CN113202624A

CN113202624A - Universal double-cylinder opposed engine

Info

Publication number: CN113202624A
Application number: CN202110663585.5A
Authority: CN
Inventors: 彭轻松; 杞绍祥
Original assignee: Tianjin Stable Technology Co ltd
Current assignee: Tianjin Stable Technology Co ltd
Priority date: 2021-06-16
Filing date: 2021-06-16
Publication date: 2021-08-03

Abstract

The invention provides a general double-cylinder opposed engine, which belongs to the field of two-stroke engines and comprises an air inlet valve, a crankcase, a piston, a cylinder and an exhaust pipe, wherein the air inlet valve is arranged at the lower end of the crankcase through an air inlet pipe, an air equalizing mechanism is arranged in the air inlet pipe and used for keeping mixed gas in the crankcase uniform when air is fed, a crankshaft is arranged in the crankcase, a stirring part is arranged on a crankshaft arm of the crankshaft, the cylinder is oppositely arranged at two sides of the crankcase, a combustion chamber is arranged in the cylinder, the piston is arranged in the combustion chamber in a matched mode through the crankshaft, a piston groove is arranged on the piston in a surrounding mode, a piston ring is arranged in the piston groove, a scavenging port, an air inlet, a spark plug and an exhaust port are arranged on the cylinder, the exhaust pipe is arranged at the lower end of the cylinder, and the exhaust port extends to the exhaust pipe from the cylinder. The invention has the advantages of enabling the mixed gas in the cylinder to be uniformly combusted, avoiding the deformation of the exhaust port and improving the durability of the equipment.

Description

Universal double-cylinder opposed engine

Technical Field

The invention belongs to the field of two-stroke engines, and particularly relates to a universal type double-cylinder opposed engine.

Background

Double-cylinder opposition engine that present market used, when the user used, because of the gaseous mixture in the cylinder is admitted air inequality, causes the double-cylinder uneven combustion, the work of doing work is uneven, durability can poor scheduling problem, and the gas vent is the position that the engine temperature is the highest, and the gas vent causes the extrusion to draw the jar scheduling problem because of the high temperature produces the deformation easily, makes the current double-cylinder opposition engine can't satisfy more fields and more user's user demand.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a universal double-cylinder opposed engine which can enable mixed gas in a cylinder to be uniformly combusted, avoid deformation of an exhaust port and improve the durability of equipment.

In order to solve the technical problems, the invention adopts the technical scheme that: the utility model provides a general type double-cylinder opposition engine, includes crankcase, piston and cylinder be provided with the bent axle in the crankcase, the cylinder sets up relatively the both sides of crankcase, be provided with the combustion chamber in the cylinder, the piston passes through the bent axle cooperation sets up in the combustion chamber, be equipped with scavenging port, air inlet, spark plug and gas vent on the cylinder, its characterized in that: the gas mixing device comprises a gas inlet valve, a gas exhaust pipe, a gas homogenizing mechanism and a stirring part, wherein the gas inlet valve is arranged at the lower end of the crankcase through a gas inlet pipe, the gas exhaust pipe is arranged at the lower end of the cylinder, and the gas exhaust port extends to the gas exhaust pipe from the cylinder;

the gas homogenizing mechanism is arranged in the gas inlet pipe and used for keeping the mixed gas in the crankcase uniform when gas is fed, and comprises a support frame and an oil blocking part, wherein the oil blocking part is arranged in the support frame, and a gas inlet groove is formed in the support frame;

the stirring portion is provided on a crank arm of the crankshaft, and is used for stirring the mixed gas in the crankcase.

Furthermore, each side of support frame leans out by the top, the air inlet duct is all established each side of support frame, the bottom of support frame with the admission valve is linked together, the support frame is the tower type. The tower structure makes the air intake uniform.

Furthermore, the oil blocking part is arranged at the top in the supporting frame and is in an inverted cone shape and used for collecting oil in the mixed gas. Improve the problem of oil accumulation and improve the combustion efficiency.

