End face sealing structure and turbine machinery

Abstract

The present invention discloses an end face sealing structure and a turbine machinery, belonging to the field of turbine machinery, an end face sealing structure comprises: a rotor, a first groove and a plurality of second grooves that are interconnected are provided in the rotor, a convex portion is provided between adjacent second grooves, and the convex portion is connected to the rotor; a plurality of stationary blades, one end of the stationary blade is located in the first groove; a plurality of sealing teeth, one end of the sealing tooth is plugged into one end of the stationary blade, the sealing tooth extends along the axial direction of the rotor, and the other end of the sealing tooth is arranged corresponding to the second groove; a gap is formed between the convex portion and the other end of the sealing tooth. The technical effect of the present invention is that it is not only convenient to reduce the cross-coupling stiffness of the fluid in the gap, but also convenient to ensure good sealing performance under the premise of preventing collision and wear.

Description

Technical Field

[0001] The present invention relates to a turbine machinery, and in particular to an end face sealing structure and a turbine machinery. Background Art

[0002] Turbine machinery is a type of power fluid machinery with blades. Its core feature is that the rotor equipped with blades rotates at high speed, and energy conversion is achieved through the interaction generated when the fluid (gas or liquid) flows through the blades. It includes axial flow compressors, axial flow expanders, etc.

[0003] In order to increase the sealing performance, sealing teeth are generally provided on the stator blades of the relevant turbine machinery. However, the relevant sealing teeth are likely to cause the cross-coupling stiffness of the fluid in the gap to be larger, thereby generating a larger radial force on the rotor, which in turn leads to poor rotational stability of the rotor. At the same time, in order to prevent collision and wear, the gap of the relevant turbine machinery is generally larger, which is likely to lead to poor sealing performance. Summary of the invention

[0004] Purpose of the invention: The purpose of the present invention is to provide an end face sealing structure, which is not only convenient for reducing the cross-coupling stiffness of the fluid in the gap, but also convenient for ensuring good sealing while preventing collision and wear; another purpose of the present invention is to provide a turbine machinery.

[0005] Technical solution:

[0006] An end face sealing structure, comprising:

[0007] A rotor, wherein a first groove and a plurality of second grooves that are interconnected are provided in the rotor, a convex portion is provided between adjacent second grooves, and the convex portion is connected to the rotor;

[0008] a plurality of stationary blades, one end of each stationary blade being located in the first slot;

[0009] a plurality of sealing teeth, one end of each of the sealing teeth being plugged into one end of each of the stationary blades, each of the sealing teeth extending in the axial direction of the rotor, and the other end of each of the sealing teeth being arranged correspondingly to the second groove;

[0010] A gap is formed between the protrusion and the other end of the sealing tooth.

[0011] Optionally, along the direction from the stator blade to the rotor, the distance between the other end of the sealing tooth and the radial center line of the stator blade gradually decreases, and the distance between the bottom wall of the second groove and the radial center line of the stator blade gradually decreases.

[0012] Optionally, the plurality of stationary blades are configured as a plurality of first stationary blades and a plurality of second stationary blades, the plurality of the first stationary blades are connected to form a first stationary blade grid, the plurality of the second stationary blades are connected to form a second stationary blade grid, and the first stationary blade grid and the second stationary blade grid conflict with each other.

[0013] Optionally, the plurality of sealing teeth are configured as a plurality of first sealing teeth and a plurality of second sealing teeth, one end of the first sealing tooth is plugged into one side of one end of the stationary blade, and one end of the second sealing tooth is plugged into the other side of one end of the stationary blade.

[0014] Optionally, the first sealing teeth and the second sealing teeth are axially symmetrically distributed about one end of the stationary blade.

[0015] Optionally, the stationary blade includes:

[0016] Leaf body;

[0017] A leaf root and a leaf crown respectively connected to two ends of the leaf body;

[0018] The leaf crown is located in the first groove, and one end of the sealing tooth is plugged into the leaf crown.

[0019] Optionally, the connection between the blade body, the blade root and the blade crown is an integrally formed connection.

[0020] Optionally, the sealing teeth are made of aluminum alloy.

[0021] Optionally, the thickness of the sealing teeth is in the range of 0.4-0.6 mm.

