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Gear pump

A gear pump and gear technology, applied in the direction of pumps, pump components, rotary piston pumps, etc., can solve the problems of reducing the working reliability of gears, shortening the service life of gears, aggravating gear wear, etc. The effect of fire temperature, eliminating quenching stress, improving wear resistance and service life

Active Publication Date: 2018-06-15
SAIKESI HYDRAULIC TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the gears of the gear pump are subjected to a large force during the transmission process and are prone to wear; moreover, the existing gear pumps vibrate greatly during use, which makes the pump body noisy, and further aggravates the wear of the gears, which greatly Reduce the reliability of the gear work and shorten the service life of the gear

Method used

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  • Gear pump

Examples

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Effect test

Embodiment 1

[0029] The gear pump in this embodiment includes a casing and a gear, and the gear includes a gear base and a wear-resistant layer coated on the gear base.

[0030] Among them, the gear matrix includes the following components in mass percentage: 0.15% C, 0.17% Si, 0.50% Mn, 0.80% Cr, 0.6% Ni, 0.5% Cu, 0.1% Ag, 0.1% Gd, 5.5% silicate crystal Whiskers, 0.01% P, 0.01% S, 0.030% Mo, the balance is Fe, the length of silicate whiskers is 5-10 μm, and the aspect ratio is 20-35.

[0031] The thickness of the wear-resistant layer is 5 μm, which is formed by coating the gear substrate with wear-resistant emulsion. The wear-resistant emulsion includes the following components in mass percentage: 33% PVC emulsion, 5.7% nano-Si 3 N 4 , 6.0% porous SiO 2 Microspheres, 6.5% silane coupling agent, 0.3% active agent lecithin, the balance is distilled water, nano-Si 3 N 4 The particle size is 40nm, porous SiO 2 The particle size of the microsphere is 1-3 μm, and the pore size is 10-28 nm....

Embodiment 2

[0034]The difference from Example 1 is that the gear matrix in this example includes the following components by mass percentage: 0.2%C, 0.27%Si, 0.65%Mn, 0.9%Cr, 0.7%Ni, 0.6%Cu, 0.3%Ag, 0.2% Gd, 6.5% silicate whiskers, 0.02% P, 0.02% S, 0.06% Mo, the balance is Fe, the length of the silicate whiskers is 5-10 μm, and the aspect ratio is 20-35.

Embodiment 3

[0036] The difference from Example 1 is that the gear matrix in this example includes the following components by mass percentage: 0.22%C, 0.25%Si, 0.7%Mn, 1.0%Cr, 0.8%Ni, 0.6%Cu, 0.4%Ag, 0.2% Gd, 7.0% silicate whiskers, 0.03% P, 0.03% S, 0.10% Mo, the balance is Fe, the length of the silicate whiskers is 5-10 μm, and the aspect ratio is 20-35.

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Abstract

The invention relates to a gear pump and belongs to the technical field of machines. The gear pump provided by the invention comprises a shell and a gear. The gear comprises a gear base body and a wear-resisting layer coated on the gear base body. The gear base body comprises, by mass, 0.15-0.25% of C, 0.17-0.37% of Si, 0.50-0.80% of Mn, 0.80-1.10% of Cr, 0.6-0.9% of Ni, 0.5-0.7% of Cu, 0.1-0.5% of Ag, 0.1-0.2% of Gd, 5.5-8.7% of silicate whisker, less than or equal to 0.030% of P, less than or equal to 0.030% of S, less than or equal to 0.10% of Mo, and the balance Fe. The gear pump providedby the invention has the characteristics of wear resistance, sound absorption, shock absorption, noise reduction and long service life.

Description

technical field [0001] The invention belongs to the technical field of machinery and relates to a gear pump. Background technique [0002] A hydraulic pump is an important device that converts mechanical energy into fluid energy, and a gear pump is a hydraulic pump commonly used in hydraulic systems. There is a pair of gears with the same modulus and the same number of teeth in the pump body of the gear pump, and the two end covers of the gears are sealed by the pump cover. The tooth grooves of the pump body, the end cover and the gear form a sealed volume space. The meshing line of the two gears along the tooth width direction divides the sealed volume into two parts: the oil suction chamber and the oil pressure chamber, and they are mutually independent during the oil suction and oil pressure processes. connected. When the gear rotates, the oil suction chamber is gradually disengaged due to the gear, and the sealing volume increases, forming a partial vacuum. Under the a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04C2/18F04C15/00
CPCF04C2/18F04C15/00
Inventor 高魏磊
Owner SAIKESI HYDRAULIC TECH CO LTD
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