CN117404154A - Lubricating oil pressure regulating device for marine diesel engine - Google Patents
Lubricating oil pressure regulating device for marine diesel engine Download PDFInfo
- Publication number
- CN117404154A CN117404154A CN202311603345.1A CN202311603345A CN117404154A CN 117404154 A CN117404154 A CN 117404154A CN 202311603345 A CN202311603345 A CN 202311603345A CN 117404154 A CN117404154 A CN 117404154A
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- Prior art keywords
- pressure regulating
- pressure
- pilot
- oil
- limiting valve
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- 230000001105 regulatory effect Effects 0.000 title claims abstract description 127
- 239000010687 lubricating oil Substances 0.000 title claims abstract description 55
- 239000003921 oil Substances 0.000 claims abstract description 62
- 238000005192 partition Methods 0.000 claims abstract description 22
- 230000007246 mechanism Effects 0.000 claims abstract description 15
- 230000001681 protective effect Effects 0.000 claims description 4
- 239000010759 marine diesel oil Substances 0.000 claims 4
- 239000010710 diesel engine oil Substances 0.000 claims 1
- 238000005461 lubrication Methods 0.000 abstract description 6
- 238000010276 construction Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 3
- 230000001050 lubricating effect Effects 0.000 description 7
- 230000001276 controlling effect Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M1/00—Pressure lubrication
- F01M1/16—Controlling lubricant pressure or quantity
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
Abstract
The invention discloses a lubricating oil pressure regulating device of a marine diesel engine, which comprises a centrifugal filter support, a starting pressure regulating assembly, a pressure regulating valve assembly and a pressure limiting valve, wherein the centrifugal filter support is fixed on one side of a marine diesel engine body, and the starting pressure regulating assembly and the pressure regulating valve assembly are connected in front-back mode to cross the middle of the centrifugal filter support. The centrifugal filter support is of a box body structure, and the box body is divided into an oil inlet cavity and an oil return cavity through a middle partition board. The pressure regulating valve assembly comprises a pilot pressure regulating mechanism and a pressure regulating piston. The pilot pressure regulating mechanism comprises a pilot control oil duct and a pilot end cover. The invention obviously reduces the construction cost and improves the construction efficiency and the working reliability of the lubrication system. The lubricating oil pressure fluctuation is small, the pressure regulating valve is flexible to open and close, and the pressure lubrication effect of the marine diesel engine is obviously improved.
Description
Technical Field
The invention relates to an oil control device, in particular to a device for adjusting oil pressure of a diesel engine, and belongs to the technical field of internal combustion engines.
Background
The pressure circulation lubrication is one of main lubrication modes of the diesel engine, and the pressure circulation lubrication adopts a lubricating oil pump to boost the pressure of the lubricating oil and then continuously convey the lubricating oil to friction surfaces of moving parts such as a main bearing, a connecting rod bearing, a camshaft bearing and the like of the diesel engine, so that the moving parts are well lubricated under the condition that the lubricating oil is fully supplied, and the pressure lubricating oil also has the cleaning and strong cooling effects. The lubricating oil pump of the diesel engine provides stable pressure lubricating oil, and the pressure regulating valve arranged by the pressure circulation lubricating system ensures that the total lubricating oil pressure of the system is kept stable, so that the lubricating oil forms an oil film on each part needing to be lubricated, and the expected working requirement is met.
The existing diesel engine lubricating oil system is connected with independent equipment and components such as a lubricating oil pump, a cooler, a filter, a constant temperature valve, a pressure regulating valve and the like through lubricating oil pipelines, and has numerous pipelines and complicated construction. After long-term use, the pipeline joint is easy to leak oil, and the lubricating oil flows everywhere so as to pollute the working environment of the diesel engine; the lubricating effect is seriously affected due to the reduction of lubricating oil pressure, so that the frequent occurrence of diesel engine faults is caused. The lubricating oil pressure used for controlling the opening and closing of the pressure regulating valve is the medium pressure which flows through a lubricating oil filter, a lubricating oil cooler and other valve members, the differential pressure of the cooler is increased along with the lengthening of the service time due to the influence of dirt, and the differential pressure of the filter is increased along with the enlargement of the differential pressure, so that the fluctuation of the lubricating oil pressure regulated by the pressure regulating valve is larger, the influence on the piston movement of the pressure regulating valve is larger or the main piston is abnormal, and the lubricating effect of moving parts of the diesel engine is seriously influenced.
