CN202510363U

CN202510363U - Blade of power steering pump

Info

Publication number: CN202510363U
Application number: CN201220130850XU
Authority: CN
Inventors: 刘健
Original assignee: DALIAN ESTAR STEERING SYSTEM Co Ltd
Current assignee: DALIAN ESTAR STEERING SYSTEM Co Ltd
Priority date: 2012-03-30
Filing date: 2012-03-30
Publication date: 2012-10-31
Anticipated expiration: 2022-03-30

Abstract

The utility model discloses a blade of a power steering pump. A suspension oil groove is arranged under a forward surface in the rotation motion direction of the blade. According to the blade of the power steering pump, provided by the utility model, the oil groove is arranged under the forward surface in the motion direction of the blade, hydraulic suspension is formed based on the backpressure of the bottom of a groove opening, and the hydraulic suspension forms reacting force corresponding to frictional force F2 of a blade bottom corner (in the front of the blade motion direction) and the side face of a rotor slot, so that the frictional force at the blade bottom corner is reduced, and the attrition of the rotor slot at the blade bottom corner (in the front of the blade motion direction) is reduced.

Description

The power steering pump blade

Technical field

The utility model relates to a kind of power steering pump blade.

Background technique

In recent years, the development of the truck of China is introduced powerful motor kind rapidly along with motor manufacturers such as Weihe River bavin, heavy vapour, Xi Chai, Yuchai are continuous; The truck tractive force and the carrying capacity of China continue to increase, and increase sharply to 400 Thomas's power from 200 Thomas's power several years ago, and horsepower are also in continuous increase; Yet big variation does not take place in the form of power assistance pump for steering and structure, has the high load with small power phenomenon, and especially truck is used in the mine; On the large-tonnage vehicle, often overload transportation, and often be in the limited conditions state that the original place heavy duty turns to; At present, the manufacturer of power assistance pump for steering just merely increases the pressure and the flow of pump, not the increase of corresponding capacity and changing; Make power assistance pump for steering often be in the limiting operationg condition of big pressure, significantly reduce working life, as depicted in figs. 1 and 2; Scraping can not form oil film between former design blade base angle and the rotor, and notch moving direction front side is easy to wear, the heavy wear problem of rotor and blade mainly occurs.

The model utility content

The purpose of the utility model provides a kind of power steering pump blade that reduces rotor in the wearing and tearing of blade bottom.

The utility model for realizing the technological scheme that above-mentioned purpose adopted is: a kind of power steering pump blade is provided with the suspension oil groove below blade rotatablely moves the forward surface of direction.

Said suspension oil groove is arranged on the one-sided of blade.

Said suspended oil groove depth is 0.3-0.3008mm.

The power steering pump blade of the utility model; Below the moving direction forward surface of blade, set up oil groove; Utilize the back pressure of notch bottom to form the hydraulic pressure suspension; With blade base angle (blade movement direction the place ahead) frictional force F2 formation reaction force with the rotor side, the frictional force of blade bottom is reduced, reduce the rotor wearing and tearing that (blade movement direction the place ahead) located at the blade base angle.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is described further.

Fig. 1 is traditional power steering pump blade three-dimensional structure diagram;

Fig. 2 is traditional power steering pump blade plan view;

Fig. 3 is the utility model power steering pump blade three-dimensional structure diagram;

Fig. 4 is the utility model power steering pump blade plan view;

Fig. 5 is the utility model power assistance pump for steering blade-side view (A-A section);

Fig. 6 is the utility model power steering pump blade prolongs stator at You Qu radius contraction state schematic representation in the groove of rotor;

Fig. 7 is the A place partial enlarged drawing of Fig. 6.

Among the figure: 1, suspension oil groove; 2, rotor; 3, blade; 4, stator.

Embodiment

Like Fig. 3-shown in Figure 7, the utility model power steering pump blade is provided with suspension oil groove 1 below blade rotatablely moves the forward surface of direction; This suspension oil groove 1 is arranged on the one-sided of blade 3; The degree of depth of suspension oil groove 1 is 0.3mm-0.38mm, shrinks in the groove of rotor 2 because oil pump when work blade 3 prolongs the radius of stator 4 at laminated oil zone, and the contraction of blade 3 will overcome 3 power; The frictional force F2 of the frictional force F3 between the counterpressure F1 of the pressure oil of rotor root, the reverse face of blade movement direction and rotor notch, blade base angle (blade movement direction the place ahead) and rotor side; Scraping can not form oil film between former design blade base angle and the rotor, and notch moving direction front side is easy to wear, and the utility model is set up suspension oil groove 1 below the moving direction forward surface of blade; Utilize the back pressure of notch bottom to form the hydraulic pressure suspension; Form reaction force with F2, the frictional force that b is ordered reduces, and reduces the rotor wearing and tearing that (blade movement direction the place ahead) located at the blade base angle.

Claims

1. power steering pump blade is characterized in that: below blade rotatablely moves the forward surface of direction, be provided with the suspension oil groove.

2. a kind of power steering pump blade according to claim 1 is characterized in that: said suspension oil groove is arranged on the one-sided of blade.

3. a kind of power steering pump blade according to claim 1 is characterized in that: said suspended oil groove depth is 0.3-0.3008mm.