A high temperature control device for a local friction simulation test machine for a control valve sealing pair

Abstract

The present invention relates to the technical field of friction test equipment, and discloses a high-temperature control device for a local friction simulation test machine of a control valve seal pair, comprising a support assembly, a high-temperature assembly and a cooling assembly; a height-adjustable support assembly is installed on the upper part of a loading test bench of the test machine; the high-temperature assembly comprises a high-temperature housing, which is installed on the upper part of an upper support panel, a heat-insulating layer is arranged inside the high-temperature housing, and a high-temperature furnace wire is arranged in an internal groove of the heat-insulating layer; a ball bearing hinge block in the test machine can pass through the middle seal of the high-temperature housing, the heat-insulating layer and the high-temperature furnace wire, and a sensor channel is provided on the ball bearing hinge block; the cooling assembly is used to cool down the peripheral environment of the high-temperature assembly and the main shaft motion assembly of the lower specimen of the test machine. The present invention can accurately control the temperature in the high-temperature cavity, thereby enabling the test machine to carry out corresponding local high-temperature friction simulation experiments, and at the same time, the support assembly in the present invention is height-adjustable, thereby ensuring the heat preservation of the high-temperature cavity.

Description

Technical Field

[0001] The invention relates to the technical field of friction test equipment, and more specifically to a high temperature control device of a local friction simulation test machine for a control valve sealing pair. Background Art

[0002] Under high temperature conditions, control valves will be damaged to varying degrees. Since they often work in extremely harsh working conditions such as high temperature, high pressure difference, strong corrosion and strong wear, the physical and mechanical properties of metal materials are prone to decline under the action of high temperature media. Due to the thermal expansion properties of the sealing material, the valve is prone to jamming during the opening and closing process, resulting in wear of the sealing surface, a sharp decline in sealing performance, and a reduction in valve life. In terms of transient thermal shock caused by valve opening and closing, people have found that the faster the heating rate, the greater the thermal shock effect, and the greater the damage to the structure. In order to solve such problems, the stress and strain distribution of the sealing pair is obtained through Ansys simulation analysis, and CAE design simulation is performed again, which can provide a theoretical basis for improving the structural design of the control valve. However, in order to verify the effect of structural improvement, corresponding local high-temperature friction simulation experiments need to be carried out.

[0003] However, the currently designed control valve seal pair local friction simulation test machine does not have a high temperature module. In order to solve this problem, it is necessary to design a high temperature control device for the control valve seal pair local friction simulation test machine. Summary of the invention

[0004] In view of this, the present invention proposes a high temperature control device for a local friction simulation test machine for a control valve sealing pair to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention adopts the following technical solution:

[0006] A high-temperature control device for a local friction simulation test machine for a control valve sealing pair, comprising a support assembly, a high-temperature assembly and a cooling assembly; the height-adjustable support assembly is installed on the upper part of the test machine loading test bench and is surrounded by the outer ring of the test machine lower specimen spindle motion assembly; the lower specimen motion mechanism in the test machine lower specimen spindle motion assembly extends from the middle hole of the upper support panel of the support assembly, and the bottom of the upper support panel fits the motion mechanism table located on the outer side of the lower specimen motion mechanism; the high-temperature assembly comprises a high-temperature outer shell with a middle opening, the high-temperature outer shell is installed on the upper part of the upper support panel and covers the middle hole of the upper support panel, an insulation layer is arranged inside the high-temperature outer shell, and a high-temperature furnace wire is arranged in the inner groove of the insulation layer In the testing machine, the ball bearing hinge block connected to the telescopic rod of the hydraulic cylinder can pass through the middle seal of the high-temperature outer shell, the insulation layer and the high-temperature furnace wire, so that the upper specimen on the ball bearing hinge block and the lower specimen on the lower specimen movement mechanism are arranged opposite to each other and are in the formed high-temperature cavity; a sensor channel is provided on the ball bearing hinge block, and the sensor component extends into the high-temperature cavity through the sensor channel and performs corresponding detection on the specimen; the cooling component is used to cool down the peripheral environment of the high-temperature component and the main shaft movement component of the lower specimen of the testing machine; a data acquisition and control system electrically connected to the sensor component and the cooling component respectively is installed on the outside of the support component, and the data acquisition and control system includes a temperature control meter for controlling the opening and closing of the high-temperature furnace wire.

