CN107917112A - Sand making machine - Google Patents
Sand making machine Download PDFInfo
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- CN107917112A CN107917112A CN201711372726.8A CN201711372726A CN107917112A CN 107917112 A CN107917112 A CN 107917112A CN 201711372726 A CN201711372726 A CN 201711372726A CN 107917112 A CN107917112 A CN 107917112A
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- Prior art keywords
- oil
- pressure
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- valve
- control valve
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
- F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
- F15B11/042—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed by means in the feed line, i.e. "meter in"
- F15B11/0423—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed by means in the feed line, i.e. "meter in" by controlling pump output or bypass, other than to maintain constant speed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
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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
- 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
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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
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
- F15B20/004—Fluid pressure supply failure
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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
- 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
Abstract
The present invention relates to a kind of sand making machine, drive system including host and driving host operating, it is characterized in that, drive system includes engine (2), hydraulic pump (4) and hydraulic motor (15), engine (2) is drivingly connected with hydraulic pump (4), hydraulic pump (4) is connected with hydraulic motor (15) by fluid pressure line, and hydraulic motor (15) is connected with host to drive host to rotate.The present invention makes the drive system for being used to drive host to operate of sand making machine not depend on commercial power as power source, complete machine using engine, the occasion of commercial power is lacked in field etc. can also work normally by setting engine, hydraulic pump and hydraulic motor；And hydraulic pump and fluid motor-driven are used, can realize frequent starting, reduces waiting time of machine halt；Compact integral structure at the same time, weight and volume is also smaller, meets that space limits demand；Motor driving is not used to save transformer, it is cost-effective.
Description
Technical field
The present invention relates to Crushing ＆ Screening Machineries technical field, more particularly to a kind of sand making machine.
Background technology
In recent years, natural sand stone resource is petered out, and country has forbidden the exploitation of river sand, and then Machine-made Sand is just replacing natural
Sand has been more and more widely used.Sand making machine is the important equipment of production mechanism sand, it is rotated at a high speed by main shaft, by material
Throw away at a high speed, high-speed material is realized broken with counterpunch board or the collision of static material.Sand making machine both can be used for sand processed, it can also be used to
Shaping.When sand making machine is used for sand processed, the rotating speed size of main shaft can influence into sand coarse aggregate ratio；When for shaping, to the speed of mainshaft
It is required that reduce.If sand making machine meets sand and shaping requirements processed at the same time, it is desirable to which the rotating speed of main shaft should have larger adjusting model
Enclose.
Existing sand making machine is driven using motor mostly, V belt translation is used between motor shaft and sand making machine main shaft, gearratio takes
Certainly in pulley diameters ratio.Drive according to alternating current generator, one selected rotating speed of motor, that is, non-adjustable, turn if to change main shaft
Speed, then must change the gearratio of V belt translation, can only be realized at present by replacing the belt wheel of different-diameter, general single belt wheel
Weight is time-consuming and laborious in 200Kg or so, dismounting；, can be real in the case where not changing V belt translation gearratio according to variable-frequency motor
Existing speed governing, but variable-frequency motor is expensive, is not really applied and promotes at present.
At present, the existing drive system for sand making machine is primarily present following shortcoming：
1st, 380V industrial powers are needed using motor driving, is not suitable for the occasion that field work etc. lacks commercial power；
2nd, additionally mounted transformer is also needed using motor driving, purchase and installation transformer can all increase the operation of sand making machine
Cost；
3rd, motor volume is huge, can not meet the requirement that portable sand making machine limits installation space；
4th, single motor driving power is limited, it is impossible to meet the power demand of large-scale sand making machine, according to Dual-motors Driving, its
Power loss is about the 15%~20% of installation general power, and power loss is larger；
5th, alternating current generator driving can not realize stepless speed regulation；
6th, motor can not realize frequent starting, and the cooling stand-by period grown is needed very much after disorderly closedown；
7th, the rotor of large inertia is usually mounted with the boss rod of sand making machine, rotor kinetic energy is larger when running at high speed, in electricity
Rotor still keeps running at high speed when machine powers off, downtime length.
It should be noted that the information for being disclosed in background of invention part is merely intended to totality of the increase to the present invention
The understanding of background, and be not construed as recognizing or imply the information structure in any form by those skilled in the art public affairs
The prior art known.
The content of the invention
The purpose of the present invention is to propose to a kind of sand making machine, to solve dependence of the sand making machine of the prior art to commercial power
The problem of property is too strong.
To achieve the above object, the present invention provides a kind of sand making machine, including host and the drivetrain of driving host operating
System, drive system include engine, hydraulic pump and hydraulic motor, and engine is connected with hydraulic pump drive, hydraulic pump and hydraulic pressure horse
Connected up to by fluid pressure line, hydraulic motor is connected with host to drive host to rotate.
Further, hydraulic pump is variable pump, and the velocity of rotation of host is adjusted by adjusting the discharge capacity of hydraulic pump.
Further, drive system further includes proportional control valve, oil cylinder and controller, be equipped with the cylinder barrel of oil cylinder piston with
Cylinder barrel is separated to form two chambers, two actuator ports of proportional control valve are connected with two chambers of oil cylinder respectively, hydraulic pump
Swash plate is connected with piston, and the control terminal of proportional control valve is connected with controller signals, and controller is by adjusting proportional control valve
Aperture control piston moves, and the inclination angle of the mobile drive swash plate of piston changes, so as to fulfill to the stepless of hydraulic pump discharge
Adjust.
