CN208073969U - One-piece crankshaft and pulsed plunger pump - Google Patents

Abstract

The utility model discloses one-piece crankshaft and pulsed plunger pumps, the one-piece crankshaft, including disc crank, two crank-pins that are eccentric and being symmetrically disposed in crank both sides, two trunnions being coaxially disposed respectively with the crank, and it is correspondingly connected with the changeover portion of the crankpin and trunnion, the crank, crank-pin, changeover portion and trunnion are integrally formed.The utility model crank, crank-pin and trunnion cast entirety using integrated monolithic construction, two crank-pins and trunnion with crank, grind sequence technique through grinding machine to ensure the requirement of its depth of parallelism, can meet complicated working condition and propose requirements at the higher level to pulsed bent axle.

Description

One-piece crankshaft and pulsed plunger pump

Technical field

The utility model belongs to plunger pump technique field, and in particular to one-piece crankshaft and pulsed plunger pump.

Background technology

High-pressure plunger pump pulsed crank mechanism, it is the weight for piston reciprocation movement by the convert rotational motion of prime mover Want component, when work, it will bear periodic alternating load, generate the distorting stress and bending stress of alternation, therefore pulse Formula crank mechanism is most important transmission parts.

The above-mentioned prior art has the following disadvantages；

1, existing pulsed crank mechanism, it is fitted together by a pair of of eccentric shaft and toothed disc, and integral song is combined Axis, eccentric shaft crank-pin install integral bearing before being assembled with toothed disc, the depth of parallelism between trunnion and crank-pin on eccentric shaft Design requirement can be reached by special equipment, but after two components fit together, the depth of parallelism is very between two crank-pins and trunnion It is difficult to guarantee depth of parallelism requirement, has bounce when connecting rod being caused to be rotated around crank pin bearing, connecting rod is toward a lateral deviation, and galloping etc. is no Good phenomenon directly affects its service life

Utility model content

The purpose of the utility model is to overcome the deficiencies in the prior art, provide a kind of one-piece crankshaft, which sets Depth of parallelism requirement is effectively ensured in meter.

Another purpose of the utility model is to provide a kind of pulsed plunger pump, using integrated bearing and bearing shell knot Structure, and phenomena such as be equipped with forced feed lubrication, rotate steady zero deflection, not only reduced cost but also improved efficiency.

The utility model is achieved through the following technical solutions：

A kind of one-piece crankshaft, including disc crank, two crank-pins that are eccentric and being symmetrically disposed in crank both sides, Two trunnions being coaxially disposed respectively with the crank, and it is correspondingly connected with the transition of the crankpin and trunnion Section, the crank, crank-pin, changeover portion and trunnion are integrally formed.

In the above-mentioned technical solutions, further include the grease channel being formed in inside bent axle.

In the above-mentioned technical solutions, the grease channel includes the end channel for being formed in left trunnion center, is formed The transition passage being connected in left connection part and with end channel, the intermediate channel being formed in crank, and it is correspondingly arranged at the right side In connecting pin and tail channel of the opening on the outside of right trunnion, wherein further include first channel of the open side on the outside of left trunnion.

In the above-mentioned technical solutions, centered on crank, trunnion is outside, and circular arc mistake is formed on the outside of changeover portion Cross face.

In the above-mentioned technical solutions, coaxially it is fixedly installed gear ring on the crank.

In the above-mentioned technical solutions, the gear ring is interference fitted with the crank.

A kind of pulsed plunger pump, including gear-box, the one-piece crankshaft and drive shaft, the bent axle by Driving can be rotatably set in gear-box, the drive shaft and the bent axle coaxial arrangement and drive connection.

In the above-mentioned technical solutions, the trunnion can be rotatably set in by bearing shell between gear-box.

In the above-mentioned technical solutions, further include the oil supply mechanism being connected to the end channel.

In the above-mentioned technical solutions, the oil supply mechanism includes fuel tank, oil transfer pump, and is serially connected on pipeline road Filter.

It the advantages of the utility model and has the beneficial effect that：

The utility model crank, crank-pin and trunnion using integrated monolithic construction, two crank-pins and trunnion with Crank casts entirety, grinds sequence technique through grinding machine to ensure the requirement of its depth of parallelism, can meet complicated working condition to pulsed song Axis proposes requirements at the higher level.

