CN2881123Y

CN2881123Y - Motor having two-regenerator

Info

Publication number: CN2881123Y
Application number: CN 200520130305
Authority: CN
Inventors: 李建锋
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-10-31
Filing date: 2005-10-31
Publication date: 2007-03-21
Anticipated expiration: 2015-10-31

Abstract

A new type motor having two-regenerator comprises a big cylinder, a big piston, a small cylinder, a small piston, a cooler, two regenerator, and relevant valves. The motor is characterized in that the two regenerators are connected by change valves and are arranged between the big cylinder and the small cylinder while the output of the big cylinder is communicated with the two regenerators by change valves, the cooler is arranged in the small cylinder and an intake valve is equipped on the head of the small cylinder. The utility model eliminates the temperature difference loss in the heating of an outside heat source and the flow resistance in the heater; wherein the cooling of gas can be accomplished by low-temperature parts or by spraying liquid which is due to the open circulation. The flow resistance can be tiny when fluid spraying is adopted in the cooling and no leakage problem is in the system, which makes the lubrication of the piston more convenient and cheap.

Description

The new work engine of the two regenerators of band

Technical field

The utility model relates to a kind of novel piston formula motor, belongs to the thermal power field.

Background technique

Existing motor the inside includes the conventional internal combustion type piston engine and Stirling (Stirling) cycle engine of external-burning type.Wherein Stirling cylic engine is a closed cycle of utilizing the external heat source heating.Adopt Stirling circuit reciprocating engine generally to form by two piston-cylinders, a heater, a cooler and a regenerator.Be filled with a certain amount of working medium (as hydrogen, helium or nitrogen etc.) because the to-and-fro motion of piston in the cylinder the inside, working medium flows between hot gas chamber and cold air chamber back and forth, finish following four processes: constant temperature compression process, constant volume endothermic process, constant temperature inflation process and constant volume exothermic process, thus constituted a complete circulation.

Be under the ideal situation in each process, the Stirling circulation is the generality Carnot's cycle, and its thermal efficiency is:

η = 1 - \frac{T_{L}}{T_{H}} - - - 1

T in the formula _H, T _LTwo temperature upper and lower for cyclic process.

But in real process, in order to prevent the leakage of working medium in running, thus require the sealing between piston and the casing wall should be fine on the one hand, but this is unfavorable to reducing to rub; Also limited the Maximum operating pressure in its cyclic process on the other hand, this will have a negative impact to its power; Because Stirling engine is to utilize external heat source working medium to be heated in that hot gas is indoor, so the nonreversibility of heating process also can influence its efficient; With respect to air, it is expensive many that the cycle fluid of Stirling engine is also wanted; In addition, in order to coordinate the motion of two pistons, the structure of Stirling engine is also comparatively complicated.

With high content of technology, complex structure, cost just because of Stirling engine are high, so reciprocating engine commonly used seldom has the Stirling of employing circuit, the general employing is to be open type level pressure heating (Diesel) circulation, constant volume heating (Otto) circulation and the Hybrid Heating circulation of cycle fluid with the air.The Stirling of comparing circulation, these three kinds of circuit Maximum operating pressures and temperature are much higher.But the structure that is limited to present reciprocating engine, general exothermic process all is the constant volume heat release, this can cause certain loss in efficiency, for fear of this loss, the reciprocating engine back that has has also installed a tail gas turbine additional, further the mechanical energy in the exhaust being reclaimed, but this has increased the cost of reciprocating engine again, therefore only uses when power is bigger.

, can improve in conjunction with the structure of Stirling engine and the characteristics of comprehensive existing piston formula motor high workload pressure and high-temperature scope, it is adopted with the air is the open cycle of cycle fluid, thereby further improves its efficient for this reason.

Summary of the invention

The purpose of this utility model provides a kind of new work engine with two regenerators, solve and improve the efficient of reciprocating engine and the problem that reduces cost more fully, the utility model motor is changed into the closed cycle of original Stirling engine and is utilized the open cycle of air for cycle fluid.

The technological scheme that the utility model adopted is: the closed cycle of original Stirling engine is changed into the open cycle that application of air is a working medium, remove its heater, heating process changes the burning mode of heating into, accurately controls the straying quatity of fuel to guarantee the temperature-resistant of heating process as far as possible in spraying into the process of fuel; The twin-tub system that employing varies in size and adopt two regenerators.The two cover cylinder/piston systems that why instead vary in size, main cause are that the gas of High Temperature High Pressure in big cylinder can expand more fully, so that improve system thermal efficiency, avoid installing the tail gas turbine simultaneously, to reduce system cost; Adopting two regenerators, is because in the alternation process of regenerator, and its internal gas pressure is because be heated and will raise, thereby makes system can obtain higher Maximum operating pressure, helps improving the power and the efficient of system.

