CN116379013A

CN116379013A - MVR centrifugal vapor compressor intake anti-surge pipe

Info

Publication number: CN116379013A
Application number: CN202310443331.1A
Authority: CN
Inventors: 翟官正
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-04-24
Filing date: 2023-04-24
Publication date: 2023-07-04

Abstract

The invention discloses an air inlet anti-surge pipe of an MVR centrifugal steam compressor, which belongs to the technical field of steam compressors and comprises an air suction assembly, an air inlet assembly and a pressure stabilizing mechanism, wherein the air suction assembly comprises a shell, a turbine and a rotating shaft, the shell is provided with an exhaust pipe and an air inlet, the exhaust pipe is communicated with the outside, the turbine is arranged in the shell, the turbine is fixedly arranged at the end part of the rotating shaft extending into the shell, the air inlet assembly comprises an air inlet cover and an impeller, the impeller is arranged in the air inlet cover in a rotating way, the air inlet cover is arranged on the air inlet, the pressure stabilizing mechanism comprises a cylinder body and a core body structure, the core body structure moves along the axis of the cylinder body, and the communication between the exhaust pipe and the air inlet is realized through the offset of the core body structure. According to the invention, the rotating turbine pushes air in the shell to be discharged through the exhaust pipe, and as the air pressure in the exhaust pipe is reduced, the air outside enters the shell through the air inlet, so that the air pressure balance between the air inlet and the air pressure in the exhaust pipe is maintained.

Description

MVR centrifugal vapor compressor intake anti-surge pipe

Technical Field

The invention relates to the field of vapor compressors, in particular to an air inlet anti-surge pipe of an MVR centrifugal vapor compressor.

Background

During operation of the centrifugal compressor, there may be a phenomenon that when the load is lower than a certain value, normal gas delivery is destroyed, the discharge amount of gas is more and less, the gas is neglected, strong vibration occurs, and noise like "wheezing" of asthmatic patients is generated. At this time, the indication of the gas outlet pressure gauge and the flow gauge can be seen to fluctuate greatly. The machine body can vibrate severely and drive the outlet pipeline and the factory building to vibrate, and the compressor can make periodic intermittent roar, if measures are not taken timely, the compressor can be seriously damaged, for example, the compressor components, the sealing rings, the bearings, the impellers, the pipelines and other devices and components are damaged.

Disclosure of Invention

In order to solve the technical problems, the invention provides an air inlet anti-surge pipe of an MVR centrifugal steam compressor, which comprises a shell, wherein the bottom of the shell is connected with a support convenient to install, and the air inlet pipe further comprises an air suction assembly, an air inlet assembly and a pressure stabilizing mechanism;

the utility model provides a gas-absorbing assembly, including casing, turbine and axis of rotation, the casing has blast pipe and air inlet, blast pipe and outside intercommunication, be equipped with the turbine in the casing, turbine fixed mounting stretches into on the tip of casing at the axis of rotation, the subassembly that admits air includes inlet hood and impeller, inlet hood internally mounted has the impeller, the inlet hood is installed on the air inlet, and steady voltage mechanism includes barrel and core structure, installs the core structure along its axis motion in the barrel, realizes the intercommunication between blast pipe and the air inlet through the skew of core structure.

Further, the inlet end of inlet hood is equipped with the bulge loop of outside expansion, the connector has been seted up on the lateral surface of bulge loop, the connector passes through exhaust passage and barrel intercommunication, the impeller main part is the body, one side has seted up the annular on the lateral surface of body, has cup jointed the spacing ring on the annular and has cooperated and install in the inlet hood, the opposite side is equipped with along the body on the lateral surface of body, the inboard along body, body and bulge loop forms annular cavity, the outside of body is equipped with outer blade, outer blade is located annular cavity, it has a plurality of through-hole to run through on the body, and annular cavity passes through the through-hole and communicates with the body is inside.

Further, an outer blade is arranged on the outer side of the pipe body, and the outer blade is located in the annular cavity.