Further, the swash plate of hydraulic pump is connected with piston by head rod, and displacement is equipped with proportional control valve and is passed
Sensor, the spool of proportional control valve are connected with head rod by the second connecting rod, and displacement sensor detects the second connecting rod
Displacement variable, and testing result is sent to controller, controller is according to the testing result comparative example control of displacement sensor
Valve processed is adjusted.
Further, drive system further includes pressure sensor, and pressure sensor is used for the pressure for detecting drive system, pressure
Force snesor is connected with controller signals, the system pressure value of detection is transferred to controller, controller, which can obtain, to be started
The rotating speed and moment of torsion of machine, and be adjusted according to system pressure value, the rotating speed of engine and moment of torsion comparative example control valve.
Further, drive system further includes electric proportional pressure control valve and controller, and electric proportional pressure control valve and hydraulic motor are simultaneously
Connection connection, the control terminal of electric proportional pressure control valve are connected with controller signals, and controller can adjust the overflow of electric proportional pressure control valve
Pressure, so that electric proportional pressure control valve opens or closes.
Further, the first hydraulic fluid port of hydraulic pump and the first hydraulic fluid port of hydraulic motor pass through the first oil communication, hydraulic pump
The second hydraulic fluid port and hydraulic motor the second hydraulic fluid port by the second oil communication, to form closed cycle oil circuit, drive system is also
Including slippage pump, slippage pump is used to give closed cycle oil circuit repairing.
Further, the oil inlet of slippage pump is connected with fuel tank, the oil outlet of slippage pump and the first oil communication, and repairing
Connection oil circuit between the oil outlet of pump and the first oil circuit is equipped with the first check valve, and the oil outlet of slippage pump and the second oil circuit connect
It is logical, and the connection oil circuit between the oil outlet of slippage pump and the second oil circuit is equipped with the second check valve.
Further, drive system further includes first overflow valve in parallel with the first check valve and in parallel with the second check valve
The second overflow valve.
Further, drive system further includes motor, the storage battery for motor power supply and for adjusting hydraulic pump discharge
Proportional control valve, motor are used to drive repairing pump work, and the oil outlet of slippage pump is connected with proportional control valve, so that slippage pump is made
For the oil sources of proportional control valve.
Further, the connection oil circuit between the oil outlet and proportional control valve of slippage pump be equipped with check valve and with it is unidirectional
The restricting element that valve is connected in parallel.
Further, drive system further includes pressure limiting device, and pressure limiting device can reach pressure limiting in the pressure of drive system
Open, hydraulic oil is guided into the working oil path that can reduce the discharge capacity of hydraulic pump during the pressure limit value of device.
Further, drive system further includes the first pressure limiting valve, the second pressure limiting valve and the ratio for adjusting hydraulic pump discharge
Example control valve, the first pressure limiting valve are connected between the oil outlet of the first check valve and the first actuator port of proportional control valve, the
Two pressure limiting valves are connected between the oil outlet of the second check valve and the second actuator port of proportional control valve.
Further, the 3rd check valve is equipped between the oil inlet of the oil outlet of the first pressure limiting valve and the first check valve, the
The 4th check valve is equipped between the oil inlet of the oil outlet of two pressure limiting valves and the second check valve.
Further, drive system further includes flushing valve group, the first hydraulic fluid port of hydraulic pump and the first hydraulic fluid port of hydraulic motor
By the first oil communication, the second hydraulic fluid port of hydraulic pump and the second hydraulic fluid port of hydraulic motor pass through the second oil communication, flushing valve
Group is connected between the first oil circuit and the second oil circuit, is rinsed valve group and is used to make the low pressure oil liquid stream oil return box in drive system.
Based on above-mentioned technical proposal, the present invention makes being used for for sand making machine by setting engine, hydraulic pump and hydraulic motor
The drive system of driving host operating does not depend on commercial power using engine as power source, complete machine, lacks work in field etc.
The occasion of industry electricity consumption can also work normally；And hydraulic pump and fluid motor-driven are used, can realize frequent starting, reduction stops
The machine stand-by period；Compact integral structure at the same time, weight and volume is also smaller, meets that space limits demand；Motor is not used to drive
It is dynamic to save transformer, it is cost-effective.
Brief description of the drawings
Attached drawing described herein is used for providing a further understanding of the present invention, forms the part of the application, this hair
Bright schematic description and description is used to explain the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the control principle drawing of drive system in sand making machine one embodiment of the present invention.
In figure：
1st, fuel tank；2nd, engine；3rd, oil cylinder；4th, hydraulic pump；5th, the 3rd check valve；6th, the 4th check valve；7th, the first pressure limiting
Valve；8th, the second pressure limiting valve；9th, the first overflow valve；10th, the second overflow valve；11st, the first check valve；12nd, the second check valve；13rd, it is electric
Proportional pressure control valve；14th, valve group is rinsed；15th, hydraulic motor；16th, first filter；17th, motor；18th, slippage pump；19th, the 3rd overflows
Flow valve；20th, the second filter；21st, pressure sensor；22nd, one-way throttle valve group；23rd, proportional control valve；24th, head rod；
25th, the second connecting rod.
Embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in embodiment is clearly and completely retouched
State.Obviously, described embodiment is only the part of the embodiment of the present invention, instead of all the embodiments.Based on this hair
Bright embodiment, the every other implementation that those of ordinary skill in the art are obtained without making creative work
Example, belongs to the scope of protection of the invention.
In the description of the present invention, it is to be understood that term " " center ", " transverse direction ", " longitudinal direction ", "front", "rear",
The orientation or position relationship of the instruction such as "left", "right", " on ", " under ", " vertical ", " level ", " top ", " bottom ", " interior ", " outer " are
Based on orientation shown in the drawings or position relationship, it is for only for ease of the description present invention and simplifies description, rather than instruction or dark
Show that the device of meaning or element there must be specific orientation, with specific azimuth configuration and operation, thus it is it is not intended that right
The limitation of the scope of the present invention.
As shown in Figure 1, in one illustrative examples of sand making machine of the present invention, which includes host and driving host
The drive system of operating, drive system include engine 2, hydraulic pump 4 and hydraulic motor 15, and engine 2 connects with the driving of hydraulic pump 4
Connect, hydraulic pump 4 is connected with hydraulic motor 15 by fluid pressure line, and hydraulic motor 15 is connected with host to drive host to rotate.
In above-mentioned illustrative examples, by setting engine 2, hydraulic pump 4 and hydraulic motor 15, make the use of sand making machine
Power source is used as using engine 2 in the drive system of driving host operating, complete machine does not depend on commercial power, lacks in field etc.
The occasion of commercial power can also work normally；And driven using hydraulic pump 4 and hydraulic motor 15, can realize frequent starting,
Reduce waiting time of machine halt；Compact integral structure at the same time, weight and volume is also smaller, meets that space limits demand；Do not use
Motor driving can also save transformer, cost-effective.
Further, hydraulic pump 4 is variable pump, and the velocity of rotation of host is adjusted by adjusting the discharge capacity of hydraulic pump 4.It is logical
Cross and use variable pump, the velocity of rotation of host can be adjusted by the discharge capacity that regulated variable pumps, without replace belt wheel or
Using variable-frequency motor, adjusting efficiency can be improved, it is cost-effective.
Further, drive system further includes proportional control valve 23, oil cylinder 3 and controller, is equipped with and lives in the cylinder barrel of oil cylinder 3
Plug by cylinder barrel to be separated to form two chambers, and two actuator ports of proportional control valve 23 are connected with two chambers of oil cylinder 3 respectively, liquid
The swash plate of press pump 4 is connected with piston, and the control terminal of proportional control valve 23 is connected with controller signals, and controller is by adjusting ratio
The aperture control piston movement of control valve 23, the inclination angle of the mobile drive swash plate of piston changes, so as to fulfill to hydraulic pump 4
The step-less adjustment of discharge capacity.
By Set scale control valve 23, oil cylinder 3 and controller, it can be adjusted by controller and be input to proportional control valve
23 size of current, so as to control the aperture of proportional control valve 23, entering by the hydraulic oil of proportional control valve 23 can in oil cylinder 3
To promote piston to move, after piston movement the swash plate of hydraulic pump 4 can be driven to deflect, so as to change the discharge capacity of hydraulic pump 4.
The aperture size of proportional control valve 23 can realize step-less adjustment, thus the discharge capacity of hydraulic pump 4 also can correspondingly realize it is stepless
Adjust, so as to improve the controllability of discharge capacity adjusting, and then the velocity of rotation of host is realized step-less adjustment, meet host
Demand.
As shown in Figure 1, the section of the piston set in oil cylinder 3 is in H-type, piston separates the cylinder barrel inner space of oil cylinder 3
For the first chamber to keep left and the second chamber kept right, the swash plate of hydraulic pump 4 is connected to the pars intermedia of piston by head rod 24
Point.
In other embodiments, oil cylinder 3 can also replace with other structures, as long as can temporarily oil storage and be become by oil pressure
Change can drive the swash plate of hydraulic pump 4 to deflect.
Further, displacement sensor, the spool and head rod of proportional control valve 23 are equipped with proportional control valve 23
24 are connected by the second connecting rod 25, and displacement sensor detects the displacement variable of the second connecting rod 25, and testing result is sent out
Send to controller, controller and be adjusted according to the testing result comparative example control valve 23 of displacement sensor.
By setting displacement sensor and the second connecting rod 25, when unexpected deflection occurs for the swash plate of hydraulic pump 4, swash plate
Deflection can reflect in 24 and second connecting rod 25 of head rod, and the position of the second connecting rod 25 is detected in displacement sensor
It when shifting changes, can be adjusted with notification controller comparative example control valve 23, it is recovered setting aperture, so as to ensure liquid
The discharge capacity of press pump 4 is stablized.
Alternatively, drive system further includes pressure sensor 21, and pressure sensor 21 is used for the pressure for detecting drive system,
Pressure sensor 21 is connected with controller signals, the system pressure value of detection is transferred to controller, controller can obtain
The rotating speed and moment of torsion of engine 2, and adjusted according to system pressure value, the rotating speed of engine 2 and moment of torsion comparative example control valve 23
Section.
