阅读说明：本技术 一种用变速齿轮泵组成变速器的方法 (Method for forming speed changer by using variable-speed gear pump ) 是由 张小昌 于 2020-03-12 设计创作，主要内容包括：该设计属汽车领域。用变速齿轮泵变组成变速器的方法实际上是把齿轮变速器中的变速齿轮副通过改变齿轮模数引进到齿轮泵中作为齿轮泵的压油齿轮副,然后用油压驱动齿轮副,实现变速功能的一种方法。由于变速压油齿轮副有省力功能,它省掉同步器的同时又实现了液体无极变速。由于单个变速齿轮泵也有变速功能,所以汽车无论起步还是正常行驶都可以只用一个从动泵工作,变速齿轮泵组就相当于齿轮变速器总成,省了同步器与拨挡机构,各个变速齿轮泵的变速比不一样,所以一个从动泵就是一个挡位。由于主动泵流量远大于任意一个从动泵,所以传动油压力会一直保持中高压,压力越高传动效率就越高。(The design belongs to the field of automobiles. The method for changing gear pump into speed variator is a method which can change the speed of speed variator by changing the gear module of speed variator, introducing it into gear pump to act as the oil-pressing gear pair of gear pump, and using oil pressure to drive gear pair. Because the speed-changing oil-pressing gear pair has a labor-saving function, the stepless speed change of the liquid is realized while a synchronizer is omitted. Because a single variable gear pump also has a variable speed function, the automobile can work by only one driven pump no matter starting or normal running, the variable gear pump group is equivalent to a gear transmission assembly, a synchronizer and a shifting mechanism are saved, the variable gear ratio of each variable gear pump is different, and one driven pump is a gear. Because the flow of the active pump is far larger than that of any driven pump, the transmission oil pressure can be kept at a middle-high pressure all the time, and the higher the pressure is, the higher the transmission efficiency is.)

1. A method for forming speed variator by speed-varying gear pump features that the speed-varying gear pair in speed variator is introduced to gear pump by changing gear module to serve as the oil-pressing gear pair of gear pump, which is then driven by oil pressure to realize speed-varying function. It saves the synchronizer and realizes the stepless speed change of the liquid. The gear pump converts the kinetic energy of the flywheel into the mechanical energy of liquid, thereby facilitating the energy control and greatly improving the transmission efficiency (compared with a hydraulic torque converter). It is technically characterized in that; the oil transmission system is composed of a driving gear pump, a variable-speed gear pump, a proportional pressure regulating valve, an oil tank, an energy accumulator, a reversing valve, an oil pipe, an oil inlet circulating valve, an idling valve and some control mechanisms. Referring to fig. 1, an active gear pump (2) is characterized in that an oil inlet is connected with an oil tank (1) through a low-pressure oil pipe, an oil outlet divides an oil path through a three-way pipe, one path is connected with an oil inlet of an idle valve through a high-pressure oil pipe, the other path is connected with an oil inlet of an energy accumulator (4) through a high-pressure oil pipe, and an oil outlet of the idle valve is connected with the oil tank through a low-pressure oil pipe. The oil way of the oil outlet of the energy accumulator is divided, one way is connected with a clutch valve (3) oil inlet by a high-pressure oil pipe, the other way is connected with a proportional pressure regulating valve (5) oil inlet by a high-pressure oil pipe, and the oil outlet of the clutch valve is connected with an oil tank by a common oil pipe. The oil outlet of the proportional pressure regulating valve is connected with a reversing valve (6) through a high-pressure oil pipe, the oil outlet of the reversing valve is connected with an oil outlet of the proportional pressure regulating valve (12) through a high-pressure oil pipe, the oil outlet of the oil outlet proportional pressure regulating valve is connected with an oil inlet tank (1) through a common oil pipe, 4 reversing ports ABCD of the reversing valve are connected with a driven gear pump (8) through a combined oil pipe (11), the combined oil pipe is a high-pressure oil pipe, an oil inlet circulating valve (7) is installed on an oil inlet pipe of each driven variable-speed gear pump, and the oil inlet and outlet pipes of the variable-speed gear pumps are connected through a circulating oil pipe (14). 