CN203560050U

CN203560050U - Five-plunger high-pressure pump power end capable of reducing torque of crankshaft

Info

Publication number: CN203560050U
Application number: CN201320733676.2U
Authority: CN
Inventors: 朱金牛; 罗玉川
Original assignee: TIANJIN TONG JIE HIGH PRESSURE PUMP CO Ltd
Current assignee: TIANJIN TONG JIE HIGH PRESSURE PUMP CO Ltd
Priority date: 2013-11-19
Filing date: 2013-11-19
Publication date: 2014-04-23
Anticipated expiration: 2023-11-19

Abstract

Provided is a five-plunger high-pressure pump power end capable of reducing torque of a crankshaft. The power end comprises a crankcase, the crankshaft, connecting rods and crossheads, wherein the crankshaft is arranged in the crankcase, five eccentric parts are formed in the outer circumferential surface in a spaced mode, a plurality of supporting parts are arranged between every two adjacent eccentric parts, the front end of each connecting rod is connected to the corresponding eccentric part of the crankshaft, the rear end of each connecting rod is connected with the front end of the corresponding crosshead, two bearing bushes are arranged between the lower portions of two supporting parts in the middle and the bottom surface of the crankcase, each bearing block is coaxially provided with a rolling bearing, and the inside of a center hole of each rolling bearing is provided with the corresponding supporting part. According to the five-plunger high-pressure pump power end, the rolling bearings are arranged between the bearing bushes and the supporting parts on the crankshaft, sliding friction between the supporting parts and the bearing bushes is changed to rolling friction between the supporting parts and the rolling bearings, and therefore the torque of the crankshaft can be greatly reduced. Thus, carrying capacity is improved, damage is not prone to occurring, and the service life of the whole power end can be prolonged.

Description

A kind of five piston high-pressure pump power ends that can reduce bent axle moment of torsion

Technical field

The utility model belongs to hydraulic machinery technical field, particularly relates to a kind of five piston high-pressure pump power ends that can reduce bent axle moment of torsion.

Background technique

Plunger pump is an important device of hydraulic system, it relies on plunger to-and-fro motion in cylinder body, make the volume of pressurization working lumen change to realize suction medium, compressed media, the advantage such as have that rated pressure is high, the high and Flow-rate adjustment of compact structure, efficiency is convenient, be widely used in the occasion that high pressure, large flow and flow need to regulate, in hydraulic press, engineering machinery, oil field and boats and ships.Wherein five piston high-pressure pumps are one of commonly using.Fig. 1 is power end substantially horizontal structure sectional view on a kind of five piston high-pressure pumps of prior art.As shown in Figure 1, this five piston high-pressure pumps are mainly comprised of power end and fluid end two-part, and wherein power end is for passing to fluid end by the energy of prime mover, and fluid end is for being converted to mechanical energy fluid pressure energy; Power end comprises crankcase 1, bent axle 2, five connecting rods 3 and five crossheads 4; Fluid end mainly comprises five plungers, five cylinder bodies, bracket, pump head, five liquid feed valves, five liquid discharging valves and five supported springs; Described bent axle 2 is horizontally set on the inside of crankcase 1, and one end is connected with the motor output shaft that is positioned at crankcase 1 outside, and on outer peripheral surface, standoff distance is formed with five eccentric parts, and the position between adjacent two eccentric parts is multiple supporting portions 5; The front end of every cover connecting rod 3 is connected on an eccentric part of bent axle 2, and rear end is connected with the front end of a crosshead 4; Multiple cylinder bodies are arranged side by side in the bracket inside that is connected in crankcase rear end; The inside of each cylinder body is provided with a plunger in the mode of sliding, and the rear end of the front end of every plunger and a crosshead 4 joins; The middle part of pump head is formed with cavity along the vertical direction, and the front end position, middle part of cavity is connected with each cylinder interior by multiple pass liquid holes, and cavity bottom is provided with the inlet opening being connected with feed liquor pipeline, and upper end is provided with the outage being connected with drain line; Liquid feed valve is arranged on the position between pass liquid hole and inlet opening in cavity; Liquid discharging valve is arranged on the position between pass liquid hole and outage in cavity; Supported spring is between liquid feed valve and liquid discharging valve.

Now the plunger pump working principle of this prior art is described below: when needs compressed liquid, under the effect of motor, bent axle 2 on power end will produce rotation, thereby drive all connecting rods 3, crosshead 4 horizontal reciprocating movements, and crosshead 4 drives plunger to move back and forth in cylinder body again.When plunger is made drawback movement, the volume of cylinder body increases gradually, has formed parital vacuum, and now liquid discharging valve is in closed state, under the effect of pressure reduction, low pressure liquid, by the inside of the feed liquor pipeline inflow pump head upper plenum by being connected with inlet opening, then upwards backs down liquid feed valve, then by pass liquid hole, flows into the inside of cylinder body, when plunger continues to move to backhaul limit position, imbibition process stops, and at this moment, cylinder interior imbibition is maximum.When plunger is done process motion, the volume in cylinder body reduces gradually, and liquid is squeezed, pressure increases, and under the effect of hydraulic pressure, liquid feed valve is closed, liquid discharging valve is opened, at this moment the highly pressurised liquid of cylinder interior will discharge to receiving vessel from pass liquid hole, cavity top and outage, when plunger reaches process limit position, and the volume minimum of cylinder interior, discharge opeing process is complete, due to constantly to-and-fro motion of plunger, liquid sucking-discharging process just constantly hockets, so highly pressurised liquid is constantly exported.

