CN204729245U - A kind of double piston manual variable capacity oil pump - Google Patents
A kind of double piston manual variable capacity oil pump Download PDFInfo
- Publication number
- CN204729245U CN204729245U CN201420773819.7U CN201420773819U CN204729245U CN 204729245 U CN204729245 U CN 204729245U CN 201420773819 U CN201420773819 U CN 201420773819U CN 204729245 U CN204729245 U CN 204729245U
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- piston
- valve
- variable capacity
- pressure
- oil pump
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Abstract
The utility model discloses a kind of double piston manual variable capacity oil pump.Comprise pump case, filler opening, oil outlet, one-way valve, also comprise first piston group and the second piston group, described piston group comprises large piston and small piston, also comprise the relief valve for regulating incoming pressure and output flow, described relief valve comprises pressure samples end and overflow ducts, and described overflow ducts communicates with the oil pocket of large piston; Described pressure samples end communicates with oil outlet; The diameter of described large piston is greater than the diameter of small piston.When output oil pressure exceedes the numerical value of fluid valve setting, fluid valve is opened, emptying after overflow ducts communicates with large piston, stop supply high pressure oil, be applicable to reducing the input flow rate of oil pump and increase the operation of delivery pressure, and it is simple and compact for structure, is easy to manufacture and processing.
Description
Technical field
The utility model relates to a kind of oil pump, especially double piston manual variable capacity oil pump.
Background technique
Plunger pump is an important device of hydraulic system, and it relies on plunger to-and-fro motion in cylinder body, makes the volume of seal operation cavity volume change to realize oil suction, force feed, is widely used in the occasion that pressure is higher.But general hand oil pump is when delivery pressure needs to increase, requires that the pressure of manually input or power synchronous increase, be unfavorable for manually working continuously.
Jack is that a kind of plunger or oil hydraulic cylinder of adopting lifts the lifting device of part as rigid top, in order to the weight that hoists, its simple structure, lightweight, be easy to carry, conveniently moving.The working principle of ordinary jack is that spanner up walks to drive small piston upwards, oil in fuel tank is sucked into small piston bottom by oil pipe and one-way cock, spanner is toward driving small piston downward when pressing down, fuel tank and small piston bottom oil circuit are blocked by one-way cock, the oil of small piston bottom is pressed into large piston lower portion by internal oil passages and one-way cock, because leverage small piston low pressure increases decades of times, large piston area is again the decades of times of small piston area, large piston is got into by the oil pressure manually produced, know that size piston area is than identical with pressure ratio by pascal's principle.So, power is on hand by spanner to small piston can increase more than ten times, such as 15 times, small piston can increase more than ten times equally to large piston force, such as 15 times, therefore, from the hand of people to large piston, or refer to the active part that stretches out when pushing up weight, strength increase multiple be 15X15=225 doubly, if on hand with every 20 kgfs, the strength of 20X225=4500 kilogram just can be produced.After being finished, have the valve manual unlocking that is closed at ordinary times, oil is just by being squeezed oil sump tank by the weight of determining weight by oil.
The flow of the manual backhaul of conventional hand oil jack is relatively fixing, and when top draws weight pressure progressively to increase, the pressure of artificial input needs synchronous increasing, causes inputting Manual pressure difficulty continuously; And when the pressure of need of work exceedes general human body limit, manually cannot operation be continued.
Summary of the invention
The purpose of this utility model is, provides a kind of double piston manual variable capacity oil pump, when working pressure increases gradually, makes incoming pressure relative equilibrium, is convenient to manually work continuously.
The technological scheme that enforcement the utility model adopts is: comprise pump case, filler opening, oil outlet, one-way valve, also comprise first piston group and the second piston group, described piston group comprises large piston and small piston, also comprise the relief valve for regulating incoming pressure and output flow, described relief valve comprises pressure samples end and overflow ducts, and described overflow ducts communicates with the oil pocket of large piston; Described pressure samples end communicates with oil outlet; The diameter of described large piston is greater than the diameter of small piston.The beneficial effects of the utility model are, when fuel pump output pressure is in relatively low pressure state, the first piston in two-piston group and the second piston fuel feeding simultaneously, can ensure at operating on low voltage district delivery rate fast, working efficiency is high.When fuel pump output pressure exceedes the numerical value of fluid valve setting, fluid valve is opened, and the large piston in two-piston group is communicated with overflow ducts, fuel cut-off; After relief valve is opened, when fuel pump output pressure increases within the scope of certain numerical value, need the pressure of manually input to reduce on the contrary, make the pressure relative equilibrium needing manually input, be convenient to manually work continuously, and it is simple and compact for structure, be easy to manufacture and processing.Large piston draining is conducive to reducing manual incoming pressure more, be more conducive to manually working continuously, and it is simple and compact for structure, is easy to manufacture and processing.
