CN201787304U - Unloading valve of lubricating pump and lubrication system employing same - Google Patents
Unloading valve of lubricating pump and lubrication system employing same Download PDFInfo
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- CN201787304U CN201787304U CN2010202960366U CN201020296036U CN201787304U CN 201787304 U CN201787304 U CN 201787304U CN 2010202960366 U CN2010202960366 U CN 2010202960366U CN 201020296036 U CN201020296036 U CN 201020296036U CN 201787304 U CN201787304 U CN 201787304U
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- hole
- sliding spool
- valve
- piston structure
- unloading
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Abstract
The utility model relates to an unloading valve of a lubricating pump and a lubrication system employing the same. The unloading valve comprises a sliding valve body and a sliding valve core, wherein a stepped hole is formed on the sliding valve body in the axial direction of the sliding valve body; an unloading opening is formed at the large-diameter end of the stepped hole; the oil outlet of the stepped hole is connected with a valve seat; an axial blind hole is formed on the sliding valve core at the end near the valve seat; the other end of the sliding valve core adopts a piston structure; a radial through hole communicated with the axial blind hole is formed on the piston structure; the piston structure is in sliding fit with the small-diameter hole of the stepped hole; the sliding valve core is arranged at the downstream part of the piston structure and is in sliding and sealing fit with the large-diameter hole of the stepped hole; when the sliding valve core is in an initial position, the unloading opening and the oil outlet are communicated with each other; and an unloading spring is mounted between the sliding valve core and the valve seat in a propped manner. Instead of sealing the unloading opening and conducting an oil line synchronously in the traditional like unloading valves, the operations of sealing the unloading opening and conducting the oil line are conducted step by step, so that the utility model solves the problem of oil leakage at the unloading opening of the pressure relief valve of the lubricating pump during the oil pumping process of the lubricating pump.
Description
Technical field
The utility model relates to lubrication technical field, especially a kind of lubricant pump unloading valve and use the lubrication system of this lubricant pump unloading valve.
Background technique
In the centralized lubrication technology, for guaranteeing the distributor proper functioning, the lubricant pump oil outlet is set up in the fuel tank the unloading valve structure.After this structural requirement lubricant pump running finishes, the necessary release of working connection, the oil separator of working connection end could be to each lubricating point fuel feeding.Therefore, in this structure, need in fuel tank, pump oil port a unloading valve is set, common unloading valve sees German VOGEL KFU2-40 type commerial vehicle one-shot chassis lubrication system and the patent No. is the utility model patent " the automatic control balanced relief valve of lubrication system " of ZL00247891.9 on the market, mainly is made up of slide valve, two-position three way sliding spool, dual spring cone valve and conical valve base etc.The unloading valve of this structural type has solved a working connection release difficult problem, but its spring supporting structure makes cone valve to-and-fro motion precision relatively poor, usually with conical valve base on unloading hole poorly sealed, cause that fluid seriously leaks in the lubricant pump running, cause the lubricant pump can't be to the main oil gallery delivering oil.The utility model patent that the then disclosed patent No. is ZL00248280.0 " a kind of automatic control balanced relief valve " has been simplified to the umbrella shape elastic packing bowl formula structure that spring support moves back and forth down to two-position three way guiding valve and dual spring cone valve, though this structure is simple, but its spring supporting structure makes umbrella shape bowl to-and-fro motion precision still relatively poor, still can't guarantee the reliably working of lubrication system.
The patent No. is that 200720089156.7 Chinese patent discloses a kind of unloading type lubricant pump unloading valve; mainly contain slide valve; sliding spool; unloading spring and valve seat are formed; sliding spool lower end blind hole mouth is welded with a filter screen; sliding spool between centers bottom radially be provided with communicate with described blind hole to wearing throttle orifice; described between centers is arranged with damping washer; in the corresponding slide valve of packing into of described between centers with oil outlet; described sliding spool upper end blind hole internal fixation is provided with an axial elasticity sealing block; be provided with unloading spring between sliding spool and the valve seat; described valve seat is provided with an off-load mouth; lubricant pump is under outage state; described elastic packing piece and sliding spool are fixed together; thereby guaranteed accuracy of alignment between described elastic packing piece and the valve seat off-load mouth, thereby guarantee unloading valve reliable sealing when lubricant pump turns round.
