CN205226853U

CN205226853U - Oil pump body

Info

Publication number: CN205226853U
Application number: CN201521026423.7U
Authority: CN
Inventors: 刘守林; 王帆; 罗保田; 樊建熙
Original assignee: CHONGQING YUNHAI MACHINERY MANUFACTURING CO LTD
Current assignee: CHONGQING YUNHAI MACHINERY MANUFACTURING CO LTD
Priority date: 2015-12-13
Filing date: 2015-12-13
Publication date: 2016-05-11
Anticipated expiration: 2025-12-13

Abstract

The utility model discloses an oil pump body, including low pressure chamber, high pressure chest, rotor cavity, the oil inlet is connected in the low pressure chamber, the oil -out is connected to the high pressure chest, still is provided with the oil -recovery tank on this oil pump body, the oil -recovery tank centers on rotor cavity and high pressure chest, oil -recovery tank intercommunication low pressure chamber the oil -recovery tank with low pressure chamber intercommunication department sets up one -way drain membrane, be provided with the sealing washer around the oil -recovery tank, the voltage limiting passageway is connected to the high pressure chest. The utility model relates to a leakproofness of oil pump has greatly been increased, machine oil can be saved simultaneously.

Description

A kind of oil pump pump housing

Technical field

The utility model relates to auto parts and components field, particularly relates to a kind of oil pump pump housing.

Background technique

Oil pump is in lubrication system, and machine oil can be forced to deliver to the device of engine movement part from oil sump.Be used for making engine oil pressure raise and ensure certain oil mass, the parts of fuel feeding are forced to each friction surface. internal-combustion engine extensively adopts gear type and rotor-type oil pump. and gear-type oil pump structure is simple, easy to process, reliable operation, long service life, pump oil pressure is high, to be used widely. rotor pump rotor body is complicated, multiplex powder metallurgy pressing. the advantage that this pump has gear pump same, but compact structure, volume is little, and the application on internal-combustion engine gets more and more.

The feature of gear type oil pump is reliable operation, and structure is simple, easily manufactured higher with pump oil pressure, so be widely adopted.When the engine operates, the actuation gear on camshaft drives the driving gear of oil pump, the driving gear be fixed on driving gear shaft is rotated, thus drives the reciprocal rotation of driven tooth crop rotation, machine oil is delivered to out oil pocket from oil suction chamber along backlash and pump wall.Like this, oil suction chamber place just forms low pressure and produces suction, the machine oil inspiration oil pocket in oil sump.Because driving and driven gear constantly rotates, machine oil is just constantly pressed to the position of needs.

Between the oil pump pump housing and pump cover, there is the gap of connection, unavoidably can cause the leakage of machine oil.

Model utility content

In view of the above, the purpose of this utility model is to provide a kind of oil pump pump housing, solves prior art Problems existing.

The utility model adopts following technological scheme:

A kind of oil pump pump housing, comprise low-pressure cavity, hyperbaric chamber, rotor chamber, described low-pressure cavity connects filler opening, described hyperbaric chamber connects oil outlet, this oil pump pump housing is also provided with oil-return groove, and described oil-return groove is around rotor chamber and hyperbaric chamber, and described oil-return groove is communicated with low-pressure cavity, arrange unidirectional liquid guide membrane at described oil-return groove and described low-pressure cavity connectivity part, it is conducting direction that described unidirectional liquid guide membrane prolongs described oil-return groove to low-pressure cavity direction; Seal ring is provided with around described oil-return groove.

The utility model provides a kind of oil pump pump housing, preferably, described oil-return groove and low-pressure cavity connectivity part are provided with the fluting for installing unidirectional liquid guide membrane, described unidirectional liquid guide membrane comprises fixed block, described fixed block center is circular film body, described fixed block both sides arrange symmetrical seal ring, and described seal ring matches with described fluting.

The utility model provides a kind of oil pump pump housing, and preferably, described hyperbaric chamber connects pressure limiting passage.

Advantage of the present utility model and beneficial effect are:

1. the utility model is provided with a circle oil-return groove around rotor chamber and hyperbaric chamber, and oil-return groove is communicated with low-pressure cavity, when oil pump works, the machine oil revealed can enter oil-return groove, enter low-pressure cavity by oil-return groove, not only increase the sealing of oil pump, a large amount of machine oil can also be saved.

2. the utility model has a circle seal ring in oil-return groove arranged outside, and seal ring can prevent machine oil from revealing from oil-return groove, further increases the sealability of oil pump.

3. the utility model is provided with unidirectional liquid guide membrane at oil-return groove and low-pressure cavity connectivity part, and machine oil can only flow to low-pressure cavity from oil-return groove, cannot flow to oil-return groove from low-pressure cavity, prevents machine oil from entering oil-return groove from low-pressure cavity and is full of by oil-return groove and loses the function of oil return.

4. the unidirectional oriented film of the utility model design is easy for installation, and be convenient to change, mounting portion has good sealing simultaneously, prevents seepage.

Accompanying drawing explanation

Carry out describing in detail or preferably to preferred implementation of the present utility model below in conjunction with accompanying drawing.

Fig. 1 is the schematic diagram of a kind of oil pump pump housing of the utility model.

Fig. 2 is the enlarged view of the utility model oil-return groove and low-pressure cavity connectivity part.

