Detachable suite structure of motor and motor

Abstract

The utility model belongs to the technical field of motors, and particularly relates to a detachable suite structure of a motor and the motor, the detachable suite structure comprises a suite mechanism arranged at one end of a motor main shaft, the suite mechanism comprises a spline housing and a spiral sealing sleeve, one end of the spline housing is provided with a mounting hole, the end part of the main shaft is provided with a screw hole, and the screw hole is provided with a screw hole. The spline housing is arranged in the mounting hole in a penetrating manner through a bolt and is screwed into the screw hole, so that the spline housing is axially and fixedly connected with the main shaft; a flat key is further arranged between the spline housing and the main shaft and used for achieving circumferential torque transmission. The spiral sealing sleeve is arranged at the bottom of the spline sleeve in a sleeving mode and synchronously rotates along with the spline sleeve. A sealing structure is arranged on the outer side of the spiral sealing sleeve, the sealing structure is of a threaded structure, a liquid medium migrating outwards along a leakage gap can be reversely conveyed back to the interior of the system according to the screw pump principle during rotation, and dynamic self-sealing is achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to motor technical field, concretely relates to a detachable kit structure of motor and motor. BACKGROUND

[0002] Servo motor is often used in mechanical hand, robot and non-standard automation equipment, most servo motors need to be connected with speed reducer to provide greater torque. There are multiple pairs of gear pairs in the speed reducer, and lubricating grease is used for lubrication. When running, the grease will leak from the speed reducer to the motor flange surface. If the motor shaft oil seal is not installed in place or is improperly installed during installation, the internal structure of the oil seal will be damaged, which will cause the grease to enter the motor and cause the rotor and stator of the motor to rust. In the prior art, the sealing of the motor shaft extension end usually relies on a general oil seal structure. This structure installs an oil seal outer ring outside the motor cover plate, and the oil seal inner ring is in close contact with the motor shaft. During the rotation of the motor, friction sliding and contact sealing are realized.

[0003] Currently, the contact part of the traditional oil seal structure is prone to gaps, which causes the internal medium of the equipment to leak, such as the lubricating grease of the motor bearing, which causes the bearing operating temperature to rise from the normal 60 DEG C to above 90 DEG C, and even "dry grinding" occurs. INVENTION CONTENTS

[0004] The utility model discloses a detachable kit structure of motor and motor mainly solve the problem that the contact part of the current traditional oil seal mechanism produces gap and causes liquid medium leakage.

[0005] To achieve the purpose, the utility model provides a kind of detachable kit structure for motor, including the kit mechanism of installation in the one end of motor spindle, the kit mechanism includes spline sleeve and spiral seal cover, one end of the spline sleeve is equipped with mounting hole, the end of the spindle is equipped with screw hole, the spline sleeve is passed in the mounting hole and is rotated into the screw hole, realize the axial fixed connection with spindle;

[0006] Flat key is further equipped between the spline sleeve and the spindle, for realizing circumferential torque transmission;

[0007] The spiral seal cover is sleeved on the bottom of spline sleeve and rotates synchronously with spline sleeve;

[0008] Sealing structure is provided on the outside of the spiral seal cover, and the sealing structure is screw structure, which can use screw pump principle to transport liquid medium outwardly migrated along leakage gap back to the inside of system when rotating, to realize dynamic self-sealing.

[0009] Preferably, the threaded structure is an external thread arranged on the outer circumferential surface of the spiral sealing sleeve, and the rotation direction is configured to generate an axial thrust towards the interior of the motor when the sleeve structure is normally working, so as to prevent liquid leakage.

[0010] Preferably, the spiral sealing sleeve and the spline sleeve are integrally formed or fixedly connected by interference fit, welding or threaded connection. The spline sleeve is sleeved with an output gear on the outer side of the end away from the motor.

[0011] Preferably, a flange is arranged at the front end cover of the motor, which is used to support external equipment or as a mounting reference of the sealed cavity.

[0012] Preferably, the spline sleeve inner hole is a involute spline or a rectangular spline structure, which is matched with the corresponding spline groove on the outer periphery of the main shaft, so as to improve the centring property and load capacity.

[0013] Preferably, the length of the threaded segment of the spiral sealing sleeve is 20mm-100mm, and the pitch is 1mm-5mm, and the specific parameters are optimized according to the working speed and medium viscosity.

[0014] Preferably, the spiral sealing sleeve is made of corrosion-resistant material, which is selected from any one of stainless steel, titanium alloy or engineering plastic.

[0015] Preferably, an auxiliary sealing element is further arranged between the spline sleeve and the front end cover of the motor, which is an O-ring or a check ring, and constitutes a multi-stage sealing system.

[0016] Preferably, a motor is further provided, which comprises the detachable sleeve structure, and the sleeve structure is detachably mounted on the main shaft of the output end of the motor, and is used for realizing power output and sealing protection in liquid environment.

[0017] Preferably, the sleeve structure is applied to the transmission sealing part of a submersible motor, an underwater pump, a seawater desalination device or a chemical process pump, and is used for preventing liquid medium from leaking along the main shaft.