[0022] A turbine machine includes an end face sealing structure, and further includes:

[0023] A first shell and a second shell are clamped to each other, and the other end of the stationary blade is clamped to the first shell or the second shell;

[0024] A plurality of moving blades are connected to the rotor, wherein the moving blades and the stationary blades are arranged alternately.

[0025] Beneficial effects:

[0026] (1) The sealing teeth are used to increase the sealing performance, so as to ensure the efficiency of the related turbine machinery. Since one end of the sealing teeth is plugged into one end of the stationary blade, it is convenient to replace and maintain the sealing teeth in time. Since the sealing teeth extend along the axial direction of the rotor, it is convenient to make the extension direction of the sealing teeth consistent with the flow direction of the fluid, effectively reducing the impact of the fluid on the sealing teeth, thereby facilitating the reduction of the cross-coupling stiffness of the fluid in the gap, thereby preventing a large radial force from being generated on the rotor, and ensuring good rotation stability of the rotor;

[0027] (2) For the relevant sealing structure, the gap generally refers to the distance between the other end of the sealing tooth and the bottom wall of the second groove, while for the end face sealing structure of this embodiment, the gap refers to the distance between the protrusion and the other end of the sealing tooth, which is convenient for effectively reducing the gap and ensuring good sealing performance. In addition, due to the existence of the second groove, the other end of the sealing tooth and the rotor will not easily rub against each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is an overall diagram of an end face sealing structure of embodiment 1 of the present invention;

[0029] Figure 2 This is one of the partial views of an end face sealing structure of Example 1 of the present invention;

[0030] Figure 3 This is a second partial view of an end face sealing structure of Example 1 of the present invention;

[0031] Figure 4 This is a third partial view of an end face sealing structure of Example 1 of the present invention;

[0032] Figure 5 This is a fourth partial view of an end face sealing structure of Example 1 of the present invention;

[0033] Figure 6 This is a fifth partial view of an end face sealing structure of Example 1 of the present invention;

[0034] In the figure: 1, rotor; 11, first slot; 12, second slot; 13, raised portion; 2, stationary blade; 21, blade body; 22, blade root; 23, blade crown; 201, first stationary blade grid; 202, second stationary blade grid; 3, sealing tooth; 4, gap; 5, moving blade; 6, radial center line. DETAILED DESCRIPTION

[0035] In order to make the technical solution of the present invention clearer, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] Example 1

[0037] like Figure 6 The present embodiment provides an end face sealing structure, including: a rotor 1, wherein a first groove 11 and a plurality of second grooves 12 are interconnected, wherein a protrusion 13 is provided between adjacent second grooves 12, and the protrusion 13 is connected to the rotor 1; a plurality of stationary blades 2, wherein one end of the stationary blade 2 is located in the first groove 11; a plurality of sealing teeth 3, wherein one end of the sealing tooth 3 is plugged into one end of the stationary blade 2, the sealing tooth 3 extends along the axial direction of the rotor 1, and the other end of the sealing tooth 3 is correspondingly arranged to the second groove 12; and a gap 4 is formed between the protrusion 13 and the other end of the sealing tooth 3.

[0038] Specifically, the rotor 1 is used to carry a plurality of moving blades 5; the stationary blades 2 cooperate with the moving blades 5 to facilitate the energy conversion of the related turbine machinery; the first groove 11 is used to accommodate one end of the stationary blade 2 to prevent the one end of the stationary blade 2 and the rotor 1 from interfering with each other; the second groove 12 is used to accommodate the other end of the sealing tooth 3 to prevent the other end of the sealing tooth 3 and the rotor 1 from interfering with each other; the sealing tooth 3 is used to increase the sealing performance to ensure the efficiency of the related turbine machinery. Since one end of the sealing tooth 3 is plugged into one end of the stationary blade 2, it is convenient to replace and maintain the sealing tooth 3 in time. Since the sealing tooth 3 extends along the axial direction of the rotor 1, it is convenient to make the extension direction of the sealing tooth 3 consistent with the flow direction of the fluid, which effectively reduces The impact of the fluid on the sealing tooth 3 makes it easy to reduce the cross-coupling stiffness of the fluid in the gap 4, thereby preventing a large radial force from being generated on the rotor 1, and ensuring the good rotation stability of the rotor 1. The material of the sealing tooth 3 can be aluminum alloy, copper alloy, etc.; for the relevant sealing structure, the gap 4 generally refers to the distance between the other end of the sealing tooth 3 and the bottom wall of the second groove 12, and for the end face sealing structure of this embodiment, the gap 4 refers to the distance between the protrusion 13 and the other end of the sealing tooth 3, which is convenient for effectively reducing the gap 4 and ensuring good sealing. In addition, due to the existence of the second groove 12, the other end of the sealing tooth 3 and the rotor 1 will not easily collide and rub.

