Screw blower rotor blade surface gap adjusting device

Abstract

The utility model provides a screw blower rotor blade surface clearance adjusting device which comprises a male rotor locking assembly and a female rotor locking assembly, the male rotor locking assembly comprises a first locking disc and a second locking disc, and the female rotor locking assembly comprises a third locking disc and a fourth locking disc. Arc grooves are formed in the inner side face of the first locking disc and the inner side face of the second locking disc respectively, male rotor locking holes are formed in the two arc grooves, arc grooves are formed in the inner side face of the third locking disc and the inner side face of the fourth locking disc respectively, and female rotor locking holes are formed in the two arc grooves. The screw air blower solves the problems that when an existing screw air blower uses a feeler gauge to measure the blade surface gap of a female rotor and a male rotor, the measured value is prone to being inaccurate, the female rotor and the male rotor need to be knocked repeatedly during measurement, the working efficiency is reduced, and the surfaces of the female rotor and the male rotor can be damaged to different degrees due to knocking. The device can be widely applied to the adjustment of the blade surface clearance between the female rotor and the male rotor of the screw blower.

Description

Technical Field

[0001] The utility model relates to a screw blower, in particular to a rotor blade clearance adjusting device for a screw blower. Background Art

[0002] A screw blower is a gas delivery device based on the screw compression principle. It can compress the gas and deliver it to the required location by rotating the screw. A positive rotor and a negative rotor are installed inside the screw blower. The positive rotor and the negative rotor rotate synchronously to realize the suction, compression and exhaust steps of the screw blower, and finally convert the mechanical energy of the screw rotor into the pressure and kinetic energy of the gas.

[0003] In order to ensure that the blower can operate stably for a long time, there needs to be a suitable rotational gap between the blades of the male rotor and the female rotor. If the gap is too small, the blades of the male and female rotors will collide with each other. If the gap is too large, the air compression of the blower will be reduced. Therefore, there are strict standards for the size of the gap between the male and female rotor blades.

[0004] The existing method for adjusting the rotor blade clearance of a screw blower is to calculate the required clearance size between the blades of the yin and yang rotors through the operating pressure, rotation speed and other parameters of the blower, and then fix one of the drive gears on the yin and yang rotors, rotate the other drive gear, and measure the clearance size between the blades of the yin and yang rotors by inserting a feeler gauge into the blades of the yin and yang rotors. When the clearance size is not appropriate, it is necessary to knock the yin and yang rotors and change the relative positions of the yin and yang rotors until the required clearance size is obtained. However, in actual operation, since the clearance between the blades of the yin and yang rotors is very small, it is difficult to insert the feeler gauge, especially when using an impeller with a coating. Due to the uneven coating thickness on the blade surface, it is difficult to measure the accurate gap size using a feeler gauge. In addition, when the operator knocks on the yin and yang rotors, it is difficult to control the knocking force, and over-adjustment often occurs. At this time, the yin and yang rotors need to be knocked repeatedly. This gap adjustment method is highly dependent on the operator's installation experience. In addition, when using a feeler gauge for measurement, it is easily affected by the side clearance of the drive gear, resulting in inaccurate measurement values, reducing work efficiency, wasting working time, and delaying the overall assembly progress of the blower. In addition, the surfaces of the yin and yang rotors will be damaged to varying degrees due to the knocking, reducing the service life of the yin and yang rotors. Utility Model Content

[0005] In view of the above technical problems, the utility model provides a screw blower rotor blade gap adjustment device, which can fine-tune the gap between the yin and yang rotor blades, can quickly and accurately adjust the required gap size, and is particularly suitable for gap adjustment of blades with coated impellers. It can avoid inaccurate gap adjustment due to uneven thickness of coating on the impeller surface, improve work efficiency, save working time, speed up the overall assembly progress of the blower, and will not cause damage to the yin and yang rotors, thereby increasing the service life of the yin and yang rotors.

