CN213451292U

CN213451292U - Plunger pump crankshaft mechanism

Info

Publication number: CN213451292U
Application number: CN202022549232.6U
Authority: CN
Inventors: 许杰; 孙立源; 张渤通
Original assignee: Tianjin Juneng High Pressure Pump Co ltd
Current assignee: Tianjin Juneng High Pressure Pump Co ltd
Priority date: 2020-11-06
Filing date: 2020-11-06
Publication date: 2021-06-15
Anticipated expiration: 2030-11-06

Abstract

The utility model relates to a plunger pump technical field especially relates to a plunger pump crankshaft mechanism, it includes integrated into one piece's bent axle body, the bent axle body is including the preceding main journal that sets up with one heart, back main journal, a plurality of cranks between eccentric locating preceding main journal and the back main journal, the crank pin and support the neck, the crank cross-section is oval structure, the crank pin with support the neck spaced locate between two adjacent cranks, support the central line of neck and the coincidence of the central line of preceding main journal and back main journal, the central line and the articulate central line of the skew main journal of central line of crank pin. The device provided by the utility model simple structure, processing is convenient and bearing capacity is strong.

Description

Plunger pump crankshaft mechanism

Technical Field

The utility model relates to a plunger pump technical field especially relates to a plunger pump crankshaft mechanism.

Background

In a reciprocating pump, a crankshaft is one of important components for converting the rotary motion of a prime mover into the reciprocating motion of a plunger, and when the reciprocating pump works, the crankshaft is subjected to periodic alternating loads to generate alternating torsional stress and bending pressure, so the crankshaft is the most important stressed component in a crank-link mechanism. The stress of the crankshaft is complex during operation, except that the force acting on the plunger is constant, other factors such as external force of a prime mover driving torque support, transverse and longitudinal torsion among connecting pieces, vibration inertia moment and the like all change along with the change of a rotating angle, in addition, the service life of the crankshaft is influenced by the deformation of a machine body, the processing of different axiality, additional load caused by the abrasion of a shaft neck and the like in use, stress concentration at the joint of a crank and a crank pin and the like

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a plunger pump bent axle mechanism that simple structure, processing convenience and bearing capacity are strong is provided.

The utility model discloses a realize through following technical scheme:

the utility model provides a plunger pump crankshaft mechanism, its includes integrated into one piece's bent axle body, the bent axle body is including preceding main journal, back main journal, eccentric a plurality of cranks, crank pin and the support neck of locating between preceding main journal and the back main journal that set up with one heart, the crank cross-section is oval structure, between the adjacent two cranks of locating of crank pin and support neck interval, the central line of support neck and the coincidence of the central line of preceding main journal and back main journal, the central line of the central line skew main journal of crank pin and articulate central line.

Further, the bent axle body includes eccentric crank and a plurality of eccentric crank of going up down, and a plurality of eccentric crank down are close to preceding main shaft neck side, and a plurality of eccentric crank of going up are close to back main shaft neck side, go up to be equipped with eccentric crank pin between two eccentric crank, are equipped with down eccentric crank pin between two eccentric crank down, and the direction of skew is different between every crank pin.

Preferably, the crank is provided with a smooth chamfer on the end face contacting with the support neck and the crank pin.

Furthermore, the two ends of the supporting neck are provided with clamping grooves.

Furthermore, a key groove is formed in the front main journal.

Furthermore, a front shaft shoulder is arranged between the front main shaft neck and the crank, and a rear shaft shoulder is arranged between the rear main shaft neck and the crank.

Beneficial effects of the utility model

The utility model discloses a pair of plunger pump bent axle mechanism has following advantage:

1. simple structure and convenient processing.

2. The number of the supporting necks is increased, so that the structure is more stable and the strength is higher.

3. The cross-sectional shape of the crank is changed, so that the overlapping area among the crank, the supporting neck and the crank pin is increased, the bearing capacity of the crankshaft is improved, and the service life of the crankshaft is prolonged.

Drawings

FIG. 1 is a schematic view of the structure of the present invention;

FIG. 2 is a schematic sectional view A-A;

in the figure, 1, a rear main journal, 2, a crank pin, 3, an upper eccentric crank, 4, a support journal, 5, a clamping groove, 6, a rear shaft shoulder, 7, a lower eccentric crank, 8, a front main journal, 9, a key groove, 10, a front shaft shoulder and 11, a lower eccentric crank pin are arranged.

