High-power high-speed double-screw vacuum pump based on water-cooling double motors

Abstract

The utility model discloses a high-power high-speed twin-screw vacuum pump based on water-cooled double motors, which relates to the technical field of vacuum pumps and comprises a pump component and a motor component, the pump component comprises two screws, the motor component comprises a casing, two mounting holes are fixedly arranged in the casing, and the two mounting holes are communicated with the pump component. Two mounting holes are formed in the casing, driving mechanisms are fixedly arranged in the two mounting holes, each driving mechanism comprises a winding stator and a rotor shaft, the winding stators are annular and are fixedly arranged in the mounting holes, the rotor shafts are coaxially arranged in the winding stators, and the rotor shafts are rotatably connected with the casing. The winding stators can drive the rotor shafts to rotate when being electrified, and one ends of the two rotor shafts are fixedly connected with one ends of the two screw rods respectively; the service life of the vacuum pump can be greatly prolonged, meanwhile, the vacuum pump has the high-speed and high-power operation capacity, and the pumping speed capacity of the vacuum pump is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to vacuum pump technical field, concretely for high -power high -speed double screw vacuum pump based on water -cooled double motor. BACKGROUND

[0002] Double screw vacuum pump is the suction equipment of the suction and exhaust action produced by a pair of screw in the pump shell synchronous high -speed reverse rotation. The existing double screw vacuum pump is driven by a motor, and the driving part includes a driving shaft and a synchronous gear. When the motor rotates, the driving shaft can be driven to rotate, which directly drives the driving screw to rotate on one hand, and drives the driven screw to rotate through the synchronous gear on the other hand. The existing double screw vacuum pump is meshed and driven between the synchronous gears during work, which has wear after long time operation, and the rated life is low. At the same time, the mechanical properties and heat dissipation properties of the vacuum pump are restricted by the structure, it is difficult to realize high power and high speed operation, the frequency reduction speed of the vacuum pump is large when breaking the gas, and the pumping speed of the vacuum pump is also restricted. SUMMARY

[0003] The utility model discloses a high -power high -speed double screw vacuum pump based on water -cooled double motor, which drives two screws to rotate through two servo motors, greatly improves the service life, has the ability of high speed and high power operation, and effectively improves the pumping speed of the vacuum pump.

[0004] The utility model discloses a high -power high -speed double screw vacuum pump based on water -cooled double motor, which drives two screws to rotate through two servo motors, greatly improves the service life, has the ability of high speed and high power operation, and effectively improves the pumping speed of the vacuum pump.

[0005] A high -power high -speed double screw vacuum pump based on water -cooled double motor, including pump assembly, the pump assembly includes pump shell, the pump shell is rotatably arranged with two screws of opposite rotation direction and mutual adaptation,

[0006] Still include motor assembly, the motor assembly includes the casing, be fixed with two mounting holes in the casing, two The drive mechanism is fixedly arranged in two mounting holes;

[0007] The drive mechanism includes winding stator and rotor shaft, the winding stator is annular and fixedly arranged in the mounting hole, the rotor shaft is coaxially arranged in the winding stator, the rotor shaft is rotatably connected with the casing, the winding stator can drive the rotor shaft to rotate when electrified;

[0008] The end of two rotor shafts is fixedly connected with the end of two screws respectively.

[0009] Further, the drive mechanism further includes an encoder, and the encoder is used for detecting the phase position of the rotor shaft in the drive mechanism.

[0010] Further, a controller is further included, which is electrically connected with the encoder and the winding stator.

[0011] Further, a cooling ring cavity is processed in the casing, an installation table is formed inside the cooling ring cavity, and the two installation holes are both arranged on the installation table.

[0012] Further, a first liquid port, a second liquid port and a flow channel hole are processed on the casing, opposite sides of the cooling ring cavity are communicated with one end of the first liquid port and the flow channel hole respectively, and the other end of the flow channel hole is communicated with the second liquid port.

[0013] Further, the casing is made of a material with good heat conductivity.

