Energy-saving centrifugal compressor

Abstract

The invention relates to the technical field of air compressors, in particular to an energy-saving centrifugal air compressor which comprises a rack, a shell and a motor, and the shell and the motor are installed on the rack; the wheel disc is concentrically installed on an output shaft of the motor, the wheel disc divides a cavity of the shell into a front portion and a rear portion, the front blades are circumferentially and evenly installed in the front end face of the wheel disc, the rear blades are circumferentially and evenly installed on the outer portion of the rear end face of the wheel disc, and the flow guide cavity is communicated with the flow guide cavity. The plurality of vent holes are arranged between the plurality of front blades and the plurality of rear blades, the front edge of the shell is provided with a flow guide cavity, the side edge of the shell is provided with an air outlet hole, the air outlet hole is communicated with the rear edge of the cavity of the shell, the diffusion pipeline is arranged on the side wall of the shell, and the input end of the diffusion pipeline is connected with the air outlet hole of the shell; through the first-stage impeller and the second-stage impeller which are arranged front and back, the wheel disc is stressed in a balanced mode, and the overall reliability and the energy-saving effect of the gas compressor are improved.

Description

Technical Field

[0001] The invention relates to the technical field of air compressors, and in particular to an energy-saving centrifugal air compressor. Background Art

[0002] When the centrifugal compressor is running, the air is affected by centrifugal force and flows along the blades, causing the air to be compressed. Subsequently, the air flows in the diffuser. As the flow surface continues to expand, the air flow velocity decreases and the pressure increases. Finally, the compressed air is sent to subsequent equipment or systems through the volute.

[0003] Various centrifugal presses have been proposed in the prior art, for example, a centrifugal compressor proposed in a Chinese invention patent application with publication number CN117231561A, which comprises a rotor system fastened inside a casing body; a first centrifugal compression impeller and a second centrifugal compression impeller respectively connected to the rotor system; a first diffuser system, respectively supporting the first end of the rotor system and the first centrifugal compression impeller; a second diffuser system, respectively supporting the second end of the rotor system and the second centrifugal compression impeller; a connecting air duct connecting the first diffuser system and the second diffuser system; the first centrifugal compression impeller and the second centrifugal compression impeller having opposite rotation directions; and the problems of large compressor size, low efficiency and high cost are solved.

[0004] However, the blades of the impellers of existing centrifugal compressors are mostly arranged on the same side of the wheel disc. As a result, the axial reaction force received by the impeller when it moves and accelerates the air pushes the impeller as a whole to the side away from the blades, causing unbalanced force on the drive shaft and bearings that support the impeller and other components, increasing the difficulty of designing the drive shaft and bearings and reducing the reliability of the centrifugal compressor. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides an energy-saving centrifugal compressor which balances the force on the impeller by arranging the first-stage impeller and the second-stage impeller in front and behind, thereby improving the overall reliability and energy-saving effect of the compressor.