[0006] To this end, the technical solution of the utility model is a screw blower rotor blade clearance adjustment device, including a male rotor locking assembly and a female rotor locking assembly;

[0007] The male rotor locking assembly includes a first locking plate and a second locking plate, a side position of the first locking plate is provided with a locking plate fixing hole that penetrates through, the second locking plate includes a second locking plate locking section and a second locking plate adjusting section, the second locking plate adjusting section is located at the bottom end position of the second locking plate locking section and extends to the outer side of the bottommost end of the second locking plate locking section, the second locking plate adjusting section and the second locking plate locking section are arranged in a relatively vertical direction, a threaded slot hole is provided at the inner side position of the second locking plate locking section, the first locking plate is threadedly fixedly connected with the second locking plate by a locking screw passing through the locking plate fixing hole on the first locking plate and the threaded slot hole on the second locking plate locking section, the first locking plate and the second locking plate are fixedly connected, an arc groove is provided at the inner side position of the first locking plate, an arc groove is provided at the inner side position of the locking section of the second locking plate, and the male rotor locking hole is formed inside the two arc grooves;

[0008] The female rotor locking assembly includes a third locking plate and a fourth locking plate, the side position of the third locking plate is provided with a locking plate fixing hole that penetrates through, the fourth locking plate includes a fourth locking plate locking section and a fourth locking plate adjusting section, the fourth locking plate adjusting section is located at the bottom end position of the fourth locking plate locking section and extends to the outer side of the bottommost end of the fourth locking plate locking section, the fourth locking plate adjusting section and the fourth locking plate locking section are arranged in a relatively vertical direction, a threaded slot hole is provided at the inner side position of the fourth locking plate locking section, the third locking plate is threadedly fixedly connected through a locking screw passing through the locking plate fixing hole on the third locking plate and the threaded slot hole on the fourth locking plate locking section, so that the third locking plate and the fourth locking plate are fixedly connected, an arc groove is provided at the inner side surface position of the third locking plate, and an arc groove is provided at the inner side surface position of the locking section of the fourth locking plate, and the inner side of the two arc grooves forms the female rotor locking hole;

[0009] A male rotor locking assembly fixing hole is provided at the end surface of the first locking disk, a threaded through hole is provided at the bottom end of the second locking disk adjustment section near the inner side, a hand screw is connected to the inner thread of the threaded through hole, a fixing slot is provided at the bottom end of the second locking disk adjustment section near the outer side, and a gap measuring instrument is installed in the fixing slot;

[0010] A penetrating female rotor locking assembly fixing hole is provided at the end surface of the third locking disk, a penetrating threaded through hole is provided near the inner side of the bottom end of the fourth locking disk adjustment section, the internal thread of the threaded through hole is connected with a hand screw, and a fixing slot hole is provided near the outer side of the bottom end of the fourth locking disk adjustment section, and a gap measuring instrument is installed in the fixing slot hole.

[0011] Preferably, the inner end surface of the first locking disk is provided with a positioning boss, and the inner end surface of the locking section of the second locking disk is provided with a positioning groove corresponding to the positioning boss;

[0012] The inner end surface of the third locking disk is provided with a positioning boss, and the inner end surface of the locking section of the fourth locking disk is provided with a positioning groove corresponding to the positioning boss.

[0013] Preferably, the number of the positioning bosses on the first locking disk and the third locking disk is two respectively, and they are located at two sides of the arc groove respectively;

[0014] The number of the positioning grooves on the second locking disc locking section and the fourth locking disc locking section are two respectively, and they are located at two sides of the arc groove respectively.

[0015] Preferably, the thickness of the male rotor locking assembly and the female rotor locking assembly is 30 mm ± 5 mm;

[0016] The width dimensions of the second locking plate adjustment section and the fourth locking plate adjustment section are 30 mm±5 mm.

[0017] Preferably, chamfers are provided between the arc grooves on the first locking plate and the second locking plate and the two connected end surfaces, and chamfers are provided between the arc grooves on the third locking plate and the fourth locking plate and the two connected end surfaces.

