Power End Components
Best-all Petroleum Machinery Co., Ltd.
Since 2010, Best-all Petroleum Machinery Co., Ltd. has been supplying high quality products to the oil well drilling industry. Our core focus is to provide performance enhancing mud pump parts and solutions that meet the oil well drilling standards. We have developed, tested and enhanced mud pump components that decrease downtime, improve safety and perform in the toughest drilling environments.
Why Choose US
Our Factory
Since 2010, Best-all Petroleum Machinery Co., Ltd. has been supplying high quality products to the oil well drilling industry. Our core focus is to provide performance enhancing mud pump parts and solutions that meet the oil well drilling standards. We have developed, tested and enhanced mud pump components that decrease downtime, improve safety and perform in the toughest drilling environments.
Our Product
Fluid end expendables: liners, pistons, valves & seats, extension rod, piston rod, clamps
Fluid end modules & accessories
Refurbishment & overhaul parts
Power end components
Pulsation dampener & Discharge Strainer
Discharge & Suction Manifold
Production Equipment
Best-all Petroleum Machinery Co., Ltd. Funishes all facilities including casting, forging, heat-treating, milling and CNC lather.
Production Market
United States, Canada, Mexico, Colombia, Brazil, Middle East, India, Germany, Netherlands, Great Britain, Poland, Russia.
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Crankshaft and Connecting RodBest-all supplies powered components including Crankshaft assemblies, crankshaft-gearingAdd to Inquiry -
Bull Gear and Pinion ShaftBest-all supplies bull gear and pinion shaft that matches OEM mud pumps.Add to Inquiry -
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Crosshead, Slide and Crosshead PinBest-all supplies cross head, slide and crosshead pin that matches OEM mud pumps.Add to Inquiry -
Mud Pump BearingBest-all supplies mud pump bearings 100% interchangeable with SKF, Timken and other well-knowAdd to Inquiry
- Tel: +86-533-8171332
- Fax: +86-533-8171332
- Sales01@bp-mudpump.com
- Add: Room 702, Block B, 105 Liuquan Road, Hi-tech Zone, Zibo, China
What is Crankshaft
A crankshaft is a mechanical component used in a piston engine to convert the reciprocating motion into rotational motion. The crankshaft is a rotating shaft containing one or more crankpins, that are driven by the pistons via the connecting rods. The crankpins are also called rod bearing journals, and they rotate within the "big end" of the connecting rods. Most modern crankshafts are located in the engine block. They are made from steel or cast iron, using either a forging, casting or machining process.
Advantages of Crankshaft and Connecting Rod
Strength and durability
Conrods are subjected to significant forces and stresses as the pistons move up and down within the cylinders. High-quality conrods are designed to withstand these forces and ensure long-term durability of the engine.
Weight reduction
Modern conrods are often designed using advanced materials like forged steel, titanium, or aluminum alloys. These materials are chosen for their strength-to-weight ratio, which helps reduce the overall weight of the engine without compromising strength or performance.
Improved engine performance
Well-designed conrods contribute to better engine performance by facilitating smoother piston motion, reducing friction, and optimizing combustion efficiency. This can lead to improved power output, fuel efficiency, and reduced emissions.
Reduced vibrations
The balanced design of conrods helps in minimising engine vibrations. This is crucial for driver comfort and overall vehicle performance.
Enhanced engine revving
Lightweight conrods contribute to the engine's ability to rev higher and more freely. This is particularly important in high-performance engines where the ability to quickly change rpms can impact acceleration and top speed.
Engine balancing
Properly designed conrods contribute to the overall balancing of the engine. This helps minimise vibrations and extends the life of various engine components.
Engine downsizing and turbocharging
In modern engine design, downsizing (reducing engine displacement) is often coupled with turbocharging to maintain power output while improving fuel efficiency. Well-designed conrods contribute to the reliability and performance of smaller, turbocharged engines.
Reduced friction
Conrods with optimised designs and coatings can reduce friction between the rod and the crankshaft journal. This reduction in friction helps enhance engine efficiency and reduces wear on components.
Main journal bearings
The main journal bearings serve as the central axis of the crankshaft, playing a fundamental role in its structure and function. One end of the crankshaft is firmly connected to the flywheel flange, while the other end is linked with a pulley shaft. This connection establishes the core alignment of the crankshaft within the engine.
Counterweights
Counterweights are critical components of the crankshaft, ensuring smooth operation. They are attached to the crankshaft using rod-bearing journals, forming pairs of counterweights. Each pair is strategically connected to the main bearing journal, creating a sequence of counterweights. The counterweights play a key role in balancing the crankshaft's movement, contributing to the overall stability of the engine. As the piston moves, the counterweights' shifting potential energy helps maintain smooth operation.
Flywheel flange
The flywheel of a vehicle is securely fastened to the crankshaft via a component known as the flywheel flange. This connection is vital because the flywheel is a substantial mechanical device that rotates at high rpm. The flywheel flange, located at one end of the crankshaft, is meticulously designed to rigidly hold the flywheel in place, ensuring its stability during operation.
