CN116818207B - Device and method for detecting air tightness of hydraulic element - Google Patents
Device and method for detecting air tightness of hydraulic element Download PDFInfo
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Abstract
The application relates to a device and a method for detecting the air tightness of a hydraulic element, belonging to the technical field of machine manufacturing and mechanical equipment detection. The application provides a device and a method for detecting the air tightness performance of a hydraulic element, which simulate the operation of the hydraulic element and detect the air tightness, wherein the device comprises a water tank and a lifting mechanism, the lifting mechanism is arranged on the outer side surface of the water tank and consists of a speed reduction motor I, a guide frame, a screw rod I and a mounting frame, the speed reduction motor I provides power to drive the screw rod I to rotate so as to realize the vertical movement of the mounting frame, and the guide frame provides a guide function for the mounting frame and also comprises a pressure applying mechanism. According to the application, the gravity is applied to the telescopic end of the hydraulic element, so that the working state of the hydraulic element is simulated, the air tightness of the hydraulic element can be more accurately judged, and the detection result is more accurate.
Description
Technical Field
The application relates to a device and a method for detecting the air tightness of a hydraulic element, belonging to the technical field of machine manufacturing and mechanical equipment detection.
Background
A complete hydraulic system consists of five parts, namely a power element, an actuator element, a control element, an auxiliary element and a hydraulic medium. The power element is used for converting mechanical energy of the prime motor into pressure energy of liquid, namely an oil pump in the hydraulic system, and provides power for the whole hydraulic system. The hydraulic pump is generally structured in the form of a gear pump, a vane pump and a plunger pump. The function of the actuating element (such as a hydraulic cylinder and a hydraulic motor) is to convert the pressure energy of the liquid into mechanical energy and drive the load to do linear reciprocating motion or rotary motion, and in order to ensure the use of the actuating element and the quality of the product, the air tightness performance of the hydraulic actuating element needs to be detected.
Patent application publication number CN116358792A discloses a device and a method for detecting the air tightness of an oil way hydraulic element, relates to the technical field of air tightness detection equipment, and comprises the following components: a workbench and a positioning mechanism; the liquid storage box body is arranged on the workbench and used for bearing detection liquid; the positioning mechanism comprises: the sealing ends are oppositely arranged on the workbench; the driving mechanism is connected with the sealing end and used for driving the sealing end to horizontally move; the central end of the sealing end is provided with a through hole, and one side of the through hole is connected with an air inlet mechanism for introducing compressed air into the pipeline; further comprises: the lifting mechanism is used for driving the pipeline to be immersed in the detection liquid for tightness detection, any leakage point on the pipeline can be detected, meanwhile, the position where the bubble appears in the detection liquid can be used for judging where the pipeline leaks, and the accuracy is higher. When this application carries out the gas tightness detection to the pipeline, at first plug up the both ends of pipeline, then inject compressed air to the pipeline in, put into the liquid through elevating system with the pipeline, through observing the bubble, judge the gas tightness of pipeline, such detecting means can not simulate the state of hydraulic component work, and hydraulic component is in the in-process of work, needs to carry out the bearing, consequently only under the bearing state, just can be accurate test out hydraulic component's gas tightness.
Disclosure of Invention
In order to overcome the defect that the current hydraulic element is not tested by simulating the working state of the hydraulic element when the air tightness is detected, the device and the method for detecting the air tightness performance of the hydraulic element are provided for simulating the working of the hydraulic element and detecting the air tightness.
The device for detecting the air tightness of the hydraulic element comprises a water tank and a lifting mechanism, wherein the lifting mechanism is arranged on the outer side surface of the water tank and consists of a speed reducing motor I, a guide frame, a screw rod I and a mounting frame, the screw rod I is driven to rotate by supplying power to the speed reducing motor I, so that the vertical movement of the mounting frame is realized, the guide frame provides a guide function for the mounting frame, the device also comprises a pressure applying mechanism, the lifting mechanism is provided with the pressure applying mechanism, and the pressure applying mechanism consists of a screw rod II, a lifting frame, an optical axis and an object placing frame; the screw rod II is vertically rotatably arranged on the upper portion of the mounting frame, a lifting frame extending towards the middle of the water tank is vertically connected to the upper portion of the mounting frame in a sliding mode, the lifting frame is in threaded connection with the screw rod II, a vertical sliding optical axis is arranged on the lifting frame, and an object placing frame is connected to the top end of the optical axis.
