CN108982112B - Optical engine - Google Patents

Abstract

The invention relates to the technical field of engines, in particular to an optical engine, comprising a cylinder head assembly (6), a transparent cylinder liner (7), an elongated piston (8), and a cylinder block (3), the cylinder head assembly ( 6) It is fixed on the upper end of the transparent cylinder liner (7), and the cylinder head assembly (6) is sealedly connected with the transparent cylinder liner (7). 8) The oil leaked at the upper end position is introduced into the guide channel (23) in the cylinder block (3), and the upper guide port (24) of the guide channel (23) is located under the first piston ring (22). side. The oil leaked from the upper end of the elongated piston of the optical engine can be introduced into the cylinder, so as to prevent the 45° reflector from being polluted, thereby improving the accuracy of the experimental data.

Description

an optical engine

technical field

The invention relates to the technical field of engines, in particular to an optical engine.

Background technique

Optical engines are mainly used to study the flow of air in the engine cylinder, the development of spray, the formation of mixed gas, and the combustion process. The optical engine generally includes parts such as cylinder block, support plate, elongated piston, transparent cylinder liner, cylinder head strut and cylinder head. One end is sealedly connected with the cylinder head, the upper end of the elongated piston is slidably connected with the transparent cylinder liner, and the lower end of the elongated piston is slidably connected with the cylinder body. The elongated piston includes an upper piston piece and a lower piston that are fixedly connected from top to bottom. A transparent glass as large as possible is arranged on the top surface of the upper piston piece. The 45° reflector is installed in the mouth, and the image is captured by the transparent glass set on the piston head and the 45° reflector installed below, and the shooting device is set at the outer end of the transparent cylinder liner, so that the flow field, spray, combustion and The formation of mixed gas was experimentally studied.

When the optical engine in the above structure is working, generally there is only one transparent cylinder liner, that is to say, the structure of a single cylinder operates. In this way, when the optical engine is working, due to the inertial force when the elongated piston moves up and down, vibration is generated. On the one hand, this vibration effect will affect the experimental data acquisition of the optical engine, resulting in low experimental data accuracy. On the other hand, the transparent cylinder liner is generally made of brittle quartz material. It is easy to collide with foreign matter and cause rupture.

In addition, in the optical engine of the prior art, the transparent cylinder liner is generally supported by a screw fixing member so that the transparent cylinder liner is pressed against the cylinder head. However, when the screw fixing member is installed, it is generally necessary to tighten multiple screws. In this way, when multiple screws are tightened more or less, there will be a shortage of uneven force on the transparent cylinder liner. This uneven force combined with the vibration generated when the optical engine is working can easily cause cracks.

Third, the cylinder head in the optical engine of the prior art is directly connected with the cylinder head pillar screws, and the cylinder head actually includes many parts. When cleaning the optical engine every time it is disassembled and assembled, the cylinder head needs to be disassembled after being disassembled. It can only be installed on the cylinder head strut, causing trouble in disassembly and assembly.

Fourth, in the optical engine of the prior art, the upper end of the elongated piston is slidably connected to the transparent cylinder liner, oil needs to be provided between the upper end of the elongated piston and the transparent cylinder liner, and there is a constant connection between the upper end of the elongated piston and the transparent cylinder liner. The up and down movement will cause the oil to leak down along the gap between the elongated piston and the transparent cylinder liner, and the leaked oil will drip from the transparent cylinder liner under the action of gravity or other forces, which will easily cause the 45° reflector in the middle of the elongated piston to be affected. pollution, which affects the acquisition of data.

Fifth, the lower end of the elongated piston in the prior art optical engine continuously moves up and down relative to the cylinder block. Since there is organic oil inside the cylinder block for cooling and lubrication, the lower end of the elongated piston and the bottom cylinder liner are constantly moved up and down. Movement will cause the oil to gather at the lower end of the piston ring. If the oil gathers too much, it will easily leak upward from the gap between the elongated piston and the bottom cylinder liner, causing the problem of oil leakage to the outside, and it is easy to make the transparent glass and 45° reflector. It is polluted, which affects the acquisition of data, thereby affecting the accuracy of test data, and affecting the normal test and experimental work of the optical engine.

