CN117968947A - Online monitoring device for rotary dynamic balance of mechanical equipment - Google Patents

Abstract

The present invention discloses an online monitoring device for rotating dynamic balance of mechanical equipment, comprising a placing frame, a controller is installed on the top of the placing frame, and a first screw is embedded and rotatably installed in the inner cavity of the top of the controller, a mounting head is provided on the threaded sleeve of the first screw, the positioning rod is embedded and slidably arranged in the inner wall cavity at the bottom of the mounting frame, a positioning head is fixed to the protruding part of the inner end of the positioning rod, a detection component and a coloring component are arranged in the positioning head, the detection component is used to perform dynamic balance detection on the roller, and the coloring component is used to color the roller; the limit rod is fixed on the inner wall of the top of the mounting frame, one side of the mounting sleeve is threadedly sleeved on the second screw, and a position control component is arranged at the bottom and inside of the mounting sleeve. The online monitoring device for rotating dynamic balance of mechanical equipment can conveniently perform dynamic balance detection on the roller on the equipment, and is suitable for rollers of different diameters.

Description

An online monitoring device for rotating dynamic balance of mechanical equipment

Technical Field

The invention relates to the technical field of dynamic balance detection, and in particular to an online monitoring device for rotating dynamic balance of mechanical equipment.

Background technique

In the production and processing of garbage bags, it is necessary to perform operations such as slitting, sealing and rolling on the garbage bags. In order to ensure the smooth transportation of the garbage bags, most of them need to use tension conveying equipment equipped with multiple rollers. The rollers are mostly used to rotate at high speed. During long-term use, the rollers are easily affected by factors such as wear and tear, and the dynamic balance is unbalanced, which will cause imbalance in the conveying process. In severe cases, the garbage bags will be damaged and wrinkled during transportation, affecting the quality of its production. It is time-consuming and laborious to disassemble each roller for monitoring, so online monitoring of dynamic balance is required. However, the existing online dynamic balance monitoring device has the following problems when used:

Since rollers are mostly arranged in rows on the equipment frame with a short distance between adjacent rollers, existing online dynamic balancing monitoring devices are not convenient for convenient positioning monitoring. Most of them require centering and positioning monitoring of the entire roller, and the roller needs to be covered. However, since the distance between adjacent rollers is short, this method is easily affected by the volume and space of the device, and there are many inconveniences in use. At the same time, existing online dynamic balancing monitoring devices are not convenient for convenient monitoring of rollers of different diameters and depths. Regarding positioning accuracy, when it is suitable for rollers of different specifications and positions, it is necessary to measure and calculate the position, and then perform subsequent centering and positioning, which will undoubtedly waste a lot of time. At the same time, the calculation process is relatively complicated and the operation is cumbersome, which is not conducive to large-scale rapid monitoring.

In view of the above problems, it is urgent to carry out innovative design based on the original dynamic balancing online monitoring device.

Summary of the invention

The purpose of the present invention is to provide an online monitoring device for the rotational dynamic balance of mechanical equipment to solve the problem that the existing online monitoring device for dynamic balance proposed in the above background technology is not convenient for convenient positioning monitoring, and is not convenient for convenient monitoring of rollers of different diameters and depths. The technical solution of the present invention aims at the technical problem that the existing technical solution is too single, and provides a solution that is significantly different from the existing technology.

To achieve the above object, the present invention provides the following technical solution: an online monitoring device for rotating dynamic balance of mechanical equipment, comprising a placement frame, a controller is installed on the top of the placement frame, and a first screw is embedded and rotatably installed in the inner cavity of the top of the controller, a mounting head is provided on the threaded sleeve of the first screw, and the bottom of the mounting head is connected to the mounting frame through an electric push rod;

It also includes a positioning rod, which is embedded and slidably arranged in the cavity of the inner wall at the bottom of the mounting frame, and an electromagnet is arranged on the top of the middle part of the positioning rod, and the electromagnet is embedded and fixed in the mounting frame, a positioning head is fixed to the protruding part of the inner end of the positioning rod, and a first elastic telescopic rod is connected between the outer side of the positioning head and the inner wall of the mounting frame, and a detection component and a coloring component are arranged in the positioning head, the detection component is used to perform dynamic balance detection on the roller shaft, and the coloring component is used to color the roller shaft;

A limit rod, the limit rod is fixed on the top inner wall of the mounting frame, and a mounting sleeve is provided on the sliding sleeve of the limit rod, one side of the mounting sleeve is threadedly sleeved on the second screw rod, and the second screw rod is rotatably provided on the top inner wall of the mounting frame, a position control component is provided at the bottom and inside of the mounting sleeve, and the position control component is used to position the positioning head.