Disclosure of Invention
The invention aims to provide a marine diesel engine lubricating oil pressure regulating device which is compact in structure, free of connecting pipelines and flexible in pressure regulation.
The invention is realized by the following technical scheme:
the lubricating oil pressure regulating device of the marine diesel engine comprises a centrifugal filter support, a starting pressure regulating assembly, a pressure regulating valve assembly and a pressure limiting valve arranged on the lower side of the pressure regulating valve assembly, wherein the centrifugal filter support is fixed on one side of a marine diesel engine body, the starting pressure regulating assembly and the pressure regulating valve assembly are connected front and back to cross the middle part of the centrifugal filter support, the pressure regulating assembly is arranged on one side of the centrifugal filter support, and the starting pressure regulating assembly is arranged on the other side of the centrifugal filter support; the centrifugal filter support is of a box structure, a pressure regulating pipe with one end extending outwards horizontally is arranged in the middle of one side of the box, the pressure regulating end cover is fixed on the outer end port of the pressure regulating pipe, the pressure regulating spring seat is embedded into the outer end of an inner hole of the pressure regulating pipe, one end of a regulating screw screwed in the center of the pressure regulating end cover stretches into the pressure regulating pipe, and then abuts against a counter bore at one end of the pressure regulating spring seat, and the regulating screw is locked through the locking nut; one end of the pressure regulating spring is propped against one end of the pressure regulating spring seat, and a protective cover sleeved on the other end of the regulating screw is fixed outside the pressure regulating end cover; the box body is divided into an oil inlet cavity at one corner of the box body and an oil return cavity at the other part of the box body by a rectangular middle partition plate, and an oil inlet pipe port and an oil return pipe port in the diesel engine body are respectively communicated with the oil inlet cavity and the oil return cavity of the corresponding centrifugal filter support;
the pressure regulating valve assembly comprises a pilot pressure regulating mechanism and a pressure regulating piston, the pressure regulating piston is of a stepped shaft structure, a central stepped counter bore is axially formed in one end of a large end shaft of the stepped shaft, the other end of a regulating spring is propped against the bottom of a large end hole at one end of the central stepped counter bore, one end of the large end shaft is supported in a pressure regulating pipe, a pilot cavity is inwards extended from the middle of the side wall at one side of the box body, and one end of a small end shaft of the stepped shaft is supported in a side wall central hole of the pilot cavity; a lubricating oil pressure release buffer mechanism is arranged between the joint of the large end shaft and the small end shaft and the step hole at the upper part of the middle partition plate;
the pilot pressure regulating mechanism comprises a pilot control oil duct and a pilot end cover, wherein the lower end of the pilot control oil duct which is vertically arranged in the upper part of one side of the centrifugal filter support is communicated with the pilot chamber, and the upper end of the pilot control oil duct is connected with the output end of the lubricating oil pump of the marine diesel engine through an input oil pipe; one end of the small end shaft of the stepped shaft penetrates through the through hole in the side wall of the pilot cavity and then is supported in a counter bore of the pilot end cover at one end of the pilot end cover, and the flange at the other end of the pilot end cover is fixed outside the other side of the box body.
The object of the present invention can be further achieved by the following technical means.
Further, the pressure limiting valve comprises a pressure limiting valve shell, a control piston, a return spring and a hole retainer ring, wherein the pressure limiting valve shell is transversely arranged at the lower side of the pressure regulating piston, an open end shaft sleeve of the pressure limiting valve shell is supported on the middle partition plate, and the open end shaft sleeve is communicated with the lubricating oil inlet cavity through a counter bore of the pressure limiting valve shell; the closed end flange of the pressure limiting valve shell is fixed on the outer side surface of the side wall of the box body of the lubricating oil return cavity, the control piston is embedded into the pressure limiting valve shell, one end of the return spring is supported in one end of the counter bore of the pressure limiting valve shell, and the other end of the return spring is abutted against one end of the control piston; a plurality of unloading transverse holes which transversely penetrate through the pressure limiting valve shell are uniformly distributed at one end, close to the middle partition plate, of the pressure limiting valve shell, and oil draining transverse holes which transversely penetrate through the pressure limiting valve shell up and down are formed at the other end, far away from the middle partition plate, of the pressure limiting valve shell, and the diameter of each unloading transverse hole is larger than that of each oil draining transverse hole; the control piston in the initial state seals the unloading transverse hole; the check ring for the hole is radially embedded into one end of the counter bore of the control piston.
