A cooler assembly and wind power gearbox

Abstract

The present invention discloses a cooler assembly and a wind turbine gearbox, belonging to the technical field of wind power generation equipment. The cooler assembly is used on a vibration device, and the cooler assembly includes a cooler body and a spring damping assembly, wherein an installation space is provided between the cooler body and the vibration device; the spring damping assembly is provided in the installation space, and is respectively connected to the cooler body and the vibration device, and the stiffness of the spring damping assembly is adjusted according to the vibration frequency generated by the vibration device and the mass of the cooler body. The wind turbine gearbox includes the above. Cooler assembly. The cooler assembly and the wind turbine gearbox of the present invention, according to the vibration frequency generated by different vibration devices and the mass of the cooler body, adjust the stiffness of the spring damping assembly to match the optimal frequency ratio of the dynamic vibration absorber, optimize the vibration reduction effect, have a flexible structure, are easy to install, and can meet the vibration reduction requirements of different models.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation equipment, and in particular to a cooler assembly and a wind power gear box. Background Art

[0002] The cooler assembly of a wind turbine gearbox is generally installed at the front end of the wind turbine gearbox. Due to the low-speed meshing frequency excitation and high-speed shaft rotation frequency excitation of the wind turbine gearbox, the cooler assembly often swings laterally, causing damage to the structure of the cooler assembly; especially when the overall natural frequency of the cooler assembly is close to the above excitation frequency, resonance will occur. Therefore, the excessive amplitude of the cooler assembly has always been a problem that needs to be solved urgently.

[0003] When the amplitude of the gearbox cooler assembly is too large, the traditional solution is to avoid resonance by increasing the stiffness of the cooler mounting structure. Common methods include adding supporting ribs, increasing the number of mounting bolts, increasing the thickness of the structure, etc. However, these methods cannot reduce vibration at specific resonance peak frequencies and sometimes the vibration reduction effect is not obvious. Summary of the invention

[0004] The object of the present invention is to provide a cooler assembly which optimizes the vibration reduction effect, has a flexible structure, is easy to install and has good applicability.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] A cooler assembly is used on a vibration device, and the cooler assembly includes:

[0007] An installation space is provided between the cooler body and the vibration device;

[0008] The spring damping assembly is arranged in the installation space and is respectively connected to the cooler body and the vibration device. The stiffness of the spring damping assembly is adjusted according to the vibration frequency generated by the vibration device and the mass of the cooler body.

[0009] Optionally, the spring damping assembly includes an elastic body, and the cooler assembly further includes:

[0010] A first mounting plate connected to the vibration device;

[0011] A second mounting plate is connected to the cooler body, and a mounting space is formed between the second mounting plate and the first mounting plate;

[0012] The elastic body is connected to the first mounting plate and the second mounting plate respectively.

[0013] Optionally, the elastic body is a rotating body, and the rotating body includes:

[0014] The rotation plane is in the shape of a parallelogram, and the parallelogram includes a first side and a second side arranged opposite to the first side;

[0015] The axis of the rotating body is parallel to the first side and the second side. The distance between the axis of the rotating body and the first side is R1, and the distance between the axis of the rotating body and the second side is R2, wherein R2>R1.

[0016] Optionally, the spring damper assembly further comprises:

[0017] A first connecting member, connecting the elastic body and the first mounting plate;

[0018] The second connecting member connects the elastic body and the second mounting plate.

[0019] Optionally, the first side rotates around the axis of the rotating body to form a mounting hole, and the first connecting member is inserted into the mounting hole, and the first connecting member includes:

[0020] A first side wall connected to the mounting hole;

[0021] The first end plate is arranged at the end of the first side wall, and the first end plate is connected to the first mounting plate.

[0022] Optionally, the second side rotates around the axis of the rotating body to form a mounting side wall, and the second connecting member is sleeved on the mounting side wall, and the second connecting member includes:

[0023] A second side wall connected to the mounting side wall;

[0024] The second end plate is arranged at the end of the second side wall, and the second end plate is connected to the second mounting plate.

[0025] Optionally, the elastic body is a rubber body, and the first connecting member and the second connecting member are both metal plates.

[0026] Optionally, the first connecting member is detachably connected to the first mounting plate via a fastener, and the second connecting member is detachably connected to the second mounting plate via a fastener.

