CN204060841U - A kind of motor and pressure-limit valve thereof - Google Patents
A kind of motor and pressure-limit valve thereof Download PDFInfo
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- CN204060841U CN204060841U CN201420417617.9U CN201420417617U CN204060841U CN 204060841 U CN204060841 U CN 204060841U CN 201420417617 U CN201420417617 U CN 201420417617U CN 204060841 U CN204060841 U CN 204060841U
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Abstract
The utility model discloses a kind of motor and pressure-limit valve thereof, comprise valve body, be located at spool in described valve body and spring, described spool is coordinated with described valve body slides by described spring, described valve body is provided with oil leak hole and oil inlet hole, and described oil inlet hole is communicated with described spring-compressed with described oil leak hole, disconnect with described recoil of spring; Described spring is variable rate spring, and the rigidity of described variable rate spring near described spool one end is less than the rigidity away from described spool one end.Because this spring adopts variable rate spring, and the rigidity of close spool side is less, when there is fluctuation in main oil gallery pressure, the rebound velocity of spool slows down, restrained effectively the fluctuation caused because rigidity is large in the valve body of spool, avoid spring and motor self-vibration to produce resonating and cause the phenomenon of spring breakage, substantially prolongs the working life of spring, improve the functional reliability of pressure-limit valve.The utility model also discloses a kind of motor applying above-mentioned pressure-limit valve.
Description
Technical field
The utility model relates to automobile technical field, particularly relates to a kind of motor and pressure-limit valve thereof.
Background technique
Pressure-limit valve is installed in the lubricating oil path of motor, and when engine oil pressure exceeds the cracking pressure of pressure-limit valve, pressure-limit valve can be opened, and releases a part of lubricant oil, to make the engine oil pressure of diesel engine keep balance, is unlikely to too high.
Pressure-limit valve generally includes valve body, spool and valve seat, and spool is connected to valve inner by spring slide.When the engine oil pressure in motor main oil gallery is too high, lubricating oil pressure promotes spool forward and moves and then promote spring-compressed, and the main oil gallery of motor is communicated with oil leak hole, and unnecessary lubricant oil is released from oil leak hole.When the oil pressure pressure acted on spool of the main oil gallery of motor is less than spring force, recoil of spring, promotes spool oppositely movement, closes oil leak hole, thus keeps oil pressure relatively stable.
In prior art, above-mentioned spring adopts constant-rate spring usually, in working procedure, when spool is opened along with the displacement of spool increases, the spring force overcome increases sharply, when the elastic force of spring is greater than fluid pressure, and the rapid return of spool, so repeatedly, cause the vibration of spool comparatively large, the natural frequency of vibration of spring and motor easily resonates, thus causes spring breakage, pressure-limit valve lost efficacy, and there is potential safety hazard.
In view of this, urgently for above-mentioned technical problem, further optimal design is done to the pressure-limit valve of motor of the prior art, reduce the fluctuation that spool produces, extend the working life of pressure-limit valve, avoid potential safety hazard.
Model utility content
The purpose of this utility model is for providing a kind of pressure-limit valve of motor, and the spring of this pressure-limit valve adopts variable rate spring, reduces the fluctuation that spool produces, can extend the working life of pressure-limit valve, avoid the generation of security incident.In addition, another object of the present utility model is for providing a kind of motor applying above-mentioned pressure-limit valve.
For solving the problems of the technologies described above, the utility model provides a kind of pressure-limit valve of motor, comprise valve body, be located at spool in described valve body and spring, described spool is coordinated with described valve body slides by described spring, the oil inlet hole that described valve body is provided with oil leak hole, is communicated with described motor main oil gallery, described oil inlet hole is communicated with described spring-compressed with described oil leak hole, disconnect with described recoil of spring; Described spring is variable rate spring, and the rigidity of described variable rate spring near described spool one end is less than the rigidity away from described spool one end.
Preferably, the rigidity of described variable rate spring becomes large along the one end near described spool gradually to the other end.
Preferably, described spring one end is sheathed on the inside of described spool, the other end is connected with described valve body one end away from described spool.
Preferably, the number of described oil leak hole is multiple, and the height of multiple described oil leak hole on valve body is entirely not identical.
