A new type of sealing structure

Abstract

The present invention provides a novel sealing structure, belonging to the field of motors. In the present invention, holes are drilled at designated positions on the sealing plate to install bearings, a handle is inserted in the middle of the bearings, the other end of the handle is fixed through a gear, an outer eaves of the sealing plate is provided on the periphery of the handle side of the sealing plate, a slideway is installed on the gear side of the sealing plate, when installing the sealing structure, the sector steel plate is retracted within the area of the sealing plate, after installation and positioning, the handle is rotated to drive the gear to rotate, the gear-rack kinematic pair converts the rotational motion into a linear motion, the sector steel plate is pushed out of the area of the sealing plate to a designated area through the linear motion of the rack in the slideway, and the sector steel plate, the motor end plate and the outer eaves of the sealing plate are fixed through bolts. The present invention greatly improves the sealing performance of large motors, and at the same time solves the single sealing form over a long time, so as to prevent the motor from being damaged after the outer sealing ring fails, and improves the reliable performance of the motor operation.

Description

Technical Field

[0001] The present invention relates to a novel sealing structure and belongs to the field of motors. Background Art

[0002] Since the motor is exposed to the air for a long time and comes into contact with a large amount of dust and water, once water enters the motor or dust gets in, it is very easy to damage the interior of the motor. Therefore, high requirements are imposed on the sealing performance of the motor. At present, the frames of relatively large motors are all welded from steel plates, and in many places, the sealing measure is to cover a sealing cover. There is a sealing gasket between the mating surfaces. Due to structural limitations, the sealing method of the motor is particularly single, and the sealing effect is not very satisfactory. Especially for positive-pressure enclosure type synchronous motors, air leakage will be more serious, resulting in the failure of the sealing structure. Summary of the Invention

[0003] The purpose of the present invention is to solve the problems existing in the above-mentioned prior art, and further provide a novel sealing structure.

[0004] The purpose of the present invention is achieved through the following technical solutions:

[0005] A novel sealing structure, the novel sealing structure includes a sealing plate, bearings, a handle, gears, a slideway, an outer eaves of the sealing plate, and a sector steel plate. Bearings are installed by drilling holes at designated positions on the sealing plate, and the bearings are fixedly installed on the sealing plate. A handle is inserted into the middle of the bearings, and the other end of the handle is fixed by a gear. An outer eaves of the sealing plate is provided on the periphery of the handle side of the sealing plate. A slideway is installed on the gear side of the sealing plate, and the guide rail of the slideway is fixedly welded to the sealing plate. The sector steel plate is fixed on the slide block of the slideway. A rack is fixed on the side of the slide block of the slideway, and the rack and the gear at the end of the handle form a gear-rack kinematic pair. Threaded holes are drilled in the sector steel plate; when installing the sealing structure, the sector steel plate is retracted within the area of the sealing plate. After installation and positioning, the handle is rotated to drive the gear to rotate. The gear-rack kinematic pair converts the rotational motion into a linear motion. Through the linear motion of the rack in the slideway, the sector steel plate is pushed out of the area of the sealing plate to a designated area. Sealing gaskets are respectively provided at the contact positions between the sector steel plate, the outer eaves of the sealing plate and the motor end plate, and the sector steel plate, the motor end plate and the outer eaves of the sealing plate are fixed by bolts.

[0006] For a novel sealing structure of the present invention, the designated positions for drilling holes on the sealing plate are 3 to 4, there are 3 to 4 gears and slideways provided on the sealing plate, there are 3 to 4 sector steel plates provided on the sealing plate, and the sealing plate is divided into 3 to 4 areas with the slideway as the axis.

[0007] For a novel sealing structure of the present invention, when the sector steel plate is retracted within the area of the sealing plate, the distance of each sector steel plate from the center of the circle of the sealing plate is different.

[0008] A new sealing structure of the present invention. When the sealing plate and the outer eaves of the sealing plate are fixed by lap welding, the size of the outer eaves of the sealing plate is the same as that of the sector steel plate. When the outer eaves of the sealing plate are machined by milling, the sealing plate and the outer eaves of the sealing plate are an integral structure.

[0009] A new sealing structure of the present invention. The sealing plate is a two-piece structure, that is, the sealing plate is divided into two parts with equal areas, and the two parts of the sealing plate are fixed by positioning pins and bolts. The positioning pins and bolts are arranged on the handle side of the sealing plate.

[0010] A new sealing structure of the present invention. The motor end plate and the outer eaves of the sealing plate are drilled with light holes, and the sector steel plate is drilled with threaded holes.

[0011] A new sealing structure of the present invention. A copper scale sealing ring is cast on the inner side of the middle of the sealing plate. The copper scale sealing ring is double-layered, and a set is arranged at each end of the notch in the middle of the sealing plate.

[0012] A new sealing structure of the present invention. The designated area is that the sector steel plate covers the connection between the motor end plate and the sealing plate, and the light holes of the motor end plate and the outer eaves of the sealing plate are aligned with the threaded holes of the sector steel plate.

[0013] A new sealing structure of the present invention greatly improves the sealing performance of large motors, and at the same time solves the long-term single sealing form, so as to prevent the motor from being damaged after the outer layer sealing fails, and improves the reliable performance of the motor operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is the front view of a new sealing structure of the present invention.

[0015] Figure 2 It is the rear view of a new sealing structure of the present invention.

[0016] Figure 3 It is the side view of a new sealing structure of the present invention.

[0017] Figure 4 It is the side view of the inner side of the sealing plate of a new sealing structure of the present invention.

[0018] Figure 5 It is the side view of the connection between the sealing plate and the motor end plate of the present invention.

[0019] Figure 6 It is the side view of the connection between the sealing plate and the motor end plate of the present invention.

[0020] Figure 7 It is the front view of the slideway of the present invention.

[0021] Figure 8 It is the top view of the slideway of the present invention.

[0022] Figure 9 This is a side view of the slideway of the present invention.

[0023] Figure 10 This is a schematic diagram of the connection structure between the slide block and the sector steel plate in the present invention.

[0024] Figure 11 This is a schematic diagram of the connection structure between the slide block and the sector steel plate in the present invention.

[0025] In the figure, the reference numerals are: 1 is a sealing plate; 2 is a gear; 3 is a slideway; 4 is a rack; 5 is a sector steel plate; 6 is a handle; 7 is a motor end plate; 8 is the outer eaves of the sealing plate; 9 is a positioning pin and a bolt; 10 is a copper ruler sealing ring; 11 is an oil-soaked felt; 3-1 is a guide rail; 3-2 is a slide block; 12 is a hinge; 13 is a spring. Specific embodiments

[0026] The following will further elaborate on the present invention in conjunction with the accompanying drawings: This embodiment is implemented on the premise of the technical solution of the present invention, and specific implementation manners are given, but the protection scope of the present invention is not limited to the following embodiments.

[0027] Embodiment 1: As Figures 1-9 shown, a novel sealing structure involved in this embodiment includes a sealing plate, a bearing, a handle, a gear, a slideway, the outer eaves of the sealing plate, and a sector steel plate. A bearing is installed by drilling holes at designated positions on the sealing plate, the bearing is fixedly installed on the sealing plate, a handle is inserted into the middle of the bearing, the other end of the handle is fixed by a gear, the outer eaves of the sealing plate are provided on the periphery of the handle side of the sealing plate, a slideway is installed on the gear side of the sealing plate, the guide rail of the slideway is fixedly welded to the sealing plate, the sector steel plate is fixed on the slide block of the slideway, a rack is fixed on the side of the slide block of the slideway, and the rack and the gear at the handle end form a gear-rack kinematic pair. Threaded holes are drilled in the sector steel plate; when installing the sealing structure, the sector steel plate is retracted into the area of the sealing plate, and after installation and positioning, the handle is rotated to drive the gear to rotate. The gear-rack kinematic pair converts the rotational motion into a linear motion, and the sector steel plate is pushed out of the area of the sealing plate to a designated area through the linear motion of the rack in the slideway. Sealing gaskets are respectively provided at the contact positions between the sector steel plate, the outer eaves of the sealing plate and the motor end plate, and the sector steel plate, the motor end plate and the outer eaves of the sealing plate are fixed by bolts.

[0028] The guide rail of the slideway is fixedly welded to the sealing plate. The sector steel plate is fixed to the slide block of the slideway. The sector steel plate is fixed to the outermost side of the slide block and is welded to the slide block. The side rack of the slide block of the slideway meshes with the gear at the other end of the handle. Shaking the handle drives the gear to rotate. Through the gear-rack transmission, while the slide block slides along the slide rail, it drives the sector steel plate to slide along the guide rail. When the sector steel plate can cover the gap between the sealing plate and the motor end cover, it reaches the designated position. At the designated position, the slideway is provided with a protrusion to play a limiting role. Both inside the slide block and on the guide rail are provided with protrusions for limiting. When the sector steel plate moves to the designated position, the protrusions inside the slide block and on the guide rail come into contact for limiting, as specifically shown in Figures 7-9 shown, so that the slideway cannot move forward any further. And drill threaded holes in the sector steel plate in advance, and paste sealing gaskets on the inner and outer surfaces of the inner surface of the motor end plate corresponding to the sector steel plate and the outer surface of the motor end plate corresponding to the outer eaves of the sealing cover in advance; make the light holes on the outer eaves of the sealing plate, the light holes on the motor end cover plate, and the threaded holes on the sector piece concentric. At this time, tightening the bolts can complete the sealing. Before installation, shake the handle in advance to make the sector steel plate within the coverage area of the sealing plate to ensure smooth installation. During the process of the gear-rack transmission enabling the sector steel plate to slide along the guide rail, the slide block always moves within the area of the sector steel plate. By controlling the length of the slide block and the position of the handle, it is ensured that the slide block always moves within the area of the sector steel plate during the movement.

[0029] The designated positions for punching holes on the sealing plate are 3 to 4. There are 3 to 4 gears and slideways on the sealing plate, and 3 to 4 sector steel plates are provided on the sealing plate. The sealing plate is divided into 3 to 4 regions with the slideway as the axis. The number of punching holes on the sealing plate depends on the actual situation. The number of punching holes is equal to the number of gears, slideways, and sector steel plates. The positions of the punching holes divide the sealing plate into several regions, and the areas between the regions can be equal or unequal. When 2 sector steel plates are used, due to the limitation of the radius length, the two sector steel plates cannot be completely retracted into the sealing plate area when the sector steel plates are retracted into the sealing plate area; when more than 4 sector steel plates are used, it will not affect the sealing structure, but due to multiple sector steel plates, multiple gears, handles, and slideways are required, and the structure is relatively complex. When the diameter of the sealing plate is particularly large, more than 4 sector steel plates can be used.

[0030] When the sector steel plates are retracted within the area of the sealing plate, the distance of each sector steel plate from the center of the sealing plate is different. When the sector steel plates are pushed outwards, they are pushed out in sequence from the sector steel plate farthest from the sealing plate to ensure that the sector steel plates can slide normally in their respective slideways without being affected by others. The sector steel plates can be unequal in division, so the sector steel plates can be completely retracted into the area of the sealing plate.

[0031] When the sealing plate and the outer eaves of the sealing plate are fixed by lap welding, the size of the outer eaves of the sealing plate is the same as that of the sector steel plate, asFigure 5 As shown; when the sealing plate is milled to form the outer eaves of the sealing plate, the sealing plate and the outer eaves of the sealing plate are an integral structure, such as Figure 6 shown. The outer eaves of the sealing plate and the sector steel plate are used to seal both sides of the motor end plate and the sealing plate. The outer eaves of the sealing plate have two structures, and both structures can play a sealing role.

[0032] The sealing plate is a two-piece structure, that is, the sealing plate is divided into two parts with equal areas. The two parts of the sealing plate are fixed by positioning pins and bolts, and the positioning pins and bolts are arranged on the handle side of the sealing plate. Dividing the sealing plate into a two-piece structure is convenient for sealing the motor, can avoid the motor shaft for easy installation, and is convenient for transportation and storage. By setting a connecting plate at the connection of the upper and lower ends of the sealing plate, drilling holes in the connecting plate, and passing positioning pins and bolts through the holes to fix the upper and lower parts of the sealing plate.

[0033] The motor end plate and the outer eaves of the sealing plate are drilled with clearance holes, and the sector steel plate is drilled with threaded holes. When installing the sealing structure on the motor end plate, both sides of the joint between the motor end plate and the sealing plate are sealed by the outer eaves of the sealing plate and the sector steel plate, and then fixed by bolts according to the aligned through holes.

[0034] A copper ruler sealing ring is cast on the inner side of the middle of the sealing plate. The copper ruler sealing ring is double-layered, and a set of double-layer sealing rings is arranged at each end of the center notch of the sealing plate. The motor shaft passes through the center notch of the sealing plate. Two sets of double-layer copper ruler sealing rings are fixed on the inner side of the center notch of the sealing plate by casting. The two sets of copper ruler sealing rings are respectively fixed at both ends of the center notch side of the sealing plate. An oil-impregnated felt is placed in the groove between the two sets of double-layer copper ruler sealing rings to play a role in blocking and sealing, such as Figure 4 shown.

[0035] The outer diameter of the sealing plate is smaller than the inner diameter of the motor end plate. The sealing gasket is pasted on the motor end plate, and the sealing gasket is made of chloroprene rubber. The sealing gasket is fixed at the contact positions of both sides of the motor end plate opening with the sector steel plate and the outer eaves of the sealing plate.

[0036] Embodiment 2: As Figures 1-3 shown, a novel sealing structure involved in this embodiment, and the specific installation method of the novel sealing structure is as follows:

[0037] 1) Paste the sealing gasket at the accurate positions on both sides of the motor end plate where the sealing cover is about to be installed to ensure the accurate installation of the sealing strip. And drill threaded holes at the accurate positions. (The drilling spacing is equal to the drilling spacing of the outer eaves of the sealing plate and the sector steel plate)

[0038] 2) Drive the gear to rotate by rotating the handle. The gear-rack kinematic pair converts the rotational motion into a linear motion. Through the linear motion of the rack in the slideway, ensure that the sector piece shrinks within the area of the sealing cover, that is, inside the main body of the sealing plate, to ensure smooth installation.

[0039] 3) Install the sealing plate precisely, aligning the threaded holes on the outer edge of the sealing plate with the threaded holes on the motor end plate.

[0040] 4) Unfold the sector steel plate by turning the handle until the sector steel plate moves to the specified position. Ensure that the reserved threaded holes of the sector plate, the through holes of the sealing plate, and the through holes of the motor steel plate are in the same position.

[0041] 5) Install and tighten the bolts to reach the specified pre-tightening force.

[0042] 6) Remove the handle and install an explosion-proof sealing plug at the handle position.

[0043] 7) Installation is completed.

[0044] Embodiment 3: As Figure 10 and 11 shown, a new sealing structure involved in this embodiment. In the new sealing structure, the sector steel plate and the slideway need to be fixedly connected, and they can be connected by a combination of a hinge and a spring. Figure 10 Fix the inner and outer pieces of the hinge on the connection surfaces of the sector steel plate and the slideway, and control the opening and closing angle between the sector steel plate and the slide by fixing an inclined spring between the two inner and outer pieces; Figure 11 Fix the inner and outer pieces of the hinge on the top of the sector steel plate and the slideway, and fix an inclined spring on the contact surface between the sector steel plate and the slideway; the above two methods control a small opening and closing angle between the sector steel plate and the slideway. When fastening the sector steel plate, the motor end plate, and the outer edge of the sealing plate with bolts, the sector steel plate can closely fit the sealing plate and the motor end plate, achieving better sealing.

[0045] The above is only the preferred specific embodiments of the present invention. These specific embodiments are different implementation manners based on the overall concept of the present invention, and the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A new sealing structure, characterized in that, The novel sealing structure includes a sealing plate (1), bearings, a handle (6), gears (2), slideways (3), an outer eaves of the sealing plate (8), and sector steel plates (5). Bearings are installed by drilling holes at specified positions on the sealing plate (1), and the number of specified positions for drilling holes on the sealing plate is 3 to 4. There are 3 to 4 gears and slideways arranged on the sealing plate, and 3 to 4 sector steel plates are arranged on the sealing plate. The sealing plate is divided into 3 to 4 regions with the slideway as the axis. The number of drilled holes is equal to the number of gears, slideways, and sector steel plates. The positions of the drilled holes divide the sealing plate into several regions, and the areas between the regions can be equal or unequal. The bearings are fixedly installed on the sealing plate (1), and the handle (6) is inserted into the middle of the bearings. The other end of the handle (6) is fixed through the gear (2). An outer eaves of the sealing plate (8) is provided on the periphery of the handle (6) side of the sealing plate (1). The slideway (3) is installed on the gear (2) side of the sealing plate (1). The guide rail (3 - 1) of the slideway (3) is fixedly welded on the sealing plate (1). The sector steel plate (5) is fixed on the sliding seat (3 - 2) of the slideway (3). A rack (4) is fixed on the side of the sliding seat (3 - 2) of the slideway (3). The rack (4) and the gear (2) at the end of the handle (6) form a gear-rack kinematic pair. Threaded holes are drilled on the sector steel plate (5). When installing the sealing structure, the sector steel plate (5) is retracted into the area of the sealing plate (1). After installation and positioning, the handle (6) is rotated to drive the gear (2) to rotate. The gear-rack kinematic pair converts the rotational motion into a linear motion. The linear motion of the rack (4) in the slideway (3) causes the sector steel plate (5) to be pushed out of the area of the sealing plate (1) to a specified area. The specified area is the position where the sector steel plate (5) covers the connection between the motor end plate (7) and the sealing plate (1), and the light holes of the motor end plate (7) and the outer eaves of the sealing plate (8) are aligned with the threaded holes of the sector steel plate (5). Sealing gaskets are respectively arranged at the contact positions of the sector steel plate (5), the motor end plate (7), and the outer eaves of the sealing plate (8). The sector steel plate (5), the motor end plate (7), and the outer eaves of the sealing plate (8) are fixed by bolts.

2. The novel sealing structure according to claim 1, characterized in that, When the sector steel plate (5) is retracted into the area of the sealing plate (1), the distance of each sector steel plate (5) from the center of the sealing plate (1) is different.

3. The novel sealing structure according to claim 1, characterized in that, When the sealing plate (1) and the outer eaves of the sealing plate (8) are fixed by lap welding, the size of the outer eaves of the sealing plate (8) is the same as that of the sector steel plate (5). When the outer eaves of the sealing plate (8) is machined by milling on the sealing plate (1), the sealing plate (1) and the outer eaves of the sealing plate (8) are an integral structure.

4. The novel sealing structure according to claim 1, characterized in that, The sealing plate (1) is a two-piece structure, that is, the sealing plate (1) is divided into two parts with equal areas. The two parts of the sealing plate (1) are fixed by a positioning pin and a bolt (9). The positioning pin and the bolt (9) are arranged on the handle side of the sealing plate.

5. The novel sealing structure according to claim 1, characterized in that, The motor end plate (7) and the outer edge of the sealing plate (8) are drilled with light holes, and the sector steel plate (5) is drilled with threaded holes.

6. The novel sealing structure according to claim 1, characterized in that, A copper ruler sealing ring is cast on the inner side of the middle of the sealing plate (1). The copper ruler sealing ring is double-layered, and a set is arranged at each end of the notch in the middle of the sealing plate (1).

7. The novel sealing structure according to claim 1, characterized in that, The outer diameter of the sealing plate (1) is smaller than the inner diameter of the motor end plate (7). The gasket is pasted on the motor end plate (7), and the gasket is made of chloroprene rubber.

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