CN206972512U - A kind of trapped fuel pump - Google Patents

Abstract

The utility model provides a kind of trapped fuel pump, including suction side and outlet side, and pass through the transmission device and motor connection in pump case, pump case is correspondingly arranged on suction inlet and outlet on suction side and outlet side, suction side is the open column shape container that one end is connected with pump case, suction inlet is arranged at the side of open column shape container, and the distance of any one place and outlet side is smaller than reference plane and the distance of outlet side on suction inlet.Use the trapped fuel pump with said structure, when pump is disposed vertically, the height of suction inlet is higher than open column shape container bottoms, due to the stop of suction inlet lower reservoir wall, the oil for always having remaining is left on open column shape container bottom, when such next time opens pump, the lubricating oil of remaining can immediately wick into pump chambers, lubrication is served, to filling oil inside the pump, operation difficulty is alleviated without separately one group of oil pump of configuration, saves time and cost.

Description

A kind of trapped fuel pump

Technical field

It the utility model is related to pump field, more particularly to a kind of trapped fuel pump.

Background technology

Screw pump is to engage spatial volume change and movement with what screw rod was formed to convey liquid or be allowed to by the pump housing The drum pump of supercharging.Screw pump is divided into single-screw (single screw) pump, Quimby pump and three screw pump etc. by screw rod number.When driving screw rod rotates When, drive the driven screw engaged to rotate together, the screw rod engagement spatial volume of suction chamber one end gradually increases, pressure drop It is low.Liquid enters engagement spatial volume under differential pressure action.When volume increases to maximum and forms an annular seal space, liquid just exists One by one continuously along axial movement in annular seal space, until discharge chamber one end.At this moment the screw rod engagement space for discharging chamber one end holds Product is gradually reduced, and liquid is discharged.The operation principle of screw pump is similar to gear pump, simply be instead of in structure with screw rod Gear, with flow trim, pressure fluctuation is small, has low suction capacity, noise, efficiency high, long lifespan, reliable operation, especially Vortex is not formed during pumped (conveying) medium, to the sticky insensitive of medium, can transfer of highly viscous medium, therefore obtained widely should With.

Fig. 1 is refer to, screw pump of the prior art, suction side 01 is followed successively by from bottom to top, is wrapped in pump case 05 Screw parts 02, outlet side 03, driving shaft 04, and by driving shaft 04 and motor connection.Sometimes for screw pump with plumbness Work, then enter the vertical immersion of suction side in screw pump 01 in liquid, carry out extraction liquid, that is to say, that sucked in suction side 01 Liquid flow direction at mouth 011 after use, screw pump is taken out from liquid, then in screw pump parallel to axial direction All liquid because Action of Gravity Field can all flow out from suction side 01, and until using screw pump next time, it is necessary to internally Portion's part progress is oily, now just needs to configure another group of oil pump inoculated oil or manually fills oil, obtains each part To after lubrication, could use, therefore the screw pump of this structure uses the preceding waste plenty of time on lubrication work is started every time, Add operation difficulty and time and cost.

Utility model content

The utility model provides a kind of trapped fuel pump, for solving the above problems.

To reach above-mentioned purpose, the utility model provides a kind of trapped fuel pump, including suction side and outlet side, and passes through position In transmission device and motor connection in pump case, the pump case is correspondingly arranged on suction inlet and discharge on suction side and outlet side Mouthful, the suction side is the open column shape container that one end is connected with the pump case, and the suction inlet is arranged at the open column shape The side of container, and liquid flow direction is perpendicular to the axial direction of trapped fuel pump at the suction inlet, by the open column shape container Bottom surface away from the pump case is defined as reference plane, and the distance of any one place and the outlet side is smaller than institute on the suction inlet State the distance of reference plane and the outlet side.

Preferably, the open column shape container and the integrated shaping of the pump case.

Preferably, the trapped fuel pump is screw pump.