[0006] The present invention discloses an energy-saving centrifugal compressor, comprising a frame, a shell and a motor, wherein the shell and the motor are mounted on the frame, a cavity is arranged inside the shell, and an air inlet hole connected to the cavity is arranged in the middle of the front end of the shell; the compressor also comprises a wheel, a plurality of front blades, a plurality of vents, a plurality of rear blades, a guide cavity and a pressure expansion pipe, wherein the wheel is concentrically mounted on the output shaft of the motor, the wheel is located in the middle of the cavity of the shell, and the wheel divides the cavity of the shell into a front part and a rear part, a plurality of front blades are evenly arranged on the circumference of the front end face of the wheel, and a plurality of vents are arranged on the circumference of the middle part of the wheel. The outer circumference of the rear end face of the wheel disc is evenly equipped with a plurality of rear blades, and the plurality of vent holes are arranged between the plurality of front blades and the plurality of rear blades. The front edge of the shell is provided with a guide cavity, and the guide cavity surrounds the outer edge of the plurality of vent holes. The guide cavity guides the air flowing along the plurality of front blades to the plurality of vent holes. The side edge of the shell is provided with an air outlet hole, and the air outlet hole is connected with the rear edge of the cavity of the shell. The pressure expansion pipe is installed on the side wall of the shell, and the input end of the pressure expansion pipe is connected with the air outlet hole of the shell. When working, the motor drives the wheel disc to rotate, and the wheel disc drives the plurality of front blades to rotate. The blades and multiple rear blades rotate, and the air enters the front part of the cavity through the air inlet of the shell. The rotating multiple front blades accelerate the air in the first stage and push it to the edge of the front part of the cavity of the shell. The guide cavity guides the air accelerated in the first stage to the multiple vents, so that the air accelerated in the first stage enters the rear part of the cavity of the shell through the multiple vents. Since the multiple rear blades are located outside the multiple front blades, the linear velocity of the multiple rear blades is greater than the linear velocity of the front blades, so that the rotating multiple rear blades accelerate the air accelerated in the first stage for the second time, and the air accelerated by the second time enters the expansion pipe through the air outlet of the shell. The air accelerated in the second time flows in the expansion pipe and is expanded and output. By arranging the first-stage acceleration impeller and the second-stage acceleration impeller on the front end face and the rear end face of the wheel respectively, the wheel is balanced in front and back forces when driving the air, so that the driving shaft and the bearing are balanced in force, the friction of the bearing assembly of the impeller is reduced, so as to be more energy-saving, reduce the design difficulty of components such as the driving shaft and the bearing, improve the reliability of the centrifugal compressor, and realize the second-stage acceleration of the air, and increase the outlet pressure.

[0007] Preferably, it also includes multiple short blades, which are installed on the front end surface of the wheel disc, and are respectively located between multiple front blades. The length of the short blades is shorter than the length of the front blades; multiple shorter short blades are installed between the multiple front blades to improve the acceleration and compression efficiency of the air.

[0008] Preferably, outer ends of the plurality of short blades and outer ends of the plurality of front blades are located on the same circumference.

[0009] Preferably, the inner ends of the plurality of short blades and the inner ends of the plurality of front blades are located on the same circumference.

[0010] Preferably, it also includes multiple rounded corners, and rounded corners are set between multiple front blades and the wheel disc. The rounded corners gradually thicken along the air flow direction and eventually fill the corner area. By setting multiple rounded corners to reduce the right-angle area formed between the front blades and the wheel disc, the separation of the corner area can be effectively reduced and the efficiency can be improved.

[0011] Preferably, it also includes an air guide ring, which is concentrically installed on the front end surface of the wheel disc, and is connected to the outer ends of multiple front blades. The outer edge of the air guide ring and the guide cavity form an air collecting chamber, and the air guide ring guides the air toward the outside front into the air collecting chamber; the air accelerated by the multiple front blades is guided toward the outside front into the air collecting chamber by the air guide ring, so that the air accelerated by the first stage is gathered in the air collecting chamber and is more easily entered into the rear part of the cavity of the shell through multiple air vents.

[0012] Preferably, it also includes multiple compressor blades, which are circumferentially installed on the front end surface of the wheel disc, are inclined, are located on the outside of the air guide ring, and are located on the inside of the guide cavity; the wheel disc drives the multiple compressor blades to rotate, and the compression effect of the inclined multiple compressor blades pushes the air gathered in the air collecting chamber backwards through the multiple air vents, thereby improving the efficiency of the air backward transportation.

[0013] Preferably, it also includes a conical nut, the front end of which is conical, and the conical nut is rotatably threaded on the end of the output shaft of the motor, and the conical nut locks the wheel on the output shaft of the motor; the conical front end of the conical nut guides the air entering the cavity of the shell to the surrounding area, thereby improving the air intake efficiency.

[0014] Preferably, it also includes a gate plate, an arm and a push rod, the outer end of the gate plate is rotatably installed inside the input end of the diffuser pipe through an axle, the inner end of the gate plate faces the air outlet of the shell, one end of the arm is connected to the outer end of the axle of the gate plate, one end of the push rod is rotatably connected to the other end of the arm, and the other end of the push rod is rotatably connected to the diffuser pipe; the piston rod of the push rod is telescopically driven to drive the gate plate to rotate through the arm, so that the gate plate opens and closes the input end of the diffuser pipe, and can adjust the size of the opening of the diffuser pipe to achieve regulation of the outlet air flow, which has good practicality.