[0014] The utility model discloses a beneficial effect is:

[0015] The high -power high -speed double screw vacuum pump based on water -cooled double motor, including pump assembly and motor assembly, this pump assembly with the screw end structure of existing double screw pump is identical, it includes two screws, the motor assembly includes the casing, and two drive mechanisms are fixedly arranged in the casing, the drive mechanism includes winding stator and rotor shaft, and it is identical with motor principle, when winding stator energization can drive rotor shaft rotation, and the above-mentioned two screws are fixedly connected with two rotor shafts respectively. The high -power high -speed double screw vacuum pump based on water -cooled double motor is similar to the form that two screws are rotated respectively by double motor, and no transmission stress between two screws, can greatly improve the service life, also can realize greater power, higher speed operation, reduce the frequency reduction speed of vacuum pump break gas technology, and further greatly improve the pumping speed of vacuum pump.

[0016] Setting up the encoder and the controller, can carry out closed loop automatic control to the rotating speed of two screws when running, provide support for the stable high -speed operation of vacuum pump, to ensure that reach the ability of improving pump pumping speed, setting up the cooling ring cavity, can guarantee the cooling effect to winding stator when running, further avoid the restriction to high -speed operation due to the reason of heat dissipation. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 It is split structure schematic diagram for the high -power high -speed double screw vacuum pump based on water -cooled double motor of the utility model;

[0018] Fig. 2 It is the installation structure schematic diagram of winding stator and screw in casing for the high -power high -speed double screw vacuum pump based on water -cooled double motor of the utility model;

[0019] Fig. 3 It is casing cross section structure schematic diagram for the high -power high -speed double screw vacuum pump based on water -cooled double motor of the utility model;

[0020] Fig. 4The utility model discloses a high -power high -speed double screw vacuum pump of water -cooled double motor based on internal structure schematic drawing of the far away screw one end of the machine shell in the utility model discloses a high -power high -speed double screw vacuum pump of water -cooled double motor based on.

[0021] In the figure, 1 - screw, 2 - machine shell, 3 - winding stator, 4 - rotor shaft, 5 - encoder, 6 - cooling ring cavity, 7 - mounting table, 8 - first liquid port, 9 - second liquid port, 10 - flow channel hole. DETAILED DESCRIPTION

[0022] The technical scheme of the utility model will be described in further detail below in conjunction with the drawings, but the protection scope of the utility model is not limited to the following.

[0023] As Figs. 1 to 4 The utility model discloses a high -power high -speed double screw vacuum pump of water -cooled double motor based on, including pump assembly, and the pump assembly with the screw end structure of existing double screw pump is identical, and it includes pump shell (not shown in drawing), and two screws 1 are rotatablely arranged in the pump shell, and two screws 1 are mutually engaged and are matched, and the air suction, exhaust effect of two screws 1 when rotating in the opposite direction can realize vacuum pumping.

[0024] On this basis, the driving end is improved, and a motor assembly is arranged, the motor assembly includes a machine shell 2, two mounting holes are fixedly arranged in the machine shell 2, and a driving mechanism is fixedly arranged in the two mounting holes. The driving mechanism includes a winding stator 3 and a rotor shaft 4, the winding stator 3 is annular and is fixedly arranged in the mounting hole, the rotor shaft 4 is coaxially arranged in the winding stator 3, and the rotor shaft 4 is rotatably connected with the machine shell 2. The driving mechanism is consistent with the principle of the motor, and the winding coil is arrayed on the winding stator 3, and the permanent magnet is arrayed on the rotor shaft 4, and the rotor shaft 4 can be directly driven to rotate when the winding stator 3 is powered.

[0025] One end of the two rotor shafts 4 is fixedly connected with one end of the two screws 1, that is, the two winding stators 3 are powered to drive the two screws 1 to rotate respectively, which is similar to the form of double motors driving respectively, and in working, the synchronous reverse rotation of the two screws 1 can be realized by matching the rotating speeds of the two motors, so that the two screws 1 are not subjected to transmission stress, the influence of gear wear on service life is avoided, and the service life can be greatly improved. At the same time, it is no longer restricted by the original transmission structure, and can realize larger power and higher speed operation, reduce the frequency reduction speed during the gas breaking process of the vacuum pump, and further greatly improve the pumping capacity of the vacuum pump.

