WO2013013364A1

WO2013013364A1 - Direct combustion type plunger hydraulic pump

Info

Publication number: WO2013013364A1
Application number: PCT/CN2011/002018
Authority: WO
Inventors: 唐忠盛
Original assignee: Tang Zhongsheng
Priority date: 2011-07-28
Filing date: 2011-12-02
Publication date: 2013-01-31
Also published as: US20140208732A1

Abstract

A direct combustion type plunger hydraulic pump includes a burner (1), a high temperature heat exchanger (2), a steam chamber (3), at least one cylinder plunger mechanism (10), a steam type refrigerator (15) and a control system. The high temperature heat exchanger (2) is connected to the burner (1) through a pipeline. The steam chamber (3) is a sealed container in which a water nozzle (4) is provided above the high temperature heat exchanger (2).The cylinder plunger mechanism (10) is installed above the steam chamber (3) and mainly comprises a cylinder (20) and a plunger (21). The piston of the cylinder (20) is connected to the piston of the plunger (21) through a mandril (30) with a reset mechanism. A steam-intake valve (22) is provided on the bottom of the cylinder (20) to communicate with the steam chamber (3) and a steam-exhaust valve (23) is provided on the side wall of the cylinder. An oil inlet and an oil outlet are provided on the top of the plunger (21). The steam-exhaust valve (23) is connected to the refrigerator (15) through a steam-exhaust pipe (14), and the refrigerator (15) is connected with a water tank (8). The direct combustion type plunger hydraulic pump has advantages of simple structure, energy save and high efficiency. Most of thermal energy produced by fuel is used for providing power for a hydraulic machine through heat exchange, so the energy waste is low.

Description

Description Direct combustion piston hydraulic pump Technical field:

The present invention relates to the field of hydraulic power, and more particularly to a direct-fired plunger hydraulic pump that uses fuel to directly convert thermal energy into hydraulic energy.

BACKGROUND OF THE INVENTION With the mature application of hydraulic technology, more and more mechanical devices with hydraulic power as driving force, such as hydraulic excavators, hydraulic shovel, hydraulic rock drilling rigs, full hydraulic forklifts, etc., have emerged. The characteristics are: Without the traditional mechanical transmission mechanism, all the movements of the machine are driven by hydraulic energy to drive the hydraulic motor and the hydraulic cylinder. The hydraulic pump is a hydraulic component that provides hydraulic energy. The function of the hydraulic pump is to convert the mechanical energy of the prime mover into hydraulic energy to power the entire hydraulic system. The hydraulic pump is generally constructed in the form of a gear pump, a vane pump and a plunger pump. The plunger type hydraulic pump relies on the plunger to reciprocate in the cylinder to change the volume of the sealing working chamber to achieve oil absorption and oil pressure. The plunger pump has the advantages of high rated pressure, compact structure, high efficiency and convenient flow adjustment. It is widely used in high pressure, large flow and flow adjustment situations, as described in various hydraulic machinery.

The prior art of the plunger pump is mainly composed of an axial piston pump and a radial piston pump. The piston pump shaft is driven by an engine or a motor, and the rotary motion of the shaft is converted into a reciprocating motion of the plunger. Thereby, the pressure energy of converting the mechanical energy of the prime mover into a liquid is realized. In this process of energy conversion, we found that it experienced: the conversion of thermal energy into mechanical energy through the diesel engine, and the conversion of mechanical energy into hydraulic energy through the hydraulic oil pump. In the current situation of limited mechanical efficiency conversion, these two conversions There is a high energy loss in the steps. Especially the diesel engine converts thermal energy into a confirmation In the process of mechanical energy, only a small part of thermal energy expansion is used for work, and most of the heat is released through the exhaust and the radiator, and the energy loss is large. Under the current situation of declining global petroleum resources and rising energy prices, how to save energy and reduce emissions in various economic construction activities has become a global concern. Summary of the invention:

The technical problem to be solved by the present invention is to provide a direct-fired plunger hydraulic pump that directly converts thermal energy into hydraulic energy by using fuel to reduce the intermediate link of energy conversion and reduce energy loss, thereby achieving the purpose of energy saving and consumption reduction.

