CN114704520B

CN114704520B - A self-heating rapid hydraulic cylinder

Info

Publication number: CN114704520B
Application number: CN202111634284.6A
Authority: CN
Inventors: 涂雪龙; 涂佳欣; 涂佳丽
Original assignee: Ningbo Xuelongwang Hydraulic Technology Co ltd
Current assignee: Ningbo Xuelongwang Hydraulic Technology Co ltd
Priority date: 2021-12-29
Filing date: 2021-12-29
Publication date: 2025-11-18
Anticipated expiration: 2041-12-29
Also published as: CN114704520A

Abstract

The application relates to a hydraulic cylinder, in particular to a self-heat-dissipation quick cylinder, which solves the problems of complex structure, small volume and too high temperature rise during long-time working of the quick hydraulic cylinder in the prior art. The self-heat-dissipation rapid oil cylinder provided by the application is provided with the double pistons and the cooling channels, so that the oil cylinder can realize self cooling while working efficiently, and the oil cylinder has long service life. In addition, the self-heat-dissipation quick oil cylinder also has excellent sealing performance, and leakage can not occur even if the self-heat-dissipation quick oil cylinder works under higher pressure. In general, the self-heat-dissipation quick oil cylinder provided by the application has the advantages of reasonable design, compact volume, low energy consumption, simple structure, excellent stability and reliability, and can realize the effect of self-cooling of the cylinder body while realizing quick output, thereby meeting the requirements of actual production.

Description

Self-heat-dissipation quick oil cylinder

Technical Field

The present disclosure relates to hydraulic cylinders, and more particularly to a self-cooling fast cylinder.

Background

In recent years, the hydraulic industry in China goes through the processes from imitation to independent research and development, from import to self-sufficiency, a hydraulic cylinder is used as a main hydraulic element, oil is used as a working medium, motion is transmitted through the change of a sealing volume, and power is transmitted through the pressure in the oil. With the rapid development of the whole industry, a road for the rapid development is also provided. The hydraulic cylinder is an executive component for converting hydraulic energy into mechanical energy in a hydraulic system, is a special component for various coal mine machines, engineering machines, special vehicles and large-scale machines, has a significant position in industrial production, and can be used for forging machines, machine tools, injection molding machines, mining machines, robots, processing centers, packaging machines and the like.

In the modern society with high mechanization, along with the continuous healthy and rapid development of economy in China, the construction of various major infrastructures enters a new trend, the demand of engineering machinery is greatly increased, and meanwhile, new requirements are put on the oil cylinder, such as the requirement of the oil cylinder on some mechanical equipment for faster response speed. When the hydraulic cylinder is large in mass or load, the movement speed is high, and when the hydraulic cylinder is used, the moment of momentum is large due to the large inertia force, and under the condition, the piston can directly collide with the end cover mechanically when moving to the terminal end of the cylinder barrel, so that large impact and noise can be generated, and the machining precision can be directly influenced.

The application number is 202110289786.3, provides a novel fast acting hydraulic cylinder with an accumulator, which comprises a fast cylinder body, an accumulator body and a second oil sprayer. According to the hydraulic cylinder, the quick cylinder body and the energy accumulator body are matched with each other to work, the energy accumulator body is matched with the quick cylinder body to pressurize the quick cylinder body, the quick cylinder body is required to be matched with the energy accumulator to be used together, the speed of the piston rod is faster, the sealing piece is a high-speed sealing piece, the highest speed of the piston rod can reach 15m/s, an instant rising pressure can be generated in the extending process of the piston rod, then the energy accumulator body absorbs energy of the part, the quick cylinder body is supplied, the force for pushing the piston rod is increased, so that the movement speed of the piston rod is faster, the energy consumption is lower, on the basis, the oil is injected into the energy accumulator body through the first oil injector and the second oil injector in the extending process of the piston rod, the energy storage energy in the energy accumulator body is improved, stronger power is provided for the quick cylinder, and the movement speed of the piston rod is further accelerated. However, the hydraulic cylinder provided by the application must be combined with an accumulator to achieve the effect of rapid operation, and the accumulator occupies a certain volume and is not suitable for being used in a narrow space.

