CN110112866B - Small screw compressor motor - Google Patents

Abstract

The present invention discloses a small screw compressor motor, including a housing, a stator, a rotor and a rotating shaft, wherein the stator is arranged in the housing, the rotor is arranged in the stator, the rotating shaft is arranged on the rotor, and both ends of the housing are penetrated; the motor also includes a side cover, a one-way valve and a piston mechanism, a plurality of axially penetrating liquid passages are arranged in the circumferential direction of the side edge of the housing, and a liquid inlet ring and a liquid outlet ring connected to the liquid passages are arranged at both ends of the housing, the side cover is symmetrically arranged on both sides of the housing side wall, and a liquid storage cavity is formed with the housing, the liquid storage cavity is communicated with the liquid inlet ring and the liquid outlet ring through a first through hole and a second through hole respectively, the one-way valve is arranged in the first through hole and the second through hole, the piston mechanism is arranged in the housing, and is connected with the piston hole in a sliding and sealing manner, and the piston mechanism is driven to reciprocate in the piston hole by the rotating shaft. The present invention arranges symmetrical liquid storage cavities outside the housing, and ingeniously uses the piston mechanism to change the pressure in the two liquid storage cavities, thereby driving the flow of the coolant.

Description

A small screw compressor motor

Technical Field

The invention relates to the field of motors, and in particular to a small screw compressor motor.

Background technique

The motor will generate heat when in use. If the motor temperature is high, it will affect the operation of the motor and even cause damage to the motor in serious cases. Therefore, during the design, a heat dissipation device is often used to dissipate the heat of the motor. Ordinary motors usually use a cooling fan to dissipate heat to form air convection. Therefore, a heat dissipation port is set on the shell. However, in many cases, the motor is working outdoors. If it rains, rainwater is likely to enter the motor through the heat dissipation port and cause damage to the motor.

Summary of the invention

In view of the defects of the above prior art, the main purpose of the present invention is to overcome the shortcomings of the prior art, and discloses a small screw compressor motor, including a housing, a stator, a rotor and a rotating shaft, wherein the stator is arranged in the housing, the rotor is arranged in the stator, the rotating shaft is arranged on the rotor, and both ends thereof penetrate the housing; it also includes a side cover, a one-way valve and a piston mechanism, a plurality of axially penetrating liquid pipes are arranged circumferentially on the side edge of the housing, and a liquid inlet ring and a liquid outlet ring connected to the liquid pipes are arranged at both ends of the housing, and the side covers are symmetrically arranged on both sides of the side wall of the housing to form a A liquid storage chamber, the liquid storage chamber is connected with the liquid inlet ring and the liquid outlet ring through a first through hole and a second through hole respectively, the one-way valve is arranged in the first through hole and the second through hole, the coolant can only enter the liquid outlet ring from the liquid storage chamber through the one-way valve in the first through hole, and the coolant can only enter the liquid storage chamber from the liquid outlet ring through the one-way valve in the second through hole, a piston hole connected with the liquid storage chamber is arranged on the shell, the piston mechanism is arranged in the shell, and is slidably and sealedly connected with the piston hole, and the piston mechanism is driven to reciprocate in the piston hole by the rotating shaft.

Furthermore, the piston mechanism includes a body and a piston rod, the piston rod is arranged on the body, the two piston rods are respectively slidably and sealedly arranged in the piston hole, a push groove is recessed on the body, and a waist-shaped hole is arranged at the bottom of the push groove to allow the rotor shaft to pass through, and a push block is eccentrically arranged on the rotor shaft, and the push block is placed in the push groove.

Furthermore, a bearing is arranged on the pushing block, and the pushing block is in rolling contact with the pushing groove through the bearing.

Furthermore, the one-way valve includes a valve body, a spring and a sealing cover, the valve body includes a guide part and a connecting part, the sealing cover and the spring are arranged in the guide part, the sealing cover makes the connecting part normally closed through the spring, and a vent hole is arranged on the side wall of the guide part.

Furthermore, two side covers are provided, which are symmetrically arranged on both sides of the shell.

Furthermore, an oil filling hole connected to the liquid storage chamber is provided above the side cover, and the oil filling hole is sealed by a screw.

Furthermore, the shell comprises a shell body and end covers arranged on both sides of the shell body, and the end cover protrusions are provided as sealing rings for sealing the liquid outlet ring and the liquid inlet ring.

Furthermore, the side cover is provided with a plurality of heat sinks extending into the liquid storage cavity.