Preferably, the number of described oil leak hole is four, and four described oil leak hole are distributed in the circumference of described valve body, and the height of two often relative described oil leak hole is identical, wherein oil leak hole described in a pair lower than another to described oil leak hole.
Preferably, the number of described oil leak hole is four, and four described oil leak hole are distributed in the circumference of described valve body, and the height of each described oil leak hole is different.
The utility model provides a kind of pressure-limit valve of motor, and its spring is variable rate spring, and the rigidity of described variable rate spring near described spool one end is less than the rigidity away from described spool one end.
Adopt this structure, engine oil pressure in the main oil gallery of motor exceedes the set pressure of pressure-limit valve, namely when the lubricating oil pressure pressure acted on spool is greater than the elastic force of spring, spool Compress Spring moves down, be communicated with oil leak hole to make the oil inlet hole of valve body, then unnecessary in main oil gallery lubricant oil releases through oil inlet hole, oil leak hole, reduces the engine oil pressure in main oil gallery.When the pressure that oil pressure acts on spool is less than spring force, spring resilience under himself elastic force effect, promote spool up, disconnect oil inlet hole and oil leak hole, thus keep the oil pressure in motor main oil gallery relatively stable.Because this spring adopts variable rate spring, and the rigidity of close spool side is less, therefore compared with prior art constant-rate spring, when there is fluctuation in main oil gallery pressure, the rebound velocity of spool slows down, the fluctuation caused because rigidity is large in the valve body that restrained effectively spool, avoids spring and motor self-vibration to produce resonating and causes the phenomenon of spring breakage, substantially prolongs the working life of spring, improve the functional reliability of pressure-limit valve.
The utility model also provides a kind of motor, has lubricating oil path, is provided with pressure-limit valve in described lubricating oil path; Described pressure-limit valve adopts the pressure-limit valve of motor as above.
Because above-mentioned pressure-limit valve has technique effect as above, therefore, the motor comprising this pressure-limit valve also should have identical technique effect, does not repeat them here.
Accompanying drawing explanation
Fig. 1 provides by the utility model the structural representation of a kind of embodiment of pressure-limit valve;
Fig. 2 is the explosive view along valve core axis in Fig. 1;
Fig. 3 is the structural representation of valve body in Fig. 1.
Wherein, the corresponding relation between the reference character of Fig. 1 to Fig. 3 and component names is:
Valve body 1; Spool 2; Spring 3; Valve seat 4;
Main oil gallery A; Oil inlet hole B; Oil leak hole C.
Embodiment
Core of the present utility model is for providing a kind of pressure-limit valve of motor, and the spring of this pressure-limit valve adopts variable rate spring, reduces the fluctuation that spool produces, can extend the working life of pressure-limit valve, avoid the generation of security incident.In addition, another core of the present utility model is for providing a kind of motor applying above-mentioned pressure-limit valve.
In order to make those skilled in the art understand the technical solution of the utility model better, below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Please refer to Fig. 1 and Fig. 2, Fig. 1 provides by the utility model the structural representation of a kind of embodiment of pressure-limit valve; Fig. 2 is the explosive view along spool 2 axis in Fig. 1.
In a kind of embodiment, as depicted in figs. 1 and 2, the utility model provides a kind of pressure-limit valve of motor, comprise valve body 1, be located at spool 2 in valve body 1 and spring 3, spool 2 is slidably matched by spring 3 and valve body 1, valve body 1 is provided with the oil inlet hole B that is communicated with motor main oil gallery A and the oil leak hole C for draining, and oil inlet hole B and oil leak hole C compress with spring 3 and be communicated with, disconnect with spring 3 resilience.Spring 3 is variable rate spring, and the rigidity of variable rate spring near spool 2 side is less than the rigidity away from spool 2 side.
