Sealing mechanism of piston type compressor

Abstract

The utility model discloses a sealing mechanism of a piston type compressor, which relates to the technical field of piston type compressors and comprises a piston slidably connected to the inner wall of an air cylinder, a connecting rod fixedly connected to the side end of the piston, a plurality of groups of air seals respectively sleeved and connected to the piston, and slidably connected with the inner wall of the air cylinder. A buffer groove is formed in the air seal around the axis in a penetrating mode, a plurality of sets of buffer holes are formed in the air seal at equal intervals, and the buffer holes communicate with one another. Due to the fact that the upper end and the lower end of the air seal abut against the air cylinder and the piston respectively, the buffer groove in the air seal reduces space, and the situation that the air seal expands and is damaged due to abutting of the air cylinder and the piston is avoided; the buffer groove can avoid the extrusion damage phenomenon caused by the fact that the air seal cannot release the volume due to thermal expansion and cold contraction, and it is guaranteed that the service life of the air seal cannot be shortened due to thermal expansion and cold contraction.

Description

TECHNICAL FIELD

[0001] The utility model relates to piston compressor technical field, concretely relates to a piston compressor sealing mechanism. BACKGROUND

[0002] The piston compressor is a kind of displacement compressor, it changes working volume by the reciprocating movement of piston in cylinder, realizes the suction, compression and discharge of gas, when piston moves to the end of cylinder, negative pressure is formed in cylinder, gas is inhaled;When piston reverses, the volume in cylinder decreases, gas is compressed and discharged through exhaust valve.

[0003] In prior art, gas seal is installed around piston, when piston reciprocates along cylinder inner wall, gas seal slides along cylinder inner wall following piston, gas seal can seal the gap between piston and cylinder, avoid gas leakage.

[0004] However, when gas seal rubs with cylinder inner wall for a long time, gas seal will expand and contract with heat, which reduces the service life of gas seal, even causes crack in the process of use, thereby affecting the use effect of gas seal. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a piston compressor sealing mechanism to solve the technical problem that, in prior art, when gas seal rubs with cylinder inner wall for a long time, gas seal will expand and contract with heat, which reduces the service life of gas seal, even causes crack in the process of use, thereby affecting the use effect of gas seal.

[0006] The technical problem solved by the utility model can be realized by the following technical scheme:

[0007] A piston compressor sealing mechanism, comprising:

[0008] Cylinder, piston is slidably connected to cylinder inner wall, connecting rod is fixedly connected to the side end of piston;

[0009] Gas seal, gas seal is provided with several groups and is connected to piston, gas seal is slidably connected to cylinder inner wall, buffer groove is provided in the inside of gas seal around the axis line;

[0010] Buffer hole, buffer hole is provided with several groups and is equidistantly distributed in the inside of gas seal, buffer hole and gas seal are interconnected.

[0011] As a further scheme of the utility model: the outer wall of piston is provided with several installation grooves along length direction, the inner wall of installation groove and gas seal are abuttingly connected.

[0012] As a further scheme of the utility model: the buffer hole inner wall is equipped with spring, spring axis line passes through piston axis line, and spring side end is fixedly connected with air seal.

[0013] As a further scheme of the utility model: the spring is fixedly connected with the column at one end away from the air seal, and the column is connected with the piston outer wall.

[0014] As a further scheme of the utility model: the air cylinder inner wall is fixedly connected with the detector at one end away from the piston.

[0015] As a further scheme of the utility model: the air seal is provided with connecting groove at one end, and the air seal two sides are fixedly connected with blocking pad, the connecting groove inner wall is connected with the connecting head, the connecting head is fixedly connected with the air seal other end, and the buffer groove penetrates the connecting head inside.

[0016] As a further scheme of the utility model: the blocking pad top end is provided with round angle, and the round angle cross section is semicircular.

[0017] The utility model discloses beneficial effect:

[0018] 1, when the drive device of prior art drives piston reciprocating motion along the air cylinder inner wall through connecting rod, piston takes along air seal reciprocating movement along the air cylinder inner wall, and air seal will produce heat because of friction with air cylinder inner wall, and air seal expands because of heat, and the air seal that collides will be big, because air seal upper and lower two ends are connected with air cylinder and piston respectively, and the buffer groove in air seal reduces space, avoids air seal expansion and is damaged due to the resistance of air cylinder and piston, when air seal cools and shrinks, air seal restores to initial state, and buffer groove restores to the space size at the beginning, and buffer groove can avoid the extrusion damage phenomenon that air seal cannot release volume due to thermal expansion and cold shrink, so that the service life of air seal is not reduced due to thermal expansion and cold shrink.

