Centrifugal machine driving unbalance detection device

Abstract

The utility model relates to the technical field of centrifugal machines, and particularly discloses a centrifugal machine driving imbalance detection device which comprises a mounting part, a driving part and a driving part, and the mounting part is used for being connected with a centrifugal machine rotating head; the connecting piece is used for being installed on the sealing sleeve; the mounting arm is mounted on the sealing sleeve through a connecting piece, and an acceleration sensor is detachably mounted at the tail end, away from the connecting piece, of the mounting arm; when the centrifugal machine is driven to swing, the connecting piece installed on the surface of the sealing sleeve can generate weak displacement S1 and generate small acceleration, and the installation section located in the installation arm can generate larger displacement S2 within the same time, that is, the installation section on the installation arm can generate larger acceleration. According to the equipment, the accelerated speed generated by the centrifugal driving mechanism due to swinging is effectively amplified through the mounting arm, so that the swinging generated by the centrifugal machine can be effectively detected, and the safety and the reliability of the centrifugal machine are enhanced.

Description

TECHNICAL FIELD

[0001] The utility model relates to centrifuge technical field, concretely relates to a centrifuge drive unbalance detection device. BACKGROUND

[0002] Centrifuge is the equipment of using centrifugal force to separate solid or liquid of different specific gravity, and is widely used in industry, agriculture and scientific research etc.

[0003] The generation of centrifugal force in centrifuge completely relies on the high speed rotation of drive, so its drive requires high stability, when the drive appears swing or other unbalance phenomenon, then may lead to experiment failure or cause more serious damage. Therefore, the unbalance detection device needs to be installed in centrifuge to detect the unbalance amount of drive at any time, when the unbalance amount is too large, can stop running in time, protects experiment sample, centrifuge and operating personnel, and avoids causing greater loss. UTILITY MODEL CONTENTS

[0004] In view of the deficiency of prior art, the utility model provides a centrifuge drive unbalance detection device.

[0005] The centrifuge drive unbalance detection device of the utility model includes:

[0006] The mounting portion is used to be connected with the centrifuge head;

[0007] The transmission shaft is installed between the mounting portion and the motor;

[0008] The sealing kit includes a sealing sleeve and a rubber sealing sleeve, the sealing sleeve is arranged on the surface of the transmission shaft, and the rubber sealing sleeve is sleeved on the surface of the sealing sleeve;

[0009] The connecting piece is used to be installed on the sealing sleeve;

[0010] The mounting arm is installed on the sealing sleeve through the connecting piece, and the end of the mounting arm away from the connecting piece is detachably installed with an acceleration sensor.

[0011] Further, the rubber sealing sleeve includes a tapered portion, the tip of the tapered portion is fixedly connected with the surface of the sealing sleeve, the bottom of the tapered portion extends outward horizontally to form a fitting portion, and the fitting portion is used to fit with the centrifuge shell.

[0012] Further, the tapered portion of the rubber sealing sleeve forms an installation cavity on the surface of the sealing sleeve for installing the connecting piece, and the mounting arm carrying the acceleration sensor is installed below the rubber sealing sleeve;

[0013] The length of the mounting arm in plan view is less than the length of the rubber sealing sleeve in plan view.

[0014] Further, the mounting arm comprises an extension section, a parallel section and a mounting section in sequence, the extension section is vertically mounted on the surface of the sealing sleeve through a connecting piece, the parallel section is located at the end of the extension section and is arranged in parallel with the surface of the tapering part, and the mounting section is mounted in parallel on the bottom of the fitting part and is used for mounting the acceleration sensor.

[0015] Further, the connecting piece is mounted at the center of the inner wall of the sealing sleeve in the mounting cavity.

[0016] Further, the connecting piece is an arc-shaped plate which is detachably connected with the sealing sleeve through screws.