SUMMARY OF THE INVENTION

The present invention aims to solve at least one of the above-mentioned technical problems.

The technical problem to be solved by the present invention is to provide at least an optical engine, the oil leaked from the upper end of the elongated piston of the optical engine can be introduced into the cylinder, so as to prevent the 45° reflector from being polluted, thereby improving the accuracy of experimental data.

In order to solve the above problems, an optical engine of the present invention includes a cylinder head assembly, a transparent cylinder liner, an elongated piston, and a cylinder block, the cylinder head assembly is fixed on the upper end of the transparent cylinder liner, and the cylinder head assembly is sealed with the transparent cylinder liner. , the upper end of the elongated piston is slidably connected to the transparent cylinder liner, the lower end of the elongated piston is slidably connected to the cylinder body, the side wall of the upper end of the elongated piston is provided with a first piston ring, and the side wall of the elongated piston is A guide channel is provided for guiding the oil leaked from the upper end position of the elongated piston into the cylinder, and the upper guide port of the guide channel is located on the lower side of the first piston ring.

The above structure has at least the following advantages: when the optical engine starts and works, if the oil leaks from the first piston ring, the leaked oil can flow into the guide channel from the upper guide port under the action of gravity or other forces , and then introduced into the cylinder, on the one hand, it can prevent the oil from dripping from the transparent cylinder liner, and avoid the contamination of the 45° reflector located in the middle of the elongated piston, which will affect the acquisition of data, and ensure the data accuracy of the optical engine; on the other hand, the oil No dripping from the transparent cylinder liner can ensure the cleanliness of the optical engine; moreover, the oil can be introduced into the cylinder for use, avoiding the waste of oil. That is to say, it has the advantages of ensuring data accuracy and avoiding waste, has beneficial technical effects, and has significant progress.

Preferably, a first sinking step is provided on the side wall of the upper end of the elongated piston and is located on the lower side of the first piston ring, the first sinking step and the inner peripheral wall of the transparent cylinder liner have an interval, and the interval forms A first oil storage ring groove for storing leaked oil, and the upper guide port is communicated with the first oil storage ring groove. Combined with the above structural features, the leaked oil can be stored in the first oil storage ring groove, so that when there are many leaks, the upper diversion port is insufficient and leaks downward, which can further ensure that the leaked oil is completely It is guided into the guide channel from the upper guide port, and then guided into the cylinder.

Preferably, a second piston ring is provided on the side wall of the upper end of the elongated piston and on the lower side of the first oil storage ring groove. Combined with the above structural features, the second piston ring can prevent the oil in the first oil storage ring groove from continuing to leak downward, thereby further ensuring that the leaked oil is guided from the upper diversion port into the diversion channel, and then into the cylinder.

Preferably, a third piston ring is provided on the side wall of the lower end of the elongated piston, and a lower guide port for guiding the oil at the lower end of the third piston ring into the guide channel is arranged on the side wall of the lower end of the elongated piston, so The lower guide port is located on the lower side of the third piston ring, and the lower guide port is communicated with the guide channel. When more oil accumulates at the lower end of the third piston ring, it is easy to leak upward from the third piston ring. After combining the above structural features, if more oil accumulates at the lower end of the third piston ring, it can be Under the action of gravity or other forces, it flows into the guide channel from the lower guide port, and then is introduced into the cylinder. On the one hand, it can prevent the oil from spilling from the leakage to the 45° reflector, and ensure the data accuracy of the optical engine.

Preferably, the lower guide port is inclined downward from the outside to the inside. Combined with this structural feature, the oil is easier to flow into the guide channel from the lower guide port under the action of gravity or other forces.

Preferably, the upper diversion port is inclined downward from the outside to the inside. Combined with this structural feature, it is easier for the oil to flow into the guide channel from the upper guide port under the action of gravity or other forces.