Above-mentioned unloading type lubricant pump unloading valve has solved the problem that fluid leaks from the off-load mouth in the lubricant pump running to a certain extent, but, because it seals described off-load mouth to wearing throttle orifice described elastic packing piece when opening, describedly carry out simultaneously wearing opening of throttle orifice with the sealing of described off-load mouth, described off-load mouth and describedly connect for some time to wearing throttle orifice, in this each time period, fluid may spill from described off-load mouth under the effect of lubricant pump, and therefore above-mentioned unloading type lubricant pump unloading valve does not still have thoroughly to solve the problem that fluid leaks from the off-load mouth in the lubricant pump running.
The model utility content
The purpose of this utility model is to provide a kind of lubricant pump unloading valve, the problem of leaking from the off-load mouth with fluid in the running of thorough solution lubricant pump; Simultaneously, the purpose of this utility model also is to provide a kind of lubrication system of using above-mentioned lubricant pump unloading valve.
To achieve these goals, lubricant pump unloading valve of the present utility model adopts following technological scheme: the lubricant pump unloading valve, comprise slide valve, valve seat, sliding spool and unloading spring, described slide valve has a step hole along its axial direction, the miner diameter end of described step hole has filler opening, bigger diameter end has oil outlet, the side face of the bigger diameter end of described step hole is provided with the off-load mouth that connects the internal and external walls face, described valve seat is arranged on the oil outlet of described slide valve, described sliding spool is provided with axial blind hole near an end of described valve seat, the other end is set to piston structure, has the radial direction through hole that communicates with described axial blind hole on the described piston structure, the internal face in the path hole of the outer circumferential face of described piston structure and described step hole is slidingly matched, the outer wall that described sliding spool is positioned at the part in its piston structure downstream cooperates with the internal face slipper seal in the hole, big footpath of described step hole, the step surface of described step hole limits the initial position of described sliding spool, when described sliding spool is positioned at initial position, described off-load mouth and described oil outlet connect mutually, and described unloading spring is mounted between sliding spool and the valve seat.
Has the damping gap between the inwall in the path hole of the outer circumferential face of described piston structure and described step hole.
Described piston structure has the damping hole that connects its both sides, front and back.
Described sliding spool near on the end face of an end of valve seat and/or described valve seat be provided with the guide sleeve that is used to prevent described unloading spring generation radial displacement near the end face of an end of sliding spool.
Lubrication system of the present utility model adopts following technological scheme: a kind of lubrication system, comprise lubricant pump, oil line pipe, the lubricant pump unloading valve and the oil separator that are connected in series with described lubricant pump, described lubricant pump unloading valve comprises described slide valve, valve seat, sliding spool and unloading spring, described slide valve has a step hole along its axial direction, the miner diameter end of described step hole has filler opening, bigger diameter end has oil outlet, the side face of the bigger diameter end of described step hole is provided with the off-load mouth that connects the internal and external walls face, described valve seat is arranged on the oil outlet of described slide valve, described sliding spool is provided with axial blind hole near an end of described valve seat, the other end is set to piston structure, has the radial direction through hole that communicates with described axial blind hole on the described piston structure, the internal face in the path hole of the outer circumferential face of described piston structure and described step hole is slidingly matched, the outer wall that described sliding spool is positioned at the part in its piston structure downstream cooperates with the internal face slipper seal in the hole, big footpath of described step hole, the step surface of described step hole limits the initial position of described sliding spool, when described sliding spool is positioned at initial position, described off-load mouth and described oil outlet connect mutually, and described unloading spring is mounted between sliding spool and the valve seat.
Has the damping gap between the inwall in the path hole of the outer circumferential face of described piston structure and described step hole.
Described piston structure has the damping hole that connects its both sides, front and back.
Described sliding spool near on the end face of an end of valve seat and/or described valve seat be provided with the guide sleeve that is used to prevent described unloading spring generation radial displacement near the end face of an end of sliding spool.
Because promoting sliding spool by piston structure when lubricant pump pump oil, moves by lubricant pump unloading valve of the present utility model, the form that adopts all face seals earlier is by sliding spool sealing off-load mouth, and then conducting oil circuit, the sealing of the off-load mouth that traditional similar unloading valve is carried out synchronously and the conducting of oil circuit change into progressively carries out (mouth of sealing off-load earlier is the conducting oil circuit again), thereby has thoroughly solved the problem of off-load mouth leakage of oil in the pump oil process of lubricant pump of lubricant pump unloading valve.
