Roots rotor meshing device

Abstract

The utility model relates to a roots rotor meshing device. The device is characterized by comprising a gear box device, a tensioning device, a tailstock device and a bottom frame device, the gear box device comprises a gear box body, a gear box cover plate, a driving clamping mechanism, a driven clamping mechanism and a gear box hand wheel, and the tensioning device comprises two hydraulic tensioning sleeves with set screws. The tail frame device comprises a tail frame shell and two tip clamping mechanisms, each tip clamping mechanism comprises a tail frame hand wheel, a tail frame tip, a tip sleeve, a tip seat, a tail frame set screw, a tail frame bearing, a tail frame cover plate and a tail frame hand wheel shaft, the bottom frame device comprises a bottom plate and a measuring plate, and the measuring plate is installed on the bottom plate. The gearbox device and the tailstock device are both installed on the bottom plate and located on the two sides of the measuring plate respectively. The positioning and meshing device is reasonable in structural design, and two roots rotors can be positioned and meshed.

Description

Technical Field

[0001] The utility model relates to a Roots rotor meshing device, which is mainly used for rotor meshing detection of a straight groove ∞-shaped Roots rotor before assembly. Background Art

[0002] After the tooth surface of the Roots rotor is processed, the outer contour of the tooth surface often has some processing deviations due to various reasons. When the Roots vacuum pump main unit is running, there needs to be a certain tooth surface gap between the two meshing Roots rotors to ensure that there will be no scratching between the two Roots rotors when the volume expands slightly due to the temperature increase when the vacuum pump main unit is working, and at the same time ensure that the unit meets the vacuum extraction capacity required by the design, that is, to ensure that the vacuum degree meets the design requirements.

[0003] If the Roots vacuum pump host is tested for Roots rotor engagement before assembly, the problem of poor clearance of the Roots rotor during assembly can be greatly reduced, the assembly efficiency can be improved, the quality and reliability of the Roots vacuum pump host can be improved, and thus the overall performance of the Roots vacuum pump host can be improved.

[0004] At present, when the meshing inspection of the processed Roots rotors is carried out, there is no Roots rotor meshing device with a reasonable structure design for positioning and meshing the two Roots rotors, resulting in low accuracy of the Roots rotor meshing inspection, and even causing unpaired rotors to flow into the subsequent assembly, resulting in the inability to debug the tooth gap required by the design when assembling the Roots pump host. The host needs to be dismantled and a suitable Roots rotor needs to be re-selected, resulting in a lot of waste of time and resources. Utility Model Content

[0005] The utility model aims to overcome the above-mentioned deficiencies in the prior art and to provide a Roots rotor meshing device which has a reasonable structural design and can position and mesh two Roots rotors.

[0006] The technical solution adopted by the utility model to solve the above-mentioned problem is: the structural characteristics of the Roots rotor meshing device are: it includes a gear box device, a tensioning device, a tail frame device and a base frame device, the gear box device includes a gear box body, a gear box cover plate, an active clamping mechanism, a driven clamping mechanism and a gear box handwheel, the active clamping mechanism includes an active clamping shaft, a No. 1 bearing, an active gear, a No. 2 bearing, an active bearing cover plate and an active top, the active clamping shaft is rotatably mounted on the gear box body through the No. 1 bearing and the No. 2 bearing, the active bearing cover plate is fixed on the gear box body and cooperates with the No. 2 bearing, the active top is fixed At one end of the active clamping shaft, the gear box handwheel is fixed to the other end of the active clamping shaft, and the active gear is fixed to the active clamping shaft; the driven clamping mechanism includes a driven clamping shaft, a No. 3 bearing, a driven gear, a No. 4 bearing, a driven bearing cover plate and a driven top, the driven clamping shaft is rotatably mounted on the gear box body through the No. 3 bearing and the No. 4 bearing, the driven bearing cover plate is fixed to the gear box body and cooperates with the No. 4 bearing, the driven top is fixed to one end of the driven clamping shaft, the driven gear is fixed to the driven clamping shaft, and the driven gear is meshed with the active gear; the gear box cover plate is fixed to the gear box body;

