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This section provides an overview for trochoid pumps as well as their applications and principles. Also, please take a look at the list of 8 trochoid pump manufacturers and their company rankings. Here are the top-ranked trochoid pump companies as of December, 2024: 1.Tatlee Engineering & Trading Sdn Bhd, 2.SUMITOMO PRECISION PRODUCTS Co., Ltd., 3.CETONI.
Table of Contents
A trochoid pump is an internally inscribed positive displacement pump that transports fluid by meshing an external gear with an internal gear. It is a registered trademark of Japan Oil Pump Co.
It is called a trochoid pump because the tooth profile of the external and internal gears is shaped like a trochoid curve. A trochoid curve is a curve drawn by a fixed point inside or outside a circle when the circle is rolled without sliding along a certain curve.
When an internal gear is driven, the meshing external gear also rotates in the same direction. This makes them compact, and they have features such as low-gear sliding speed, low noise, and low-pressure pulsation. Although trochoidal pumps are most commonly used for pumping oil, they can also be used for coolants, fuels, and special liquids.
Trochoid pumps are mainly used to supply lubricating oil in construction and industrial equipment, machine tools, food machinery, printing machinery, environmental facilities, leisure facilities, and ships. Liquids to be transported include hydraulic systems, abrasive oils, fuels, coolants, and chemicals, other than volatile oils and gasoline.
When selecting trochoid pumps, the operating pressure, speed, discharge rate, temperature, and type of liquid being conveyed should be considered.
Trochoid pumps consist of a circular casing with two gears whose tooth profile is a trochoid curve, a shaft, a bearing, a suction port, a discharge port, a shaft seal, a relief valve, and a suction strainer.
There are two types of gear, one that fits into the inner circular casing and the other that fits inside the outer gear. The number of teeth in the inner gear is one less than in the outer gear, and both gears are eccentric. A shaft is connected to the center of the inner gear to rotate it.
When the inner gear rotates, the outer gear, which is meshed with the inner gear, also rotates, but the outer gear rotates slower than the speed of the inner gear. The volume of the space separated by the two gears then changes. This change in volume causes the fluid to be sucked in at the suction port and discharged at the discharge port, thus functioning as a pump.
Trochoid pumps are pumps with a constant discharge rate. When the rotation speed is constant, the relationship between the discharge volume and pressure is inversely proportional, and the discharge volume is maximum when the pressure is zero. When the pressure is at maximum, the discharge volume is zero, but the drive power is at maximum, which may cause the electric motor to overload.
Trochoid pumps have four characteristics:
Clogging of the suction piping or strainer can cause problems such as failure to raise the discharge pressure. The filter on the suction side should be inspected and cleaned. There is also a possibility that air cannot be suctioned and discharged due to pinholes in the line or improper tightening at the flange.
Furthermore, when the machine is restarted after a long shutdown, the viscosity of the liquid may have increased or it may be sticking. Failures that cause liquid leakage are most likely due to deterioration or damage to the sealing parts. It is important to perform preventive maintenance by deciding on a maintenance cycle, such as periodically replacing oil seals and other consumable parts.
There is also a possibility of one-sided tightening for leakage at the flange surface. When cavitation occurs in the pump, abnormal noise is generated. If cavitation is occurring, the suction pressure of the pump should be measured and the loss or resistance on the suction piping side should be lowered as much as possible.
If the liquid is near the saturation vapor pressure of the liquid due to outside temperature, it may flush. If the bearing part is damaged, the bearing must be replaced. It is important to perform maintenance to replace them periodically as consumable parts.
*Including some distributors, etc.
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Sumitomo Precision Products Co. Ltd., established in 1961 and headquartered in Amagasaki, Japan, is a manufacturer of several products, including hydraulic controls, semiconductor manufacturing equipment, aerospace equipment, and environmental systems. It began manufacturing large heat exchangers in 1963, large propellers in 1967, and LNG vaporizers in 1969. In 1974, it began making ozone generators, and in 1988, it started manufacturing equipment for space applications. The company is ISO 14001 certified, and its product portfolio includes landing gear systems for commercial flights, high-temperature heat exchangers, coolant components for machine tools, LNG vaporizers, and silicon oxide sacrificial layer etching systems.
Nippon Oil Pump Co., Ltd., founded in 1919 and established in 1960 with headquarters in Saitama, Japan, is a manufacturer of pumps and hydraulic motors. The company's product line includes bi-rotational pumps, fuel pumps, self-priming rotary vane water pumps, and a range of filter pumps. These products are used for removing sludge from machining equipment coolant fluids as well as components in industrial machinery and motors. The company serves industries that include agriculture, mining, energy, automotive, and material handling.
Enerpac, since 1910, has been a manufacturer of advanced industrial tools and a service provider located in MenomoneeFalls, Wisconsin, USA. The company produces power units, machine moving tools, pipe blenders, tension meters, and load cells. It also created cutters, gantries, presses, cylinders, and strand jacks used in aerospace, bridges, automotive, mining, and power generation industries. The firm offers rental products, training, hydraulic education, and services such as bolting, tool crib inspection, and calibration. It has 8 manufacturing facilities in The Netherlands, USA, Spain, UK, China, and India.
CETONI GmbH, established in 1991 and located in Korbußen, Germany, is an ISO 9001-certified manufacturer of fluid handling and automation systems. The company’s product lineup includes its Qmix brand modular fluid mixing and reaction systems, and its neMESYS brand syringe pumps for industrial as well as scientific fluid handling applications. It also offers control and monitoring software for its portfolio products, and custom automation services for clients with unique projects. The company’s products are used mainly in the biotech, pharmaceutical, and chemical industries.
Tatlee Engineering & Trading (JB) Sdn Bhd, based in Johor, Malaysia, is a supplier of specialized engineering products. The company's product range encompasses pipes, non-spark tools, PTFE products, industrial felt, and electric motors. Furthermore, it maintains an extensive inventory of products from over 200 brands, which include Vogel, Tokai, Siemens, Powtek, and Helix. The company stocks several types of pumps, including dosing, high-pressure, pneumatic, and vacuum pumps. It also sells related spares for some of its products and has offices in Kuala Lumpur and Prai.
Ranking as of December 2024
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | Tatlee Engineering & Trading Sdn Bhd |
33.3%
|
| 2 | SUMITOMO PRECISION PRODUCTS Co., Ltd. |
15.9%
|
| 3 | Nippon Oil Pump Co.,Ltd. |
14.3%
|
| 4 | CETONI |
12.7%
|
| 5 | ENERPAC |
11.1%
|
| 6 | HYDROPROCESS |
6.3%
|
| 7 | All World Machinery Supply Inc. |
6.3%
|
Derivation Method
The ranking is calculated based on the click share within the trochoid pump page as of December 2024. Click share is defined as the total number of clicks for all companies during the period divided by the number of clicks for each company.Number of Employees
Newly Established Company
Company with a History
*Including some distributors, etc.
| Country | Number of Companies | Share (%) |
|---|---|---|
|
Japan
|
3 | 60.0% |
|
Germany
|
1 | 20.0% |
|
Malaysia
|
1 | 20.0% |
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