CN205315366U - Prevent that engineering vehicle hydraulic drive system pressure from rising device suddenly - Google Patents
Prevent that engineering vehicle hydraulic drive system pressure from rising device suddenly Download PDFInfo
- Publication number
- CN205315366U CN205315366U CN201521139627.1U CN201521139627U CN205315366U CN 205315366 U CN205315366 U CN 205315366U CN 201521139627 U CN201521139627 U CN 201521139627U CN 205315366 U CN205315366 U CN 205315366U
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- China
- Prior art keywords
- electromagnetic valve
- system pressure
- engineering truck
- motor
- valve
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Abstract
The utility model relates to a prevent that engineering vehicle hydraulic drive system pressure from rising device suddenly, including the force cell sensor who is used for recording engineering vehicle hydraulic drive system pressure, engineering vehicle hydraulic drive system includes variable pump and the motor that connects gradually with the engine, the motor both ends first solenoid valve that connects in parallel, and the energy storage ware is connected to first solenoid valve, force cell sensor and first solenoid valve are connected respectively and are used for judging whether the system pressure reaches the peak value to control the controller of first solenoid valve switch. The utility model discloses pressure that can real -time supervision hydraulic drive system is judged, when the system pressure reaches the peak value, opens first solenoid valve through the controller, makes fluid get into energy storage ware china insurance company, ltd through first solenoid valve and leaves, prevents effectively that hydraulic drive system's pressure from rising suddenly, can effectively protect hydraulic drive system.
Description
[technical field]
This utility model relates to engineering truck field, is specifically related to one and prevents engineering truck fluid power system pressure from rising sharply device.
[background technology]
Hydraulic-driven engineering truck is due to no-clutch, generally can not be made directly power out of supply, and control system and have hydraulic pump and hydraulic motor to jointly control, pump is slower with motor response speed, system pressure is caused to rise sharply when system runs into peak load, hydraulic system not only can be made to cause impacting with high pressure, cause problem, the maneuverability of machine and the comfortablenesses such as high oil temperature, Hydraulic Elements shortening in service life that bad seals, system overflow cause to be deteriorated. This type of vehicle launch speed is slow, and energy recycling rate is not high.
[summary of the invention]
The purpose of this utility model is in that to overcome problems of the prior art, it is provided that one prevents engineering truck fluid power system pressure from rising sharply device, effectively protects hydraulic system.
In order to achieve the above object, this utility model adopts the following technical scheme that
Including the force cell for recording engineering truck fluid power system pressure; Engineering truck fluid power system includes the variable pump and the motor that are sequentially connected with electromotor, motor two ends the first electromagnetic valve in parallel, and the first electromagnetic valve connects accumulator; Force cell and the first electromagnetic valve connect respectively for judging whether system pressure reaches peak value, and control the controller of the first electromagnetic valve switch.
Further, the first electromagnetic valve adopts three two electric change valves, and including stop valve and for connecting left position check valve and the right position check valve of motor and accumulator, and the communication direction of left position check valve and right position check valve is contrary.
Further, the right position check valve communication direction of the first electromagnetic valve is from motor to accumulator; Right position check valve includes the moving iron core and the main valve plug that arrange before and after liquid stream direction, and moving iron core connects secured core by back-moving spring, is provided with induction coil between moving iron core and secured core, and moving iron core can pass induction coil; The outer cover of secured core is provided with magnet exciting coil.
Further, the engine flywheel of engineering truck being provided with tachogenerator, tachogenerator is connected with controller.
Further, motor adopts reversing motor, and reversing motor is provided with rotation direction sensor; The two ends parallel connection of reversing motor contains the second electromagnetic valve of forward drive working position and reverse drive working position, and the second electromagnetic valve connects the first electromagnetic valve; Rotation direction sensor and the second electromagnetic valve are all connected with controller.
Further, the second electromagnetic valve adopts two-position four-way solenoid directional control valve.
Compared with prior art, this utility model has following useful technique effect:
This utility model is by arranging force cell, the pressure of fluid power system can be monitored in real time, and whether reach peak value by controller real-time judge force value, when reaching peak value, by opening the first electromagnetic valve, make fluid enter in accumulator through the first electromagnetic valve to preserve, effectively prevent the pressure of fluid power system from rising sharply; When system pressure is normal, the first closed electromagnetic valve, the completely work of not influential system. This utility model is while ensureing hydraulic-driven engineering truck normal brake application and controlling device rapidity, can effectively prevent system pressure peak value excessive, eliminate hydraulic system latch-up phenomenon, it is prevented that hydraulic oil temperature is too high and improves service life etc. of electromotor and Hydraulic Elements; This utility model simple in construction, application is convenient, it is possible to effectively protect fluid power system.