Adopt this structure, as shown in Figure 1, engine oil pressure in the main oil gallery A of motor exceedes the set pressure of pressure-limit valve, namely when the lubricating oil pressure pressure acted on spool 2 is greater than the elastic force of spring 3, spool 2 Compress Spring 3 moves down, to make the oil inlet hole B of valve body 1 be communicated with oil leak hole C, then unnecessary in main oil gallery A lubricant oil releases through oil inlet hole B, oil leak hole C, reduces the engine oil pressure in main oil gallery A.When the oil pressure pressure acted on spool 2 is less than spring 3 elastic force, spring 3 resilience under himself elastic force effect, promote spool 2 up, disconnect oil inlet hole B and oil leak hole C, thus keep the oil pressure in motor main oil gallery A relatively stable.Because this spring 3 adopts variable rate spring, and the rigidity of close spool 2 side is less, therefore compared with prior art constant-rate spring, when there is fluctuation in main oil gallery A pressure, the rebound velocity of spool 2 slows down, and restrained effectively the fluctuation caused because rigidity is large in the valve body 1 of spool 2, avoids spring 3 and motor self-vibration to produce and resonates and cause the phenomenon that spring 3 ruptures, substantially prolongs the working life of spring 3, improve the functional reliability of pressure-limit valve.
In concrete scheme, the rigidity of above-mentioned variable rate spring becomes large along the one end near spool 2 gradually to the other end, and the rigidity of the spring 3 namely in Fig. 1 becomes large from top to bottom gradually.
Adopt this structure, make spring 3 gradually by compression and resilience process in, can avoid the elastic force of spring 3 produce stepped unexpected jump, therefore its generation fluctuation less, further suppress the fluctuation that spool 2 causes.
Can expect, the rigidity of above-mentioned spring 3 arranges and is not limited in this, spring 3 can also be divided into two sections, one section near spool 2 is called first paragraph, one section away from spool 2 is called second segment, first paragraph has the first rigidity, second segment has the second rigidity, and the integral rigidity of first paragraph is greater than the integral rigidity of second segment.Production, the process for making of this structure are simple, but its fluctuation produced is slightly larger than rigidity gradual change type variable rate spring.
The concrete setting position of above-mentioned spring 3 can also be specifically set.
In another kind of embodiment, as shown in Figure 1, above-mentioned spring 3 one end is sheathed on the inside of spool 2, the other end is connected with valve body 1 one end away from spool 2.
Adopt this structure, nested spool 2 is connected with spring 3 reliably, can stablize the transmission realizing power between spool 2 and spring 3, makes spool 2 can stably drive spring 3 to compress, and the resilience of spring 3 also can stablize that to promote spool 2 up.
Can expect, the top of above-mentioned spring 3 is not limited in above-mentioned sleeve structure, such as, the bottom of the top of spring 3 with spool 2 can also be connected, and like this, can realize spool 2 equally and promote the function that spring 3 compresses, spring 3 resilience promotion spool 2 is up.
In another kind of embodiment, as shown in Figure 3, Fig. 3 is the structural representation of valve body 1 in Fig. 1, and the number of the oil leak hole C of above-mentioned pressure-limit valve can be multiple, and the height of multiple oil leak hole C on valve body 1 is entirely not identical.
Adopt this structure, at the initial stage that pressure-limit valve is opened, the oil leak hole C that oil inlet hole B is first higher with position is communicated with, make the oil flow rate of leakage less, along with spool 2, to drive spring 3 to continue descending, the oil leak hole C that oil inlet hole B is lower with position successively is gradually communicated with, and the oil flow rate of leakage just increases gradually.Identical reason, in the process that this pressure-limit valve cuts out, also there is the process reduced gradually in the oil flow rate of leakage.
From above-mentioned working procedure, compared with the pressure-limit valve that the height of oil leak hole C all in prior art is consistent, this pressure-limit valve can make the incremental process of the oil level of leakage existence from less to more, from many to few, instead of stepped unexpected change, therefore, it is possible to effectively reduce the variance ratio of the dredge oil amount of machine oil, and then the pressure surge reduced in main oil gallery A, ensure the working stability of motor.
In concrete scheme, the number of above-mentioned oil leak hole C can be four, and four oil leak hole C are distributed in the circumference of valve body 1, and the height of two often relative oil leak hole C is identical, wherein a pair oil leak hole C lower than another to oil leak hole C.
Adopt this structure, the pressure surge in main oil gallery A can be reduced, make again the processing of valve body 1, manufacture process simply, conveniently, and control the processing cost of valve body 1.
Can expect, the arrangement of above-mentioned oil leak hole C is not limited in this structure, and such as, the height of above-mentioned four oil leak hole C is different, can circumferentially raise successively, raises successively clockwise or raises successively counterclockwise.
