Bulk transport vehicle hydraulic transmission
(57) Abstract:Usage: in General engineering is applied to small-sized tractors and other transport vehicles to drive propulsion. The inventive source of recharge volume hydraulic transmission uses a hydraulic accumulator, with the working cavity which is communicated to the outlet of the drain hose to the pump and the hydraulic motor and the input of hydroline recharge. Hydraulic accumulator contains a spring-loaded piston associated with the control handle charging, the working volume of the hydraulic accumulator communicated with hydroline recharge through check valve in series with which the filter is installed parallel to the free output. The output of the drain hose is in communication with the working space of the hydraulic accumulator through a hole in the piston, and the entrance of hydroline recharge communicated with the working cavity of the hydraulic accumulator through a hole in its bottom. 2 C.p. f-crystals, 1 Il. The invention relates to mechanical engineering and is intended for use on compact tractors and other transport vehicles to drive propulsion.Known volumetric hydraulic transmission vehicles (prototype) having a power circuit with her fluids  cooling system, purification and recharge uses an auxiliary pump, Sipper working fluid through the filter and then into the management system displacement of the pump and through the check valves in hydroline low pressure power path, creating the necessary pressure feed from the hydraulic machines (usually in the range of 0.4 to 1.5 MPa). Excess fluid flow auxiliary pump is not spent on the management and compensation of leakage through a special valve goes into the body of the hydraulic transmission, then, mingling with leaks, flows into the cooling radiator and the reservoir, where again climbs auxiliary pump.Auxiliary pump degrades the energy characteristics of the drive due to power loss on the transfer liquid and on the throttle the excess water in the tank.The invention aims to improve energy performance volume hydraulic transmission.This is achieved by the fact that as a source of recharge used hydraulic accumulator, with the working cavity which is communicated to the outlet of the drain hose and the inlet of hydroline recharge.In addition, the accumulator contains a spring-loaded piston associated with rumely check valve, consistently with which the filter is installed parallel to the free output.In addition, the output of the drain hose is in communication with the working space of the hydraulic accumulator through a hole in the piston, and the entrance of hydroline recharge communicated with the working cavity of hydroaccumulator through the hole in its bottom.The specified technical solution can be implemented in connection with the fact that the number of vehicles (in particular, small-sized agricultural tractors) are required to solve the problem of cooling volume hydraulic transmission with auxiliary pump recharge. It is defined as a relatively low intensity modes of loading of the hydraulic transmission, and cooling of hydraulic machines by direct blowing ambient air. These circumstances allow us to abandon the intensive mass transfer between the cavities of the hydraulic transmission and hydraulic tank, limiting the system recharge only compensation internal leakage of the pump and the hydraulic motor. In addition, note that for small tractors used pumps small working volume, not using servo-hydraulic mechanisms change the feed rate and does not require the mA volume hydraulic transmission.Volumetric hydraulic transmission includes a pump 1 and the hydraulic motor 2, the message of the power hose 3 and 4. In the power hydroline included safety valves 5 and 6. Volumetric hydraulic transmission has hydroline 7 recharge, the output of which is connected with a power hose 3 and 4 through the check valves 8 and 9, and the entrance is in communication with the working space of the hydraulic accumulator 10 through the hole in her bottom. In the hydroline 7 recharge consistently, there are additional non-return valve 11 and the filter 12. In parallel with additional non-return valve 11 has an open port 13 with a check valve 14. The output of the drain hose 15 of the pump 1 and the hydraulic motor 2 flexible sleeve 16 is in communication with the bore 17 in the spring loaded piston 18 of the hydraulic accumulator. The piston 18 is connected with the arm 19 of the charging of the hydraulic accumulator.Volumetric hydraulic transmission works as follows.Open port 13 through the check valve 14 is a fuel hose (not shown) is connected to the vessel with the working fluid. By pulling the handle 19 of the piston 18, compressing the spring, means in the upper position (the handle 19 occupies the position indicated by