CN203656542U - Variable displacement oil pump with decompression slot - Google Patents
Variable displacement oil pump with decompression slot Download PDFInfo
- Publication number
- CN203656542U CN203656542U CN201320869907.2U CN201320869907U CN203656542U CN 203656542 U CN203656542 U CN 203656542U CN 201320869907 U CN201320869907 U CN 201320869907U CN 203656542 U CN203656542 U CN 203656542U
- Authority
- CN
- China
- Prior art keywords
- pump
- oil
- gas pressure
- pressure relief
- relief slot
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- 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 - Lifetime
Links
- 238000006073 displacement reaction Methods 0.000 title claims abstract description 20
- 230000006837 decompression Effects 0.000 title abstract description 14
- 238000009434 installation Methods 0.000 claims description 17
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 74
- 239000010721 machine oil Substances 0.000 description 7
- 239000010705 motor oil Substances 0.000 description 6
- 238000007906 compression Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
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Abstract
The utility model discloses a variable displacement oil pump with a decompression slot. An oil pump oil outlet cavity and an oil pump oil sucking cavity are formed in a pump body and a pump cover; a regulating ring is arranged in the pump body; the outer circumference of the regulation ring is provided with a bulge; the radial outer end surface of the bulge is hermetically connected with the inner cavity; the bulge is provided with a first side surface and a second side surface along the circumferential direction; the first side surface faces a pressure control cavity communicated with the oil pump oil outlet cavity; the second side surface is connected with an adjusting mechanism; the bulge is provided with a third side surface and a fourth side surface along the radial direction; the third side surface is hermetically connected with the pump body; the fourth side surface is hermetically connected with the pump cover; the decompression slot is formed in the pump cover; one end of the decompression slot is communicated with the oil pump oil sucking cavity; the other end of the decompression slot is formed in the position, corresponding to the pump cover, of the fourth side surface. Whether the decompression slot and the pressure control cavity is communicated or not is controlled by using the feature that the position of the regulation ring of the variable displacement oil pump is changed along with the pressure change of oil, so the decompression function of the normal oil pump decompression valve is realized.
Description
Technical field
The utility model relates to oil pump field, refers to particularly a kind of change displacement oil pump with gas pressure relief slot.
Background technique
Tradition oil pump is due to structural limitations, and machine oil pump delivery is certain, and the rate of discharge of oil pump is directly proportional to oil pump rotating speed.Along with the raising of oil pump rotating speed, the rate of discharge of oil pump can proportional increase.So oil pump pumping ability surplus in the time of the high rotation speed operation of oil pump, engine oil pressure is higher, need to increase Decompression valves and release superfluous machine oil.
Although the change displacement oil pump that machinery is controlled can reduce machine oil pump delivery by controlling mechanism, in order to take into account the engine oil pressure requirement under each rotating speed, when high rotating speed, oil pump capacity also can be superfluous.
Release superfluous machine oil so need to increase Decompression valves; Tradition Decompression valves mechanism comprises: the parts such as plug screw, spring, guide rod, piston, complex structure and cost are high.
Summary of the invention
The purpose of this utility model is exactly the deficiency that will solve above-mentioned background technology, and a kind of simple in structure, change displacement oil pump with gas pressure relief slot that can release superfluous machine oil is provided.
The technical solution of the utility model is: a kind of change displacement oil pump with gas pressure relief slot, it comprises the pump housing and the pump cover of mutual coupling, described pump cover sealing is arranged on the pump housing, on the described pump housing and pump cover, offer oil pump and go out oil pocket and oil pump oil sucting cavity, in the described pump housing, offer inner chamber, the adjustment ring being connected with pump housing profile of tooth in described inner chamber, in described adjustment ring, be provided with the external rotor and the internal rotor that leave gap and can mutually rotate, described internal rotor is sleeved on the inner side of external rotor, it is characterized in that: the excircle of described adjustment ring is provided with projection, the radial outer end face of described projection is connected with bore seal, described projection is along circumferential the first side and the second side of being provided with, described the first side is towards pressure control cavity, described pressure control cavity is opened on the pump housing, pressure control cavity goes out oil pocket with oil pump and is communicated with, described the second side is connected with the free end of controlling mechanism, and the fixed end of described controlling mechanism is connected on the pump housing, described projection is radially provided with the 3rd side and the 4th side, and described the 3rd side and the pump housing are tightly connected, and described the 4th side and pump cover are tightly connected, it is also provided with the gas pressure relief slot being opened on pump cover, and one end of described gas pressure relief slot is communicated with oil pump oil sucting cavity, and the other end of described gas pressure relief slot is opened on the position of the corresponding pump cover in the 4th side.
