CN108051219B - Reciprocating motion simulation mechanism of internal combustion engine with variable crank radius - Google Patents
Reciprocating motion simulation mechanism of internal combustion engine with variable crank radius Download PDFInfo
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- CN108051219B CN108051219B CN201711021865.6A CN201711021865A CN108051219B CN 108051219 B CN108051219 B CN 108051219B CN 201711021865 A CN201711021865 A CN 201711021865A CN 108051219 B CN108051219 B CN 108051219B
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Abstract
The invention relates to a reciprocating motion simulation mechanism with a variable crank radius, belonging to the field of reciprocating motion simulation mechanisms of internal combustion engines. The crank length adjusting device comprises a crank length adjusting device and a variable crank connecting rod mechanism, and is used for realizing reciprocating motion and crank length adjustment; the ejector rod is provided with an installation platform and is used for copying the motion law of the small end of the connecting rod to the test piece installation platform; the frame comprises a mandril guide mechanism and is used for supporting all the components; the power device comprises a servo motor and matched equipment and is used for providing power. The reciprocating motion simulation mechanism drives the variable crank connecting rod mechanism to move through the motor, and finally drives the ejector rod mechanism to reciprocate up and down. The invention has high simulation precision and strong universality, can dynamically simulate the high-speed reciprocating motion in the internal combustion engine and provides a basis for the relevant research of the piston of the internal combustion engine.
Description
Technical Field
The invention relates to a reciprocating motion simulation mechanism of an internal combustion engine with a variable crank radius, belonging to the field of reciprocating motion simulation mechanisms of internal combustion engines.
Background
With the increasing explosion pressure and the increasing power in the cylinder of the internal combustion engine in recent years, the heat load and the mechanical load of the piston of the internal combustion engine are greatly increased. In order to prevent the piston from failing and ensure the reliability and durability of the piston and the diesel engine, the maximum temperature of the piston must be controlled below an allowable value. Effective cooling of the piston is therefore required, and the cooling method which is widely used at present on the high-load piston is forced oscillation cooling of the inner cooling oil passage. Whether measuring piston temperature distribution or studying internal cooling oil cavity flow heat transfer, a mechanism that can accurately simulate the reciprocating motion device inside the internal combustion engine, i.e., a mechanism that provides reciprocating motion, is needed.
At present, no universal internal combustion engine reciprocating motion simulation mechanism can conveniently and accurately simulate reciprocating motion.
Examples of the development of the reciprocating motion simulation mechanism are: chinese patent application 200910047582.8 discloses a piston oscillation cooling simulation experiment device and an experiment method thereof. The motor drives the rotary disc to rotate, the rotary disc is hinged with the connecting rod, and the connecting rod drives the bracket to simulate the reciprocating motion of the internal combustion engine under the limitation of the guide rail.
But the radius of the crank of the device can not be adjusted in a stepless way, and the universality is small; the guide rail used by the reciprocating mechanism causes difficulty in arrangement of other experimental accessories, for example, an engine oil collecting device is difficult to arrange when oil is sprayed and cooled, so that engine oil at an engine oil inlet splashes around and cannot be collected; in addition, the device does not consider lubrication of the guide rail and the high-speed reciprocating mechanism, and also does not consider vibration caused by high-speed dynamic unbalance.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the reciprocating motion simulation mechanism of the internal combustion engine with the variable crank radius is provided, and can accurately simulate the reciprocating motion of a piston of the internal combustion engine; the device has stronger universality, namely the motion of the crank connecting rod in a certain size range can be simulated; it is also convenient for the arrangement of accessories such as an oil collecting device and the like and the lubrication of a moving mechanism; the device can simulate the reciprocating motion of the internal combustion engine universally, accurately and conveniently.
The technical scheme adopted by the invention is as follows: a reciprocating motion simulation mechanism of an internal combustion engine with a variable crank radius comprises a frame 1, a crank length adjusting device 2, a test piece mounting platform 3, a mandril guide mechanism 5, a connecting rod 6, a variable crank connecting rod mechanism 7, a mandril 4, a power device 8 and a right main journal 9;
the left side, the right side and the upper part of a frame 1 are respectively provided with a mounting hole, a crank length adjusting device 2 passes through the mounting hole on the left side of the frame 1 and then is connected with the left side of a variable crank link mechanism 7 in the frame 1, a right main journal 9 passes through the mounting hole on the right side of the frame 1 and then is connected with the right side of the variable crank link mechanism 7, the right main journal 9 is axially fixed by the frame 1, a power device 8 is connected with the right main journal 9, a mandril guide mechanism 5 is arranged at the mounting hole on the upper side of the frame 1, a test piece mounting platform 3 is fixed right above the frame 1, the upper end of a mandril 4 is connected with the test piece mounting platform 3, the lower end passes through the guide mechanism 5 and then is connected with the upper end of a connecting rod 6 in the frame 1, the lower end of the connecting rod 6 is connected with the upper end of the variable crank link mechanism 7, the power device 8, the crank length adjustment device 2 is used to achieve length adjustment of the variable crank link mechanism 7.
