Multi-shaft transmission mechanism and compressor

Abstract

The multi-shaft transmission mechanism comprises a first gear, a second gear, a first-stage rotor, a second-stage and third-stage rotor and a fourth-stage and fifth-stage rotor, the first-stage rotor is located on the side, away from the second gear, of the first gear, and the second-stage and third-stage rotor and the fourth-stage and fifth-stage rotor are located on the side, away from the first gear, of the second gear. The first gear is connected with the second gear in a meshed mode, the first gear is connected with the first-stage rotor, the second gear is connected with the second-stage rotor and the third-stage rotor, and the second gear is connected with the fourth-stage rotor and the fifth-stage rotor. Under the conditions of large flow, large power and large load, the transmission mechanism of the compressor is compact in mechanical property and structural form, easy to process, more convenient to install, lower in cost and higher in economical efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of compressors, in particular to a multi-axis transmission mechanism and a compressor. Background Art

[0002] Centrifugal compressors are core key equipment widely used in petrochemical, coal deep processing, fertilizer and metallurgical industries. In recent years, with the increase of compressor process flow, they have gradually developed from single-shaft multi-stage compressors to multi-shaft multi-stage compressors. Compared with single-shaft multi-stage compressors, multi-shaft multi-stage compressors have the advantages of multiple speeds, axial air intake for each stage of impeller, self-cooling after compression, high operating efficiency, good operating effect, and low mechanical energy consumption. However, large multi-shaft centrifugal compressors have high requirements on the mechanical properties of power transmission materials. Traditional transmission structures are difficult to meet the requirements of applications under large flow and large load conditions, and the processing difficulty and cost are relatively high. The utility model proposes a new solution to the above problems. Utility Model Content

[0003] In order to overcome at least one of the above-mentioned disadvantages, the present invention provides a multi-axis transmission mechanism and a compressor. The purpose of the present invention can be achieved by adopting the following technical solutions:

[0004] In a first aspect of the utility model, a multi-axis transmission mechanism is provided, comprising a first gear, a second gear, a first-stage rotor, second- and third-stage rotors, and a fourth- and fifth-stage rotor, wherein the first-stage rotor is located on a side of the first gear away from the second gear, the second- and third-stage rotors and the fourth- and fifth-stage rotor are located on a side of the second gear away from the first gear, the first gear is meshed with the second gear, the first gear is connected to the first-stage rotor, the second gear is connected to the second- and third-stage rotors, and the second gear is connected to the fourth- and fifth-stage rotors.

[0005] In one possible implementation manner, the first gear is connected to a power input of a compressor.

[0006] In one possible implementation manner, the first gear is meshingly connected to the first-stage rotor, the second gear is meshingly connected to the second- and third-stage rotors, and the second gear is meshingly connected to the fourth- and fifth-stage rotors.

[0007] In one possible implementation, the second and third stage rotors and the fourth and fifth stage rotors are symmetrically arranged.

[0008] In one possible implementation, the first gear is a forged integral structure.

[0009] In one possible implementation manner, the second gear is a forged shaft and forged gear ring connection structure.

[0010] In one possible implementation manner, the first gear, the second gear and the primary rotor are thrust bearing structures.

[0011] In one possible implementation manner, the second and third stage rotors and the fourth and fifth stage rotors are thrust plate structures.

[0012] In one possible implementation manner, an end face tooth connection structure is formed between the impellers and shafts of the first-stage rotor, the second-stage rotor, the third-stage rotor, and the fourth-stage rotor.

[0013] A second aspect of the utility model provides a compressor, comprising any one of the multi-shaft transmission mechanisms described above.

[0014] Beneficial technical effects of the utility model: According to the contents of the present disclosure, the multi-axis transmission mechanism and the compressor can meet the mechanical properties of the compressor transmission mechanism under conditions of large flow, high power and large load, reduce the overall structure of the compressor, have a compact structure, are easy to process, are more convenient to install, have lower costs and are more economical.

[0015] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In the accompanying drawings, the following are given by way of example and not limitation:

[0017] Figure 1 The overall structure schematic diagram of the utility model is shown;

[0018] Figure 2 Shows Figure 1 A-section structure enlarged schematic diagram.

[0019] In the figure: 1. First gear; 2. Second gear; 3. First-stage rotor; 4. Second- and third-stage rotors; 5. Fourth- and fifth-stage rotors. DETAILED DESCRIPTION

[0020] In the following detailed disclosure, these embodiments are fully described with reference to the drawings. In order to make the technical scheme of the utility model more clear and specific to those skilled in the art, the implementation methods described below are not limited to this. The utility model is further described in detail below in combination with the embodiments and drawings.

