CN212130575U - Engine and engine body combined structure of auxiliary oil passage pressure limiting valve of engine - Google Patents
Engine and engine body combined structure of auxiliary oil passage pressure limiting valve of engine Download PDFInfo
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- CN212130575U CN212130575U CN202020831804.7U CN202020831804U CN212130575U CN 212130575 U CN212130575 U CN 212130575U CN 202020831804 U CN202020831804 U CN 202020831804U CN 212130575 U CN212130575 U CN 212130575U
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Abstract
The utility model discloses a combination structure of an engine auxiliary oil duct pressure limiting valve and a machine body and an engine, wherein the combination structure of the engine auxiliary oil duct pressure limiting valve and the machine body comprises a machine body, and a main oil duct and an auxiliary oil duct are arranged on the machine body; the engine oil pressure limiting valve is used for communicating or cutting off the main oil passage and the auxiliary oil passage; the engine body is provided with an installation cavity for installing the engine oil pressure limiting valve, an oil inlet of the engine oil pressure limiting valve is communicated with the main oil duct, and an oil outlet of the engine oil pressure limiting valve is communicated with the auxiliary oil duct. The engine comprises the structure for combining the engine auxiliary oil passage pressure limiting valve with the engine body. The utility model discloses simple structure, processing installation easy maintenance, and can make engine oil carry out reasonable lubrication, cooling distribution.
Description
Technical Field
The utility model belongs to the technical field of the engine, especially, relate to an engine auxiliary oil duct pressure limiting valve and organism integrated configuration and engine.
Background
The engine body of the engine is provided with a main oil duct for lubricating core components such as a main shaft bush, a connecting rod bush, a camshaft and the like. In order to improve the fuel economy and the power performance of the engine, new technologies such as turbocharging, direct injection in a cylinder, high compression ratio and the like are widely applied, so that the strengthening degree of the engine is higher and higher, and the thermal load borne by a piston is larger and larger; in order to effectively reduce the heat load of the piston and ensure the working reliability of the piston, most modern engines are provided with piston cooling devices, and the bottom of the piston is cooled in a mode of injecting engine oil. Many engines have a secondary oil duct (branch) in communication with the main oil duct, and the secondary oil duct is provided with an engine piston cooling device (piston cooling nozzle) to spray oil and cool and lubricate the piston.
Generally, when the engine is in a starting or low-speed running state, the oil pressure is low; the piston is also in a lower temperature state, and oil does not need to be sprayed at the bottom of the piston for cooling. When the piston temperature is higher and the bottom-spraying oil is needed to be cooled, the engine speed is also in a higher state, and the oil pressure is correspondingly higher (than in an idling state). There is therefore a need for effective cooling of the piston while ensuring lubrication of the core components.
At present, an auxiliary oil passage is directly communicated with a main oil passage, and under a certain working condition (when an engine rotates at a low speed or is just started), the pressure of the main oil passage cannot be ensured due to the shunting action of the auxiliary oil passage, so that effective lubrication of core components cannot be ensured at first.
In view of this, it is necessary to improve the prior art and to develop a combination structure of the engine oil passage pressure limiting valve and the engine body, which can perform reasonable lubrication and cooling distribution on the engine oil, so as to ensure the reliability of use.
SUMMERY OF THE UTILITY MODEL
Aiming at overcoming the defects existing in the prior art, the utility model provides a first technical problem be, provide an engine auxiliary oil duct pressure limiting valve and organism integrated configuration, its simple structure, processing installation easy maintenance, and can make engine oil carry out reasonable lubrication, cooling distribution.
As same technical conception, the utility model provides a second technical problem be, provide an engine.
The utility model provides a technical scheme that above-mentioned first technical problem adopted is: a structure for combining an auxiliary oil passage pressure limiting valve of an engine with a machine body comprises the machine body, wherein a main oil passage and an auxiliary oil passage are formed in the machine body; the engine oil pressure limiting valve is used for communicating or cutting off the main oil passage and the auxiliary oil passage;
the engine body is provided with an installation cavity for installing the engine oil pressure limiting valve, an oil inlet of the engine oil pressure limiting valve is communicated with the main oil duct, and an oil outlet of the engine oil pressure limiting valve is communicated with the auxiliary oil duct.
As a further improvement, the engine oil pressure limiting valve comprises a valve body with openings at two ends, one end of the valve body, which is positioned outside the machine body, is provided with an opening pressure adjusting unit, a steel ball, an adjusting spring and a plunger piston are sequentially arranged in the valve body from bottom to top, and the plunger piston is abutted against the bottom end of the opening pressure adjusting unit;
an opening at one end of the valve body, which is positioned in the machine body, is the oil inlet; the side wall of the valve body is provided with the oil outlet; when the engine oil pressure acting on the steel ball is smaller than the opening pressure, the steel ball blocks the oil outlet, and the main oil duct is communicated with the auxiliary oil duct in a cutting mode; when the engine oil pressure acting on the steel ball is larger than the opening pressure, the steel ball is separated from the oil outlet, and the main oil duct is communicated with the auxiliary oil duct.
