阅读说明：本技术 高压转子泵机械密封结构 (Mechanical sealing structure of high-pressure rotor pump ) 是由 王姝 于 2020-11-30 设计创作，主要内容包括：本发明提供了高压转子泵机械密封结构,属于泵体密封技术领域,包括泵体、密封盖、转轴、第一密封圈、第二密封圈和压力液体。密封盖安装在泵体一侧；密封盖的内沿设有固定套。转轴穿设在泵体和固定套内,转轴上套装有定位套,定位套穿设在固定套的内侧。第一密封圈定位在定位套上,并抵靠在固定套上；第一密封圈用于与泵体输送的液体接触。第二密封圈定位在固定套上,并抵靠在定位套上,第二密封圈与第一密封圈间隔设置,第二密封圈、第一密封圈、固定套和定位套之间围设为充油腔。压力液体填充在充油腔内,压力液体用于平衡第一密封圈所受的液体的压力。本发明提供的高压转子泵机械密封结构装配较为简单,并且便于安装与装配。(The invention provides a mechanical sealing structure of a high-pressure rotor pump, which belongs to the technical field of pump body sealing and comprises a pump body, a sealing cover, a rotating shaft, a first sealing ring, a second sealing ring and pressure liquid. The sealing cover is arranged on one side of the pump body; the inner edge of the sealing cover is provided with a fixing sleeve. The rotating shaft is arranged in the pump body and the fixed sleeve in a penetrating mode, the rotating shaft is sleeved with the positioning sleeve, and the positioning sleeve is arranged on the inner side of the fixed sleeve in a penetrating mode. The first sealing ring is positioned on the positioning sleeve and is abutted against the fixing sleeve; the first sealing ring is used for being in contact with liquid conveyed by the pump body. The second sealing ring is positioned on the fixing sleeve and is abutted against the positioning sleeve, the second sealing ring and the first sealing ring are arranged at intervals, and an oil filling cavity is defined among the second sealing ring, the first sealing ring, the fixing sleeve and the positioning sleeve. The pressure liquid is filled in the oil filling cavity and used for balancing the pressure of the liquid borne by the first sealing ring. The mechanical sealing structure of the high-pressure rotor pump provided by the invention is simple to assemble and convenient to install and assemble.)

1. High pressure impeller pump mechanical seal structure, its characterized in that includes:

a pump body;

the sealing cover is arranged on one side of the pump body; the inner edge of the sealing cover is provided with a fixing sleeve;

the rotating shaft penetrates through the pump body and the fixed sleeve, a positioning sleeve is sleeved on the rotating shaft, and the positioning sleeve penetrates through the inner side of the fixed sleeve;

the first sealing ring is positioned on the positioning sleeve and abuts against the fixing sleeve; the first sealing ring is used for being in contact with liquid conveyed by the pump body;

the second sealing ring is positioned on the fixing sleeve and is abutted against the positioning sleeve, the second sealing ring and the first sealing ring are arranged at intervals, and an oil filling cavity is defined among the second sealing ring, the first sealing ring, the fixing sleeve and the positioning sleeve;

and the pressure liquid is filled in the oil filling cavity and used for balancing the pressure of the liquid borne by the first sealing ring.

2. The mechanical seal structure of claim 1, wherein a first plug is disposed at an end of the positioning sleeve close to the driving end of the rotating shaft, a second plug is disposed at an end of the fixing sleeve far from the first plug, and the first seal ring and the second seal ring are respectively attached to opposite sides of the first plug and the second plug.

3. The mechanical seal structure of claim 2, wherein said first plug is integrally formed with said positioning sleeve, and said second plug is integrally formed with said fixing sleeve.

4. The mechanical seal structure of high-pressure rotor pump according to claim 1, wherein said first seal ring is clamped on the outer side surface of said positioning sleeve, and said second seal ring is clamped on the inner side surface of said fixing sleeve.

5. A mechanical seal structure of a high pressure rotor pump according to claim 1, wherein the seal cover is provided with a liquid conveying pipe communicated with the oil filling cavity.

