How should one choose the SQP series vane pumps from Tokyo Kikai when making a selection?

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The Tokyo Kikai vane pump SQP series is a lightweight and compact pump that features an oil pump with a housing made of aluminum-based material, as well as a movable molded component located within this housing. The movable molded component is at least partially made of a sinterable iron-based alloy containing at least one austenite phase, and it has a coefficient of thermal expansion that is at least 60% of that of the housing’s coefficient of thermal expansion. SQP Tokyo Kikoki oil pumps come in three categories: in-line, distributed, and single-type. In all cases, what is crucial for an oil pump is the pump itself. The amount of oil pumped, the pressure, and the time must all be highly precise, and adjusted automatically according to the load. The oil pump is a component that requires precise processing and complex manufacturing techniques; oil pumps for diesel engines in cars, both domestically and internationally, are generally produced by a few specialized manufacturers around the world. The SQP Tokyo Kikki oil pump requires a power source to operate; its camshaft at the lower part is driven by the engine crankshaft gear. The key component of an injection pump is the plunger. Using a common hospital syringe as an analogy, the movable plug is the plunger, while the barrel of the syringe corresponds to the plunger sleeve. Suppose a spring is installed inside the barrel, pressing against one end of the plunger, with the other end of the plunger in contact with the camshaft. As the camshaft rotates one full circle, the plunger moves up and down once within the plunger sleeve – this is the basic mechanism of movement for the plunger in an injection pump. The mechanical structure of the SQP Tokyo Kikoki oil pump includes the following main components: cam shaft, roller body, plunger and plunger sleeve, plunger spring, rotating sleeve and gear ring, oil outlet valve and valve seat, as well as compression tube connections. The plunger sleeve and the plunger are a pair of key precision components in an injection pump; they are carefully machined and fitted together. The diameter clearance in SQP Tokyo Kikoki’s oil pumps is only 0.001–0.003 mm, and these two components must be replaced as a set – they cannot be replaced individually. SQP Tokyo Kikoki oil pump mechanical installation: 1. The quality of the installation of the SQP Tokyo Kikoki oil pump has a significant impact on the pump’s smooth operation and service life; therefore, the installation and calibration work must be carried out carefully, without any haste. 2. The installation height, length, and diameter of the pump’s suction pipe should meet the calculated values; it is advisable to keep them as short as possible to minimize unnecessary losses (such as those caused by elbows, etc.). Additionally, it is necessary to ensure that the pump does not exceed its allowable net positive suction head during operation. 3. The intake and exhaust pipelines should be equipped with supports. The pump is not allowed to bear the load of the pipeline. 4. The location where the pump is installed should be spacious enough to facilitate maintenance work. SQP Tokyo Kikki oil pump installation sequence: 1. Place the unit on a foundation equipped with anchor bolts, and use paired wedge shims between the base and the foundation for alignment. 2. Loosen the coupling. Place a level on both the pump shaft and the base, adjust the shims to level the unit, and tighten the foot bolts sufficiently to prevent movement. 3. Adjust the concentricity of the pump shaft and the motor shaft; the allowable deviation on the outer surface of the coupling is 0.1 millimeter. The gap between the two coupling planes should be maintained at 2–4 millimeters (the lower value applies for smaller pumps), and this gap must be uniform, with an allowable deviation of 0.3 millimeters. 4. After connecting the pipelines and confirming the rotation direction of the motor, connect the coupling, and then check the concentricity of the shaft once again. 5. After 2–3 hours of actual trial operation of the unit, conduct a final inspection; if no abnormalities are found, the installation is considered successful. During the trial operation, the temperature and vibration of the bearings were checked as follows: 6. During installation, to prevent debris from falling into the machine, all openings in the unit must be covered. 7. To prevent debris in the pipelines from entering the pump, filters should be installed at the pump connection for newly installed pipelines; the effective cross-sectional area of these filters should be 2 to 3 times larger than that of the suction pipe.