Further, the lubricating oil pressure release buffer mechanism comprises a middle partition plate step hole and a plurality of slopes radially and uniformly distributed at the joint of a large end shaft and a small end shaft of the pressure regulating piston, the small end hole of the middle partition plate step hole is matched with the large end shaft of the pressure regulating piston, the threaded end of the large end shaft is supported in one end of the pressure regulating pipe, and the middle threaded section of the small end shaft is supported in a through hole in the side wall of the pilot chamber.
Furthermore, one end of the counter bore of the pilot end cover is respectively provided with a plurality of pilot transverse holes communicated with the pilot cavity.
Further, one end head of the adjusting screw is a spherical surface, and the spherical surface is abutted against the bottom conical surface of the counter bore at one end of the pressure adjusting spring seat.
Further, one end, far away from the reset spring, of the control piston of the pressure limiting valve is provided with symmetrical arc-shaped notches, and the arc-shaped notches are communicated with a counter bore of the control piston.
The invention integrates the opening pressure adjusting component, the pressure regulating valve component and the pressure limiting valve in the centrifugal filter support, and does not need to use a pipeline and a pipe joint for connection, thereby obviously reducing the construction cost and improving the construction efficiency and the working reliability of a lubrication system. According to the invention, the pilot pressure lubricating oil is adopted to push the pressure regulating piston to move, and the lubricating oil pressure release buffer mechanism is adopted to buffer the pressure lubricating oil, so that the on-off of the lubricating oil inlet cavity and the lubricating oil return cavity is gentle. The lubricating oil pressure for controlling the opening and closing of the pressure regulating valve is directly derived from the pressure lubricating oil output by the lubricating oil pump, a filter, a cooler and other valves are not needed, the fluctuation of the lubricating oil pressure is small, the pressure regulating valve is flexible to open and close, and the pressure lubricating effect of the marine diesel engine is obviously improved.
Advantages and features of the invention will be illustrated and explained by the following non-limiting description of preferred embodiments, given by way of example only with reference to the accompanying drawings 。
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a cross-sectional view B-B of FIG. 1, with the pressure regulating piston having been moved to the left to an open position;
FIG. 4 is an enlarged view of section I of FIG. 2;
fig. 5 is an enlarged three-dimensional view of the control piston.
Detailed Description
The invention is further described below with reference to the drawings and examples.
As shown in fig. 1 and 2, the invention comprises a centrifugal filter support 1, a cracking pressure regulating assembly 2, a pressure regulating valve assembly 3 and a pressure limiting valve 4 arranged on the lower side of the pressure regulating valve assembly 3, wherein the centrifugal filter support 1 is fixed on the right side of a marine diesel engine body 5, and the cracking pressure regulating assembly 2 and the pressure regulating valve assembly 3 are connected in a front-back mode and cross the middle of the centrifugal filter support 1. As shown in fig. 2, the pressure regulating valve assembly 3 is provided on the right side of the centrifugal filter holder 1, and the opening pressure regulating assembly 2 is provided on the left side of the centrifugal filter holder 1. The opening pressure adjusting assembly 2 comprises a protective cover 21, an adjusting screw 22, a pressure adjusting end cover 23, a pressure adjusting spring 24, a pressure adjusting spring seat 25 and a locking nut 26, the centrifugal filter support 1 is of a box structure, the middle of the left side of the box is provided with a pressure adjusting pipe 11 with one end extending horizontally outwards, the pressure adjusting end cover 23 is fixed on the port of the outer end of the pressure adjusting pipe 11, the pressure adjusting spring seat 25 is embedded into the outer end of an inner hole of the pressure adjusting pipe 11, the right end of the adjusting screw 22 screwed in the center of the pressure adjusting end cover 23 stretches into the pressure adjusting pipe 11 and then abuts against a counter bore 251 at the left end of the pressure adjusting spring seat 25, the adjusting screw 22 is locked through the nut 26, and the position of the adjusting screw 22 is prevented from changing due to vibration to influence on the pressure adjusting effect. The right end head of the adjusting screw 22 is a spherical surface 221, the spherical surface 221 is abutted against the conical surface at the bottom of the counter bore 251, so that the contact stability of the end head of the adjusting screw 22 and the conical surface at the bottom of the counter bore 251 can be improved, and the pretightening force of the adjusting spring 24 can be conveniently adjusted.