6. The high pressure gerotor pump mechanical seal of claim 1, wherein an elastomeric member is disposed between the first seal ring and the second seal ring.

7. The mechanical seal structure of high-pressure rotor pump according to claim 1, wherein the inner side surface of the fixing sleeve is provided with a limiting sleeve, and two side edges of the limiting sleeve respectively abut against the opposite side surfaces of the first sealing ring and the second sealing ring.

8. The mechanical seal structure of the high-pressure rotor pump according to claim 1, wherein a pressure rod is slidably disposed on the seal cover, the pressure rod extends into the oil-filled cavity, a positioning column is fixed on the seal cover, a locking sleeve is threadedly connected to the positioning column, and the locking sleeve is disposed on one side of the pressure rod and used for limiting the pressure rod.

9. The mechanical seal structure of a high-pressure rotor pump according to claim 8, wherein the seal cover is provided with a through hole in sliding fit with the pressure rod, the inner side surface of the seal cover is provided with a blocking pad, the blocking pad covers the through hole, and the outer side surface of the blocking pad abuts against one end of the pressure rod away from the lock sleeve.

Technical Field

The invention belongs to the technical field of pump body sealing, and particularly relates to a mechanical sealing structure of a high-pressure rotor pump.

Background

At present, the existing mechanical seal of the rotor pump has more leakage points and large leakage amount due to the complex structure and other reasons, and leakage materials easily enter the bearing end of a gear box. Because the liquid of carrying flows in the back by the feed inlet, move the high-pressure area by the low-pressure area of pump body inner chamber under the effect of two rotors in the pump body, flow out from the discharge gate again, because the liquid pressure is higher in the high-pressure area, make the liquid of high-pressure area can flow in the gear box bearing end from the clearance of pump body shaft hole wall, thereby have great extrusion force to the sealing washer that plays the sealing effect, for this reason current can install more seal structure in order to reach the sealed effect of rotor when high-speed rotation usually, but this just leads to the structure comparatively complicated, be not convenient for assemble.

Disclosure of Invention

The invention aims to provide a mechanical sealing structure of a high-pressure rotor pump, and aims to solve the problems of complex structure and inconvenience in assembly.

In order to achieve the purpose, the invention adopts the technical scheme that: provided is a mechanical seal structure of a high-pressure rotor pump, comprising:

a pump body;

the sealing cover is arranged on one side of the pump body; the inner edge of the sealing cover is provided with a fixing sleeve;

the rotating shaft penetrates through the pump body and the fixed sleeve, a positioning sleeve is sleeved on the rotating shaft, and the positioning sleeve penetrates through the inner side of the fixed sleeve;

the first sealing ring is positioned on the positioning sleeve and abuts against the fixing sleeve; the first sealing ring is used for being in contact with liquid conveyed by the pump body;

the second sealing ring is positioned on the fixing sleeve and is abutted against the positioning sleeve, the second sealing ring and the first sealing ring are arranged at intervals, and an oil filling cavity is defined among the second sealing ring, the first sealing ring, the fixing sleeve and the positioning sleeve;

and the pressure liquid is filled in the oil filling cavity and used for balancing the pressure of the liquid borne by the first sealing ring.

As another embodiment of this application, the position sleeve is close to the one end of pivot drive end is equipped with first end cap, fixed cover is kept away from the tip of first end cap is equipped with the second end cap, first sealing washer with the second sealing washer is laminated respectively first end cap with on the relative side of second end cap.

As another embodiment of the present application, the first plug and the positioning sleeve are integrally formed, and the second plug and the fixing sleeve are integrally formed.

As another embodiment of this application, first sealing washer joint is in on the lateral surface of position sleeve, the second sealing washer joint is in the medial surface of fixed cover.

As another embodiment of the application, the sealing cover is provided with a transfusion tube communicated with the oil filling cavity.

As another embodiment of the present application, an elastic member is disposed between the first seal ring and the second seal ring.