[0027] Optionally, a vulcanized adhesive layer is provided between the first connecting member and the elastomer, and a vulcanized adhesive layer is provided between the second connecting member and the elastomer.

[0028] The purpose of the present invention is to provide a wind power gearbox to improve the vibration reduction effect.

[0029] To achieve this object, the present invention adopts the following technical solutions:

[0030] A wind power gearbox comprises the above-mentioned cooler assembly. The wind power gearbox also comprises a box body and a bracket arranged on the box body, and the cooler assembly is arranged on the bracket.

[0031] Beneficial effects of the present invention:

[0032] A cooler assembly provided by the present invention simplifies the structure of a wind turbine gearbox into a mechanical model, wherein the box body plays the role of a mass block of a vibration source, and the bracket plays the role of a spring and a damper; the cooler body plays the role of a mass block of a dynamic vibration absorber, and the spring damping assembly plays the role of a spring and a damper; the present invention is based on the theory of dynamic vibration absorbers and combines the existing structural characteristics of the cooler assembly. It does not require additional mass components of the dynamic vibration absorber, utilizes the mass of the existing cooler body, and simplifies the structure; according to the vibration frequency generated by different vibration devices and the mass of the cooler body, the stiffness of the spring damping assembly is adjusted to match the optimal frequency ratio of the dynamic vibration absorber to optimize the vibration reduction effect. The structure is flexible and easy to install, and can meet the vibration reduction requirements of different models.

[0033] The wind power gearbox provided by the present invention improves the vibration reduction effect by adopting the above-mentioned cooler assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a partial structural schematic diagram of a wind power gearbox provided by a specific embodiment of the present invention;

[0035] Figure 2 Yes Yes Figure 1 A magnified image of point A;

[0036] Figure 3 is a working principle diagram of a cooler assembly provided by a specific embodiment of the present invention;

[0037] Figure 4 is a schematic structural diagram of an elastomer provided in a specific embodiment of the present invention;

[0038] Figure 5 is a cross-sectional view of an elastic body provided by a specific embodiment of the present invention;

[0039] Figure 6 is a structural schematic diagram of a spring damping assembly provided in a specific embodiment of the present invention;

[0040] Figure 7 is a cross-sectional view of a spring damping assembly provided by a specific embodiment of the present invention;

[0041] Figure 8 is a comparison diagram of the vibration velocity frequency response function of the cooler assembly in the first direction provided by a specific embodiment of the present invention;

[0042] Fig. 9 is a comparison diagram of the vibration velocity frequency response function of the cooler assembly in the second direction provided by a specific embodiment of the present invention;

[0043] Fig.10It is a comparison diagram of the vibration velocity frequency response function of the cooler assembly in the third direction provided by the specific embodiment of the present invention.

[0044] In the figure:

[0045] 101-box body; 102-bracket;

[0046] 1- Cooler body;

[0047] 2-first mounting plate; 21-third mounting hole;

[0048] 3-second mounting plate; 31-fourth mounting hole;

[0049] 4-spring damping assembly; 41-elastic body; 411-mounting hole; 412-mounting side wall; 42-first connecting member; 421-first side wall; 422-first end plate; 4221-first mounting hole; 43-second connecting member; 431-second side wall; 432-second end plate; 4321-second mounting hole. DETAILED DESCRIPTION

[0050] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0051] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0053] When the cooler assembly is mounted on the vibration device, the vibration device will vibrate, causing the cooler assembly mounted on the vibration device to swing. When the natural frequency of the cooler assembly as a whole is close to the excitation frequency of the vibration device, resonance will occur, which will damage the vibration device and the cooler assembly. The vibration device of this embodiment is exemplified by taking a wind turbine gearbox as an example.

[0054] like Figure 1 As shown, the wind turbine gearbox includes a box body 101 and a cooler assembly, the cooler assembly is connected to the box body 101, and the box body 101 is cooled by the cooler assembly. Specifically, the wind turbine gearbox includes a box body 101 and a bracket 102 arranged on the box body 101, and the cooler assembly is connected to the box body 101 through the bracket 102. When the wind turbine gearbox is running, vibration is generated inside the box body 101, and the vibration is transmitted to the cooler assembly through the bracket 102, causing the cooler assembly to swing laterally. When the natural frequency of the cooler assembly as a whole is close to the excitation frequency of the wind box gearbox, resonance will occur, which brings a higher risk of use to the wind turbine gearbox.