The invention discloses a quick oil cylinder with an authorized bulletin number of CN110500334B, which comprises a cylinder body, an upper cylinder cover, a piston body, a lower cylinder cover, a sequence valve, a three-position three-way pilot operated reversing valve, a first interface, a second interface, a third interface, a first control port and a second control port, wherein the upper end of the cylinder body is provided with a second oil port, the upper cylinder cover comprises a piston head and a piston rod, a guide hole is arranged in the piston body, a compensation piston is arranged in the cylinder body in a sliding manner, the lower cylinder cover is provided with a first oil port at the lower end, the sequence valve is arranged at the upper end of the piston rod, and the three-position three-way pilot operated reversing valve is arranged in the lower cylinder cover. In general, the invention has simple structure and compact volume, does not need an external liquid filling oil tank, a liquid filling valve and a pump group, and can automatically realize fast forward and slow working conversion and pressure relief. However, when the oil cylinder moves rapidly, the temperature in the cylinder body is inevitably increased greatly, so that the local temperature of the oil cylinder is too high, the aging of a sealing element is accelerated due to the too high temperature, the sealing performance is reduced, the phenomena of leakage and oil seepage occur in the later stage, the cleaning is difficult, and the service life of the oil cylinder is also reduced.

In summary, although the prior art solves the problem of slow reciprocation rate of the oil cylinder, the problem needs to be realized by means of additional equipment, which results in the overlarge volume and complicated structure of the whole hydraulic oil cylinder and makes the hydraulic oil cylinder difficult to use in a narrow space. In addition, the temperature rise of the cylinder body of the oil cylinder can not be controlled while the oil cylinder can not be rapidly output in the prior art. Therefore, in order to meet the actual production requirement, it is necessary to adopt a practical method to accelerate the quick output of the oil cylinder and effectively cool the oil cylinder.

Disclosure of Invention

The utility model provides a from quick hydro-cylinder of heat dissipation to the quick hydraulic cylinder structure complicacy among the prior art, the volume is not small and exquisite enough, long-time work temperature rise too high problem. The self-heat-dissipation quick oil cylinder is reasonable in design, compact in size, simple in structure, high in stability and long in service life, can realize the effect of self-cooling of the cylinder body when rapidly outputting, and meets the requirements of actual production.

One of the concepts of the present disclosure is to provide a self-cooling quick cylinder, which is provided with a cooling channel, and a cooling medium in the cooling channel plays a role in cooling and lubricating at the same time, so that the self-cooling of a cylinder body of the self-cooling quick cylinder can be realized while quick output is realized.

The other conception of the disclosure is that the self-heat-dissipation quick oil cylinder is provided with a reset mechanism, and the reset mechanism can improve the working efficiency and stability of the oil cylinder.

The other conception of the disclosure is that the self-heat-dissipation quick oil cylinder is characterized in that a first piston and a second piston are arranged in a cylinder body, the two pistons are of a series structure and work cooperatively, so that the reaction time of a reset mechanism can be greatly shortened, the round trip speed of the oil cylinder is accelerated, and the working efficiency of the oil cylinder is improved.

The self-heat-dissipation quick oil cylinder comprises a cylinder body, wherein a second cavity is formed in the upper end of the cylinder body, and a second piston is arranged in the second cavity.

The cylinder body is provided with a second oil inlet/outlet which is communicated with the second cavity.

In some embodiments, the cylinder body upper end is provided with the arch, and the second cavity is provided inside the arch.

The cylinder body inside be provided with first cavity, be provided with first piston in the first cavity, the cylinder body on be provided with first oil inlet/outlet, first oil inlet/outlet and first cavity intercommunication.

The cylinder body on be provided with cooling channel and slide, slide and first cavity intercommunication.

The first piston and the second piston keep synchronous operation in the oil cylinder work, and have higher round trip rate than a single piston when acting together.

Further, one side of the first piston is provided with a reset rod, the other side of the first piston is provided with a piston rod, and the second piston is arranged on one side of the reset rod.

The reset rod is connected to the slideway in a sliding way, and the free end of the reset rod is positioned at the outer side of the cylinder body.

The cooling channel is positioned at one side of the cylinder body, which is provided with a slideway.

The cooling channel comprises a liquid inlet channel and a liquid outlet channel, and the liquid inlet channel and the liquid outlet channel are both communicated with the slideway. The cooling medium enters the slideway from the liquid inlet channel and flows out from the liquid outlet channel. The cooling channel can form an annular structure surrounding the first cavity in the slideway, and has larger heat absorption area and excellent cooling effect. The inner wall of the slideway is provided with a first sealing element and a second sealing element which are used for preventing the leakage of a working medium.

