GARDNER DENVER TGH Pump

Power End: a solid foundation built with strength and precision

A. The superiority of ductile iron: structural advantages derived from materials science

TGH pump power side of the frame, eccentric shaft and connecting rod and other core load-bearing components, are made of high-specification Nodular Iron (Nodular Iron) * * * precision casting.

Excellent vibration damping properties: ductile iron microstructure contains spherical graphite, this unique structure makes it has far more than steel vibration absorption capacity. Under high-frequency cyclic loading of reciprocating pumps, this characteristic can effectively suppress and attenuate vibration, and reduce the impact on gears, bearings and other transmission components from the source, significantly extend the service life of the whole power system.

Higher strength-to-weight ratio and structural integrity: by precision casting, we can optimize the geometry of the frame and reinforce it at key stress points, thereby improving overall rigidity and fatigue strength while also improving the strength of the frame, the weight is controlled at about 25% lower than that of a welded steel structure of the same strength.

Excellent casting performance and cost-effectiveness: the fluidity of ductile iron is better than that of steel, enabling it to be molded into complex structures at one time, reducing the need for subsequent machining. This not only ensures the consistency of product size, but also brings significant cost advantages.

B. Drive Core: the perfect combination of precision and durability

TGH pump transmission system is the key to its reliability, each component has been carefully designed and selected materials to withstand and efficient transmission of 400 horsepower power.

Eccentric design: using the classic eccentric shaft structure, Gardner Denver's time-tested and durable design converts the rotary motion of the drive end into the reciprocating linear motion of the crosshead smoothly and efficiently.

Precision Gear reduction system: the pump is equipped with an external gear reduction box with a total reduction ratio of 10.15:1. The gears are made of high-quality alloy steel and heat-treated to ensure smooth meshing and long-term wear resistance in line with high industry standards such as AGMA.

Full range heavy duty bearing configuration: to cope with complex radial and axial loads, the TGH pump uses a full range of heavy duty roller bearing options. The eccentric shaft is supported by double row spherical roller bearings, while the double overhanging intermediate shaft is supported by heavy duty straight roller bearings. This targeted bearing configuration ensures the stable operation of the transmission components and the minimum friction loss under any working conditions.

Replaceable bronze crosshead skateboard: the Crosshead Guide (skateboard) is the key friction pair for the reciprocating motion of the power end. The TGH pump uses a replaceable bronze skateboard. As an excellent wear-resistant material, bronze has self-lubricating characteristics, which can effectively reduce the friction coefficient even under boundary lubrication conditions, protect the crosshead and the rack guide, and reduce the friction coefficient, its replaceable design also greatly simplifies the maintenance process and reduces maintenance costs.

C. Lubrication system: the lifeblood of the power end

Continuous and clean lubrication is the cornerstone to ensure the long-life operation of the power end. The lubrication system of the TGH pump is carefully designed to ensure that every moving part is adequately protected.

Forced pressure lubrication: the heart of the system is an integrated gear-driven oil pump that delivers filtered oil at constant pressure to all key moving parts, including main bearings, connecting rod bearings, and crosshead pins. This forced lubrication method is far superior to simple splash lubrication, especially at low speed or heavy load conditions, to ensure the formation of a stable and reliable oil film to prevent direct contact between metals.

Comprehensive lubrication coverage: the system also includes auxiliary crosshead lubrication systems and convenient grease filling points, further demonstrating its attention to detail and commitment to the long-term reliability of the equipment2.

Condition Monitoring and maintenance: equipped with oil pressure gauge and replaceable oil filter, so that the operator can monitor the health status of the lubrication system in real time, and can be easily maintained, ensure the cleanliness of lubricating oil.

A. Source of strength and toughness: forged alloy steels and Autofrettage processes

The hydraulic end of TGH pump adopts three-stage cylinder design, and its core material is forged alloy steel 2 with strict heat treatment. Forging was chosen over casting because it eliminates the microscopic defects in the material and results in a dense, fibrous crystalline structure with unmatched strength and toughness, this is the basis for withstanding high-pressure cyclic loading.

However, the strength of the material itself is not enough. The true core of the TGH pump's hydraulic end is the Autofrettage process. This is a precisely controlled prestressing process:

Application of ultra-high pressure: during the manufacturing process, an internal hydraulic pressure is applied to the forged cylinder that is well above its rated operating pressure.

Produce plastic deformation: huge pressure on the inner wall of the cylinder material plastic (permanent) deformation, and the outer wall is in the range of elastic deformation.

Formation of residual compressive stress: when the pressure is removed, the outer wall in the elastic state attempts to recover, resulting in a strong extrusion effect on the inner wall that has undergone plastic deformation, a permanent, beneficial layer of residual compressive stress is formed on the inner wall of the cylinder.

