CN214838649U - Common rail pipe and pressure limiting valve for same - Google Patents
Common rail pipe and pressure limiting valve for same Download PDFInfo
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- CN214838649U CN214838649U CN202120559261.2U CN202120559261U CN214838649U CN 214838649 U CN214838649 U CN 214838649U CN 202120559261 U CN202120559261 U CN 202120559261U CN 214838649 U CN214838649 U CN 214838649U
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- common rail
- pressure limiting
- pressure
- limiting valve
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Abstract
The utility model discloses a pressure limiting valve for common rail, include: the valve body is provided with an oil return hole; the valve seat is arranged on the valve body and forms an accommodating cavity with the valve body, and an oil outlet flow passage is formed in the valve seat; the valve core is arranged on the oil outlet flow passage and used for controlling the connection or disconnection of the oil outlet flow passage; and the elastic component is arranged in the accommodating cavity, one end of the elastic component props against the valve body, and the other end of the elastic component props against the valve core. The common rail pipe is provided with the pressure limiting valve for the common rail pipe. The embodiment of the utility model provides a pressure limiting valve for common rail can maintain the intraductal settlement pressure of common rail again when can carrying out safe pressure release, lets the fault vehicle can limp the pressure limiting valve of going home, and this valve simple structure is compact, and installation space is little, with low costs, be convenient for install fast and change.
Description
Technical Field
The utility model relates to a valve structure technical field especially relates to a common rail is with voltage limiting valve and common rail pipe.
Background
With increasingly stringent emissions regulations, high pressure common rail fuel injection systems have become the best choice for diesel engines to meet higher emission standards. One of the main characteristics is the waveform home function, namely, after some electronic components of an engine electric control system fail and fail in the running process of an automobile, the engine cannot be stopped under most conditions, but enters a degradation mode, the engine still keeps running, only the output power of the engine is limited, and therefore the automobile is ensured to run to a safe zone or a nearest maintenance station. This requires that the pressure limiting valve installed on the common rail pipe not only can release pressure to maintain the stability of the pressure in the common rail pipe, but also cannot completely remove the pressure in the common rail pipe, and the stability of the pressure required by the limping function of the engine needs to be maintained.
The conventional pressure limiting valve is mostly a switch valve, pressure is directly and completely removed, or a two-stage opening mode is adopted, or a mode that the pressure limiting valve is integrated with an oil return interface is adopted, parts connected with the pressure limiting valve need to be firstly removed during installation, the needed installation space is large, and replacement time is long.
Therefore, the existing related pressure limiting valve has the problems that the pressure in the common rail pipe is not completely discharged when the pressure relief cannot be realized, and the pressure in the common rail pipe can be maintained to be stable.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a common rail is with pressure limiting valve and common rail pipe is provided to solve present relevant pressure limiting valve and exist when unable realizing the pressure release common rail intraductal pressure and not all unload and can maintain the stable problem of common rail intraductal pressure.
The utility model discloses an aspect provides a pressure limiting valve for common rail pipe, include: the valve body is provided with an oil return hole; the valve seat is arranged on the valve body and forms an accommodating cavity with the valve body, and an oil outlet flow passage is formed in the valve seat; the valve core is arranged on the oil outlet flow passage and used for controlling the connection or disconnection of the oil outlet flow passage; and the elastic component is arranged in the accommodating cavity, one end of the elastic component props against the valve body, and the other end of the elastic component props against the valve core.
Further, the elastic member includes at least a spring.
Further, the elastic component further comprises a pressure regulating gasket, and the pressure regulating gasket is located between the spring and the valve core.
Furthermore, the pressure regulating gasket is provided with a through hole.
Further, the through holes are provided in plurality, and the plurality of through holes are evenly distributed in the circumferential direction.
Further, the valve seat and the valve body are fixed into a whole in a riveting mode.
Further, the valve body is provided with threads for connecting to a common rail pipe.
Furthermore, a first annular groove for installing an O-shaped sealing ring is formed in the valve body.
Further, the valve core sequentially comprises a contact part, a control part and a sealing part from top to bottom, the contact part is abutted with the elastic part in a point contact mode, the contact part and the sealing part are both in a spherical or fan-shaped cone mode, and a leakage channel is formed between the control part and the oil outlet flow channel.
According to the utility model discloses the second aspect of the embodiment provides a common rail pipe, install the first aspect on the common rail pipe the pressure limiting valve for common rail pipe.
The embodiment of the utility model provides a technical scheme can include following beneficial effect:
it can be known from the above embodiments that, in this embodiment, an elastic component is installed in the accommodation cavity formed by the valve body in the valve seat, and the elastic force is provided to the valve core by the elastic component, so as to control the connection or disconnection of the oil outlet flow passage by the valve core, thereby enabling safe pressure relief to be performed while maintaining the set pressure in the common rail pipe, and enabling a faulty vehicle to become a limp home pressure limiting valve, thereby solving the problem that the pressure in the common rail pipe is not completely removed and the pressure in the common rail pipe is stable when the pressure relief cannot be performed in the existing related pressure limiting valve.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as claimed.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is to be understood that the drawings in the following description are illustrative of specific embodiments of the invention and are not to be construed as limiting the scope of the invention. It is obvious to a person skilled in the art that other embodiments and drawings can of course be obtained from the following embodiments of the invention and their drawings without inventive work.