As another embodiment of this application, the medial surface of fixed cover is provided with the stop collar, the both sides limit of stop collar supports respectively and leans on first sealing washer with on the relative side of second sealing washer.

As another embodiment of this application, it is provided with the pressure bar to slide on the sealing cover, the pressure bar extend to the oil charge intracavity, be fixed with the reference column on the sealing cover, threaded connection has the lock sleeve on the reference column, the lock sleeve is located one side of pressure bar is used for spacingly the pressure bar.

As another embodiment of this application, sealed covering seted up with pressurization pole sliding fit's through-hole, the medial surface of sealed lid is provided with the shutoff pad, the shutoff pad cover is established on the through-hole, and the lateral surface of shutoff pad supports and leans on the pressurization pole is kept away from the one end of lock sleeve.

The mechanical sealing structure of the high-pressure rotor pump provided by the invention has the beneficial effects that: compared with the prior art, the mechanical sealing structure of the high-pressure rotor pump is characterized in that the sealing cover is arranged on one side of the pump body, the fixing sleeve is arranged on the inner edge of the sealing cover, the rotating shaft penetrates through the pump body and the fixing sleeve, and the positioning sleeve is sleeved on the rotating shaft. The first sealing ring is positioned on the positioning sleeve and is abutted against the fixing sleeve. The second sealing sleeve is positioned on the fixing sleeve and is abutted against the positioning sleeve. Because first sealing washer and second sealing washer interval set up, consequently first sealing washer, second sealing washer, fixed cover and position sleeve enclose to establish into the oil-filled chamber. The oil-filled cavity is filled with pressure liquid.

In practical application, because first sealing washer supports and leans on the fixed cover, the second sealing washer supports and leans on the position sleeve to make the oil-filled chamber become an inclosed cavity, because the liquid contact that first sealed pad and pump body were carried, after rushing into pressure liquid, through exerting certain pressure in advance on first sealing washer, make first sealing washer can partly balance outside liquid pressure, and then guaranteed the leakproofness between fixed cover and the position sleeve, the assembly is comparatively simple, and be convenient for installation and assembly.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions 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 creative efforts.

Fig. 1 is a schematic structural diagram of a mechanical seal structure of a high-pressure rotary pump according to a first embodiment of the present invention;

fig. 2 is a schematic connection diagram of the elastic member, the first sealing ring and the second sealing ring according to the second embodiment of the present invention;

fig. 3 is a schematic connection diagram of a stop collar, a first seal ring and a second seal ring according to a third embodiment of the present invention;

fig. 4 is a schematic connection diagram of the locking sleeve, the pressure rod and the fixing sleeve according to the fourth embodiment of the present invention.

In the figure: 1. a pump body; 2. a sealing cover; 3. fixing a sleeve; 4. a positioning sleeve; 5. a first plug; 6. a second plug; 7. a first seal ring; 8. a second seal ring; 9. a pressure liquid; 10. an elastic member; 11. a limiting sleeve; 12. a locking sleeve; 13. a positioning column; 14. a pressurizing rod; 15. a plugging pad; 16. a rotating shaft.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1 and 4 together, the mechanical sealing structure of the high-pressure rotor pump according to the present invention will now be described. The mechanical sealing structure of the high-pressure rotor pump comprises a pump body 1, a sealing cover 2, a rotating shaft 16, a first sealing ring 7, a second sealing ring 8 and pressure liquid 9. The sealing cover 2 is arranged on one side of the pump body 1; the inner edge of the sealing cover 2 is provided with a fixed sleeve 3. The rotating shaft 16 penetrates through the pump body 1 and the fixed sleeve 3, the positioning sleeve 4 is sleeved on the rotating shaft 16, and the positioning sleeve 4 penetrates through the inner side of the fixed sleeve 3. The first sealing ring 7 is positioned on the positioning sleeve 4 and is abutted against the fixed sleeve 3; the first sealing ring 7 is intended to come into contact with the liquid delivered by the pump body 1. The second sealing ring 8 is positioned on the fixed sleeve 3 and is abutted against the positioning sleeve 4, the second sealing ring 8 and the first sealing ring 7 are arranged at intervals, and an oil filling cavity is defined between the second sealing ring 8, the first sealing ring 7, the fixed sleeve 3 and the positioning sleeve 4. The pressure liquid 9 is filled in the oil filling cavity, and the pressure liquid 9 is used for balancing the pressure of the liquid on the first sealing ring 7.

