Energy adjusting device for screw compressor

Abstract

The utility model relates to the technical field of compressors, and discloses an energy adjusting device for a screw compressor, which comprises a shell, a cavity, an air inlet and an air outlet are arranged in the shell, the air inlet and the air outlet are communicated with the cavity, two meshed screws are arranged in the cavity, a partition plate is arranged on the inner wall of the shell, one side wall of the partition plate is attached to the screws, and the other side wall of the partition plate is attached to the air outlet. A cavity is formed in the shell and divided into a high-pressure cavity and a low-pressure cavity by a partition plate, a piston cavity is formed in the side, close to the partition plate, of the shell, a telescopic groove is further formed in the piston cavity in a communicating mode, a piston is slidably arranged in the piston cavity, the neck of the piston slides in the telescopic groove in an attached mode, and the high-pressure cavity and the low-pressure cavity are communicated through the piston cavity. The high-pressure cavity and the low-pressure cavity are separated, and when the piston is away from the partition plate, the high-pressure cavity communicates with the low-pressure cavity, so that pressure relief between the high-pressure cavity and the low-pressure cavity is conducted, and the problem that existing equipment cannot guarantee that the output capacity of the compressor is matched with the requirement is solved.

Description

Technical Field

[0001] This utility model relates to the field of compressor technology, specifically to an energy regulating device for a screw compressor. Background Technology

[0002] A twin-screw compressor consists of a male and female rotor arranged parallel to each other inside a cylinder. It is a driven fluid machine capable of raising low-pressure gas to high-pressure gas. The clearance between the male and female rotors is controlled by synchronous gears to ensure that they do not contact each other during operation. Current twin-screw compressors control the clearance by installing synchronous gears at the suction ends of the male and female rotors, and by installing sealing assemblies at both ends of the rotor shafts to prevent excessive leakage due to large pressure differences between the internal and external pressures.

[0003] Chinese utility model patent CN218093434U discloses a twin-screw compressor, including a cylinder containing a female screw rotor and a male screw rotor. A female rotor synchronous gear is mounted on the rotor shaft of the female screw rotor, and a male rotor synchronous gear is mounted on the rotor shaft of the male screw rotor. The female rotor synchronous gear meshes with the male rotor synchronous gear. The key feature is that the female screw rotor shaft has a conical section, and the female rotor synchronous gear is mounted on this conical section. The female rotor synchronous gear has an oil injection hole connecting its outer end face to the inner ring sidewall. Alternatively, the male screw rotor shaft has a conical section, and the male rotor synchronous gear is mounted on this conical section. The male rotor synchronous gear also has an oil injection hole connecting its outer end face to the inner ring sidewall. The oil injection hole on the synchronous gear facilitates adjustment of the gap between the male and female rotors.

[0004] During use, the device cannot adjust the compressor capacity, thus failing to ensure that the compressor's output capacity matches the demand. This results in the compressor running at high capacity for extended periods, leading to energy waste and reducing the overall energy efficiency ratio of the refrigeration system, making it impossible to achieve energy conservation and emission reduction. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides an energy regulation device for screw compressors, which has the advantage of automatically adjusting the energy efficiency ratio. This solves the problem that existing equipment cannot adjust the compressor capacity, thus failing to ensure that the compressor's output capacity matches the demand, resulting in energy waste caused by the compressor operating at high capacity for a long time.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: an energy regulating device for a screw compressor, comprising a housing, the interior of which has a cavity, and an air inlet and an air outlet communicating with the cavity, wherein two meshing screws are disposed in the cavity.

[0009] A partition is provided on the inner wall of the housing. One side wall of the partition is fitted to the screw. The cavity is divided into a high-pressure chamber and a low-pressure chamber by the partition. A piston chamber is opened on the side of the housing near the partition. A telescopic groove is also opened on the piston chamber. A piston is slidably arranged inside the piston chamber. The neck of the piston is fitted to the inside of the telescopic groove. The high-pressure chamber and the low-pressure chamber are connected through the piston chamber. When the piston is fitted to the partition, the high-pressure chamber and the low-pressure chamber are separated. When the piston is away from the partition, the high-pressure chamber and the low-pressure chamber are connected, thereby relieving pressure between the high-pressure chamber and the low-pressure chamber.