Further, the stirring portion includes a first end portion disposed at one side of the crank arm and a second end portion extending to the other side of the crank arm. The first end part can be obliquely connected with the second end part and can also be connected in parallel, and the gas in the crankcase is uniform through the arrangement of the stirring part.

Further, the blast pipe is including the exhaust upper tube and the exhaust low tube that set gradually, the gas vent runs through the exhaust upper tube, the width of gas vent by the cylinder to the exhaust upper tube enlarges gradually. Compared with a vertical exhaust port, the flow dead angle is reduced, and the exhaust range is enlarged.

Further, the gas vent includes first inner wall and to the second inner wall of first inner wall slope be provided with the third inner wall under the second inner wall, the third inner wall has the radian, first inner wall all with the second inner wall with the third inner wall is level and smooth to be linked to each other.

Furthermore, a support sheet is arranged at the inlet of the upper exhaust pipe, and a silencing part is arranged in the lower exhaust pipe. The support of the support sheet for the exhaust port can prevent deformation caused by high temperature.

Further, a piston groove is formed in the piston in a surrounding mode, and a piston ring is arranged in the piston groove.

Further, the piston groove is arranged on one side close to the piston head, at least one piston groove is arranged, one end, away from the head, of the piston groove is perpendicular to the end face of the piston, the other end of the piston groove inclines outwards from the groove bottom to the groove opening, and the piston groove and the piston ring are in a right trapezoid shape. The arrangement of the piston ring can reduce the generation of carbon deposition.

The invention has the advantages and positive effects that:

1. by adopting the technical scheme, the mixed gas uniformly enters the cylinder through the arrangement of the gas homogenizing mechanism and the stirring part, so that the combustion uniformity of the two cylinders of the engine is improved, the vibration caused by the uneven combustion of the two cylinders is solved, and the problem of oil accumulation can be improved due to the arrangement of the oil blocking part.

2. The width of the exhaust port is gradually enlarged, and the inner walls are smoothly connected, so that the flow dead angle is reduced, the exhaust range is enlarged, and the support sheet is arranged, so that the deformation of the exhaust port in a high-temperature state can be prevented, the cylinder pulling is avoided, and the use durability is improved.

3. The piston is provided with the trapezoidal piston groove, and the piston ring is arranged in the piston groove, so that the sealing property between the piston and the combustion chamber is increased, the combustion efficiency is improved, and the generation of carbon deposition is reduced.

4. Through the setting of gas mechanism, stirring portion, gas vent and piston ring, improved the homogeneity of engine two jar burning greatly to solve the vibration that produces because of two jar burning inequality, and improved durability, thereby can satisfy more service environment's requirement.

Drawings

FIG. 1 is a block diagram of the present invention;

FIG. 2 is a front view of the present invention;

FIG. 3 is a structural diagram of a gas homogenizing mechanism according to the present invention;

FIG. 4 is a detail view of section A of the present invention;

FIG. 5 is a top view of the vent of the present invention;

fig. 6 is a view showing the construction of the piston of the present invention.

In the figure:

1. an intake valve; 2. an air inlet pipe; 21. a support frame; 22. an air inlet groove; 23. an oil blocking portion; 3. a crankcase; 4. a crankshaft; 41. a connecting rod; 42. a crank arm; 43. a stirring section; 431. a first end portion; 432. a second end portion; 5. a piston; 51. a piston groove; 6. a combustion chamber; 61. a scavenging port; 62. an air inlet; 7. a cylinder; 8. a spark plug; 9. an exhaust port; 91. a first inner wall; 92. a second inner wall; 93. a third inner wall; 94. a support sheet; 10. an exhaust upper pipe; 11. an exhaust lower pipe; 111. a sound deadening portion.

Detailed Description

The present invention will be further described with reference to the following examples and the accompanying drawings.