Beneficial effects achieved by the present invention:

The present invention arranges symmetrical liquid storage chambers outside the shell and cleverly uses the piston mechanism to change the pressure in the two liquid storage chambers to drive the flow of the coolant; through the eccentric wheel structure, the piston is driven to reciprocate with the help of the driving force of the rotating shaft, thereby saving costs; in addition, the liquid storage chambers are symmetrically arranged on both sides, and the pressures in the two liquid storage chambers are controlled by the piston rod at the same time, one liquid storage chamber discharges the coolant, and the other liquid storage chamber draws the coolant into the liquid storage chamber, thereby promoting the flow of the coolant; the heat sink is extended from the outside into the liquid storage chamber to increase the contact area with the coolant, thereby improving the heat dissipation effect.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a perspective view of a small screw compressor motor of the present invention;

FIG2 is a side view of a small screw compressor motor;

FIG3 is an exploded view of a small screw compressor motor;

Fig. 4 is a cross-sectional view taken along line B-B of Fig. 2;

FIG5 is a side view of the housing;

FIG6 is a front view of the housing;

Fig. 7 is a cross-sectional view taken along line A-A of Fig. 5;

Figure 8 is a schematic diagram of the internal structure of the motor;

FIG9 is a schematic structural diagram of a piston mechanism;

FIG10 is a schematic diagram of the connection between the body and the piston rod;

FIG11 is a schematic diagram of the structure of a one-way valve;

FIG12 is a schematic diagram of FIG11 from another viewing angle;

FIG13 is a front view of FIG11;

Fig. 14 is a cross-sectional view taken along line A-A of Fig. 13;

Figure 15 is a schematic diagram of the structure of the end cover;

FIG16 is a schematic diagram of the structure of the housing;

The reference numerals are as follows:

1. Shell, 2. Stator, 3. Rotor, 4. Rotating shaft, 5. Side cover, 6. Piston mechanism, 7. One-way valve, 11. Liquid passage, 12. Liquid inlet ring, 13. Liquid outlet ring, 14. Liquid storage chamber, 15. First through hole, 16. Second through hole, 17. Piston hole, 18. Shell body, 19. End cover, 20. Sealing ring, 41. Push block, 51. Oil filling hole, 52. Heat sink, 61. Body, 62. Piston rod, 611. Push groove, 612. Waist-shaped hole, 71. Valve body, 72. Sealing cover, 73. Spring, 711. Connecting part, 712. Guide part, 713. Vent hole.

Detailed ways

In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

A small screw compressor motor of the present invention, as shown in Figures 1-7, includes a housing 1, a stator 2, a rotor 3 and a rotating shaft 4, wherein the stator 2 is fixedly arranged in the housing 1, the rotor 3 is arranged in the stator 2, the rotating shaft 4 is arranged on the rotor 3 and penetrates the housing 1, and the rotating shaft 4 is driven to rotate by the rotor 3. It also includes a side cover 5, a piston mechanism 6 and a one-way valve 7, a plurality of axially penetrating liquid pipes 11 are circumferentially arranged on the side wall of the housing 1, and a liquid inlet ring 12 and a liquid outlet ring 13 connected to the liquid inlet ring 11 are arranged at both ends of the housing 1, and the coolant flows from the liquid inlet ring 12 through the liquid inlet ring 11 into the liquid outlet ring 13. Two side covers 5 are arranged, and are symmetrically arranged on the side walls of the housing 1 on both sides, and a liquid storage cavity 14 is formed by the side cover 5 and the housing 1 for storing coolant. In one embodiment, a first through hole 15 and a second through hole 16 are arranged on the side wall of the housing 1, wherein the first through hole 15 connects the liquid storage cavity 14 with the liquid inlet ring 12, and the second through hole 16 connects the liquid storage cavity 14 with the liquid outlet ring 13. The one-way valve 7 is arranged in the first through hole 15 and the second through hole 16; the first through hole 15 allows the coolant to enter the liquid inlet ring 12 only from the liquid storage chamber 14 through the one-way valve 7, and the second through hole 16 allows the coolant to enter the liquid storage chamber 14 only from the liquid outlet ring 13 through the one-way valve 7, so that the coolant forms a loop; that is, the coolant enters the liquid inlet ring 13 from the liquid storage chamber 14 through the first through hole 15, enters the liquid outlet ring 13 through the liquid pipe 11, and then returns to the liquid storage chamber 14 from the second through hole 16, and the motor is cooled by the flowing coolant. The housing 1 is also provided with a piston hole 17 connected to the liquid storage chamber 14, and the piston mechanism 6 is arranged in the housing 1 and connected to the rotating shaft 4. The piston mechanism 6 is driven to reciprocate in the piston hole 17 through the rotating shaft 4, thereby changing the pressure in the liquid storage chamber 11, and cooperating with the one-way valve 7 to realize the driving of the coolant.