[0015] Preferably, it also includes an air supply pipe, a sleeve, a gear ring, an air supply motor and a gear. A mounting opening is provided at the rear center of the shell, the air supply pipe is concentrically installed in the mounting opening of the shell, the inner end of the air supply pipe is in sliding and sealing contact with the rear end surface of the wheel disc, an air inlet hole 2 is provided on the side wall of the air supply pipe, a thread 1 is provided on the inner wall of the air supply pipe, a thread 2 is provided on the outer wall of the sleeve, the sleeve is rotatably screwed in the air supply pipe, a gear ring is concentrically installed on the outer end of the sleeve, the gear ring is located behind the air supply pipe, the air supply motor is installed on the rear side wall of the shell, and a gear is concentrically installed on the output shaft of the air supply motor, and the gear is meshed with the gear ring; the air supply motor drives the gear to rotate, and the gear meshes with the gear ring to drive the sleeve to rotate, and the thread 1 and the thread 2 between the sleeve and the air supply pipe make the sleeve move back and forth along the axis of the air supply pipe, so that the sleeve opens or closes the air inlet hole 2 of the air supply pipe, and adjusts the opening size of the air inlet hole 2, so that the outside air can supplement the air to the rear of the cavity of the shell through the air inlet hole 2 of the air supply pipe, thereby realizing the regulation of the air intake amount.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: when working, the motor drives the wheel disc to rotate, and the wheel disc drives the multiple front blades and the multiple rear blades to rotate, and the air enters the front part of the cavity through the air inlet of the shell, and the rotating multiple front blades accelerate the air and push it toward the edge of the front part of the cavity of the shell, and the guide cavity guides the air accelerated by the first stage to the multiple vents, so that the air accelerated by the first stage enters the rear part of the cavity of the shell through the multiple vents, and because the multiple rear blades are located outside the multiple front blades, the linear speed of the multiple rear blades is greater than the linear speed of the front blades, so that the rotating multiple rear blades accelerate the air by the first stage to the multiple vents. The air accelerated by the first stage is accelerated by the second stage, and the air accelerated by the second stage enters the diffuser duct through the air outlet of the shell. The air accelerated by the second stage flows in the diffuser duct and is diffused and output. By arranging the first stage acceleration impeller and the second stage acceleration impeller on the front end face and the rear end face of the wheel respectively, the wheel is subjected to balanced front and rear forces when driving the air, thereby balancing the forces on the drive shaft and the bearing, reducing the friction of the impeller's bearing components, thereby being more energy-efficient, reducing the design difficulty of components such as the drive shaft and the bearing, improving the reliability of the centrifugal compressor, realizing the second stage acceleration of the air, and increasing the outlet pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention;

[0018] Figure 2 It is a front cross-sectional structural schematic diagram of the present invention;

[0019] Figure 3 It is a schematic diagram of the rear cross-sectional structure of the present invention;

[0020] Figure 4 is a rear axonometric schematic diagram of the present invention;

[0021] Figure 5It is a schematic diagram of the axonometric structure of the present invention;

[0022] Figure 6 The rear axonometric exploded state structure of the present invention is schematically shown. Figure 1 ;

[0023] Figure 7 The rear axonometric exploded state structure of the present invention is schematically shown. Figure 2 ;

[0024] Figure 8 is an axonometric structural diagram of the wheel disc, front blades, vent holes and other structures in Example 1;

[0025] Fig. 9 is a front view structural diagram of the wheel disc, front blades, vent holes and other structures in Example 1;

[0026] Fig.10 is a front view structural diagram of the wheel disc, front blades, vent holes and other structures in Example 2;

[0027] Fig.11 It is a schematic structural diagram of the wheel disc, vent holes, rear blades and other structures of the present invention.