More preferably, the object placing frame is detachably connected with the top end of the optical axis, and the object placing frames with different sizes are replaced according to the requirement of the tested object.
More preferably, the device also comprises an end fixing mechanism, wherein the end fixing mechanism is arranged at the lower part of the mounting frame and consists of a guide rod, a hollow pipe, a sliding plate, a profiling cutting sleeve and a spring; at least two guide rods are installed on the lower portion of the installation frame, the end portions of the guide rods are all connected with hollow tubes in a sliding mode, springs are connected between the hollow tubes and the guide rods which are connected in a sliding mode, sliding plates are connected between the hollow tubes on the same side, and profiling clamping sleeves are connected to the sides, close to each other, of the sliding plates.
More preferably, the device further comprises a swinging assembly for driving the hydraulic element to swing in detection, wherein the swinging assembly comprises a swinging mechanism, a limiting mechanism and a friction force reducing mechanism.
More preferably, the swing mechanism of one of the swing assembly components consists of a waterproof gear motor II, a 30-tooth gear, a sliding rod, a U-shaped rod and a 30-tooth rack; waterproof gear motor II installs in the mounting bracket lower part, waterproof gear motor II's output shaft upper key is connected with 30 tooth gears, mounting bracket lower part slidable mounting has the slide bar, the slide bar has 30 tooth racks with 30 tooth gear engagement, one side symmetry that the slide bar is close to the water tank installs two U-shaped poles, the U-shaped pole is walked around the mounting bracket side, extends to the top of water tank.
More preferably, a limiting mechanism of one of the swing assembly components is arranged between the mounting frame and the water tank and used for limiting the rotation point of the hydraulic element, and the limiting mechanism consists of a special-shaped track, a clamping shaft and a concave block; the water tank is internally provided with a special-shaped track on one side close to the mounting frame, the lower part of the mounting frame is slidably connected with a clamping shaft, one end, close to the special-shaped track, of the clamping shaft is connected with a concave block, and the concave block is slidably connected with the special-shaped track through a roller.
More preferably, a friction force reducing mechanism of the swing assembly is installed at the bottom end of the optical axis, the friction force reducing mechanism is composed of an arc-shaped track installed at the bottom end of the optical axis and a sliding block in sliding connection with the arc-shaped track, and a limiting hole is formed in the sliding block.
More preferably, the device further comprises an instant force increasing mechanism, wherein the instant force increasing mechanism is arranged on the lifting frame and consists of an air cylinder arranged on the lifting frame for providing downward power and a pressing block arranged at the telescopic end of the air cylinder and partially overlapped with the object placing frame in the vertical direction.
More preferably, the device further comprises a control mechanism, wherein the control mechanism is arranged on the side face of the water tank and consists of a pneumatic combined element arranged on the side face of the water tank and an electromagnetic valve arranged on the side face of the pneumatic combined element, and the electromagnetic valve is connected with the pneumatic combined element through an air pipe.
The method for detecting the air tightness performance of the hydraulic element comprises the following specific steps:
s1, placing a hydraulic element to be detected on a lifting mechanism (2), and injecting compressed gas into the hydraulic element through a control mechanism (9);
s2, after the pressure is applied to the working end of the hydraulic element through the pressure applying mechanism (3), the hydraulic element is soaked in water through the lifting mechanism (2), whether bubbles are generated on the surface of the hydraulic element or not is observed, and the occurrence of the bubbles represents disqualification;
s3, in the process of detecting the hydraulic element in water, slowly swinging the hydraulic element through a swinging assembly, and observing whether the hydraulic element leaks air or not in a swinging rotation state;
s4, in the hydraulic element detection process, the hydraulic element is pressurized instantly through the instant force increasing mechanism (8), whether the hydraulic element has air leakage in a burst state or not is detected, and after triple test, the hydraulic element does not leak air, and the hydraulic element is qualified.