[0007] The tensioning device includes two hydraulic tensioning sleeves with set screws, one hydraulic tensioning sleeve is fixed on the active top of the gearbox device, and the other hydraulic tensioning sleeve is fixed on the driven top of the gearbox device;

[0008] The tailstock device comprises a tailstock housing and two top clamping mechanisms, each top clamping mechanism comprises a tailstock handwheel, a tailstock top, a top sleeve, a top seat, a tailstock set screw, a tailstock bearing, a tailstock cover plate and a tailstock handwheel shaft, the top seat is fixed on the tailstock housing, the tailstock handwheel shaft is rotatably mounted on the top seat through the tailstock bearing, the tailstock cover plate is fixed on the top seat and cooperates with the tailstock bearing, the tailstock handwheel is fixed to one end of the tailstock handwheel shaft, the other end of the tailstock handwheel shaft is provided with a screw structure with an external thread, one end of the top sleeve is provided with a threaded hole with an internal thread, the side wall of the top sleeve is provided with a guide groove, the tailstock top is fixed to the other end of the top sleeve, the top sleeve is slidably mounted on the top seat, the top sleeve is threadedly connected with the screw structure on the tailstock handwheel shaft through a threaded hole at one end, the tailstock set screw is fixed in the top seat, and the convex portion of the tailstock set screw is located in the guide groove of the top sleeve;

[0009] The base frame device includes a base plate and a measuring plate, the measuring plate is mounted on the base plate, the gear box device and the tail frame device are both mounted on the base plate, the gear box device and the tail frame device are respectively located on both sides of the measuring plate, the active top is aligned with one tail frame top, and the driven top is aligned with another tail frame top.

[0010] Preferably, the chassis device of the utility model also includes several T-blocks and several locating keys, at least two grooves are opened on the bottom plate, the T-blocks and the locating keys are both located in the grooves of the bottom plate, the gear box device is installed on the bottom plate through the T-blocks and the locating keys, and the tail frame device is installed on the bottom plate through the T-blocks and the locating keys.

[0011] Preferably, the measuring plate of the utility model is installed on the bottom plate through a T-block and a positioning key.

[0012] Preferably, the active clamping mechanism of the utility model further comprises an active round nut, and the active gear is fixed on the active clamping shaft via the active round nut.

[0013] Preferably, the driven clamping mechanism of the utility model further comprises a driven circular nut, and the driven gear is fixed on the driven clamping shaft via the driven circular nut.

[0014] A Roots rotor meshing detection method is characterized in that: using the Roots rotor meshing device, the steps of the Roots rotor meshing detection method are as follows:

[0015] Take two Roots rotors to be tested, place one Roots rotor in a horizontal state, place a lever gauge on a measuring plate to measure the profile surface of the horizontal Roots rotor, so that the measuring points are at the same height to ensure that the Roots rotor is placed horizontally, and then fix one end of the horizontal Roots rotor on a hydraulic tension sleeve through a set screw, and the other end of the horizontal Roots rotor is pressed against a tailstock top of a tailstock device, and the horizontal Roots rotor is clamped with a tailstock top of the tailstock device through a gear box device, and then the profile surface of the horizontal Roots rotor is measured with a lever gauge;

[0016] After the profile surface of the horizontal Roots rotor is measured, another Roots rotor is placed vertically on the measuring plate, and a lever gauge is placed on the edge of the measuring plate to measure the profile surface of the vertical Roots rotor so that the measuring points are located on the same vertical plane to ensure the vertical placement of the Roots rotor. Then, another hydraulic tensioning sleeve is used to clamp the vertical Roots rotor with the other tailstock top of the tailstock device, and the profile surface of the vertical Roots rotor is measured with a lever gauge.

[0017] After the profile surface of the vertical Roots rotor is measured, the two Roots rotors are meshed; when the Roots rotors are completely clamped and tightened, the gear box handwheel of the gear box device is turned to drive the two Roots rotors to rotate synchronously, and the gap is measured with a feeler gauge. The meshing gaps at multiple positions between the two meshing Roots rotors can be measured to judge whether the two Roots rotors meet the assembly requirements.