The left end of the pressure regulating spring 24 is abutted against a ring groove 252 at the right end of the pressure regulating spring seat 25, and a protective cover 21 sleeved on the left end of the regulating screw 22 is fixed on the outer end port of the pressure regulating pipe 11. The box body is divided into an oil inlet cavity 13 at the left upper corner of the box body and an oil return cavity 14 at the rest of the box body by a right-angled middle partition plate 12, and the port of an oil inlet pipe 51 and the port of an oil return pipe 52 in the diesel engine body 5 are respectively communicated with the oil inlet cavity 13 and the oil return cavity 14 of the corresponding centrifugal filter support 1.
The pressure regulating valve assembly 3 comprises a pilot pressure regulating mechanism 31 and a pressure regulating piston 32, the pressure regulating piston 32 is of a stepped shaft structure, a central stepped counter bore 324 is axially formed in one end of a large end shaft 321 of the stepped shaft, the right end of a pressure regulating spring 24 is propped against the bottom of a large end hole at the left end of the central stepped counter bore 324, the left end of the large end shaft 321 is supported in the pressure regulating pipe 11, a pilot chamber 151 extends inwards from the middle of a side wall 15 at the right side of the box body, and the right end of a small end shaft 322 of the stepped shaft is supported in a side wall central hole 152 of the pilot chamber 151. And a lubricating oil pressure release buffer mechanism 33 is arranged between the joint of the large end shaft 321 and the small end shaft 322 and the step hole 153 at the upper part of the middle partition plate.
The pilot pressure regulating mechanism 31 comprises a pilot control oil duct 311 and a pilot end cover 312, wherein the lower end of the pilot control oil duct 311 vertically arranged in the upper right side of the centrifugal filter support 1 is communicated with the pilot chamber 151, and the upper end of the pilot oil duct 311 is connected with the output end of the lubricating oil pump of the marine diesel engine through an input oil pipe 16. The right end head of the small end shaft 322 of the stepped shaft passes through the side wall through hole 152 of the pilot cavity and then is supported in the pilot end cover counter bore 313 at the left end of the pilot end cover 312, and the right end flange of the pilot end cover 312 is fixed outside the right side of the box body.
As shown in fig. 3, the pressure limiting valve 4 includes a pressure limiting valve housing 41, a control piston 42, a return spring 43 and a retainer ring 44 for hole, the pressure limiting valve housing 41 is transversely arranged at the lower side of the pressure regulating piston 32, an open end sleeve 411 at the left end of the pressure limiting valve housing 41 is supported on the middle partition plate 12, and the open end sleeve 411 is communicated with the lubricating oil inlet cavity 13 through a counter bore 411 of the pressure limiting valve housing. The closed end flange 412 at the right end of the pressure limiting valve housing 41 is fixed on the outer side surface of the tank right side wall 15 of the lubricating oil return cavity 14, the control piston 42 is embedded into the pressure limiting valve housing 41, the right end of the return spring 43 is supported in the right end of the pressure limiting valve housing counter bore 413, and the left end of the return spring 43 is abutted against the right end of the control piston 42. 4 unloading transverse holes 415 which transversely penetrate through the pressure limiting valve shell 41 are uniformly distributed at the right end, close to the middle partition plate 12, of the pressure limiting valve shell 41, an oil draining transverse hole 416 which transversely penetrates through the pressure limiting valve shell 41 up and down is formed at the left end, far away from the middle partition plate 12, of the pressure limiting valve shell 41, and the diameter of the unloading transverse hole 415 is larger than that of the oil draining transverse hole 416. The control piston 42 in the initial state of fig. 3 closes the unloading cross bore 415, and the oil drain cross bore 416 allows oil to enter the pressure limiting valve housing counterbore 413 to lubricate the return spring 43, thereby making the return spring 43 more responsive to action.
As shown in fig. 3 and 5, the control piston 42 of the pressure limiting valve 4 is provided with a symmetrical arcuate cutout 421 at an end thereof remote from the return spring 33, the arcuate cutout 421 communicating with the control piston counterbore 422. When the oil pressure of the oil inlet cavity 13 exceeds 0.65Mpa set by the return spring 43, the return spring 43 is compressed by the control piston 42 to open the oil unloading passage, so that the pressure oil of the oil inlet cavity 13 flows into the oil return cavity 14 through the control piston 42, the excessive oil pressure of the oil inlet cavity 13 is released, and the safety of a diesel engine lubricating system is ensured. The hole retainer ring 44 is radially embedded into the left end of the control piston counterbore 422, and is used for limiting the control piston 42 and preventing the control piston from being separated from the pressure limiting valve housing 41.