Preferably, the elongated piston includes an upper piston member and a bottom piston, and the upper piston member is fixedly connected to the bottom piston; the diversion channel includes a first channel section provided on the side wall of the upper piston member and a first channel section provided on the bottom The second channel section on the side wall of the piston, the upper end face of the bottom piston is provided with an annular oil storage tank, the first channel section communicates with the annular oil storage tank, and the second channel section communicates with the annular oil storage tank. The function of the annular oil storage tank is to temporarily store the oil and further improve the overall drainage capacity of the diversion channel. It is not necessary to align the first channel section with the second channel section, so as to facilitate assembly, and after the elongated piston is divided into the upper piston part and the bottom piston, it is also convenient to process the first channel section, the second channel section, the upper guide port, and the lower guide. Mouth.

Preferably, the upper piston member includes an upper piston sleeve, a transparent glass, and a press cover; an installation cavity is provided on the upper end of the upper piston sleeve, the transparent glass is located in the installation cavity, and the transparent glass has a pressing a step, the gland is screwed with the upper piston sleeve body and the end of the gland is tightly connected with the abutting step, a sealing gasket is arranged between the transparent glass and the bottom of the installation cavity, the gland A sealing gasket is provided between the end of the clasp and the abutting step. After combining these structural features, the gland can be loosened, and then the transparent glass can be conveniently taken out from the installation cavity, so that the transparent glass can be easily disassembled and assembled when cleaning the transparent glass.

Description of drawings

FIG. 1 is a schematic diagram of one embodiment of the present application.

FIG. 2 is a schematic diagram of the balance box of the present application.

FIG. 3 is a schematic diagram of the first balance shaft and the second balance shaft of the present application.

FIG. 4 is a schematic view of the position of the cylinder head assembly of the present application.

FIG. 5 is a schematic cross-sectional view of the position of the elongated piston of the present application.

FIG. 6 is another schematic cross-sectional view at the position of the elongated piston of the present application.

FIG. 7 is an enlarged schematic view of A in FIG. 6 .

FIG. 8 is an enlarged schematic view of B in FIG. 6 .

FIG. 9 is an enlarged schematic view of C in FIG. 6 .

Figure 10 is a schematic view of the bottom piston.

in:

1. Crankcase; 2. Crankshaft; 3. Cylinder block; 4. First support plate; 5. Cylinder head strut; 6. Cylinder head assembly; 7. Transparent cylinder liner; 8. Extended piston; 9. Connecting rod; 10, balance box; 11, first balance shaft; 12, second balance shaft; 13, belt; 14, eccentric weight; 15, hydraulic cylinder; 16, hydraulic cylinder support block; 17, second support plate; 18. Positioning ring groove; 19. Single-cylinder cylinder head; 20. Mounting frame; 21. Mounting flange; 22. First piston ring; 23. Diversion channel; 24. Upper diversion port; 25. Second oil storage Ring groove; 26, the first oil storage ring groove; 27, the second piston ring; 28, the third piston ring; 29, the lower guide port; 30, the upper piston part; 31, the bottom piston; 32, the first passage section 33, the second channel section; 34, the annular oil storage tank; 35, the upper piston casing; 36, the transparent glass; 37, the gland;

Detailed ways

The inventive concepts of the present disclosure will be described below using terms commonly used by those skilled in the art to convey the substance of their work to others skilled in the art. These inventive concepts may, however, be embodied in many different forms and should not be construed as limited to the embodiments described herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of their inclusion to those skilled in the art. It should also be noted that these embodiments are not mutually exclusive. A component, step or element from one embodiment may be assumed to be present or used in another embodiment. The specific embodiments shown and described may be replaced by a wide variety of alternative and/or equivalent implementations without departing from the scope of the embodiments of the present disclosure. This application is intended to cover any adaptations or variations of the embodiments discussed herein. It will be apparent to those skilled in the art that alternative embodiments may be practiced using only some of the described aspects. Specific numbers, materials, and configurations are described herein in the embodiments for purposes of illustration, however, alternative embodiments may be practiced by those skilled in the art without these specific details. In other instances, well-known features may be omitted or simplified in order not to obscure the illustrative embodiments.

Furthermore, the terms "first", "second", and "third" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In the description of the present invention, it should be noted that, unless otherwise expressly specified and limited, the terms "provided", "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection, It can also be a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or the internal communication between two components; the term "fixed" can be It is bolt-fixed connection and/or screw-fixed connection and/or snap connection and/or welding, and those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention under specific circumstances.