Fig. 3 is the schematic diagram of the utility model unidirectional liquid guide membrane.

Fig. 4 is the plan view of the utility model unidirectional liquid guide membrane.

In figure: 1, low-pressure cavity; 11, filler opening; 2, hyperbaric chamber; 21, oil outlet; 3, rotor chamber; 4, oil-return groove; 41, slot; 5, unidirectional liquid guide membrane; 51, fixed block; 52, film body; 53, seal ring; 6, seal ring; 7, pressure limiting passage.

Embodiment

The embodiment of a kind of oil pump pump housing of composition graphs 1 pair of the utility model is described further.

A kind of oil pump pump housing, comprise low-pressure cavity 1, hyperbaric chamber 2, rotor chamber 3, described low-pressure cavity 1 connects filler opening 11, described hyperbaric chamber 2 connects oil outlet 21, it is characterized in that: this oil pump pump housing is also provided with oil-return groove 4, described oil-return groove 4 is around rotor chamber 3 and hyperbaric chamber 2, and described oil-return groove 4 is communicated with low-pressure cavity 1, arrange unidirectional liquid guide membrane 5 at described oil-return groove 4 and described low-pressure cavity 1 connectivity part, it is conducting direction that described unidirectional liquid guide membrane 5 prolongs described oil-return groove 4 to low-pressure cavity 1 direction; Seal ring 6 is provided with around described oil-return groove 4.

Described oil-return groove 4 and low-pressure cavity 1 connectivity part are provided with the fluting 41 for installing unidirectional liquid guide membrane 5, described unidirectional liquid guide membrane 5 comprises fixed block 51, described fixed block center is circular film body 52, described fixed block 51 both sides arrange symmetrical seal ring 53, described seal ring 53 matches with described fluting 41, and fixed block 51 can directly snap in fluting 41, easy for installation, be convenient to change, seal ring 53 can ensure the sealing at fluting 51 place.

When having enforcement, in rotor chamber, inner and outer rotors is installed, machine oil enters low-pressure cavity 1 from filler opening 11, hyperbaric chamber 2 is entered under the effect of inner and outer rotors, again from each mechanism that oil outlet 21 transports, in normal work, because the pump housing and pump cover are connected with gap, machine oil can be revealed from gap, around rotor chamber 3 and hyperbaric chamber 2, oil-return groove 4 is set, the machine oil revealed can enter oil-return groove 4, low-pressure cavity 1 is got back to through oil-return groove 4, when oil pump runs up, hyperbaric chamber 2 pressure is larger, the machine oil entering oil-return groove 4 increases, reveal from oil-return groove 4 for avoiding machine oil, a circle seal ring 6 is provided with around oil-return groove 4, seal ring 6 has ensured the sealability of oil pump further.

Because oil-return groove 4 is communicated with low-pressure cavity 1, in oil-feed process, machine oil may enter oil-return groove 4 from low-pressure cavity, such oil-return groove 4 can lose the function of oil return, at oil-return groove 4 and low-pressure cavity 1 connectivity part, unidirectional liquid guide membrane 5 is set, make machine oil enter low-pressure cavity 1 from oil-return groove 4 and oil-return groove 4 cannot be entered from low-pressure cavity 1, ensure that oil-return groove 4 can realize oil return function.

Hyperbaric chamber 2 is communicated with pressure limiting passage 7, and at pressure limiting passage 7, place is provided with pressure-limit valve, and when hyperbaric chamber 2 internal pressure is excessive, pressure-limit valve is opened, and machine oil is got rid of by pressure limiting passage 7, reduces pressure in hyperbaric chamber 2, oil pump is normally worked, and prevents from damaging.

Last it is noted that the foregoing is only preferred embodiment of the present utility model; be not limited to the utility model; although be described in detail the utility model with reference to previous embodiment; for a person skilled in the art; it still can be modified to the technological scheme described in foregoing embodiments; or equivalent replacement is carried out to wherein portion of techniques feature; all within spirit of the present utility model and principle; any amendment of doing, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.

Claims

1. an oil pump pump housing, comprise low-pressure cavity (1), hyperbaric chamber (2), rotor chamber (3), described low-pressure cavity (1) connects filler opening (11), described hyperbaric chamber (2) connects oil outlet (21), it is characterized in that: this oil pump pump housing is also provided with oil-return groove (4), described oil-return groove (4) is around rotor chamber (3) and hyperbaric chamber (2), described oil-return groove (4) is communicated with low-pressure cavity (1), at described oil-return groove (4) and described low-pressure cavity (1) connectivity part, unidirectional liquid guide membrane (5) is set, it is conducting direction that described unidirectional liquid guide membrane (5) prolongs described oil-return groove (4) to low-pressure cavity (1), described oil-return groove (4) is provided with seal ring (6) around.

2. a kind of oil pump pump housing according to claim 1, it is characterized in that: described oil-return groove (4) and low-pressure cavity (1) connectivity part are provided with the fluting (41) for installing unidirectional liquid guide membrane (5), described unidirectional liquid guide membrane (5) comprises fixed block (51), described fixed block center is circular film body (52), described fixed block (51) both sides arrange symmetrical seal ring (53), and described seal ring (53) matches with described fluting (41).

3. a kind of oil pump pump housing according to claim 1, is characterized in that: described hyperbaric chamber (2) connects pressure limiting passage (7).