4 driven pumps in the example of fig. 1. According to the method, the oil supply amount of the driven gear pump set can be changed by adjusting the opening and closing degrees of the clutch valve (3) and the oil inlet circulating valve (7) so as to change the speed of the driven pump, and the pressure receiving area of the driven pump set can also be changed by closing the number of the oil inlet circulating valves (7) so as to change the output speed. The design of the circulating valve aims to enable a variable-speed gear pump, namely a driven gear pump, to idle and reduce resistance. The former method has a large output torque and a small output speed, and the latter method has a small output torque and a high output speed. This is the liquid shift. Because a single variable gear pump also has a variable speed function, the automobile can work by only one driven pump no matter starting or normal running, and the variable gear pump set at the moment is equivalent to a gear transmission assembly, so that a synchronizer and a shifting mechanism are saved. Since the gear ratio of each variable gear pump is different, one driven pump is a gear. Therefore, in actual use, the driving gear pump only needs to drive one of the variable-speed gear pumps, and the flow of the driving pump is far larger than that of any driven pump, so that the transmission oil pressure can be kept at medium and high pressure all the time, the higher the pressure is, the higher the transmission efficiency is, and the more oil is saved. Thereby achieving the purpose of designing the method. When one driven pump is driven, the other driven pumps are in an idling state because the circulation port of the circulation valve is opened, so that the connecting shaft does not generate resistance.

2. The driven gear pump is a gear pump which can change speed. The technical characteristics are as follows: the oil-pressing gear pair is obtained by changing some modules of a speed-changing gear pair in a gear transmission, and the gear pair is large and small in appearance (refer to fig. 3 and fig. 12).

The technical field; hydraulic transmission field of automobile

Background art; the gear speed variator for automobile has two driving shafts, one pair of gears, one synchronizer attached to the gears and one complicated control mechanism. Stepless speed change cannot be achieved, so that energy of each step cannot be fully utilized. Meanwhile, due to the fact that an operating mechanism is complex and the structural strength of the synchronizer is low, the transmission is prone to being damaged due to faults, and gear disorder, gear failure or clamping are caused. In summary, a gear transmission is very painful once destroyed because it is difficult and costly to maintain. Although the belt or steel belt transmission can realize stepless speed change, the belt or steel belt transmission is easy to break and has low load, and the belt or steel belt transmission can only be used for trolleys. The transmission efficiency of the hydraulic torque converter is too low, and the transmission efficiency of a new vehicle is not more than 60%.

The invention is provided; in view of the above disadvantages of various transmissions, i have devised a method of assembling a transmission with a variable gear pump. The technical principle is as follows; the gear pump can be pressed to rotate when receiving transmission oil, and power is output. It is well known that gear pumps can output transmission oil, and conversely, how can transmission oil flow into the gear pump? Experiments prove that when transmission oil flows into the gear pump, the transmission oil can be pressed to rotate and output power. Therefore, the variable-speed gear pump is designed, the variable-speed gear pump receives the energy of transmission oil from the driving gear pump through the energy accumulator, the proportional pressure regulating valve and the reversing valve, and the variable-speed gear pump rotates after receiving the transmission oil and outputs power. Thus, an oil transmission system is composed of a driving gear pump, a variable gear pump, a reversing valve, an energy accumulator, a proportional pressure regulating valve, an oil tank, an oil inlet circulating valve and the like, and is shown in a figure 1. The method of forming speed variator with speed-changing gear pump is a method of changing the gear modulus of speed-changing gear pair in gear speed variator, introducing the speed-changing gear pair into gear pump as the oil-pressing gear pair of gear pump, and driving the gear pair with oil pressure to realize speed-changing function. The variable-speed gear pump has the great characteristic that the starting oil pressure is low, the variable-speed gear pump does not need to rotate under the condition of high oil inlet pressure like a common gear pump, and the pressure of liquid certainly permeates to the weakest stressed position due to the labor-saving function of the pressure oil gear pair, so that the variable-speed gear pump can start to rotate under the condition of small pressure. It saves the synchronizer and realizes the stepless speed change of the liquid. The gear pump converts the kinetic energy of the flywheel into the