[0028] Markings in the attached drawings: 1. frame; 2. shell; 3. motor; 4. wheel; 5. front blade; 6. vent; 7. rear blade; 8. guide chamber; 9. expansion pipe; 10. short blade; 11. fillet; 12. air guide ring; 13. compressor blade; 14. tapered nut; 15. gate; 16. arm; 17. push rod; 18. air supply pipe; 19. sleeve; 20. gear ring; 21. air supply motor; 22. gear. DETAILED DESCRIPTION

[0029] In order to facilitate understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0030] Example 1

[0031] like Figures 1 to 9 and Fig.11As shown, an energy-saving centrifugal compressor includes a frame 1, a shell 2 and a motor 3, the shell 2 and the motor 3 are installed on the frame 1, a cavity is arranged inside the shell 2, and an air inlet hole connected to the cavity is arranged in the middle of the front end of the shell 2; it also includes a wheel 4, a plurality of front blades 5, a plurality of vents 6, a plurality of rear blades 7, a guide cavity 8 and a pressure expansion pipe 9, the wheel 4 is concentrically installed on the output shaft of the motor 3, the wheel 4 is located in the middle of the cavity of the shell 2, the wheel 4 divides the cavity of the shell 2 into a front part and a rear part, a plurality of front blades 5 are evenly arranged on the circumference of the front end surface of the wheel 4, and the middle of the wheel 4 A plurality of vent holes 6 are arranged on the circumference of the shell 2, a plurality of rear blades 7 are evenly installed on the outer circumference of the rear end surface of the wheel disc 4, and the plurality of vent holes 6 are arranged between the plurality of front blades 5 and the plurality of rear blades 7. A guide cavity 8 is arranged on the front edge of the shell 2, and the guide cavity 8 surrounds the outer edge of the plurality of vent holes 6. The guide cavity 8 guides the air flowing along the plurality of front blades 5 to the plurality of vent holes 6. An air outlet is arranged on the side edge of the shell 2, and the air outlet is communicated with the rear edge of the cavity of the shell 2. A pressure diffuser pipe 9 is installed on the side wall of the shell 2, and the input end of the pressure diffuser pipe 9 is connected to the air outlet of the shell 2. It also includes a plurality of short blades 10, a plurality of short blades 10 are installed on the front end surface of the wheel disc 4, the plurality of short blades 10 are respectively located between the plurality of front blades 5, and the length of the short blades 10 is less than the length of the front blades 5; the outer ends of the plurality of short blades 10 and the outer ends of the plurality of front blades 5 are on the same circumference; it also includes a plurality of fillets 11, a fillet 11 is arranged between the plurality of front blades 5 and the wheel disc 4, the fillet 11 gradually thickens along the air flow direction, and finally fills the corner area; it also includes an air guide ring 12, the air guide ring 12 is concentrically installed on the front end surface of the wheel disc 4, the air guide ring 12 is connected to the outer ends of the plurality of front blades 5, and the air guide ring The outer edge of 12 forms an air collecting chamber with the guide cavity 8, and the air guide ring 12 guides the air to the outside forward into the air collecting chamber; it also includes a plurality of compressor blades 13, and the plurality of compressor blades 13 are circumferentially installed on the front end surface of the wheel disc 4, and the plurality of compressor blades 13 are inclinedly arranged, and the plurality of compressor blades 13 are located on the outside of the air guide ring 12, and the plurality of compressor blades 13 are located on the inside of the guide cavity 8; it also includes a conical nut 14, the front end of the conical nut 14 is conical, and the conical nut 14 is rotatably screwed on the end of the output shaft of the motor 3, and the conical nut 14 locks the wheel disc 4 on the output shaft of the motor 3.

[0032] During operation, the motor 3 drives the wheel disc 4 to rotate, and the wheel disc 4 drives the multiple front blades 5 and the multiple rear blades 7 to rotate, and the air enters the front part of the cavity through the air inlet of the shell 2. The conical front end of the conical nut 14 guides the air entering the cavity of the shell 2 to the surrounding, and the rotating multiple front blades 5 accelerate the air and push it to the edge of the front part of the cavity of the shell 2. The air accelerated by the multiple front blades 5 is guided to the front outside by the air guide ring 12 into the air collecting chamber, so that the air accelerated by the first stage is gathered in the air collecting chamber, and the guide chamber 8 guides the air accelerated by the first stage to the multiple vents 6. The wheel disc 4 drives the multiple compressor blades 13 to rotate, and the compression effect of the inclined multiple compressor blades 13 pushes the air gathered in the air collecting chamber backward through the multiple vents 6, so that the air accelerated by the first stage enters the air collecting chamber through the multiple vents 6. The plurality of rear blades 7 are inserted into the rear part of the cavity of the shell 2. Since the plurality of rear blades 7 are located on the outside of the plurality of front blades 5, the linear velocity of the plurality of rear blades 7 is greater than the linear velocity of the front blades 5, so that the rotating plurality of rear blades 7 perform secondary acceleration on the air accelerated at the primary stage. The air accelerated at the secondary stage enters the diffuser 9 through the air outlet of the shell 2. The air accelerated at the secondary stage flows in the diffuser 9 and is diffused and output. By respectively arranging a primary acceleration impeller and a secondary acceleration impeller on the front end face and the rear end face of the wheel disc 4, the wheel disc 4 is subjected to balanced front and rear forces when driving the air, thereby balancing the forces on the drive shaft and the bearings, reducing the friction of the bearing components of the impeller, thereby being more energy-efficient, reducing the design difficulty of components such as the drive shaft and the bearings, improving the reliability of the centrifugal compressor, realizing secondary acceleration of the air, and increasing the outlet pressure.

