CN217926278U

CN217926278U - Screw machine rotor structure and screw machine

Info

Publication number: CN217926278U
Application number: CN202221955768.0U
Authority: CN
Inventors: 王攀
Original assignee: Shenzhen Jidian Power Technology Co ltd
Current assignee: Shenzhen Jidian Power Technology Co ltd
Priority date: 2022-07-27
Filing date: 2022-07-27
Publication date: 2022-11-29
Anticipated expiration: 2032-07-27

Abstract

The utility model relates to the technical field of screw machines, in particular to a screw machine rotor structure and a screw machine, wherein the screw machine rotor structure comprises a shell, and the shell is provided with a hollow installation cavity; the screw assembly comprises a male screw and a female rotor which are matched with each other, the male screw and the female rotor are arranged in the shell in parallel, and one end of the male screw extends out relative to the shell; the transmission assembly comprises a main gear and a driven gear which are meshed with each other; a water lubricated bearing assembly comprising a first water lubricated bearing and a second water lubricated bearing; an oil lubricated bearing assembly located between the drive assembly and the water lubricated bearing assembly. The utility model discloses can promote the volume efficiency, reduce manufacturing cost, satisfy high load and high rotational speed's application simultaneously.

Description

Screw machine rotor structure and screw machine

Technical Field

The utility model relates to a screw rod machine technical field especially relates to a screw rod machine rotor structure and screw rod machine.

Background

The conventional design idea of the rotor structure of the water-lubricated screw machine is to design two rotor supporting bearings of the screw machine into two water-lubricated bearings, and spray water to reduce temperature and lubricate the interior of a screw; some designs also increase water lubricated synchronizing teeth. In such a system with full water lubrication, compared with a mature oil injection screw rotor structure, the screw machine with water lubrication is usually designed by a stainless steel material rotor or an alloy steel material coated rotor structure because of low viscosity of water and easy corrosion. However, since the hardness and rigidity of the stainless steel material and the corrosion-resistant plating layer tend to be low, and due to the low viscosity of water, seizure easily occurs without sufficient lubrication when the rotors mesh. Moreover, because water lubricated bearings cannot carry high loads and operate at high speeds, the rotational speed of water lubricated screw machines tends to be low, with lower screw machine rotational speeds marking lower volumetric efficiency. Therefore, the current screw machine rotor structure adopting water lubrication cannot support high-load and high-rotation-speed application at the same time.

Therefore, a rotor structure of a screw machine and a screw machine are required to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a screw rod machine rotor structure and screw rod machine can promote the volume efficiency, reduces manufacturing cost, satisfies high load and high rotational speed application simultaneously.

To achieve the purpose, the utility model adopts the following technical proposal:

a screw machine rotor structure comprises a shell, a rotor and a rotor, wherein the shell is provided with a hollow mounting cavity; further comprising:

the screw assembly comprises a male screw and a female rotor which are matched with each other, the male screw and the female rotor are arranged in the shell in parallel, and one end of the male screw extends out relative to the shell;

the transmission assembly comprises a main gear and a driven gear which are meshed with each other, the main gear is arranged on the male screw, and the driven gear is arranged on the female rotor;

a water lubricated bearing assembly including a first water lubricated bearing disposed on the male screw and a second water lubricated bearing disposed on the female rotor;

and the oil lubrication bearing assembly is positioned between the transmission assembly and the water lubrication bearing assembly and comprises a first oil lubrication bearing and a second oil lubrication bearing, the first oil lubrication bearing is arranged on the male screw, and the second oil lubrication bearing is arranged on the female rotor.

Further, still include the water seal subassembly, the water seal subassembly includes first water seal spare and second water seal spare, first water seal spare cover is established on the positive screw rod, and is located oil lubrication bearing subassembly with between the helicoid of positive screw rod, second water seal spare cover is established on the negative rotor, and is located oil lubrication bearing subassembly with between the helicoid of negative rotor.

Furthermore, a first annular water cavity is formed between the first water seal piece and the male screw in an enclosing mode, a first water inlet and a first water outlet which are communicated with the first annular water cavity are formed in the first water seal piece at intervals, and the distance from the first water inlet to the first oil lubricating bearing is larger than the distance from the first water outlet to the first oil lubricating bearing.

Further, a first spiral groove is formed in the male screw and communicated with the first annular water cavity, the first spiral groove is located between the first annular water cavity and the spiral surface of the male screw, and the pitch of the first spiral groove is gradually increased in the direction from the first annular water cavity to the spiral surface of the male screw.