[0039] Further, such as Figure 6 Along the direction from the stationary blade 2 to the rotor 1, the distance between the other end of the sealing tooth 3 and the radial center line 6 of the stationary blade 2 gradually decreases, and the distance between the bottom wall of the second groove 12 and the radial center line 6 of the stationary blade 2 gradually decreases.

[0040] Specifically, it is equivalent to setting one end of the stationary blade 2, a plurality of sealing teeth 3 and a plurality of second grooves 12 into an inverted trapezoid, so as to reduce the space occupied by one end of the stationary blade 2, a plurality of sealing teeth 3 and a plurality of second grooves 12 in the rotor 1, thereby facilitating to reduce the interference with the moving blade 5 adjacent to the stationary blade 2, and ensuring the structural strength of the moving blade 5 adjacent to the stationary blade 2.

[0041] Among them, the spacing between the other end of the sealing tooth 3 and the radial center line 6 of the stationary blade 2 gradually decreases, which can be achieved in a variety of ways. For example, in way one, the width of the sealing tooth 3 and the depth of one end of the sealing tooth 3 inserted into one end of the stationary blade 2 remain unchanged, while the width of one end of the stationary blade 2 gradually decreases; in way two, the width of the sealing tooth 3 and the width of one end of the stationary blade 2 remain unchanged, while the depth of one end of the sealing tooth 3 inserted into one end of the stationary blade 2 gradually increases; in way three, the depth of one end of the sealing tooth 3 inserted into one end of the stationary blade 2 and the width of one end of the stationary blade 2 remain unchanged, while the width of the sealing tooth 3 gradually decreases.

[0042] Further, such as Figure 1-Figure 5, the plurality of stationary blades 2 are configured as a plurality of first stationary blades and a plurality of second stationary blades, the plurality of first stationary blades are connected to form a first stationary blade cascade 201, the plurality of second stationary blades are connected to form a second stationary blade cascade 202, and the first stationary blade cascade 201 and the second stationary blade cascade 202 conflict with each other. Specifically, the first stationary blade cascade 201 and the second stationary blade cascade 202 facilitate the integration of the plurality of stationary blades 2 and divide them into two halves, which is convenient for reducing the cumulative error caused by the processing and installation of a single independent stationary blade 2, and is convenient for increasing the overall rigidity of the plurality of stationary blades 2, thereby ensuring good structural stability.

[0043] Further, such as Figure 6 , the plurality of sealing teeth 3 are configured as a plurality of first sealing teeth and a plurality of second sealing teeth, one end of the first sealing tooth is plugged into one side of one end of the stationary blade 2, and one end of the second sealing tooth is plugged into the other side of one end of the stationary blade 2. Specifically, it is equivalent to arranging a plurality of sealing teeth 3 on both sides of one end of the stationary blade 2, so as to form a multi-channel sealing structure on both sides of one end of the stationary blade 2, thereby ensuring good sealing performance, wherein the number of the first sealing teeth and the second sealing teeth is not limited, and can be four, five, etc.

[0044] Further, such as Figure 6 The first sealing teeth and the second sealing teeth are axially symmetrically distributed about one end of the stationary blade 2. Specifically, the axially symmetrical distribution is convenient for increasing the force symmetry of one end of the stationary blade 2 and the sealing symmetry of the first sealing teeth and the second sealing teeth.

[0045] Further, such as Figure 6 The stationary blade 2 includes: a blade body 21; a blade root 22 and a blade crown 23 respectively connected to both ends of the blade body 21; wherein the blade crown 23 is located in the first groove 11, and one end of the sealing tooth 3 is plugged into the blade crown 23. Specifically, the blade body 21 is used to carry the blade root 22 and the blade crown 23; the blade root 22 is used to be clamped with the first housing or the second housing of the relevant turbine machinery; and the blade crown 23 is used to carry one end of the sealing tooth 3.

[0046] Further, such as Figure 6 The connection between the blade body 21, the blade root 22 and the blade crown 23 is an integral molding connection. Specifically, the integral molding connection facilitates increasing the integrity of the blade body 21, the blade root 22 and the blade crown 23.