mechanical energy of liquid, thereby facilitating the energy control and greatly improving the transmission efficiency (compared with a hydraulic torque converter). It is technically characterized in that; the transmission system is a set of medium and high pressure oil transmission system (compared with the oil pressure of a hydraulic torque converter) which is composed of a driving gear pump, a driven gear pump variable gear pump, an oil tank, an energy accumulator, a reversing valve, a proportional pressure regulating valve, an oil pipe, an oil inlet circulating valve, an idle valve and some control mechanisms. [ shown with reference to FIG. 1 ]. An oil inlet of the driving gear pump (2) is connected with an oil tank (1) through a low-pressure oil pipe, an oil outlet of the driving gear pump divides an oil path through a three-way pipe, the oil path is connected with an oil inlet of an idle valve (14 in the figure 1) through a high-pressure oil pipe, the oil path is connected with an oil inlet of an energy accumulator (4) through a high-pressure oil pipe, and an oil outlet of the idle valve is connected with the oil tank through a low-pressure oil pipe. The oil outlet of the energy accumulator is divided by a three-way pipe, one way is connected with the oil inlet of a clutch valve (3) by a high-pressure oil pipe, the other way is connected with the oil inlet of a proportional pressure regulating valve (5) by the high-pressure oil pipe, and the oil outlet of the clutch valve is connected with an oil tank by a common oil pipe. The oil outlet of the proportional pressure regulating valve is connected with an oil inlet of a reversing valve (6) through a high-pressure oil pipe, the oil outlet of the reversing valve is connected with an oil inlet of another proportional pressure regulating valve (12) through a high-pressure oil pipe, the pressure regulating valve is called as an oil outlet proportional pressure regulating valve, the oil outlet of the oil outlet proportional pressure regulating valve is connected with an oil tank (1) through a common oil pipe, four reversing ports ABCD of the reversing valve are connected with a driven gear pump set (8) through a high-pressure combined oil pipe (11), and the example of the figure 1 is 4 driven pumps. The method uses two proportional pressure regulating valves to ensure that the pressure of the transmission oil is not too low when the engine rotates at a low speed, so that the oil pressure of a transmission part in the system is kept in a certain range, and the proportional pressure regulating valves can automatically close part of the oil outlet caliber when the pressure of the transmission oil is low when the engine rotates at a low speed, so that the pressure of the transmission oil is increased. The specific working method is as follows; as shown in FIG. 6; transmission oil from the energy accumulator enters the valve from an oil inlet (1) of the proportional pressure regulating valve. When the engine is at a high rotating speed and the oil pressure is high, the transmission oil overcomes the resistance of the spring to push the valve core (a part shown in a figure 8) to move rightwards, the oil outlet grid can expose a larger area caliber, the oil outlet quantity is increased, the oil pressure is not greatly changed at the oil outlet of the valve, when the engine is at a low rotating speed and the oil pressure is low, the spring can push the valve core to move leftwards, the exposed area caliber of the oil outlet grid is closed, the oil outlet quantity is reduced, but the oil pressure is increased, so that the oil pressure of the oil outlet of the pressure regulating valve can be increased to a required value. The condition of the engine at the middle rotating speed is between the two conditions, and the pressure of the oil outlet of the proportional pressure regulating valve is always kept in a specified range. In order to make the transmission oil pressure more stable and prevent the pressure reduction caused by the energy consumed by the rotation of the gear in the system, an oil outlet proportional pressure regulating valve is also arranged on an oil path for discharging oil from the multi-path reversing valve to an oil tank, the oil pressure is regulated to compensate the energy consumed by the rotation of the gear, and the working process of the oil pressure regulating valve is the same as that of the upstream proportional pressure regulating valve and is lower than that of the upstream proportional pressure regulating valve in terms of pressure regulation. The compensation principle is that when the gear rotates to consume energy to cause pressure drop, the oil outlet