Further, this utility model the first electromagnetic valve includes stop valve, left position check valve and right position check valve, while preventing system pressure from rising sharply, additionally it is possible to fluid is fed back to fluid power system, particularly in vehicle launch process so that vehicle launch speed accelerates and stable.
Further, this utility model is by arranging tachogenerator, it is possible to coordinate force cell work, it is simple to whether checking pressure measxurement is accurate.
Further, this utility model is by arranging rotation direction sensor and the second electromagnetic valve, it is simple to coordinate reversing motor work.
[accompanying drawing explanation]
Fig. 1 is structural representation of the present utility model.
Fig. 2 is this utility model the first electromagnetic valve right position operation principle schematic diagram.
Wherein: 1 reversing motor; 2 second electromagnetic valves; 3 controllers; 4 tachogenerators; 5 force cells; 6 rotation direction sensors; 7 accumulators; 8 first electromagnetic valves;
8-1: main valve plug; 8-2: moving iron core; 8-3: induction coil; 8-4: secured core; 8-5: magnet exciting coil; 8-6: back-moving spring.
[detailed description of the invention]
Below in conjunction with accompanying drawing, this utility model is described in further details.
As it is shown in figure 1, this utility model includes the tachogenerator 4 for recording engineering vehicle engine rotating speed, and for recording the force cell 5 of engineering truck fluid power system pressure. Tachogenerator 4 is arranged on the engine flywheel of engineering truck. Engineering truck fluid power system includes the variable pump and the motor that are sequentially connected with electromotor, and motor adopts the reversing motor 1 of hydraulic pressure, one end link variable pump of reversing motor 1; Reversing motor 1 is provided with rotation direction sensor 6; The two ends parallel connection of reversing motor 1 contains the second electromagnetic valve 2 of forward drive working position and reverse drive working position, and the second electromagnetic valve 2 connects the first electromagnetic valve 8; First electromagnetic valve 8 connects accumulator 7; Tachogenerator 4, force cell 5, rotation direction sensor the 6, first electromagnetic valve 8 and the second electromagnetic valve 2 connect controller 3 respectively through circuit, controller 3 is used for judging whether engine speed and system pressure reach peak value, and controls the first electromagnetic valve 8 and switch and the working position direction of the second electromagnetic valve 2.
First electromagnetic valve 8 adopts three two electric change valves, and including stop valve and for connecting left position check valve and the right position check valve of reversing motor 1 and accumulator 7, and the communication direction of left position check valve and right position check valve is contrary, forms 3 working positions; Wherein cut-off position does not have fluid to flow; The check valve connection of right position is the direction from the second electromagnetic valve 2 to accumulator 7, and fluid can only flow to accumulator 7 from system, for groundwork position; The check valve connection of left position is the direction from accumulator 7 to the second electromagnetic valve 2, it is ensured that fluid can only flow to system from accumulator 7. Second electromagnetic valve 2 adopts two-position four-way solenoid directional control valve, has 2 working positions, and upper is reverse drive working position, and bottom is forward drive working position.
As shown in Figure 2, right position check valve includes the moving iron core 8-2 and the main valve plug 8-1 that arrange before and after liquid stream direction, moving iron core 8-2 connects secured core 8-4 by back-moving spring 8-6, it is provided with induction coil 8-3, moving iron core 8-2 between moving iron core 8-2 and secured core 8-4 and can pass induction coil 8-3; The outer cover of secured core 8-4 is provided with magnet exciting coil 8-5.
Work process of the present utility model and principle are as follows:
Under forward drive and steady operating mode, the first electromagnetic valve 8 is in cut-off position, and the second electromagnetic valve 2 is in bottom. during the work of hydraulic-driven engineering truck, the pressure of force cell 5 and tachogenerator 4 real-time monitoring system and the rotating speed of reversing motor 1, and send a signal to controller 3, controller 3 controls the operating position of the first electromagnetic valve 8, when system monitoring to pressure peak, now electromotor is fluctuated by impacting with high pressure rotating speed because of system, controller 3 is signaled to the first electromagnetic valve 8, it is made to open right position check valve, fluid enters in accumulator 7 through the first right position of electromagnetic valve 8 and preserves, middle position is returned to after working several seconds, working time determines according to the response time of peak value size and variable pump, the pressure of effective anti-locking system rises sharply, when vehicle parking starts, enabling signal is transmitted a signal to controller 3 by rotation direction sensor 6, controller controls 8 left one-way valve opens of the first electromagnetic valve, in accumulator 7 fluid through the first left bit stream of electromagnetic valve 8 through reversing motor 1 so that vehicle launch speed accelerates and stable.
When vehicle backing travels, reversing motor 1 rotates backward, and by rotation direction sensor 6 perception and transmit a signal to controller 3, and then to control the second electromagnetic valve 2 commutation be upper work, consistent when now the operation principle of this system and device is with forward.
