CN105835858A - Split sealing structure for piston core of loader booster pump - Google Patents
Split sealing structure for piston core of loader booster pump Download PDFInfo
- Publication number
- CN105835858A CN105835858A CN201610264311.8A CN201610264311A CN105835858A CN 105835858 A CN105835858 A CN 105835858A CN 201610264311 A CN201610264311 A CN 201610264311A CN 105835858 A CN105835858 A CN 105835858A
- Authority
- CN
- China
- Prior art keywords
- seal
- piston core
- booster pump
- sealing
- piston
- 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.)
- Pending
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T11/00—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant
- B60T11/10—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic
- B60T11/16—Master control, e.g. master cylinders
Abstract
The invention discloses a split sealing structure for a piston core of a loader booster pump and belongs to the field of engineering machinery. The split sealing structure comprises the piston core, a sealing part and a piston, wherein a sealing groove matched with the sealing part is formed in the piston core; the piston core and the sealing part adopt a split sealed structure, the sealing groove and the sealing part are in interference fit, and the sectional area of the sealing groove is larger than that of the sealing part, so that the reasonable filling rate and compression rate of the sealing part are guaranteed.. The split sealing structure is used for sealing between the piston and the piston core of the loader booster pump, solves the problem that the sealing part of the piston core of the booster pump is easy to damage due to extrusion and reduces the fabrication cost and the maintenance cost of the piston core and the sealing part of the piston core.
Description
Technical field
The invention belongs to the sealing structure of a kind of booster pump, specifically, particularly relate to a kind of loading machine booster pump piston core split and seal structure.
Background technology
Reduction of speed or parking operating mode when the brakes of loading machine is used for travelling, to meet the needs of overall operation or transition.The operating mode very severe of loading machine, advances frequently in operation process, retreats and be required for braking and coordinate and realize, and therefore the sealing property of brakes is directly connected to the property of normal work production efficiency especially complete machine and the life security of driver of complete machine.It is even more important so the unfailing performance of braking seems.
At present, domestic loading machine commonly used pincers dish dry type braking pincers are as the executing agency of brakes, and as a example by 5T loading machine, the operating pressure of its brakes is about 14MPa.The brakes cost comprehensive due to solution-air is relatively low, and the most domestic loading machine 2T-6T complete machine 95% uses this kind of brakes.This kind of brakes principle: the compressed air in air accumulator arrives booster pump air chamber end through brake valve when complete machine is braked；Owing to booster pump gas piston area and oil piston area ratio are for 1:18, loading machine nominal operation air pressure is 0.78MPa, and therefore booster pump oil cylinder end forms 14MPa brake pressure and acts on caliper, thus realizes complete machine braking function.Booster pump is as the core parts of such brakes, and it is changed as the reinforcement and power braking media implementation brakes with compressed air and brake fluid.But the higher difficult problem always perplexing each engineering machinery producer of booster pump fault rate；The damage of piston core heart portion seal accounts for more than the 50% of the fault rate of booster pump.Looking into its reason and being primarily due to current domestic booster pump producer is mostly to use seal monoblock type together with piston core casting in piston core heart portion to inlay sealing structure.Although this structure solves piston core holds caducous phenomenon with booster pump push rod when moving reciprocatingly, but run counter to rubber seal and need the principle of certain pack completeness when sealing, simply say to be exactly that rubber parts is when compression seal, the extruded rubber of unnecessary space is not had to thus result in the fatigue damage of seal, causing brake pressure not enough, causing brake force to reduce until losing braking.
Summary of the invention
It is an object of the present invention to provide a kind of loading machine booster pump piston core split and seal structure, with the easy fatigue damage of seal overcome in prior art in loading machine booster pump piston core, causing brake pressure not enough, causing brake force to reduce until losing the defect of braking.
The present invention realizes by the following technical solutions: a kind of loading machine booster pump piston core split seals structure, including piston core, seal and piston, described piston core is provided with the seal groove coordinated with seal, described piston core uses split type sealing structure with seal, it is interference fit between described seal groove and seal, and more than the sectional area of seal, the sectional area of seal groove ensures that seal has rational filling rate and compression ratio.
Described seal is O shape or D-shaped or rectangle.
Compared with prior art, the invention has the beneficial effects as follows:
1) solve booster pump piston core seal and easily squeeze bad problem.Former integral seal mechanism is 200,000 braking cycles in the booster pump life-span, and the present invention split type booster pump life-span is higher than 800,000 braking cycles, improves braking reliability, and seal life improves more than 2.5 times.
2) piston core and the manufacturing cost of piston core seal are reduced.The monolithic construction in the past used needs on castable rubber to the piston core processed, and processing technology complexity is relatively costly；The split-type structural that the present invention provides can improve efficiency with simplified processing process, reduces cost.