Further, the large piston of described piston group, small piston, oil outlet are respectively equipped with one-way valve.The beneficial effects of the utility model are, one-way valve is placed in internal piston, save space and manufactured materials, and reduce weight, structure is simple.
Further, described first piston group and the second piston group be arranged in parallel; Oily passage is established in described piston group inside.The beneficial effects of the utility model are, oily passage is placed in internal piston, save space and manufactured materials, and reduce weight, structure is simple.Be arrangeding in parallel of two groups of pistons, be conducive to increasing work efficiency, it is rationally distributed, simple and compact for structure, is easy to manufacture and processing.
Further, described relief valve comprises spool and valve pocket; Described spool to be placed in valve pocket and can to move vertically; One end of described spool is pressure samples end and communicates with oil outlet; Described spool and valve pocket are respectively equipped with overflow ducts.The beneficial effects of the utility model are, realize sampling, after pressure exceedes certain numerical value the pressure of filler opening, carry out overflow to the oil pocket of selected piston, realize the function of hand oil pump variable, its flow structure is simply compact, be easy to manufacture, flushing effect is stablized, long service life.
Further, described relief valve also comprises valve body, valve seat, spring seat, and described valve body is drawn after cylindrical body by pump case inside and formed; Described spring seat, spool, valve seat are placed in valve body successively.The beneficial effects of the utility model are, arrange relief valve in pump case, and it is simple and compact for structure, are easy to manufacture, and flushing effect is stablized, long service life.
Further, the cylindrical of described valve pocket has groove, radial direction porose, forms the overflow ducts of valve pocket after groove is communicated with hole; Described valve seat has axial hole and radial direction through hole and cylindrical breach respectively, and described axial hole, radial direction through hole, cylindrical breach communicate with oil outlet after being interconnected, and described valve seat 4 also has for carrying out spacing position-limitting mouth to spool.The beneficial effects of the utility model are, flow structure is simply compact, are easy to manufacture, and flushing effect is stablized, long service life.
Further, the shoulder intercoupled is had between overflow sleeve and valve pocket.The beneficial effects of the utility model are, limit the position of overflow sleeve, and its structure is simple, are easy to manufacture.
Further, the utility model also comprises the spanner simultaneously connecting first piston group and the second piston group; Described spanner comprises rocking bar, transmission shaft, rocking arm, and rocking bar and rocking arm connect transmission shaft respectively, and connecting rod is established at the two ends of rocking arm, and described piston group is provided with ball cup and is connected with connecting rod.The beneficial effects of the utility model are, during spanner pull-up, and one group of piston oil suction, hydraulic oil is pressed into high-pressure work oil district by another group piston; When spanner presses down, the exchange function of two groups of pistons.Make two groups of pistons can ensure to promote or push up act speed in operating on low voltage district fast, working efficiency is high.And its structure is simple, easy processing.
Accompanying drawing explanation
Fig. 1 is the utility model hydraulic principle schematic diagram.
Fig. 2 is the utility model schematic front view.
Fig. 3 is the utility model schematic side view figure.
Fig. 4 is the utility model schematic top plan view.
Embodiment
See Fig. 1, the present embodiment comprises pump case; Also comprise spanner 400, left hand piston group 100 and right hand piston group 101, left hand piston group 100 and right hand piston group 101 comprise large piston and small piston respectively, and the diameter of large piston is greater than the diameter of small piston; The large piston of left hand piston group 100 and right hand piston group 101 connects relief valve 500 simultaneously; Spanner 400 connects left hand piston group 100 and right hand piston group 101 simultaneously.Left hand piston group 100 and right hand piston group 101 be arranged in parallel.Left group piston 100 comprises the large piston in top, the bottom small piston that are connected successively, and right hand piston group 101 is identical.The large piston of left upper portion establishes one-way valve 601, bottom small piston establishes one-way valve 602, and in like manner, the large piston of right upper portion establishes one-way valve 603, lower right side small piston establishes one-way valve 604; Left hand piston group 100, right group piston group 101 establish one-way valve 605 and one-way valve 606 respectively with working voltage oil joint.The pressure samples port of relief valve 500 communicates with oil outlet 49.
