A kind of vane pump
The present invention relates to a kind of vane pump, a kind of vane pump applied in injection machine is especially designed.
It is well known that hydraulic vane pump is the power source of hydraulic system, it has the distinguishing features such as low noise, high pressure,
It is widely used in the fields such as lathe, molding machine, leather machine, metal forming machinery, engineering machinery.
In present patent document, the introduction on vane pump also has a lot, for example, Chinese patent：A kind of " vane pump
（CN202441597U）", including the pump housing, pump cover, main shaft, pump core, oil distribution casing, pump cover are fixedly arranged on the pump housing, the pump housing and pump cover it
Between constitute the inner chamber of accommodating pump core and oil distribution casing, main shaft is arranged in pump cover, and pump core is sheathed on main shaft, and oil distribution casing is located at pump core
Between the pump housing, one end end face of oil distribution casing is close to pump core, provided with compression bullet between the other end end face and the pump housing of oil distribution casing
Spring, therefore in pump core followed by the long-term rotation process of main shaft, oil distribution casing can begin under the elastic compensating effect of holddown spring
Whole holding is close to pump core, so that the lubricating oil on oil distribution casing timely and effectively can be delivered in pump core.
The technical problem of use or the solution of vane pump in existing file, is vane pump normal work, one mostly
As the spinning solution of vane pump be all same direction, the situation when oil suction force feed of rotating forward, hydraulic vane pump is in loaded work piece
During, if being stopped immediately or when the servomotor working speed of servo-drive system is down to 0, pump intra vane is by oil liquid pressure
Impact, causes oil pump to invert in right amount, produces and impacts and occur noise, unfavorable on the overall performance of oil pump and influence people sense of hearing.
And stopped status often occurs in injection machine, therefore it is typically all that power source is used as using gear pump.If made with vane pump
For the power source of injection machine, influence largely can be produced on blade and vane pump, influence the service life of vane pump.
The content of the invention
The invention provides one kind is simple in construction, frequent shutdown is adapted to, it is allowed to which blade is suitably inverted, reduced in reversion
Noise, a kind of vane pump applied on injection machine of service life length；Solve blade pump configuration present in prior art
Excessively complicated, it is impossible to allow blade to invert, reversion noise is big, the affected technical problem of service life.
The above-mentioned technical problem of the present invention is solved by following technical proposals：A kind of vane pump, including the pump housing, in pump
Power transmission shaft is provided with vivo, and rotor is socketed with power transmission shaft, stator is externally provided with rotor, leaf is evenly equipped between rotor and stator
Piece, oil distribution casing is provided with the both sides of rotor, and oil distribution casing includes the oil suction oil distribution casing and force feed oil distribution casing positioned at rotor both sides, turned
Space forms oil pocket between son, stator, blade and oil distribution casing, and oil pocket is divided into according to the state and function during vane pump rotating forward work
Oil suction area, laminated oil zone and seal area, seal area be located between oil suction area and laminated oil zone, the oil suction area described in composition stator or
Oilhole is offered on oil distribution casing.
Oil pocket is divided according to the number of blade, and how many blade is with regard to how many oil pocket, and oil suction area, seal area
With laminated oil zone divided according to the change of oil pressure in cavity, an oil suction area potentially includes multiple oil pockets, likewise, a pressure
Oily area or seal area may also include multiple oil pockets, and which oily area oil pocket, which belongs to, is judged according to the pressure in oil pocket.
Vane pump is in normal work, and power transmission shaft rotates forward rotor driven and rotated forward, vane pump shape when power transmission shaft rotates a circle
Pressed oil into 2 oil suctions and 2 times, each oil pocket volume in oil suction area changes from small to big, thus produce vacuum, the connection oil-feed of oil suction area
Mouth carries out oil suction, and each oil pocket volume of laminated oil zone is that from large to small, hydraulic oil is squeezed, and laminated oil zone connection oil-out is carried out
When vane pump is applied on injection machine, because injection machine needs frequent shutdown, therefore the rotating speed of power transmission shaft is produced
0 is down to, now the blade in vane pump receives oil liquid pressure impact, causes oil pump to invert in right amount.Oil suction area now is due to turning
The reversion of son, from large to small, and each oil pocket volume of laminated oil zone changes from small to big each oil pocket volume in oil suction area, therefore oil suction area and
The function reversion of both laminated oil zones.The oil pocket in oil suction area is tapered into, and hydraulic oil is squeezed, and the oil pocket of laminated oil zone gradually becomes
Greatly.Therefore through hole is opened up in the cavity in the oil suction area when rotating forward, can be when vane pump be inverted, quick draining prevents blade
Pump excessively inverts influence service life, while the noise problem that thus reduction brings.And in pump housing normal work, through hole can be with
As oil inlet oil-feed, accelerate, into speed oil, to improve pump housing pressure.
Preferably, described oilhole is opened in oil suction area close to the side of seal area.Oilhole is opened in oily area's change
In first cavity, that is to say, that in oil suction area in maximum oil pocket, and it is that side in cavity close to seal area so that
The pump housing carries out draining when there is Reversion once going to the oil suction area very first time, so as to prevent reversion.
Oilhole can be opened on stator, can also be opened on oil suction oil distribution casing or force feed oil distribution casing.Preferably,
Described oilhole is opened on oil suction oil distribution casing, and described oilhole penetrates into other one by the side of side plate along transmission direction of principal axis
Side, oilhole is connected with the inlet port on the pump housing.Oil suction oil distribution casing is located at transmission shaft end, and simple in construction, interference part is few, because
This opens up oilhole on oil suction oil distribution casing, and technique is simple to operation.