Furthermore, a second annular water cavity is formed between the second water seal piece and the female rotor in an enclosing mode, a second water inlet and a second water outlet which are communicated with the second annular water cavity are formed in the second water seal piece at intervals, and the distance from the second water inlet to the second oil lubricating bearing is larger than the distance from the second water outlet to the second oil lubricating bearing.

Further, a second spiral groove is formed in the female rotor and communicated with the second annular water cavity, the second spiral groove is located between the second annular water cavity and the spiral surface of the female rotor, and the pitch of the second spiral groove is gradually increased in the direction from the second annular water cavity to the spiral surface of the female rotor.

Furthermore, the inner ring surface of the first water seal piece and the inner ring surface of the second water seal piece are both in a comb shape.

Further, still include oil blanket subassembly, oil blanket subassembly includes first oil blanket spare and second oil blanket spare, first oil blanket spare sets up on the male screw rod, and is located first oil lubrication bearing with between the first water blanket spare, second oil blanket spare sets up on the negative rotor, and is located second oil lubrication bearing with between the second water blanket spare.

Furthermore, the shell is provided with an air inlet and an air outlet which are communicated with the installation cavity, the air inlet and the air outlet are positioned at two ends of the shell, and the air collecting barrel is arranged on the shell and is communicated with the air outlet.

A screw machine comprising a screw machine rotor structure as described above.

The utility model has the advantages that:

the utility model provides a pair of screw rod machine rotor structure, be provided with the male screw rod and the cloudy rotor of mutually supporting in the casing, male screw rod and cloudy rotor carry out work through master gear and driven gear's meshing transmission, be provided with first water lubrication bearing and first oil lubrication bearing on male screw rod, first oil lubrication bearing is located between first water lubrication bearing and the master gear, be provided with second water lubrication bearing and second oil lubrication bearing on cloudy rotor, second oil lubrication bearing is located between second water lubrication bearing and the driven gear, adopt oil lubrication's mechanical bearing to hold screw rod machine's heavy load, the unit structure is simplified with water lubrication bearing, can promote the volumetric efficiency, reduce manufacturing cost, satisfy high load and high rotational speed's application simultaneously.

The utility model provides a screw machine, include as above screw machine rotor structure, can promote the volume efficiency, reduce manufacturing cost, satisfy high load and high rotational speed application simultaneously.

Drawings

Fig. 1 is a sectional view of a rotor structure of a screw machine according to the present invention;

fig. 2 is a view of a view angle of a rotor structure of a screw machine according to the present invention.

In the figure:

1. a housing; 11. an air inlet; 12. an exhaust port; 2. a male screw; 21. a main gear; 22. a first water lubricated bearing; 23. a first oil-lubricated bearing; 24. a first water seal; 25. a first helical groove; 26. a first oil seal; 27. a first water inlet; 28. a first water outlet; 3. a female rotor; 31. a driven gear; 32. a second water lubricated bearing; 33. a second oil lubricated bearing; 34. a second water seal; 35. a second helical groove; 36. a second oil seal; 37. a second water inlet; 38. a second water outlet; 4. a gas collecting barrel; 5. an electric motor.

Detailed Description

The technical solution of the present invention will be further explained with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements related to the present invention are shown in the drawings.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation of the first and second features not being in direct contact, but being in contact with another feature between them. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Because the water lubricated bearings cannot carry high loads and run at high speeds, the rotational speed of the water lubricated screw machine is often low, and lower rotational speeds of the screw machine mark lower volumetric efficiency. Therefore, the current screw machine rotor structure adopting water lubrication cannot support high-load and high-rotation-speed application at the same time.

In order to solve the above-mentioned problem, promote the volumetric efficiency of screw rod machine rotor structure, reduce manufacturing cost, satisfy the application of high load and high rotational speed simultaneously, as shown in fig. 1-2, the utility model provides a screw rod machine rotor structure. The rotor structure of the screw machine comprises a shell 1, a screw assembly, a transmission assembly, a water lubrication bearing assembly and an oil lubrication bearing assembly.