[0018] Preferably, the number of the locking disk fixing holes on the first locking disk and the third locking disk is two respectively, and they are located at two sides of the arc groove respectively;

[0019] The number of threaded slot holes on the second locking disc locking section and the fourth locking disc locking section is two respectively, and they are located at two sides of the circular arc groove respectively.

[0020] The beneficial effects of the utility model are:

[0021] When the rotor blade clearance adjustment device is in use, the positive rotor locking assembly and the negative rotor locking assembly are respectively locked to the positive rotor rotating shaft and the negative rotor rotating shaft, and then the hand screw is rotated to push the second locking disk or the fourth locking disk to fine-tune the relative position of the positive rotor or the negative rotor. While rotating the hand screw, the scale value of the clearance measuring instrument is observed. When the clearance measuring instrument reaches the specified scale, the hand screw can be stopped from being rotated to fix and lock the positive and negative rotors. The whole operation process is simple and fast, and the required clearance size can be adjusted quickly and accurately, thereby improving work efficiency, saving work time, and accelerating the progress of the overall assembly of the blower. In addition, since the two ends of the arc groove on the first locking disk, the second locking disk, the third locking disk and the fourth locking disk are respectively provided with chamfers, when the positive and negative rotor rotating shafts are locked, the inner surface of the locking disk can be prevented from causing bumps and scratches on the positive and negative rotor rotating shafts, thereby improving the service life of the positive and negative rotors. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional diagram of the utility model;

[0023] Figure 2 It is another stereogram of the utility model;

[0024] Figure 3 It is the front view of the utility model;

[0025] Figure 4 It is a three-dimensional diagram of the structure of the first locking disk and the third locking disk of the utility model;

[0026] Figure 5 This is a front view of the structure of the first locking disc and the third locking disc of the utility model;

[0027] Figure 6 It is a three-dimensional diagram of the structure of the second locking disk and the fourth locking disk of the utility model;

[0028] Figure 7 This is a schematic diagram of the installation of the first locking disc and the second locking disc of the utility model;

[0029] Figure 8 This utility model Figure 1 Enlarged view of point A in the middle.

[0030] Explanation of symbols in the figure:

[0031] 1. Male rotor locking assembly; 101. First locking plate; 10101. Male rotor locking assembly fixing hole; 10102. Locking plate fixing hole; 102. Second locking plate; 10201. Second locking plate locking section; 10202. Second locking plate adjustment section; 2. Female rotor locking assembly; 201. Third locking plate; 20101. Female rotor locking assembly fixing hole; 20102. Locking plate fixing hole; 202. Fourth locking plate; 20201. Fourth locking plate locking section; 20202. Fourth locking plate adjustment section; 3. Thumb screw; 4. Fixing slot hole; 5. Threaded through hole; 6. Circular arc groove; 7. Male rotor locking hole; 8. Positioning boss; 9. Threaded slot hole; 10. Positioning groove; 11. Female rotor locking hole; 12. Locking screw; 13. Chamfer. DETAILED DESCRIPTION

[0032] The utility model is further described below in conjunction with embodiments.

[0033] pass Figure 1-Figure 8 It can be seen that the screw blower rotor blade clearance adjustment device includes a male rotor locking assembly 1 and a female rotor locking assembly 2.

[0034] The male rotor locking assembly 1 includes a first locking disk 101 and a second locking disk 102. The side position of the first locking disk 101 is provided with a locking disk fixing hole 10102 that penetrates therethrough. The second locking disk 102 includes a second locking disk locking section 10201 and a second locking disk adjustment section 10202. The second locking disk adjustment section 10202 is located at the bottom end position of the second locking disk locking section 10201 and extends to the outer side of the bottom end of the second locking disk locking section 10201. The second locking disk adjustment section 10202 and the second locking disk locking section 10201 are arranged in a vertical direction relative to each other. The inner side position of the second locking disk locking section 10201 is provided with Threaded slot hole 9, the first locking plate 101 is threadedly fixedly connected with the threaded slot hole 9 on the locking plate locking section 10201 through the locking screw 12 passing through the locking plate fixing hole 10102 on the first locking plate 101, and the first locking plate 101 and the second locking plate 102 are fixedly connected, an arc groove 6 is provided on the inner side surface of the first locking plate 101, and an arc groove 6 is provided on the inner side surface of the locking section 10201 of the second locking plate, and a male rotor locking hole 7 is formed inside the two arc grooves 6 for locking the male rotor rotating shaft. When the two arc grooves 6 are fully fitted, the inner diameter of the male rotor locking hole 7 is smaller than the outer diameter of the male rotor rotating shaft.