Preferably, the first screw drives the mounting head to slide in the placement rack cavity, and the first screw is driven by a motor.

Preferably, two positioning rods are symmetrically arranged at the bottom of the mounting frame, and the middle part of the positioning rod is made of metal material and is magnetically adsorbed by the electromagnet, and the bottom of the positioning head at the inner end of the positioning rod is designed as an inclined structure.

Preferably, the detection component includes a first oil chamber, which is opened on the inner wall of the positioning head, and a detection piston rod is connected to the first oil chamber through a first spring, and a contact piece is fixed to the inner end of the detection piston rod, and an I-shaped rod is connected to the top cavity of the first oil chamber through a second spring, and a first pressure sensor is arranged on the top of the I-shaped rod, and the first pressure sensor is fixed on the top wall of the top cavity of the first oil chamber.

Preferably, the contact piece is located in the middle of the positioning head, and the contact piece and the inner wall of the positioning head are in the same horizontal plane.

Preferably, the coloring component includes a first piston rod, which is fixed at the top of the middle part of the detection piston rod, and the first piston rod is located in the second oil chamber, and the second oil chamber is opened inside the positioning head, a second piston rod is arranged on the top of the second oil chamber, and the inner end of the second piston rod is connected to the coloring head, and the coloring head is embedded in the inner wall cavity of the positioning head through a third spring.

Preferably, the rod portion of the first piston rod is designed as an "L"-shaped structure, and the second oil chamber is designed as a "U"-shaped structure.

Preferably, the position control component includes a contact plate, which is arranged at the bottom of the mounting sleeve through a second elastic telescopic rod, and a trigger rod is fixed to the top of the contact plate, the trigger rod is slidably arranged in the trigger cavity, and the trigger cavity is opened at the bottom of the mounting sleeve, a trigger head and a second pressure sensor are arranged in the middle inner wall cavity of the trigger cavity, and the trigger head is elastically slidably installed in the middle inner wall cavity of the trigger cavity through a fourth spring, and a third pressure sensor is fixed to the top of the trigger cavity.

Preferably, the bottom surface of the inner end of the trigger head is designed to be an inclined structure, and the inclined surface of the inner end of the trigger head corresponds to the position of the top inclined surface of the trigger rod.

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

1. The present invention is provided with a detection component and a coloring component. By moving the mounting frame downward, the positions of the positioning rod and the positioning head are first determined, so that the two contact pieces are vertically tangent to the two sides of the roller shaft. When the roller shaft is in a normal state, the contact piece is only in contact and will not move. When the roller shaft position is unbalanced, the contact piece moves under force. On the one hand, the first pressure sensor is triggered to stop the device from moving and stay in the unbalanced area of the roller shaft. On the other hand, the coloring component can be used to synchronously color the corresponding area of the roller shaft to further confirm the unbalanced position and improve the detection effect. The two contact pieces are detected independently, and only the downward movement detection is required on both sides of the roller shaft, without the need to disassemble the roller shaft. At the same time, the space occupation is reduced, and there is no need to perform center positioning detection at the circumferential position.

2. The present invention sets a position control component. When the mounting frame moves downward, the contact plate contacts the top of the roller shaft, and is forced to drive the trigger rod to move upward. The second pressure sensor and the third pressure sensor perform sensing in different areas. On the one hand, when the vertical area of the positioning head contacts the central side of the roller shaft, the position of the positioning head can be positioned and fixed by the electromagnet, thereby facilitating the subsequent contact detection between the contact piece and the central side of the roller shaft. On the other hand, the position of the contact piece can be positioned so that the center of the contact piece can contact the central side of the roller shaft, thereby improving the accuracy of roller shaft detection. Furthermore, the installation sleeve and the pressure sensor can be adjusted according to the diameter of the roller shaft. The initial position of the contact plate, that is, the initial distance between the contact plate and the horizontal center line of the contact piece, can be used to position rollers of different diameters twice, which is highly practical. At the same time, this method does not need to strictly align the longitudinal center line of the placement frame with the longitudinal center line of the roller. The entire bottom surface of the contact plate is on the cross-sectional line of the top of the roller, so any offset will not affect the positioning effect of the contact plate. At the same time, this method does not need to be adjusted according to the depth of the roller on the equipment frame. Since the position of the contact plate, the positioning head and the contact piece remain corresponding, positioning can be achieved only through the induction of each pressure sensor. The entire use process is very convenient and does not require complicated measurements.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a schematic diagram of the front cross-sectional structure of the present invention;

