阅读说明：本技术 一种设置于湿式电机中的自触发式冷却支路 (Self-triggering type cooling branch arranged in wet motor ) 是由 柏宇星 李鑫 徐翊竣 花雅婷 丁清琳 黄楠 壮莹 马新宇 于 2021-06-28 设计创作，主要内容包括：本发明公开了一种设置于湿式电机中的自触发式冷却支路,电机内部被分隔成第一腔室和第二腔室,所述第二腔室中填充冷却液；自触发式冷却支路包括设置于第一腔室的冷却液传输管路,和设置于第二腔室中的自触发开关；冷却液传输管路的两端设有与第二腔室相通的单向阀A和单向阀B,单向阀A为进液阀,控制冷却液由第二腔室流向冷却液传输管路中；单向阀B为出液阀；自触发开关对应于单向阀A的阀口位置设置,用于根据冷却液的温度开启单向阀A,控制冷却液传输管路和第二腔室间冷却液的流动。本发明可以根据机械密封处的冷却液的温度自动触发冷却支路,在温度升高时,对机械密封进行进一步冷却,防止机械密封失效。(The invention discloses a self-triggering cooling branch arranged in a wet motor, wherein the interior of the motor is divided into a first cavity and a second cavity, and cooling liquid is filled in the second cavity; the self-triggering cooling branch comprises a cooling liquid transmission pipeline arranged in the first chamber and a self-triggering switch arranged in the second chamber; a check valve A and a check valve B which are communicated with the second chamber are arranged at the two ends of the cooling liquid transmission pipeline, the check valve A is a liquid inlet valve and controls the cooling liquid to flow from the second chamber to the cooling liquid transmission pipeline; the one-way valve B is a liquid outlet valve; the self-triggering switch is arranged corresponding to the valve port of the one-way valve A and used for opening the one-way valve A according to the temperature of the cooling liquid and controlling the flow of the cooling liquid between the cooling liquid transmission pipeline and the second cavity. The invention can automatically trigger the cooling branch according to the temperature of the cooling liquid at the mechanical seal, and further cool the mechanical seal when the temperature is increased, thereby preventing the mechanical seal from losing efficacy.)

1. The utility model provides a set up in wet motor from triggering formula cooling branch road which characterized in that:

the motor comprises a spindle, a motor outer wall and a motor inner wall which are coaxially arranged, a space gap defined by the motor outer wall and the motor inner wall forms a first cavity, and a space gap defined by the spindle and the motor inner wall forms a second cavity;

the self-triggering cooling branch comprises a cooling liquid transmission pipeline arranged in the first chamber and a self-triggering switch arranged in the second chamber; a check valve A and a check valve B which are communicated with the second chamber are arranged at two ends of the cooling liquid transmission pipeline, the check valve A is a liquid inlet valve and controls the cooling liquid to flow from the second chamber to the cooling liquid transmission pipeline; the one-way valve B is a liquid outlet valve; the self-triggering switch is arranged corresponding to the position of a valve port of the one-way valve A and used for opening the one-way valve A according to the temperature of the cooling liquid and controlling the flow of the cooling liquid between the cooling liquid transmission pipeline and the second chamber.

2. A self-triggered cooling branch provided in a wet electric machine according to claim 1, wherein: the self-triggering switch comprises a liquid storage cavity wall A, a liquid storage cavity wall B, a movable ring pressing block and blades fixedly connected with the liquid storage cavity wall A, wherein the liquid storage cavity wall A, the liquid storage cavity wall B and the movable ring pressing block are sequentially arranged along the axial direction of the main shaft;

the movable ring pressing block is arranged on the liquid storage cavity wall A, the movable ring pressing block is arranged on the movable ring pressing block, and the movable ring pressing block is arranged on the movable ring pressing block;

a sealed cavity surrounded by the liquid storage cavity wall A and the liquid storage cavity wall B forms a third cavity, and flowing liquid is filled in the third cavity;

liquid storage cavity wall B is equipped with the intercommunication check valve C of third cavity and fourth cavity, and liquid storage cavity wall A is equipped with the intercommunication check valve D of third cavity and fourth cavity, check valve C is out the liquid valve, check valve D is the feed liquor valve, still include in the third cavity with check valve C or the temperature switch that check valve D is connected.