[0033] By installing a plurality of shorter blades 10 between a plurality of front blades 5, the efficiency of accelerating and compressing air is improved.

[0034] By providing a plurality of rounded corners 11 to reduce the right angle area formed between the front blade 5 and the wheel disc 4, the angular area separation can be effectively reduced and the efficiency can be improved.

[0035] Example 2

[0036] like Figures 1 to 7 , Fig.10 and Fig.11 As shown, what is different from the first embodiment is that the inner ends of the plurality of short blades 10 and the inner ends of the plurality of front blades 5 are located on the same circumference.

[0037] Example 3

[0038] like Figures 1 to 7As shown, on the basis of embodiments 1 and 2, it also includes a gate 15, an arm 16 and a push rod 17. The outer end of the gate 15 is rotatably mounted inside the input end of the diffuser pipe 9 through a shaft, and the inner end of the gate 15 faces the air outlet of the shell 2. One end of the arm 16 is connected to the outer end of the shaft of the gate 15, and one end of the push rod 17 is rotatably connected to the other end of the arm 16, and the other end of the push rod 17 is rotatably connected to the diffuser pipe 9; it also includes an air supply pipe 18, a sleeve 19, a gear ring 20, an air supply motor 21 and a gear 22, and a mounting port is set at the rear center of the shell 2. The air supply pipe 18 is concentrically installed in the installation opening of the shell 2, the inner end of the air supply pipe 18 is in sliding sealing contact with the rear end surface of the wheel disc 4, the side wall of the air supply pipe 18 is provided with an air inlet hole 2, the inner wall of the air supply pipe 18 is provided with a thread 1, the outer wall of the sleeve 19 is provided with a thread 2, the sleeve 19 is rotatably screwed in the air supply pipe 18, the outer end of the sleeve 19 is concentrically installed with a gear ring 20, the gear ring 20 is located behind the air supply pipe 18, the air supply motor 21 is installed on the rear side wall of the shell 2, and the output shaft of the air supply motor 21 is concentrically installed with a gear 22, and the gear 22 is meshed with the gear ring 20.

[0039] The piston rod of the push rod 17 is extended and retracted to drive the gate plate 15 to rotate through the arm rod 16, so that the gate plate 15 opens and closes the input end of the diffuser pipe 9, and can adjust the size of the opening of the diffuser pipe 9 to achieve the regulation of the outlet air flow rate. The air supply motor 21 drives the gear 22 to rotate, and the gear 22 engages the ring gear 20 to drive the sleeve 19 to rotate. The thread one and the thread two between the sleeve 19 and the air supply pipe 18 make the sleeve 19 move back and forth along the axis of the air supply pipe 18, so that the sleeve 19 opens or closes the air inlet hole 2 of the air supply pipe 18, and adjusts the opening size of the air inlet hole 2, so that the outside air can be supplied to the rear of the cavity of the shell 2 through the air inlet hole 2 of the air supply pipe 18, thereby achieving the regulation of the air intake volume.