The mechanical sealing structure of the high-pressure rotor pump provided by the invention has the beneficial effects that: compared with the prior art, the mechanical sealing structure of the high-pressure rotor pump has the advantages that the sealing cover 2 is arranged on one side of the pump body 1, the fixing sleeve 3 is arranged on the inner edge of the sealing cover 2, the rotating shaft 16 penetrates through the pump body 1 and the fixing sleeve 3, and the positioning sleeve 4 is sleeved on the rotating shaft 16. The first seal ring 7 is positioned on the positioning sleeve 4 and abuts against the fixed sleeve 3. The second gland is positioned on the fixed sleeve 3 and rests against the positioning sleeve 4. Because first sealing washer 7 and second sealing washer 8 interval setting, consequently first sealing washer 7, second sealing washer 8, fixed cover 3 and position sleeve 4 enclose to establish as the oil charge chamber. The oil-filled cavity is filled with a pressure liquid 9.

In practical application, because first sealing washer 7 supports and leans on fixed cover 3, second sealing washer 8 supports and leans on position sleeve 4 to make the oil-filled chamber become an inclosed cavity, because the liquid contact that first sealed pad and pump body 1 carried, after pouring into pressure liquid 9, through exerting certain pressure in advance on first sealing washer 7, make first sealing washer 7 can partly balance outside liquid pressure, and then guaranteed the leakproofness between fixed cover 3 and the position sleeve 4, the assembly is comparatively simple, and be convenient for installation and assembly.

An avoiding cavity is formed in the inner side face of the pump body 1, a rotor is sleeved on the rotating shaft 16, and the rotor rotates in the avoiding cavity. During the liquid conveying process, the two rotors rotate in a matching mode, so that the liquid is pressurized under the action of the two rotors. Meanwhile, the positioning sleeve 4 is sleeved on the rotating shaft 16, the positioning sleeve 4 and the fixed sleeve 3 are arranged at intervals, one side surface of the first sealing ring 7 is contacted with the pressure liquid 9, and the other side surface of the first sealing ring is contacted with the liquid conveyed by the avoiding cavity. Because both sides of the first sealing ring 7 are contacted with liquid under pressure, the bearing capacity is improved.

The pump body 1 is provided with a feeding hole and a discharging hole, a low-pressure area can be formed on one side, close to the feeding hole, of an avoiding cavity inside the pump body 1, and a high-pressure area can be formed on one side, close to the discharging hole. In order to be able to keep the first sealing ring 7 and the second sealing ring 8 as stable as possible, the pressure of the pressure fluid 9 injected into the oil-filled chamber can be equal to the pressure of the fluid in the low-pressure region, so that the fluid in the low-pressure region keeps the first sealing ring 7 in a relatively balanced state. When the liquid in the high-pressure area acts on the first sealing ring 7, because the pressure liquid 9 is already present in the first sealing ring 7, compared with other structures which are not filled with liquid, the acting force borne by the first sealing ring 7 is reduced, and therefore the stability of the first sealing ring 7 is ensured.

In order to avoid the pressure fluid 9 from overflowing from the gap of the first seal ring 7 and affecting the fluid delivered by the pump body 1, the pressure fluid 9 can be the same as the fluid delivered by the pump body 1, and therefore, even if leakage occurs, no significant effect is produced. Simultaneously carry out dual sealed by first sealing washer 7 and second sealing washer 8 in this application, even consequently the leakproofness of first sealing washer 7 became invalid, second sealing washer 8 also can play certain sealed effect.