[0021] In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0022] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as "up", "down", "left", "right", "front" and "back" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation on the present invention.

[0023] The first aspect of the utility model is as follows Figure 1 As shown, a multi-axis transmission mechanism is provided, including a first gear 1, a second gear 2, a first-stage rotor 3, second- and third-stage rotors 4, and a fourth- and fifth-stage rotor 5. The first-stage rotor 3 is located on a side of the first gear 1 away from the second gear 2, the second- and third-stage rotors 4 and the fourth- and fifth-stage rotor 5 are located on a side of the second gear 2 away from the first gear 1, the first gear 1 is meshedly connected with the second gear 2, the first gear 1 is connected to the first-stage rotor 3, the second gear 2 is connected to the second- and third-stage rotors 4, and the second gear 2 is connected to the fourth- and fifth-stage rotor 5.

[0024] The multi-axis transmission mechanism and the compressor can meet the mechanical properties of the compressor transmission mechanism under conditions of large flow, high power and large load, reduce the overall structure of the compressor, have a compact structure, are easy to process, are more convenient to install, have lower cost and are more economical.

[0025] This multi-axis transmission mechanism can be used under conditions of large flow and large load, and has good mechanical properties under large load conditions. It can not only ensure the transmission needs of high power, but also improve the convenience of processing. At the same time, it can save power consumption, reduce costs and increase efficiency, thereby improving the economy of the compressor.

[0026] In one embodiment, the first gear 1 is connected to the power input part of the compressor. Further, the first gear 1 is a forged integral structure.

[0027] It can be understood that the first gear 1 is a compressor pinion, which is the main power input component of the compressor and is made of an integral forging, ensuring good mechanical properties under high load conditions, stable structure and high strength.

[0028] In one possible implementation manner, the first gear 1 is meshedly connected to the first-stage rotor 3 , the second gear 2 is meshedly connected to the second- and third-stage rotors 4 , and the second gear 2 is meshedly connected to the fourth- and fifth-stage rotors 5 .

[0029] It can be understood that the first gear 1 transmits power to the first-stage rotor 3 through tooth meshing, the first gear 1 transmits power to the second- and third-stage rotors 4 through tooth meshing of the second gear 2, and the first gear 1 transmits power to the fourth- and fifth-stage rotors 5 through tooth meshing of the second gear 2.

[0030] The second gear 2 can receive the power transmitted by the exhaust gas expander to reduce the power input by the first gear 1, thereby achieving the effect of saving power consumption.

[0031] The multi-axis transmission mechanism uses a small gear to drive the first-stage rotor 3 and the large gear, and then the large gear drives the second-stage and third-stage rotors 4 and the fourth-stage and fifth-stage rotors 5 to meet the speed and power of each stage of the impeller. The pressure of each level is relatively small, so that the compressor is more efficient and can provide more compression efficiency. At the same time, it can reduce the wear of the machine, extend the life of the machine, and greatly reduce the operating cost.

[0032] In one possible implementation, the second and third stage rotors 4 and the fourth and fifth stage rotors 5 are symmetrically arranged.

[0033] Furthermore, the second and third stage rotors 4 and the fourth and fifth stage rotors 5 are symmetrically arranged, which improves the balance during the rotation process, reduces the vibration of the compressor, and has a higher output efficiency.

[0034] In one possible implementation, the second gear 2 is a forged shaft and forged gear ring connection structure.

[0035] It can be understood that the second gear 2 is a large gear of the compressor, and the second gear 2 adopts a forged shaft and a forged gear ring connection structure, which can ensure the need for high-power transmission and also improve the convenience of processing.

[0036] In one possible implementation, the first gear 1, the second gear 2 and the first-stage rotor 3 are thrust bearing structures, that is, the small gear, the large gear and the first-stage rotor 3 use separate thrust bearings to balance the meshing force and the pneumatic thrust, and the thrust bearing is composed of a bearing housing and internal balls, cylinders and other parts, and has good load-bearing capacity when bearing axial loads and radial loads.

[0037] In one possible implementation manner, the second and third stage rotors 4 and the fourth and fifth stage rotors 5 are thrust disk structures, which are usually composed of disc-shaped parts and springs, and are mainly used to control axial force and vibration, that is, the second and third stage rotors 4 and the fourth and fifth stage rotors 5 use thrust disk structures to balance the meshing force and aerodynamic thrust.