Fig. 1 is a sectional view of a pressure limiting valve for a common rail according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a valve body of a pressure limiting valve for a common rail according to an embodiment of the present invention;
fig. 3 is a schematic view of a valve seat of a pressure limiting valve for a common rail according to an embodiment of the present invention, wherein (a) and (b) are schematic views of the valve seat at different angles;
fig. 4 is a schematic structural diagram of a valve element of a pressure limiting valve for a common rail according to an embodiment of the present invention, wherein (a) and (b) are schematic structural diagrams of the valve element at different angles;
in the figure: the pressure-regulating valve comprises a spring 1, a valve body 2, a pressure-regulating gasket 3, a valve seat 4, a valve core 5, an O-shaped sealing ring 6, an oil return hole 201, a clamping position 202, a limiting groove 401, a sealing ring surface 402, a contact part 501, a milled flat 502 and a sealing part 503.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
It is to be understood that although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, the first information may also be referred to as second information, and similarly, the second information may also be referred to as first information, without departing from the scope of the present invention. The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination", depending on the context.
Fig. 1 is a structural cross-sectional view of a pressure limiting valve for a common rail according to an embodiment of the present invention, and the embodiment provides a pressure limiting valve for a common rail, which may include: the oil outlet valve comprises a valve body 2, a valve seat 4, a valve core 5 and an elastic component, wherein an oil return hole 201 is formed in the valve body 2, the valve seat 4 is installed on the valve body 2 and forms an accommodating cavity with the valve body 2, an oil outlet flow passage is formed in the valve seat 4, the valve core 5 is installed on the oil outlet flow passage and used for controlling the on-off of the oil outlet flow passage, the elastic component is arranged in the accommodating cavity, one end of the elastic component abuts against the valve body 2, and the other end of the elastic component abuts against the valve core 5.
It can be known from the above embodiments that, in this embodiment, an elastic component is installed in the accommodation cavity formed by the valve body 2 and the valve seat 4, and the elastic component provides elastic force for the valve core 5 to control the connection or disconnection of the oil outlet flow passage, so that the valve core 5 can safely release pressure and maintain the set pressure in the common rail pipe, and a fault vehicle can get home, thereby solving the problem that the pressure in the common rail pipe is not completely removed when the pressure release cannot be realized in the existing related pressure limiting valve, and the pressure limiting valve for the common rail pipe of this embodiment can maintain the pressure in the common rail pipe to be stable.
In this embodiment, referring to fig. 1, the elastic component at least includes a spring 1, and the elastic component further includes a pressure regulating gasket 3, where the pressure regulating gasket 3 is located between the spring 1 and the valve core 5. Further, the pressure adjusting pad 3 is provided with a through hole. Preferably, the through-hole has a plurality of, and a plurality of the through-holes are evenly distributed along the circumferential direction. The pressure regulating gasket 3 is provided with uniformly distributed through holes, so that the fuel oil circulation area is increased, the fuel oil circulation is prevented from being blocked, and the pressure limiting valve is more stable in work. The pressure regulating gasket 3 is graded, and the stress of the spring is accurately controlled, so that the opening pressure and the flow of the pressure limiting valve are accurately controlled.
In this embodiment, referring to fig. 1 to 3, the valve body 2 may be provided with a blind hole for accommodating the spring 1 and a ring groove for accommodating the O-ring 6, the side wall of the valve body 2 may be provided with oil return holes 201 uniformly distributed, and the oil return holes 201 are communicated with the blind hole. The valve body 2 is provided with threads for connection to a common rail pipe. An oil outlet flow channel for installing the valve core 5 and a groove for containing the pressure regulating gasket 3 can be formed in the valve seat 4, and the through hole is in clearance fit with the valve core 5. The clamping position 202 on the valve body 2 and the limiting groove 401 on the valve seat 4 are fixed into a whole in a riveting or flanging mode, so that parts are prevented from scattering, the quick replacement and the installation are facilitated, and the sealing ring surface 402 on the valve body 4 is mutually interacted with the common rail pipe in a wedging type sealing or end face sealing mode to realize high-pressure sealing.
The both ends of pressure regulating gasket 3 respectively with case 5 with 1 looks butt of spring, under the prerequisite that satisfies the required performance of product and intensity, make full use of other parts are arranged in the space of valve body 2 and disk seat 3, make its product compact structure, required installation space is little, just valve body 2 and disk seat 4 all can adopt solid of revolution structural design, simple structure need not special preparation frock clamp, processing convenient and fast, machining efficiency is high, and is with low costs.