The present invention solves the above technical problems in the following technical solutions:

The direct-fired plunger hydraulic pump of the present invention comprises a burner 1, a high temperature heat exchanger 2, a steam chamber 3, at least one cylinder plunger mechanism 10, a steam type refrigerator 15 and a control system; the high temperature heat exchanger 2 passes through a pipeline It is connected to the burner 1 and placed in the steam chamber 3; the steam chamber 3 is a sealed container having a water spray head 4 disposed above the high temperature heat exchanger 2, and the water spray head 4 is connected to the water supply through the water pipe. The valve 5, the water pump 7 and the water tank 8; the cylinder plunger mechanism 10 is mounted above the steam chamber 3, which is mainly composed of a cylinder 20 and a plunger 21, the piston of the cylinder 20 and the piston of the plunger 21 pass through the top of the belt reset mechanism The rods 30 are connected to each other. The bottom end of the cylinder 20 is provided with an inlet width 2 for connecting the steam chamber 3. The side wall of the cylinder 20 is provided with a steam exhaust valve 23, and the top end of the plunger 21 is provided with an oil outlet connecting the high pressure oil pipe 12 and connecting the oil tank. The oil inlet port is respectively provided with a unidirectional width 26 on the oil inlet port and the oil outlet port; the exhaust steam width 23 is connected to the steam type refrigerator 15 through the exhaust pipe 14 , and the condensate drain pipe of the steam type refrigerator 15 Connect the water tank 8.

The reset mechanism on the jack 30 is a spring 11, and the magazine 11 is placed over the jack 30 and placed above the piston of the cylinder 20.

The reset mechanism on the jack 30 is a rocker arm structure, and the rocker arm structure is composed of a rocker arm seat 24 and a rocker arm. 25 and the connecting rod 31, the middle of the rocker arm 25 is movably connected with the rocker seat 24, and the two ends of the rocker arm 25 are respectively connected with the jacks 30 of the two cylinder plunger mechanisms 10 via the connecting rod 31, and the connecting rod 31 and the rocking The arms 25 and the connecting rod 31 and the jack 30 are hinged. The steam type refrigerator 15 is provided with a circulating cold water pipe 16 that connects the hydraulic oil water cooler 17 or/and the air conditioner 18. The invention can also be connected with a low temperature heat exchanger 6 on the water pipe connecting the water tank 8 and the water spray head 4, and the low temperature heat exchanger 6 and the high temperature heat exchanger 2 are connected through the pipeline. At least one safety valve 13 communicating with the exhaust pipe 14 is mounted on the steam chamber 3.

The control system includes a microcomputer processor 29, a stroke sensor 27 mounted on the jack 30, a temperature sensor 19 mounted on the high temperature heat exchanger 2, a pressure sensor 9 installed in the steam chamber 3, and a burner 1 The upper burner controller 29, the water supply valve 5, the inlet valve 22 and the exhaust manifold 23, the signal input end of the microcomputer processor 28 is connected in parallel to the stroke sensor 27, the temperature sensor 19 and the pressure sensor 9, the signal output end thereof The burner controller 29, the water supply valve 5, the inlet manifold 22, and the exhaust valve 23 are connected in parallel. The present invention does not require the prime mover to provide power, not the thermal energy converted to mechanical energy by the engine, and the hydraulic pump converts the mechanical energy into hydraulic energy. Compared with the prior art, the present invention saves a complicated mechanism such as a crankshaft flywheel, and most of the heat generated by the fuel is used for work, and the energy loss is small. Therefore, it has the advantages of simple structure, energy saving and high efficiency, and will provide a revolutionary and improved power source for all hydraulic machinery. Description:

Figure 1 is a schematic view showing the main structure of a direct-fired plunger hydraulic pump of the present invention. Fig. 2 is a schematic view showing the structure of a cylinder plunger mechanism of another structure according to the present invention. Figure 3 is a schematic diagram of the control system of the direct-fired plunger hydraulic pump of the present invention. In the picture:

1 - burner, 2-high temperature heat exchanger, 3- steam chamber, 4-spray head, 5-water supply

6 - low temperature heat exchanger, 7-water pump, 8-water tank, 9-pressure sensor, 10-cylinder plunger mechanism, 11 - spring, 12-high pressure oil pipe, 13-safety wide, 14-exhaust pipe, 15-steam Refrigerator, 16-cycle cold water pipe, 17-hydraulic oil water cooler, 18-air conditioner, 19-temperature sensor, 20-cylinder, 21-plunger,

