RU47453U1 - Vane Pump - Google Patents

Abstract

Scope: mechanical engineering. EFFECT: ensuring uniformity of fluid flow and increasing volumetric efficiency of a vane pump. This is achieved by the fact that four shaped profiles are made on the working surface of the stator, forming four working chambers, the supporting bushes are made in the form of disks with discharge windows, and they are pressed against the stator and rotor by means of springs and fluid pressure, there is a mechanical seal for sealing the shaft and a fluid leakage channel from the mechanical seal chamber to the suction cavity.

Description

The utility model relates to mechanical engineering, in particular to vane pumps and can be used in hydraulic systems of various mechanisms.

A double-acting vane pump is known, containing a stator ring with a shaped profile, a rotor with grooves in which the plates are located (Fig. 7.6, p. 270-272 in the textbook - Polyakov VV, Skvortsov LS Pumps and fans: Textbook .for universities. - M .: Stroyizdat, 1990.-336 p.).

However, this technical solution has drawbacks: there is a non-uniformity of the fluid flow, the pressure decreases and the volumetric efficiency of the pump decreases accordingly.

A well-known vane pump containing a housing with inlet and outlet channels, a stator with a working cylindrical surface, support bushings located on both sides of the stator, a rotor having a roller with a cylindrical sleeve mounted on it with grooves for the blades and two clamping elements made with cylindrical surfaces in contact with the support sleeves, forming sliding bearings, and end cheeks placed in the bores of the support sleeves and forming their surfaces facing the stator, working Amer, and associated with one of the clamping elements of the tickler impeller stage (Patent №2040706, IPC F 04 C 2/06 - prototype).

However, this vane pump has a complex structure, low volumetric efficiency, and uneven fluid flow, since two cycles of suction and discharge occur in one revolution of the pump rotor.

The uneven flow of fluid has a negative effect on the operation of the pump and the hydraulic system as a whole.

The utility model is aimed at simplifying the design, ensuring a uniform fluid flow and increasing the volumetric efficiency of the pump.

This is achieved by the fact that four shaped profiles are made on the working surface of the stator, forming four working chambers, the supporting bushes are made in the form of disks with discharge windows, and they are pressed against the stator and rotor by means of springs and fluid pressure, there is a mechanical seal for sealing the shaft and a fluid leakage channel from the mechanical seal chamber to the suction cavity.

The utility model is illustrated by drawings, in which Fig. 1 shows a vane pump, a longitudinal section; figure 2 is the same diagram, cross section.

The vane pump contains a housing 1, a stator 2, made with four shaped profiles 3, a rotor 4, support discs 5 and 6, bearings 7 and 8, a shaft 9, a mechanical seal 10 and end caps 11 and 12. Shaped profiles 3 on the stator 2 together with supporting disks 5 and 6 form four working chambers in which the fluid volume changes and pressure is created. The rotor 4 contains a shaft 9, on which a cylindrical sleeve 13 is installed, having grooves for the plates (blades) 14. The sealing of the stator 2 and rotor 4 from the ends is carried out by supporting disks 5 and 6, which are pressed by means of springs 15 and fluid pressure. In the supporting disks 5 and 6 there are discharge windows 16, which are designed to transfer liquid under pressure from the working chamber to the discharge cavity. Due to the location of the discharge windows 16 on the two supporting disks 5 and 6, the forces arising from the pressure of the liquid on the rotor 4 are mutually balanced. The pump shaft 9 is mounted on two radial ball bearings 7 and 8. To seal the pump shaft 9 and housing

1, the mechanical seal 10 is installed, fluid leaks from the chamber of the mechanical seal 10 are discharged through the channel 17 into the suction cavity. In the housing 1 there is an opening 18 through which the fluid enters the pump, this is the suction cavity, and there are openings 19 through which fluid under pressure exits the pump housing 1, this is the injection cavity.

The vane pump operates as follows.

When the rotor 4 is rotated and due to an increase in the volume of the working chamber, a liquid is sucked in. The working chamber is filled with liquid. With a further rotation of the rotor 4, the plates 14 compress the liquid in contact with the shaped profile of the stator 2. When the rotor 4 is rotated, the plates 14 are constantly pressed against the inner surface of the stator 2 under the action of centrifugal forces and fluid pressure. Compressed fluid by the plates 14 is forced out of the working chamber through the discharge windows 16 located in the supporting disks 5 and 6, and the process of suctioning the liquid into the working chamber takes place. Duty cycle repeats. For one revolution of the rotor 4 there are four cycles of absorption and injection of liquid.

The proposed utility model has a simple design and due to four duty cycles per revolution of the rotor provides a uniform flow of fluid and increase volumetric efficiency.

Claims (1)

A vane pump comprising a housing with inlet and outlet channels, a stator with a working cylindrical surface, supporting bushes placed on both sides of the stator, a rotor having a roller with a cylindrical sleeve mounted on it with grooves for the blades, characterized in that on the working surface of the stator four shaped profiles forming four working chambers, support bushings are made in the form of disks with discharge windows, and they are pressed against the stator and rotor by means of springs and fluid pressure, for rmetizatsii shaft has a mechanical seal and fluid leak path from the mechanical seal chamber into the suction cavity.