As shown in fig. 2 and 4, a lubricating oil pressure release buffer mechanism 33 is arranged between the junction of the large end shaft 321 and the small end shaft 322 of the pressure regulating piston 32 and the middle partition plate step hole 153, and comprises 4 slopes 323 radially and uniformly distributed at the junction of the large end shaft 321 and the small end shaft 322 of the pressure regulating piston 32, and the small end hole of the middle partition plate step hole 153 is matched with the large end shaft 321 of the pressure regulating piston 32. The large end shaft threaded end 325 is supported in the right end of the pressure regulator tube 11 and the middle threaded section 326 of the small end shaft 322 is supported in the pilot chamber sidewall through bore 152. When the pilot pressure lubricating oil pushes the pressure regulating piston 32 to move left from the two-dot chain line position of fig. 4 to open, the slope 323 has the function that the channel between the middle baffle plate step hole 153 and the large end shaft 321 is gradually opened, so that the conduction area between the lubricating oil inlet cavity 13 and the lubricating oil return cavity 14 is gradually increased, the impact of the pressure lubricating oil on the lubricating oil return cavity 14 is effectively avoided, and the reliability of the invention is improved. A layer of lubricating oil film is respectively stored between the threaded end 325 of the large end shaft and the inner hole of the pressure regulating pipe 11, and between the threaded section 326 of the middle end shaft 322 and the side wall through hole 152 of the pilot chamber, so that the pressure regulating piston 32 can be opened and closed more flexibly. The pressure regulating piston transverse hole 327 penetrates through the right end of the central stepped counter bore 324 of the pressure regulating piston 32, so that pressure lubricating oil can enter the central stepped counter bore 324 to lubricate the pressure regulating spring 24.
As shown in fig. 2, the left end of the pilot end cap 312 is respectively provided with 2 pilot transverse holes 314 communicated with the pilot cavity 151, so that the pressure oil can conveniently enter the pilot cavity 151 from the pilot control oil duct 311 to push the pressure regulating piston 32 to move left for opening.
As shown in fig. 1, the pressure oil outputted from the lubricating oil pump of the marine diesel engine enters the pilot control oil passage 311 through the input oil pipe 16, and flows in the following paths as indicated by the arrow in fig. 2: the pilot control oil duct 311, the pilot cavity 151, the pilot transverse hole 314 and the pilot end cover counter bore 313, so that the pressure regulating piston 32 is pushed to open in a left-moving manner, the influence of fluctuation of oil pressure of lubricating devices such as a filter and a cooler is avoided, the lubricating quality of the marine diesel engine is improved, and the safe and reliable operation of the marine diesel engine is ensured.
In addition to the above embodiments, other embodiments of the present invention are possible, and all technical solutions formed by equivalent substitution or equivalent transformation are within the scope of the present invention.
Claims (6)
1. The lubricating oil pressure regulating device of the marine diesel engine comprises a centrifugal filter support, a starting pressure regulating assembly and a pressure regulating valve assembly, wherein the centrifugal filter support is fixed on one side of a marine diesel engine body, the starting pressure regulating assembly and the pressure regulating valve assembly are connected to cross the middle of the centrifugal filter support in a front-back mode, the pressure regulating assembly is arranged on one side of the centrifugal filter support, and the starting pressure regulating assembly is arranged on the other side of the centrifugal filter support; the centrifugal filter support is of a box structure, a pressure regulating pipe with one end extending outwards horizontally is arranged in the middle of one side of the box, the pressure regulating end cover is fixed on the outer end port of the pressure regulating pipe, the pressure regulating spring seat is embedded into the outer end of an inner hole of the pressure regulating pipe, one end of a regulating screw screwed in the center of the pressure regulating end cover stretches into the pressure regulating pipe, and then abuts against a counter bore at one end of the pressure regulating spring seat, and the regulating screw is locked through the locking nut; one end of the pressure regulating spring is propped against one end of the pressure regulating spring seat, and a protective cover sleeved on the other end of the regulating screw is fixed outside the pressure regulating end cover; the diesel engine is characterized by further comprising a pressure limiting valve arranged at the lower side of the pressure regulating valve assembly, wherein the box body is divided into an oil inlet cavity and an oil return cavity at one corner of the box body by a right-angled middle partition plate, and an oil inlet pipe port and an oil return pipe port in the diesel engine body are respectively communicated with the oil inlet cavity and the oil return cavity of the corresponding centrifugal filter support;
the pressure regulating valve assembly comprises a pilot pressure regulating mechanism and a pressure regulating piston, the pressure regulating piston is of a stepped shaft structure, a central stepped counter bore is axially formed in one end of a large end shaft of the stepped shaft, the other end of a pressure regulating spring is propped against the bottom of a large end hole at one end of the central stepped counter bore, one end of the large end shaft is supported in a pressure regulating pipe, a pilot cavity is inwards extended from the side wall at one side of the box body, and one end of a small end shaft of the stepped shaft is supported in a side wall central hole of the pilot cavity; a lubricating oil pressure release buffer mechanism is arranged between the joint of the large end shaft and the small end shaft and the step hole at the upper part of the middle partition plate;
the pilot pressure regulating mechanism comprises a pilot control oil duct and a pilot end cover, wherein the lower end of the pilot control oil duct which is vertically arranged in the upper part of one side of the centrifugal filter support is communicated with the pilot chamber, and the upper end of the pilot control oil duct is connected with the output end of the lubricating oil pump of the marine diesel engine through an input oil pipe; one end of the small end shaft of the stepped shaft penetrates through the side wall of the pilot cavity and then is supported in a pilot end cover counter bore at one end of the pilot end cover, and the flange at the other end of the pilot end cover is fixed outside the other side of the box body.