Fig. 2 is a schematic diagram of the side sectional structure of the present invention;

FIG3 is a schematic diagram of the positioning rod structure of the present invention;

FIG4 is a schematic diagram of the internal structure of the positioning head of the present invention;

FIG5 is an enlarged structural schematic diagram of point A in FIG4 of the present invention;

FIG6 is a schematic diagram of the side structure of the contact sheet of the present invention;

FIG7 is an enlarged structural schematic diagram of point B in FIG1 of the present invention;

FIG. 8 is a schematic diagram of the installation position structure of the present invention.

In the figure: 1, placement rack; 2, controller; 3, first screw rod; 4, mounting head; 5, electric push rod; 6, mounting rack; 7, positioning rod; 8, electromagnet; 9, positioning head; 10, first elastic telescopic rod; 11, detection component; 111, first oil chamber; 112, first spring; 113, detection piston rod; 114, contact piece; 115, I-shaped rod; 116, second spring; 117, first pressure sensor; 12, coloring component; 121, first piston rod; 122, second oil chamber; 123, second piston rod; 124, coloring head; 125, third spring; 13, limit rod; 14, mounting sleeve; 15, second screw rod; 16, position control component; 161, second elastic telescopic rod; 162, contact plate; 163, trigger rod; 164, trigger chamber; 165, fourth spring; 166, trigger head; 167, second pressure sensor; 168, third pressure sensor.

Detailed ways

The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

Embodiment 1: Please refer to Figures 1 to 6. The present invention provides a technical solution: an online monitoring device for rotating dynamic balance of mechanical equipment, comprising a placement frame 1, a controller 2 is installed on the top of the placement frame 1, and a first screw rod 3 is embedded and rotatably installed in the inner cavity of the top of the controller 2, a mounting head 4 is threadedly sleeved on the first screw rod 3, and the bottom of the mounting head 4 is connected to the mounting frame 6 through an electric push rod 5, the first screw rod 3 drives the mounting head 4 to slide in the cavity of the placement frame 1, and the first screw rod 3 is driven by a motor; a positioning rod 7 is embedded and slidably arranged in the inner wall cavity at the bottom of the mounting frame 6, and an electromagnet 8 is arranged on the top of the middle part of the positioning rod 7, and the electromagnet 8 is embedded and fixed in the mounting frame 6, a positioning head 9 is fixed to the protruding part of the inner end of the positioning rod 7, and a first elastic telescopic rod 10 is connected between the outer side of the positioning head 9 and the inner wall of the mounting frame 6, and a detection component 11 and a coloring component 12 are arranged in the positioning head 9, the detection component 11 is used to perform dynamic balance detection on the roller shaft, and the coloring component 12 is used to color the roller shaft;

Two positioning rods 7 are symmetrically arranged at the bottom of the mounting frame 6, and the middle part of the positioning rod 7 is made of metal material and is magnetically adsorbed by the electromagnet 8, and the bottom of the positioning head 9 at the inner end of the positioning rod 7 is designed as a slope structure; the detection component 11 includes a first oil chamber 111, the first oil chamber 111 is opened on the inner wall of the positioning head 9, and the first oil chamber 111 is connected to a detection piston rod 113 through a first spring 112, and a contact piece 114 is fixed to the inner end of the detection piston rod 113, and the top cavity of the first oil chamber 111 is connected to an I-shaped rod 115 through a second spring 116, and a first pressure sensor 117 is arranged on the top of the I-shaped rod 115, and the first pressure sensor 117 is fixed on the top wall of the top cavity of the first oil chamber 111 ; The contact piece 114 is located in the middle of the positioning head 9, and the contact piece 114 and the inner wall of the positioning head 9 are in the same horizontal plane; the coloring component 12 includes a first piston rod 121, the first piston rod 121 is fixed to the top of the middle of the detection piston rod 113, and the first piston rod 121 is located in the second oil cavity 122, and the second oil cavity 122 is opened inside the positioning head 9, and the top of the second oil cavity 122 is provided with a second piston rod 123, and the inner end of the second piston rod 123 is connected to the coloring head 124, and the coloring head 124 is embedded in the inner wall cavity of the positioning head 9 through a third spring 125; the rod part of the first piston rod 121 is designed as an "L"-shaped structure, and the second oil cavity 122 is designed as a "U"-shaped structure;