The application has the beneficial effects that: according to the application, the gravity is applied to the telescopic end of the hydraulic element, so that the working state of the hydraulic element is simulated, the air tightness of the hydraulic element can be more accurately judged, and the detection result is more accurate;
in the process of testing the air tightness of the hydraulic element, the position of the hydraulic element is continuously changed in a swinging mode, the hydraulic element is detected, the detection result is more convincing, and the quality of the hydraulic element can be ensured;
according to the application, the pressure born by the hydraulic element is instantaneously increased through the instantaneous force increasing mechanism, so that whether the tightness is affected or not under an emergency condition is tested, and the accuracy of a detection result is improved;
according to the application, through the pneumatic combined original, the pressure of the injected gas can be known, the gas injection pressure is regulated and filtered, the functions of the device are more comprehensive, and the use is more convenient.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:
fig. 1 shows a schematic perspective view of the present application.
Fig. 2 shows a schematic perspective view of the lifting mechanism of the application.
Fig. 3 shows a schematic perspective view of the pressure applying mechanism of the present application.
Fig. 4 shows a schematic perspective view of the end fixing mechanism of the present application.
Fig. 5 shows an enlarged view of the end fixing mechanism of the present application.
Fig. 6 shows a schematic perspective view of the swing mechanism of the present application.
Fig. 7 shows an enlarged view of the swing mechanism of the present application.
Fig. 8 shows a schematic perspective view of the limiting mechanism of the present application.
Fig. 9 shows an enlarged view of the spacing mechanism of the present application.
Fig. 10 is a schematic perspective view showing the friction force reducing mechanism and the instantaneous force increasing mechanism of the present application.
Fig. 11 is a schematic perspective view showing the friction force reducing mechanism of the present application.
Fig. 12 shows a schematic perspective view of the control mechanism of the present application.
Reference numerals in the figures: 1. the device comprises a water tank, 2, a lifting mechanism, 21, a gear motor I, 22, a guide frame, 23, a screw rod I, 24, a mounting frame, 3, a pressure applying mechanism, 31, a screw rod II, 32, a lifting frame, 33, an optical axis, 34, an object placing frame, 4, an end fixing mechanism, 41, a guide rod, 42, a hollow tube, 43, a sliding plate, 44, a profiling clamping sleeve, 45, a spring, 5, a swinging mechanism, 51, a waterproof gear motor II, 52, 30, a gear, 53, a sliding rod, 54, a U-shaped rod, 55, 30, a rack, 6, a limiting mechanism, 61, a special-shaped track, 62, a clamping shaft, 63, a concave block, 7, a friction force reducing mechanism, 71, an arc-shaped track, 72, a sliding block, 8, an instantaneous force increasing mechanism, 81, a cylinder, 82, a pressing block, 9, a control mechanism, 91, a pneumatic combination original, 92 and an electromagnetic valve.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the application, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Example 1: 1-3, the device comprises a water tank 1, a lifting mechanism 2 and a pressure applying mechanism 3, wherein the lifting mechanism 2 is arranged on the outer side surface of the water tank 1, and the pressure applying mechanism 3 is arranged on the lifting mechanism 2.
Referring to fig. 1 and 2, elevating system 2 is including gear motor i 21, leading truck 22, lead screw i 23 and mounting bracket 24, gear motor i 21 passes through bolt fixed connection at water tank 1 right flank, leading truck 22 passes through bolt fixed mounting at the water tank 1 right flank of gear motor i 21 top, leading truck 22 with gear motor i 21 is in vertical direction coincidence, the middle part of the vertical direction of leading truck 22 is connected with lead screw i 23 through the bearing frame rotation, the tip of lead screw i 23 passes through shaft coupling and gear motor i 21 output shaft, there is mounting bracket 24 through threaded connection on the lead screw i 23, mounting bracket 24 with leading truck 22 sliding connection, mounting bracket 24 with water tank 1 is in vertical direction partial coincidence.