Detailed Description

The utility model provides a plunger pump crankshaft mechanism, its includes integrated into one piece's bent axle body, the bent axle body is including preceding main journal 8, back main journal 1, eccentric a plurality of cranks, crank pin 2 and the support neck 4 of locating between preceding main journal and the back main journal that set up with one heart, the crank cross-section is oval structure, between two adjacent cranks of locating of crank pin and support neck interval, the central line of support neck and the central line coincidence of preceding main journal and back main journal, the central line of the central line skew main journal of crank pin and articulate central line.

Further, the bent axle body includes eccentric crank 7 under a plurality of and a plurality of eccentric crank 3 of going up, and a plurality of eccentric crank are close to preceding main journal side down, and a plurality of eccentric crank are close to back main journal side on, go up to be equipped with eccentric crank pin 2 between the eccentric crank on two, be equipped with eccentric crank pin 11 down between the two eccentric crank down, and the direction of skew is different between every crank pin, is favorable to improving the holistic atress of bent axle, and realizes a plurality of plunger asynchronous reciprocating motion.

Optimally, smooth chamfers are arranged on the end faces, in contact with the supporting neck and the crank pin, of the crank, stress concentration can be reduced, and the bearing capacity of the crank is further improved.

Furthermore, the both ends of supporting the neck are equipped with draw-in groove 5, and the bearing suit is fixed with supporting the neck on supporting the neck and through the jump ring in draw-in groove department, and the bearing is connected with the frame and forms the support to the bent axle, and simple to operate is swift, and the structure is firm reliable.

Furthermore, a key groove 9 is formed in the front main journal, and the front main journal is conveniently connected with a motor main shaft.

Further, a front shaft shoulder 10 is arranged between the front main shaft neck and the crank, so that the front main shaft neck is convenient to limit when being connected with the motor shaft, and a rear shaft shoulder 6 is arranged between the rear main shaft neck and the crank, so that the rear main shaft neck is convenient to limit when being connected with the end cover.

The utility model discloses a pair of plunger pump bent axle mechanism, preceding main shaft neck pass through the cooperation of key and are connected for the bent axle provides power with the motor shaft, drive the bent axle rotation to a plurality of plunger reciprocating motion of eccentric action drive plunger pump through the crank pin.

Because the crank cross-section is oval structure, between the crank pin and the spaced adjacent two cranks of locating of support neck, the central line of support neck and the coincidence of the central line of preceding main journal and back main journal, the central line of crank pin skew main journal's central line and articulate central line have increased the quantity of support neck, make the structure more firm, and intensity is higher. Meanwhile, the cross section shape of the crank is changed, so that the overlapping area among the crank, the supporting neck and the crank pin is increased, the bearing capacity of the crankshaft is improved, and the service life of the crankshaft is prolonged.

And because bent axle body integrated into one piece, the crank is oval structure, and two circular arcs of crank are together turned when processing the main journal, and two circular arcs can go up eccentric frock and turn out along with when processing the crank pin in addition, and processing is convenient, labour saving and time saving to overall structure bearing capacity is strong.

To sum up, the utility model discloses a plunger pump bent axle mechanism who protects, simple structure, processing is convenient and bearing capacity is strong.

Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a plunger pump crankshaft mechanism, its characterized in that, includes integrated into one piece's bent axle body, the bent axle body is including preceding main journal, back main journal, eccentric a plurality of cranks, crank pin and the support neck of locating between preceding main journal and the back main journal that set up with one heart, the crank cross-section is oval structure, between two adjacent cranks of locating of crank pin and support neck interval, the central line of support neck and the coincidence of the central line of preceding main journal and back main journal, the central line of the central line skew main journal of crank pin and articulate central line.

2. The plunger pump crankshaft mechanism of claim 1, wherein the crankshaft body comprises a plurality of lower eccentric cranks and a plurality of upper eccentric cranks, and the plurality of lower eccentric cranks are close to the front main journal side, the plurality of upper eccentric cranks are close to the rear main journal side, an upper eccentric crank pin is arranged between the two upper eccentric cranks, a lower eccentric crank pin is arranged between the two lower eccentric cranks, and the direction of offset between each crank pin is different.

3. The plunger pump crankshaft mechanism of claim 1, wherein the crank is rounded on the end surface contacting the support neck and the crank pin.

4. The plunger pump crankshaft mechanism of claim 1, wherein the support neck is provided with a snap groove at both ends.

5. The plunger pump crankshaft mechanism of claim 1, wherein said front main journal is keyed.

6. The plunger pump crankshaft mechanism of claim 1, wherein a front shoulder is disposed between the front main journal and the crank, and a rear shoulder is disposed between the rear main journal and the crank.