proportional pressure regulating valve can reduce the oil outlet caliber of the oil outlet grid so as to cause pressure in an oil way to rise, so that the gear rotates slowly and energy consumption is reduced. In fact the energy consumed by the rotation of the gear itself is very limited. The idle valve has the function that when the engine runs at idle speed, transmission oil can directly enter the oil tank through the valve and does not participate in transmission. When the automobile runs, the transmission oil pressure is automatically closed when rising. The passage of the transmission oil to the oil tank through the valve is cut off. The working principle of the valve is illustrated in an attached figure (13), when an engine runs at idle speed, the transmission oil pressure is very low, the flow is very small, the thrust of a spring (6) pressing on a valve core sheet (4) cannot be overcome, and the valve core sheet is in an open state under the action of the thrust of the spring, so that the transmission oil can directly enter an oil tank through an idle speed valve. When the engine is accelerated, the pressure and the flow of the transmission oil are increased, and the valve core sheet (4) is pressed on the valve seat (7) by overcoming the thrust of the spring, so that the idle valve is in a closed state. The transmission oil is closed and enters the oil tank through the valve. The thrust adjusting screw (8) positioned on the valve body (1) can adjust the thrust of the spring to ensure that the valve core sheet is opened and closed to reach the optimal state. In order to keep the oil pressure of the transmission part in the system at a specified range value all the time, the oil supply quantity of the driving gear pump is required to be larger than the oil discharge quantity of the driven gear pump set. According to the method, the oil supply amount of the driven gear pump set can be changed by adjusting the opening and closing degrees of the clutch valve (shown in figure 14) and the oil inlet circulating valve (shown in figure 15), so that the speed of the driven pump is changed, and the output speed can also be changed by closing the number of the oil inlet circulating valves to change the pressure receiving area of the driven pump set. In the former method, the pressure area of the speed change gear pump set is large, so that the output torque is large and the speed is low. The latter method has small pressure area of the speed change gear pump set, so that the output torque is small. But at a fast speed, which is a liquid change. The driven gear pump is a gear pump which can change speed. So the gear pump is also called variable speed gear pump. It is technically characterized in that; the oil-pressing gear pair is obtained by changing some modules of a speed-changing gear pair in a gear transmission, and the gear pair is large and small in appearance (refer to fig. 3 and fig. 12). It uses medium and high pressure oil to transmit the first power, and solves the problem of low transmission efficiency. The torque converter is inefficient in transmission because of the low pressure of the transmission oil. Since the transmission efficiency is only related to the energy difference and process-independent. Fig. 3 is a sectional view of a variable speed gear pump along the center line of an oil inlet and an oil outlet, and fig. 12 is a structural sectional view. Four small circles not identified in fig. 3 are the screw holes of the pump. The system designed by the method is not provided with a synchronizer and a complex gear shifting mechanism, so that various damages caused by the gear transmission, such as impact damage to the synchronizer in the gear shifting process, and conditions of disorder, gear missing, clamping and the like caused by damage to the gear shifting mechanism of the gear transmission do not exist in the system. The oil drive is not limited by space and direction, and is very convenient. And has no abrasion, so the maintenance is basically free. The speed changer composed of the variable gear pump can also change the pressure area of the power output shaft so as to change the output torque (namely the speed change function), so that the speed can be changed steplessly, and the energy of each step is utilized. But such infinitely variable transmissions are not seamless. The active gear pump is a common gear pump. Since, according to experiments, the driven gear pump set start-up does not in fact require too high a pressure. The power of the active gear pump is selected according to the power of the engine, which is the product of the power of the engine and the efficiency of the mechanical transmission. The pressure is selected to be 5-10MPa [ experimental data, for reference only ]

