CN215762240U

CN215762240U - From pressure release structure and contain its high-pressure equipment

Info

Publication number: CN215762240U
Application number: CN202121721956.2U
Authority: CN
Inventors: 蓝榕江; 梁永达; 谢创生; 王勇; 丁学超
Original assignee: Gree Green Refrigeration Technology Center Co Ltd of Zhuhai; Zhuhai Landa Compressor Co Ltd
Current assignee: Gree Green Refrigeration Technology Center Co Ltd of Zhuhai; Zhuhai Landa Compressor Co Ltd
Priority date: 2021-07-26
Filing date: 2021-07-26
Publication date: 2022-02-08
Anticipated expiration: 2031-07-26

Abstract

The utility model provides a self-pressure-relief structure and high-voltage equipment comprising the same, relates to the technical field of compressors, and solves the technical problem that the compressor is easy to damage when running in an overload mode. The self-pressure-relief structure comprises an air guide hole and a pressure regulating part, wherein the air guide hole is arranged on a sliding sheet and can enable an air suction cavity and a compression cavity to be communicated, and the pressure regulating part is movably arranged on the sliding sheet and can open or close the air guide hole; the movable power source of the pressure regulating part is air pressure in the compression cavity; the pressure regulating part comprises a first pressure part which is connected with the sliding block through a sliding block to provide pressure relief balance force, and the pressure relief balance force is opposite to the pushing force applied to the sliding block by air in the compression cavity. When the utility model is applied to the compressor, when the pressure in the compression cavity is too high to exceed the upper limit of the set exhaust pressure, the utility model can drive the pressure regulating piece to open or completely open the air guide hole part by the self-pressure of the compression cavity, thereby realizing the pressure relief function, avoiding the accelerated wear and even damage caused by the overload operation of the compressor, protecting the safety of the compressor and prolonging the service life.

Description

From pressure release structure and contain its high-pressure equipment

Technical Field

The utility model relates to the technical field of compressors, in particular to a self-pressure-relief structure and high-pressure equipment comprising the same.

Background

During operation of the compressor, due to the influence of an extreme environment or the abnormality of terminal equipment, overload operation of the compressor can be caused, accelerated wear and even damage of the compressor can be caused, and the customer experience of a product is influenced. To avoid such problems, the compressor system is equipped with a pressure switch, and the compressor system stops when the pressure is exceeded, but the compressor is continuously and repeatedly started and stopped, and the customer experience is also influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a self-pressure-relief structure and a compressor comprising the same, so as to solve the technical problem that the compressor in the prior art is easy to damage when running in an overload state.

In order to achieve the purpose, the utility model provides the following technical scheme:

the utility model provides a self-pressure-relief structure, which comprises an air guide hole and a pressure regulating part, wherein the air guide hole is arranged on a sliding sheet and can enable an air suction cavity and a compression cavity to be communicated; the movable power source of the pressure regulating piece is air pressure in the compression cavity.

As a further improvement of the utility model, the pressure regulating part comprises a first pressure part, wherein the sliding block is connected with the sliding block to provide a pressure relief balance force, and the pressure relief balance force is opposite to the pushing force applied to the sliding block by the gas in the compression cavity.

As a further improvement of the utility model, the first pressure member is an elastic member.

As a further development of the utility model, the elastic element is a spring.

As a further improvement of the utility model, an adjusting cavity is arranged in the sliding sheet; the air guide holes are formed in two side walls of the adjusting cavity, and an opening is formed in the adjusting cavity and communicated with the compression cavity through a pipeline; the sliding block is arranged in the adjusting cavity in a sliding manner; one end of the elastic element is abutted to the sliding block, and the other end of the elastic element is abutted to the adjusting cavity.

As a further improvement of the utility model, the sliding block is provided with a through hole, and when the sliding block is pushed to different positions, the through hole is overlapped or staggered with the air guide hole, so that the air guide hole is opened or closed.

As a further improvement of the present invention, the overlapping state of the through hole and the air guide hole includes a partially overlapping state and a completely overlapping state.

As a further improvement of the utility model, when the elastic element is in the extreme compression state or the state close to the extreme compression state, the through hole is completely overlapped with the air vent.

As a further improvement of the utility model, the diameter of the through hole is equal to the diameter of the air guide hole.

As a further improvement of the present invention, when the air guide hole is opened by the slider, the jacking force is greater than or equal to a set pressure relief; when the air guide hole is closed by the sliding block, the jacking force is smaller than the set pressure relief force.

The utility model provides high-voltage equipment which comprises the self-pressure-relief structure.

As a further development of the utility model, the high-pressure device is a compressor.

