Built-in guide vane adjusting device of compressor

Abstract

A built-in guide vane adjusting device of a compressor comprises a shell connected with an air inlet of the compressor in a sealed mode, the shell and the compressor form a compressor air inflow adjusting cavity, and the flow of an air outlet channel of the compressor air inflow adjusting cavity is controlled through a guide vane device in the compressor air inflow adjusting cavity. The guide vane device at least comprises five or more than five guide vanes which are matched with one another to form a circle, the opening degree of a gap between the adjacent guide vanes is controlled by driving and rotating of the deflector rod device connected with each guide vane, each deflector rod device is driven by the same driving disc, and the driving disc is driven by a motor. According to the built-in guide vane adjusting device of the compressor, the flow of the air outlet passage is controlled through the guide vane device in the air inflow adjusting cavity of the compressor, so that the overall performance of the compressor is controlled, and meanwhile, gas leakage is avoided.

Description

Technical Field

[0001] The utility model relates to the field of centrifugal compressor equipment, in particular to a centrifugal compressor guide vane regulating mechanism and a driving principle applied to the fields of refrigeration and chemical industry. Background Art

[0002] In the process of refrigeration and chemical industry, centrifugal compressor is an indispensable core equipment. Since compressed gas usually exhibits high pressure, high temperature, flammable and explosive characteristics, and some gases are highly toxic, once the gas leaks, the performance of the entire compressor and its process will be affected. More importantly, the gas leaks into the environment and pollutes the environment. If it is flammable, explosive or toxic gas, human life will be threatened. Therefore, zero gas leakage is required during the operation of the compressor, and the guide vane adjustment device, as an important part of the compressor, has the main function of controlling the suction volume of the compressor, so as to control the overall performance of the compressor and make the performance parameters of the compressor meet the requirements of the process.

[0003] According to the contents disclosed in patent CN103016384B, the guide vane actuator is installed outside the housing, is coaxially connected to an active guide vane through a drive shaft, and rotates with the drive shaft, and then drives other guide vanes to rotate together through the connecting rod, spherical coupling and drive ring.

[0004] According to the disclosure of patent CN 105020162 A, the guide vane is connected to the fork, one end of the fork is a U-shaped structural groove, a ball head rolling body is installed on the drive ring, the drive ring drives the ball head rolling body to move, and the ball head rolling body pushes the fork to drive the guide vane to rotate together.

[0005] According to the characteristics of the guide vane mechanism and the structural features of the related actuators described in the above two patents, there are the following common problems:

[0006] Question 1: The electric actuator is installed outside the housing, and the guide vane mechanism is driven to rotate by the drive shaft extending out of the housing. The drive shaft and the housing are sealed by multiple O-rings to ensure that the pressure in the housing does not leak. The problem caused by this is that long-term operation will cause the O-ring to age and fail, and the risk of gas leakage is very high. In addition, there is a large friction between the O-ring and the rotating main shaft, which causes the friction torque of the main shaft to increase. A larger electric actuator must be used to ensure the normal operation of the adjustment mechanism. The selection of a larger actuator will increase the procurement cost. In addition, the actuator is installed outside the housing, which makes the entire adjustment device larger and occupies more space. At the same time, the electric actuator is prone to bumping during transportation and assembly.

[0007] Question 2: The guide vane connection usually adopts shift blocks, shift forks and hinges. The guide vane and the casing are equipped with a shaft sleeve, which is generally made of carbon steel, copper, aluminum alloy and other materials. The friction coefficient between the components is large. If it does not work for a long time, the contact surface of the connecting parts will be affected by oxidation corrosion, making the entire adjustment device inflexible and even stuck in severe cases.

[0008] Question three, the guide vane is generally an active rotating guide vane, which is directly driven by an electric actuator through a drive shaft, and then drives the drive ring to rotate through the connecting parts installed on the active guide vane. The connecting parts connected to the drive ring are connected to other guide vanes and drive them to rotate, which will cause the drive ring to rotate eccentrically. The active guide vanes and driven guide vanes are subjected to uneven force during rotation, increasing the failure risk of the active guide vanes and their related connecting parts.

[0009] The above-mentioned prior art problems are urgently needed to be solved by those skilled in the art. Utility Model Content

[0010] The utility model aims to provide a built-in guide vane regulating device for a compressor with zero gas leakage, small guide vane driving resistance and few mechanical failures in view of the defects and shortcomings of the prior art.

