A dust collecting brake

Abstract

The application provides a dust collecting brake, which comprises a vertical outer shell, a first installation cavity and a second installation cavity coaxially arranged in the outer shell and communicated with each other, a first piston and a second piston slidably arranged in the first installation cavity and the second installation cavity respectively, the first piston and the second piston being fixedly connected and the second piston extending out of the outer shell, a brake assembly arranged outside the outer shell, a top head fixedly connected to an end face of the second piston outside the outer shell, the brake assembly being arranged opposite to the top head, a dust collecting cylinder arranged around the outer shell, the upper end of the dust collecting cylinder being fixedly connected to the brake assembly, the lower end of the dust collecting cylinder being fixedly connected to the outer shell, the middle section of the dust collecting cylinder being of an expansion structure, a gap being left between the upper end of the dust collecting cylinder and the brake assembly, and a communicating pipe fixedly connected to the dust collecting cylinder and communicated with the interior of the dust collecting cylinder. The application can reduce the maintenance frequency.

Description

Technical Field

[0001] This invention relates to the field of generator set braking technology, and more particularly to a dust collection braking brake. Background Technology

[0002] Braking during the shutdown process of a hydro-generator can effectively reduce downtime, reduce the time the unit spends below rated speed, reduce bearing wear, and reduce overheating and bearing failure caused by friction at low speeds.

[0003] The brake is similar to a car brake, with the brake plate made of metal. Because the turbine generator set starts and stops frequently, the brake is also used frequently. After frequent use, the brake plate will rub against the generator rotor, generating a lot of dust. Since the brake and rotor are in the same space, the dust will affect the windings and other components, and in severe cases, it can cause a short circuit. Regular dust removal is necessary, thus increasing the frequency of equipment maintenance. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a dust-collecting brake, which solves the problem of increased equipment maintenance frequency due to dust in existing technologies.

[0005] According to an embodiment of the present invention, a dust collection brake includes a vertically arranged outer shell, a first mounting cavity and a second mounting cavity coaxially arranged and connected within the outer shell, a first piston and a second piston slidably disposed within the first mounting cavity and the second mounting cavity respectively, the first piston and the second piston being fixedly connected, and the second piston extending outside the outer shell; a braking assembly is also disposed outside the outer shell, a top head is fixedly connected to the end face of the second piston located outside the outer shell, and the braking assembly abuts against the top head; a dust collection cylinder is also arranged around the outer shell, the upper end of the dust collection cylinder is fixedly connected to the braking assembly, the lower end of the dust collection cylinder is fixedly connected to the outer shell, the middle section of the dust collection cylinder is a telescopic structure, a gap is left between the upper end of the dust collection cylinder and the braking assembly, and a connecting pipe communicating with the interior of the dust collection cylinder is also fixedly connected to the dust collection cylinder.

[0006] In the above embodiments, the connecting pipe is used to connect to the external exhaust fan. The operation of the exhaust fan creates a negative pressure inside the dust collection cylinder, which allows the generated dust to be sucked into the dust collection cylinder, avoiding the dust from causing adverse effects on the wire coils, etc. Therefore, it can extend the maintenance interval time and solve the problem of increased equipment maintenance frequency due to dust in the prior art.

[0007] Furthermore, the dust collection cylinder includes a first connecting ring and a second connecting ring, a folding ring is fixedly connected between the first connecting ring and the second connecting ring, the first connecting ring is fixedly connected to the braking assembly, and the second connecting ring is fixedly connected to the outer shell through an annular plate.

[0008] Furthermore, the annular plate is provided with a plurality of connection holes, and each connection hole can be detachably connected to a dust collection rod, the dust collection rod including an adsorption section located inside the dust collection cylinder.

[0009] Furthermore, the dust collecting rod also includes a connecting section fixedly connected to the adsorption section, and the connecting section is threadedly connected to the connecting hole.

[0010] Furthermore, the connecting pipe is fixedly connected to the second connecting ring and communicates with its interior.

[0011] Furthermore, the braking assembly includes a brake ring and a gate plate fixedly connected to the brake ring. The gate plate is also fixedly connected to a top plate, and the top plate abuts against the top head.

[0012] Furthermore, the gate plate and the first connecting ring are fixedly connected by several connecting rods.

[0013] Furthermore, the top plate is also recessed with a top groove, and the side of the top head facing away from the second piston is a spherical surface, with the spherical surface partially incorporated into the top groove.

[0014] Furthermore, the inner diameter of the first mounting cavity is smaller than the inner diameter of the second mounting cavity, and a support ring platform is provided between the first mounting cavity and the second mounting cavity. The first piston and the second piston are in sliding contact with the inner wall of the first mounting cavity and the inner wall of the second mounting cavity, respectively.