Referring to fig. 1 and 3, the pressure applying mechanism 3 includes a screw rod ii 31, a lifting frame 32, an optical axis 33 and an object placing frame 34, the screw rod ii 31 is vertically rotatably installed on the upper portion of the installation frame 24 through a bearing seat, the lifting frame 32 is horizontally installed in a sliding manner on the upper portion of the installation frame 24, the lifting frame 32 extends towards the middle portion of the water tank 1, the lifting frame 32 is in threaded connection with the screw rod ii 31, the optical axis 33 is vertically slidably installed in the middle portion of the lifting frame 32, the top end of the optical axis 33 is detachably connected with the object placing frame 34 through a bolt, and the object placing frame 34 can replace the object placing frames 34 with different sizes according to the model of hydraulic elements.
When the device is used for detecting the air tightness of the hydraulic element, enough water is added into the water tank 1, then the hydraulic element is placed on the mounting frame 24 of the lifting mechanism 2, the telescopic end of the hydraulic element is placed upwards, then the position of the pressure applying mechanism 3 is adjusted, and an equal weight object is placed in the object placing frame 34 according to the gravity required to be borne by the hydraulic element during operation, then air is injected into the hydraulic element, the telescopic end of the hydraulic element is jacked upwards and contacted with the bottom end of the optical axis 33, the optical axis 33 and the object placing frame 34 thereon are pushed to move upwards, then the speed reducing motor I21 of the lifting mechanism 2 drives the screw rod I23 to rotate, so that the mounting frame 24 moves downwards, the hydraulic element is immersed in the water tank 1, whether the hydraulic element has bubbles to emerge or not is observed, if the bubbles emerge, the air tightness of the hydraulic element is unqualified, the speed reducing motor I21 of the lifting mechanism 2 drives the screw rod I23 to rotate upwards to reset according to the gravity required to the operation of the hydraulic element, then the hydraulic element is taken down, the telescopic end of the hydraulic element is jacked, the gravity is applied to the telescopic end of the hydraulic element, the state of the hydraulic element is pushed, the screw rod I23 is driven, the state of the hydraulic element is simulated, and the air tightness of the hydraulic element can be detected more accurately.
Referring to fig. 4 and 5, the end fixing mechanism 4 is further included, the end fixing mechanism 4 is installed at the lower portion of the mounting frame 24, the end fixing mechanism 4 comprises a guide rod 41, a hollow tube 42, a sliding plate 43, a profiling clamping sleeve 44 and a spring 45, two guide rods 41 parallel to the lower portion of the mounting frame 24 are horizontally installed at the lower portion of the mounting frame 24, the end portions of the guide rods 41 are all slidably connected with the hollow tube 42, the spring 45 is connected between the hollow tube 42 and the guide rods 41 which are slidably connected with the hollow tube 42, the sliding plate 43 is fixedly connected between the hollow tubes 42 on the same side through bolts, and the profiling clamping sleeve 44 is connected to one side, close to each other, of the sliding plates 43.
Before the hydraulic component is placed on the mounting frame 24, the sliding plate 43 is separated outwards, the spring 45 is compressed, then the lower part of the hydraulic component is placed between the profiling clamping sleeves 44, then the sliding plate 43 is loosened, under the reset action of the spring 45, the profiling clamping sleeves 44 are driven to move towards the middle for reset, and the lower part of the hydraulic component is clamped, so that the subsequent detection is facilitated.