[0055] To solve the above problems, the cooler assembly provided in this embodiment includes a cooler body 1 and a spring damping assembly 4; Figure 2 As shown, specifically, an installation space is provided between the cooler body 1 and the vibration device; the spring damping assembly 4 is provided in the installation space and is respectively connected to the cooler body 1 and the vibration device, and the stiffness of the spring damping assembly 4 is adjusted according to the vibration frequency generated by the vibration device and the mass of the cooler body 1.

[0056] like Figure 3 As shown, the wind turbine gearbox structure is simplified into a mechanical model, wherein the box body 101 has a large stiffness, which is equivalent to the earth or fixed constraint in the mechanical model; the cooler assembly (except the remaining part of the cooler body 1) plays the role of the mass block M1 of the dynamic vibration absorber, which is the object to be damped; the bracket 102 plays the role of the spring K1 and the damping C1; the cooler body 1 plays the role of the mass block M2 of the dynamic vibration absorber, and the spring damping assembly 4 plays the role of the spring K2 and the damping C2; the present invention is based on the theory of dynamic vibration absorbers and combines the existing structural characteristics of the cooler assembly. It does not require additional dynamic vibration absorber mass components, utilizes the mass of the existing cooler body 1, and simplifies the structure; according to the vibration frequency generated by different vibration devices and the mass of the cooler body 1, the stiffness of the spring damping assembly 4 is adjusted to match the optimal frequency ratio of the dynamic vibration absorber to optimize the vibration reduction effect. The structure is flexible and easy to install, and it can meet the vibration reduction requirements of different models.

[0057] Specifically, the spring damping component 4 includes an elastic body 41, and the cooler assembly also includes a first mounting plate 2 and a second mounting plate 3, wherein the first mounting plate 2 is connected to the vibration device; the second mounting plate 3 is connected to the cooler body 1, and an installation space is formed between the second mounting plate 3 and the first mounting plate 2; the elastic body 41 is connected to the first mounting plate 2 and the second mounting plate 3 respectively; the structure is simple and easy to install; the material, structure and size of the elastic body 41 are set according to the vibration reduction requirements to obtain the corresponding stiffness parameters, and further, the elasticity can be determined by calculation of relevant empirical formulas or experiments, thereby improving the design accuracy. In this embodiment, the first mounting plate 2 is connected to the bracket 102, the cooler body 1 is a heat dissipation fin, and the second mounting plate 3 is connected to the heat dissipation fin.

[0058] In this embodiment, Figure 4 and Figure 5 As shown, the elastic body 41 is a rotating body, and the rotating body includes a rotating surface and an axis of the rotating body, wherein the rotating surface is a parallelogram, and the parallelogram includes a first side and a second side arranged opposite to the first side, and the length of the first side and the second side is H; the axis of the rotating body is parallel to the first side and the second side, and the distance between the axis of the rotating body and the first side is R1, and the distance between the axis of the rotating body and the second side is R2, wherein R2>R1. The elastic element stiffness calculation can be determined according to the following empirical formulas 1 and 2:

[0059]

[0060] K1=K2=(2~6)K3............(2)

[0061] Among them, G is the shear elastic modulus of the elastic element, K1, K2 and K3 are the stiffness coefficients of the elastic element in three directions of space, and H is the cross-sectional height of the elastic element.

[0062] The stiffness of the elastic body 41 can be calculated according to the above empirical formula, where G is the material parameter of the elastic body 41 itself, and H, R1 and R2 are conveniently obtained from the above structure, so it is convenient to calculate the stiffness coefficient of the elastic body 41. The elastic body 41 is designed as the above rotating body structure, which simplifies the calculation difficulty. The processing method of the elastic body 41 is not limited.

[0063] Since the elastic body 41 is made of a relatively soft material, it is not easy to be installed with the first mounting plate 2 and the second mounting plate 3, and it is easy to be worn during installation. Figure 6 and Figure 7As shown, optionally, the spring damping assembly 4 also includes a first connecting member 42 and a second connecting member 43, wherein the first connecting member 42 connects the elastomer 41 and the first mounting plate 2; the second connecting member 43 connects the elastomer 41 and the second mounting plate 3, so that the elastomer 41 is installed through the first connecting member 42 and the second connecting member 43 respectively, which improves the installation convenience, improves the structural strength of the elastomer 41, and improves the installation stability.