It is excellent that the utility model pulsed piston structure is novel, simple, installation operation is convenient, adaptable, cost performance is high etc. Point can promote crank-pin in arbitrary reciprocating pump field and trunnion casts overall processing, and high speed shaft gear and toothed disc are ratcheting, band Dynamic crank-pin and trunnion rotation, toothed disc and bent axle are integrally formed by interference fit, and connecting rod is mounted on crank-pin, crank Pin rotation drives connecting rod to realize that its piston reciprocation moves.

Description of the drawings

Fig. 1 is the structural schematic diagram of the gear-box of the utility model embodiment pulsed plunger pump.

Fig. 2 show gear box structure schematic diagram.

Wherein：

1：Drive shaft, 2：Trunnion, 3：Crank-pin, 4：Toothed disc, 5：Connecting rod, 6：Changeover portion, 7：Grease channel, 8：It is bent Handle.

It for those of ordinary skill in the art, without creative efforts, can be according to above attached Figure obtains other relevant drawings.

Specific implementation mode

In order to make those skilled in the art more fully understand the utility model, with reference to specific embodiment into one Step illustrates the technical solution of the utility model.

Embodiment one

A kind of one-piece crankshaft, including disc crank 8, two crank-pins that are eccentric and being symmetrically disposed in crank both sides 3, two trunnions 2 being coaxially disposed with the crank, and it is correspondingly connected with the changeover portion of the crankpin and trunnion 6, the crank, crank-pin, changeover portion and trunnion are integrally formed.

Wherein, the part that base bearing is fixed on the machine body, two trunnions are installed, body hole must be done on trunnion spindle end To concentric, crank-pin refers to the position being connect with big end on bent axle, it and trunnion decentraction, crank-pin rotate a circle most The stroke of the long as plunger pump of big rotation, crank are mainly used to carry out power transmission, by the crank of major diameter, realize effect of slowing down Fruit.

Wherein, crank, crank-pin and trunnion are cast with crank using integrated monolithic construction, two crank-pins and trunnion It is integral, sequence technique is ground through grinding machine to ensure the requirement of its depth of parallelism, can meet complicated working condition and pulsed bent axle is proposed Requirements at the higher level.

Meanwhile gear ring is coaxially fixedly installed on the crank, the gear ring and the crank mistake It is full of cooperation.That is, toothed disc is mounted on the crank between two crank-pins, it is integrally formed by interference fit and bent axle.Toothed disc It is that gear on drive shaft i.e. high speed shaft engages, realizes its rotary motion, then drive crank-pin, make crank-pin around main shaft Neck, which is done, to be rotated, and then realizes that fixed journey system moves back and forth, and high speed shaft gear is driven by motor, it is and the mutual tooth of toothed disc It closes, high speed shaft gear is synchronous with motor, and the number of teeth is few, and speed is fast, and the toothed disc number of teeth is more, and speed is slow, and then realizes and slow down.

Preferably, stress stress is improved, centered on crank, trunnion is outside, and circle is formed on the outside of changeover portion Arc transition face.

The pulsed crank mechanism of high-pressure plunger pump described in the utility model, which has, rotates flexible, stable and reliable operation The advantages that, it is a kind of novel pulsed crank mechanism, this also provides guarantee for the safe and effective operation of high-pressure plunger pump.

Embodiment two

Further include the grease channel being formed in inside bent axle on the basis of first embodiment, the lubricating oil is logical Road includes the end channel for being formed in left trunnion center, the transition passage for being formed in left connection part and being connected to end channel, shape At the intermediate channel in crank, and it is correspondingly arranged at the tail channel in right connecting pin and being open on the outside of right trunnion, In, further include first channel of the open side on the outside of left trunnion.

By the way of forced feed lubrication, effectively improve bent axle traveling comfort, and continued using one end or continue into First the mode of oil, oil inlet can be realized to the lubrication at maneton, repairing second may be implemented, and using the side of inner straight Formula reduces the setting of internal or external pipeline, improves the globality of equipment.