Referring to fig. 6 and 11, the swinging mechanism 5, the limiting mechanism 6 and the friction force reducing mechanism 7 form a swinging assembly, the swinging mechanism 5 is installed at the lower part of the mounting frame 24, the swinging mechanism 5 is above the end fixing mechanism 4, the swinging mechanism 5 comprises a waterproof gear motor ii 51, a 30-tooth gear 52, a sliding rod 53, a U-shaped rod 54 and a 30-tooth rack 55, the waterproof gear motor ii 51 is fixedly installed at the lower part of the mounting frame 24 through bolts, a 30-tooth gear 52 is connected to an output shaft of the waterproof gear motor ii 51 in a key manner, a sliding rod 53 perpendicular to the lower part of the mounting frame 24 is slidably installed at the lower part of the mounting frame, a 30-tooth rack 55 meshed with the 30-tooth gear 52 is fixedly installed on the sliding rod 53, two U-shaped rods 54 are symmetrically installed at one side, close to the water tank 1, of the sliding rod 53 bypasses the side of the mounting frame 24, and extends to the upper part of the water tank 1.
Referring to fig. 8 and 9, the limiting mechanism 6 is installed between the mounting frame 24 and the water tank 1 and is used for limiting the rotation point of the hydraulic element, the limiting mechanism 6 comprises a special-shaped rail 61, a clamping shaft 62 and a concave block 63, the special-shaped rail 61 is fixedly connected to one side, close to the mounting frame 24, in the water tank 1 through bolts, the clamping shaft 62 is slidably connected to the lower portion of the mounting frame 24, the concave block 63 is connected to one end, close to the special-shaped rail 61, of the clamping shaft 62, and the concave block 63 is slidably connected with the special-shaped rail 61 through a roller.
Referring to fig. 10 and 11, the friction force reducing mechanism 7 is mounted at the bottom end of the optical axis 33, the friction force reducing mechanism 7 includes an arc-shaped rail 71 mounted at the bottom end of the optical axis 33, and a slider 72 slidably connected with the arc-shaped rail 71, and a limiting hole is formed in the slider 72.
When the hydraulic element is detected, the telescopic end of the hydraulic element stretches into the sliding block 72, meanwhile, when the mounting frame 24 moves downwards, the concave block 63 is driven to move towards the hydraulic element due to the existence of the special-shaped track 61, the clamping shaft 62 is inserted into a round hole below the hydraulic element, after the hydraulic element enters into water, the waterproof speed reduction motor II 51 can be controlled to rotate positively and negatively, the 30-tooth gear 52 is driven to rotate positively and negatively, the 30-tooth rack 55 is driven to slide forwards and backwards, the U-shaped rod 54 slides forwards and backwards, the hydraulic element is driven to swing around the clamping shaft 62, meanwhile, the top of the hydraulic element is not affected when swinging due to the action of the arc-shaped track 71 and the sliding block 72, meanwhile, the telescopic end of the hydraulic element still has pressure, the hydraulic element continuously changes the position of the hydraulic element in the air tightness testing process, the detection result is more convincer, the quality of the hydraulic element can be guaranteed, and after the air tightness detection of the hydraulic element is finished, the waterproof speed reduction motor II 51 is controlled to stop working.
Referring to fig. 10, the device further comprises an instantaneous force increasing mechanism 8, the instantaneous force increasing mechanism 8 is mounted on the lifting frame 32, the instantaneous force increasing mechanism 8 comprises an air cylinder 81 and a pressing block 82, the air cylinder 81 is fixedly connected to the lifting frame 32 through a bolt, a pressing block 82 is connected to the telescopic end of the air cylinder 81 through a floating joint, and the pressing block 82 is partially overlapped with the object placing frame 34 in the vertical direction.
In the process of detecting the air tightness of the hydraulic element, the air cylinder 81 can drive the pressing block 82 to move downwards, the pressing block 82 moves downwards to be in contact with the object placing frame 34, downward pressure is applied to the object placing frame 34, so that the pressure of the object placing frame 34 is instantaneously increased, whether air leakage occurs in the hydraulic element is checked at the moment, then the air cylinder 81 is controlled to drive the pressing block 82 to move upwards for resetting, and whether the tightness is affected under an emergency is tested by instantaneously increasing the pressure born by the hydraulic element, so that the accuracy of a detection result is improved.