3. A self-triggered cooling branch provided in a wet electric machine according to claim 2, wherein: the static ring A and the static ring B are fixedly connected with the wall A of the liquid storage cavity, the moving ring A and the moving ring B are respectively and fixedly connected with a moving ring pressing block, the other side of the static ring A is in contact with the other side of the moving ring A to form a sealing surface, and the other side of the static ring B is in contact with the other side of the moving ring B to form a sealing surface.

4. A self-triggered cooling branch provided in a wet electric machine according to claim 2, wherein: the temperature switch is a temperature sensing piece which controls the opening and closing of the one-way valve C.

5. A self-triggered cooling branch provided in a wet electric machine according to claim 2, wherein: the blades and the one-way valve A are arranged on the same radial surface.

6. The self-triggered cooling branch provided in a wet electric machine according to claim 5, wherein: the blade mounting structure comprises at least 3 blades arranged on the same radial surface, and the blades are mounted at equal angles.

7. A self-triggered cooling branch provided in a wet electric machine according to claim 2, wherein: the self-triggering switch is assembled on the shaft sleeve B and connected with the bearings A and the bearings B at two ends.

8. A self-triggered cooling branch provided in a wet electric machine according to claim 7, wherein: the liquid storage cavity wall A is matched and positioned with the bearing A, and the bottom end of the blade is matched and positioned with the bearing B.

9. A self-triggered cooling branch provided in a wet electric machine according to claim 7, wherein: also included is a mechanical seal disposed in the second chamber, the mechanical seal being fitted over the bushing C.

Technical Field

The invention belongs to the field of fluid mechanical pumps, and particularly relates to a self-triggering cooling branch arranged in a wet motor.

Background

The high-power high-speed submersible pump unit is matched with a wet motor to work, and a mechanical seal is used for separating a pump transmission medium from cooling liquid in a cavity of the wet motor. The mechanical seal area is easy to accumulate heat, so that the temperature at the mechanical seal is overhigh, the mechanical seal is invalid, and the unit cannot work normally.

Disclosure of Invention

The invention provides a self-triggering cooling branch arranged in a wet motor, aiming at the problems that the temperature of a mechanical seal is easy to be cooled and failed and the temperature is overhigh.

The technical purpose is achieved, the technical effect is achieved, and the invention is realized through the following technical scheme:

a self-triggering cooling branch arranged in a wet motor comprises a main shaft, a motor outer wall and a motor inner wall which are coaxially arranged, wherein a space gap defined by the motor outer wall and the motor inner wall forms a first cavity, a space gap defined by the main shaft and the motor inner wall forms a second cavity, and cooling liquid for cooling a mechanical seal and the motor cavity is filled in the second cavity;

the self-triggering cooling branch comprises a cooling liquid transmission pipeline arranged in the first chamber and a self-triggering switch arranged in the second chamber; a check valve A and a check valve B which are communicated with the second chamber are arranged at two ends of the cooling liquid transmission pipeline, the check valve A is a liquid inlet valve and controls the cooling liquid to flow from the second chamber to the cooling liquid transmission pipeline; the one-way valve B is a liquid outlet valve; the self-triggering switch is arranged corresponding to the position of a valve port of the one-way valve A and used for opening the one-way valve A according to the temperature of the cooling liquid and controlling the flow of the cooling liquid between the cooling liquid transmission pipeline and the second chamber.

As a further improvement of the invention, the self-triggering switch comprises a liquid storage cavity wall A, a liquid storage cavity wall B, a movable ring pressing block and blades fixedly connected with the liquid storage cavity wall A, wherein the liquid storage cavity wall A, the liquid storage cavity wall B and the movable ring pressing block are sequentially arranged along the axial direction of the main shaft;

the movable ring pressing block is arranged on the liquid storage cavity wall A, the movable ring pressing block is arranged on the movable ring pressing block, and the movable ring pressing block is arranged on the movable ring pressing block;

a sealed cavity surrounded by the liquid storage cavity wall A and the liquid storage cavity wall B forms a third cavity, and flowing liquid is filled in the third cavity;

the liquid storage cavity wall B is provided with a one-way valve C communicated with the third cavity and the fourth cavity, the liquid storage cavity wall A is provided with a one-way valve D communicated with the third cavity and the fourth cavity, the one-way valve C is a liquid outlet valve, the one-way valve D is a liquid inlet valve, and the third cavity further comprises a temperature switch connected with the one-way valve C or the one-way valve D.

