Frame type temperature loading test device

Abstract

The invention relates to the technical field of comprehensive test equipment, and particularly discloses a frame type loading test device with temperature, which comprises a bottom frame, an environment temperature box is arranged on the bottom frame, three pull rods are transversely embedded and inserted in the environment temperature box, two ends of the three pull rods are fixed through fixing plates, and a product mounting platform is arranged in the environment temperature box. A first guide supporting plate and a second guide supporting plate are arranged on the two sides of the product installation platform respectively, a servo loading cylinder is installed on the bottom frame, a piston rod of the servo loading cylinder is fixedly connected with the second guide supporting plate, and a tension sensor and a displacement sensor are installed on the bottom frame on the left side outside the environment temperature box. A probe of the tension sensor penetrates through the middle of the first guide supporting plate, and the displacement sensor is connected with the second guide supporting plate. The device is stable and reliable in structure, convenient to disassemble, assemble and maintain, capable of simulating complex working conditions, high in control precision, long in service life and suitable for wide application and popularization, and dynamic loading tests of hydraulic components at different environment temperatures can be achieved.

Description

Technical Field

[0001] The invention relates to the technical field of comprehensive testing equipment, and in particular to a frame-type temperature-loaded testing device. Background Art

[0002] The hydraulic actuator converts the hydraulic pressure of the hydraulic source into a corresponding motion state through a mechanical structure, driving the terminal components to perform corresponding actions. Traditionally, the performance of hydraulic components is usually evaluated separately. The sealing performance of the hydraulic test piece is verified through high and low pressure reciprocating cycle tests, and the maximum output force of the hydraulic component is verified by applying loads. In order to simulate the accelerated failure of hydraulic products at different temperatures, environmental temperature tests are usually performed separately.

[0003] Separating each test condition and testing it separately plays a very important role in verifying the hydraulic products before delivery and use. However, conducting different types of test assessments separately prolongs the cycle of the entire test and testing process, resulting in delayed product delivery. At the same time, when conducting different types of tests, it is also necessary to consider the balance between over-assessment and under-assessment. On the other hand, after the hydraulic products are delivered and installed in the entire device, the factors affecting the operation process are often complex and dynamic, with multiple factors such as external loads, temperature changes, and movement process speed coupled. Therefore, the test assessment of a single condition cannot fully reproduce the actual operating conditions of the hydraulic product, so it is difficult to effectively assess the hydraulic product.

[0004] The process of hydraulic products working on external loads is often not static, and the size of the external load is not fixed, so the movement speed of hydraulic products and the external load in different working stages of different devices are changing. Complex working conditions and dynamic alternating loads are more accurate for verifying the service life of hydraulic products. However, to simulate complex working conditions of hydraulic components, higher requirements are placed on the test equipment. Summary of the invention

[0005] The object of the present invention is to provide a frame-type temperature-loaded test device which has good stability, can provide the environmental temperature and humidity requirements of the test process, and realizes the complex working conditions of multi-condition coupling test.

[0006] The present invention is achieved through the following technical scheme: a frame-type temperature-loaded test device, including a base frame, an environmental temperature box is arranged on the upper part of the base frame, three pull rods are horizontally inserted in the environmental temperature box, the two ends of the three pull rods respectively extend out of the environmental temperature box and are fixed by a fixed plate, a product installation platform is arranged in the environmental temperature box in the space formed by the three pull rods, and the two ends of the three pull rods on both sides of the product installation platform are also respectively provided with a first guide support plate located on the left side of the environmental temperature box and a second guide support plate located on the right side of the environmental temperature box, a servo loading cylinder is installed on the base frame on the right side outside the environmental temperature box, the piston rod of the servo loading cylinder extends to the left through the middle part of the second guide support plate and is fixedly connected to the second guide support plate, a tension sensor and a displacement sensor are installed on the base frame on the left side outside the environmental temperature box, the probe of the tension sensor extends to the right through the middle part of the first guide support plate, and the displacement sensor extends to the right to the second guide support plate and is connected to it.

[0007] The working principle of this technical solution is to use three tie rods and fixed plates on both sides as the main supporting structure, with an environmental temperature box in the middle, and the test piece is installed on the product installation platform in the environmental temperature box for testing. The triangle has stability, and the three-frame structure can resist large torsional moments and tensile and compressive loads, and has better stability during the long-term test process. The product installation platform is located between the three tie rods, so the structure reserves a large operating space for the disassembly and assembly of the test piece and the later maintenance of the equipment, which is more convenient for the later use process. The test piece is connected to the servo loading cylinder piston cylinder for reciprocating motion, and the displacement sensor can collect displacement data in real time. Through the precise acquisition and control of the loading force and displacement signals, the test requirements of the dynamic displacement and loading force of the product are met in the same test device. At the same time, the environmental temperature box can also provide the environmental temperature and humidity requirements of the test process, realizing the complex working conditions of multi-condition coupling tests. In addition, the most important thing about the test equipment is its detection accuracy. The higher the accuracy of the sensor, the higher the requirements for the environment. Changes in ambient temperature will greatly affect the acquisition accuracy and service life of the sensor. Since the test piece is installed in an environmental temperature chamber, the extreme temperature conditions inside the environmental temperature chamber are not suitable for installing sensors. Therefore, this technical solution places the acquisition modules of the tension and pressure sensors and displacement sensors externally, which can greatly improve the acquisition accuracy and service life of the sensors. The other end of a tension and pressure sensor fixed to a fixed plate is connected to the test product through a connecting fixture. The support plate is fixed between the two pull rods to ensure that the loads are concentric after the tension and pressure sensor and the test piece are connected, and no eccentric load is generated. The product installation platform can be raised and lowered to assist in the precise installation of the test piece. The servo loading cylinder is fixed to the frame baffle on the other side, and the piston rod is connected to the other end of the test piece through a guide support and a connecting fixture, thereby realizing the limit constraint on the test piece. The external servo loading cylinder can greatly reduce the aging failure of the sealing structure during the temperature change process.

[0008] In order to better implement the present invention, further, the three pull rods are parallel to each other and 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 implement the present invention, further, the first guide support plate is in a "T" shape, and its ends are respectively provided with connecting holes for nesting the pull rod, and the middle of the first guide support plate is provided with a through hole for the tension sensor probe to extend out.

[0010] In order to better implement the present invention, further, the second guide support plate has the same structure as the first guide support plate, and the through hole in the middle thereof is fixed to the piston rod of the servo loading cylinder.

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

[0012] In order to better implement the present invention, further, a plurality of universal wheels with brakes are arranged at the lower part of the base frame.

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

[0014] (1) The present invention uses three tie rods and fixed plates on both sides to form a frame structure. Since the triangle has stability, the frame structure can resist large torsional moments and tensile and compressive loads, and has better stability during long-term testing. In addition, the structure reserves a large operating space for disassembly and assembly of the test piece and later maintenance of the equipment, making the later use process more convenient.

[0015] (2) The present invention meets the test requirements of dynamic displacement and loading force of products in the same test device through the precise acquisition and control of loading force and displacement signals. At the same time, the environmental temperature box can also provide the environmental temperature and humidity requirements of the test process, realizing the complex working conditions of multi-condition coupling test;

[0016] (3) The present invention installs the test piece in an environmental temperature box. The extreme temperature conditions inside the environmental temperature box are not suitable for installing sensors. Therefore, the present invention places the acquisition modules of the tension and pressure sensors and the displacement sensors externally, which can greatly improve the acquisition accuracy and service life of the sensors.