Compared with the prior art, the utility model has the following beneficial effects:

the self-pressure-relief structure provided by the utility model is arranged on high-pressure equipment such as a compressor, when the pressure in a compression cavity is too high to exceed the upper limit of the set exhaust pressure, the self-pressure-relief structure can drive a pressure regulating piece to open or completely open an air guide hole part by virtue of the air pressure of the compression cavity, and the communication between the compression cavity and an air suction cavity can be realized by opening an air guide hole, so that the high pressure can be reduced, the pressure-relief function is realized, the function of the compressor with a pressure relief device is realized, the accelerated wear and even damage caused by the overload operation of the compressor are avoided, the safety of the compressor is protected, and the service life is prolonged; when the self-pressure-relief structure is mounted on an end product, the risk of overpressure rupture or leakage is reduced through the self-pressure-relief effect after overpressure; through with configuration on the high-voltage equipment from pressure release structure, improve customer experience, reduce the use risk, can guarantee the operation of not shutting down.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a cross-sectional view of the self-venting feature of the present invention;

FIG. 2 is a schematic diagram of the self-venting structure of the present invention in a non-venting state;

FIG. 3 is a cross-sectional view along AA in FIG. 2;

FIG. 4 is a schematic diagram of the self-venting structure in a venting state according to the present invention;

fig. 5 is a schematic view of the structure of the compressor of the present invention.

In the figure 1, air vents; 2. adjusting a pressing piece; 3. an elastic element; 4. a through hole; 100. sliding blades; 200. an air suction cavity; 300. a compression chamber; 400. a cylinder; 500. a rotor; 600. a slide groove.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the utility model, and not restrictive of the full scope of the utility model. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.

Example 1:

as shown in fig. 1, the present invention provides a self-pressure-releasing structure, which comprises an air vent 1 disposed on a sliding vane 100 and capable of communicating an air suction cavity 200 and a compression cavity 300, and a pressure regulating member 2 movably disposed on the sliding vane 100 and capable of opening or closing the air vent 1; the moving power source of the pressure regulating part 2 is the air pressure in the compression cavity 300.

The air guide hole 1 can be opened or closed through the pressure regulating part 2, so that the communication or the partition of a compression cavity and an air suction cavity can be realized, and a power source for controlling the movement of the pressure regulating part 2 is high-pressure air in the compression cavity, so that the movement of the pressure regulating part 2 can be controlled by utilizing the air pressure of the pressure regulating part when the air pressure in the compression cavity is too high, the communication of the two cavities is realized, and the pressure relief process is realized.

It should be noted that, in the present embodiment, the self-pressure-releasing structure may be installed on the compressor to perform self-pressure-releasing of the compressor.

Wherein, the compressor includes the circular cylinder 400, the circular cylinder 400 is equipped with a cylindrical rolling rotor 500 inside; the rolling rotor 500 is eccentrically arranged in the cylinder 400 and is tangent to the cylindrical surface of the cylinder 400, a crescent space is generated in the cylinder 400, the cylinder 400 is provided with a sliding sheet 100 which can do reciprocating motion, the sliding sheet 100 is always kept in contact with the rotor 500 by a spring, the crescent space is divided into A, B two spaces which are not communicated with each other, wherein the space A is an air suction cavity 200, the space B is a compression cavity 300, an air suction port and an air exhaust port are arranged on the cylinder 400 close to the sliding sheet 100, an air exhaust valve plate is arranged, and the inner volume of the cylinder A, B is changed continuously along with the rotation of the rotor 500 in the cylinder 400. When the tangent point of the rotor 500 and the cylinder 400 rotates through the air suction port, the space A is communicated with the air suction port and increases along with the increase of the rotation angle of the rotor 500, air is continuously sucked through the air suction port, when the rotor rotates to the position of the tangent point on the sliding sheet 100, the end surface of the sliding sheet 100 rises to the surface of the cylinder 400 to be flat due to the pushing of the rotor 500, the volume of the space A reaches the maximum value at the moment, the air suction process is finished, when the rotor continues to rotate, the original air suction space A is transposed into the compression space B and is reduced along with the continuous rotation of the rotor, the pressure of the internal air is compressed to exceed the pressure in the exhaust cavity, the exhaust valve is opened, the air is exhausted out of the cylinder, the volume of the space A is continuously increased, the air suction and the air compression and exhaust process are continuously realized, namely the air suction and the air compression and the exhaust process is continuously realized.

The self-venting structure of the present invention is mounted on the slider 100.

