Positioning device for screw-rotor engagement adjustment

Abstract

The application provides a positioning device for screw rotor meshing adjustment, which comprises a support frame and two locking members. The support frame has contact structures, and the two contact structures are arranged at intervals along a first direction. Each contact structure comprises two contact portions arranged in sequence along a second direction. The locking members correspond to the contact structures one by one, and each locking member is arranged at one end of a contact portion of the corresponding contact structure, which is away from the spiral portion of the screw rotor. The locking member is configured to be connected with the screw rotor and selectively abut against the support frame. According to the technical scheme, the abutment or distance of the locking member and the support frame can be selected according to the assembly requirement, so as to quickly realize the locking and unlocking of the screw rotor relative to the support frame, thereby improving the adjustment efficiency of the screw rotor and the assembly efficiency of the vacuum pump.

Description

Technical Field

[0001] This application relates to the field of vacuum equipment technology, and in particular to a positioning device for adjusting the meshing of a screw rotor. Background Technology

[0002] Vacuum equipment comes in various types, which can be categorized into rough vacuum equipment, medium vacuum equipment, and high vacuum equipment based on their vacuum level range. Medium vacuum equipment is primarily used to achieve a vacuum level of 10... 2 ~10 -1 Equipment requiring high pressure (P) such as twin-screw vacuum pumps. Twin-screw vacuum pumps are a type of oil-free dry vacuum pump that operates without the need for a working fluid (such as oil or water) for sealing, allowing direct gas extraction and avoiding contamination of the pumped medium. The core component of a twin-screw vacuum pump is a pair of screw rotors coupled together within the pump chamber.

[0003] In related technologies, the screw rotor is provided with helical grooves, and along the axis of the screw rotor, the width of the helical grooves gradually decreases from the air inlet to the exhaust outlet. When the two screw rotors rotate synchronously in opposite directions, the gas to be pumped enters the pump chamber from the air inlet under the action of pressure difference, and moves towards the exhaust outlet as the screw rotors rotate. As the width of the helical grooves gradually decreases with distance from the air inlet, the volume corresponding to each pitch of the helical groove gradually decreases, thereby gradually compressing the gas. Finally, the compressed gas is discharged from the pump chamber through the exhaust outlet.

[0004] The adjustment and installation of the coupling position between the two screw rotors of a screw vacuum pump is a core factor affecting its stable and efficient operation. Therefore, the fit clearance between the screw rotors is extremely important. To ensure good rotor rotation during operation, it is necessary to adjust the axial positioning (i.e., determining the axial installation position of each screw rotor), the axial end face positioning of each screw rotor, the radial positioning (i.e., the distance between the two screw rotors), and the circumferential positioning (i.e., the circumferential angle of the helical surfaces of the two screw rotors) of each screw rotor. However, current devices for adjusting the screw rotor coupling position are cumbersome to operate, resulting in low assembly efficiency of screw vacuum pumps. Utility Model Content

[0005] This application provides a positioning device for adjusting the meshing of a screw rotor, which can improve the ease of adjusting the clearance of a screw vacuum pump and the assembly efficiency of the screw vacuum pump, thereby at least solving the above-mentioned technical problems.

[0006] To achieve the above objectives, this application provides a positioning device for adjusting the meshing of a screw rotor. The positioning device includes a support frame and two locking members. The support frame has two contact structures spaced apart along a first direction, and each contact structure includes two contact portions arranged sequentially along a second direction. Each contact portion is configured to contact the outer circumferential surface of the shaft portion at both ends of a screw rotor. The locking members correspond one-to-one with the contact structures, and each locking member is located at one end of a contact portion of the corresponding contact structure, away from the helical portion of the screw rotor. The locking members are configured to connect to the screw rotor and selectively abut against the support frame. The first direction is parallel to the radial direction of the screw rotor, and the second direction is parallel to the axial direction of the screw rotor.

[0007] Optionally, the locking element includes a locking nut configured to be threaded onto the shaft end of the screw rotor and selectively abut against the support frame.

