CN202301241U - Synchronous control device for engine rotating speed and main pump delivery of hydraulic traveling machine - Google Patents
Synchronous control device for engine rotating speed and main pump delivery of hydraulic traveling machine Download PDFInfo
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- CN202301241U CN202301241U CN2011204308225U CN201120430822U CN202301241U CN 202301241 U CN202301241 U CN 202301241U CN 2011204308225 U CN2011204308225 U CN 2011204308225U CN 201120430822 U CN201120430822 U CN 201120430822U CN 202301241 U CN202301241 U CN 202301241U
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- proportional pressure
- reducing valve
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Abstract
The utility model discloses a synchronous control device for engine rotating speed and main pump delivery of a hydraulic traveling machine, and the synchronous control device belongs to mine and engineering machinery and includes a proportional pressure reducing valve, a main pump servo valve and a throttle control cylinder, wherein a valve block is mounted between the proportional pressure reducing valve and the main pump servo valve; and a shuttle valve and two orifice plugs are embedded in the valve block; and the two ends of the shuttle valve are connected with the output ports A and B of the proportional pressure reducing valve. The output pressure signal of the proportional pressure reducing valve controls the servo valve of the variable pump through the orifice plug holes on one hand, and meanwhile the left or the right output pressure signal of the proportional pressure reducing valve is output from the output port of the shuttle valve to the throttle control cylinder, so as to control the cylinder stroke and then control the throttle of the engine. The utility model has the advantages that during the advancing, backing or speed changing process, as long as the pump variable delivery handle is operated and the pump variable is simultaneously controlled, the rotating speed of the engine is automatically controlled so as to be matched with the demand of the pump power, and the shutdown of the engine caused by the mismatching of the pump delivery and the engine throttle at the starting of the engine is avoided.
Description
Technical field
The utility model belongs to mine equipment and engineering machinery field, specifically is a kind of hydraulic moving mechanical engine rotating speed and main pump discharge capacity sync control device, mainly is applicable to the control of mining hydraulic pressure monorail crane locomotive and engineering machinery engine.
Background technique
What mining hydraulic pressure monorail crane locomotive driving often adopted is the control that the closed system oil pump drives the oil hydraulic motor of low-speed big, the speed that it goes and advance, fall back or stop to depend on the variation of main oil pump discharge capacity and the conversion of flow output inlet opening.The rotating speed of motor is constant basically, needs the size of artificial adjusting throttle when changing engine speed, can't realize the The synchronized Coordinative Control of engine speed and variable displacercent pump.
Summary of the invention
The utility model provides a kind of hydraulic moving mechanical engine rotating speed and main pump discharge capacity sync control device, can be according to the variation of main pump discharge capacity, and the size of synchronization control engine throttle changes engine speed, to satisfy the demand of variable displacement pump to hydraulic oil at any time.
The utility model is realized with following technological scheme: a kind of hydraulic moving mechanical engine rotating speed and main pump discharge capacity sync control device; Comprise proportional pressure-reducing valve and main pump servovalve; The Throttle Opening Control cylinder is equipped with the plate valve piece between proportional pressure-reducing valve and main pump servovalve.The plate valve piece has four hydraulic fluid ports, and in the valve piece, embedding has shuttle valve and two orifice plugs, before two orifice plugs are connected to the outlet A1, B1 of valve piece; The shuttle valve two ends be connected respectively between two oil-feed A of valve piece, the B will from the left side or be defeated by the Throttle Opening Control cylinder, control oil cylinder stroke control engine throttle from the pressure signal of the Proportional valve output on the right from the delivery outlet P2 of shuttle valve.
The beneficial effect of the utility model is: the operation locomotive advances, falls back or be just passable as long as operating pumps becomes the Joystick of discharge capacity during speed change, and the rotating speed of motor can obtain adjustment automatically, according to the rotating speed of variable pump delivery demand adjustment motor.Not only reduced programmed sequence of operations but also save meaningless fuel consumption; Main is has avoided causing when pump displacement and engine throttle are unmatched when locomotive just starts that motor suppresses flame-out phenomenon.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is further described.
Fig. 1 is the utility model hydraulic control schematic diagram;
Fig. 2 is a plate valve block structure schematic representation;
Fig. 3 is that the E of Fig. 2 is to view.