[0017] Compared with the prior art, the centrifuge has the advantages that:

[0018] When the centrifuge drive swings, the connecting piece mounted on the surface of the sealing sleeve will be slightly displaced S1 and generate a small acceleration, and the mounting section in the mounting arm will be displaced S2 more at the same time, that is, the mounting section on the mounting arm will generate a larger acceleration, that is, the device effectively amplifies the acceleration generated by the swing of the centrifuge drive mechanism, so that the swing of the centrifuge can be effectively detected, thereby enhancing the safety and reliability of the centrifuge. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings, which are included to provide a further understanding of the application and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

[0020] Figure 1 It is a structure schematic view of the connecting piece mounted on the centrifuge drive of the utility model;

[0021] Figure 2 It is a front view half-section structure schematic view of the utility model;

[0022] Figure 3 It is a structure schematic view of the utility model when detecting.

[0023] In the drawings: 1, connecting piece; 2, mounting arm; 21, extension section; 22, parallel section; 23, mounting section;

[0024] 3, acceleration sensor;

[0025] 4, mounting part; 5, transmission shaft;

[0026] 6, sealing sleeve set; 61, sealing sleeve; 62, rubber sealing sleeve; 621, tapering part; 622, fitting part;

[0027] 7, mounting cavity. DETAILED DESCRIPTION

[0028] A number of embodiments of the present application will be described below with reference to the drawings. For the purpose of explanation, numerous specific details are set forth in the following description. It should be appreciated that these specific details are not intended to limit the present application. Rather, the specific details are presented in order to provide a thorough understanding of the present application. For the purpose of simplicity and clarity, detailed descriptions of well-known methods, procedures, components, and circuits will not be included herein in order to avoid obscuring the present application.

[0029] In addition, the terms "first", "second", and the like, as used in the description and the claims, are used for distinguishing between similar elements and not necessarily for describing a sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of use in either order. It is therefore intended that the following detailed description of the application be not limited in scope by the foregoing merely by way of example, as properly understood by those having ordinary skill in the art. Any relative terms will be construed in the context of the application as a whole. The individual features of the embodiments can also be combined in other combinations than presented in the examples without departing from the scope of the application.

[0030] Reference will now be made to Figure 1 Figure 3 The centrifuge driving unbalance detection device of the present application comprises:

[0031] The mounting portion 4 is used for connecting with the centrifuge rotor;

[0032] The transmission shaft 5 is installed between the mounting portion 4 and the motor;

[0033] The sealing assembly 6 comprises a sealing sleeve 61 and a rubber sealing sleeve 62. The sealing sleeve 61 is arranged on the surface of the transmission shaft 5. The rubber sealing sleeve 62 is arranged on the surface of the sealing sleeve 61, and is used for protecting the motor below the transmission shaft 5, so as to prevent the centrifugal sample from leaking into the motor and damaging the motor;

[0034] The connecting piece 1 is used for being installed on the sealing sleeve 61;

[0035] The mounting arm 2 is installed on the sealing sleeve 61 through the connecting piece 1, and the end of the mounting arm 2 away from the connecting piece 1 is detachably installed with the acceleration sensor 3.

[0036] ​The rubber sealing sleeve 62 includes a tapered portion 621, the tip of which is fixedly connected to the surface of the sealing sleeve 61, and the bottom of the tapered portion 621 extends outward horizontally to form a fitting portion 622, which is used to fit with the centrifuge housing.

[0037] The tapered portion 621 of the rubber sealing sleeve 62 forms an installation cavity 7 on the surface of the sealing sleeve 61 for installing the connector 1. The mounting arm 2 carrying the acceleration sensor 3 is installed below the rubber sealing sleeve 62; and the top-view projection length of the mounting arm 2 is less than the top-view projection length of the rubber sealing sleeve 62.

[0038] The mounting arm 2 includes an extension section 21, a parallel section 22, and a mounting section 23. The extension section 21 is vertically mounted on the surface of the sealing sleeve 61 via a connector 1. The parallel section 22 is located at the end of the extension section 21 and is parallel to the surface of the tapered portion 621. The mounting section 23 is mounted parallel to the bottom of the mating portion 622 and is used to mount the acceleration sensor 3.

[0039] The connector 1 is installed in the center of the inner wall of the sealing sleeve 61 in the installation cavity 7.

[0040] The connector 1 is an arc-shaped plate, which is detachably connected to the sealing sleeve 61 by screws.