[0064] Specifically, the first edge rotates around the axis of the rotating body to form an installation inner hole 411, and the first connecting member 42 is inserted into the installation inner hole 411. The first connecting member 42 includes a first side wall 421 and a first end plate 422. The first side wall 421 is connected to the installation inner hole 411; the first end plate 422 is arranged at the end of the first side wall 421, and the first end plate 422 is connected to the first mounting plate 2; the first connecting member 42 is arranged in the installation inner hole 411, which reduces the installation space occupied by the first connecting member 42 and improves the compactness of the structure; the first side wall 421 improves the structural strength of the installation inner hole 411.

[0065] Specifically, a vulcanized adhesive layer is provided between the first connecting member 42 and the elastomer 41, and the bonding is more firmly achieved through the vulcanized adhesive layer. In this embodiment, the elastomer 41 is a rubber body, and the first connecting member 42 is a metal plate. The vulcanized rubber is bonded to the metal, which can combine the high elasticity of the rubber with the high strength of the metal, thereby obtaining better strength and durability, and having functions such as shock absorption and wear resistance. More specifically, the first side wall 421 is cylindrical, and the first connecting member 42 is inserted into the mounting inner hole 411, thereby increasing the connection area between the first side wall 421 and the mounting inner hole 411, and increasing the connection strength. In other embodiments, the spring damping assembly 4 can also be a rubber air spring or a hydraulic rubber spring, etc., which can be selected based on the installation space and cost, etc., and is not limited here.

[0066] Specifically, the first connecting member 42 is detachably connected to the first mounting plate 2 via a fastener. Specifically, a first mounting hole 4221 is provided on the first end plate 422, and a third mounting hole 21 is provided on the first mounting plate 2. The first end plate 422 and the first mounting plate 2 are detachably connected via a fastener that penetrates the first mounting hole 4221 and the third mounting hole 21, so as to facilitate assembly and disassembly. Further specifically, the first end plate 422 is a circular plate, the first side wall 421 is arranged around the first end plate 422, and a first mounting hole is provided at the center of the first end plate 422 for connection with the first mounting plate 2. In this embodiment, the second side rotates around the axis of the rotating body to form an installation side wall 412, and the second connecting member 43 is sleeved on the installation side wall 412. The second connecting member 43 includes a second side wall 431 and a second end plate 432, wherein the second side wall 431 is connected to the installation side wall 412; the second end plate 432 is arranged at the end of the second side wall 431, and the second end plate 432 is connected to the second installation plate 3; the second side wall 431 improves the structural strength of the installation side wall 412, reduces the installation space occupied by the second connecting member 43, and improves the compactness of the structure.

[0067] Specifically, a vulcanized adhesive layer is provided between the second connecting member 43 and the elastomer 41, and the bonding through vulcanization is more firm. In this embodiment, the elastomer 41 is a rubber body, and the second connecting member 43 is a metal plate. The vulcanized rubber is bonded to the metal, which can combine the high elasticity of the rubber with the high strength of the metal, thereby obtaining better strength and durability, and having functions such as shock absorption and wear resistance. Further specifically, the second side wall 431 is cylindrical, and the second connecting member 43 is sleeved on the mounting side wall 412, which increases the connection area between the second side wall 431 and the mounting side wall 412, and improves the connection strength.

[0068] Specifically, the second connecting member 43 is detachably connected to the second mounting plate 3 via a fastener. Specifically, a second mounting hole 4321 is provided on the second end plate 432, and a fourth mounting hole 31 is provided on the second mounting plate 3. The second end plate 432 and the second mounting plate 3 are detachably connected via a fastener penetrating the second mounting hole 4321 and the fourth mounting hole 31, so as to facilitate assembly and disassembly. Further specifically, the second end plate 432 is an annular plate, which is arranged on the outer periphery of the second side wall 431, and a plurality of second mounting holes 4321 are evenly provided on the second end plate 432, so as to improve the connection strength.

[0069] Optionally, the first connecting member 42 and the second connecting member 43 are both integrally formed structures.