[0018] Preferably, when installing two Roots rotors, the utility model installs the Roots rotor on one side first. When the Roots rotor on one side is placed stably and clamped for meter measurement, the Roots rotor on the other side is installed for meter measurement. Two Roots rotors cannot be placed at the same time.

[0019] Compared with the prior art, the utility model has the following advantages and effects: it is conducive to effectively detecting whether the overall contour of the Roots rotor surface is qualified, it is conducive to making the meshing detection of the Roots rotor simpler, more efficient and accurate, and it is conducive to avoiding the situation where the Roots rotor surface flows into the subsequent assembly process due to the poor overall contour of the Roots rotor surface. Turn the tailstock handwheel, the tailstock handwheel is connected to the tailstock handwheel shaft, the threaded end of the tailstock handwheel shaft and the top sleeve are connected by threads, and a guide groove is left on the side of the top sleeve to cooperate with the tailstock set screw to ensure that the top sleeve cannot move circumferentially and can only move axially. When the gearbox device end of the Roots rotor is clamped, turn the tailstock handwheel shaft. Due to the guiding relationship between the tailstock set screw and the guide groove, the top sleeve moves axially, thereby realizing the function of tightening and loosening the Roots rotor, and the clamping of the Roots rotor has good stability, convenient operation, and high coaxiality. The utility model can effectively detect the gaps at various positions of the Roots rotor, reduce the disassembly and rework of the assembler during the assembly process due to the gap not meeting the technical requirements, improve work efficiency, and improve the quality of the Roots vacuum pump host. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model and / or the technical solutions in the prior art, the drawings required for use in the embodiments and / or the description of the prior art 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] Figure 1 It is a three-dimensional structural schematic diagram of a Roots rotor meshing device in an embodiment of the utility model.

[0022] Figure 2 It is a schematic diagram of the top view of the gear box device in the embodiment of the utility model.

[0023] Figure 3 It is a schematic diagram of the internal structure of the gear box device in the embodiment of the utility model.

[0024] Figure 4 It is an enlarged structural schematic diagram of the tensioning device in the embodiment of the utility model.

[0025] Figure 5 It is a structural schematic diagram of the base frame device in the embodiment of the utility model.

[0026] Figure 6It is a top view structural schematic diagram of the tailstock device in the embodiment of the utility model.

[0027] Figure 7 It is a schematic diagram of the internal structure of the tailstock device in the embodiment of the utility model.

[0028] Figure 8 It is a structural schematic diagram of a Roots rotor installed on a Roots rotor meshing device in an embodiment of the utility model.

[0029] In the figure: 1-gearbox device; 2-tensioning device; 3-Roots rotor; 4-tail frame device; 5-base frame device; 11-gearbox housing; 12-gearbox cover plate; 13-active clamping mechanism; 14-passive clamping mechanism; 15-gearbox handwheel; 131-active clamping shaft; 132-No. 1 bearing; 133-active round nut; 134-active gear; 135-No. 2 bearing; 136-active bearing cover plate; 137-active top; 141-passive clamping shaft; 142-No. 3 bearing; 143-passive round nut ;144-driven gear;145-No. 4 bearing;146-driven bearing cover plate;147-driven center pin;21-hydraulic tension sleeve;22-setting screw;41-center pin clamping mechanism;42-tailstock housing;43-tailstock handwheel;411-tailstock center pin;412-center pin sleeve;413-center pin seat;414-tailstock setting screw;415-tailstock bearing;416-tailstock cover plate;417-tailstock handwheel shaft;418-guide groove;51-base plate;52-T-block;53-positioning key;54-measuring plate. DETAILED DESCRIPTION

[0030] The present invention will be further described in detail below with reference to the accompanying drawings and through examples. The following examples are provided to explain the present invention, but the present invention is not limited to the following examples.

[0031] Example

[0032] See also Figures 1 to 8 The Roots rotor meshing device in this embodiment includes a gear box device 1, a tensioning device 2, a tail frame device 4 and a base frame device 5.