[0010] Preferably, the housing has a movable chamber, a pressure relief chamber, and a fixed groove arranged in sequence. The movable chamber and the pressure relief chamber are connected by a pressure relief seat. The movable chamber is connected to the piston chamber through a connecting vent pipe. The pressure relief chamber is connected to the low-pressure chamber. An air inlet is provided on the movable chamber, which is connected to the high-pressure chamber. An adjustment mechanism is provided inside the fixed groove. The adjustment mechanism is used to control the valve ball located in the movable chamber.

[0011] When the regulating mechanism is energized, the valve ball is moved to the pressure relief seat by magnetic force, thereby blocking the moving chamber and the pressure relief chamber. At this time, the air inlet is connected to the moving chamber, thereby filling the piston chamber with high-pressure gas from the high-pressure chamber, causing the piston to move to the position of contact with the partition. When the regulating mechanism is not energized, the valve ball is moved to the air inlet by spring force, thereby blocking the air inlet and the moving chamber. At this time, the moving chamber and the pressure relief chamber are connected, thereby releasing the remaining gas in the piston chamber into the low-pressure chamber, causing the piston to move away from the partition.

[0012] Preferably, the adjusting mechanism includes:

[0013] The coil is fixedly mounted on the top of the fixing groove;

[0014] A fixing block is fixedly disposed inside the fixing groove;

[0015] A movable slot is formed on the fixed block;

[0016] The movable block slides within the movable groove, with one end of the movable block penetrating and sliding along the bottom of the fixed block;

[0017] A spring, one end of which is fixedly connected to the top of the movable block, and the other end of which is fixedly connected to the inner wall of the fixing groove;

[0018] A valve ball is fixedly connected to one side of the movable block and is used to control the closing state of the air inlet.

[0019] Preferably, a pressure relief hole is provided at the piston neck position, and a through hole is provided on the side wall of the piston, the through hole connecting the pressure relief hole and the piston cavity.

[0020] Preferably, a sealing ring is fixedly fitted around the piston, and the outer wall of the sealing ring slides tightly against the inner wall of the piston cavity.

[0021] Preferably, the bottom surface of the piston is provided with an installation groove, and an expansion block is fixedly installed inside the installation groove. The expansion block is fitted to the partition plate, and the shape of the expansion block is the same as the cross-sectional shape of the partition plate and the same height. It is used to control the on / off state between the high-pressure chamber and the low-pressure chamber. The installation grooves on both sides of the expansion block are connected to the high-pressure chamber and the low-pressure chamber.

[0022] Preferably, an air inlet pipe is connected to the high-pressure chamber, and the other end of the air inlet pipe is connected to the air inlet hole, so that the high-pressure gas inside the high-pressure chamber can be transported to the pressure relief chamber through the air inlet hole.

[0023] (III) Beneficial Effects

[0024] Compared with the prior art, this utility model provides an energy regulating device for a screw compressor, which has the following beneficial effects:

[0025] 1. This energy regulating device for a screw compressor divides the cavity into a high-pressure chamber and a low-pressure chamber by setting a partition inside the housing. A piston chamber is opened near the partition, allowing the high-pressure chamber and the low-pressure chamber to communicate through the piston chamber. Simultaneously, the sliding of the piston within the piston chamber achieves the function of separating the high-pressure chamber and the low-pressure chamber when the piston is in contact with the partition, and connecting them for pressure relief when the piston moves away from the partition. This achieves the effect of flexibly adjusting the energy output of the screw compressor according to actual operating conditions. When the compressor load is low, the piston moves away from the partition, and the high-pressure chamber and the low-pressure chamber communicate to relieve pressure, avoiding excessive wasted work during compression and reducing energy consumption. When the load increases, the piston contacts the partition, separating the two chambers, ensuring the compressor compresses gas normally and efficiently, effectively improving the compressor's operating efficiency, adapting to different operating conditions, reducing energy waste, and improving equipment economy.