In one embodiment, as shown in Fig. 4-10, the piston mechanism 6 includes a body 61 and a piston rod 62. Two piston rods 62 are provided. The two piston rods 62 are provided on the body 61, and the two piston rods 62 are respectively provided in the piston hole 17 in a sliding and sealing manner. A push groove 611 is provided on the body 61, and a waist-shaped hole 612 is provided at the bottom of the push groove 611 to penetrate and allow the rotating shaft 4 of the rotor 3 to pass through. A push block 41 is eccentrically provided on the rotating shaft 4 so that the push block 41 performs a circular motion. The rotating shaft 4 is placed in the waist-shaped hole 612, and the push block 41 is placed in the push groove 611. The circular motion of the push block 41 further pushes the body 61 to drive the piston rod 62 to reciprocate. At the same time, the cooperation between the waist-shaped hole 612 and the rotating shaft 4 guides the piston mechanism 6 to reciprocate. In a preferred embodiment, the piston holes 17 are symmetrically provided at both ends of the piston mechanism 6. Through the reciprocating motion of the piston mechanism 6, the pressure of the liquid storage chambers 14 on both sides is controlled at the same time. In order to facilitate the installation of the piston mechanism 6 in the housing 1, the body 61 is detachably connected to the piston rod 62. Specifically, fixing screw holes are installed on the body 61 and the piston rod 62, the piston rod 62 is installed in the piston hole, and then the piston rod 62 and the body 61 are connected by screws.

In the above embodiment, when the push block 41 makes a circular motion to push the piston mechanism 6 to move back and forth, there is sliding friction between the push block 41 and the side wall of the push groove 611. After long-term use, the wear is serious, which affects the service life. Preferably, a bearing (not shown) is also included, which is arranged on the push block 41, and then the piston mechanism 6 is pushed to reciprocate through the shaft; at this time, the push block 41 and the side wall of the push groove 611 are transformed into rolling friction, which greatly reduces the wear and tear, thereby increasing the service life.

The flow of the coolant is specifically described in combination with the above-mentioned embodiments; when the piston rod 62 moves toward the left liquid storage chamber 14, the pressure of the left liquid storage chamber 14 increases, and due to the action of the one-way valve 7, the second through hole is closed, and the coolant enters the liquid inlet ring 12 through the first through hole 15; at the same time, the pressure of the right liquid storage chamber 14 decreases, and the coolant is sucked from the liquid outlet ring 13 into the right liquid storage chamber 14, so that the pressure in the liquid tube 11 is constant. The coolant enters the liquid outlet ring 13 from the liquid inlet ring 12 through the liquid tube 11, realizing the flow of the coolant. Similarly, when the piston rod 62 moves toward the right liquid storage chamber 14, the pressure of the right liquid storage chamber 14 increases, and the coolant enters the liquid inlet ring 12 from the right liquid storage chamber 14 through the first through hole 15, and the pressure of the left liquid storage chamber 14 decreases, and the coolant in the liquid outlet ring 13 is sucked into the left liquid storage chamber 14.

In one embodiment, as shown in FIGS. 11-14 , the one-way valve 7 includes a valve body 71, a sealing cover 72 and a spring 73. The valve body 71 is provided with a connecting portion 711 and a guide portion 712. The sealing cover 72 and the spring 73 are arranged in the guide portion 712. The sealing cover 72 is supported and guided to reciprocate toward the connecting portion 711 by the guide portion 712, and the connecting portion 711 is kept in a normally closed state by the spring 73. In addition, a vent hole 713 is provided on the side wall of the guide portion 712. When the sealing cover 2 is opened, the gas is discharged from the vent hole 713 of the guide portion 712 through the connecting portion 711.

In one embodiment, as shown in Fig. 15, an oil filling hole 51 connected to the liquid storage chamber 14 is provided above the side cover 5, and the oil filling hole 51 is sealed by a screw. Whether the motor is in a horizontal state or a vertical state when in use, it is located above the side cover 5.

In one embodiment, as shown in FIG16 , the housing 1 includes a housing body 18 and end covers 19 disposed on both sides of the housing body, and the end covers 19 are protrudingly provided with sealing rings 20 for sealing the liquid outlet ring 12 and the liquid inlet ring 13. During installation, the end covers 19 are fixed to both ends of the housing body 18, and the sealing rings are embedded in the liquid outlet ring 12 and the liquid inlet ring 13. This structure facilitates the installation of the internal structure of the motor, and also facilitates the processing of the liquid pipe 11, the liquid inlet ring 12 and the liquid outlet ring 13.