Wherein, the shell 1 is provided with a hollow installation cavity; the screw assembly comprises a male screw 2 and a female rotor 3 which are matched with each other, the male screw 2 and the female rotor 3 are arranged in a mounting cavity of the shell 1 in parallel, one end of the male screw 2 extends out relative to the shell 1, and one end of the male screw 2 extending out relative to the shell 1 is in transmission connection with the motor 5; the transmission assembly comprises a main gear 21 and a driven gear 31 which are meshed with each other, the main gear 21 is arranged on the male screw rod 2, and the driven gear 31 is arranged on the female rotor 3; the water lubricated bearing assembly comprises a first water lubricated bearing 22 and a second water lubricated bearing 32, wherein the first water lubricated bearing 22 is arranged on the male screw rod 2, and the second water lubricated bearing 32 is arranged on the female rotor 3; the oil-lubricated bearing assembly comprises a first oil-lubricated bearing 23 and a second oil-lubricated bearing 33, the first oil-lubricated bearing 23 is arranged on the male screw rod 2, the second oil-lubricated bearing 33 is arranged on the female rotor 3, and the distance from the oil-lubricated bearing assembly to the transmission assembly is smaller than the distance from the water-lubricated bearing assembly to the driving device.

The male screw 2 is provided with a first water lubricating bearing 22 and a first oil lubricating bearing 23, the first oil lubricating bearing 23 is positioned between the first water lubricating bearing 22 and the male screw 21, the female rotor 3 is provided with a second water lubricating bearing 32 and a second oil lubricating bearing 33, the second oil lubricating bearing 33 is positioned between the second water lubricating bearing 32 and the driven gear 31, the oil lubricating mechanical bearing is adopted to bear the large load of the screw machine, the water lubricating bearings simplify the structure of the machine set, the volumetric efficiency can be improved, the manufacturing cost is reduced, and the application of high load and high rotating speed is met.

Further, the output shaft of the motor 5 is a hollow shaft, the output shaft of the motor 5 is in interference fit with the male screw 2, or the output shaft of the motor 5 and the male screw 2 are integrally designed, so that the cost of the unit can be reduced, and the efficiency and the reliability of the unit can be improved. In other embodiments, a coupling may be used for the connection, which is not limited herein.

Furthermore, the transmission assembly is lubricated by oil bath, so that the synchronization requirement of the meshing of the screw assemblies can be fully met, the precision and material requirements of the water-lubricated screw assemblies are reduced, and the screw assemblies cannot be seized when running at high speed. In this embodiment, the female rotor 3 is enclosed in the housing 1, and the outer side of the male screw 2 is installed on the rotor of the motor 5, so as to form an integrated structure, so that the unit has a compact and efficient structure, and meanwhile, the stator of the motor 5 is cooled by oil, so that the operating temperature of the motor 5 is lower, the reliability of the motor 5 is enhanced, the unit cost can be reduced, and the efficiency and the reliability of the unit are improved. .

Further, the casing 1 is provided with an air inlet 11 and an air outlet 12 which are communicated with the installation cavity, the air inlet 11 and the air outlet 12 are positioned at two ends of the casing 1, and the gas collecting barrel 4 is arranged on the casing 1 and is communicated with the air outlet 12. Specifically, the water lubricated bearing assembly is arranged on the side of the housing 1 away from the motor 5, and the side of the housing 1 away from the motor 5 can be an air inlet 11 or an air outlet 12. In the case of the air inlet 11, air and water for lubricating the bearing enter the screw assembly together to be compressed, the water plays a role in cooling and sealing the compression process and can lubricate the water-lubricated bearing assembly, and the air outlet 12 discharges the air to the air collecting barrel 4. When the end of the casing 1 far away from the motor 5 is the exhaust port 12, the air inlet 11 near the end of the motor 5 does not need to be provided with a water seal assembly, and the structure of the unit is further simplified.

Further, the screw machine rotor structure further comprises a water seal assembly, the water seal assembly comprises a first water seal piece 24 and a second water seal piece 34, the first water seal piece 24 is sleeved on the male screw rod 2 and is located between the oil lubrication bearing assembly and the spiral surface of the male screw rod 2, and the second water seal piece 34 is sleeved on the female rotor 3 and is located between the oil lubrication bearing assembly and the spiral surface of the female rotor 3. Through setting up first water seal and second water seal, can prevent that gas from overflowing through the clearance between screw rod subassembly and the casing 1 in the screw rod machine work's in-process, promote the performance of screw rod machine.