Embodiment three

The utility model also discloses a kind of pulsed plunger pump, including gear-box simultaneously, the one-piece crankshaft, with And drive shaft, the bent axle is driven to be can be rotatably set in gear-box, and the drive shaft and the bent axle are coaxial Setting and drive connection.Trunnion as mentioned can be rotatably set in by bearing shell between gear-box.The connecting rod and crank Pin connection end is two split and bolted semicircles.That is, connecting rod 10 is connected with bent axle, end uses two or two groups of bolts The split circle 11,12 of 13 connections realizes connection, and split annulus 12 and the ontology of connecting rod are integrally formed, and two split annulus pass through method Blue formula design, which utilizes, to be bolted, the inconvenience of suit is avoided, moreover, the inner sleeve in split circle is rubbed equipped with axle sleeve with reducing, The axle sleeve is with crankpin clearance fit to realize rotation.

The pulsed plunger pump of the utility model is replaced bearing with bearing shell using one-piece crankshaft, is equipped with pressure profit It is sliding, it is steady around crank-pin, bearing rotary through manufacturing experimently back link, phenomena such as zero deflection, not only reduced cost but also improved efficiency.

Preferentially, further include the oil supply mechanism being connected to the end channel, the oil supply mechanism includes fuel tank, oil transportation It pumps, and the filter being serially connected on pipeline road.

It is excellent that the utility model pulsed piston structure is novel, simple, installation operation is convenient, adaptable, cost performance is high etc. Point can promote crank-pin in arbitrary reciprocating pump field and trunnion casts overall processing, and high speed shaft gear and toothed disc are ratcheting, band Dynamic crank-pin and trunnion rotation, toothed disc and bent axle are integrally formed by interference fit, and connecting rod is mounted on crank-pin, crank Pin rotation drives connecting rod to realize that its piston reciprocation moves.

The spatially relative terms such as "upper", "lower", "left", "right" have been used in embodiment for ease of explanation, have been used for Relationship of the elements or features relative to another elements or features shown in definition graph.It should be understood that in addition to figure Shown in except orientation, spatial terminology is intended to include the different direction of device in use or operation.For example, if in figure Device be squeezed, the element for being stated as being located at other elements or feature "lower" will be located into other elements or feature "upper". Therefore, exemplary term "lower" can include both upper and lower orientation.Device, which can be positioned in other ways, (to be rotated by 90 ° or position In other orientation), it can be interpreted accordingly used herein of the opposite explanation in space.

Illustrative description has been done to the utility model above, it should explanation, in the core for not departing from the utility model In the case of the heart, it is any it is simple deformation, modification or other skilled in the art can not spend creative work etc. The scope of protection of the utility model is each fallen with replacing.

Claims (8)

1. a kind of one-piece crankshaft, which is characterized in that eccentric and be symmetrically disposed in the two of crank both sides including disc crank A crank-pin, two trunnions being coaxially disposed respectively with the crank, and it is correspondingly connected with the crank-pin and main shaft The changeover portion of neck, the crank, crank-pin, changeover portion and trunnion are integrally formed.

2. one-piece crankshaft according to claim 1, which is characterized in that further include that the lubricating oil being formed in inside bent axle leads to Road.

3. one-piece crankshaft according to claim 2, which is characterized in that the grease channel includes being formed in left master The end channel of journal centre, the transition passage for being formed in left connection part and being connected to end channel, is formed in the centre in crank Channel, and it is correspondingly arranged at the tail channel in right connecting pin and being open on the outside of right trunnion, wherein further include that open side exists First channel on the outside of left trunnion.

4. one-piece crankshaft according to claim 1, which is characterized in that centered on crank, trunnion is outside, in mistake It crosses and is formed with arc-shaped transitional surface on the outside of section.

5. one-piece crankshaft according to claim 1, which is characterized in that be coaxially fixedly installed on the crank Gear ring.

6. one-piece crankshaft according to claim 5, which is characterized in that the gear ring is matched with the crank interference It closes.

7. a kind of pulsed plunger pump, which is characterized in that including gear-box, connecting rod, as claimed in any one of claims 1 to 6 one Body formula bent axle and drive shaft, the bent axle is driven to be can be rotatably set in gear-box, the drive shaft with it is described Bent axle coaxial arrangement and be sequentially connected, the connecting rod and crank-pin connecting pin are two split and bolted semicircles.

8. pulsed plunger pump as claimed in claim 7, which is characterized in that the trunnion is rotatably set by bearing shell It sets between gear-box.