A frame type belt temperature loading test device

Abstract

The application relates to the technical field of comprehensive test equipment, and particularly discloses a frame type temperature loading test device which comprises a chassis, an environmental temperature box is arranged on the chassis, three pull rods are transversely embedded in the environmental temperature box, the two ends of the three pull rods are fixed through fixing plates, a product mounting platform is arranged in the environmental temperature box, first and second guide support plates are respectively arranged on the two sides of the product mounting platform, a servo loading cylinder is installed on the chassis, a piston rod of the servo loading cylinder is fixedly connected with the second guide support plate, a tension sensor and a displacement sensor are installed on the chassis at the left side of the environmental temperature box, a probe of the tension sensor penetrates through the middle part of the first guide support plate, and the displacement sensor is connected with the second guide support plate. The application has the advantages of stable and reliable structure, convenient dismounting and maintenance, simulation of complex working conditions, high control precision, long service life, realization of dynamic loading test of hydraulic components under different environmental temperatures, and wide application.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of comprehensive test equipment, and particularly relates to a frame type temperature loading test device. BACKGROUND

[0002] The hydraulic actuator converts the hydraulic pressure of the hydraulic source into corresponding motion state through mechanical structure, and drives the end component to perform corresponding action. In the traditional case, the performance of the hydraulic component is usually evaluated by separate examination of different performances, the sealing performance of the hydraulic test piece is verified by high and low pressure reciprocating cycle test, and the maximum output force of the hydraulic component is verified by load application. In order to simulate the accelerated failure of the hydraulic product at different temperatures, the environmental temperature test is usually carried out separately.

[0003] Splitting each test condition to carry out test separately plays a very important role in verifying the hydraulic product before delivery. However, the splitting of each test type prolongs the test period, which leads to the delay of product delivery time. At the same time, the balance between over-examination and under-examination needs to be considered when different types of tests are carried out. On the other hand, the hydraulic product is installed in the whole device after delivery, and the influencing factors in the running process are often complex and dynamic. The coupling effect of various factors such as external load, temperature change and motion speed makes it difficult to completely reproduce the real working condition of the hydraulic product by single condition test, so it is difficult to effectively examine the hydraulic product.

[0004] The process of external load work of the hydraulic product is often not static, and the size of the external load is also not fixed. Therefore, the motion speed and external load of the hydraulic product are variable in different working stages of different devices. The complex working condition and dynamic alternating load are more accurate for verifying the service life of the hydraulic product. However, to simulate the complex working condition of the hydraulic component, the requirement for the test device is higher. SUMMARY

[0005] The present application aims to provide a frame type temperature loading test device with good stability, which can provide the environmental temperature and humidity requirements of the test process, and realize the complex working condition of the multi-condition coupling test.

[0006] The application is realized by the technical scheme as follows: a frame type belt temperature loading test device, comprising a chassis, an environmental temperature box is arranged on the upper part of the chassis, three pull rods are transversely embedded in the environmental temperature box, the two ends of the three pull rods respectively extend out of the environmental temperature box through a fixing plate, a product mounting platform is arranged in the space formed by the three pull rods in the environmental temperature box, the two ends of the three pull rods on the two sides of the product mounting platform are respectively provided with a first guide support plate located on the left side in the environmental temperature box and a second guide support plate located on the right side in the environmental temperature box, a servo loading cylinder is installed on the chassis outside the right side of the environmental temperature box, the piston rod of the servo loading cylinder extends leftwards through the middle part of the second guide support plate and is fixedly connected with the second guide support plate, a tension sensor and a displacement sensor are installed on the chassis outside the left side of the environmental temperature box, the probe of the tension sensor extends rightwards through the middle part of the first guide support plate, and the displacement sensor extends rightwards to the second guide support plate and is connected with the second guide support plate.

[0007] The working principle of the technical scheme is that three pull rods and two fixing plates are used as the main support structure, an environmental temperature box is arranged in the middle part, and a test piece is mounted on a product mounting platform in the environmental temperature box for testing. The triangle has stability, the three-frame structure can resist large torsional moments and tensile and compressive load, and has better stability in a long-term test process. The product mounting platform is located between the three pull rods, so that a large operation space is reserved for disassembly and assembly of the test piece and later maintenance of the equipment, and the later use process is more convenient. The test piece is connected with the servo loading cylinder piston cylinder for reciprocating movement, and the displacement sensor can collect displacement data in real time. Through accurate collection and control of the loading force and displacement signals, the test requirements of product dynamic displacement and loading force can be met in the same test device. At the same time, the environmental temperature box can also provide the environmental temperature and humidity requirements in the test process, and realize the complex working conditions of multi-condition coupling test. In addition, the most important of the test equipment is its detection accuracy, the higher the accuracy of the sensor, the higher the requirement of the environment, and the change of the environmental temperature will greatly affect the collection accuracy and service life of the sensor. Since the test piece is mounted in the environmental temperature box, the limit temperature working condition in the environmental temperature box is not suitable for installing the sensor, so the collection module of the tension and pressure sensor and the displacement sensor is external, which can greatly improve the collection accuracy and service life of the sensor. The tension and pressure sensor fixed to the fixing plate is connected with the test product through a connecting tool at the other end, the support plate is fixed between the two pull rods, and is used to ensure that the load is concentric after the tension and pressure sensor is connected with the test piece, so that eccentric load is not generated. The product mounting platform can be operated to lift, and assist in precise installation of the test piece. The servo loading cylinder is fixed to the other side of the frame baffle, the piston rod is connected with the other end of the test piece through a guide support and a connecting tool, and the limiting constraint of the test piece is realized. The external servo loading cylinder can greatly reduce the aging failure of the sealing structure in the temperature change process.

[0008] In order to better realize the present application, further, the three pull rods are parallel to each other and are distributed in a regular triangle, two pull rods are arranged at the lower part and one pull rod is arranged at the upper part.

[0009] In order to better realize the present application, further, the first guiding support plate is in a T shape, the end portions of the first guiding support plate are respectively provided with connecting holes for embedding the pull rods, and the middle portion of the first guiding support plate is provided with a through hole for the pull force sensor probe to extend out.

[0010] In order to better realize the present application, further, the second guiding support plate is the same in structure as the first guiding support plate, and the through hole in the middle portion of the second guiding support plate is fixed with the piston rod of the servo loading cylinder.

[0011] In order to better realize the present application, further, the servo loading cylinder is further provided with a servo control valve block, the servo control valve block dynamically controls the servo loading cylinder to provide load for the measured product installed on the product installation platform.

[0012] In order to better realize the present application, further, the lower part of the base frame is further provided with a plurality of universal wheels with brakes.

[0013] Compared with the prior art, the present application has the following advantages and beneficial effects:

[0014] (1) The present application adopts three pull rods and two fixed plates to form a frame structure, the frame structure can resist larger torsional moments and tensile and compressive loadings due to the stability of the triangle, and has better stability in a long-term test process; and the structure reserves a larger operation space for disassembly and assembly of the test piece and later maintenance of the equipment, and the later use process is more convenient;

[0015] (2) The present application controls the accurate collection of loading force and displacement signals, and meets the test requirements of product dynamic displacement and loading force in the same test device. At the same time, the environmental temperature chamber can also provide the environmental temperature and humidity requirements in the test process, and realizes the complex working conditions of multi-condition coupling test;

[0016] (3) The present application installs the test piece into the environmental temperature chamber, the extreme temperature working conditions in the environmental temperature chamber are not suitable for installing sensors, so the collection modules of the tensile and compressive force sensors and the displacement sensors are external, which can greatly improve the collection accuracy and service life of the sensors;

[0017] (4) The present application has stable and reliable structure, convenient disassembly and maintenance, can simulate complex working conditions, has high control precision and long service life, can realize dynamic loading test of hydraulic components under different environmental temperatures, and is suitable for wide application and popularization. BRIEF DESCRIPTION OF DRAWINGS

[0018] Other features, objects, and advantages of the application will become more apparent from the following detailed description when read in connection with the following drawings:

[0019] Figure 1 is a front view of the present application;

[0020] Figure 2 is a schematic view of a planar structure of a first guide support plate in the present application.

[0021] Wherein: 1 - chassis, 2 - environmental incubator, 3 - pull rod, 4 - fixed plate, 5 - product mounting platform, 6 - first guide support plate, 7 - second guide support plate, 8 - servo loading cylinder, 9 - tension sensor, 10 - displacement sensor, 11 - servo control valve block, 12 - connecting hole, 13 - through hole. DETAILED DESCRIPTION

[0022] Embodiments of the present application are described in detail below with reference to examples illustrated in the accompanying drawings, in which the same or similar elements or elements having the same or similar functions are denoted by the same or similar reference numerals throughout. The embodiments described below by reference to the drawings are exemplary only, and are intended to explain the present application, and cannot be understood as limiting the present application.