Specifically, on the premise of the output power of engine 2 is certain, when the load of host increases suddenly, system pressure
Power increases, if the rotating speed of engine 2 is constant, the power of host can increase, and can so make in sand making machine in addition to host
The power drop that other executing agencies get.To make the power that other executing agencies get constant, ensure in addition to host
Other executing agencies can work normally, can be by way of reducing the discharge capacity of hydraulic pump 4 come the power of control main frame, therefore
The system pressure value detected according to the rotating speed of the engine 2 of acquisition and moment of torsion and pressure sensor, controller can be with comparative example
The aperture of control valve 23 is adjusted, so adjust hydraulic pump 4 discharge capacity, to avoid load on host computers change to except host it
The influence for the power that other outer executing agencies are got.
Alternatively, drive system further includes electric proportional pressure control valve 13 and controller, electric proportional pressure control valve 13 and hydraulic motor
15 are connected in parallel, and the control terminal of electric proportional pressure control valve 13 is connected with controller signals, and controller can adjust electric proportional pressure control valve
13 oil pressure relief, so that electric proportional pressure control valve 13 opens or closes.
By setting electric proportional pressure control valve 13, can be controlled by the size of the oil pressure relief of the electric proportional pressure control valve 13 of adjusting
The electric proportional pressure control valve 13 of system is turned on and off.Specifically, when proportional control valve 23 has signal input, controller is to electric ratio
Overflow valve 13 sends signal, and it is that (the maximum oil pressure relief should be greater than hereafter to maximum oil pressure relief to set electric proportional pressure control valve 13
The first overflow valve 9 and the setting value of the second overflow valve 10 that can be mentioned), electric proportional pressure control valve 13 is in cut-off state, liquid at this time
For the outlet high-pressure oil flow of press pump 4 through hydraulic motor 15, hydraulic motor 15 drives the work of sand making machine host main shaft；Work as proportional control valve
When 23 no signals input (for example signal is lost suddenly) or engine stop working suddenly, hydraulic pump 4 is in closure state, hydraulic motor
15 power cut, but at this time under effect of inertia, sand making machine host main shaft can by belt pulley it is counter drag hydraulic motor 15 after
Continuous to rotate at a high speed, the high-low pressure oil circuit switching of hydraulic motor 15, hydraulic motor 15 is transformed into pump, at this time can by controller to
Electric proportional pressure control valve 13 sends signal, and electric proportional pressure control valve 13 is in less oil pressure relief, (this oil pressure relief is much smaller than most
Big oil pressure relief) under, hydraulic motor 15 forms closed circuit with electric proportional pressure control valve 13 at this time, avoids to belt drive system
Impact, while electric proportional pressure control valve 13 becomes load, and hydraulic oil is by the electric acting of proportional pressure control valve 13 fever, by sand making machine master
The kinetic energy of owner's axis is converted into thermal energy, realizes sand making machine host quick shutdown.
Alternatively, the first hydraulic fluid port of hydraulic pump 4 passes through the first oil communication, hydraulic pump with the first hydraulic fluid port of hydraulic motor 15
4 the second hydraulic fluid port, by the second oil communication, to form closed cycle oil circuit, is so set with the second hydraulic fluid port of hydraulic motor 15
The transmission efficiency of fluid power system can be improved.
Drive system further includes slippage pump 18, and slippage pump 18 is used to give closed cycle oil circuit repairing.By setting slippage pump
18, the problems such as closed cycle oil circuit can be prevented to be emptied due to the pressure loss, ensure hydraulic pump 4 and hydraulic motor 15
Normal operation, improves the service life of hydraulic pump 4 and hydraulic motor 15.
Further, the oil inlet of slippage pump 18 is connected with fuel tank, the oil outlet of slippage pump 18 and the first oil communication, and
Connection oil circuit between the oil outlet of slippage pump 18 and the first oil circuit is equipped with the first check valve 11, the oil outlet of slippage pump 18 with
Second oil communication, and the connection oil circuit between the oil outlet of slippage pump 18 and the second oil circuit is equipped with the second check valve 12.
Further, drive system further include first overflow valve 9 in parallel with the first check valve 11 and with the second check valve
12 second overflow valves 10 in parallel., can be in the first oil circuit or the second oil by setting the first overflow valve 9 and the second overflow valve 10
Overflow is carried out to fluid when high pressure occurs in road, prevents impacting with high pressure, is conducive to protect hydraulic pump 4 and hydraulic motor 15.
Alternatively, drive system further includes motor 17, the storage battery powered for motor 17 and for adjusting 4 discharge capacity of hydraulic pump
Proportional control valve 23, motor 17 be used for drive slippage pump 18 to work, the oil outlet of slippage pump 18 is connected with proportional control valve 23,
So that oil sources of the slippage pump 18 as proportional control valve 23.By the setting, the failure problems such as can occur damaging in engine 2
When, ensure the normal operation of circulating oil path between hydraulic pump 4 and hydraulic motor 15 by storage battery, prevent due to engine 2
Shut down suddenly and damage hydraulic pump 4 and hydraulic motor 15.