As a further improvement of the invention, the static ring A and the static ring B are fixedly connected with the wall A of the liquid storage cavity, the movable ring A and the movable ring B are respectively and fixedly connected with the movable ring pressing block, the other side of the static ring A is contacted with the other side of the movable ring A to form a sealing surface, and the other side of the static ring B is contacted with the other side of the movable ring B to form a sealing surface.

As a further improvement of the invention, the temperature switch is a temperature sensing sheet which controls the opening and closing of the one-way valve C.

As a further improvement of the invention, the vanes are disposed in a co-radial plane with the check valve a.

As a further improvement of the invention, the device comprises at least 3 blades which are arranged on the same radial surface and are arranged at equal angles.

As a further improvement of the invention, the self-triggering switch further comprises a bearing A, a shaft sleeve B, a bearing B and a shaft sleeve C which are sleeved on the main shaft in sequence along the axial direction of the main shaft, wherein the self-triggering switch is assembled on the shaft sleeve B and connected with the bearing A and the bearing B at two ends.

As a further improvement of the invention, the liquid storage cavity wall A is connected with the bearing A in a matching way, and the bottom end of the blade is positioned with the bearing B in a matching way.

As a further development of the invention, it also comprises a mechanical seal arranged in the second chamber, said mechanical seal being fitted on said bushing C.

The invention has the beneficial effects that: the automatic triggering cooling branch in the wet motor can automatically trigger the cooling branch according to the temperature of the cooling liquid at the mechanical seal, and further cools the mechanical seal when the temperature is increased, so that the mechanical seal is prevented from failing. When the temperature of the motor cavity area where the mechanical seal is located does not reach the trigger temperature, the unit does not additionally consume energy to cool the area, the energy consumption is low, and the energy-saving and environment-friendly effects are achieved.

Drawings

FIG. 1 is a schematic view of the present invention in an installed position in a pump assembly;

FIG. 2 is a partial enlarged view of I;

FIG. 3 is a partial enlarged view of II;

wherein: 1-motor outer wall, 2-motor inner wall, 3-mechanical seal, 4-guide vane, 5-machine seal gland, 6-shaft sleeve A, 7-shaft sleeve B, 8-shaft sleeve C, 9-main shaft, 10-impeller, 11-coolant transmission pipeline, 12-check valve A, 13-check valve B, 14-bearing A, 15-stationary ring A, 16-moving ring A, 17-check valve C, 18-temperature sensing sheet, 19-liquid storage cavity wall A, 20-liquid storage cavity wall B, 21-check valve D, 22-stationary ring B, 23-moving ring B, 24-moving ring pressing block, 25-blade, 26-bearing B.

101-first chamber, 201-second chamber, 1101-cooling lumen, 1901-third chamber, 2301-fourth chamber.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following 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.

The following detailed description of the principles of the invention is provided in connection with the accompanying drawings.

The installation position of the auto-triggering cooling branch of the present invention as shown in fig. 1-3 is a first chamber 101 enclosed by the motor outer wall 1, the motor inner wall 2, the guide vane 4 and other components (the motor distal end, not shown in the figures) of the motor as a whole, and the first chamber 101 is filled with a conveying medium flowing from the pump inlet to the pump outlet; the motor inner wall 2, the mechanical seal cover 5, the main shaft 9 and other components of the machine set (a motor distal end, not shown in the figure) are enclosed into a second chamber 201, the second chamber is filled with cooling liquid for cooling the components located in the chamber, including the mechanical seal 3, and the mechanical seal 3 is arranged at a position close to the mechanical seal cover 5. The self-triggering cooling branch of the present invention comprises two parts, a coolant delivery line 11 disposed in the first chamber 101, and a self-triggering switch disposed in the second chamber 201.

For convenience of description later, the direction is defined as follows, and the axial direction of the main shaft 9 is right on the side close to the impeller 10 and left on the side close to the motor.

