CN217327906U - Self-heat-dissipation hydraulic oil cylinder - Google Patents

Abstract

The utility model discloses a from cold hydraulic cylinder of heat dissipation liquid should include the cylinder body from cold hydraulic cylinder of heat dissipation liquid, the inside cavity that is equipped with of cylinder body, is provided with the piston in the cavity, and piston one side is equipped with the release link, and the opposite side is equipped with the piston rod. Be provided with cooling channel and slide on the cylinder body, slide and cavity intercommunication, the slide inner wall is equipped with first sealing member, second sealing member and uide bushing, the uide bushing is located between first sealing member and the second sealing member. 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 slide way. The free end of the reset rod is provided with a reset mechanism and a limiting block, and the limiting block is used for limiting the reset mechanism. The cylinder body is also provided with an oil inlet/outlet which is communicated with the cavity and is positioned between the second sealing element and the piston. This from heat dissipation liquid cooling hydraulic cylinder can effectual solution because the temperature rise problem that piston reciprocating motion arouses in the cavity.

Description

Self-heat-dissipation hydraulic oil cylinder

Technical Field

The disclosure relates to a hydraulic cylinder, in particular to a self-radiating hydraulic cooling hydraulic cylinder.

Background

Mechanized production is a basic starting point of industrial process, which means that manual labor is replaced by machinery to complete production operation, and mechanization is an important way for improving labor productivity and reducing physical labor. Nowadays, in the highly mechanized modern society, people daily production and life, more and more work is completed by mechanical equipment, the machinery can complete the work efficiently, and therefore our life is more convenient.

In mechanized production, mechanical equipment can efficiently complete work due to the fact that the mechanical equipment is used as a force transmission core by the aid of a hydraulic oil cylinder of the core component of the mechanical equipment. The hydraulic oil cylinder is an energy conversion device for converting input hydraulic energy into mechanical energy, has simple structure, moves stably when doing reciprocating motion, and is widely applied to various engineering machines, ships, machine tools and even national defense equipment. Generally speaking, the hydraulic oil cylinder consists of a cylinder barrel, a cylinder cover, a piston rod, a buffer device, a sealing device and an exhaust device. The hydraulic oil cylinder has the characteristics of small volume, capability of bearing larger pressure, working temperature range of-60-200 ℃, impact resistance and the like, has various structural forms, is mainly divided into a piston cylinder, a plunger cylinder and a swinging cylinder according to the structural forms, and adopts the working principle that oil is used as a working medium, the motion is transmitted through the change of a sealed volume, and the power is transmitted through the pressure in the oil.

However, hydraulic rams tend to be at too high a temperature during operation for several reasons, such as: (1) along with the increase of the hydraulic driving power, the effective speed and the pressure of a piston in the hydraulic oil cylinder are obviously increased, so that the temperature in the cylinder is easy to generate a larger temperature gradient, and the piston has obvious problems of thermal fatigue and thermal damage and reciprocates; (2) poor-quality hydraulic oil is easy to oxidize and is easy to cavitate and separate out bubbles during working, so that the working performance of the system is reduced, and the local temperature is increased; (3) the selection of the hydraulic oil grade is improper, the viscosity coefficient is higher, the oil friction is increased, the on-way pressure loss and the local pressure loss are increased, heat is generated, and the oil temperature is overhigh; the viscosity coefficient is low, so that the internal leakage of the element is increased and is converted into heat energy, and the temperature of the hydraulic oil is increased; (4) when the hydraulic oil cylinder continuously works in hot summer, the heat productivity of a hydraulic system is far larger than the heat dissipation capacity due to overhigh environment temperature and poor heat dissipation effect, and the heat is remained in the system, so that the temperature in the hydraulic oil cylinder is overhigh; (5) engineering machine tool operational environment is comparatively abominable, and after hydraulic system long-time construction operation, the pollutant in the external environment and impurity such as the sediment that fluid itself appeared lead to the pollution of hydraulic oil easily, and the friction that these impurity can aggravate the hydraulic cylinder cavity arouses the temperature rise.

