shimadzu hydraulic pump parts free sample

For the past 50 years, Shimadzu gear pumps have achieved total customer satisfaction through high efficiency, stable performance, and superior durability. Our gear pumps are used in wide range of applications, including material handling equipment, specially-equipped vehicles, construction, and agricultural machinery.

Mounted directly under a vessel, SBJV and SBJLV gear pumps have a special wide-mouth suction port to ensure the extraction of high viscosity polymer of approximately 20,000 Pa·s (0.250 bar). (Ex. polystyrene)

SBJ series pumps are available in 4 model types to meet a variety of applications, in capacities ranging from 45 cm3/rev to 25000 cm3/rev. Easily find a pump that satisfies your requirements.Applications

SBJV gear pumps are installed under a reactor to discharge various types of polymers such as PET and PS. These high-pressure pumps raise pressure from a vacuum to 25 MPaG (250 bar) in a single step. Large diameter suction port is perfect for extracting high-viscosity polymers.

Compact pump provides maximum 7 MPaG (70 bar) discharge pressure, making it suitable for prepolymers. Attached directly to bottom of vacuum chamber, this pump"s large-diameter port allows pumping of even high-viscosity liquids.

Delivers reliable feed under high suction pressures. This gear pump is designed as a booster pump for environments with suction pressures of over 1 MPaG.

To prevent air from entering the shaft seal, a portion of the polymer from the discharge side is sent via the valve to the shaft seal to provide a fixed pressure in the shaft seal. A channel in the pump body returns the polymer to the suction port. For more information, contact your nearest Shimadzu sales representative.Shaft Seal Comparison Table

There are two types of piston hydraulic gears, such as the piston hydraulic gears, and the piston hydraulic gears are used. They are made of torsion-free hydraulic gears, which are a series of torsion-free hydraulic gears, and the piston hydraulic gears. The torsion-free hydraulic gears are mainly used in the production of piston hydraulic gears, but are not classified because of the two piston hydraulic gears, the piston hydraulic gears, and the piston hydraulic gears. They are mainly used in the form of pneumatic hydraulic gears, which are separated and pressurized.

Conventionally, various gear pumps or gear motors are developed and disclosed including the following patent literature 1. For example, a conventional gear pump 100 shown in FIG. 10 includes a drive gear 102, a driven gear 104, a drive shaft 106 formed integrally with the drive gear 102, a driven shaft 108 formed integrally with the driven gear 104, a gear housing chamber 110 in which the drive gear 102 and the driven gear 104 are housed, and a casing 114 including bearing holes 112 in which each of the shafts 106 and 108 is housed. The casing 114 is divided into a body 116 and a front 118, and the gear housing chamber 110 is formed in the body 116. As shown in FIG. 11, in the body 116, a suction passage 118 for introducing liquid (hydraulic oil) into the gear housing chamber 110 and a discharge passage 120 for discharging the liquid are formed. If the drive shaft 106 is rotated, the drive gear 102 and the driven gear 104 are rotated, and the liquid flows from the suction passage 118 to the discharge passage 120.

The gear pump 100 is used to supply liquid to a liquid-pressure (oil-pressure) cylinder. Because the liquid is sent to the liquid hydraulic cylinder under pressure, vibration is generated when the drive gear 102 and the driven gear 104 mesh. The vibration is a cause of noise of the gear pump 100. If the mass of the casing 114 is increased, the noise is reduced by the increased amount. However, the casing 114 is significantly heavier, and the price of the gear pump 100 is also greatly increased, and thus it is unrealistic.

The gear pump or the gear motor of one or some exemplary embodiments of the disclosure includes: gears which mesh and pair with each other; a casing which includes a gear housing chamber for housing the gears; and at least one hollow layer which are configured in the casing and divides the casing into inner walls and outer walls.

A gear pump 10 of the embodiment of the application shown in FIG. 1 includes gears 12, 14, shafts 16, 18 which can rotatably support the gears 12, 14, and a casing 20 in which the gears 12, 14 and the shafts 16, 18 are housed.

A suction passage 44 and a discharge passage 46 are formed in the casing 20 (FIG. 2). Liquid (hydraulic oil) is sucked from the suction passage 44 to the gear housing chamber 32, and the liquid is discharged from the gear housing chamber 32 through the discharge passage 46. If the drive shaft 16 is rotated, the drive gear 12 and the driven gear 14 are rotated, and the liquid flows from the suction passage 44 to the discharge passage 46.

The body 26 is produced by casting, and thus parts which become the hollow layers 50 are formed in the mold in advance. The body 26 can be produced in the same production method as before.

As in a gear pump 70 in FIG. 8, hollow layers 72 may be formed in the front 28 of the casing 20. Parts where vibration is attenuated by the hollow layers 50 of the body 26 and the hollow layers 72 of the front 28 become large. Vibration is attenuated easily, and sound is silenced easily. In the front 28, thicknesses of inner walls 74 and outer walls 76 may also be made different in a manner that coincidence critical frequencies fcof the inner walls 74 and the outer walls 76 are different.

In a gear pump 80 in FIG. 9, the casing 20 is divided into the body 26, the front 28 and a rear 82. The gear housing chamber 32 is formed in the body 26, and the gear housing chamber 32 is blocked by the front 28 and the rear 82. The embodiment of the application also includes hollow layers 50 in the aforementioned casing 20. If hollow layers 50 are formed in the body 26 as shown in FIG. 9, hollow layers may or may not be formed in the front 28 and the rear 82.

(Item 1) A gear pump or a gear motor includes: gears which mesh and pair with each other; a casing which includes a gear housing chamber for housing the gears; and hollow layers which are formed in the casing and divide the casing into at least inner walls and outer walls.

According to the gear pump or the gear motor of item 1, the hollow layers are formed in the casing, and thus vibration propagated through the casing is hard to propagate by the hollow layers. The vibration of the casing is reduced, and noise is reduced.

According to the gear pump or the gear motor of item 2, the coincidence critical frequencies of the inner walls and the outer walls are different, and thereby it is hard for vibration passing through the inner walls to pass through the outer walls. The vibration of the casing can be reduced.

According to the gear pump or the gear motor of item 3, although vibration is generated due to the meshing of the gears arranged in the gear housing chamber, the hollow layers are arranged at places where the vibration is propagated most strongly, and the noise is easily reduced.

According to the gear pump or the gear motor of item 4, there is a plurality of hollow layers, and thereby parts with reduced sound transmitted through the casing are increased, and the noise is easily reduced.

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