阅读说明：本技术 一种四功能旋转油缸分配器 (Four-function rotary oil cylinder distributor ) 是由 刘征 彭潇庆 李星男 孙冉 刘嵩 刘峰 于 2019-11-14 设计创作，主要内容包括：本发明公开一种四功能旋转油缸分配器,包括依次连接的油缸、稀油水旋转分配器、磁尺行程装置和甘油分配器；油缸内通过穿设有活塞的活塞杆分为有杆腔和无杆腔,无杆腔末端连接有稀油水旋转分配器,稀油水旋转分配器分为稀油段和水段,稀油段上开设有分别与有杆腔和无杆腔连通的第一通路和第二通路,水段上开设有进水通道,活塞杆内部中空且靠近活塞的一端开口,另一端封闭,进水通道通过活塞杆中空的内部连通有卷筒水道。本发明的四功能旋转油缸分配器,同时实现热轧卷筒的润滑供油功能、卷筒冷却降温功能、卷筒涨缩功能及卷筒涨径测量磁尺连接功能,解决了多通路多介质旋转油缸分配器不能完全选用机械密封型式的问题。(The invention discloses a four-function rotary oil cylinder distributor, which comprises an oil cylinder, a thin oil water rotary distributor, a magnetic scale stroke device and a glycerin distributor which are sequentially connected; divide into through the piston rod that wears to be equipped with the piston in the hydro-cylinder and have pole chamber and no pole chamber, no pole chamber end-to-end connection has thin oil water rotary distributor, thin oil water rotary distributor divide into thin oil section and water section, set up on the thin oil section respectively with first route and the second route that has pole chamber and no pole chamber to communicate, seted up inlet channel on the water section, the inside cavity of piston rod just is close to the one end opening of piston, the other end seals, inlet channel has the reel water course through the hollow inside intercommunication of piston rod. The four-function rotary oil cylinder distributor disclosed by the invention can simultaneously realize the lubricating oil supply function of a hot rolling drum, the cooling function of the drum, the expansion and contraction function of the drum and the expansion and contraction measuring magnetic scale connection function of the drum, and solves the problem that a multi-channel multi-medium rotary oil cylinder distributor cannot completely select a mechanical sealing type.)

1. The utility model provides a four function rotating cylinder distributor which characterized in that: comprises an oil cylinder, a thin oil-water rotary distributor, a magnetic scale stroke device and a glycerin distributor which are connected in sequence; the piston rod through wearing to be equipped with the piston in the hydro-cylinder divide into there is pole chamber and no pole chamber, no pole chamber end-to-end connection have thin oil water rotary distributor, thin oil water rotary distributor divide into thin oil section and water section, set up respectively on the thin oil section with have the first route and the second route of pole chamber and no pole chamber intercommunication, the passageway of intaking has been seted up on the water section, the inside cavity of piston rod just is close to the one end opening of piston, and the other end seals, the passageway of intaking passes through the hollow inside intercommunication of piston rod has the reel water course.

2. The four-function swivel cylinder dispenser of claim 1, further comprising: the oil cylinder comprises a cylinder body, the piston is arranged in the cylinder body, the piston is arranged on the piston rod in a penetrating mode, and one end of the piston rod is arranged on the cylinder body in a penetrating mode; the piston divides the cylinder body into a rod cavity and a rodless cavity; the hollow shaft of the thin oil-water rotary distributor is connected with one side of a rodless cavity of the rotary oil cylinder through a bolt, the first passage is communicated with a rod cavity of the oil cylinder, and the second passage is communicated with the rodless cavity of the oil cylinder; the tail end of the piston rod penetrates through the rodless cavity and then is sleeved in a hollow shaft of the thin oil water rotary distributor and is in sealing connection with the hollow shaft through two first sealing rings, and an automatic oil return valve is arranged on the thin oil section of the thin oil water rotary distributor; the tail end of the water section is connected with the magnetic scale stroke device, and the tail end of the magnetic scale stroke device is connected with the glycerin distributor.