[0070] The wind turbine gearbox provided in this embodiment adopts the above-mentioned cooler assembly. The high-speed frequency of the wind turbine gearbox at rated speed is about 22Hz, which is close to the first-order lateral swing natural frequency of the cooler assembly as a whole and produces resonance. According to the principle of dynamic vibration absorber and the above-mentioned empirical formula, the material and size of the rubber body are determined. The frequency response calculation results are as follows: Figure 8-Figure 10 As shown in the figure, it is the vibration frequency of the cooler assembly in three directions of space, where the horizontal axis represents the frequency (Hz) and the vertical axis represents the vibration velocity (mm / s), which means the vibration response of the cooler assembly under the unit force of 1N. The solid line in the figure is the vibration frequency of the cooler assembly when the spring damping component 4 is not used, and the dotted line in the figure is the vibration frequency of the cooler assembly when the spring damping component 4 is used; it can be seen from the figure that the resonance peak value of the vibration velocity frequency response function of the cooler assembly after adding the spring damping component 4 is significantly reduced, indicating that the dynamic vibration absorber has a significant vibration reduction effect. In addition, if the actual damping effect of the rubber body is considered, the peak value of the vibration velocity frequency response function is expected to be further reduced.

[0071] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A cooler assembly, used on a vibration device, characterized in that: The cooler assembly comprises: A cooler body (1) is provided with an installation space between it and the vibration device; A spring damping assembly (4) is arranged in the installation space and is respectively connected to the cooler body (1) and the vibration device, and the stiffness of the spring damping assembly (4) is adjusted according to the vibration frequency generated by the vibration device and the mass of the cooler body (1); The spring damping assembly (4) comprises an elastic body (41), and the cooler assembly further comprises: A first mounting plate (2) connected to the vibration device; A second mounting plate (3) connected to the cooler body (1), wherein the mounting space is formed between the second mounting plate (3) and the first mounting plate (2); The elastic body (41) is connected to the first mounting plate (2) and the second mounting plate (3) respectively; The spring damping assembly (4) further comprises: A first connecting member (42) connecting the elastic body (41) and the first mounting plate (2); A second connecting member (43) connecting the elastic body (41) and the second mounting plate (3); The elastic body (41) is installed respectively through the first connecting piece (42) and the second connecting piece (43), thereby improving installation convenience, increasing the structural strength of the elastic body (41), and improving installation stability.

2. The cooler assembly according to claim 1, characterized in that: The elastic body (41) is a rotating body, and the rotating body comprises: A rotation plane, which is in the shape of a parallelogram, wherein the parallelogram includes a first side and a second side arranged opposite to the first side; The axis of the rotating body is parallel to the first side and the second side. The distance between the axis of the rotating body and the first side is R1, and the distance between the axis of the rotating body and the second side is R2, wherein R2>R1.

3. The cooler assembly according to claim 2, characterized in that: The first side rotates around the axis of the rotating body to form an installation inner hole (411), and the first connecting member (42) is inserted into the installation inner hole (411). The first connecting member (42) includes: A first side wall (421) connected to the mounting inner hole (411); A first end plate (422) is arranged at an end of the first side wall (421), and the first end plate (422) is connected to the first mounting plate (2).

4. The cooler assembly according to claim 2, characterized in that: The second side rotates around the axis of the rotating body to form a mounting side wall (412), and the second connecting member (43) is sleeved on the mounting side wall (412). The second connecting member (43) includes: A second side wall (431) connected to the mounting side wall (412); A second end plate (432) is arranged at an end of the second side wall (431), and the second end plate (432) is connected to the second mounting plate (3).

5. The cooler assembly according to any one of claims 1 to 4, characterized in that: The elastic body (41) is a rubber body, and the first connecting member (42) and the second connecting member (43) are both metal plates.

6. The cooler assembly according to any one of claims 1 to 4, characterized in that: The first connecting member (42) is detachably connected to the first mounting plate (2) via a fastener, and the second connecting member (43) is detachably connected to the second mounting plate (3) via a fastener.

7. The cooler assembly according to any one of claims 1 to 4, characterized in that: A vulcanized adhesive layer is provided between the first connecting member (42) and the elastomer (41), and a vulcanized adhesive layer is provided between the second connecting member (43) and the elastomer (41).

8. A wind power gearbox, characterized in that: Comprising the cooler assembly according to any one of claims 1 to 7, the wind turbine gearbox further comprises a box body (101) and a bracket (102) arranged on the box body (101), and the cooler assembly is arranged on the bracket (102).

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