Pulley end
At the opposite end of the crankshaft, the pulley end is attached to the engine, and it can also connect to the gearbox, serving as a critical link in power transmission within the vehicle's system.
Balance weight
Balance weights are additional elements within the counterweights to enhance the stability and balance of the crankshaft, contributing to the engine's overall performance.
Rod bearing journals
Rod bearing journals serve as connectors between the pistons and the crankshaft. These journals play a vital role in the engine's operation, as they facilitate the attachment of pistons to the crankshaft using pins.
Oil passage
The oil passage is a conduit that links the main journal bearing to the rod journal bearing. This passage is essential for the lubrication of the crankshaft, as it enables the flow of oil from the main journal bearing to the rod journal bearing, ensuring the smooth and friction-free operation of the engine's moving parts.
How Is a Crankshaft Made
The construction of crankshafts often relies on cast iron because of its excellent durability and ability to withstand the demand of engine operation. In certain cases, crankshafts are also manufactured using forged steel to withstand the heavy load involved.
Cast iron crankshafts are created through a casting process, while forged one involves heating a block of steel until it gets red hot. Subsequently, the forged steel is kept under high pressure to shape it in any desired form.
The manufacturing process of crankshafts also includes surface hardening and heat treatment techniques like carburising, nitriding etc., in order to enhance durability. Lastly, the choice of materials used for crankshaft construction depends on various factors such as operating conditions, the engine's power output, and more.
Materials Used for Making Crankshaft
Crankshafts are generally made up of steel due to their high strength and hardness. The fatigue strength of steel is also very high when compared to other materials of the same cost.
Some of the materials used for making crankshafts are.
Manganese-molybdenum steel
Crankshafts manufactured using manganese-molybdenum steels are done using the forging process. The crankshafts are cheap and are used for moderate-duty petrol engines. It consists of 1.5% manganese, 0.3% molybdenum, 0.38% carbon, and 97.82% iron. The brinell hardness number of manganese-molybdenum steel is around 250 bhn.
Chromium-molybdenum steel
This type of steel is used for medium and heavy-duty petrol and diesel prices. It consists of 1.2%chromium, 0.4% molybdenum, 0.3% carbon and the rest is iron. Brinell hardness number for chromium-molybdenum steel is about 280 bhn.
Nickel-chromium-molybdenum steel
The fatigue strength of these steels is very high and is used in diesel engines. It consists of 2.5% of nickel, 0.31% carbon, 0.65% chromium, 0.5% molybdenum and the remaining is iron. The brinell hardness number for this steel is 300 bhn.
Nodular cast iron
Nodular cast iron is a grey cast iron that has graphite nodules in perlite medium. These are also known as ductile cast iron due to their high ductility. The carbon content and silicon content are around 3-4% and 1.8-2.8% respectively.
(1) Inspect the Mud Pump for any damage or rust caused by improper storage. Ensure all threaded connections are properly tightened.
(2) Check the plunger for smooth movement.
(3) Flush and 100% ID check all tubing with a gauge, clearing any debris inside rods and couplings.
(4) Carefully review and strictly follow the operation manual.
Pump Installation Process:
(1) Based on the design, lower the required length of tailpipe into the well.
(2) Lower the pump hanger (confirm orientation) with the tubing to the planned setting depth.
(3) Based on the pump setting depth, lower the required tubing joints and land at the wellhead. A pressure test sub can be connected at the tubing tail to pressure test for leaks before proceeding.
(4) When lowering the pump, support it beneath the top sub using an inverted Muleshoe. slowing as the hanger nears and marking the rods when movement stops.
(5) Connect polished rods, pull up 3m, then lower to latch and lock the pump into the hanger.
(6) Adjust over stroke stop, and install fluid overflow preventer.
(7) Pressure test per manual to confirm Mud Pump is properly locked and evaluate efficiency.
What is Mud Pump Bearing
A bearing is a device to permit fixed direction motion between two parts, typically rotation or linear movement. Bearings may be broadly grouped by the way they work. The most common of the many types are plain bearings and rolling-element bearings. The two main types of rolling-element bearings are ball bearings and roller bearings. In ball bearings, the rolling elements are spherical balls. In roller bearings, the rolling elements are cylindrical, taper or spherical rollers.
After the drilling machine is installed at the drilling site, check whether the prime mover and the main shaft of the pump are on the same axis. If they are not, adjust them correctly.
The inlet and outlet pipelines of the mud pump should have load-bearing support to avoid the pipeline weight acting on the pump body. Without high-pressure clear water protection, the packing chamber components will quickly wear out.
When the mud pump is working, high-pressure clear water must be injected into the packing chamber to protect the shaft seal components. The high-pressure clear water pump should not be turned off during normal operation.
The suction head in the performance table of the mud pump refers to the pump's cavitation resistance under normal temperature and clear water conditions. When pumping sludge and sand, the inlet water pressure of the pump should be as positive as possible.