[0008] Optionally, the locking element includes a first ferrule and a locking nut, the first ferrule being configured to fit onto the shaft end of the screw rotor, the locking nut being threaded onto the first ferrule, and the locking nut being configured to selectively abut against the support frame.

[0009] Optionally, the locking element also includes a roller configured to fit onto the shaft end of the screw rotor.

[0010] Optionally, the rotating wheel is fitted onto the first ferrule.

[0011] Optionally, the outer circumferential surface of the first sleeve is symmetrically provided with two first planes along its own axis, and the inner circumferential surface of the rotating wheel is correspondingly provided with two second planes adapted to the first planes. The connection and circumferential positioning of the rotating wheel (124) and the first sleeve (122) are realized through the contact between the first plane and the second plane.

[0012] Optionally, the support frame includes a first end plate, a second end plate, and a plurality of support plates. The first end plate and the second end plate are arranged opposite to each other and are connected and fixed to each other by the plurality of support plates. The first end plate has a positioning end face, which is configured to contact the rotor end face of the screw rotor. A contact portion of each contact structure is disposed on the first end plate, and another contact portion of each contact structure is disposed on the second end plate.

[0013] Optionally, positioning grooves are provided at the positions of the support plate opposite to the first end plate and the second end plate, and the first end plate and the second end plate are respectively inserted into the corresponding positioning grooves.

[0014] Optionally, it also includes a rib and a connector, the connector being disposed between the support plates, the connector being disposed on the side of the first end plate near the second end plate, and the rib connecting the connector and the second end plate.

[0015] Optionally, the contact portion is a semi-circular through groove.

[0016] In the positioning device for adjusting the screw rotor engagement according to the embodiments of this application, by connecting the locking member to the screw rotor and selectively abutting the locking member to the support frame, the locking member can be selected to abut against the support frame or move away from the support frame according to assembly requirements, so as to quickly lock and unlock the screw rotor relative to the support frame, thereby improving the adjustment efficiency of the screw rotor and improving the assembly efficiency of the vacuum pump.

[0017] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0019] Figure 1 This is a schematic diagram of the positioning device for adjusting screw rotor engagement provided in an exemplary embodiment of this application; Figure 2 This is a schematic diagram of the positioning device for adjusting screw rotor engagement from another perspective, provided in an exemplary embodiment of this application. Figure 3 This is a schematic diagram of the engagement between the positioning device for adjusting the screw rotor meshing provided in an exemplary embodiment of this application and the screw rotor; Figure 4 This is a schematic diagram of the structure of the locking member provided in an exemplary embodiment of this application; Figure 5 yes Figure 4 Sectional view of AA; Figure 6 This is a schematic diagram of the structure of the support plate provided in an exemplary embodiment of this application; Figure 7 This is a schematic diagram of the structure of the connector provided in an exemplary embodiment of this application.

[0020] Explanation of reference numerals in the attached figures: 10 - Positioning device for adjusting screw rotor meshing; 11-Support frame; 111-First end plate; 112-Second end plate; 113-Rib plate; 114-Stop block; 1141-Positioning end face; 115-Connector; 1151-Mounting groove; 1152-Allowing groove; 1153-Overlap groove; 116-Support plate; 1161-Positioning groove; 117-Contact structure; 118-Contact part; 119-Slot; 12-Locking element; 121-Locking nut; 122-First ferrule; 1221-First threaded hole; 1222-First flat surface; 123-First screw; 124-Rotating wheel; 1241-Second flat surface; 1242-Second threaded hole; 1243-Oval hole; 125-Second screw; 30 - Screw rotor; 31 - Rotor end face; 32 - Shaft end. Detailed Implementation

[0021] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0022] Before introducing the positioning device for adjusting screw rotor engagement provided in the embodiments of this application, the relevant technologies of this application will be introduced first.

[0023] In related technologies, in order to ensure good rotation of the screw rotor when the screw vacuum pump is working, it is necessary to adjust the axial positioning of each screw rotor (i.e., the axial installation position of the screw rotor), the axial end face positioning of each screw rotor, the radial positioning between two mating screw rotors (i.e., the distance between the two screw rotors), and the circumferential positioning between two mating screw rotors (i.e., the circumferential angle of the helical surfaces of the two screw rotors) so that the mutual coupling relationship between the two screw rotors reaches an ideal matching state, so that the two screw rotors can operate stably.