[0015] Furthermore, a guide groove is recessed on the inner wall of the second mounting cavity and is arranged along its axial direction. A guide key is fixedly connected to the second piston and the guide key is in sliding contact with the guide groove.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] By fixing a dust collection cylinder to the outside of the casing, the generated dust is drawn into the dust collection cylinder with the assistance of an external exhaust fan, thus avoiding the adverse effects of dust on components such as wire coils. This extends the maintenance interval, reduces the frequency of equipment maintenance, and solves the problem of increased equipment maintenance frequency due to dust in the prior art. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention;

[0019] In the above attached figures:

[0020] 1. Outer shell, 2. First piston, 3. Second piston, 4. Top head, 5. Dust collection cylinder, 6. Connecting pipe, 7. First connecting ring, 8. Second connecting ring, 9. Folding ring, 10. Dust collection rod, 11. Adsorption section, 12. Connecting section, 13. Braking ring, 14. Gate plate, 15. Top plate, 16. Connecting rod, 17. Top groove, 18. Guide key, 19. Annular plate. Detailed Implementation

[0021] The technical solutions of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0023] like Figure 1 As shown, this embodiment provides a dust collection brake, which includes a vertically arranged outer shell 1. A first mounting cavity and a second mounting cavity are coaxially arranged and connected within the outer shell 1. A first piston 2 and a second piston 3 are slidably arranged in the first and second mounting cavities, respectively. The first piston 2 and the second piston 3 are fixedly connected, and the second piston 3 extends outside the outer shell 1. A braking assembly is also provided outside the outer shell 1. A top head 4 is fixedly connected to the end face of the second piston 3 outside the outer shell 1, and the braking assembly abuts against the top head 4. A dust collection cylinder 5 is also arranged around the outer shell 1. The upper end of the dust collection cylinder 5 is fixedly connected to the braking assembly, and the lower end is fixedly connected to the outer shell 1. The middle section of the dust collection cylinder 5 is a telescopic structure. A gap is left between the upper end of the dust collection cylinder 5 and the braking assembly. A connecting pipe 6 communicating with the interior of the dust collection cylinder 5 is also fixedly connected to the dust collection cylinder 5.

[0024] In the above embodiment, the connecting pipe 6 is used to connect to the external exhaust fan. The operation of the exhaust fan creates a negative pressure inside the dust collection cylinder 5, which allows the generated dust to be sucked into the dust collection cylinder 5, avoiding adverse effects of dust on the coils, etc. Therefore, it can extend the maintenance interval and solve the problem of increased equipment maintenance frequency due to dust in the prior art. Specifically, in this embodiment, the gap between the braking component and the dust collection cylinder 5 is left for dust to enter. The braking component is used to achieve braking. Consistent with the prior art, the driving method in this embodiment is also hydraulic. That is, hydraulic pressure causes the first piston 2 and the second piston 3 to move back and forth, and then pushes the braking component to achieve braking and release of the rotor. The dust generated at the rotor can be sucked into the dust collection cylinder 5 in a short distance, thereby ensuring that the dust will not have an adverse effect on the braking component and the rotor. At the same time, the dust sucked into the dust collection cylinder 5 will not have an adverse effect on other components.

[0025] In this embodiment, the second piston 3 and the braking assembly are in contact through the top head 4, creating a gap between them. During braking, the braking assembly can adaptively undergo a certain rotational displacement (i.e., displacement in a non-vertical direction), preventing the second piston 3 from colliding with the braking assembly. Specifically, the dust collection cylinder 5 includes a first connecting ring 7 and a second connecting ring 8. The connecting pipe 6 is fixedly connected to and communicates with the second connecting ring 8. A folding ring 9 is fixedly connected between the first connecting ring 7 and the second connecting ring 8. The first connecting ring 7 is fixedly connected to the braking assembly, and the second connecting ring 8 is fixedly connected to the outer shell 1 through an annular plate 19. During operation, the braking assembly moves up or down, allowing the folding ring 9 to adaptably unfold and fold, thus keeping the first connecting ring 7 and the braking assembly relatively stationary and ensuring a relatively stable dust entry position, thereby maintaining a continuous and stable dust suction effect.

[0026] Preferably, the annular plate 19 is provided with a plurality of connecting holes, each of which can be detachably connected to a dust collecting rod 10. The dust collecting rod 10 includes an adsorption section 11 located inside the dust collecting cylinder 5. The dust sucked into the dust collecting cylinder 5 can be adsorbed by the dust collecting rod 10, thus making it more stable. Specifically, the adsorption section 11 includes a porous rod-shaped structure made of flexible material, such as a sponge column, which has the function of adsorbing dust and can also be cleaned after being disassembled with the dust collecting rod 10, and then reinstalled for normal use. Furthermore, in order to facilitate the disassembly of the dust collecting rod 10, the dust collecting rod 10 also includes a connecting section 12 fixedly connected to the adsorption section 11. The connecting section 12 is threadedly connected to the connecting hole, and the connecting section 12 is located outside the dust collecting cylinder 5, and can be rotated externally so that it can be pulled out smoothly. During the pulling out process, the flexible adsorption section 11 can bend adaptively and will not be unable to be pulled out due to the narrow space. Some dust may fall off due to bending, but it can be cleaned with tools such as blowing (specifically, corresponding blowing can be performed through the provided connecting hole).

