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Hydrodynamic unit

A technology of hydraulic and driving devices, applied in liquid fuel engines, rotary piston machines, rotary piston/oscillating piston pump components, etc., to achieve the effect of smooth running performance

Active Publication Date: 2012-04-25
TRW AUTOMOTIVE GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention solves this problem by providing a hydraulic device of the kind mentioned at the outset, in which during the rotation of the gear, the control groove periodically creates a pressure equalizing connection

Method used

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Embodiment Construction

[0015] exist figure 1 and figure 2 In , a hydraulic gear pump without a casing is shown. The pump 10 comprises two rotatable shafts 12, 14 on which gears 16, 18 are mounted in a non-rotatable manner. The gears 16, 18 may also be integral with the respective shafts 12 and 14. The gears 16 , 18 have outer helical teeth which are relatively inclined with respect to the axis R of rotation. In the illustrated embodiment, figure 1 The helical teeth of the middle left gear 16 rotate to the left, and the left gear 16 is hereinafter referred to as the first gear 16, and the helical teeth of the right gear (second gear) rotate to the right. The sides of the teeth 20 of a set of gears have the shape of an involute.

[0016] The two shafts 12, 14 are rotatably mounted on bearing brackets 22, 24 according to figure 1 In the mounting position of the pump 10 shown in , the bearing brackets 22 , 24 are labeled upper bearing bracket 22 and lower bearing bracket 24 . The first shaft 12 ...

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Abstract

A hydraulic device comprises two engaged gears, each of which has an outer inclined tooth and is arranged between the inlet side and the outlet side. The end side of the gear is provided with at least one control groove. The control groove generates the pressure balance connection periodically during the rotation of the gear.

Description

technical field [0001] The invention relates to a hydrodynamic device comprising two meshing gears, each having outer helical teeth and arranged between an inlet side and an outlet side, at least one control groove being provided on the end side of the gears . Background technique [0002] In general, aside from the quality of the gears and their good fit (wheelbase, bearing clearance, etc.), the gears in a gear train will obviously run quietly if you achieve as high a coincidence ratio as possible. Therefore, it is desirable to use devices in which at least two teeth of one gear always mesh simultaneously with two teeth of the other gear during rotation of the meshing gears. [0003] In addition to minimizing noise, efficiency is of particular importance in hydrodynamic outboard gear pumps. In order to obtain good mechanical and volumetric efficiency, the outer diameter of the gears and their axle base are chosen such that an optimum ratio between gear diameter and (radia...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04C2/18F04C15/00
CPCF04C2/16F04C2/088F04C15/0049F04C2/14
Inventor M·约尔丹S·霍佩J·弗勒尔兴格
Owner TRW AUTOMOTIVE GMBH