When replacing vulnerable parts such as impellers and liners, adjust the clearance between the impeller and liner. The axial clearance between the impeller and the liner has a great influence on the performance and service life of the pump.
Please inject lubricating grease into the bearing part of the mud pump in time. The water pressure should be greater than the working pressure of the mud pump. The installation of the pipeline should extend outward from the pump inlet and outlet flanges and the supporting position should be determined immediately.
The pump vibrates abnormally during work. When the noise and bearing temperature rise too high, stop the pump immediately for inspection. When mud contains a large amount of solid particles, the flow and head of the pump will also be affected, and the condition of the medium should be considered when selecting the pump.
Why Does the Bearing of the Mud Pump Heat Up
The two ends of the bearing heat up, and noise and vibration occur
● Water enters the bearing: The reason for the water entering the bearing is that the environment in which the mud pump is placed is relatively humid, or the water seal leaks seriously, and water enters the bearing. The solution at this time is to replace the bearing. If it is severe, the entire bearing assembly needs to be replaced.
● The lubrication oil is too much or too little: Excess lubrication oil affects heat dissipation, and too little does not provide good lubrication, so excess or insufficient lubrication oil can cause bearing heating. The solution at this time is to add lubrication oil to the bearing correctly according to the instructions.
● The bearings are not properly assembled: When assembling the bearings, if the gap between the bearings is not adjusted properly, the friction between the bearings will cause the bearings to heat up. Adjusting the gap between the bearings at this time can solve the problem.
The driving end heats up
The belt is tightened too much; adjusting the looseness of the belt is appropriate when the belt can be depressed by one finger in the middle.
The bearings have abnormal noise and vibration
● Foreign matter enters the bearing : If the water seal leaks severely, the slurry enters the bearing during the splash process, and the friction between the foreign objects in the bearing and the slurry will cause heating and vibration of the bearings. At this time, the bearing needs to be removed and cleaned. If the bearing has worn severely, the bearing needs to be replaced.
The motor shaft and the pump shaft are not centered, not parallel, or the shaft is bent : At this point, the motor shaft and the mud pump shaft need to be reconnected to ensure that they are centered and parallel.
● The impeller loses balance : After the impeller is used for a period of time, it will have normal wear and tear, which will cause the impeller to be unbalanced. The impeller drives the shaft, which in turn drives the bearing to vibrate and heat up. At this time, the impeller needs to be replaced.
The bearings heat up, and the shaft moves
This is caused by bearing damage, and the bearing or bearing assembly needs to be replaced.
Seven Tips for Proper Bearing Maintenance
Handle with care
Bearings are delicate enough to get damaged quickly. As such, it is very important that they are stored horizontally in a clean and dry environment with their packaging intact. Do not expose them to any airborne contaminants, as even a tiny speck of dirt can cause premature failure. Never hammer or pound them, or apply a direct force on it or its outer ring, which can cause damage to the rolling elements, resulting in misalignment. The most important thing to remember is to never remove bearings from their packaging until ready for use.
Check the bearing housing and shaft
Whenever a bearing is used for mounting, it is crucial that the housing and shaft are inspected for any sort of physical condition or damage. Always use a soft cloth to wipe the surfaces clean and make sure any nicks and burrs are removed.
Mount the bearings correctly
The method used to mount the bearings depends on the type of bearing. For example, bearings with cylindrical bores are generally mounted through a press fit method. Bearings with tapered bores can be mounted directly on tapered or cylindrical shafts with the use of tapered sleeves. However, pressure should be applied only with a press fit because without it the raceways can become damaged.
Avoid preheating or overheating
The maximum heating allowed on the bearings depends on the heat treatment of the material. If they are heated above the permitted limit, they can permanently deform or soften the bearing steel, lowering load carrying capacity and resulting in a failure. Always heat the bearings using induction heaters, and never with an open flame.
Always use the proper tools
Specialized tools like bearing pullers, bearing fitting tool kits, oil injector kits, hydraulic nuts, or induction heaters should be used in the mounting and dismounting processes. These tools ensure the smooth process of mounting or dismounting, in order to minimize the risk of damage.
Avoid corrosion
It is crucial that you should not expose bearings to the presence of water for a long time, as it will lead to rust and corrosion. It will also cause the premature failure of the bearings, which can affect the machine performance and productivity. As a result, it will increase your operating costs. Also, make sure to wear gloves when handling bearings. Perspiration can also lead to rust and corrosion.
Proper lubrication
If you want to have a prolonged life of your bearings, it is crucial that they should be properly lubricated. The correct lubricant depends on the environmental conditions, temperature, speed and load. In this case, it is advisable that you should follow your manufacturer’s recommendations.
Products Description
We're professional power end components manufacturers and suppliers in China, specialized in providing high quality products and service. We warmly welcome you to buy high-grade power end components at competitive price from our factory.
Stuffing Box and Oil Seal, Mud Pump Bearing, Crankshaft and Connecting Rod