Integrated screw mechanism

Abstract

The utility model discloses an integrated screw mechanism which is arranged on a shell of a compressor, the shell is provided with an air inlet, a compression chamber and an air outlet, and the screw mechanism is used for being matched with a star wheel sheet for transmission so as to compress fluid sucked into the compression chamber from the air inlet. The screw mechanism comprises a screw rotor and two sets of installation assemblies arranged at the two ends of the screw rotor, and the two sets of installation assemblies are in positioning connection with the two axial ends of the compression chamber of the shell correspondingly so that the screw rotor can be rotatably supported on the shell. According to the utility model, the V-shaped accommodating groove is formed in the sealing part of the screw rod structure so as to store particulate matters generated in the air compression process, so that the maintenance frequency of the screw rod rotor is reduced, and meanwhile, the damage of the particulate matters to the compressor is reduced; the screw rotor is rotatably supported on the compressor through the two groups of mounting assemblies, so that the screw rotor is integrally assembled and disassembled, the structure is simple, the use is convenient, and the maintenance cost of the compressor is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of single-screw air compressors, in particular to an integrated screw mechanism. Background Art

[0002] A screw air compressor (hereafter referred to as a compressor) is a device that compresses air into gas through the continuous motion of a rotor. During operation, air enters the compressor's compression chamber through an inlet valve. The rotation of the rotor then compresses the air, increasing its temperature and pressure. Finally, the compressed gas is pushed out of the screw compressor and transported through pipelines to other equipment for use.

[0003] When a compressor is operating, impurities such as dust, sand, and fibers in the air enter the compressor along with the air. Under the high-speed motion, high temperature, and high pressure of the screw compressor, some of these impurities, small and light, are discharged from the air outlet along with the high-pressure oil and gas, while other particles remain trapped between the seal of the screw rotor and the compression chamber. To prevent dust from being generated in screw compressors, filters are currently installed at the compressor's air inlet to filter out impurities in the air, and dust generation in screw compressors is reduced by regularly cleaning the filters. However, even after long periods of operation, particulate matter will still be generated in the compressor, and these particles will rub against the inner wall of the compression chamber due to the rotating rotor. If not cleaned promptly, this will damage the screw and the compression chamber, reducing the screw's service life. Furthermore, the existing process of disassembling the screw from the compressor is cumbersome, resulting in high maintenance costs for the compressor. Summary of the Invention

[0004] In order to overcome the above-mentioned defects, the present invention provides an integrated screw mechanism to solve the problem that the screw mechanism in the prior art is inconvenient to disassemble and the screw is damaged by particles not cleaned in time.

[0005] The technical solution adopted by the present invention to solve the technical problem is as follows: an integrated screw mechanism is provided, which is arranged on the housing of the compressor, wherein the housing is provided with an air inlet, a compression chamber and an air outlet, and the screw mechanism is used to cooperate with the star wheel to drive to compress the fluid sucked from the air inlet into the compression chamber. The screw mechanism includes:

[0006] A screw rotor comprising a main shaft arranged along the axial direction of the compression chamber, and a screw structure sleeved on the main shaft, the screw structure having a toothed portion and a sealing portion, the toothed portion being formed by a plurality of spiral grooves spirally arranged about its axial direction from one end of the air inlet to one end of the air outlet, the sealing portion being provided at the end of the spiral groove and connected to the inner wall of the compression chamber in a rolling sealing manner, the outer circumferential surface of the sealing portion being provided with a plurality of V-shaped accommodating grooves along its axial direction;

[0007] The mounting components are configured into two groups, and the two groups of mounting components are respectively positioned and connected to the two ends of the compression chamber of the shell in the axial direction to rotatably support the screw rotor on the shell.

[0008] As a further improvement of the present invention, the two groups of mounting assemblies are respectively defined as a first mounting assembly and a second mounting assembly, and the first mounting assembly and the second mounting assembly are arranged in radial symmetry;

[0009] Both ends of the compression chamber axially penetrate the shell to form a first mounting hole and a second mounting hole on the shell; the first mounting assembly and the second mounting assembly are respectively configured in the first mounting hole and the second mounting hole.