22 - inlet valve, 23-exhaust valve, 24-rocker seat, 25-rocker, 26-check valve, 27-stroke sensor,

28 - Microcomputer processor, 29-burner controller, 30-pin, 31-link.

detailed description:

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

As shown in FIG. 1, the burner 1 is connected to the high temperature heat exchanger 2 through a pipeline, and the high temperature gas generated by the combustion of the burner 1 directly enters the high temperature heat exchanger 2. The high temperature heat exchanger 2 is in the steam chamber 3 of the sealed container, the cylinder plunger mechanism 10 is installed above the steam chamber 3, and the steam chamber 3 is provided with a water jet head 4 placed above the high temperature heat exchanger 2, when the water Injected into the high temperature heat exchanger 2, the water is vaporized by the high temperature to generate steam, and as the steam is continuously generated, the entire steam chamber is in a high pressure state. The water jet head 4 is connected to the water supply valve 5, the low temperature heat exchanger 6, the water pump 7 and the water tank 8 through a water pipe, and the low temperature heat exchanger 6 and the high temperature heat exchanger 2 are connected via an exhaust pipe. The cylinder plunger mechanism 10 is mainly composed of a cylinder 20 and a plunger 21, and the cylinder 20 is disposed corresponding to the plunger 21. The piston of the cylinder 20 and the piston of the plunger 21 are connected by a jack 30 with a reset mechanism, and the reset on the jack 30 The mechanism is a spring 11, and the spring 11 is sleeved on the jack 30 and placed above the piston of the cylinder 20. The cylinder 11 can be pushed back to the initial state by the spring 11, and the bottom end of the cylinder 20 is provided with an inlet valve 2 that communicates with the steam chamber 3. The side wall of the plunger 21 is provided with an exhaust valve 23, and the top end of the plunger 21 is provided with an oil outlet connecting the high pressure oil pipe 12 and an oil inlet port connecting the oil tank, and a check valve 26 is respectively arranged on the oil inlet port and the oil outlet port. The exhaust steam width 23 is connected to the steam type refrigerator 15 through the exhaust pipe 14, the condensate drain pipe of the steam type refrigerator 15 is connected to the water tank 8, and a circulating cold water pipe 16 may be added to the steam type refrigerator 15 to be connected. The hydraulic oil water cooler 17 and/or the air conditioner 18 dissipate heat. The burner 1 used in the present invention can select various burners according to needs, and the fuel can be diesel, gasoline, natural gas or the like, and even a burner for burning solid fuel can be used in the invention, as long as the high temperature gas generated by the combustion is introduced into the high temperature. The heat exchanger can work.

The high temperature heat exchanger 2 used in the present invention functions to transfer the heat energy generated by the burner to the water to vaporize the water. In the prior art, such as a ceramic high temperature heat exchanger, it has been able to reach a high temperature of more than one thousand degrees.

The steam type refrigerator 15 used in the present invention is a prior art, which uses lithium bromide-water as a working medium and is powered by saturated steam input from the exhaust pipe 14, absorbs heat energy in the steam and condenses the steam into water, and can be externally Cold water is supplied, which is output through the circulating cold water pipe 16, and can be used for the hydraulic oil cooler 17 and the cab air conditioner 18 and the like. Of course, in some special cases, the present invention can also use a conventional steam condenser instead of a steam type refrigerator, as long as the steam discharged from the cylinder 20 is condensed into water and introduced into the water tank 8, without affecting the use of the present invention.

The cylinder plunger mechanism 10 used in the present invention can also adopt the structure shown in FIG. 2, and the reset mechanism on the jack 30 is a rocker arm structure composed of a rocker arm seat 24, a rocker arm 25 and a link 31. The rocker arm 25 is connected between the two cylinders, the rocker arm seat 24 is fixed on the frame, and the middle of the rocker arm 25 is movably connected with the rocker arm seat 24, and the two ends of the rocker arm 25 are respectively connected to the link 31 and the two The jacks 30 are connected, and the links between the links 31 and the rocker arms 25 and between the links 31 and the jacks 30 are hinged. While one cylinder piston is driven by high pressure steam, the other cylinder piston is reset by the rocker arm. Cylinders with a rocker arm configuration must be arranged in pairs.