Alternatively, the connection oil circuit between the oil outlet of slippage pump 18 and proportional control valve 23 is equipped with one-way throttle valve group
22, which includes check valve and the restricting element (such as damping hole) being connected in parallel with check valve, by setting
One-way throttle valve group 22 is put, can prevent hydraulic oil comparative example control valve 23 and oil cylinder 3 from causing to impact.
Alternatively, the connection oil circuit between the oil outlet of slippage pump 18 and proportional control valve 23 is equipped with the second filter
20, to filter to entering the hydraulic oil in proportional control valve 23 and oil cylinder 3, prevent from blocking.
Alternatively, drive system further includes pressure limiting device, and pressure limiting device can reach pressure limiting dress in the pressure of drive system
Open, hydraulic oil is guided into the working oil path that can reduce the discharge capacity of hydraulic pump 4 during the pressure limit value put.By setting
Pressure limiting device is put, directly can guide hydraulic oil into ratio when the pressure of drive system reaches the pressure limit value of pressure limiting device
On connection oil circuit between example control valve 23 and oil cylinder 3, so as to adjust the position of 3 inner carrier of oil cylinder, and then hydraulic pump 4 is adjusted
Discharge capacity, realizes the control to drive system pressure.
Specifically, drive system further includes the first pressure limiting valve 7, the second pressure limiting valve 8 and the ratio for adjusting 4 discharge capacity of hydraulic pump
Example control valve 23, the first pressure limiting valve 7 are connected to the oil outlet of the first check valve 11 and the first actuator port of proportional control valve 23
Between, the second pressure limiting valve 8 is connected between the oil outlet of the second check valve 12 and the second actuator port of proportional control valve 23.The
The pressure limit value of one pressure limiting valve 7 is less than the pressure limit value of the first overflow valve 9；The pressure limit value of second pressure limiting valve 8 is less than
The pressure limit value of second overflow valve 10.
Further, the 3rd check valve is equipped between the oil inlet of the oil outlet of the first pressure limiting valve 7 and the first check valve 11
5, the 4th check valve 6 is equipped between the oil outlet of the second pressure limiting valve 8 and the oil inlet of the second check valve 12.
When the first pressure limiting valve 7 is opened, the 3rd check valve 5 plays back pressure effect, it is ensured that hydraulic oil smoothly flows to ratio
Connection oil circuit between example control valve 23 and oil cylinder 3, while when the hydraulic fluid pressure out of first pressure limiting valve 7 out is larger,
First oil circuit can also be flowed back to by the 3rd check valve 5 and the first check valve 11；Correspondingly, when the second pressure limiting valve 8 is opened, the
Four check valves 6 play back pressure effect, it is ensured that hydraulic oil smoothly flows to the connection oil between proportional control valve 23 and oil cylinder 3
Road, while when the hydraulic fluid pressure out of second pressure limiting valve 8 out is larger, can also be single by the 4th check valve 6 and second
The second oil circuit is flowed back to valve 12.
Alternatively, drive system, which further includes, rinses valve group 14, the first hydraulic fluid port of hydraulic pump 4 and the first oil of hydraulic motor 15
Mouth passes through the second oil communication, punching by the first oil communication, the second hydraulic fluid port of hydraulic pump 4 with the second hydraulic fluid port of hydraulic motor 15
Wash valve group 14 to be connected between the first oil circuit and the second oil circuit, rinse valve group 14 and be used to make the low pressure oil liquid stream in drive system to return
Fuel tank.By the flushing valve group 14, in addition to ensureing that the low pressure fluid in drive system can flow back to fuel tank, can also lead to
Crossing the flushing valve group 14 flows out the high temperature oil in drive system, and fills into low-temperature oil by slippage pump 18, realizes that fluid cools down
Effect；In addition, by the displacement of fluid, filter can also be utilized by the contaminant filter in the fluid for the system that flows through, raising
The degree of purity of circulation fluid, avoids blocking in system.
Alternatively, first filter 16 is equipped between fuel tank 1 and slippage pump 18, with to enter slippage pump 18 hydraulic oil into
Row filtering, prevents from blocking.
The operation principle of one embodiment of sand making machine of the present invention is illustrated with reference to Fig. 1：
Sand making machine includes host and the drive system for driving host to operate, as shown in Figure 1, drive system is mainly wrapped
Include：Controller, fuel tank 1, engine 2, oil cylinder 3, hydraulic pump 4, the 3rd check valve 5, the 4th check valve 6, the first pressure limiting valve 7,
Two pressure limiting valves 8, the first overflow valve 9, the second overflow valve 10, the first check valve 11, the second check valve 12, electric proportional pressure control valve 13,
Rinse valve group 14, hydraulic motor 15, first filter 16, motor 17, slippage pump 18, the 3rd overflow valve 19, the second filter 20,
Pressure sensor 21, one-way throttle valve group 22 and proportional control valve 23.
Engine 2 is connected with hydraulic pump 4, and power source of the engine 2 as drive system, power is provided for sand making machine, hair
The start and stop of motivation 2 and its rotating speed are controlled by controller.Hydraulic pump 4 is driven by engine 2, and hydraulic pump 4 produces high pressure oil,
High pressure oil enters hydraulic motor 15, drives hydraulic motor 15 to rotate, and hydraulic motor 15 drives the host of sand making machine by V belt translation
Rotation, hydraulic oil enter back into the inlet port of hydraulic pump 4 after hydraulic motor 15, form closed hydraulic loop.