But, there is following point in five piston high-pressure pumps of this prior art: because bent axle 2 on the high-pressure service pump of this structure is longer, in order to prevent its bending deflection, conventionally between 5 belows, two supporting portions at position and crankcase 1 bottom surface, two bearing shells 6 are set therebetween, although this form structure compactness, cost is low, but because this supporting portion 5 is directly to contact with bearing shell 6, therefore in high-pressure service pump running, will produce sliding friction between the two, because the frictional force of this supporting way is larger, therefore can make bent axle 2 produce larger moment of torsion, cause bearing capacity low, and be prone to damage, thereby greatly shortened the working life of high-pressure service pump.

Summary of the invention

In order to address the above problem, the purpose of this utility model is to provide a kind of five piston high-pressure pump power ends that can reduce bent axle moment of torsion.

In order to achieve the above object, the five piston high-pressure pump power ends that can reduce bent axle moment of torsion that the utility model provides comprise crankcase, bent axle, five connecting rods and five crossheads; Wherein bent axle is horizontally set on the inside of crankcase, and one end is connected with the motor output shaft that is positioned at crankcase outside, and on outer peripheral surface, standoff distance is formed with five eccentric parts, and the position between adjacent two eccentric parts is multiple supporting portions; The front end of every cover connecting rod is connected on an eccentric part of bent axle, and rear end is connected with the front end of a crosshead, and is provided with two bearing shells between the below, two supporting portions of intermediate portion and crankcase bottom surface; A bearing support is installed on every described bearing shell, on bearing support, is coaxially installed with a rolling bearing, a supporting portion is set in the center hole of each rolling bearing.

Described bearing support and rolling bearing outside are provided with the check ring for anticreep.

The five piston high-pressure pump power ends that can reduce bent axle moment of torsion that the utility model provides are between supporting portion, rolling bearing to be set on bearing shell and bent axle thereon, thereby make the sliding friction between the supporting portion of prior art and bearing shell into rolling friction between supporting portion and rolling bearing, so just can greatly reduce the moment of torsion of bent axle, therefore improved bearing capacity, and be not prone to damage, thereby can improve the working life of whole product.

Accompanying drawing explanation

Fig. 1 is power end substantially horizontal structure sectional view on a kind of five piston high-pressure pumps of prior art.

Fluid end substantially horizontal structure sectional view on the reciprocal high-pressure service pump of plunger that Fig. 2 provides for the utility model.

Embodiment

The five piston high-pressure pump power ends that can reduce bent axle moment of torsion that the utility model provided below in conjunction with the drawings and specific embodiments are elaborated.The parts identical with prior art adopt identical label, and omit the explanation that it is carried out.

As shown in Figure 2, the five piston high-pressure pump power ends that can reduce bent axle moment of torsion that the utility model provides comprise crankcase 1, bent axle 2, five connecting rods 3 and five crossheads 4; Wherein bent axle 2 is horizontally set on the inside of crankcase 1, and one end is connected with the motor output shaft that is positioned at crankcase 1 outside, and on outer peripheral surface, standoff distance is formed with five eccentric parts, and the position between adjacent two eccentric parts is multiple supporting portions 5; The front end of every cover connecting rod 3 is connected on an eccentric part of bent axle 2, and rear end is connected with the front end of a crosshead 4, and is provided with two bearing shells 6 between 5 belows, two supporting portions of intermediate portion and crankcase 1 bottom surface; A bearing support 7 is installed on described every bearing shell 6, on bearing support 7, is coaxially installed with a rolling bearing 8, a supporting portion 5 is set in the center hole of each rolling bearing 8.

Described bearing support 7 is provided with the check ring for anticreep with rolling bearing 8 outsides.

The same prior art of five piston high-pressure pump working principles that can reduce bent axle moment of torsion that the utility model provides, therefore no longer repeats here.

Claims

1. five piston high-pressure pump power ends of bent axle moment of torsion be can reduce, crankcase (1), bent axle (2), five connecting rods (3) and five crossheads (4) comprised; Wherein bent axle (2) is horizontally set on the inside of crankcase (1), one end motor output shaft outside with being positioned at crankcase (1) is connected, and standoff distance is formed with five eccentric parts on outer peripheral surface, the position between adjacent two eccentric parts is multiple supporting portions (5); The front end of every cover connecting rod (3) is connected on an eccentric part of bent axle (2), and rear end is connected with the front end of a crosshead (4), and is provided with two bearing shells (6) between below, two supporting portions (5) of intermediate portion and crankcase (1) bottom surface; It is characterized in that: on described every bearing shell (6), a bearing support (7) is installed, on bearing support (7), is coaxially installed with a rolling bearing (8), a supporting portion (5) is set in the center hole of each rolling bearing (8).

2. the five piston high-pressure pump power ends that can reduce bent axle moment of torsion according to claim 1, is characterized in that: described bearing support (7) is provided with the check ring for anticreep with rolling bearing (8) outside.