CN102913325B - Engine hydraulic energy and power conversion device - Google Patents

Abstract

The invention belongs to the technical field of internal combustion engine energy conversion, and relates to an engine hydraulic energy and power conversion device. The oil pan is fixedly installed on the crankcase of the lower body, and the first and second pump seats are respectively fixedly installed between the cylinder block and the lower body. , the two pump seats are symmetrically arranged on both sides of the body; the piston-rod assembly is composed of the working piston, the upper connecting rod, the guide piston and the connecting rod; the guide piston is hinged on the small end of the connecting rod; the big end of the connecting rod is connected to the On the crank pin of the crankshaft; the first and second plunger pumps are fixedly installed between the first and second pump seats, and the drive of the two plunger pumps is hinged on the first wishbone pin of the upper connecting rod to form symmetry Drive structure, or an asymmetric drive structure formed on the first and second wishbone pins hinged at different positions of the upper connecting rod; the crankshaft is fixedly installed in the crankshaft hole of the lower body; its structure is simple, its principle is reliable, and its energy utilization efficiency High, cost-saving, fast power transmission, environment-friendly.

Description

An engine hydraulic energy and power conversion device

Technical field:

The invention belongs to the technical field of internal combustion engine energy conversion, and relates to a structure for internal energy conversion of an engine, in particular to an engine hydraulic energy and power conversion device.

Background technique:

At present, for reciprocating engines, in order to improve the efficiency of power machinery, it is necessary not only to improve the effective efficiency of the engine, but also to tap the potential of improving the comprehensive efficiency of power machinery; the hydraulic free piston engine is a good example. But because the hydraulic free piston engine has problems such as unstable top dead center and poor ignition stability, it has been difficult to be popularized and used; although other similar types of engines can solve the problems existing in the free piston engine, they have poor power transmission reliability, mechanical How to comprehensively realize the high efficiency and working reliability of the engine hydraulic energy and power conversion will be the key issue of the engine structure improvement technology. The multi-link structure is adopted to realize the efficient internal conversion of power and the reliability of the force. The transfer process is an innovative technical issue being discussed by scientific and technical personnel in the industry.

Invention content:

The purpose of the present invention is to overcome the shortcomings of the prior art, in order to make up for the related shortcomings of hydraulic free piston engines and similar engines, the multi-link structure is used to ensure the reliability of efficient internal power conversion process and force transmission, and realize The efficient power output of the engine seeks to design and provide an engine hydraulic energy and power conversion device.

In order to achieve the above object, the main structure of the present invention includes a cylinder head, a working piston, a cylinder body, an upper connecting rod, a first and a bifurcated rod pin, a first and a bifurcated rod, a first and a second plunger connecting pin , the first and second plunger pumps, the first and second plungers, the first and second plunger springs, the first and second pump bodies, the first and second pump seats, guide pistons, lower bodies, connecting rods, crankshafts and oil Bottom shell; the body assembly is composed of cylinder head, cylinder block, lower body and oil pan, and the cylinder block and lower body are integrated structure; the oil pan is fixedly installed on the crankcase of the lower body to form a body assembly structure closed up and down ; The first pump seat and the second pump seat are fixedly installed between the cylinder block and the lower body respectively, and are used to support the first plunger pump and the second plunger pump. The two pump seats are arranged symmetrically on both sides of the body. There is precise positioning between the body to ensure its position accuracy and the movement relationship of the pump plunger; the piston-rod assembly is composed of a working piston, an upper connecting rod, a guide piston and a connecting rod, and the working piston is hinged to the upper connecting rod through a piston pin; The upper connecting rod is fixedly installed on the guide piston; the guide piston is hinged to the small end of the connecting rod through the piston pin; the big end of the connecting rod is connected to the crank pin of the crankshaft; the first plunger pump and the second plunger pump are arranged on the machine body The two sides of the pump are fixedly installed between the first pump base and the second pump base, and its structure is the same as that of a general-purpose plunger pump. The pin shaft of the shape rod is connected with the pin shaft of the second fork rod, the connecting pin of the first plunger and the connecting pin of the second plunger to form a transmission relationship of motion; the drive of the two plunger pumps is driven by the first fork rod and the second The fork rod is hinged on the pin shaft of the first fork rod of the upper link to form a symmetrical driving structure, which is used for the working piston to drive the two plunger pumps in the downstroke mode, or the first fork hinged at different positions of the upper link An asymmetrical drive structure is formed on the pin shaft of the rod and the pin shaft of the second fork rod, which is used for the working mode of the plunger pump driven by both the up and down strokes of the working piston; Piston engine; the connection structure relationship of the guide piston, connecting rod, lower body and crankshaft is the same as that of the ordinary reciprocating piston engine; the first pump seat, the second pump seat, the cylinder block and the lower body are assembled into one body to form the body of the engine Combination; the crankshaft is fixedly installed in the crankshaft hole of the lower body; the working piston, the upper connecting rod, the guide piston and the connecting rod are combined, and the first fork rod is connected by the pin shaft of the first fork rod and the pin shaft of the second fork rod and the second fork rod are hinged on the upper connecting rod to form a piston connecting rod assembly; the connecting rod assembly is inserted into the body combination of the engine through the cylinder hole on the cylinder block, during the insertion process, when the first fork rod and the second When the fork end of the fork rod reaches the pump installation hole, introduce the two fork rods into the pump installation hole, and there are installation auxiliary holes on the horizontal sides of the first pump base and the second pump base to assist the two forks The connection between the shaped rod and the two plunger connecting pins, according to the positioning requirements of the plunger pump, the first plunger pump and the second plunger pump are inserted into the corresponding pump seat, the first plunger connecting pin and the second plunger The connecting pin is connected with the fork of the first fork rod and the second fork rod, and then respectively fix the first plunger pump and the second plunger pump and the first pump seat and the second pump seat, and Seal the installation auxiliary holes of the two pump seats; the matching installation of the connecting rod and the crankshaft of the connecting rod assembly is the same as that of the traditional engine; the cylinder head is fixedly installed on the upper end of the cylinder block to close the top of the engine; the oil bottom is fixedly installed on the lower part of the lower body The casing closes the bottom of the engine; the principle of the two plunger pumps is the same as that of the ordinary plunger pump, and the pipeline layout is set according to the overall structure of the engine.

