Belt transmission structure of explosion-proof centrifugal machine

Abstract

The utility model discloses a belt transmission structure of an explosion-proof centrifugal machine, which comprises a motor driving part and a rotor driven part, a motor shaft of an explosion-proof motor of the motor driving part is connected with a driving wheel, the explosion-proof motor is provided with a motor adjusting plate, the motor adjusting plate is connected with a motor mounting shaft, and the rotor driven part is connected with the motor mounting shaft. A tension spring hook is further arranged on the motor adjusting plate, a tension spring fixing shaft is matched with the tension spring hook through a tension spring, and the tension spring fixing shaft is arranged on the lower portion of the motor mounting shaft; the rotor driving part comprises a rotor driving head, a triangular plate and a driven wheel, one corner of the triangular plate is connected with the upper end of the motor mounting shaft, the driven wheel is arranged above the triangular plate and is in transmission connection with the driving wheel through a transmission belt, and the rotor driving head is arranged above the driven wheel. According to the utility model, a belt conveying structure is used, so that the rotating speed of the motor is not changed while the rotor obtains a higher rotating speed, the noise of the motor is not changed, and the requirement of the national standard on noise can be met.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifuges, in particular to a belt transmission structure of an explosion-proof centrifuge. Background Art

[0002] The existing explosion-proof centrifuges in laboratory centrifuges are mainly driven by direct drive. The maximum speed of the motor determines the maximum speed of the explosion-proof centrifuge, which is generally 8000r / min. There is a demand in the market for explosion-proof centrifuges with a maximum speed of more than 10000r / min. The existing solution is to customize explosion-proof motors with higher speeds.

[0003] Customizing explosion-proof motors with higher speeds requires higher performance from explosion-proof motors. The higher speed of the motor itself means that the noise of the motor will be greater, and it is difficult to meet the noise requirements of the national standard. A higher speed motor means that the motor has greater power and generates more heat, which will shorten the life of the motor and increase the failure rate.

[0004] In summary, the utility model adopts belt transmission. Through the different diameters of the two pulleys, different transmission ratios can be used, which can easily reach 1:1.5, thereby achieving a higher speed at the performance level of the existing motor. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model aims to provide a belt transmission structure for an explosion-proof centrifuge, which has a reasonable design and uses a belt transmission structure, so that the rotor can obtain a higher speed while the speed of the motor itself remains unchanged, and the noise of the motor itself will remain unchanged, which can meet the national standard requirements on noise.

[0006] In order to achieve the above-mentioned purpose, the utility model is realized through the following technical scheme: a belt transmission structure of an explosion-proof centrifuge, comprising a motor driving part and a rotor driven part, the motor driving part comprising an explosion-proof motor, a driving wheel, a motor mounting shaft, a motor adjusting plate, a tension spring fixed shaft and a tension spring hook, the motor shaft of the explosion-proof motor is connected to the driving wheel, a motor adjusting plate is arranged on the explosion-proof motor, the motor adjusting plate is connected to the motor mounting shaft, a tension spring hook is also arranged on the motor adjusting plate, the tension spring fixed shaft cooperates with the tension spring hook through a tension spring, and the tension spring fixed shaft is arranged at the lower part of the motor mounting shaft; the rotor driven part comprises a rotor driving head, a triangular plate and a driven wheel, one corner of the triangular plate is connected to the upper end of the motor mounting shaft, a driven wheel is arranged above the triangular plate, the driven wheel is connected to the driving wheel through a transmission belt, and a rotor driving head is arranged above the driven wheel.

[0007] Preferably, the motor mounting shaft is fixedly connected to the triangular plate of the rotor driven part by means of a bolt interference fit.

[0008] Preferably, the motor adjustment plate and the motor are fastened together by hexagonal screws.

[0009] Preferably, the motor adjustment plate is inserted into the motor mounting shaft and then inserted into the tension spring fixing shaft for positioning and fixing.

[0010] Preferably, the tension spring hook is fixed on the motor adjustment plate by threaded engagement.

[0011] Preferably, the rotating shaft of the explosion-proof motor is interference fit with the inner hole of the driving wheel.