[0011] In order to achieve the above-mentioned purpose, the utility model provides a built-in guide vane adjustment device for a compressor, including a shell body which is tightly connected to the air inlet of the compressor, a guide vane device is arranged in the shell body, the shell body and the compressor form an air intake volume adjustment chamber of the compressor, the flow rate of the air outlet duct of the air intake volume adjustment chamber of the compressor is controlled by the guide vane device inside the air intake volume adjustment chamber of the compressor, the guide vane device includes at least five or more guide vanes which cooperate with each other to form a circle, the gap opening between adjacent guide vanes is driven and rotated by lever devices connected to each guide vane, each lever device is driven by the same drive disk, and the drive disk is driven by a motor, the motor, drive disk, lever device and guide vane device are all located inside the air intake volume adjustment chamber of the compressor, and are tightly closed in the shell body, which completely solves the problem of gas leakage, can achieve zero leakage, and greatly improves the safety performance of the equipment.

[0012] The outlet air duct is coaxially arranged with the inlet air duct of the shell, a guide vane device is arranged between the outlet air duct and the inlet air duct, a motor seat hole perpendicular to the inlet air duct is arranged on the side wall of the shell, the motor seat hole is provided with a coaxial motor wiring hole, the wires in the motor wiring hole are connected to the wiring board, and the wiring board is sealed and connected to the shell through a sealing ring to achieve a sealing function. A temperature and pressure sensor is arranged on the upper side of the inlet air duct, and the temperature and pressure sensor cooperates with the third sealing ring to be sealed and connected to the temperature and pressure installation hole of the connection seat located on the side of the shell, and the temperature and pressure sensor senses the temperature and pressure of the inhaled air.

[0013] The side of the motor seat hole is provided with a first mounting groove and a second mounting groove which are perpendicular to each other, and the first mounting groove and the second mounting groove are fixedly connected to the motor by screws.

[0014] The guide vane device includes a guide vane, one end of which is provided with a fan-shaped blade, and the other end of the guide vane is provided with a first groove and a first protrusion, the first groove is engaged with the second protrusion of the lever, and the first protrusion is engaged with the second groove of the lever, and the integrated assembly performance of the guide vane and the lever is achieved through the mutually matching groove and protrusion structure.

[0015] The lever device includes a lever provided with a countersunk hole coaxial with the guide vane, a screw sleeved with a spring gasket is provided in the countersunk hole, the screw is threadedly connected to a screw sleeve in the guide vane shaft hole, a parallel first screw hole is provided on the side of the countersunk hole, the first screw hole is matched to connect one end of the first screw, the other end of the first screw is a cylinder, a coaxial second screw hole is provided inside the cylinder, a rotatable ball head is sleeved on the outer circumference of the cylinder, a limit screw is provided at one end of the ball head, and the limit screw is threadedly connected to the second screw hole. The lever is connected to the fairing shell through the lever hole, and the fairing shell forms a linked whole with each lever device through five or more lever holes corresponding to the levers, and the ball head on each lever device corresponds to a shifting groove located on the inner side of the drive disk. This lever device cooperates with the fairing shell so that multiple lever devices form a linkage device, thereby improving the reliability of equipment operation.

[0016] The driving disk is provided with a connecting groove on the outside, and one end of the pull plate is embedded in the connecting groove. The other end of the pull plate is connected to one end of the pull rod through a joint. The other end of the pull rod is connected to the motor and forms a whole with the motor. The joint includes a first connecting groove of a U-shaped structure, a third screw hole is provided on the side of the first connecting groove, and the third screw hole is connected to the second connecting hole of the pull plate through a second screw. A fourth screw is provided on one side of the first connecting groove, and the fourth screw is threadedly connected to the axial hole of the pull rod and locked by a first nut. The pull rod is located in the circumferential tangent direction of the driving disk, and a fourth screw hole is provided on the side of the connecting groove. The fourth screw hole is connected to the first connecting hole at one end of the pull plate through a fifth screw. A round hole is provided on the other side of the connecting groove, and a first magnet is arranged in the round hole. The first magnet controls the guide vane opening display device. The pull rod pushes and pulls the driving disk through linear motion to achieve rotational motion. The ball head corresponds to the toggle groove on the inner side of the driving disk so that the rolling force direction of the ball head is the same as the rotation direction of the driving disk and the guide vane, which greatly improves the stability of control.

[0017] The guide vane opening display device includes a display slot located in the shell, a spherical second magnet is built in the display slot, the second magnet attracts the first magnet across the bottom of the display slot, a scale display board is provided on the outside corresponding to the position of the second magnet, the guide vane opening is controlled by rotating the driving disk by a certain angle, the first magnet on the driving disk drives the second magnet to rotate synchronously at the same time, and the rotation angle of the second magnet is used to judge the guide vane opening through the reading of the scale display board.