3. The four-function swivel cylinder dispenser of claim 2, wherein: the thin oil water rotary distributor comprises a hollow shaft fixedly connected with the cylinder body, one end of the hollow shaft close to the cylinder body is connected with a thin oil shell through a bearing, the first passage and the second passage are arranged on the thin oil shell, and the automatic oil return valve is arranged on one side of the thin oil shell; a water shell is fixedly connected to one end, far away from the cylinder body, of the thin oil shell, a first movable ring and a second movable ring are fixedly sleeved on the part, located in the water shell, of the hollow shaft, and bearings are connected between the first movable ring and the second movable ring and the inner side of the water shell; a first static ring and a second static ring are arranged between the first movable ring and the second movable ring, the first static ring and the second static ring are respectively and fixedly connected with the inner wall of the water shell, one end of the first static ring is in friction seal contact with the first movable ring, and one end of the second static ring is in friction seal contact with the second movable ring; the two first sealing rings are positioned in the water shell; a second sealing ring is arranged between the first static ring and the water shell, a second sealing ring is arranged between the second static ring and the water shell, and a third sealing ring is fixedly arranged between the hollow shaft and the first movable ring and the second movable ring; the water shell is provided with the water inlet channel, the piston rod is provided with a central hole channel, one end of the piston rod, which is close to the cylinder body, is opened, the central hole channel is connected with a winding drum water channel through the opening end of the piston rod, the other end of the piston rod is closed, and the water inlet channel penetrates through the side wall of the piston rod and then is communicated with the central hole channel; the water inlet channel is located between the first stationary ring and the second stationary ring.

4. The four-function swivel cylinder dispenser of claim 3, wherein: the magnetic scale stroke device comprises a stroke sleeve, the front end face of the stroke sleeve is connected with the tail end of the hollow shaft through a screw, a hollow sleeve is arranged in the stroke sleeve and connected with the closed end of the piston rod through a screw, an empty sleeve baffle ring is sleeved on the outer wall of the hollow sleeve, a transmission slide block is arranged outside the empty sleeve baffle ring and positioned in a chute of the stroke sleeve, a magnetic scale bearing seat is connected with the outer sides of the transmission slide block and the empty sleeve baffle ring through screws, a magnetic scale seat disc is connected with the outer side of the magnetic scale bearing seat through a bearing, a magnetic scale ring assembly is arranged on the end face of one side of the magnetic scale seat disc, a rotation stopping screw rod is arranged on the end face of the other side of the magnetic scale seat disc, and one end of the rotation stopping screw rod is fixedly connected with the; a protective cover is arranged outside the stroke sleeve, one end of the protective cover is provided with a magnetic scale, and the other end of the protective cover is fixedly connected with the water shell; the glycerol distributor is connected to the tail end face of the stroke sleeve through a screw and sealed through a sealing ring, and the glycerol distributor is connected with a first glycerol passage hole and a second glycerol passage hole which are located on the stroke sleeve respectively.

5. The four-function swivel cylinder distributor of claim 4, wherein: the magnetic scale seat disc is provided with a rotation stopping hole, and the rotation stopping screw rod is inserted into the rotation stopping hole of the magnetic scale seat disc.

Technical Field

The invention relates to the technical field of rotary oil cylinder distributors, in particular to a four-function rotary oil cylinder distributor.

Background

The rotary oil cylinder distributor is a necessary device of a plate and strip coiler system, a hot rolling coiler is widely used in the rolling process of plate and strip steel, and a winding drum is main functional equipment of the coiler and mainly has two functions, namely, one function is to drive a steel coil to rotate; the other is a tension support of the steel coil. The expansion is realized by pushing and pulling a mandrel of a winding drum by a rotary oil cylinder to drive parts such as an inclined slide block, a connecting plate and the like to complete the expansion and contraction function of a sector plate; the rotation is usually achieved by a speed reducer to rotate the reel mandrel, which requires that a rotation cylinder mounted on the reel mandrel must rotate together with the reel. The rotary oil cylinder not only needs to push the mandrel of the winding drum to move, but also needs to convey glycerol and cooling water media to the winding drum so as to fully ensure the lubrication between the sliding surfaces of the winding drum and the water cooling of the fan-shaped plate and the mandrel of the winding drum, thereby prolonging the service life of the winding drum and improving the production efficiency of the winding drum. The common rotary oil cylinder distributor is a transition connection device for conveying various media sent by a hydraulic station, cooling water and a lubricating station to a rotary drum, the position of an oil cylinder piston rod is transmitted to a measuring system through a magnetic ruler to obtain the real-time size of the drum, the effective connection of an uncoiler body and an external hydraulic pipeline and circuit is realized, and the problem of medium or function transmission with one end fixed and one end rotating is solved.