[0007] Preferably, the support assembly includes a lower support frame, an upper support frame and the upper support panel, the lower support frames are four in total and are arranged in a rectangular shape on the outside of the lower specimen spindle motion assembly of the testing machine, the bottom end of the lower support frame is fixedly connected to the upper surface of the loading test bench of the testing machine, the upper support frame is detachably connected to the upper end of the lower support frame, and the connection position of the upper support frame on the lower support frame is vertically adjustable; the upper support panel is integrally installed on the top ends of the four upper support frames.

[0008] Preferably, a strip hole is provided on the upper side of the lower support frame along its axial direction, and a threaded locking buckle is provided on the lower side of the upper support frame that can fit through the strip hole and be fixed and locked at different heights.

[0009] Preferably, the data acquisition and control system is installed on the upper support panel and is located outside the high-temperature casing.

[0010] Preferably, the lower portion of the thermal insulation layer is in contact with the upper support panel, and the high-temperature furnace wire is disposed around the high-temperature cavity and installed around the test piece.

[0011] Preferably, the sensor assembly includes an S-type temperature sensor, the temperature controller is connected to the S-type temperature sensor via a wire, and a thyristor is installed between the S-type temperature sensor and the temperature controller for overload protection of the temperature controller.

[0012] Preferably, the sensor assembly further comprises a strain gauge sensor for measuring the strain generated by the deformation of the upper specimen and a displacement sensor for measuring the degree of deformation of the upper specimen.

[0013] Preferably, the data acquisition and control system further comprises a strain gauge transmitter, and the strain gauge transmitter is connected to the strain gauge sensor via a wire.

[0014] Preferably, the cooling component includes a cooling box installed on the outer wall of the loading test bench of the testing machine, the cooling box is provided with a water inlet and a water outlet, the two ends of the cooling pipe are respectively connected to the water inlet and the water outlet, and the cooling pipe is arranged around the high-temperature component and the main shaft motion component of the lower specimen of the testing machine.

[0015] Preferably, the cooling pipe also passes through the testing machine loading test bench to perform surrounding cooling on the testing machine lower specimen spindle motion assembly located at the lower part of the testing machine loading test bench.

[0016] Compared with the prior art, the high temperature control device of the control valve sealing pair local friction simulation test machine of the present invention has the following beneficial effects:

[0017] 1) Based on the local friction simulation test machine for the control valve seal pair, the present invention provides a high-temperature control device matched therewith, which can accurately control the temperature in the high-temperature cavity, thereby enabling the test machine to carry out corresponding local high-temperature friction simulation experiments.

[0018] 2) The present invention is designed with a flexibly adjustable support component for different rotating and reciprocating loading test benches in the testing machine. The upper support frame can adjust the height relative to the lower support frame so that the bottom of the upper support panel can fit the motion mechanism table located on the outer circle of the lower specimen motion mechanism, thereby allowing the upper support panel, the motion mechanism table and the high-temperature outer shell to enclose a high-temperature cavity with good thermal insulation performance.

[0019] 3) The present invention also designs a cooling component to cool down the high-temperature component and the periphery of the spindle motion component of the test piece under the test machine, so as to prevent the heat emitted from the high-temperature cavity from affecting other components working in the test machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0021] Figure 1 A schematic diagram of the partial structure of a high temperature control device of a local friction simulation test machine for a control valve seal pair of the present invention during a rotational friction motion test.

[0022] Figure 2 A schematic diagram of the partial structure of a high temperature control device of a local friction simulation test machine for a control valve seal pair of the present invention during a linear reciprocating friction motion test.

[0023] Figure 3 It is a schematic diagram of the structure of the support assembly in the present invention.

[0024] Figure 4 The overall structural diagram of the cooling assembly in the high temperature control device of the local friction simulation test machine for the control valve sealing pair of the present invention is a rotary friction motion test.

[0025] Figure 5 The overall structural diagram of the cooling assembly in the high temperature control device of the local friction simulation test machine for the control valve sealing pair of the present invention is a linear reciprocating friction motion test.