Description of the drawings; FIG. 1 is an overall assembly view; the oil tank is 1, 2 initiative gear pumps, 3 clutch valve, 4 accumulators, 5 proportion air-vent valves, 6 multichannel switching valve, 7 oil inlet circulating valves, 8 gear pump (group). 9 power output shafts and 10 universal joints. 11 combination oil pipes and 12 oil outlet proportion pressure regulating valves. 13 circulating the oil pipe. 14 idle speed valve, 15 low pressure connecting oil pipe, 16 high pressure connecting oil pipe, 2 reversing valve and gear pump connecting assembly; 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 universal joint, 16, 17, 18, combination oil pipe, 20, 21 inner pipe oil outlet, 22 outer pipe oil outlet. And 23 circulating the oil pipe. 24 an oil inlet cycle valve lever. 25 variable speed gear pumps [ group ] fig. 3 variable speed gear pumps are cross-sectional view along the center line of the oil inlet and outlet; 1 oil inlet, 2 press oil gear pair, 3 oil-out. 4 connecting the flanges. FIG. 4 is a block diagram of an accumulator; the hydraulic cylinder comprises a nut 1, an oil cavity 2, a pressure limiting valve 3, a connecting oil pipe 4, a hydraulic cylinder 5, an energy storage spring 6, an air hole 7 and a piston 8. 9 piston ring. 10 connecting the flanges. FIG. 5 is an exploded view of the inner tube and the outer tube of the reversing valve; 1 inner tube switching-over mouth E, 2 inner tube oil grids, 3 jump ring grooves, 4 inner tube switching-over mouths F, 5 outer tube switching-over mouths B, 6 outer tube switching-over mouths D, 7 outer tube switching-over mouths C, 8 outer tube switching-over mouths A, 9 outer tube oil-out, 10 inner tube oil-out. 11 inner pipe, 12 partition, 13 outer pipe and 14 connecting flange. FIG. 6 is a schematic side view of a proportional pressure regulating valve; 1 oil inlet, 2 valve bodies, 3 springs, 4 supports, 5 spring seats, 6 pressure regulating screws, 7 oil outlets, 8 guide sleeves and 9 bearings. 10 valve core and 11 oil outlet grid. 12 are connected to the flange. Fig. 7 is a sectional view of a proportional pressure regulating valve structure, wherein the sectional view of the proportional pressure regulating valve structure is that an oil inlet is arranged at 1, a valve body is arranged at 2, a spring is arranged at 3, a support is arranged at 4, a spring seat is arranged at 5, a pressure regulating screw is arranged at 6, an oil outlet is arranged at 7, a guide sleeve is arranged at 8, a bearing is arranged. 12 connecting flanges and 13 screws. FIG. 8 is a side view of a valve core of the proportional pressure regulating valve, 10 is a valve core 11 oil outlet grid, 9 is a support front view of the proportional pressure regulating valve, 4 is a support, 5 is a spring seat, and 8 is a guide sleeve. Fig. 10 is a rear view of a valve core of the proportional pressure regulating valve, 2 is a valve body, 10 is a valve core bottom, fig. 11 is a front view of the valve core of the proportional pressure regulating valve, 2 is a valve body, 10 is a valve core front opening, fig. 12 is a structural section view of a variable gear pump, 1 is a pump body, 2 is a pump cover (two front and back), 3 is a driven gear, 4 is a bearing, 5 is an oil seal, 6 is a driving gear, 7 is a screw, and 8. FIG. 13 is an idle valve schematic; the valve body 1, the flange 2, the screw 3, the valve core plate 5, the oil inlet 6, the spring 7, the valve seat 8, the adjusting screw 9 and the oil outlet 9 are connected. Fig. 14 is a schematic view of a clutch valve, wherein an oil inlet 1 is provided with a conical valve plug 3, a valve body 4 is provided with a plunger 5, a plunger 5 is provided with an oil outlet 6, a valve seat 7 is provided with an oil outlet 6, and a screw 9 is provided with a valve cover. 10 connecting the flanges. FIG. 15 is a cross-sectional view of an oil inlet circulation valve; 1, an oil inlet, 2, a circulation port, 3, a valve core, 4, a valve core, 5, a valve cover, 6 and 7 are connected with a flange, 8 and a valve body through screws. FIG. 16; the side view of the oil inlet circulating valve is along A-A; 1 oil inlet 2, circulating port 3, operating rod 5, valve cover 6 and screw 7. 8 connecting the flanges. FIG. 17 is an enlarged view of a portion of the transmission oil circulating direction when the transmission gear pump is in operation; 1 oil inlet pipe [ combination oil pipe branch ] 2 oil inlet circulating valve 3 circulating oil pipe 4 change gear pump 5 oil inlet circulating valve core 6 control lever. 7 an oil inlet circulating valve circulation port. FIG. 18 is an enlarged view of a portion of the direction of circulation of the transmission oil during idling of the variable gear pump; 1 oil inlet pipe (combined oil pipe branch) 2 oil inlet circulating valve 3 circulating oil pipe 4 speed change gear pump 5 oil inlet circulating valve spool 6 operating lever 7 oil inlet circulating valve circulating port