[0018] A bearing device is provided between the driving disk and the fairing shell, and the bearing device includes a bearing, the inner side of the bearing is connected to the fairing shell through a first retaining ring, and the outer side of the bearing is connected to the driving disk through a second retaining ring, thereby reducing the rotation resistance of the driving disk around the fairing shell.

[0019] By adopting the above technical solution, the utility model provides a built-in guide vane adjustment device for a compressor, which controls the gas flow in the airway through the compressor guide vane device, thereby achieving control over the overall performance of the compressor and avoiding the risk of gas leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] FIG1 is a schematic diagram of the internal structure of a built-in guide vane adjustment device for a compressor according to the utility model;

[0022] FIG2 is a schematic diagram of the exploded installation structure of a built-in guide vane adjustment device for a compressor according to the utility model;

[0023] FIG3 is a schematic diagram of the three-dimensional structure of the housing in the present invention;

[0024] Figure 4 is a schematic cross-sectional view of the internal installation structure of the housing of the utility model;

[0025] Figure 5 shows Figure 4 Schematic diagram of the cross-sectional structure in the middle AA direction;

[0026] Figure 6 shows Figure 5 BB-direction cross-sectional structural diagram;

[0027] Figure 7 is a schematic diagram of the motor installation structure in the utility model;

[0028] FIG8 is a schematic diagram of the installation structure of the lever device and the guide vane device in the utility model. DETAILED DESCRIPTION

[0029] The following is a clear and complete description of the technical solutions in the embodiments of the utility model in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the utility model.

[0030] like Figure 1-8 As shown, a built-in guide vane adjustment device for a compressor comprises a shell 1 which is sealedly connected to an air inlet of the compressor, a guide vane device is arranged in the shell 1, the shell 1 and the compressor form an air intake regulating chamber for the compressor, the flow rate of an air outlet duct 31 of the air intake regulating chamber for the compressor is controlled by the guide vane device inside the air intake regulating chamber for the compressor, the guide vane device comprises at least five or more guide vanes 13 which cooperate with each other to form a circle, the gap opening between adjacent guide vanes 13 is driven to rotate and controlled by lever devices connected to each guide vane, each lever device is driven by the same drive disk 6, the drive disk 6 is driven by a motor 19, the motor 19, the drive disk 6, the lever device and the guide vane device are all located inside the air intake regulating chamber for the compressor.

[0031] As a preferred structure, the outlet air duct 31 is coaxially arranged with the inlet air duct 32 of the shell 1, and a guide vane device is arranged between the outlet air duct 31 and the inlet air duct 32. The side wall of the shell 1 is provided with a motor seat hole 182 perpendicular to the inlet air duct 32, and the motor seat hole 182 is provided with a coaxial motor wiring hole 111. The wires in the motor wiring hole 111 are connected to the wiring board 17, and the wiring board 17 is tightly connected to the shell 1 through the sealing ring 18, forming an excellent sealing performance, which can achieve zero gas leakage. A temperature and pressure sensor 9 is arranged on the side of the inlet air duct 32. The temperature and pressure sensor 9 cooperates with the third sealing ring 10 to be tightly connected to the temperature and pressure installation hole 82 located in the connecting seat 71 on the side of the shell 1, and the temperature and pressure sensor 9 senses the intake pressure and temperature.