[0010] As a further improvement of the present invention, the first mounting assembly includes:

[0011] a first mounting seat comprising a first connecting portion adapted to the first mounting hole, and a first connecting flange integrally connected to the first connecting portion and fixedly connected to the housing;

[0012] a first bearing, disposed in the first connecting portion of the first mounting seat and sleeved on one end portion of the main shaft;

[0013] The second installation component includes:

[0014] a second mounting seat, comprising a second connecting portion adapted to the second mounting hole, and a second connecting flange integrally connected to the second connecting portion and fixedly connected to the housing;

[0015] The second bearing is arranged in the second connecting portion of the second mounting seat, and the other end of the main shaft passes through the second bearing and is connected to the power source.

[0016] As a further improvement of the present invention, the first connecting portion extends toward one end of the compression chamber into the compression chamber and close to the head end of the spiral groove, and the first connecting portion is provided with a first through hole along its axial direction for the main shaft to pass through;

[0017] One end of the second connecting portion toward the compression chamber extends into the compression chamber and close to the end of the sealing portion, and a second through hole for the main shaft to pass through is provided on the second connecting portion along its axial direction.

[0018] As a further improvement of the present invention, a first mounting cover is provided on the first mounting seat, and the first mounting cover is plugged into and matched with the first mounting seat to form a first placement groove for positioning the first bearing;

[0019] A second mounting cover is provided on the second mounting seat, and the second mounting cover is plugged into and matched with the second mounting seat to form a second placement groove for positioning the second bearing, and the second mounting cover is also provided with a third through-hole for the main shaft to pass through.

[0020] As a further improvement of the present invention, the end of the main shaft corresponding to the first bearing is provided with a docking portion adapted to the inner ring of the first bearing, and the upper end surface of the docking portion is covered with a pad for positioning the inner ring of the first bearing on the docking portion;

[0021] A sleeve is provided on the main shaft at a position corresponding to the second through-hole, one end of the sleeve extends into the second connecting portion, a positioning ring is provided on the main shaft near the second mounting groove, and the inner ring of the second bearing is positioned between the sleeve and the positioning ring.

[0022] As a further improvement of the present invention, a plurality of first lubrication grooves are arranged at intervals along the axial direction of the hole wall of the first through hole;

[0023] A plurality of second lubricating grooves arranged at intervals are formed on the wall of the second through hole along its axial direction.

[0024] As a further improvement of the present invention, the first lubrication groove and the second lubrication groove are both semicircular grooves.

[0025] As a further improvement of the present invention, the first bearing is a cylindrical roller bearing, and the second bearing is a double-row ball bearing.

[0026] The beneficial effects of the utility model are:

[0027] 1. By setting a V-shaped groove in the sealing part of the screw structure to collect particulate matter generated during the air compression process, the maintenance frequency of the screw rotor is reduced, and the damage to the compressor caused by particulate matter is reduced;

[0028] 2. The screw rotor is rotatably supported on the compressor through two sets of mounting components, so that the screw rotor can be assembled and disassembled. It has a simple structure, is easy to use, and reduces the maintenance cost of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the structure of the compressor of the utility model;

[0030] Figure 2 This is a schematic diagram of the casing structure of the compressor of the utility model;

[0031] Figure 3 This is a structural diagram of the screw mechanism of the utility model;

[0032] Figure 4This is a schematic axial cross-sectional view of the screw mechanism of the present invention;

[0033] Figure 5 This is a schematic diagram of the partially exploded structure of the screw mechanism of the present invention.