The discharge capacity of hydraulic pump 4 is controlled by the input signal of proportional control valve 23, and the signal of proportional control valve 23 is by controller
Input.When 23 no signal of proportional control valve inputs, spool is in middle position, and the variable swash plate inside hydraulic pump 4 is in resetting spring
Under the action of be in zero-displacement condition, hydraulic motor 15 and the host of sand making machine are failure to actuate；When proportional control valve 23 has signal
During input, valve core movement, the hydraulic oil that slippage pump 18 exports enters oil cylinder 3 by proportional control valve 23, the fortune of piston in oil cylinder 3
It is dynamic to change the inclination angle of 4 built-in variable swash plate of hydraulic pump, just it is up between negative maximum so as to control the discharge capacity of hydraulic pump 4 to be maintained at
Optional position, the displacement size of hydraulic pump 4 is directly proportional to the input signal size of proportional control valve 23, so as to fulfill to hydraulic pressure horse
Up to 15 stepless speed regulation.
The outlet of hydraulic pump 4 is connected with pressure sensor 21, the pressure of 21 monitoring driving system of pressure sensor, and will press
Force signal is sent to controller, and controller reads the rotating speed and moment of torsion of engine 2 at the same time, and controller is according to pressure sensor 21
Detect pressure and 2 rotating speed of engine and torque parameter adjusts the discharge capacity of hydraulic pump 4, improve the energy of system attack short-time load impact
Power.When system pressure is higher than setting value (setting value is depending on the rotating speed of the power of engine 2, rotating speed and host), control
Device processed can send the signal for reducing current input value to proportional control valve 23, and then reduce the discharge capacity of hydraulic pump 4, make the work(of host
Rate is controlled in setting range, ensures that other executing agencies in sand making machine in addition to host being capable of normal operation；Work as system
When pressure is less than setting value, controller can send the signal of increase current input value to proportional control valve 23, make the row of hydraulic pump 4
Amount is recovered to discharge capacity corresponding with system pressure setting value before.
When system pressure reaches the pressure limit value of the first pressure limiting valve 7 or the second pressure limiting valve 8, the first pressure limiting valve 7 or the
Two pressure limiting valves 8 are opened rapidly, and then promote the swash plate of hydraulic pump 4 to be moved to middle position, to reduce the discharge capacity of hydraulic pump 4, reach limit
The effect of system pressure processed, the 3rd check valve 5 and the 4th check valve 6 play back pressure effect at this time.
When system pressure continues rise, the first overflow valve 9 and the second overflow valve 10 play overvoltage protection.
Motor 17 is connected using storage battery as power source, motor 17 with slippage pump 18, is in sand making machine host work
Slippage pump 18 provides power, even if engine 2 stops working suddenly, remains to provide power for slippage pump 18, ensures slippage pump 18 in short-term
Interior normal work.
The oil suction from fuel tank 1 of slippage pump 18, hydraulic oil enter slippage pump 18 through first filter 16, pressurize through slippage pump 18
Afterwards by the second filter 20, wherein entering proportional control valve 23 by one-way throttle valve group 22 all the way, 4 row of hydraulic pump is controlled
Amount；Another way enters the low pressure chamber at 15 both ends of hydraulic motor through the first check valve 11 or the second check valve 12, supplements closed system
Because rinsing and revealing the hydraulic oil of loss in pipeline.
Wherein, throttle orifice built in one-way throttle valve group 22, can prevent hydraulic oil comparative example control valve 23 and oil cylinder 3 from causing
Impact.The outlet of slippage pump 18 is connected with the 3rd overflow valve 19, and the 3rd overflow valve 19 is connected with fuel tank 1, ensures repairing and control
Pressure is not higher than the pressure set points of the 3rd overflow valve 19, plays system protection.It is additionally provided with circuit and rinses valve group 14, can be with
Ensure that part low pressure oil liquid is returned directly to fuel tank by housing in performance loop, can also play cooling cycle fluid and filtering
Effect.
Electric proportional pressure control valve 13 is in parallel with hydraulic motor 15, and electric proportional overflow can be controlled by sending electric signal by controller
The oil pressure relief of valve 13, and oil pressure relief is directly proportional to electric signal.When the systems are operating normally, electric proportional pressure control valve 13 is set
Oil pressure relief is maximum, to be at cut-off state；When engine stops working suddenly, overflowing for electric proportional pressure control valve 13 is set
Flowing pressure is smaller value, to be turned on, so that hydraulic motor 15 forms closed circuit with electric proportional pressure control valve 13, is avoided pair
The impact of belt drive system, while be conducive to make sand making machine host quick shutdown.Slippage pump 18 and flushing valve group during being somebody's turn to do
14 are constantly in working status, are emptied and radiate to carry out lasting repairing and flushing, anti-locking system to drive system.
Pass through the explanation of multiple embodiments to sand making machine of the present invention, it can be seen that sand making machine embodiment of the present invention at least has
There is one or more of advantage：
1st, commercial power is not depended on as power source, complete machine work using engine, lacks commercial power in field etc.