[0026] In specific implementation, each driving mechanism is further integrally provided with an encoder 5, which is used to detect the phase position of the rotor shaft 4 in the corresponding driving mechanism in real time, so as to control the synchronous rotation of the two rotor shafts 4. In specific implementation, the vacuum pump further comprises a controller, which is electrically connected with the encoders 5 and the winding stator 3 of the two driving mechanisms, and is used to receive the data detected by the two encoders 5 in real time and automatically control the current of the winding stator 3 according to the data, so as to ensure the synchronous rotation of the two screw rods 1 in opposite directions. Thus, closed-loop control is realized, which provides support for the stable high-speed operation of the vacuum pump and ensures the ability to improve the pumping speed.

[0027] Further, the casing 2 is internally machined with a cooling ring cavity 6 during machining, and an installation table 7 is formed inside the cooling ring cavity 6 after machining, and the two mounting holes are arranged on the installation table 7. The machining of the casing 2 is convenient, and the structure is compact after assembly. In specific implementation, the casing 2 is made of a material with good heat conductivity, and cooling liquid is injected into the cooling ring cavity 6 during use, which has a good cooling effect on the winding stator 3 and avoids the restriction on high-speed operation due to heat dissipation. Further, the casing 2 is further machined with a first liquid port 8, a second liquid port 9 and a flow channel hole 10. The opposite sides of the cooling ring cavity 6 are respectively communicated with one end of the first liquid port 8 and the flow channel hole 10, and the other end of the flow channel hole 10 is communicated with the second liquid port 9. Connecting the first liquid port 8 and the second liquid port 9 to the external circulation system can realize the circulating pumping of the cooling ring cavity 6, and further improve the cooling effect.

[0028] The above only describes preferred embodiments of the present application, and it should be understood that the present application is not limited to the forms disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concepts described herein by using the above teachings or related technologies or knowledge. Any modification and change made by those skilled in the art without departing from the spirit and scope of the present application shall be within the protection scope of the claims of the present application.

Claims

1. A high-power high-speed twin-screw vacuum pump based on water-cooled double motors, comprising a pump assembly, the pump assembly comprising a pump casing, two screws with opposite rotation directions and mutual adaptation are arranged rotatably in the pump casing, characterized in that, It also includes a motor assembly, the motor assembly includes a casing, the casing is fixed with two mounting holes, two mounting holes are fixedly provided with a drive mechanism; The drive mechanism includes a winding stator and a rotor shaft, the winding stator is annular and fixedly arranged in the mounting hole, the rotor shaft is coaxially arranged in the winding stator, the rotor shaft is rotatably connected with the casing, the winding stator can drive the rotor shaft to rotate when energized; Two rotor shafts are fixedly connected with one end of two screw rods respectively.

2. The high-power high-speed twin-screw vacuum pump based on water-cooled double motors according to claim 1, characterized in that, The drive mechanism further includes an encoder for detecting the phase position of the rotor shaft in the drive mechanism.

3. The high-power high-speed twin-screw vacuum pump based on water-cooled double motors according to claim 2, characterized in that, It also includes a controller, the controller is electrically connected with the encoder and winding stator.

4. The high-power high-speed twin-screw vacuum pump based on water-cooled double motors according to claim 1, characterized in that, The casing is processed with a cooling ring cavity, the cooling ring cavity is formed with a mounting table inside, and two mounting holes are arranged on the mounting table.

5. The high-power high-speed twin-screw vacuum pump based on water-cooled double motors according to claim 4, characterized in that, The casing is processed with a first liquid port, a second liquid port and a flow channel hole, the opposite sides of the cooling ring cavity are respectively communicated with one end of the first liquid port and the flow channel hole, and the other end of the flow channel hole is communicated with the second liquid port.

6. The high-power high-speed twin-screw vacuum pump based on water-cooled double motors according to claim 4, characterized in that, The casing is made of a material with good thermal conductivity.

Images