This greatly reduces the actual stress amplitude of the material under cyclic loading, thus improving the anti-fatigue life of the hydraulic end by up to 300% , and effectively inhibiting the initiation and propagation of fatigue cracks.

B. Wearing parts for durability: selected materials and precision workmanship

The performance of wearing parts directly determines the maintenance cycle and operation cost of pumps. Each wearing part of the TGH pump is carefully selected and precisely machined to ensure its best performance in its respective position.

Plunger technology

Standard equipment: Colmonoy cylinder (plunger) : TGH pump standard with industry-famous Colmonoy plunger. This is a nickel-based alloy that contains chromium, boron and silicon. By a special metallurgical process, these elements form diamond-like crystals of chromium-boron compounds and carbides in the alloy matrix. This unique microstructure gives the plunger surface extremely high hardness (Rockwell hardness up to HRC 59-64) , making it excellent wear resistance, corrosion resistance, high temperature resistance and scratch resistance. Colmonoy plungers can significantly extend life when pumping sand slurry, acid, or other corrosive fluids.

Optional configuration: to meet the special requirements of different working conditions, we also offer hardened steel, ceramic and tungsten carbide plunger options, showing the wide applicability of TGH pump.

Valve Assembly (body and seat)

Core materials and standards: TGH Pump Valve Assembly strictly follow the API 7K standard manufacturing, to ensure product quality and interchangeability with industry standards. The body and seat are made of high quality forged alloy steel (20CrNiMo/AISI 8620) to ensure structural strength under high pressure impact.

Carburizing: the process by which carbon is incorporated into the surface layer of a low-carbon alloy steel and then quenched to form a hardened layer of extremely high hardness (Rockwell hardness greater than HRC 60) , to resist erosion and wear from high-velocity mud.

High-performance Urethane valve rubber: the valve is dual stem guided and equipped with high-performance Urethane valve rubber. Polyurethane material has excellent wear resistance and chemical resistance, can provide a reliable, durable seal under high pressure, effectively prevent leakage, to ensure the volumetric efficiency of the pump.

Table 1: Table of performance parameters for TGH 400hp (intermittent mode)

Note: Piston/cylinder liner construction is only suitable for 23/4", 3", 31/2"And 4" sizes. A plunger/packing configuration is recommended for pressures in excess of 4,000 PSI or for acidic liquid service.

B. Core technical specifications

Table 2: key technical specifications for TGH 400HP

Source:

Tailored to your specific operating conditions

The following options are designed to enhance the performance of the TGH pump, extend its service life and enhance operational safety:

Plunger stuffing box mechanical lubricator: in the treatment of high abrasive fluid, this device can provide continuous, automatic lubrication for the plunger packing, significantly reduce wear and prolong the packing and plunger life.

Suction and discharge pulsation buffers: reciprocating pumps generate inherent pressure pulsations during operation. The installation of surge absorbers, or surge chambers, effectively absorbs these pulsations and makes the flow of fluid in the pipe more stable. This not only protects downstream equipment and instrumentation from hydraulic shock, but also improves pump volumetric efficiency and reduces overall system vibration and noise.

Pressure safety valve: this is the key safety valve of the whole high pressure system. The pressure safety valve can quickly open when the system pressure unexpectedly exceeds the preset safety value, and discharge the high-pressure fluid, thereby protecting the pump body, manifold and downstream equipment from overpressure damage, it can prevent the occurrence of major safety accidents.

Skid integration services: we offer a complete skid solution that integrates the TGH pump with your specific motor or diesel engine on a sturdy custom steel skid seat. This integrated design not only facilitates transportation and rapid field deployment, but also ensures the precise alignment of the drive system and the pump, providing a solid foundation for long-term stable operation of the pump.

Plunger flushing system: when pumping highly corrosive or crystallizing fluids (e. g. , acid, brine) , residual fluid can cause lasting damage to the packing and plunger. The plunger flushing system can clean the plunger surface by continuous liquid spray, and effectively prolong the service life of the wearing parts.

Oil-water heat exchanger: in high-temperature environment or long-term heavy-duty operation, the power end of the lubricating oil temperature may rise, affecting the lubrication effect. Oil-water heat exchanger can effectively control the temperature of the lubricating oil, so that it is always maintained in the best working range, so as to protect the power side of the precision components.

By offering these comprehensive options, we aim to move beyond the role of traditional equipment provider and become your true operating partner. We have a deep understanding of the challenges you face on site -- from extreme temperatures to highly abrasive fluids -- and are ready to offer engineering-proven solutions. This is Gardner Denver's design philosophy: we offer not just a pump, but a complete, reliable platform for high-pressure fluids that will meet the challenges of the future.

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