[0026] 2. This energy regulation device for a screw compressor features a movable chamber, a pressure relief chamber, and a fixed groove on its housing. A pressure relief seat connects the movable chamber and the pressure relief chamber, and a vent pipe connects the movable chamber and the piston chamber. An adjustment mechanism controls a valve ball within the movable chamber, allowing for precise control of the high-pressure gas flow direction based on whether the adjustment mechanism is energized, thereby controlling the piston position. This achieves automated and intelligent energy regulation of the compressor. When the adjustment mechanism is energized, the magnetically controlled valve ball seals the movable chamber and the pressure relief chamber, allowing high-pressure gas to enter the piston chamber and cause the piston to adhere to the partition, enabling the compressor to operate at full load. When de-energized, the spring force controls the valve ball to seal the inlet port, releasing gas from the piston chamber and causing the piston to move away from the partition to depressurize. The entire process requires no manual intervention and can automatically adjust according to a preset program or external signal, providing rapid response, improving the stability and reliability of compressor operation, and reducing manual maintenance costs and operational risks.

[0027] 3. This energy regulating device for a screw compressor, by opening a pressure relief hole in the piston neck and a through hole in the side wall, with the pressure relief hole and the through hole connected, allows the gas inside the expansion groove to be discharged into the piston chamber through the pressure relief hole and the through hole when the piston neck slides into the expansion groove. Then, the air is discharged from the hole inside the piston chamber into the vent pipe, which facilitates the sliding of the piston. At the same time, an installation groove is opened at the bottom of the piston, and an expansion block with the same cross-sectional shape as the partition is fixedly installed inside the installation groove. When the high pressure chamber and the low pressure chamber squeeze the expansion block, the expansion block can be deformed and further fitted into the partition, ensuring airtightness. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of this utility model.

[0029] Figure 2 This is a schematic cross-sectional view of the structure of this utility model.

[0030] Figure 3 This is an isometric cross-sectional view of the adjustment mechanism of this utility model.

[0031] Figure 4 This is an isometric cross-sectional view of the piston structure of this utility model.

[0032] Figure 5 This is an isometric cross-sectional view of the adjustment mechanism of this utility model from another angle.

[0033] Figure 6 This is a cross-sectional view of the piston structure of this utility model.

[0034] Figure 7 This is an isometric cross-sectional view of the structure of this utility model with some parts removed.

[0035] Figure 8 This is a schematic cross-sectional view of the adjustment mechanism of this utility model.

[0036] Figure 9 This is a schematic diagram of the piston structure of this utility model.

[0037] Figure 10 This is a schematic diagram of the piston structure of this utility model from another angle.

[0038] Figure 11 This is an isometric sectional view of the adjustment mechanism structure of this utility model.

[0039] Figure 12 This is an isometric cross-sectional view of the adjustment mechanism structure of this utility model from another angle.

[0040] In the diagram: 100, housing; 110, partition; 120, screw; 130, high-pressure chamber; 140, low-pressure chamber; 150, intake pipe;

[0041] 200, Expansion groove; 210, Piston chamber; 220, Piston; 230, Pressure relief hole; 240, Through hole; 250, Mounting groove; 260, Expansion block; 270, Sealing ring;

[0042] 300, Fixed groove; 310, Adjusting mechanism; 320, Coil; 330, Fixed block; 340, Moving groove; 350, Spring; 360, Moving block; 370, Valve ball; 380, Gas supply pipe; 390, Vent pipe;

[0043] 400, Pressure relief chamber; 410, Movable chamber; 420, Pressure relief seat; 430, Air inlet. Detailed Implementation

[0044] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0045] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0046] In addition, a fixed connection refers to a connection in which parts or components are fixed and there is no relative movement; a transmission connection refers to a connection in which mechanical motion or torque is transmitted to other working parts through a transmission component; a sliding connection refers to a connection in which two objects are in contact but not fixed and can slide relative to each other; and a rotational connection refers to a connection in which two objects are in contact but not fixed and can rotate relative to each other.

