CN115771085A - Exhaust valve grinding equipment for marine diesel engine repair - Google Patents

Abstract

The invention discloses an exhaust valve grinding device for marine diesel engine repair, which comprises a base, a column sleeve, a column screw and a cam. The base is equipped with four seat plate flanges, and the four seat plate flanges are A flange is installed on the flange, and a column casing is installed on the flange. The present invention realizes semi-automatic grinding by setting the cam to drive the exhaust valve to move up and down, and replaces manual operation with mechanical movement equipment, reducing the labor intensity of workers. To improve work efficiency and realize equipment specialization in professional repair engineering, the supporting legs of the workbench of the present invention adopt the adjustable screw structure to adjust the height of the tooling platform so as to be suitable for exhaust valves of different specifications, which makes the scope of application of the present invention wider. The off-angle design of the position of the top wheel can realize the automatic rotation of the exhaust valve during grinding to improve the grinding quality, and the invention can realize the required grinding frequency through the speed adjustment of the worm gear reducer.

Description

Exhaust valve grinding equipment for marine diesel engine repair

technical field

The invention relates to the technical field of marine diesel engines, in particular to exhaust valve grinding equipment for repairing marine diesel engines.

Background technique

Diesel engines for ships have high thermal efficiency, good economy, easy starting, and great adaptability to various ships. They were used as propulsion power for ships soon after they came out. By the 1950s, among newly built ships, diesel engines Almost completely replacing the steam engine, the marine diesel engine has become the main power of civil ships, small and medium-sized ships and conventional submarines. The exhaust valve of the diesel engine is an important part of the diesel engine. The working performance of the exhaust valve affects the stability, reliability, power, economy and exhaust gas indicators of the diesel engine.

When the marine diesel engine is working, the exhaust valve seat is in the harsh environment of high temperature and high pressure, and also bears the impact load of the valve, which produces alternating mechanical stress and deformation, causing relative displacement of the contact surface between the valve and the valve seat, and at the same time There will also be defects such as wear, pitting, dents and cracks on the surface of the air valve and valve seat. These defects destroy the sealing performance of the air valve and valve seat and affect the normal operation of the diesel engine. The repair of the air valve and the valve seat is a very important task. In order to ensure the tightness of the air valve and the valve seat, the mating surface of the air valve and the valve seat must be ground.

However, due to the small market, there is no professional manufacturer to produce this type of professional equipment, and most of them are manually polished, which has low efficiency, high labor intensity and high labor cost.

Contents of the invention

The purpose of the present invention is to provide an exhaust valve grinding equipment for repairing marine diesel engines to solve the problems of low manual operation efficiency due to the fact that there is no mature product in the market for grinding exhaust valves for large diesel engine repairs in the above background technology.

To achieve the above object, the present invention provides the following technical solutions:

An exhaust valve grinding device for marine diesel engine repair, including a base, a column sleeve, a column screw and a cam, four seat plate flanges are installed on the base, and four seat plate flanges are installed on the four seat plate flanges. Lan, a column sleeve is installed on the flange, a column screw is arranged inside the column sleeve, a guide sleeve is installed semi-embedded on the top of the column sleeve, and a support ring is fixedly installed on the guide sleeve, A nut is installed on the column screw, the nut is arranged above the support ring, a handle is installed on the nut, a panel is installed on the top of the column screw, and a reinforcing sleeve is installed in the middle of the panel. An exhaust valve is provided through the middle of the strengthening sleeve, a cam is provided on the base, and a camshaft is installed in the middle of the cam, and the camshaft is rotatably connected with two bearing seats installed on the base. One side of the shaft is connected with a reduction box, the other end of the reduction box is connected with a belt transmission assembly, and the other end of the belt transmission assembly is connected with a motor.

As a further solution of the present invention: first ribs are installed on both sides of the bottom of the panel, and second ribs are installed on the bottom of the first ribs.