1-10, in one embodiment, an optical engine comprising

A crankcase 1, a crankshaft 2 is rotatably connected in the crankcase 1;

Cylinder block 3, the cylinder block 3 is fixed on the crankcase body 1;

a first support plate 4, the first support plate 4 is fixed on the upper end of the cylinder block 3;

Cylinder head struts 5, the cylinder head struts 5 are fixed on the first support plate 4;

The cylinder head assembly 6, the cylinder head assembly 6 is fixed on the cylinder head strut 5;

The transparent cylinder liner 7, the top of the transparent cylinder liner 7 is in close contact with the cylinder head assembly 6; the cylinder head assembly 6 is fixed on the upper end of the transparent cylinder liner 7, and the cylinder head assembly 6 is sealedly connected with the transparent cylinder liner 7,

a support assembly for supporting the transparent cylinder liner 7, and the bottom of the transparent cylinder liner 7 is supported by the support assembly;

lengthening piston 8, the upper end of the lengthening piston 8 is slidingly connected with the transparent cylinder liner 7, and the lower end of the lengthening piston 8 is slidingly connected with the cylinder body 3;

connecting rod 9, one end of the connecting rod 9 is hinged with the extension piston 8, and the other end of the connecting rod 9 is hinged with the crankshaft 2;

Also includes

A balance box 10, the crankcase 1 is fixed on the balance box 10, and the balance box 10 is rotatably connected with a first balance shaft 11 and a second balance shaft 12, the first balance shaft 11, the second balance shaft 12 The two balance shafts 12 and the crankshaft 2 are connected by a belt 13. Eccentric weights 14 are provided on the first balance shaft 11 and the second balance shaft 12. The first balance shaft 11 and the second balance shaft 12 , and the rotational speed of the crankshaft 2 is the same, the steering of the first balance shaft 11 and the second balance shaft 12 is opposite; when the elongated piston 8 moves from bottom to top, the first balance shaft 11 and the second balance shaft 12 The eccentric weights 14 all move from top to bottom. When the elongated piston 8 moves from top to bottom, the eccentric weights 14 on the first balance shaft 11 and the second balance shaft 12 move from bottom to top. .

When the optical engine is working, the movement of the elongated piston 8 drives the crankshaft 2 to move, and the movement of the crankshaft 2 drives the first balance shaft 11 and the second balance shaft 12 to move; and when the elongated piston 8 moves from bottom to top, the first balance shaft 11 and the eccentric weights 14 on the second balance shaft 12 all move from top to bottom, so that the inertial force of the elongated piston 8 moving from bottom to top is balanced by the inertial force of the eccentric weights 14 moving from top to bottom. ; When the lengthening piston 8 moves from top to bottom, the eccentric weights 14 on the first balance shaft 11 and the second balance shaft 12 move from bottom to top, so that the lengthening piston 8 moves from top to bottom. The inertial force is balanced by the inertial force of the eccentric weight 14 moving from bottom to top. Therefore, when the optical engine is working, the inertial force of the entire movement process of the elongated piston 8 can be balanced, which can effectively reduce the up and down movement of the elongated piston 8. The vibration generated by the inertial force has the advantage of stable operation. In addition, due to the reduced vibration, the accuracy of the experimental data of the optical engine can be effectively improved, laying a foundation for scientific research. In addition, the rotation of the first balance shaft 11 and the second balance shaft 12 are opposite, so that when the eccentric weight 14 is in the horizontal direction, the inertial forces of the eccentric weights 14 can be balanced with each other, so that no additional vibration will be generated and the optical engine will work. Operates under low vibration conditions. In addition, the first balance shaft 11 and the second balance shaft 12 are driven by the crankshaft 2, which can ensure the timing characteristics of the first balance shaft 11 and the second balance shaft 12, and the structure is simple, and the transmission stability can be ensured through the belt and the transmission wheel. , it can be said that the effect of reducing the vibration of the optical engine is achieved by adopting a relatively simple structure.

