Crankshaft with streamline balance block and compressor
By designing streamlined balance blocks and drainage slots on the crankshaft of the piston refrigeration compressor, the resistance and noise problems caused by the collision of the balance block and refrigerant and lubricating oil during high -speed rotation have achieved the effect of reduced energy consumption and reduced noise.
Patent Information
- Application Number
- CN202421521274.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-01
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2034-07-01
AI Technical Summary
When the crankshaft of the existing piston refrigeration compressor rotates at high speed, the balance block collides with the refrigerant and splashing lubricant, resulting in an increase in motion resistance and increasing operating power consumption and noise.
Design a crankshaft with streamlined balance blocks. The balance block of the balance block is streamlined in the direction of the cut line, and the outer round surface is also streamlined. The arc drainage slot is set on the middle of the surface to diversion lubricating oil to reduce the balance block and lubrication. The impact between oil.
The resistance of the balance block is reduced by the streamlined design, the operating energy consumption is reduced, and the lubricating oil is reducing the noise through the drainage groove.
Smart Images
Figure CN222415621U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of reciprocating piston refrigeration compressors, in particular to a crankshaft and a compressor with a streamlined balancing block. Background Art
[0002] The structure of a piston compressor generally includes a crankshaft, which is equipped with a balance block. The balance block is used to balance the inertial force of the piston in the reciprocating direction under working conditions. Its balance amount and operating state directly affect the vibration, reliability and performance of the compressor. Conventional designs mainly focus on the moment of inertia of the balance block, and pay little attention to other dynamic indicators, such as operating resistance. Especially for variable-frequency compressors that run at high speeds, since they are fully enclosed compressors, the inside of the shell is filled with refrigerant and splashing lubricating oil. When the crankshaft rotates at high speed, the balance block collides with the refrigerant and splashing lubricating oil, resulting in increased movement resistance, thereby increasing operating power consumption and noise. Utility Model Content
[0003] The purpose of the utility model is to solve the problems existing in the above-mentioned existing crankshafts and to provide a crankshaft and a compressor with a streamlined balancing block.
[0004] The specific scheme of the utility model is: a crankshaft with a streamlined balancing block, comprising a long axis and an eccentric axis, a balancing block is arranged between the long axis and the eccentric axis, the balancing block is substantially semicircular, and the windward surface of the balancing block is streamlined in the tangential direction.
[0005] Furthermore, the outer circumferential surface of the balancing block is also streamlined and smoothly transitions to the windward surface.
[0006] Furthermore, a drainage groove is provided in the middle of the upper surface of the balancing block, and the drainage groove is arc-shaped and the center of the circle coincides with the axis of the long axis.
[0007] Furthermore, the bottom surface of the drainage groove is arc-shaped, and transition fillets are provided at the junctions between the two sides of the drainage groove and the upper surface of the balancing block.
[0008] Furthermore, the balance block is provided with rivet holes, the positions of the rivet holes are arranged away from the windward surface, and the rivet holes are used for riveting the counterweight block.
[0009] Furthermore, the streamline shape satisfies the Bernoulli curve equation, the brace curve equation, the quadratic curve equation, or the sine curve equation.
[0010] The utility model also provides a compressor which is equipped with the crankshaft of the structure.
[0011] Compared with the prior art, the utility model has the following advantages: by designing the windward surface of the balancing block to be streamlined, the resistance to the balancing block is reduced when the crankshaft rotates, and the noise of impacting the lubricating oil is reduced; by arranging a drainage groove to guide the splashing lubricating oil, the noise generated by the impact between the balancing block and the lubricating oil is further reduced. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a three-dimensional schematic diagram of the first embodiment of the utility model;
[0013] Figure 2 yes Figure 1 A top view of
[0014] Figure 3 yes Figure 2 AA view;
[0015] Figure 4 yes Figure 3 A magnified view of point B;
[0016] Figure 5 yes Figure 2 CC view;
[0017] In the figure: 1. eccentric shaft; 2. balancing block; 3. drainage groove; 4. long axis; 5. outer cylindrical surface; 6. windward side; 7. leeward side. DETAILED DESCRIPTION
[0018] Example 1 See Figure 1-4 This embodiment provides a crankshaft with a streamlined balancing weight 2, including a long axis 4 and an eccentric axis 1, a balancing weight 2 is arranged between the long axis 4 and the eccentric axis 1, the balancing weight 2 is generally semicircular, and the windward surface 6 of the balancing weight 2 is streamlined in the tangential direction. Furthermore, the outer cylindrical surface 5 of the balancing weight 2 is also streamlined and has a smooth transition with the windward surface 6.