[0018] The technical scheme provided by the utility model has at least the following technical effects:

[0019] 1. Multiple sealing synergistic effect:

[0020] Active sealing mechanism: by arranging an external thread structure on the spiral sealing sleeve, the screw pump effect generated by rotation is utilized to actively push the leaked liquid back to the inside of the system, and the sealing efficiency is significantly improved without the need for additional pressurization or auxiliary sealing elements;

[0021] Double connection guarantee: the "bolt + flat key" combined connection mode is adopted to ensure the synchronous realization of axial fixation and circumferential force transmission between the spline sleeve and the main shaft, and the connection is firm and strong in vibration resistance.

[0022] Detachable design: The entire kit structure is connected by bolts to allow for quick disassembly and replacement, facilitating on-site repair and maintenance;

[0023] 2. Compact structure and high integration: The transmission connection and sealing function are integrated into one design, reducing the number of parts and reducing assembly complexity;

[0024] 3. Wide range of applications: Suitable for rotary sealing applications in environments with water, oil or other lubricating liquid media, especially suitable for motor systems that are submerged for long periods of time. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0027] Figure 2 This is a structural schematic diagram from another angle of an embodiment of the present utility model;

[0028] Figure 3 This is a schematic diagram of the kit structure according to an embodiment of the present utility model;

[0029] Figure 4 This is a schematic diagram of the spline sleeve according to an embodiment of the present utility model;

[0030] Figure 5 for Figure 1 A magnified view of a portion of point A;

[0031] Key reference numerals in the attached drawings: 1. Motor; 2. Assembly mechanism; 3. Main shaft; 4. Spiral seal sleeve; 5. Bolt; 6. Spline sleeve; 7. Flange; 8. Output gear; Detailed Implementation

[0032] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of this utility model, and should not be construed as limiting the utility model.

[0033] In the description of the embodiments of the utility model, it is understood that the directions or position relations indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the directions or position relations shown in the drawings, and are only for the convenience of describing the embodiments of the utility model and simplifying the description, and thus cannot be understood as limiting the utility model.

[0034] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0035] As shown in Figures 1-2 A detachable kit structure for an electric machine mainly comprises an electric machine, a main shaft is arranged in the middle of the electric machine, one end of the main shaft extends out of the electric machine shell and is used for connecting an external load.

[0036] A kit mechanism is detachably mounted at the output end of the main shaft, and the kit mechanism comprises a spline sleeve and a spiral sealing sleeve.

[0037] Referring to Figure 3 and Figure 4 , one end of the spline sleeve is provided with a center mounting hole, and the corresponding end portion of the main shaft is processed with an internal screw hole. By using a high-strength bolt to pass through the mounting hole and screw into the screw hole of the main shaft, the axial fastening of the spline sleeve and the main shaft is realized. At the same time, a flat key is arranged between the matching surfaces of the spline sleeve and the main shaft, which is inserted into the key groove on the main shaft to realize circumferential positioning and torque transmission, and to avoid relative sliding.

[0038] The other end of the spline sleeve extends downward, and the bottom of the spline sleeve is sleeved with a spiral sealing sleeve. The spiral sealing sleeve and the spline sleeve can be fixedly connected through interference fit, welding or integral molding to ensure synchronous rotation. An output gear is sleeved on the outer side of the end of the spline sleeve away from the electric machine.

[0039] A continuous external thread is processed on the outer peripheral surface of the spiral sealing sleeve, which constitutes a sealing structure. The rotation direction of the external thread is set according to the normal working direction of the main shaft - when the main shaft rotates clockwise, the thread is designed as right-handed, so that the liquid in the gap is subjected to the screw pushing action to generate inward axial flow, that is, the so-called "screw pump effect".

[0040] When the liquid medium (such as water or lubricating oil) attempts to leak outward along the tiny gap between the main shaft and the sealing sleeve, due to the high-speed rotation of the helical sealing sleeve with the main shaft, the outer thread of the helical sealing sleeve drives the liquid to perform a spiral motion, generating an opposite pressure gradient, forcing the liquid to return to the inside of the motor, thereby effectively preventing leakage (see Figure 5 ).

[0041] Further, a flange is installed at the front end cover of the motor, which can be used to connect the pump body or other actuating mechanisms, and at the same time provides radial support for the sealing area, enhancing the overall rigidity.

[0042] In a preferred embodiment:

[0043] The length of the threaded segment of the helical sealing sleeve is 50mm, and the pitch is 2.5mm;

[0044] The material is selected to be corrosion-resistant stainless steel (such as 316L), which is suitable for seawater environment;

[0045] The inner hole of the spline sleeve is a involute spline structure, which improves the centering property and load capacity;

[0046] According to another embodiment of the utility model, in this embodiment, an O-ring is added between the spline sleeve and the front end cover to form a multi-stage sealing system, further improving the sealing safety.

[0047] The utility model is not limited to the above-mentioned embodiments, and equivalent transformations or modifications within the spirit and principles of the utility model should be included in the protection scope of the utility model.