In one embodiment, as shown in Figs. 1, 4 and 15, a plurality of heat sinks 52 extending into the liquid storage cavity are provided on the side cover 5. The contact area between the heat sink 52 and the coolant is increased, and the cooling oil is cooled by the heat sink 52 on the outside, thereby further improving the heat dissipation effect.

When the present invention is in use, as shown in FIG1-16, the coolant is injected into the liquid storage chamber 14 from the oil filling hole 51, so that the liquid storage chamber 14, the liquid pipe 11, the liquid inlet ring 12 and the liquid outlet ring 13 are filled with coolant. After the injection is completed, the oil filling hole 51 is sealed by a screw. The motor is running, and the push block 41 pushes the body 61 to move to the left, so that the piston rod 62 on the left side is inserted into the liquid storage chamber 14, and the pressure of the liquid storage chamber 14 increases. Due to the action of the one-way valve 7, the second through hole is closed, and the coolant enters the liquid inlet ring 12 through the first through hole 15; at the same time, the pressure of the liquid storage chamber 14 on the right side is reduced, and the coolant is sucked from the liquid outlet ring 13 into the liquid storage chamber 14 on the right side, so that the pressure in the liquid pipe 11 is constant. The coolant enters the liquid outlet ring 13 from the liquid inlet ring 12 through the liquid pipe 11, and the flow of the coolant is realized. Similarly, when the piston rod 62 moves toward the right liquid storage chamber 14, the pressure of the right liquid storage chamber 14 increases, and the coolant enters the liquid inlet ring 12 from the right liquid storage chamber 14 through the first through hole 15, and the pressure of the left liquid storage chamber 14 decreases, and the coolant in the liquid outlet ring 13 is sucked into the left liquid storage chamber 14, thereby realizing the circulation of the coolant.

The above are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. If the present invention is modified or replaced by equivalents without departing from the spirit and scope of the present invention, they should all be included in the protection scope of the claims of the present invention.

Claims (6)

1. The small screw compressor motor comprises a shell, a stator, a rotor and a rotating shaft, wherein the stator is arranged in the shell, the rotor is arranged in the stator, the rotating shaft is arranged on the rotor, and two ends of the rotating shaft penetrate through the shell; the device is characterized by further comprising a side cover, a one-way valve and a piston mechanism, wherein a plurality of liquid through pipes which axially penetrate are circumferentially arranged on the side edge of the shell, liquid inlet rings and liquid outlet rings which are connected with the liquid through pipes are arranged at the two ends of the shell, the side cover is symmetrically arranged on the two sides of the side wall of the shell and is communicated with the liquid inlet rings and the liquid outlet rings through a first through hole and a second through hole respectively, the one-way valve is arranged in the first through hole and the second through hole, cooling liquid can only enter the liquid outlet rings from the liquid inlet rings through the one-way valve in the first through hole, cooling liquid can only enter the liquid inlet rings from the liquid inlet rings through the one-way valve in the second through hole, piston holes communicated with the liquid inlet rings are formed in the shell, the piston mechanism is arranged in the shell and is in sliding sealing connection with the piston holes, and the piston mechanism is driven to reciprocate in the piston holes through the rotating shaft;

The piston mechanism comprises a body and a piston rod, the piston rod is arranged on the body, the two piston rods are respectively arranged in the piston holes in a sliding sealing mode, a pushing groove is concavely formed in the body, a through waist-shaped hole allowing a rotor rotating shaft to pass through is formed in the bottom of the pushing groove, a pushing block is eccentrically arranged on the rotating shaft of the rotor, and the pushing block is arranged in the pushing groove; and a plurality of radiating fins extending into the liquid storage cavity are arranged on the side cover.

2. The motor of claim 1, wherein the pushing block is provided with a bearing, and the pushing block is in rolling contact with the pushing groove through the bearing.

3. The small screw compressor motor as set forth in claim 1, wherein said check valve comprises a valve body, a spring and a seal cover, said valve body comprising a guide portion and a communication portion, said seal cover and said spring being disposed in said guide portion, said seal cover normally closing said communication portion by said spring, said guide portion side wall being provided with a vent.

4. The motor of claim 1, wherein two side covers are symmetrically disposed on both sides of the housing.

5. The motor of claim 1, wherein an oil hole is formed above the side cover and is connected to the liquid storage chamber, and the oil hole is sealed by a screw.

6. The motor of claim 1, wherein the housing comprises a housing body and end caps disposed on both sides of the housing body, and the end cap protrusions are provided with sealing rings for sealing the liquid outlet ring and the liquid inlet ring.