[0047] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0048] Example 1:

[0049] This embodiment provides an energy regulation device for a screw compressor, which has the following technical features.

[0050] Please see Figure 1-12 An energy regulating device for a screw compressor includes a housing 100, the interior of which has a cavity, and an air inlet and an air outlet communicating with the cavity. Two meshing screws 120 are disposed within the cavity.

[0051] A partition 110 is provided on the inner wall of the housing 100. One side wall of the partition 110 is fitted with the screw 120. The cavity is divided into a high-pressure chamber 130 and a low-pressure chamber 140 by the partition 110. A piston chamber 210 is provided on the side of the housing 100 near the partition 110. A telescopic groove 200 is also provided on the piston chamber 210. A piston 220 is slidably arranged inside the piston chamber 210. The neck of the piston 220 is fitted and slidably inside the telescopic groove 200. The high-pressure chamber 130 and the low-pressure chamber 140 are connected through the piston chamber 210. When the piston 220 is fitted with the partition 110, the high-pressure chamber 130 and the low-pressure chamber 140 are separated. When the piston 220 is away from the partition 110, the high-pressure chamber 130 and the low-pressure chamber 140 are connected, thereby relieving pressure between the high-pressure chamber 130 and the low-pressure chamber 140.

[0052] In an optional embodiment, the housing 100 has a movable cavity 410, a pressure relief cavity 400 and a fixed groove 300 arranged in sequence. The movable cavity 410 and the pressure relief cavity 400 are connected through a pressure relief seat 420. The movable cavity 410 is connected to the piston cavity 210 through a connecting vent pipe 390. The pressure relief cavity 400 is connected to the low pressure cavity 140. An air inlet 430 is connected to the high pressure cavity 130. An adjustment mechanism 310 is provided inside the fixed groove 300. The adjustment mechanism 310 is used to control the valve ball 370 located in the movable cavity 410.

[0053] When the regulating mechanism 310 is energized, the magnetic control valve ball 370 moves to the position of the pressure relief seat 420, thereby blocking the movable chamber 410 and the pressure relief chamber 400. At this time, the air inlet 430 is connected to the movable chamber 410, thereby filling the high-pressure gas in the high-pressure chamber 130 into the piston chamber 210, causing the piston 220 to move to the position of contacting the partition 110. When the regulating mechanism 310 is not energized, the spring force controls the valve ball 370 to move to the position of the air inlet 430, thereby blocking the air inlet 430 from the movable chamber 410. At this time, the movable chamber 410 and the pressure relief chamber 400 are connected, thereby releasing the remaining gas in the piston chamber 210 into the low-pressure chamber 140, causing the piston 220 to move away from the partition 110.

[0054] In an optional embodiment, the adjusting mechanism 310 includes:

[0055] Coil 320 is fixedly mounted on the top of the fixing slot 300;

[0056] The fixing block 330 is fixedly installed inside the fixing groove 300;

[0057] The movable slot 340 has a fixed block 330 on it;

[0058] The movable block 360 slides inside the movable groove 340, and one end of the movable block 360 passes through and slides against the bottom of the fixed block 330;

[0059] Spring 350 is fixedly connected at one end to the top of movable block 360 and at the other end to the inner wall of fixed groove 300.

[0060] The valve ball 370 is fixedly connected to one side of the movable block 360 and is used to control the closing state of the air inlet 430.

[0061] It should be noted that there are several regulating mechanisms 310, and the number of regulating mechanisms 310 corresponds to the number of partitions 110. The two regulating mechanisms 310 are connected by an air supply pipe 380, and the two ends of the 380 are respectively connected to two air inlets 430.

[0062] In an optional embodiment, a pressure relief hole 230 is provided at the neck position of the piston 220, and a through hole 240 is provided on the side wall of the piston 220, the through hole 240 connecting the pressure relief hole 230 and the piston chamber 210.

[0063] In an optional embodiment, a sealing ring 270 is fixedly fitted around the piston 220, and the outer wall of the sealing ring 270 slides tightly against the inner wall of the piston cavity 210.