[0034] The following description is made with reference to the accompanying drawings:

[0035] 1. Housing; 101. Air inlet; 102. Compression chamber; 103. Air outlet; 104. First mounting hole; 105. Second mounting hole; 2. Screw mechanism; 20. Screw rotor; 201. Main shaft; 2011. Docking portion; 202. Screw structure; 2021. Toothed portion; 20211. Spiral groove; 2022. Sealing portion; 20221. V-shaped accommodating groove; 21. First mounting assembly; 211. First mounting seat; 2111. First connecting portion; 2112. First connecting flange; 2113. First through-hole; 21131, first lubrication groove; 212, first bearing; 213, first mounting cover; 214, first mounting groove; 215, gasket; 22, second mounting assembly; 221, second mounting seat; 2211, second connecting portion; 2212, second connecting flange; 2213, second through-hole; 22131, second lubrication groove; 222, second bearing; 223, second mounting cover; 2231, third through-hole; 224, second mounting groove; 225, bushing; 226, positioning ring; 3, star wheel. DETAILED DESCRIPTION

[0036] A preferred embodiment of the present invention is described in detail below with reference to the accompanying drawings.

[0037] See Figures 1 to 2 The integrated screw mechanism provided by the present invention is disposed within the compressor housing 1. The housing 1 is provided with an air inlet 101, a compression chamber 102, and an air outlet 103. The screw mechanism 2 is used to cooperate with the star wheel 3 to compress the fluid drawn from the air inlet 101 into the compression chamber 102. It should be noted that the fluid comprises air and lubricating oil. The screw compressor simultaneously draws in lubricating oil along with the air. The lubricating oil has the functions of lubrication, sealing, and cooling during the operation of the compressor. The principle of air compression by a screw air compressor belongs to the prior art and will not be elaborated on here.

[0038] See Figures 3 to 5 The integrated screw mechanism provided by the present invention includes a screw rotor 20 and two sets of mounting assemblies for rotatably supporting the screw rotor 20 on the housing 1. During compressor maintenance, only the connection between one set of mounting assemblies and the housing 1 needs to be removed to completely remove the screw rotor 20 from the housing 1, thus achieving complete assembly and disassembly of the screw rotor 20. This simple structure and easy operation facilitate compressor assembly and disassembly maintenance, saving maintenance costs.

[0039] The screw rotor 20 includes a main shaft 201 arranged axially along the compression chamber 102, and a screw structure 202 sleeved on the main shaft 201. The screw structure 202 has a toothed portion 2021 and a sealing portion 2022. The toothed portion 2021 is formed by a plurality of spiral grooves 20211 spirally arranged axially from the air inlet 101 to the air outlet 103. The sealing portion 2022 is located at the end of the spiral grooves 20211 and is connected to the inner wall of the compression chamber 102 in a rolling seal. The outer circumference of the sealing portion 2022 is provided with a plurality of V-shaped receiving grooves 20221 along its axial direction. The sealing portion 2022 has a clearance fit with the inner wall of the compression chamber 102, thereby ensuring the rotation of the screw rotor 20. When the screw rotor 20 rotates at high speed, lubricating oil sucked into the compression chamber forms an oil film in this gap, thereby achieving a seal between the screw structure 202 and the compression chamber 102. The particles transported to the gap along with the high-pressure oil and gas are retained in the V-shaped receiving groove 20221 as the screw rotor 20 rotates, thereby preventing the particles from remaining in the gap and affecting the sealing of the compression chamber and damaging the screw structure.

[0040] The mounting components are configured into two groups, and the two groups of mounting components are respectively positioned and connected to the two ends of the compression chamber 102 of the shell 1 in the axial direction to rotatably support the screw rotor 20 on the shell 1. Figure 1 For reference, the vertical top of the main shaft 201 is referred to as the upper head end, and the bottom is referred to as the lower terminal end. The two sets of mounting assemblies are defined as the first mounting assembly 21 and the second mounting assembly 22, respectively. The first mounting assembly 21 and the second mounting assembly 22 are radially symmetrically arranged at the upper and lower ends of the compression chamber 102. Accordingly, the axial ends of the compression chamber 102 extend through the housing 1, forming first mounting holes 104 and second mounting holes 105 at the upper and lower ends of the housing 1. The first mounting assembly 21 and the second mounting assembly 22 are respectively disposed in the first mounting holes 104 and the second mounting holes 105 and connected to the main shaft 201. Furthermore, to ensure stable rotation of the screw rotor 20 about its axis, the central axes of the first mounting hole 104, the first mounting assembly 21, the screw rotor 20, the second mounting hole 105, and the second mounting assembly 22 are collinear.