The crank length adjusting device 2 comprises a hand wheel 17, a sliding screw 18, a nut 19, a bearing 15, a thrust retainer ring or a double-nut fixed standard part 16 and a sleeve 14; the sleeve 14 is installed in a mounting hole on the left side of the frame 1, the bearing 15 is installed inside the sleeve 14, the nut 19 is installed on the inner ring of the bearing 15 and is axially fixed, the thrust retainer ring or double-nut fixing standard part 16 is fixed on the nut 19, the sliding screw 18 is in threaded connection with the inner wall of the nut 19, the left end of the sliding screw 18 is connected with the hand wheel 17, the right end of the sliding screw is connected with the left end of the variable crank-link mechanism 7, and the axial position of the sliding screw 18 is changed by rotating the hand wheel 17, so that the variable crank-link mechanism 7 is pushed.
The variable crank connecting rod mechanism 7 comprises a left crank 13, a connecting rod journal 12 and a right crank 11, wherein the left end of the left crank 13 is connected with the crank length adjusting device 2, the right end of the left crank 13 is connected with the left end of the connecting rod journal 12, the right end of the connecting rod journal 12 is connected with the left end of the right crank 11, the right end of the right crank 11 is connected with the right main journal 9, and the middle part of the connecting rod journal 12 is connected with the connecting rod 6 above.
The variable crank link mechanism 7 further comprises vibration balance devices 10 at the left end and the right end, the left end of the vibration balance device 10 at the left end is connected with the crank length adjusting device 2, the right end of the vibration balance device 10 at the left end is connected with the left end of the left crank 13, the left end of the vibration balance device 10 at the right end is connected with the right end of the right crank 11, and the right end of the vibration balance device 10 at the right end is connected with the right main journal 9.
The vibration balance device 10 comprises a disc fixed on the crankshafts of the left crank 13 and the right crank 11 and a balance weight fixed on the disc.
The vibration balance device 10 at the left end, the left crank 13, the connecting rod journal 12, the right crank 11 and the vibration balance device 10 at the right end are hinged with each other, so that the length change of the actual variable crank-connecting rod mechanism 7 can be realized when the hand wheel 17 is rotated.
The ejector rod guide mechanism 5 comprises an ejector rod sleeve 20 and an ejector rod sleeve seat 21, the ejector rod sleeve seat 21 is located at a mounting hole in the upper portion of the rack 1, the ejector rod sleeve 20 is mounted inside the ejector rod sleeve seat 21, the lower end of the ejector rod 4 penetrates through the ejector rod sleeve 20 and then extends into the rack 1, the ejector rod 4 freely slides in the ejector rod sleeve 20, a connecting lug is arranged at the lower end of the ejector rod 4 and provided with a pin hole, the upper end of the connecting rod 6 is a small connecting rod head, the lower end of the connecting rod is a large connecting rod head, the small connecting rod head is provided with a pin hole, the connecting rod 6 is rotatably connected with the ejector rod 4 by penetrating through the pin hole in the connecting lug and the pin hole in the small connecting rod head through a pin, and the large connecting rod.
The power device 8 is a servo motor, and a motor power input shaft 22 of the servo motor is connected with the right main journal 9.
The shaft of the sliding screw 18 is provided with a crank radius scale value which is used for determining the radius of a crank in the current variable crank connecting rod mechanism 7.
The variable crank link mechanism 7 is partially immersed in an oil sump or splash-lubricated by an oil slinger attached to the variable crank link mechanism 7.
