Structure for improving connection rigidity of synchronous gear of roots pump

Abstract

The utility model relates to the technical field of roots pumps, and provides a structure for improving connection rigidity of synchronous gears of a roots pump, which comprises a driving shaft, a driven shaft and rotors respectively fixed on the two shafts, and a driving gear and a driven gear which synchronously rotate are respectively sleeved on the driving shaft and the driven shaft. A positioning lantern ring and a driven lantern ring are arranged on one side of the driven gear on the driven shaft in a sleeving manner; wherein the positioning lantern ring is fixed with the driven shaft through a bolt, and a positioning block is fixed above the positioning lantern ring; the driven lantern ring is fixed to the driven gear, and a positioning groove is formed in the upper portion of the driven lantern ring. And the positioning blocks can be inserted into the positioning grooves to be fixed. The positioning lantern ring is fixed to the driven shaft, the driven lantern ring is fixed to the driven gear, rigid connection between the driven gear and the driven shaft is achieved, the fixing mode is that the positioning blocks on the positioning lantern ring are connected with the positioning grooves in the driven lantern ring in an inserted mode, and the connection rigidity of the driven gear is guaranteed; and meanwhile, the normal operation and the service life of the gear can be ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of Roots pumps, in particular to a structure for improving the connection rigidity of synchronous gears of Roots pumps. Background Art

[0002] During operation, two synchronous gears drive two rotors, which rotate synchronously in opposite directions within the pump body. The surfaces of the two rotors do not touch, but a certain gap must be maintained. During maintenance of the Roots pump, the positions of the rotors and gears inevitably shift. Upon reinstallation, the gears must be readjusted to adjust the rotor gap. Therefore, the gears of the Roots pump must be installed using a structure that can be adjusted later, while also ensuring a rigid connection. Otherwise, the gears will not be able to withstand the operating intensity of the Roots pump, causing damage to the machine and other components.

[0003] To address the above issues, China patented a device for improving the connection rigidity of the synchronous gear of a Roots pump, application number 202222726322.7, authorization publication number CN 218787176 U. The patent discloses a connection device that fixes a flange on the driven shaft and perforates the driven gear. The driven gear and the flange are fixed by bolts and pins, and the driven gear and the flange are fixed and separated by tightening and loosening the bolts, thereby achieving adjustment of the driven gear.

[0004] However, in this device, it is necessary to drill holes in the driven gear. Due to the structure and working characteristics of the gear, drilling holes in the gear will seriously affect the dynamic balance of the gear operation, thereby generating high-speed vibration. It will also aggravate the wear of components such as bearings, increase the frequency of maintenance and replacement of parts, thereby reducing work efficiency and increasing operating costs. Utility Model Content

[0005] The utility model proposes a structure for improving the connection rigidity of the synchronous gears of a Roots pump, which enables the position of the gears to be adjusted after maintenance while ensuring the connection rigidity of the gears to adapt to the working intensity of the Roots pump during operation without causing more wear on parts.

[0006] To this end, the present application provides a structure for improving the connection rigidity of the synchronous gears of a Roots pump, and the technical solution adopted is as follows:

[0007] It includes a driving shaft and a driven shaft and rotors fixed on the two shafts respectively, and the driving shaft and the driven shaft are respectively provided with a driving gear and a driven gear that rotate synchronously, and the driven shaft is provided with a positioning collar and a driven collar on one side of the driven gear; wherein the positioning collar is fixed to the driven shaft by bolts, and a positioning block is fixed above it; the driven collar is fixed to the driven gear and a positioning groove is opened above it; the positioning block can be inserted into the positioning groove and fixed.

[0008] A further technical solution is that there are two positioning collars and two driven collars, which are relatively located on both sides of the driven gear.

[0009] A further technical solution is that the cross section of the positioning collar is a convex structure arranged toward the driven gear, comprising a locking ring and a reinforcement ring, the locking ring being arranged close to the driven gear and the positioning block being fixed on the inner surface of the locking ring.

[0010] A further technical solution is that threaded holes are provided on the positioning collar and the driven shaft, and the bolts pass through the threaded holes to fix the two.

[0011] A further technical solution is that the positioning blocks and positioning grooves are both provided with a plurality of ring-shaped positioning blocks and positioning grooves.

[0012] A further technical solution is that two limiting rings are respectively sleeved on the driving shaft and the driven shaft, and the limiting rings are fixed on both sides of the rotor respectively.

[0013] The working principle and beneficial effects of this application are:

[0014] The locating collar is fixed on the driven shaft, and the driven collar is fixed on the driven gear. Therefore, the locating collar and the driven collar are fixed to realize the rigid connection between the driven gear and the driven shaft. The fixing method is to insert the locating block on the locating collar into the locating groove on the driven collar, which ensures the connection rigidity of the driven gear and also ensures the normal operation and service life of the gear. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present application will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0016] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present application;

[0017] Figure 2 This is a schematic diagram of the overall axonometric structure of an embodiment of the present application;

[0018] Figure 3 This is a schematic structural diagram of the positioning collar and the driven collar described in this application;

[0019] Figure 4 This is a schematic cross-sectional structural diagram of the positioning collar and the driven collar described in this application. DETAILED DESCRIPTION

[0020] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] like Figure 1 As shown in Figure 4, a structure for improving the rigidity of the synchronous gear connection of a Roots pump comprises a driving shaft 1 and a driven shaft 2, and rotors 100 fixed to each shaft. The driving shaft 1 and driven shaft 2 are also sleeved with a driving gear 11 and a driven gear 21, respectively, that rotate synchronously. A positioning collar 22 and a driven collar 23 are sleeved on one side of the driven gear 21 on the driven shaft 2. The positioning collar 22 is secured to the driven shaft 2 by bolts 24, and a positioning block 221 is secured above it. Both the positioning collar 22 and the driven shaft 2 have threaded holes 240 through which the bolts 24 pass to secure them. The driven collar 23 is secured to the driven gear 21 and has a positioning groove 211 formed above it. The positioning block 221 can be inserted into the positioning groove 211 for securement.