The rotary oil cylinder distributor has the function of meeting the requirement of the function of a winding drum, and the conventional rotary oil cylinder distributor has the common function types of thin oil and glycerin; thin oil, glycerin, magnetic scale type; thin oil, water, magnetic ruler type.

From the above forms, it can be seen that the existing rotary oil cylinder distributor rarely uses a rotary oil cylinder distributor with the coexistence of four functions of thin oil, water, glycerin and a magnetic scale, and as for a hot-rolled wide-band winding drum, the size is larger, the requirement on cooling is not as strong as that on a lubricating system, so that the wide-band winding drum with the large size can be used without cooling basically, and as for a hot-rolled narrow-band winding drum, the size is smaller, particularly the size of a sector plate is thinner, in order to reduce the thermal stress phenomenon of the sector plate, the requirement on the cooling system is far higher than that on the automatic lubricating system, so that the hot-rolled narrow-band winding drum has no glycerin automatic lubricating system, and basically depends on manual oiling, the automation degree of equipment is low, the winding drum is frequently.

Disclosure of Invention

The invention aims to provide a four-function rotary oil cylinder distributor, which is used for solving the problems in the prior art, simultaneously realizing the lubricating oil supply function of a hot rolling drum, the cooling function of the drum, the expansion and contraction function of the drum and the expansion and contraction measuring magnetic scale connection function of the drum, and solving the problem that a multi-channel multi-medium rotary oil cylinder distributor cannot completely select a mechanical sealing type.

In order to achieve the purpose, the invention provides the following scheme:

the invention provides a four-function rotary oil cylinder distributor, which comprises an oil cylinder, a thin oil water rotary distributor, a magnetic scale stroke device and a glycerin distributor which are sequentially connected; the piston rod through wearing to be equipped with the piston in the hydro-cylinder divide into there is pole chamber and no pole chamber, no pole chamber end-to-end connection have thin oil water rotary distributor, thin oil water rotary distributor divide into thin oil section and water section, set up respectively on the thin oil section with have the first route and the second route of pole chamber and no pole chamber intercommunication, the passageway of intaking has been seted up on the water section, the inside cavity of piston rod just is close to the one end opening of piston, and the other end seals, the passageway of intaking passes through the hollow inside intercommunication of piston rod has the reel water course.

Optionally, the oil cylinder includes a cylinder body, the piston is arranged in the cylinder body, the piston is arranged on the piston rod in a penetrating manner, and one end of the piston rod is arranged on the cylinder body in a penetrating manner; the piston divides the cylinder body into a rod cavity and a rodless cavity; the hollow shaft of the thin oil-water rotary distributor is connected with one side of a rodless cavity of the rotary oil cylinder through a bolt, the first passage is communicated with a rod cavity of the oil cylinder, and the second passage is communicated with the rodless cavity of the oil cylinder; the tail end of the piston rod penetrates through the rodless cavity and then is sleeved in a hollow shaft of the thin oil water rotary distributor and is in sealing connection with the hollow shaft through two first sealing rings, and an automatic oil return valve is arranged on the thin oil section of the thin oil water rotary distributor; the tail end of the water section is connected with the magnetic scale stroke device, and the tail end of the magnetic scale stroke device is connected with the glycerin distributor.

Optionally, the thin oil water rotary distributor includes the hollow shaft fixedly connected to the cylinder block, one end of the hollow shaft close to the cylinder block is connected to a thin oil shell through a bearing, the first passage and the second passage are opened on the thin oil shell, and the automatic oil return valve is installed on one side of the thin oil shell; a water shell is fixedly connected to one end, far away from the cylinder body, of the thin oil shell, a first movable ring and a second movable ring are fixedly sleeved on the part, located in the water shell, of the hollow shaft, and bearings are connected between the first movable ring and the second movable ring and the inner side of the water shell; a first static ring and a second static ring are arranged between the first movable ring and the second movable ring, the first static ring and the second static ring are respectively and fixedly connected with the inner wall of the water shell, one end of the first static ring is in friction seal contact with the first movable ring, and one end of the second static ring is in friction seal contact with the second movable ring; the two first sealing rings are positioned in the water shell; a second sealing ring is arranged between the first static ring and the water shell, a second sealing ring is arranged between the second static ring and the water shell, and a third sealing ring is fixedly arranged between the hollow shaft and the first movable ring and the second movable ring; the water shell is provided with the water inlet channel, the piston rod is provided with a central hole channel, one end of the piston rod, which is close to the cylinder body, is opened, the central hole channel is connected with a winding drum water channel through the opening end of the piston rod, the other end of the piston rod is closed, and the water inlet channel penetrates through the side wall of the piston rod and then is communicated with the central hole channel; the water inlet channel is located between the first stationary ring and the second stationary ring.

