CN106401786A - Sealing device used for micro-miniature rotor engine - Google Patents

Abstract

A sealing device for a miniature rotor engine disclosed by the invention relates to a sealing device for a miniature rotor engine in the form of a combination of spring sheets and sealing sheets, and belongs to the field of miniature rotor engines. The invention includes a sealing sheet and a spring sheet. The spring piece is arc-shaped, and the middle parts of the two ends in the up and down direction are provided with grooves for matching with the gap of the rib plate. The top of the sealing sheet is arc-shaped, and the middle part is rectangular. The upper and lower ends of the back of the sealing sheet have bosses to prevent the movement of the spring sheet. The middle of the back of the sealing sheet is processed with ribs to reduce the area of gas leakage. The gap between the rib plate and the slot at the end of the spring leaf is matched, and the grooves on the upper and lower sides of the spring leaf can straddle the two sides of the rib plate. During installation, the back of the spring sheet is in contact with the bottom part of the rotor sealing groove, and the top of the sealing sheet is in contact with the inner wall of the cylinder. The invention can reduce the wear amount of the sealing sheet, improve the eccentric wear in the working process of the sealing sheet, improve the power and service life of the miniature rotor engine, and is convenient for installation.

Description

A sealing device for a micro rotor engine

technical field

The invention relates to a sealing device for a micro-rotor engine, in particular to a sealing device for a micro-rotor engine in the form of a combination of a spring plate and a sealing plate, and belongs to the field of a micro-rotor engine.

Background technique

With the development of micro-electro-mechanical systems (MEMS), the development of micro-energy systems with small volume, light weight, high energy density, and continuous operation has become the focus of attention in various countries. Compared with conventional power supply equipment, micro-engines use hydrocarbons as fuels, and their energy density is higher than that of battery systems. Due to the development of fuel diversification, they also have the potential for low cost. Therefore, micro-engines will have a wide range of application prospects in electronic devices in various industries such as industry, agriculture, environmental protection, and medical care.

The current research on the micro rotor engine mainly focuses on the structure and mechanism research, while neglecting the research on the sealing structure. As the miniature rotor engine shrinks, its radial seal has a significant impact on the performance of the microrotor engine. Due to a small amount of air leakage, the engine power will be greatly reduced. In addition, the micro-rotary engine is prone to failure due to the high sliding speed between its sealing plate and the cylinder due to the high rotating speed. Therefore, it is very necessary to invent a sealing device that is not prone to air leakage and sealing sheet failure for micro-miniature engines.

Contents of the invention

Aiming at the problem of complex structure and easy failure of the sealing device for rotor engines in the prior art, the present invention discloses a sealing device for micro-rotor engines. The technical problem to be solved is to provide a sealing device for micro rotor engines with a reasonable The sealing device of the small rotor engine reduces the wear amount of the sealing sheet, improves the eccentric wear of the sealing sheet during the working process, improves the power and life of the micro-rotor engine, and is easy to install.

The purpose of the present invention is achieved through the following technical solutions:

The invention discloses a sealing device for a miniature rotor engine, which comprises a sealing sheet and a spring sheet. The spring piece is arc-shaped, and the middle parts of the two ends in the up and down direction are provided with grooves for matching with the gap of the rib plate. The top of the sealing sheet is arc-shaped, and the middle part is rectangular. The upper and lower ends of the back of the sealing sheet have bosses to prevent the movement of the spring sheet. The middle of the back of the sealing sheet is processed with ribs to reduce the area of gas leakage. The ribs are matched with the grooves at the ends of the springs, and the grooves on the upper and lower sides of the springs must be able to straddle both sides of the ribs. During installation, the back of the spring sheet is in contact with the bottom part of the rotor sealing groove, and the top of the sealing sheet is in contact with the inner wall of the cylinder.

The gas in the high-pressure combustion chamber of the micro-rotary engine pushes the sealing sheet to one side of the radial sealing groove of the rotary engine, and at this time, a wider gas flow is formed on the other side of the radial sealing groove on the rotor of the rotary engine and the sealing sheet Channel, through which the high-pressure gas flows to the back of the sealing plate, and flows to the low-pressure combustion chamber through the narrow channel on the other side of the sealing plate and the sealing groove. In the prior art, the back of the sealing sheet has a rectangular hollow, and the entire rectangular hollow is a leakage channel. In the present invention, a rib for reducing the gas leakage area is processed in the middle of the back of the sealing sheet, thereby reducing the leakage area in the leakage channel, thereby reducing the leakage from the high-pressure combustion chamber to the low-pressure combustion chamber, and improving the power of the micro-rotor engine.