[0024] During adjustment, the axial positioning, axial end face positioning, and radial positioning between the two screw rotors can be quickly determined by the mating position between the tooling supporting the screw rotor and the screw rotor. However, for circumferential positioning, it is necessary to first determine the preliminary mating position based on the mutual coupling relationship of the two screw rotors. Then, lock the two screw rotors relative to the tooling and connect the motor to the screw rotor drive. Next, release the lock between the screw rotors and the tooling, allowing the motor to drive the two screw rotors to rotate relative to the tooling, simulating the rotation of the two coupled screw rotors under the working state of a screw pump. Based on the coupling situation under the simulated working state, it can be determined whether the circumferential angle between the two screw rotors needs adjustment. If adjustment is required, turn off the motor and rotate one screw rotor around its axis to adjust the circumferential angle of the mutual mating of the helical surfaces between the two screw rotors, thereby improving the coupling gap deviation between the two rotors and correcting accumulated machining and assembly errors. Repeat the above steps until the coupling relationship between the two screws under the simulated working state reaches an ideal fit, and the two screw rotors operate smoothly without jamming or wear.

[0025] In related technologies, there are various locking components for locking and unlocking the screw rotor relative to the tooling, such as hydraulic expansion sleeves. The hydraulic expansion sleeve is fixed to the tooling and sleeved on the shaft end of the screw rotor mounted on the tooling. Locking and unlocking of the screw rotor relative to the tooling is achieved by filling and draining the hydraulic expansion sleeve. This fixing method involves numerous components and a complex structure, and the locking and unlocking of the screw rotor relies on a hydraulic circuit, resulting in low operational efficiency and consequently low assembly efficiency of the screw vacuum pump. Furthermore, some related technologies fix the locking component for locking the screw rotor to a support frame and selectively abut against the screw rotor. However, to reduce the impact on the screw rotor surface of the locking component, the fit between the locking component and the screw rotor requires high precision and is difficult to operate, further affecting operational efficiency and hindering efficient assembly of the screw vacuum pump.

[0026] Based on this, embodiments of this application provide a positioning device for adjusting the engagement of a screw rotor, which can quickly lock and unlock the screw rotor to improve the adjustment efficiency of the screw rotor, thereby improving the assembly efficiency of the vacuum pump.

[0027] The following combination Figures 1 to 6 This application provides a detailed description of a positioning device 10 for adjusting screw rotor engagement, as provided in an embodiment of the present application.

[0028] Please see Figure 1 and Figure 2In a first aspect, embodiments of this application provide a positioning device 10 for adjusting the engagement of a screw rotor. The positioning device 10 includes a support frame 11 and two locking members 12. The support frame 11 has two contact structures 117. The two contact structures 117 are spaced apart along a first direction. Each contact structure 117 includes two contact portions 118 arranged sequentially along a second direction. The contact portions 118 in each contact structure 117 are configured to contact the outer circumferential surfaces of the shaft portions at both ends of a screw rotor 30. The locking members 12 correspond one-to-one with the contact structures 117. Each locking member 12 is disposed at one end of a contact portion 118 of the corresponding contact structure 117, away from the helical portion of the screw rotor 30. The locking member 12 is configured to connect to the screw rotor 30 and selectively abut against the support frame 11. The first direction is parallel to the radial direction of the screw rotor 30, and the second direction is parallel to the axial direction of the screw rotor 30.

[0029] Specifically, the contact portion 118 in each contact structure 117 is configured to contact the outer circumferential surface of the shaft end 32 of a screw rotor 30.

[0030] It is understood that the positioning device 10 for adjusting the screw rotor engagement is used when assembling a screw vacuum pump, which has two screw rotors 30. Correspondingly, the support frame 11 has two contact structures 117. One contact structure 117 engages with one screw rotor 30, and the other contact structure 117 engages with the other screw rotor 30.