In this embodiment, referring to fig. 4, the valve core 5 sequentially includes a contact portion 501, a control portion 502, and a sealing portion 503 from top to bottom, and the contact portion 501 is in contact with the pressure regulating gasket 3 in a point contact manner, so as to prevent parts from being constrained by each other due to stress, so that part clamping stagnation is prevented, and product performance is affected; the contact part 501 and the sealing part 503 are both in a spherical or fan-shaped cone mode, so that the valve core 5 is prevented from generating lateral component force when being seated, and cannot be seated quickly and accurately, and the stable work of the valve core is prevented from being influenced. In this embodiment, the control portion may be a milling flat 502, the milling flat 502 may be a plurality of uniformly distributed inclined surface structures, a plurality of uniformly distributed leakage passages are formed between the milling flat 502 and an oil outlet flow passage of the valve core 5 mounted on the valve seat 4, and the lift and the flow cross-sectional area of the valve core 5 are controlled by adjusting the angle of the milling flat 502 (in this example, 0-5 degrees is adopted, but not limited thereto) and the ratio of the inclined surface to the optical axis length, so that the pressure and the flow of the pressure limiting valve are accurately controlled, the requirements of the switching valve and the pressure flow control are taken into consideration, and the pressure and flow setting of limping home is met.
The pressure limiting valve for the common rail pipe preferably adopts a self-centering and uniformly-distributed structural design, so that the stress among parts is uniform, the stable work of the pressure limiting valve is facilitated, the abrasion among the parts is reduced, and the service life of a product is prolonged.
The working principle of the pressure limiting valve for the common rail pipe is as follows: when the system pressure is higher than the set system pressure, the valve core 5 of the pressure limiting valve for the common rail is opened, fuel oil flows out through the flow section between the valve seat 4 and the valve core 5, the through hole on the pressure regulating gasket 3, the blind hole on the valve body 2 and the oil return hole 201 in sequence, and the valve core recovers seating and sealing after the overhigh pressure is removed; when the limp home function of the system is started, the valve core 5 of the pressure limiting valve is opened, the limp home pressure set by the system is maintained, redundant fuel oil is discharged, and the vehicle can continue to stably work and run to a safety zone.
The embodiment also provides a common rail pipe, and the common rail pipe is provided with the pressure limiting valve for the common rail pipe. It has all the effects of a pressure limiting valve for common rail, which is not described in detail here.
The above description is only the preferred embodiment of the present invention, and those skilled in the art can understand or implement the present invention based on the above description. Various modifications to the above-described embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the particular embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A pressure limiting valve for a common rail, comprising:
the valve body is provided with an oil return hole;
the valve seat is arranged on the valve body and forms an accommodating cavity with the valve body, and an oil outlet flow passage is formed in the valve seat;
the valve core is arranged on the oil outlet flow passage and used for controlling the connection or disconnection of the oil outlet flow passage;
and the elastic component is arranged in the accommodating cavity, one end of the elastic component props against the valve body, and the other end of the elastic component props against the valve core.
2. The pressure limiting valve for a common rail according to claim 1, wherein the elastic member comprises at least a spring.
3. The pressure limiting valve for a common rail of claim 2, wherein the elastic member further comprises a pressure regulating gasket, and the pressure regulating gasket is located between the spring and the spool.
4. The pressure limiting valve for a common rail according to claim 3, wherein the pressure regulating spacer is formed with a through hole.
5. The pressure limiting valve for a common rail according to claim 4, wherein the through hole has a plurality of through holes, and the plurality of through holes are uniformly distributed in a circumferential direction.
6. The pressure limiting valve for a common rail according to claim 1, wherein the valve seat and the valve body are fixed into a whole by riveting.
7. The pressure limiting valve for a common rail of claim 1, wherein the valve body has threads thereon for attachment to a common rail.
8. The pressure limiting valve for a common rail according to claim 1, wherein the valve body is provided with a first ring groove for mounting an O-ring.
9. The pressure limiting valve for the common rail according to claim 1, wherein the valve core comprises a contact portion, a control portion and a sealing portion in sequence from top to bottom, the contact portion is abutted with the elastic component in a point contact manner, the contact portion and the sealing portion are both in a spherical or fan-shaped cone manner, and a leakage channel is formed between the control portion and the oil outlet flow channel.
10. A common rail pipe, characterized in that the common rail pipe is provided with a pressure limiting valve for a common rail pipe according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120559261.2U CN214838649U (en) | 2021-03-18 | 2021-03-18 | Common rail pipe and pressure limiting valve for same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120559261.2U CN214838649U (en) | 2021-03-18 | 2021-03-18 | Common rail pipe and pressure limiting valve for same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214838649U true CN214838649U (en) | 2021-11-23 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120559261.2U Active CN214838649U (en) | 2021-03-18 | 2021-03-18 | Common rail pipe and pressure limiting valve for same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214838649U (en) |
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2021
- 2021-03-18 CN CN202120559261.2U patent/CN214838649U/en active Active
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Effective date of registration: 20230526 Address after: 225500 No. 1, Shuguang Middle Road, Baimi Town, Jiangyan District, Taizhou City, Jiangsu Province Patentee after: Junfeng electric control technology (Taizhou) Co.,Ltd. Address before: Room 211, building 21, 1158 Jiuting Central Road, Jiuting Town, Songjiang District, Shanghai, 201615 Patentee before: Shanghai Junfeng Electric Control Technology Co.,Ltd. |