CN201083315Y - Current-limiting valve - Google Patents
Current-limiting valve Download PDFInfo
- Publication number
- CN201083315Y CN201083315Y CNU2007201150730U CN200720115073U CN201083315Y CN 201083315 Y CN201083315 Y CN 201083315Y CN U2007201150730 U CNU2007201150730 U CN U2007201150730U CN 200720115073 U CN200720115073 U CN 200720115073U CN 201083315 Y CN201083315 Y CN 201083315Y
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- CN
- China
- Prior art keywords
- valve
- hole
- flow
- valve rod
- limiting valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Lift Valve (AREA)
Abstract
The utility model discloses a flow-limiting valve comprising a valve body (1) provided with an inlet (11) and an outlet (12), a through hole (13) positioned on the valve body (1) and communicated with the inlet (11) and the outlet (12), a valve rod (2) and a spring (3) allowing the valve rod (2) to always be intended to close the through hole (13), wherein, the through hole (13) is of a straight cylinder, one end of the valve rod (2) is a plane (22) the outer diameter of which is greater than the inner diameter of the through hole (13), the plane (22) extends out a needle bar (21) which axially passes through the through hole (13), the diameter of the needle bar (21) is smaller than the inner diameter of the through hole (13). Compared with the prior art, the flow rate of the flow-limiting valve of the utility model is determined by the distance between the vertical part of the valve rod and the cylindrical through hole (namely the flow rate is increased with the increase of the distance between the two, the flow rate is reduced with the reduction of the distance), the linear adjustment is realized to assure the accurate adjustment to the flow rate; under certain oil supply pressure of the oil pump, the flow rate is constant for one exclusive flow-limiting valve, the valve rod has slight abrasion, the flow rate of the flow-limiting valve is steadier.
Description
Technical field
The utility model relates to the technical field of flow-limiting valve, especially refers to a kind of flow-limiting valve that can accurately adjust flow.
Background technique
In lubrication system, because each fuel feeding point has nothing in common with each other with the distance of oil pump, and on the way pipeline also has various elbows between oil pump and the fuel feeding point, like this, resistance from oil pump to each fuel feeding point is just not quite identical, and oil pump is unified fuel feeding, and the actual oil mass that obtains of each fuel feeding point is just not quite identical like this, for guaranteeing that each fuel feeding puts the size that resulting actual oil mass can both reach in advance design, just need before each fuel feeding point, flow-limiting valve be set.This flow-limiting valve is equivalent to an one-way valve, generally comprises the valve body that has import and outlet, is located in valve rod in the valve body, is against the spring between valve rod afterbody and the valve body inboard.At present, put the less lubrication system of required flow for fuel feeding, the flow-limiting valve of more employing taper valve rod, also be, the valve rod head is tapered, and the sidewall that is positioned at its inlet in the valve body also has the taper that is complementary, when the sidewall of valve rod head and valve body inlet does not have the gap, then this flow-limiting valve is closed, and the sidewall of working as valve rod head and valve body inlet keeps a determining deviation, then flow-limiting valve conducting, this flow-limiting valve are the current limliting amounts of regulating flow-limiting valve by the gap between the sidewall of the conical nose of regulating valve stem and valve body inlet.But by regulating the mode that the taper gap length is regulated flow, the flow rate conversion of tapered gaps and flow-limiting valve is cumbersome, its Flow-rate adjustment linear relatively poor, and after long-term the use, because a variety of causes such as valve rod head and valve inner wearing and tearing, the actual flow of flow-limiting valve can exist than mistake, the flow value that actual flow may the substantial deviation expection.For remedying this defective, present processing method is to strengthen the fuel delivery of oil pump, and is not direct improvement flow-limiting valve, so not only can cause the waste of the energy, and after the fuel feeding point is injected into too much oil mass, when mechanical part operates, can cause oily temperature rise, oil degenerates.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of flow to adjust the flow-limiting valve accurate, that discharge value has good stability at above-mentioned prior art present situation.
The utility model solves the problems of the technologies described above the technological scheme that is adopted: this flow-limiting valve, comprise and bring into mouthful and the valve body of outlet, be positioned at and be communicated with through hole, the valve rod of import and outlet on the valve body and make valve rod have the spring of the trend of closing described through hole all the time, it is characterized in that: described through hole is straight tubular, described valve rod end is the plane of external diameter greater than described through hole internal diameter, on this plane, then extend the shank that axially is located in the described through hole, and the diameter of this shank is less than the internal diameter of described through hole.
For the less flow-limiting valve of discharge value, it is less that gap between the straight tubular through hole madial wall of shank and valve body need be designed, for avoiding the impurity obstruction gap between the two in the transferring oil, influence the normal circulation of flow-limiting valve, can be provided with filter screen in the import of described valve body, in order to the impurity in the filter oil.
For ease of the setting of valve body inner valve stem and spring, described valve body close-fitting in outlet has a valve plug that has a central penetration hole, and described spring one end is against on the valve rod, and the other end and described valve plug offset; As further improvement, described valve plug one side is provided with the step for described spring the other end location, and what make that the spring the other end can be firm is against the valve body inboard.
