Dual-gear oil pump

Abstract

The invention discloses a dual-gear oil pump, wherein gear shafts are arranged in a cavity of an oil pump body, and gear sleeves are sleeved on the gear shafts; the oil pump body comprises a front cover, a front pump body, a connection plate, side plates, a rear pump body and a rear cover, and the side plates are positioned in the cavities of the front pump body and the rear pump body; the gear shafts respectively comprise a drive gear shaft and a driven gear shaft; gears respectively comprise a front drive gear, a rear drive gear, a front driven gear and a rear driven gear; the front drive gears are meshed with the front driven gears, and the two side plates are respectively positioned at the two sides of the front drive gears and the front driven gears; and the rear drive gears are meshed with the rear driven gears, and the other two sides plates are respectively positioned at the two sides of the rear drive gears and the rear driven gears. The dual-gear oil pump has the advantages that the position precisions of gear holes and spindle holes can be ensured, the stress balance of the gears is realized, the bearing and shock-resistance capabilities of the gear oil pump are improved, the starting torque of the gear oil pump and heat which is produced by the friction among between the gears and the side plates are reduced and the like.

Description

technical field [0001] The invention relates to a double gear oil pump. Background technique [0002] According to the relevant national standards of the mining industry, gear oil pumps used in underground operations are not allowed to be made of aluminum alloy materials, so as to prevent mine accidents caused by the inevitable aluminum and magnesium dust generated when the gear oil pump is working. In the existing technology, duplex Gear oil pump such as Figure 9 The front and rear covers, connecting plates and pump body shown are generally made of aluminum alloy, which cannot meet the explosion-proof requirements of the mining industry. [0003] In the prior art, the parts are positioned and connected by two positioning pins, such as Figure 9 As shown, the existing problem is that when the positioning pin holes are processed on the two ends of the front pump body and the rear pump body, it is difficult to ensure the coaxiality and position accuracy, so it is difficult to...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the parts are positioned and connected by two positioning pins, such as Figure 9 As shown, the existing problem is that when the positioning pin holes are processed on the two ends of the front pump body and the rear pump body, it is difficult to ensure the coaxiality and position accuracy, so it is difficult to ensure that the gear holes on the front pump body are consistent with those on the front cover. The position accuracy of the main shaft hole and the gear hole on the rear pump body and the main shaft hole on the connecting plate increases the radial force of the front driving gear and the rear driving gear, reduces the service life of the gear oil pump, and reduces the product performance , at the same time, the shape of each part is large for processing two positioning pin holes, which increases the weight and cost

[0005] In the existing technology, the oil inlet and outlet ports are generally set on the pump body, and the hydraulic oil flows directly into the pump body along the diameter direction of the gear, causing a great impact on the gear set and affecting the service life of the gear oil pump.

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