Hydraulic system volume transmission
The invention relates to transport machinery and can be used in the transmission system of vehicles, mainly tracked vehicles. The hydraulic system includes a tank 2, monoblock the main hydraulic machines with the control unit 6, a back 7 and 8 safety valves, pump control 3, heat exchanger 13, the connecting line. The pump control valve 3 is made-slot with supply regulator 15, the tank 2 - stage cylinder 9 with differential piston 10. The cavity 11 with the smaller area piston 10 is connected to the input of the control unit 6 and the output of the pump unit 3. The cavity 12 of the piston 10 is connected with the inputs of the monoblock 1 basic hydraulic machines, pump control 3 and the output of the heat exchanger 13, an input connected to hull cavities monoblock 1 and pump control 3. The technical result - developed self-contained hydraulic system volume transmission, simplified design and improved reliability. 1 Il.
The invention relates to transport machinery and can be used in the transmission system of vehicles, mainly tracked vehicles.
Known hydraulic Simagin, a control unit, an auxiliary pump, filter, heat exchanger, connecting highways. Executed on a typical system configuration have several disadvantages: the design complexity, due to the separate installation of a number of motors [1, S. 71-72, Fig.41, S. 77, 46], powered by the same pump; additional power losses due to the use of schema driven several unregulated pumps [1, C. 82, Fig.52], overload of hydraulic machines [1, C. 66, Fig.36] due to the lack of safety valves.
The closest to the technical essence and the number of matching characteristics of the present invention is selected as a prototype system GOTH [2, Fig.1, 2]. In the known system, including tank (reservoir), adjustable hydraulic pump with the node (system) control and unregulated hydraulic motor, valves and safety, the auxiliary pump (feed), filter, heat exchanger (cooler), connecting line, the motor causes the rotation of the shaft of an adjustable pump and its associated auxiliary pump, the latter sucks the working fluid from a supply tank through the filter and performs compensation of leakage in the hydraulic machines and provides the required flow rate for the node is onalisa and its performance, leading to adequate change of the rotation frequency of the motor. The excess supply of the auxiliary pump through the relief valve is constantly directed into the body of the engine, where it connects with major leaks of hydraulic machines and passes through the heat exchanger in the tank performed in an unpressurized version and is connected with the environment.
In this system the auxiliary pump performs two functions - it serves as a pressure source for the control node, where the relatively small flow of the working fluid at high pressure and compensates for leakage of the working fluid in the main hydraulic machines that require a relatively high flow of the working fluid at low pressure. The combination reduced the range and to simplify the design of the system, but led to increased heat in the working fluid due to unproductive higher power to drive the auxiliary pump. Due to the constant contact of the working fluid with the environment and, as a consequence, pollution reduced reliability of GOTH.
The invention solves the problem of the development of the Autonomous system GOTH, a simplified construction, reduced in comparison with the prototype hydraulic volumetric transmission, includes tank, monoblock the main hydraulic machines with the control node, return and safety valves, pump control, heat exchanger, connecting highways, according to the invention, the pump control valve is a slit with a supply regulator, and tank is a stepped cylinder with a differential piston, a cavity with a smaller area of the piston is connected to the input of the control node and the output of the regulated pump control, and a second cavity with inputs monoblock the main hydraulic machines, pump control and output heat exchanger, the inlet of which is connected with the hull cavities monoblock and pump control.
The above distinguishing features of the claimed system GOTH are essential, as each of them necessary, and together they are sufficient to achieve the technical result in comparison with the prototype and known similar systems. Between the features and achievable technical result there is a causal link.
System implementation GOTH offline sealed variant prevents the working fluid from contamination from the outside, allows to exclude from the filter. Apollinare with differential piston, one cavity with the smaller area of the piston is connected to the output of the pump control, and a second cavity with an entrance monoblock the main hydraulic machines, allows to exclude from system pump recharge, while in the process of work necessary for the normal functioning of hydraulic machines the pressure of the working fluid at the entrance to the bar, and pump control. Use as a source of control pressure regulated pump with a fixed cylinder block and valve distribution provides a simple design and a significant reduction in power to the pump drive control by supplying his camera metered amount of fluid required by the conditions of control GOTH, which is impossible in a constructive profile of the pump feeding the prototype.
The claimed technical solution is new, because it is unknown in the prior art, involves an inventive step, since the proposed scheme the solution of the Autonomous system GOTH is not obvious from the prior art, industrially applicable, because it is intended for use in the transmission of a caterpillar.
Technical essence and principle of operation of the GOTH illustrated by the drawing.
ICI is, the knitted connecting highways. Monoblock 1 consists of a reversible adjustable hydraulic pump 4, unregulated motor 5, the control unit 6, a back 7 and 8 safety valves. Tank 2 is a stepped cylinder 9 with differential piston 10, the cavity 11 with the smaller area piston 10 is connected to the input of the control unit 6 and the output of the pump unit 3, and the second cavity 12 is communicated to the input of the monoblock 1, pump control 3 and the output of the heat exchanger 13, an input connected to hull cavities monoblock 1 and pump control 3. Pump control 3 is actually the pump part, made in the form of valve-slotted pump 14, and the supply regulator 15.
System GOTH works as follows.
The motor causes the rotation of the shafts reversible adjustable hydraulic pump 4 and the pump control 3. Valve-gap pump 14 sucks through the supply regulator 15 working fluid from the tank 2 and takes the pressure at the input to the control node 6 and into the cavity 11 of the cylinder 9, causing proportional to the ratio of the areas of the differential piston 10, the pressure increase in the cavity 12. Due to this basic hydraulic machines 4 and 5 are under excessive pressure at the entrance of theme GOTH.
Stepless adjustment of frequency of rotation of the shaft of the motor 5 is carried out by changing the working volume and performance of the hydraulic pump 4 under the action of pressure fluid control unit 6 when applying for his management team. The pressure in the tandem pump-hydraulic motor is determined by the resistance movement of transport vehicles, to protect the system GOTH overload in 1 monoblock integrated pressure relief valve 8. Switching the direction of feed main hydraulic machines when reversing adjustable hydraulic pump is controlled automatically by means of check valves 7.
When working GOTH at steady state pump control 3 provides the minimum required submission and the required level of excess pressure at the inlet of the hydraulic machines 4 and 5, increasing its almost only transient acceleration or deceleration of the motor 5, which can further reduce the cost of power to drive the pump unit 3 and the heat in the working fluid.
The use of the invention in the composition GOTH or hydrostatic mechanical transmission (GMT) capable of improving controllability of translational and rotational movements of the transport of the machine, allows dcost.
Stand-alone system designed for GOUT mobile tracked vehicle made on the basis of the axial piston transmission displacement of hydraulic machines 280 cm3.
1. Komisarek C. F., Ivanovo N. A. Hydraulic volumetric transmission. - M.: State scientific and technical publishing house of the engineering literature, 1963. - 156 S.
2. Kirovograd plant of tractor units. Volumetric hydraulic drive. Technical description and operating instructions GTS 90-00.000. Developer - Hydrosila. Ukraine, 25006, , Kirovograd, Bratislava street, 5.
Hydraulic system volume transmission, including tank, monoblock the main hydraulic machines with the control node, return and safety valves, pump control, heat exchanger, connecting line, wherein the pump control valve is a slit with a supply regulator, and tank is a stepped cylinder with a differential piston, a cavity which is smaller piston is connected to the input of the control node and the output of the regulated pump control, and a second cavity with inputs monoblock the main guide bar, and pump control.