[0033] The gearbox device 1 in this embodiment includes a gearbox housing 11, a gearbox cover plate 12, an active clamping mechanism 13, a driven clamping mechanism 14 and a gearbox handwheel 15. The active clamping mechanism 13 includes an active clamping shaft 131, a No. 1 bearing 132, an active round nut 133, an active gear 134, a No. 2 bearing 135, an active bearing cover plate 136 and an active top 137. The active clamping shaft 131 is rotatably mounted on the No. 1 bearing 132 and the No. 2 bearing 135. On the gear box body 11, the active bearing cover plate 136 is fixed on the gear box body 11 and cooperates with the No. 2 bearing 135, the active top 137 is fixed on one end of the active clamping shaft 131, the gear box handwheel 15 is fixed on the other end of the active clamping shaft 131, the active gear 134 is fixed on the active clamping shaft 131, the active round nut 133 is fixed on the active clamping shaft 131, and the active gear 134 is fixed on the active clamping shaft 131 through the active round nut 133.

[0034] The driven clamping mechanism 14 in this embodiment includes a driven clamping shaft 141, a No. 3 bearing 142, a driven round nut 143, a driven gear 144, a No. 4 bearing 145, a driven bearing cover plate 146 and a driven top 147. The driven clamping shaft 141 is rotatably mounted on the gearbox housing 11 through the No. 3 bearing 142 and the No. 4 bearing 145. The driven bearing cover plate 146 is fixed on the gearbox housing 11 and cooperates with the No. 4 bearing 145. The driven top 147 is fixed on one end of the driven clamping shaft 141. The driven gear 144 is fixed on the driven clamping shaft 141. The driven gear 144 is meshed with the driving gear 134. The driven round nut 143 is fixed on the driven clamping shaft 141. The driven gear 144 is fixed on the driven clamping shaft 141 through the driven round nut 143. The gearbox cover plate 12 is fixed on the gearbox housing 11. It can be seen that the active clamping mechanism 13 and the driven clamping mechanism 14 are structurally different only in the two clamping shafts, and the other parts can be the same. The center distance of the internal gears is required to be fixed and rotate synchronously.

[0035] The driving gear 134 and the driven gear 144 in this embodiment are required to be the same type of gears with a fixed center distance. When the gearbox device 1 is working, the gearbox handwheel 15 is connected to the driving clamping shaft 131 through a key, and the driving clamping shaft 131 and the driven clamping shaft 141 are respectively connected to the driving gear 134 and the driven gear 144 through a key, and the driving top 137 and the driven top 147 are respectively located on the driving clamping shaft 131 and the driven clamping shaft 141. When the gearbox handwheel 15 is turned, the gearbox handwheel 15 drives the driving clamping shaft 131 to rotate and drives the driving gear 134 to rotate at the same time. Due to the meshing relationship, the driving gear 134 drives the driven gear 144 to rotate synchronously, thereby driving the driven clamping shaft 141 and the driven top 147 to rotate, thereby completing the synchronous movement inside the gearbox device 1.

[0036] The tensioning device 2 in this embodiment includes two hydraulic tensioning sleeves 21 with set screws 22, one hydraulic tensioning sleeve 21 is fixed on the active top 137 of the gearbox device 1, and the other hydraulic tensioning sleeve 21 is fixed on the driven top 147 of the gearbox device 1. The tensioning device 2 is used to quickly and conveniently clamp or loosen the gearbox end of the Roots rotor 3. When the active top 137 or the driven top 147 is in full contact with the center hole of the Roots rotor 3, the set screw 22 above the hydraulic tensioning sleeve 21 is turned to clamp or loosen the shaft end of the Roots rotor 3.