Referring to fig. 12, the air conditioner further comprises a control mechanism 9, the control mechanism 9 is installed on the side face of the water tank 1, the control mechanism 9 comprises a pneumatic assembly element 91 and an electromagnetic valve 92, the pneumatic assembly element 91 comprises a pressure reducing valve, an air filter and an oil mist filter, the electromagnetic valve 92 is installed on the water tank 1, and the electromagnetic valve 92 is connected with the pneumatic assembly element 91 through an air pipe.
This device is from taking pneumatic combination original paper 91 and solenoid valve 92, when testing hydraulic component gas tightness, can be directly be connected with the air pump through the trachea, will wait to test the hydraulic component simultaneously and solenoid valve 92 pass through the trachea and be connected, through solenoid valve 92 control gas injection, through pneumatic combination original paper 91, can know the pressure of injection gas to adjust and filter gas injection pressure, the equipment function is more comprehensive, and it is more convenient to use.
The method for detecting the air tightness performance of the hydraulic element comprises the following specific steps:
s1, placing a hydraulic element to be detected on a lifting mechanism 2, and injecting compressed gas into the hydraulic element through a control mechanism 9;
s2, after the pressure is applied to the working end of the hydraulic element through the pressure applying mechanism 3, the hydraulic element is soaked in water through the lifting mechanism 2, whether bubbles are generated on the surface of the hydraulic element or not is observed, and the occurrence of the bubbles represents disqualification;
s3, in the process of detecting the hydraulic element in water, slowly swinging the hydraulic element through a swinging assembly, and observing whether the hydraulic element leaks air or not in a swinging rotation state;
s4, in the hydraulic element detection process, the hydraulic element is pressurized instantly through the instant force increasing mechanism 8, whether the hydraulic element has air leakage in an abrupt state or not is detected, and after triple test, the hydraulic element does not leak air, and the hydraulic element is qualified.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
In the description of the present application, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present application; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
Claims (3)
1. The utility model provides a hydraulic component's gas tightness performance detection device, including water tank (1) and elevating system (2), elevating system (2) are installed to water tank (1) lateral surface, elevating system comprises gear motor I (21), leading truck (22), lead screw I (23) and mounting bracket (24), through gear motor I (21) provide power, drive lead screw I (23) rotate, realize the vertical movement of mounting bracket (24), wherein leading truck (22) do mounting bracket (24) provide the guide effect, characterized by:
the device also comprises a pressure applying mechanism (3), wherein the pressure applying mechanism (3) is arranged on the lifting mechanism (2), and the pressure applying mechanism (3) consists of a screw rod II (31), a lifting frame (32), an optical axis (33) and an object placing frame (34);
the screw rod II (31) is vertically and rotatably arranged on the upper part of the mounting frame (24), a lifting frame (32) extending towards the middle part of the water tank (1) is vertically and slidably connected on the upper part of the mounting frame (24), the lifting frame (32) is in threaded connection with the screw rod II (31), an optical axis (33) vertically sliding is arranged on the lifting frame (32), and the top end of the optical axis (33) is connected with an object placing frame (34);
the device also comprises an end fixing mechanism (4), wherein the end fixing mechanism (4) is arranged at the lower part of the mounting frame (24), and the end fixing mechanism (4) consists of a guide rod (41), a hollow tube (42), a sliding plate (43), a profiling cutting sleeve (44) and a spring (45);
at least two guide rods (41) are arranged at the lower part of the mounting frame (24), the end parts of the guide rods (41) are respectively and slidably connected with a hollow tube (42), a spring (45) is connected between the hollow tube (42) and the guide rods (41) which are slidably connected with the hollow tube, a sliding plate (43) is commonly connected between the hollow tubes (42) on the same side, and one sides, close to each other, of the sliding plates (43) are respectively connected with a profiling clamping sleeve (44);