The sliding vane 100 is provided with an air guide hole 1 which can communicate the air suction cavity 200 and the compression cavity 300, and the air guide hole 1 is opened or closed to communicate or separate the air suction cavity 200 and the compression cavity 300.

As an alternative embodiment of the present invention, the pressure adjusting member 2 includes a slider and a first pressure member coupled to the slider to provide a pressure relief balance force in a direction opposite to a pushing force applied to the slider by the gas in the compression chamber 300.

Further, the first pressure member is an elastic member 3.

Further, the elastic member 3 is a spring. The spring needs to be selected according to the set discharge pressure of the compressor.

The spring can generate rebound force after being compressed, the rebound force can also change along with the compression of the spring, the rebound force is larger when the compression amount is larger, namely, in the utility model, the pressure relief balance force provided by the first pressure piece can be increased along with the increase of the top thrust, and is not compressed when the pressure relief balance force is equal to the top thrust, so that the slide block does not move, and a transient balance state is formed.

That is, a transient balance state is formed by the pressure relief balance force and the pushing force of the gas in the compression cavity 300 acting on the slider, so that the slider keeps basically constant after moving in place; once the top thrust is changed, namely the air pressure in the compression cavity is increased to exceed the upper limit of the set exhaust pressure of the compressor, the transient balance is broken, the top thrust is greater than the pressure relief balance force of the previous stage, the sliding block is pushed to move to one side of the spring, the spring is compressed, when the spring is further compressed, the rebound force generated by the spring is increased, namely the pressure relief balance force is equal to the top thrust at the moment, the sliding block stops moving; the slider removes and then carries out the intercommunication realization high pressure release process in compression chamber and the chamber of breathing in when opening air guide hole 1, in case when compression intracavity air pressure reduces to within the set for exhaust pressure upper limit, and top thrust descends, further breaks the balance of last stage, and the pressure release balancing force that the spring provided is greater than top thrust this moment for the slider is to keeping away from spring one side and removes, thereby makes the spring compression volume reduce, and the slider closes the air guide hole, from this, constantly goes on: the automatic pressure relief process of the compressor is realized through the adjusting processes of moving, transient balancing, balance breaking, moving and secondary balancing;

when the air pressure in the compression cavity is different from the upper limit value of the set exhaust pressure, the size of the pressure relief range can be adjusted by opening the air guide hole 1, so that the compressor can be ensured to operate in a safe exhaust pressure range.

As an alternative embodiment of the present invention, a regulation cavity is provided in the slider 100; the air guide holes 1 are formed in two side walls of the adjusting cavity, namely the two air guide holes 1 are arranged, one air guide hole is arranged on one side facing the air suction cavity, and the other air guide hole is arranged on one side facing the compression cavity; communication through the regulating chamber; an opening is formed in the adjusting cavity, and the opening position needs to be provided with a first pressure piece and is communicated with the compression cavity 300 through a pipeline; the sliding block is arranged in the adjusting cavity in a sliding mode, one end of the elastic element is abutted to the sliding block, and the other end of the elastic element is abutted to the adjusting cavity;

as an alternative embodiment of the present invention, the air vent 1 can be completely shielded by the slider to achieve the effect of closing the air vent 1, and the air vent 1 can be partially shielded or completely exposed to achieve the effect of opening the air vent 1.

As another optional embodiment of the present invention, the slider is provided with a through hole 4, and when the slider is pushed to different positions, the through hole 4 and the air guide hole 1 are overlapped or staggered, so as to open or close the air guide hole 1.

Furthermore, the coincidence state of the through hole and the air guide hole comprises a partial coincidence state and a complete coincidence state. The pressure relief capacity in the partially overlapped state is smaller than that in the completely overlapped state, and the method is suitable for the condition that the air pressure in the compression cavity is not too high above the set upper limit of the exhaust pressure.

When the through hole 4 is completely staggered with the air guide hole 1, the normal compression state of the compressor is shown in fig. 2 and 3. When the through hole 4 and the air guide hole 1 are partially or completely overlapped, the compressor is in a variable capacity or pressure relief state, as shown in fig. 4.

Further, when the elastic element 3 is in a limit compression state or a state close to the limit compression state, the through hole 4 is completely overlapped with the air vent 1.

Further, the diameter of the through hole 4 is equal to that of the air guide hole 1.

As an alternative embodiment of the present invention, when the air guide hole 1 is opened by the slider, the pushing force Fp is greater than or equal to the set relief force F1; when the air guide hole 1 is closed by the sliding block, the jacking force Fp is smaller than the set pressure relief force F1; it should be noted that the set discharge pressure F1 is a force acting on the surface (area is S) of the slider when the compressor sets the upper limit Px of discharge pressure, that is, F1 is Px × S, and the balance force Fk is Fp provided by the first pressure element. And when the high-pressure equipment is a compressor, setting the upper limit of the exhaust pressure as the upper limit of the exhaust pressure of the compressor. And when the high-pressure equipment is other equipment, the working pressure of the equipment is the working pressure of the equipment.