[0023] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the limitation of "first", "second" is only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly including one or more features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0024] In the description of the present application, it should be noted that unless otherwise specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0025] Example 1:

[0026] The main structure of this embodiment is as follows: Figure 1 As shown, the device includes a base frame 1, with an ambient temperature chamber 2 mounted on top of the base frame 1. Three horizontally inserted tie rods 3 are embedded inside the ambient temperature chamber 2, with both ends of the tie rods 3 extending out of the ambient temperature chamber 2 and fixed by fixing plates 4. A product installation platform 5 is installed within the space formed by the three tie rods 3 inside the ambient temperature chamber 2. At both ends of the three tie rods 3 on both sides of the product installation platform 5, a first guide support plate 6 is located on the left side inside the ambient temperature chamber 2, and a second guide support plate 7 is located on the right side inside the ambient temperature chamber 2. A servo loading cylinder 8 is installed on the base frame 1 on the right side outside the ambient temperature chamber 2. The piston rod of the servo loading cylinder 8 extends to the left, passes through the middle of the second guide support plate 7, and is fixedly connected to the second guide support plate 7. A tension sensor 9 and a displacement sensor 10 are installed on the base frame 1 on the left side outside the ambient temperature chamber 2. The probe of the tension sensor 9 extends to the right, passes through the middle of the first guide support plate 6, and the displacement sensor 10 extends to the right to the second guide support plate 7 and is connected to it.

[0027] The specific usage process is as follows: the test specimen is installed on the product mounting platform 5, the probe of the tension sensor 9 is connected to the test specimen, and the servo loading cylinder 8 applies a load to the test specimen, which can directly feed back to the tension and compression sensors 9, thereby realizing real-time load acquisition and feedback to the controller for load control. The probe of the displacement sensor 10 extends into the environmental temperature chamber 2 and is connected to the second guide support plate 7. The piston rod of the servo loading cylinder 8 is connected to the through hole in the middle of the second guide support plate 7, and the guide rod of the servo loading cylinder 8 is connected to the test specimen; the second guide support plate 7 can slide on the tension cylinder 6; the second guide support plate 7 is connected to the probe of the displacement sensor 10. When the test specimen reciprocates with the piston rod of the servo loading cylinder 8, the displacement sensor 10 can acquire displacement data in real time. Through precise acquisition and control of loading force and displacement signals, the test requirements for dynamic displacement and loading force of the product are met in the same test system. At the same time, the environmental temperature chamber 2 can also provide the environmental temperature and humidity requirements of the test process, realizing the complex working conditions of multi-condition coupled test. Since the test specimen is installed inside the environmental temperature chamber 2, and the extreme temperature conditions inside the chamber are unsuitable for sensor installation, the acquisition modules of the tension / compression sensor 9 and the displacement sensor 10 are externalized, which greatly improves the sensor's acquisition accuracy and service life. The product installation platform 5 can be raised and lowered to assist in the precise installation of the test specimen.

[0028] Example 2:

[0029] The embodiment is further limited on the basis of the above-mentioned embodiment, the position relationship of the three pull rods 3, the three pull rods 3 are parallel to each other and are distributed in a regular triangle, two pull rods 3 are arranged at the lower part, and one pull rod 3 is arranged at the upper part. The position relationship of the pull rods 3 is arranged in this way because the triangle has stability, the frame structure in a triangle can resist larger torsional moments and tensile and compressive load, and has better stability in a long-term test process. Moreover, the structure can reserve a larger operation space for the product installation platform 5 to disassemble and assemble the test product and to maintain the equipment in the later period, and the use process in the later period is more convenient. The other parts of the embodiment are the same as those of the above-mentioned embodiment, and will not be described herein again.

[0030] Embodiment 3

[0031] The embodiment is further limited on the basis of the above-mentioned embodiment, the structure of the first guide support plate 6, as shown in Figure 2 The first guide support plate 6 is in a “T” shape, the end parts are respectively provided with connecting holes 12 for embedding the pull rods 3, and the middle part is provided with a through hole 13 for the probe of the pull force sensor 9 to extend out. This arrangement can provide guidance for the synchronous movement of the piston rod of the servo loading cylinder 8 connected to the test product, and can better inhibit the deformation of the frame baffle at both ends and the three pull rods 3 of the entire frame type loading structure after being subjected to tensile and compressive load, thereby improving the stress stability of the entire rack. The other parts of the embodiment are the same as those of the above-mentioned embodiment, and will not be described herein again.

[0032] Embodiment 4

[0033] The embodiment is further limited on the basis of the above-mentioned embodiment, the structure of the second guide support plate 7, the second guide support plate 7 has the same structure as the first guide support plate 6, and the through hole 13 in the middle part is fixed with the piston rod of the servo loading cylinder 8. The other parts of the embodiment are the same as those of the above-mentioned embodiment, and will not be described herein again.

[0034] Embodiment 5

[0035] The embodiment is further limited on the basis of the above-mentioned embodiment, the structure of the servo loading cylinder 8, as shown in Figure 1 The servo loading cylinder 8 is further provided with a servo control valve block 11, the servo control valve block 11 dynamically controls the servo loading cylinder 8 to provide load for the measured product installed on the product installation platform 5. The hydraulic source provides power for the servo loading cylinder 9, and through the dynamic control of the servo control valve block 10, the load on the test product is realized. The other parts of the embodiment are the same as those of the above-mentioned embodiment, and will not be described herein again.

[0036] Embodiment 6

[0037] The embodiment is further limited on the basis of the above-mentioned embodiment, the structure of the base frame 1, as shown in Figure 1As shown, the lower part of the chassis 1 is also provided with several universal wheels with brakes. The universal wheels are arranged at the bottom of the chassis 1, which can facilitate the movement of the loading test device. After moving to the designated position through the universal wheels, the universal wheels are fixed through the self-brake of the universal wheels, and then the test is performed. The other parts of the embodiment are the same as the above-described embodiments, and will not be described again.

[0038] It can be understood that the working principles and processes of components such as the displacement sensor 10 and the tension sensor 9 of the frame type belt temperature loading test device structure according to an embodiment of the present application are all prior art and are well known to those skilled in the art, and will not be described in detail here.

[0039] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A frame-type heated loading test device, characterized in that, Includes a base frame (1), on the upper part of which is an environmental temperature chamber (2). Three tie rods (3) are horizontally embedded in the environmental temperature chamber (2). The two ends of the three tie rods (3) extend out of the environmental temperature chamber (2) and are fixed by a fixing plate (4). A product installation platform (5) is set in the space formed by the three tie rods (3) inside the environmental temperature chamber (2). The two ends of the three tie rods (3) on both sides of the product installation platform (5) are respectively provided with a first guide support plate (6) on the left side inside the environmental temperature chamber (2) and a second guide support plate on the right side inside the environmental temperature chamber (2). A servo loading cylinder (8) is installed on the base frame (1) on the right side of the environmental temperature chamber (2). The piston rod of the servo loading cylinder (8) extends to the left through the middle of the second guide support plate (7) and is fixedly connected to the second guide support plate (7). A tension sensor (9) and a displacement sensor (10) are installed on the base frame (1) on the left side of the environmental temperature chamber (2). The probe of the tension sensor (9) extends to the right through the middle of the first guide support plate (6). The displacement sensor (10) extends to the right to the second guide support plate (7) and is connected to it. The three tie rods (3) are parallel to each other and arranged in an equilateral triangle, with two tie rods (3) at the bottom and one tie rod (3) at the top.

2. The frame-type temperature-loaded testing device according to claim 1, characterized in that, The first guide support plate (6) is T-shaped, and its ends are respectively provided with connection holes (12) for nesting pull rods (3). The middle part of the first guide support plate (6) is provided with a through hole (13) for the probe of the tension sensor (9) to extend.

3. The frame-type temperature-loaded testing device according to claim 2, characterized in that, The second guide support plate (7) has the same structure as the first guide support plate (6), and the through hole (13) in the middle is fixed to the piston rod of the servo loading cylinder (8).

4. The frame-type temperature-loaded testing device according to claim 1, characterized in that, The servo loading cylinder (8) is also equipped with a servo control valve block (11), which dynamically controls the servo loading cylinder (8) to provide load for the product under test installed on the product installation platform (5).

5. The frame-type temperature-loaded testing device according to claim 1, characterized in that, The lower part of the base frame (1) is also equipped with several universal wheels with brakes.

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