CN208396921U - A kind of gear pump - Google Patents

Abstract

The utility model discloses a kind of gear pump, including pump shaft and mounting base, pump shaft is connect by bearing with mounting base and pump shaft is axis；It further include the packing set on pump shaft periphery.Bearing is arranged in gear pump provided by the utility model outside pump shaft, and pump shaft is made not vulnerable to impurity effect, to ensure the normal use of gear pump during rotation, improve the working performance of gear pump；Replace mechanical seal by the way of packing_seal simultaneously, reduces gear pump maintenance cost.

Description

A kind of gear pump

Technical field

The utility model relates to oil-servicing facilities technical fields, more specifically to a kind of gear pump.

Background technique

Gear pump, which is a kind of, to be the equipment of blower bearing shell, fluid coupling fuel feeding, during the work time, a pair of of gear In pump body intermeshing rotation, to have the liquid of certain viscosity to be expelled to the other side from pump housing side.

In the prior art, axle sleeve is set usually between pump shaft and mounting base to reduce the abrasion of equipment, in use process In, axle sleeve is gap-matched with mounting base using interference fit, with pump shaft.In gear pump long-time stopping process, axle sleeve Impurity is easily accessible between pump shaft, and since gap between the two is smaller, a small amount of impurity can lead to axle sleeve or pump shaft mill Damage.

In addition, generalling use mechanical seal in the prior art, machine seal cooling water, which is easy the dirty fouling of knot, leads to machine envelope damage, and The higher cost of more transducer set machine envelope causes the maintenance cost of gear pump high.

In conclusion how to reduce the abrasion of gear pump while reducing maintenance cost, be current those skilled in the art urgently Problem to be solved.

Utility model content

In view of this, long-term shutdown is not allowed to be also easy to produce after restarting the purpose of the utility model is to provide a kind of gear pump Abrasion, working performance with higher and lower maintenance cost.

To achieve the goals above, the utility model provides the following technical solutions:

A kind of gear pump, including pump shaft and mounting base, the pump shaft are axis, and the pump shaft passes through bearing and the installation Seat connection；It further include the packing set on the pump shaft periphery.

Preferably, the periphery of the packing is equipped with pedestal, and the end of the packing, which is equipped with, is sheathed on the pump shaft periphery Gland.

Preferably, the gland is fixedly connected by bolt with the pedestal.

Preferably, the inner wall of the mounting base is step type.

Preferably, the tooth-formation of gear of the gear pump is herringbone.

Preferably, the two sides of the gear of the same pump shaft are equipped with the bearing and the mounting base.

Preferably, the inner ring of the pump shaft and the bearing is interference fit.

Gear pump provided by the utility model includes pump shaft and mounting base, wherein pump shaft be axis, pump shaft and mounting base it Between be equipped with bearing；Pump shaft periphery is equipped with packing.

Pump shaft in the prior art is connect by axle sleeve with mounting base, and axle sleeve and pump shaft relatively rotate during the work time. Since gap between the two is small, axle sleeve and pump shaft can be worn into a small amount of impurity, influences the normal use of gear pump.

Pump shaft in the application is connect by bearing with mounting base, and phase occurs bearing for its inner ring and outer ring during the work time To rotation, since the gap between inner ring and outer ring is relatively large, into impurity after bearing itself is influenced it is relatively small, and not It will affect the normal rotation between bearing inner race and pump shaft.The setting of bearing makes pump shaft during rotation not vulnerable to impurity shadow It rings, ensures the normal use of gear pump.

In addition, gear pump provided by the present application uses packing_seal compared to mechanical seal, relative low price is reduced Maintenance cost.

Detailed description of the invention

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only It is the embodiments of the present invention, for those of ordinary skill in the art, without creative efforts, also Other attached drawings can be obtained according to the attached drawing of offer.

Fig. 1 is the mounting base and bearing assembled state schematic diagram of gear pump provided by the utility model；

Fig. 2 is the schematic diagram of packing_seal provided by the utility model.

In Fig. 1-2:

1 it is mounting base, 2 be bearing, 3 be gland, 4 be pedestal, 5 is packing.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

The core of the utility model is to provide a kind of gear pump, and long-term shutdown is not allowed to be also easy to produce abrasion after restarting, and has Higher working performance and lower maintenance cost.

Fig. 1 and Fig. 2 are please referred to, Fig. 1 is that the mounting base of gear pump provided by the utility model and bearing assembled state show It is intended to；Fig. 2 is the schematic diagram of packing_seal provided by the utility model.

The utility model provides a kind of gear pump, including pump shaft and mounting base 1, and pump shaft is connected by bearing 2 and mounting base 1 It connects and pump shaft is axis；It further include the packing 5 set on pump shaft periphery.

Specifically, there are two the pump shafts of gear pump, it is provided with driving gear on a pump shaft, is provided on another pump shaft The Fuel injection system of gear pump is realized in driven gear, driving gear and driven gear intermeshing rotation.Wherein tooth-formation of gear can Think that straight-tooth, helical teeth or double helical tooth, concrete shape can be selected according to actual needs.

Bearing 2 is arranged between pump shaft and mounting base 1, it is therefore intended that reduces the friction of the two.In bearing 2 generally includes Circle, outer ring, roller and support, in use, the inner ring of bearing 2 and outer ring relatively rotate.Wherein inner ring can be with pump Axis interference fit；Spline can also be set in pump shaft periphery, the side wall of 2 inner ring of bearing is correspondingly arranged on keyway, realizes 2 He of bearing The cooperation of pump shaft.