Because the flow process of leaking gas through the above-mentioned leakage channel is a dynamic and unstable process, gas leakage flows from the high-pressure combustion chamber to the low-pressure combustion chamber, because the increased ribs of the present invention reduce the leakage area of the sealing sheet leakage channel compared to the prior art. Small, the leakage area is reduced and the resistance of the dynamic unsteady gas flow is increased, so the gas pressure at the back of the sealing sheet of the present invention is lower than that at the back of the traditional sealing sheet. In this case, the contact force between the sealing plate and the cylinder will be smaller, thereby reducing the wear amount of the sealing plate. In addition, since the pressure fluctuation at the back of the sealing sheet is smaller than that in the prior art, the eccentric wear during the working process of the sealing sheet can be improved and the service life of the engine can be increased.

Beneficial effect:

1. Compared with the traditional sealing device for micro-rotor engines, the sealing device for micro-rotor engines disclosed in the present invention can effectively reduce the leakage of micro-rotor engines from the high-pressure combustion chamber to the low-pressure combustion chamber through the bottom of the sealing plate. capacity.

2. Compared with the traditional sealing device for micro-rotor engines, the sealing device for micro-rotor engines disclosed in the present invention can effectively reduce the gas pressure acting on the back of the sealing sheet during the working process, thereby reducing the pressure of the sealing sheet. The amount of wear increases the life of the seal.

3. Compared with the traditional micro-rotor engine sealing device, the invention discloses a micro-rotor engine sealing device, which can effectively reduce the gas force at the back of the sealing sheet and the gas at the top of the sealing sheet during the working process The pressure difference can improve the eccentric wear in the working process of the sealing sheet.

4. Compared with the traditional micro-rotor engine sealing device, the present invention discloses a micro-rotor engine sealing device. The sealing sheet and spring sheet disclosed in the present invention are easy to install and reliable in operation.

5. Compared with the traditional micro-rotor engine sealing device, the sealing device for the micro-rotor engine disclosed by the present invention can improve the power and life of the micro-rotor engine.

Description of drawings

Figure 1 is a schematic diagram of the cylinder rotor and sealing sheet of a micro-rotary engine.

Fig. 2 is a front view of the spring leaf.

Figure 3 is a left side view of the leaf spring.

Fig. 4 is a plan view of the sealing sheet.

Fig. 5 is a front view of the sealing sheet.

Fig. 6 is a rear view of the sealing sheet.

Fig. 7 is an assembly drawing of the sealing sheet and the spring sheet.

Fig. 8 is a sectional view of the assembly of the sealing sheet and the spring sheet.

Fig. 9 is a cross-sectional view of the assembly of a conventional sealing sheet and a spring sheet.

Among them: 1—cylinder, 2—sealing plate, 3—rotor, 4—phase spur gear, 5—spring leaf.

detailed description

The present invention will now be described in further detail in conjunction with the accompanying drawings, which are all simplified schematic diagrams, and only schematically illustrate the basic structure of the present invention, so they only show the configurations related to the present invention.

Example 1:

A sealing device for a miniature rotary engine disclosed in this embodiment is shown in FIG. 1 . Taking a 5CC rotor engine with a radius of 21mm, an eccentricity of 3mm and a thickness of 14.5mm as an example, the sealing piece 2 and the spring piece 5 are installed in the sealing groove on the rotor. Front view and left view. FIG. 4 , FIG. 5 and FIG. 6 are top view, front view and rear view of the sealing sheet 2 . The sealing sheet 2 and the spring sheet 5 are installed in the sealing groove on the rotor, wherein the arc portion of the top of the sealing sheet 2 is in contact with the cylinder 1 . The spring piece 5 is installed on the spring piece on the back of the sealing piece 2, and its arc top is in contact with the bottom of the sealing groove. The two bosses on the back of the sealing piece 2 can prevent the movement of the spring piece 5 and have a certain pre-tightening force. Under the situation of the sealing plate 2 and the spring plate 5 are installed in the sealing groove, it can guarantee the sealing of the micro-rotor engine in the working process during the working process.