The sealing means is one of the indispensable means of the hydraulic system, and the sealing is to prevent leakage of the working medium, including internal leakage and external leakage, and in addition, the sealing is to prevent air, dust, etc. from entering the hydraulic element and the hydraulic system. Although the sealing element is an auxiliary element in the hydraulic system, the sealing and the sealing device are one of key components which directly influence whether the hydraulic system can work normally, the sealing element is limited to a certain extent in terms of improvement of the performance and the reliability of the hydraulic element and the hydraulic system and the service life, and the sealing device are one of main factors of the quality difference of the hydraulic elements at home and abroad. Often the loss caused by failure of individual seals can be tens of thousands of times the value of the seal itself.

In some embodiments, the sealing device further comprises a third seal.

In some embodiments, even if the seal is damaged, no leakage of working medium is caused, which can flow out of the liquid outlet channel.

The inner wall of the slideway is provided with a guide sleeve, and the guide sleeve is positioned between the first sealing piece and the second sealing piece. The guide sleeve provides a support for the oil seal of the oil cylinder port, and more importantly, the guide sleeve plays a role in supporting and guaranteeing coaxiality of the reset rod and the cylinder body, and the guide sleeve is high in matching precision, small in friction resistance and good in wear resistance, and can bear pressure, bending force and impact movement of the reset rod.

In some embodiments, the cooling channel is located on the side of the cylinder body where the slide way is located, away from the piston rod.

In some embodiments, the free end of the reset lever is provided with a reset mechanism and a limiting block, and the limiting block is used for limiting the reset mechanism.

Further, the limiting block is provided with at least one working hole, so that the limiting block is convenient to detach and install.

Compared with the existing products, the method has the advantages that:

(1) The self-heat-dissipation quick oil cylinder is reasonable in design, simple to assemble, low in energy consumption and high in reliability;

(2) The self-heat-dissipation rapid oil cylinder is provided with the double pistons, the two pistons are in a series structure, and the two pistons work cooperatively, so that the self-heat-dissipation rapid oil cylinder has a stable structure and high working efficiency;

(3) The self-heat-dissipation rapid oil cylinder is provided with the cooling channel, so that the oil cylinder can be cooled while working efficiently, and the oil cylinder has long service life;

(4) The self-heat-dissipation quick oil cylinder has excellent sealing performance, and can not leak even if working under higher pressure.

Drawings

The application will be described in further detail below in connection with the drawings and the preferred embodiments, but it will be appreciated by those skilled in the art that these drawings are drawn for the purpose of illustrating the preferred embodiments only and thus should not be taken as limiting the scope of the application. Moreover, unless specifically indicated otherwise, the drawings are merely schematic representations, not necessarily to scale, of the compositions or constructions of the described objects and may include exaggerated representations.

FIG. 1 is a schematic perspective view of a self-cooling fast cylinder of the present disclosure;

FIG. 2 is a schematic diagram of a self-cooling cylinder according to the second embodiment of the present disclosure;

FIG. 3 is a third perspective view of a self-cooling fast cylinder according to the present disclosure;

Fig. 4 is a schematic cross-sectional view of a self-dissipating quick cylinder of the present disclosure.

Reference numerals illustrate:

1. The hydraulic cylinder comprises a locking nut, a limiting block, a reset mechanism, a liquid inlet channel, a second oil inlet/outlet, a first oil inlet/outlet, a working hole, a liquid outlet channel, a first oil inlet/outlet, a working hole, a second oil inlet/outlet, a liquid outlet channel, a limiting block protrusion, a cylinder protrusion, 100 parts, a second piston, 101 parts, a first sealing element, 102 parts, a second sealing element, 103 parts, a third sealing element, 104 parts, a guide sleeve, 105 parts, a slideway, 200 parts, a first piston, 300 parts, a reset rod, 400 parts and a piston rod.

Detailed Description

In order to better understand the technical solutions of the present disclosure, the present disclosure will be described in detail, clearly and completely with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present disclosure.

An embodiment of the disclosure discloses a self-heat-dissipation quick oil cylinder, which is shown in fig. 1, 2, 3 and 4.

The self-heat-dissipation quick oil cylinder comprises a cylinder body, wherein the upper end of the cylinder body is provided with a protrusion 12, a second cavity is formed in the protrusion 12, and a second piston 100 is arranged in the second cavity.