[0031] It can be understood that by supporting both ends of each screw rotor 30, the screw rotor 30 can be positioned. Correspondingly, each contact structure 117 may include two contact portions 118, which respectively cooperate with both ends of the screw rotor 30.

[0032] The contact portion 118 can be a hole. Correspondingly, one end of each screw rotor 30 passes through a hole in a contact structure 117, and the other end of the screw rotor 30 passes through another hole in the contact structure 117.

[0033] For example, the contact portion 118 can be a groove, and the groove ends of the two grooves of each contact portion 118 that are close to each other are open structures. In this case, one end of each screw rotor 30 is inserted into one groove of a contact structure 117, and the other end of the screw rotor 30 is inserted into the other groove of the contact structure 117, such as... Figure 3 As shown.

[0034] For example, the locking member 12 can be a nut, which is threaded onto the screw rotor 30. The nut can be rotated relative to the screw rotor 30 to move the nut closer to or away from the support frame 11, thereby increasing the resistance to the free rotation of the screw rotor 30 or facilitating the rotation of the screw rotor 30.

[0035] As another example, the locking element 12 can be a combination of a pin and a handwheel. The handwheel is fixed to the screw rotor 30, and the two ends of the pin are respectively inserted into the handwheels of the two screw rotors 30, thereby increasing the resistance to the free rotation of the screw rotors 30 and limiting the relative rotation between the two screw rotors 30.

[0036] As another example, the locking element 12 can be a combination of a screw and a bracket. Specifically, the bracket is fixed to the screw rotor 30, and the screw is threadedly connected to the bracket. Rotating the screw relative to the bracket can cause the end of the screw shank to abut against the support frame 11 or the screw to move away from the support frame 11, thereby increasing the resistance to the free rotation of the screw rotor 30 or facilitating the rotation of the screw rotor 30.

[0037] It is understood that the locking element 12 can also be a clip, hook, or other structure, and the embodiments of this application do not limit this.

[0038] It can be understood that by setting the spacing between the contact portions 118 in each contact structure 117, the axial positioning of the screw rotor 30 can be achieved through the cooperation between each screw rotor 30 and the contact portion 118 in the contact structure 117.

[0039] It is understandable that by machining the surface of the support frame 11 that contacts the rotor end face 31 of the screw rotor 30 to meet the requirements such as flatness, the axial end face positioning of the screw rotor 30 can be achieved when the surface of the support frame 11 contacts the rotor end face 31.

[0040] It can be understood that by setting the spacing between the two contact structures 117 in the first direction, the two screw rotors 30 can be radially positioned between them by cooperating with the two contact structures 117 respectively.

[0041] The circumferential positioning between the two cooperating screw rotors 30 can be adjusted in the following way: First, the two screw rotors 30 are fitted to the support frame 11, and the locking member 12 is connected to the screw rotors 30, so that the two screw rotors 30 respectively engage with the two contact structures 117, thus initially fitting the two screw rotors 30 together. Next, the locking member 12 abuts against the support frame 11, thereby increasing the resistance to the free rotation of the screw rotors 30 and preventing the screw rotors 30 from rotating relative to the support frame 11. Then, the motor is connected to the two screw rotors 30, and the position of the locking member 12 is adjusted so that the locking member 12 is away from the support frame 11. Then, the motor is started to drive the two screw rotors 30 to rotate synchronously in opposite directions, so that the screw rotors 30 simulate the rotation under the working state of a screw pump. Based on the coupling situation under the simulated working state, it is determined whether the circumferential angle between the two screw rotors 30 needs to be adjusted. If adjustment is needed, the motor is turned off, and one of the screw rotors 30 is rotated around its axis, thereby adjusting the circumferential angle of the mutual engagement of the helical surfaces between the two screw rotors 30, so as to improve the coupling gap deviation between the two rotors and correct the cumulative errors in machining and assembly. The above steps are then repeated until the coupling relationship between the two screws in the simulated working state reaches an ideal fit, and the two screw rotors 30 operate smoothly without jamming or wear. Finally, the locking piece 12 is abutted against the support frame 11 to prevent the screw rotor 30 from rotating relative to the support frame 11, and the screw rotor 30 fixed relative to the support frame 11 is transferred to the pump casing of the screw pump using lifting tools for subsequent assembly.