[0032] In order to achieve linear drive performance, the side of the motor seat hole 182 is provided with a first mounting groove 181 and a second mounting groove 183 which are perpendicular to each other, and the first mounting groove 181 and the second mounting groove 183 are fixedly connected to the motor 19 by screws. The guide vane device includes a guide vane 13, one end of which is provided with a fan-shaped blade, and the guide vane 13 is connected to the lever 5 as a whole through a mortise and tenon structure, and the other end of the guide vane 13 is provided with a first groove 132 and a first protrusion 131, the first groove 132 is engaged with the second protrusion 54 of the lever 5, and the first protrusion 131 is engaged with the second groove 53 of the lever 5. The lever device includes a lever 5 provided with a countersunk hole 52 coaxial with the guide vane 13, a screw 7 sleeved with a spring gasket 8 is provided in the countersunk hole 52, the screw 7 is threadedly connected to the screw sleeve 11 in the axial hole of the guide vane 13, a parallel first screw hole 51 is provided on the side of the countersunk hole 52, the first screw hole 51 is matched to connect one end of the first screw 42, the other end of the first screw 42 is a cylinder 4, a coaxial second screw hole 41 is provided inside the cylinder 4, a rotatable ball head 3 is sleeved on the outer periphery of the cylinder 4, a limit screw 2 is provided at one end of the ball head 3, and the limit screw 2 is threadedly connected to the second screw hole 41. The lever 5 is connected to the fairing shell 12 through the lever hole 123, and the fairing shell 12 forms a linked whole with each lever device through five or more lever holes 123 corresponding to the lever 5, and the ball head 3 on each lever device corresponds to a toggle groove 62 located on the inner side of the drive disk 6. A connecting groove 64 is provided on the outside of the driving disk 6, and one end of the connecting plate 22 is embedded in the connecting groove 64. The other end of the pulling plate 22 is connected to one end of the pulling rod 191 through the joint 21. The other end of the pulling rod 191 is connected to the motor 19 and forms a whole with the motor. The pulling rod 191 is located in the tangential direction of the circumference of the driving disk 6. The pulling rod 191 generates vertical upward and downward push and pull forces under the drive of the motor. This driving force is applied to the outer circumference of the driving disk 6 tangentially, so that the driving disk 6 can rotate within a certain angle range. The rotation driving force of the driving disk 6 is the same as the rotation angle and direction of the ball head 3 and the guide vane 13, so as to achieve the stability and accuracy of the gap opening between adjacent guide vanes 13. The ball head 3 drives the driving disk 6 to rotate synchronously through the rotational motion, which is conducive to reducing the mutual wear between the two and greatly prolonging the service life.

[0033] In order to further improve the convenience of connection, the joint 21 includes a first connecting groove 213 of a U-shaped structure, and a third screw hole 212 is provided on the side of the first connecting groove 213. The third screw hole 212 is connected to the second connecting hole 221 of the pull plate 22 through the second screw 23. A fourth screw 211 is provided on one side of the first connecting groove 213. The fourth screw 211 is threadedly connected to the axial hole of the pull rod 191 and is locked by the first nut 20.

[0034] As a built-in adjustment device, a fourth screw hole 63 is provided on the side of the connection slot 64, and the fourth screw hole 63 is connected to the first connection hole 222 at one end of the pull plate 22 through the fifth screw 26. A round hole 61 is provided on the other side of the connection slot 64, and a first magnet 27 is arranged in the round hole 61. The first magnet 27 controls the guide vane opening display device. The guide vane opening display device includes a display slot 81 located in the housing 1, and a spherical second magnet 28 is built in the display slot 81. The second magnet 28 attracts the first magnet 27 across the bottom of the display slot 81. A scale display board 29 is provided on the outside corresponding to the position of the second magnet 28. The rotation of the first magnet 27 synchronously drives the second magnet 28 to make corresponding movements, thereby realizing the technical function of displaying the gap opening between adjacent guide vanes 13 on the scale display board 29.

[0035] As a preferred structure, the first magnet 27 is cylindrical in shape so as to be embedded in the circular hole 61 , and the two are bonded and fixed by glue. The second magnet 28 is spherical in shape so as to be rolled smoothly in the display slot 81 .

[0036] As a preferred structure, a bearing device is provided between the drive disk 6 and the fairing shell 12, and the bearing device includes a bearing 15. The inner side of the bearing 15 is connected to the fairing shell 12 through a first retaining ring 14, and the outer side of the bearing 15 is connected to the drive disk 6 through a second retaining ring 16. The bearing device realizes the smooth rotation function of the drive disk 6 around the fairing shell 12.

[0037] Although the embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and cannot be understood as limiting the present invention. Those skilled in the art can change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A built-in guide vane adjustment device for a compressor, characterized in that: The invention comprises a housing (1) which is hermetically connected to an air inlet of a compressor, a guide vane device being arranged in the housing (1), the housing (1) and the compressor forming a compressor air inlet volume regulating chamber, the flow rate of an air outlet passage (31) of the compressor air inlet volume regulating chamber being controlled by the guide vane device in the compressor air inlet volume regulating chamber, the guide vane device comprising at least five guide vanes (13) which cooperate with each other to form a circle, the gap opening between adjacent guide vanes (13) being driven and rotated by lever devices connected to the respective guide vanes, the lever devices being driven by the same drive disk (6), and the drive disk (6) being driven by a motor (19); The air outlet duct (31) is coaxially arranged with the air inlet duct (32) of the shell (1), a guide vane device is arranged between the air outlet duct (31) and the air inlet duct (32), the side wall of the shell (1) is provided with a motor seat hole (182) perpendicular to the air inlet duct (32), the motor seat hole (182) is provided with a coaxial motor wiring hole (111), the wires in the motor wiring hole (111) are connected to the wiring board (17), and the wiring board (17) is sealed and connected to the shell (1) through a sealing ring (18); a temperature and pressure sensor (9) is arranged on the upper side of the air inlet duct (32), and the temperature and pressure sensor (9) cooperates with the third sealing ring (10) to be sealed and connected to the temperature and pressure installation hole (82) of the connecting seat (71) on the side of the shell (1).