[0019] 2, the buffer hole further increases the buffer space, when air seal collides, air seal upper and lower two ends can extrude to the buffer hole, further enhances the effect that air seal handles thermal expansion and cold shrink, and simultaneously, under the premise that air seal satisfies the sealing of the gap between air cylinder and piston, the buffer groove and buffer hole reduce the material of air seal production, further reduce the production material cost of air seal. ACCURACY OF DRAWINGS

[0020] The utility model makes further explanation in combination with the drawings.

[0021] Figure 1 It is the overall structure schematic view of the utility model;

[0022] Figure 2 It is the piston structure plan view of the utility model;

[0023] Figure 3 A-A sectional view of the piston structure of the utility model;

[0024] Figure 4 B-B sectional view of the piston structure of the utility model;

[0025] Figure 5 A structure of the utility model at A is enlarged and shows a schematic view. Figure 3

[0026] Figure 6 A schematic view of the gas seal structure of the utility model.

[0027] In the figure: 1, cylinder; 2, piston; 3, connecting rod; 4, detector; 5, connecting groove; 6, connecting head; 7, gas seal; 8, mounting groove; 9, buffer groove; 10, blocking pad; 11, buffer hole; 12, spring; 13, abutting column; 14, round corner. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0029] As shown in Figures 1-6 A piston compressor sealing mechanism, comprising: a cylinder 1, a gas seal 7 and a buffer hole 11,

[0030] The piston 2 is slidably connected to the inner wall of the cylinder 1, the connecting rod 3 is fixedly connected to the side end of the piston 2, the gas seal 7 is provided in multiple groups and is connected to the piston 2, the gas seal 7 is slidably connected to the inner wall of the cylinder 1, the buffer groove 9 is provided in the gas seal 7 around the axis, when the driving device of the prior art drives the piston 2 to reciprocate along the inner wall of the cylinder 1 through the connecting rod 3, the piston 2 with the gas seal 7 reciprocates along the inner wall of the cylinder 1, the gas seal 7 generates heat due to friction with the inner wall of the cylinder 1, the gas seal 7 expands due to the heat, the colliding gas seal 7 becomes larger, the buffer groove 9 in the gas seal 7 reduces the space, avoiding damage of the gas seal 7 due to expansion caused by the abutting of the cylinder 1 and the piston 2, when the gas seal 7 cools and shrinks, the gas seal 7 returns to the initial state, the buffer groove 9 returns to the initial space size, the buffer groove 9 can avoid the extrusion damage phenomenon of the gas seal 7 due to the inability to release the volume caused by thermal expansion and cold contraction, ensuring that the gas seal 7 will not reduce the service life due to thermal expansion and cold contraction;

[0031] ​The buffer holes 11 are provided in several groups and are equidistantly distributed inside the air seal 7. The buffer holes 11 are in communication with the air seal 7. In order to further strengthen the air seal 7 to deal with thermal expansion and contraction, the buffer holes 11 further increase the buffer space. When the air seal 7 collides, the upper and lower ends of the air seal 7 can be extruded into the buffer holes 11, further enhancing the effect of the air seal 7 on thermal expansion and contraction. At the same time, under the premise of sealing the gap between the cylinder 1 and the piston 2, the buffer groove 9 and the buffer hole 11 reduce the material used for the production of the air seal 7, further reducing the production cost of the air seal 7.

[0032] In some embodiments, the outer wall of the piston 2 is provided with a plurality of installation grooves 8 along the length direction. The inner wall of the installation groove 8 is in abutting connection with the air seal 7. When the air seal 7 is installed on the piston 2, the air seal 7 is wrapped around the installation groove 8. The inner wall of the installation groove 8 is in abutting connection with the two ends of the air seal 7. The installation groove 8 can limit the air seal 7, thereby ensuring that the piston 2 can drive the air seal 7 to move synchronously.

[0033] In some embodiments, the inner wall of the buffer hole 11 is provided with a spring 12. The axis of the spring 12 passes through the axis of the piston 2. The side end of the spring 12 is fixedly connected with the air seal 7. After the thermal expansion and contraction of the air seal 7 ends, the air seal 7 returns to the initial state. At this time, the spring 12 provided in the buffer hole 11 provides elastic support force for the air seal 7. The support force provided by the spring 12 can ensure that the air seal 7 is always in abutting connection with the inner wall of the cylinder 1 during the process of dealing with thermal expansion and contraction, further ensuring the sealing effect of the air seal 7 on the gap between the cylinder 1 and the piston 2.