Occasion remains to work normally；Using hydraulic-driven, frequent starting, while compact overall structure can be realized, small, weight is only
Have the 1/5~1/10 of same power motor, can apply in the portable sand making machine of spaces compact；Motor driving is not used may be used also
It is cost-effective to save transformer；
2nd, by setting electric proportional pressure control valve, its oil pressure relief can be adjusted, is inputted in proportional control valve no signal
Or engine can be such that hydraulic motor is closed back with electric proportional pressure control valve composition when stopping working suddenly by reducing oil pressure relief
Road, realizes the protection to belt drive system, can also reduce the downtime of sand making machine main rotor；
3rd, by using proportional control valve, the rotating speed of sand making machine main shaft can be made to realize step-less adjustment, save manpower and when
Between；
4th, host driven uses closed type hydraulic system, transmission efficiency；
5th, pressure sensor is equipped with drive system, can be with real-time monitoring system pressure, with reference to engine speed and moment of torsion
It etc. parameter, can in real time be adjusted with comparative example control valve, and then control the discharge capacity of hydraulic pump；
6th, slippage pump is used as system repairing, and reliability is high；Slippage pump is driven using storage battery and motor at the same time, can sent out
Motivation ensures that slippage pump remains to normal operation when stopping working suddenly.
Finally it should be noted that：The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof；To the greatest extent
The present invention is described in detail with reference to preferred embodiments for pipe, those of ordinary skills in the art should understand that：Still
It can modify to the embodiment of the present invention or equivalent substitution is carried out to some technical characteristics；Without departing from this hair
The spirit of bright technical solution, it should all cover among the claimed technical solution scope of the present invention.
Claims (15)
1. a kind of sand making machine, including host and the drive system for driving the host operating, it is characterised in that the drive system
Including engine (2), hydraulic pump (4) and hydraulic motor (15), the engine (2) is drivingly connected with the hydraulic pump (4), institute
State hydraulic pump (4) to be connected by fluid pressure line with the hydraulic motor (15), the hydraulic motor (15) is connected with the host
To drive the host to rotate.
2. sand making machine according to claim 1, it is characterised in that the hydraulic pump (4) is variable pump, by described in adjusting
The discharge capacity of hydraulic pump (4) adjusts the velocity of rotation of the host.
3. sand making machine according to claim 2, it is characterised in that the drive system further include proportional control valve (23),
Oil cylinder (3) and controller, the cylinder barrel of the oil cylinder (3) is interior to be equipped with piston so that the cylinder barrel is separated to form two chambers, the ratio
Example control valve (23) two actuator ports connect respectively with two chambers of the oil cylinder (3), the swash plate of the hydraulic pump (4) and
The piston connection, the control terminal of the proportional control valve (23) are connected with the controller signals, and the controller passes through tune
The aperture for saving the proportional control valve (23) controls the piston movement, the inclination angle hair of the mobile drive swash plate of the piston
Changing, so as to fulfill the step-less adjustment to the hydraulic pump (4) discharge capacity.
4. sand making machine according to claim 3, it is characterised in that the swash plate of the hydraulic pump (4) passes through with the piston
Head rod (24) connects, and displacement sensor, the valve of the proportional control valve (23) are equipped with the proportional control valve (23)
Core is connected with the head rod (24) by the second connecting rod (25), and institute's displacement sensors detect second connecting rod
(25) displacement variable, and testing result is sent to the controller, the controller is according to institute's displacement sensors
The proportional control valve (23) is adjusted in testing result.
5. sand making machine according to claim 3, it is characterised in that the drive system further includes pressure sensor (21),
The pressure sensor (21) is used for the pressure for detecting the drive system, and the pressure sensor (21) is believed with the controller
Number connection, the system pressure value of detection is transferred to the controller, the controller can obtain the engine (2)
Rotating speed and moment of torsion, and according to the system pressure value, the rotating speed of the engine (2) and moment of torsion to the proportional control valve (23)
It is adjusted.
6. sand making machine according to claim 1, it is characterised in that the drive system further includes electric proportional pressure control valve (13)
And controller, the electricity proportional pressure control valve (13) are connected in parallel with the hydraulic motor (15), the electricity proportional pressure control valve (13)
Control terminal be connected with the controller signals, the controller can adjust the overflow pressure of the electric proportional pressure control valve (13)
Power, so that the electricity proportional pressure control valve (13) opens or closes.
7. sand making machine according to claim 1, it is characterised in that the first hydraulic fluid port of the hydraulic pump (4) and the hydraulic pressure
First hydraulic fluid port of motor (15) passes through the first oil communication, the second hydraulic fluid port and the hydraulic motor (15) of the hydraulic pump (4)
The second hydraulic fluid port by the second oil communication, to form closed cycle oil circuit, the drive system further includes slippage pump (18), institute
Slippage pump (18) is stated to be used for the closed cycle oil circuit repairing.
8. sand making machine according to claim 7, it is characterised in that the oil inlet of the slippage pump (18) is connected with fuel tank,
The oil outlet of the slippage pump (18) and first oil communication, and the oil outlet of the slippage pump (18) and the described first oil
Connection oil circuit between road is equipped with the first check valve (11), and oil outlet and second oil circuit of the slippage pump (18) connect
It is logical, and the connection oil circuit between the oil outlet of the slippage pump (18) and second oil circuit is equipped with the second check valve (12).
