Wear-resistant structure of side end faces of gear in gear pump or cam in cam pump
A side face, gear pump technology, applied in pumps, pump components, rotary piston pumps, etc., can solve problems such as tooth side leakage, high bonding strength of steel surface, pump failure, etc.
Pending Publication Date: 2018-11-13
徐晓旭
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Problems solved by technology
And this kind of material that is commonly used as metal cutting tools has enough hardness, but is too brittle, and the bonding strength with the steel surface has always been the biggest problem.
[0008] A large number of tests have proved that when the hard particles in the pumped medium squeeze into the gap between the gear or the side end surface of the cam and the side plate, the hard particles will laterally hit the leading edge of the hard alloy layer on the side end surface of the gear or cam, resulting in a strong shock. Shearing force, if the hard alloy layer is combined with the front edge of the gear or cam, if the treatment is not good, the hard alloy layer will fall off in canine-shaped pieces from front to back, resulting in internal leakage on the tooth side and pump failure
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[0024] Such as figure 1 and figure 2 Shown is an embodiment of the wear-resistant structure on the side end surface of a gear. The gear 1 with the wear-resistant structure on the side end surface in the gear pump provided by the present invention has recesses similar in shape to the gear teeth on the end surfaces 11 on both sides. slot 12 (see figure 1 and figure 2 ), with a cemented carbide layer 2 in the groove 12 (see figure 2 ). The upper surface 21 of the cemented carbide layer 2 is flush with the side end surface 11 of the gear 1 (see figure 2 ).
[0025] A protective edge is formed between the outer edge 12a of the groove 12 and the outer contour line 11a of the side end face 11 of the gear 1 (see figure 1 ), usually the gear is made of steel, so the protective edge can be called steel edge A (see figure 2 ), the width a of the steel edge A is between 0.5 and 1.5 mm.
[0026] Same inner steel edge (see figure 1 ), the upper surface 21 of the cemented carbi...
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Abstract
The invention provides a wear-resistant structure of the side end faces of a gear in a gear pump or a cam in a cam pump. Grooves are formed in the two side end faces of the gear or the cam, the uppersurfaces of hard alloy layers in the grooves are flush with the side end faces of the gear or the cam, and thus protective edges, or called steel edges, composed of a gear body or a cam body are formed on the outer peripheries, in the thickness direction, of the hard alloy layers arranged on the two side end faces of the gear or the cam. Under the protection of the steel edges, when the gear or the cam is impacted by hard particles in pumping media and the hard particles are squeezed into gaps between the side end faces of the gear or the cam and side plates, the hard alloy layers cannot falloff. Therefore, the gear pump or the cam pump made of the gear or the cam with the wear-resistant structure can be used for pumping crude oil, coal tar and fuel oil containing quartz sand and other strong abrasive particles and also pumping non-lubricating methanol and other media, and the service life of the gear pump or the cam pump is prolonged 20-40 times compared with that of a common gear pump or cam pump.
Description
technical field [0001] The invention relates to the technical field of gear pumps and cam pumps, and provides a gear pump in a gear pump or a cam side end face wear-resistant structure in a cam pump. Background technique [0002] At present, wear-resistant and corrosion-resistant pumps with low pressure ≤ 1.5Mpa (such as wear-resistant and corrosion-resistant centrifugal pumps) are very popular at home and abroad, but there is no medium-pressure (2 to 4Mpa) super wear-resistant and corrosion-resistant Corrosion, simple structure, low price gear pump or lobe pump, can be used as medium pressure gear pump, lobe pump, etc., not suitable for pumping heavy oil, residual oil, coal tar and Non-lubricating methanol, etc., and medium pressure pumping of such media has a wide range of needs in crude oil, burners and other industries. [0003] There are many wear-resistant and corrosion-resistant solutions for side plates and other parts in medium-pressure wear-resistant pumps, but th...
Claims
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Patent Timeline
Login to View More IPC IPC(8): F04C15/00
CPCF04C2/084F04C2240/20
Inventor 徐晓旭
Owner 徐晓旭