Further, a first cavity is arranged in the cylinder body, a first piston 200 is arranged in the first cavity, and the first piston 200 and the second piston 100 are connected in series.

Further, the cylinder body is provided with a cooling channel and a slideway 105, the axis of the slideway 105 is on the same straight line with the axis of the cylinder body, and the slideway 105 is communicated with the first cavity.

Further, the diameter of the first cavity is larger than that of the second cavity.

In some embodiments, the first piston 200 is provided with a reset rod 300 at one side and a piston rod 400 at the other side, and the second piston 100 is provided at one side of the reset rod 300. The upper end of the piston rod 400 is connected with the first piston 200, and the lower end of the piston rod penetrates through the bottom of the cylinder body, so that working components can be externally connected.

Further, the reset lever 300 is slidably connected to the slide 105, and the free end of the reset lever 300 is located outside the cylinder.

Further, the free end of the reset lever 300 is provided with a reset mechanism 3, and the reset mechanism 3 may be a spring, preferably, the spring may be a double spring.

Further, a limiting block 2 is further disposed at the free end of the reset lever 300, and the limiting block 2 is used for limiting the position of the reset mechanism 3.

In an embodiment of the disclosure, a thread section is disposed at a free end of the reset lever 300, a threaded hole is disposed on the limiting block 2, and the limiting block 2 is screwed with the thread section of the reset lever 300 through the threaded hole.

Further, the threaded section of the reset lever 300 is provided with a lock nut 1, and the lock nut 1 is used for locking and fixing the limiting block 2.

The limiting block 2 is provided with at least one working hole 7, so that the limiting block 2 is convenient to install and detach, and preferably, the number of the working holes 7 is six.

Further, the lower end of the limiting block 2 is provided with a protrusion 11 which is used for fixing the reset mechanism 3 in a combined action with a protrusion 12 at the upper end of the cylinder body.

In some embodiments, the cooling channel is located on the side of the cylinder where the slide 105 is located, away from the piston rod 400.

In another embodiment of the present disclosure, the inner wall of the slideway 105 is provided with a first sealing member 101 and a second sealing member 102. Preferably, the inner wall of the slideway 105 is also provided with a third seal 103, said third seal 103 being located between the first seal 101 and the second seal 102.

Further, a guiding sleeve 104 is further arranged on the inner wall of the slideway 105, and the guiding sleeve 104 is positioned between the first sealing element 101 and the second sealing element 102.

In another embodiment of the disclosure, the self-heat dissipation rapid oil cylinder body is further provided with a first oil inlet/outlet 6 and a second oil inlet/outlet 5, the first oil inlet/outlet 6 is communicated with the first cavity, and the second oil inlet/outlet 5 is communicated with the second cavity. The first oil inlet/outlet 6 is communicated with the first cavity and is positioned between the second sealing element 102 and the first piston 200, and the second oil inlet/outlet 5 is communicated with the second cavity and is positioned between the first sealing element 101 and the second piston 100. Working medium enters the first cavity through the first oil inlet/outlet 6 and enters the second cavity through the second oil inlet/outlet 5.

In yet another embodiment of the present disclosure, the cooling channel includes a liquid inlet channel 4 and a liquid outlet channel 8, and both the liquid inlet channel 4 and the liquid outlet channel 8 are in communication with the slideway 105. The communication position of the liquid inlet channel 4 and the slideway 105 is positioned at the position between the first sealing piece 101 and the second sealing piece 102, and the communication position of the liquid outlet channel 8 and the slideway 105 is positioned at the position between the first sealing piece 101 and the second sealing piece 102. The communicating position of the liquid inlet channel 4 and the liquid outlet channel 8 is positioned between the first sealing piece 101 and the second sealing piece 102.

The cooling medium enters the slideway 105 from the liquid inlet channel 4 and flows out from the liquid outlet channel 8. The cooling medium may be oil or water. The cooling channel plays a role in circulating cooling in the operation of the hydraulic cylinder, meanwhile, a cooling medium can flow into the slideway 105 from the liquid inlet channel 4, so that the effects of lubrication and friction reduction are achieved, and the temperature rise problem can be effectively relieved. In addition, since the liquid inlet channel 4 and the liquid outlet channel 8 are both communicated with the slide way 105, heat can be dissipated from the liquid inlet channel 4 and the liquid outlet channel 8, that is, the liquid inlet channel 4 and the liquid outlet channel 8 also play a role in heat dissipation and ventilation.