As a further improvement, the opening pressure adjusting unit comprises an adjusting bolt and a gasket which are screwed at one end of the valve body; the gasket is clamped between the lower end face of the head of the adjusting bolt and the upper end face of the valve body.
As a further improvement, the valve body is provided with a stepped inner hole, a large-caliber section and a small-caliber section are sequentially arranged from top to bottom, and the joint of the small-caliber section and the large-caliber section is used for limiting the steel ball.
As a further improvement, the cross section of the valve body is of a T-shaped structure and comprises a limiting part and a mounting part which is vertical to the limiting part;
the limiting part is positioned outside the machine body, and a sealing ring is arranged between the limiting part and the machine body; the installation part extends into the machine body.
As a further improvement, the mounting portion includes a first mounting section, a second mounting section, and a third mounting section;
the bottom end of the first mounting section is provided with a tapered opening used for being connected with the second mounting section;
the oil outlet is arranged on the side wall of the second mounting section.
As a further improvement, an O-shaped sealing ring is arranged between the third mounting section and the inner wall of the mounting cavity.
As a further improvement, the second mounting section is also provided with a through hole which is arranged opposite to the oil outlet; and the machine body is provided with a square-head conical threaded plug for plugging the through hole.
As a further improvement, the lower end of the plunger is of a step-shaped structure, and the adjusting spring abuts against the step end face.
The utility model provides a technical scheme that above-mentioned second technical problem adopted is: the engine comprises the combination structure of the engine auxiliary oil passage pressure limiting valve and the engine body.
Due to the adoption of the technical scheme, the beneficial effects are as follows:
the utility model discloses a structure combining an engine auxiliary oil duct pressure limiting valve and a machine body, wherein the machine body is provided with a main oil duct and an auxiliary oil duct, and an engine oil pressure limiting valve for communicating or cutting off the main oil duct and the auxiliary oil duct is arranged in an installation cavity of the machine body; the oil inlet of the engine oil pressure limiting valve is communicated with the main oil duct, and the oil outlet of the engine oil pressure limiting valve is communicated with the auxiliary oil duct. The opening pressure of the engine oil pressure limiting valve can be 0.15-0.2 MPa; when the engine is just started or runs at low speed, the oil pressure of the main oil duct is low, the opening pressure of the oil pressure limiting valve cannot be reached, the oil pressure limiting valve is closed, the main oil duct and the auxiliary oil duct are cut off and communicated, and the oil is only used by the main oil duct, so that the pressure of the main oil duct is effectively ensured, and the timely and effective lubrication of core components such as a main shaft bush, a connecting rod bush, a camshaft and the like is ensured. When the rotating speed of the engine is increased, the oil pressure of the main oil duct is increased to reach the opening pressure of the oil pressure limiting valve, the oil pressure limiting valve is opened, the main oil duct is communicated with the auxiliary oil duct, and the oil enters the auxiliary oil duct to spray oil to the bottom of the piston for cooling. The auxiliary oil passage pressure limiting valve and the engine body are simple in combined structure, reliable to use, convenient to machine, install and maintain and capable of enabling engine oil to be reasonably lubricated and cooled and distributed.
In conclusion, the engine auxiliary oil passage pressure limiting valve is simple in structure combined with the engine body, convenient to machine, install and maintain, capable of reasonably lubricating and cooling engine oil and capable of improving reliability.
Drawings
FIG. 1 is a partial schematic view of a combination structure of a pressure limiting valve and a body of an auxiliary oil passage of an engine according to the present invention;
FIG. 2 is a sectional view taken along line A-A of FIG. 1;
FIG. 3 is an enlarged partial schematic view of FIG. 1;
FIG. 4 is a reference view of FIG. 2 in another state;
in the figure: 1-machine body, 2-main oil gallery, 3-auxiliary oil gallery, 4-machine oil pressure limiting valve, 41-valve body, 411-oil inlet, 412-oil outlet, 413-large-diameter section, 414-small-diameter section, 42-opening pressure adjusting unit, 421-adjusting bolt, 422-gasket, 43-steel ball, 44-adjusting spring, 45-plunger, 46-square-head conical threaded plug, 5-sealing ring and 6-O-shaped sealing ring.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the described embodiments of the present invention are for simplicity of description only and are not to be construed as limiting the present invention.