the device also comprises a swinging assembly for driving the hydraulic element to swing in detection, wherein the swinging assembly comprises a swinging mechanism (5), a limiting mechanism (6) and a friction force reducing mechanism (7);
the swinging mechanism (5) of one of the swinging component parts consists of a waterproof gear motor II (51), a 30-tooth gear (52), a sliding rod (53), a U-shaped rod (54) and a 30-tooth rack (55);
the waterproof speed reducing motor II (51) is arranged at the lower part of the mounting frame (24), a 30-tooth gear (52) is connected to an output shaft of the waterproof speed reducing motor II (51) in a key manner, a sliding rod (53) is slidably arranged at the lower part of the mounting frame (24), the sliding rod (53) is provided with a 30-tooth rack (55) meshed with the 30-tooth gear (52), two U-shaped rods (54) are symmetrically arranged at one side, close to the water tank (1), of the sliding rod (53), and the U-shaped rods (54) bypass the side face of the mounting frame (24) and extend to the upper part of the water tank (1);
a limiting mechanism (6) of one of the swing assembly components is arranged between the mounting frame (24) and the water tank (1) and used for limiting the rotation point of the hydraulic element, and the limiting mechanism (6) consists of a special-shaped track (61), a clamping shaft (62) and a concave block (63);
a special-shaped track (61) is arranged on one side, close to the mounting frame (24), in the water tank (1), a clamping shaft (62) is connected to the lower portion of the mounting frame (24) in a sliding manner, a concave block (63) is connected to one end, close to the special-shaped track (61), of the clamping shaft (62), and the concave block (63) is connected with the special-shaped track (61) in a sliding manner through a roller;
one friction force reducing mechanism (7) of the swing assembly components is arranged at the bottom end of the optical axis (33), the friction force reducing mechanism (7) is composed of an arc-shaped track (71) arranged at the bottom end of the optical axis (33) and a sliding block (72) in sliding connection with the arc-shaped track (71), and a limiting hole is formed in the sliding block (72);
the device also comprises an instantaneous force increasing mechanism (8), wherein the instantaneous force increasing mechanism (8) is arranged on the lifting frame (32), and the instantaneous force increasing mechanism (8) consists of an air cylinder (81) which is arranged on the lifting frame (32) and provides downward power and a pressing block (82) which is arranged at the telescopic end of the air cylinder (81) and is partially overlapped with the object placing frame (34) in the vertical direction;
the automatic water tank is characterized by further comprising a control mechanism (9), wherein the control mechanism (9) is arranged on the side face of the water tank (1), the control mechanism (9) consists of a pneumatic combined original (91) arranged on the side face of the water tank (1) and an electromagnetic valve (92) arranged on the side face of the pneumatic combined original, and the electromagnetic valve (92) is connected with the pneumatic combined original (91) through an air pipe.
2. The air tightness testing device for hydraulic components according to claim 1, wherein: the object placing rack (34) is detachably connected with the top end of the optical axis (33), and the object placing racks (34) with different sizes are replaced according to the requirement of a tested object.
3. A method for detecting the air tightness of a hydraulic component, which is characterized by comprising the following specific steps of:
s1, placing a hydraulic element to be detected on a lifting mechanism (2), and injecting compressed gas into the hydraulic element through a control mechanism (9);
s2, after the pressure is applied to the working end of the hydraulic element through the pressure applying mechanism (3), the hydraulic element is soaked in water through the lifting mechanism (2), whether bubbles are generated on the surface of the hydraulic element or not is observed, and the occurrence of the bubbles represents disqualification;
s3, in the process of detecting the hydraulic element in water, slowly swinging the hydraulic element through a swinging assembly, and observing whether the hydraulic element leaks air or not in a swinging rotation state;
s4, in the hydraulic element detection process, the hydraulic element is pressurized instantly through the instant force increasing mechanism (8), whether the hydraulic element has air leakage in a burst state or not is detected, and after triple test, the hydraulic element does not leak air, and the hydraulic element is qualified.
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