the dotted line). The fluid sucked from the tank fills the working cavity hydroaccumulators flow through the filter 12. After disconnecting the refueling hose turns on pump 1 and is the drive of the hydraulic motor 2 through the power hydroline 3 and 4. In the event of an overload relief valves 5 and 6 perform the bypass fluid from the high pressure power hydroline in low-pressure.Internal leakage of hydraulic machines via drain hose 15 and the flexible sleeve 16 are received in the hole 17 of the piston 18 and later in the upper part of the working cavity of the accumulator 10. From the lower part of the working cavity of the accumulator 10, the working fluid in the hydroline 7 recharge through the filter 12 under the pressure created by the spring accumulator flows through the check valves 8 or 9 in the corresponding power (low-pressure) hydroline.Supply of the working fluid in the upper zone of the working cavity of the hydraulic accumulator, and transport it from the bottom area allows you to provide the mass transfer in the accumulator and further use of heat transfer for cooling of the hydraulic transmission.The frequency of charging of the hydraulic accumulator is determined by the ratio of its working volume and value of the external leakage of the hydraulic transmission. Given the insignificance of the latter in proper hydraulic transmission, to meet the requirement of the ora.From the above it follows that this volume hydraulic transmission allows you to minimize the power losses in the system recharge, to provide the necessary pressure feeding and cleaning of the working fluid and, in addition, allows to mechanize the charging of the hydraulic transmission fluid without the use of special filling devices. 1. Volumetric hydraulic transmission transport machines, mainly small-sized tractor, containing the pump and the hydraulic motor drive propulsion, drainage hydroline, power hydroline and communicated with them through the check valves of hydroline recharge, characterized in that the source of recharge is a hydraulic accumulator, with the working cavity which is communicated to the outlet of the drain hose and the inlet of hydroline recharge.2. Hydraulic transmission under item 1, wherein the accumulator comprises a spring-loaded piston associated with the control handle charging, the working volume of the hydraulic accumulator communicated with hydroline recharge through check valve in series with which the filter is installed and parallel to the free output.3. Hydraulic transmission for PP. 1 and 2, characterized in that the connection of the drain hose with Raben with the working cavity of the hydraulic accumulator through a hole in its bottom.
FIELD: transport engineering; self-propelled wheeled vehicles.
SUBSTANCE: proposed vehicle contains frame 1 with cab 9, front and rear steerable wheels 4, 6 and middle wheels 5, engine placed behind the cab along vehicle and covered by hood 11. hydrostatic transmission contains pumping station 21 consisting of matching reduction gear driven by engine placed behind the cab, and three pumps connected by pipelines with hydraulic motors providing separate drives of wheels. Hydraulic motors are arranged along frame 1 between sidemembers on solid brackets made in form of boxes with flanges connected with wall of side member between its webs. Invention makes it possible to create ecologically clean and reliable multipurpose all-wheel-drive vehicle of high cross-country capacity with hydrostatic transmission to drive all wheels.
EFFECT: provision of convenient mounting and servicing of transmission units.
5 cl, 7 dwg
FIELD: transport engineering.
SUBSTANCE: invention relates to crawler tractors and it can be used in their full-flow hydrostatic transmissions. Said transmission contains dividing reduction unit 2, two parallel final hydrostatic drives with pumps 3, 4 and hydraulic motors 5, 6, track reduction units 17, 18 and two planetary mechanisms. Planetary mechanisms are installed between hydraulic motors 17, 18 and track reduction units 17, 18. Sun gears 9, 10 of planetary mechanisms are connected with each hydraulic motor by two similar gear trains 7, 9. Carriers 11, 12 of each planetary mechanism are connected with epicyclic wheels 14, 13 of other planetary mechanism and with track reduction units 17, 18. invention improves maneuverability of tractor, provides economic recuperation of brake power from trailing side to leading side at turning of tractor, reduced power load on engine at turning, reduced power losses in hydrostatic drives of transmission of tractor with possibility of use of hydrostatic drives of lower installed power.
EFFECT: improved service characteristics of tractor.
FIELD: transport engineering; automobiles with positive displacement hydraulic drive.