Further, round holes are formed in two opposite side faces of the shell in a penetrating mode, the round holes in one side face are sealed through the sealing cover, and one end of the rotating shaft penetrates through the sealing cover to be fixedly connected with the turbine.

Further, openings are formed in two ends of the cylinder, the port of the cylinder is closed through the end cover, a first connecting end and a second connecting end are formed in the side face of the cylinder, the first connecting end is communicated with the exhaust pipe through the air outlet pipe, and the second connecting end is communicated with the annular cavity through the exhaust channel and the connecting port.

Further, the core structure includes sleeve pipe and pipe, the sleeve pipe is fixed at the inboard middle part of barrel, and first link and the link that is equipped with simultaneously are located the sheathed tube both sides, set up flutedly on the sheathed tube inner wall, set up annular groove on the lateral surface of pipe, sheathed tube length is the same with the length of pipe, the pipe is installed in the sleeve pipe in complete cooperation, the cavity intercommunication of sleeve pipe both sides is realized to the realization of pipe's one end extension sleeve pipe, connect through the constant voltage mechanism intercommunication between connector and the outlet duct, thereby the link of constant voltage mechanism is through connecting port and annular cavity inside intercommunication, along with the inside air discharge of annular cavity, thereby the atmospheric pressure reduces, thereby realize the right side cavity atmospheric pressure of constant voltage mechanism as shown in fig. 6, if the atmospheric pressure of air inlet is being less than the atmospheric pressure of outlet duct, along with the pressure difference increase of constant voltage mechanism left and right sides cavity, promote the inside gas inlet right side cavity of installation, and enter into the right side cavity, and enter into the inside effectual relief gas pressure difference of casing, along with the reduction of gas pressure difference, guarantee the direct transportation that the gas reset of pipe.

Further, one end of the guide pipe extends out of the sleeve to realize cavity communication at two sides of the sleeve, and air flows to one side.

Further, a plurality of sliding grooves are formed in the inner wall of the sleeve, a plurality of convex edges are arranged on the outer side face of the guide pipe, and the sliding grooves correspond to the convex edges one by one.

Further, the prism hole has all been seted up at the both ends of pipe, the bottom surface in prism hole is equipped with the through hole, install the mounting on the end cover, the prism that mounting one side was equipped with stretches into in the prism hole, the nut has been placed to the bottom in prism hole, installs the spring between nut and the prism terminal surface, placed the screw rod in the through hole, the nut cooperation is installed on the screw rod, and the screw thread of the nut that is located different prism holes revolves to opposite, rotates the screw rod and realizes that two nuts are close to each other or keep away from each other, realizes compressing the spring through forward rotation screw rod to need bigger power to realize spring deformation, realize drawing out the spring through the reverse screw rod, thereby need less power to realize spring deformation, change the sensitivity of pipe displacement in-process, satisfy different operating modes and use.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the invention, the rotating turbine pushes air in the shell to be discharged through the exhaust pipe, and as the air pressure in the exhaust pipe is reduced, the air outside enters the shell through the air inlet, so that the air pressure balance between the air inlet and the air pressure in the exhaust pipe is maintained.

2. According to the invention, the spring is compressed by rotating the screw in the forward direction, so that the spring deformation is realized by needing larger force, the spring is elongated by rotating the screw in the reverse direction, so that the spring deformation is realized by needing smaller force, the sensitivity in the displacement process of the guide tube is changed, and different working conditions are met for use.

3. The air inlet cover is communicated with the outer side of the air inlet, the impeller is arranged in the air inlet cover, flowing air passes through the impeller to drive the impeller to rotate around the axis of the air inlet cover, meanwhile, an annular cavity is formed along the inner sides of the body, the pipe body and the convex ring, the outer blades are positioned in the annular cavity, a plurality of through holes penetrate through the pipe body, the annular cavity is communicated with the inner part of the pipe body through the through holes, and in the rotating process of the impeller, the outer blades push air in the annular cavity to penetrate through the through holes and enter the inner part of the shell, so that the air pressure at the air inlet end of the shell is increased, and the problem of surging is avoided.