See Fig. 1, when fuel pump output pressure is in relatively low pressure scope, the large piston of two groups of pistons and small piston fuel feeding simultaneously.During spanner 400 pull-up, one group of piston oil suction, hydraulic oil is pressed into high-pressure work oil district by another group piston; When spanner 400 presses down, the exchange function of the two groups of pistons in left and right.When working pressure exceedes the number range of fluid valve setting, fluid valve 500 is opened, large piston stops supply high pressure oil, only has small piston fuel feeding, after relief valve is opened, when delivery pressure increases within the specific limits, need the pressure of manually input to diminish on the contrary, make the pressure relative equilibrium needing manually input.
See Fig. 3, relief valve 500 comprises screw plug 2, bonded washer 3, valve seat 4, valve pocket 5, valve pocket O type circle 6, spool 7, spring seat 8, pressure regulator valve spring 9.Spool 7 is in valve pocket 5 and can move vertically, and the lower end of spool 7 is the pressure samples ends communicated with oil outlet 49.
See Fig. 3, relief valve also comprises valve body, and valve body is drawn after the cylindrical body with shoulder by pump case 1 inside and formed; Spring seat 8, spool 7, valve seat 4 are arranged in valve body successively, and the upper end of valve seat 4 has carries out spacing position-limitting mouth 501 to spool 7, and screw plug 2 and bonded washer 3 pairs of valve bodies seal.
See Fig. 3, the cylindrical of valve pocket 5 has groove, radial direction porose, forms the overflow ducts of valve pocket 5 after groove is communicated with hole; Valve seat 4 has axial hole and radial direction through hole and cylindrical breach respectively, communicates after axial hole, radial direction through hole, cylindrical breach are interconnected with oil outlet 49.
See Fig. 1, Fig. 2, Fig. 3, in pump case 1, overflow hole 50 communicates with the oil pocket of two large pistons, when the oil pressure of pressure samples end working voltage oil exceedes setting numerical value, the recessed structures at promotion spool 7 and middle part is moved, make curve bath 51, overflow hole 50, filler opening 52 all aim at the recessed structures in the middle part of spool 7 and be interconnected, realize the oil extraction pressure release of two large pistons.
See Fig. 2, piston assembly is formed primarily of plunger bushing 24, plunger bushing O type circle 25, large plunger O type circle 26, ball cup 27, spring collar 28, plunger 29, small piston ring 30, large piston ring 31.
See Fig. 1, Fig. 2, one-way valve 601 is formed primarily of big spring seat 32, large pump spring 33, upper steel ball 34; One-way valve 602 is formed primarily of lower steel ball 35, upper steel ball seat 36, little pump spring 37; One-way valve 605 is formed primarily of submissile spring abutment 38, spring stop piece 39, spring stop piece 40.Similarly, one-way valve 603, one-way valve 604, one-way valve 606 are symmetrically distributed in the opposite side in pump case 1 respectively.Have four one-way valve layouts inner in piston group, meanwhile, there is corresponding hydraulic oil channel the inside of two-piston group.
See Fig. 1, Fig. 2, Fig. 4, spanner 400 comprises the long rocking bar 42, short rocking bar 45, transmission shaft 10, the rocking arm 300 that are connected successively, and it is two connecting rods 23 that the two ends of rocking arm 300 connect respectively; The top of left hand piston group 100, the large piston group 101 in right side establishes ball cup 27, spring collar 28 respectively; All there is bulb one end of two connecting rods and is connected with ball cup 27 dynamic cooperation respectively; One end of transmission shaft 10 connects the middle part of rocking arm 300.
See Fig. 3, the black box of transmission shaft 10 is made up of gland 11, dust ring 12, gland O type circle 13, gland Cock screw 14; Cover plate 15 is fastening and establish cover plate O type circle 16, in case leak-stopping is oily by cover screw 22.
See Fig. 3, rocking arm 19 two ends connect connecting rod 23 by bearing pin 47, cotter pin 48; Meanwhile, rocking arm 19 is connected with the locking of transmission shaft 10 and is realized by rocking arm Cock screw 20; Transmission shaft 10 is rotated in spring bearing 17, positioning bearing 21; Setting sleeve 18 pairs of spring bearings 17 position.
See Fig. 3, Fig. 4, the end of holding of long rocking bar 42 is rubber sleeves 41; Long rocking bar 42 is connected by retainer 43, rocking bar steel ball 44 with short rocking bar 45; The connection of the fastening short rocking bar 45 of rocking bar screw 46 and transmission shaft 10.
List a kind of important technological parameters with two groups of piston embodiments below:
| Little pump maximum service pressure | 50MPa | Little pump plunger diameter | Φ17mm |
| Large pump maximum service pressure | 15MPa | Large pump plunger diameter | Φ30mm |
| Little pump maximum pump discharge | 11.3ml/ time | Rocking bar maximum deflection angle | ±29° |
| Large pump maximum pump discharge | 35.3ml/ time | Plunger range | 25mm |
In table, large pump refers to the pump that plunger bushing 24 region is formed; The pump that little pump refers to submissile spring abutment 38, space, spring stop piece 39 place is formed.
