth and second of the second hot oil shuttle valve 20
First X1 mouthfuls of oil of control of hot oil shuttle valve 20 is connected to the B mouth of the first electromagnetic switch valve 5 respectively, the B mouth of the second hot oil shuttle valve 20
It is connected to respectively with the B mouth of the second electromagnetic switch valve 20 with the second X2 mouthfuls of oil of control of the second hot oil shuttle valve 20, the second hot oil shuttle valve
20 T mouth is connected to fuel tank.The second hot oil shuttle valve 20 is used for the A of the first actuator port of hydraulic motor 8 and enclosed main pump 4
Oil liquid between mouthful or between the second actuator port of hydraulic motor 8 and the B mouth of enclosed main pump 4 is drawn, and flow to fuel tank a, is made
Oil liquid is cooled down, to avoid the first actuator port of hydraulic motor 8 and the A mouth of enclosed main pump 4 when drawing by pipeline
Between or hydraulic motor 8 the second actuator port and enclosed main pump 4 B mouth between oil liquid temperature it is excessively high, and influence hydraulic pressure system
The working performance of system.
Further, which can also include: first throttle valve 21, the oil inlet of first throttle valve 21 and second
The T mouth of hot oil shuttle valve 20 is connected to, and the oil outlet of first throttle valve 21 is connected to fuel tank a.The first throttle valve 21 is for controlling warp
The flow velocity for the oil liquid that second hot oil shuttle valve 20 is drawn.Further, which can be throttling one-way valve, the throttling
Check valve can be avoided the reflux of the oil liquid by first throttle valve 21.
Further, which can also include: the first cooler 22, the oil inlet and second of the first cooler 22
The T mouth of hot oil shuttle valve 20 is connected to, and the oil outlet of the first cooler 22 is connected to fuel tank a.First cooler 22 can be further
Reduce the temperature for the oil liquid drawn through the second hot oil shuttle valve 20.
Specifically, which can also include: second throttle 23, the oil inlet of second throttle 23 and the first heat
The T mouth of oily shuttle valve 13 is connected to, the oil outlet of second throttle 23 and the draining inlet communication of hydraulic motor 8.The second throttle
23 for controlling the flow velocity for the oil liquid drawn through the first hot oil shuttle valve 13.Further, which can be throttling
Check valve, the throttling one-way valve can be avoided the reflux of the oil liquid by second throttle 23.
Specifically, which can also include: the second cooler 24, and the oil inlet of the second cooler 24 is respectively and often
The oil outlet of the draining outlet of a hydraulic motor 8, the second cooler 24 is connected to fuel tank a.Second cooler 24 is for cold
But by the oil liquid of the draining outlet outflow of each hydraulic motor 8.
Specifically, which can also include: overflow valve 3 and third check valve 25, the oil inlet of third check valve 25
Mouthful be connected to the oil outlet of slippage pump 1, the oil outlet of third check valve 25 respectively with the B mouth of the first electromagnetic switch valve 5, second electric
The B mouth of magnetic switch valve 6 is connected to the oil inlet of overflow valve 3, and the oil outlet of overflow valve 3 is connected to fuel tank a.Slippage pump 1 makes hydraulic
Between first actuator port of motor 8 and the A mouth of enclosed main pump 4, the B of the second actuator port of hydraulic motor 8 and enclosed main pump 4
Full of after oil liquid in pipeline between mouthful, overflow valve 3 is opened, and extra oil liquid can return to fuel tank a by overflow valve 3.
Further, which can also include: the 4th check valve 26 and the 5th check valve 27, the 4th check valve 26
Oil inlet and the oil inlet of the 5th check valve 27 be connected to respectively with the oil outlet of third check valve 25, the 4th check valve 26 goes out
Hydraulic fluid port is connected to the B mouth of the first electromagnetic switch valve 5, the B mouth company of the oil outlet of the 5th check valve 27 and the second electromagnetic switch valve 6
It is logical.