The viscosity of hydraulic oil can directly be influenced to hydraulic oil cylinder high temperature, and hydraulic oil has the warm viscous characteristic, and hydraulic oil viscosity reduces after the temperature risees, causes the system easily to leak, and then reduces work efficiency and still can cause the pollution to the environment. When the temperature of the oil is too high, air dissolved in the oil escapes, cavitation occurs, the oil is deteriorated, the lubricating performance is reduced, the working performance of a hydraulic system is reduced, even the sealing ring of the oil cylinder is failed due to the too high oil temperature, the sealing function is lost, oil leakage in the oil cylinder is caused, and serious consequences are caused. When the temperature of the hydraulic oil cylinder rises, the temperature of a hydraulic element is influenced to rise, the hydraulic element can be deformed, the original matching is damaged, the original assembly clearance of parts is reduced, and when relative movement occurs, the friction resistance among the elements is increased, so that the temperature rise in the system is further aggravated. In addition, the oxidation of fluid can be accelerated to a certain extent to hydraulic system high temperature, makes the fluid emulsification rotten, forms colloidal particles, and the hole in the hydraulic system part can be blocked to these particulate matters, will finally lead to the unable normal work of system.

In order to solve the above problems, one solution of the prior art is to increase the volume of the hydraulic cylinder and inject more hydraulic oil into the hydraulic cylinder to enhance the heat dissipation effect. Although this measure alleviates the problem of temperature rise in hydraulic rams to some extent, doing so results in increased oil costs. In addition, the volume of the hydraulic oil cylinder is increased, which is equivalent to the volume of the whole system, and has a certain limitation on some mechanical equipment needing to work in a narrow space.

In conclusion, the stability of the system is seriously affected by the overhigh temperature of the hydraulic oil cylinder, the production efficiency is reduced, and the normal work of the system is severely affected. Therefore, it is necessary to take practical measures to cool down the hydraulic cylinder.

SUMMERY OF THE UTILITY MODEL

To the too high problem of temperature rise in the use of hydraulic cylinder, this disclosure provides a from heat dissipation liquid cooling hydraulic cylinder. This hydraulic cylinder is rational in infrastructure, and is small, with low costs, and work efficiency is high, and the cooling device of self plays circulative cooling's effect, can use at narrow and small space range, need not further to enlarge the hydraulic system space and on the extravagant basis of oil, can the effectual temperature rise problem of solving the hydraulic cylinder use.

One of the concepts of the present disclosure is to provide a self-dissipating, hydro-cooled hydraulic cylinder that includes a cooling gallery to cyclically cool itself during operation of the hydraulic cylinder.

The other concept of the disclosure lies in that the free end of the reset rod of the self-radiating liquid-cooling hydraulic oil cylinder is provided with a double spring, and the elasticity of the hydraulic oil cylinder is enhanced by the structure of the double spring, so that the working efficiency of the hydraulic oil cylinder is improved.

Another concept of the present disclosure is that the cooling medium in the cooling channel of the self-cooling liquid-cooled hydraulic oil cylinder can flow into the slideway on the cylinder body, and simultaneously plays a role in cooling and lubricating, thereby further alleviating the problem of temperature rise caused by the reciprocating motion of the piston in the working process of the hydraulic oil cylinder.

The self-radiating hydraulic oil cylinder comprises a cylinder body.

A cavity is arranged in the cylinder body, and a piston is arranged in the cavity.

The cavity adopts a rolling processing technology, a cold hardening layer is formed on the rolling surface through rolling forming, and the elastic and plastic deformation of grinding and contact surfaces is reduced, so that the wear resistance of the inner wall of the cavity is improved, and the inner elements of the cavity cannot be damaged even if the cavity is subjected to long-time motion friction. Meanwhile, by adopting a rolling processing technology, surface residual stress is left on the surface layer of the cavity, which is beneficial to sealing surface micro cracks and hindering further expansion of the erosion action, thereby improving the corrosion resistance of the surface of the cavity.

The cylinder body on still be equipped with the slide, slide and cavity intercommunication.

In some embodiments, the piston divides the chamber into two parts, and a reset rod is arranged on one side of the piston and a piston rod is arranged on the other side of the piston. The free end of the reset rod is positioned at the outer side of the cylinder body, and the free end of the reset rod is provided with a reset mechanism.

In some embodiments, the return mechanism is a spring.

In some embodiments, the return mechanism is a rubber band.

The free end of the reset rod is also provided with a limiting block. The limiting block is used for limiting the position of the reset mechanism, and at least one working hole is formed in the limiting block, so that the limiting block can be conveniently detached and installed.

The upper end of the piston rod is connected with the piston, and the lower end of the piston rod penetrates through the bottom of the cylinder body.