[0019] Furthermore, a drainage groove 3 is provided in the middle of the upper surface of the balancing weight 2 . The drainage groove 3 is arc-shaped and the center thereof coincides with the center of the long axis 4 .
[0020] Furthermore, the bottom surface of the drainage groove 3 is arc-shaped, and transition fillets are provided at the junctions of the two sides of the drainage groove 3 and the upper surface of the balancing block 2.
[0021] Furthermore, the balance block 2 is provided with rivet holes, and the position of the rivet holes is set away from the windward surface 6. The rivet holes are used for riveting the counterweight block to meet different working conditions.
[0022] Furthermore, the streamline shape satisfies the Bernoulli curve equation. This embodiment also provides a compressor equipped with a crankshaft of the above structure.
[0023] Embodiment 2 This embodiment has a substantially similar structure to that of Embodiment 1, except that the streamline of the windward surface 6 satisfies the equation of the fastest curve. Embodiment 3 This embodiment has a substantially similar structure to that of Embodiment 1, except that the streamline of the windward surface 6 satisfies the equation of the quadratic curve. Embodiment 4 This embodiment has a substantially similar structure to that of Embodiment 1, except that the streamline of the windward surface 6 satisfies the equation of the sine curve.
[0024] The working principle of the utility model is as follows: when the compressor is running, the crankshaft rotates in a clockwise direction. At this time, the windward surface 6 collides head-on with the refrigerant gas and the splashing lubricating oil to generate a large resistance. The utility model designs the windward surface 6 to be streamlined, which greatly reduces the resistance, thereby reducing energy consumption and reducing the noise generated by the impact of the lubricating oil.
[0025] The utility model also designs the leeward surface 7 of the balance block 2 to be streamlined in the same manner as the windward surface 6, so as to prevent the refrigerant gas from forming eddies or turbulences at the leeward surface 7 when the crankshaft rotates at high speed, thereby avoiding negative impacts on the movement of the crankshaft.
Claims
1. A crankshaft with a streamlined balancing block, comprising a long axis and an eccentric axis, a balancing block is arranged between the long axis and the eccentric axis, the balancing block is generally semicircular, and is characterized by: The windward surface of the balancing block is streamlined in the tangential direction.
2. A crankshaft with a streamlined balancing block according to claim 1, characterized in that: The outer circumferential surface of the balancing block is also streamlined and smoothly transitions to the windward surface.
3. The crankshaft with a streamlined balancing block according to claim 1, characterized in that: A drainage groove is provided in the middle of the upper surface of the balancing block. The drainage groove is arc-shaped and the center of the circle coincides with the center of the long axis.
4. A crankshaft with a streamlined balancing block according to claim 3, characterized in that: The bottom surface of the drainage groove is arc-shaped, and transition fillets are provided at the junctions of the two sides of the drainage groove and the upper surface of the balancing block.
5. The crankshaft with a streamlined balancing block according to claim 1, characterized in that: The balance block is provided with rivet holes, the positions of the rivet holes are arranged away from the windward surface, and the rivet holes are used for riveting the counterweight block.
6. The crankshaft with a streamlined balance block according to claim 1, characterized in that: The streamline shape satisfies the Bernoulli curve equation.
7. The crankshaft with a streamlined balance block according to claim 1, characterized in that: The streamline shape satisfies the brace curve equation, the quadratic curve equation or the sine curve equation.
8. A compressor, characterized in that: Equipped with a crankshaft according to any one of claims 1 to 7.