As a specific embodiment of the mechanical sealing structure of the high-pressure rotor pump provided by the present invention, please refer to fig. 2 to 4, wherein a first plug 5 is disposed at one end of the positioning sleeve 4 close to the driving end of the rotating shaft 16, a second plug 6 is disposed at an end of the fixing sleeve 3 far from the first plug 5, and a first sealing ring 7 and a second sealing ring 8 are respectively attached to opposite side surfaces of the first plug 5 and the second plug 6. Because the pressure liquid 9 needs to be filled between the first sealing ring 7 and the second sealing ring 8, under the action of the pressure liquid 9, the first sealing ring 7 and the second sealing ring 8 have the tendency of moving towards the directions away from each other, so as to avoid the slippage of the first sealing ring 7 and the second sealing ring 8, therefore, a first plug 5 and a second plug 6 are respectively arranged on the positioning sleeve 4 and the fixed sleeve 3, and by arranging the first plug 5 and the second plug 6 and respectively abutting a first sealing ring 7 and a second sealing ring 8 on the opposite sides thereof, the movement of the first sealing ring 7 and the second sealing ring 8 is limited, when the force of the larger external liquid is applied, the force applied to the first sealing ring 7 acts on the second sealing ring 8 through the pressure liquid 9, and the second sealing ring 8 is abutted against the side surface of the second plug 6, so that the acting force which can be borne by the first sealing ring 7 is improved.

Referring to fig. 2 to 4 together, as a specific embodiment of the mechanical seal structure of the high-pressure rotor pump provided by the present invention, the first plug 5 is integrally formed with the positioning sleeve 4, and the second plug 6 is integrally formed with the fixing sleeve 3. In order to improve the connection strength and the structural stability, the first plug 5 is integrally formed with the positioning sleeve 4, and the second plug 6 is integrally formed with the fixing sleeve 3. Meanwhile, in order to ensure the connection strength between the positioning sleeve 4 and the rotating shaft 16, the positioning sleeve 4 can be regarded as a shoulder on the rotating shaft 16, the positioning sleeve 4 can also be directly welded on the rotating shaft 16, the positioning sleeve 4 can be directly connected on the rotating shaft 16 through a positioning pin for the convenience of installation, and at the moment, the airtightness between the positioning sleeve 4 and the rotating shaft 16 needs to be ensured.

As a specific embodiment of the mechanical sealing structure of the high-pressure rotor pump provided by the present invention, please refer to fig. 2 to 4, the first sealing ring 7 is clamped on the outer side surface of the positioning sleeve 4, and the second sealing ring 8 is clamped on the inner side surface of the fixing sleeve 3. In order to make first sealing washer 7 and second sealing washer 8 all can keep relative position's stability, because the pivot 16 is higher for the rotational speed of the pump body 1 with sealed lid 2, simultaneously in order to avoid all fixing first sealing washer 7 and second sealing washer 8 and produce inefficacy when pivot 16 or fixed cover 3 simultaneously, consequently first sealing washer 7 and second sealing washer 8 separately fix a position, consequently there is second sealing washer 8 at the medial surface joint of fixed cover 3, also offer the second ring channel that is used for joint second sealing washer 8 at the medial surface of fixed cover 3, second sealing washer 8 can directly bond in first ring channel. And a first annular groove for clamping the first sealing ring 7 is also formed in the outer side surface of the positioning sleeve 4.

During actual installation, the first sealing ring 7 is clamped in the first annular groove, the second sealing ring 8 is clamped in the second annular groove, the sealing cover 2 penetrates from one side of the rotating shaft 16, an oil filling cavity is finally formed through the insertion fit of the positioning sleeve 4 and the fixing sleeve 3, and then the pressure liquid 9 is injected.