Further, between described piston structure and described slide valve, the damping gap is set, like this can be when described sliding spool return, the parts of lubricating oil at filler opening place is extruded from the off-load mouth by the damping gap, thereby reduce the pressure of described sliding spool upstream, avoid described sliding spool return not thorough; Certainly, can also on described piston structure, offer the thorough return that damping hole is realized sliding spool, when described lubricant pump unloading valve connects Oil Guide, lubricant oil entered described sliding spool and leaks from described off-load mouth before the complete closure of described off-load mouth, can be suitable reduce described damping hole or damping gap, the elasticity pretightening force by default unloading spring is implemented in lubricant oil and arrives before the described off-load mouth described off-load mouth sealing simultaneously; Described sliding spool near the end face of an end of valve seat on or on the end face of described valve seat near an end of sliding spool guide sleeve is set, can prevent described unloading spring generation radial displacement like this, prevent the off-load failure, can also on the described sliding spool and on the valve seat guide sleeve be set simultaneously certainly.
Because promoting sliding spool by piston structure when lubricant pump pump oil, moves by the lubricant pump unloading valve of lubrication system of the present utility model, the form that adopts all face seals earlier is by sliding spool sealing off-load mouth, and then conducting oil circuit, the sealing of the off-load mouth that traditional similar unloading valve is carried out synchronously and the conducting of oil circuit change into progressively carries out (mouth of sealing off-load earlier is the conducting oil circuit again), thereby has thoroughly solved the problem of off-load mouth leakage of oil in the pump oil process of lubricant pump of lubricant pump unloading valve.
Further, between described piston structure and described slide valve, the damping gap is set, like this can be when described sliding spool return, the parts of lubricating oil at filler opening place is extruded from the off-load mouth by the damping gap, thereby reduce the pressure of described sliding spool upstream, avoid described sliding spool return not thorough; Certainly, can also on described piston structure, offer the thorough return that damping hole is realized sliding spool, when described lubricant pump unloading valve connects Oil Guide, lubricant oil entered described sliding spool and leaks from described off-load mouth before the complete closure of described off-load mouth, can be suitable reduce described damping hole or damping gap, the elasticity pretightening force by default unloading spring is implemented in lubricant oil and arrives before the described off-load mouth described off-load mouth sealing simultaneously; Described sliding spool near the end face of an end of valve seat on or on the end face of described valve seat near an end of sliding spool guide sleeve is set, can prevent described unloading spring generation radial displacement like this, prevent the off-load failure, can also on the described sliding spool and on the valve seat guide sleeve be set simultaneously certainly.
Description of drawings
Fig. 1 is the embodiment's 1 of a lubricant pump unloading valve of the present utility model structural representation;
Fig. 2 is the embodiment's 2 of a lubricant pump unloading valve of the present utility model structural representation;
Fig. 3 is the embodiment's 3 of a lubricant pump unloading valve of the present utility model structural representation;
Fig. 4 is the embodiment's 4 of a lubricant pump unloading valve of the present utility model structural representation;
Fig. 5 is the embodiment's 5 of a lubricant pump unloading valve of the present utility model structural representation;
Fig. 6 is the embodiment's 6 of a lubricant pump unloading valve of the present utility model structural representation;
Fig. 7 is the embodiment's 1 of a lubrication system of the present utility model structural representation;
Fig. 8 is the embodiment's 2 of a lubrication system of the present utility model structural representation.
Embodiment
The embodiment 1 of lubricant pump unloading valve of the present utility model
As shown in Figure 1, the endoporus of slide valve 1 is a step hole, the bigger diameter end of slide valve 1 has oil outlet, miner diameter end has filler opening, it is certain that the oil outlet place is bolted with valve seat 2(, in other embodiments, the form that slide valve 1 and valve seat 2 can also adopt flange to be connected), add seal ring between valve seat 2 and the slide valve 1, valve seat 2 is provided with along the oil outlet 3 of slide valve 1 axial direction, slidable fit has sliding spool 4 in the slide valve 1, has axial blind hole on the end face of sliding spool 4 near an end of valve seat 2, the other end forms piston structure 7, has the radial direction through hole 8 that communicates with axial blind hole on the piston structure 7, piston structure 7 is slidingly matched with the path hole of slide valve 1, has damping gap 9 between the internal face in the path hole of the outer circumferential face of piston structure 7 and slide valve 1 simultaneously, the outer wall that slide valve 1 is positioned at the part in its piston structure downstream cooperates and cooperates and limit with the step surface block of the step hole of slide valve 1 simultaneously the initial position of sliding spool 4 with the internal face slipper seal in the hole, big footpath of slide valve 1, be top-loaded with unloading spring 5 between sliding spool 4 and the valve seat 2, the bigger diameter end of slide valve 1 circumferentially be provided with off-load mouth 10, when sliding spool position 4 during in initial position (when the step surface of slide valve 1 contacts with sliding spool 4), off-load mouth 10 is positioned at the downstream of sliding spool 4 away from the end face of an end of its piston structure 7, simultaneously, off-load mouth 10 away from a side of sliding spool 4 to sliding spool 4 away from the distance of the end face of an end of its piston structure 7 less than (certainly, also can be to equal in other embodiments) axial length of piston structure 7, be in order to be subjected to the upstream pump oil pressure at sliding spool 4 and when mobile like this, the mouth of sealing off-load earlier 10 is the filler opening and the oil outlet of conducting slide valve 1 again, sliding spool 4 and valve seat 2 the two opposite end respectively are in separately end face and are provided with that to be used to prevent that unloading spring 5 from the guide sleeve 6(of radial displacements taking place certain, in other embodiments, can also only in sliding spool 4 or valve seat 2 guide sleeve 6 be set, perhaps omit guide sleeve 6).