SUBSTANCE: proposed transmission includes constant-capacity guided-vane hydraulic pump mechanically connected with vehicle engine communicating through pressure, drain and suction hydraulic lines through hydraulic distributor enclosing pressure and drain hydraulic lines and playing the part of reversor with at least one constant-capacity reversible guide-vane hydraulic motor to transmit torque to one or two driving wheels of automobile. Spaces of suction and drain hydraulic lines communicate with space of hydraulic tank. Suction hydraulic line passes through adjustable hydraulic restrictor whose control lever is mechanically coupled with automobile accelerator pedal.
EFFECT: simplified design of transmission, reduced fuel consumption and weight of transmission and its cost, and increased efficiency of automobile.
18 cl, 5 dwg
FIELD: mechanical engineering; machine building hydraulics.
SUBSTANCE: invention can be used on vehicles and machine-and-tractor units operating under unsteady conditions of movement. Proposed device contains planetary train 1, reactive link 3 connected with drive gear of oil pump 5. Planetary train is connected through carrier shaft with gearbox 9 and is set into operation by engine 11. Two-step adjustable restrictor 12 is installed in pressure main line of pump. Safety valve 14 and control cock 15 are connected to input of adjustable restrictor, being also installed in pressure main line of pump pneumohydraulic accumulator, being end member of pressure main line, is provided with three spaces. It consists of hydraulic cylinder, free piston, piston with rod, piston position regulator, oil line and oil channel. Space between pistons is filled with oil which regulates volume.
EFFECT: reduced influence of vibrations of external traction load onto functioning of machine-and-tractor unit.
FIELD: transport engineering; hydrostatic transmissions.
SUBSTANCE: proposed hydrostatic transmission contains pumping unit consisting of main and makeup pumps driven by vehicle engine, hydraulic motors connected by main hydraulic lines with pumping unit and forming circulating hydraulic circuit, and electrically driven self-contained pump whose delivery space is connected with hydraulic circuit formed by main hydraulic lines. Hydrostatic transmission is furnished additionally with sealed hydraulic tank with device for charging its air space with compressed air from vehicle pneumatic system and containing shutoff cock, compressed air pressure regulator in sealed hydraulic tank with safety valve and vacuum manual control valve to discharge compressed air from sealed hydraulic tank, two-position manual control valve for alternate hydraulic coupling of suction space of self-contained electrically-driven pump with hydraulic tank and with device for charging the tank with working liquid, check valve arranged in drain hydraulic line at inlet of sealed hydraulic tank, and manually controlled shutoff valve in suction hydraulic line at outlet of sealed hydraulic tank.
EFFECT: improved reliability of hydrostatic transmission of vehicle designed for operation under various road conditions.
5 cl, 1 dwg
FIELD: mechanical engineering.
SUBSTANCE: invention can be used in different vehicles and in devices and mechanisms for clashless engagement of driven shafts. Proposed torque converter contains drive and driven units of converter. Drive unit is made in form of disks 2-5 with slots freely fitted on splined shaft 1. Movable blades are fitted in said slots. Driven unit of converter is made in form of cylindrical housing 7 with driven shaft 16 and rings 11 and 12 fitted on shaft. Disks 2-5 with blades 6 of drive unit of converter are arranged inside rings. Slots in disks 2-5 of drive unit of converter are made through being arranged tangentially. Each of rings 11, 12 in cylindrical housing 7 of converter driven unit is installed for rolling on guide 13, being connected with axle-shaft 14 flush-fitted in cradle of step bearing 15 whose body is in rigid engagement with cylindrical housing 7. With drive unit rotating, summary driven torque is formed from its hydraulic and inertia components. Formulas for calculating the torque are given in description of invention.
EFFECT: improved efficiency of hydraulic - inertia converter, its control system, gearbox of converter and method of torque conversion.
24 cl, 1 tbl, 10 dwg
FIELD: mechanical engineering; vehicle hydraulic drives.