[0041] Furthermore, the first mounting assembly 21 includes a first mounting seat 211, a first bearing 212, and a first mounting cover 213. The first mounting seat 211 includes a first connecting portion 2111 adapted to fit within the first mounting hole 104, and a first connecting flange 2112 integrally connected to the first connecting portion 2111 and fixedly connected to the housing 1. The housing 1 can be provided with a mounting structure on the outer circumference near the first mounting hole 104 thereof, which interfaces with the first connecting flange 2112. The first connecting flange 2112 is secured to the mounting structure via a bolt assembly, thereby achieving a removable connection between the first mounting seat 211 and the housing 1. In addition, the lower end of the first connecting portion 2111 extends into the compression chamber 102 and is close to the upper end of the spiral groove 20211, and the first connecting portion 2111 is provided with a first through-hole 2113 for the main shaft 201 to pass through. The main shaft 201 and the first through-hole 2113 are loosely matched, and a plurality of spaced-apart semicircular first lubrication grooves 21131 are provided on the hole wall of the first through-hole 2113 along its axial ring to achieve a sliding seal between the main shaft 201 and the first mounting seat 211. The principle of the sliding seal is the same as the principle of the above-mentioned V-shaped accommodating groove 20221, which will not be repeated here.

[0042] Furthermore, a first bearing 212 is provided in the first connecting portion 2111 of the first mounting seat 211, and the upper end portion of the main shaft 201 is provided with a docking portion 2011 that is adapted to the inner ring of the first bearing 212. The upper end face cover of the docking portion 2011 is provided with a pad 215 that positions the inner ring of the first bearing 212 on the docking portion 2011. The pad 215 is detachably fixed to the main shaft 201 by a locking screw, thereby realizing a stable connection between the first bearing 212 and the main shaft 201. A first mounting cover 213 is provided on the first mounting seat 211, and the first mounting cover 213 is plugged into and matched with the first mounting seat 211 to form a first mounting groove 214 for positioning the first bearing 212; that is, the outer ring of the first bearing 212 is positioned in the first mounting groove 214. By arranging the first mounting seat 211, the first mounting cover 213 and the spacer 215 to cooperate with each other, the first bearing 212 is stably fixed to the upper end of the main shaft 201, ensuring that the main shaft 201 can rotate stably.

[0043] Continue reading Figure 4The second mounting assembly 22 includes a second mounting seat 221, a second bearing 222, a second mounting cover 223, a sleeve 225, and a positioning ring 226. The second mounting seat 221 includes a second connecting portion 2211 adapted to the second mounting hole 105, and a second connecting flange 2212 integrally connected to the second connecting portion 2211 and fixedly connected to the housing 1. The connection method between the second connecting flange 2212 and the housing 1 is the same as that of the first connecting flange, and will not be repeated here. The second bearing 222 is disposed in the second connecting portion 2211 of the second mounting seat 221. The other end of the main shaft 201 passes through the second bearing 222 and is connected to the power source. The power source is used to drive the main shaft 201 to rotate the toothed portion 2021 thereon, so as to produce relative movement with the star wheel 3 to compress the fluid.

[0044] Furthermore, a second mounting cover 223 is provided on the second mounting seat 221. The second mounting cover 223 engages with the second mounting seat 221 to form a second seating groove 224 for positioning the outer ring of the second bearing 222. The upper end of the second connecting portion 2211 extends into the compression chamber 102 and is adjacent to the lower end of the sealing portion 2022. The second connecting portion 2211 is provided with a second through-hole 2213, and the second mounting cover 223 is provided with a third through-hole 2231. The lower end of the main shaft 201 passes through the second through-hole 2213, the inner ring of the second bearing 222, and the third through-hole 2231 in sequence before being connected to the power source.