[0042] In this embodiment, by connecting the locking member 12 to the screw rotor 30 and selectively abutting the locking member 12 against the support frame 11, the locking member 12 can be selected to abut against the support frame 11 or move away from the support frame 11 according to assembly requirements, so as to quickly lock and unlock the screw rotor 30 relative to the support frame 11, thereby improving the adjustment efficiency of the screw rotor 30 and the assembly efficiency of the vacuum pump.

[0043] It is understandable that, compared to the method of connecting the locking member 12 to the support frame 11 and selectively abutting against the screw rotor 30, in this embodiment, after connecting the locking member 12 to the screw rotor 30, the locking and unlocking of the screw rotor 30 relative to the support frame 11 is achieved by adjusting the engagement state between the locking member 12 and the support frame 11. When adjusting the engagement state between the locking member 12 and the support frame 11, there is no impact on the surface of the screw rotor 30, thereby reducing the requirements and operational difficulty of adjusting the engagement state of the locking member 12, which helps to improve the efficiency of operating the locking member 12, thereby improving the assembly efficiency of the screw vacuum pump.

[0044] Please see Figure 2 and Figure 4In some embodiments, the locking member 12 includes a locking nut 121. The locking nut 121 is configured to be threaded onto the shaft end 32 of the screw rotor 30 and selectively abut against the support frame 11. This makes the locking member 12 simple in structure and easy to adjust, and also provides a large contact area when the locking member 12 abuts against the support frame 11, thereby improving the reliability of the abutment between the locking member 12 and the support frame 11.

[0045] For example, a rubber pad is provided on the surface where the locking nut 121 abuts against the support frame 11, which increases the friction between the locking nut 121 and the support frame 11, thereby increasing the resistance to the free rotation of the screw rotor 30 and improving the positional stability of the screw rotor 30 relative to the support frame 11.

[0046] Please see Figure 2 and Figure 4 In some embodiments, the locking member 12 includes a first ferrule 122 and a locking nut 121. The first ferrule 122 is configured to fit onto the shaft end 32 of the screw rotor 30. The locking nut 121 is threaded onto the first ferrule 122. The locking nut 121 is configured to selectively abut against the support frame 11. This avoids machining threads on the shaft end 32 of the screw rotor 30, thereby helping to ensure the integrity of the screw rotor 30 surface and improving the reliability of the screw vacuum pump.

[0047] The first ferrule 122 can be glued, snapped, screwed, or spot-welded to the locking member 12.

[0048] Please see Figure 5 In some embodiments, the locking member 12 includes a first screw 123. A first ferrule 122 is provided with a first threaded hole 1221. The shank of the first screw 123 is threaded into the first threaded hole 1221. The end of the shank of the first screw 123 is configured to abut against the screw rotor 30. This simplifies the connection structure between the first ferrule 122 and the screw rotor 30, making assembly easier and improving the assembly efficiency of the screw vacuum pump. Simultaneously, it prevents circumferential rotation of the first ferrule 122 relative to the screw rotor 30, thereby improving the reliability of the connection between the first ferrule 122 and the screw rotor 30.

[0049] Please see Figure 2 and Figure 4 In some embodiments, the locking member 12 further includes a rotating wheel 124. The rotating wheel 124 is configured to fit onto the shaft end 32 of the screw rotor 30. Thus, when adjusting the circumferential positioning between the two mating screw rotors 30, the rotating wheel 124 can be rotated to drive the screw rotor 30 to rotate, thereby increasing the lever arm acting on the screw rotor 30, increasing the torque, and reducing the difficulty of rotating the screw rotor 30, thereby improving assembly efficiency.

[0050] It is understandable that the larger the outer diameter of the rotor 124, the larger the lever arm of rotating the screw rotor 30, and the smaller the force required to rotate the screw rotor 30.

[0051] Please see Figure 2 and Figure 4 In some embodiments, the rotating wheel 124 is fitted onto the first retaining sleeve 122. One end of the first retaining sleeve 122 is threadedly connected to the locking nut 121, and the other end of the first retaining sleeve 122 is connected to the rotating wheel 124.