[0022] When the Roots pump has been disassembled for inspection and maintenance, the gap between the rotors 100 changes. When it is necessary to rotate the driven gear 21 to adjust the gap between the rotors 100, first loosen the bolt 24 and remove it from the bolt 24 hole. At this time, the positioning collar 22 can move axially along the driven shaft 2, and then move the positioning collar 22 axially to make the positioning block 221 disengage from the positioning groove 211. At this time, the driven gear 21 and the driven shaft 2 are no longer fixedly connected and can rotate relative to each other. Then rotate the positions of the two to drive the gap between the two rotors 100 to change. After confirming that the gap adjustment is completed, move the positioning collar 22 in the opposite direction to reinsert the positioning block 221 into the positioning groove 211, and insert the bolt 24 into the threaded hole 240 to re-fix the positioning collar 22 to the driven shaft 2.

[0023] This structure fixes the positioning collar 22 on the driven shaft 2, and the driven collar 23 on the driven gear 21, thereby fixing the positioning collar 22 and the driven collar 23, realizing a rigid connection between the driven gear 21 and the driven shaft 2. The connection method is to plug the positioning block 221 on the positioning collar 22 into the positioning groove 211 on the driven collar 23, thereby ensuring the connection rigidity of the driven gear 21 and also ensuring the normal operation and service life of the gear.

[0024] Furthermore, the positioning blocks 221 and the positioning grooves 211 are each provided with a plurality of ring-shaped portions, thereby further increasing the connection strength between the two and ensuring the connection rigidity of the driven gear 21 .

[0025] like Figure 3 As shown, there are two positioning collars 22 and two driven collars 23, which are relatively located on both sides of the driven gear 21, so that the driven gear 21 is subjected to force on both sides, which not only enhances the connection rigidity of the driven gear 21 but also ensures the force balance of the gear.

[0026] like Figure 4 As shown, the cross-section of the positioning collar 22 is a convex structure arranged toward the driven gear 21, and includes a locking ring 222 and a reinforcement ring 223. The locking ring 222 is arranged close to the driven gear 21, and the positioning block 221 is fixed to the inner surface of the locking ring 222. Therefore, when the positioning block 221 and the positioning groove 211 are inserted, the locking ring 222 is pressed against the outside of the driven collar 23, and the connection force generated between the two is stronger. The reinforcement ring 223 can ensure a stronger connection between the positioning collar 22 and the driven shaft 2, and has a stronger pressure resistance, ensuring sufficient connection rigidity and resistance to damage during the strong operation of the Roots pump.

[0027] like Figure 1 and Figure 2 As shown, two limiting rings 101 are respectively mounted on the driving shaft 1 and the driven shaft 2, and the limiting rings 101 are fixed to either side of the rotor 100. The limiting rings 101 can limit the position of the rotor 100 to prevent axial displacement during high-speed operation. They can also assist the positioning pins when the Roots pump is disassembled for maintenance, playing a certain role in preventing the rotor 100 from rotating.

[0028] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A structure for improving the rigidity of the synchronous gear connection of a Roots pump, comprising a driving shaft (1) and a driven shaft (2) and rotors (100) fixed to the two shafts, wherein the driving shaft (1) and the driven shaft (2) are respectively provided with a driving gear (11) and a driven gear (21) that rotate synchronously, and wherein: A positioning collar (22) and a driven collar (23) are sleeved on one side of the driven gear (21) on the driven shaft (2); The positioning collar (22) is fixed to the driven shaft (2) via bolts (24), and a positioning block (221) is fixed above the positioning collar (22); the driven collar (23) is fixed to the driven gear (21) and a positioning groove (211) is provided above the driven collar (23); the positioning block (221) can be inserted into the positioning groove (211) and fixed.

2. A structure for improving the connection rigidity of the synchronous gear of a Roots pump according to claim 1, characterized in that: There are two positioning collars (22) and two driven collars (23), which are relatively located on both sides of the driven gear (21).

3. The structure for improving the connection rigidity of the synchronous gear of a Roots pump according to claim 1, characterized in that: The cross section of the positioning collar (22) is a convex structure arranged toward the driven gear (21), comprising a locking ring (222) and a reinforcement ring (223); the locking ring (222) is arranged close to the driven gear (21) and the positioning block (221) is fixed to the inner surface of the locking ring (222).

4. The structure for improving the connection rigidity of the synchronous gear of a Roots pump according to claim 1, characterized in that: The positioning collar (22) and the driven shaft (2) are both provided with threaded holes (240), and the bolts (24) pass through the threaded holes (240) to fix the two.

5. The structure for improving the connection rigidity of the synchronous gear of a Roots pump according to claim 1, characterized in that: The positioning blocks (221) and the positioning grooves (211) are each provided with a plurality of ring-shaped arrangements.

6. The structure for improving the connection rigidity of the synchronous gears of a Roots pump according to claim 1, characterized in that: Two limiting rings (101) are respectively sleeved on the driving shaft (1) and the driven shaft (2), and the limiting rings (101) are correspondingly fixed on both sides of the rotor (100).

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