Figure 3 is a schematic diagram of the control system of the present invention: it includes a microcomputer processor 29, a stroke sensor 27 mounted on the jack 30, a temperature sensor 19 mounted on the high temperature heat exchanger 2, and a pressure installed in the steam chamber 3. a sensor 9, a burner controller 29 provided on the burner 1, and a water supply valve 5, The inlet valve 22, the exhaust valve 23, and the signal input end of the microcomputer processor 28 are connected in parallel to the stroke sensor 27, the temperature sensor 19 and the pressure sensor 9, and the signal output ends are connected in parallel to the burner controller 29 and the water supply valve. 5. Inlet valve 22 and exhaust valve 23. After adopting the above scheme, the present invention generates heat by burning fuel from the burner 1, and vaporizes the water into steam through the temperature-heat exchanger 2, generating a high pressure in the steam chamber 3, and the high-pressure steam directly pushes the piston in the cylinder 20 to move, the cylinder 20 The piston is connected to the piston of the plunger 21 through the ram, so that the piston in the plunger 21 moves synchronously, thereby discharging the hydraulic oil in the plunger 21 from the high pressure oil pipe 12, thereby generating hydraulic energy. After the completion of the push of the cylinder 2Q, the steam can enter the steam type chiller 15 through the reset mechanism on the ram 30, releasing the heat energy contained in the steam, and being condensed into water to enter the water tank 8. The steam chiller 15 absorbs the heat energy of the steam, and the output cold water can be used for hydraulic oil cooling or cab air conditioning. After the combustion gas releases the heat energy through the high temperature heat exchanger 2, it enters the low temperature heat exchanger 6 again, further recovers the heat energy, and preheats the water ready to enter the steam chamber 3. Since the amount of heat emitted from the outside is extremely small, the heat energy loss is greatly reduced.

During operation, the burner 1 ignites, and heat energy is blown into the high temperature heat exchanger 2, and the microcomputer sensor 28 collects the temperature of the high temperature heat exchanger 2 through the temperature sensor 19. After reaching the set temperature, an instruction is issued to open the water supply valve 5, the water pump 7 Simultaneously with the water supply valve 5, water is sprayed from the water spray head 4 onto the high temperature heat exchanger 2, which generates water vapor by heat and forms a high pressure in the steam chamber 3.

The pressure sensor 9 transmits the pressure condition in the steam chamber 3 to the microcomputer processor 28, and after reaching a certain pressure value, issues an instruction to open the inlet valve 22, the high pressure steam enters the cylinder 20, and the piston in the cylinder 20 is moved, in the plunger 21 The piston is also moved synchronously to discharge the hydraulic oil in the plunger 21 from the high pressure oil pipe 12 to form hydraulic energy.

The stroke sensor 27 transmits the piston position of the cylinder 20 to the microcomputer processor 28. Upon reaching the set position, the microcomputer processor 28 issues an instruction, the inlet valve 22 is closed, and the exhaust valve 23 is opened. The cylinder is reset by a reset mechanism on the jack 30 to exhaust steam from the cylinder 20 from the exhaust valve 23. The steam discharged from the exhaust manifold 23 is introduced into the steam type refrigerator 15 through the exhaust pipe 14, and the heat energy contained in the steam is exchanged to the steam type refrigerator 15 and condensed into water to enter the water tank 8, thereby completing the steam-water cycle.

In order to improve the fuel heat utilization efficiency, the present invention also provides a low temperature heat exchanger 6 for absorbing heat in the gas discharged from the high temperature heat exchanger 2 for use in preheating the water prepared to enter the steam chamber. After passing through the low temperature heat exchanger 6, the temperature of the exhaust gas discharged is lower, and the water entering the steam chamber 3 is more easily vaporized into steam due to absorption of a certain heat energy.

The cylinder plunger mechanism 10 used in the present invention can be designed as needed to meet the demand for a large flow of hydraulic energy. When adjusting the flow according to different load requirements, it is only necessary to control the microcomputer processor 28, and open a different number of inlet steam widths 22 to obtain the hydraulic energy of various flows, and the variable pump function can be easily realized. The diameter of the piston in the cylinder 20 can be larger than the diameter of the piston in the plunger 21 so that higher pressure hydraulic energy can be obtained with less pressure steam. Of course, in some special occasions, it is also possible to reverse the diameter of the piston in the cylinder 20 to be smaller than the diameter of the piston in the plunger 21 to obtain a low pressure and a large flow of hydraulic energy.