2. A compressor built-in guide vane adjustment device according to claim 1, characterized in that: A first mounting groove (181) and a second mounting groove (183) which are perpendicular to each other are provided on the side of the motor seat hole (182); the first mounting groove (181) and the second mounting groove (183) are fixedly connected to the motor (19) by means of screws; the first mounting groove (181), the second mounting groove (183) and the motor seat hole (182) are all U-shaped structures.

3. A compressor built-in guide vane adjustment device according to claim 1, characterized in that: The guide vane device comprises a guide vane (13), one end of the guide vane (13) being provided with a fan-shaped blade, the other end of the guide vane (13) being provided with a first groove (132) and a first protrusion (131), the first groove (132) being engaged with the second protrusion (54) of the shifting rod (5), and the first protrusion (131) being engaged with the second groove (53) of the shifting rod (5).

4. A compressor built-in guide vane adjustment device according to claim 1, characterized in that: The lever device comprises a lever (5) provided with a countersunk hole (52) coaxial with the guide vane (13), a screw (7) sleeved with a spring gasket (8) provided in the countersunk hole (52), the screw (7) being threadedly connected to a threaded sleeve (11) in the axial hole of the guide vane (13), a first parallel screw hole (51) provided on the side of the countersunk hole (52), the first screw hole (51) being cooperatively connected to one end of a first screw (42), the other end of the first screw (42) being a cylinder (4), a coaxial second screw hole (41) being provided inside the cylinder (4), a rotatable ball head (3) being sleeved on the outer circumference of the cylinder (4), a limit screw (2) being provided at one end of the ball head (3), the limit screw (2) being threadedly connected to the second screw hole (41).

5. A compressor built-in guide vane adjustment device according to claim 4, characterized in that: The lever (5) is connected to the fairing shell (12) via a lever hole (123); the fairing shell (12) has five or more lever holes (123) that correspond one to one with the levers (5), so that each lever device forms a linked whole; the ball head (3) on each lever device corresponds to a shifting groove (62) located on the inner side of the driving disk (6).

6. The compressor built-in guide vane adjustment device according to claim 1, characterized in that: The driving disk (6) is provided with a connecting groove (64) on the outside, and the connecting groove (64) is embedded with one end of the connecting plate (22). The other end of the pulling plate (22) is connected to one end of the pulling rod (191) through a joint (21). The other end of the pulling rod (191) is connected to the motor (19) and forms a whole with the motor. The joint (21) includes a first connecting groove (213) of a U-shaped structure. A third screw hole (212) is provided on the side of the first connecting groove (213). The third screw hole (212) is connected to the second connecting hole (221) of the pulling plate (22) through a second screw (23). A fourth screw (211) is provided on one side of the first connecting groove (213). The fourth screw (211) is threadedly connected to the shaft hole of the pulling rod (191) and is locked by a first nut (20).

7. A compressor built-in guide vane adjustment device according to claim 6, characterized in that: The pull rod (191) is located in the circumferential tangent direction of the driving disk (6), and a fourth screw hole (63) is provided on the side of the connecting groove (64). The fourth screw hole (63) is connected to the first connecting hole (222) at one end of the pull plate (22) through a fifth screw (26). A circular hole (61) is provided on the other side of the connecting groove (64), and a first magnet (27) is installed in the circular hole (61). The first magnet (27) controls the guide vane opening display device.

8. A compressor built-in guide vane adjustment device according to claim 7, characterized in that: The guide vane opening display device comprises a display slot (81) located in a housing (1), the display slot (81) having a built-in spherical second magnet (28), the second magnet (28) attracting the first magnet (27) across the bottom of the display slot (81), and a scale display plate (29) being provided at a position corresponding to the second magnet (28).

9. The compressor built-in guide vane adjustment device according to claim 5, characterized in that: A bearing device is provided between the driving disk (6) and the fairing shell (12), the bearing device comprising a bearing (15), the inner side of the bearing (15) being connected to the fairing shell (12) via a first retaining ring (14), and the outer side of the bearing (15) being connected to the driving disk (6) via a second retaining ring (16).

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