Preferably, the transmission device is an at least screw rod, the open column shape container is located at the one of the screw rod End.

Preferably, be provided with end cap on the suction inlet, the distance of the reference plane and the screw rod end be more than or Person is equal to the external diameter of the end cap.

Preferably, be additionally provided with a drain tap in the reference plane, at the drain tap liquid flow direction with it is described Liquid flow direction is vertical at suction inlet.

Preferably, the distance of the drain tap and the suction inlet be more than the axis of the pump and the suction inlet away from From.

Compared with prior art, the beneficial effects of the utility model are：The utility model provides a kind of trapped fuel pump, including Suction side and outlet side, and by the transmission device and motor connection in pump case, the pump case is in suction side and outlet side On be correspondingly arranged on suction inlet and outlet, the suction side is the open column shape container that one end is connected with the pump case, described Suction inlet is arranged at the side of the open column shape container, and at the suction inlet liquid flow direction perpendicular to trapped fuel pump Axially, the bottom surface of the open column shape container away from the pump case is defined as reference plane, on the suction inlet any one place with The distance of the outlet side is smaller than the distance of the reference plane and the outlet side.Using the trapped fuel pump with said structure, Because its bottom has an open column shape container, liquid flow direction then hangs down perpendicular to the axial direction of trapped fuel pump when by pump at suction inlet During straight placement, the height of suction inlet is higher than open column shape container bottoms, due to the stop of suction inlet lower reservoir wall, always there is remaining Oil be left on open column shape container bottom, when next time opens pump, remaining lubricating oil can immediately wick into pump chambers, serve lubrication Effect, fill without another group of oil pump inoculated oil of configuration or manually oil.

Brief description of the drawings

Fig. 1 is the sectional view of screw pump in the prior art；

Fig. 2 and Fig. 3 is the structural representation of trapped fuel pump provided by the utility model.

In Fig. 1：01- suction sides, 011- suction inlets, 02- screw parts, 03- outlet sides, 04- driving shafts, 05- pump cases；

In Fig. 2-Fig. 3：10- suction sides, 11- suction inlets, 12- end caps, 20- outlet sides, 21- outlets, 30- pump cases, 50- Open column shape container, 51- reference planes, 52- drain taps.

Embodiment

To enable above-mentioned purpose of the present utility model, feature and advantage more obvious understandable, below in conjunction with the accompanying drawings to this The embodiment of utility model is described in detail.

To reach above-mentioned purpose, the utility model provides a kind of trapped fuel pump, refer to Fig. 2, including suction side 10 and row Go out end 20, and by the transmission device and motor connection in pump case 30, the pump case is on suction side 10 and outlet side 20 Suction inlet 11 and outlet 21 are correspondingly arranged on, the suction side 10 is that one end and the open column shape of the integrated molding of pump case 30 hold Device 50, such as hollow cuboid or hollow cylinder, suction inlet 11 are arranged at the side of the open column shape container 50, so existed Liquid flow direction is perpendicular to the axial direction of trapped fuel pump at suction inlet 11, by the open column shape container 50 away from the pump case 30 Bottom surface is defined as reference plane 51, and the distance of any one place and the outlet side 20 is smaller than the reference plane on the suction inlet 11 51 with the distance of the outlet side 20.

Continue referring to Fig. 2, that is to say, that when the trapped fuel pump is placed vertically, the height of the lowest part of suction inlet 11 It is greater than the height at the place of reference plane 51.So when trapped fuel pump stops oil suction, due to the chamber wall below suction inlet 11 Stop, necessarily residual part oil is between suction inlet 11 and reference plane 51.

It is preferred that the trapped fuel pump is screw pump, that is to say, that transmission device is an at least screw rod, the open tubular column Shape container 50 is located at one end of the screw rod, then when screw pump reuses, screw pump is inverted, now in suction inlet 11 A part of oil remained between reference plane 51 can be lubricated to flowing at screw rod to screw rod.