4. The connecting port is communicated with the air outlet pipe through the pressure stabilizing mechanism, the connecting end of the pressure stabilizing mechanism is communicated with the inside of the annular cavity through the connecting port, the air pressure is reduced along with the air discharge in the annular cavity, the air pressure of the right cavity of the pressure stabilizing mechanism is reduced as shown in fig. 6, if the air pressure of the air inlet is smaller than the air pressure of the air outlet pipe, the pressure difference between the cavities at the left side and the right side of the pressure stabilizing mechanism is increased, the installed guide pipe is pushed to move to the right side, the communication between the cavities at the left side and the right side of the pressure stabilizing mechanism is realized, the air in the air outlet pipe enters the right cavity, the air pressure difference is effectively relieved, the guide pipe is directly reset along with the reduction of the air pressure difference, and the normal conveying of the air is ensured.

Drawings

FIG. 1 is a schematic structural diagram of the whole structure of the present invention;

FIG. 2 is a schematic view of the whole cross-sectional structure of the present invention;

FIG. 3 is a schematic view of the air intake shroud structure of the present invention;

FIG. 4 is a schematic view of an impeller according to the present invention;

FIG. 5 is a schematic view of a voltage stabilizing mechanism according to the present invention;

FIG. 6 is a schematic diagram of a cross-sectional structure of a voltage stabilizing mechanism according to the present invention;

FIG. 7 is a schematic view of the internal structure of the voltage stabilizing mechanism of the present invention;

fig. 8 is a schematic diagram of the overall transmission structure of the present invention.

In the figure: 1. a housing; 101. an exhaust pipe; 102. an air inlet; 103. sealing cover; 104. an air outlet pipe; 2. an air inlet cover; 201. a convex ring; 202. a connection port; 3. an impeller; 301. a tube body; 302. an outer blade; 303. a through hole; 304. a ring groove; 305. an inner blade; 4. an exhaust passage; 5. a voltage stabilizing mechanism; 501. a first connecting end; 502. a second connecting end; 503. an end cap; 6. a sleeve; 601. a chute; 602. a groove; 7. a conduit; 701. an annular groove; 702. a rib; 8. a turbine; 9. a rotating shaft; 10. a support; 11. a fixing member; 12. a screw; 13. a limit ring; 14. a spring; 15. a nut; 16. and a motor.

Detailed Description

The invention will be described in further detail with reference to the drawings and the detailed description. The embodiments of the invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.

Referring to fig. 1-8, the invention discloses an intake anti-surge tube of an MVR centrifugal vapor compressor, which comprises a shell 1, wherein a support 10 convenient to install is connected to the bottom of the shell 1, and the intake anti-surge tube further comprises an air suction component, an air intake component and a pressure stabilizing mechanism 5;

the air suction assembly comprises a shell 1, a turbine 8 and a rotating shaft 9, wherein the shell 1 is provided with an exhaust pipe 101 and an air inlet 102, the exhaust pipe 101 is communicated with the outside, the turbine 8 is arranged in the shell 1, the turbine 8 is fixedly installed on the end part of the rotating shaft 9 extending into the shell 1, the air suction assembly comprises an air suction cover 2 and an impeller 3, the impeller 3 is installed in the air suction cover 2 in a rotating mode, the air suction cover 2 is installed on the air inlet 102, the pressure stabilizing mechanism 5 comprises a cylinder body and a core body structure, the core body structure moving along the axis of the cylinder body is installed in the cylinder body, and the communication between the exhaust pipe 101 and the air inlet 102 is realized through the offset of the core body structure.