Optionally, the magnetic scale stroke device comprises a stroke sleeve, the front end face of the stroke sleeve is connected with the tail end of the hollow shaft through a screw, a hollow sleeve is arranged in the stroke sleeve, the hollow sleeve is connected with the closed end of the piston rod through a screw, a hollow sleeve baffle ring is sleeved on the outer wall of the hollow sleeve, a transmission slider is arranged outside the hollow sleeve baffle ring and is located in a chute of the stroke sleeve, a magnetic scale bearing seat is connected with the outer sides of the transmission slider and the hollow sleeve baffle ring through screws, a magnetic scale seat disc is connected with the outer side of the magnetic scale bearing seat through a bearing, a magnetic ring assembly is arranged on the end face of one side of the magnetic scale seat disc, a rotation stopping screw rod is arranged on the end face of the other side of the magnetic scale seat disc, and one end of the rotation stopping screw rod is fixedly connected; a protective cover is arranged outside the stroke sleeve, one end of the protective cover is provided with a magnetic scale, and the other end of the protective cover is fixedly connected with the water shell; the glycerol distributor is connected to the tail end face of the stroke sleeve through a screw and sealed through a sealing ring, and the glycerol distributor is connected with a first glycerol passage hole and a second glycerol passage hole which are located on the stroke sleeve respectively.

Optionally, the magnetic scale base plate is provided with a rotation stopping hole, and the rotation stopping screw rod is inserted into the rotation stopping hole of the magnetic scale base plate.

Compared with the prior art, the invention has the following technical effects:

the rotary distributor with four functions is designed into mechanical seal for the first time, and compared with a rotary oil feeder with a rubber ring sealing structure or a rotary oil feeder adopting a full-clearance sealing mode, the rotary distributor is more reasonable.

The thin oil and the water medium are designed into an integral rotary joint, different sealing types are adopted in sections, the thin oil section adopts a standard mechanical clearance sealing type, the water section is designed into a mechanical friction contact sealing type, and the two sections share one hollow shaft, so that the volume of the rotary joint is more compact. The glycerol rotary oil feeder directly selects a standard two-way glycerol rotary oil feeder. The magnetic scale measuring function realizes real-time data of the position of the piston rod by means of a special magnetic scale stroke device, and a standard two-way glycerin rotating oil feeder can be selected by means of reasonable design of the magnetic scale stroke device.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.

FIG. 1 is a schematic view of a four-function rotary cylinder distributor according to the present invention;

FIG. 2 is a schematic view of a magnetic scale travel mechanism of the four-function rotary cylinder dispenser of the present invention;

wherein, 1 is an oil cylinder, 1-1 is a cylinder body, 1-2 is a piston, 1-3 is a piston rod, 2 is a thin oil water rotary distributor, 2-1 is a hollow shaft, 2-2 is a thin oil shell, 2-3 is a water shell, 2-4 is a first sealing ring, 2-5 is a first stationary ring, 2-6 is a second sealing ring, 2-7 is a first movable ring, 2-8 is a third sealing ring, 2-9 is a second stationary ring, 2-10 is an automatic oil return valve, 2-11 is a second movable ring, 4 is a glycerol distributor, 5 is a magnetic scale stroke device, 5-1 is a stroke sleeve, 5-2 is a protective cover, 5-3 is an empty sleeve baffle ring, 5-4 is a hollow sleeve, 5-5 is a transmission slide block, 5-6 is a magnetic scale bearing seat, 5-7 is a magnetic scale seat disc, 5-8 is a magnetic ring component, 5-9 is a magnetic ruler, 5-10 is a rotation stopping screw rod, P1 is a first passage, P2 is a second passage, P3 is a water inlet passage, R1 is a central hole passage, G1 is a first glycerin passage hole, and G2 is a second glycerin passage hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention aims to provide a four-function rotary oil cylinder distributor, which is used for solving the problems in the prior art, simultaneously realizing the lubricating oil supply function of a hot rolling drum, the cooling function of the drum, the expansion and contraction function of the drum and the expansion and contraction measuring magnetic scale connection function of the drum, and solving the problem that a multi-channel multi-medium rotary oil cylinder distributor cannot completely select a mechanical sealing type.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