[0034] In some embodiments, the end of the spring 12 away from the air seal 7 is fixedly connected with an abutting column 13. The abutting column 13 is in abutting connection with the outer wall of the piston 2. In order to avoid the phenomenon that the spring 12 slides and causes scratches on the surface of the piston 2 when the spring 12 and the piston 2 are in abutting connection, the spring 12 is in abutting connection with the piston 2 through the fixed abutting column 13, avoiding the phenomenon that the spring 12 causes scratches on the surface of the piston 2. At the same time, the abutting column 13 and the inner wall of the buffer hole 11 are in abutting connection, which can ensure the stability of the spring 12 and prevent the axis of the spring 12 from changing when the air seal 7 is subjected to thermal expansion and contraction.

[0035] In some embodiments, the inner wall of the cylinder 1 is fixedly connected with a detector 4 at the end away from the piston 2. When the air seal 7 is used for a long time, the air seal 7 will be worn out. When the air seal 7 leaks air, the detector 4 can detect the change of air pressure and alarm in time, thereby reminding the staff to replace the air seal 7 in time.

[0036] In some specific embodiments, the air seal 7 is provided with a connecting groove 5 at one end, and is fixedly connected with a blocking pad 10 at two sides respectively, the connecting groove 5 is provided with a connecting head 6 clamped on the inner wall, the connecting head 6 is fixedly connected with the other end of the air seal 7, and the buffer groove 9 penetrates through the inside of the connecting head 6; when the air seal 7 is installed on the piston 2, the air seal 7 is wound on the installation groove 8, the connecting head 6 is clamped in the connecting groove 5, and the connecting head 6 and the inner wall of the connecting groove 5 are clamped and connected, so that the air seal 7 is fixed on the installation groove 8, wherein the buffer groove 9 penetrating through the connecting head 6 can ensure that the connecting head 6 can also be subjected to thermal expansion and cold shrinkage treatment.

[0037] In some specific embodiments, the blocking pad 10 is provided with a round corner 14 at the top end, and the cross section of the round corner 14 is semicircular; the blocking pad 10 can block the lubricating oil on the surface of the air seal 7, the lubricating oil is stored between the two groups of blocking pads 10, the lubricating oil can reduce the friction between the air seal 7 and the inner wall of the cylinder 1, and further ensure the service life of the air seal 7; the round corner 14 provided on the blocking pad 10 can further reduce the contact area of the blocking pad 10 and the air seal 7.

[0038] The above describes several embodiments of the utility model in detail, but the embodiments of the utility model are not limited to this, and cannot be considered as limiting the implementation scope of the utility model. Any equivalent changes and improvements made according to the application scope of the utility model should still belong to the patent coverage scope of the utility model.

Claims

1. A sealing mechanism for a piston compressor, characterized in that Include: The cylinder (1), the piston (2) is slidably connected in the inner wall of the cylinder (1), the connecting rod (3) is fixedly connected to the side end of the piston (2); The gas seal (7) is provided with several groups and is respectively sleeved on the piston (2), the gas seal (7) is slidably connected with the inner wall of the cylinder (1), and the buffer groove (9) is provided in the gas seal (7) around the axis line; The buffer hole (11) is provided with several groups and is respectively equidistantly distributed in the gas seal (7), and the buffer hole (11) and the gas seal (7) are communicated with each other.

2. A sealing mechanism for a piston compressor as claimed in claim 1, characterized in that The outer wall of the piston (2) is provided with a plurality of installation grooves (8) along the length direction, and the inner wall of the installation groove (8) is abuttingly connected with the gas seal (7).

3. A sealing mechanism for a piston compressor as set forth in claim 1, characterized in that The inner wall of the buffer hole (11) is provided with a spring (12), the axis line of the spring (12) passes through the axis line of the piston (2), and the side end of the spring (12) is fixedly connected with the gas seal (7).

4. A sealing mechanism for a piston compressor as claimed in claim 3, characterized in that The end of the spring (12) away from the gas seal (7) is fixedly connected with the abutting column (13), and the abutting column (13) is abuttingly connected with the outer wall of the piston (2).

5. A sealing mechanism for a piston compressor as set forth in claim 1, characterized in that The inner wall of the cylinder (1) is fixedly connected with the detector (4) at the end away from the piston (2).

6. A sealing mechanism for a piston compressor as set forth in claim 1, characterized in that The gas seal (7) is provided with a connecting groove (5) at one end, the blocking pad (10) is fixedly connected on both sides of the gas seal (7), the connecting groove (5) is provided with a connecting head (6) clamped and connected on the inner wall, the connecting head (6) is fixedly connected with the other end of the gas seal (7), and the buffer groove (9) penetrates the inside of the connecting head (6).

7. A sealing mechanism for a piston compressor as claimed in claim 6, characterized in that The top end of the blocking pad (10) is provided with a round corner (14), and the cross section of the round corner (14) is semicircular.

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