Specifically, which may include: built-in slippage pump 28, and the oil inlet and fuel tank a of built-in slippage pump 28 connect
Logical, the oil outlet of built-in slippage pump 28 is connected to the repairing mouth of enclosed main pump 4.
The hydraulic system is in actual work, since driving device is arranged in pairs, so execution unit 7 corresponds to even number
A arrangement, hydraulic schematic diagram are shown in Fig. 2.
It following is a brief introduction of the working principle of hydraulic system provided in an embodiment of the present invention, specific as follows:
Before self-elevating ocean platform lifting action, by the first actuator port from slippage pump 1 to hydraulic motor 8 and enclosed
Makeup oil on closed line system between the A mouth of main pump 4, between the second actuator port of hydraulic motor 8 and the B mouth of enclosed main pump 4
Liquid.
When self-elevating ocean platform carries out lowering action, the first electromagnetic switch valve 5 and the second electromagnetic switch valve 6 are obtained
The oil liquid of electricity, the A mouth outflow of enclosed main pump 4 successively passes through the first electromagnetic switch valve 5 and the first check valve 11 flow to hydraulic motor 8
The first actuator port, drive hydraulic motor 8 to rotate, the hydraulic motor 8 of rotation drives gear (not shown) to match along with it
The rack gear (not shown) of conjunction rotates, to realize self-elevating ocean platform lowering action.At this point, oil liquid is by hydraulic motor 8
By the second balanced valve 10 after the outflow of second actuator port, oil liquid flows to after the second electromagnetic switch valve 6 B for entering enclosed main pump 4
Mouthful, form closed circuit.
Self-elevating ocean platform carries out the principle of vertical motion referring to lowering action, and which is not described herein again.
The embodiment of the invention provides a kind of hydraulic system of rack-and-pinion lifting device, enclosed main pump, slippage pump, first
Hot oil shuttle valve, the first electromagnetic switch valve, the second electromagnetic switch valve and even number execution unit will realize closed oil circuit system, by
In closed oil circuit system, the fuel tank of hydraulic system is used only for the draining of the oil suction of system slippage pump and system, required oil liquid compared with
Few, the pipeline and fuel tank volume of system are very small, and space is greatly saved so that the space layout of hydraulic system entirety compared with
It is small, so that the open type hydraulic system for being conducive to rack-and-pinion lifting device is mounted on the limited self-elevating ocean platform in space.This
Outside, in the hydraulic system, the oil liquid between enclosed main pump and execution unit is influenced by ambient temperature small, to improve hydraulic pressure system
The reliability and stability of system.Meanwhile the element purchase cost of the hydraulic system is lower, reduces being processed into for the hydraulic system
This.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of hydraulic system of rack-and-pinion lifting device, which is characterized in that the hydraulic system includes: slippage pump, enclosed
Main pump, the first electromagnetic switch valve, the second electromagnetic switch valve, fuel tank and even number execution unit,
Each execution unit includes: hydraulic motor, the first balanced valve, the second balanced valve, the first check valve, second unidirectional
Valve and the first hot oil shuttle valve, the oil outlet of first balanced valve is connected to the first actuator port of the hydraulic motor, described
Second actuator port of hydraulic motor is connected to the oil outlet of second balanced valve,
The oil inlet of first check valve is connected to the oil outlet of first balanced valve, the oil outlet of first check valve
It is connected to the oil inlet of first balanced valve, the oil outlet of the oil inlet of the second one-way valve and second balanced valve connects
Logical, the oil outlet of the second one-way valve is connected to the oil inlet of second balanced valve；
The A mouth of the enclosed main pump is connected to the A mouth of first electromagnetic switch valve, the B mouth point of first electromagnetic switch valve
It is not connected to the oil inlet of each first check valve, the oil inlet of each second one-way valve is electric with described second respectively
The B mouth of magnetic switch valve is connected to, and the A mouth of second electromagnetic switch valve is connected to the B mouth of the enclosed main pump；