9. sand making machine according to claim 8, it is characterised in that the drive system further includes and first check valve
(11) the first overflow valve (9) in parallel and the second overflow valve (10) in parallel with second check valve (12).
10. sand making machine according to claim 7, it is characterised in that the drive system further includes motor (17), is described
The storage battery of motor (17) power supply and the proportional control valve (23) for adjusting the hydraulic pump (4) discharge capacity, the motor (17)
For driving the slippage pump (18) to work, the oil outlet of the slippage pump (18) is connected with the proportional control valve (23), with
Make oil sources of the slippage pump (18) as the proportional control valve (23).
11. sand making machine according to claim 10, it is characterised in that the oil outlet of the slippage pump (18) and the ratio
Connection oil circuit between control valve (23) is equipped with check valve and the restricting element being connected in parallel with the check valve.
12. sand making machine according to claim 1, it is characterised in that the drive system further includes pressure limiting device, the limit
Pressure device can be opened when the pressure of the drive system reaches the pressure limit value of the pressure limiting device, and hydraulic oil is drawn
To in the working oil path that can reduce the discharge capacity of the hydraulic pump (4).
13. sand making machine according to claim 8, it is characterised in that the drive system further include the first pressure limiting valve (7),
Second pressure limiting valve (8) and the proportional control valve (23) for adjusting the hydraulic pump (4) discharge capacity, first pressure limiting valve (7) is even
It is connected between the oil outlet of first check valve (11) and the first actuator port of the proportional control valve (23), described second
Pressure limiting valve (8) be connected to the oil outlet of second check valve (12) and the proportional control valve (23) the second actuator port it
Between.
14. sand making machine according to claim 13, it is characterised in that the oil outlet of first pressure limiting valve (7) with it is described
It is equipped with the 3rd check valve (5) between the oil inlet of first check valve (11), the oil outlet of second pressure limiting valve (8) and described the
The 4th check valve (6) is equipped between the oil inlet of two check valves (12).
15. sand making machine according to claim 1, it is characterised in that the drive system, which further includes, rinses valve group (14), institute
First hydraulic fluid port of the first hydraulic fluid port and the hydraulic motor (15) of stating hydraulic pump (4) passes through the first oil communication, the hydraulic pump
(4) the second hydraulic fluid port of the second hydraulic fluid port and the hydraulic motor (15) is connected by the second oil communication, the flushing valve group (14)
It is connected between first oil circuit and second oil circuit, the valve group (14) of rinsing is used to make the low pressure in the drive system
Fluid flows back to fuel tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711372726.8A CN107917112A (en) | 2017-12-19 | 2017-12-19 | Sand making machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711372726.8A CN107917112A (en) | 2017-12-19 | 2017-12-19 | Sand making machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107917112A true CN107917112A (en) | 2018-04-17 |
Family
ID=61893556
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711372726.8A Withdrawn CN107917112A (en) | 2017-12-19 | 2017-12-19 | Sand making machine |
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| Country | Link |
|---|---|
| CN (1) | CN107917112A (en) |
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| CN204755430U (en) * | 2015-05-06 | 2015-11-11 | 徐工集团工程机械股份有限公司江苏徐州工程机械研究院 | Broken host computer actuating system |
| CN106837825A (en) * | 2017-02-21 | 2017-06-13 | 北京航天发射技术研究所 | One kind transmission cooling system and cooling control method |
| CN207795705U (en) * | 2017-12-19 | 2018-08-31 | 徐工集团工程机械有限公司 | Sand making machine |
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2017
- 2017-12-19 CN CN201711372726.8A patent/CN107917112A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101201069A (en) * | 2007-12-18 | 2008-06-18 | 浙江大学 | Variable frequency pump-control-motor closed circuit based on energy regulation |
| CN202362632U (en) * | 2011-11-11 | 2012-08-01 | 昆明中铁大型养路机械集团有限公司 | Shock-free starting control device |
| CN103754781A (en) * | 2013-12-31 | 2014-04-30 | 浙江三一装备有限公司 | Hydraulic system and crane |
| CN103967859A (en) * | 2014-05-23 | 2014-08-06 | 兰州兰石集团有限公司 | Closed hydraulic system for controlling stable rotation of upper roller on four-roller veneer reeling machine |
| CN204755430U (en) * | 2015-05-06 | 2015-11-11 | 徐工集团工程机械股份有限公司江苏徐州工程机械研究院 | Broken host computer actuating system |
| CN106837825A (en) * | 2017-02-21 | 2017-06-13 | 北京航天发射技术研究所 | One kind transmission cooling system and cooling control method |
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Effective date of registration: 20220727 Address after: 221004 26 Tuo Lan Shan Road, Xuzhou economic and Technological Development Zone, Jiangsu Applicant after: JIANGSU XUGONG ENGINEERING MACHINERY RESEARCH INSTITUTE Co.,Ltd. Address before: 221004 26 Tuo Lan Shan Road, Xuzhou economic and Technological Development Zone, Jiangsu Applicant before: XCMG CONSTRUCTION MACHINERY Co.,Ltd. |
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