[0041] Working principle:

[0042] When the centrifuge drive swings, the connector 1 mounted on the surface of the sealing sleeve 61 will undergo a slight displacement S1 and generate a small acceleration, while the mounting section 23 located in the mounting arm 2 will undergo a larger displacement S2 in the same time. That is, the mounting section 23 on the mounting arm 2 will generate a larger acceleration. In other words, the device effectively amplifies the acceleration generated by the swing of the centrifuge drive mechanism through the mounting arm 2, so that the swing generated by the centrifuge can be effectively detected, thereby enhancing the safety and reliability of the centrifuge.

[0043] By making the mounting arm 2 consist of an extension section 21, a parallel section 22, and a mounting section 23, the mounting cavity 7 generated by the conical part 621 in the rubber sealing sleeve 62 can be effectively utilized, so that the installation of the imbalance detection device does not require modification of the centrifuge drive, and it can be used on a centrifuge drive mechanism with a rubber sealing sleeve 62.

[0044] Furthermore, since the connector 1 is installed inside the mounting cavity 7 formed by the rubber sealing sleeve 62, the mounting arm 2 and the acceleration sensor 3 of the device are both located in the lower half of the centrifuge drive, meaning that the installation of the device will not affect the overall balance of the centrifuge drive.

[0045] When the centrifuge drive becomes unbalanced, the connector 1 mounted on the surface of the sealing sleeve 61 will experience a radial displacement S1, while the mounting section 23 located in the mounting arm 2 will experience a larger displacement S2 within the same time period. This is calculated using the acceleration-displacement formula when the initial velocity is 0:

[0046] S = 1 / 2at 2

[0047] In the formula: S is displacement, a is acceleration, and t is time.

[0048] When time is constant, acceleration is directly proportional to displacement. During the operation of the imbalance detection device, S2 is several times greater than S1 (the specific multiple is related to the length H of the imbalance detection device), that is, the acceleration at the tail of the imbalance detection device is amplified by the same multiple, which improves the detection accuracy and effect of the acceleration sensor.

[0049] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made to the spirit and principles of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A centrifuge drive imbalance detection device, characterized in that, Including: Mounting part (4), which is used to connect to the centrifuge rotor; A drive shaft (5) is installed between the mounting part (4) and the motor; A sealing kit (6) includes a sealing sleeve (61) and a rubber sealing sleeve (62). The sealing sleeve (61) is disposed on the surface of the drive shaft (5). The rubber sealing sleeve (62) is fitted on the surface of the sealing sleeve (61). A connector (1) is used to be installed on a sealing sleeve (61); Mounting arm (2), which is mounted on sealing sleeve (61) via connector (1), and an acceleration sensor (3) is detachably mounted at the end of mounting arm (2) away from connector (1).

2. The centrifuge drive imbalance detection device according to claim 1, characterized in that: The rubber sealing sleeve (62) includes a tapered portion (621), the tip of which is fixedly connected to the surface of the sealing sleeve (61), and the bottom of which extends outward horizontally to form a fitting portion (622), which is used to fit with the centrifuge housing.

3. The centrifuge drive imbalance detection device according to claim 2, characterized in that: The tapered portion (621) of the rubber sealing sleeve (62) forms an installation cavity (7) for installing the connector (1) on the surface of the sealing sleeve (61), and the mounting arm (2) carrying the acceleration sensor (3) is installed below the rubber sealing sleeve (62). The top-view projection length of the mounting arm (2) is less than the top-view projection length of the rubber sealing sleeve (62).

4. The centrifuge drive imbalance detection device according to claim 3, characterized in that: The mounting arm (2) includes an extension section (21), a parallel section (22), and a mounting section (23) in sequence. The extension section (21) is vertically mounted on the surface of the sealing sleeve (61) via a connector (1). The parallel section (22) is located at the end of the extension section (21) and is parallel to the surface of the tapered portion (621). The mounting section (23) is mounted parallel to the bottom of the mating portion (622) and is used to mount the acceleration sensor (3).

5. A centrifuge drive imbalance detection device according to claim 4, characterized in that: The connector (1) is installed in the center of the inner wall of the sealing sleeve (61) in the installation cavity (7).

6. The centrifuge drive imbalance detection device according to claim 5, characterized in that: The connector (1) is an arc-shaped plate, which is detachably connected to the sealing sleeve (61) by screws.

Images