[0064] In an optional embodiment, the bottom surface of the piston 220 is provided with a mounting groove 250, and an expansion block 260 is fixedly disposed inside the mounting groove 250. The expansion block 260 is fitted to the partition 110, and the shape of the expansion block 260 is the same as the cross-sectional shape of the partition 110 and the height is equal. It is used to control the on / off state between the high pressure chamber 130 and the low pressure chamber 140. The mounting grooves 250 on both sides of the expansion block 260 are connected to the high pressure chamber 130 and the low pressure chamber 140.

[0065] In an optional embodiment, an air inlet pipe 150 is connected to the high-pressure chamber 130, and the other end of the air inlet pipe 150 is connected to the air inlet 430, so that the high-pressure gas inside the high-pressure chamber 130 can be transported to the pressure relief chamber 400 through the air inlet 430.

[0066] Working Principle: A temperature sensor is installed at the operating location of the device to transmit temperature information from the operating location to the control center. Two meshing screws 120 are installed inside the cavity of the housing 100. A partition 110 is also fixedly installed inside the housing 100, with its inner wall rotatably fitting against the side wall of the screws 120, dividing the housing 100 into a high-pressure chamber 130 and a low-pressure chamber 140. A piston chamber 210 is formed on the side of the housing 100 away from the screws 120, and a telescopic groove 200 is formed on the piston chamber 210. The neck of a piston 220 is slidably fitted inside the telescopic groove 200. A piston 220 is slidably mounted inside the piston chamber 210. A piston 220 has a gap between itself and the inner wall of the piston cavity 210. A sealing ring 270 is fixedly installed on the outer wall of the piston 220, and the sealing ring 270 fits against the inner wall of the piston cavity 210. By controlling the sliding position of the piston 220 inside the piston cavity 210, the communication state between the high-pressure cavity 130 and the low-pressure cavity 140 can be changed, thereby changing the pressure difference between the high-pressure cavity 130 and the low-pressure cavity 140. The housing 100 has a movable cavity 410, a pressure relief cavity 400, and a fixing groove 300 arranged in sequence. An adjusting mechanism 310 is fixedly installed inside the fixing groove 300, and a coil 320 is fixedly installed inside the adjusting mechanism 310. The coil 320 is powered by an external power source. When current is applied to coil 320, a magnetic force is generated, which attracts spring 350 and causes it to contract towards coil 320. This, in turn, causes moving block 360 and valve ball 370 to contract into moving groove 340, thus opening the air inlet 430. Simultaneously, the air inlet pipe 150 connects to the high-pressure chamber 130 via the side wall of pressure relief chamber 400. When the temperature sensor detects that the ambient temperature has dropped to a threshold, the current in coil 320 is cut off. Consequently, under the elastic force of spring 350, valve ball 370 blocks air inlet 430. In other words, when regulating mechanism 310 is energized, the magnetic force controls valve ball 370 to move to the pressure relief seat 420, thereby blocking the valve. The moving chamber 410 and the pressure relief chamber 400 are connected. At this time, the air inlet 430 is connected to the moving chamber 410, so that the high-pressure gas in the high-pressure chamber 130 is filled into the piston chamber 210 through the vent pipe 390, causing the piston 220 to move to the position of contacting the partition plate 110. When the regulating mechanism 310 is not energized, the spring 350 controls the valve ball 370 to move to the position of the air inlet 430, thereby blocking the air inlet 430 from the moving chamber 410. At this time, the moving chamber 410 and the pressure relief chamber 400 are connected, thereby releasing the remaining gas in the piston chamber 210 into the low-pressure chamber 140. Under the high pressure of the high-pressure chamber 130, the piston 220 moves away from the partition plate 110, thereby connecting the high-pressure chamber 130 and the low-pressure chamber 140 for pressure relief.Furthermore, a mounting groove 250 is provided on the side of the piston 220 near the partition 110. An expansion block 260 is fixedly installed inside the mounting groove 250. The height of the expansion block 260 is the same as the height of the mounting groove 250, and the shape of the expansion block 260 is the same as the cross-sectional shape of the partition 110. Thus, under the pressure difference between the high-pressure chamber 130 and the low-pressure chamber 140, the expansion block 260 can be compressed, making it fit more closely to the partition 110, ultimately strengthening the airtightness between the high-pressure chamber 130 and the low-pressure chamber 140.