[0052] It is understood that, through the above settings, the first ferrule 122 connected to the locking nut 121 can be used to install the rotor 124, avoiding the need to machine the structure connected to the rotor 124 on the surface of the screw rotor 30, so as to ensure the integrity of the surface of the screw rotor 30 and thus improve the reliability of the screw vacuum pump.

[0053] Please see Figure 4 In some embodiments, the outer circumferential surface of the first retaining sleeve 122 is symmetrically provided with two first planes 1222 along its own axis. The inner circumferential surface of the rotating wheel 124 is correspondingly provided with two second planes 1241 adapted to the first planes 1222. The rotating wheel 124 is connected to the first retaining sleeve 122 and circumferentially positioned by contact between the first planes 1222 and the second planes 1241. In this way, the rotating wheel 124 and the first retaining sleeve 122 are circumferentially stopped to prevent the rotating wheel 124 from rotating relative to the first retaining sleeve 122, thereby improving the synchronization between the rotating wheel 124 and the first retaining sleeve 122, which facilitates the ease of operation of rotating the screw rotor 30 to adjust the circumferentially mating position.

[0054] It can be understood that the first plane 1222 and the second plane 1241 are in surface-to-surface contact.

[0055] Please see Figure 4 The first ferrule 122 has two first planes 1222, and the rotating wheel 124 has two second planes 1241, with each of the two second planes 1241 contacting a first plane 1222. This improves the synchronicity between the rotating wheel 124 and the first ferrule 122, thereby facilitating the easy operation of adjusting the circumferential fit position by rotating the screw rotor 30.

[0056] For example, the two first planes 1222 are symmetrically arranged about the axis of the first sleeve 122. In this way, the structural symmetry of the locking member 12 can be improved, which helps to improve the stress state of the structural member.

[0057] Please see Figure 5In some embodiments, the locking member 12 further includes a second screw 125. The rotating wheel 124 is provided with a second threaded hole 1242. The shank of the second screw 125 is threaded into the second threaded hole 1242. The end of the shank of the second screw 125 abuts against the first retaining sleeve 122. In this way, the connection structure between the first retaining sleeve 122 and the rotating wheel 124 is simple and easy to assemble, thereby improving the assembly efficiency of the screw vacuum pump; at the same time, it can also prevent the rotating wheel 124 from rotating circumferentially relative to the first retaining sleeve 122, thereby improving the reliability of the connection between the rotating wheel 124 and the first retaining sleeve 122.

[0058] Please see Figure 4 In some embodiments, the rotor 124 is provided with a plurality of oblong holes 1243, which are arranged sequentially along the circumference of the rotor 124. In this way, the rotor 124 can have a larger outer diameter to increase the lever arm, while reducing the amount of material used in the rotor 124 and improving the economy of the positioning device 10 for adjusting the screw rotor engagement.

[0059] Please see Figure 1 and Figure 2 In some embodiments, the support frame 11 includes a first end plate 111, a second end plate 112, and a plurality of support plates 116. The first end plate 111 and the second end plate 112 are disposed opposite to each other and are connected and fixed to each other by the plurality of support plates 116. The first end plate 111 has a positioning end face 1141. The positioning end face 1141 is configured to contact the rotor end face 31 of the screw rotor 30. One contact portion 118 of each contact structure 117 is disposed on the first end plate 111. The other contact portion 118 of each contact structure 117 is disposed on the second end plate 112. In this way, the support frame 11 has a simple and robust structure, which helps to improve the reliability of the support frame 11 in supporting and positioning the screw rotor 30.

[0060] Among them, the positioning end face 1141 is machined with high precision so that when the positioning end face 1141 contacts the rotor end face 31, the axial end face positioning of the screw rotor 30 is achieved.

[0061] For example, the flatness of the positioning end face 1141 is 0.01 mm to 0.05 mm. For instance, the flatness of the positioning end face 1141 is 0.02 mm.

[0062] For example, the support frame 11 includes two support plates 116, which are symmetrically arranged.