[0048] Brief working principle:

[0049] The working process of the utility model is as follows:

[0050] After the motor is started, the main shaft drives the spline sleeve to rotate;

[0051] The spline sleeve realizes torque input through a flat key and is axially stable by bolts;

[0052] The helical sealing sleeve rotates with the spline sleeve, and the outer thread structure forms a fluid conveying effect similar to a screw pump during rotation;

[0053] If external liquid attempts to invade along the gap between the main shaft and the sealing sleeve, or internal lubricating medium attempts to leak outward, it will be blocked by the reverse thrust generated by the rotating thread and sent back to the original side;

[0054] The flange provides structural support to ensure smooth operation of the whole.

[0055] Application scenarios:

[0056] The utility model can be widely applied in the following fields:

[0057] Submersible motor shaft end seal

[0058] Submerged mixer, centrifugal pump drive system

[0059] High pressure sealing components in seawater desalination equipment

[0060] Chemical process pump, sewage pump and other occasions with corrosive liquid leakage risk.

[0061] The utility model has at least the following advantages:

[0062] 1、Multiple sealing synergies:

[0063] Active sealing mechanism: by setting outer thread structure on the spiral sealing cover, using screw rod pump effect generated by rotation, actively push the leakage liquid back to the inside of the system, significantly improve the sealing efficiency, without additional pressure or auxiliary sealing element;

[0064] Double connection guarantee: adopt "bolt + key" combination connection mode, ensure the axial fixation and circumferential force transmission synchronization between the spline sleeve and the main shaft, firm connection, strong anti-vibration;

[0065] Removable design: the whole set structure is connected by bolt, realizes quick disassembly and replacement, is convenient for on-site maintenance and maintenance;

[0066] 2、Compact structure, high integration: the transmission connection and sealing function are integrated, the number of parts is reduced, and the assembly complexity is reduced;

[0067] 3、Wide application range: suitable for rotary sealing scene in water, oil or other lubricating liquid medium environment, especially suitable for long-term immersion motor system.

[0068] The above is only the preferred embodiment of the utility model, and is not used for limiting the utility model, and any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A detachable kit structure of an electric machine, characterized by: The kit mechanism (2) is installed on one end of the main shaft (3) of the motor (1), and the kit mechanism (2) comprises a spline sleeve (6) and a spiral sealing sleeve (4), one end of the spline sleeve (6) is provided with a mounting hole, the end of the main shaft (3) is provided with a screw hole, the spline sleeve (6) is arranged in the mounting hole and screwed into the screw hole through the bolt (5), and the axial fixed connection with the main shaft (3) is realized. A flat key is further arranged between the spline sleeve (6) and the main shaft (3) to realize the circumferential torque transmission. The spiral sealing sleeve (4) is sleeved on the bottom of the spline sleeve (6) and rotates synchronously with the spline sleeve (6). The outer side of the spiral sealing sleeve (4) is provided with a sealing structure, the sealing structure is a threaded structure, and the liquid medium migrated outward along the leakage gap can be reversely transported back to the inside of the system by using the screw pump principle during rotation, so that dynamic self-sealing is realized.

2. The detachable kit structure of an electric machine according to claim 1, characterized in that: The threaded structure is an external thread arranged on the outer peripheral surface of the spiral sealing sleeve (4), and the rotation direction is configured to generate an axial thrust towards the inside of the motor (1) during normal working rotation of the kit structure, so as to prevent liquid leakage.

3. The removable kit structure of an electric machine according to claim 1 or 2, characterized in that: The spiral sealing sleeve (4) and the spline sleeve (6) are integrally formed or fixedly connected through interference fit, welding or threaded connection, and the outer side of the end of the spline sleeve (6) away from the motor (1) is sleeved with an output gear (8).

4. The detachable kit structure of the electric machine according to claim 1, characterized in that: The front end cover of the motor (1) is provided with a flange (7), and the flange (7) is used for supporting external equipment or as a mounting reference of a sealed cavity.

5. The modular kit of claim 1, wherein: The spline sleeve (6) is a involute spline or rectangular spline structure, which is matched with the corresponding spline groove on the outer periphery of the main shaft (3) to improve the centering property and bearing capacity.

6. The modular kit of claim 1, wherein: The length of the threaded segment of the spiral sealing sleeve (4) is 20mm-100mm, and the pitch is 1mm-5mm, and the specific parameters are optimized and designed according to the working speed and the viscosity of the medium.

7. The modular kit structure of an electric machine according to claim 1, characterized in that: The spiral sealing sleeve (4) is made of corrosion-resistant materials, which are selected from any one of stainless steel, titanium alloy or engineering plastics.

8. The modular kit of claim 1, wherein: An auxiliary sealing element is further arranged between the spline sleeve (6) and the front end cover of the motor (1), the auxiliary sealing element is an O-ring or a check ring, and a multi-stage sealing system is formed.

9. An electric machine characterized by: The detachable kit structure of the motor according to any one of claims 1-8 is detachably installed on the main shaft (3) of the output end of the motor (1), and is used for realizing power output and sealing protection in a liquid environment.

Images