A specific embodiment; the rear shaft of the engine flywheel is connected with a driving gear pump, and data such as the size, pressure, oil output and the like of the pump are calculated in advance according to the power of the engine. The calculation method is shown in the last two sentences of the invention content. Then, see a general assembly drawing of figure 1, wherein the number marks of the parts are as in (2), an oil inlet of a driving gear pump (2) is connected with an oil tank (1), an oil outlet divides an oil path by a three-way pipe, one path is connected with an oil inlet of an idle valve, the other path is connected with an oil inlet of an energy accumulator (4), and the oil outlet of the idle valve is connected with the oil tank by a low-pressure oil pipe. The accumulator is a hydraulic cylinder assembly with an energy storage spring arranged below a piston. As shown in figure 4, an energy storage spring (6) is arranged in a hydraulic cylinder (5) firstly, and then a piston (8) is arranged in the hydraulic cylinder, wherein the piston (8) is a cylindrical aluminum block movably matched with the inner diameter of the hydraulic cylinder, and a piston ring (9) is arranged on the piston. An oil cavity (2) is reserved in the cylinder body at the upper part of the piston, a connecting oil port is formed in the cylinder body, so that a single energy accumulator is connected into an assembly through an oil pipe (4), then the hydraulic cylinder (5) is covered through a nut (1), and then an air hole (7) is formed in the bottom of the hydraulic cylinder. The energy accumulator is used for absorbing energy fluctuation in the processes of storage and stable hydraulic transmission, and when the impact of energy exceeds a specified load, a pressure limiting valve (3) arranged on an oil pipe (4) connected with the energy accumulator is opened to release redundant pressure. The oil way of the oil outlet of the energy accumulator is divided, one way is connected with the oil inlet of a proportional pressure regulating valve (5) by a high-pressure oil pipe, the other way is connected with the oil inlet of a clutch valve (3) by the high-pressure oil pipe, and the oil outlet of the clutch valve is connected with an oil tank by a common oil pipe. The oil outlet of the proportional pressure regulating valve is connected with the oil inlet of a multi-path reversing valve 6 by a high-pressure oil pipe, the oil outlet of the multi-path reversing valve is connected with the oil inlet of an oil outlet proportional pressure regulating valve 12 by a high-pressure oil pipe, the oil outlet of the oil outlet proportional pressure regulating valve is connected with an oil tank by a common oil pipe, and four reversing ports ABCD of the reversing valve are connected with a driven gear pump set 8 by a combined oil pipe 11; an oil inlet circulating valve (7) is installed on an oil inlet pipe of each driven gear pump (variable gear pump), two high-pressure oil pipes, called circulating oil pipes, are installed on two circulating ports of the oil inlet circulating valve, and are respectively connected with an oil inlet pipe and an oil outlet pipe of the variable gear pump. Example four pumps, 4 oil inlet circulation valves. The oil inlet circulating valve is used for conveying transmission oil to the variable-speed gear pump and simultaneously opening the circulating opening when the oil inlet of the variable-speed gear pump is closed so as to ensure that the oil quantity of the variable-speed gear pump circularly flows and can idle. The structural principle is shown in a figure (15). The working process is shown in figure [ 17 ]; when the oil inlet circulating valve works normally, the valve core 5 of the oil inlet circulating valve is positioned on the right side of the valve body, the circulating port 7 is in a closed state, and transmission oil passes through the oil inlet and enters the variable-speed gear pump 4 to do work. When the oil pump works normally, the direction indicated by the arrow in the figure (17) is the flowing direction of the transmission oil. See figure [ 18 ]: when the variable gear pump needs to idle, the operating rod 6 pulls the valve core 5 to move leftwards, the oil inlet is closed, meanwhile, the circulation port 7 closed by the valve core 5 is opened, and the transmission oil enters