[0067] In summary, this energy regulating device for a screw compressor 120 divides the cavity into a high-pressure chamber 130 and a low-pressure chamber 140 by setting a partition 110 inside the housing 100, and a piston chamber 210 is opened near the partition 110, so that the high-pressure chamber 130 and the low-pressure chamber 140 are connected through the piston chamber 210. At the same time, by utilizing the sliding of the piston 220 in the piston chamber 210, the high-pressure chamber 130 and the low-pressure chamber 140 are separated when the piston 220 is in contact with the partition 110, and connected to each other to relieve pressure when the piston 220 is away from the partition 110. This achieves the effect of flexibly adjusting the energy output of the screw compressor 120 according to actual working conditions. When the compressor load is low, the piston 220 moves away from the partition 110, and the high-pressure chamber 130 and the low-pressure chamber 140 are connected to release pressure, avoiding excessive useless work during compression and reducing energy consumption. When the load increases, the piston 220 is in contact with the partition 110 to separate the two chambers, ensuring that the compressor can compress gas normally and efficiently, effectively improving the compressor's operating efficiency, adapting to different working conditions, reducing energy waste, and improving the economy of the equipment.

[0068] This energy regulating device for a screw compressor 120, by providing a movable chamber 410, a pressure relief chamber 400, and a fixed groove 300 on the housing 100, and connecting the movable chamber 410 and the pressure relief chamber 400 via a pressure relief seat 420, connecting the movable chamber 410 and the piston chamber 210 via a vent pipe 390, and setting an regulating mechanism 310 to control the valve ball 370 in the movable chamber 410, achieves precise control of the high-pressure gas flow direction based on whether the regulating mechanism 310 is energized, thereby controlling the position of the piston 220; achieving the effect of automated and intelligent regulation of compressor energy; when When the regulating mechanism 310 is energized, the magnetic control valve ball 370 blocks the movable chamber 410 and the pressure relief chamber 400, and high-pressure gas fills the piston chamber 210, causing the piston 220 to adhere to the partition 110, and the compressor operates at full load; when not energized, the spring 350 forces the elastic control valve ball 370 to block the air inlet 430, the gas in the piston chamber 210 is released, and the piston 220 moves away from the partition 110 to depressurize; the entire process requires no manual intervention and can be automatically adjusted according to a preset program or external signal, with a rapid response, improving the stability and reliability of compressor operation, and reducing manual maintenance costs and operational risks.

[0069] This energy regulating device for a screw compressor 120, by opening a pressure relief hole 230 in the neck of the piston 220 and a through hole 240 in the side wall, with the pressure relief hole 230 and the through hole 240 connected, allows the gas inside the telescopic groove 200 to be discharged into the piston chamber 210 through the pressure relief hole 230 and the through hole 240 when the neck of the piston 220 slides into the telescopic groove 200. Then, the air is discharged from the hole inside the piston chamber 210 into the vent pipe 390, which facilitates the sliding of the piston 220. At the same time, an installation groove 250 is opened at the bottom of the piston 220, and an expansion block 260 with the same cross-sectional shape as the partition 110 is fixedly installed inside the installation groove 250. When the high pressure chamber 130 and the low pressure chamber 140 squeeze the expansion block 260, the expansion block 260 can be deformed and further fitted into the partition 110, ensuring airtightness.

[0070] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0071] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An energy regulating device for a screw compressor, comprising a housing (100), the housing (100) having an interior cavity, and an air inlet and an air outlet communicating with the cavity, wherein two meshing screws (120) are disposed in the cavity, characterized in that, A partition (110) is provided on the inner wall of the housing (100). One side wall of the partition (110) is fitted to the screw (120). The cavity is divided into a high-pressure chamber (130) and a low-pressure chamber (140) by the partition (110). A piston chamber (210) is provided on the side of the housing (100) near the partition (110). A telescopic groove (200) is also provided on the piston chamber (210). A piston (220) is slidably arranged inside the piston chamber (210). The neck of the piston (220) is fitted to and slides inside the telescopic groove (200). The high-pressure chamber (130) and the low-pressure chamber (140) are connected through the piston chamber (210). When the piston (220) is in contact with the partition (110), the high-pressure chamber (130) and the low-pressure chamber (140) are separated. When the piston (220) is away from the partition (110), the high-pressure chamber (130) and the low-pressure chamber (140) are connected, thereby relieving pressure between the high-pressure chamber (130) and the low-pressure chamber (140).