Preferably, described oilhole has two, respectively on oil suction oil distribution casing close to inlet port side, oilhole with
Communication groove is provided between inlet port on oil suction oil distribution casing.It is oil suction twice due to possessing vane pump and presses oil twice, therefore
It is required to arrange oilhole in all oil suction areas so that stress equalization, smooth running.Inlet port on oilhole and oil suction oil distribution casing it
Between by communication groove be interconnected, can preferably draining or rotate forward when oil suction.
Preferably, described blade is 12, oil pocket includes Liang Ge oil suctions area, two laminated oil zones and two seal areas,
Each cavity volume in oil suction area is become larger, and each cavity volume of laminated oil zone is tapered into, and described oilhole is opened in oil suction area
The maximum cavity of cavity volume in.The inner chamber of stator is ellipse, rotor and stator coaxial rotating, the size of oil pocket with
The position difference for blade rotation is changed.Oilhole is opened in maximum one of cavity volume, it is ensured that exchanged in oily area
When, the energy very first time effective off-load is greatly decreased until eliminating and recoiled, effectively protects oil pump reliably working, and eliminate recoil
Therefore, a kind of vane pump of the invention possesses following advantages：Close to seal area in maximum cavity in oil suction area
Side sets oilhole so that oil pump is able to effective off-load when recoiling moment, is greatly decreased until eliminating and recoils, effectively protection
Oil pump reliably working, and eliminate the noise of recoil.Oilhole is opened on oil suction oil distribution casing, convenient processing, and draining effect is good.
Brief description of the drawings
Fig. 1 is a kind of schematic diagram of vane pump of the present invention.
Fig. 2 is the schematic diagram for the vane pump pump core that Fig. 1 inner stators, rotor and blade are constituted.
Fig. 3 is the front view of the oil suction oil distribution casing in Fig. 1.
Fig. 4 is Fig. 3 rearview.
Below by embodiment, and with reference to accompanying drawing, the technical scheme to invention is described in further detail.
As illustrated in fig. 1 and 2, a kind of vane pump, including the pump housing and pump core and power transmission shaft 10 in the pump housing.The pump housing includes
Procapsid 1 and back casing 9 positioned at the left and right sides, inlet port 3 is offered on procapsid 1, force feed is offered on back casing 9
Mouth 6.Pump core include be located at power transmission shaft 10 on and with the rotor 7 of the synchronous rotary of power transmission shaft 10, offer blade groove on rotor 7
16, blade 5 is plugged with blade groove 16, stator 4 is socketed with the external peripheral surface of rotor 7, the center of stator 4 offers ellipse
Circular hole, stator 4 and the coaxial rotating of rotor 7, space is left between stator 4 and rotor 7.In vane pump normal work, leaf
Piece 5 is under the centrifugal action of rotor 7, and stator 4 is pressed close in one end of blade 5 all the time.Oil suction is installed in the both sides of pump core with oil
Disk 2 and force feed oil distribution casing 8, oil suction oil distribution casing 2 are located at inlet port side, and force feed oil distribution casing 8 is located at force feed mouth side.Oil suction is with oil
The end face of disk 2 and force feed oil distribution casing 8 presses close to two end faces of rotor, therefore, oil is constituted by oil distribution casing, stator, rotor and blade
Chamber 12.Due to the center of stator open up for ellipse hole, therefore, when blade is rotated with rotor, the volume meeting of oil pocket 12
Produce change.In vane pump normal work, that is, during the rotating forward of rotor 7, the volume of oil pocket 12 changes from small to big to form oil suction area,
Oil suction is carried out, after seal area, the volume of oil pocket forms laminated oil zone from large to small, is pressed oil.12 are included in the present embodiment
Individual blade, forms 12 oil pockets 12, including Liang Ge oil suctions area, two seal areas and two laminated oil zones, oil suction area and laminated oil zone it
Between by seal area be connected.Oil suction area, seal area and laminated oil zone all include multiple oil pockets, oil suction area close to seal area that
Oil pocket 12 is the oil pocket of the volume maximum in oil suction area, is offered in this maximum oil pocket of volume position adjacent with seal area
Oilhole 11, oilhole 11 is opened on the oil suction oil distribution casing 2 for constituting cavity.
As shown in Figures 3 and 4, offer two symmetrical oil suction openings 14 on oil suction oil distribution casing and two be arranged symmetrically
Force feed opening 13, is respectively machined with an oilhole 11, oilhole 11 is connected with suction by communication groove 15 near two oil suction openings 14
Oil suction opening 14 on oily oil distribution casing 2.Oilhole 11 is opened near the oil suction opening 14 of oil suction oil distribution casing 2, oilhole 11 and oil suction
The lower edge of oil distribution casing oil suction opening 14 is located on same camber line.
When vane pump is applied on injection machine, due to the frequent shutdown of injection machine, if being stopped or servo system immediately
When the servomotor working speed of system is down to 0, pump intra vane is impacted by oil liquid pressure, causes oil pump to invert in right amount, produces punching
Hit and noise occur.When inverting, oil suction area is changed into laminated oil zone, when inverting beginning, due to having oilhole in oil suction area,
Draining can be quickly realized, so as to reduce oil liquid pressure impact, vane pump service life is improved.