Compared with prior art, the valve of flow-limiting valve is served as in the end of valve rod in the utility model, and being a cross section, the slit between the straight tubular through hole of shank and valve body is annular space, the object of being carried just flows through in the slit between the two, like this, the flow of flow-limiting valve just can be decided by the spacing size between the straight tubular through hole of vertical part of valve rod and valve body, promptly spacing increases then flow increase between the two, spacing is dwindled then, and flow reduces, realize linearly adjust, it is accurate that flow is adjusted; And the cooperating of the straight tubular through hole by shank and valve body, under the certain condition of oil pump feed pressure, for unique its constant flow of flow-limiting valve, valve rod has wearing and tearing slightly, and the discharge value of flow-limiting valve is also more stable; In addition, the setting up of filter screen effectively avoided the impurity in the transferring oil to stop up gap between shank and the valve body, guarantees the normal circulation of flow-limiting valve; The utility model is simple in structure, is suitable for practical application, uses fuel feeding stable for a long time, can select lower-powered oil pump for use, and energy consumption is low, and reduces the lubricant oil intensification, improves lubricating quality.
Description of drawings
Fig. 1 is the utility model embodiment's a structural representation;
The schematic representation that Fig. 2 uses in actual lubrication system for the utility model embodiment.
Embodiment
Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.
As depicted in figs. 1 and 2, this flow-limiting valve comprises and brings mouthfuls 11 and the valve body 1 of outlet 12, be positioned at and be communicated with import 11 on the valve body 1 and export 12 be straight-cylindrical through hole 13, valve rod 2 and make valve rod 2 have the spring 3 of the trend of closing described through hole 13 all the time into;
Wherein, described valve rod 2 ends are the plane 22 of external diameter greater than described through hole internal diameter, then extend the shank 21 that axially is located in the described through hole 13 on this plane 22, and the diameter of this shank 21 are less than the internal diameter of described through hole 13;
Be provided with filter screen 4 in the import 11 of described valve body 1;
Described valve body 1 close-fitting in outlet 12 has a valve plug 5 that has a central penetration hole 51, and spring 3 one ends are against on the valve rod 2, and the other end and valve plug 5 offset, and valve plug 5 one sides are provided with the step 52 that ammunition feed spring 3 the other ends are located.
During real work, oil pump 6 has certain charge oil pressure, make spring 3 compressions in the valve body 1, the plane 22 of valve rod 2 ends breaks away from valve body 1 inboard, and making the flow-limiting valve conducting, this moment, transferring oil entered from the import 11 of valve body 1, by the gap between the straight tubular through hole 13 of shank 21 and valve body 1, then flow out from the outlet 12 of valve body 1, direction shown in the arrow is the transferring oil flow direction among Fig. 1.
Figure 2 shows that the application of flow-limiting valve in actual lubrication system, wherein, oil pump 6 is the adjustable variable capacity oil pump of oil pressure, and top flow-limiting valve (expression has 3 among the figure) is to supply with each sliding bearing, and bottom flow-limiting valve (expression has 4 among the figure) is the equipment that supply gear, cam etc. need oil dripping.
Claims (4)
1. flow-limiting valve, comprise the valve body (1) of bringing mouthful (11) and outlet (12) into, be positioned at valve body (1) and go up the through hole (13) that is communicated with import (11) and outlet (12), valve rod (2) and make valve rod (2) have the spring (3) of the trend of closing described through hole (13) all the time, it is characterized in that: described through hole (13) is straight tubular, described valve rod (2) end is the plane (22) of external diameter greater than described through hole (13) internal diameter, on this plane (22), then extend the shank (21) that axially is located in the described through hole (13), and the diameter of this shank (21) is less than the internal diameter of described through hole (13).
2. flow-limiting valve according to claim 1 is characterized in that: be provided with filter screen (4) in the import (11) of described valve body (1).
3. flow-limiting valve according to claim 1 and 2, it is characterized in that: described valve body (1) close-fitting in outlet (12) has a valve plug (5) that has central penetration hole (51), described spring (3) one ends are against on the valve rod (2), and the other end and described valve plug (5) offset.
4. flow-limiting valve according to claim 3 is characterized in that: described valve plug (5) one sides are provided with the step (52) for described spring (3) the other end location.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201150730U CN201083315Y (en) | 2007-09-25 | 2007-09-25 | Current-limiting valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201150730U CN201083315Y (en) | 2007-09-25 | 2007-09-25 | Current-limiting valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201083315Y true CN201083315Y (en) | 2008-07-09 |
Family
ID=39625782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201150730U Expired - Fee Related CN201083315Y (en) | 2007-09-25 | 2007-09-25 | Current-limiting valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201083315Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107883026A (en) * | 2018-01-06 | 2018-04-06 | 微山县日泰地暖工程有限公司 | Two-way water leakage preventing valve |
-
2007
- 2007-09-25 CN CNU2007201150730U patent/CN201083315Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107883026A (en) * | 2018-01-06 | 2018-04-06 | 微山县日泰地暖工程有限公司 | Two-way water leakage preventing valve |
| CN107883026B (en) * | 2018-01-06 | 2023-09-29 | 微山县日泰地暖工程有限公司 | Two-way leak-proof water valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: NINGBO BEILUN XINGGANG METALLURGICAL MACHINERY CO. Free format text: FORMER NAME OR ADDRESS: XINGANG PLASTIC MACHINERY CO., LTD., BEICANG, NINGBO CITY |
|
| CP01 | Change in the name or title of a patent holder |
Address after: Beilun Xiaogang Pu Shan, Zhejiang province Ningbo City zip code: 315803 Patentee after: Ningbo Beilun Xingang Metallurgy Machinery Co., Ltd. Address before: Beilun Xiaogang Pu Shan, Zhejiang province Ningbo City zip code: 315803 Patentee before: Ningbo Beilun Xingang Plastic Machinery Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080709 Termination date: 20110925 |