2. The energy regulating device for a screw compressor according to claim 1, characterized in that, The housing (100) has a movable cavity (410), a pressure relief cavity (400), and a fixed groove (300) arranged in sequence. The movable cavity (410) and the pressure relief cavity (400) are connected by a pressure relief seat (420). The movable cavity (410) is connected to the piston cavity (210) through a connecting vent pipe (390). The pressure relief cavity (400) is connected to the low-pressure cavity (140). An air inlet (430) is connected to the movable cavity (410). The air inlet (430) is connected to the high-pressure cavity (130). An adjustment mechanism (310) is provided inside the fixed groove (300). The adjustment mechanism (310) is used to control the valve ball (370) located in the movable cavity (410). When the regulating mechanism (310) is energized, the valve ball (370) is moved to the position of the pressure relief seat (420) by magnetic control, thereby blocking the active chamber (410) and the pressure relief chamber (400). At this time, the air inlet (430) is connected to the active chamber (410), thereby filling the high-pressure gas in the high-pressure chamber (130) into the piston chamber (210), causing the piston (220) to move to the position of fitting the partition (110). When the regulating mechanism (310) is not energized, the valve ball (370) is moved to the position of the air inlet (430) by spring force, thereby blocking the air inlet (430) and the active chamber (410). At this time, the active chamber (410) and the pressure relief chamber (400) are connected, thereby releasing the remaining gas in the piston chamber (210) into the low-pressure chamber (140), causing the piston (220) to move away from the partition (110).

3. The energy regulating device for a screw compressor according to claim 2, characterized in that, The adjustment mechanism (310) includes: The coil (320) is fixedly disposed on the top of the fixing groove (300); A fixing block (330) is fixedly disposed inside the fixing groove (300); A movable slot (340) is provided on the fixed block (330); The movable block (360) slides inside the movable groove (340), and one end of the movable block (360) passes through and slides on the bottom of the fixed block (330); The spring (350) is fixedly connected at one end to the top of the movable block (360) and at the other end to the inner wall of the fixing groove (300). A valve ball (370) is fixedly connected to one side of the movable block (360) and is used to control the closing state of the air inlet (430).

4. The energy regulating device for a screw compressor according to claim 1, characterized in that, The piston (220) has a pressure relief hole (230) at its neck position and a through hole (240) on its side wall. The through hole (240) connects the pressure relief hole (230) with the piston chamber (210).

5. The energy regulating device for a screw compressor according to claim 1, characterized in that, A sealing ring (270) is fixedly fitted around the piston (220), and the outer wall of the sealing ring (270) slides tightly against the inner wall of the piston cavity (210).

6. The energy regulating device for a screw compressor according to claim 1, characterized in that, The piston (220) has a mounting groove (250) on its bottom surface. An expansion block (260) is fixedly installed inside the mounting groove (250). The expansion block (260) fits against the partition (110). The shape of the expansion block (260) is the same as the shape of the cross-section of the partition (110) and the height is equal. It is used to control the on / off state between the high pressure chamber (130) and the low pressure chamber (140). The mounting grooves (250) on both sides of the expansion block (260) are connected to the high pressure chamber (130) and the low pressure chamber (140).

7. An energy regulating device for a screw compressor according to claim 2, characterized in that, An air inlet pipe (150) is connected to the high-pressure chamber (130), and the other end of the air inlet pipe (150) is connected to the air inlet (430), so that the high-pressure gas inside the high-pressure chamber (130) can be transported to the pressure relief chamber (400) through the air inlet (430).

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