As shown in fig. 1 to 6, the present embodiment provides a universal twin-cylinder opposed engine, which includes an intake valve 1, a crankcase 3, a piston 5, a connecting rod 41, two cylinders 7 and an exhaust pipe, wherein the intake valve 1 is connected to a lower end of the crankcase 3 through an intake pipe 2, the two cylinders 7 and the exhaust pipe are disposed, the two cylinders 7 are disposed at two opposite ends of the crankcase 3, the exhaust pipe is connected to a lower end of the cylinder 7, and an exhaust port 9 is disposed in the exhaust pipe.

The crankshaft 4 is arranged in the crankcase 3, two pistons 5 and two connecting rods 41 are arranged, the two pistons 5 are oppositely arranged on the crankshaft 4 through the two connecting rods 41 respectively, a scavenging port 61, an air inlet 62 and a combustion chamber 6 are arranged in the cylinder 7, the scavenging port 61 and the air inlet 62 are communicated with the combustion chamber 6 and the crankcase 3 respectively, the piston 5 is arranged in the combustion chamber 6 in a matched mode, a spark plug 8 is arranged on the cylinder 7, the spark plug 8 enables mixed gas to be combusted and do work in the combustion chamber 6, the piston 5 is pushed, and the crankshaft 4 is driven to rotate through reciprocating motion of the two pistons 5. The above is the structure of the two-stroke engine, and the details are not repeated herein.

Be provided with the mechanism of gas evening in intake pipe 2 for when admitting air, the gas mixture in the crankcase 3 keeps even, and the mechanism of gas evening includes support frame 21 and hinders oily portion 23, hinders oily portion 23 and sets up in support frame 21, is equipped with air inlet duct 22 on support frame 21.

The shape of support frame 21 can be polyhedron or cylinder, each side of support frame 21 can lean out, each side of support frame 21 can also vertical setting, in this embodiment, support frame 21 is the hexahedron, each side of support frame 21 leans out by the top, wholly be the tower type, each side at support frame 21 is equipped with air inlet duct 22, the bottom surface of support frame 21 link up with admission valve 1 mutually, make 1 gaseous accessible air inlet duct 22 of admission valve get into in the crankcase 3, top in support frame 21 is provided with hinders oily portion 23, it is the back taper to hinder oily portion 23, the contained angle of awl point is not more than 90 degrees, it makes the interior oil content of gas mixture collect to hinder oily portion 23, the long-pending oil problem is improved, and the combustion efficiency is improved.

The crank arm 42 of the crankshaft 4 is provided with a stirring part 43, the stirring part 43 is used for stirring the mixed gas in the crank chamber 3 to enable the gas to uniformly enter the combustion chamber 6, the first end part 431 of the stirring part 43 is arranged on one side of the crank arm 42, the second end part 432 of the stirring part 43 extends to the other side of the crank arm 42, the shape of the stirring part 43 is not limited, and can be triangular or rectangular, the first end part 431 and the second end part 432 of the stirring part can be obliquely arranged or arranged in parallel, in the embodiment, the stirring part 43 is an arc-shaped convex block, the first end part 431 is arranged on one side of the crank arm 42, the second end part 432 is obliquely extended to the other side of the crank arm, the radius of the arc of the stirring part 43 is not more than R1000mm, and the vertical distance from the first end part 431 to the second end part 432 of the stirring part 43 is not more than 500 mm.

The blast pipe is including the exhaust upper tube 10 and the exhaust lower tube 11 that set gradually, exhaust upper tube 10 sets up the lower extreme at cylinder 7, be provided with amortization portion 111 in exhaust lower tube 11, amortization portion 111 adopts the amortization pipe, the effect of amortization has been played, gas vent 9 is established in exhaust upper tube 10, gas vent 9 link up with cylinder 7 mutually, gas vent 9 is including setting up first inner wall 91 and the second inner wall 92 and the third inner wall 93 of setting on exhaust upper tube 10 one side, third inner wall 93 is located the below of second inner wall 92, first inner wall 91 all links to each other with second inner wall 92 and third inner wall 93 are level and smooth.