the variable gear pump 4 again from the circulation port through the circulation oil pipe 3 to flow in a circulating mode, namely, the variable gear pump is in an idle state. When the transmission device idles, the direction shown by an arrow in the figure [ 18 ] is a transmission oil circulation loop. The circulation port and the oil inlet are equilateral long square ports, see figure (16), which can ensure that the closed area of the oil inlet and the opened area of the circulation port are always equal, thereby ensuring that the oil entering the variable-speed gear pump is constant and the speed of the variable-speed gear pump is not changed. Namely, the system energy disturbance can not be caused, and the operation is more stable. The multi-way reversing valve is called as a reversing valve for short, and is shown in an attached figure 2, the multi-way reversing valve is composed of an inner pipe and an outer pipe, the outer diameter of the inner pipe is equal to the inner diameter of the outer pipe, the inner pipe and the outer pipe are movably matched, in order to better understand the problem, a section of the two pipes is drawn in a figure 5, wherein the inner pipe (11) is a non-communicating pipe with a partition (12) in the middle, two reversing oil ports E and F are arranged on the pipes, are respectively positioned at two sides of the partition (12) and mutually form an angle of 180 degrees (shown in a figure 5), and an oil inlet grid (2) is arranged at one end of the inner pipe, which is provided with a clamp spring groove (3), so that oil can be fed in the rotation process. An oil outlet (10) is formed in the other end of the oil pipe, four reversing ports A, B, C and D and an oil outlet (9) are formed in an outer pipe (13), an inner pipe (11) is arranged in the outer pipe (13), and two reversing ports of the inner pipe are aligned with two reversing ports of the four reversing ports of the outer pipe. The other two outer tube reversal ports are naturally closed by the inner tube wall. Then clamping the inner tube neck clamp spring groove with clamp spring ring (6 in figure 2), and fixing the inner tube and the outer tube together with nut (7 in figure 2). After the reversing valve is assembled, the oil outlet (10) of the inner tube of the reversing valve is positioned in the oil outlet (9) of the outer tube, namely 22 and 21 in figure 2, namely the assembled state of the reversing valve. When the reversing handle (5) is upwards or downwards, the direction and the path shown by the arrow in the figure are the circulation loop of the transmission oil, see fig. 2. The speed change gear pump set can be pressed to rotate as long as transmission oil enters, and power is output. When the handle of the reversing valve is downward, the engine is started, the transmission oil enters the energy accumulator from the driving gear pump, the transmission oil is divided into two paths after coming out of the energy accumulator, one path directly enters the oil tank through the clutch valve (3 in figure 1), the other path enters the proportional pressure regulating valve and enters the oil inlet of the reversing valve after pressure regulation, if the clutch valve is opened, the transmission oil directly enters the oil tank through the clutch valve without going in the direction of the reversing valve with the resistance of the gear pump according to the characteristic that the oil pressure does not go high when going low, and the transmission oil is in a neutral gear and does not have power output when going in. Slowly close the clutch valve (see fig. 14), push rod 5 by operating mechanism, then plunger 4 and conical valve plug 2 connected will move left, slowly close oil inlet 1. [ can also move rapidly ]. The clutch is combined, the oil pressure in the direction of the reversing valve is gradually increased after the clutch valve is closed, when the pressure reaches a certain degree and is enough to press the variable speed gear pump to rotate, the transmission oil enters an oil inlet grid part (8) of an inner tube of the reversing valve from an oil inlet of the reversing valve (shown in figure 2), enters the inner tube, enters a reversing port B of the outer tube from a reversing port E of the inner tube, then enters the combined oil tube, and the reversing port A of the outer tube is not communicated due to the closing of the wall of the inner tube, so the transmission oil can only continuously move forward to enter the variable speed gear pump set to do work and press the variable speed gear pump set to rotate. And then the oil outlet of the variable speed gear pump enters the combined oil pipe on the other side, and