The new work engine of the two regenerators of this band, constitute by big cylinder, big piston, little cylinder, small piston, cooler, two regenerators and relevant valve, it is characterized in that regenerator and regenerator are installed in parallel between big cylinder and little cylinder by change-over valve and change-over valve; The outlet of simultaneously big cylinder links to each other with regenerator and regenerator by change-over valve, and cooler is arranged in the little cylinder, and the head of little cylinder also is equipped with air intake valve.

The utility model has the advantages that its structure is big or small twin-tub system and adopts two regenerators, utilize air to be cycle fluid, so be an open cycle, the temperature difference loss when having avoided the heating of outer thermal source has also been avoided the flow resistance of heater; Simultaneously owing to be open cycle, so the cooling procedure of gas can utilize cryogenic fluid to cool off, also can adopt the mode of liquid (for example water) spraying to cool off, when adopting the liquid spray cooling, the flow resistance of cooler also can be ignored; And needn't worry the leakage problem of system, so more convenient aspect piston lubricated, cost is also lower.

Description of drawings

Fig. 1 is an embodiment's a structural representation;

Fig. 2 is another embodiment's a structural representation;

Fig. 3 is the 3rd embodiment's a structural representation.

Embodiment

In the embodiment in figure 1, regenerator 5 and regenerator 6 are installed in parallel between big cylinder 2 and stingy cylinder 10 by change-over valve 4 and change-over valve 7; The outlet of simultaneously big cylinder 2 links to each other with regenerator 5 and regenerator 6 by change-over valve 3.Cooler 9 is arranged in the stingy cylinder 10, and the head of stingy cylinder 10 also is equipped with air intake valve 8.

Among Fig. 1 in the working procedure of system, because there are two regenerators in system: regenerator 5 and regenerator 6, so its big piston 1 is just relative more flexible with the cooperation of small piston 11 methods of operation, can synchronous operation, also can asynchronously move.Here be that example illustrates its working procedure with synchronous operation: when big piston 1, small piston 11 upwards moved simultaneously, valve 8 was closed, and change-over valve 4 is also closed; The path that change-over valve 7 leads to regenerator 5 is opened, and leads to the path blockade of regenerator 6; And change-over valve 3 leads to the path of regenerator 6 and opens, and closes the passage that leads to regenerator 5, and the gas in this moment little cylinder is compressed in the regenerator 5, and the weary gas in the big cylinder 2 are discharged in the regenerator 6.

Certainly, when big piston 1 and small piston 11 upwards moved, change-over valve 3 also can be opened the passage that leads to regenerator 5 and close the passage that leads to regenerator 6, and the pressurized gas of this moment will enter in the regenerator 5 simultaneously with the weary gas of acting; When big piston 1 upwards moved once more simultaneously with small piston 11, pressurized gas will enter in the regenerator 6 simultaneously with the weary gas of acting simultaneously.

When big piston 1 moved downwards simultaneously with small piston 11, valve 8 was opened, and change-over valve 7 is closed, and ambient air enters stingy cylinder 10; Meanwhile, change-over valve 3 is closed, and opens the passage between regenerator 6 and the big cylinder 2 in the change-over valve 4, and the pressurized gas in the regenerator 6 enter the acting of expanding in the big cylinder 2.

When big piston 1 upwards moves once more with small piston 11, then enter regenerator 6 by change-over valve 7 by the gas after stingy cylinder 10 compressions; Same, the weary gas in the big cylinder 2 then enters regenerator 5 by change-over valve 3.And when big piston 1 and small piston 11 moved downwards once more, the gas that is stored in the regenerator 5 entered the acting of expanding in the big cylinder 2, finished a circulation.

In the embodiment of Fig. 2, change-over valve 3, change-over valve 4 and change-over valve 7 are respectively by valve 14, valve 15, and valve 12, valve 13 and valve 16, valve 17 replace.In this cover system, the relation between the switch situation of each valve and the traffic direction of piston sees the following form:

In the embodiments of figure 3, be the inside that cooler 9 is not arranged in stingy cylinder 10 with different place shown in Figure 1, but it be installed between stingy cylinder 10 and the change-over valve 7 by valve 18.The switch situation of valve 18 is: open when big piston 1 upwards moves with small piston 11, otherwise close in the time of their operations downwards.The switch situation of all the other valves is identical with the embodiment among Fig. 1.

In the utility model, consider the frictional loss that big piston 1 is in operation, the actual volume of big cylinder 2 has an optimum value after the actual volume of stingy cylinder 10 is determined.

In the utility model, regenerator 5 and regenerator 6 all will have the certain accumulation of heat and the ability of stored-gas.

Claims

A kind of new work engine with two regenerators, constitute by big cylinder, big piston, little cylinder, small piston, cooler, two regenerators and relevant valve, it is characterized in that regenerator and regenerator are installed in parallel between big cylinder and little cylinder by change-over valve and change-over valve; The outlet of simultaneously big cylinder links to each other with regenerator and regenerator by change-over valve, and cooler is arranged in the little cylinder, and the head of little cylinder also is equipped with air intake valve.