[0045] Furthermore, to ensure a stable connection between the second bearing 222 and the main shaft 201, a sleeve 225 is sleeved on the main shaft 201 at a position corresponding to the second through-hole 2213. One end of the sleeve 225 extends into the second connecting portion 2211. A positioning ring 226 is sleeved on the main shaft 201 near the second mounting groove 224. The inner ring of the second bearing 222 is positioned between the sleeve 225 and the positioning ring 226, thereby achieving a stable connection between the main shaft 201 and the second bearing 222. In addition, a plurality of semicircular second lubrication grooves 22131 are arranged at intervals along the axial direction of the wall of the second through-hole 2213 to achieve a sliding seal between the sleeve 225 and the second mounting seat 221. The principle of this sliding seal is the same as that of the V-shaped receiving groove 20221 described above and will not be further described here.

[0046] Furthermore, the first bearing 212 is a cylindrical roller bearing to reduce the radial force generated on the upper end of the main shaft 201 when the fluid is sucked in; the second bearing 222 is a double-row ball bearing to reduce the axial force generated on the main shaft 201 when the fluid is compressed, which is beneficial to extending the service life of the main shaft and bearings.

[0047] Based on the above structure, the disassembly process of the screw structure of the present invention is as follows: first, remove the first mounting cover 213, the pad 215, the first bearing 212 and the first mounting seat 211 in sequence; then remove the connection between the second mounting seat 221 and the housing 1 (such as Figure 5 As shown in the state), the second mounting assembly 22 and the screw rotor 20 can be completely removed from the housing 1 downward from one side of the second mounting hole 105, completing the disassembly of the screw mechanism 2.

[0048] In summary, the integrated screw mechanism provided by the present invention provides a V-shaped receiving groove on the sealing part of the screw structure to collect particulate matter generated during the air compression process, thereby reducing the maintenance frequency of the screw rotor and reducing the damage to the compressor caused by particulate matter; the screw rotor is rotatably supported on the compressor through two sets of mounting components, thereby realizing the complete assembly and disassembly of the screw rotor, having a simple structure, easy use, and reducing the maintenance cost of the compressor.

[0049] In the above description, many specific details are set forth in order to fully understand the present invention. However, the above description is only a preferred embodiment of the present invention. The present invention can be implemented in many other ways different from those described herein, so the present invention is not limited by the specific implementation disclosed above. At the same time, any person skilled in the art can use the above-disclosed methods and technical contents to make many possible changes and modifications to the technical solution of the present invention without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of protection of the technical solution of the present invention.

Claims

1. An integrated screw mechanism, provided on a housing (1) of a compressor, wherein the housing (1) is provided with an air inlet (101), a compression chamber (102) and an air outlet (103), wherein the screw mechanism (2) is used to cooperate with a star wheel (3) to drive and compress a fluid sucked from the air inlet (101) into the compression chamber (102), and wherein the screw mechanism (2) is used to ... cooperate with a star wheel (3) to drive and compress a fluid sucked from the air inlet (101) into the compression chamber (102), and wherein the screw mechanism (2) is used to compress a fluid The screw mechanism (2) comprises: A screw rotor (20) comprises a main shaft (201) arranged along the axial direction of the compression chamber (102), and a screw structure (202) sleeved on the main shaft (201), wherein the screw structure (202) comprises a toothed portion (2021) and a sealing portion (2022), wherein the toothed portion (2021) is formed by a plurality of spiral grooves (20211) spirally arranged around its axial direction from one end of the air inlet (101) to one end of the air outlet (103), and the sealing portion (2022) is arranged at the end of the spiral groove (20211) and is connected to the inner wall of the compression chamber (102) in a rolling sealing manner, and a plurality of V-shaped accommodating grooves (20221) are provided on the outer peripheral surface of the sealing portion (2022) along its axial direction. The mounting components are configured into two groups, and the two groups of mounting components are respectively positioned and connected to the two axial ends of the compression chamber (102) of the shell (1) to rotatably support the screw rotor (20) on the shell (1).