In such scheme:
Described controlling mechanism comprises adjustment spring, and one end of described adjustment spring is connected with protruding another side, and the other end of adjusting spring is connected on the pump housing.
Described controlling mechanism is arranged in installation cavity, and described installation cavity is surrounded by the groove and the pump cover that are opened on the pump housing.
Described gas pressure relief slot is opened on the position of the pump cover that installation cavity is corresponding, and described gas pressure relief slot stretches out installation cavity and extends to the 4th side.
Further, the slot opening face width degree of described installation cavity is greater than the opening surface width of gas pressure relief slot.
Structural principle of the present utility model is:
1, when initial, the pressure that goes out oil pocket due to oil pump does not reach setting value, the pretightening force of controlling mechanism is greater than the effect of the pressure oil in pressure control cavity, projection in adjustment ring is stopped up the end of pressure control cavity, and the 4th side of the projection in adjustment ring cuts off end adjacent with pressure control cavity gas pressure relief slot, between pressure control cavity and gas pressure relief slot, do not communicate, pressure oil can not flow to gas pressure relief slot from pressure control cavity;
2, when the pressure that goes out oil pocket when oil pump is elevated to setting value gradually, the moment that now pressure oil in pressure control cavity applies adjustment ring is greater than the moment that controlling mechanism applies adjustment ring, adjustment ring moves to controlling mechanism direction, in the time that adjustment ring moves to certain position, the end that now gas pressure relief slot is arranged on the 4th side can be connected with pressure control cavity end, pressure oil can flow to gas pressure relief slot from pressure control cavity, pressure oil enters into the pump housing after walking around projection, pump cover, gas pressure relief slot, in the cavity that adjustment ring surrounds, remittance is arranged on the end of oil pump oil sucting cavity to gas pressure relief slot again, and flow in oil pump oil sucting cavity, reach the object of pressure release,
3, the pressure decreased that goes out oil pocket when oil pump is when to setting value, the moment that now pressure oil in pressure control cavity applies adjustment ring is less than the moment that controlling mechanism applies adjustment ring, adjustment ring return, in the time that adjustment ring is returned to certain position, projection in adjustment ring is stopped up the end of pressure control cavity, projection in adjustment ring the 4th side cuts off end adjacent with pressure control cavity gas pressure relief slot, between pressure control cavity and gas pressure relief slot, do not communicate, pressure oil can not flow to gas pressure relief slot from pressure control cavity.
The adjustment ring that the utility model utilization becomes displacement oil pump changes with engine oil pressure the characteristic that occurrence positions changes, control gas pressure relief slot and whether pressure control cavity is connected, and then realize the decompression function that common machine oil pump Decompression valves has, there is feature simple in structure, that cost is low, variation is reacted at any time according to engine oil pressure.
Accompanying drawing explanation
Fig. 1 is that the utility model overall structure is launched schematic diagram;
Fig. 2 is the structural representation of the pump housing;
Fig. 3 is the structural representation of adjustment ring pump cover in the time of initial position in the utility model;
Fig. 4 is the structural representation of pump cover when adjustment ring is to vent position in the utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
As Fig. 1, a kind of change displacement oil pump with gas pressure relief slot shown in Fig. 2, this becomes displacement oil pump into becoming discharge capacity rotor engine oil pump, it comprises the pump housing 1 and the pump cover 2 of mutual coupling, pump cover 2 sealings are arranged on the pump housing 1, on the pump housing 1 and pump cover 2, offer oil pump and go out oil pocket 7 and oil pump oil sucting cavity 8, in the pump housing 1, offer inner chamber, the adjustment ring 3 being connected with the pump housing 1 profile of tooth in inner chamber, in adjustment ring 3, be provided with the external rotor 4 and the internal rotor 5 that leave gap and can mutually rotate, internal rotor 5 is sleeved on the inner side of external rotor 4, on the excircle of adjustment ring 3, be provided with projection 11, the radial outer end face of projection 11 is connected with bore seal, projection 11 is along circumferential the first side and the second side of being provided with, the first side is towards pressure control cavity 10, pressure control cavity 10 is opened on the pump housing 1, pressure control cavity 10 is the profile of tooth joint with the pump housing 1 by adjustment ring 3, inner chamber, projection 11 in adjustment ring 3 and adjustment ring 3 surrounds, pressure control cavity 10 goes out oil pocket 7 with oil pump and is communicated with, the second side is connected with the free end of controlling mechanism, and the fixed end of controlling mechanism is connected on the pump housing 1, projection 11 is radially provided with the 3rd side and the 4th side, and the 3rd side and the pump housing 1 are tightly connected, and the 4th side and pump cover 2 are tightly connected, it is also provided with the gas pressure relief slot 9 being opened on pump cover 2, and one end of gas pressure relief slot 9 is communicated with oil pump oil sucting cavity 8, and the other end of gas pressure relief slot 9 is opened on the position of the corresponding pump cover 2 in the 4th side.