The cooling liquid transmission pipeline 11 is installed on the inner wall 2 of the motor through a fastener, the cooling liquid transmission pipeline 11 is entirely located in the first cavity 101, two ends (an inlet and an outlet) of the cooling liquid transmission pipeline 11 are in contact with the inner wall 2 of the motor, a check valve A12 and a check valve B13 are installed on the inner wall 2 of the motor corresponding to the inlet and the outlet of the cooling liquid transmission pipeline 11 through fasteners respectively, the flow direction of the check valve A12 is that the second cavity 201 flows into the cooling cavity 1101 in a one-way mode, and the flow direction of the check valve B13 is that the cooling cavity 1101 flows into the second cavity 201 in a one-way mode.

The main structure of the self-triggering switch comprises a liquid storage cavity wall A19, a liquid storage cavity wall B20, a movable ring pressing block 24 and a blade 25 fixedly connected with the liquid storage cavity wall A19, wherein the liquid storage cavity wall A19, the liquid storage cavity wall B20 and the movable ring pressing block 24 are sequentially arranged along the axial direction of a main shaft; the liquid storage cavity further comprises a static ring A15, a dynamic ring A16, a static ring B22 and a dynamic ring B23 which are arranged corresponding to the two ends of the dynamic ring pressing block 24 and the liquid storage cavity wall A19, wherein the static ring A15 is in sealing fit with the dynamic ring A16, and the static ring B22 is in sealing fit with the dynamic ring B23.

The liquid storage cavity wall A19 and the liquid storage cavity wall B20 are connected in a combined mode to form a closed cavity, namely a third cavity 1901, and the inside of the third cavity 1901 is filled with transmission fluid with high viscosity. The movable ring A16 and the movable ring B23 are mounted on the movable ring pressing block 24 by using fasteners, and the static ring A15 and the static ring B22 are mounted on the liquid storage cavity wall A19 by using fasteners respectively. The static ring A15 and the dynamic ring A16 are in matched sealing, the static ring B22 and the dynamic ring B23 are in matched sealing, and the static ring A15, the dynamic ring A16, the liquid storage cavity wall A19, the liquid storage cavity wall B20, the static ring B22, the dynamic ring B23 and the dynamic ring pressing block 24 jointly form a sealing area which is a fourth cavity 2301, namely a flowing working cavity.

The third chamber 1901 is provided with a temperature sensing reaction piece 18, a one-way valve C17 is installed on a liquid storage chamber wall B20, a one-way valve D21 is installed on a liquid storage chamber wall A19, the one-way valve C17 is located below a pressure piece of the temperature sensing reaction piece 18, the flow direction allowed by the one-way valve C17 is that the third chamber 1901 flows to the fourth chamber 2301 in a one-way mode, and the flow direction allowed by the one-way valve D21 is that the fourth chamber 2301 flows to the third chamber 1901 in a one-way mode.

The vanes 25 are connected to the liquid storage cavity wall A19 through fasteners, the outlet positions of the vanes 25 face the one-way valve A12, a plurality of vanes 25 can be provided, and a non-closed area is formed between each vane 25 and the moving ring pressing block 24. The movable ring pressing block 24 is arranged on the shaft sleeve B7 through a fastener and synchronously rotates along with the main shaft 9. Bearing a14 and bearing B26 are mounted on main shaft 9 with bearing a14 axially positioned between sleeve a6 and sleeve B7 and bearing B26 axially positioned between sleeve B7 and sleeve C8.

The rotating part is composed of the moving ring A16, the moving ring B23 and the moving ring pressing block 24, the static part is composed of the static ring A15, the liquid storage cavity wall A19, the liquid storage cavity wall B20, the static ring B22 and the blades 25, wherein the static ring A15 and the moving ring A16, and the static ring B22 and the moving ring B23 form a liquid seal sealing rotating part and a static part. The outer ring of the bearing A14 realizes the axial positioning of the static part and the rotating part through a liquid storage cavity wall A19.