One or more safety valves 13 are installed in the steam chamber 3. When the pressure in the steam chamber 3 exceeds a set value, the discharge portion of the steam is turned on to ensure safety. The steam discharged through the safety valve 13 also enters the exhaust pipe 14.

Under normal operating conditions, the microcomputer processor 28 can adjust the number of plungers participating in the operation by controlling the number of inlet valves 22 according to the demand of the external load, thereby providing hydraulic oil of different flow rates. By controlling the water supply valve 5, the amount of water entering the steam chamber 3 can be precisely controlled, thereby precisely controlling the steam pressure in the steam chamber 3, maintaining a stable pressure in the steam chamber 3; by controlling the burner controller 29, The increase or decrease in the heating power of the burner 1 keeps the temperature on the high temperature heat exchanger 2 stable, so that the entire machine operates in an optimum state.

Claims

Claim

A direct-fired plunger hydraulic pump, characterized in that it comprises a burner (1), a high temperature heat exchanger (2), a steam chamber (3), at least one cylinder plunger mechanism (10), a steam type refrigerator (15) and a control system; the high temperature heat exchanger (2) is connected to the burner (1) through a pipe and placed in the steam chamber (3); the steam chamber (3) is a sealed container, which is inside a water jet head placed above the high temperature heat exchanger (2)

(4), the water spray head (4) is connected to the water supply valve (5), the water pump (7) and the water tank (8) through a water pipe; the cylinder plunger mechanism (10) is installed above the steam chamber (3), which is mainly The cylinder (20) and the plunger (21) are configured. The piston of the cylinder (20) and the piston of the plunger (21) are connected by a jack (30) with a reset mechanism, and the bottom end of the cylinder (20) is provided with a communication steam chamber. (3) The inlet valve (2) has a steam exhaust valve (23) on the side wall thereof, and a top end of the plunger (21) is provided with an oil outlet connecting the high pressure oil pipe (12) and an oil inlet connecting the oil tank. A check valve (26) is respectively arranged at the oil inlet and the oil outlet; the steam exhaust valve (23) is connected to the steam type refrigerator (15) through the exhaust pipe (14), and the steam type refrigerator (15) The condensate drain pipe is connected to the water tank (8).

The direct-fired plunger hydraulic pump according to claim 1, characterized in that the reset mechanism on the jack (30) is a spring (11), and the spring (11) is placed on the jack (30) It is placed above the piston of the cylinder (20).

The direct-fired plunger hydraulic pump according to claim 1, wherein the reset mechanism on the jack (30) is a rocker arm structure, and the rocker arm structure is shaken by a rocker seat (24) The arm (25) and the connecting rod (31) are formed, and the middle of the rocker arm (25) is movably connected with the rocker seat (24), and the two ends of the rocker arm (25) are respectively connected via the connecting rod (31) and the two cylinder plungers The ejector (30) of the mechanism (10) is connected, and the connecting rod (31) and the rocker arm (25) and the connecting rod (31) and the ram (30) are hinged.

The direct-fired plunger hydraulic pump according to claim 1, wherein the steam type The refrigerator (15) is provided with a circulating cold water pipe (16) connected to the hydraulic oil water cooler (17) or/and the air conditioner (18).

The direct-fired plunger hydraulic pump according to claim 1, characterized in that the water pipe connecting the water tank (8) and the water spray head (4) is connected with a low temperature heat exchanger (6), a low temperature heat exchanger (6) Connected to the high temperature heat exchanger (2) through the pipeline.

The direct-fired plunger hydraulic pump according to claim 1, characterized in that at least one safety valve (13) communicating with the exhaust pipe (14) is mounted on the steam chamber (3).

The direct-fired plunger hydraulic pump according to claim 1, wherein the control system comprises a microcomputer processor (29), a stroke sensor (27) mounted on the jack (30), and is mounted on Temperature sensor (19) on the high temperature heat exchanger (2), pressure sensor (9) installed in the steam chamber (3), burner controller (29) on the burner (1), water supply valve ( 5), inlet valve (22) and exhaust valve (23), the signal input of the microcomputer processor (28) is connected in parallel with the stroke: sensor (27), temperature sensor (19) and pressure sensor (9), The signal output terminals are connected in parallel to the burner controller (29), the water supply valve (5), the inlet valve (22) and the exhaust valve (23).