[0063] For example, both the first end plate 111 and the second end plate 112 are inserted into the support plate 116.

[0064] Specifically, a plurality of support plates 116 are arranged sequentially along the first direction and configured to be located at the end of the first end plate 111 and the second end plate 112 away from the screw rotor 30, and the support plates 116 connect the first end plate 111 and the second end plate 112.

[0065] Please see Figure 6 The support plate 116 has positioning grooves 1161 at the locations opposite to the first end plate 111 and the second end plate 112. The first end plate 111 and the second end plate 112 are respectively inserted into their corresponding positioning grooves 1161. This allows the first end plate 111 to engage with the side walls of the positioning groove 1161 along the second direction, thus positioning the first end plate 111 relative to the support plate 116. Similarly, the second end plate 112 engages with the side walls of the positioning groove 1161 along the second direction, thus positioning the second end plate 112 relative to the support plate 116. This allows the distance between the first end plate 111 and the second end plate 112 to be determined, thereby determining the distance between the contact portions 118 in each contact structure 117. Through the engagement of each screw rotor 30 with the contact portion 118 in the contact structure 117, the axial positioning of the screw rotor 30 is achieved.

[0066] Specifically, slots 119 are provided on the surfaces of the first end plate 111 and the second end plate 112 facing the support plate 116, and a portion of the support plate 116 is inserted into the slots 119.

[0067] The slots 119 of the first end plate 111 and the second end plate 112 are connected to the corresponding positioning slots 1161 of the support plate 116, thereby making the first end plate 111 and the second end plate 112 stop and cooperate with the support plate 116 along the second direction to improve the structural stability of the positioning device 10 for adjusting the screw rotor meshing.

[0068] Please see Figure 1 and Figure 2 In some embodiments, the positioning device 10 for adjusting the screw rotor engagement further includes a rib 113 and a connector 115. The connector 115 is disposed between the support plates 116 and is located on the side of the first end plate 111 near the second end plate 112. The rib 113 connects the connector 115 and the second end plate 112. Thus, after a pair of screw rotors 30 are adjusted into position, the pair of rotors 30 can be lifted by lifting the rib 113, the connector 115, and the second end plate 112, thereby improving the assembly efficiency of the screw vacuum pump.

[0069] The support plate 116 is configured as two, and multiple ribs 113 are disposed between the two support plates 116.

[0070] Specifically, the connector 115 is connected to the first end plate 111, and the connector 115 is inserted into the positioning groove 1161 corresponding to the first end plate 111, thereby positioning the first end plate 111 through the cooperation of the connector 115 and the positioning groove 1161. Correspondingly, a stop 114 is provided at the end of the support plate 116 located on the first end plate 111 away from the second end plate 112, and the stop 114 contacts the side of the first end plate 111 away from the second end plate 112. In this way, the positional stability of the first end plate 111 relative to the support plate 116 can be improved.

[0071] Please see Figure 1 and Figure 7 In some embodiments, the connector 115 is provided with a mounting groove 1151. A portion of the first end plate 111 is located within the mounting groove 1151. This increases the mating area between the connector 115 and the first end plate 111, thereby improving the reliability of the connection between the first end plate 111 and the connector 115.

[0072] Please see Figure 1 and Figure 7 In some embodiments, the connector 115 is configured with a clearance groove 1152 on its surface facing the screw rotor 30. The groove wall of the clearance groove 1152 has an overlapping groove 1153. One end of the rib 113 is located within the overlapping groove 1153. This increases the mating area between the rib 113 and the connector 115, improving the connection reliability between them. Furthermore, the overlapping groove 1153 allows for quick positioning of the rib 113, improving the assembly efficiency of the screw rotor meshing adjustment positioning device 10.

[0073] Please see Figure 1 and Figure 2 In some embodiments, the contact portion 118 is a semi-circular through slot. This allows the screw rotor 30 to be directly hoisted onto the support frame 11 from top to bottom after the support frame 11 is assembled. Compared to a hole-shaped contact portion 118, the semi-circular through slot structure simplifies the fit between the screw rotor 30 and the support frame 11, improving the ease of installation of the screw rotor 30 onto the support frame 11.