The cylinder body is provided with an oil inlet/outlet, and the oil inlet/outlet is close to the reset rod and far away from the piston rod. The hydraulic oil as working medium enters the cavity from the oil inlet/outlet port and flows out from the hole under the action of the piston, and the power is transmitted by the pressure in the hydraulic oil to work.

The free end of the reset rod is provided with a threaded section, and the threaded section of the reset rod is provided with a locking nut for locking and fixing the limiting block.

The thread section of the reset rod is screwed with the limiting block through the threaded hole.

Furthermore, the reset rod is connected to the slide in a sliding manner.

The cylinder body on be provided with cooling channel, cooling channel include inlet channel and liquid outlet channel, and inlet channel and liquid outlet channel all communicate with the slide. The cooling medium enters the slideway from the liquid inlet channel and flows out from the liquid outlet channel. The cooling medium is liquid, and the liquid is water or oil.

The self-radiating hydraulic oil cylinder also comprises a sealing device, and the performance of the sealing device is one of key factors for ensuring the normal work of a hydraulic system.

The sealing device is divided into static sealing and dynamic sealing, wherein the static sealing refers to the sealing without relative movement between sealing elements, and the dynamic sealing refers to the sealing between relative moving parts in equipment. The static seal is generally used at the cylinder cover part of the hydraulic cylinder, and the dynamic seal is used for a piston, a reset rod and a piston rod of the hydraulic cylinder which do reciprocating motion.

Further, the sealing device comprises a first sealing element and a second sealing element. The first sealing element is used for preventing dust in air from entering the cavity, and the second sealing element is used for preventing leakage of working medium

Furthermore, the communication positions of the liquid inlet channel and the liquid outlet channel with the slide way are positioned between the first sealing element and the second sealing element.

Furthermore, the position where the oil inlet/outlet port is communicated with the cavity is positioned between the second sealing element and the piston.

In some embodiments, the sealing device further comprises a third seal, the third seal being positioned between the first seal and the second seal.

In some embodiments, even if the second and third seals are damaged, no leakage of the working medium is caused, which flows out of the outlet passage.

The slide inner wall on be provided with the uide bushing, the uide bushing be located between first sealing member and the second sealing member. The uide bushing be polyphenylene sulfide uide bushing or graphite reinforcing uide bushing, play slide bearing's effect, prevent the direct friction of release link and cavity.

Compared with the existing products, the advantages of the present disclosure are:

(1) the self-radiating liquid-cooling hydraulic oil cylinder has the advantages of delicate appearance, reasonable structure, small volume and capability of being used in a narrow space range;

(2) the self-radiating hydraulic oil cylinder is simple and convenient to operate, free of hydraulic oil waste, low in cost and high in working efficiency;

(3) the self-radiating liquid-cooling hydraulic oil cylinder can effectively solve the problem of temperature rise of the hydraulic oil cylinder in the using process;

(4) this from heat dissipation liquid cooling hydraulic cylinder, under the condition that the sealing member damaged, working medium can follow the drain passage and flow out, can not cause working medium's leakage.

Drawings

The present disclosure will be described in further detail below with reference to the drawings and preferred embodiments, but those skilled in the art will appreciate that the drawings are only drawn for the purpose of illustrating the preferred embodiments and therefore should not be taken as limiting the scope of the present disclosure. Furthermore, unless specifically stated otherwise, the drawings are merely schematic representations based on conceptual representations of elements or structures depicted and may contain exaggerated displays and are not necessarily drawn to scale.

FIG. 1 is one of the schematic perspective views of a self-dissipating, hydraulic cylinder of the present disclosure;

FIG. 2 is a second perspective view of the self-dissipating hydraulic cylinder of the present disclosure;

FIG. 3 is a schematic cross-sectional view of a self-dissipating, hydraulic cylinder of the present disclosure;

fig. 4 is a partial enlarged view of the disclosure at fig. 3A.

Description of reference numerals:

1. a nut; 2. a limiting block; 3. a double spring; 4. a reset lever; 5. an oil inlet/outlet; 6. a liquid outlet channel; 7. a liquid inlet channel; 8. a piston rod; 9. a piston; 10. a working hole; 11. the limiting block is protruded; 12. the cylinder body is convex; 13. a slideway; 14. a guide sleeve; 101. a first seal member; 102. a third seal member; 103. second seal

Detailed Description

In order to make the technical solutions of the present disclosure better understood by those skilled in the art, the present disclosure will be described in detail, clearly and completely in the following with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the disclosure and are not intended to limit the disclosure.