Adopt this structure, the speed that the dredge oil amount that further can slow down machine oil increases or reduces, also namely further reduce the pressure surge in main oil gallery A, ensure the working stability of motor.
In addition, the utility model also provides a kind of motor, has lubricating oil path, is provided with pressure-limit valve in lubricating oil path, and this pressure-limit valve adopts the pressure-limit valve of motor as above.
Because above-mentioned pressure-limit valve has technique effect as above, therefore, the motor applying this pressure-limit valve also should have identical technique effect, does not repeat them here.
Above a kind of motor provided by the utility model and pressure-limit valve thereof are described in detail.Apply specific case herein to set forth principle of the present utility model and mode of execution, the explanation of above embodiment just understands method of the present utility model and core concept thereof for helping.Should be understood that; for those skilled in the art; under the prerequisite not departing from the utility model principle, can also carry out some improvement and modification to the utility model, these improve and modify and also fall in the protection domain of the utility model claim.
Claims (7)
1. the pressure-limit valve of a motor, comprise valve body (1), be located at spool (2) in described valve body (1) and spring (3), described spool (2) is slidably matched by described spring (3) and described valve body (1), the oil inlet hole (B) that described valve body (1) is provided with oil leak hole (C), is communicated with described motor main oil gallery (A), described oil inlet hole (B) compresses with described spring (3) with described oil leak hole (C) and is communicated with, disconnects with (3) resilience of described spring; It is characterized in that, described spring (3) is variable rate spring, and the rigidity of described variable rate spring near described spool (2) side is less than the rigidity away from described spool (2) side.
2. the pressure-limit valve of motor according to claim 1, is characterized in that, the rigidity of described variable rate spring becomes large along the one end near described spool (2) gradually to the other end.
3. the pressure-limit valve of motor according to claim 2, it is characterized in that, described spring (3) one end is sheathed on the inside of described spool (2), the other end is connected with described valve body (1) one end away from described spool (2).
4. the pressure-limit valve of the motor according to any one of claim 1-3, is characterized in that, the number of described oil leak hole (C) is multiple, and the height of multiple described oil leak hole (C) on valve body (1) is entirely not identical.
5. the pressure-limit valve of motor according to claim 4, it is characterized in that, the number of described oil leak hole (C) is four, four described oil leak hole (C) are distributed in the circumference of described valve body (1), the height of two often relative described oil leak hole (C) is identical, wherein oil leak hole described in a pair (C) lower than another to described oil leak hole (C).
6. the pressure-limit valve of motor according to claim 4, it is characterized in that, the number of described oil leak hole (C) is four, four described oil leak hole (C) are distributed in the circumference of described valve body (1), and the height of each described oil leak hole (C) is different.
7. a motor, has lubricating oil path, is provided with pressure-limit valve in described lubricating oil path; It is characterized in that, described pressure-limit valve adopts the pressure-limit valve of the motor as described in claim 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420417617.9U CN204060841U (en) | 2014-07-25 | 2014-07-25 | A kind of motor and pressure-limit valve thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420417617.9U CN204060841U (en) | 2014-07-25 | 2014-07-25 | A kind of motor and pressure-limit valve thereof |
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| Publication Number | Publication Date |
|---|---|
| CN204060841U true CN204060841U (en) | 2014-12-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420417617.9U Active CN204060841U (en) | 2014-07-25 | 2014-07-25 | A kind of motor and pressure-limit valve thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104153841A (en) * | 2014-07-25 | 2014-11-19 | 潍柴动力扬州柴油机有限责任公司 | Engine and pressure limiting valve thereof |
| CN110486132A (en) * | 2017-08-29 | 2019-11-22 | 熵零技术逻辑工程院集团股份有限公司 | A kind of changeable phases pilot valve |
-
2014
- 2014-07-25 CN CN201420417617.9U patent/CN204060841U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104153841A (en) * | 2014-07-25 | 2014-11-19 | 潍柴动力扬州柴油机有限责任公司 | Engine and pressure limiting valve thereof |
| CN110486132A (en) * | 2017-08-29 | 2019-11-22 | 熵零技术逻辑工程院集团股份有限公司 | A kind of changeable phases pilot valve |
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| GR01 | Patent grant |