The inlet end of the inlet hood 2 is provided with a convex ring 201 expanding outwards, a connecting port 202 is formed in the outer side face of the convex ring 201, the connecting port 202 is communicated with the cylinder body through an exhaust channel 4, the impeller 3 is a pipe body 301, a ring groove 304 is formed in one side of the outer side face of the pipe body 301, a limiting ring is sleeved on the ring groove 304 and is matched with the limiting ring to be installed in the inlet hood 2, an edge body is arranged on the other side of the outer side face of the pipe body 301, annular cavities are formed along the inner side of the pipe body 301 and the convex ring 201, outer blades 302 are arranged on the outer side of the pipe body 301, the outer blades 302 are located in the annular cavities, a plurality of through holes 303 penetrate through the pipe body 301, and the annular cavities are communicated with the inside of the pipe body 301 through the through holes 303.

The outside of the tube 301 is provided with an outer blade 302, the outer blade 302 is located in the annular cavity, and the inside of the tube 301 is provided with an inner blade 305.

Round holes penetrate through the two opposite side surfaces of the shell 1, the round holes on one side surface are sealed through a sealing cover 103, and one end of the rotating shaft 9 penetrates through the sealing cover 103 and is fixedly connected with the turbine 8.

Both ends of the cylinder are provided with openings, the port of the cylinder is closed by an end cover 503, the side surface of the cylinder is provided with a first connecting end 501 and a second connecting end 502, the first connecting end 501 is communicated with the exhaust pipe 101 through the air outlet pipe 104, and the second connecting end 502 is communicated with the annular cavity through the exhaust channel 4 and the connecting port 202.

The core structure includes sleeve pipe 6 and pipe 7, and sleeve pipe 6 is fixed in the inboard middle part of barrel, and link one 501 and link two 502 that are equipped with simultaneously are located the both sides of sleeve pipe 6, and set up fluted 602 on the inner wall of sleeve pipe 6, set up annular groove 701 on the lateral surface of pipe 7, and sleeve pipe 6's length is the same with the length of pipe 7, and pipe 7 cooperates completely to install in sleeve pipe 6 and realizes sleeve pipe 6's closure, and sleeve pipe 6 is stretched out to the one end of pipe 7's cavity intercommunication that sleeve pipe 6 was realized to the both sides.

The connection port 202 is communicated with the air outlet pipe 104 through the pressure stabilizing mechanism 5, the second connection end 502 of the pressure stabilizing mechanism 5 is communicated with the inside of the annular cavity through the connection port 202, air pressure is reduced along with air discharge in the annular cavity, the air pressure of the right side cavity of the pressure stabilizing mechanism 5 is reduced as shown in fig. 6, if the air pressure of the air inlet 102 is smaller than that of the air outlet pipe 104, the pressure difference between the left side cavity and the right side cavity of the pressure stabilizing mechanism 5 is increased, the installed guide pipe 7 is pushed to move to the right side, the communication between the left side cavity and the right side cavity of the pressure stabilizing mechanism 5 is realized, air in the air outlet pipe 104 enters the right side cavity, the air pressure difference is effectively relieved, and the guide pipe 7 is directly reset along with the reduction of the air pressure difference, so that normal conveying of the air is ensured.

One end of the conduit 7 extends out of the sleeve 6 to realize cavity communication at two sides of the sleeve 6 and air flow to one side.

A plurality of sliding grooves 601 are formed in the inner wall of the sleeve 6, a plurality of convex edges 702 are arranged on the outer side face of the guide pipe 7, and the sliding grooves 601 correspond to the convex edges 702 one by one.

The prism holes are all offered at the both ends of pipe 7, the bottom surface in prism hole is equipped with the through-hole, install mounting 11 on the end cover 503, the prism that mounting 11 one side was equipped with stretches into in the prism hole, nut 15 has been placed to the bottom in prism hole, install spring 14 between nut 15 and the prism terminal surface, placed screw rod 12 in the through-hole, nut 15 cooperation is installed on screw rod 12, the screw thread of the nut 15 that is located different prism holes revolves to opposite, rotate screw rod 12 and realize that two nuts 15 are close to each other or keep away from each other, the end that screw rod 12 stretches out mounting 11 has cup jointed spacing collar 13.