An embodiment of the present disclosure discloses a self-radiating hydraulic oil cylinder, which is shown in fig. 1, 2, 3 and 4.

The self-radiating hydraulic oil cylinder comprises a cylinder body.

The cylinder body inside be provided with the cavity, be provided with piston 9 in the cavity, the piston divide into two parts with the cavity, piston one side be equipped with release link 4, the opposite side is equipped with piston rod 8.

The cylinder body on still be equipped with slide 13, slide 13 and cavity intercommunication.

The inner wall of the slideway 13 is provided with a first sealing element 101 and a second sealing element 103.

The cylinder body is provided with an oil inlet/outlet port 5 which is close to the reset rod 4 and far away from the piston rod 8.

The free end of the reset rod 4 is provided with a reset mechanism and a limiting block 2, and the limiting block 2 is used for limiting the reset mechanism.

The free end of the reset rod 4 is also provided with a thread section, and the thread section of the reset rod 4 is provided with a locking nut 1 for locking and fixing the limiting block 2.

In some embodiments, at least one working hole 10 is formed in the limiting block 2, so that the limiting block 2 can be conveniently detached and installed, a threaded hole is formed in the limiting block 2, and the limiting block 2 is screwed with the threaded section of the reset rod 4 through the threaded hole.

Preferably, the working hole 10 has six holes.

In one embodiment of the present disclosure, the reset mechanism is a spring, the spring is a double spring 3, the double spring 3 includes a big spring and a small spring, and the outer ring of the small spring is sleeved with the big spring.

In another embodiment of the present disclosure, the lower end of the limiting block 2 is provided with a limiting block protrusion 11, and the upper end of the cylinder body is provided with a cylinder body protrusion 12. The upper end of the double spring 3 is sleeved at the lower end limiting block bulge 11 of the limiting block 2, and the lower end of the double spring is sleeved at the cylinder body bulge 12 on the upper portion of the cylinder body, so that the double spring 3 is better fixed at the position between the limiting block 2 and the cylinder body. When hydraulic oil enters the hydraulic oil cylinder from the oil inlet/outlet 5, the hydraulic oil pushes the piston 9 to overcome the resistance of the double springs 3 to move downwards to drive the reset rod 4 to move downwards, the double springs 3 are compressed, after the hydraulic oil cylinder releases the oil pressure, the double springs 3 drive the reset rod 4 to move upwards, the piston 9 resets, and the hydraulic oil flows out from the oil inlet/outlet. The structure of the double springs 3 effectively improves the working efficiency of the hydraulic oil cylinder, and the backward movement speed of the piston 9 is more than 500 times/min.

In another embodiment of the present disclosure, a third sealing element 102 is further disposed on the inner wall of the sliding channel 13, and the third sealing element 102 is located between the first sealing element 101 and the second sealing element 103.

In another embodiment of the present disclosure, a guiding sleeve 14 is disposed on an inner wall of the sliding way, and the guiding sleeve 14 is located between the first sealing element 101 and the third sealing element 102.

The guide sleeve 14 is a graphite reinforced guide sleeve. The graphite reinforced guide sleeve takes high-force brass as a substrate, and a mode of embedding a solid lubricant in the substrate is taken as a lubricating medium, so that the graphite reinforced guide sleeve can be used in an oil-deficient or oil-free environment for a long time.

The solid lubricant is graphite, the graphite is a crystalline form of carbon, has a hexagonal lattice, atoms are arranged in a layered mode, and acting force between layers is small, so that relative sliding is easy to occur between the layers. Based on the structural characteristics, the lubricating oil has lower strength and hardness, but has good antifriction effect, and is a good solid lubricant. Even in a high-temperature and high-pressure environment, the graphite can play a good lubricating role. Therefore, the guide sleeve 14 can effectively reduce the friction between the cavity and the reset lever.

In another embodiment of the disclosure, the cylinder body is provided with a cooling channel, the cooling channel comprises a liquid inlet channel 7 and a liquid outlet channel 6, and the liquid inlet channel 7 and the liquid outlet channel 6 are both communicated with the slideway 13. The liquid inlet channel 7 and the liquid outlet channel 6 are positioned on the same horizontal plane, and the communication part of the liquid inlet channel and the liquid outlet channel with the slideway 13 is positioned between the third sealing pieces 102 of the guide sleeve 14.

The liquid inlet channel 7 is used for flowing in of cooling media, the liquid outlet channel 6 is used for flowing out of the cooling media, and the cooling media are water or oil.