[0012] Preferably, the rotor driving head is fastened to the triangular plate by means of hexagon socket screws.

[0013] Preferably, the driven wheel is fixedly connected to the rotor driving head via a hexagon socket screw.

[0014] The beneficial effects of the utility model: the utility model has a reasonable structural design and uses a belt transmission structure, which can make the rotor obtain a higher speed while the speed of the motor itself remains unchanged, and the noise of the motor itself will remain unchanged, which can meet the national standard requirements on noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is described in detail below with reference to the accompanying drawings and specific implementation methods;

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the motor drive part of the utility model;

[0018] Figure 3 It is a schematic diagram of the rotor driven part of the utility model;

[0019] Figure 4 It is a schematic diagram of the principles of motor position adjustment and belt tension adjustment of the utility model. DETAILED DESCRIPTION

[0020] 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 described below in conjunction with specific implementation methods.

[0021] Reference Figure 1, this specific embodiment adopts the following technical scheme: a belt transmission structure of an explosion-proof centrifuge, including a motor driving part and a rotor driven part, the two parts are fixedly connected by a motor rotating shaft, and the transmission performance is ensured by a transmission belt and a tension spring. The motor driving part includes an explosion-proof motor 1, a driving wheel 2, a motor mounting shaft 3, a motor adjustment plate 4, a tension spring fixed shaft 5 and a tension spring hook 6, the motor shaft of the explosion-proof motor 1 is connected to the driving wheel 2, the explosion-proof motor 1 is provided with a motor adjustment plate 4, the motor adjustment plate 4 is connected to the motor mounting shaft 3, the motor adjustment plate 4 is also provided with a tension spring hook 6, the tension spring fixed shaft 5 cooperates with the tension spring hook 6 through a tension spring 11, and the tension spring fixed shaft 5 is arranged at the lower part of the motor mounting shaft 3; the rotor driven part includes a rotor driving head 7, a triangular plate 8 and a driven wheel 9, one corner of the triangular plate 8 is connected to the upper end of the motor mounting shaft 3, a driven wheel 9 is arranged above the triangular plate, the driven wheel 9 is connected to the driving wheel 2 through a transmission belt 10, and a rotor driving head 7 is arranged above the driven wheel 9.

[0022] The working principle of this specific implementation is: the main shaft of the explosion-proof motor rotates, driving the driving wheel to rotate, the driving wheel drives the driven wheel to rotate through the belt, and the driven wheel drives the rotor driving head to rotate. During operation, the driving wheel is subjected to the clockwise rotation force transmitted by the belt and the counterclockwise rotation force transmitted by the tension spring, and the two forces reach a balance.

[0023] like Figure 1 As shown in the figure, the belt drive structure consists of two parts, the left side is the motor drive part, and the right side is the rotor driven part. The two parts are connected together through the motor mounting shaft and the transmission belt.

[0024] like Figure 2 The figure shows the transmission part of the rotor, which consists of a rotor drive head, a triangular plate, and a driven wheel. The rotor drive head is fastened to the triangular plate by a hexagon socket screw. The triangular plate is a fixed component. The driven wheel is fixed to the rotor drive head by a hexagon socket screw. After installation, the rotor driven component is fixed and cannot be moved.

[0025] like Figure 3 The figure shows a schematic diagram of the motor drive component, which is mainly composed of an explosion-proof motor, a drive wheel, a motor mounting shaft, a motor adjustment plate, a tension spring fixed shaft and a tension spring hook. The motor mounting shaft is fixedly connected to the triangular plate of the rotor driven structure by a bolt interference fit. The motor adjustment plate and the motor are fastened together by an external hexagonal screw. The motor adjustment plate is inserted into the motor mounting shaft and then inserted into the tension spring fixed shaft for positioning and fixing, connecting the drive and driven structures together. The tension spring hook is fixed to the motor adjustment plate by threaded fit. The rotating shaft of the explosion-proof motor is fixedly connected to the inner hole of the drive wheel by an interference fit. The motor mounting shaft is fixed to the triangular plate, and the tension spring hook is fixedly connected to the motor adjustment plate by threaded fit. After installation, the position of the motor mounting shaft is fixed, and the explosion-proof motor can rotate around the motor mounting shaft.