Because the oil pump in the utility model is for becoming displacement oil pump, adjustment ring 3 can change and occurrence positions variation along with the pressure oil in pressure control cavity 10.The utility model utilizes this principle to offer a gas pressure relief slot 9 exactly, the projection arranging by adjustment ring 3 outer ends is controlled gas pressure relief slot 9 and whether is connected with pressure control cavity 10, and then realize the energy of the pressure release that common machine oil pump Decompression valves has, have simple in structure, cost is low, change the feature of reaction at any time according to engine oil pressure.
Be specially:
1, with reference to Fig. 3, when initial, the pressure that goes out oil pocket 7 due to oil pump does not reach setting value, the pretightening force of controlling mechanism is greater than the effect of the pressure oil in pressure control cavity 10, projection 11 in adjustment ring 3 is stopped up the end of pressure control cavity 10, projection 11 in adjustment ring 3 the 4th side cuts off end adjacent with pressure control cavity 10 gas pressure relief slot 9, between pressure control cavity 10 and gas pressure relief slot 9, does not communicate, and pressure oil can not flow to gas pressure relief slot 9 from pressure control cavity 10;
2, with reference to Fig. 4, when the pressure that goes out oil pocket 7 when oil pump is elevated to setting value gradually, the moment that now pressure oil in pressure control cavity 10 applies adjustment ring 3 is greater than the moment that controlling mechanism applies adjustment ring 3, adjustment ring 3 moves to controlling mechanism direction, in the time that adjustment ring 3 moves to certain position, now gas pressure relief slot 9 be arranged on the 4th side end can with pressure control cavity 10 ends connect, pressure oil can flow to gas pressure relief slot 9 from pressure control cavity 10, pressure oil enters into the pump housing 1 after walking around projection 11, pump cover 2, installation cavity 12, gas pressure relief slot 9, in the cavity that adjustment ring 3 surrounds, remittance is arranged on the end of oil pump oil sucting cavity 8 to gas pressure relief slot 9 again, and flow in oil pump oil sucting cavity 8, reach the object of pressure release,
3, the pressure decreased that goes out oil pocket 7 when oil pump is when to setting value, the moment that now pressure oil in pressure control cavity 10 applies adjustment ring 3 is less than the moment that controlling mechanism applies adjustment ring 3, adjustment ring 3 is repositioned to the state shown in Fig. 3, projection 11 in adjustment ring 3 is stopped up the end of pressure control cavity 10, be that projection 11 the 4th side in adjustment ring 3 cuts off end adjacent with pressure control cavity 10 gas pressure relief slot 9, between pressure control cavity 10 and gas pressure relief slot 9, do not communicate, pressure oil can not flow to gas pressure relief slot 9 from pressure control cavity 10.
Controlling mechanism in the present embodiment comprises adjusts spring 6, and one end of adjusting spring 6 is connected with the another side of projection 11, and the other end of adjusting spring 6 is connected on the pump housing 1.
The present embodiment is arranged on above-mentioned controlling mechanism in installation cavity 12, and installation cavity 12 is surrounded by the groove and the pump cover 2 that are opened on the pump housing 1, and groove is rectangle groove.Installation cavity 12 can prevent from adjusting spring 6 can produce the phenomenon of irregular compression in compression process, and assurance controlling mechanism is normally worked.