[0040] like Figures 1 to 11As shown, an energy-saving centrifugal compressor of the present invention, when working, firstly, the motor 3 drives the wheel disc 4 to rotate, and the wheel disc 4 drives the multiple front blades 5, the multiple rear blades 7 and the multiple compressor blades 13 to rotate, and the air enters the front part of the cavity through the air inlet hole of the shell 2, and the rotating multiple front blades 5 accelerate the air in the first stage and push it to the edge of the front part of the cavity of the shell 2, and then the air accelerated in the first stage is guided to the front outside by the air guide ring 12 and enters the air collecting chamber, and the guide cavity 8 guides the air accelerated in the first stage to the multiple air vents 6, and the compression effect of the inclined multiple compressor blades 13 pushes the air gathered in the air collecting chamber backward through the multiple air vents 6 to enter the rear part of the cavity of the shell 2, and then because the multiple rear blades 7 are located on the outside of the multiple front blades 5, the linear velocity of the multiple rear blades 7 is greater than the linear velocity of the front blades 5. The rotating multiple rear blades 7 accelerate the air accelerated at the first level to the second level, and the air accelerated at the second level enters the diffuser pipe 9 through the air outlet of the shell 2. At the same time, the air supply motor 21 drives the gear 22 to rotate, and the gear 22 engages the gear ring 20 to drive the sleeve 19 to rotate. The thread one and the thread two between the sleeve 19 and the air supply pipe 18 make the sleeve 19 move back and forth along the axis of the air supply pipe 18, so that the sleeve 19 adjusts the opening size of the air inlet hole 2 of the air supply pipe 18, so that the outside air replenishes the air to the rear part of the cavity of the shell 2 through the air inlet hole 2 of the air supply pipe 18. Finally, the piston rod of the push rod 17 is telescopically extended and drives the gate plate 15 to rotate to adjust the opening size of the diffuser pipe 9 through the arm 16, so as to adjust the outlet air flow rate. The air accelerated at the second level flows in the diffuser pipe 9 and is diffused and output.

[0041] The main functions achieved by the present invention are:

[0042] 1. By arranging a first-stage accelerating impeller and a second-stage accelerating impeller on the front and rear surfaces of the impeller 4, the front and rear forces of the impeller 4 are balanced, so that the forces on the drive shaft and the bearing are balanced, the friction of the bearing components of the impeller is reduced, and the reliability of the centrifugal compressor is improved;

[0043] 2. Reduce the friction of the impeller's bearing components, which is more energy-efficient;

[0044] 3. The air is accelerated in two stages to increase the outlet pressure;

[0045] 4. Able to adjust the air outlet size;

[0046] 5. It has the function of replenishing air, which improves the flexibility of air intake;

[0047] 6. Design thickened fillets along the flow direction to fill the corners, which can effectively reduce corner separation and improve efficiency;

[0048] 7. Use a long and short blade design to improve compression efficiency.

[0049] The energy-saving centrifugal compressor of the present invention has an installation method, a connection method or a setting method that are all common mechanical methods, and any method that can achieve its beneficial effects can be implemented; the frame 1, the shell 2, the motor 3, the wheel 4, the front blades 5, the rear blades 7, the diffuser pipe 9, the short blades 10, the compression blades 13, the tapered nut 14, the push rod 17, the gear ring 20, the air supply motor 21, and the gear 22 of the energy-saving centrifugal compressor of the present invention are purchased on the market, and technicians in the industry only need to install and operate them according to the accompanying instruction manual, without the need for creative labor by technicians in this field.

[0050] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An energy-saving centrifugal compressor, comprising a frame (1), a shell (2) and a motor (3), wherein the shell (2) and the motor (3) are mounted on the frame (1), a cavity is arranged inside the shell (2), and an air inlet hole communicating with the cavity is arranged at the middle of the front end of the shell (2); characterized in that: The invention also comprises a wheel disc (4), a plurality of front blades (5), a plurality of vent holes (6), a plurality of rear blades (7), a flow guide cavity (8) and a pressure diffuser pipe (9), wherein the wheel disc (4) is concentrically mounted on the output shaft of the motor (3), the wheel disc (4) is located in the middle of the cavity of the housing (2), the wheel disc (4) divides the cavity of the housing (2) into a front part and a rear part, a plurality of front blades (5) are evenly mounted on the circumference of the front end face of the wheel disc (4), a plurality of vent holes (6) are arranged on the circumference of the middle part of the wheel disc (4), and a plurality of rear blades (7) are evenly mounted on the circumference of the rear end face of the wheel disc (4). 7), a plurality of vents (6) are arranged between a plurality of front blades (5) and a plurality of rear blades (7), a guide cavity (8) is arranged at the front edge of the shell (2), the guide cavity (8) surrounds the outer edges of the plurality of vents (6), the guide cavity (8) guides the air flowing along the plurality of front blades (5) to the plurality of vents (6), an air outlet is arranged at the side edge of the shell (2), the air outlet is communicated with the rear edge of the cavity of the shell (2), a pressure diffuser pipe (9) is installed on the side wall of the shell (2), and the input end of the pressure diffuser pipe (9) is connected to the air outlet of the shell (2).