[0037] The tailstock device 4 in this embodiment includes a tailstock housing 42 and two top clamping mechanisms 41, wherein the structures of the two top clamping mechanisms 41 are exactly the same, and each top clamping mechanism 41 includes a tailstock handwheel 43, a tailstock top 411, a top sleeve 412, a top seat 413, a tailstock set screw 414, a tailstock bearing 415, a tailstock cover plate 416 and a tailstock handwheel shaft 417, the top seat 413 is fixed on the tailstock housing 42, the tailstock handwheel shaft 417 is rotatably mounted on the top seat 413 through the tailstock bearing 415, the tailstock cover plate 416 is fixed on the top seat 413 and cooperates with the tailstock bearing 415, and the tailstock handwheel shaft 417 is fixed on the top seat 413. The wheel 43 is fixed to one end of the tailstock handwheel shaft 417, and the other end of the tailstock handwheel shaft 417 is provided with a screw structure with an external thread, and one end of the top sleeve 412 is provided with a threaded hole with an internal thread, and the side wall of the top sleeve 412 is provided with a guide groove 418, and the tailstock top 411 is fixed to the other end of the top sleeve 412, and the top sleeve 412 is slidably installed on the top seat 413. The top sleeve 412 is threadedly connected with the screw structure on the tailstock handwheel shaft 417 through a threaded hole at one end, and the tailstock fixing screw 414 is fixed in the top seat 413, and the protrusion of the tailstock fixing screw 414 is located in the guide groove 418 of the top sleeve 412.

[0038] When the tailstock device 4 in this embodiment is working, unlike the gearbox device 1, the two top clamping mechanisms 41 can move independently, and there is no synchronous movement relationship between the two top clamping mechanisms 41. The tailstock handwheel 43 is connected to the tailstock handwheel shaft 417 through a key, and the threaded end of the tailstock handwheel shaft 417 and the screw hole end of the top sleeve 412 are connected by threads. A guide groove 418 is left on the side of the top sleeve 412 to cooperate with the tailstock set screw 414 to ensure that the top sleeve 412 cannot move circumferentially but can only move axially. When the Roots rotor 3 is clamped by the end of the gearbox device 1, the tailstock handwheel shaft 417 is rotated. Due to the fixed relationship of the tailstock set screw 414, the top sleeve 412 can only move axially through the threaded connection relationship to tighten and loosen the Roots rotor 3 at the end of the tailstock device 4. The tightening working principle of the two top clamping mechanisms 41 on the tailstock device 4 is the same.

[0039] The chassis device 5 in this embodiment includes a base plate 51 and a measuring plate 54, the measuring plate 54 is mounted on the base plate 51, the gearbox device 1 and the tailstock device 4 are both mounted on the base plate 51, the gearbox device 1 and the tailstock device 4 are respectively located on both sides of the measuring plate 54, the active top 137 and one tailstock top 411 are aligned, and the driven top 147 and another tailstock top 411 are aligned.

[0040] Typically, the base frame device 5 further includes several T-blocks 52 and several positioning keys 53. At least two grooves are formed on the base plate 51. The T-blocks 52 and the positioning keys 53 are both located in the grooves of the base plate 51. The gearbox device 1 is mounted on the base plate 51 through the T-blocks 52 and the positioning keys 53. The tail frame device 4 is mounted on the base plate 51 through the T-blocks 52 and the positioning keys 53. The measuring plate 54 is mounted on the base plate 51 through the T-blocks 52 and the positioning keys 53. Grooving is performed on the base plate 51 to facilitate the placement of the positioning keys 53 and the T-blocks 52, so that the gearbox device 1, the tail frame device 4 and the measuring plate 54 can be better installed and positioned.

[0041] The main purpose of the measuring plate 54 in this embodiment is to be used for the horizontal and vertical placement of the Roots rotor 3 and for the placement of the lever meter. The position of the measuring plate 54 can be moved relative to the Roots rotor. After moving to a suitable position, the measuring plate 54 is fixedly connected with a T-block 52 and a positioning key 53.

[0042] The relative positions of the gearbox device 1 and the tailstock device 4 are initially positioned and locked by the positioning key 53 on the base device 5, and then completely locked by the T-block 52 and the bolts to fix their positions. After the assembly is completed, it is necessary to ensure the coaxiality of the top of the gearbox device 1 and the corresponding top on the tailstock device 4, and to ensure the parallelism of the axes of the two Roots rotors 3 after clamping. After ensuring the coaxiality and parallelism, the T-block 52 and the bolts are used to connect and fix.