Claims (8)
1. a double piston manual variable capacity oil pump, comprise pump case, filler opening, oil outlet, one-way valve, it is characterized in that: also comprise first piston group and the second piston group, described piston group comprises large piston and small piston, also comprise the relief valve for regulating incoming pressure and output flow, described relief valve comprises pressure samples end and overflow ducts, and described overflow ducts communicates with the oil pocket of large piston; Described pressure samples end communicates with oil outlet; The diameter of described large piston is greater than the diameter of small piston.
2. a kind of double piston manual variable capacity oil pump according to claim 1, is characterized in that: the large piston of described piston group, small piston, oil outlet are respectively equipped with one-way valve.
3. a kind of double piston manual variable capacity oil pump according to claim 1, is characterized in that: described first piston group and the second piston group be arranged in parallel; Oily passage is established in described piston group inside.
4. a kind of double piston manual variable capacity oil pump according to claim 1, is characterized in that: described relief valve comprises valve pocket, spool, and described spool to be placed in valve pocket and can to move vertically, and one end of described spool is the pressure samples end communicated with oil outlet; Described spool and valve pocket are respectively equipped with overflow ducts.
5. a kind of double piston manual variable capacity oil pump according to claim 4, is characterized in that: described relief valve also comprises valve body, valve seat, spring seat, and described valve body is drawn after cylindrical body by pump case inside and formed; Described spring seat, spool, valve seat are placed in valve body successively.
6. a kind of double piston manual variable capacity oil pump according to claim 5, is characterized in that: the cylindrical of described valve pocket has groove, radial direction porose, forms the overflow ducts of valve pocket after groove is communicated with hole; There is recessed structures at the middle part of described spool as the overflow ducts of spool; Described valve seat has axial hole and radial direction through hole and cylindrical breach respectively, and described axial hole, radial direction through hole, cylindrical breach communicate with oil outlet after being interconnected, and described valve seat also has for carrying out spacing position-limitting mouth to spool.
7. a kind of double piston manual variable capacity oil pump according to claim 5 or 6, is characterized in that: have the shoulder intercoupled between valve pocket and valve body.
8. a kind of double piston manual variable capacity oil pump according to claim 1, is characterized in that: also comprise the spanner simultaneously connecting first piston group and the second piston group; Described spanner comprises rocking bar, transmission shaft, rocking arm, and rocking bar and rocking arm connect transmission shaft respectively, and connecting rod is established at the two ends of rocking arm, and described piston group is provided with ball cup and is connected with connecting rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420773819.7U CN204729245U (en) | 2014-12-10 | 2014-12-10 | A kind of double piston manual variable capacity oil pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420773819.7U CN204729245U (en) | 2014-12-10 | 2014-12-10 | A kind of double piston manual variable capacity oil pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204729245U true CN204729245U (en) | 2015-10-28 |
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ID=54387603
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420773819.7U Expired - Fee Related CN204729245U (en) | 2014-12-10 | 2014-12-10 | A kind of double piston manual variable capacity oil pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204729245U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109404273A (en) * | 2018-10-19 | 2019-03-01 | 湖州三井低温设备有限公司 | A kind of high pressure low temperature reciprocating pump cold end |
| CN110342421A (en) * | 2019-08-08 | 2019-10-18 | 台州市东鸿环保科技有限公司 | A kind of oil pump and method with fast lifting function |
| CN111279075A (en) * | 2017-10-20 | 2020-06-12 | Ifp新能源公司 | Rotary cartridge pump with separate guide and centering means for the cartridge |
-
2014
- 2014-12-10 CN CN201420773819.7U patent/CN204729245U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111279075A (en) * | 2017-10-20 | 2020-06-12 | Ifp新能源公司 | Rotary cartridge pump with separate guide and centering means for the cartridge |
| CN109404273A (en) * | 2018-10-19 | 2019-03-01 | 湖州三井低温设备有限公司 | A kind of high pressure low temperature reciprocating pump cold end |
| CN109404273B (en) * | 2018-10-19 | 2024-02-09 | 湖州三井低温设备有限公司 | Cold end of high-pressure low-temperature reciprocating pump |
| CN110342421A (en) * | 2019-08-08 | 2019-10-18 | 台州市东鸿环保科技有限公司 | A kind of oil pump and method with fast lifting function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151028 Termination date: 20171210 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |