CN102494839B - Self-balancing large range torque calibrating device - Google Patents

Abstract

The invention discloses a self-balancing large-range torque calibration device, which comprises a loading beam assembly, a table top assembly, a fixed beam assembly, a base, a standard force loading system and an adapter flange. The loading mode designed by the present invention makes the loading load of the large-range torque and its reaction load act on the table through the standard force loading system, thereby completing the calibration work of the large-range torque sensor. The invention avoids the traditional method of loading with weights and the defects of complex foundation engineering caused by the self-weight of the calibration device on the ground. The on-site static torque of the present invention is calibrated to 60KNm, and the linearity and repeatability errors of torque incremental calibration are both less than 0.1%.

Description

A self-balancing large-range torque calibration device

technical field

The invention belongs to the technical field of torque calibration, in particular to a self-balancing torque calibration device with a measuring range greater than 5KNm. the

Background technique

The torque calibration device is an important instrument for testing the accuracy of the torque sensor. Any torque sensor can only be used normally after being calibrated. the

Existing torque calibration machines mainly adopt the form of weight loading, and the general structure is shown in Figure 1, which is mainly composed of a calibration machine base, a fixed end, a loading beam support, a loading beam and loading weights. At present, the torque calibration machine used in China can only calibrate the maximum torque value of 5KNm. This is because, according to the calculation principle of torque: when the moment arm is 1m, it is necessary to load about 500kg of weight to provide 5KNm torque. When it is necessary to calibrate a torque value of 10KNm or more, the required weights will be doubled, which will greatly increase the manufacturing cost of the calibration machine and the construction cost of the foundation, and also cause inconvenience in transportation. the

In recent years, with the rapid development of large heavy industries such as petroleum, high-speed rail, and ships in my country, it is necessary to accurately measure large torques in more and more fields. In recent years, torque sensors with a large range of 12KNm, 100KNm, 80KNm, and 60KNm have been designed and manufactured successively. However, due to the limitation of the calibration machine, only the torque measurement value below 5KNm can be calibrated, that is to say, when measuring the torque above 5KNm , the user calculates it through the calibration value below 5KNm, and the error of the calculation result will become larger and larger with the increase of the measuring range, and it is unmeasurable. the

In addition, some industries have developed simple large-range torque calibration devices due to the needs of actual use. However, such devices are often adapted to local conditions and can only use existing equipment or foundations as supports to generate the same reaction force as the loading force on the ground. , its force value may be as high as 100KN, so the foundation needs to be reinforced. Moreover, this type of device cannot be transported, and can only calibrate a single torque sensor, which is not universal. the

Contents of the invention

The purpose of the present invention is to overcome the deficiencies of the prior art and provide a high-precision, self-balancing and large-range torque calibration device. the

The technical solution of the present invention is a self-balancing large-range torque calibration device, including a loading beam assembly, a table top assembly, a fixed beam assembly, a standard force loading system and a base; the loading beam assembly includes a loading beam, a support rod, The supporting rod frame, the anchor seat and the anchor seat pin; the anchor seat is fixed on the loading beam through the anchor seat pin, and the supporting rod and the supporting rod frame support the loading beam on the table assembly; the table assembly includes a table, a mounting plate, Transfer flange, bearing seat and support rod base; after the sensor to be tested is embedded in the bearing seat, it is fixed on the mounting plate through the transfer flange, the mounting plate is fixed on the table, and the support rod base is used to support the loading beam assembly; the fixing The beam assembly includes a fixed beam, a fixed beam base and a fixed beam pin; the fixed beam and the fixed beam base are connected by the fixed beam pin, and the fixed beam base is fixed on the table with bolts; Connected with the fixed beam; the standard force loading system is composed of a standard force sensor, display instrument, steel wire rope, anchorage, oil cylinder and manual oil pump; the standard force sensor is fixed under the table, and one end of the wire rope is locked through the anchorage and the anchorage seat On the loading beam, the other end passes through the table, the standard force sensor and the oil cylinder in sequence and is locked with an anchor. the

The base is composed of a profile frame and feet, and the profile frame is placed on the ground through the feet to fix and support the whole machine of the calibration device. the

The loading end of the loading beam is arc-shaped with the center of the beam as the center. the

The sensor to be tested is embedded in the bearing seat through the shaft sleeve. the

The bottom of the table top is welded into a frame structure with section steel to ensure that the deformation of its strength is less than 2mm when loaded. the

Compared with the existing torque calibration device, the present invention has the following advantages and beneficial effects:

1. The present invention designs a set of brand-new loading methods, using a flexible steel wire rope as the medium of force transmission, so that both the loading force and its reaction force act on the table. The overall external force on the torque calibration device, that is, the pressure on the ground is only the self-weight of the calibration device itself. For example, the pressure on the ground generated by the torque calibration device with a range of 100KNm is only about 8KN, which is less than half of the existing 5000KNm torque calibration machine. . Therefore, the present invention does not need the necessary heavy fuselage and complex foundation engineering of general calibration machines, and can greatly save manufacturing, installation and transportation costs. the

2. Due to the gap between the bolts and the deformation after loading, the loading beam will rotate at a small angle. The loading end of the loading beam of the present invention adopts a circular arc design, and a flexible and rigid steel wire rope is selected as the device for transmitting force , which can effectively avoid errors caused by rotational deformation during loading, and ensure the accuracy of the standard torque applied to the sensor under test. the

Description of drawings

Fig. 1 is the structural representation of existing torque calibration machine;

Fig. 2 overall structure schematic diagram of the present invention;