In some embodiments, a refrigerator is connected to the outlet of the liquid outlet channel 6, and the cooling medium flowing out of the liquid outlet channel 6 is cooled by the refrigerator and then enters the slide 13 through the liquid inlet channel 7. The cooling medium entering the slideway 13 from the liquid inlet channel 7 is ensured to be in a low-temperature state, and a better cooling effect is achieved. On the one hand, cooling channel can play circulative cooling's effect in hydraulic cylinder use, and on the other hand, coolant can flow into slide 13 by inlet channel 7 and play the effect of lubrication, reduction friction, can effectually alleviate because the temperature rise problem that the reciprocating motion of release link 4 arouses in the cavity.

Claims (13)

1. The self-radiating hydraulic cylinder is characterized by comprising a cylinder body, wherein a cooling channel is arranged on the cylinder body;

a cavity is arranged in the cylinder body, a piston (9) is arranged in the cavity, a slide way (13) is also arranged on the cylinder body, and the slide way (13) is communicated with the cavity; the axis of the slideway (13) and the axis of the cylinder body are on the same straight line; piston (9) one side be equipped with release link (4), release link (4) sliding connection is on slide (13), and the free end of release link (4) is located the outside of cylinder body, is equipped with canceling release mechanical system on the free end of release link (4).

2. The self-radiating hydraulic oil cylinder as claimed in claim 1, wherein a limiting block (2) is arranged at a free end of the reset rod (4), and the limiting block (2) is used for limiting the reset mechanism.

3. The self-radiating hydraulic oil cylinder as claimed in claim 2, wherein the limiting block (2) is provided with at least one working hole (10) for facilitating detachment and installation of the limiting block (2).

4. The self-radiating hydraulic oil cylinder as claimed in claim 2, wherein the limiting block (2) is provided with a threaded hole, the free end of the reset rod (4) is provided with a threaded section, and the limiting block (2) is screwed with the threaded section of the reset rod (4) through the threaded hole.

5. The self-radiating hydraulic oil cylinder as claimed in claim 4, wherein the thread section of the reset rod (4) is provided with a locking nut (1), and the locking nut (1) is used for locking the limiting block (2).

6. The self-radiating hydraulic oil cylinder as claimed in claim 1, wherein the cooling channel comprises a liquid inlet channel (7) and a liquid outlet channel (6), and the liquid inlet channel (7) and the liquid outlet channel (6) are both communicated with the slideway (13).

7. A self-dissipating hydraulic cylinder as claimed in claim 1, wherein the inner wall of the slide (13) is provided with a first sealing member (101) and a second sealing member (103), the first sealing member (101) and the second sealing member (103) being adapted to prevent leakage of the working medium.

8. A self-radiating hydraulic cylinder as claimed in claim 7, characterized in that the inner wall of said slide (13) is provided with a guide sleeve (14), said guide sleeve (14) being located between said first seal (101) and said second seal (103).

9. A self-radiating hydraulic cylinder according to claim 7, characterised in that the connection between the inlet channel (7) and the slide (13) is at a position between the first seal (101) and the second seal (103), and the connection between the outlet channel (6) and the slide (13) is at a position between the first seal (101) and the second seal (103).

10. A self-dissipating hydraulic cylinder as claimed in claim 9, wherein the connection between the inlet passage (7) and the outlet passage (6) is between the guide sleeve (14) and the second seal (103).

11. A self-radiating hydraulic oil cylinder according to claim 7, characterized in that a third sealing member (102) is further arranged on the inner wall of the slideway (13), and the third sealing member (102) is positioned between the first sealing member (101) and the second sealing member (103).

12. The self-radiating hydraulic oil cylinder as claimed in claim 7, wherein the cylinder body is provided with an oil inlet/outlet (5), the oil inlet/outlet (5) is communicated with the cavity, and the communication position of the oil inlet/outlet (5) and the cavity is located between the second sealing member (103) and the piston (9).

13. The self-radiating hydraulic oil cylinder as claimed in claim 2, wherein the reset mechanism is a double spring (3), the lower end of the limiting block (2) is provided with a limiting block protrusion (11), the upper end of the cylinder body is provided with a cylinder body protrusion (12), one end of the double spring (3) is sleeved with the limiting block protrusion (11) at the lower end of the limiting block (2), and the other end of the double spring (3) is sleeved with the cylinder body protrusion (12) at the upper end of the cylinder body.

Images