The two contact pieces 114 are in contact with both ends of the roller shaft. When the roller shaft rotates, the first screw rod 3 drives the mounting head 4 to move, and the roller shaft is detected longitudinally. When an unbalanced area appears, the contact piece 114 is moved by force, and the first pressure sensor 117 senses it.

Embodiment 2: Based on Embodiment 1, please refer to Figures 1-3 and 7-8. A controller 2 is installed on the top of the placement rack 1, and a first screw rod 3 is embedded and rotatably installed in the inner cavity of the top of the controller 2. A mounting head 4 is threadedly sleeved on the first screw rod 3, and the bottom of the mounting head 4 is connected to the mounting rack 6 through an electric push rod 5; the first screw rod 3 drives the mounting head 4 to slide in the cavity of the placement rack 1, and the first screw rod 3 is driven by a motor, a limit rod 13 is fixed on the inner wall of the top of the mounting rack 6, and a mounting sleeve 14 is slidably sleeved on the limit rod 13, one side of the mounting sleeve 14 is threadedly sleeved on the second screw rod 15, and the second screw rod 15 is rotatably set on the inner wall of the top of the mounting rack 6, a position control component 16 is set at the bottom and inside of the mounting sleeve 14, and the position control component 16 is used to locate the position of the positioning head 9;

The position control assembly 16 includes a contact plate 162, which is arranged at the bottom of the mounting sleeve 14 through a second elastic telescopic rod 161, and a trigger rod 163 is fixed on the top of the contact plate 162, and the trigger rod 163 is slidably arranged in a trigger cavity 164, and the trigger cavity 164 is opened at the bottom of the mounting sleeve 14, a trigger head 166 and a second pressure sensor 167 are arranged in the cavity of the inner wall of the middle part of the trigger cavity 164, and the trigger head 166 is elastically slidably installed in the cavity of the inner wall of the middle part of the trigger cavity 164 through a fourth spring 165, and a third pressure sensor 168 is fixed on the top of the trigger cavity 164; the bottom surface of the inner end of the trigger head 166 is designed to be an inclined structure, and the inner end inclined surface of the trigger head 166 corresponds to the position of the top inclined surface of the trigger rod 163;

According to rollers of different diameters, the height of the mounting sleeve 14 is adjusted, and the distance between the bottom of the contact plate 162 and the transverse center line of the contact piece 114 is adjusted, so that the position of the contact piece 114 is automatically positioned.