The combustion working process of the present invention is the same as that of a traditional reciprocating piston four-stroke engine. The combustion chamber is composed of a cylinder head, a working piston and a cylinder block. The fork rod and the second fork rod are transmitted to the first plunger pump and the second plunger pump, and the other is transmitted to the crankshaft through the guide piston, and the guide piston and the working piston move synchronously; when the plunger pump has a symmetrical drive structure , during the downstroke of the working piston (suction and power strokes), the first and second fork-shaped rods on both sides push the first and second plungers of the plunger pump to make horizontal movements outward, compress the fluid in the pump, and output hydraulic energy ; During the upward stroke of the piston, the first and second plungers on both sides of the symmetrical structure reset under the action of the first and second plunger springs, the plunger pump is in the liquid inlet stroke, and the process ends when the working piston reaches the top dead center, and the engine The plunger pump completes one work per revolution; when the plunger pump has an asymmetric drive structure, when the working piston is in the downstroke (suction and power stroke), the first fork-shaped rod on the left side of the asymmetric structure pushes the first The plunger moves outward horizontally to output hydraulic energy; the second plunger on the right is reset under the action of the second plunger spring, and is in the liquid inlet stroke; Resetting under the action of the first plunger spring, the first plunger pump on the left is in the liquid inlet stroke; the second fork rod on the right pushes the second plunger outward to make a horizontal movement, compressing the fluid in the pump and outputting hydraulic pressure In each stroke of the engine, there is a plunger pump doing work, which makes the engine run more uniformly; the engine can output hydraulic power and mechanical power in different proportions from the plunger pump and crankshaft according to the needs.

Compared with the prior art, the present invention overcomes the problems of unfixed top dead center and poor ignition stability of free-piston hydraulic engines, as well as the problems of poor force transmission reliability and reduced mechanical efficiency in other similar engines. The connecting rod structure realizes efficient power conversion inside the machine and reliable force transmission process; it has simple structure, reliable principle, high energy utilization efficiency, cost saving, fast power transmission and environmental friendliness.

Description of drawings:

Fig. 1 is a schematic diagram of the symmetrical structure principle of the main structure of the present invention.

Fig. 2 is a schematic diagram of the principle of the asymmetric structure of the main structure of the present invention.

Detailed ways:

Further description will be given below through the embodiments and in conjunction with the accompanying drawings.