The spring 14 is compressed by positively rotating the screw rod 12, so that the spring 14 is deformed by larger force, the spring 14 is stretched by reversely rotating the screw rod 12, the spring 14 is deformed by smaller force, the sensitivity of the catheter 7 in the displacement process is changed, and different working conditions are met.

The working principle is that in the working process, the rotating shaft 9 is in transmission connection with the motor 16 arranged on one side, so that the motor 16 drives the turbine 8 arranged in the shell 1 to rotate through the rotating shaft 9, the rotating turbine pushes air in the shell 1 to be discharged through the exhaust pipe 101, and along with the reduction of the air pressure in the exhaust pipe 101, the outside air enters the shell 1 through the air inlet 102, so that the air pressure balance between the air inlet 102 and the air pressure in the exhaust pipe 101 is maintained;

in the process of air intake and exhaust, when the inlet flow is smaller than the surge flow, the centrifugal compressor is in surge, the machine body can vibrate severely and drive the outlet pipeline and the factory building to vibrate, and if measures are not taken in time, the compressor is seriously damaged, for example, equipment and parts such as compressor parts, sealing rings, bearings, impellers, pipelines and the like are damaged;

the outside of the air inlet 102 is communicated with the air inlet cover 2, the impeller 3 is arranged in the air inlet cover 2, flowing air passes through the inner blades 305 of the impeller 3 to drive the impeller 3 to rotate around the axis of the air inlet cover 2, meanwhile, an annular cavity is formed along the inner sides of the body, the pipe body 301 and the convex ring 201, the outer blades 302 are positioned in the annular cavity, a plurality of through holes 303 penetrate through the pipe body 301, the annular cavity is communicated with the inside of the pipe body 301 through the through holes 303, and in the rotating process of the impeller 3, the outer blades 302 are realized to push the air in the annular cavity to pass through the through holes 303 and enter the inside of the shell 1, so that the air pressure at the air inlet 102 end of the shell 1 is increased, and the problem of surging is avoided;

in addition, the connection port 202 is communicated with the air outlet pipe 104 through the pressure stabilizing mechanism 5, the second connection end 502 of the pressure stabilizing mechanism 5 is communicated with the inside of the annular cavity through the connection port 202, air pressure is reduced along with air discharge in the annular cavity, the air pressure of the right side cavity of the pressure stabilizing mechanism 5 is reduced as shown in fig. 6, if the air pressure of the air inlet 102 is smaller than that of the air outlet pipe 104, the pressure difference between the left side cavity and the right side cavity of the pressure stabilizing mechanism 5 is increased, the installed guide pipe 7 is pushed to move to the right side along with the increase of the pressure difference between the left side cavity and the right side cavity of the pressure stabilizing mechanism 5, the air inside the air outlet pipe 104 is enabled to enter the right side cavity, the air pressure difference is effectively relieved, and the guide pipe 7 is directly reset along with the reduction of the air pressure difference, so that normal conveying of the air is ensured.

It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art and which are included in the embodiments of the present invention without the inventive step, are intended to be within the scope of the present invention. Structures, devices and methods of operation not specifically described and illustrated herein, unless otherwise indicated and limited, are implemented according to conventional means in the art.

Claims

1. The utility model provides a MVR centrifugal vapor compressor air intake anti-surge pipe, includes casing (1), the bottom of casing (1) is connected with support (10) of being convenient for install, its characterized in that still includes:

an air suction assembly comprising a housing (1), a turbine (8) and a rotating shaft (9), the housing (1) having an exhaust pipe (101) and an air inlet (102), the exhaust pipe (101) being in communication with the outside;

a turbine (8) is arranged in the shell (1), and the turbine (8) is fixedly arranged at the end part of the rotating shaft (9) extending into the shell (1);

the air inlet assembly comprises an air inlet cover (2) and an impeller (3), the impeller (3) is rotatably installed on the air inlet cover (2), and the air inlet cover (2) is installed on the air inlet (102);

the pressure stabilizing mechanism (5), the pressure stabilizing mechanism (5) comprises a cylinder body and a core body structure, the core body structure moving along the axis of the cylinder body is arranged in the cylinder body, and the exhaust pipe (101) and the air inlet (102) are communicated through the offset of the core body structure.