Working principle: When using the online monitoring device for the rotational dynamic balance of the mechanical equipment, as shown in Figure 1-8, first rotate the second screw 15 according to the diameter of the roller to be detected. Under the limiting action of the limiting rod 13, the mounting sleeve 14 can be driven to move vertically to adjust the initial position of the contact plate 162. Then place the placement frame 1 on the equipment frame so that the two positioning heads 9 at the bottom of the mounting frame 6 are located above the roller. Start the electric push rod 5 to drive the mounting frame 6 to move downward, and then drive the positioning rod 7 and the positioning head 9 to move downward. The inclined surface at the bottom of the positioning head 9 contacts the roller, and the positioning rod 7 is driven inward by the force. When the vertical inner wall of the positioning head 9 contacts the outermost side of the roller, the contact plate 162 also contacts the top of the roller and pushes the trigger rod 163 to move upward in the trigger cavity 164, so that the trigger rod 163 and the trigger head 163 are in contact with each other. 166 inclined surface contacts, squeezes the trigger head 166, so that the trigger head 166 contacts the second pressure sensor 167. At this time, the second pressure sensor 167 transmits a signal to the controller 2, and the controller 2 controls the electromagnet 8 to energize to adsorb and fix the positioning rod 7, fix the positions of the positioning rod 7 and the positioning head 9, so that the inner wall of the positioning head 9 is in contact with the outer side of the center of the roller shaft, and as the electric push rod 5 drives the mounting frame 6 to continue to move downward, the trigger rod 163 continues to move upward and contacts the third pressure sensor 168. At this time, the controller 2 controls the electric push rod 5 to stop, so that the contact piece 114 is in contact with the outer side of the center of the roller shaft, and the installation of the position is completed. Then, the motor drives the first screw 3 to rotate, drives the mounting frame 6 to move horizontally, and cooperates with the rotation of the roller shaft to perform detection. In this process, the needle When the contact plate 162 locates the position of the positioning rod 7 and the positioning head 9, since the distance between the trigger rod 163 and the trigger head 166 and the third pressure sensor 168 is fixed, during production, the distance between the trigger head 166 and the third pressure sensor 168 can be made the same as the distance between the vertical area of the inner wall of the positioning head 9 and the center of the contact piece 114. When the contact plate 162 is driven by the force to drive the trigger rod 163 to the position of the trigger head 166, it means that the vertical area of the inner wall of the positioning head 9 has reached the outside of the center of the roller shaft. At this time, the two positioning heads 9 are in a state of vertical tangency with the outside of the roller shaft. The position of the positioning rod 7 can be fixed, thereby fixing the position of the positioning head 9, so that the position of the contact piece 114 is fixed, so as to avoid the subsequent contact piece 114 contacting the roller shaft. When the trigger rod 163 reaches the third pressure sensor 168, it means that the contact sheet 114 has reached the area vertically tangent to the roller shaft, and the downward movement can be stopped to start detection. On this basis, when the trigger rod 163 contacts the third pressure sensor 168, the distance between the bottom of the contact plate 162 and the horizontal center line of the contact sheet 114 is the radius of the roller shaft, from which the distance between the contact plate 162 and the horizontal center line of the contact sheet 114 in the free state can be obtained. When detecting roller shafts of different diameters, according to the radius value of the roller shaft and the distance between the contact plate 162 and the horizontal center line of the contact sheet 114 in the initial state, the second screw 15 is rotated to drive the mounting sleeve 14 to move vertically, so as to adjust the initial position of the contact plate 162.

During the inspection, the roller rotates by itself, and the first screw rod 3 is driven to rotate by the motor, thereby driving the mounting head 4 and the mounting frame 6 to move, and the roller is inspected axially. During the inspection, the contact piece 114 contacts the outer side of the center of the roller. If the roller is in a state of dynamic imbalance, the contact piece 114 will be pushed to move, and the contact piece 114 will drive the inspection piston rod 113 to move, and the oil in the first oil chamber 111 will be squeezed into the bottom of the I-shaped rod 115, and the I-shaped rod 115 will move up and contact the first pressure sensor 117. The controller 2 receives the signal and controls the first screw rod 3 to stop rotating. The stopped position at this time is the position where the roller is unbalanced. Further, the force activity of the contact piece 114 drives the first piston rod 121 to move, and squeezes the oil in the second oil chamber 122, so that the second piston rod 123 drives the coloring head 124 to move toward the roller, and the paint on the coloring head 124 is applied to the corresponding area of the roller, so as to further confirm the unbalanced position of the roller.

The contents not described in detail in this specification belong to the prior art known to the professional and technical personnel in this field. In the description of the present invention, unless otherwise specified, "multiple" means two or more; the orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does 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 cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connected" 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 directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims (9)

1. The utility model provides a mechanical equipment rotation dynamic balance on-line monitoring device, includes rack (1), controller (2) are installed at the top of rack (1), and embedded rotation in the inboard cavity in controller (2) top installs first screw rod (3), threaded sleeve is equipped with installation head (4) on first screw rod (3), and the bottom of installation head (4) is connected with mounting bracket (6) through electric putter (5);

the method is characterized in that: the automatic color-coating device comprises a mounting rack (6), and is characterized by further comprising a positioning rod (7), wherein the positioning rod (7) is arranged in a cavity of the inner wall of the bottom of the mounting rack (6) in an embedded sliding manner, an electromagnet (8) is arranged at the top of the middle of the positioning rod (7), the electromagnet (8) is embedded and fixed in the mounting rack (6), a positioning head (9) is fixed at the extending part of the inner end of the positioning rod (7), a first elastic telescopic rod (10) is connected between the outer side of the positioning head (9) and the inner wall of the mounting rack (6), a detection assembly (11) and a color-coating assembly (12) are arranged in the positioning head (9), the detection assembly (11) is used for carrying out dynamic balance detection on a roller shaft, and the color-coating assembly (12) is used for coating the roller shaft;

