mud pump crankshaft made in china

We manufacture and offer power end parts of triplex mud pumps for our clients all over the world. Power End includes frame, pinion shaft, crankshaft, crosshead and extension rod.

2.Frame：The frame is made of welded steel plate and by stress relief treatment to obtain good rigidity and high strength. Ribbed plates are used to strengthen the place where the crankshaft bearing is fitted. The frame is furnished with the necessary oil basin and oil way system for cooling and lubricating purpose.

The crankshaft is made of cast alloy steel and is furnished with big geared ring, connecting rod and bearing. The tooth form of the big-geared ring is herringbone gear. The gear bore and the crankshaft surface is interference fitted and they are both fastened with bolts and lock nuts. The big end of the connecting rod is mounted on three eccentric straps of the crankshaft through single row short cylindrical roller bearings and the small end on the crosshead pin through double row long cylindrical roller bearing. Double row radial spherical roller bearings are mounted at both ends of the crankshaft.

The crosshead and crosshead guide are made of ASTM A48-83 meehanite cast iron featured by good abrasion resistance and long service life. Upper and lower guides are used on F-800 and F-1000 mud pumps, so that the concentricity can be adjusted by adding shims beneath the lower guide. F-500 mud pump is the cylindrical structure. Bolted flange is used at the connection between the crosshead and the extension rod. The rigid connection ensures the concentricity of the crosshead and the extension rod. The coupling is used for connecting the extension rod to the piston rod. The lightweight coupling enables the extension rod and the piston rod to connect to each other easily and reliably.

RMP is the key component in oil well engineering. The RMP consist of two main sub-assemblies, the fluid end and the power end. Fig. 1(a) is the structure of RMP. It is made up of big herringbone gear, crankshaft, connecting rod, crosshead, shell, intermediate rod and the fluid end et al. Fig. 1(b) is the fluid end. Fig. 1(c) is the crankshaft. The power end is a typical crank-link mechanism. The power is passed to connecting mechanism through big herringbone gear. The crankshaft is driven by big herringbone gear. Then rotary motion is transformed into line motion by the crankshaft. The liquid flow generated by this reciprocating motion is directed from the pump inlet (suction) to the pump outlet (discharge) by the selective operation of self-acting check valves located at the inlet and outlet of each displacement element. Suction and discharge power of the fluid end for oil well liquid and this makes oil well liquid circulation. The process is repeated continuously. In Table 1 are the basic parameters of RMP.

Fig. 1.The structure of RMP: 1. RMP power end, 1-1. Big herringbone gear, 1-2. Crankshaft, 1-3. Connecting rod, 1-4. Crosshead, 1-5. Shell, 1-6. Intermediate rod; 2. The fluid end, 2-1. Suction tube, 2-2. Discharge tube

The crankshaft experiences complex loading due to the motion of the connecting rod, which transforms loads to the crankshaft. The main objective of the computation model is to determine the accurate magnitude and direction of the loads that act on the crankshaft over the entire working cycle, which are then used in the FEM. Fig. 2(a) is computation model of slider-crank mechanism with a single degree of freedom. Crankshaft angles α= 0°~180° and α= 180°~360° are defined as suction process and discharge process respectively.

where a, b, c, d, e and f are distances. G0 is the weight of crankshaft excluding three eccentric wheels. G is the weight of the eccentric wheel and connecting rod. Ir is the centrifugal force of G. γ is the angle of section III-III and acting plate of Pt. The positive value of calculation results indicates the same direction with coordinate axes. Negative value indicates opposite direction.

Usually the crankshaft with large section change will cause large stress. So three sections I-I, II-II and III-III are selected as dangerous sections for stress analysis.

The load computation of entire crankshaft model is based on 3 pistons working ability. According to the entire RMP working parameters, the loads of different parts can be gotten at different positions. Through the loads of crosshead, connecting rod, piston rod et al. and inertia force analysis, the final crankshaft load results were obtained. Fig. 3a), b) and c) show the forces variation of piston rod, connecting rod and crank.

As can be seen in Fig. 3a), F is very small from 0° to 180° because there is the inhalation process of piston. As degree increases it is very big and declines during the range of 180° to 360°. Q has the same discipline with piston rod. R and T are very small from 0° to 180°. R changes from maximum pull to maximum pressure in the range of 180° to 360° with cosine change. T first decreases, then increases according to sine change. For the three crank throws, the forces are of the same change, but they have different phases. Fig. 4(a) is tangential force variation of big herringbone gear. Pt repeats the same cycle every 60°. The maximum Pt is about 1.8×105 N. The minimum Pt is about 1.4×105 N. Fig. 4(b) is counterforces variation of A and B supports. When α1= 30°, the maximum NB of B supporting is about 7.2×105 N. When α1= 245°, the maximum NA of A supporting is about 7.3×105 N. Fig. 4(c) is torque of crankshaft. Fig. 4d) is the total bending moment variation of crankshaft for three dangerous sections. The loads results are the base of FEM analysis.

Triplex: This mud pump is used for drilling applications needing high pump pressure. This model works by decreasing the working fluid volume being discharged to generate pressure for producing the flow. There are three pistons in the triplex pump, with the middle piston generating more pressure on the crankshaft. High piston load can lead to excessive pressure and crankshaft failure if the components are not properly sourced.

Quintuplex:Quintuplex mud pump is perfect for pumping fluid at the time of drilling operations. It works as a continuous duty return piston. This is used in terms of its external bearings to provide crankshaft support to ensure the proper functioning of the sheaves.

Duplex: These mud pumps ensure that the mud circulation reaches the well"s bottom from the mud cleaning system. Duplex pumps have binocular floating seals as well as safety valves.

Saigao offers high-quality OEM mud pump spares, consumables, expendables and spare parts. Our mud pump parts are made with the highest standards of quality, offering competitive pricing and exceptional durability.

Our range of products include Triplex Mud Pump Crankshafts, Mud Pumps Crankshafts, Two Stroke Pump Crankshaft, High Pressure Triplex Pump Crankshaft, Heavy Duty Crank Shaft and Reciprocating Pump Crankshafs.

Established in the year 2013 in Maharashtra, India. We Omega Crankshafts are Partnership based firm, involved as theManufacturer of Compressor Crankshaft, Press Crankshaft, Industrial Crankshaft, Forged Crankshaft and much more. All our products are getting widely acclaimed among the large clientele for their exclusive designs, superior quality, and reliability. Apart from this, our ability to maintain timelines as well as quality in the assortment, providing cost-effective solutions and assurance to make timely shipment of the orders placed by customers have assisted us positioning our name in the list of top-notch companies of the industry.