[0026] like Figure 4 The diagram shows the principle of motor position adjustment and belt tension adjustment. The explosion-proof motor and the motor adjustment board mainboard are fixed together and can rotate around the motor mounting shaft together with the motor adjustment board mainboard. The tension spring hook is connected to the tension spring fixed shaft by a tension spring. When installing the belt, first rotate the motor clockwise by a certain angle to reduce the distance between the driving wheel and the driven wheel. At this time, the belt can be easily installed. Then rotate the explosion-proof motor counterclockwise and use the tension spring to connect the tension spring hook to the tension spring fixed shaft. At this time, the driving wheel is subjected to the clockwise rotation force transmitted by the belt and the counterclockwise rotation force transmitted by the tension spring, and the two forces are balanced. The tension of the belt is different when the equipment is running and stationary. The tension is small when it is stationary and large when it is running. It can not only ensure the stability of the speed error within 0.1%, but also extend the service life of the belt.

[0027] The transmission ratio between the driving wheel and the driven wheel is determined by the diameter ratio of the driving wheel and the driven wheel. The diameter ratio used in this solution is to adjust the belt tightness by the segment plate to obtain the most suitable belt transmission force. By modifying the diameter of the driving wheel and the driven wheel, the transmission ratio can be changed to 9:4. The explosion-proof motor with a maximum speed of 10000r / min can drive the rotor to a maximum speed of 22500r / min, which greatly expands the scope of use of the explosion-proof motor.

[0028] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A belt transmission structure of an explosion-proof centrifuge, characterized in that: The invention comprises a motor driving part and a rotor driven part, wherein the motor driving part comprises an explosion-proof motor (1), a driving wheel (2), a motor mounting shaft (3), a motor adjusting plate (4), a tension spring fixing shaft (5) and a tension spring hook (6), wherein the motor shaft of the explosion-proof motor (1) is connected to the driving wheel (2), the explosion-proof motor (1) is provided with a motor adjusting plate (4), the motor adjusting plate (4) is connected to the motor mounting shaft (3), the motor adjusting plate (4) is also provided with a tension spring hook (6), the tension spring fixing shaft ( 5) through the tension spring (11) and the tension spring hook (6), the tension spring fixing shaft (5) is arranged at the lower part of the motor installation shaft (3); the rotor driven part includes a rotor driving head (7), a triangular plate (8) and a driven wheel (9), one corner of the triangular plate (8) is connected to the upper end of the motor installation shaft (3), a driven wheel (9) is arranged above the triangular plate, the driven wheel (9) is connected to the driving wheel (2) through a transmission belt (10), and a rotor driving head (7) is arranged above the driven wheel (9).

2. The belt transmission structure of an explosion-proof centrifuge according to claim 1, characterized in that: The motor installation shaft (3) is fixedly connected to the triangular plate (8) of the rotor driven part by means of bolt interference fit.

3. The belt transmission structure of an explosion-proof centrifuge according to claim 1, characterized in that: The motor adjustment plate (4) is fastened together with the motor via external hexagonal screws.

4. The belt transmission structure of an explosion-proof centrifuge according to claim 1, characterized in that: The motor adjustment plate (4) is inserted into the motor installation shaft (3) and then inserted into the tension spring fixing shaft (5) for positioning and fixing.

5. The belt transmission structure of an explosion-proof centrifuge according to claim 1, characterized in that: The tension spring hook (6) is fixed on the motor adjustment plate (4) through threaded engagement.

6. The belt transmission structure of an explosion-proof centrifuge according to claim 1, characterized in that: The rotating shaft of the explosion-proof motor (1) and the inner hole of the driving wheel (2) are interference fit.

7. The belt transmission structure of an explosion-proof centrifuge according to claim 1, characterized in that: The rotor driving head (7) is fastened to the triangular plate (8) by means of hexagon socket screws.

8. The belt transmission structure of an explosion-proof centrifuge according to claim 1, characterized in that: The driven wheel is fixedly connected to the rotor driving head (7) via a hexagon socket screw.

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