The embodiment 2 of lubricant pump unloading valve of the present utility model
As shown in Figure 2, present embodiment and embodiment's 1 difference is, on the baffle plate 20 of piston structure 7 axial damping hole 11 is set, and can omit the damping gap 9 between piston structure 7 peripheral outer wall and slide valve 1 internal face in this case.
The embodiment 3 of lubricant pump unloading valve of the present utility model
As shown in Figure 3, present embodiment and embodiment's 1 difference is, has a boss 12 on the front-end face of piston structure 7, in this case, when sliding spool is positioned at initial position, off-load mouth 10 the side in downstream to sliding spool 4 away from the distance between the end face of an end of its piston structure 7 should be less than or equal to piston structure 7 from end face thereafter to the distance the front-end face of its baffle plate 20.
The embodiment 4 of lubricant pump unloading valve of the present utility model
As shown in Figure 4, present embodiment and embodiment's 3 difference is, axial damping hole 11 is set on the piston structure 7, can omit the outer circumferential face of piston structure 7 and the damping gap 9 between slide valve 1 inwall in this case.
The embodiment 5 of lubricant pump unloading valve of the present utility model
As shown in Figure 5, present embodiment and embodiment's 1 difference is, the front-end face of piston structure 7 is provided with axial blind hole 13, its outer circumferential face is provided with the through hole 14 that communicates with blind hole 13, in this case, when sliding spool 4 is positioned at initial position, off-load mouth 10 the side in downstream to sliding spool 4 should be less than or equal to away from the distance between the end face of an end of its piston structure 7 piston structure 7 from end face thereafter to the distance its baffle plate 20 front-end faces; When the lubricant pump unloading valve conducting of present embodiment, lubricant oil is earlier by blind hole 13 oil-feeds, and then crosses through hole 14 and enter in the axial blind hole of sliding spool 4 at the place, hole, big footpath of slide valve 1, and finally the oil outlet 3 from valve seat 2 flows out.
The embodiment 6 of lubricant pump unloading valve of the present utility model
As shown in Figure 6, present embodiment and embodiment's 5 difference is, axial damping hole 11 is set on the piston structure 7, can omit the outer circumferential face of piston structure 7 and the damping gap 9 between slide valve 1 inwall in this case.
In the various embodiments described above, damping gap 9 and damping hole 11 can omit simultaneously, increase the pretightening force of unloading spring 5 or in use then accordingly, abdicate space in the upstream line of the present utility model by the modes such as counter-rotating of upstream lubricant pump; Slide valve 1 can also adopt split-type structural, form the step hole of its endoporus respectively by two different segment pipes of the internal diameter that is tightly connected, in this case, the sliding spool 4 of can packing into from the joint of described two segment pipes, the bigger diameter end with valve seat 2 and slide valve 1 is made as one simultaneously.
The embodiment 1 of lubrication system of the present utility model
As shown in Figure 7, the embodiment 1 of lubrication system of the present utility model, be serially connected with lubricant pump unloading valve 22 on the lubricant pump 21, unloading valve 22 is connected with oil separator 24 by working connection pipeline 23, and the structure of the lubricant pump unloading valve in lubricant pump unloading valve 22 and the utility model is identical.