[0027] Preferably, the braking assembly includes a brake ring 13 and a gate plate 14 fixedly connected to the brake ring 13. The gate plate 14 is also fixedly connected to a top plate 15, and the top plate 15 abuts against the top head 4. A gap is left between the top plate 15 and the second piston 3 due to the top head 4, so that the shaking during the braking process will not affect the main structure of the brake (when braking, the rotor contacts the gate plate 14 in the brake ring 13. If the rotor is lifted by the gate plate 14, it will inevitably be affected by the rotor, thereby causing the gate plate 14 to move in a non-vertical direction. The gap is used to isolate the displacement of the gate plate 14 from the second piston 3).

[0028] Furthermore, the gate plate 14 and the first connecting ring 7 are fixedly connected by a number of connecting rods 16. The connecting rods 16 enable the first connecting ring 7 to be connected to the gate plate 14. At the same time, the intervals between adjacent connecting rods 16 form gaps for dust to enter the dust collection cylinder 5, ensuring that the dust is smoothly sucked into the dust collection cylinder 5.

[0029] Furthermore, the top plate 15 is recessed with a top groove 17, and the side of the top head 4 facing away from the second piston 3 is a spherical surface, and the spherical surface is partially incorporated into the top groove 17. This ensures that the brake plate 14 can move in a non-vertical direction relative to the top head 4 during braking.

[0030] Preferably, the inner diameter of the first mounting cavity is smaller than the inner diameter of the second mounting cavity, and a support ring platform is provided between the first mounting cavity and the second mounting cavity. The first piston 2 and the second piston 3 slide in contact with the inner wall of the first mounting cavity and the inner wall of the second mounting cavity, respectively. The support ring platform provides a limit for the second piston 3, so that the second piston 3 cannot enter the first mounting cavity. That is, when the second piston 3 and the support ring platform abut against each other, the brake valve is in the initial position. As braking proceeds, the first piston 2 pushes the second piston 3 to move upward. Further, a guide groove is recessed on the inner wall of the second mounting cavity and is arranged along its axial direction. A guide key 18 is fixedly connected to the second piston 3 and the guide key 18 slides in contact with the guide groove. The guide key 18 can only slide in the guide groove, thereby ensuring that the second piston 3 and the first piston 2 will not rotate relative to the outer shell 1, thereby further avoiding the second piston 3 from moving in a non-vertical direction when the braking assembly is braking.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A dust collection brake, characterized in that, The device includes a vertically arranged outer shell, within which a first mounting cavity and a second mounting cavity are coaxially aligned and connected. A first piston and a second piston are slidably disposed within the first and second mounting cavities, respectively. The first and second pistons are fixedly connected, with the second piston extending outside the outer shell. A braking assembly is also disposed outside the outer shell, with a top head fixedly connected to the end face of the second piston outside the outer shell, and the braking assembly abutting against the top head. A dust collection cylinder is also arranged around the outer shell, with its upper end fixedly connected to the braking assembly and its lower end fixedly connected to the outer shell. The middle section of the dust collection cylinder is a telescopic joint. The structure includes a gap between the upper end of the dust collection cylinder and the braking assembly, and a connecting pipe fixedly connected to the dust collection cylinder, which communicates with the interior of the dust collection cylinder and is used to connect to an exhaust fan. The dust collection cylinder includes a first connecting ring and a second connecting ring, and a folding ring is fixedly connected between the first connecting ring and the second connecting ring. The first connecting ring is fixedly connected to the braking assembly, and the second connecting ring is fixedly connected to the outer shell through an annular plate. The braking assembly includes a braking ring and a gate plate fixedly connected to the braking ring. The gate plate is also fixedly connected to a top plate, and the top plate abuts against the top head. The gate plate is fixedly connected to the first connecting ring through several connecting rods.

2. The dust collection brake as described in claim 1, characterized in that, The annular plate is provided with a number of connection holes, and each connection hole can be detachably connected to a dust collection rod, the dust collection rod including an adsorption section located inside the dust collection cylinder.

3. The dust collection brake as described in claim 2, characterized in that, The dust collection rod also includes a connecting section that is fixedly connected to the adsorption section, and the connecting section is threadedly connected to the connecting hole.

4. The dust collection brake as described in claim 1, characterized in that, The connecting pipe is fixedly connected to the second connecting ring and communicates with its interior.

5. The dust collection brake as described in claim 1, characterized in that, The top plate is also recessed with a top groove, and the side of the top head facing away from the second piston is a spherical surface, with the spherical surface partially incorporated into the top groove.

6. The dust collection brake as described in claim 1, characterized in that, The inner diameter of the first mounting cavity is smaller than the inner diameter of the second mounting cavity, and a support ring platform is provided between the first mounting cavity and the second mounting cavity. The first piston and the second piston are in sliding contact with the inner wall of the first mounting cavity and the inner wall of the second mounting cavity, respectively.

7. The dust collection brake as described in claim 6, characterized in that, The inner wall of the second mounting cavity is recessed and has a guide groove arranged along its axial direction. A guide key is fixedly connected to the second piston and the guide key is in sliding contact with the guide groove.

Images