The principle of the design of the invention is as follows: the variable crank-link mechanism 7 is driven by the power device 8 to drive the whole ejector rod 4 to do up-and-down reciprocating motion under the restraint of the guide mechanism of the frame 1, and the test piece can be fixed on the test piece mounting platform 3 on the ejector rod 4, so that the variable crank-link mechanism 7 is separated from an observed test piece (an internal cooling oil cavity model), and an oil duct engine oil collecting device can be conveniently arranged, and the variable crank-link mechanism 7 and the like can be lubricated; the stepless adjustment of the axial position of the crank length adjusting device 2 is realized through sliding screw transmission, and further the stepless adjustment of the length of the variable crank connecting rod mechanism 7 is realized; the huge vibration caused by the high-speed reciprocating motion of the components is balanced by adopting a half-balance method through arranging a vibration balancing device 10 at a reverse position in the variable crank-connecting rod mechanism 7, namely, all centrifugal inertia force and half reciprocating inertia force are balanced, and the balance mass is obtained by a crank-connecting rod mechanism half-balance method formula.
The invention has the beneficial effects that:
(1) the piston moves upwards and horizontally by the up-and-down reciprocating motion of the ejector rod 4 under the constraint of the guide mechanism 5 of the frame 1, so that the reciprocating motion mechanism is separated from the test piece observation platform; and meanwhile, the lower part frame is closed, so that the shaft of the crank or the oil thrower in the variable crank connecting rod mechanism 7 can be conveniently splashed and lubricated.
(2) The length of the crank can be adjusted in a stepless way within a certain range by the spiral adjusting device comprising the crank shaft and the crank length which are connected in a rotating way at the 4 positions, so that the experimental device has stronger universality.
(3) The dynamic balance problem of the whole rack is considered, the vibration balance device 10 is introduced, vibration caused by unbalanced inertia force is greatly reduced by arranging balance blocks, and the service life of each part and the observation precision are improved.
Drawings
FIG. 1 is a schematic view of the general structure of a variable crank radius reciprocating motion simulator mechanism of the present invention;
FIG. 2 is a schematic diagram of the main cross-sectional structure of the variable crank radius reciprocating motion simulating mechanism of the present invention.
The reference numbers in the figures are: 1. a frame; 2. a crank length adjusting device; 3. a test piece mounting platform; 4. a top rod; 5. a mandril guide mechanism; 6. a connecting rod; 7. a variable crank link mechanism; 8. a power plant; 9. a right main journal; 10. a vibration balancing device; 11. a right crank; 12. a connecting rod journal; 13. a left crank; 14. a sleeve; 15. a tapered roller bearing; 16. the standard component is fixed by the thrust retaining ring or the double nuts; 17. a hand wheel; 18. a sliding screw; 19. a sliding nut; 20. a jack rod sleeve; 21. a jack rod sleeve seat; 22. and a motor power input shaft.
Detailed Description
The invention is further described with reference to the following figures and specific examples.
Example 1: as shown in fig. 1 and 2, a reciprocating motion simulation mechanism of an internal combustion engine with a variable crank radius comprises a frame 1, a crank length adjusting device 2, a test piece mounting platform 3, a mandril guide mechanism 5, a connecting rod 6, a variable crank connecting rod mechanism 7, a mandril 4, a power device 8 and a right main journal 9;
the left side, the right side and the upper part of a frame 1 are respectively provided with a mounting hole, a crank length adjusting device 2 passes through the mounting hole on the left side of the frame 1 and then is connected with the left side of a variable crank link mechanism 7 in the frame 1, a right main journal 9 passes through the mounting hole on the right side of the frame 1 and then is connected with the right side of the variable crank link mechanism 7, the right main journal 9 is axially fixed by the frame 1, a power device 8 is connected with the right main journal 9, a mandril guide mechanism 5 is arranged at the mounting hole on the upper side of the frame 1, a test piece mounting platform 3 is fixed right above the frame 1, the upper end of a mandril 4 is connected with the test piece mounting platform 3, the lower end passes through the guide mechanism 5 and then is connected with the upper end of a connecting rod 6 in the frame 1, the lower end of the connecting rod 6 is connected with the upper end of the variable crank link mechanism 7, the power device 8, the crank length adjustment device 2 is used to achieve length adjustment of the variable crank link mechanism 7.