As a further solution of the present invention: a shaft coupling is provided between the camshaft and the reduction box, and the camshaft and the input shaft of the reduction box are connected through a coupling.

As a further solution of the present invention: the belt transmission assembly includes a large pulley, a V-belt and a small pulley, the large pulley is installed on the output shaft of the reduction box, the small pulley is installed on the output shaft of the motor, and the small The belt pulley and the large belt pulley are connected through a V-belt transmission.

As a further solution of the present invention: the cam is set to the side directly below the exhaust valve.

As a further solution of the present invention: an oil groove is provided on the base directly below the cam.

As a further solution of the present invention: a motor adjustment seat is installed at the bottom of the motor.

As a further solution of the present invention: the cam rotates counterclockwise.

As a further solution of the present invention: a fixed flange and a fixed seat plate are arranged between the panel and the four column screws, the fixed flange is installed on the top of the column screw, and the fixed seat plate is installed on the panel The bottom surface of the fixed flange and the fixed seat plate are fixedly connected by bolts.

Compared with prior art, the beneficial effect of the present invention is:

1. The present invention realizes semi-automatic grinding by setting the cam-driven exhaust valve to move up and down, replaces manual operation with mechanical movement equipment, reduces labor intensity of workers, improves work efficiency, and realizes equipment specialization in professional repair engineering.

2. The supporting legs of the workbench of the present invention adopt an adjustable screw structure to adjust the height of the tooling platform so as to be suitable for exhaust valves of different specifications, which makes the scope of application of the present invention wider.

3. The off-angle design of the position of the top wheel of the present invention can realize the automatic rotation of the exhaust valve during grinding and improve the grinding quality.

4. The present invention can realize the required grinding frequency through the speed adjustment of the worm gear reducer.

Description of drawings

Fig. 1 is a cutaway view of the structure of an exhaust valve grinding device for marine diesel engine repair.

Fig. 2 is a structural diagram of an exhaust valve grinding device for marine diesel engine repair in the direction of A-A in Fig. 1 .

1. Base; 2. Seat plate flange; 3. Flange; 4. Column bushing; 5. Column screw; 6. Guide sleeve; 7. Support ring; 8. Handle; 9. Nut; 10. First Rib; 11, panel; 12, fixed seat plate; 13, fixed flange; 14, reinforced sleeve; 15, second rib; 16, cam; 17, camshaft; 18, bearing seat; 19, coupling 20, reduction box; 21, belt drive assembly; 2101, large pulley; 2102, V-belt; 2103, small pulley; 22, exhaust valve; 23, lubricating oil groove; 24, motor; 25, motor adjustment seat.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Please refer to Fig. 1-2, in the embodiment of the present invention, a kind of exhaust valve grinding equipment for marine diesel engine repair, comprises base 1, column bushing 4, column screw 5 and cam 16, and base 1 is installed with four seats Plate flange 2, flange 3 is installed on four seat plate flanges 2, column sleeve 4 is installed on flange 3, column screw rod 5 is arranged inside column sleeve 4, and the top of column sleeve 4 is semi-embedded A guide sleeve 6 is installed, a support ring 7 is fixedly installed on the guide sleeve 6, a nut 9 is installed on the column screw rod 5, the nut 9 is arranged above the support ring 7, a handle 8 is installed on the nut 9, and the top of the column screw rod 5 A panel 11 is installed, and a reinforcing sleeve 14 is installed in the middle of the panel 11, and an exhaust valve 22 is installed through the middle of the reinforcing sleeve 14. The supporting legs of the workbench adopt a structure of a column screw rod 5 to adjust the height of the tooling platform so that it is suitable for different specifications. The exhaust valve 22 is provided with a cam 16 on the base 1, and the cam 16 is used to drive the exhaust valve 22 to move up and down to realize semi-automatic grinding. A camshaft 17 is installed in the middle of the cam 16, and the camshaft 17 and the The two bearing housings 18 are rotationally connected, one side of the camshaft 17 is connected with a reduction box 20, and the required grinding frequency can be realized by adjusting the speed of the worm gear type reduction box 20, and the other end of the reduction box 20 is connected with a belt drive assembly 21, The other end of the belt drive assembly 21 is connected with a motor 24 .