[0043] The steps of the Roots rotor engagement detection method in this embodiment are as follows:

[0044] Take two Roots rotors 3 to be tested, place one Roots rotor 3 in a horizontal state, place a lever gauge on a measuring plate 54 to measure the profile surface of the horizontal Roots rotor 3, so that the measuring points are at the same height to ensure that the Roots rotor 3 is placed horizontally, and then one end of the horizontal Roots rotor 3 is fixed to a hydraulic tension sleeve 21 by a set screw 22, and the other end of the horizontal Roots rotor 3 is pressed against a tailstock top 411 of a tailstock device 4, and the horizontal Roots rotor 3 is clamped by a gear box device 1 and a tailstock top 411 of the tailstock device 4, and then the profile surface of the horizontal Roots rotor 3 is measured by a lever gauge;

[0045] After the profile surface of the horizontal Roots rotor 3 is measured, another Roots rotor 3 is placed vertically on the measuring plate 54, and a lever gauge is placed on the edge of the measuring plate 54 to measure the profile surface of the vertical Roots rotor 3, so that the measuring points are located on the same vertical plane to ensure the vertical placement of the Roots rotor 3. Then, the vertical Roots rotor 3 is clamped by another hydraulic tensioning sleeve 21 and another tailstock top 411 of the tailstock device 4, and the profile surface of the vertical Roots rotor 3 is measured by a lever gauge.

[0046] After the profile surface of the vertical Roots rotor 3 is measured, the two Roots rotors 3 are meshed because the two ends of the Roots rotor 3 are respectively connected to another hydraulic tension sleeve 21 and another tailstock top 411 of the tailstock device 4; when the Roots rotor 3 is completely clamped and tightened, the gear box handwheel 15 of the gear box device 1 is turned to drive the two Roots rotors 3 to rotate synchronously, and the gap is measured with a feeler gauge, so that the meshing gaps at multiple positions between the two meshing Roots rotors 3 can be measured to judge whether the two Roots rotors 3 meet the assembly requirements.

[0047] The placement of the Roots rotors 3 requires one to be placed vertically and the other to be placed horizontally, and requires calibration by using a lever meter. When placing, the horizontally placed Roots rotor 3 must be calibrated and locked before the vertical Roots rotor 3 can be placed and calibrated and locked. That is, when installing two Roots rotors 3, the Roots rotor 3 on one side is installed first. After the Roots rotor 3 on one side is placed stably and clamped, the Roots rotor 3 on the other side is installed for meter measurement. Two Roots rotors 3 cannot be placed at the same time.

[0048] In addition, it should be noted that the shapes and names of the parts and components of the specific embodiments described in this specification may be different, and the above content described in this specification is only an example of the structure of the utility model. All equivalent changes or simple changes made based on the structure, features and principles described in the patent concept of the utility model are included in the protection scope of the utility model patent. Technicians in the technical field of the utility model can make various modifications or supplements to the specific embodiments described or replace them in a similar manner, as long as they do not deviate from the structure of the utility model or exceed the scope defined by the claims, they should all fall within the protection scope of the utility model.