The crank length adjusting device 2 comprises a hand wheel 17, a sliding screw 18, a nut 19, a bearing 15, a thrust retainer ring or a double-nut fixed standard part 16 and a sleeve 14; the sleeve 14 is installed in a mounting hole in the left side of the frame 1, the bearing 15 is installed inside the sleeve 14, the nut 19 is installed on an inner ring of the bearing 15 and is axially fixed, the thrust retainer ring or a double-nut fixing standard part 16 is fixed on the nut 19 and is used for fixing the bearing 15, the sliding screw 18 is in threaded connection with the inner wall of the nut 19, the left end of the sliding screw 18 is connected with the hand wheel 17, the right end of the sliding screw is connected with the left end of the variable crank link mechanism 7, and the axial position of the sliding screw 18 is changed by rotating the hand wheel 17, so that the variable crank link mechanism 7. During operation, the sliding screw 18 and the nut 19 rotate along with the variable crank link mechanism 7 as a whole due to the self-locking function of the sliding screw 18 and the nut 19; when the length of the crank needs to be adjusted, the nut 19 is fixed, the hand wheel 17 is rotated, and the axial position of the screw 18 is changed, so that the variable crank connecting rod mechanism is pushed to move.
The variable crank connecting rod mechanism 7 comprises a left crank 13, a connecting rod journal 12 and a right crank 11, wherein the left end of the left crank 13 is connected with the crank length adjusting device 2, the right end of the left crank 13 is connected with the left end of the connecting rod journal 12, the right end of the connecting rod journal 12 is connected with the left end of the right crank 11, the right end of the right crank 11 is connected with the right main journal 9, and the middle part of the connecting rod journal 12 is connected with the connecting rod 6 above.
The variable crank link mechanism 7 further comprises vibration balance devices 10 at the left end and the right end, the left end of the vibration balance device 10 at the left end is connected with the crank length adjusting device 2, the right end of the vibration balance device 10 at the left end is connected with the left end of the left crank 13, the left end of the vibration balance device 10 at the right end is connected with the right end of the right crank 11, and the right end of the vibration balance device 10 at the right end is connected with the right main journal 9. The vibration balance device 10 comprises a disc fixed on the crankshafts of the left crank 13 and the right crank 11 and a balance weight fixed on the disc, the mass and the arrangement position of the balance weight are determined by stress calculation, and the balance weight arranged on the opposite side of the crankshafts performs dynamic balance on unbalanced reciprocating inertia force and centrifugal inertia force.
The vibration balance device 10 at the left end, the left crank 13, the connecting rod journal 12, the right crank 11 and the vibration balance device 10 at the right end are hinged with each other, so that the length change of the actual variable crank-connecting rod mechanism 7 can be realized when the hand wheel 17 is rotated.
The ejector rod guide mechanism 5 comprises an ejector rod sleeve 20 and an ejector rod sleeve seat 21, the ejector rod sleeve seat 21 is located at a mounting hole in the upper portion of the rack 1, the ejector rod sleeve 20 is mounted inside the ejector rod sleeve seat 21, the lower end of the ejector rod 4 penetrates through the ejector rod sleeve 20 and then extends into the rack 1, the ejector rod 4 freely slides in the ejector rod sleeve 20, a connecting lug is arranged at the lower end of the ejector rod 4 and provided with a pin hole, the upper end of the connecting rod 6 is a small connecting rod head, the lower end of the connecting rod is a large connecting rod head, the small connecting rod head is provided with a pin hole, the connecting rod 6 is rotatably connected with the ejector rod 4 by penetrating through the pin hole in the connecting lug and the pin hole in the small connecting rod head through a pin, and the large connecting rod. Wherein the ejector rod 4 is rigidly connected with the test piece mounting platform 3 and the connecting lug. And the ejector rod guide mechanism 5 is used for guiding the ejector rod 4.
The ejector rod sleeve 20 and the ejector rod sleeve seat 21 are made of alloy steel, and a reasonable gap is ensured through fine machining and matched grinding, and the gap is too large, easy to leak oil and inaccurate in guiding; the clearance is too small, which is unfavorable for lubrication and easy to block. In this embodiment, a hole is formed on the large end of the connecting rod 6, the connecting rod journal 12 passes through the hole on the large end of the connecting rod 6, and the restriction of the hole on the large end of the connecting rod 6 ensures that the central line of the connecting rod journal 12 is parallel to the central line of the right journal 9, so as to realize a correct piston reciprocating motion rule. It should be noted that the structure of the top rod 4 in this embodiment is only an example, and other mechanical structures with the same function may be adopted for replacement.
The power device 8 is a servo motor, and a motor power input shaft 22 of the servo motor is connected with the right main journal 9. The motor drives a crankshaft in the variable crank connecting rod mechanism 7 to rotate at a certain speed, and the crankshaft drives the ejector rod 4 to reciprocate through the connecting rod 6, so that the reciprocating motion simulation is realized.