Further, enclose between first water seal 24 and the male screw 2 and establish and form first annular water cavity, first water inlet 27 and the first delivery port 28 with first annular water cavity intercommunication are seted up at the interval on the first water seal 24, and the distance of first water inlet 27 to first oil-lubricated bearing 23 is greater than the distance of first delivery port 28 to first oil-lubricated bearing 23. Through setting up first delivery port 28 and first water inlet 27, be convenient for fill water in first annular water cavity, utilize water to seal first annular water cavity to play the effect that prevents gas leakage, guarantee the ability of calming anger of screw machine. In order to provide water conveniently, the first water inlet 27 is communicated with the gas collecting barrel 4 through a water inlet pipeline, and water in the gas collecting barrel 4 is fully utilized to form outlet circulation; the first water outlet 28 is communicated with the air inlet 11 of the housing 1 through a pipeline to form an inlet circulation, thereby forming a completed internal circulation, ensuring the stability of water supply to the first annular water cavity and simplifying the structure.

Further, the male screw 2 is provided with a first spiral groove 25, the first spiral groove 25 is communicated with the first annular water cavity, the first spiral groove 25 is located between the first annular water cavity and the spiral surface of the male screw 2, and the pitch of the first spiral groove 25 is gradually increased from the first annular water cavity to the spiral surface of the male screw 2. The first spiral groove 25 is utilized to form a pumping effect, part of water in the first annular water cavity is sucked into the screw assembly and enters the gas collecting barrel 4 through the gas outlet 12 to form outlet circulation, so that the screw assembly can be further cooled, and the high-speed and high-load working performance of the screw assembly is improved.

Further, a second annular water cavity is formed between the second water seal member 34 and the female rotor 3 in an enclosing manner, a second water inlet 37 and a second water outlet 38 which are communicated with the second annular water cavity are formed in the second water seal member 34 at intervals, and the distance from the second water inlet 37 to the second oil lubricating bearing 33 is greater than the distance from the second water outlet 38 to the second oil lubricating bearing 33. Through setting up second delivery port 38 and second water inlet 37, be convenient for fill water in second annular water cavity, utilize water to seal second annular water cavity to play the effect that prevents gas leakage, guarantee the ability of calming anger of screw machine. In order to provide water conveniently, the second water inlet 37 is communicated with the gas collecting barrel 4 through a water inlet pipeline, so that water in the gas collecting barrel 4 is fully utilized, and an outlet circulation is formed; the second water outlet 38 is communicated with the air inlet 11 of the housing 1 through a pipeline to form an inlet circulation, so that a completed internal circulation is formed, the stability of supplying water to the second annular water cavity is ensured, and the structure is simplified.

Further, the female rotor 3 is provided with a second spiral groove 35, the second spiral groove 35 is communicated with a second annular water cavity, the second spiral groove 35 is located between the second annular water cavity and the spiral surface of the female rotor 3, and the pitch of the second spiral groove 35 is gradually increased from the second annular water cavity to the spiral surface of the female rotor 3. Utilize second helicla flute 35 to form the pump effect of pumping, inhale the screw rod subassembly with the water that part is located second annular water cavity in, can further cool off the screw rod subassembly, promote the high-speed and high-load working property of screw rod subassembly, inspiratory water rethread gas vent 12 enters into gas collecting barrel 4, forms the entry circulation.

Further, the inner annular surface of the first water seal member 24 and the inner annular surface of the second water seal member 34 are both comb-shaped. Part of the water in the first annular water chamber flows out through the first water outlet 28 at the end remote from the first spiral groove 25, and part of the water in the second annular water chamber flows out through the second water outlet 38 at the end remote from the second spiral groove 35. By designing the inner annular surface of the first water seal 24 and the inner annular surface of the second water seal 34 to be comb-shaped, a pressure reduction effect can be achieved, and the pressure on the outlet side can be reduced.

Further, the rotor structure of the screw machine further comprises an oil seal assembly, the oil seal assembly comprises a first oil seal part 26 and a second oil seal part 36, the first oil seal part 26 is fixedly arranged on the male screw 2 and is positioned between the first oil lubricating bearing 23 and the first water seal part 24, and the second oil seal part 36 is fixedly arranged on the female rotor 3 and is positioned between the second oil lubricating bearing 33 and the second water seal part 34. By providing the first oil seal 26 and the second oil seal 36, the function of preventing the leakage of the lubricating oil can be achieved. Meanwhile, the inner annular surface of the first water seal part 24 and the inner annular surface of the second water seal part 34 are designed to be comb-tooth-shaped, so that the comb teeth can reduce pressure, and therefore the requirements can be met by adopting one lip seal for the first oil seal part 26 and the second oil seal part 36. The sealing performance is guaranteed, meanwhile, the structural complexity of the first oil seal 26 and the second oil seal 36 is reduced, and the cost is reduced. And the high-pressure sealing design without friction parts and wearing parts is adopted, so that the unit can be free of maintenance.