The first balance shaft 11 and the second balance shaft 12 have the same structure, and the eccentric weight block 14 on the first balance shaft 11 and the eccentric weight block 14 on the second balance shaft 12 have the same structure. This can further ensure that the eccentric weights 14 on the first balance shaft 11 and the eccentric weights 14 on the second balance shaft 12 self-balance and balance the inertial force of the elongated piston 8 during rotation.

The axis of the elongated piston 8 is located at the center of the first balance shaft 11 and the second balance shaft 12 . This can further ensure that the eccentric weight 14 on the first balance shaft 11 and the eccentric weight 14 on the second balance shaft 12 balance the inertial force of the elongated piston 8 when rotating.

The support assembly includes a hydraulic cylinder 15 , a hydraulic cylinder support block 16 and a second support plate 17 , the hydraulic cylinder support block 16 is fixed on the first support plate 4 , and the hydraulic cylinder 15 is fixed on the hydraulic cylinder support block 16 , the second support plate 17 is fixed on the driving end of the hydraulic cylinder 15 , and the bottom of the transparent cylinder liner 7 is supported by the support assembly means that the bottom of the transparent cylinder liner 7 is supported by the second support plate 17 . In this way, the structure of supporting the transparent cylinder liner 7 by the screw fixing member in the prior art is changed, and the hydraulic cylinder 15 is used as a bearing, the hydraulic cylinder 15 can ensure the uniform force received by the bottom of the transparent cylinder liner 7, and the screw fixing member is avoided. There is a shortage of uneven force, so as to ensure that the optical engine is not easily damaged by vibration when it is working. The hydraulic cylinder 15 is specifically a hollow hydraulic cylinder on the market, and its hollow position can give way to the extension piston 8 .

The second support plate 17 is provided with a positioning ring groove 18 for positioning the transparent cylinder liner 7 , and the bottom of the transparent cylinder liner 7 is located in the positioning ring groove 18 . In this way, during assembly, the transparent cylinder liner 7 and the second support plate 17 can be easily installed.

The cylinder head assembly 6 includes a single-cylinder cylinder head 19 and a mounting frame 20, the single-cylinder cylinder head 19 is fixedly connected with the mounting frame 20, and the mounting frame 20 is provided with a mounting flange 21, and the mounting flange 21 It is fixedly connected with the cylinder head strut 5 by means of screws. In this way, during disassembly and assembly, the entire cylinder head assembly 6 can be disassembled and assembled by directly tightening or loosening the mounting flange 21 and the cylinder head strut 5 , which facilitates disassembly and assembly when cleaning the transparent cylinder liner 7 .

The side wall of the upper end of the elongated piston 8 is provided with a first piston ring 22 , and the side wall of the elongated piston 8 is provided with a guide channel for guiding the oil leaked from the upper end of the elongated piston 8 into the cylinder block 3 . 23 , the upper guide port 24 of the guide channel 23 is located on the lower side of the first piston ring 22 .

When the optical engine starts and works, if the oil leaks from the first piston ring 22 , the leaked oil can flow into the guide channel 23 from the upper guide port 24 under the action of gravity or other forces, and then be introduced into the cylinder block 3 On the one hand, it can prevent the oil from dripping from the transparent cylinder liner 7, avoid the contamination of the 45° reflector located in the middle of the elongated piston 8 and the acquisition of hard data, and ensure the data accuracy of the optical engine; on the other hand, the oil does not flow from the transparent cylinder. The cover 7 is dropped so that the cleanliness of the optical engine can be ensured; moreover, the oil can be introduced into the cylinder block 3 for use, avoiding the waste of oil. That is to say, it has the advantages of ensuring data accuracy and avoiding waste, has beneficial technical effects, and has significant progress.

A first oil storage ring groove 26 is provided on the side wall of the upper end of the elongated piston 8 and located on the lower side of the first piston ring 22 , and the upper guide port 24 communicates with the first oil storage ring groove 26 . Combined with the above structural features, the leaked oil can be stored in the first oil storage ring groove 26, so as to prevent the upper diversion port 24 from leaking downward due to insufficient diversion when there is a lot of leakage, which can further ensure that the leaked oil is leaked. The oil is guided into the guide passage 23 from the upper guide port 24 and then into the cylinder block 3 .