First X1 mouthfuls of oil of control of the A mouth of the first hot oil shuttle valve and the first hot oil shuttle valve respectively with first electromagnetism
The B mouth of switch valve is connected to, B mouth of the first hot oil shuttle valve and the second of the first hot oil shuttle valve control X2 mouthfuls of oil respectively with
The B mouth of second electromagnetic switch valve is connected to, and the T mouth of the first hot oil shuttle valve connects with the draining import of the hydraulic motor
Logical, the draining outlet of the hydraulic motor is connected to the fuel tank；
The oil outlet of the slippage pump B mouth with the B mouth of first electromagnetic switch valve and second electromagnetic switch valve respectively
Connection, the oil inlet of the slippage pump are connected to the fuel tank；
The hydraulic system further include: third electromagnetic switch valve, each execution unit are equal further include: two four-way commutations
Valve, shuttle valve and variable cylinder, the hydraulic motor are variable displacement motor, the oil inlet and the slippage pump of the third electromagnetic switch valve
Oil outlet connection, the control port with each two position and four-way reversing valve respectively of the oil outlet of the third electromagnetic switch valve
Connection, the first oil inlet of the shuttle valve are connected to the first actuator port of the hydraulic motor, the second oil inlet of the shuttle valve
Mouth is connected to the second actuator port of the hydraulic motor, the P mouth of the oil outlet of the shuttle valve and two position and four-way reversing valve
Connection, the A mouth of two position and four-way reversing valve are connected to the rod chamber of the variable cylinder, the B mouth of two position and four-way reversing valve
It is connected to the rodless cavity of the variable cylinder, the variable commutation control of the T mouth and the hydraulic motor of two position and four-way reversing valve
Hydraulic fluid port connection, the piston rod of the variable cylinder are connect with the variant structural of the hydraulic motor.
2. hydraulic system according to claim 1, which is characterized in that the hydraulic system further include: the 4th electromagnetic switch
Valve, is mounted on brake on the output shaft of each hydraulic motor, the oil inlet of the 4th electromagnetic switch valve with it is described
The oil outlet of slippage pump is connected to, and the oil outlet of the 4th electromagnetic switch valve is connected to the oil inlet of each brake.
3. hydraulic system according to claim 1, which is characterized in that the hydraulic system further include: the second hot oil shuttle valve,
First X1 mouthfuls of oil of control of the A mouth of the second hot oil shuttle valve and the second hot oil shuttle valve respectively with first electromagnetic switch
The B mouth of valve is connected to, B mouth of the second hot oil shuttle valve and the second of the second hot oil shuttle valve control X2 mouthfuls of oil respectively with it is described
The B mouth of second electromagnetic switch valve is connected to, and the T mouth of the second hot oil shuttle valve is connected to the fuel tank.
4. hydraulic system according to claim 3, which is characterized in that the hydraulic system further include: first throttle valve, institute
The oil inlet for stating first throttle valve is connected to the T mouth of the second hot oil shuttle valve, the oil outlet of the first throttle valve with it is described
Fuel tank connection.
5. hydraulic system according to claim 3, which is characterized in that the hydraulic system further include: the first cooler, institute
The oil inlet for stating the first cooler is connected to the T mouth of the second hot oil shuttle valve, the oil outlet of first cooler with it is described
Fuel tank connection.
6. hydraulic system according to claim 1, which is characterized in that the hydraulic system further include: second throttle, institute
The oil inlet for stating second throttle is connected to the T mouth of the first hot oil shuttle valve, the oil outlet of the second throttle with it is described
The draining inlet communication of hydraulic motor.
7. hydraulic system according to claim 1, which is characterized in that the hydraulic system further include: the second cooler, institute
State the oil inlet of the second cooler draining outlet with each hydraulic motor respectively, second cooler it is fuel-displaced
Mouth is connected to the fuel tank.