[0035] The female rotor locking assembly 2 includes a third locking disk 201 and a fourth locking disk 202. The side position of the third locking disk 201 is provided with a penetrating locking disk fixing hole 20102. The fourth locking disk 202 includes a fourth locking disk locking section 20201 and a fourth locking disk adjustment section 20202. The fourth locking disk adjustment section 20202 is located at the bottom end position of the fourth locking disk locking section 20201 and extends to the outer side of the bottom end of the fourth locking disk locking section 20201. The fourth locking disk adjustment section 20202 and the fourth locking disk locking section 20201 are arranged in a relatively vertical direction. The inner side position of the fourth locking disk locking section 20201 is provided with a screw. The third locking disk 201 is threadedly fixedly connected with the fourth locking disk 202 by the locking screw 12 passing through the locking disk fixing hole 20102 on the third locking disk 201 and the threaded groove hole 9 on the fourth locking disk locking segment 20201, and the third locking disk 201 and the fourth locking disk 202 are fixedly connected, and an arc groove 6 is provided on the inner side surface of the third locking disk 201, and an arc groove 6 is provided on the inner side surface of the fourth locking disk locking segment 20201, and a female rotor locking hole 11 is formed inside the two arc grooves 6 for locking the female rotor rotating shaft. When the two arc grooves 6 are fully fitted, the inner diameter of the female rotor locking hole 11 is smaller than the outer diameter of the female rotor rotating shaft.

[0036] A penetrating male rotor locking assembly fixing hole 10101 is provided at the end surface of the first locking plate 101, and is fixedly connected to the blower housing on one side of the male rotor by a locking screw passing through the male rotor locking assembly fixing hole 10101; a penetrating threaded through hole 5 is provided at the bottom end near the inner side of the second locking plate adjustment section 10202, and a hand screw 3 is connected to the internal thread of the threaded through hole 5; a fixing slot hole 4 is provided at the bottom end near the outer side of the second locking plate adjustment section 10202, and a gap measuring instrument is installed in the fixing slot hole 4.

[0037] A penetrating female rotor locking assembly fixing hole 20101 is provided at the end surface of the third locking disk 201, a penetrating threaded through hole 5 is provided near the inner side of the bottom end of the fourth locking disk adjustment section 20202, the internal thread of the threaded through hole 5 is connected with a hand screw 3, and a fixing slot hole 4 is provided near the outer side of the bottom end of the fourth locking disk adjustment section 20202, a gap measuring instrument is installed in the fixing slot hole 4, and the gap measuring instrument can check the gap value in real time when adjusting the gap, which is convenient and quick, and realizes fast and accurate fine-tuning operation.

[0038] In view of the structural characteristics of the locking disk, another implementation scheme is that the inner end face of the first locking disk 101 is provided with a positioning boss 8, the inner end face of the second locking disk locking section 10201 is provided with a positioning groove 10 corresponding to the positioning boss 8, the inner end face of the third locking disk 201 is provided with a positioning boss 8, and the inner end face of the fourth locking disk locking section 20201 is provided with a positioning groove 10 corresponding to the positioning boss 8. Through the mutual positioning and cooperation between the positioning boss 8 and the positioning groove 10, the installation position can be quickly and accurately found when the corresponding locking disks are docked and installed, and the positioning boss is inserted into the positioning groove 10 to achieve preliminary fixation between the corresponding two locking disks, and then the corresponding two locking disks are threadedly locked by the locking screw 12, which can prevent the two locking disks from being accidentally detached due to external force or vibration after the docking installation is completed and before the locking screw 12 is tightened.