The first embodiment is as follows:
as shown in fig. 1 to 4, the embodiment discloses a combination structure of a pressure limiting valve of an auxiliary oil passage of an engine and an engine body, which comprises an engine body 1 and an engine oil pressure limiting valve 4; the machine body 1 is provided with a main oil duct 2 and an auxiliary oil duct 3; the engine oil pressure limiting valve 4 is used for communicating or cutting off the main oil gallery 2 and the auxiliary oil gallery 3; the machine body 1 is provided with a mounting cavity for mounting the machine oil pressure limiting valve 4, an oil inlet 411 of the machine oil pressure limiting valve 4 is communicated with the main oil gallery 2, and an oil outlet 412 is communicated with the auxiliary oil gallery 3.
In this embodiment, the engine oil pressure limiting valve 4 includes a valve body 41 with openings at two ends, one end of the valve body 41 located outside the engine body 1 is provided with an opening pressure adjusting unit 42, and a steel ball 43, an adjusting spring 44 and a plunger 45 are sequentially installed in the valve body 41 from bottom to top; the lower end of the plunger 45 is in a step-shaped structure, and the adjusting spring 44 abuts against the end face of the step. The upper end of the plunger 45 abuts against the bottom end of the opening pressure adjusting unit 42.
An opening at one end of the valve body 41 in the machine body 1 is an oil inlet 411; the oil outlet 412 is provided on the side wall of the valve body 41; when the engine oil pressure acting on the steel ball 43 is smaller than the opening pressure, the steel ball 43 blocks the oil outlet 412, and the main oil duct 2 is communicated with the auxiliary oil duct 3 in a cutting mode; when the oil pressure acting on the steel ball 43 is greater than the opening pressure, the steel ball 43 is separated from the oil outlet 412, and the main oil gallery 2 is communicated with the auxiliary oil gallery 3.
Wherein, the opening pressure adjusting unit 4 includes an adjusting bolt 421 and a washer 422 which are screwed on one end of the valve body 41; the washer 422 is interposed between the head lower end surface of the adjusting bolt 421 and the upper end surface of the valve body 41. The adjustment of the pre-tightening force of the adjusting spring 44 and thus the opening pressure is achieved by replacing washers 422 of different thicknesses.
Wherein, the valve body 41 is provided with a stepped inner hole which is a large-caliber section 413 and a small-caliber section 414 from top to bottom; in the closed state, the joint (step) between the small-diameter section 414 and the large-diameter section 413 of the steel ball 43 restricts the steel ball 43 to prevent the steel ball 43 from falling off.
In this embodiment, the installation is convenient, and the cross section of the valve body 41 is designed to be a T-shaped structure, and includes a limiting portion and an installation portion perpendicular to the limiting portion; the limiting part is positioned outside the machine body 1, and a sealing ring 5 is arranged between the limiting part and the machine body 1; the mounting portion extends into the body 1. The method specifically comprises the following steps: the washer 422 is interposed between the head lower end surface of the adjusting bolt 421 and the upper end surface of the stopper portion of the valve body 41.
The mounting part comprises a first mounting section, a second mounting section and a third mounting section; the bottom end of the first mounting section is provided with a tapered opening used for being connected with the second mounting section; an oil outlet 412 is provided on a side wall of the second mounting section. An O-shaped sealing ring 6 is arranged between the third mounting section and the inner wall of the mounting cavity of the machine body 1. The second mounting section is also provided with a through hole which is arranged opposite to the oil outlet 412; a square-head conical threaded plug 46 for plugging the through hole is arranged on the machine body 1; preventing the leakage of the engine oil.
The working principle is as follows:
as shown in fig. 2 and 4, when the engine is just started or runs at a low speed, the oil pressure of the main oil gallery 2 is low, the opening pressure of the oil pressure limiting valve 4 cannot be reached, the oil pressure limiting valve 4 is closed, namely the oil pressure acting on the steel ball 43 is smaller than the opening pressure, the steel ball 43 blocks the oil outlet 412, and the main oil gallery 2 is disconnected from the auxiliary oil gallery 3; the engine oil is only used for the main oil gallery 2, so that the pressure of the main oil gallery is effectively ensured, and the timely and effective lubrication of the main shaft bush, the connecting rod bush, the camshaft and other core components is ensured. When the engine speed is increased, the oil pressure of the main oil gallery is increased to reach the opening pressure of the oil pressure limiting valve, the oil pressure limiting valve is opened, namely when the oil pressure acting on the steel ball 43 is greater than the opening pressure, the steel ball 43 is separated from the oil outlet 412, and the main oil gallery 2 is communicated with the auxiliary oil gallery 3. The engine oil enters the auxiliary oil passage 3 and starts to spray the engine oil to the bottom of the piston for cooling.