The gas pressure relief slot 9 of the present embodiment is opened on the position of pump cover 2 of installation cavity 12 correspondences, gas pressure relief slot 9 stretches out installation cavity 12 and extends to the 4th side, and the slot opening face width degree of installation cavity 12 is greater than the opening surface width of gas pressure relief slot 9, controlling mechanism is placed in the cavity of " protruding " font like this, also has the phenomenon that prevents from adjusting spring 6 irregular compression of meeting generation in compression process.
The described gas pressure relief slot 9 of the present embodiment, also can be applied in blade type and become in displacement oil pump, this is all to have adjustment ring 3 meetings along with the pressure oil in pressure control cavity 10 changes and the characteristic of occurrence positions variation because of blade type change displacement oil pump or rotor change displacement oil pump.
Claims (5)
1. one kind has the change displacement oil pump of gas pressure relief slot, it comprises the pump housing (1) and the pump cover (2) of mutual coupling, described pump cover (2) sealing is arranged on the pump housing (1), on the described pump housing (1) and pump cover (2), offer oil pump and go out oil pocket (7) and oil pump oil sucting cavity (8), the described pump housing offers inner chamber in (1), the adjustment ring (3) being connected with the pump housing (1) profile of tooth in described inner chamber, in described adjustment ring (3), be provided with the external rotor (4) and the internal rotor (5) that leave gap and can mutually rotate, described internal rotor (5) is sleeved on the inner side of external rotor (4), it is characterized in that: the excircle of described adjustment ring (3) is provided with projection (11), the radial outer end face of described projection (11) is connected with bore seal, described projection (11) is along circumferential the first side and the second side of being provided with, described the first side is towards pressure control cavity (10), described pressure control cavity (10) is opened on the pump housing (1), pressure control cavity (10) goes out oil pocket (7) with oil pump and is communicated with, described the second side is connected with the free end of controlling mechanism, and the fixed end of described controlling mechanism is connected on the pump housing (1), described projection (11) is radially provided with the 3rd side and the 4th side, and described the 3rd side and the pump housing (1) are tightly connected, and described the 4th side and pump cover (2) are tightly connected, it is also provided with the gas pressure relief slot (9) being opened on pump cover (2), and one end of described gas pressure relief slot (9) is communicated with oil pump oil sucting cavity (8), and the other end of described gas pressure relief slot (9) is opened on the position of the corresponding pump cover in the 4th side (2).
2. the change displacement oil pump with gas pressure relief slot according to claim 1, it is characterized in that: described controlling mechanism comprises adjusts spring (6), one end of described adjustment spring (6) is connected with the another side of projection (11), and the other end of adjusting spring (6) is connected on the pump housing (1).
3. the change displacement oil pump with gas pressure relief slot according to claim 1 and 2, is characterized in that: described controlling mechanism is arranged in installation cavity (12), and described installation cavity (12) is surrounded by the groove and the pump cover (2) that are opened on the pump housing (1).
4. the change displacement oil pump with gas pressure relief slot according to claim 3, it is characterized in that: described gas pressure relief slot (9) is opened on the position of the pump cover (2) that installation cavity (12) is corresponding, and described gas pressure relief slot (9) stretches out installation cavity (12) and extends to the 4th side.
5. the change displacement oil pump with gas pressure relief slot according to claim 4, is characterized in that: the slot opening face width degree of described installation cavity (12) is greater than the opening surface width of gas pressure relief slot (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320869907.2U CN203656542U (en) | 2013-12-26 | 2013-12-26 | Variable displacement oil pump with decompression slot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320869907.2U CN203656542U (en) | 2013-12-26 | 2013-12-26 | Variable displacement oil pump with decompression slot |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203656542U true CN203656542U (en) | 2014-06-18 |
Family
ID=50922927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320869907.2U Expired - Lifetime CN203656542U (en) | 2013-12-26 | 2013-12-26 | Variable displacement oil pump with decompression slot |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203656542U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103742774A (en) * | 2013-12-26 | 2014-04-23 | 东风汽车公司 | Variable displacement oil pump with pressure relief groove |
| CN106764368A (en) * | 2015-11-23 | 2017-05-31 | 湖南机油泵股份有限公司 | A kind of novel gear type oil pump |
-
2013
- 2013-12-26 CN CN201320869907.2U patent/CN203656542U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103742774A (en) * | 2013-12-26 | 2014-04-23 | 东风汽车公司 | Variable displacement oil pump with pressure relief groove |
| CN106764368A (en) * | 2015-11-23 | 2017-05-31 | 湖南机油泵股份有限公司 | A kind of novel gear type oil pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |