Blade clamping device fixed under assistance of magnetic force

Abstract

The invention relates to the technical field of blade clamping, and provides a magnetic force auxiliary fixing blade clamping device which comprises a base and further comprises a fixing plate fixedly installed at the bottom of the base, and a guide hole is formed in the lower surface of the fixing plate; the electromagnet is fixedly mounted on the lower surface of the fixed plate; guide columns are fixedly installed on the lifting plate, first inclined planes are formed on the two sides of the lifting plate respectively, and second inclined planes are formed at the two ends of the lifting plate respectively; the driving assembly is used for controlling the lifting plate to move up and down; the two first limiting assemblies comprise first clamping jaws, first clamping grooves are formed in the first clamping jaws, third inclined planes are formed on the first clamping jaws, and the third inclined planes make contact with the first inclined planes; and each second limiting assembly comprises a second clamping jaw, a second clamping groove matched with a bottom plate of the blade is formed in each second clamping jaw, a fourth inclined face is formed on each second clamping jaw, and the fourth inclined faces make contact with the second inclined faces.

Description

Technical Field

[0001] The invention relates to the technical field of blade clamping, and in particular to a blade clamping device assisted by magnetic force. Background Art

[0002] Blades are key parts of steam turbines. They withstand high temperature, high pressure, huge centrifugal force, steam force, steam excitation force, corrosion and vibration, as well as water droplet erosion in the wet steam zone under extremely harsh conditions. Their aerodynamic performance, processing geometry, surface roughness, installation clearance, operating conditions, scaling and other factors all affect the efficiency and output of the steam turbine. Their structural design, vibration intensity and operating mode have a decisive influence on the safety and reliability of the unit.

[0003] The current blade clamping device generally fixes the blade by pressing the blade with a clamping block, but this clamping method may cause damage and deformation of the blade, thereby affecting the normal use of the blade. Summary of the invention

[0004] In view of the defects in the prior art, an object of the present invention is to provide a blade clamping device with magnetic force assisted fixation, which can reduce the damage and deformation that may occur to the blade during the clamping process.

[0005] In order to achieve the above object, the present invention is implemented by the following technical solution: a blade clamping device with magnetic force auxiliary fixation, used for clamping a blade, comprising a base, and also comprising:

[0006] A fixing plate, the fixing plate is fixedly mounted on the bottom of the base, and a guide hole extending upward is opened on the lower surface of the fixing plate;

[0007] An electromagnet, wherein the electromagnet is fixedly mounted on the lower surface of the fixing plate;

[0008] A lifting plate, the lifting plate is arranged below the fixed plate, a guide column is fixedly mounted on the lifting plate, the guide column is in sliding contact with the inner wall of the guide hole, first inclined surfaces are formed on both sides of the lifting plate, and second inclined surfaces are formed on both ends of the lifting plate;

[0009] A driving assembly, the driving assembly is used to control the lifting plate to move up and down;

[0010] Two first limit assemblies, the two first limit assemblies are respectively arranged on both sides of the electromagnet, the first limit assemblies include a first clamping claw, the first clamping claw is provided with a first clamping groove adapted to the bottom plate of the blade, a third inclined surface is formed on the first clamping claw, the third inclined surface is in contact with the first inclined surface, and when the lifting plate moves upward, the first inclined surface makes the third inclined surface have a tendency to approach the electromagnet;

[0011] Two second limit assemblies are respectively arranged at both ends of the electromagnet, the second limit assemblies include a second claw, the second claw is provided with a second groove adapted to the bottom plate of the blade, a fourth inclined surface is formed on the second claw, the fourth inclined surface is in contact with the second inclined surface, and when the lifting plate moves upward, the second inclined surface makes the fourth inclined surface tend to approach the electromagnet.

[0012] Furthermore, the driving assembly includes a cylinder, a cylinder body of the cylinder is fixedly connected to the base, and a piston rod of the cylinder is fixedly connected to the lifting plate.

[0013] Furthermore, the first claw is provided with a first guide groove extending inwardly;

[0014] The first limiting assembly also includes a first connecting plate, a first guide rod and a first spring. The first connecting plate is fixedly mounted on the base. The first guide rod is fixedly mounted on the first connecting plate and is in sliding contact with the inner wall of the first guide groove. The first spring causes the first claw to have a tendency to move outward.

[0015] Furthermore, the second claw is provided with a second guide groove extending inwardly;

[0016] The second limiting assembly also includes a second connecting plate, a second guide rod and a second spring. The second connecting plate is fixedly mounted on the base. The second guide rod is fixedly mounted on the second connecting plate and is in sliding contact with the inner wall of the second guide groove. The second spring causes the second claw to have a tendency to move outward.

[0017] Furthermore, it also includes four permanent magnets, which are respectively arranged around the electromagnet and fixedly connected to the lower surface of the fixing plate.

[0018] Furthermore, a first groove adapted to the electromagnet is formed on the lower surface of the fixing plate, and a second groove adapted to the permanent magnet is formed on the lower surface of the fixing plate.

[0019] Beneficial effects of the present invention: The present invention provides a blade clamping device with magnetic force auxiliary fixation, which uses an electromagnet to strongly adsorb the bottom plate of the blade, thereby fixing the blade. The first limit assembly and the second limit assembly only play a protective role and do not generate interaction force with the blade, so it can reduce the damage and deformation that may occur to the blade during the clamping process. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1It is a schematic diagram of the three-dimensional structure of the present invention at a first viewing angle;

[0021] Figure 2 is a schematic diagram of the three-dimensional structure of the present invention at a second viewing angle;

[0022] Figure 3 It is a bottom view structural schematic diagram of the present invention;

[0023] Figure 4 It is a schematic diagram of the top view of the structure of the present invention;

[0024] Figure 5 for Figure 4 Schematic diagram of the cross-sectional structure along the AA direction;

[0025] Figure 6 for Figure 4 Schematic diagram of the cross-sectional structure along the BB direction.

[0026] Figure markings: 10-base, 20-fixed plate, 21-guide hole, 22-first groove, 23-second groove, 30-electromagnet, 40-lifting plate, 41-guide column, 42-first inclined surface, 43-second inclined surface, 50-driving assembly, 51-cylinder, 60-first limiting assembly, 61-first claw, 611-first groove, 612-third inclined surface, 62-first connecting plate, 63-first guide rod, 64-first spring, 70-second limiting assembly, 71-second claw, 711-second groove, 712-fourth inclined surface, 72-second connecting plate, 73-second guide rod, 74-second spring, 80-permanent magnet. DETAILED DESCRIPTION

[0027] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0028] In this application, unless otherwise clearly specified and limited, the terms "connection" and "fixation" 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.

[0029] In the description of the present application, it should be understood that the terms "longitudinal", "lateral", "horizontal", "top", "bottom", "up", "down", "inside" and "outside" etc. indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0030] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0031] like Figure 1-Figure 6 As shown, the present invention provides a magnetically assisted blade clamping device for clamping blades, comprising a base 10 and a control cabinet, and also comprising a fixing plate 20, an electromagnet 30, a lifting plate 40, a driving assembly 50, two first limit assemblies 60 and two second limit assemblies 70.

[0032] The fixing plate 20 is fixedly mounted on the bottom of the base 10 , and a guide hole 21 extending upward is formed on the lower surface of the fixing plate 20 . Preferably, there are four guide holes 21 , which are respectively located around the fixing plate 20 .

[0033] The electromagnet 30 is fixedly mounted on the lower surface of the fixing plate 20 and is electrically connected to the control cabinet.

[0034] The lifting plate 40 is disposed below the fixed plate 20, and a guide column 41 is fixedly mounted on the lifting plate 40. Preferably, there are four guide columns 41, and the four guide columns 41 correspond to the four guide holes 21 one by one, and the guide columns 41 are in sliding contact with the inner wall of the guide hole 21. First inclined surfaces 42 are formed on both sides of the lifting plate 40, and second inclined surfaces 43 are formed on both ends of the lifting plate 40.

[0035] The driving assembly 50 is used to control the lifting plate 40 to move up and down;

[0036] Two first limit assemblies 60 are respectively arranged on both sides of the electromagnet 30, and the first limit assemblies 60 include a first clamping claw 61. The first clamping claw 61 is provided with a first clamping groove 611 adapted to the bottom plate of the blade. A third inclined surface 612 is formed on the first clamping claw 61, and the third inclined surface 612 is always in contact with the first inclined surface 42. When the lifting plate 40 moves upward, the first inclined surface 42 makes the third inclined surface 612 have a tendency to approach the electromagnet 30.

[0037] The two second limit assemblies 70 are respectively arranged at the two ends of the electromagnet 30, and the second limit assemblies 70 include a second clamping claw 71. The second clamping claw 71 is provided with a second clamping groove 712 adapted to the bottom plate of the blade, and the second clamping claw 71 is formed with a fourth inclined surface 712, which is always in contact with the second inclined surface 43. When the lifting plate 40 moves upward, the second inclined surface 43 makes the fourth inclined surface 712 have a tendency to approach the electromagnet 30.

[0038] In the initial state, the distance between the lifting plate 40 and the fixing plate 20 is relatively far, and at this time, the first clamping claw 61 and the second clamping claw 71 are both far away from the electromagnet 30 .

[0039] The specific use process of this device is as follows: First, the staff contacts the bottom plate of the blade with the electromagnet 30, and makes the bottom plate of the blade completely aligned with the electromagnet 30. Then, the staff energizes the electromagnet 30 through the control cabinet, and the electromagnet 30 will strongly adsorb the bottom plate of the blade after being energized, thereby fixing the blade. Next, the staff releases the blade, and the drive assembly 50 starts. The drive assembly 50 controls the lifting plate 40 to move upward. Under the cooperation of the first inclined surface 42 and the third inclined surface 612, and the second inclined surface 43 and the fourth inclined surface 712, the two first claws 61 and the two second claws 71 will move inward at the same time until the first slot 611 on the first claw 61 is matched with the bottom plate of the blade, and the second slot 712 on the second claw 71 is matched with the bottom plate of the blade.

[0040] In the present device, the first limit assembly 60 and the second limit assembly 70 only play a protective role to prevent the base plate of the blade from accidentally falling off during the processing of the blade. The first limit assembly 60 and the second limit assembly 70 do not generate any interaction force with the blade, and only achieve fixed clamping of the blade through the strong adsorption of the electromagnet 30, thereby reducing the damage and deformation that may occur to the blade during the clamping process.

[0041] In one embodiment, the driving assembly 50 includes a cylinder 51 , which is longitudinally arranged and electrically connected to the control cabinet. The cylinder body of the cylinder 51 is fixedly connected to the base 10 , and the piston rod of the cylinder 51 is fixedly connected to the lifting plate 40 .

[0042] In the initial state, the piston rod of the cylinder 51 is in an extended state. When the drive assembly 50 is started, the control cabinet controls the piston rod of the cylinder 51 to retract. The drive assembly 50 has a simple structure and is easy to use.

[0043] In one embodiment, a first guide groove extending inward is formed on the outer side surface of the first claw 61 .

[0044] The first limiting assembly 60 further includes a first connecting plate 62, a first guide rod 63 and a first spring 64. The first connecting plate 62 is fixedly mounted on the base 10. The first guide rod 63 is fixedly mounted on the first connecting plate 62 and is in sliding contact with the inner wall of the first guide groove. The first spring 64 is sleeved on the first guide rod 63, and the two ends of the first spring 64 are respectively fixedly connected to the first connecting plate 62 and the first claw 61, and the first spring 64 makes the first claw 61 have a tendency to move outward.

[0045] After the device is used, the piston rod of the cylinder 51 returns to the extended state. At this time, due to the action of the first spring 64, the first claw 61 will automatically return to the initial state without manual reset, which is further convenient for the staff to use.

[0046] In one embodiment, a second guide groove extending inwardly is formed on the outer side surface of the second claw 71 .

[0047] The second limiting assembly 70 further includes a second connecting plate 72, a second guide rod 73 and a second spring 74. The second connecting plate 72 is fixedly mounted on the base 10, and the second guide rod 73 is fixedly mounted on the second connecting plate 72 and is in sliding contact with the inner wall of the second guide groove. The second spring 74 is sleeved on the second guide rod 73, and the two ends of the second spring 74 are respectively fixedly connected to the second connecting plate 72 and the second claw 71, and the second spring 74 makes the second claw 71 have a tendency to move outward.

[0048] After the device is used, the piston rod of the cylinder 51 returns to the extended state. At this time, due to the action of the second spring 74, the second claw 71 will automatically return to the initial state without manual reset, which is further convenient for the staff to use.

[0049] In one embodiment, four permanent magnets 80 are further included. The four permanent magnets 80 are respectively disposed around the electromagnet 30 and are fixedly connected to the lower surface of the fixing plate 20 .