A second piston ring 27 is provided on the side wall of the upper end of the elongated piston 8 and located on the lower side of the first oil storage ring groove 26 . Combined with the above structural features, the second piston ring 27 can prevent the oil in the first oil storage ring groove 26 from continuing to leak downward, thereby further ensuring that the leaked oil is guided from the upper guide port 24 into the guide. The passage 23 is then introduced into the cylinder 3 .

The side wall of the lower end of the elongated piston 8 is provided with a third piston ring 28 , and the side wall of the lower end of the elongated piston 8 has a lower guide port for guiding the oil at the lower end of the third piston ring 28 into the guide channel 23 . 29 , the lower guide port 29 is located on the lower side of the third piston ring 28 , and the lower guide port 29 communicates with the guide channel 23 . When more oil accumulates at the lower end of the third piston ring 28 , it will easily leak upward from the third piston ring 28 . When combined with the above structural features, if more oil accumulates at the lower end of the third piston ring 28 At the time, it can flow into the guide channel 23 from the lower guide port 29 under the action of gravity or other forces, and then be introduced into the cylinder block 3, on the one hand, it can prevent the oil from spilling from the leakage to the 45° reflector, and ensure the optical engine. data precision.

A second oil storage ring groove 25 is provided on the side wall of the lower end of the elongated piston 8 and located on the lower side of the third piston ring 28 , and the lower guide port 29 communicates with the second oil storage ring groove 25 . In this way, the second oil storage ring groove 25 can temporarily store the oil, which facilitates the oil to flow into the guide passage 23 from the lower guide port 29 and then be introduced into the cylinder block 3 .

The lower guide opening 29 is inclined downward from the outside to the inside. Combined with this structural feature, the oil is easier to flow into the guide channel 23 from the lower guide port 29 under the action of gravity or other forces.

The upper guide opening 24 is inclined downward from the outside to the inside. Combined with this structural feature, the oil is easier to flow into the guide channel 23 from the upper guide port 24 under the action of gravity or other forces.

The elongated piston 8 includes an upper piston member 30 and a bottom piston 31 , and the upper piston member 30 is fixedly connected with the bottom piston 31 ; the guide channel 23 includes a first channel section provided on the side wall of the upper piston member 30 32 and a second channel section 33 provided on the side wall of the bottom piston 31, an annular oil storage tank 34 is provided on the upward end face of the bottom piston 31, and the first channel section 32 is communicated with the annular oil storage tank 34, so The second passage section 33 communicates with the annular oil storage tank 34 . The role of the annular oil storage tank 34 is to temporarily store the oil, further improving the overall drainage capacity of the diversion channel 23; on the other hand, after the elongated piston 8 is divided into the upper piston member 30 and the bottom piston 31, there is an annular oil storage tank 34. Therefore, it is not necessary to align the first channel section 32 with the second channel section 33 during assembly, so as to facilitate assembly, and after the elongated piston 8 is divided into the upper piston part 30 and the bottom piston 31, it is also convenient to process the first channel section 32, the second Two channel segments 33 , the upper guide port 24 , and the lower guide port 29 . The third piston ring 28 and the lower guide port 29 are provided at the lower end of the upper piston member 30 .

The number of the guide channel 23 , the first channel segment 32 , the second channel segment 33 , the upper guide port 24 , and the lower guide port 29 can be one or more, for example, 2, 3, or 4 can be .

The upper piston member 30 includes an upper piston sleeve body 35, a transparent glass 36, and a press cover 37; the upper end of the upper piston sleeve body 35 is provided with an installation cavity 38, and the transparent glass 36 is located in the installation cavity 38. The transparent glass 36 has a pressing step 39 , the gland 37 is screwed with the upper piston casing 35 and the end of the pressing cover 37 is tightly connected with the pressing step 39 , and the transparent glass 36 is connected to the mounting cavity 38 . A sealing gasket 40 is provided between the bottoms, and a sealing gasket 40 is provided between the end of the gland 37 and the abutting step 39 . The accommodating chamber for mounting the 45° reflector is also provided on the upper piston member 30 . After combining these structural features, the pressing cover 37 is loosened, and then the transparent glass 36 can be easily taken out from the installation cavity 38, so that the transparent glass 36 can be easily disassembled and assembled when cleaning.