As a specific implementation mode of the mechanical sealing structure of the high-pressure rotor pump provided by the invention, a transfusion pipe communicated with the oil filling cavity is arranged on the sealing cover 2. In order to avoid that the leakage of the pressure fluid 9 has an effect on the purity of the fluid delivered by the pump body 1, the pressure fluid 9 may be the same as the fluid delivered by the pump body 1. In order to keep enough pressure liquid 9 in the oil filling cavity and ensure that the pressure liquid 9 can be supplemented in time even if leakage occurs, the infusion tube is communicated with the oil filling cavity and is externally connected with pressure equipment, and when the rotating speed of the rotating shaft 16 is different, the liquid with different pressures can be input through the infusion tube, so that the tightness is ensured.

Referring to fig. 2, an elastic member 10 is disposed between the first seal ring 7 and the second seal ring 8 as a specific embodiment of the mechanical seal structure of the high-pressure rotary pump according to the present invention. The action force borne by the first sealing ring 7 finally acts on the second sealing ring 8 through the pressure liquid 9, and the side surface, far away from the first sealing ring 7, of the second sealing ring 8 abuts against the second plug 6, so that the movement of the second sealing ring 8 is limited through the second stopper. In order to reduce the pressure of the pressure liquid 9 injected into the oil filling cavity, an elastic part 10 is arranged between the first sealing ring 7 and the second sealing ring 8, the elastic part 10 can be a wave spring, and the elastic part 10 can be matched with the pressure liquid 9 to extrude the first sealing ring 7, so that the stability of the structure of the first sealing ring 7 is improved.

As a specific embodiment of the mechanical sealing structure of the high-pressure rotor pump provided by the present invention, please refer to fig. 3, a limiting sleeve 11 is disposed on an inner side surface of the fixed sleeve 3, and two side edges of the limiting sleeve 11 respectively abut against opposite side surfaces of the first sealing ring 7 and the second sealing ring 8. Since the side of the second sealing ring 8 facing away from the first sealing ring 7 rests against the second plug 6, the movement of the second sealing ring 8 is limited by the second stop. In order to reduce the pressure of the pressure liquid 9 injected into the oil filling cavity, a limiting sleeve 11 is arranged on the inner side surface of the fixing sleeve 3, the limiting sleeve 11 is directly abutted against the opposite side surfaces of the first sealing ring 7 and the second sealing ring 8, finally, the first sealing ring 7 is limited between the first plug 5 and the limiting sleeve 11, the second sealing ring 8 is clamped between the second plug 6 and the limiting sleeve 11, and the bearing capacity is improved by limiting the movement of the sealing rings.

As a specific embodiment of the mechanical sealing structure of the high-pressure rotor pump provided by the present invention, please refer to fig. 4, a pressure rod 14 is slidably disposed on the sealing cover 2, the pressure rod 14 extends into the oil-filled cavity, a positioning column 13 is fixed on the sealing cover 2, a locking sleeve 12 is threadedly connected to the positioning column 13, and the locking sleeve 12 is disposed on one side of the pressure rod 14 and used for limiting the pressure rod 14. The pressure of the pressure liquid 9 can be conveniently adjusted through the pressurizing rod 14, and the length of the pressurizing rod 14 extending into the oil filling cavity is different by rotating the locking sleeve 12.

As a specific embodiment of the mechanical sealing structure of the high-pressure rotor pump provided by the present invention, please refer to fig. 4, a through hole slidably engaged with the pressure rod 14 is formed in the sealing cover 2, a blocking pad 15 is disposed on an inner side surface of the sealing cover 2, the blocking pad 15 covers the through hole, and an outer side surface of the blocking pad 15 abuts against one end of the pressure rod 14 away from the locking sleeve 12. The pressurizing rod 14 penetrates through the fixing sleeve 3, in order to avoid leakage of pressure liquid 9 in the oil-filled cavity caused by the fact that the pressurizing rod 14 penetrates through the fixing sleeve 3, firstly, a through hole in sliding fit with the pressurizing rod 14 is formed in the sealing cover 2, the plugging pad 15 is arranged on the inner side face of the sealing cover 2, the pressurizing rod 14 is driven to move through the locking sleeve 12, the plugging pad 15 is pushed by the movement of the pressurizing rod 14, and finally, the pressure in the oil-filled cavity is changed.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.