2. An energy-saving centrifugal compressor according to claim 1, characterized in that: It also comprises a plurality of short blades (10), which are mounted on the front end surface of the wheel disc (4), and the plurality of short blades (10) are respectively located between the plurality of front blades (5), and the length of the short blades (10) is less than the length of the front blades (5).

3. An energy-saving centrifugal compressor as claimed in claim 2, characterized in that: The outer ends of the plurality of short blades (10) and the outer ends of the plurality of front blades (5) are located on the same circumference.

4. An energy-saving centrifugal compressor as claimed in claim 2, characterized in that: The inner ends of the plurality of short blades (10) and the inner ends of the plurality of front blades (5) are located on the same circumference.

5. The energy-saving centrifugal compressor according to claim 1, characterized in that: It also includes a plurality of fillets (11), wherein the fillets (11) are arranged between the plurality of front blades (5) and the wheel disc (4), and the fillets (11) gradually thicken along the air flow direction and eventually fill the corner area.

6. The energy-saving centrifugal compressor according to claim 1, characterized in that: It also includes an air guide ring (12), which is concentrically mounted on the front end surface of the wheel disc (4), the air guide ring (12) is connected to the outer ends of the plurality of front blades (5), the outer edge of the air guide ring (12) and the guide cavity (8) form an air collecting chamber, and the air guide ring (12) guides air to the outside in the front and enters the air collecting chamber.

7. An energy-saving centrifugal compressor as claimed in claim 6, characterized in that: It also includes a plurality of compressor blades (13), which are circumferentially mounted on the front end surface of the wheel disc (4), are inclinedly arranged, are located outside the air guide ring (12), and are located inside the flow guide cavity (8).

8. The energy-saving centrifugal compressor according to claim 1, characterized in that: The conical nut (14) also includes a conical front end, the conical nut (14) is rotatably screwed on the end of the output shaft of the motor (3), and the conical nut (14) locks the wheel disc (4) on the output shaft of the motor (3).

9. The energy-saving centrifugal compressor according to claim 1, characterized in that: It also includes a gate plate (15), an arm (16) and a push rod (17), wherein the outer end of the gate plate (15) is rotatably mounted inside the input end of the diffuser pipe (9) via an axial rod, the inner end of the gate plate (15) faces the air outlet of the shell (2), one end of the arm (16) is connected to the outer end of the axial rod of the gate plate (15), one end of the push rod (17) is rotatably connected to the other end of the arm (16), and the other end of the push rod (17) is rotatably connected to the diffuser pipe (9).

10. The energy-saving centrifugal compressor according to claim 1, characterized in that: The invention also comprises an air supply pipe (18), a sleeve (19), a gear ring (20), an air supply motor (21) and a gear (22). A mounting opening is arranged at the rear center of the housing (2). The air supply pipe (18) is coaxially mounted in the mounting opening of the housing (2). The inner end of the air supply pipe (18) is in sliding sealing contact with the rear end surface of the wheel disc (4). Two air inlet holes are arranged on the side wall of the air supply pipe (18). One thread is arranged on the inner wall of the air supply pipe (18). Two threads are arranged on the outer wall of the sleeve (19). The sleeve (19) is rotatably screwed in the air supply pipe (18). The gear ring (20) is coaxially mounted on the outer end of the sleeve (19). The gear ring (20) is located behind the air supply pipe (18). The air supply motor (21) is mounted on the rear side wall of the housing (2). The output shaft of the air supply motor (21) is coaxially mounted with a gear (22). The gear (22) meshes with the gear ring (20).

Images