2. The marine diesel oil pressure regulating device as claimed in claim 1, wherein the pressure limiting valve comprises a pressure limiting valve housing, a control piston, a return spring and a hole retainer ring, the pressure limiting valve housing is transversely arranged on the lower side of the pressure regulating piston, an open end shaft sleeve of the pressure limiting valve housing is supported on the middle partition plate, and the open end shaft sleeve is communicated with the oil inlet cavity through a counter bore of the pressure limiting valve housing; the closed end flange of the pressure limiting valve shell is fixed on the outer side surface of the side wall of the box body of the lubricating oil return cavity, the control piston is embedded into the pressure limiting valve shell, one end of the return spring is supported in one end of the counter bore of the pressure limiting valve shell, and the other end of the return spring is abutted against one end of the control piston; a plurality of unloading transverse holes which transversely penetrate through the pressure limiting valve shell are uniformly distributed at one end, close to the middle partition plate, of the pressure limiting valve shell, and oil draining transverse holes which transversely penetrate through the pressure limiting valve shell up and down are formed at the other end, far away from the middle partition plate, of the pressure limiting valve shell, and the diameter of each unloading transverse hole is larger than that of each oil draining transverse hole; the control piston in the initial state seals the unloading transverse hole; the check ring for the hole is radially embedded into one end of the counter bore of the control piston.
3. The marine diesel engine oil pressure regulating device as claimed in claim 1, wherein the oil pressure release buffer mechanism comprises a middle partition stepped hole and a plurality of slopes radially and uniformly distributed at the joint of a large end shaft and a small end shaft of the pressure regulating piston, the small end hole of the middle partition stepped hole is matched with the large end shaft of the pressure regulating piston, a threaded end of the large end shaft is supported in one end of the pressure regulating pipe, and a middle threaded section of the small end shaft is supported in a through hole of a side wall of the pilot chamber.
4. The marine diesel oil pressure regulating device as claimed in claim 1, wherein one end of the pilot end cover counter bore is provided with a plurality of pilot cross holes communicated with the pilot cavity.
5. The marine diesel oil pressure regulating device as claimed in claim 1, wherein one end of the regulating screw is a spherical surface, and the spherical surface is abutted against a bottom conical surface of a counter bore at one end of the pressure regulating spring seat.
6. The marine diesel oil pressure regulating device as claimed in claim 2, wherein the control piston of the pressure limiting valve is provided with symmetrical arcuate cutouts at an end thereof remote from the return spring, the arcuate cutouts communicating with the control piston counterbore.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311603345.1A CN117404154A (en) | 2023-11-28 | 2023-11-28 | Lubricating oil pressure regulating device for marine diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311603345.1A CN117404154A (en) | 2023-11-28 | 2023-11-28 | Lubricating oil pressure regulating device for marine diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117404154A true CN117404154A (en) | 2024-01-16 |
Family
ID=89490996
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311603345.1A Pending CN117404154A (en) | 2023-11-28 | 2023-11-28 | Lubricating oil pressure regulating device for marine diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117404154A (en) |
-
2023
- 2023-11-28 CN CN202311603345.1A patent/CN117404154A/en active Pending
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