2. The integrated screw mechanism according to claim 1, characterized in that: The two groups of mounting components are respectively defined as a first mounting component (21) and a second mounting component (22), wherein the first mounting component (21) and the second mounting component (22) are arranged in radial symmetry; The compression chamber (102) extends through the housing (1) at both axial ends to form a first mounting hole (104) and a second mounting hole (105) on the housing (1); the first mounting assembly (21) and the second mounting assembly (22) are respectively arranged in the first mounting hole (104) and the second mounting hole (105).

3. The integrated screw mechanism according to claim 2, characterized in that: The first mounting assembly (21) comprises: a first mounting seat (211), comprising a first connecting portion (2111) adapted to the first mounting hole (104), and a first connecting flange (2112) integrally connected to the first connecting portion (2111) and fixedly connected to the housing (1); A first bearing (212) is disposed in a first connecting portion (2111) of the first mounting seat (211) and sleeved on one end of the main shaft (201); The second mounting assembly (22) comprises: A second mounting seat (221) comprises a second connecting portion (2211) adapted to the second mounting hole (105), and a second connecting flange (2212) integrally connected to the second connecting portion (2211) and fixedly connected to the housing (1); The second bearing (222) is arranged in the second connecting portion (2211) of the second mounting seat (221), and the other end of the main shaft (201) passes through the second bearing (222) and is connected to the power source.

4. The integrated screw mechanism according to claim 3, characterized in that: One end of the first connecting portion (2111) extends toward the compression chamber (102) into the compression chamber (102) and close to the head end of the spiral groove (20211), and a first through hole (2113) is provided on the first connecting portion (2111) along its axial direction for the main shaft (201) to pass through; The second connecting portion (2211) extends toward one end of the compression chamber (102) into the compression chamber (102) and close to the end of the sealing portion (2022), and a second through hole (2213) is provided on the second connecting portion (2211) along its axial direction for the main shaft (201) to pass through.

5. The integrated screw mechanism according to claim 4, characterized in that: A first mounting cover (213) is provided on the first mounting seat (211), and the first mounting cover (213) is plugged into and matched with the first mounting seat (211) to form a first placement groove (214) for positioning the first bearing (212); A second mounting cover (223) is provided on the second mounting seat (221), and the second mounting cover (223) is plugged into and matched with the second mounting seat (221) to form a second placement groove (224) for positioning the second bearing (222). The second mounting cover (223) is also provided with a third through-hole (2231) for the main shaft (201) to pass through.

6. The integrated screw mechanism according to claim 5, characterized in that: An end of the main shaft (201) corresponding to the first bearing (212) is provided with a docking portion (2011) adapted to the inner ring of the first bearing (212), and an upper end cover of the docking portion (2011) is provided with a pad (215) for positioning the inner ring of the first bearing (212) on the docking portion (2011); A sleeve (225) is sleeved on the main shaft (201) at a position corresponding to the second through hole (2213), one end of the sleeve (225) extends into the second connecting portion (2211), and a positioning ring (226) is sleeved on the main shaft (201) at a position close to the second mounting groove (224), and the inner ring of the second bearing (222) is positioned between the sleeve (225) and the positioning ring (226).

7. The integrated screw mechanism according to claim 6, characterized in that: A plurality of first lubricating grooves (21131) arranged at intervals are provided on the wall of the first through hole (2113) along its axial direction; A plurality of second lubricating grooves (22131) arranged at intervals are provided on the wall of the second through hole (2213) along its axial direction.

8. The integrated screw mechanism according to claim 7, characterized in that: The first lubrication groove (21131) and the second lubrication groove (22131) are both semicircular grooves.

9. The integrated screw mechanism according to claim 3, characterized in that: The first bearing (212) is a cylindrical roller bearing, and the second bearing (222) is a double-row ball bearing.

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