The self-cooling quick oil cylinder provided by the application has the advantages of reasonable design, compact volume, low energy consumption, simple structure, excellent stability and reliability, and can realize the effect of self-cooling of the cylinder body while realizing quick output, thereby meeting the requirements of actual production.

The foregoing has outlined rather broadly the more detailed description of the application in order that the detailed description of the application that follows may be better understood, and in order that the present application may be better understood. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the application can be made without departing from the principles of the application and these modifications and adaptations are intended to be within the scope of the application as defined in the following claims.

Claims

1. A self-cooling rapid hydraulic cylinder, characterized in that the self-cooling rapid hydraulic cylinder includes a cylinder body, wherein a first cavity is provided inside the cylinder body, and a first piston (200) is provided inside the first cavity; a second cavity is provided at the upper end of the cylinder body, and a second piston (100) is provided inside the second cavity, wherein the first piston (200) and the second piston (100) are connected in series.

The cylinder body is provided with a cooling channel and a slide (105), and the slide (105) is connected to the first cavity; a reset rod (300) is provided on one side of the first piston (200), the reset rod (300) is slidably connected to the slide (105), and the free end of the reset rod (300) is located outside the cylinder body, and a reset mechanism (3) is provided on the free end of the reset rod (300); the cooling channel includes a liquid inlet channel (4) and a liquid outlet channel (8), and both the liquid inlet channel (4) and the liquid outlet channel (8) are connected to the slide (105);

The free end of the reset rod (300) is provided with a limiting block (2), which is used to limit the reset mechanism (3); the reset mechanism (3) is a spring, and the lower end of the limiting block (2) is provided with a protrusion (11). One end of the spring is sleeved on the protrusion (11) at the lower end of the limiting block (2), and the other end is sleeved on the protrusion (12) at the upper end of the cylinder; the limiting block (2) is provided with at least one working hole (7) to facilitate the disassembly and installation of the limiting block (2); the limiting block (2) is provided with a threaded hole, and the free end of the reset rod (300) is provided with a threaded section. The limiting block (2) is screwed into the threaded section of the reset rod (300) through the threaded hole; the threaded section of the reset rod (300) is provided with a locking nut (1), which is used to lock the limiting block (2).

2. The self-cooling rapid oil cylinder according to claim 1, characterized in that a protrusion (12) is provided at the upper end of the cylinder body, and the second cavity is provided inside the protrusion (12) of the cylinder body.

3. A self-cooling rapid hydraulic cylinder according to claim 2, characterized in that a first sealing element (101) and a second sealing element (102) are provided on the inner wall of the slide (105), and the first sealing element (101) and the second sealing element (102) are used to prevent leakage of the working medium.

4. A self-cooling rapid oil cylinder according to claim 3, characterized in that the cylinder body is provided with a first oil inlet/outlet (6) and a second oil inlet/outlet (5);

The first oil inlet/outlet (6) is connected to the first cavity, and the connection between the first oil inlet/outlet (6) and the first cavity is located between the second seal (102) and the first piston (200);

The second oil inlet/outlet (5) is connected to the second cavity, and the connection between the second oil inlet/outlet (5) and the second cavity is located between the first seal (101) and the second piston (100).

5. A self-cooling rapid oil cylinder according to claim 3, characterized in that the connection between the liquid inlet channel (4) and the slide (105) is located between the first seal (101) and the second seal (102), and the connection between the liquid outlet channel (8) and the slide (105) is located between the first seal (101) and the second seal (102).

6. A self-heating rapid hydraulic cylinder according to claim 3, characterized in that a guide sleeve (104) is provided on the inner wall of the slide (105), and the guide sleeve (104) is located between the first seal (101) and the second seal (102).

7. A self-heating rapid oil cylinder according to claim 6, characterized in that the connection between the liquid inlet channel (4) and the liquid outlet channel (8) is located between the first seal (101) and the second seal (102).

8. A self-heating rapid oil cylinder according to claim 7, characterized in that a third sealing element (103) is further provided on the inner wall of the slide (105), and the third sealing element (103) is located between the first sealing element (101) and the second sealing element (102).

9. A self-cooling rapid hydraulic cylinder according to claim 2, characterized in that the axis of the slide (105) is on the same straight line as the axis of the cylinder body.