It is preferred that refer to Fig. 3, end cap 12, the reference plane 51 and the screw rod end are provided with the suction inlet 11 The distance in portion is more than or equal to the external diameter of the end cap 12.

It is preferred that be additionally provided with a drain tap 52 in the reference plane 51, at the drain tap 52 liquid flow direction with Liquid flow direction is vertical at the suction inlet 11, usually, the distance of drain tap 52 and suction inlet 11 be more than the axis of pump with The distance of suction inlet 11, will if need not can open drain tap 52 between suction inlet 11 and reference plane 51 during oil residues The oil of the residual is released out of drain tap 52.

The utility model provides a kind of trapped fuel pump, including suction side 10 and outlet side 20, and by pump case 30 Transmission device and motor connection, the pump case 30 be correspondingly arranged on suction side 10 and outlet side 20 suction inlet 11 and discharge Mouth 21, the suction side 10 are the open column shape container 50 that one end is connected with the pump case 30, and the suction inlet 11 is arranged at institute The side of open column shape container 50 is stated, and liquid flow direction is perpendicular to the axial direction of trapped fuel pump at the suction inlet 11, by institute State bottom surface of the open column shape container 50 away from the pump case 30 and be defined as reference plane 51, any one place and institute on the suction inlet 11 The distance for stating outlet side 20 is smaller than the distance of the reference plane 51 and the outlet side 20.Use the trapped fuel with said structure Pump, because its bottom has an open column shape container 50, at suction inlet 11 liquid flow direction perpendicular to the axial direction of trapped fuel pump, then when When pump is disposed vertically, the height of suction inlet 11 is higher than the bottom surface of open column shape container 50, due to the lower reservoir wall of suction inlet 11 Stop, the oil for always having remaining is left on the bottom of open column shape container 50, and so next time is in use, pump is inverted, the remaining oil It can flow into inside pump, serve lubrication, to being drained the oil inside the pump, the time is saved without separately one group of oil pump of configuration The usage amount of cost and lubricating oil.

Obviously, it is new without departing from this practicality can to carry out various changes and modification to utility model by those skilled in the art The spirit and scope of type.If these modifications and variations of the present utility model belong to the utility model claims and its equivalent technologies Within the scope of, then the utility model is also intended to including these changes and modification.

Claims (7)

1. a kind of trapped fuel pump, including suction side and outlet side, and by the transmission device and motor connection in pump case, it is described Pump case is correspondingly arranged on suction inlet and outlet on suction side and outlet side, it is characterised in that the suction side be one end with The open column shape container of the pump case connection, the suction inlet are arranged at the side of the open column shape container, and in the suction Porch liquid flow direction defines bottom surface of the open column shape container away from the pump case perpendicular to the axial direction of trapped fuel pump On the basis of face, the distance of any one place and the outlet side is smaller than the reference plane and the outlet side on the suction inlet Distance.

2. trapped fuel pump as claimed in claim 1, it is characterised in that the open column shape container and the pump case it is integrated into Type.

3. trapped fuel pump as claimed in claim 2, it is characterised in that the trapped fuel pump is screw pump.

4. trapped fuel pump as claimed in claim 3, it is characterised in that the transmission device is an at least screw rod, described hollow Column shape container is located at one end of the screw rod.

5. trapped fuel pump as claimed in claim 4, it is characterised in that be provided with end cap on the suction inlet, the reference plane with The distance of the screw rod end is more than or equal to the external diameter of the end cap.

6. trapped fuel pump as claimed in claim 5, it is characterised in that a drain tap is additionally provided with the reference plane, it is described to let out Oil port liquid flow direction is vertical with liquid flow direction at the suction inlet.

7. trapped fuel pump as claimed in claim 6, it is characterised in that the distance of the drain tap and the suction inlet is more than described The distance of the axis of pump and the suction inlet.