[0047] Further, such as Figure 6 The material of the sealing teeth 3 is aluminum alloy. Specifically, the aluminum alloy makes it easy to make the hardness of the sealing teeth 3 low, and even if the sealing teeth 3 and the rotor 1 collide and rub, the damage degree of the rotor 1 can be minimized.

[0048] Further, such as Figure 6The thickness of the sealing teeth 3 is in the range of 0.4-0.6 mm. Specifically, the thickness of the sealing teeth 3 can be 0.4 mm, 0.5 mm or 0.6 mm. If the thickness of the sealing teeth 3 is too small, the sealing teeth 3 may be bent. If the thickness of the sealing teeth 3 is too large, the sealing teeth 3 may collide with the rotor 1, causing great damage to the rotor 1.

[0049] The present embodiment also provides a turbine machinery, including an end face sealing structure of the present embodiment, and also including: a first shell and a second shell that are clamped to each other, the other end of the stationary blade 2 is clamped to the first shell or the second shell; a plurality of moving blades 5 connected to the rotor 1, and the moving blades 5 and the stationary blades 2 are arranged alternately.

[0050] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. An end face sealing structure, characterized in that: include: A rotor (1), wherein a first groove (11) and a plurality of second grooves (12) which are interconnected are provided in the rotor (1), a protrusion (13) is provided between adjacent second grooves (12), and the protrusion (13) is connected to the rotor (1); a plurality of stationary blades (2), one end of each stationary blade (2) being located in the first groove (11); a plurality of sealing teeth (3), one end of each of the sealing teeth (3) being plugged into one end of each of the stationary blades (2), each of the sealing teeth (3) extending in the axial direction of the rotor (1), and the other end of each of the sealing teeth (3) being arranged correspondingly to the second groove (12); A gap (4) is formed between the protruding portion (13) and the other end of the sealing tooth (3).

2. An end face sealing structure according to claim 1, characterized in that: Along the direction from the stationary blade (2) to the rotor (1), the distance between the other end of the sealing tooth (3) and the radial center line (6) of the stationary blade (2) gradually decreases, and the distance between the bottom wall of the second groove (12) and the radial center line (6) of the stationary blade (2) gradually decreases.

3. The end face sealing structure according to claim 1, characterized in that: The plurality of stationary blades (2) are configured as a plurality of first stationary blades and a plurality of second stationary blades, the plurality of first stationary blades are connected to form a first stationary blade grid (201), the plurality of second stationary blades are connected to form a second stationary blade grid (202), and the first stationary blade grid (201) and the second stationary blade grid (202) are in conflict with each other.

4. An end face sealing structure according to any one of claims 1 to 3, characterized in that: The plurality of sealing teeth (3) are configured as a plurality of first sealing teeth and a plurality of second sealing teeth, one end of the first sealing tooth being plugged into one side of one end of the stationary blade (2), and one end of the second sealing tooth being plugged into the other side of one end of the stationary blade (2).

5. An end face sealing structure according to claim 4, characterized in that: The first sealing teeth and the second sealing teeth are axially symmetrically distributed about one end of the stationary blade (2).

6. An end face sealing structure according to any one of claims 1 to 3, characterized in that: The stationary blade (2) comprises: Leaf body (21); A blade root (22) and a blade crown (23) respectively connected to two ends of the blade body (21); The blade crown (23) is located in the first groove (11), and one end of the sealing tooth (3) is plugged into the blade crown (23).

7. An end face sealing structure according to claim 6, characterized in that: The connection between the blade body (21), the blade root (22) and the blade crown (23) is an integrally formed connection.

8. An end face sealing structure according to any one of claims 1 to 3, characterized in that: The material of the sealing teeth (3) is aluminum alloy.

9. An end face sealing structure according to any one of claims 1 to 3, characterized in that: The thickness of the sealing teeth (3) is in the range of 0.4-0.6 mm.

10. A turbomachinery, characterized in that: The end face sealing structure comprises the end face sealing structure according to any one of claims 1 to 9, further comprising: A first shell and a second shell that are clamped to each other, the other end of the stationary blade (2) being clamped to the first shell or the second shell; A plurality of moving blades (5) are connected to the rotor (1), wherein the moving blades (5) and the stationary blades (2) are arranged alternately.

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