Among the figure: 1, proportional pressure-reducing valve, 2, main pump variable servovalve, 3, the variable piston, 4, the plate valve piece, 5, shuttle valve, 6, orifice plug, 7, the Throttle Opening Control cylinder, 71, pressure spring, 8, main pump.
Embodiment
As shown in Figure 1, main pump 8 is dynamical elements of the driving locomotive in the system, and it has two external control mouth y1, y2, and this control mouth is the control mouth of the variable servovalve 2 of main pump; Proportional pressure-reducing valve 1 is the standard hydraulic element, adopts the explosion-proof ratio decompression (DHRZA/M-A-012) of Italian import, and it has 4 hydraulic fluid ports of P T A B, and the P mouth of proportional pressure-reducing valve 1 connects the pilot pressure filler opening, oil return inlet T mouth connected tank; A B mouth is the delivery outlet of proportional pressure-reducing valve, reaction input electrical signal size, and the control mouth y1, the y2 that are connected respectively to main pump variable servovalve 2 are last, and the variation of y1 y2 makes this valve output pressure difference signal control pump variable piston 3, realizes the Variable Control of pump; Proportional pressure-reducing valve connected with being connected through plate valve piece 4 of main pump, and valve piece 4 is to be made up of valve 5 (standard piece shuttle valve, inserting element) and two orifice plugs 6 (inserting element).The effect of orifice plug 6 is to make y1, y2 signal obtain buffering to reduce impact.The effect of shuttle valve 5 be from the left side or all will be from the pressure signal on the right from the delivery outlet P2 output of shuttle valve 5; The pressure signal of its output is connected to Throttle Opening Control cylinder 7; Throttle Opening Control cylinder 7 is special servo-cylinders, and spring 71 is arranged in the oil cylinder loculus, is used for being equilibrated at a certain position according to the big young pathbreaker's piston of pressure; The mobile can regulate DENG throttle size of cylinder bar changes engine speed like this.So system's engine throttle when obtaining the pump variable signal has also changed, and makes engine speed change, realized that the rotating speed of motor and pump displacement change with ratio under the control of input signal.
Proportional pressure-reducing valve is connected as shown in Figures 2 and 3 with the concrete of main pump oil circuit, and plate valve piece 4 end faces have 4 hydraulic fluid port A B P T corresponding with 4 mouths on the proportional pressure-reducing valve; Two outlets in bottom surface A1 B1 communicates with A B inside respectively, and with A1, B1 links on the pump y1 y2, and bi-side outlet P T communicates with end face P T mouth respectively; Before two orifice plugs 6 are connected to the outlet A1 B1 of valve piece; Shuttle valve 5 is connected between the valve piece filler opening A.B, and the delivery outlet P2 of shuttle valve 5 opens the right flank at the valve piece, shuttle valve 5 will from the left side or be defeated by Throttle Opening Control cylinder 7 control oil cylinder strokes control engine throttles from the pressure signal of the Proportional valve on the right output through the P2 mouth.
The system works principle is: the output signal of proportional pressure-reducing valve 1 gets into main pump variable servovalve 2 control mouthful y1 and y2 through valve piece A B passage; The pilot pressure fuel feeding gets into proportional pressure-reducing valve 1 filler opening through valve piece 4 oil inlet P; After electric ratio handle provides Y1 or Y2 electrical signal; Proportional pressure-reducing valve 1 will produce corresponding pressure signal y1 or y2 according to the electrical signal size; It is servo 2 that this signal pressure promotes main pump variable, and servovalve 2 will export the discharge capacity or the direction of changing main pumps for main pump variable piston 3 through the pressure signal that amplifies, the variation of realization drawing motor change in rotational speed and direction.Owing on the plate valve piece 4 between proportional pressure-reducing valve 1 and the main pump servovalve 2, embed shuttle valve 5; The result has obtained the delivery pressure signal of proportional pressure-reducing valve at shuttle valve delivery outlet P2; The stroke of this SC sigmal control DENG Throttle Opening Control cylinder 7; Thereby controlled the engine throttle size, controlled engine speed, made the rotating speed of motor and pump displacement under the control of input signal, change with ratio.