The first ribs 10 are installed on both sides of the bottom of the panel 11, and the bottom of the first ribs 10 is equipped with a second ribs 15. The arrangement of the first ribs 10 and the second ribs 15 can improve the structural strength of the panel 11 , making it bear more weight.

A shaft coupling 19 is arranged between the camshaft 17 and the reduction box 20 , and the camshaft 17 and the input shaft of the reduction box 20 are connected through the transmission coupling 19 .

Belt transmission assembly 21 comprises large pulley 2101, V-belt 2102 and small pulley 2103, and large pulley 2101 is installed on the output shaft of reduction box 20, and small pulley 2103 is installed on the output shaft of motor 24, between small pulley 2103 and large pulley 2101 Through the V-belt 2102 drive connection.

The cam 16 is set on the side directly below the exhaust valve 22, so that the design can realize the automatic rotation of the exhaust valve during grinding and improve the grinding quality.

Just below the cam 16, the base 1 is provided with a lubricating oil groove 23. Lubricating oil is arranged in the lubricating oil groove 23. When the cam 16 rotates, the lubricating oil adheres to its surface. The setting of the lubricating oil groove 23 can make the surface friction of the cam 16 smaller. The friction between the cam 16 and the valve seat is reduced, and the degree of wear of the valve seat is reduced.

The bottom of the motor 24 is equipped with a motor adjusting seat 25, and the motor adjusting seat 25 is used to fix the motor 24 and adjust the installation position of the motor 24.

The cam 16 rotates counterclockwise, and this design can make the cam 16 lift the exhaust valve 22 back and forth better.

A fixed flange 13 and a fixed seat plate 12 are arranged between the panel 11 and the four column screw rods 5, the fixed flange 13 is installed on the top of the column screw rod 5, the fixed seat plate 12 is installed on the bottom surface of the panel 11, and the fixed flange 13 and the fixed seat plate 12 are fixedly connected by bolts, so that the panel 11 and the column screw mandrel 5 can be disassembled, replaced and maintained by such a design, which can reduce the maintenance cost.

The current pure manual operation cost: Grinding an exhaust valve 22 two working hours 0.5 hours;

It is estimated that it will take two hours to grind an exhaust valve 22 by using the equipment; 0.125 manpower is used;

Grinding each exhaust valve 22 can save labor costs by 0.375 manpower on average.

The annual maintenance project completes the grinding operation of 600 exhaust valves 22, which can save a total of 0.375*600=225 manpower,

The total labor cost can be saved throughout the year: 225 workers * 300 yuan/work = 67,500 yuan.

The standard parts used in the present invention can be purchased from the market, and the special-shaped parts can be customized according to the instructions and the records of the accompanying drawings. The specific connection methods of each part adopt mature bolts, rivets, welding, etc. in the prior art. Conventional means, machinery, parts and equipment all adopt conventional models in the prior art, plus the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here, and the content that is not described in detail in this manual belongs to prior art known to those skilled in the art.

The working principle of the present invention is:

When in use, the personnel turns the handle 8, and the handle 8 drives the nut 9 to rotate relative to the column screw 5, thereby driving the column screw 5 to rise or lower relative to the column sleeve 4, so as to realize the adjustment of the distance between the platform and the cam 16 on the base 1 to the exhaust gas. The height of the valve 22 is suitable, and then the motor 24 drives the cam 16 to rotate counterclockwise through the belt drive assembly 21 and the reduction box 20, so that the exhaust valve 22 moves linearly, and the jacking of the exhaust valve 22 is a uniform speed linear motion, and the exhaust valve 22 When falling, it is a free fall movement. During installation, adjust the jacking distance to determine the impact force generated by the falling speed of the valve head. At the same time, the eccentricity of the installation of the cam 16 is used to realize the circumferential rotation of the fixed angular displacement while the reciprocating movement of the valve head. Simulation The movement and rotation of the diesel engine in the working state, the grinding of the working surface of the valve head and seat is realized by applying abrasive paste on the contact surface of the valve seat and reciprocating impact on the working surface.

Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or perform equivalent replacements for some of the technical features. Within the spirit and principles of the present invention, any modifications, equivalent replacements, improvements, etc., shall be included in the protection scope of the present invention.

Claims (9)

1. An exhaust valve grinding device for marine diesel engine repair, comprising a base (1), a column sleeve (4), a column screw (5) and a cam (16), characterized in that: the base (1) Four seat plate flanges (2) are installed, flanges (3) are installed on the four seat plate flanges (2), and column sleeves (4) are installed on the flanges (3), so The column sleeve (4) is provided with a column screw (5), the top of the column sleeve (4) is semi-embedded with a guide sleeve (6), and a support ring is fixedly installed on the guide sleeve (6). (7), a nut (9) is installed on the column screw (5), the nut (9) is arranged above the support ring (7), and a handle (8) is installed on the nut (9), so A panel (11) is installed on the top of the column screw (5), a reinforcing sleeve (14) is installed in the middle of the panel (11), and an exhaust valve (14) is provided through the middle of the reinforcing sleeve (14). 22), the base (1) is provided with a cam (16), the camshaft (17) is installed in the middle of the cam (16), and the camshaft (17) and two The bearing housing (18) is rotationally connected, and one side of the camshaft (17) is connected with a reduction box (20), and the other end of the reduction box (20) is connected with a belt transmission assembly (21), and the belt transmission assembly ( 21) the other end is connected with motor (24). 2. A kind of exhaust valve grinding equipment for marine diesel engine repair according to claim 1, characterized in that: first ribs (10) are installed on both sides of the bottom of the panel (11), and the first ribs The bottom end of the plate (10) is provided with a second rib (15). 3. A kind of exhaust valve grinding equipment for marine diesel engine repair according to claim 1, characterized in that: a shaft coupling (19) is arranged between the camshaft (17) and the reduction box (20), and The camshaft (17) and the input shaft of the reduction box (20) are connected through a shaft coupling (19). 4. A kind of exhaust valve grinding equipment for marine diesel engine repair according to claim 1, characterized in that: the belt drive assembly (21) includes a large pulley (2101), a V-belt (2102) and a small pulley (2103 ), the large pulley (2101) is installed on the output shaft of the reduction box (20), and the small pulley (2103) is installed on the output shaft of the motor (24), and the small pulley (2103) and the large pulley (2101 ) are connected by V-belt (2102) transmission. 5 . The exhaust valve grinding equipment for marine diesel engine repair according to claim 1 , characterized in that: the cam ( 16 ) is arranged on the side directly below the exhaust valve ( 22 ). 6 . The exhaust valve grinding equipment for marine diesel engine repair according to claim 1 , characterized in that: an oil groove ( 23 ) is provided on the base ( 1 ) directly below the cam ( 16 ). 7. The exhaust valve grinding equipment for marine diesel engine repair according to claim 1, characterized in that: a motor adjustment seat (25) is installed on the bottom of the motor (24). 8. The exhaust valve grinding device for marine diesel engine repair according to claim 1, characterized in that: the cam (16) rotates counterclockwise. 9. A kind of exhaust valve grinding equipment for marine diesel engine repair according to claim 1, characterized in that: fixed flanges (13) are arranged between the panel (11) and the four column screw rods (5) ) and the fixed seat plate (12), the fixed flange (13) is installed on the top of the column screw (5), the fixed seat plate (12) is installed on the bottom surface of the panel (11), the fixed flange ( 13) It is fixedly connected with the fixed seat plate (12) by bolts.

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