[0038] In one possible implementation, Figure 1 and Figure 2 As shown, the impellers and shafts of the first-stage rotor 3, the second-stage rotor 4, and the fourth-stage rotor 5 are connected by end face gears.

[0039] It can be understood that the face gear is a bevel gear with a conical tooth surface. Face gears are usually used in pairs, that is, one face gear is used in conjunction with another, and their tooth surfaces are meshed on intersecting axes, so that force can be transmitted from one axial direction to another. The face gear connection is a transmission gear between intersecting axes. Its principle is based on conjugate curves, which can change the direction and torque of the transmission.

[0040] It can be understood that the end face tooth connection is a connection method with mutually fitting shapes and can be frequently disassembled. It has high-precision self-centering, good repeatability of axial and radial circular runout, and does not affect the balance of the completed parts. It can ensure the balance of the compressor transmission mechanism.

[0041] In traditional processes, the connection between the pinion shaft and the impeller usually adopts positioning methods such as cone triangle, flange, axial pin, end pin, red sleeve or arc surface & single pin, and then the overall connection of the rotor and the impeller is achieved by elastic deformation of the tightening bolts to achieve the purpose of static combination. The above-mentioned connection methods have their own advantages and disadvantages, and there are problems such as inaccurate positioning, difficult processing, rework, cumbersome spare parts processing and long cycle. The end face tooth connection between the impeller and the shaft can well solve this series of problems.

[0042] The second aspect of the utility model is as follows Figure 1 and Figure 2 As shown, a compressor is provided, comprising any one of the multi-shaft transmission mechanisms described above.

[0043] The compressor adopts any of the multi-axis transmission mechanisms described above and can be used under conditions of larger flow and higher load. The flow rate can reach 37,400 kg / h and the power can reach more than 52,000 kW. It can greatly promote the development and improvement of large multi-axis centrifugal compressors under large flow and large load process conditions, and plays a positive role in promoting the development of multi-axis compressors, reducing costs and increasing efficiency, and enhancing product competitiveness.

[0044] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0045] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0046] In view of the above detailed description, these and other changes can be made to these embodiments, and this written description includes the best mode embodiments to disclose the utility model. The scope of the patent obtained by the utility model is defined by the claims, and the claims are not limited by the content of the present disclosure. The protection scope of the utility model is not limited thereto. Any technician familiar with the technical field within the scope disclosed by the utility model, according to the technical solution and its concept of the utility model, makes equivalent replacement or change, which is within the protection scope of the utility model.

Claims

1. A multi-axis transmission mechanism, characterized in that: The invention comprises a first gear (1), a second gear (2), a first-stage rotor (3), a second-stage rotor (4) and a fourth-stage rotor (5), wherein the first-stage rotor (3) is located on a side of the first gear (1) away from the second gear (2), the second-stage rotor (4) and the fourth-stage rotor (5) are located on a side of the second gear (2) away from the first gear (1), the first gear (1) and the second gear (2) are meshingly connected, the first gear (1) is connected to the first-stage rotor (3), the second gear (2) is connected to the second-stage rotor (4), and the second gear (2) is connected to the fourth-stage rotor (5).

2. The multi-axis transmission mechanism according to claim 1, characterized in that: The first gear (1) is connected to the power input part of the compressor.

3. The multi-axis transmission mechanism according to claim 2, characterized in that: The first gear (1) is meshingly connected to the first-stage rotor (3), the second gear (2) is meshingly connected to the second- and third-stage rotors (4), and the second gear (2) is meshingly connected to the fourth- and fifth-stage rotors (5).

4. The multi-axis transmission mechanism according to claim 3, characterized in that: The second and third stage rotors (4) and the fourth and fifth stage rotors (5) are symmetrically arranged.

5. The multi-axis transmission mechanism according to claim 1, characterized in that: The first gear (1) is a forged integral structure.

6. The multi-axis transmission mechanism according to claim 1, characterized in that: The second gear (2) is a forged shaft and forged gear ring connection structure.

7. The multi-axis transmission mechanism according to claim 1, characterized in that: The first gear (1), the second gear (2) and the primary rotor (3) are thrust bearing structures.

8. The multi-axis transmission mechanism according to claim 7, characterized in that: The second and third stage rotors (4) and the fourth and fifth stage rotors (5) are thrust disk structures.

9. The multi-axis transmission mechanism according to claim 1, characterized in that: The impellers and shafts of the first-stage rotor (3), the second-stage rotor (4), and the fourth-stage rotor (5) are connected by end face tooth structures.

10. A compressor, characterized in that: It comprises a multi-axis transmission mechanism as described in any one of claims 1 to 9.

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