The shaft of the sliding screw 18 is provided with a crank radius scale value which is used for determining the radius of a crank in the current variable crank connecting rod mechanism 7.
The variable crank link mechanism 7 is partially immersed in an oil sump or splash-lubricated by an oil slinger attached to the variable crank link mechanism 7.
The variable crank connecting rod mechanism 7 is driven to move by the power device 8, and finally the ejector rod 4 is driven to reciprocate up and down; the crank length adjusting device 2 is used for realizing the adjustment of the crank length of the variable crank connecting rod mechanism 7; the ejector rod 4 comprising an installation platform is used for simulating the motion law of the small end of the connecting rod in the power device 8 to the test piece installation platform 3; the device comprises a frame 1 comprising a mandril guide mechanism 5, a support mechanism and a control mechanism, wherein the frame 1 is used for supporting all components; and the power device 8 comprises a servo motor and matched equipment and is used for providing power.
The experimental operation steps of the reciprocating motion simulation mechanism are as follows: firstly, manufacturing a simplified connecting rod 6 according to the length of a connecting rod of a researched machine type; the connecting rod journal 12 penetrates through a seat hole of a connecting rod big end at the lower end of the connecting rod 6 to realize the rotary connection of the connecting rod 6 and the connecting rod journal 12; then the axial position of a sliding screw 18 is adjusted by rotating a hand wheel 17, and the length of the simulation crank is adjusted; a pin penetrates through a connecting rod small head seat hole and a connecting lug pin hole at the lower end of the ejector rod 4 to realize the rotary connection of the connecting rod and the ejector rod mechanism; after installation, the crank connecting rod mechanism is kept at the position of the lower dead point; the ejector rod mechanism is connected with the rack 1 in a sliding way through a guide mechanism 5, and the perpendicularity of the ejector rod 4 is ensured by the guide mechanism 5; and finally, mounting the test piece on the mounting platform 3, and starting the motor to perform an experiment.
The reciprocating motion simulation mechanism drives the variable crank connecting rod mechanism 7 to move through the power device 8, and finally drives the ejector rod to reciprocate up and down. The invention has high simulation precision and strong universality, can dynamically simulate the high-speed reciprocating motion in the internal combustion engine and provides a basis for the relevant research of the piston of the internal combustion engine.
While the present invention has been described in detail with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, and various changes can be made without departing from the spirit and scope of the present invention.
Claims (7)
1. A reciprocating motion simulation mechanism of an internal combustion engine with a variable crank radius is characterized by comprising a rack (1), a crank length adjusting device (2), a test piece mounting platform (3), an ejector rod guide mechanism (5), a connecting rod (6), a variable crank connecting rod mechanism (7), an ejector rod (4), a power device (8) and a right main journal (9);
the left side, the right side and the upper part of a frame (1) are respectively provided with a mounting hole, a crank length adjusting device (2) penetrates through the mounting hole on the left side of the frame (1) and then is connected with the left side of a variable crank link mechanism (7) in the frame (1), a right main journal (9) penetrates through the mounting hole on the right side of the frame (1) and then is connected with the right side of the variable crank link mechanism (7), the right main journal (9) is axially fixed by the frame (1), a power device (8) is connected with the right main journal (9), a mandril guide mechanism (5) is arranged at the mounting hole on the upper part of the frame (1), a test piece mounting platform (3) is fixed right above the frame (1), the upper end of a mandril (4) is connected with the test piece mounting platform (3), the lower end of the mandril guide mechanism (5) penetrates and then is connected with the upper end of a connecting rod (6) in the frame (1), the lower end of the connecting rod, the power device (8) drives the variable crank connecting rod mechanism (7) to reciprocate through the right main journal (9), the variable crank connecting rod mechanism (7) drives the connecting rod (6) to reciprocate up and down, and the crank length adjusting device (2) is used for adjusting the length of the variable crank connecting rod mechanism (7);