[0039] With regard to the structural features of the positioning boss 8 and the positioning groove 10, another implementation scheme is that the number of positioning bosses 8 on the first locking plate 101 and the third locking plate 201 are two respectively, and are located on both sides of the arc groove 6 respectively; the number of positioning grooves 10 on the second locking plate locking segment 10201 and the fourth locking plate locking segment 20201 are two respectively, and are located on both sides of the arc groove 6 respectively. This allows for more rapid and accurate identification of the installation position when the corresponding locking plates are docked and installed, and can increase the firmness of the initial fixation between the corresponding two locking plates, providing higher stability for the subsequent rapid and accurate installation of the locking screws 12.

[0040] The thickness dimensions of the male rotor locking assembly 1 and the female rotor locking assembly 2 are both 30mm±5mm, and the width dimensions of the second locking plate adjustment section 10202 and the fourth locking plate adjustment section 20202 are 30mm±5mm, which can increase the bending strength of the locking plate, avoid deformation of the locking plate to varying degrees during use, improve the adjustment accuracy of the gap adjustment device, and extend the service life of the gap adjustment device.

[0041] The arc grooves 6 on the first locking plate 101 and the second locking plate 102 are respectively provided with chamfers 13 between the connected end surfaces on both sides; the arc grooves 6 on the third locking plate 201 and the fourth locking plate 202 are respectively provided with chamfers 13 between the connected end surfaces on both sides. When the rotating shafts of the yin and yang rotors are locked, the inner surfaces of the locking plates can be prevented from causing different degrees of damage to the rotating shafts of the yin and yang rotors such as bumps and scratches, thereby improving the service life of the yin and yang rotors.

[0042] There are two locking plate fixing holes 10102 and two locking plate fixing holes 20102 on the first locking plate 101 and the third locking plate 201, respectively, and they are located on both sides of the circular arc groove 6. There are two threaded groove holes 9 on the second locking plate locking segment 10201 and the fourth locking plate locking segment 20201, respectively, and they are located on both sides of the circular arc groove 6. This can improve the firmness of the circumferential locking of the yin and yang rotors and prevent looseness between the locking plate and the rotor rotating shaft during the gap adjustment process.

[0043] When the screw blower rotor blade clearance adjustment device is in use, the first locking plate 101 and the second locking plate 102 are symmetrically locked on the male rotor rotating shaft by the locking screw 12. At the same time, the male rotor locking assembly 1 and the blower casing on one side of the male rotor rotating shaft are fixedly connected by the locking screw 12 passing through the male rotor locking assembly fixing hole 10101 on the first locking plate 101. At this time, the male rotor locking assembly 1, the male rotor rotating shaft and the blower casing are fixedly locked to each other. A dial indicator is installed in the fixing slot 4 of the fourth locking plate adjustment section 20202. Then, the female rotor locking assembly 2 is rotated 180° relative to the male rotor locking assembly 1 and installed on the female rotor rotating shaft. The female rotor locking assembly 2 and the female rotor rotating shaft are circumferentially locked. At this time, the first The hand screw 3 on the second locking plate adjustment section 10202 is located at the top position of the fourth locking plate locking section 20201. Rotate the hand screw 3 inward, and push the top position of the fourth locking plate locking section 20201 by the hand screw 3 to push the female rotor relative to the male rotor. While rotating the hand screw 3, observe the gap value displayed on the dial indicator. When the dial indicator reaches the specified gap value, stop rotating the hand screw 3. Finally, fix the female rotor and the housing firmly. If the male rotor needs to be adjusted, use the above method in the same way. By rotating the hand screw 3 on the fourth locking plate adjustment section 20202, push the top position of the second locking plate locking section 10201 to push the male rotor relative to the female rotor to adjust the gap between the male and female rotor blades.

[0044] However, what is described above is only a specific embodiment of the present invention and should not be used to limit the scope of implementation of the present invention. Therefore, the replacement of equivalent components, or equivalent changes and modifications made according to the scope of protection of the patent of the present invention should still fall within the scope covered by the claims of the present invention.