The key device that this utility model can quick and precisely respond is 8 right reliably workings of the first electromagnetic valve, its principle is as shown in Figure 2, when system stability works, moving iron core 8-2 is in poised state under the effect of back-moving spring 8-6, now induction coil 8-3 there is no induction electromotive force, when occurring that immense pressure fluctuates, according to Newton's second law () it can be seen that moving iron core 8-2 produces huge acceleration, force moving iron core 8-2 to move right rapidly, penetrate induction coil 8-3, and then on induction coil 8-3, induce electromotive force (induction electromotive force under the effect of magnet exciting coil 8-5), and deliver to controller 3, and judging whether to reach peak value condition in controller 3, send a control signal to main valve plug 8-1 when reaching, main valve plug 8-1 opens under the effect of control signal, makes fluid enter accumulator 7, thus alleviating system pressure; According to arranging peak value gear, thus sending different control signals, main valve plug opening speed can also be made different different from opening. After treating that pressure is steadily, main valve is closed.
This utility model is prevented from engineering truck fluid power system pressure and rises sharply and power-assisted startup; this utility model apparatus structure is simple; application is convenient; can effectively protect hydraulic system; effectively prevent from sharply changing because of pressure in the course of the work the damage to system, and improve startup stability and the rapidity of system.
Claims (6)
1. one kind prevents engineering truck fluid power system pressure from rising sharply device, it is characterised in that include the force cell (5) for recording engineering truck fluid power system pressure; Engineering truck fluid power system includes the variable pump and the motor that are sequentially connected with electromotor, motor two ends the first electromagnetic valve (8) in parallel, and the first electromagnetic valve (8) connects accumulator (7); Force cell (5) and the first electromagnetic valve (8) connect respectively and are used for judging whether system pressure reaches peak value, and control the controller (3) that the first electromagnetic valve (8) switchs.
2. one according to claim 1 prevents engineering truck fluid power system pressure from rising sharply device, it is characterized in that, first electromagnetic valve (8) adopts three two electric change valves, including stop valve and for connecting left position check valve and the right position check valve of motor and accumulator (7), and the communication direction of left position check valve and right position check valve is contrary.
3. one according to claim 2 prevents engineering truck fluid power system pressure from rising sharply device, it is characterised in that the right position check valve communication direction of the first electromagnetic valve (8) is from motor to accumulator (7); Right position check valve includes the moving iron core (8-2) and the main valve plug (8-1) that arrange before and after liquid stream direction, moving iron core (8-2) connects secured core (8-4) by back-moving spring (8-6), being provided with induction coil (8-3) between moving iron core (8-2) and secured core (8-4), moving iron core (8-2) can pass induction coil (8-3); The outer cover of secured core (8-4) is provided with magnet exciting coil (8-5).
4. one according to claim 1 prevents engineering truck fluid power system pressure from rising sharply device, it is characterized in that, being provided with tachogenerator (4) on the engine flywheel of engineering truck, tachogenerator (4) is connected with controller (3).
5. one according to claim 1 prevents engineering truck fluid power system pressure from rising sharply device, it is characterised in that motor adopts reversing motor (1), and reversing motor (1) is provided with rotation direction sensor (6); The two ends parallel connection of reversing motor (1) contains second electromagnetic valve (2) of forward drive working position and reverse drive working position, and the second electromagnetic valve (2) connects the first electromagnetic valve (8); Rotation direction sensor (6) and the second electromagnetic valve (2) are all connected with controller (1).
6. one according to claim 5 prevents engineering truck fluid power system pressure from rising sharply device, it is characterised in that the second electromagnetic valve (2) adopts two-position four-way solenoid directional control valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521139627.1U CN205315366U (en) | 2015-12-31 | 2015-12-31 | Prevent that engineering vehicle hydraulic drive system pressure from rising device suddenly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521139627.1U CN205315366U (en) | 2015-12-31 | 2015-12-31 | Prevent that engineering vehicle hydraulic drive system pressure from rising device suddenly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205315366U true CN205315366U (en) | 2016-06-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521139627.1U Expired - Fee Related CN205315366U (en) | 2015-12-31 | 2015-12-31 | Prevent that engineering vehicle hydraulic drive system pressure from rising device suddenly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205315366U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107585021A (en) * | 2017-07-14 | 2018-01-16 | 董博 | Manual car ramp starting auxiliary device |
-
2015
- 2015-12-31 CN CN201521139627.1U patent/CN205315366U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107585021A (en) * | 2017-07-14 | 2018-01-16 | 董博 | Manual car ramp starting auxiliary device |
| CN107585021B (en) * | 2017-07-14 | 2024-02-20 | 董博 | Hill starting auxiliary device for manual gear automobile |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160615 Termination date: 20161231 |