The main structure of this embodiment includes a cylinder head 1, a working piston 2, a cylinder block 3, an upper connecting rod 4, a first, a bifurcated rod pin 5 and 25, a first, a bifurcated rod 6 and 18, a first , two plunger connecting pins 7 and 19, the first and second plunger pumps 9 and 20, the first and second plungers 8 and 23, the first and second plunger springs 10 and 21, the first and second pump bodies 11 and 22. First and second pump seats 12 and 24, guide piston 13, lower body 14, connecting rod 15, crankshaft 16 and oil pan 17; composed of cylinder head 1, cylinder block 3, lower body 14 and oil pan 17 The body assembly, the cylinder block 3 and the lower body 14 are made into an integrated structure, just like the cylinder head 1 of a traditional engine is installed on the cylinder block 3; the oil pan 17 is fixedly installed on the crankcase of the lower body 14, forming a closed body group structure up and down; The first pump seat 12 and the second pump seat 24 are fixedly installed between the cylinder block 3 and the lower body 14 respectively, and are used to support the first plunger pump 9 and the second plunger pump 20, and the two pump seats are symmetrically arranged on the body There is precise positioning between the two sides of the body and the body to ensure its position accuracy and the movement relationship of the pump plunger; the piston connecting rod assembly is composed of the working piston 2, the upper connecting rod 4, the guide piston 13 and the connecting rod 15, and the working piston 2 Hinged with the upper connecting rod 4 through the piston pin; the upper connecting rod 4 is fixedly installed on the guide piston 13; the guide piston 13 is hinged on the small end of the connecting rod 15 through the piston pin; the big end of the connecting rod 15 is connected to the crank of the crankshaft 16 On the pin; the first plunger pump 9 and the second plunger pump 20 are arranged on both sides of the body and fixedly installed between the first pump seat 12 and the second pump seat 24, and its structure is the same as that of a general-purpose plunger pump , the upper link 4 is composed of the first fork rod 6 and the second fork rod 18 through the first fork rod pin 5 and the second fork rod pin 25, the first plunger connecting pin 7 and the second column The plug connection pin 19 is connected to form a motion transmission relationship; the driving first fork rod 6 and the second fork rod 18 of the two plunger pumps are hinged on the first fork rod pin 5 of the upper link 4 to form a symmetrical The driving structure, as shown in Figure 1, is used for the working mode of driving the two plunger pumps in the downstroke of the working piston 2, or the first fork-shaped rod pin 5 and the second fork-shaped rod pin hinged at different positions of the upper connecting rod 4 An asymmetric drive structure is formed on the shaft 25, as shown in Figure 2, it is used to drive the plunger pump working mode in both the upper and lower strokes of the working piston 2; Reciprocating piston engine; the connecting structure relationship of guide piston 13, connecting rod 15, lower body 14 and crankshaft 16 is the same as that of common reciprocating piston engine; first pump seat 12, second pump seat 24, cylinder block 3 and lower body 14 are assembled into one body to form the body combination of the engine; the crankshaft 16 is installed and fixed in the crankshaft hole of the lower body 14; The shaft 5 and the second fork rod pin 25 hinge the first fork rod 6 and the second fork rod 18 on the upper connecting rod 4 to form a piston connecting rod assembly; connect the connecting rod through the cylinder hole on the cylinder block 3 Components are inserted into the airframe assembly of the engine, during insertion , when the forked ends of the first fork rod 6 and the second fork rod 18 reach the pump installation hole, introduce the two fork rods into the pump installation hole, the level of the first pump seat 12 and the second pump seat 24 There are installation auxiliary holes on both sides, which are used to assist the connection between the two fork rods and the two plunger connecting pins. According to the positioning requirements of the plunger pump, the first plunger pump 9 and the second plunger pump 20 are inserted into the corresponding Inside the pump seat, the first plunger connecting pin 7 and the second plunger connecting pin 19 are connected with the forks of the first fork rod 6 and the second fork rod 18, and then respectively fix the first plunger pump 9 and the second Piston pump 20 and the first pump seat 12 and the second pump seat 24, and block the installation auxiliary holes of two pump seats; The upper end of the body 3 is fixedly installed with the cylinder head 1 to seal the top of the engine; the oil pan 17 is fixedly installed at the bottom of the lower body 14 to seal the bottom of the engine; set for the overall structure.

During the operation of this embodiment, the connecting rod assembly reciprocates, driving the first and fork-shaped rods 6 and 18 to move, pushing the plunger to perform fluid compression work, the reset of the plunger is realized by the plunger spring, and the plunger pump The working principle is the same as that of a common plunger pump; the movement of the guide piston 13, connecting rod 15 and crankshaft 16 of the connecting rod assembly is the same as that of a common reciprocating engine; the engine can simultaneously output hydraulic energy from the plunger pump and output from the crankshaft Mechanical energy or force.

Claims (2)