Claims

1. A screw blower rotor blade clearance adjustment device, Its characteristics are: It includes a male rotor locking assembly and a female rotor locking assembly; The male rotor locking assembly includes a first locking plate and a second locking plate, wherein a locking plate fixing hole is provided at a side position of the first locking plate, and the second locking plate includes a second locking plate locking section and a second locking plate adjusting section, the second locking plate adjusting section is located at a bottom end position of the second locking plate locking section and extends to the outer side of the bottommost end of the second locking plate locking section, and the second locking plate adjusting section and the second locking plate locking section are arranged in a relatively vertical direction, and a threaded slot hole is provided at an inner side position of the second locking plate locking section, and the first locking plate is threadedly fixedly connected with the second locking plate by a locking screw passing through the locking plate fixing hole on the first locking plate and the threaded slot hole on the locking section of the second locking plate, so that the first locking plate and the second locking plate are fixedly connected, an arc groove is provided at the inner side position of the first locking plate, and an arc groove is provided at the inner side position of the locking section of the second locking plate, and the inner side of the two arc grooves form a male rotor locking hole; The locking plate has a plurality of locking members, each of which has a plurality of locking members, each of which has a plurality of locking members, each of which has a plurality of locking members, each of which has a plurality of locking members. The locking plate has a plurality of locking members, each of which has a plurality of locking members, each of which has a plurality of locking members. The locking plate has a plurality of locking members, each of which has a plurality of locking members. A male rotor locking assembly fixing hole is provided at the end surface of the first locking disk, a threaded through hole is provided at the bottom end of the second locking disk adjustment section near the inner side, a hand screw is connected to the inner thread of the threaded through hole, a fixing slot is provided at the bottom end of the second locking disk adjustment section near the outer side, and a gap measuring instrument is installed in the fixing slot; A penetrating female rotor locking assembly fixing hole is provided at the end surface of the third locking disk, a penetrating threaded through hole is provided near the inner side of the bottom end of the fourth locking disk adjustment section, the internal thread of the threaded through hole is connected with a hand screw, and a fixing slot hole is provided near the outer side of the bottom end of the fourth locking disk adjustment section, and a gap measuring instrument is installed in the fixing slot hole.

2. The screw blower rotor blade clearance adjustment device according to claim 1, Features: The inner end surface of the first locking disk is provided with a positioning boss, and the inner end surface of the locking section of the second locking disk is provided with a positioning groove corresponding to the positioning boss; The inner end surface of the third locking disk is provided with a positioning boss, and the inner end surface of the locking section of the fourth locking disk is provided with a positioning groove corresponding to the positioning boss.

3. The screw blower rotor blade clearance adjustment device according to claim 2, Features: The number of the positioning bosses on the first locking disk and the third locking disk is two respectively, and they are located at two sides of the arc groove respectively; The number of the positioning grooves on the second locking disc locking section and the fourth locking disc locking section is two respectively, and they are located at two sides of the arc groove respectively.

4. The screw blower rotor blade clearance adjustment device according to claim 1, Features: The thickness of the male rotor locking assembly and the female rotor locking assembly are both 30 mm ± 5 mm; The width of the second locking plate adjustment section and the fourth locking plate adjustment section is 30 mm±5 mm.

5. The screw blower rotor blade clearance adjustment device according to claim 1, Features: The arc grooves on the first locking plate and the second locking plate are respectively provided with chamfers between the two connected end surfaces, and the arc grooves on the third locking plate and the fourth locking plate are respectively provided with chamfers between the two connected end surfaces.

6. The screw blower rotor blade clearance adjustment device according to claim 1, Features: The number of the locking plate fixing holes on the first locking plate and the third locking plate are two respectively, and they are located at two sides of the arc groove respectively; The number of threaded slot holes on the second locking disc locking segment and the fourth locking disc locking segment is two respectively, and they are located at two sides of the circular arc groove respectively.

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