the crank length adjusting device (2) comprises a hand wheel (17), a sliding screw (18), a nut (19), a bearing (15), a sleeve (14) and a thrust retainer ring or double-nut fixed standard part (16); the sleeve (14) is arranged in a mounting hole in the left side of the rack (1), the bearing (15) is arranged in the sleeve (14), the nut (19) is arranged on the inner ring of the bearing (15) and is axially fixed, the thrust retainer ring or a double-nut fixed standard component (16) is fixed on the nut (19), the sliding screw (18) is in threaded connection with the inner wall of the nut (19), the left end of the sliding screw (18) is connected with the hand wheel (17), the right end of the sliding screw is connected with the left end of the variable crank link mechanism (7), and the axial position of the sliding screw (18) is changed by rotating the hand wheel (17), so that the variable crank link mechanism (7) is pushed to move;
the variable crank connecting rod mechanism (7) comprises a left crank (13), a connecting rod journal (12) and a right crank (11), the left end of the left crank (13) is connected with the crank length adjusting device (2), the right end of the left crank (13) is connected with the left end of the connecting rod journal (12), the right end of the connecting rod journal (12) is connected with the left end of the right crank (11), the right end of the right crank (11) is connected with the right main journal (9), and the middle part of the connecting rod journal (12) is connected with the connecting rod (6) above;
ejector rod guiding mechanism (5) include ejector rod cover (20) and ejector rod cover seat (21), ejector rod cover seat (21) are located the mounting hole department on frame (1) upper portion, ejector rod cover (20) are installed inside ejector rod cover seat (21), ejector rod (4) lower extreme passes and stretches into inside frame (1) after passing ejector rod cover (20), ejector rod (4) freely slide in ejector rod cover (20), the engaging lug is established to the lower extreme of ejector rod (4), be equipped with the pinhole on the engaging lug, connecting rod (6) upper end is the connecting rod microcephaly, the lower extreme is the connecting rod major part, the connecting rod microcephaly is equipped with the pinhole, pass the pinhole on the engaging lug and the pinhole on the connecting rod microcephaly through the round pin, make connecting rod (6) rotate with ejector rod (4) and be connected, the connecting rod major part of connecting rod (6) rotates with the middle part of variable crank link mechanism (7) of lower extreme and is connected.
2. The reciprocating motion simulation mechanism of the internal combustion engine with the variable crank radius according to claim 1, characterized in that the variable crank connecting rod mechanism (7) further comprises vibration balance devices (10) at the left end and the right end, the left end of the vibration balance device (10) at the left end is connected with the crank length adjusting device (2), the right end is connected with the left end of the left crank (13), the left end of the vibration balance device (10) at the right end is connected with the right end of the right crank (11), and the right end is connected with the right main journal (9).
3. A reciprocating motion simulating mechanism with variable crank radius for internal combustion engine as claimed in claim 2, wherein the vibration balance device (10) comprises a disk fixed on the crankshafts of the left crank (13) and the right crank (11) and a balance weight fixed on the disk.
4. The reciprocating motion simulation mechanism of the internal combustion engine with the variable crank radius is characterized in that the vibration balance device (10) at the left end, the left crank (13), the connecting rod journal (12), the right crank (11) and the vibration balance device (10) at the right end are hinged with each other, so that the length change of the actual variable crank-connecting rod mechanism (7) can be realized when the hand wheel (17) is rotated.
5. The reciprocating motion simulation mechanism of the internal combustion engine with the variable crank radius as set forth in claim 1, characterized in that the power device (8) is a servo motor, and a motor power input shaft (22) of the servo motor is connected with the right main journal (9).
6. A variable crank radius engine reciprocation simulation mechanism according to claim 1, wherein the shaft of the sliding screw (18) has crank radius scale values for determining the radius of the crank in the current variable crank linkage mechanism (7).
7. A variable crank radius internal combustion engine reciprocation simulation mechanism according to claim 1, wherein the variable crank link mechanism (7) is partially immersed in an oil bath or splash-lubricated by an oil slinger attached to the variable crank link mechanism (7).
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| CN201711021865.6A CN108051219B (en) | 2017-10-27 | 2017-10-27 | Reciprocating motion simulation mechanism of internal combustion engine with variable crank radius |
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| CN109708984B (en) * | 2018-12-24 | 2021-05-18 | 昆明理工大学 | Variable crank thermal fatigue test bed for high-frequency heating test piece and working method of variable crank thermal fatigue test bed |
| CN113659870A (en) * | 2021-07-15 | 2021-11-16 | 哈尔滨工程大学 | Piezoelectric power supply device and method in marine diesel engine |
| CN113926682B (en) * | 2021-10-13 | 2022-09-23 | 袁晓恳 | High-strength extremely-low-frequency sound generator |
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