[0026] In the figure: 1-lower support frame, 2-upper support frame, 3-upper support panel, 4-test machine loading test bench, 5-test machine lower specimen spindle motion assembly, 6-motion mechanism table, 7-strip hole, 8-thread locking buckle, 9-high temperature shell, 10-insulation layer, 11-high temperature furnace wire, 12-ball hinge block, 13-upper specimen, 14-high temperature cavity, 15-sensor channel, 16-data acquisition and control system, 17-cooling box, 18-water inlet, 19-water outlet, 20-cooling pipe. DETAILED DESCRIPTION

[0027] 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 intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0028] In the description of the present invention, it is necessary to understand that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the 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 a limitation on the present invention.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0030] Example:

[0031] The invention provides a high temperature control device for a local friction simulation test machine of a control valve sealing pair, comprising a supporting component, a high temperature component and a cooling component.

[0032] Specifically, the height-adjustable support assembly is installed on the upper part of the testing machine loading test bench 4, and is surrounded by the outer ring of the testing machine lower specimen spindle motion assembly 5; the lower specimen motion mechanism in the testing machine lower specimen spindle motion assembly 5 extends from the middle hole of the upper support panel of the support assembly, and the bottom of the upper support panel 3 fits the motion mechanism table 6 located on the outside of the lower specimen motion mechanism.

[0033] In further specific embodiments, see Figure 3 The support assembly includes a lower support frame 1, an upper support frame 2 and an upper support panel 3. There are four lower support frames 1 and they are arranged in a rectangular shape on the outside of the lower specimen spindle motion assembly 5 of the testing machine. The bottom end of the lower support frame 1 is fixedly connected to the upper surface of the loading test bench 4 of the testing machine. The upper support frame 2 is detachably connected to the upper end of the lower support frame 1, and the connection position of the upper support frame 2 on the lower support frame 1 is vertically adjustable; the upper support panel 3 is integrally installed on the top ends of the four upper support frames 2.

[0034] More specifically, a strip hole 7 is provided on the upper side of the lower support frame 1 along its axial direction, and a threaded locking buckle 8 is provided on the lower side of the upper support frame 2, which can fit through the strip hole 7 and be fixed and locked at different heights, that is, the locking position of the threaded locking buckle 8 in the strip hole 7 is adjustable.

[0035] The control valve sealing pair local friction simulation test machine corresponding to the present invention can be used to carry out local high-temperature friction simulation experiments on the sealing pair in rotation and linear reciprocating test modes. The lower specimen spindle motion assembly 5 of the test machine in the test machine includes a lower specimen rotation friction quick-change assembly and a lower specimen linear reciprocating motion quick-change assembly, which can convert the rotational motion into precise linear reciprocating friction motion, wherein the rotational motion simulates the friction of the ball valve sealing surface, and the linear reciprocating friction simulates the friction of the butterfly valve sealing surface, thereby satisfying the actual motion trajectory of the control valve sealing pair. Therefore, the test machine needs to quickly replace different components when conducting rotation and linear reciprocating experiments. In view of the height difference between the lower specimen rotation friction quick-change assembly and the lower specimen linear reciprocating quick-change assembly after installation (that is, the reciprocating test bench and the rotation test bench have different heights), when conducting local high-temperature friction simulation experiments under different modes, it is necessary to adjust the height of the upper support frame 2 relative to the lower support frame 1 accordingly, so as to ensure that the upper support panel 3 can fit the motion mechanism table 6 located on the outer circle of the lower specimen motion mechanism, forming an insulated high-temperature cavity 14 to prevent heat dissipation.

[0036] Attached Figure 1 The figure shows a partial structural diagram of the high temperature control device of the present invention when the lower specimen spindle motion assembly 5 of the testing machine is a lower specimen rotating friction quick-change assembly.

[0037] Attached Figure 2 The figure shows a partial structural diagram of the high temperature control device of the present invention when the lower specimen spindle motion assembly 5 of the testing machine is a lower specimen linear reciprocating motion quick-change assembly.

[0038] The length of the strip hole 7 in the lower support frame 1 is generally 100 mm, that is, the maximum adjustment range between the upper support frame 2 and the lower support frame 1 is 0-100 mm.