Fig. 3 is a bottom view of the present invention. the

Detailed ways

The present invention will be further described below in conjunction with accompanying drawing. the

As shown in Figures 2 and 3, a self-balancing large-range torque calibration device of the present invention includes a loading beam assembly, a table top assembly, a fixed beam assembly, a standard force loading system and a base. the

The loading beam assembly includes a loading beam 1, a support rod 2, a support rod frame 3, an anchor seat 4 and an anchor seat pin 5; the anchor seat 4 is fixed on the loading beam 1 through the anchor seat pin 5, and the support bar 2 and the support The rod frame 3 supports the loading beam 1 on the table assembly. the

The countertop assembly includes a countertop 6, a mounting plate 7, an adapter flange 8, a bearing seat 9 and a support rod base 10; after the sensor to be tested is embedded in the bearing seat 9, it is fixed on the mounting plate 7 through the adapter flange 8, and the mounting plate 7 is fixed On the deck 6, a support bar mount 10 is used to support the load beam assembly. the

The fixed beam assembly comprises a fixed beam 11, a fixed beam base 12 and a fixed beam pin 13; the fixed beam 11 and the fixed beam base 12 are connected by the fixed beam pin 13, and the fixed beam base 12 is fixed on the table 6 with bolts; The ends are respectively connected with the loading beam 1 and the fixed beam 11 through the adapter flange 8. the

The standard force loading system consists of a standard force sensor 16, a display instrument 17, a wire rope 18, an anchor 19, an oil cylinder 20 and a manual oil pump 21. The standard force sensor 16 is fixed below the table 6, one end of the wire rope 18 is locked on the loading beam 1 through the anchor 19 and the anchor seat 4, and the other end passes through the table 6, the standard force sensor 16 and the oil cylinder 20 successively, and then the anchor is used. 19 is locked. the

The loading end of the loading beam 1 is in the shape of an arc with the center of the beam as the center. The sensor to be tested is embedded in the bearing seat 9 through the shaft sleeve. the

In this embodiment, the bottom of the table top 6 is welded with section steel to form a frame-shaped structure, so as to ensure that the deformation of its strength during loading is less than 2 mm. the

In this embodiment, the base is composed of profile frame 14 and foundation feet 15 . The profile frame 14 is placed on the ground through the feet 15, and is used for fixing and supporting the whole machine of the calibration device. the

During calibration, the manual oil pump 21 is used to load the oil cylinder 20 to lift the anchorage 19 downward, and the downward pulling force is applied to the loading beam 1 through the steel wire rope 18 . Because the bottom of the oil cylinder 20 acts on the standard force sensor 16, the loaded standard force value can be displayed by the display instrument 17 matched with the standard force sensor 16, and the product of the force value and the moment arm is the applied standard torque. the

After testing, the on-site static torque of this embodiment is calibrated to 60KNm, the linearity and repeatability of torque incremental calibration are good, and the error is less than 0.1%. the

In actual use, the corresponding shaft sleeve and the inner sleeve of the adapter flange 8 can be designed according to the size of the sensor to be tested, so that the present invention is applicable to sensors to be tested with different lengths, shaft diameters and heights. the

Of course, the equivalent transformation or replacement of each component, positional relationship and connection method of the present invention without changing its function also falls within the protection scope of the present invention. the

Parts of the present invention that are not described in detail as shown in the present invention belong to the common knowledge of those skilled in the art. the

Claims (3)

1. a self-equilibrating wide range torque calibrating device is characterized in that: comprise loading beam assembly, table-board components, fixed beam assembly, proof force loading system and base;

Described loading beam assembly comprises loading beam (1), support bar (2), bracing member (3), ground tackle seat (4) and ground tackle seat pin nail (5); Ground tackle seat (4) is fixed on the loading beam (1) by ground tackle seat pin nail (5), and support bar (2) and bracing member (3) are supported on loading beam (1) on the table-board components;

Described table-board components comprises table top (6), installing plate (7), adapter flange (8), bearing seat (9) and support bar base (10); Be fixed on the installing plate (7) by adapter flange (8) after the sensor embedded axle bearing to be measured (9), installing plate (7) is fixed on the table top (6), and support bar base (10) is used for the supporting loading beam assembly;

Described fixed beam assembly comprises fixed beam (11), fixed beam base (12) and fixed beam pin (13); Fixed beam (11) connects by fixed beam pin (13) with fixed beam base (12), and fixed beam base (12) is fixed on the table top (6); Sensor to be measured two ends connect with loading beam (1) and fixed beam (11) respectively by adapter flange (8);

Described proof force loading system is comprised of proof force sensor (16), Displaying Meter (17), wire rope (18), ground tackle (19), oil cylinder (20) and hand oil pump (21); Proof force sensor (16) is fixed on table top (6) below, one end of wire rope (18) is locked on the loading beam (1) by ground tackle (19) and ground tackle seat (4), and the other end is locked with ground tackle (19) after passing successively table top (6), proof force sensor (16) and oil cylinder (20);

Described base is comprised of section material framework (14) and lower margin (15), and section material framework (14) places on the ground by lower margin (15), is used for fixed support caliberating device complete machine;

Circular-arc for take the center of beam as the center of circle of the loading end of described loading beam (1).

2. according to claim 1 a kind of self-equilibrating wide range torque calibrating device, it is characterized in that: described sensor to be measured is by axle sleeve embedded axle bearing (9).

3. according to claim 1 a kind of self-equilibrating wide range torque calibrating device, it is characterized in that: the bottom of described table top (6) is connected into frame-shaped construction with steel welding, guarantees that distortion that its intensity produces when loading is less than 2mm.

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