CN108894911A - A kind of primary and secondary blade construction of hydraulic motor - Google Patents

Abstract

The present invention designs a structure of a sub-blade of a hydraulic motor, including a stator, a mother blade, a sub-blade, and a rotor. The mother blade is respectively provided with a long oil hole and a short oil hole, and an oil hole is arranged between the bottom of the mother blade and the rotor. The advantages of the present invention are: the structure of the blade is symmetrical, which meets the requirements of the forward and reverse rotation of the hydraulic motor; during the working process, it can ensure that the mother blade is close to the inner wall of the stator without falling off, forming a sealed cavity to realize the normal operation of the hydraulic motor; there is no need to install a spring at the root of the blade, which improves Vane motor life.

Description

A mother-child blade structure of a hydraulic motor

technical field

The invention relates to the field of hydraulic components, and specifically designs a blade structure for a hydraulic motor.

Background technique

The vane hydraulic motor is a widely used hydraulic motor. The vane is closely attached to the inner surface of the stator to form a closed pressure chamber for oil suction and oil discharge, and generates rotary motion to achieve work. The vane of the existing vane hydraulic motor The contact surface between the tip and the stator is relatively large, and the wear is serious; the spring installed at the root of the blade is prone to fatigue damage, which affects the service life of the blade motor.

Contents of the invention

Aiming at the existing technical defects, the present invention proposes a blade structure for hydraulic motors that ensures that the top of the blade does not separate from the stator and reduces blade wear, and is suitable for low-speed and high-speed continuous rotary motors.

A blade structure for a hydraulic motor according to the present invention includes a stator 1, a mother blade 2, a daughter blade 5, and a rotor 7, an oil passage 6 is arranged between the mother blade 2 and the rotor 7, and the daughter blade is installed in the middle part of the lower part of the mother blade 5. There are two symmetrical long oil holes 3 on the mother blade 2. The long oil hole 3 includes two sections of thickness, the thicker section communicates with the top of the mother blade 2, and the thinner section communicates with the top of the mother blade 2. The roots are connected, and the long oil hole 3 introduces the high-pressure oil in the oil passage 6 into the mother blade 2; The oil is introduced into the area between the mother vane 2 and the daughter vane 5; the position where the mother vane 2 contacts with the daughter vane 5 is a tooth-like structure.

A blade structure for a hydraulic motor, wherein a circular arc groove structure is opened in the middle of the top of the mother blade 2, and two symmetrical long oil holes 3 and two short oil holes 4 are provided on the mother blade 2. A sub-blade 5 is installed in the middle of the mother blade 2 , and a toothed structure is provided at the contact between the mother blade 2 and the sub-blade 5 , and there is an oil passage 6 between the blade root of the mother blade 2 and the rotor 7 .

A blade structure for a hydraulic motor, characterized in that the long oil hole 3 is divided into two thick and thin sections, the thicker section is connected to the arc groove structure on the top of the mother blade 2, and the thinner section is connected to the blade root of the mother blade 2, The short oil outlet hole 4 is an elongated hole, which communicates with the oil passage 6 and the area between the daughter vane 5 and the mother vane 2 .

Advantages of the present invention include:

1. Open a long oil hole on the mother blade 2 to ensure the pressure balance between the upper and lower blades;

2. There is an arc-shaped groove on the top of the blade to reduce the contact between the top of the blade and the inner surface of the stator 1 and reduce wear;

3. The symmetrical blade structure is adopted to ensure the forward and reverse working requirements of the motor; the spring installation is canceled, and the sub-blade and the mother blade are used instead to ensure that the top of the blade is close to the inner wall of the stator, which meets the high-speed and low-speed working occasions, and at the same time improves the life of the hydraulic motor .

Description of drawings

Fig. 1 is a kind of hydraulic motor blade structure schematic diagram designed by the present invention;

Figure 2 is an enlarged view of the arc groove at the top of the blade;

Fig. 3 is a sectional view of blade installation taking 8 blades as an example.

In Fig. 1: 1-stator; 2-female blade; 3-long oil hole; 4-short oil hole; 5-child blade; 6-oil passage; 7-rotor.

Detailed ways

A blade structure for a hydraulic motor according to the present invention is shown in the figure. The sub-blade 5 is inserted into the lower middle position of the mother blade 2, and then the sub-blade and the mother blade are installed between the stator 1 and the rotor 7, wherein the mother blade 2 There is an oil channel 6 between the root of the rotor and the rotor 7, and the installation position of the mother blade 2 and the daughter blade 5 is a tooth-shaped structure, which increases the oil film area between the mother blade 2 and the daughter blade 5, and plays a better supporting role. There are two symmetrical long oil holes 3 in the blade 2, allowing the oil in the oil passage 6 to enter the arc-shaped groove on the top of the mother blade 2 from the long oil holes 3, so as to realize the up and down movement of the mother blade 2. The pressure is balanced. The long oil hole 3 includes two sections of thickness. When the hydraulic oil enters the thicker section from the thinner section, a damping effect is generated, and an upward force is generated on the mother blade 2, so that the mother blade 2 is ejected; the mother blade 2 2 is provided with two symmetrical short oil holes 4, the high-pressure oil in the oil passage 6 can enter the area formed between the sub-blade 5 and the mother blade 2 through the short oil holes 4, and the tooth-shaped structure increases the hydraulic oil film formation The surface area of the hydraulic motor produces a large ejection force on the mother blade 2. Both the mother blade 2 and the daughter blade 5 adopt a symmetrical structure to meet the requirements of the forward and reverse rotation of the hydraulic motor.

The working principle of the present invention is as follows: before the hydraulic motor starts to work, high-pressure oil is passed into the oil passage 6, and the high-pressure oil produces a damping effect during the process of passing through the long oil hole 3, and produces a push-out force on the mother blade 2, and the part The high-pressure oil enters between the daughter vane 5 and the mother vane 2 from the oil passage 6 through the short oil hole 4, and the increase in the tooth structure increases the contact area of the hydraulic oil, and the pressure of the hydraulic oil is higher than the top pressure of the mother vane 2, ensuring that the mother vane 2 Not separated from the stator 1, the mother blade 2 and the inner wall of the stator 1 form a sealed cavity, and then realize the oil suction and oil discharge process of the hydraulic motor; because the mother blade 2 and the daughter blade 5 adopt a symmetrical structure design, the mother blade 2 and the stator 1 are always in close contact , The hydraulic motor can be realized in forward and reverse directions.

Claims (2)

1. A blade structure for a hydraulic motor, comprising a stator 1, a mother blade 2, a long oil hole 3, a short oil hole 4, a daughter blade 5, and an oil passage 6, and an arc groove is arranged in the middle of the top of the mother blade 2 structure, the mother blade 2 is provided with two long oil holes 3 and two short oil holes 4, the middle position of the mother blade 2 is equipped with a daughter blade 5, and the contact between the mother blade 2 and the daughter blade 5 is provided with Toothed structure, there is an oil passage 6 between the root of the female blade 2 and the rotor 7 . 2. A blade structure for a hydraulic motor according to claim 1, wherein the long oil hole 3 is divided into thick and thin sections, the thicker section is connected to the arc groove structure at the top of the mother blade 2, and The thin section communicates with the blade root of the mother blade 2 , and the short oil outlet hole 4 is a long and thin hole, communicating with the oil passage 6 and the area between the daughter blade 5 and the mother blade 2 .