The utility model provides a gag lever post (13), gag lever post (13) are fixed on mounting bracket (6) top inner wall, and the slip cap is equipped with installation cover (14) on gag lever post (13), one side thread bush of installation cover (14) is established on second screw rod (15), and second screw rod (15) rotate and set up on mounting bracket (6) top inner wall, the bottom and the inside of installation cover (14) are provided with position control subassembly (16), and position control subassembly (16) are used for fixing a position the position of locating head (9).

2. The on-line monitoring device for the rotational dynamic balance of mechanical equipment according to claim 1, wherein: the first screw rod (3) drives the mounting head (4) to slide in the cavity of the placement frame (1), and the first screw rod (3) is driven by a motor.

3. The on-line monitoring device for the rotational dynamic balance of mechanical equipment according to claim 1, wherein: the two locating rods (7) are symmetrically arranged at the bottom of the mounting frame (6), the middle parts of the locating rods (7) are magnetically adsorbed by the electromagnets (8) through metal materials, and the bottoms of the locating heads (9) at the inner ends of the locating rods (7) are designed to be of inclined structures.

4. The on-line monitoring device for the rotational dynamic balance of mechanical equipment according to claim 1, wherein: the detection assembly (11) comprises a first oil cavity (111), the first oil cavity (111) is formed in the inner wall of the positioning head (9), a detection piston rod (113) is connected in the first oil cavity (111) through a first spring (112), a contact piece (114) is fixed at the inner end of the detection piston rod (113), an I-shaped rod (115) is connected in the top cavity of the first oil cavity (111) through a second spring (116), a first pressure sensor (117) is arranged at the top of the I-shaped rod (115), and the first pressure sensor (117) is fixed on the top wall of the top cavity of the first oil cavity (111).

5. The on-line monitoring device for the rotational dynamic balance of mechanical equipment according to claim 4, wherein: the contact piece (114) is positioned in the middle of the positioning head (9), and the contact piece (114) and the inner wall of the positioning head (9) are positioned at the same horizontal plane.

6. The on-line monitoring device for the rotational dynamic balance of mechanical equipment according to claim 4, wherein: the color coating assembly (12) comprises a first piston rod (121), the first piston rod (121) is fixed at the top of the middle part of the detection piston rod (113), the first piston rod (121) is located in a second oil cavity (122), the second oil cavity (122) is formed in the positioning head (9), the second piston rod (123) is arranged at the top of the second oil cavity (122), the color coating head (124) is connected with the inner end of the second piston rod (123), and the color coating head (124) is embedded in the inner wall cavity of the positioning head (9) through a third spring (125).

7. The on-line monitoring device for the rotational dynamic balance of mechanical equipment according to claim 6, wherein: the rod part of the first piston rod (121) is designed to be in an L-shaped structure, and the second oil cavity (122) is designed to be in a U-shaped structure.

8. The on-line monitoring device for the rotational dynamic balance of mechanical equipment according to claim 1, wherein: the position control assembly (16) comprises a contact plate (162), the contact plate (162) is arranged at the bottom of the installation sleeve (14) through a second elastic telescopic rod (161), a trigger rod (163) is fixed at the top of the contact plate (162), the trigger rod (163) is arranged in a trigger cavity (164) in a sliding mode, the trigger cavity (164) is arranged at the bottom of the installation sleeve (14), a trigger head (166) and a second pressure sensor (167) are arranged in a cavity of the middle inner wall of the trigger cavity (164), the trigger head (166) is elastically and slidably installed in the cavity of the middle inner wall of the trigger cavity (164) through a fourth spring (165), and a third pressure sensor (168) is fixed at the top of the trigger cavity (164).

9. The on-line monitoring device for the rotational dynamic balance of mechanical equipment according to claim 8, wherein: the inner end bottom surface of the trigger head (166) is designed to be of an inclined structure, and the inner end inclined surface of the trigger head (166) corresponds to the top inclined surface of the trigger rod (163).