Claims (3)
1. hydraulic moving mechanical engine rotating speed and main pump discharge capacity sync control device; Comprise proportional pressure-reducing valve (1) and main pump servovalve (2); Throttle Opening Control cylinder (7) is characterized in that, plate valve piece (4) is installed between proportional pressure-reducing valve (1) and main pump servovalve (2); Plate valve piece (4) has 4 hydraulic fluid ports, and in plate valve piece (4), embedding has shuttle valve (5) and two orifice plugs (6); Before two orifice plugs are connected to the outlet A1, B1 of plate valve piece; The delivery outlet that the shuttle valve two ends are connected respectively to proportional pressure-reducing valve (1) is between the inlet opening A and B of plate valve piece; Shuttle valve (5) will from left end or be defeated by Throttle Opening Control cylinder (7) from the pressure signal of the proportional pressure-reducing valve of right-hand member output from the delivery outlet P2 of shuttle valve, control Throttle Opening Control cylinder stroke is with the control engine throttle.
2. a kind of hydraulic moving mechanical engine rotating speed according to claim 1 and main pump discharge capacity sync control device; It is characterized in that, the stage clip (71) that is used for being equilibrated at according to the big young pathbreaker's piston of pressure a certain position is housed in the loculus of described Throttle Opening Control cylinder (7).
3. a kind of hydraulic moving mechanical engine rotating speed according to claim 1 and main pump discharge capacity sync control device; It is characterized in that; Described proportional pressure-reducing valve (1) has P, T, A, four hydraulic fluid ports of B; 4 hydraulic fluid ports with plate valve piece (4) are corresponding respectively, and the P mouth of proportional pressure-reducing valve (1) connects the pilot pressure filler opening, oil return inlet T mouth connected tank; The delivery pressure mouth A of proportional pressure-reducing valve (1), B pass through the both sides of shuttle valve (5) and control mouth y1, the y2 of throttling consent (6) to main pump variable servovalve (2) respectively; The variation of y1, y2 makes this valve output pressure difference signal controlled variable piston (3), realizes the Variable Control of pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204308225U CN202301241U (en) | 2011-11-03 | 2011-11-03 | Synchronous control device for engine rotating speed and main pump delivery of hydraulic traveling machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204308225U CN202301241U (en) | 2011-11-03 | 2011-11-03 | Synchronous control device for engine rotating speed and main pump delivery of hydraulic traveling machine |
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| Publication Number | Publication Date |
|---|---|
| CN202301241U true CN202301241U (en) | 2012-07-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204308225U Expired - Lifetime CN202301241U (en) | 2011-11-03 | 2011-11-03 | Synchronous control device for engine rotating speed and main pump delivery of hydraulic traveling machine |
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| Country | Link |
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| CN (1) | CN202301241U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102410267A (en) * | 2011-11-03 | 2012-04-11 | 徐州雷曼机械科技有限公司 | Synchronous control device of revolving speed of hydraulic walking mechanism engine and discharge of main pump |
| CN103057494A (en) * | 2013-01-15 | 2013-04-24 | 阿特拉斯科普柯(南京)建筑矿山设备有限公司 | Closed hydraulic system and engineering mechanical chassis with same |
| CN103062142A (en) * | 2012-12-28 | 2013-04-24 | 三一重工股份有限公司 | Pipe reeling device hydraulic system and piling machine |
| CN103511369A (en) * | 2013-09-11 | 2014-01-15 | 中航力源液压股份有限公司 | Multi-gear power control variable piston pump |
-
2011
- 2011-11-03 CN CN2011204308225U patent/CN202301241U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102410267A (en) * | 2011-11-03 | 2012-04-11 | 徐州雷曼机械科技有限公司 | Synchronous control device of revolving speed of hydraulic walking mechanism engine and discharge of main pump |
| CN103062142A (en) * | 2012-12-28 | 2013-04-24 | 三一重工股份有限公司 | Pipe reeling device hydraulic system and piling machine |
| CN103062142B (en) * | 2012-12-28 | 2015-12-23 | 三一重工股份有限公司 | Tube rolling device hydraulic system and piling machinery |
| CN103057494A (en) * | 2013-01-15 | 2013-04-24 | 阿特拉斯科普柯(南京)建筑矿山设备有限公司 | Closed hydraulic system and engineering mechanical chassis with same |
| CN103057494B (en) * | 2013-01-15 | 2015-07-29 | 阿特拉斯科普柯(南京)建筑矿山设备有限公司 | Closed fhdraulic system and comprise the engineering machinery chassis of this system |
| CN103511369A (en) * | 2013-09-11 | 2014-01-15 | 中航力源液压股份有限公司 | Multi-gear power control variable piston pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120704 |
|
| CX01 | Expiry of patent term |