2. The MVR centrifugal vapor compressor intake anti-surge tube of claim 1, wherein: the air inlet end of the air inlet cover (2) is provided with a convex ring (201) expanding outwards, a connecting port (202) is formed in the outer side surface of the convex ring (201), and the connecting port (202) is communicated with the cylinder body through an exhaust channel (4);

the impeller (3) is characterized in that the impeller (3) body is a pipe body (301), an annular groove (304) is formed in one side of the outer side face of the pipe body (301), and a limiting ring is sleeved on the annular groove (304) and is matched and installed in the air inlet cover (2);

the utility model discloses a pipe body, including body (301), convex ring (201) and outer blade (302), the opposite side is equipped with along the body on the lateral surface of body (301), along the body, the inboard of body (301) and convex ring (201) forms annular cavity, the outside of body (301) is equipped with outer blade (302), outer blade (302) are located annular cavity, run through on body (301) have a plurality of through-hole (303), annular cavity passes through-hole (303) and the inside intercommunication of body (301).

3. The MVR centrifugal vapor compressor intake anti-surge tube of claim 2, wherein: the outer side of the pipe body (301) is provided with an outer blade (302), and the outer blade (302) is positioned in the annular cavity.

4. The MVR centrifugal vapor compressor intake anti-surge tube of claim 1, wherein: round holes penetrate through two opposite side surfaces of the shell (1), the round holes on one side surface are sealed through a sealing cover (103), and one end of the rotating shaft (9) penetrates through the sealing cover (103) to be fixedly connected with the turbine (8).

5. The MVR centrifugal vapor compressor intake anti-surge tube of claim 2, wherein: openings are formed in two ends of the cylinder, and the ports of the cylinder are closed through end covers (503);

the side of the cylinder is provided with a first connecting end (501) and a second connecting end (502), the first connecting end (501) is communicated with the exhaust pipe (101) through the air outlet pipe (104), and the second connecting end (502) is communicated with the annular cavity through the exhaust channel (4) and the connecting port (202).

6. The MVR centrifugal vapor compressor intake anti-surge tube of claim 5, wherein: the core structure comprises a sleeve (6) and a guide pipe (7), wherein the sleeve (6) is fixed in the middle of the inner side of the cylinder, and a first connecting end (501) and a second connecting end (502) are arranged at the same time and are positioned at two sides of the sleeve (6);

the inner wall of the sleeve (6) is provided with a groove (602), the outer side face of the guide pipe (7) is provided with an annular groove (701), the length of the sleeve (6) is the same as that of the guide pipe (7), the guide pipe (7) is completely matched and installed in the sleeve (6) to realize the sealing of the sleeve (6), and one end of the guide pipe (7) extends out of the sleeve (6) to realize the cavity communication of the two sides of the sleeve (6).

7. The MVR centrifugal vapor compressor intake anti-surge tube of claim 6, wherein: a plurality of sliding grooves (601) are formed in the inner wall of the sleeve (6), and a plurality of ribs (702) are formed in the outer side face of the guide pipe (7);

the sliding grooves (601) are in one-to-one correspondence with the convex edges (702).

8. The MVR centrifugal vapor compressor intake anti-surge tube of claim 6, wherein: prismatic holes are formed in two ends of the guide pipe (7), and through holes are formed in the bottom surfaces of the prismatic holes;

a fixing piece (11) is arranged on the end cover (503), a prism arranged on one side of the fixing piece (11) extends into the prism hole, a nut (15) is arranged at the bottom end of the prism hole, and a spring (14) is arranged between the nut (15) and the prism end face;

screw rods (12) are placed in the through holes, the nuts (15) are installed on the screw rods (12) in a matched mode, the screw threads of the nuts (15) located in different prism holes are opposite in rotation direction, and the screw rods (12) are rotated to enable the two nuts (15) to be close to or far away from each other.