1. An engine hydraulic energy and power conversion device is characterized in that the main structure includes a cylinder head, a working piston, a cylinder block, an upper connecting rod, the first and two fork rod pins, the first and two fork rods, the first 1st, 2nd plunger connecting pin, 1st, 2nd plunger pump, 1st, 2nd plunger, 1st, 2nd plunger spring, 1st, 2nd pump body, 1st, 2nd pump seat, guide piston, lower body , connecting rod, crankshaft and oil pan; the body assembly is composed of cylinder head, cylinder block, lower body and oil pan, and the cylinder block and lower body are integrated structure; the oil pan is fixedly installed on the crankcase of the lower body, Form a body assembly structure closed up and down; the first pump seat and the second pump seat are fixedly installed between the cylinder block and the lower body, respectively, to support the first plunger pump and the second plunger pump, and the two pump seats are arranged symmetrically On both sides of the body, there is precise positioning with the body to ensure its position accuracy and the movement relationship of the pump plunger; the piston-rod assembly is composed of a working piston, an upper connecting rod, a guide piston and a connecting rod, and the working piston passes through the piston. The pin is hinged with the upper connecting rod; the upper connecting rod is fixedly installed on the guide piston; the guide piston is hinged to the small end of the connecting rod through the piston pin; the big end of the connecting rod is connected to the crank pin of the crankshaft; the first plunger pump and the second The two plunger pumps are arranged on both sides of the body and fixedly installed between the first pump base and the second pump base. Its structure is the same as that of the general plunger pump. The shape bar is connected by the pin shaft of the first fork bar and the pin shaft of the second fork bar, the connecting pin of the first plunger and the connecting pin of the second plunger to form a motion transmission relationship; the drive of the two plunger pumps is driven by the second A fork rod and a second fork rod are hinged on the pin shaft of the first fork rod of the upper link to form a symmetrical drive structure, which is used for the working piston to drive the two plunger pumps in the downstroke mode, or hinged on the upper link The pin shafts of the first fork rod and the pin shaft of the second fork rod at different positions form an asymmetric driving structure, which is used for the working mode of the plunger pump driven by both the up and down strokes of the working piston; the cylinder head, the working piston and the cylinder block The connection structure relationship is the same as that of the ordinary reciprocating piston engine; the connection structure relationship of the guide piston, connecting rod, lower body and crankshaft is the same as that of the ordinary reciprocating piston engine; the first pump seat, the second pump seat, the cylinder block and the lower body are assembled The crankshaft is fixedly installed in the crankshaft hole of the lower body; the working piston, the upper connecting rod, the guide piston and the connecting rod are connected and assembled through the pin shaft of the first wishbone and the pin of the second wishbone. The shaft hinges the first fork rod and the second fork rod on the upper connecting rod to form a piston connecting rod assembly; insert the connecting rod assembly into the engine body combination through the cylinder hole on the cylinder block, during the insertion process, when the first When the fork ends of the first fork rod and the second fork rod reach the pump installation hole, the two fork rods are introduced into the pump installation hole, and the horizontal sides of the first pump base and the second pump base are provided with installation auxiliary holes , used to assist the connection between the two fork rods and the two plunger connecting pins. According to the positioning requirements of the plunger pump, the first plunger pump and the second plunger pump are inserted into the corresponding pump seats, and the first plunger The connecting pin and the second plunger connecting pin are connected with the forks of the first fork rod and the second fork rod, and then fix the first plunger pump and the second plunger pump with the first fork respectively. One pump seat and the second pump seat, and plug the installation auxiliary holes of the two pump seats; the matching installation of the connecting rod and the crankshaft of the connecting rod assembly is the same as that of the traditional engine; the cylinder head is fixedly installed on the upper end of the cylinder block for sealing The top of the engine; the oil pan is fixedly installed at the lower part of the lower body to seal the bottom of the engine; the principle of the two plunger pumps is the same as that of the ordinary plunger pump, and the pipeline layout is set according to the overall structure of the engine. 2. The engine hydraulic energy and power conversion device according to claim 1 is characterized in that the combustion process is the same as a traditional reciprocating piston four-stroke engine, and the combustion chamber is formed by the cylinder head, the working piston and the cylinder block, and the combustion produces The expansion force is transmitted in two ways through the upper connecting rod, one of which is transmitted to the first plunger pump and the second plunger pump through the first fork rod and the second fork rod, and the other is transmitted to the crankshaft through the guide piston. The piston and the working piston move synchronously; when the plunger pump is in a symmetrical drive structure, when the working piston is in the downward stroke, the first and second fork-shaped rods on both sides push the first and second plungers of the plunger pump outward to make a horizontal Movement, compressing the fluid in the pump, and outputting hydraulic energy; when the piston is in the upward stroke, the first and second plungers on both sides of the symmetrical structure are reset under the action of the first and second plunger springs, the plunger pump is in the liquid inlet stroke, and the working piston The process ends when the top dead center is reached, and the plunger pump completes one work per revolution of the engine; when the plunger pump has an asymmetric drive structure, when the working piston is on a downstroke, the first fork rod on the left side of the asymmetric structure Push the first plunger outward to make a horizontal movement to output hydraulic energy; the second plunger on the right is reset under the action of the second plunger spring, and is in the liquid inlet stroke; One plunger resets under the action of the first plunger spring, the first plunger pump on the left is in the liquid intake stroke; the second fork rod on the right pushes the second plunger outward to make a horizontal movement, compressing the fluid in the pump , to output hydraulic energy; in each stroke of the engine, there is a plunger pump doing work, which makes the engine run more uniformly; the engine can output hydraulic power and mechanical power in different proportions from the plunger pump and crankshaft according to needs.