CN210153520U - Rotor type oil pump capable of preventing air from entering oil inlet cavity - Google Patents
Rotor type oil pump capable of preventing air from entering oil inlet cavity Download PDFInfo
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- CN210153520U CN210153520U CN201921043725.3U CN201921043725U CN210153520U CN 210153520 U CN210153520 U CN 210153520U CN 201921043725 U CN201921043725 U CN 201921043725U CN 210153520 U CN210153520 U CN 210153520U
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Abstract
The utility model discloses a can prevent rotor formula oil pump that oil feed chamber admits air, which comprises a pump body, the pump cover, be equipped with the oil feed chamber on the pump body, an oil cavity, the rotor chamber, install inner rotor and the outer rotor to the rotor intracavity, the bottom in rotor chamber is equipped with each other communicating low-pressure groove and high-pressure groove, mode through bolted connection between the pump body and the pump cover combines to an organic whole, set up a sealed oil groove with an oil cavity intercommunication, sealed oil groove is located one side that is close to the rotor chamber relatively on the faying face between the pump body and the pump cover, sealed oil groove includes first half section and second half section, the sealed oil groove of first half section sets up in the periphery of oil feed chamber with an oil cavity intercommunication and correspondingly, the sealed oil groove of second half section sets up in the periphery of low-pressure groove correspondingly. The utility model provides a rotor formula oil pump can prevent effectively that the air from getting into the oil feed intracavity from the clearance on the faying face between the pump body and the pump cover, has reduced the emergence of insufficient and cavitation of oil absorption phenomenon, has very wide application prospect.
Description
Technical Field
The utility model relates to an oil pump technical field, in particular to can prevent rotor formula oil pump that the oil feed chamber admits air.
Background
The function of the oil pump is to ensure that oil circulates through the lubrication system and to deliver a sufficient amount of oil at any engine speed and with a sufficiently high pressure to the components to be lubricated. The oil pump can be divided into a gear type oil pump and a rotor type oil pump according to the structural form, and a driving inner rotor and a driven outer rotor of the rotor type oil pump are both arranged in a rotor cavity of a pump body. The inner rotor is fixed on the driving shaft, the outer rotor can rotate freely in the oil pump body, and a certain eccentric distance is arranged between the inner rotor and the outer rotor. When the inner rotor rotates to any angle, the tooth profile lines of each tooth of the inner rotor and the outer rotor can always be in point contact with each other. The rotor of the rotor type oil pump rotates to raise the oil pressure, namely, low-pressure oil in the oil inlet cavity is pressurized into high-pressure oil after entering the rotor cavity.
Chinese patent publication No. 109812684a discloses a rotor type oil pump directly driven by an engine crankshaft, which includes a pump body, a pump cover, and a rotor cavity, wherein a low pressure cavity and a high pressure cavity are provided at the bottom of the rotor cavity, which are not communicated with each other, an oil inlet and an oil outlet are provided on the pump body, the oil inlet is communicated with the low pressure cavity, the oil outlet is communicated with the high pressure cavity, a pump cover mounting groove is provided on a mounting surface of the pump body, and the pump cover is mounted in the pump cover mounting groove by screws. The rotor type oil pump is the same as other existing rotor type oil pumps in that the pump body and the pump cover are sealed by the joint surfaces, even if the pump cover is fastened by bolts and combined with the pump body, gaps still exist between the combined pump cover and the pump body, and air is easy to enter. Particularly for many oil pumps with two adjacent bolts far away due to space limitation, the joint surface at the periphery of the oil inlet cavity is easy to intake air. The problem that the air inlet of the oil inlet cavity is very troublesome is that the following two defects are caused: the first is easy to cause insufficient oil absorption, and the second is likely to cause cavitation, thereby affecting the normal use of the oil pump.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a can prevent the rotor formula oil pump that the oil feed chamber admits air, use this rotor formula oil pump can effectively reduce the emergence of insufficient and cavitation of oil absorption phenomenon.