The balance structure in the balance box 10 can be a first-order balance, a second-order balance or a single-axis balance, etc. The number of balance shafts can be single-axis or multi-axis to achieve the balance effect, so it is also within the scope of protection.

The above are only examples of preferred implementations of the present invention, and therefore cannot limit the scope of rights of the present invention. For those skilled in the art, any other All corresponding changes should fall within the protection scope of the claims of the present invention.

Claims (8)

1. An optical engine, comprising a cylinder head assembly (6), a transparent cylinder liner (7), an elongated piston (8), and a cylinder block (3), the cylinder head assembly (6) being fixed on the upper end of the transparent cylinder liner (7) , the cylinder head assembly (6) is sealingly connected to the transparent cylinder liner (7), the upper end of the elongated piston (8) is slidably connected to the transparent cylinder liner (7), and the lower end of the elongated piston (8) is connected to the cylinder body (3) ) sliding connection, a first piston ring (22) is arranged on the side wall of the upper end of the elongated piston (8), characterized in that the sidewall of the elongated piston (8) is provided with The oil leaked at the upper end of the cylinder block (3) is introduced into the guide channel (23) in the cylinder block (3), and the upper guide port (24) of the guide channel (23) is located on the lower side of the first piston ring (22), The elongated piston (8) includes an upper piston member (30) and a bottom piston (31), the upper piston member (30) is fixedly connected with the bottom piston (31); the guide channel (23) includes a A first channel section (32) on the side wall of the piston member (30) and a second channel section (33) provided on the side wall of the bottom piston (31), the end face of the bottom piston (31) facing upwards An annular oil storage tank (34) is provided, the first passage section (32) is communicated with the annular oil storage slot (34), and the second passage section (33) is communicated with the annular oil storage slot (34). 2. The optical engine according to claim 1, characterized in that, a first oil storage ring groove (26) is provided on the side wall of the upper end of the elongated piston (8) and located on the lower side of the first piston ring (22). ), the upper guide port (24) communicates with the first oil storage ring groove (26). 3 . The optical engine according to claim 2 , wherein a second piston ring ( 27 ) is provided on the side wall of the upper end of the elongated piston ( 8 ) and on the lower side of the first oil storage ring groove ( 26 ). 4 . . 4. The optical engine according to claim 1, characterized in that, a third piston ring (28) is provided on the side wall of the lower end of the elongated piston (8), and a third piston ring (28) is provided on the side wall of the lower end of the elongated piston (8). There is a lower guide port (29) for guiding the oil at the lower end of the third piston ring (28) into the guide channel (23), the lower guide port (29) is located on the lower side of the third piston ring (28) , the lower guide port (29) communicates with the guide channel (23). 5. The optical engine according to claim 4, characterized in that, a second oil storage ring groove (25) is provided on the side wall of the lower end of the elongated piston (8) and located on the lower side of the third piston ring (28). ), the lower guide port (29) communicates with the second oil storage ring groove (25). 6 . The optical engine according to claim 4 , wherein the lower guide port ( 29 ) is inclined downward from the outside to the inside. 7 . 7 . The optical engine according to claim 1 , wherein the upper flow guide port ( 24 ) is inclined downward from outside to inside. 8 . 8. The optical engine according to claim 1, wherein the upper piston member (30) comprises an upper piston casing (35), a transparent glass (36), and a gland (37); the upper piston The upper end of the sleeve body (35) is provided with an installation cavity (38), the transparent glass (36) is located in the installation cavity (38), the transparent glass (36) has a pressing step (39), the gland (36) 37) is threadedly connected with the upper piston sleeve body (35) and the end of the gland (37) is tightly connected with the abutting step (39), the transparent glass (36) is connected to the bottom of the mounting cavity (38). A sealing gasket (40) is arranged therebetween, and a sealing gasket (40) is arranged between the end of the gland (37) and the pressing step (39).

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