The side end of the first inner wall 91 is parallel to the side wall of the upper exhaust pipe 10, the second inner wall 92 inclines towards the first inner wall 91, the included angle formed by the first inner wall 91 and the second inner wall 92 is not more than 180 degrees, the third inner wall 93 has a radian and is arc-shaped, a support sheet 94 is arranged at the inlet of the upper exhaust pipe 10, the support sheet 94 enables the upper exhaust pipe 10 to be equally divided into two chambers, the section view of the exhaust port 9 in the upper exhaust pipe 10 is in a shape of 'K', the diameter of the bottom of the upper exhaust pipe 10 is not more than phi 1000mm, the radian of the third inner wall 93 is not more than R1000mm, the distance from the intersection point of the first inner wall 91 and the second inner wall 92 of the exhaust port 9 to the bottom of the exhaust port 9 is not more than 500mm, and the length of the distance is not more than 500 mm.

Close to the one side of piston 5 head on piston 5, at least, encircle and be equipped with a piston groove 51, piston groove 51 is kept away from the one end of piston 5 head and is mutually perpendicular with piston 5's terminal surface, piston groove 51's the other end, by the tank bottom to the notch outside slope gradually, make tank bottom to notch widen gradually, the width of tank bottom is less than the width of notch, be right trapezoid, the piston ring is provided with in piston groove 51 fit, piston groove 51 all is right trapezoid with the piston ring, piston groove 51's degree of depth is for being not more than 100 mm.

The working process of the example is as follows:

the mixed gas enters the air inlet pipe 2 through the air inlet valve 1 and the air inlet groove 22 in sequence, the oil blocking part 23 prevents oil accumulation, and the oil accumulation is collected to the oil blocking part 23, and the invention operates by the following strokes:

a first stroke: the piston 5 moves upward from the bottom dead center, the intake port 62, the scavenging port 61, and the exhaust port 9 are closed by the movement stroke of the piston 5, the air-fuel mixture introduced into the cylinder 7 is compressed, the intake port 62 is exposed at this time, and the air-fuel mixture flows into the crankcase 3.

A second stroke: when the piston 5 moves up to the top dead center, the spark plug 8 ignites the mixed gas, the mixed gas is ignited, the piston 5 is pushed to do work downwards, the piston ring in the piston groove 51 expands after being heated, the piston ring is firmly matched in the piston groove 51, at the moment, the piston 5 pre-compresses the mixed gas in the crankcase, the stirring part 43 stirs the pre-compressed mixed gas, so that the gas intake is uniform, the exhaust port 9 is exposed, the combusted waste gas is discharged from the exhaust port 9, the noise is reduced by the silencing part 111, then the scavenging port 61 is exposed, the pre-compressed mixed gas enters the combustion chamber 6, the waste gas is expelled, and the air exchange is performed.

The invention has the beneficial effects that:

through the setting of mechanism upper bracket 21 of all breathing in, guaranteed the homogeneity of admitting air, make the gaseous mixture homogeneous combustion in the engine cylinder 7, avoid because of the uneven burning that causes of admitting air, do workmanship uneven to reduce the vibration of engine, improve product durability, satisfy more service environment's requirement, hinder the setting of oil portion 23, prevented the production of long-pending oil, improved combustion efficiency.

The stirring portion 43 provided in the crank arm 42 stirs the mixture gas at the time of pre-compression, thereby further ensuring the uniformity of intake air.

The arrangement of the supporting sheet 94 on the exhaust port 9 supports the exhaust port 9, so that the exhaust port of the cylinder 7 is prevented from being deformed when the engine is in a high-temperature state, the exhaust port 9 is gradually enlarged from inside to outside, the exhaust gas is convenient to discharge, the first inner wall 91 is smoothly connected with the second inner wall 92 and the third inner wall 93, the flowing dead angle is reduced, and the exhaust efficiency is improved.

The trapezoidal piston groove 51 and the piston ring arranged on the piston 5 can better improve the combustion efficiency, reduce the generation of carbon deposition, avoid the locking of the piston and the piston ring caused by the carbon deposition, and improve the durability of the product.

While one or more embodiments of the present invention have been described in detail, the description is in the nature of preferred embodiments of the invention and is not intended to limit the scope of the invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.