[0074] Please see Figure 1 and Figure 2 In some embodiments, both the contact structure 117 and the locking member 12 are provided in pairs, and each contact structure 117 includes two contact portions 118 arranged sequentially along the second direction. In this way, the positioning device 10 for adjusting the screw rotor engagement can support a pair of screw rotors 30, and the positioning device 10 for adjusting the screw rotor engagement has a simple structure and no redundant design.

[0075] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0076] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0077] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0078] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A positioning device (10) for adjusting the meshing of a screw rotor, characterized in that, include: A support frame (11) has two contact structures (117) spaced apart along a first direction. Each contact structure (117) includes two contact portions (118) arranged sequentially along a second direction. Each contact portion (118) in each contact structure (117) is configured to contact the outer circumferential surface of the shaft portion at both ends of a screw rotor (30). Two locking members (12) are provided, each corresponding to one of the contact structures (117). Each locking member (12) is disposed at one end of a contact portion (118) of the corresponding contact structure (117) away from the helical portion of the screw rotor (30). The locking member (12) is configured to connect to the screw rotor (30) and selectively abut against the support frame (11). The first direction is parallel to the radial direction of the screw rotor (30), and the second direction is parallel to the axial direction of the screw rotor (30).

2. The positioning device (10) for adjusting screw rotor engagement according to claim 1, characterized in that, The locking element (12) includes a locking nut (121) configured to be threaded onto the shaft end (32) of the screw rotor (30) and selectively abut against the support frame (11).

3. The positioning device (10) for adjusting screw rotor engagement according to claim 1, characterized in that, The locking member (12) includes a first sleeve (122) and a locking nut (121). The first sleeve (122) is configured to be sleeved on the shaft end (32) of the screw rotor (30). The locking nut (121) is threaded onto the first sleeve (122) and is configured to selectively abut against the support frame (11).

4. The positioning device (10) for adjusting screw rotor engagement according to claim 3, characterized in that, The locking member (12) also includes a rotating wheel (124) configured to be sleeved on the shaft end (32) of the screw rotor (30).

5. The positioning device (10) for adjusting screw rotor engagement according to claim 4, characterized in that, The rotating wheel (124) is fitted onto the first ferrule (122).

6. The positioning device (10) for adjusting screw rotor engagement according to claim 5, characterized in that, The outer circumferential surface of the first sleeve (122) is symmetrically provided with two first planes (1222) along its own axis. The inner circumferential surface of the rotating wheel (124) is provided with two second planes (1241) that are adapted to the first planes (1222). The rotating wheel (124) is connected to the first sleeve (122) and circumferentially positioned by contact between the first planes (1222) and the second planes (1241).

7. The positioning device (10) for adjusting screw rotor engagement according to any one of claims 1 to 5, characterized in that, The support frame (11) includes a first end plate (111), a second end plate (112), and a plurality of support plates (116). The first end plate (111) and the second end plate (112) are arranged opposite to each other and are connected and fixed to each other by the plurality of support plates (116). The first end plate (111) has a positioning end face (1141), which is configured to contact the rotor end face (31) of the screw rotor (30). In this embodiment, one contact portion (118) of each contact structure (117) is disposed on the first end plate (111), and the other contact portion (118) of each contact structure (117) is disposed on the second end plate (112).

8. The positioning device (10) for adjusting screw rotor engagement according to claim 7, characterized in that, Positioning grooves (1161) are provided on the support plate (116) at the locations opposite to the first end plate (111) and the second end plate (112), and the first end plate (111) and the second end plate (112) are respectively inserted into the corresponding positioning grooves (1161).

9. The positioning device (10) for adjusting screw rotor engagement according to claim 7, characterized in that, It also includes a rib (113) and a connector (115), the connector (115) being disposed between the support plates (116), the connector (115) being disposed on the side of the first end plate (111) near the second end plate (112), and the rib (113) connecting the connector (115) and the second end plate (112).

10. The positioning device (10) for adjusting screw rotor engagement according to any one of claims 1 to 5, characterized in that, The contact portion (118) is a semi-circular through groove.

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