because the outer pipe reversing port D on the other side of the reversing valve is closed by the inner pipe wall, the oil can only enter the inner pipe reversing port F through the outer pipe reversing port C, then enters the oil outlet proportional pressure regulating valve through the oil outlet of the outer pipe from the oil outlet of the inner pipe, and enters the oil tank after the pressure regulation. The oil outlet proportion pressure regulating valve is used for being matched with the oil inlet proportion pressure regulating valve, and the oil outlet proportion pressure regulating valve is used for regulating the oil outlet proportion pressure regulating valve when the transmission oil pressure is low, so that the system transmission oil pressure is kept normal. When the handle of the reversing valve is upward, the flow direction of the transmission oil in the variable gear pump is opposite, and the description is omitted. The transmission oil enters the driven gear pump to press the driven gear pump to rotate, power is output, and the automobile can start to run. An oil inlet circulating valve (7 in figure 1) is arranged on an oil pipe of each driven gear pump, when all the oil inlet circulating valves are opened, the pressure area borne by the power output shaft is the largest, the output torque is the largest at the moment, and the speed is the lowest. And when the oil inlet circulating valves of the driven pump are closed, the pressure area of the power output shaft is reduced, the output torque is reduced, but the speed is increased. When only one oil inlet circulating valve is closed, the pressure area of the power output shaft is the minimum, the output torque is the minimum, and the speed is the fastest. This is the shifting process. The power output shafts of the driven gear pumps are connected by universal joints, and the sizes of the driven pumps can be different. In fact, because a single gear pump has a speed change function, the automobile can work by only one driven pump no matter starting or normal running, and the gear pump set at the moment is equivalent to a gear transmission assembly, and only a synchronizer and a shifting mechanism are saved. As it is not required. Since the gear ratio of each variable gear pump is different, one driven pump is a gear. Therefore, in actual use, the driving gear pump only needs to drive one of the variable-speed gear pumps, and the flow of the driving pump is far larger than that of any driven pump, so that the transmission oil pressure can be kept at medium and high pressure all the time, the higher the pressure is, the higher the transmission efficiency is, and the more oil is saved. Thereby achieving the purpose of designing the method. When one driven pump is driven, the other driven pumps are in an idling state because the circulating valve is opened, so that the connecting shaft does not generate resistance.

The medium-high pressure referred to herein has no fixed standard, but is an approximate range with respect to the torque converter oil pressure. The oil temperature of the transmission oil rises quickly during transmission and must be radiated, so the oil tank can be directly made into a radiator shape and installed in front of an automobile fan to facilitate the radiation, and the oil tank is not shown because the radiator shape is unique. The pressure limiting valve is a common oil gas pressure limiting valve, and the driving pump is a common gear pump, which are not in the innovation range of the invention, so that no drawing is provided. The operating mechanism is designed on the vehicle, and drawings and descriptions are not provided herein. The proportional pressure regulating valve, the idle valve, the energy accumulator, the reversing valve, the circulating valve, the variable gear pump and the like are innovative designs of the inventor, and the proportional pressure regulating valve, the idle valve, the energy accumulator, the reversing valve, the circulating valve, the variable gear pump and the like are not produced, so that no specific component structure and a connection method are provided. Designed herein is a method.

According to the theory, the more the active pump flow is greater than the slave pump flow, the better the active pump flow is, and the fact that the active pump flow is greater than the slave pump flow is not, because the active pump flow is too much, the accessories are difficult to bear, and the transmission efficiency is reduced. Presumably related to the viscosity of the oil. Due to the experimental conditions, the optimal data of the flow rate of the active pump and the flow rate of the driven pump cannot be provided.