Example two:
the embodiment discloses an engine provided with the combined structure of the auxiliary oil passage pressure limiting valve and the engine body, and other parts of the engine are not improved and are not described herein.
In conclusion, the combination structure of the engine auxiliary oil passage pressure limiting valve and the engine body is simple, the use is reliable, the processing, the installation and the maintenance are convenient, and the engine oil can be reasonably lubricated and cooled and distributed.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A structure for combining an auxiliary oil passage pressure limiting valve of an engine with a machine body comprises the machine body, wherein a main oil passage and an auxiliary oil passage are formed in the machine body; the oil pressure limiting valve is characterized by further comprising an engine oil pressure limiting valve for communicating or cutting off the main oil gallery and the auxiliary oil gallery;
the engine body is provided with an installation cavity for installing the engine oil pressure limiting valve, an oil inlet of the engine oil pressure limiting valve is communicated with the main oil duct, and an oil outlet of the engine oil pressure limiting valve is communicated with the auxiliary oil duct.
2. The structure for combining the pressure limiting valve of the auxiliary oil passage of the engine with the engine body as claimed in claim 1, wherein the oil pressure limiting valve comprises a valve body with openings at two ends, one end of the valve body, which is located outside the engine body, is provided with an opening pressure adjusting unit, a steel ball, an adjusting spring and a plunger are sequentially mounted in the valve body from bottom to top, and the plunger is abutted against the bottom end of the opening pressure adjusting unit;
an opening at one end of the valve body, which is positioned in the machine body, is the oil inlet; the side wall of the valve body is provided with the oil outlet; when the engine oil pressure acting on the steel ball is smaller than the opening pressure, the steel ball blocks the oil outlet, and the main oil duct is communicated with the auxiliary oil duct in a cutting mode; when the engine oil pressure acting on the steel ball is larger than the opening pressure, the steel ball is separated from the oil outlet, and the main oil duct is communicated with the auxiliary oil duct.
3. The engine auxiliary oil passage pressure limiting valve and engine body combination structure as claimed in claim 2, wherein the opening pressure adjusting unit includes an adjusting bolt and a washer which are screwed on one end of the valve body; the gasket is clamped between the lower end face of the head of the adjusting bolt and the upper end face of the valve body.
4. The combination structure of the pressure limiting valve and the engine body of the engine auxiliary oil passage as claimed in claim 2, wherein the valve body is provided with a stepped inner hole which is a large-diameter section and a small-diameter section from top to bottom, and the joint of the small-diameter section and the large-diameter section is used for limiting the steel ball.
5. The structure for combining the pressure limiting valve of the auxiliary oil passage of the engine with the engine body as claimed in claim 2, wherein the cross section of the valve body is of a T-shaped structure and comprises a limiting part and a mounting part which is perpendicular to the limiting part;
the limiting part is positioned outside the machine body, and a sealing ring is arranged between the limiting part and the machine body; the installation part extends into the machine body.
6. The engine auxiliary oil passage pressure limiting valve and engine body combination structure according to claim 5, wherein the mounting portion comprises a first mounting section, a second mounting section and a third mounting section;
the bottom end of the first mounting section is provided with a tapered opening used for being connected with the second mounting section;
the oil outlet is arranged on the side wall of the second mounting section.
7. The combination structure of the auxiliary oil passage pressure limiting valve and the engine body as claimed in claim 6, wherein an O-shaped sealing ring is arranged between the third mounting section and the inner wall of the mounting cavity.
8. The combination structure of the pressure limiting valve of the auxiliary oil passage of the engine and the engine body as claimed in claim 6, wherein the second mounting section is further provided with a through hole which is arranged opposite to the oil outlet; and the machine body is provided with a square-head conical threaded plug for plugging the through hole.
9. The combination structure of the pressure limiting valve of the auxiliary oil passage of the engine and the engine body as claimed in claim 2, wherein the lower end of the plunger is in a step-shaped structure, and the adjusting spring abuts against the end surface of the step.
10. An engine, characterized by comprising the combination structure of the auxiliary oil passage pressure limiting valve of the engine as claimed in any one of claims 1 to 9 and the engine body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020831804.7U CN212130575U (en) | 2020-05-18 | 2020-05-18 | Engine and engine body combined structure of auxiliary oil passage pressure limiting valve of engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020831804.7U CN212130575U (en) | 2020-05-18 | 2020-05-18 | Engine and engine body combined structure of auxiliary oil passage pressure limiting valve of engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212130575U true CN212130575U (en) | 2020-12-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020831804.7U Active CN212130575U (en) | 2020-05-18 | 2020-05-18 | Engine and engine body combined structure of auxiliary oil passage pressure limiting valve of engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212130575U (en) |
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2020
- 2020-05-18 CN CN202020831804.7U patent/CN212130575U/en active Active
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