The utility model also provides high-voltage equipment which comprises the self-pressure-relief structure.

As shown in fig. 5, the high-pressure device may be a compressor, but may be other devices operating under high-pressure conditions. In the case of a compressor, the compressor includes a cylinder 400, a rotor 500 eccentrically disposed in the cylinder 400, and a sliding vane 100 installed between the cylinder and the rotor, and a spring is disposed in front of the sliding vane and the cylinder. The sliding sheet is always abutted to the rotor through the spring, and the complete separation between the air suction cavity 200 and the compression cavity 300 is kept.

The cylinder 400 is provided with a vane groove 600, and the vane 100 is mounted in the vane groove 600.

The principle of the self-pressure-relief structure provided by the utility model is illustrated as follows:

as shown in fig. 4, when the compressor is in a pressure relief state, the slider is balanced by a gas force Fp and a spring force Fk in the operation direction, the gas force Fp increases, the spring deforms by extrusion to move the slider inwards, finally, the through hole 4 in the slider is communicated with the gas guide hole 1 in the sliding vane 100, and high-pressure gas in the compression cavity 300 flows back to the suction cavity from the through hole 4, so that the effects of capacity change and pressure relief are achieved.

The working state of the self-pressure-relief structure provided by the utility model is switched as follows:

1) working under the normal load state of the compressor, under the action of the elastic element and the gas pressure, the through hole on the sliding block and the gas guide hole on the sliding sheet are in a separated state (the state shown in figures 2 and 3), and the compressor compresses normally;

2) when the compressor works in an overload state, the gas pressure Fp greatly rises to compress the elastic element, so that the through hole in the sliding block and the gas guide hole of the sliding sheet are in a superposed state (a state shown in figure 4), and the compressor releases pressure at the moment;

the overload degrees are different, the opening degrees of the through holes are different, and finally the compressor can work normally under relatively stable pressure.

It should be noted that "inward" is a direction toward the center of the accommodating space, and "outward" is a direction away from the center of the accommodating space.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in fig. 1 to facilitate the description of the utility model and to simplify the description, but are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered as limiting the utility model.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. A self-pressure-relief structure is characterized by comprising an air guide hole and a pressure regulating part, wherein the air guide hole is arranged on a sliding sheet and can enable an air suction cavity and a compression cavity to be communicated, and the pressure regulating part is movably arranged on the sliding sheet and can open or close the air guide hole; the movable power source of the pressure regulating piece is air pressure in the compression cavity.

2. The self pressure relief structure according to claim 1 wherein said pressure regulator comprises a first pressure member having a slider coupled to said slider to provide a pressure relief balance force in a direction opposite to a jacking force exerted on said slider by gas in a compression chamber.

3. The self pressure relief structure according to claim 2, wherein said first pressure member is an elastic element.

4. The self pressure relief structure according to claim 3 wherein said resilient element is a spring.

5. The self pressure relief structure according to claim 3 or 4, wherein an adjustment chamber is provided in said slide; the air guide holes are formed in two side walls of the adjusting cavity, and an opening is formed in the adjusting cavity and communicated with the compression cavity through a pipeline; the sliding block is arranged in the adjusting cavity in a sliding manner; one end of the elastic element is abutted to the sliding block, and the other end of the elastic element is abutted to the adjusting cavity.

6. The self-pressure-relief structure according to claim 5, wherein the sliding block is provided with a through hole, and when the sliding block is pushed to different positions, the through hole is overlapped or staggered with the air-guide hole, so as to open or close the air-guide hole.

7. The self pressure relief structure according to claim 6, wherein said coincident states of said through hole and said air vent comprise a partially coincident state and a completely coincident state.

8. The self-venting structure according to claim 7, wherein said through hole completely coincides with said air vent when said elastic element is in a state of extreme compression or near extreme compression.

9. The self pressure relief structure according to claim 6 wherein said through hole diameter is equal to said air vent diameter.

10. The self-venting structure according to claim 2, wherein the jacking force is greater than or equal to a set venting pressure when the slider opens the air vent; when the air guide hole is closed by the sliding block, the jacking force is smaller than the set pressure relief force.

11. A high-voltage device, comprising a self-venting structure according to any one of claims 1-10.

12. The high-pressure apparatus of claim 11, wherein the high-pressure apparatus is a compressor.