CN214464412U

CN214464412U - Roots type steam power machine

Info

Publication number: CN214464412U
Application number: CN202120345655.8U
Authority: CN
Inventors: 邹晓明
Original assignee: 邹晓明
Current assignee: Guizhou Yuanda Energy Development Co.,Ltd.
Priority date: 2021-02-07
Filing date: 2021-02-07
Publication date: 2021-10-22
Anticipated expiration: 2031-02-07

Abstract

The utility model discloses a Roots type steam power machine; aims to provide a steam power machine with simple structure, convenient manufacture, stable operation and low noise. The two rotors are hermetically arranged in a shell through rotating shafts and are meshed with each other; an air inlet (1) communicated with the inside of the shell (2) is formed in the top of the shell (2) corresponding to the position where the two rotors (7) are meshed, an air outlet (6) communicated with the inside of the shell (2) and larger than the diameter of the air inlet (1) is formed in the bottom of the shell (2) corresponding to the position where the two rotors (7) are meshed, and a first pressure relief opening (4) and a second pressure relief opening (5) are distributed on the left side and the right side of the shell (2); the two rotors (7) are in clearance fit with the inner wall of the shell (2). The utility model has small airflow pulsation, stable operation and small required residual heat steam pressure; is a steam power machine.

Description

Roots type steam power machine

Technical Field

The utility model relates to a steam power machine, in particular to a Roots type steam power machine; belongs to steam power machinery.

Background

As is known to all, a large amount of low-pressure saturated steam which can be developed and utilized secondarily exists in industrial waste heat, and the small Roots type power machine power generation device can recycle the low-quality waste heat steam. The core structure of the small Roots type power machine is mainly a two-blade straight-blade rotor or a three-blade straight-blade rotor, when the base circle volume of a closed straight-blade rotor moves from an air inlet to an air outlet, pressure steam in the base circle volume is instantly communicated with the external atmospheric pressure, and the steam pressure is suddenly released, so that severe impact and vibration are easily caused. In addition, the low-pressure area of the straight-blade rotor is repeatedly generated and disappeared in the rotating process, so that the vibration and noise characteristics are poor, and airflow pulsation and impact noise are high.

Therefore, utility model patent with publication number CN209494592U discloses "a three leaf twist roots type power machine power generation device", but this utility model patent is because only one gas vent, when the tooth's socket has not rotated to the gas vent position yet, the backpressure that the steam that accumulates between the tooth's socket formed can hinder the rotor to rotate to the pressure that leads to required exhaust steam is great, and exhaust steam recycle is difficult.

Disclosure of Invention

The utility model aims at providing a roots type steam power machine which has simple structure, convenient manufacture, stable operation and small noise.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the two rotors are hermetically arranged in a shell through rotating shafts and are meshed with each other; the top of the shell is provided with an air inlet communicated with the inside of the shell corresponding to the position where the two rotors are meshed, the bottom of the shell is provided with an air outlet communicated with the inside of the shell and larger than the air inlet in diameter corresponding to the position where the two rotors are meshed, and a first pressure relief opening and a second pressure relief opening are distributed on the left side and the right side of the shell; the two rotors are in clearance fit with the inner wall of the shell.

Each rotating shaft is fixed with a positioning gear, and the two positioning gears are meshed with each other; the rotor is a gear or an impeller; the two first pressure relief ports and the two second pressure relief ports are respectively communicated with an air inlet of the low-power roots steam power machine through steam pipelines.

Compared with the prior art, the utility model discloses owing to adopted above-mentioned technical scheme, consequently have following advantage:

1) because the gear or the impeller is adopted to replace a two-blade straight-blade rotor or a three-blade straight-blade rotor, and the first pressure relief port and the second pressure relief port are respectively added on the two sides of the shell, the defects of large impact vibration, high noise, large airflow pulsation and unstable operation of the traditional Roots power machine can be overcome;

2) the first pressure relief port and the second pressure relief port are added, so that the back pressure of steam accumulated in the tooth grooves can be gradually released in advance, the blockage of the rotation of the rotor is reduced, the required waste heat steam pressure is low, and the waste heat steam recycling rate is high.

Drawings

Fig. 1 is a schematic structural view of the left rotor of the present invention as a driving wheel;

FIG. 2 is a schematic structural view of the right rotor of the present invention as a driving wheel;

fig. 3 is a top view of fig. 1 or 2.

In the figure: air inlet 1, casing 2, pivot 3, first pressure release mouth 4, second pressure release mouth 5, gas outlet 6, rotor 7, positioning gear 8.