Claims

1. A universal two-cylinder opposed engine, comprising a crankcase (3), a piston (5) and a cylinder (7), a crankshaft (4) is provided in the crankcase (3), the cylinder (7) ) are relatively arranged on both sides of the crankcase (3), a combustion chamber (6) is arranged in the cylinder (7), and the piston (5) is arranged in the combustion chamber through the crankshaft (4). In the chamber (6), a scavenging port (61), an intake port (62), a spark plug (8) and an exhaust port (9) are arranged on the cylinder (7), characterized in that: an intake valve ( 1), an exhaust pipe, an air equalizing mechanism and a stirring part (43), the intake valve (1) is arranged at the lower end of the crankcase (3) through the intake pipe (2), and the exhaust pipe is arranged at the lower end of the crankcase (3); the lower end of the cylinder (7), the exhaust port (9) extends from the cylinder (7) to the exhaust pipe;

The air equalizing mechanism is arranged in the air intake pipe (2), and is used to keep the mixed gas in the crankcase (3) uniform during intake, and the air equalizing mechanism includes a support frame (21), An air inlet groove (22) is provided on the support frame (21);

The stirring part (43) is arranged on the crank arm (42) of the crankshaft (4), and is used for stirring the mixed gas in the crankcase (3).

2 . The universal dual-cylinder opposed engine according to claim 1 , wherein the gas equalization mechanism comprises an oil blocking portion ( 23 ), and the oil blocking portion ( 23 ) is arranged on the support frame. 3 . (21).

3. A general-purpose two-cylinder opposed engine according to claim 1, characterized in that: each side surface of the support frame (21) is inclined outward from the top, and the air intake grooves (22) are provided in the On each side of the support frame (21), the bottom of the support frame (21) is communicated with the air inlet valve (1), and the support frame (21) is in a tower shape.

4. A universal dual-cylinder opposed engine according to claim 2, characterized in that: the oil blocking part (23) is arranged on the top of the support frame (21), and the oil blocking part (23) 23) Inverted cone.

5. A general-purpose two-cylinder opposed engine according to claim 1, characterized in that: the stirring part (42) comprises a first end (431) and a second end (432), the first end (432) One end portion (431) is provided on one side of the crank arm (42), and the second end portion (432) extends to the other side of the crank arm (42).

6 . The universal dual-cylinder opposed engine according to claim 1 , wherein the exhaust pipe comprises an exhaust upper pipe (10) and an exhaust lower pipe (11) arranged in sequence, and the exhaust pipe The exhaust port (9) runs through the exhaust upper pipe (10), and the width of the exhaust port (9) gradually expands from the cylinder (7) to the exhaust upper pipe (10).

7. A general-purpose two-cylinder opposed engine according to claim 6, characterized in that: the exhaust port (9) comprises a first inner wall (91) and an inclination toward the first inner wall (91) A second inner wall (92), a third inner wall (93) is arranged under the second inner wall (92), the third inner wall (93) has an arc, and the first inner wall (91) is connected to the first inner wall (91). The second inner wall (92) and the third inner wall (93) are smoothly connected.

8. A general-purpose dual-cylinder opposed engine according to claim 7, characterized in that: a support piece (94) is provided at the inlet of the exhaust upper pipe (10), and under the exhaust gas A muffler portion (111) is provided in the pipe (11).

9. A general-purpose dual-cylinder opposed engine according to claim 1, characterized in that: a piston groove (51) is provided around the piston (5), and a piston groove (51) is provided in the piston groove (51). Has piston rings.

10. A general-purpose two-cylinder opposed engine according to claim 9, characterized in that: the piston groove (51) is provided on the side close to the head of the piston (5), and the piston groove (51) 51) At least one is provided, the end of the piston groove (51) away from the head is perpendicular to the end face of the piston (5), and the other end of the piston groove (51) is from the bottom of the groove to the groove. The outside is inclined, and the piston groove (51) and the piston ring are both trapezoidal at right angles.