The working principle is as follows: after assembly, the third chamber 1901 and the fourth chamber 2301 are two closed areas which are not in contact with each other, when the temperature of the transmission fluid in the third chamber 1901 does not reach the temperature change of the temperature sensing sheet 18, the temperature sensing sheet 18 tightly presses one end of the check valve C17, that is, the transmission fluid in the third chamber 1901 cannot flow into the fourth chamber 2301, the stationary part does not rotate, and no liquid flows in the cooling liquid transmission pipeline 11. When the temperature of the region near the third chamber 1901 rises to reach the deformation temperature of the temperature sensing response piece 18 (corresponding temperature sensing response piece 18 can be selected according to the allowable range of the temperature in the motor cavity, for example, a bimetallic strip can be used as the temperature sensing response piece 18), the temperature sensing response piece 18 presses one end of the check valve C17 to open, the transmission fluid flows from the third chamber 1901 to the fourth chamber 2301 through the check valve C17, and the transmission fluid flows back to the third chamber 1901 through the check valve D21 under the action of centrifugal force, so that circulation is formed. In this process, the torque of the rotating portion is transmitted to the stationary portion, and the stationary portion rotates. The vane 25 rotates with the rotor, creating a pressure in the area of the top of the vane 25 (i.e., the area where the check valve a12 is located) sufficient to open the check valve a12, completing the circulation of the coolant from the area of the second chamber 201-check valve a 12-cooling lumen 1101-check valve B13-second chamber 201.

When flowing in the cooling lumen 1101, on the one hand, the conveying medium flowing from the pump inlet to the pump outlet can exchange heat with the wall surface of the cooling liquid transmission pipeline 11, thereby cooling the cooling liquid in the cooling liquid transmission pipeline 11; on the other hand, the cooling liquid stirring device plays a role in stirring the cooling liquid, so that the heat of the cooling liquid in the second chamber 201 is rapidly diffused, the temperature is uniformly distributed, and the overhigh temperature near the mechanical seal 3 is avoided.

The installation step: the temperature sensing sheet 18 is arranged on the inner wall of the liquid storage cavity wall A19 by using a fastener; connecting the liquid storage cavity wall A19 and the liquid storage cavity wall B20 by using a fastener; the check valve C17 and the check valve D21 are mounted on the liquid storage cavity wall B20 and the liquid storage cavity wall A19 respectively through fasteners, when the temperature sensing response piece 18 is not deformed, one end of the check valve C17 is completely sealed, the liquid storage cavity wall A19 and the liquid storage cavity wall B20 are enclosed to form a third cavity 1901, and the third cavity 1901 is filled with transmission fluid with high viscosity. The static ring A15 and the static ring B22 are installed at the bottom and the top of the liquid storage cavity wall A19 through fasteners, and the plurality of blades 25 are installed at the right end of the liquid storage cavity wall A19 through fasteners. The stationary ring a15, the reservoir wall a19, the reservoir wall B20, and the stationary ring B22 form a stationary portion. The movable ring A16 and the movable ring B23 are respectively arranged at the bottom and the top of the movable ring pressing block 24 by using fasteners, and the movable ring A16, the movable ring B23 and the movable ring pressing block 24 form a rotating part; the movable ring A16 and the static ring A15 are matched to form a sealing end face, the static ring B22 and the movable ring B23 are matched to form a sealing end face, and the rotating part and the static part are integrally assembled in advance.

The shaft sleeve A6, the bearing A14, the shaft sleeve B7, the self-triggering switch, the bearing B26 and the shaft sleeve C8 are sequentially installed in the main shaft 9 and sequentially contact to form axial positioning, the rotating part and the shaft sleeve B7 are fastened through fasteners, and the rotating part and the main shaft 9 rotate synchronously.

All of the above components are located in the second chamber 201.

The cooling liquid transmission pipeline 11 is installed on the inner wall 2 of the motor by using a fastener, and the two ends of the cooling liquid transmission pipeline 11 are respectively connected with a check valve A12 and a check valve B13, wherein the check valve A12 is opposite to the top of the blade 25, and the check valve B13 is arranged at the upper area of the mechanical seal 3. The coolant transfer line 11 is located entirely within the first chamber 101.

To enhance the cooling effect, the self-triggering switch is disposed near the mechanical seal 3, and the check valve B13 is disposed near the right side, corresponding to the region directly above the mechanical seal 3.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.