The inner wall of mounting base 1 is in step type, and the outer ring of its inner wall and bearing 2 is interference fitted in the assembled condition.Specifically, Mounting hole is provided in the middle part of mounting base 1 to be set in the periphery of pump shaft, while mounting base 1 is additionally provided with for fixing bearing 2 Fixed hole, wherein fixed hole and mounting hole are coaxially disposed and internal diameter is greater than the internal diameter of mounting hole.When 2 outer ring of bearing with When the side wall fitting of 1 fixed hole of mounting base, the step surface of mounting base 1 can play the role of preventing bearing 2 in axial sliding.It can Choosing, the thickness of mounting base 1 can also be consistent with the thickness of bearing 2, and the inner wall of mounting base 1 does not have cascaded surface at this time.

In view of in assembling process, step-like pump shaft may inconvenient bearing 2 normal mounting, therefore pump shaft uses The diameter of axis structure, i.e. pump shaft is consistent, and does not have cascaded surface, to facilitate the installation of bearing 2.

Gear pump provided by the present application subtracts the abrasion for reducing pump shaft using bearing 2.It is axis due to relatively rotating 2 inner ring and outer rings are held, and gap between the two is larger, even if pump shaft and bearing 2 will not be seriously affected into a small amount of impurity The synchronous rotation of inner ring, and then ensured the normal work of gear pump.Also therefore, bearing 2 is longer than the service life of axle sleeve, phase The maintenance cost of gear pump should be reduced.

It should be noted that gear pump in the prior art is commonly equipped with shaft sleeve installation seat.Therefore, provided by the present application The mounting base 1 of bearing 2 can be directly process using shaft sleeve installation seat.Specifically, former shaft sleeve installation seat is carried out local expansion Hole machined can directly obtain the mounting base 1 of the bearing 2 in the application at stepped understructure.And the pump in the application Axis is axis, equally can directly be processed on the basis of former stairstepping pump shaft, obtain axis structure.

In addition, since there are two pump shafts altogether for gear pump, and the gear two sides of each pump shaft are required to setting axle sleeve or bearing 2 Etc. the part that can reduce friction.Therefore, in a specific embodiment provided by the present application, the two sides of the gear of each pump shaft are equal Can be equipped with bearing 2 and mounting base 1, i.e., gear pump be arranged altogether four bearings 2 and with its one-to-one mounting base 1.

In actual use, gear pump usually requires setting sealing structure.It mostly uses greatly in the prior art mechanical close Envelope, however since the cooling water of mechanical seal is using erosion ring water, erosion ring water refers to that the water in river carries out simple mistake after precipitating The industry water formed is filtered, impurity is more.Cooling water can tie dirty, fouling after gear pump is shut down for a long time, be again started up gear pump When be easy to cause machine envelope damage.And the rotating ring of mechanical seal needs to be used cooperatively with multi-diameter shaft with stationary ring, uses axis in pump shaft In the case where, gear pump provided by the present application replaces mechanical seal in the prior art using the sealing of packing 5.

When repairing to gear pump, more transducer set machine envelope needs to spend that thousand yuan are even more and maintenance time is longer, and Replacement packing 5 is more convenient and packing 5 is cheap only needs dozens of yuan.Therefore, gear pump provided by the present application substantially reduces The time of maintenance and cost.

Optionally, in order to fix packing 5, the periphery of packing 5 is equipped with pedestal 4, and the end of packing 5, which is equipped with, to be sheathed on outside pump shaft The gland 3 in week.Specifically, pedestal 4 is circular shell structure, it is internal for filling packing 5, the tool of the packing 5 of required filling Body material, circle number are subject to actual demand.Gland 3 is the plate structure that middle part is equipped with through-hole.The wherein end of gland 3 and pedestal 4 Portion can be fixed using modes such as bolt, bondings.

Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other The difference of embodiment, the same or similar parts in each embodiment may refer to each other.

Gear pump provided by the utility model is described in detail above.Specific case used herein is to this The principle and embodiment of utility model is expounded, the above embodiments are only used to help understand the utility model Method and its core concept.It should be pointed out that for those skilled in the art, it is practical new not departing from this Under the premise of type principle, several improvements and modifications can be made to this utility model, these improvement and modification also fall into this reality With in novel scope of protection of the claims.

Claims (7)

1. a kind of gear pump, including pump shaft and mounting base (1), which is characterized in that the pump shaft is axis, and the pump shaft passes through axis (2) are held to connect with the mounting base (1)；It further include the packing (5) set on the pump shaft periphery.

2. gear pump according to claim 1, which is characterized in that the periphery of the packing (5) is equipped with pedestal (4), described The end of packing (5) is equipped with the gland (3) for being sheathed on the pump shaft periphery.

3. gear pump according to claim 2, which is characterized in that the gland (3) is solid by bolt and the pedestal (4) Fixed connection.

4. gear pump according to claim 1, which is characterized in that the inner wall of the mounting base (1) is step type.

5. gear pump according to claim 1, which is characterized in that the tooth-formation of gear of the gear pump is herringbone.

6. gear pump described in -5 any one according to claim 1, which is characterized in that the two sides of the gear of the same pump shaft It is equipped with the bearing (2) and the mounting base (1).

7. gear pump according to claim 6, which is characterized in that the inner ring of the pump shaft and the bearing (2) is interference Cooperation.