Claims

1. A Roots rotor meshing device, characterized in that: The invention comprises a gearbox device (1), a tensioning device (2), a tail frame device (4) and a base frame device (5). The gearbox device (1) comprises a gearbox housing (11), a gearbox cover plate (12), an active clamping mechanism (13), a driven clamping mechanism (14) and a gearbox handwheel (15). The active clamping mechanism (13) comprises an active clamping shaft (131), a No. 1 bearing (132), an active gear (134), a No. 2 bearing (135), an active bearing cover plate (136) and an active centering pin (137). The active clamping shaft (131) is rotatably mounted on the gearbox housing (11) via the No. 1 bearing (132) and the No. 2 bearing (135). The active bearing cover plate (136) is fixed on the gearbox housing (11) and cooperates with the No. 2 bearing (135). The active centering pin (137) is fixed on one end of the active clamping shaft (131). The gearbox handwheel (15) is fixed on the active bearing cover plate (136). The other end of the active clamping shaft (131), the active gear (134) is fixed on the active clamping shaft (131); the driven clamping mechanism (14) comprises a driven clamping shaft (141), a third bearing (142), a driven gear (144), a fourth bearing (145), a driven bearing cover plate (146) and a driven top (147); the driven clamping shaft (141) is rotatably mounted via the third bearing (142) and the fourth bearing (145). On the gear box housing (11), the driven bearing cover plate (146) is fixed on the gear box housing (11) and cooperates with the fourth bearing (145), the driven top (147) is fixed on one end of the driven clamping shaft (141), the driven gear (144) is fixed on the driven clamping shaft (141), and the driven gear (144) is meshed with the driving gear (134); the gear box cover plate (12) is fixed on the gear box housing (11); The tensioning device (2) comprises two hydraulic tensioning sleeves (21) with set screws (22), one hydraulic tensioning sleeve (21) being fixed on the active top (137) of the gearbox device (1), and the other hydraulic tensioning sleeve (21) being fixed on the driven top (147) of the gearbox device (1); The tailstock device (4) comprises a tailstock housing (42) and two center point clamping mechanisms (41), each center point clamping mechanism (41) comprising a tailstock handwheel (43), a tailstock center point (411), a center point sleeve (412), a center point seat (413), a tailstock set screw (414), a tailstock bearing (415), a tailstock cover plate (416), and a tailstock handwheel shaft (417), the center point seat (413) being fixed on the tailstock housing (42), the tailstock handwheel shaft (417) being rotatably mounted on the center point seat (413) via the tailstock bearing (415), the tailstock cover plate (416) being fixed on the center point seat (413) and cooperating with the tailstock bearing (415), the tailstock handwheel (43) being fixed on the tailstock handwheel shaft (417), and the tailstock cover plate (416) being fixed on the center point seat (413) and cooperating with the tailstock bearing (415). One end of the wheel shaft (417), the other end of the tailstock handwheel shaft (417) is provided with a screw structure with external threads, one end of the top sleeve (412) is provided with a threaded hole with internal threads, the side wall of the top sleeve (412) is provided with a guide groove (418), the tailstock top (411) is fixed to the other end of the top sleeve (412), the top sleeve (412) is slidably mounted on the top seat (413), the top sleeve (412) is threadedly connected to the screw structure on the tailstock handwheel shaft (417) through the threaded hole at one end, the tailstock set screw (414) is fixed in the top seat (413), and the protrusion of the tailstock set screw (414) is located in the guide groove (418) of the top sleeve (412); The base frame device (5) comprises a base plate (51) and a measuring plate (54), wherein the measuring plate (54) is mounted on the base plate (51), and the gear box device (1) and the tail frame device (4) are both mounted on the base plate (51), wherein the gear box device (1) and the tail frame device (4) are respectively located on two sides of the measuring plate (54), wherein the active top (137) is aligned with one tail frame top (411), and wherein the driven top (147) is aligned with another tail frame top (411).

2. The Roots rotor meshing device according to claim 1, characterized in that: The base frame device (5) further comprises a plurality of T-shaped blocks (52) and a plurality of positioning keys (53); at least two grooves are formed on the base plate (51); the T-shaped blocks (52) and the positioning keys (53) are both located in the grooves of the base plate (51); the gear box device (1) is mounted on the base plate (51) via the T-shaped blocks (52) and the positioning keys (53); and the tail frame device (4) is mounted on the base plate (51) via the T-shaped blocks (52) and the positioning keys (53).

3. The Roots rotor meshing device according to claim 2, characterized in that: The measuring plate (54) is mounted on the base plate (51) via a T-block (52) and a positioning key (53).

4. The Roots rotor meshing device according to claim 1, characterized in that: The active clamping mechanism (13) further comprises an active round nut (133), and the active gear (134) is fixed on the active clamping shaft (131) via the active round nut (133).

5. The Roots rotor meshing device according to claim 1, characterized in that: The driven clamping mechanism (14) further comprises a driven circular nut (143), and the driven gear (144) is fixed on the driven clamping shaft (141) via the driven circular nut (143).

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