The embodiment also provides a screw machine, which comprises the screw machine rotor structure, can improve the volume efficiency, reduce the manufacturing cost and simultaneously meet the application of high load and high rotating speed.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement or improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A screw machine rotor structure comprises a shell (1), wherein the shell (1) is provided with a hollow installation cavity; it is characterized by also comprising:

the screw assembly comprises a male screw (2) and a female rotor (3) which are matched with each other, the male screw (2) and the female rotor (3) are arranged in the shell (1) in parallel, and one end of the male screw (2) extends out relative to the shell (1);

a transmission assembly comprising a main gear (21) and a driven gear (31) which are mutually meshed, the main gear (21) being arranged on the male screw (2), the driven gear (31) being arranged on the female rotor (3);

a water lubricated bearing assembly comprising a first water lubricated bearing (22) and a second water lubricated bearing (32), the first water lubricated bearing (22) being provided on the male screw (2), the second water lubricated bearing (32) being provided on the female rotor (3);

an oil lubricated bearing assembly located between the drive assembly and the water lubricated bearing assembly, comprising a first oil lubricated bearing (23) and a second oil lubricated bearing (33), the first oil lubricated bearing (23) being disposed on the male screw (2), the second oil lubricated bearing (33) being disposed on the female rotor (3).

2. The rotor structure of the screw machine according to claim 1, further comprising a water seal assembly, wherein the water seal assembly comprises a first water seal member (24) and a second water seal member (34), the first water seal member (24) is sleeved on the male screw (2) and is located between the oil lubrication bearing assembly and the screw surface of the male screw (2), and the second water seal member (34) is sleeved on the female rotor (3) and is located between the oil lubrication bearing assembly and the screw surface of the female rotor (3).

3. A rotor structure of a screw machine according to claim 2, characterized in that a first annular water cavity is enclosed between the first water seal member (24) and the male screw (2), a first water inlet (27) and a first water outlet (28) which are communicated with the first annular water cavity are arranged on the first water seal member (24) at intervals, and the distance from the first water inlet (27) to the first oil-lubricated bearing (23) is larger than the distance from the first water outlet (28) to the first oil-lubricated bearing (23).

4. A rotor structure of a screw machine according to claim 3, characterised in that the male screw (2) is provided with a first helical groove (25), the first helical groove (25) communicating with the first annular water chamber, the first helical groove (25) being located between the first annular water chamber and the helicoid of the male screw (2), the pitch of the first helical groove (25) increasing in steps from the first annular water chamber to the helicoid of the male screw (2).

5. A rotor structure of a screw machine according to claim 2, characterized in that a second annular water chamber is enclosed between the second water seal (34) and the female rotor (3), a second water inlet (37) and a second water outlet (38) which are communicated with the second annular water chamber are arranged on the second water seal (34) at intervals, and the distance from the second water inlet (37) to the second oil-lubricated bearing (33) is larger than the distance from the second water outlet (38) to the second oil-lubricated bearing (33).

6. A rotor structure of a screw machine according to claim 5, characterized in that the female rotor (3) is provided with a second helical groove (35), the second helical groove (35) is in communication with the second annular water chamber, the second helical groove (35) is located between the second annular water chamber and the helicoid of the female rotor (3), and the pitch of the second helical groove (35) increases gradually from the second annular water chamber to the helicoid of the female rotor (3).

7. The screw machine rotor structure according to claim 2, characterized in that the inner ring surface of the first water sealing piece (24) and the inner ring surface of the second water sealing piece (34) are both in a comb shape.

8. A screw machine rotor structure according to claim 2, further comprising an oil seal assembly comprising a first oil seal (26) and a second oil seal (36), the first oil seal (26) being provided on the male screw (2) between the first oil-lubricated bearing (23) and the first water seal (24), the second oil seal (36) being provided on the female rotor (3) between the second oil-lubricated bearing (33) and the second water seal (34).

9. The screw machine rotor structure of claim 1, wherein the housing (1) is provided with an air inlet (11) and an air outlet (12) which are communicated with the installation cavity, the air inlet (11) and the air outlet (12) are positioned at two ends of the housing (1), and the air collecting barrel (4) is arranged on the housing (1) and is communicated with the air outlet (12).

10. A screw machine, characterized in that it comprises a screw machine rotor structure according to any one of claims 1-9.