[0017] (4) The present invention has a stable and reliable structure, is easy to disassemble and maintain, can simulate complex working conditions, has high control accuracy, and has a long service life. It can realize dynamic loading tests on hydraulic components at different ambient temperatures and is suitable for wide promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments with reference to the following drawings:

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

[0020] Figure 2 It is a schematic diagram of the planar structure of the first guide support plate in the present invention.

[0021] Among them: 1-base frame, 2-environmental temperature box, 3-pull rod, 4-fixed plate, 5-product installation 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 invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, it is limited that "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly including one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "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 a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] Embodiment 1:

[0026] The main structure of this embodiment is as follows: Figure 1 As shown, it includes a base frame 1, an environmental temperature box 2 is arranged on the upper part of the base frame 1, three pull rods 3 are horizontally inserted in the environmental temperature box 2, and the two ends of the three pull rods 3 extend out of the environmental temperature box 2 and are fixed by a fixing plate 4, a product installation platform 5 is arranged in the space formed by the three pull rods 3 in the environmental temperature box 2, and the two ends of the three pull rods 3 on both sides of the product installation platform 5 are also respectively provided with a first guide support plate 6 located on the left side of the environmental temperature box 2 and a second guide support plate 7 located on the right side of the environmental temperature box 2, a servo loading cylinder 8 is installed on the base frame 1 on the right side outside the environmental temperature box 2, the piston rod of the servo loading cylinder 8 extends to the left through the middle part 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 environmental temperature box 2, the probe of the tension sensor 9 extends to the right through the middle part 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 thereto.

[0027] The specific use process is to install the test piece on the product installation platform 5, connect the probe of the tension sensor 9 to the test piece, and the servo loading cylinder 8 can directly feed back to the tension pressure sensor 9 after applying load to the test piece, so as to realize real-time acquisition of load and feedback to the controller for load control. The probe of the displacement sensor 10 extends to the inside of the environmental temperature box 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 piece; the second guide support plate 7 can slide on the pull cylinder 6; the second guide support plate 7 is connected to the probe of the displacement sensor 10, and when the test piece is connected to the piston rod of the servo loading cylinder 8 for reciprocating motion, the displacement sensor 10 can collect displacement data in real time. Through the precise acquisition and control of the loading force and displacement signals, the test requirements of the dynamic displacement and loading force of the product are met in the same test system. At the same time, the environmental temperature box 2 can also provide the environmental temperature and humidity requirements of the test process, realizing the complex working conditions of multi-condition coupling test. Since the test piece is installed in the environmental temperature box 2, the extreme temperature condition inside the environmental temperature box 2 is not suitable for installing sensors, so the acquisition modules of the tension and pressure sensor 9 and the displacement sensor 10 are placed externally, which can greatly improve the acquisition accuracy and service life of the sensors. The product installation platform 5 can be raised and lowered to assist the test piece in accurate installation.

[0028] Embodiment 2:

[0029] Based on the above embodiment, this embodiment further defines the positional relationship of the three tie rods 3. The three tie rods 3 are parallel to each other and distributed in a regular triangle, with two tie rods 3 arranged at the bottom and one tie rod 3 arranged at the top. The positional relationship of the tie rods 3 is arranged in this way because the triangle has stability, and the triangular array frame structure can resist large torsional moments and tensile and compressive loads, and the long-term test process has better stability. In addition, this structure can reserve a larger operating space for the product installation platform 5 for disassembly and assembly of the test piece and later maintenance of the equipment, making the later use process more convenient. The other parts of this embodiment are the same as the above embodiment and will not be repeated.

[0030] Embodiment 3:

[0031] Based on the above embodiment, this embodiment further defines the structure of the first guide support plate 6, such as Figure 2 As shown, the first guide support plate 6 is in a "T" shape, and its ends are respectively provided with connection holes 12 for nesting the pull rods 3, and the middle of the first guide support plate 6 is provided with a through hole 13 for the probe of the tension sensor 9 to extend. Such a setting can provide guidance for the synchronous movement of the piston rod of the test product connected to the servo loading cylinder 8, and on the other hand, the deformation of the frame baffles and three pull rods 3 at both ends of the entire frame loading structure after being subjected to tensile and compressive loads can be better suppressed, thereby improving the force stability of the entire stand. The other parts of this embodiment are the same as the above embodiment and will not be repeated.

[0032] Embodiment 4:

[0033] Based on the above embodiment, this embodiment further defines the structure of the second guide support plate 7, which has the same structure as the first guide support plate 6, and the through hole 13 in the middle thereof is fixed to the piston rod of the servo loading cylinder 8. The other parts of this embodiment are the same as those of the above embodiment and will not be described in detail.

[0034] Embodiment 5:

[0035] Based on the above embodiment, this embodiment further defines the structure of the servo loading cylinder 8, such as Figure 1 As shown, the servo loading cylinder 8 is also provided with a servo control valve block 11, and the servo control valve block 11 dynamically controls the servo loading cylinder 8 to provide a load for the tested product installed on the product installation platform 5. The hydraulic source provides power for the servo loading cylinder 9, and the load is applied to the test piece through the dynamic control of the servo control valve block 10. The other parts of this embodiment are the same as the above embodiment and will not be repeated.

[0036] Embodiment 6:

[0037] Based on the above embodiments, this embodiment further defines the structure of the base frame 1, such as Figure 1As shown, the lower part of the chassis 1 is also provided with a plurality of universal wheels with brakes. Universal wheels are provided at the bottom of the chassis 1, which can facilitate the movement of the loading test device. After the universal wheels are moved to the specified position, the universal wheels are fixed by the brakes provided thereon, and then the test is performed. The other parts of this embodiment are the same as those of the above embodiment and will not be described in detail.

[0038] It can be understood that the working principles and working processes of the frame-type temperature loading test device structure according to an embodiment of the present invention, such as the displacement sensor 10 and the tension sensor 9 and other components are all prior arts and are well known to technicians in this field, and will not be described in detail here.

[0039] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A frame-type temperature loading test device, characterized in that: The invention comprises a base frame (1), an environmental temperature box (2) is arranged on the upper part of the base frame (1), three tie rods (3) are transversely inserted in the environmental temperature box (2), the two ends of the three tie rods (3) respectively extend out of the environmental temperature box (2) and are fixed by a fixing plate (4), a product installation platform (5) is arranged in the space formed by the three tie rods (3) in the environmental temperature box (2), and the two ends of the three tie rods (3) on both sides of the product installation platform (5) are also respectively provided with a first guide support plate (6) located on the left side of the environmental temperature box (2) and a second guide support plate (6) located on the right side of the environmental temperature box (2). A servo loading cylinder (8) is installed on the bottom frame (1) on the right side outside the environmental temperature box (2), and 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 bottom frame (1) on the left side outside the environmental temperature box (2), and the probe of the tension sensor (9) extends to the right 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 thereto.

2. A frame-type temperature loading test device according to claim 1, characterized in that: The three pull rods (3) are parallel to each other and are distributed in the form of a regular triangle, with two pull rods (3) being arranged at the bottom and one pull rod (3) being arranged at the top.

3. A frame-type temperature loading test device according to claim 1 or 2, characterized in that: The first guide support plate (6) is in a "T" shape, and its ends are respectively provided with connection holes (12) for nesting the pull rod (3), and the middle of the first guide support plate (6) is provided with a through hole (13) for the probe of the tension sensor (9) to extend out.

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

5. A frame-type temperature-loaded test device according to claim 1 or 2, characterized in that: The servo loading cylinder (8) is also provided with a servo control valve block (11), and the servo control valve block (11) dynamically controls the servo loading cylinder (8) to provide a load for the product to be tested installed on the product installation platform (5).

6. A frame-type temperature loading test device according to claim 1 or 2, characterized in that: The lower part of the base frame (1) is also provided with a plurality of universal wheels with brakes.

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