In order to solve the technical problem, the utility model discloses a following technical scheme: a rotor type oil pump capable of preventing an oil inlet cavity from air inlet comprises a pump body and a pump cover, wherein the pump body is provided with an oil inlet cavity, an oil outlet cavity, a rotor cavity, an inner rotor and an outer rotor which are installed in the rotor cavity, the bottom of the rotor cavity is provided with a low-pressure groove and a high-pressure groove which are not communicated with each other, the oil inlet cavity is communicated with the low-pressure groove, the oil outlet cavity is communicated with the high-pressure groove, the pump body is provided with a plurality of bolt holes, the pump body and the pump cover are combined into a whole in a bolt connection mode, the pump body is provided with a sealing oil groove communicated with the oil outlet cavity, the sealing oil groove is positioned on the joint surface between the pump body and the pump cover, the sealed oil groove includes first half and latter half, and the sealed oil groove of first half just sets up with going out oil chamber intercommunication correspondingly in the periphery of oil feed chamber, the sealed oil groove of latter half sets up correspondingly in the periphery of low-pressure tank.
Preferably, the width of the sealing oil groove is 1mm, and the depth is 0.5 mm.
The oil inlet cavity and the oil outlet cavity are both located on the same side of the rotor cavity, and the oil inlet cavity is located below the oil outlet cavity.
Compared with the prior art, the utility model discloses following beneficial effect has: the rotor type oil pump capable of preventing air from entering the oil inlet cavity is characterized in that the pump body is provided with a sealing oil groove, the sealing oil groove sequentially passes through the outer side of the oil inlet cavity and the outer side of the low-pressure groove after being led out from the oil outlet cavity, and after high-pressure oil in the oil outlet cavity enters and is filled in the sealing oil groove, a sealing area for isolating external air is formed on a joint surface between the pump body and the pump cover, so that air is effectively prevented from entering the oil inlet cavity from the joint surface between the pump body and the pump cover. The utility model provides a rotor formula oil pump can prevent effectively that the air from getting into the oil feed intracavity from the clearance on the faying face between the pump body and the pump cover, has reduced the emergence of insufficient and cavitation of oil absorption phenomenon, has very wide application prospect.
Drawings
Fig. 1 is the whole structure diagram of the pump body of the middle rotor type oil pump.
The reference signs are:
1-pump body 2-oil inlet cavity 3-oil outlet cavity
4-low pressure groove 5-inner rotor 6-outer rotor
7-bolt hole 8-sealing oil groove 9-high pressure groove.
Detailed Description
In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
A rotor type oil pump capable of preventing an oil inlet cavity from air inlet is disclosed, as shown in figure 1, and comprises a pump body 1 and a pump cover, wherein the pump body 1 is provided with an oil inlet cavity 2, an oil outlet cavity 3, a rotor cavity, an inner rotor 5 and an outer rotor 6 which are installed in the rotor cavity, the bottom of the rotor cavity is provided with a low pressure groove 4 and a high pressure groove 9 which are not communicated with each other, the oil inlet cavity 2 is communicated with the low pressure groove, the oil outlet cavity 3 is communicated with the high pressure groove, the low pressure oil in the oil inlet cavity 2 is pressurized due to the movement of the inner and outer rotors after entering the rotor cavity to obtain high pressure oil in the oil outlet cavity 3, the pump body 1 is provided with a plurality of bolt holes 7 for installing the pump cover, the pump body 1 and the pump cover are combined into a whole in a bolt connection mode, the pump body 1 is provided with a sealing oil groove 8 communicated with the oil outlet cavity 3, the sealing oil groove 8 is positioned on, sealed oil groove 8 includes half preceding section and half back section, and half preceding section's sealed oil groove 8 and the chamber 3 intercommunication that produces oil, and half preceding section's sealed oil groove 8 sets up correspondingly in the periphery of advancing oil chamber 2, and half back section's sealed oil groove 8 sets up correspondingly in the periphery of low-pressure tank 4.