SUBSTANCE: proposed recuperative reversible stepless hydraulic transmission of wheeled vehicle contains drive engine 5, recuperator 20 with overrunning clutch 24, controllable reversible hydraulic machine 18 with pressure and suction and control plunger 8 communicating with hydraulic control system through pipelines, follow-up hydraulic booster with variable-capacity pump 12 of reverse capacity, four non-controllable hydraulic machines 29-32. Each of said hydraulic machines has vehicle wheel, and wheels of vehicle are in contact with road pavement. Recuperator 20 is made in form of planetary reduction gear whose carrier 19 is connected with pump 12 and with hydraulic machine 18 provided with two diametric pressure and two diametric suction spaces and connected with hydraulic machines 29-32 by pipelines. Hydraulic machine 18 contains "floating" plunger 33 with two cylindrical grooves between two end face spaces and "polar" plunger by channels of which end face spaces of floating plunger 33 are communicated, overlapped or reversed with pressure and suction spaces of hydraulic machine 18. Cylindrical grooves of floating plunger 33 synchronously overlap or hydraulically communicate two pressure and two suction spaces of hydraulic machine 18. Lever 6 of polar plunger is mechanically connected with corresponding slot of plate 3 of vehicle speed and reverse control member.
EFFECT: reduced number of control members, dispensing with brake system improved cross-country capacity of vehicle, reduced fuel consumption, reduced acceleration time, increased efficiency.
5 cl, 11 dwg
FIELD: public building structures, particularly drives for showcase rotation.
SUBSTANCE: drive to rotate showcase substantially formed as superimposed disc 4 installed on pin 5 provides force transmission from drive 12 to disc 4 by means of flexible tie having tensioning means. Flexible tie is formed as closed loop of chain 10 having rigid links. The chain passes around the disc 4 along disc surface generator. Drive has sprocket 11 of driving means. The sprocket 11 is installed on shaft of hydraulic drive 12. Hydraulic drive 12 is mounted on plate 13 moving in radial direction relative disc 4 by hydraulic power cylinder 16.
EFFECT: increased safety of the drive, improved disc position adjustment, reduced size, simplified mounting and enhanced maintainability.
7 cl, 2 dwg
FIELD: transport mechanical engineering.
SUBSTANCE: device comprises electric means for measuring working volume of pumps and hydraulic motors and pickup (60) for measuring the speed of rotation of the shaft of the pump station. The electric circuits are provided with threshold control members (67) and (80) interconnected between pickup (6) and the electric means. Between threshold control members (67) and (80) and electric means for changing working volume of pumps (67) and (80) and hydraulic motors (13), (14), (17), and (18) of the drive of end wheels are variable resistors (77), (78), (86), and (87) that are controlled by pickups (89) and (89) of pressure difference in hydraulic circuits of the drive of the intermediate wheels and the drive of each pair of end wheels.
EFFECT: enhanced reliability and prolonged service life.
3 cl, 4 dwg
FIELD: mechanical engineering; production of drive units for engineering tools and motor vehicles.
SUBSTANCE: the invention is pertaining to the field of mechanical engineering and may be used in production of drive units for engineering tools and motor vehicles. The self-regulating infinitely variable speed transmission contains: an input shaft 9 and an output shaft 6, a centrifugal type nonadjustable hydraulic pump 3, a gear differential unit 2 with two output shafts 5, 6 and a nonadjustable hydraulic motor 4. The hydraulic pump 3 is connected to the gear differential unit output shaft 5. The nonadjustable hydraulic motor 4 is connected to the gear differential unit output shaft 6, which is an output shaft of the gear differential unit output shaft. Self-regulation of a torque of the output shaft is depending on a load by changing the number of revolutions per a minute of the centrifugal pump using the differential gear of the he self-regulating infinitely variable speed transmission. The technical result is an increased affordability due to reduction of a quantity of gears and lack of the throttling losses of a liquid and to the complete self-regulation.
EFFECT: the invention ensures an increased affordability due to reduction of a quantity of gears and lack of the throttling losses of a liquid and to the complete self-regulation.