The embodiment 2 of lubrication system of the present utility model
As shown in Figure 8, the embodiment's 1 of present embodiment and lubrication system of the present utility model difference is, two branch roads after lubricant pump unloading valve 22, have been arranged in parallel on the working connection pipeline (certainly, in other embodiments, can also be two above branch roads), article two, respectively be serially connected with a component oil device 24 on the branch road, each component oil device is respectively applied for different lubricating points is lubricated.
Claims (8)
1. lubricant pump unloading valve, comprise slide valve, valve seat, sliding spool and unloading spring, it is characterized in that: described slide valve has a step hole along its axial direction, the miner diameter end of described step hole has filler opening, bigger diameter end has oil outlet, the side face of the bigger diameter end of described step hole is provided with the off-load mouth that connects the internal and external walls face, described valve seat is arranged on the oil outlet of described slide valve, described sliding spool is provided with axial blind hole near an end of described valve seat, the other end is set to piston structure, has the radial direction through hole that communicates with described axial blind hole on the described piston structure, the internal face in the path hole of the outer circumferential face of described piston structure and described step hole is slidingly matched, the outer wall that described sliding spool is positioned at the part in its piston structure downstream cooperates with the internal face slipper seal in the hole, big footpath of described step hole, the step surface of described step hole limits the initial position of described sliding spool, when described sliding spool is positioned at initial position, described off-load mouth and described oil outlet connect mutually, and described unloading spring is mounted between sliding spool and the valve seat.
2. lubricant pump unloading valve according to claim 1 is characterized in that: have the damping gap between the inwall in the path hole of the outer circumferential face of described piston structure and described step hole.
3. lubricant pump unloading valve according to claim 1 is characterized in that: described piston structure has the damping hole that connects its both sides, front and back.
4. lubricant pump unloading valve according to claim 1 is characterized in that: described sliding spool near on the end face of an end of valve seat and/or described valve seat be provided with the guide sleeve that is used to prevent described unloading spring generation radial displacement near the end face of an end of sliding spool.
5. lubrication system, comprise lubricant pump, oil line pipe, the lubricant pump unloading valve and the oil separator that are connected in series with described lubricant pump, described lubricant pump unloading valve comprises slide valve, valve seat, sliding spool and unloading spring, it is characterized in that: described slide valve has a step hole along its axial direction, the miner diameter end of described step hole has filler opening, bigger diameter end has oil outlet, the side face of the bigger diameter end of described step hole is provided with the off-load mouth that connects the internal and external walls face, described valve seat is arranged on the oil outlet of described slide valve, described sliding spool is provided with axial blind hole near an end of described valve seat, the other end is set to piston structure, has the radial direction through hole that communicates with described axial blind hole on the described piston structure, the internal face in the path hole of the outer circumferential face of described piston structure and described step hole is slidingly matched, the outer wall that described sliding spool is positioned at the part in its piston structure downstream cooperates with the internal face slipper seal in the hole, big footpath of described step hole, the step surface of described step hole limits the initial position of described sliding spool, when described sliding spool is positioned at initial position, described off-load mouth and described oil outlet connect mutually, and described unloading spring is mounted between sliding spool and the valve seat.
6. lubrication system according to claim 5 is characterized in that: have the damping gap between the inwall in the path hole of the outer circumferential face of described piston structure and described step hole.
7. lubrication system according to claim 5 is characterized in that: described piston structure has the damping hole that connects its both sides, front and back.
8. lubrication system according to claim 5 is characterized in that: described sliding spool near on the end face of an end of valve seat and/or described valve seat be provided with the guide sleeve that is used to prevent described unloading spring generation radial displacement near the end face of an end of sliding spool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202960366U CN201787304U (en) | 2010-08-18 | 2010-08-18 | Unloading valve of lubricating pump and lubrication system employing same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202960366U CN201787304U (en) | 2010-08-18 | 2010-08-18 | Unloading valve of lubricating pump and lubrication system employing same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201787304U true CN201787304U (en) | 2011-04-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202960366U Expired - Lifetime CN201787304U (en) | 2010-08-18 | 2010-08-18 | Unloading valve of lubricating pump and lubrication system employing same |
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| Country | Link |
|---|---|
| CN (1) | CN201787304U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103759123A (en) * | 2014-01-20 | 2014-04-30 | 郑州奥特科技有限公司 | Auxiliary oil draining valve and centralized lubricating device |
-
2010
- 2010-08-18 CN CN2010202960366U patent/CN201787304U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103759123A (en) * | 2014-01-20 | 2014-04-30 | 郑州奥特科技有限公司 | Auxiliary oil draining valve and centralized lubricating device |
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| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110406 |