The invention provides a four-function rotary oil cylinder distributor, as shown in figures 1 and 2, comprising an oil cylinder 1, a thin oil and water distributor 2, a magnetic scale stroke device 5 and a glycerin distributor 4, wherein the oil cylinder 1 comprises a cylinder body 1-1, a piston rod 1-3 and a piston 1-2, the oil cylinder 1 is divided into a rod cavity and a rodless cavity by the piston 1-2, the rodless cavity is used as a rotary oil cylinder to extend out of a shaft cavity, a hollow shaft 2-1 of the thin oil water rotary distributor 2 is connected with the tail of the rotary oil cylinder 1 through bolts, a first passage P1 and a second passage P2 of the thin oil water rotary distributor 2 are correspondingly connected with a rod cavity and the rodless cavity of the rotary oil cylinder one by one, a rod part at the right end of a piston rod 1-3 is sleeved into the hollow shaft 2-1 of the thin oil water rotary distributor 2 and is sealed through two groups of first sealing rings 2-4, and an automatic oil return valve 2-10 is arranged at a thin oil section of the thin oil water rotary distributor 2.

The thin oil water rotary distributor 2 comprises a hollow shaft 2-1, a thin oil shell 2-2, an automatic oil return valve 2-10, a water shell 2-3, a first sealing ring 2-4, a first stationary ring 2-5, a second sealing ring 2-6, a first movable ring 2-7, a third sealing ring 2-8, a second stationary ring 2-9, a second movable ring 2-11 and the like, wherein the left part of the hollow shaft 2-1 is a thin oil section, the right part of the hollow shaft is a water section, the thin oil shell 2-2 is arranged outside the thin oil section, the matching gap between the thin oil shell 2-2 and the hollow shaft 2-1 is kept constant through bearing support to realize gap sealing, the first movable ring 2-7 is arranged outside the hollow shaft 2-1 and rotates synchronously with the hollow shaft 2-1, and the first stationary ring 2-5 is sleeved rightwards and sequentially along the axial direction of the hollow shaft, 2-3 parts of a water shell, 2-9 parts of a second static ring and 2-11 parts of a second dynamic ring, wherein a bearing support is arranged between the outer diameter of the second dynamic ring 2-11 and the inner diameter of the water shell 2-3, 2-5 parts of a first static ring, the second static ring 2-9 and the water shell 2-3 are fixed, the first movable ring 2-7, the second movable ring 2-11 and the hollow shaft 2-1 rotate synchronously, a friction sealing pair is formed between the first static ring 2-5 and the first movable ring 2-7, a friction sealing pair is formed between the second static ring 2-9 and the second movable ring 2-11, two groups of static rings and the water shell 2-3 are sealed through the second sealing ring 2-6, the sealing pretightening force between the static rings and the movable rings is provided by a spring, two groups of movable rings and the hollow shaft 2-1 are sealed through the third sealing ring 2-8, and inlet water enters a water channel of the winding drum along a central hole channel R1 of the piston rod 1-2 after passing through a water inlet channel P3;