Detailed Description

The invention will be further described with reference to the accompanying drawings and specific embodiments.

As shown in FIGS. 1 to 3: two rotors 7 which are meshed with each other are hermetically arranged in the shell 2 through corresponding rotating shafts 3 respectively, and the two rotors 7 are in clearance fit with the inner wall of the shell 2. An air inlet 1 communicated with the inside of the shell 2 is formed in the top of the shell 2 corresponding to the position where the two rotors 7 are meshed, an air outlet 6 communicated with the inside of the shell 2 and larger than the air inlet 1 in diameter is formed in the bottom of the shell 2 corresponding to the position where the two rotors 7 are meshed, and a first pressure relief opening 4 and a second pressure relief opening 5 are distributed on the left side and the right side of the shell 2.

Because the clearance between the rotor 7 and the inner wall of the shell 2 is very small, the sealing function can be achieved, and the air leakage and communication between the air inlet 1 and the air outlet 6 are prevented; and can rotate without rubbing against the surface. And the two rotors 7 engaged with each other can separate the gas inlet 1 from the gas outlet 6 to form a high pressure region and a low pressure region in the interior of the housing 2, respectively.

In order to facilitate control of a fit clearance between the two rotors 7 and a fit clearance between the rotors 7 and the inner wall, positioning gears 8 are fixed on each rotating shaft 3, and the two positioning gears 8 are meshed with each other.

The rotor 7 may be a gear or an impeller.

In order to improve the utilization rate of output steam, the two first pressure relief ports 4 and the two second pressure relief ports 5 are respectively communicated with an air inlet of a next-stage low-power roots type steam power machine through steam pipelines (not shown in the figure), so that multi-stage linkage is realized. The low-power roots steam power machine is a machine which has the same structure as the utility model but has smaller specification and size.

The working principle is as follows: when high-pressure steam enters a high-pressure area formed by the two rotors 7 and the shell 2 through the air inlet 1, the left rotor 7 actively rotates in the anticlockwise direction and the right rotor 7 passively rotates in the clockwise direction under the action of air pressure because tooth grooves of the left rotor 7 are meshed with tooth crests of the right rotor 7 (see fig. 1); when the tooth grooves with the steam accumulated in the two rotors 7 rotate to the position of the first pressure relief port 4, the steam in the tooth grooves is released partially through the first pressure relief port 4 to be relieved; when the tooth socket storing the steam continues to rotate to the position of the second pressure relief opening 5, the steam in the tooth socket is released again through the second pressure relief opening 5, and the pressure is further relieved; when the tooth grooves in which the steam is accumulated continue to rotate to the position of the air outlet 6, the residual steam in the tooth grooves enters the low-pressure area and is completely released through the air outlet 6.

When the left rotor 7 rotates by a certain angle, the tooth tops of the rotor 7 are engaged with the tooth grooves of the right rotor 7 (see fig. 2), and when high-pressure steam enters a high-pressure area formed by the two rotors 7 and the housing 2 through the air inlet 1, the right rotor 7 actively rotates in a clockwise direction by air pressure, and the left rotor 7 passively rotates in a counterclockwise direction.

The left rotor 7 and the right rotor 7 are respectively and alternately changed in the active and passive relations to rotate in opposite directions under the action of air pressure, so that power is output through the two rotating shafts 3.

Claims

1. A Roots steam power machine comprises two rotors which are hermetically arranged in a shell through rotating shafts and are meshed with each other; the method is characterized in that: an air inlet (1) communicated with the inside of the shell (2) is formed in the top of the shell (2) corresponding to the position where the two rotors (7) are meshed, an air outlet (6) communicated with the inside of the shell (2) and larger than the diameter of the air inlet (1) is formed in the bottom of the shell (2) corresponding to the position where the two rotors (7) are meshed, and a first pressure relief opening (4) and a second pressure relief opening (5) are distributed on the left side and the right side of the shell (2); the two rotors (7) are in clearance fit with the inner wall of the shell (2).

2. The roots-type steam power machine of claim 1, wherein: each rotating shaft (3) is fixed with a positioning gear (8), and the two positioning gears (8) are meshed with each other.

3. The roots-type steam power machine of claim 1 or 2, wherein: the rotor (7) is a gear or an impeller.

4. The roots-type steam power machine of claim 3, wherein: the two first pressure relief ports (4) and the two second pressure relief ports (5) are respectively communicated with an air inlet of the low-power roots steam power machine through steam pipelines.