As shown in fig. 1, the rotor type oil pump capable of preventing air from entering the oil inlet chamber is provided with a sealing oil groove 8 on the pump body 1, after the sealing oil groove 8 is led out from the oil outlet chamber, the sealing oil groove 8 sequentially passes through the outer side of the oil inlet chamber 2 and the outer side of the low pressure groove 4, after high-pressure oil in the oil outlet chamber 3 enters and is filled in the sealing oil groove 8, a sealing area for isolating external air is formed on a joint surface between the pump body 1 and the pump cover, and therefore air is effectively prevented from entering the oil inlet chamber 2 from the joint surface between the pump body 1 and the pump cover. The utility model provides a rotor formula oil pump can prevent effectively that the air from getting into oil feed chamber 2 from the clearance on the faying face between the pump body 1 and the pump cover in, has reduced the emergence of insufficient and cavitation of oil absorption phenomenon. It should be clear to those skilled in the art that the pump cover is fixed to the pump body 1 by bolts through the bolt holes 7 of the pump body 1, and since the structure of the pump body 1 is improved by the present invention without involving the change of the structure of the pump cover, the structure of the pump cover mounted to the pump body 1 is not shown in fig. 1.
As a preferred embodiment in the present invention, the width of the sealing oil groove 8 is 1mm, and the depth is 0.5 mm.
In the above embodiment, the oil inlet chamber 2 and the oil outlet chamber 3 are both located on the left side of the rotor chamber, and the oil inlet chamber 2 is located below the oil outlet chamber 3.
The above-mentioned embodiment is the utility model discloses the implementation scheme of preferred, in addition, the utility model discloses can also realize by other modes, any obvious replacement is all within the protection scope of the utility model under the prerequisite that does not deviate from this technical scheme design.
In order to make it easier for those skilled in the art to understand the improvement of the present invention over the prior art, some drawings and descriptions of the present invention have been simplified, and in order to clarify, some other elements have been omitted from this document, those skilled in the art should recognize that these omitted elements may also constitute the content of the present invention.
Claims (3)
1. The utility model provides a can prevent rotor formula oil pump that oil feed chamber admits air, includes the pump body (1), pump cover, be equipped with oil feed chamber (2), play oil chamber (3), rotor chamber on the pump body (1), install inner rotor (5) and outer rotor (6) to the rotor intracavity, the bottom in rotor chamber is equipped with each other not communicating low-pressure groove (4) and high-pressure groove (9), oil feed chamber (2) with low-pressure groove (4) are linked together, go out oil chamber (3) with high-pressure groove (9) intercommunication, a plurality of bolt holes (7) have been seted up on the pump body (1), combine to an organic whole through bolted connection's mode between the pump body (1) and the pump cover, its characterized in that: a sealing oil groove (8) is formed in the pump body (1), the sealing oil groove (8) is located on a joint surface between the pump body (1) and the pump cover, the sealing oil groove (8) comprises a front half section and a rear half section, the sealing oil groove (8) of the front half section is communicated with the oil outlet cavity (3) and correspondingly arranged on the periphery of the oil inlet cavity (2), and the sealing oil groove (8) of the rear half section is correspondingly arranged on the periphery of the low-pressure groove (4).
2. The rotor type oil pump capable of preventing air from entering an oil inlet chamber, according to claim 1, is characterized in that: the width of the sealing oil groove (8) is 1mm, and the depth is 0.5 mm.
3. The rotor type oil pump capable of preventing air from entering an oil inlet chamber, according to claim 1, is characterized in that: the oil inlet cavity (2) and the oil outlet cavity (3) are both located on the same side of the rotor cavity, and the oil inlet cavity (2) is located below the oil outlet cavity (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921043725.3U CN210153520U (en) | 2019-07-05 | 2019-07-05 | Rotor type oil pump capable of preventing air from entering oil inlet cavity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921043725.3U CN210153520U (en) | 2019-07-05 | 2019-07-05 | Rotor type oil pump capable of preventing air from entering oil inlet cavity |
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| Publication Number | Publication Date |
|---|---|
| CN210153520U true CN210153520U (en) | 2020-03-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921043725.3U Active CN210153520U (en) | 2019-07-05 | 2019-07-05 | Rotor type oil pump capable of preventing air from entering oil inlet cavity |
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| CN (1) | CN210153520U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110206994A (en) * | 2019-07-05 | 2019-09-06 | 湖南机油泵股份有限公司 | A kind of rotor-type oil pump preventing oil suction chamber air inlet |
-
2019
- 2019-07-05 CN CN201921043725.3U patent/CN210153520U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110206994A (en) * | 2019-07-05 | 2019-09-06 | 湖南机油泵股份有限公司 | A kind of rotor-type oil pump preventing oil suction chamber air inlet |
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