[0050] During the use of the device, the staff can first contact the bottom plate of the blade with the permanent magnet 80, so that the bottom plate of the blade will be adsorbed by the four permanent magnets 80. At this time, there is no need to deliberately align the bottom plate of the blade with the electromagnet 30, but it is necessary to ensure that the general direction of the blade is correct. Since the adsorption force of the permanent magnet 80 is weak, when the first claw 61 and the two second claws 71 move inward at the same time later, the first claw 61 and the second claw 71 will push the bottom plate of the blade, causing the bottom plate of the blade to move. When the first claw 61 and the second claw 71 stop moving, the bottom plate of the blade will be completely aligned with the electromagnet 30, and the control cabinet will then energize the electromagnet 30.

[0051] The design of the permanent magnet 80 allows the staff to release their hands when the base plate of the blade contacts the permanent magnet 80. Subsequently, the first claw 61 and the two second claws 71 move inward at the same time, which can automatically and completely align the base plate of the blade with the electromagnet 30, further facilitating the use of the staff.

[0052] In one embodiment, the lower surface of the fixing plate 20 is provided with a first groove 22 adapted to the electromagnet 30, and the lower surface of the fixing plate 20 is also provided with a second groove 23 adapted to the permanent magnet 80. The design of the first groove 22 and the second groove 23 can respectively hide the electromagnet 30 and the permanent magnet 80, thereby improving the aesthetics of the device.

[0053] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention.

[0054] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A blade clamping device with magnetic force assisted fixing, used for clamping a blade, comprising a base, characterized in that: Also includes: A fixing plate, the fixing plate is fixedly mounted on the bottom of the base, and a guide hole extending upward is opened on the lower surface of the fixing plate; An electromagnet, wherein the electromagnet is fixedly mounted on the lower surface of the fixing plate; A lifting plate, the lifting plate is arranged below the fixed plate, a guide column is fixedly mounted on the lifting plate, the guide column is in sliding contact with the inner wall of the guide hole, first inclined surfaces are formed on both sides of the lifting plate, and second inclined surfaces are formed on both ends of the lifting plate; A driving assembly, the driving assembly is used to control the lifting plate to move up and down; Two first limit assemblies, the two first limit assemblies are respectively arranged on both sides of the electromagnet, the first limit assemblies include a first clamping claw, the first clamping claw is provided with a first clamping groove adapted to the bottom plate of the blade, a third inclined surface is formed on the first clamping claw, the third inclined surface is in contact with the first inclined surface, and when the lifting plate moves upward, the first inclined surface makes the third inclined surface have a tendency to approach the electromagnet; Two second limit assemblies are respectively arranged at both ends of the electromagnet, the second limit assemblies include a second claw, the second claw is provided with a second groove adapted to the bottom plate of the blade, a fourth inclined surface is formed on the second claw, the fourth inclined surface is in contact with the second inclined surface, and when the lifting plate moves upward, the second inclined surface makes the fourth inclined surface tend to approach the electromagnet.

2. The blade clamping device with magnetic force assisted fixation according to claim 1, characterized in that: The driving assembly comprises a cylinder, a cylinder body of the cylinder is fixedly connected to the base, and a piston rod of the cylinder is fixedly connected to the lifting plate.

3. The blade clamping device with magnetic force assisted fixation according to claim 1, characterized in that: The first claw is provided with a first guide groove extending inwardly; The first limiting assembly also includes a first connecting plate, a first guide rod and a first spring. The first connecting plate is fixedly mounted on the base. The first guide rod is fixedly mounted on the first connecting plate and is in sliding contact with the inner wall of the first guide groove. The first spring causes the first claw to have a tendency to move outward.

4. The blade clamping device with magnetic force assisted fixation according to claim 3, characterized in that: The second claw is provided with a second guide groove extending inwardly; The second limiting assembly also includes a second connecting plate, a second guide rod and a second spring. The second connecting plate is fixedly mounted on the base. The second guide rod is fixedly mounted on the second connecting plate and is in sliding contact with the inner wall of the second guide groove. The second spring causes the second claw to have a tendency to move outward.

5. The blade clamping device with magnetic force assisted fixation according to claim 1, characterized in that: It also includes four permanent magnets, which are respectively arranged around the electromagnet and fixedly connected to the lower surface of the fixing plate.

6. The blade clamping device with magnetic force assisted fixation according to claim 5, characterized in that: The lower surface of the fixing plate is provided with a first groove adapted to the electromagnet, and the lower surface of the fixing plate is also provided with a second groove adapted to the permanent magnet.

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