The spring piece 5 of this embodiment is an arc-shaped leaf spring piece, and its left view is shown in FIG. 3 . There are grooves with a width of 1 mm and a depth of 5 mm on both sides respectively. The width of this groove is slightly larger than the width of the upper and lower ribs on the back of the sealing sheet, generally 0.05 mm. The back rib of the sealing sheet 2 is shown in FIG. 6 . The contact form of the spring sheet 5 and the sealing sheet 2 with the rotor 3 and the cylinder 1 is shown in FIG. 7 . Spring leaf 5 is owing to being processed with groove, and its groove straddles the rib at the bottom of sealing sheet, and the two ends of spring sheet 5 contact with the boss at the two ends of sealing sheet, and its back part contacts with rotor 3 parts at the bottom of the rotor sealing groove. During the installation process, the spring sheet 5 is compressed to provide a pre-tightening force in the direction of the sealing sheet 2 . Because the ribs on the upper and lower sides pass through the spring plate, the gas in the high-pressure combustion chamber flows to the low-pressure combustion chamber through the bottom of the sealing plate during the working process of the micro-rotor engine. The channel area of the low-pressure combustion chamber is reduced. 29mm ² , the current design of the sealing device is 7.25mm ² , which reduces the amount of air leakage. In addition, the gas pressure fluctuation at the bottom is reduced, which can reduce the eccentric wear phenomenon at the top of the sealing sheet 2 .

In addition, it should be noted that the specific embodiments described in this specification may be different in terms of parts, shapes and names of parts, and the diameters of sealing sheets and spring sheets may be changed accordingly according to specific requirements. The size in the figure is only an illustration of the structure of the present invention, and is used to explain the present invention, and is not used to limit the protection scope of the present invention. Any modifications and equivalent replacements made within the spirit and principles of the present invention , improvements, etc., should be included within the protection scope of the present invention.

Claims (7)

1. a kind of miniature rotor electromotor sealing device it is characterised in that：Including diaphragm seal (2) and spring leaf (5)；Spring Piece (5) is arc, has the groove for coordinating with floor gap in the middle part of the two ends on above-below direction；Diaphragm seal (2) top is arc Shape, mid portion is rectangle, and the upper and lower ends at diaphragm seal (2) back have the boss preventing spring leaf (5) play, diaphragm seal (2) it is machined with the floor reducing gas leakage area in the middle of back；The groove gap that described floor and spring leaf (5) end are opened Cooperation, the groove of the upper and lower both sides of spring leaf (5) need to guarantee the both sides across floor.

2. as claimed in claim 1 a kind of miniature rotor electromotor sealing device it is characterised in that：During installation, spring The back of piece (5) is contacted with the part of rotor (3) seal groove bottom land, and the top of diaphragm seal (2) is connect with the inwall of cylinder (1) Touch.

3. as claimed in claim 1 or 2 a kind of miniature rotor electromotor sealing device it is characterised in that：Microminiature turns Diaphragm seal (2) is pushed to the side of the radial seal groove of rotary engine by the indoor gas of sub- engine high pressure burning, now exists The opposite side of radial seal groove on rotary engine rotor (3) forms wider gas flow channel, high pressure with diaphragm seal (2) Gas passes through this channel flow to the back of diaphragm seal (2), is flowed to low by diaphragm seal (2) passage narrow with seal groove opposite side Pressure combustor；By being machined with the floor reducing gas leakage area in the middle of diaphragm seal (2) back, reduce in leakage path Leakage area, and then reduce the leakage rate to low-pressure burner for the high compression combustion chamber, improve miniature rotor engine power.

4. as claimed in claim 3 a kind of miniature rotor electromotor sealing device it is characterised in that：Increased floor phase Reduce than the diaphragm seal leakage path leakage area in prior art, leakage area increased dynamically unstable gas while reduction The resistance of body flowing, the gas pressure at described diaphragm seal (2) back is less than the pressure at conventional seals piece back, this kind of situation Contact force between lower sealing piece (2) and cylinder (1) will be less, and then reduces the wear extent of diaphragm seal (2).

5. as claimed in claim 3 a kind of miniature rotor electromotor sealing device it is characterised in that：Described diaphragm seal (2) pressure oscillation at back is less than the pressure oscillation at the diaphragm seal back in prior art, can improve diaphragm seal work process In eccentric wear, increase engine life.

6. as claimed in claim 3 a kind of miniature rotor electromotor sealing device it is characterised in that：In installation process In, spring leaf (5) is squeezed can provide pretightning force to the direction of diaphragm seal (2).

7. as claimed in claim 3 a kind of miniature rotor electromotor sealing device it is characterised in that：For generating radius For 21mm, eccentric throw is 3mm and thickness is the 5CC rotary engine of 14.5mm, and the width of groove is more than the upper of diaphragm seal (2) back The 0.05mm of the width of lower rib.