the magnetic scale stroke device 5 comprises a stroke sleeve 5-1, a protective cover 5-2, a hollow sleeve 5-4, an empty sleeve baffle ring 5-3, a transmission slide block 5-5, a magnetic scale bearing seat 5-6, a magnetic scale seat disc 5-7, a magnetic ring assembly 5-8, a magnetic scale 5-9, a rotation stopping screw rod 5-10 and the like, wherein the stroke sleeve 5-1 is connected with the hollow shaft 2-1 of the thin oil-water rotary distributor 2 through a screw, a first glycerin passage hole G1 and a second glycerin passage hole G2 are correspondingly connected and then penetrate through a cylinder body to be communicated with the outside, the hollow sleeve 5-4 is connected with an extending shaft of an oil cylinder piston rod 1-3 through a screw, the hollow sleeve 5-4 is sleeved with the empty sleeve baffle ring 5-3, the transmission slide block 5-5 is arranged outside the empty sleeve baffle ring 5-3 and is positioned in a sliding groove of the stroke sleeve 5-1, the magnetic scale bearing seat 5-6 is connected with the transmission slide block 5-5 and the hollow sleeve baffle ring 5-3 into a whole through screws, a bearing is arranged between the magnetic scale seat disk 5-7 and the magnetic scale bearing seat 5-6, the magnetic ring component 5-8 is arranged on the end surface of the magnetic scale seat disk 5-7, the rotation stopping screw rod 5-10 is arranged on the water shell 2-3 of the thin oil water rotary distributor 2, the magnetic scale seat disk 5-7 is provided with a rotation stopping hole, the rotation stopping screw rod 5-10 is inserted into the rotation stopping hole of the magnetic scale seat disk 5-7, when the piston rod 1-3 does reciprocating motion, the extending shaft thereof drives the hollow sleeve 5-4, the hollow sleeve baffle ring 5-3, the transmission slide block 5-5, the magnetic scale bearing seat 5-6 and the magnetic ring component 5-8 on the magnetic scale seat disk 5-7 to do synchronous reciprocating motion, when the rotary oil cylinder rotates and drives the hollow shaft 2-1 of the thin oil rotary distributor 2, the magnetic scale stroke sleeve 5-1 connected to the hollow shaft 2-1 rotates, the magnetic scale stroke sleeve 5-1 drives the transmission slide block 5-5 to rotate when rotating, and drives the magnetic scale bearing seat 5-6 to rotate through the transmission slide block 5-5, the magnetic scale seat disk 5-7 and the magnetic ring component 5-8 do not rotate under the action of the rotation stopping screw rod 5-10, the magnetic scale 5-9 is installed on the protective cover 5-2, and the protective cover 5-2 is connected with the water shell 2-3 of the thin oil water rotating distributor; the glycerin distributor 4 is of a standard two-way mechanical seal type, the specific structure is not described herein, and the glycerin distributor 4 is connected to the end face of the stroke sleeve 5-1 of the magnetic scale stroke device 5 through a screw and sealed through a seal ring.

The rotary distributor with four functions is designed into mechanical seal for the first time, and compared with a rotary oil feeder with a rubber ring sealing structure or a rotary oil feeder adopting a full-clearance sealing mode, the rotary distributor is more reasonable. The thin oil and the water medium are designed into an integral rotary joint, different sealing types are adopted in sections, the thin oil section adopts a standard mechanical clearance sealing type, the water section is designed into a mechanical friction contact sealing type, and the two sections share one hollow shaft, so that the volume of the rotary joint is more compact.

The glycerol rotary oil feeder directly selects a standard two-way glycerol rotary oil feeder. The magnetic scale measuring function realizes real-time data of the position of the piston rod by means of a special magnetic scale stroke device, a standard two-way glycerin rotary oil feeder can be selected by means of reasonable design of the magnetic scale stroke device, the sealing type of the medium under different rotating speed and pressure has the best recognized sealing type, a gap sealing type is adopted for a hydraulic high-speed rotary distributor with the pressure of more than 4MPa and less than 21MPa, and a small amount of sealing drainage oil naturally flows to an oil tank through a pressure oil return pipe with the pressure of less than 0.01 MPa. For the high-speed glycerin rotary oil feeder with the pressure of more than 6MPa and less than 21MPa, a non-leakage mechanical seal is usually adopted, if clearance seal is adopted for high-pressure glycerin, a large amount of seal oil drainage oil enters an oil return pipeline, and the glycerin cannot flow back to a recovery oil tank under the low pressure because of the paste, so the structure adopts a non-leakage mechanical friction contact seal type. The low-pressure cooling water basically adopts a mechanical sealing type or a rubber ring sealing type, the rubber ring sealing type is simple in structure and reliable in initial sealing, and the sealing lip abrasion resistance of the rubber ring is related to the rotating linear speed and lubrication, so that the high-speed non-lubrication continuous long-term operation working environment is not suitable, and the high-speed rotating water medium sealing is mostly designed into the mechanical sealing type.

The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.