3) maintenance cost is reduced.Monolithic construction once seal was damaged and needs to change seal and piston core together in the past, and present configuration can solve this problem in the way of simple replacing seal, substantially increases maintenance efficiency and reduces service parts cost.
Accompanying drawing explanation
Fig. 1 is the structural representation that the present invention brakes front state；
Fig. 2 is the structural representation of present invention operated condition；
Fig. 3 is the structural representation of the piston core of the present invention；
Fig. 4 is the structural representation of the D-shaped seal of the present invention；
Fig. 5 is present invention structural representation in booster pump.
In figure: 1, piston core；2, seal；3, piston；4, oil cylinder；5, push rod；6, gas piston；7, seal groove.
Detailed description of the invention
The invention will be further described below in conjunction with the accompanying drawings.
As shown in Figures 1 to 4, a kind of loading machine booster pump piston core split seals structure, including piston core 1, seal 2 and piston 3, piston core 1 is provided with the seal groove 7 coordinated with seal 2, piston core 1 and seal 2 use split type sealing structure, i.e. piston core 1 and seal 2 are independent two structures, can separately change during damage, and be interference fit between seal groove 7 and seal 2, and the sectional area of seal groove 7 has rational filling rate and compression ratio more than the sectional area of seal 2 with guarantee seal 2；Wherein, seal 2 is O shape or D-shaped or rectangular configuration.
As it is shown in figure 5, loading machine is when driving a vehicle brake operating, compressed air forms braking oil pressure by the brake fluid in promoting gas piston 6 to drive push rod 5 to promote piston core 1 and the assembly of seal 2 and then drive piston 3 compression cylinder 4；Sealing between piston core 1 and piston 3 is realized by seal 2 in this process, and in conventional monolithic construction, seal 2 does not has the as easy as rolling off a log damage causing seal 2 of rational packing space.In this inventive structure, the seal groove 7 of piston core 1 is reserved rational packing space seal life through reasonably design to seal 2 and is greatly prolonged, and before and after braking, seal 2 state diagram is as shown in Figure 1 and Figure 2；Seal 2 and piston core 1 use interference fit simultaneously, and the length of seal 2 will not fall off phenomenon through calculating in reciprocating motion.
Claims (2)
1. a loading machine booster pump piston core split seals structure, including piston core (1), seal (2) and piston (3), described piston core (1) is provided with the seal groove (7) coordinated with seal (2), it is characterized in that: described piston core (1) and seal (2) use split type sealing structure, it is interference fit between described seal groove (7) and seal (2), and the sectional area of seal groove (7) has rational filling rate and compression ratio more than the sectional area of seal (2) with guarantee seal (2).
Loading machine booster pump piston core split the most according to claim 1 seals structure, it is characterised in that: described seal (2) is O shape or D-shaped or rectangle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610264311.8A CN105835858A (en) | 2016-04-26 | 2016-04-26 | Split sealing structure for piston core of loader booster pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610264311.8A CN105835858A (en) | 2016-04-26 | 2016-04-26 | Split sealing structure for piston core of loader booster pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105835858A true CN105835858A (en) | 2016-08-10 |
Family
ID=56589062
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610264311.8A Pending CN105835858A (en) | 2016-04-26 | 2016-04-26 | Split sealing structure for piston core of loader booster pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105835858A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB944921A (en) * | 1959-01-10 | 1963-12-18 | Girling Ltd | Improvements in seals |
| JP2000159088A (en) * | 1998-11-24 | 2000-06-13 | Bosch Braking Systems Co Ltd | Resin piston for master cylinder |
| CN201486791U (en) * | 2009-05-11 | 2010-05-26 | 芜湖盛力制动有限责任公司 | Air booster pump for vehicle braking |
| CN202300997U (en) * | 2011-09-28 | 2012-07-04 | 芜湖市安芜汽车制动元件有限公司 | Hydraulic piston of air boosting pump |
| CN205615506U (en) * | 2016-04-26 | 2016-10-05 | 山东临工工程机械有限公司 | Split type seal structure of loader thrust boosting pump piston core |
-
2016
- 2016-04-26 CN CN201610264311.8A patent/CN105835858A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB944921A (en) * | 1959-01-10 | 1963-12-18 | Girling Ltd | Improvements in seals |
| JP2000159088A (en) * | 1998-11-24 | 2000-06-13 | Bosch Braking Systems Co Ltd | Resin piston for master cylinder |
| CN201486791U (en) * | 2009-05-11 | 2010-05-26 | 芜湖盛力制动有限责任公司 | Air booster pump for vehicle braking |
| CN202300997U (en) * | 2011-09-28 | 2012-07-04 | 芜湖市安芜汽车制动元件有限公司 | Hydraulic piston of air boosting pump |
| CN205615506U (en) * | 2016-04-26 | 2016-10-05 | 山东临工工程机械有限公司 | Split type seal structure of loader thrust boosting pump piston core |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160810 |