[0039] The high-temperature component includes a high-temperature shell 9 with a middle opening, the high-temperature shell 9 is installed on the upper part of the upper support panel 3 and covers the middle hole of the upper support panel 3, the interior of the high-temperature shell 9 is provided with an insulation layer 10, and the high-temperature furnace wire 11 is arranged in the internal groove of the insulation layer 10; the ball joint block 12 connected to the hydraulic cylinder telescopic rod in the testing machine can pass through the middle seal of the high-temperature shell 9, the insulation layer 10 and the high-temperature furnace wire 11, so that the upper specimen 13 on the ball joint block 12 and the lower specimen on the lower specimen movement mechanism are arranged opposite to each other and are in the formed high-temperature cavity 14; the ball joint block 12 is provided with a sensor channel 15, the sensor component extends into the high-temperature cavity 14 through the sensor channel 15, and performs corresponding detection on the specimen; the cooling component is used to cool down the peripheral environment of the high-temperature component and the lower specimen spindle movement component 5 of the testing machine.

[0040] In the present invention, the lower part of the insulation layer 10 is in contact with the upper support panel 3, and the upper support panel 3, the motion mechanism table 6 and the high-temperature housing 9 equipped with the insulation layer 10 together enclose a high-temperature cavity 14 with good insulation performance. The high-temperature furnace wire 11 is arranged around the high-temperature cavity 14 and is installed around the test piece.

[0041] The support assembly is externally provided with a data acquisition and control system 16 electrically connected to the sensor assembly and the cooling assembly, and the data acquisition and control system 16 includes a temperature control meter for controlling the opening and closing of the high-temperature furnace wire 11. The data acquisition and control system 16 is specifically installed on the upper support panel 3 and is located outside the high-temperature housing 9.

[0042] In a further specific embodiment, the sensor assembly includes an S-type temperature sensor, the temperature controller is connected to the S-type temperature sensor via a wire, and a thyristor is installed between the S-type temperature sensor and the temperature controller to protect the temperature controller from overload.

[0043] Furthermore, the sensor assembly also includes a strain gauge sensor for measuring the strain generated by the deformation of the upper specimen and a displacement sensor for measuring the degree of deformation of the upper specimen.

[0044] At the same time, the data acquisition and control system 16 also includes a strain gauge transmitter, which is connected to the strain gauge sensor through a wire to amplify the weak electrical signal collected by the strain gauge sensor and convert it into a standard electrical signal.

[0045] In a further specific embodiment, the cooling component includes a cooling box 17 installed on the outer wall of the testing machine loading test bench 4, and the cooling box 17 is provided with a water inlet 18 and a water outlet 19. The two ends of the cooling pipe 20 are respectively connected to the water inlet 18 and the water outlet 19, and the cooling pipe 20 is arranged around the high-temperature component and the lower specimen spindle motion component 5 of the testing machine.

[0046] The cooling pipe 20 also passes through the testing machine loading test bench 4 , and also performs surrounding cooling on the testing machine lower specimen spindle motion assembly 5 located at the lower part of the testing machine loading test bench 4 .

[0047] Attached Figure 4 The figure shows the installation diagram of the cooling assembly in the present invention when the lower specimen spindle motion assembly 5 of the testing machine is a lower specimen rotation friction quick-change assembly.

[0048] Attached Figure 5 The figure shows the installation diagram of the cooling assembly in the present invention when the lower specimen spindle motion assembly 5 of the testing machine is a lower specimen linear reciprocating motion quick-change assembly.

[0049] When the present invention is working, after the specimen is fixed to the corresponding lower specimen movement mechanism and the ball joint block 12, the high-temperature furnace wire 11 is controlled to start heating, and a large amount of heat is transmitted to the specimen through the air in the high-temperature cavity 14 to exert high temperature on it. The S-type temperature sensor through the sensor channel 15 will measure the temperature, and the temperature control meter will control it, ultimately achieving the effect of precise high-temperature control, and other sensors will measure the corresponding data in this high-temperature environment.

[0050] When the high-temperature furnace wire 11 starts working, the external cooling component will also be turned on synchronously. The water in the cooling box 17 will flow out from the water outlet 19, through the cooling pipe 20, through the high-temperature component and around the spindle motion component 5 of the test piece under the test machine, to prevent the heat emitted from the high-temperature cavity 14 from affecting other components working in the test machine.

[0051] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0052] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A high temperature control device for a local friction simulation test machine for a control valve sealing pair, characterized in that: It includes a support assembly, a high-temperature assembly and a cooling assembly; the height-adjustable support assembly is installed on the upper part of the testing machine loading test bench and is surrounded by the outer ring of the testing machine lower specimen spindle motion assembly; the lower specimen motion mechanism in the testing machine lower specimen spindle motion assembly extends from the middle hole of the upper support panel of the support assembly, and the bottom of the upper support panel fits the motion mechanism table located outside the lower specimen motion mechanism; the high-temperature assembly includes a high-temperature outer shell with a middle opening, the high-temperature outer shell is installed on the upper part of the upper support panel and covers the middle hole of the upper support panel, the interior of the high-temperature outer shell is provided with a heat-insulating layer, and the high-temperature furnace wire is arranged in the internal groove of the heat-insulating layer; the test machine is telescopic with the hydraulic cylinder The ball bearing hinge block connected to the rod can pass through the middle seal of the high-temperature outer shell, the insulation layer and the high-temperature furnace wire, so that the upper specimen on the ball bearing hinge block and the lower specimen on the lower specimen movement mechanism are arranged opposite to each other and are in the formed high-temperature cavity; a sensor channel is opened on the ball bearing hinge block, and the sensor component extends into the high-temperature cavity through the sensor channel and performs corresponding detection on the specimen; the cooling component is used to cool down the peripheral environment of the high-temperature component and the lower specimen spindle movement component of the testing machine; a data acquisition and control system electrically connected to the sensor component and the cooling component is installed on the outside of the support component, and the data acquisition and control system includes a temperature control meter for controlling the opening and closing of the high-temperature furnace wire.

2. A high temperature control device for a control valve sealing pair local friction simulation test machine according to claim 1, characterized in that: The support assembly includes a lower support frame, an upper support frame and the upper support panel. There are four lower support frames in total and are arranged in a rectangular shape on the outside of the lower specimen spindle motion assembly of the testing machine. The bottom end of the lower support frame is fixedly connected to the upper surface of the loading test bench of the testing machine. The upper support frame is detachably connected to the upper end of the lower support frame, and the connection position of the upper support frame on the lower support frame is vertically adjustable; the upper support panel is integrally installed on the top ends of the four upper support frames.

3. A high temperature control device for a control valve sealing pair local friction simulation test machine according to claim 2, characterized in that: A strip hole is provided on the upper side of the lower support frame along its axial direction, and a threaded locking buckle is provided on the lower side of the upper support frame, which can fit through the strip hole and be fixed and locked at different heights.

4. A high temperature control device for a local friction simulation test machine for a control valve seal pair according to any one of claims 1 to 3, characterized in that: The data acquisition and control system is installed on the upper support panel and is located outside the high-temperature housing.

5. A high temperature control device for a local friction simulation test machine for a control valve seal pair according to any one of claims 1 to 3, characterized in that: The lower part of the heat-insulating layer is in contact with the upper supporting panel, and the high-temperature furnace wire is arranged in the high-temperature cavity and installed around the test piece.

6. A high temperature control device for a control valve seal pair local friction simulation test machine according to claim 1, characterized in that: The sensor assembly includes an S-type temperature sensor, the temperature control meter is connected to the S-type temperature sensor via a wire, and a thyristor for overload protection of the temperature control meter is installed between the S-type temperature sensor and the temperature control meter.

7. A high temperature control device for a control valve seal pair local friction simulation test machine according to claim 6, characterized in that: The sensor assembly also includes a strain gauge sensor for measuring the strain generated by the deformation of the upper test piece and a displacement sensor for measuring the degree of deformation of the upper test piece.

8. A high temperature control device for a control valve seal pair local friction simulation test machine according to claim 7, characterized in that: The data acquisition and control system also includes a strain gauge transmitter, and the strain gauge transmitter is connected to the strain gauge sensor through a wire.

9. The high temperature control device of the control valve sealing pair local friction simulation test machine according to claim 1, characterized in that: The cooling assembly includes a cooling box installed on the outer wall of the loading test bench of the testing machine. The cooling box is provided with a water inlet and a water outlet. The two ends of the cooling pipe are respectively connected to the water inlet and the water outlet. The cooling pipe is arranged around the high-temperature component and the main shaft motion component of the lower specimen of the testing machine.

10. A high temperature control device for a control valve seal pair local friction simulation test machine according to claim 9, characterized in that: The cooling pipeline also passes through the testing machine loading test bench to perform surrounding cooling on the testing machine lower specimen spindle motion assembly located at the lower part of the testing machine loading test bench.

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