8. hydraulic system according to claim 1, which is characterized in that the hydraulic system further include: overflow valve and third
The oil inlet of check valve, the third check valve is connected to the oil outlet of the slippage pump, the oil outlet of the third check valve
Connect respectively with the oil inlet of the B mouth of first electromagnetic switch valve, the B mouth of second electromagnetic switch valve and the overflow valve
Logical, the oil outlet of the overflow valve is connected to the fuel tank.
9. hydraulic system according to claim 8, which is characterized in that the hydraulic system further include: the 4th check valve and
The oil inlet of 5th check valve, the oil inlet of the 4th check valve and the 5th check valve respectively with the third check valve
Oil outlet connection, the oil outlet of the 4th check valve is connected to the B mouth of first electromagnetic switch valve, and the described 5th unidirectionally
The oil outlet of valve is connected to the B mouth of second electromagnetic switch valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710739254.9A CN107524661B (en) | 2017-08-25 | 2017-08-25 | A kind of hydraulic system of rack-and-pinion lifting device |
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| CN201710739254.9A CN107524661B (en) | 2017-08-25 | 2017-08-25 | A kind of hydraulic system of rack-and-pinion lifting device |
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| CN107524661A CN107524661A (en) | 2017-12-29 |
| CN107524661B true CN107524661B (en) | 2019-07-23 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110255328B (en) * | 2019-05-20 | 2020-10-16 | 泸州天府液压件有限公司 | External hydraulic lifting fire-fighting system for high-rise building |
| CN111664135A (en) * | 2020-04-23 | 2020-09-15 | 武汉船用机械有限责任公司 | Hydraulic system of gear rack lifting platform |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002130474A (en) * | 2000-10-18 | 2002-05-09 | Hitachi Constr Mach Co Ltd | Hydraulic closed circuit |
| DE102008042956A1 (en) * | 2008-10-20 | 2010-04-22 | Zf Friedrichshafen Ag | Arrangement for hydraulic eccentric adjustment for setting a predetermined displacement in a hydrostatic motor |
| CN202379608U (en) * | 2011-12-29 | 2012-08-15 | 徐州重型机械有限公司 | Boarding rotating hydraulic control system and crane provided with same |
| CN102979070B (en) * | 2012-11-23 | 2014-08-13 | 武汉船用机械有限责任公司 | Motor system for lifting ocean platform and load unbalance monitoring and controlling method of motor system |
| CN102992194B (en) * | 2012-11-30 | 2015-01-14 | 三一重工股份有限公司 | Crane, hydraulic assembly of crane, and method for controlling crane |
| CN202988618U (en) * | 2012-12-11 | 2013-06-12 | 中联重科股份有限公司 | Closed hydraulic circuit for controlling cantilever crane to rotate, and crane |
| JP6108531B2 (en) * | 2013-03-14 | 2017-04-05 | Ｋｙｂ株式会社 | Vehicle height elevating device |
| CN103206431B (en) * | 2013-04-18 | 2016-03-02 | 中联重科股份有限公司渭南分公司 | Closed rotary system and comprise the engineering machinery of this closed rotary system |
| CN203702699U (en) * | 2013-12-23 | 2014-07-09 | 南京中航特种装备有限公司上海技术中心 | Hydraulic control system for vehicle-mounted single-pump double-motor speed-regulating executing mechanism |
| CN104163385B (en) * | 2014-07-24 | 2016-09-21 | 武汉船用机械有限责任公司 | A kind of winch hydraulic control system |
| CN105951703B (en) * | 2016-05-03 | 2017-12-01 | 武汉船用机械有限责任公司 | A kind of hydraulic system of gear-rack type lifter structure |
| CN105927601B (en) * | 2016-05-19 | 2018-01-26 | 武汉船用机械有限责任公司 | One kind lifting hydraulic system |
| CN106379827B (en) * | 2016-11-01 | 2018-07-03 | 中国水产科学研究院渔业机械仪器研究所 | A kind of hydraulic winch rope length controls hydraulic pressure tension system |
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